DE1750514A1 - Machine wedge fitted with a suit - Google Patents

Description

Rudolf Busselmeier

Patent attorney Augsburg · Rehlingenetraße β Augsburg, May 8, 1968 Peit »*« kkonto: Münehtn Nr.745 »,„ / · _

Priority: USA, 11. Max 19Ö7 499V03 Th / Em. Ser.No. 637 »^ 7

Patent registration

Robert Rex Downie, 3328 College Avenue, Beaver Falls, Pennsylvania, I5OIO, USA

"Machine wedge fitted with a suit"

The invention relates to one with. Suit-provided, polygonal machine wedge for securing and wedging two machine parts that are mutually exclusive Have touching surfaces and keyways.

The usual standard wedge, whether straight or suitably fitted, does not sit tightly enough, even if it has been fitted well, and it is not pressed evenly on its lateral surfaces where it has to bear the load. For this reason, he soon starts working under heavy alternating loads. This defect occurs even if it has been fitted in perfectly. The disadvantage of the known standard wedge with a square or rectangular cross section is based on the fact that the pressures acting on the wedge cannot be compensated by the latter. This is because it has three mutually independent pairings of six essential "touch" or "Preset" surfaces:

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1. The radial surfaces, i.e. the surfaces between the keyway bottoms of the two Keyways, with a strong and secure pressure when driven or wedge fitted with a suit,

2. The areas between two walls of the shaft keyway, with only minor ones and insecure pressure,

3. the areas between two walls of the

■ Hub keyway where printing is just as easy and unsafe.

Since the pressure cannot be equalized with the help of the standard wedge, the pressure on part of the Wedge can be very strong while another part of the wedge is not bearing.

The keyways for rectangular wedges made with the usual tools also have walls with only rough to average quality grade. These not completely flat walls make you feel steady and permanent firm contact between the key and the keyway only. possible under heavy pressure.

The manufacturing inaccuracies that result from the size deviations of the cutting tools for the keyways from the prescribed dimension, as well as the fact that the keyways in the shaft and hub are machined by different tools, increase the disadvantages of a standard key

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already cling to.

A hexagonal machine wedge fitted with a suit has also been proposed - the Has the shape of a regular hexagonal truncated pyramid. Such a wedge cannot, if necessary to fit into a shaft keyway of uniform depth and width.

It was also proposed a wedge of a lower part with three parallel in the longitudinal direction Edges and consists of a curved upper part firmly connected to it. A safe real jamming however, the curved wedge surface in the associated keyway surface is impossible, as shown in FIG Drawing will be shown later.

The object of the invention is to overcome the disadvantages of the known machine wedges described above to avoid and create a machine wedge that will jam firmly and securely allows two machine parts, with the wedging not even under heavy alternating loads should loosen.

This object is achieved in the machine wedge according to the invention in that it has two opposite sides has two mutually inclined planar surfaces, of each of which has the two surfaces located on one side with one of the machine parts in the plane Make pressure contact with the surfaces on the other side with the other

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The machine part is in level pressure contact.

The invention also proposes that the machine wedge have a flat surface on its upper side and has another flat surface on its underside which, when viewed from the side, is shown in Are inclined in the longitudinal direction at a slight angle to each other, furthermore two at least approximately vertical and parallel side surfaces unit to the pressure surfaces comparatively small areas that are arranged between two printing areas.

The deformation and wear of key and keyway surfaces are avoided or at least largely reduced in the machine wedge according to the invention by prestressing the load-bearing surfaces that absorb the combined loads. It is this the tangentialc working in two directions the load resulting from the driving force and the lower, radially directed load that is not is so essential and holds the hub against misalignment in the axial direction. When the invention Machine wedge is an equalization or distribution of all surface pressures acting at the beginning Part of its principle. When driving in irregularities in the surface and / or Depth and width deviations in the wedge itself or in one of the two keyways compensated. A loss of contact pressure that results from a gradual adjustment of the surfaces during their loading

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can arise, can be completely compensated by driving the wedge further and thus is set more firmly again.

The initial normal force on each of the four load-bearing surfaces can be a combination or Resultant of two basic forces, namely one radial and one tangential, can be considered. The latter has the same direction and the same point of attack (or surface) as the force acting on the machine wedge according to the invention during the activity of the machine acting forces balance each other out.

The theory and the shown and described embodiment show that a driving force on a given surface, of either the same or alternating direction of rotation and of a size that is less than the initial pressure, never the differential pressure of the corresponding unloaded surface, that of the pressurized surface approximated opposite, can completely degrade. This is because a relative sliding movement and a relative rotational movement of the wedge (about its own axis) are prevented because of the preload . In this way , a firm and at the same time double-directional strength of the wedged components is achieved. The strength is reached up to or almost up to the yield point of the wedge and in this way prevents the wedging from being destroyed by forces that are only minor

/ Fraction of the real ' / ■ shear force and

'109809 / ΟΪ87 - - - 6 -

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thus avoids the disadvantages of known standard wedges.

The preload does not reduce or limit in any Way, the net usable power transmission capacity of the wedge. The static or preload forces that Form a balanced system, do not exert any shear force on the wedge, only compressive forces. Only when the surrounding equalization pressure is reduced on one side of the wedge does it occur such a real shear force, and this can only be from relative displacement forces in the wedged components.

The invention further suggests that the keyway in one of the machine parts have three surfaces of the key and is in pressure contact with two of these three surfaces, the keyway in the other machine part encloses five surfaces of the machine wedge and with two of these five Surfaces in pressure contact '.

The invention further proposes that the six surfaces of the machine wedge have uniform widths at least over a substantial part of its length of engagement .

Further properties and features are described in the claims *

Now to the drawings, in which reference letters are used to identify components in general, numbers are used to identify specific points, lines, areas or districts and where j

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all wedge suit swinlc el are exaggerated to to improve the clarity:

Fig. 1 shows a side view of a machine wedge without a head (nose) according to the invention with triangular or transition surfaces its sides and adjacent parts one elaborated for the use of the wedge Wave;

Fig. 2 shows an end view of the wedge according to Fig.l at the left, larger end;

3 is an enlarged view of the wedge

according to Fig. 1 in the view from the right at the "smaller end along the line 3-3 in Fig. 1; ■

Figure k is a top plan view of the key and shaft keyway of Figure 1;

Fig. 5 is a side view of a nose wedge according to the invention, but without triangular ones Transition surfaces on the sides, as shown in Fig. 1;

6 is a left end view of FIG.

Figure 7 is an enlarged view of the wedge of Figure 5 from the smaller, right-hand end;

FIG. 8 is a top plan view of the key and keyway shown in FIG. 55

Fig. 9 is a side view of a wedge according to the invention, but essentially square cross-section;

Fig. 10 is an end view from the left, i.e., the major end of the wedge of Fig. 9;

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11 is an enlarged end view of the right or smaller end of the wedge according to FIG. 9;

Figure 12 is a top plan view of the key and keyway in the shaft of Figure 9;

13 is a view of a crank arm provided with another embodiment of the machine wedge design according to the invention; ,

Figure Ik is a side view of the parts shown in Figure I3;

15 is an enlarged view of the block wedge according to Fig. I3 and l'i;

Fig. 16 is a side view with a wedge according to the invention showing in combination certain optional features, for example a shim or washer for wedge setting;

Fig. 17 is a right side view showing the wedge and the enlarged view Enclosure according to FIG. L6;

Fig. 18 is a top plan view of the wedge and shim of Fig. 16 with an outline of a portion of those made by milling Keyway;

19 schematically shows the result, which with a wedge with curved pressure surfaces, as is known in the prior art, is achievable.

Fig. 20 shows schematically the result obtained with a wedge with flat pressure surfaces such as

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is achievable in the present invention.

1 to 12 and 16 to 18 show the use of the wedge according to the invention in various adapted combinations of features for securing machine components which have cylindrical contact surfaces. Fig. IJ ₁ 14 and I5 show a design of the wedge for holding components with flat contact surfaces.

In the embodiment according to FIGS the wedge A has an upper surface 1 and a lower surface 2. Surfaces 1 and 2 are c-

flat as shown and the upper surface slopes or tapers towards the lower surface 2 at the end of the wedge. Upwardly converging flat side surfaces 3 cooperate with corresponding surfaces in a keyway of the hub C, while downwardly converging flat side surfaces 4 cooperate with the shaft B on inclined walls 6, which are shown in FIG. Lateral triangular, vertical and flat surfaces 5 of the wedge A are parallel and extend in the longitudinal direction of the wedge. They are a short distance from. the corresponding surfaces 25 of the hub keyway (see. Fig. 3). The keyway bottom 7 of the shaft B and the keyway bottom 8 of the hub C are well spaced from the top and bottom surfaces 1 and key · A; so only the four side surfaces 3 and k of the key are in contact with the keyways. Arch 9 (see, Fig. 2 and 3) is the outline

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the outer wave surface. The narrow flat shoulders or recessed surfaces 10 formed on the sides of the shaft keyway lower the real lip line of the shaft from its normal position 2k to the level of the shoulder. The transition surface (vertical side surface) of Koil A accordingly extends down to the shoulder level. This feature of the shoulder or recess can be selected and can also be used in the kniles according to FIGS. 5 to 8, 9 to 12 and 16 to 18. Its advantages are twofold: ■

1. Reinforcement of the flank of the keyway lip and the wall itself, even above the basic Strength enhancement, resulting from the wedge shape, out and

2. the provision of a small space of suitable shape for the adaptation of a lip curvature in the case of very high loads on the wedge.

In this way, a pressing of the shaft groove lip against the bore groove lip and the resulting difficulties in dismantling, which result from the clamping of the shaft in the hub, avoided. '

In the nose wedge D of FIGS. 5 to 8, the upper surfaces 11 and the lower surfaces

12 all flat, as well as the upper pair of pressure surfaces

13 and the lower pair of pressure surfaces Ik _x arch 21

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denotes the outer surface of the shaft E and F represents the hub. A nose or head piece 6 with a surface 15 can be welded by arc welding or resistance clipping onto a surface of the wedge body in order to facilitate its extraction in the usual manner for nose wedges. In this wedge, which can be cut from a regular hexagonal bar stock, the surfaces I3 intersect directly with the surfaces I ¹ I along the line 20. Each; Intersection line 20, as shown in FIG. 5, is inclined downwardly with respect to the lip line of the shaft keyway 17. The end or tail of the inclination of the upper three surfaces I3i H is shown at 23. The bottom three

After- 'surfaces Ik ₁ 12, 1 * 1 can be used without Z processing

are/
as they are cut / .. Line 20 can be located completely above or completely below lip line I7; however, in order to keep the gaps as small as possible and to divide them up, line 20 is here ao. arranged "that it intersects the lip line 17 approximately at half the wedge body. This arrangement has two small spaces 19-19 (see Fig. 7) on both sides of the wedge at the larger end of the wedge in the keyway and 18 -18 in the shaft keyway at the smaller end of the key.

In the wedge H according to FIGS. 9 to 12, the upper pressure surfaces 28 run at a right angle Vertices 26 together, lower surfaces 29 run similarly in the subline 27 together. Elongated, triangular connecting surfaces change on the sides 30 the substantially square cross-section of the

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Wedge. The surfaces 30 are flat and parallel. The outline, the purpose, the spaces and options with regard to the arrangement of these side surfaces opposite the lip line Jl of the shaft keyway 33 are essentially similar to the case of the wedge A (see. Fig. 1 to k) and therefore need not be described again to become. The doge J2 (cf. Figs. 10 and 11) is the contour line of the shaft J, while K denotes the hub. When using this embodiment of the wedge, it is recommended as a practical matter that the pressure surfaces do not run out in a literally sharp edge. Both the strength of the hub and the maintenance of the key and the keyway making tools are greatly served with a small rounding or flat surface at these points, with the key being kept a little distance from the keyway to prevent improper wearing of the key when driving and can be safe during operation.

In the wedge according to FIGS. I3 to I5 is the shape of the wedge L is essentially the same as in the wedge of FIG. 1, apart from the relative Length and therefore does not need to be described again. The distances are the same or proportional. The plane 'il that wedged in touch with the crank arm S and the block R and to the curved surfaces of the shafts in the corresponds to other constructions, intersects at their edges with the keyway pressure surfaces in the Crank arm S. Alternatively possible Koilnut arrangementou 36, 37 and 3 ^ are shown, which slide dos block R and the pin of a reciprocating

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Rod Q in a recess of the arm S and therefore at an angle with respect to the shaft P, allow and on relocate the swing or oscillation range of the crank arm S and the shaft P in this way. One Pocket 40 is accidentally formed at the bottom of the recess as the keyways are milled in the wall. A Extension 43 of the wedge body L passes through one of three holes 391 which are in line with the keyways are drilled. This part of the wedge body carries a compression spring M, which is inserted in a counterbore (support bore) can be supported on the back of the crank arm S. The nuts N that are at the end of the wedge process 43 are screwed on, are rotated so far, until they generate full and some reserve spring pressure and wedge tension and then secured. If the initial good fit of the wedge L decreases in the course of the activity, as a result of the If the surface rests against or settles, occasional heavy overloading or springing of the parts, then bumps the compressive force of the spring M moves the wedge into a tighter fit and prevents play from developing. This alignment is done automatically while the machine is running, without observation and independently of the disregard of those working on it.

In the construction according to FIGS. 16, 1? and iß, which lateral transition area p (as in '/ x';,'. .1 mi *: the direct lateral overlap <Ur, r' ■ '. ■ - ■>'. ■■ eh eil (as xr.? ' i g, 5) combined> bü ^ eith :. ■. '.'. - ~ <'■ < i. 1. iTiit ijbö.rv'·;un'i unt errm Ober f lac Ii t- ■. ■ 7 ■

iat in a wall U mont :! place i, ma;.:. c ':

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Position held by a Bailagestück V, which is drawn broken off at its front end. the Enclosure can be either connected or built in layers. The thickness of a single surface at " location is shown here exaggerated to achieve a

better clarity. The upper and lower pairs of pressure surfaces 5 ² and 53 are connected at a rear part of their length by lateral transition surfaces 5k (see. Fig. 16), of which the inclined line 55 is the upper edge and 65 is the lower, the latter in the plane of the lip line of the wave. keyway lies. The dashed line 56 serves as a reference and lies at the end point of the transition surface 5k. The line 57t, which runs from 56 to the end of the wedge, is the direct line of intersection of the surfaces 52 and 53. It is neither in line with nor with 65 and, as can be seen in FIG. 18, it jumps somewhat from the Level of the transition surface 5k back. Point 58 (cf. FIG. I7) represents the intersection ^; of the arc 63 »the contour line of the wave surface, with face 52 at the front end of the wedge. A small space 59 is a gap resulting from the drop of line 57 below the plane of the lip line. This gap slopes backwards along the wedge to a point on line 56. The dashed line "; oil are continuations of the lower flank surface, which intersect with the axis of the part U at point 60. The wall of the shaft keyway is shown at 62. The dashed line 6k is used to denote ai-j tieüugs line, ψύ ziuB jfwi, -icVienlMnge of the wedge.

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This construction shows four things:

A method of designing this general type of wedge with a practical goal connects, which consists in a wedge system. to .design with a relatively large area of bar lengths; ',

a small base height of the wedge than those in the previous figures j

the arrangement of lower flank surfaces in an approximately radial position to the shaft;

finally, the use of side dishes.

FIGS. 19 and 20 show very schematically characterizing the differences between a wedge with a curved pressure surface as in Fig. 19 and a Wedge which has flat surfaces as in Fig. 20. The curved pressure surfaces are e.g. in the ÜS patent 267 ^ 68 mentioned, where, however, flat pressure surfaces as in Fig. 20 agree with the teaching of the present invention.

In FIG. 19, a wedge with curved pressure surfaces 70 and 71 and the flat unloaded surface 72 is shown seated in the shaft keyway 73. The gap between the pressure surfaces 70 and "] \ of the wedge and the associated pressure surfaces 7 ^ and 75 of the keyway 73 is significantly exaggerated for the sake of clarity. In FIG · The corresponding opposing pressure surfaces of the keyway j are designated 79 and 80, respectively.

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Again, the distance between opposing printing surfaces is for the sake of clarity exaggerated. In either case, i.e. in both Figures 19 and 20, the driving of the wedge will result -in the keyways to forces between. wedge and Hub keyway pressure surfaces applied in one direction which is perpendicular to the touching 'surfaces of the shaft and hub and. through the middle plane of the wedge runs. .

Referring first to Fig. 20, it is readily apparent that driving the key into the keyway results in a uniform pressure on the opposite pairs of printing surfaces, because of the same distances between the opposing printing surfaces arises in the effective direction of the movement of the wedge. In other words, the distances d .., d_, d_ and d · are all the same so that the driving of the wedge results in uniform contact between opposing Leads printing areas over the entire surface.

In contrast, it is easy to see from Fig. 19, that the limitation of the wedge movement relative to the keyway is determined by the distances, d, - and d is. When these are reduced to zero, the key will be in close, firm contact with the keyway. At the same time, however, the pressure surfaces of the wedge are not in uniform contact with the The pressure surfaces of the hub keyway lie because the distances d_ and do are significantly larger than d <- and d_ and so next to each lip of the wedge according to Fig. 19

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a gap remain. It is therefore impossible to ensure a real pre-coil effect of the wedge if, as in FIG. 1 _{f, it has} pressure surfaces which are not flat. '"-

Examples of changes that are considered to be within the scope of the invention are e.g .: deeper storage of the wedge in one machine part than in the other, in order to ensure the uniform Pressure in a part which is from. made of softer material than the other. to decrease; Use of other than shown here confluence angles of the active surfaces, so that one on this way the relative size of the radial and tangential components of the forces on the effective surfaces of the wedge varies; other changes in the width-to-height ratio of the The wedge, the tightening or clamping angle and the shape of the wedge nose. ·

- patent claims -

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Claims (12)

Claim: ■ 1. A suit-equipped polygonal machine corner for securing and wedging two machine tools. parts that have mutually contacting surfaces and keyways avif, characterized geke η η characterized in that it has two mutually inclined flat surfaces (3} ^) on opposite sides, of which the two surfaces (3) located on one side with one (C). of the machine parts are in plane pressure contact, whereby 'the surfaces (k) on the other side with the other machine (B)
part / are in level pressure contact. 2. Machine wedge according to claim 1, characterized in that g e k e η η-draws, that he has a flat surface (l) on its top-e and another flat surface (2) has on its underside which, seen from the side, in the longitudinal direction at a slight angle are inclined to each other, furthermore two at least approximately vertical and parallel side surfaces (5) with comparatively small to the printing areas (3 »^) Areas which 'between each two pressure areas (3t Ό are arranged. 3. Arrangement of the machine wedge according to claim 1 and / or 2 in two machine parts with keyways, characterized in that the keyway in one (C) of the machine parts encloses three surfaces (3 »l) of the wedge and with two (3) of these three 10980970? 6i7 - 19 - Th / Em - 19 -: May 8, 1968 Surfaces in pressure contact, the keyway in the other machine part (B) _{enclosing five surfaces (5i ^ t} 2,4,5) of the machine wedge and being in pressure contact with two (4) of these five surfaces. '....' 4 »Machine wedge according to one or more of the claims 1 to 3, thereby g e k e η η ζ ei c h η e t that the six surfaces (3,1,3,5,4,2,4) uniform widths at least over a substantial part of the Have the length of engagement of the wedge (A). 5 · Machine wedge according to one or more of the claims 1 to 4 _{f marked} by the fact that it has eight longitudinally extending flat surfaces (1, 3, 5, 4, 2, 4, 5t 3), six of which (1,3,4 , 2,4,3) have parallel edges over at least part of their respective length and wherein two surfaces (5) on opposite sides of the wedge run parallel to one another and have longitudinally extending edges which converge. . 6. Machine wedge according to one or more of the claims 1 to 5 »by the fact that the two side surfaces (5). lie in planes, the the levels of the two up (3) and the two Cut downwardly inclined surfaces (4) in straight lines. - 20 - BAD ORlGlNAt ■ ■ .175Q5H Λ99Ί / Ο3 Th / Era - 20 - May 8 19.68 7 ♦ Machine wedge according to one or more of claims 1 to 6, characterized in that it has real wedge conicity, which extends into each of the two machine parts, with flat surfaces (1, 2) on the top (1). And bottom (2 ) of the wedge (A) are provided and each of the wedge conicities ends in one of the two flat surfaces (1,2), the longitudinal edges of each of the two flat surfaces running parallel to one another and the pressure contact surfaces (3, Ό between the machine wedge (A) and the machine _{parts (B 1} C) are completely flat and wear real and evenly. 8. Arrangement of a machine wedge according to one or more of claims 1 to 7 in two machine parts with keyways, characterized in that a shim (V) between one of the pressure contact surfaces (53) of the machine key and the corresponding keyway surface (62) is provided, wherein all pressure surfaces (52,53) a uniform Have pressure. 9 · Machine wedge according to one or more of the claims 1 to 8, characterized in that the machine wedge (L) has an extension (43), which protrudes over one end of the machine wedge and _j. connected to its end, further means (M, N), CO carried by the appendage (O) and in 00 ^ one (S) of the machine parts (R, S) engage, where CO O ₁ these means automatically exert a pressure in the longitudinal direction O> of the machine wedge and the projection, in the way that the machine coil opposite the machine parts is fixed. BAD ORfälNAL - 91 _ ^/ ΐ995 / Ό3 'Th / Ern - 21 - β . May 1968 10. Arrangement of a machine wedge according to claim 9 in two machine parts with keyways, characterized g e ke η η ζ e ic bin et that these means ^; consist of a helical spring (M), an adjusting nut (N) being arranged on one end of the extension (hy), which is used to compress the helical spring and presses against one (S) of the machine parts with an adjustable force. 11, machine wedge according to one or more of the claims 1 to 10, thus g e k e η η ζ e i c h η e t, that it (H) has a pair of upper pressure surfaces (28) which are at right angles in the apex (26) converge, furthermore a pair of lower ones Pressure areas (29) that are in the lower line (27) in converge at a right angle, and elongated triangular ones on opposite sides . Areas (30) each of which has two pressure areas / (28.29) on their side * connects. 12. The arrangement of the machine wedge according to one or more of claims 1 to 11, in a shaft with a hole encompassing the shaft, thereby ge -ke η η ζ eich η et that the shaft (E) stungsb er e I e two narrow relief which run outside, Zttbeicteh sides, adjacent and parallel with: eier V / «i lehke ilhut, so that aicheiti .Riunu,:! Iß) • / ■ ο «'■ ina'i-lirliclioi- .radial depth results,"<i «r« is-h, Wi- ^'(ίΛίί'ΐι -.fdii i-fi- "Ab <: - i - '' Uhi .! at l.-rt ^ iiu-iitifjbi-rw-j "^ hV-. Ma-X ύέ -.-. Γ .- ■ '■ ■ ·. · ■ 1 VbUb-I A Th / Em - 22 - May 8, 1968 13 · Arrangement of a machine wedge after one or more! of claims 1 to 12 in two machine parts with Ii grooves, characterized in that each keyway has a non-pressurized base surface (7, S) with parallel edges, which extends transversely through -i3 i central plane of the wedge, furthermore two longitudinally parallel, flat pressure surfaces (6,6a) which each unite with the keyway base surface (1,2) in one of their parallel longitudinal edges and diverge at equal angles relative to the central plane of the key in the direction of the opposite keyway, the two shaft keyway pressure surfaces (6 ) are each substantially equal in width along their length and have upper edges on the surface of the shaft (B) consisting of parallel lines each located on opposite sides of the central plane of the key, the pressure surfaces (6a) and the keyway base (l) the natural keyway all longitudinally at a specified angle relative to the plane passing through h the two parallel lines are determined, are inclined and the pressure surfaces of the wedge (A) are inclined to each other at the same angles as the corresponding pressure surfaces (6 or 6a) of the Wolleri keyway or the hub keyway, whereby the pressure surfaces (h) us wedge (Ai, dJMJ.mit .the pressure surfaces (6) of W.illenkei 1 with correspond, as well as the under "pressure load" surface {■ _ ',) dos Kt-i I> in I η, direction parallel to t. π l.fiiHi [Ku, .1 i i>] -ii ij.fi ϊ η ί ι> -:, w-uui Λΐ- · ι 1 .. 'i I ^.: . <; » ia · ν;, -. · » BATH ORIGINAL '4994/03 Th / Em \ - 23 - 8 ". May. I968 pair (3) »the one with the pressure surfaces (6a) of the hub keyway corresponds, as does the upper unpressurized surface (1) of the wedge in the longitudinal direction. inclines at a certain angle relative to the two parallel lines, the opposing unpressurized surfaces (i, 2; 7,8) of both the key and the keyways (7,8) are arranged in such a way that an equal distance in the longitudinal direction over the entire length of the wedge, remains between the opposite pressureless surfaces. 14, arrangement according to claim 13, characterized in that each pressure surface of a pressure surface _{pair (13) intersects a corresponding pressure surface f of} the other pair (l4 :) in a straight line (20), the one Forms the longitudinal edge of the wedge. 15 · Arrangement according to claims 13 and / or 14, thereby g e k e η η ζ e i c h η e t that the pressure surfaces (62) of the keyway in the shaft (U) both essentially borrowed parallel to the radii (6l) of the shaft (ü). l6. Arrangement according to one or more of the preceding claims, characterized ge ken η ζ e ich η e t, that the unpressurized flat surface (7,8) of each keyway is substantially perpendicular to the median plane of the wedge or <of the wedge runs. 10 980 9 / O ¹ ? 67 Lee r side