CN201264237Y

CN201264237Y - Pneumatic tool with function for adjusting torsion in section

Info

Publication number: CN201264237Y
Application number: CNU2008201263004U
Authority: CN
Inventors: 吕国洲
Original assignee: ZHENGHENG INDUSTRIAL Co Ltd
Current assignee: ZHENGHENG INDUSTRIAL Co Ltd
Priority date: 2008-08-26
Filing date: 2008-08-26
Publication date: 2009-07-01
Anticipated expiration: 2018-08-26

Abstract

The utility model discloses a pneumatic tool with the function of adjusting torque force piecewisely. The pneumatic tool comprises a body, a cylinder is arranged in a holding space and is provided with an air inlet hole, and a rotor is arranged in the cylinder. The pneumatic tool is characterized in that one side of the cylinder tube of the cylinder is provided with a plurality of groups of air exit holes, an exhaust-stream switching component is arranged between each air exit hole of the cylinder tube and an exhaust flow passage of the body, and airflow for switching exhaust is exhausted through different air exit holes, therefore, the pneumatic tool is enabled to adjust torque force state piecewisely and effectively enhance the practical progress of torque force.

Description

Have the torsion sectional and adjust the pneumatic tool of function

Technical field

The utility model relates to a kind of pneumatic tool, is meant that especially a kind of switching kenel by a plurality of steam vents reaches the innovation structure design that torsion can be adjusted purpose.

Background technology

At present, on pneumatic tool uses, along with at the difference of target piece, must adjust its torque magnitude and tackle respectively; Existing air tool torsion is adjusted structural design, normally adjusts rotor speed by the adjustment structure of air inflow size, reaches the purpose that changes torsion.

Yet because in the pneumatic tool running, extraneous gas imports cylinder and drives in the rotor process, the air that imports in the cylinder space must arrive the set steam vent position of cylinder through identical crush stroke, could discharge outside; Therefore, when air inflow increases to some extent, to be limited by gas imports and the stroke stationary state of discharging, make rotating speed, the torsion of this rotor in fact still be suppressed and be difficult to obvious raising, so cause existing air tool torsion still to be difficult to problem and shortcoming that remarkable lifting, torsion state can't be adjusted variation really all the time by this subjective condition.

Other has industry to develop a kind of improvement structure, move design before its skew by the set steam vent of cylinder, order imports the air of cylinder space and goes through short crush stroke, advance to reach the suitable purpose of just changeing torsion and bigger counter-rotating torsion, but this structure still is the fixing use pattern of torsion, is difficult to satisfy the shortcoming of polynary user demand so still exist shortcoming to adjust variability.

Use upward existing problem at above-mentioned existing pneumatic tool, how to develop the innovation structure that a kind of torsion can be adjusted variation really, have more desirable practicality, the industry that remains in fact to be correlated with is thought target and the direction that breaks through again.

In view of this, the inventor is according to the manufacturing development of being engaged in Related product for many years and design experiences, at above-mentioned target, in detail after design and the scrupulous assessment, eventually the utility model of a true tool practicality.

The utility model content

Main purpose of the present utility model, provide a kind of pneumatic tool that the torsion sectional is adjusted function that has, the problem that its desire solves is can't adjust the problem of variation really and thought breakthrough at still existing torsion to be difficult to remarkable lifting, torsion state on the existing pneumatic tool structural design.

Pneumatic tool provided by the utility model mainly comprises: body, and its end group is provided with the output shaft assembly, and this body also is provided with grip part, inlet suction port and grate flow channel, then has accommodation space in this body; One cylinder is mounted in the body accommodation space, and this cylinder comprises a cylinder barrel, two end caps and air admission hole; One rotor is hubbed at this cylinder internal as off-centre, and this rotor has moving vane.

The technical characterstic that the utility model is dealt with problems, mainly be: cylinder barrel one side of described cylinder is provided with the plural groups steam vent, again between each steam vent of described cylinder barrel and the described body grate flow channel and be provided with an exhaust flow path switching member, thereby make the air-flow that switches exhaust carry out exhaust by different steam vents.

Innovation unique design of the present utility model makes the relative prior art of the utility model, roughly can reach following beneficial effect:

The pneumatic tool that the utility model provides with torsion sectional adjustment function, the percolation hole of controlling its rotary valve by the exhaust flow path switching member to be positioned at cylinder barrel set not on the same group the switch forms of steam vent reach the purpose of adjusting torsion, because what change is gas compressed haul distance in cylinder space, described haul distance is long more, the suffered air pressure thrust of the running of rotor is big relatively more, so torsion is big more, therefore design of the present utility model can make pneumatic tool have torsion state and be able to the practical improvement that certain segmentation adjustment changes, effectively promotes torsion.

Description of drawings

Fig. 1 is the exploded perspective view of the utility model structure preferred embodiment;

Fig. 2 is the plane schematic side view of the utility model structure preferred embodiment;

Fig. 3 is that exhaust flow path actuator state of the present utility model is implemented illustration one;

Fig. 4 is that exhaust flow path actuator state of the present utility model is implemented illustration two;

Fig. 5 is that exhaust flow path actuator state of the present utility model is implemented illustration three.

The specific embodiment

See also shown in Fig. 1,2,3, have an air tool preferred embodiment that the torsion sectional is adjusted function for what the utility model provided, but these embodiment are not subjected to the restriction of this structure only for the usefulness of explanation in patent application; Described pneumatic tool A comprises following structure:

One body 10, its front end is provided with an output shaft assembly 11, these body 10 bottom sides also are provided with a grip part 12, an inlet suction port 13 and a grate flow channel 14, then has an accommodation space 15 in the described body 10, again, be provided with an air inlet runner 16 in the described grip part 12 and join with described inlet suction port 13, top, 12 front side, described grip part be provided with a rotating switch unit 17 in order to switch inlet air flow to;

One cylinder 20, be located in the accommodation space 15 of described body 10, this cylinder 20 includes a cylinder barrel 21 and two

end caps

22,23, again, this cylinder 20 has air admission hole 24 (comprising the air admission hole that generation is just changeed, reversed) to import air pressure, and described air admission hole 24 is divided into two end faces of described cylinder barrel 21 and is microscler inner groovy kenel;

One rotor 30 is hubbed at described cylinder 20 inside as off-centre, and this rotor 30 has moving vane 31, and this rotor 30 can order about by the air pressure that aforementioned air admission hole 24 is imported and rotate, and then the described output shaft assembly 11 of interlock produces the operating state of rotation;

Organize

steam vents

41,42,43 more, be located at cylinder barrel 21 1 sides of cylinder 20, present embodiment provides the kenel that is provided with of three groups of

steam vents

41,42,43;

One exhaust flow path switching member 50 is located between each

steam vent

41,42,43 and described body 10 set grate flow channels 14 of described cylinder barrel 21, and the air-flow that is used for switching exhaust carries out exhaust from

different steam vents

41,42,43.

Wherein, also can be provided with a rotating switch unit 17 between the air inlet runner 16 of described body 10 and the described cylinder 20, be used for switching the positive and negative path direction that air-flow imports described cylinder 20.

Wherein, the concrete structure of described exhaust flow path switching member 50 is formed, and can include a rotary valve 54, a toggle 55 and a plurality of

communication channel

51,52,53; Making described body 10 install a tank 18 in the bottom side gap digit of cylinder 20 cylinder barrels 21 is positioned at wherein for described rotary valve 54 pivot groups, the upside of this tank 18 is by these

communication channels

51,52,53 with described cylinder barrel 21

set steam vents

41,42,43 are communicated with separately, described rotary valve 54 1 end tools one exhaust outlet 541 normalities are connected with the grate flow channel 14 of described body 10, described rotary valve 54 sidepiece tools one percolation hole 540 can be along with the rotational angle difference of this rotary valve 54, constitute described percolation hole 540 can with the preference pattern state of described

different communication channels

51 or 52 or 53 phase contraposition conductings, and described toggle 55 is mounted on the outer end of described rotary valve 54, uses for the user and dials the described rotary valve 54 of commentaries on classics drive.

Form design based on said structure, now be described as follows with regard to use mode of operation of the present utility model:

As shown in Figure 2, implement the stream schematic diagram (being air tool side-looking angle) of kenel for aforementioned structure, its external pressure W is imported by the inlet suction port 13 of described body 10 bottoms, import in the cylinder 20 to drive described rotor 30 by the set air admission hole 24 of two end faces of described cylinder barrel 21 by described grip part 12 inner air inlet runners 16, rotating switch unit 17 backs again, then, air pressure W can discharge from the set steam vent 41 of cylinder barrel 21 downsides (or 42,43) of cylinder 20, further discharges outside by described body 10 grip parts 12 set grate flow channels 14.

Then, please contrast shown in Fig. 3,4,5, the user can carry out the selection adjustment of exhaust flow path by described exhaust flow path switching member 50, and then select exhaust stream by described cylinder barrel 21 set which

group steam vent

41 or 42 or 43 to be discharged, thereby reach the purpose of modulation torsion; Be provided with the kenel of three groups of

steam vents

41,42,43 with present embodiment, during the toggle 55 that Figure 3 shows that described exhaust flow path switching member 50 is put and the percolation hole 540 that constitutes described rotary valve 54 and interlude communication channel 51, steam vent 41 be the state of contraposition conducting mutually.And described toggle 55 is pulled to figure the left side when holding to the greatest extent (as shown in Figure 4) as the user, the percolation hole 540 that constitutes described rotary valve 54 and right side section steam vent 43 be the state of contraposition conducting mutually.And when the user pulls with this toggle 55 that hold to the greatest extent on the right side to figure (as shown in Figure 5), the percolation hole 540 that constitutes described rotary valve 54 and left side section steam vent 42 be the state of contraposition conducting mutually.And change with the alignment of described cylinder barrel 21 set

different steam vents

41,42,43 by the percolation hole 540 of described rotary valve 54, mainly can change air pressure W and enter cylinder barrel 21 inner backs to the stroke length of discharging, and then can change the torque magnitude that rotor 30 turns round: when the stroke of this air pressure W is longer relatively, the relative raising of the motive force of rotor 30 is strengthened its torsion; Otherwise when the stroke of air pressure W relatively more in short-term, then cause the torsion of rotor 30 to reduce.The user can carry out the needs of modulation with the reply duty according to this characteristic, for example: when loosening bolt with rotor 30 reverse patterns, need finish with big torsion, only need to adjust described exhaust flow path switching member 50 this moment to the long section of air pressure stroke; And when changeing tight bolt with rotor 30 positive revolving die formulas, then only need hang down torsion can finish, only need to adjust described exhaust flow path switching member 50 this moment to the short section of air pressure stroke.

Advantage of the present utility model:

1, the main innovation unique design of the utility model by setting up described exhaust flow path switching member and many group steam vents being set, utilized percolation hole contraposition that described exhaust flow path switching member controls its rotary valve to cylinder barrel set not on the same group the switch forms of steam vent reach the purpose of adjustment torsion.Because what change is gas compressed haul distance in cylinder space, described haul distance is long more, and the suffered air pressure thrust of the running of rotor is big relatively more, so torsion is big more; Otherwise it is then more little.Therefore, design of the present utility model can make pneumatic tool reach torsion state and be able to adjust really the practical improvement that changes, effectively promotes torsion.

2, the utility model comprises the design that described rotary valve, toggle and a plurality of communication channel institute structure are formed by the concrete structure of described exhaust flow path switching member, member most simply has to save to be made processing and organizes the preferable industrial economy benefit of founding cost, and in torsion segmentation adjustment operation, only need can to reach easily by stirring of described toggle, so reach control conveniently, handy practical improvement.

3, the air admission hole of the utility model by described cylinder is divided into two end faces of described cylinder barrel and is the design of inner groovy kenel; make the cold air of this cylinder of importing and the contact area of cylinder barrel barrel significantly increase; friction in the time of can rotating because of rotor owing to this cylinder barrel barrel produces high temperature; therefore be divided into the design of two end faces of cylinder barrel by this air admission hole; can utilize its position that imports cold air to contain cylinder barrel two ends region design, reach the effect multiplication that cools, protection parts, the advantage that increases the service life and progressive.

The content that the foregoing description disclosed is only in order to specifying the utility model, though and describe by specific term in the literary composition, when not limiting claim of the present utility model with this; The personage who is familiar with this technical field is when can be after understanding spirit of the present utility model and principle it is changed and revise and reaching equivalent purpose; and these changes and modification all should be covered by in claims of the present utility model scope required for protection.

Claims

1, a kind of pneumatic tool with torsion sectional adjustment function is characterized in that, comprises:

One body, its end is provided with the output shaft assembly, and this body also is provided with grip part, inlet suction port, air inlet runner and grate flow channel, is provided with an accommodation space in this body;

One cylinder is located in the accommodation space of described body, and this cylinder comprises a cylinder barrel, two end caps and air admission hole;

One rotor is hubbed at described cylinder internal as off-centre, and this rotor has moving vane;

At least one group of steam vent is located at cylinder barrel one side of described cylinder;

One exhaust flow path switching member is located between each steam vent and described body grate flow channel of described cylinder barrel, carries out exhaust in order to the air-flow that switches exhaust by different steam vents.

2, the pneumatic tool with torsion sectional adjustment function according to claim 1 is characterized in that described exhaust flow path switching member includes a rotary valve, a toggle and at least one communication channel; Making described body install a tank at the bottom side of cylinder cylinder barrel gap digit is positioned at wherein for described rotary valve pivot group, the upside of described tank is communicated with the set steam vent of described cylinder barrel separately by the described communication channel that waits, described rotary valve one end tool one exhaust outlet normality is connected with the grate flow channel of described body, described rotary valve sidepiece tool one percolation hole can be along with this rotary valve rotational angle difference, constitute described percolation hole and described different communication channel phase contraposition conductings, described toggle is located at the outer end of described rotary valve, drives for dialling to change.

3, the pneumatic tool with torsion sectional adjustment function according to claim 1 is characterized in that, is provided with a rotating switch unit between the air inlet runner of described body and the described cylinder, in order to switch the positive and negative path direction that air-flow imports described cylinder.

4, the pneumatic tool with torsion sectional adjustment function according to claim 1 is characterized in that the air admission hole of described cylinder can be divided into two end faces of this cylinder barrel and be the inner groovy kenel.