AT502092B1

AT502092B1 - SYNCHRONIZING DEVICE FOR A MANUAL GEARBOX

Info

Publication number: AT502092B1
Application number: AT10152005A
Authority: AT
Inventors: Rudolf Dipl Ing Enzendorfer
Original assignee: Avl List Gmbh
Priority date: 2005-06-16
Filing date: 2005-06-16
Publication date: 2009-04-15
Also published as: AT502092A1

Description

2 AT 502 092 B12 AT 502 092 B1

Die Erfindung betrifft eine Synchronisiereinrichtung für ein Schaltgetriebe mit einem Synchronkörper und zumindest einem Kupplungskörper, welche über zumindest einen Synchronring miteinander verbindbar sind, wobei der Synchronkörper eine Kanalanordnung mit zumindest einem ersten Kanal aufweist, welche zu zumindest einem ersten Raum im Bereich einer dem 5 Kupplungskörper abgewandten Stirnseite zumindest eines Synchronringes führt.The invention relates to a synchronizing device for a manual transmission with a synchronizer body and at least one coupling body, which are connectable to each other via at least one synchronizer ring, wherein the synchronizer body has a channel arrangement with at least a first channel which faces away from at least a first space in the region of the coupling body 5 Front side leads at least one synchronizer ring.

Aus der US 4,494,638 A ist eine Synchronisiereinrichtung bekannt, bei der im Synchronkörper zur Kühlung des Synchronringes ein Kühlkanal angeordnet ist, welcher ein Kühlmittel zu einer ringförmigen Kammer innerhalb des Synchronringes führt. Eine ähnliche Kühlkanalanordnung 10 ist auch aus der JP 09-089004 A bekannt. Für Antriebssysteme mit hoher Leistung, insbesondere für Mehrfachkonus-Synchronisiereinrichtungen ist die Kühlung der Synchronringe allerdings nicht ausreichend. Dadurch kann es zu einem Abbrennen der Synchronringe und zu einem überdurchschnittlich hohen Verschleiß kommen. 15 Aufgabe der Erfindung ist es, diese Nachteile zu vermeiden und den Verschleiß von Synchronringen zu vermindern.From US 4,494,638 A a synchronizer is known in which a cooling channel is arranged in the synchronizer body for cooling the synchronizer ring, which leads a coolant to an annular chamber within the synchronizer ring. A similar cooling channel arrangement 10 is also known from JP 09-089004 A. For drive systems with high performance, especially for multi-cone synchronizers, however, the cooling of the synchronizer rings is not sufficient. This can lead to burning off of the synchronizer rings and to an above-average level of wear. 15 object of the invention is to avoid these disadvantages and to reduce the wear of synchronizer rings.

Erfindungsgemäß wird dies dadurch erreicht, dass der erste Kanal radial ausgebildet ist, und dass vom ersten Kanal zumindest ein Zweigkanal zum ersten Raum führt, und dass der vor-20 zugsweise von einem ringförmigen Verteilerkanal an der Innenseite des Synchronkörpers ausgehende erste Kanal von einer äußeren Mantelfläche des Synchronkörpers gebohrt ist, wobei vorzugsweise die Mündung zumindest eines Zweigkanals im Kontaktbereich von zusammenwirkenden Reibflächen zweier Synchronringe angeordnet ist. 25 Eine besonders einfache Herstellung ergibt sich, wenn der erste Kanal von einer äußeren Mantelfläche des Synchronkörpers gebohrt ist und vorzugsweise im Bereich der äußeren Mantelfläche durch einen Verschlussteil verschlossen ist. Der Verschlussteil kann dabei koaxial mit dem ersten Kanal oder in einer den ersten Kanal kreuzenden Aufnahmebohrung angeordnet sein. Der erste Kanal kann von einem ringförmigen Verteilerkanal an der Innenseite des Synchron-30 körpers ausgehen.According to the invention this is achieved in that the first channel is formed radially, and that at least one branch channel leads from the first channel to the first space, and that the pre-20 preferably from an annular distribution channel on the inside of the synchronizer body outgoing first channel of an outer circumferential surface is drilled in the synchronizer body, wherein preferably the mouth of at least one branch channel is arranged in the contact region of cooperating friction surfaces of two synchronizer rings. 25 A particularly simple production results when the first channel is drilled from an outer circumferential surface of the synchronizer body and is preferably closed in the region of the outer lateral surface by a closure member. The closure part can be arranged coaxially with the first channel or in a receiving bore crossing the first channel. The first channel can emanate from an annular distribution channel on the inside of the synchronous body.

Vorzugsweise ist dabei vorgesehen, dass von jedem ersten Kanal zumindest zwei zur Stirnseite der Synchronringe führende Zweigkanäle vorgesehen sind. 35 Eine besonders gute Kühl- und Schmierleistung kann erreicht werden, wenn mehrere, vorzugsweise zumindest drei, erste Kanäle gleichmäßig in Umfangsrichtung verteilt im Synchronkörper angeordnet sind.Preferably, it is provided that at least two leading to the end face of the synchronizer rings branch channels are provided by each first channel. A particularly good cooling and lubricating performance can be achieved if a plurality, preferably at least three, first channels are distributed uniformly in the circumferential direction in the synchronizer body.

Insbesondere bei Synchronisiereinrichtungen mit mehreren Synchronringen ergibt sich der 40 Vorteil, dass das Kühlmittel direkt zu Bereichen mit hoher Wärmeentwicklung, nämlich in den Bereich der Reibflächen zwischen den Synchronringen, also zwischen Innenring und Zwischenring beziehungsweise zwischen Außenring und Zwischenring, geführt wird. Dadurch ergibt sich eine besonders gute Wärmeabfuhr aus den thermisch hoch beanspruchten Bereichen. 45 Eine weitere thermische Entlastung der Synchronringe kann erreicht werden, wenn die Kanalanordnung zumindest einen zweiten Kanal aufweist, welcher vom ringförmigen Verteilerkanal ausgeht und zu einem vorzugsweise ringförmigen zweiten Raum zwischen Mantelflächen des Synchronkörpers und eines Synchronringes führt, wobei vorzugsweise zumindest zwei zweite Kühlkanäle - in einem Längsschnitt durch den Synchronkörper betrachtet - V-förmig angeordnet so sind.Especially in synchronizers with multiple synchronizer rings, there is the advantage that the coolant is led directly to areas with high heat development, namely in the region of the friction surfaces between the synchronizer rings, ie between the inner ring and intermediate ring or between outer ring and intermediate ring. This results in a particularly good heat dissipation from the thermally highly stressed areas. Another thermal relief of the synchronizer rings can be achieved if the channel arrangement has at least one second channel, which emanates from the annular distribution channel and leads to a preferably annular second space between lateral surfaces of the synchronizer body and a synchronizer ring, preferably at least two second cooling channels - in one Longitudinal section viewed through the synchronizer body - V-shaped arranged so are.

Die ersten und zweiten Kanäle können dabei in verschiedenen Ebenen angeordnet sein.The first and second channels can be arranged in different levels.

Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. 55The invention will be explained in more detail below with reference to FIGS. 55

Claims

FIG. 2 shows the synchronizing device in a section along the line INI in FIG. 1, FIG. 3 shows the synchronizing device in a section along the line III-III in FIG 2 shows the detail IV from FIG. 3, FIG. 3 a shows the synchronizing device in a second embodiment variant in a section analogous to FIG. 3, FIG. 4 a shows the detail IV a from FIG. 3 a, 5 7 shows the synchronizing device according to the line VII-VII in FIG. 2, FIG. 8 shows the detail VIII from FIG. 7, FIG. 9 shows a synchronizing body in an oblique view 10 shows an inner ring in an oblique view, and FIG. 11 shows an outer ring in an oblique view. Functionally identical parts are provided in the embodiment variants with the same reference numerals. The synchronizer 1 has a synchronizer body 2, which is connected via a sliding sleeve 3 with one of the two coupling body 4. Synchronizer rings, namely inner rings 5, intermediate rings 6 and outer rings 7 are arranged coaxially between the synchronizer body 2 and each coupling body 4. The intermediate rings 6 are rotatably connected via a respective cylindrical first driving pin 27 with the coupling bodies 4. The first driving pins 27 are pressed parallel to the axis 1 a of the synchronizer 1 in the first holes 8 of the coupling body 4. The intermediate rings 6 have formed as blind holes second holes 9, in which the first driving pins 27 engage with play. Inadmissibly high stresses and changes in shape of the intermediate ring 6 due to a press fit between the first driving pins 27 can thus be avoided. The inner rings 5 are rotatably connected to the synchronizer body 2 axially parallel inserted, for example, pressed-in, second driving pins 10, wherein the second driving pins 10 engage in recesses 11 of the inner rings 5. The first and second drive pins 27, 10 enable reliable and fail-safe synchronization operations, especially in high-performance drive systems. For cooling and lubrication of the synchronizer rings 5, 6, 7, the synchronizer body 2 has a channel arrangement 12. The channel arrangement 12 includes radial first channels 13 emanating from an annular distributor channel 17, from which branch channels 14a, 14b running parallel to the axis 1a of the synchronizing device 1 to a first space 16a in the region of end faces 5a, 6a, 7a of the synchronizer rings 5 facing away from the coupling bodies 4 , 6, 7 lead. The orifices 14a ', 14b' of the branch channels 14a, 14b are arranged in the contact region 19, 20 of cooperating friction surfaces of the synchronizer rings 5, 6, 7. Furthermore, the channel arrangement 12 has V-shaped second channels 15, which open into second spaces 16b between lateral surfaces 2b, 5b of the synchronizer body 2 and the inner rings 5. The first and second channels 13, 15 are based on an annular distribution channel 17 on the inside of the synchronizer body 2. The annular distribution channel 17 is fed via feed channels of a not shown, connected to the synchronizer body 2 shaft. The uniformly distributed in the circumferential direction of the first channels 13 can be made in a simple manner by radial holes from the outer shell 2a of the synchronizer body 2 ago. Thereafter, the first channels 13 are closed by closure members 18 to the outside. The first and second channels 13, 15 existing channel assembly 12 is particularly suitable for high-performance drive systems, such as commercial vehicles. 1. Synchronizing device (1) for a manual transmission with a synchronizer body (2) and at least one coupling body (4), which are connectable via at least one synchronizer ring (5, 6, 7) 4 AT 502 092 B1, wherein the synchronizer body ( 2) has a channel arrangement (12) with at least one first channel (13) which leads to at least one first space (16a) in the region of an end face (5a, 6a, 7a) facing away from the coupling body (4) at least one synchronizer ring (5, 6 , 7), characterized in that the first channel (13) is formed radially, and that from the first channel (13) at least one branch channel (14a, 14b) leads to the first space (16a), and that preferably of an annular Distribution channel (17) on the inside of the synchronizer body (2) outgoing first channel (13) from an outer circumferential surface (2a) of the synchronizer body (2) is drilled.

2. synchronizing device (1) according to claim 1, characterized in that the mouth (14a \ 14b ') at least one branch channel (14a, 14b) in the contact region (19, 20) of cooperating friction surfaces of two synchronizer rings (5, 6, 7) is.

3. Synchronizing device (1) according to claim 1 or 2, characterized in that the first channel (13) in the region of the outer lateral surface (2a) is closed by a closure part (18).

4. Synchronizing device (1) according to claim 3, characterized in that the closure part (18) in a first channel (13) crossing, preferably achsparalle-len receiving bore (18 a) is arranged.

5. synchronizing device (1) according to one of claims 1 to 4, characterized in that of each first channel (13) at least two to the end face (5a, 6a, 7a) of the synchronizing rings (5, 6, 7) leading branch channels (14a, 14b) branch off.

6. synchronizing device (1) according to one of claims 1 to 5, characterized in that a plurality, preferably at least three, first channels (13) evenly distributed in the circumferential direction in the synchronizer body (2) are arranged.

7. Synchronizing device (1) according to one of claims 1 to 6, characterized in that the channel arrangement (12) has at least one second channel (15) which starts from the annular distribution channel (17) and leads to a preferably annular second space (16b). between lateral surfaces (2b, 5b) of the synchronizer body (2) and a synchronizer ring (5) leads.

8. synchronizing device (1) according to claim 7, characterized in that at least two second channels (15) - viewed in a longitudinal section through the synchronizer body (2) -V-shaped.

9. synchronizing device (1) according to claim 7 or 8, characterized in that the first and second channels (13, 15) are arranged in different planes. For this purpose 6 sheets of drawings