DE2239798B2 - Locking synchronization device for tooth clutches in change gears, in particular of motor vehicles - Google Patents

Description

one on either side of the

of the switching

SSSr

_{g of the switching ring}

lungs are not available these axial guides are also any jamming men avoided and the synchronization as well as the Switching ring are secured by the spring springs is called back to their mutual center position Avoid premature wear on the friction surfaces

15 _Lock synchronizing

tSffi is the emptying geη the g ^ ^ _lg are added behind to

show. _{24 locked in} place and keep the ijn

Hongen, Schult _{M ttel} position towards the

chrome »^ _{h is} secured, aass s.ch die

Touch the scarf ga.

Ream achen 10_u> ^ια . _the drive shaft!

3o

At the beginning of the shift, the Shoulders ™ offer something of a certain Resistance, which is a sufficiently strong contact pressure of the friction surfaces of the friction cone and synchronizing

Serring and thus a mutual twist of Synchfonisierring and switching ring effects is however synchronism is achieved by the shifting force Put the ring feather over his shoulder and now then when the switching process is completed, there is no longer any significant force opposing the switching movement.

Di? Invention is based on one in the drawing illustrated exemplary embodiment explained in more detail below. It shows

F i g. 1 shows an axial section through the locking synchronizer .

F i g. 2 is a partial view of the switching ring.

Fig. 3 to 6 show a partial view of the locking synchronization device from the outside in different switch positions.

7 and 8 axial sections during the provided

Switching phases. ,1

The two interchangeable gears 2, 2 'to be coupled with it are rotatably mounted on the drive shaft 1. A coupling ring gear 9 is connected to each of the gears, each with a friction cone, with a friction surface 10 directed radially inward. ^The coupling teeth are denoted by 11.

The hub, which has keyways 4, is non-rotatably connected to the drive shaft 1. In this Keilnu- In engages with teeth 6 of the switching ring e, n. The SchalttrinsS is moved by the shift fork 7. He wears up Spdchen 8. The number of clutch teeth 11 is equal to the number of spokes 8 or a multiple. Each of the spokes is provided with striking blocking surfaces Sa, 8b

A common synchronizer 12 is arranged within and between the two clutch sprockets 9. The Synchromsiernng 12 has radially outwardly directed friction surfaces 13. It is freely displaceable in the axial direction and can swing back and forth in the direction of rotation. Recesses are provided on the circumference of the synchronizing ring ⁱⁿ ^ _b ^ ^ ^ Sj.ichronizernngcs anhc _D t Dk ^ _{d per friction surface 1C of the} coupling

J - * '™ ^ "it 9 is pressed. If the clutch ring gear 9 now has a large- ^^ _the P ^^,. Then the

öere [^ _{12 by the} to the Re » ^bf l ^acn ^

Syndunmawnn taken and the

W ore g _{rf s envisaged} locking of the memory _{contact with} the locking surface 20 flac ^he ° ^ ⁰ "™; _{erri it as} shown in Fig. 4. des Synch ™ n« »e.« Ng ^ _{niueTUngcs 12} against-

over the switching ring 5 takes place in the direction / the

^^^ _end ^S _A ntriebswelle first

The adjacent blocking surfaces 8 a and 20

J * ° ™™™ _{ne we} rther shift of Schaltnn- "^ change eme we ^^^ _{pressure fd}

g «S according to lmta ^ ^ _the friction surfaces 10, 13

be pressed together even more so that the stationing process is accelerated.

With the progress of synchronization decreases with fortschre '> _{surfaces 10> 13 f} transmitted

_The torque is _{no longer available when the gearwheel2 is} synchronized, practically even that caused by the locking flaps. st is raised ρ ^ _{Speming a} ".

J ^s _ch ² _"ie ^U _s ⁿ _chräge arrangement of the locking surfaces 20 by the suirag _vnch ror: ierring and

"" ^ nsTge _n e Nander ENW "the Pfeilr.chtung Schdltring Gegene, _Pictured n _t. Here,

twist «w e s ^ ^ ^ g ^ ^

w ^ d ^aucl ; ^{aie B the} _further shifting of the prints and set _{ns values force}

If now the spokes 8 are not with the so-called _{bowrn uhmjn} "formed tooth ^" _u ^ shallow. Uuen luckeii inclined surfaces 22 on the, in a known _Kupplungsz ähne fmen End ^ «rotation of Kupplungj method me ge ^ f _e genüber the Schdltring. _{This is} then given with further dance dances

Shift _{the clutch tooth} e

ler conical surface 25 their return to the shoulder 24. The spring expands and slides along the conical surface 25, which widens towards the central plane, until it engages behind the shoulder 24. Since the shift ring 5 and its shift fork 7 in the idle position in a known manner in the in F i g. 1, the middle position shown is locked by means of the ring springs resting on the shoulders 24 18 also held the synchronizing ring in its central position.

1 sheet of drawings

Claims (1)

1 2 Pressure hulls, on which the blocking surfaces are also provided, and the synchronization only via Claim: the coil springs are made, corresponds to the maximum Driving force of the friction surfaces in the springs Locking synchronization device for gear coupling 5 stored force. You can therefore by more or lungs in change gears, in particular by less strong pressure on the shift fork, the syn motor vehicle, with two alternating not affecting the chronizing process. In order to guarantee short synchromeshing of the gearwheels to be coupled to the drive shaft, the coupling gear rims facing the other had to have a correspondingly large spring force on two helical springs, each with a friction cone with a radial inward direction. which make shifting more difficult with one friction shift because it must first be overcome with each shifting surface of a common synchronizing ring A compromise must be made when using a switching ring with spokes, with 15 weaker springs resulting in longer synchronization times on both the synchronization and the switching nes ° must be tet upon the synchronizing we- both parts additionally urges said press body, the door kenden axial thrust springs are provided, the axial guides are eingearbeibestrebt in the synchronizer, each other in the joint. ² These axial guides can also be attributed to the central position, which is problematic during operation, because it indicates that the synchronizing ring pressure bodies are exposed to one-sided loading when the locking (12) becomes effective on its surfaces facing away from the friction surfaces (13). In the case of two conical surfaces opening towards the middle transverse plane of the short axial guides on the inside, conical surfaces can therefore jam the pressure body, a longer surface (25) that results from the shifting design of the axial guides a larger path of the Switching ring (5) extend, and that the size in the axial direction. Inside of the synchronizing ring on both sides of the it is also a locking synchronizer Middle position of the switching ring a shoulder (24) (from German Patent 1101 057) known, has, on each of which there is a 7th on both sides 3 ° at which the clutch ring gears radially outwards of the spokes (8) of the switching ring arranged directed friction surfaces. The synchronizing Ring spring (18) is supported. ring has a in the middle on its outside Annular groove with a V-shaped cross section, in which an annular spring is arranged. This ring spring takes effect 35 halfway into a groove in the switching ring. If the switching ring is axially displaced in relation to the synchronizer after synchronism has been achieved, so the ring spring 36 leaves the groove with a V-shaped cross-section. It is thereby expanded radially The invention relates to a Sperrsynchronisierein-. _{4 Λ tet and lies with} greater spring force on the circumference of the direction for tooth clutches in change gears, synchronizing ring, so that it is in particular of motor vehicles, with two wech- _pe i being taken and with its second friction Selective tooth surface to be coupled with a drive shaft prematurely in contact with the friction cone of the wheels facing clutch gear rims on another gear ring without perhaps a reject, is intended with one friction cone with radially in- ₄₅ engagement. This results in a nen directed friction surface, which with. one frictional unnecessary wear and tear on the frictional surfaces. It is also surface of a common synchronizing ring is not ensured that in the middle position of the cooperate, as well as an axially directed toothed switching ring of the synchronization also in cooperation opening to engage the toothing of a spoke is located, which also causes wear wherein both the wetting of the friction surfaces ₅₀ syn- can occur having switching ring. Will after chronisierring as well as on the switching ring together disengage the previous gear immediately. beitende blocking areas and to generate an on, there is no blocking effect, there Axial thrust Fe acting on the synchronizing ring - this only occurs when the ring spring has been restored beforehand which are intended, both parts j _n the V-shaped ring groove of the synchronizing ring to return each other to the middle position. _{55 could} snap into place. However, this is as mentioned above In such a case (from the German interpretation it became, not always the case. Finally, can writing 1 098 824) known locking synchronization unit by the centrifugal force the ring spring unintentionally direction are several in the synchronizing ring spreading and thus also the locking effect is lost. Axially displaceable pressure hulls are arranged. net. These pressure hulls have blocking surfaces, which 60 The object of the present invention is to- uni.er interposition of a locking ball each with reasons, a locking synchronization device of the Interlocking surfaces of the switching ring cooperate. above-mentioned type of construction, which in their The power transmission between the pressure hulls structure is considerably simplified and is operationally reliable and the switching ring is carried out by both sides on the and with the lowest possible forces to Coil springs lying against pressure bodies, which have to be used for 65 switching, with their outer ends on the synchronizing ring This is achieved according to the invention by prop up. Since in this known Sperrsynchroni- that the synchronizing ring on its the friction surfaces control device the power transmission between the turned away inside two to the middle transverse