DE2030715A1 - Impact clutch mechanism for a rotating impact device - Google Patents

Description

PATENT LAWYERS "

PATENT Attorney DIPL.-ING. R. MOLLER-BORNER PATENTANWALT D I P L. -1 N G. HANS-H. WEY

BE RLI N-DAHLEM 33. POD BI ELS KIALLE E «8 8 M D N C H E N 22 · Wl D E N MAYE R STRAS SE 49

TEL. 0311 .762907-TELEGR. PROPINDUS. TELEX 0184 057 TEL. 0811 ■ 225585. TELEGR. PROPINDUS .TELEX 0524244

23

INGERSOLL-RAND COMPANY New York, N.Y. (UNITED STATES.)

Schlagkupplungsaechanisoius for a «rotating Impact device

The invention relates to an impact coupling leakage for a rotating impact device

A known impact device, such as is used for example for impact wrench, comprises an N- Schlagkuppiungauechanlsaus, use or in a Hawser, hereinafter referred nachs sharing mn racket in a Schlägergeh & girders swings (US Patent 2,718,803). The Hamtaertruger consists of a single casting, which includes a pair of axially spaced end plates, which are rigidly connected to one another by means of a length stiffener. The casting is expensive and fragile. It can be assumed that they often. on-

009882/1582

BATH ORIGINAL

Occurring fractures are a result of uneven loading applied by the bat during the blow to the casting be transmitted.

The task on which the invention is based is to prevent or at least to prevent the fractures that occur reduce, namely by a new hammer carrier, which the previously common casting replaced and an automatic one Alignment of the club during the stroke allows without placing undue stress on the shark carrier be transferred, at the same time a new one Impact clutch mechanism for the device mentioned at the beginning is created "

The solution to the problem arises, according to the invention, by a hammer carrier, which has two separate, axially spaced apart. Plates, which are connected by JElenent®, which in turn allow a slight swing of the racket on its axis in such a way that the racket aligns itself automatically when it hits the "impact-absorbing impact" piece, otaie that t £ m «rwümscb.t · ia © feo transferred to the hammer carrier.« «In the example, the pivoting bolster for amn racket & n« mag «» »aligned holes in the plates« © rdmet mad the «» inasig «» part , which connects the plates for g9m & ± nm »m» rotation · This pivot bolt, also al · Hanaeratift net, is relatively loose · in d®m- Bokrnasen maiceordsii (»t“ so that the spaced apart asagoonslaotoa plates are slightly and relative to «inayii <ä <» r -7er <lr «i & ®m kSsnua,» whereby the bat is slightly affected by its Äekee «@kw» i & k «n

009882 / 1S62

A preferred embodiment example for a percussion coupling see chanisraus according to the invention provides a percussion piece old before a percussion pin which is rotatable about a percussion piece axis and drives a fastening element; a hammer that can be rotated over the hammer axis with two axially spaced apart hammer plates that can be rotated about the hammer axis, with a pivot axis extending between the hammer plates and. is offset to the hammer axis and with a beater, the swivel elements connecting to the hammer plates alternately around the swivel axis a flapping position and a neutral position swings; and with fasteners that hold the hammer plates resiliently connect for smooth rotation and include the pivot members and with the hammer plates and the connecting elements allow the pivot axis to pivot slightly relative to the hammer axis, to allow the racket to align automatically during the To allow impact on the hammer without transferring destructive loads to the hammer «

In a further embodiment of the invention, in the case of an impact coupling mechanism, a planar type is provided in advance, that the racket with its pivot element is the only connection between the hammer plates. The swivel element is preferably a hammer pin, around whose axis the bat swings · that of the invention is particularly advantageous underlying object is achieved in that the hammer pin • by means of a sliding seat and an axial pivot the hammer pin allowing tolerances is arranged in bores of the hammer plates.

006882/1662

BATH

-Zf-

In the accompanying drawings is an exemplary embodiment for the clutch mechanism according to the invention shown schematically. Show Bs *

1 shows a section through an impact tool provided with the coupling according to the invention;

Fig. 2 is an exploded perspective view the clutch mechanism;

Fig. 3 is a section along line 3-3 in Fig. 1;

FIG. K shows a section similar to that according to FIG. 3, the coupling mechanism being shown in a different position; and

Fig. 5 is a section similar to Denes, in Figs. 3 and 4, where the coupling mechanism snstis the moment a stroke execution is shown.

The impact tool shown in Fig. 1 is an impact wrench 1 with a housing 2, a Pis & ol © »handle 3 and a front housing part 4 · The pistol grip 3 ent holds a hose nip »! 5 cumulative connection © ia © a jaielit shown Compressed air hoses from the SeiilagwarksoMg and a trigger 6, the ~ ¥ «nt ± i 7 swü Stvmora do-s pneu« static working medium »actuated. Bio in present Brwcklmft supplied to it * iaa> a Ltaftiaotor 8 eit «ine? Drive shaft 9 aau Si® Je triebawe11 © "9-iet Bit .einer Spim del 10 over a ScklagmttGhaaiaiatte 11 sekwppüllen, Di

0 09882/1562

del 10 is designed at its front end so that Attachments, not shown, for tightening different sizes of fasteners, for example Screw nuts, can be attached. The structure of the impact tool described above is conventional.

The striking mechanism 11 consists of a striking piece 15 »J which is made in one piece with the spindle 10 and rotates on the axis of the striking mechanism. The hammer 15 has a hammer 16 which extends radially from the hammer 15. The striking pin 16 has the shape of a fan-like segment of a circle and is equipped with two striking shoulders 17 extending radially at an angle. The hammer 15 is rotatably mounted at its front end in a bearing 18 which is arranged in the housing part h. The rear end of the hammer 15 is rotatably supported in a driver 20 which is connected to the drive shaft 9 by means of teeth.

A hammer 21 rotates around the hammer 15 and consists of a hammer carrier 22, which consists of a pair of hammer plates and 24 arranged at an axial distance from one another. The rear hammer plate 23 is rotatable on the driver 20, the front Hammerplatt® Zh is rotatably arranged on the hammer 15. Both hammer plates 23 and Zh are connected to one another by a hammer pin 25 which is slidably arranged in aligned bores 26 which extend through the two hams 23 and Zh , or hammer pin 25 is that

009 88 2/1562 bad original

Part which causes a gradual rotation of the two Hanner plates 23 and Zk , e.g. B. these are not rigidly connected to one another by other sienente. The tolerance between the hammer pin 25 and the bores 26 can vary between 0.025 nn (0.001 inch) and 0.125 nn (0.005 inch). Thus, the hammer pin 25 "is provided in a sliding fit, the tolerance of which allows it to tilt slightly within the bores 26, with the Haner pin 25 being able to move slightly out of the exact parallel alignment to the axis of the baton" and the hawser 21.

Even if the Haamer pin 25 is not arranged by means of a gloite seat within the Haaterplattom 23 wmu 2k , it can be assumed that the two Hasmaer plates 23 and Zk can rotate relatively to an extent that would allow slight self-alignment of the Hannerstift 25 relative to the hammer axis "This results from the relatively flexible connection of the two Hammor plates 23 and Zk by the Hanmer pin 25" In addition, it can hardly be assumed that the Hatnaer plates 23 and Zk are connected more than one Hannerstift can and still slightly relative to each other xu are able to rotate and ssittelo the invention amg @ 3tr © btöa Zw®ck damit'den reach. In other words i @ t gotaüß the Erfiadissag · provided that the Hanaerträ © r SS to ξϊ / ο! In distance from each other arranged Hasaerplattom S3 w & a Zk which "allow r ± m © © e ia extent" by Elememte m ± to ± m®naor verbuuaäem aind _e relative Retierea the plates · zui @ iaius <i -

0093S2 / 1S62

A hammer 28 is rotatably arranged on the hammer pin 25 and has a pair of striking surfaces 29 which are arranged and designed so that they are in the area of the striking pin 16 and with this periodically in Contact come when the bat 28 to the hammer 15 rotates. The racket 28 carries an approach 30, which extends from its rear face and from the Driver 20 is taken. The driver 20 works with the approach 30 together to the racket 28 directly | to be brought into a position before each stroke execution, in which this from the hammer 15 is free.

Xn den. 3-5 is the operation of the racket 28 and the hammer 15 shown * Immediately after each With the impact execution, the torque of the driver 20 swings the striker 28 into the free position. Details of this Procedures are disclosed in U.S. Patent No. 2,718,803, in which case the mode of operation is not understood is referred.

By the execution of the hammer carrier 22 in the form of two j spaced apart hammer plates 23 and Zk ₉ ■ which are not rigidly connected to one another by the hammer pin 25 and the hammer pin 25 is arranged by means of a sliding fit in the hammer plates, the Has = mer plates 23 and 2k rotate by a small amount relative to each other, whereby the hammer pin 25 is given sufficient freedom by means of which it can deviate slightly from an exact parallel alignment to the axis of the hammer · It can be assumed that this slight movement of the hammer pin 25 dem Racket 28 one

009882/1562

BADOFUGlNAt.

Longitudinal displacement permitted relative to the firing pin axis, so that the impact surfaces 29 automatically align to the blow shoulders 17, occur without undue high loads the hammer plates 23 and Zk · It is therefore to be assumed that the possibility of beating plates 23 and Zk, slightly relative to each other to rotate, compared to the rigid connection of known similar impact mechanisms represents an improvement of the impact mechanism.

Another advantage, which results from the design of the hammer carrier 22 from two hammer plates 23 and Zk loosely connected to one another by means of the hammer pin, is that the hammer 28 can swing freely and without being influenced by a connecting stiffener on the hammer carrier 22, which, based on the prior art, has been an unsolved problem. As a result, the club 28 can be arranged in different shapes and sizes, which was not possible with known hammer carriers. This possibility of different shapes for the racket 28 enables the designer to better balance the striking mechanism.

Although in the above description only a single ▲ exemplary embodiment for the coupling mechanism or for the rotating percussion device of a percussion tool is explained, the new technical teaching according to the invention can can also be applied to other exemplary embodiments and modifications insofar as it is within the scope of the enclosed Claims lies.

00988 2/1562

BAD QRJQiNAL

Claims (3)

Patent claims β 1./ impact coupling mechanism for a rotating impact device, characterized by a striking piece (15) with a striker (16) which is rotatable about a striker axis and drives a fastening element; a hammer (21) rotatable about the hammer axis | is arranged with two at an axial distance from each other and Haramer plates (23> 24) rotatable about the hammer axis, with a pivot axis which extends between the hammer plates (23,24) extends and is offset to the hammer axis and with a hammer (28), which at the hammer plates connecting pivot elements around the Swivel axis alternately between a stroke position and a neutral position swings; and with connecting elements (25) which the hammer plates (23,24) connect resiliently for smooth rotation and enclose the pivot elements and wherein the hammer plates (23,24) and the connecting elements pivot the pivot axis slightly relative to the hammer " allow axis to the racket (28) an automatic Alignment while hitting the hammer (16) without transferring destructive loads to the hammer (21) * 2. Impact clutch mechanism according to claim 1, characterized in that the bat (28) with «a pivot element (25) is the only connection between the Hannerplattan (23» 24). „■ _Λ ORIGINAL BATHROOM 009882/1562 3. Impact clutch mechanism according to claims 1 and 2, characterized in that the pivot learning t a Hanaerstift (25) is around whose axis the bat (28) swings. k » Impact clutch mechanism according to claims 1 to 3 »characterized in that the Haonerstift (25) means of a sliding fit and an axial pivoting of the Haamer pin allowing tolerances in bores (26) of the hammer plates (23,24) is arranged 009882/1562