CN101031390A

CN101031390A - Gas driven actuation feed tube for combustion powered fastener-driving tool

Info

Publication number: CN101031390A
Application number: CN 200580032993
Authority: CN
Inventors: 诺贝特·K.·科沃杰伊; 谢里尔·L.·帕纳西克; 凯文·M.·塔克; 詹姆斯·W.·罗宾逊; 龚永平
Original assignee: Illinois Tool Works Inc
Current assignee: Illinois Tool Works Inc
Priority date: 2004-09-01
Filing date: 2005-08-26
Publication date: 2007-09-05
Anticipated expiration: 2025-08-26
Also published as: CN100551632C

Abstract

A combustion tool having a gas actuated magazine advance includes a combustion chamber defined in part by a cylinder, a valve sleeve axially reciprocating relative to the cylinder and an upper surface of a piston, a pneumatically actuated magazine fastener mechanism, and an exhaust driven actuation feed tube having a first end configured for insertion into an opening in the cylinder in fluid communication with the combustion chamber and a second end connected to the magazine fastener advance mechanism.

Description

The gas driven actuation feed tube that combustion powered fastener-driving tool is used

Technical field

The present invention relates generally to and be used for, and be specifically related to combustion powered fastener-driving tool, be also referred to as combustion tool the fastener-driving tools of fastener drive to workpiece.

Background technology

Combustion-powered tool is known in technical field, known this kind of class instrument is an IMPULSE  board instrument, be used for driving securing member and enter workpiece, this product is described in the patent U.S.Pat.Re.No.32452 of the common Nikolich that transfers the possession of and U.S.Pat.Nos.4522162,4483473,4483474,4403722,5197646,5263439 and 6145724, and the full content of above-mentioned patent is incorporated this paper by reference into.Similarly combustion-powered nail and staple driven tool can be from ITW-Paslode of Vernon Hills, and Illinois buys, and plate is IMPULSE , BUILDEX  and PASLODE .

This type of instrument generally includes the pistol-shaped tool housing, the small-sized explosive motor of packing in this housing.Engine is also referred to as fuel tank power is provided by the pressurized fuel gas tank.The power distribution unit of battery power produces spark lighting, and the fan that is positioned at the combustion chamber not only provides the efficient burning of combustion chamber, and helps the carrying out of the step of servicing unit burn operation.Such additional step comprises: fuel is introduced the combustion chamber; Fuel combination and air in the combustion chamber; Remove or remove combustion by-products.Engine comprises reciprocating-piston, and reciprocating-piston has the rigid driver blade that is arranged in the elongation in the single cylinder block.

When the pulling trigger, it produces the gas of spark to be full of in the ignition engine combustion chamber, and the piston of combination and driven vane are pushed down to clash into oriented securing member and to drive it and enter in the workpiece.Then, piston turns back to its initial position or prefiring position by the draught head in the cylinder.Securing member is with magazine-style nose spare, and the direction that is retained as suitable location in nose spare is to accept the bump of driving chip.

Traditional combustion formula fastener-driving tools uses straight formula nail casket, its each keep 75 securing members approximately.In certain operations is used, particularly in the commercial construction projects, need to drive within a short period of time the instrument of larger amt securing member.The use of coiling nail casket that can hold more securing member is very general in electronic or Pneumatic fastener driving tool, but owing to multiple reason, this type of nail casket can not be applicable to combustion formula instrument.The reason that this type of high power capacity nail casket is not suitable for using in these instruments comprises that the additional weight of securing member makes operator's premature fatigue, and the operation nail casket required additional energy that advances of reeling also is not proved to be reliable.

In the U.S. Patent No. 5558264 of the commonly-assigned us of incorporating this paper by reference into, a kind of equipment has been described, be used for using turning to burning gases to drive pneumatic nail casket the nail casket of for example reeling.In this list of references, turn to pipeline to be positioned on the instrument, the one end is installed in the cylinder wall by the plush copper joint, and the position between the cylinder block top and bottom is also between the uppermost position in fig-ure and exhaust outlet of driven plunger.This pipe extends outside tool housing and is connected to pneumatic operation feed mechanism cylinder in its opposite end.In fact, the system that has been found that ' 264 patents can not satisfy the operation purpose.Shortcoming is the shortage of the power that exhaust stroke produced of the power source that has realized that, and this can not drive the nail casket reliably and drive into mechanism.

Therefore, need a kind of combustion powered fastener-driving tool, it can operate high power capacity nail casket reliably, and the nail casket includes but not limited to reel.Also need a kind of combustion powered fastener-driving tool, the gas that its design is used for using burn cycle reliably and is produced drives the nail casket and drives into mechanism.

Summary of the invention

Above-mentionedly need produce the gas-powered supply pipe by the exhaust of the present invention that is used for combustion powered fastener-driving tool or other burning and satisfy or surmount.So that the nail casket advances, pipe end is connected to cylinder to be communicated with combustion chamber fluid in order to increase power.Similarly, the how combustion powered driving nail casket that can be used for advances.Pipe of the present invention is connected to instrument and need not special joint, this air-flow that reduced under a cloud.In addition, this pipe is arranged in tool interior and damages in the normal running or the processing procedure of exerting oneself avoiding.

More specifically, the combustion formula instrument with gas actuated magazine advance comprise by cylinder, with respect to cylinder axis to the combustion chamber that the valve pocket that moves back and forth and piston face partly form, and pneumatic nail casket driving mechanism.The exhaust gas drive supply pipe has second end that designs first end that is communicated with combustion chamber fluid in the hole that is used for being inserted in the cylinder and be connected to nail casket driving mechanism.

In another embodiment, the exhaust gas drive pipe is designed for firing in the formula instrument, and combustion formula instrument has by cylinder and with respect to cylinder axis and partly forms to the valve pocket that moves back and forth, and combustion formula instrument also has and is used to follow closely casket and drives into pneumatic actuation cylinder.Pipe comprises: first end, and with respect to vertical axis tilt, and the Kong Zhongyu combustion chamber fluid that design is used for inserting in the cylinder is communicated with; Sleeve part, axially contiguous first end, and design is used for being arranged between cylinder outside and the valve pocket inside, so that valve pocket freely moves back and forth with respect to cylinder; Exhaust portion, axially contiguous sleeve part, and the air bleeding valve of the instrument of centering on forms common C shape; And drive division, axially contiguous exhaust portion, and design is used for and follows closely casket and drive the cylinder fluid and be communicated with.

Description of drawings

Fig. 1 is the local vertical profile front view that is applicable to the combustion powered fastener-driving tool that combines with exhaust gas drive effect supply pipe of the present invention.

Fig. 2 is the front view of the exhaust gas drive supply pipe of the present invention in the partial vertical sectional view.

Fig. 3 is the local amplification view of instrument shown in Figure 1.

Fig. 4 be applicable to another embodiment of the present invention be used to drive vertical sectional view before local that the combustion powered fastener-driving tool of the gas supply pipe that securing member advances combines.

Fig. 5 is equipped with the partial, longitudinal cross-sectional that is used to use the combustion powered fastener-driving tool of discharging the prior art systems that gas-powered nail casket advances.

The specific embodiment

Referring now to Fig. 1, the combustion powered fastener-driving tool that is suitable for together using with exhaust gas drive supply pipe of the present invention totally represents with 10, and preferred combination is above referenced and by with reference to professor's content of incorporating the patent of this paper into.Yet, can think that this system is applicable to the polytype combustion powered fastener-driving tool with multiple structure.Main casing 12 has the halfbody of two clamshell style usually and is packaged with combustion powered source, by 14 totally expressions.As is known in the art, in the upper end 16 of instrument 10, power source 14 has the cylinder head 18 that supports spark plug and preferably has fan 19 (Fig. 5).

Relative with upper end 16, lower end 20 comprises the nose spare 22 that is fixed in power source 14 and has the workpiece contact component 24 that axially moves back and forth with respect to it.Workpiece contact component 24 comprises fastener depth adjuster 26.The various embodiments of this type of adjuster well known in the art and here shown in structure should not to be considered to this instrument 10 necessary.Driving chip pipeline 28 in the nose spare 22 holds the driving chip 30 that is fixed in piston 34 with upper end 32 slidably.Driving chip 30 is shown as part hollow, but solid driving chip also can be considered.The lower end 36 of driving chip 30 is designed to combine and it is driven in the workpiece with securing member (not shown) in supplying to nose spare 22 by nail casket (not shown), as well known in the art.

Linkage (not shown) is connected to workpiece contact component 24, is used for the mobile valve pocket 38 that is delivered to of endwisely slipping of these parts, and valve pocket 38 centers on cylinder 40 fixing in the instrument 10.Before burning and driving securing member, instrument 10 compresses workpiece and makes workpiece contact component 24 overcome biasing force to move axially with respect to nose spare 22.Moving up of linkage makes the upper end 42 of valve pocket 38 engage and close combustion chamber 44 with cylinder head 18.When piston was positioned at the burning front position, combustion chamber 44 was formed at lower end (with the local table that shows of shade, also being shown in the prior art version among Fig. 5) by the upper end 46 of cylinder 40 and the upper surface 48 of piston 34 in Fig. 3.

Referring now to Fig. 1 and 3, upwards the advancing of annular stop 50 limited piston 34.Have, when combustion chamber 44 compressed the workpiece closure by instrument 10, O shape ring 52 or similar O-ring seal were adapted to valve pocket 38 slidably and engage with respect to the slip of cylinder 40 and with the lower inner edge 54 of valve pocket again.Therefore, combustion chamber 44 is formed by the upper end 46 of cylinder head 18, valve pocket 38, cylinder 40 and the upper surface 48 of piston 34.

Refer again to Fig. 1, be contemplated that, this instrument 10 has nail casket (not shown), and the nail casket is supplied with power by the nail casket fastener that is similar to U.S. Patent No. 5558264.Driving into by gas-powered of this type of nail casket securing member used securing member to supply with and driven suction casig 56, and it can regard the representative of following closely the casket fastener as in this applications.Cylinder 56 preferably is connected to the mouth of pipe 22 and is communicated with internal channel 58 fluids.As well known in the art, the piston in the cylinder 56 (not shown) is biased into primary importance in the cylinder by spring (not shown).Piston is connected to and follows closely the toggle linkage (not shown) of casket associating.Gas stress acts on the piston in the cylinder 56 is enough to overcome the bias effect of spring, and makes piston shift to the second place, and this will make the toggle linkage action and cause securing member to be transported in the nose spare 22 being used for and drive.

Referring now to Fig. 1-3, the feature of this instrument 10 is gas-powered supply pipes 60, this pipe 44 drives the gas that suction casig 56 carries burning to produce to nail casket securing member from the combustion chamber, is preferably discharge gas, comes to prepare for next burn cycle to be used to impelling securing member to drive and to enter nose spare 22.The advantages that pipe 60 surpasses the prior art structure comprise that pipe 60 is arranged in housing 12, are easy to damage can not resembling in U.S. Patent No. 5558264 under the disclosed pipe situation of living in or disconnect and connecting.Another advantage of pipe 60 of the present invention is not have special plush copper joint, and it needs screw thread coupling or knuckle joint to be connected to instrument 10 will manage 60.The another advantage of this pipe 60 is, can be fixed on each tie point and tool using not.An advantage is again, is placed on gas supply pipe 60 in the combustion chamber 44 or is communicated with combustion chamber 44 fluids at least, and also or the bottom of cylinder 40 (Fig. 4), the end of advancing of piston 34 here makes the securing member feed system to repeat and reliably.Though can consider other material, manage 60 by the stainless steel manufacturing, be preferably 11 specifications, 304 stainless steels, yet also can consider the durable heat proof material of other equivalence.

More specifically, referring now to Fig. 2, pipe 60 has: first end 62 is designed for inserting in the hole 64 (the best illustrates in Fig. 3) in the upper end 46 of cylinder 40, and is communicated with combustion chamber 44 fluids; And second end 66, it is connected to nail casket driving mechanism, and particularly cylinder 56.First end 62 of pipe 60 tilts with angle [alpha] with respect to vertical tubular axis.In a preferred embodiment, the angle lapping gradient is about 10 ° so that normal action of tool with respect to vertical tubular axis, yet also can consider other amounts of angular deflection.

Referring now to Fig. 3, angle [alpha] is arranged in the hole 64 above the upper surface that end 62 can be inserted into the inner and piston 34 of sealing O shape ring 52.Simultaneously, because pipe 60 inside that are placed in the instrument 10, valve pocket 38 still can be installed cylinder on the throne 40 slips with respect to having pipe.

Refer again to Fig. 2, pipe 60 also comprises sleeve part 68, its axially contiguous first end 62, and be designed to be positioned between the lower inner edge 54 of the outside 70 (Fig. 3) of cylinder 40 and valve pocket 38, so that valve pocket freely moves back and forth with respect to cylinder.Sleeve part 68 usually along or form the longitudinal axis of pipe 60.Exhaust portion 72 is connected to sleeve part 68, axially contiguous sleeve parts 68 of exhaust portion 72 and form the roughly C shape (Fig. 1) that is made of four ancons around the discharge valve apparatus 74 of instrument.Be contemplated that the concrete structure of exhaust portion 72 and can be assumed to be from managing that 60 the longitudinal axis departs from and the arbitrary shape in gap being provided without limits around discharge valve apparatus 74.This class instrument as is known, discharge valve apparatus 74 is arranged in the cylinder 40, and allow gas from cylinder internal to outside one-way flow.

Being included in the exhaust portion 72 is main sections 76, and it is parallel with described sleeve part usually and have two ends 78 and 80.Fillet is made in each

end

78,80, to carry out the transition to its sleeve part 68 under the situation of end 78 and carry out the transition to its drive division 82 under the situation of end 80.The radiused configuration of

end

78,80 reduces to produce that air-flow suppresses knot may and promote that gas flows freely, and this has improved securing member and has supplied with the performance of driving suction casig 56.In addition, rounded

end

78,80 helps managing 60 and remains in the instrument 10 and need not tool using or other jointing.

The axially contiguous exhaust portion 72 of drive division 82, and be designed for supplying with securing member and drive suction casig 56 fluids and be communicated with.In addition, drive division 82 ends at second end 66 of pipe 60, and the tie point that drives suction casig 56 with securing member also is second end 66 of pipe 60.As best expression among Fig. 1, except that the trifle section 84 of drive division 82, whole pipe 60 is positioned at instrument 10.

Though obtained acceptable result in the passage 58 by first end 62 being inserted in the hole 64 and second end 66 being positioned over, but can improved result by place chemical bonding agent 86 in the junction of each

end

62,66 and associated

vessel

64,58, this bonding agent comprises the suitable heat resistanceheat resistant sealant and the mixture of bonding agent or this type of character.Specially suitable chemical bonding agent 86 with sealed nature is by Henkel Corporation, the Loctite  bonding agent that Rocky Hill Connecticut makes.

Pipe 60 is positioned in the instrument 10 and provides enough gas stress to drive suction casig 56 to drive the securing member supply reliably, and instrument 10 has the discharge capacity of variation.Has 19.5in ³First instrument of the engine of size has the interior internal diameter of about 0.077-0.100 inch scope and the pipe 60 of about 11.18 inchages.This pipe is more straight relatively, and does not have the bend pipe of exhaust portion 72.Has 16.8in ³Second instrument of the engine of size has the interior internal diameter of about 0.077-0.100 inch scope and the pipe 60 of about 11.063 inchages, and four bend pipes.Has 7.9in ³The 3rd instrument of the engine of size has the interior internal diameter of about 0.100-0.160 inch scope and the pipe of about 10.5 inchages.Be similar to the situation of first instrument, the 3rd instrument is more straight relatively.The formula v=∏ r that above-mentioned value is used to obtain cylinder volume ²H determines the volume of pipe, and with respect to the engine displacement volume of pipe relatively, the volume of finding pipe be engine displacement about 0.25% and 1.05% between the time obtain optimum.Therefore, will find that pipe 60 of the present invention can be this instrument and variable displacement is provided and also can provides reliable nail casket to drive into result.

Referring now to Fig. 4, shown another embodiment of the combustion powered fastener-driving tool of Fig. 1 among the figure, and totally be expressed as 100.Instrument 100 has many same parts with instrument 10, and it is marked with same reference numbers.The aforesaid operations of instrument 10 can be used for instrument 100 usually.The main difference part of instrument 100 is that exhaust gas drive supply pipe 60 is replaced by the gas supply pipe 102 of the lower end that is positioned at cylinder 40 at ring edge 104 places.Edge 104 forms axial hole 106, and driving chip 30 moves back and forth by this hole.Gas supply pipe port one 08 also is formed in the edge 104, and size is made the upper end 110 with friction fixed supply pipe 102.Be similar to the situation of pipe 60, can use chemical bonding agent or sealant more firmly end 110 is held in place.

110 these positions in flue port one 08, upper end make pipe 102 be communicated with cylinder 40 fluids.Though as piston return buffer 112 is positioned on the upper surface 114 of ring edge 104 usually in this type of instrument, but can consider between buffer 112 and cylinder 40, to leave enough gaps, enter pipe 102 and operate the securing member supply and drive suction casig 56 so that the gas that burning back is promoted forward by piston 34 has enough volumes and pressure.The existence of air bleeding valve 74 is not counted as the shortcoming that produces enough gas stress.Therefore, owing to discharge gas is the function that produces the stress that piston 36 is pushed in cylinder 40 downwards, its generation is used to drive the stress of cylinder 56, though the cylinder 56 of instrument 10 is directly by discharging gas-powered, 102 acceptance discharges of the pipe of instrument 100 gas-powered.What also can consider is that upper end 110 can be positioned at other zone of cylinder 40 lower ends, and still can obtain gas pressure and volume that enough being used to drives cylinder 56.

The joint 118 of the tube segment 120 of the instrument of being positioned at 100 inside is fixed in the opposite end 116 of gas supply pipe 102, and is communicated with interior conduit 58 fluids.Be similar to the connection of second end 66 of pipe 60 in the connection of this point, end 122 is contained in the pipeline 58.Between joint 118 and end 110, supply pipe 102 is by the inner chamber 124 of instrument 100, and inner chamber 124 is formed by the lower edge 126 of cylinder 40.Though being preferably pipe 102 is made of the flexiplast pipe, and sections 120 is relatively hard and be made of metal, but can consider that also sections 102,120 can be whole and by the identical materials manufacturing, both can be flexible pipe and also can be rigid pipe, and have suitable bending with suitable location that pipe is provided be connected.

Referring now to Fig. 5, there is shown the existing system of U.S. Patent No. 5558264.Instrument totally by 130 expressions, comprises the feature of a lot of instruments 10, but some be these features than older version.Yet the parts of expression similar characteristics are marked with same reference numbers so that explain.Instrument 130 is designed to be equipped with the nail casket of reeling nail casket (not shown) and being represented by cylinder 56 and drives into mechanism (Fig. 1).For mechanism provides power to driving into, pipeline 132 is connected between cylinder 56 and the cylinder 40.Pipeline 132 is positioned at the outside of instrument 130.The arrival end 134 of pipeline 132 is connected to plush copper joint 136, and plush copper joint 136 is fixed to cylinder 40 and be communicated with cylinder 40 fluids.Lay respectively at hole 138,140 in tool housing 12 and the valve pocket 38 and hold the pipeline of pipeline 132.

In operation, passage 132 makes burning gases redirect to securing member from cylinder 40 in the mode of driving feed mechanism into and driving into the securing member that will be driven by driving chip 30 to supply with and drive the suction casig 56.As mentioned above, disclosed system poor reliability when being used for typical tool operation environment in the U.S. Patent No. 5558264.In addition, found that pipeline 132 has limited and flows into securing member and supply with and drive the gas flow of suction casig 56 with respect to the stroke that drives into of the position of combustion chamber 44 and piston 34, and be the factor that reduces prior art securing member feed system reliability.

Though this paper has described the exhaust gas drive supply pipe of the present invention that is used for combustion powered fastener-driving tool; but those of skill in the art would recognize that can to its change do not depart from improving of the present invention its wideer aspect and the protection domain that in following claims, proposes.

Claims

1. a combustion formula instrument has the nail casket that gas-powered is advanced, and comprising:

The combustion chamber is by cylinder, partly form to valve pocket that moves back and forth and piston upper surface with respect to cylinder axis;

Pneumatic nail casket securing member propulsive mechanism; And

The exhaust gas drive supply pipe has second end that designs first end that is communicated with combustion chamber fluid in the hole that is used for being inserted in the cylinder and be connected to described nail casket securing member propulsive mechanism.

2. instrument according to claim 1, wherein, described first end of described pipe is connected to the combustion chamber above the described upper surface of described piston.

3. instrument according to claim 1 also comprises housing, and wherein said pipe is positioned at described housing.

4. instrument according to claim 1, wherein, described first end of described pipe tilts with respect to vertical tubular axis.

5. instrument according to claim 4, wherein, described pipe comprises sleeve part, axially contiguous described first end of described sleeve part, and be designed to be arranged between cylinder outside and the valve pocket inside, so that valve pocket freely moves back and forth with respect to cylinder.

6. instrument according to claim 5 also comprises exhaust portion, its axially contiguous described sleeve part, and the air bleeding valve of the instrument of centering on forms common C shape.

7. instrument according to claim 6 also comprises drive division, and its axially contiguous described discharge portion also is designed to be communicated with exhaust gas drive nail casket securing member propulsive mechanism fluid.

8. instrument according to claim 7, wherein, described drive division ends at second end of described pipe, with described first and described second end at least one be fixed in hermetically in the described instrument with chemical bonding agent.

9. instrument according to claim 1, wherein, described pipe is arranged in the described instrument and need not tool using.

10. instrument according to claim 1, wherein, described pipe is arranged in the described instrument, and does not have at least a in plush copper joint, knuckle sub and the screw thread coupling.

11. instrument according to claim 1, wherein, described blast pipe has volume, and described volume is in about 0.25% to 1.05% scope of engine displacement.

12. an exhaust gas drive pipe is used to fire the formula instrument, combustion formula instrument have by cylinder and with respect to cylinder axis to the combustion chamber that the valve pocket that moves back and forth partly forms, combustion formula instrument also has pneumatic nail casket securing member propulsive mechanism, described pipe comprises:

First end, the Kong Zhongyu combustion chamber fluid that is used for inserting in the cylinder with respect to vertical axis tilt and design is communicated with;

Sleeve part, axially contiguous described first end, and design is used for being arranged between cylinder outside and the valve pocket inside, so that valve pocket freely moves back and forth with respect to cylinder;

Exhaust portion, axially contiguous described sleeve part, and the air bleeding valve of this instrument of centering on forms common C shape; And

Drive division, axially contiguous described exhaust portion, and design is used for and follows closely casket securing member propulsive mechanism fluid and be communicated with.

13. pipe according to claim 12, wherein, described pipe is designed to described at least first end, described sleeve part and described exhaust portion and is positioned at this instrument.

14. pipe according to claim 13, wherein, described drive division is designed to be located substantially in this instrument.

15. pipe according to claim 11 also comprises chemical sealant, is used for hermetically described at least first end being fixed to cylinder.

16. pipe according to claim 12, wherein, described pipe is designed to arrange and is fixed in this instrument and need not tool using.

17. pipe according to claim 12, wherein, described pipe is designed to arrange and is fixed in the instrument and need not to use plush copper joint, ell or screw thread coupling.

18. pipe according to claim 12, wherein, described first end is in tilted layout with about 10 ° with respect to described sleeve part.

19. pipe according to claim 12, wherein, described exhaust portion comprises the main sections that is parallel to described sleeve part usually and has two ends, and each described end is made fillet, so that the transition to corresponding sleeve and drive division to be provided.

20. a combustion formula instrument has the nail casket that gas-powered is advanced, and comprising:

The combustion chamber, by cylinder, partly form to valve pocket that moves back and forth and piston upper surface with respect to cylinder axis, described cylinder has the lower end;

Pneumatic nail casket securing member propulsive mechanism; And

The gas-powered supply pipe has second end that design is used for being inserted into first end in the hole in the described lower end of described cylinder and is connected to described nail casket securing member propulsive mechanism.