WO2014059985A1 - Shifting device for a transmission - Google Patents

Abstract

The invention relates to a sleeve carrier (1) for a synchronizing device. Said sleeve carrier (1) has an internal toothing system (2), an external toothing system (3) for a slider sleeve and a main body (4) which connects the internal toothing system (2) and the external toothing system (3), wherein the parts are configured in one piece from sheet metal and each tooth (22, 23) of the toothing systems (2, 3) which does not flank a pressure-piece cut-out (10) is attached over the entire axial length thereof to an adjacent tooth (22', 23') or to the main body (4). The invention also relates to a method for producing a sleeve carrier, wherein a plurality of pockets (7, 8) are made in a sheet-metal disc (5), and to a central recess (9), in so far as the sheet-metal disc (5) has not already been configured as a ring, and to an external toothing system (3).

Description

 Switching for eirs gearbox

Description ^' Field of the invention

The invention relates to a bushing support for a ^'■ a synchronizer Kraftfahrzeugwechseigetriebes, comprising an internal toothing on the approximation binding to a transmission shaft, a ÄußeRverzahnung for a sliding sleeve and the internal toothing and the connecting base body Äußenverzahnung.

Background of the invention in modern manual transmissions are predominantly used Synchronisier- scraps to allow a comfortable way to switch back between the different gear ratios. During the shifting process, the circumferential speed of a gear wheel of the peripheral speed of the gearbox is adjusted by means of various elements of the synchronizer, and then a positive connection is established between the gear shaft and this gear wheel. By designated as synchronizer body fvluffenträger the gear shaft and the sliding muff of the synchronizer are rotatably connected to each other. This is done on the fly! cia- by that the sleeve carrier on the one hand in Umfangshehtung is positively connected via a trained on his Na e spline or Verzähnungsprofil with the irrigation wave and on the other hand via an outer toothing of his sleeve carrier the sliding sleeve at his Äuf enddiameter axia! slidably receives. Furthermore, the sleeve carrier serves as an abutment and guide element for synchronous or friction rings. For this purpose, usually continuous slots or recesses are introduced into its end faces, in which bolts or driving cams of the synchronous or friction rings are guided. In addition, the sleeve catcher takes up slots in length uniform intervals are worked out on its outer circumference, elements for Ansynchronisieren such. B. plungers or elements for locking the sc Liebemuffe or plungers such as z, B. locking pin on. Sleeve carriers have to withstand high torques and are therefore almost exclusively machined, which is complicated and associated with high production costs. Also machined sleeve carriers are quite heavy. Sintered sleeve carrier have compared to machined sleeve carriers a lower strength due to the lower material density and are still relatively expensive to produce.

There are also sleeve carrier known from two sheet metal shells A synchronizer siereinrichtung with such a built sleeve carrier is for example from the published patent application DE 25 37 495 A1. The sleeve carrier has two in cross-section U-shaped disk body, which are fastened with their webs together, so that not under all circumstances a sufficient stability is ensured, especially in the axial direction. Molded sheet metal sleeve carriers are always made of multipiece. The items, usually two half-shells, must be connected to each other in a rotationally fixed manner. The connection point is highly latched by the torques to be transmitted and leads to the deformations of the sleeve carrier. Under load, the metal plates twist and can not transmit any big moments. Due to the low load capacity such sleeve carrier in most transmissions of modern motor vehicles are not applicable due to the high torque requirements.

Furthermore, EP 2 182 233 A discloses a one-piece, manufactured sleeve carrier made of sheet metal, which has a toothing with segments which are directed alternately out of the plane of the disk body in different axial directions. The viability of Äußenverzahn ng is by only one side RIC iete g ^'n. Eßä ^ un.gsa ^jsöh' .itte uzteft .m. Because the Seheibenkör- each forms the axial end of the toothed sections, the load capacity is lower than with non-flared teeth or ^■ .mittig arranged base body, and the end teeth of the toothed segments are particularly burdened by bending is required for a uniform wear right angle! the external teeth to the base body also difficult to produce.

Object of the invention

It is an object of the present invention to obviate the drawbacks mentioned above and to propose a carrier suitable for mass production, which can also transmit high torques.

It is another object of the invention to provide a method for producing a dera term sleeve carrier.

Summary of the invention

The objects are achieved by a sleeve carrier according to claim 1 and by a method according to claim 2,

The fvluffenträger invention is made of sheet metal. The sleeve carrier has external teeth, an internal toothing, by means of which the sleeve carrier a of the gear shaft is supported, and a main body connecting the internal toothing with the external toothing as three main components. The outer toothing and the main body as well as the internal toothing are formed in one piece. Due to the one-piece joint connections can be omitted, whereby the sleeve carrier has a high load capacity. Compared to sleeve carriers from two shark sharks, the stability is increased, since the missing joint connections do not have to absorb the entire load and cause the half shells to twist more easily. At the same time, the production cost is lower due to the omitted joining steps, and a high timing is possible. A high load-bearing capacity is achieved by ensuring that each tooth of the teeth: which does not flank a pressure-fugitive discharge samie axial length is connected to a neighboring tooth bar or to the main body. As a result, there are no lobe-like toothed segments, which, viewed in the circumferential direction, have free ends, whereby the load on the end teeth of a Verzah¨ungssegments omitted.

The engagement of each tooth - with the exception of the edge teeth to the pressure piece recesses - over the full axial length can take place on the adjacent tooth, on the main body or on both. If a toothing composed for example of several VeFzahnungssegmente, the teeth on the toothed segment ends via radial walls be connected to the body.

It is advantageous if there are two adjacent teeth of the teeth with the exception of the edge teeth flanking Druckstückaussparüngen have the same distance from each other. The teeth are so formed fully closed except Druckstückaussparungen. Overall, carry more teeth, and the load capacity increases.

The load capacity can be further increased when a barren both the encryption toothings is arranged axially in the center ^'to the base body or are. The extent of the toothing or toothing is, viewed from the plane of the main body, symmetrical in both axial directions.

By a kaStumformtechnische production of the sleeve carrier in an inconvenient manner, in particular in large quantities can be produced inexpensively. A machining of the sheet, for example, to bring in individual function elements, is of course not excluded.

In order to enable a secure connection of the weapon carrier to the transmission shaft, it is not necessary for the internal gear g to have a circular section of constant axial length nor for the axial length over which the sleeve carrier is supported to always be the same over the inner circumference Value. Rather, it is sufficient that these nimal value does not fall short In a further development, the fluid carrier has an axial diameter which varies over its inner circumference. In a next development, the internal tiling is formed of a plurality of thumb-tie eyelets axially slightly offset relative to each other in circumferential direction. The so-called projections and jumps can serve as stops.

The internal toothing of the sleeve carrier preferably has an indexing sync to the positive connection to the gear shaft. The blade carrier may also have pocket contours, which may represent changes for synchronizer rings,

In one embodiment, the outer toothing is divided into a plurality of outer tooth segments, which are spaced apart from one another by pressure piece recesses. In the pressure piece recesses, during assembly: the ⁽ operation of compressed air or a locking element that can be prestressed against a sliding sleeve a can be achieved

According to the proposed HersteSIverfahren the production of a erfi dungsgemäöe sleeve carrier is made of a sheet. The sheet is frosted in the form of a Blechpiatte or Blechringpiatte, which are referred to below as sheet metal discs. For example, the bending discs are made from a semi-finished product such as tape material! been punched. The sheet-metal ring plate differs from the sheet-metal plate in that only the sheet-metal ring plate has a longitudinal recess. The sheet-metal discs are preferably circular in form of round blanks and have an outer rim S narrow compared to the end face. Later, external splines from the outside! In order to be able to produce the slice, the thickness of the plate of the seed must not be too thin. To be able to transmit sufficiently high torques, the starting plate is in de rege! so strong that bending techniques for forming aussoHeiden. The lead plate may be punched out of a strip of material as a sheet metal ring, or else a sheet metal plate may be punched, whereby the hole may constitute a perforation. A plurality of pockets are introduced axially into the sheet-metal disk thus provided. The pockets can be produced by extrusion, deep-drawing, stamping or punching. Preferably, the pockets are pulled. This can be done in a one-step or in a multi-step process. Irr an advantageous development, the pockets are mutually introduced from different end faces on the sheet metal disc. As easy to handle and minimize unwanted deformations, it has been found preferable to all pockets on one end and to finish in a second step. Subsequently, the pockets of the opposite end face are pulled forward and finished. Thus, all pockets which are directed in the same axial direction are produced together,

The pockets themselves may have heels, grooves or edges which increase rigidity and allow for greater elongation of the material.

In one embodiment, the pockets are spaced from each other by webs which lie in the plane of the unprocessed sheet metal disc. The rigidity of the sheet metal disc and thus the load capacity of the later sleeve carrier is thus increased. Alternatively, the pockets can adjoin one another directly without webs running in the plane of the bending-blade blank. Also, the pockets can be made via Trennschnitie,

After completion, the pockets have radially inner pocket inner walls which preferably extend orthogonally to the end face. Their shape depends on the shape of the gearbox threads on which the socket carrier is to be mounted, since the terminal pads are later connected. takes place at the Getriebeweiie. For the normal case of a round gearbox e pocket walls expediently so that they always have the same common distance to the axis of rotation.

The ashes were preferably introduced at a distance from the inner and outer edges of the tin snips. As a result, the axial length of the pocket inner walls can be maximized, which increases the transmittable torque. If the pockets are mutually introduced by respective opposite end faces, the pockets can nnehwände axially extend in each case ^' different Riehtunge from the plane of the Bleohscheibe. Pocket inner walls offset axially relative to one another can be used as stops for circumferentially oriented mounting on a suitably designed gearbox. The mutually arranged pockets can be shaped the same and therefore be complementary to each other in your Gestaäl. Alternatively, their profile is different. Thus, in one embodiment, it may be provided that the di are made in a two-stage process and have different tassel wires, while the second pockets have a depth that is constant over the pocket.

The pocketed intermediate product may optionally be pre-punched in the event that it is not made from the sheet metal ring plate, but from the Blechpiatie, the diameter of the pre-perforation less than the distance between two radially opposite Tascheninnehwände ast.

Subsequently, a Zentraiausnehmung is preferably introduced by punching in the Bleehsoheibe. If the sheet-metal disc already has a pre-perforation or a passage recess, this recess is of the central recess to be introduced. The perforation removes the board which separates the pockets in the inner wall from the pre-perforation. The preload is thus made to measure or, in the event that no pre-perforation has been introduced, provided with the Zentraiausnehmung. The diameter of the center recess should be equal to the top circle of any internal teeth to be inserted. In a further development, it is provided to make a hole from both Axiaiseiten to process a circular Zentraiausnehmung with radially adjacent, axiai directed pocket inner walls to get.

Finally, external toothing is produced, for example, by an aluminum process, preferably pressing, of the outer edge of the sheet-metal disk.

The outer toothing extends axially out of the plane of the bending disc. This protruding part can be provided by punching or other Abtragungsverfahre with recesses in the form of windows in which pressure pieces or detents can be arranged prior to assembly, in a development of the invention, the axially extending pocket inner walls are provided with internal teeth. For this purpose, the internal toothing can be produced with a stamp. Si can be generated by one or more draws. In one variant, a toothed ring is provided as EinlegeteiS, which is for example form-fitting supported on the base body in a Zentraiausnehmung suitable for it.

In a next development of the sleeve carrier is nitrocarburieri

Brief description of the figures in the drawings are shown embodiments of the invention. Show it:

1 is a perspective view of a teilgeschnitlenen annular disc with a nnenverzahnung

Fig. 2 shows a first, iFlumbenträger iFlungsenträger with windows for

Duck pieces ,. Fig. 3 shows a second, according to invention uffenträger with intermittent interruptions for plungers, Fig. 4 is an enlarged view of the annular disc of Figure 1 in rotated

 Representation, a longitudinal section through the annular disk of Figure 1, Fig. 6a-f are longitudinal sections of the sheet metal disk in the individual stages of manufacture of the sheet metal disk according to Figure 1,

7 is an enlarged view of a portion of the B! Echscheibe nac Figure 2 with a the individual pockets separating web and

8 shows a longitudinal section through an inventive sleeve carrier mi with external teeth. Detailed description of the figures

FIGS. 2 and 3 show two sleeve carriers 1 according to the invention for a synchronizing device of a vehicle interchangeable transmission. The sleeve carriers 1 are constructed in one piece and are made of a meta lbiech produced desse output strength d from the sectional view in Figure 1. Both sleeve carrier 1 are substantially cylindrical rings and have on their outer * mantei 6 an external toothing 3 with teeth 23, 23 'for engagement with not shown: Schiehemuffen and on their inner shells 11 Imienverzahnun- gene 2 with teeth 22, 22' for also not represented Gegenverzahnungen an exhaustion wave on. The internal teeth 2 and di external teeth 3 are connected to each other via disc-shaped base body 4 .. The base body 4 and the two gears 3 _; 2 are manufactured in one piece without joining progess. The two sleeve carriers 1 according to FIGS. 1 and 2 differ in their external toothing 3. The sleeve carrier 1 according to FIG. 2 has three outer toothed segments 13, which are separated from one another by three pruckpiece recesses 10 in the form of windows. In the Drucksiückaussparungen 10 pressure pieces or detents can be arranged. The sleeve carrier 1 of Figure 3 also has three Außenverzahnungssegmente 13, which are connected to each other but upper untoothed ring sections 14. The sleeve carrier 1 have radially between and spaced from the teeth 3, 2 pockets 7, 8, which are directed in the circumferential direction. The pockets 7 are ais displacements of the first end face 15 and the pockets 8 are complementary, in their form the pockets 7 corresponding Durchstel- lungs of the second end face 16 formed. In each axial direction are alternately three pockets 7 _; 8 arranged.

In the variant according to FIG. 7, the individual pockets 7, 8 are spaced apart in the circumferential direction by webs 26. The webs 26 lie in the plane of the original bite disk 5.

Figures 4 and 5 show enlarged to sift pockets 8. The. inside the pockets 8 final inner surface 12 has internal teeth segments 17, 18, which are arranged axially offset from one another and together form the internal toothing. The extent of the axial offset is smaller than the tooth length, so that a longitudinal sectional plane with a circumferential toothing exists. The ends of the internal gear segments 17, 18 are connected via radial walls 24 with the base body 4.

The six figures 6a-f show the longitudinal sections of the sleeve carrier 1 after the individual forming sections. In Figure 6a is shown as a starting body an onde as a punched sheet metal disk 5. The sheet-metal disc 5 is closed, their; End faces 5, 18 are thus each formed by a Voilkreis. As FIG. 6b shows, the perforated disc 5 is initially pre-punched. In the present case, the resulting recess 25 is formed circularly and centrally about the future axis of rotation, its diameter being smaller than that of the later introduced central recess 9 (FIG. 6e).

Subsequently, a Vorziehe and a finishing takes place (Figure 6c) of the pockets from the direction of the first end face 15. The ondenmateriai is pushed out of the lifting level 5 in several stages, the pocket 7 is radially inwardly formed at the lowest. The inside arranged in the pocket 7 groove 19 is bounded by an utwand 20, the back of the later internal teeth 2 biiden will biiden.

As in the previous step, pockets 8 are introduced into the second end face 16 (FIG. 6 d), all groove walls 20 of the pockets 7 and 8 are directed in the circumferential direction and have the same distance from the axis of rotation D.

In the next step (FIG. 6e), the circular ring 21 formed between the groove walls 20 and the pre-punching is removed, for example, by punching. The central recess 9, which corresponds in size to the transmission diameter, is produced by the punching. The axially directed groove walls 20 now form the final one Internal surface 12 of the almost finished sleeve carrier 1> into the inner surface 12 wi d an internal toothing by a multi - stage • drawing process to enable a positive connection with the Getrie - terbome.

Finally, (not shown). Sn the outer surface 6 a Ausset verzah- only g 3 pressed-rolled. The finished outer teeth 3 project out of the axial plane of the sheet-metal disc 5. The external teeth 3 can then be provided with pressure gaps 10. Reference marks

1 sleeve carrier

 2 internal teeth

 3 Au & erwerzahnung

 body

 5 spoons

 6 Ao & enmantel

 7 bag

 8 bag

 9 Central Finishing

 10 pressure piece recess

 11 Snnenmante!

 12 inner surface

 13 Outsourcing Men u

 14 ring section

 15 first end face

 16 second end face

 17 internal gear segment

 18 internal gear segment

 groove

 20 groove wall

 21 circular ring

 22, 222ahn

23, 23 ^: Tooth

 24 Radia! Wall

 Ausnehrnung

 26 Victory d Bjechdicke

 D rotation axis

Claims

Pate nt&n's sayings. Sleeve support (1) for a synchronization device; a raft vehicle change gear, having an internal toothing (2) for connection to a gear shaft, an external toothing (3) for a sliding sleeve and an internal toothing (2) and the external toothing (3) connecting! Base body (4), the inner surface (2), the external teeth (3) and the base body (4) are made in one piece from sheet metal, characterized in that each number (22, 23) of the teeth (2, 3), which is not flanked by a pressure piece recess (10), over its entire axial length a neighboring tooth (22', 23 ^? ) or on the base body (4) is connected, Method for producing a one-piece sleeve support (1), characterized by the following production bulkheads; Providing a sheet metal disk (5) with an outer jacket (6), axially inserting a plurality of pockets (7, 8) into the sheet metal disk (5), Introducing a central recess (9), provided that the sheet metal disc (5) is not already formed as a ring, Insert the external teeth (3) into the outer casing (6) of the bending disc (5). Method according to claim 2, characterized in that the external toothing (3) is rolled. Method according to claim 2 or 3, characterized in that an internal toothing (12) is introduced into the inner manifold (11) of the sheet metal disc (5) by one or more drawing processes. 5, method according to one of ^claims 2 to 4, characterized in that the sheet metal disk (5) is first formed into a ^ring . 6.. Method according to one of claims 2 to S., characterized in that the pockets (7, 8) are introduced at a distance from the lateral surfaces {6 _t 11), 7. The method according to one of claims 2 to 8, characterized in that the pockets (7, 8} are introduced by one or more pulling processes. 8. The method according to one of claims 2 to 7, characterized in that the external toothing (2) is provided with pressure piece recesses (10). 9. The method according to any one of claims 2 to 8, characterized in that the central recess (9) is introduced by drilling or punching after the pockets (7, 8} have been introduced. 10. The method according to any one of claims 2 to 9, characterized in that the IVF carrier (1) is nitrocarburized.