DE1979995U - REVERSIBLE TOOTHED LATCH DERAILLEUR. - Google Patents

Description

ΗΑ.δ6έ276.22.1ί.δ7

Dipl.-Ing. R. H. Bahr «I.

. 469 Herne, the **

" Dipl.-PnyS. E. BetZier Frelllgrathstrasse 19 P.O. Box 140

Dipl.-Ing. W. Herrmann-Trentepohl Telephone: η θ , η e 5 09 30 and 515 62

j PATENTANWÄLTE TeIeX _08229853

^Γ "" ^New address; of the Munich

New address: BüroS

New address:

8000 Munich 25, Eisenacher Strasse 17 Tel .: 398011, 39 8012, 398013 Telex: 0524562

• is: This underground (description and Sohutior.4prJ isf <ila last submitted; ₅ , e deviates from the «te __; -

, the originally submitted Ur, ur: o ,, n o'r D! j roc! .tHo: »Bo *» ulung of the change is not pnH. _A ct no. AH 378 .Alm originally submitted documents I-.:..- '-, ».: H ö, n Ainbofeton. You can ■ please state the country of origin in _{the answer} without further confirmation

real information free of charge ■ »! .. gto *.«., wad.n. On request, photocopies or filings can also be made

«At the usual prices. German Patent Office. Usage must-have.

PAOOM iyLAJJÜFAOTUEE 3 ¹ HAUOAISB D ¹ OUiIIlAG-E, Avenue de la Pierre frite, VITjTjBMETJVE-TjE-ROI (üeine), France

"Reversible toothed ratchet bracket"

The innovation relates to reversible, toothed ratchet mechanisms and relates in particular to known such ratchet mechanisms with an annular driver head, in the cavity of which the toothed pawl is arranged, which is supported by contact surfaces on the centrally mounted rotor and whose switching direction is determined by a single peder via assigned stops.

Such a ratchet mechanism is created by the! compared to the known constructions of this

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Kind by much simplified ksmkxxsxxxbui, - further, there practically none of its parts is at risk of wear long lifespan and, furthermore, extraordinarily company saiäiere

Bank account: Dresdner Bank AQ Herne 2436 · Postal checking account: Dortmund 558 68 · Telegram address: Bahrpatente Hernewestfalen / Babetzpat Munich new account no. 202436

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Mode of action distinguishes »

These advantages of the new ratchet mechanism of the fundamentally The training identified at the beginning is achieved in that the only leather that has the associated stops Determines the switching direction, is designed as a tension spring, which with its one end on the switching element and with its other End attached to the pawl and arranged so that the switching direction by exceeding the Dead point takes place in the manner of a jump mechanism.

In other words, the reversible, toothed ratchet mechanism according to the price increase, which has an annular internally toothed driver head in which freely rotatable a pawl is mounted, one with the teeth of the driver head cooperating external toothing and also has support and tilting surfaces under the action of a single leather to an assigned .vonn on one in the driver head centrally mounted rotor to create G-egenf lachen, characterized in that under formation of the leather as a tension spring one end of the same with the switching element for the switching direction and. her other end with the Pawl is connected, the arrangement and effect of this

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Spring are so that in each of the two latching positions of the pawl the leather holds it in the latched position,, 3E ^: at the same time the Ums ehalt organ πκ ± locked with the associated stop device of the centrally mounted rotor and the spring when transitioning from one to the other stop position under the action of the switching device passes an unstable neutral position, in which it is tensed to a greater extent than in the two latched positions

The subject of the fire are also devices in which the new ratchet mechanism formed as a cast as above Is used, such as ratchet wrenches or other tools or devices that: should be updated

The details and other features of the innovation result from the following description of examples and application examples these, however, which are only to be regarded as such, to which the innovation is by no means restricted based on the illustrations.

Fig «1 shows a ratchet mechanism according to the!

Section * along the line 1-1 of FIG. 2 in the "position of rest".

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Fig. 2 is a horizontal view taken along line 2-2 of the figure. 1;

Pig. 3 shows in a plan view, partially broken away, the pins and locking stops of the Umsehaltorganans, which for the sake of clarity in this figure by 90 in relation to their positions according to Pig. 1 are offset.

Pig. 4 is a side view of the motor of the ratchet mechanism on a reduced scale compared to FIGS. 1 to 3.

Fig. 5 is a plan view of Fig. 4

Fig. 6 is a horizontal section, partly broken away, by the ratchet mechanism, which the positions of its parts relative to each other at the end of the Reveals the locking process. '

FIG. 7 shows a modified embodiment in a representation corresponding to FIG. 6.

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FIGS. 8 and 9 illustrate a plan view and a partial representation two embodiments of the freely pivotable Pawl.

Pig. 10 is an axial section through a further embodiment of the ratchet switch mechanism.

! Pig. 11 shows another embodiment, also in axial section shape of the ratchet mechanism and the

Pig. 12 is a horizontal section along the line 4-4 of FIG.

The ratchet mechanism shown in Figures 1 ″ to 6 consists from a ring-shaped driver head A, a Rotoi rotatably mounted in this? B-, a toothed pawl O, through which the rotor B can be coupled to the driver head A, a spring D and a switch body B for switching the direction of rotation connected to pawl 0 by spring D.

The driver head A is connected to a fixed handle 1. It is bored cylindrically in the direction of the X-X axis. This hole has a fine internal toothing 2 and two

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outwardly extending annular chambers 3 and 4 formed by shoulders.

The rotor B has a cylindrical part 5 with a smooth surface on which relative to the apices of the teeth 2 of the head A is freely rotatable and centered with little play a square 6 on which e.g. a socket wrench is placed can be extended. A collar 7 and a snap ring 8 lying in a groove 9 serve as Mngsanschlag

Driver in the bottoms of the single chambers 3 and 4 of the / head A and leave an axial play that allows for the free rotation of the rotor B about the axis Ti-T. in the driver head is sufficient.

A cylindrical cavity 10 is located in the rotor B

for receiving the switch body 1. Furthermore, a rectangular one

Space with the side surface 1 & intended to accommodate the latch 0.

The pawl 0 has a cylindrical outer surface 12 (J ¹ Ig ₀ 2) with the curvature and the toothing of the toothed surface. 2 of the driver head A corresponding curvature and toothing on »The toothed part of this surface 12 merges into two smooth areas 13 and 14, which have rounded edges 15 and 16,

which merge into inwardly directed flat surfaces 17 and 18. The two surfaces 17 and 18 close with an inner one flat intermediate surface 19 of the pawl O has a V / angle of 10 up to 15 °. This intermediate surface 19 is supported on the side surface 11 of the rectangular space formed in the rotor B away. The latch ö is stored in this room with play. Your surface 19 is by a tension spring D, with one end is attached to a pin 20 inserted into the pawl, held in contact with the rectangular surface 11 of the rotor B.

The switch body B consists of one in the cavity 10 of the Rotor B freely rotatable centered disc. Sin between the thumb and forefinger detectable rib attachment 22 enables Rotation of the switch body E around the axis X-X (Mg, 1). The switching body E is circular due to the interaction of two Grooves 23 and two diametrically engaging in this opposing pin 24 held. The circular grooves 23 are through two from the drawing Subdivided non-removable stops so that the possibility of rotation of the switch body E relative to the rotor B is at an angle χ, which is slightly smaller than 180 °. The pins 24 hold the switch body E in the annular chamber iöfex 3 on the one hand and limit its ability to rotate on the other hand.

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De shall) the pin 21 attached to the switch body S can take either the position 21a or the position 21b according to Figure 2 *

The assembly of the ratchet mechanism creates no difficulties. It is only necessary to insert the pin 20 into the pawl G after the eye of the spring D has been pushed over it, whereupon the pawl G is inserted into the rectangular Eaum of the rotor B with the wall 11 in such a way that the spring D is inside the room 10. Subsequently, the free end of the spring D is attached to the pin of the switch body E and then the switch body B is inserted into the cylindrical cavity 10 in such a position that its rib extension 22 extends in the direction of the handle and the pin 21 is in a central position lies between positions 21a and 21b. Then the two pins 24 are inserted and thereby the rotor B is combined with the driver head A, the collar 7 of the rotor B coming to rest against the wall of the annular chamber 3 , so that this annular chamber is secured against the possibility of dust binding and lifting off of the pin 21 is prevented · Then

the snap ring 8 is inserted and the switch body E is moved, until the pin 21 is in position 21a or 21b. The ratchet switch is now functional *

Through the leather D, on the one hand, the inner plane surface 19 of the pawl 0 is placed against the surface 11 of the rotor B, and on the other hand the pin 21 is held in its position, e.g. the position 21a (! Fig. 2). Only then can he get into the position Skip 21b when the switch body E is actuated.

Depending on the position of the pin 21, in the position 21a or the position 21b, there is a locking between the pawl teeth and drive toothing in one direction or the other, which allows the handle to be pivoted only in the other direction.

In other words, the pulling action of the spring D results in two components, one of which is directed at right angles to the surface 19 and the other of which is directed parallel to this surface. By the action of the second component, the first tooth 12a (Fig. 2) of the pawl is placed on the reminder 2 of the head A, and it is readily understandable that when the head is rotated in the direction of the arrows f ¹ and f ³ in Fig . 2 (since the rotor B is

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is placed) the pawl 0 on the surface 11 of the rotor in Eiohtung of the arrow f at Gedem transition over a tooth. 2 des Driver head A slides a little way and rests on the following tooth of this driver head. this is the Direction of rotation with freewheel.

1 If the driver head does so instead of in the direction of arrow f is rotated in the opposite direction (of the arrow f), with the rotor B fixed, the tooth 12a remains in the Toothing 2 of the driver head A and the surface 11 of the rotor B exerts a pressure p1 perpendicular to the surface 19 on the edge at the pawl, which is converted into a moment p-, 1-, (Fig. 2), which a pivoting of the pawl over the tooth 12a in the direction of the arrow f causes. The surface 19 moves away from the surface 11 until the entire toothing 12 of the pawl engages in the teeth 2 of the head A (Fig. 6).

During the transition of the pawl from the position according to FIG. 2 in which according to Fig. 6 ^ rotates the driver head A looks a little opposite the motor b ± in the direction of arrow f. The tooth 2a, which was opposite the end b of the surface 11 (FIG. 2) is now forward of this surface and the following tooth 2b is opposite the end b of the same (Fig. 6). The edge a

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is still in contact with the surface 11 and the Ends Td and c of surfaces 11 and 17 are in or almost in Co nt act w ith each other.

At the moment in which the contact is reached, the moment which tries to pivot the pawl assumes the value p ₂ lr> Pj 1-j, where Pp directed perpendicular to the surface 17 and 1 «, greater than 1-, is.

It is important that at the time when the stresses the power transmission occur, the surfaces 17 and 19 are in contact with one another, since otherwise there would be a risk that the edge a would move into the surface 11 In addition, the end b of the surface 11 may be the end e do not touch or move away from the end of a, because otherwise the pivoting movement of the pawl O around the tooth 12a are reversed and their teeth only partially into the teeth 2 of head A would intervene. The ¥ angle that the surfaces 17 and 18 form opposite the surface 19 must be exactly below Consideration of the play to be adjusted and the deflection can be determined under load.

The entrainment of the rotor B takes place under the effect of the

pressure of the surface 17 on the surface 11 of the rotor. Simultaneously the circumference 5 of the rotor becomes due to the reaction effect pressed firmly onto the forehead 2 of head A. Which thereby The resulting adhesive effect affects the transfer of the to the head brought to the action and also relieves the pawl 0 of the stresses that they would otherwise take up would have. The teeth 2 of the driver head A and 12 the pawl are slightly blunted so that these teeth do not press into the material of the rotor B or the head A. and therefore the smooth operation of the whole arrangement is not called into question.

This gentle operation in the free-running is a "special feature of the mechanism described -vorstehend It is also eatures a consequence of the enumerated below ^M.:

The pawl 0 is, so to speak, floating and the spring B, which actuates it, therefore has practically no friction to overcome. It only needs to be calculated that the weight of the pawl is balanced in the most unfavorable direction of the same. Dielig feder practically sets the free wheel no viii that stood in the way.

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Me teeth 2 and 12 are fine. The more teeth there are, the shorter the sliding path of the pawl along the surface 11 im In the course of the successive releasing of the teeth. The switching device for the sense of rotation is firmly connected to the eotor B and is not in contact with the head A at any point.

The arc between the engaged teeth 2 and 12 corresponds to about a quarter of a circle, which is an excess of the size of the loaded cross-section and consequently the possibility the use of a very fine toothing results. This excess in size of the loaded area enables the Form pawl in comparison to known pawls in a more advantageous manner, namely the same strength and resistance to achieve the same with less space and it arises as a result and at the same time because of the Fineness of the serrations an extraordinarily small angle of the to and fro movements of the. Pawl.

Finally, it should be pointed out that the blunted teeth are more resistant or robust. They make up as well between the truncations and the bottoms of the teeth of the associated Teeth small cavities, which may contain foreign bodies or dust, as it occurs as a result of wear

there, can record, so that an extremely long life of the device is ensured before disassembling it is required for cleaning purposes.

The inclined surfaces 17 and 18 on the pawl can also good instead of the pawl also at 17a and 18a on the rotor B1 & Fig. 7) be formed, then the pawl CL one over its entire extension is rectilinear inner surface 19a having. The mode of operation, robust construction and the smoothness of operation remain unchanged.

In tests carried out with the ratchet mechanism according to the embodiment described, it was found that the teeth 12 of the ratchet are larger than necessary. Therefore, it is possible to cut off or the square head 6 to divide the body A, without the ² idea is weakened. The embodiments according to FIGS. 8 and 9 are based on these considerations.

In the embodiment according to FIG. 8, the reminder 12 is in the middle area of the pawl CU interrupted at 26. In the embodiment according to FIG. 9, the pawl CU has two ■ Calibrate circumference from he 1, k and l, m running serrations 12 'and

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12 ''. Diester with chi e which center points 0 ', O ^M on. In these two embodiments, only part of the toothing is used for each of the two directions of rotation.

In the case of the embodiment according to fig. 10 the rotor B4 protrudes at 27 and is knurled at 28 in order to enable a nut or screw to be screwed in or out, either loosely or more or less strongly tightened. At home, the screwing process is loose, the rotor B can be turned directly by hand, which can be done more quickly than by a much slower back and forth movement of the body A.

if the thread turns of the screw to be operated are very crowded are, the user can also under certain circumstances directly, and then with greater effectiveness, on the knurled Part of the rotor B4 act, the pawl D only in Time of blocking and unblocking is used. In both of these cases, time is gained - something in particular is of importance when the movement of the handle of the ratchet mechanism through any obstacles is restricted

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4 -16-

In all of the exemplary embodiments described the spring D at the time of switching the central area of the rotor B or B4

In the embodiment according to FIGS. 11 and 12, the middle cable of the rotor B5 remains free from the spring D5. A pin 29 can therefore be placed on the rotor, on which the switch body E ₁ - is centered. A single snap ring 30, which was inserted into an annular groove in the pin 29, is sufficient to hold the mechanism together.

The pawl ö _r is applied here by the spring D, - with its two surfaces 11 and 33 on the rotor B ₁ - because the distance s (FIG. 11) is smaller than the distance between the points t and u of the spring D. ₁ - in the free state of the same. This can

one on a third ^ against the switch body leading surface waive. This embodiment is more advantageous than the previous one from the viewpoint of manufacturing cost.

The hole in the pawl ö 5> into which the spring D _{1 is} hung is preferably chamfered at 32 in order to facilitate assembly and also to center the pressure on the surface 11. Otherwise the pressure could build up in the upper area of the surface, creating the risk of a

Bending and thus changing the setting of the pawl results.

Briefly summarized, the spring D ₁ - serves the following purposes: it holds the pawl C ₁ - on the! Laugh 11 and 31 of the rotor B ^ j

it locks the two switching positions represented by the supported by the switch body S .5 pin 35 / ■ - 'are ■ defined, with the rotor at the B ₁ -. cooperate mounted pin 36, j

it presses the pawl ö 5 against the teeth 2 of the driver head A5-J

it presses the switch body D 5 against the one holding all parts together Snap ring 30, the surfaces 33 and 34 being held apart.

As can be seen, in the various other embodiments, as in the case of the first example, the switchover body E, or Ej- is centered in or on the rotor "B, or B ₁ -, which means that there is any friction with the body .JL or A- during freewheeling. is prevented.

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In the case of the reports Td written embodiments only met a single spring at the same time the task of locking and blocking in the "two switching positions.

Protection claims s

Claims (2)

Protection claims ι 1. Reversible toothed ratchet mechanism with a ring-shaped Driver head, in the cavity of which the toothed pawl is arranged, which extends over contact surfaces on the centrally mounted rotor and their viewing direction is fixed by a single leather over assigned stops, characterized in that the known per se Way designed as a tension spring 'leather (D) with one end on the switching element CE) for the switching direction and is attached at its other end to the pawl (0) and is arranged so that the switching direction is switched by exceeding the dead center in the manner of a jump mechanism he follows. 2. Reversible toothed ratchet mechanism with a ring-shaped internally toothed driver head, within which a pawl with external toothing can be freely rotated is stored, the third toothing interacts with the third toothing of the driver head and.die also support and Tilting surfaces aufweis.t ', - which are under the action of a single leather to one of the associated with one centered in the Drive head mounted rotor arranged mating surfaces 4n- will
laid, / characterized in that under the formation of the leather (D) as a tension spring, one end of the same with the toggle - 20 - organ (S) for the switching direction and its other end with the pawl (0) is connected, the arrangement and effect of this leather are such that in each of the two latching positions, the pawl (0) the spring (D) holds the pawl (G) in the latching position and at the same time the switching element (E) locked with the assigned stop device of the centrally mounted Eotor and the leather at the transition from one stop position to the other under the action of the switching element (E) an unstable neutral position happens, in which she is more excited than in the link link positions. 3 · Carrier mechanism according to claim 1, characterized in that of the pairs of planar surfaces associated with one another (.19 »11) of the pawl (.0) and the rotor (A), which are brought into contact with one another under the action of the leather, one (19) at both ends by two parts (17, 18) with a flat surface, the opposite to the associated flat surface diverge, is elongated. 4. Driver mechanism according to claim 1, characterized in that that the rotor to the outside of the bore of the driving head is extended by a rope (6) that controls the rotation of the eotor made possible by hand.