WO2018202230A1

WO2018202230A1 - Shifting device

Info

Publication number: WO2018202230A1
Application number: PCT/DE2018/100237
Authority: WO
Inventors: Pierre-Yves Berthelemy
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2017-05-03
Filing date: 2018-03-16
Publication date: 2018-11-08
Also published as: DE102018106130A1; KR20200002869A; KR102560515B1; DE112018002270A5

Abstract

The invention relates to a shifting device (10) for synchronization in a transmission (1) having at least two gearwheels (3, 4) which are arranged rotatably on a transmission shaft (5), and having a synchronizing device (6) which comprises a slider sleeve (9) which can be displaced axially for synchronizing rotational speeds of the transmission shaft (5) and one of the gearwheels (3, 4). In order to simplify the synchronizing, the shifting device (10) comprises a sleeve-like guide body (35) which is fastened axially fixedly and rotationally fixedly to an outer housing (2).

Description

switching device

The invention relates to a switching device for synchronization in a transmission with at least two gears, which are rotatably mounted on a transmission shaft, and with a synchronizer, which summarizes an axially synchronized for synchronizing rotational speeds of the transmission shaft and one of the gears sliding sleeve.

From the German patent application DE 10 201 1 007 266 A1 discloses a switching device with at least one coupling device, a shaft, with an axially displaceable and rotationally fixed to the shaft arranged shift sleeve of the coupling device and with an actuator assembly of the coupling device for axial displacement of the sliding sleeve shift known wherein at least one coupling toothing and the sliding sleeve at least one corresponding with the coupling teeth counter teeth is rotatably associated with the rotatable about an axis of rotation coupling element and at least one annular actuator element of the actuator assembly surrounds the switching sleeve on the circumference around the axis of rotation, wherein the annular Actuator element is at least one shift drum with at least one guideway, wherein a standing with the sliding sleeve in connection guide member engages radially in the guideway and wherein the shift drum about the rotation axis z at least pivotable and thereby is movable relative to the guide element with the guide track.

The object of the invention is to simplify the synchronization in a transmission with at least two gears, which are rotatably mounted on a transmission shaft, and with a synchronizer, which comprises a synchronizing of rotational speeds of the transmission shaft and one of the gears axially displaceable sliding sleeve , The object is achieved in a switching device for synchronization in a transmission with at least two gears which are rotatably mounted on a transmission shaft, and with a synchronizer, which summarizes a synchronizing of rotational speeds of the transmission shaft and one of the gears axially displaceable sliding sleeve, thereby achieved in that the switching device comprises a sleeve-like guide body, which is fastened axially fixed and rotationally fixed to an outer housing. This outer housing is, for example, the transmission housing, or a part thereof. It may also be a housing-fixed with respect to the transmission housing further component. The sleeve-like guide body is in operative connection with the axially displaceable sliding sleeve, so that it can be moved accordingly. To produce this operative connection, the sleeve-like guide body has, for example, a guide, link, geometry or housing geometry. The sliding sleeve is non-rotatably connected with the gear shaft in a manner similar to that of conventional sliding sleeves or sliding sleeves. The switching device allows, in contrast to conventional switching devices, a pivoting operation of the synchronizer with the sliding sleeve in a rotational direction concentric or coaxial with the transmission shaft. The pivoting actuating movement of the switching device is converted in the switching device into an axial movement of the sliding sleeve. The term axial refers to a rotation axis of the transmission shaft. Axial means in the direction or parallel to the axis of rotation of the gear shaft. Analog means radially transversely to the axis of rotation of the transmission shaft. The axially fixed and rotationally fixed attachment of the sleeve-like guide body to the outer housing of the transmission provides, among other things, the advantage that it is possible to dispense with friction points impairing the efficiency of the transmission.

Just to enable the pivoting operation, the switching device further comprises an operating wheel, which is in operative connection with the displacement of the sliding sleeve with this.

A preferred embodiment of the switching device is characterized in that the sleeve-like guide body has radially outwardly bent tabs, which serve for attachment to the outer housing and for displaying stops for limiting a rotational movement of a control wheel. The On the outside of the sleeve-like guide body angled tabs thus have a double function. By the stopper function of the tabs used for operating the switching device pivoting movement or rotational movement of the operating wheel can be easily and effectively limited. The attachment of the tabs on the housing can be done for example by fasteners, such as screws o rivets. The sleeve-like guide body with the tabs is advantageously designed as a sheet metal part. The operating wheel is advantageously also designed as a sheet metal part. A further preferred embodiment of the switching device is characterized in that the actuating wheel has a toothed ring with an external toothing, which extends axially between the toothed wheels and has a larger outer diameter than at least one of the toothed wheels. This can be applied to the switching device in a simple manner from the outside, that is from outside the gears, a pivoting actuating movement or a rotational movement. The toothed ring can also be arranged completely outside at least one of the toothed wheels. By the pivoting operation from the outside of the space required for the transmission with the gears and the switching device axial space can be advantageously reduced to a minimum.

A further preferred embodiment of the switching device is characterized in that radial tab portions of the tabs of the sleeve-like guide body are arranged in the same plane as spoke-like connecting body, which connect the toothed ring of the actuating wheel with a sleeve-like actuating body of the operating wheel. The radial tab portions allow in a simple manner an arrangement of the toothed ring of the actuating wheel outside of at least one of the gears. The spoke-like connecting body of the actuating wheel advantageously have a dual function. Together with the radial tab portions, the spoke-like connecting bodies advantageously constitute stops which limit a rotational movement or pivotal movement of the actuating wheel. The sleeve-like actuating body is advantageously integrally connected by the spoke-like connecting body with the toothed ring of the actuating wheel. A further preferred embodiment of the switching device is characterized in that the sleeve-like actuating body of the actuating wheel has a guide, a link, a geometry or a thread geometry, which is in operative connection with the displacement of the sliding sleeve.

It is particularly preferably provided that the sleeve-like actuating body of the actuating wheel has a guide, link, geometry or thread geometry for a threaded ring. The preferred thread geometry here comprises at least one thread, in which, for example, threaded pieces are guided, which protrude from the threaded ring. The thread geometry makes it possible in a simple manner, to convert a rotational movement or pivotal movement of the actuating wheel in an axial movement of the sliding sleeve.

A further preferred embodiment of the switching device is characterized in that the sleeve-like guide body has a guide, link, geometry or thread geometry, which is operatively connected to the displacement of the sliding sleeve.

It can be provided that the sleeve-like guide body has a guide, link, geometry or thread geometry for a threaded ring. The preferred thread geometry here also comprises at least one thread in which, for example, threaded pieces are guided, which protrude from the threaded ring. About the thread geometry can be easily converted into a rotational movement or pivotal movement of the actuating wheel in an axial movement of the sliding sleeve.

A further preferred embodiment of the switching device is characterized in that the threaded ring project from the threaded ring, which are guided in the thread geometry and engage in recesses provided in the sleeve-like actuating body or in the sleeve-like guide body and prevent co-rotation of the screw ring. This ensures in a simple manner that the threaded pieces move in the axial direction when the operating wheel is pivoted or rotated. The threaded pieces are advantageously arranged in the axial direction between two stop rings, which in turn are axially coupled to the sliding sleeve. This is achieved in a simple manner that an axial movement of the threaded pieces is transmitted to the sliding sleeve. A further preferred embodiment of the switching device is characterized in that the sleeve-like guide body cooperates for the representation of a threaded mechanism with the threaded ring and the sleeve-like actuating body of the actuating wheel. As a result, a conversion of a pivoting or rotating actuating movement of the actuating wheel into an axial movement of the sliding sleeve is converted in a simple manner.

A further preferred embodiment of the switching device is characterized in that the switching device is arranged radially inside the gears and in the axial direction overlapping to the gears. As a result, a space available in the interior of the gear wheels can be optimally utilized in a simple manner in order to synchronize the gear shaft with one of the gear wheels. Particularly advantageous only the ring gear of the actuating wheel is arranged radially outside of at least one of the gears or of both gears. The invention further relates to a sleeve-like guide body, an operating wheel and / or a threaded ring for a previously described switching device. The parts mentioned are separately tradable.

If appropriate, the invention also relates to a transmission with at least two toothed wheels and with a switching device described above.

Optionally, the invention also relates to a method for synchronizing in a transmission with a previously described switching device. Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it: Figure 1 shows a part of a transmission with two gears on one

Transmission shaft are rotatably arranged, and with a

Synchronizing device, which is pivotally actuated by a switching device, in a first sectional view;

Figure 2 second sectional view of the transmission of Figure 1; the switching device of Figures 1 and 2 alone in an exploded view; a perspective sectional view of the switching device

FIG. 3; a perspective sectional view of the transmission of Figures 1 and 2;

Figure 6 is a perspective sectional view of a variant of

Switching device of Figure 4 and Figure 7 is an exploded view of the switching device of Figure 6.

In the figures 1, 2 and 5, a part of a transmission 1 is shown with an only indicated outer housing 2 in different sections. The transmission 1 comprises two toothed wheels 3, 4 which are rotatably arranged on a gear 5 indicated only by a reference numeral. In operation of the transmission 1 speeds of the transmission shaft 5 and the gears 3, 4 can be synchronized by means of a synchronizer 6.

The synchronizing device 6 is preferably designed as a multi-cone synchronizing device in order to keep the switching force required for synchronizing low. However, the synchronizing device 6 can also, as shown in FIGS. 1, 2 and 5, be designed as a standard one-cone synchronizing device. The illustrated synchronizer 6 comprises a sleeve carrier 8, on which a sliding sleeve 9 is axially displaceable. The sliding sleeve 9 can be pivoted by means of a switching device 10. The switching device 10 is arranged between the two gears 3 and 4.

The gears 3, 4 are rotatably mounted on the transmission shaft 5 (not shown). A coupling body 1 1 is fixedly connected to the gear 3. A coupling body 12 is fixedly connected to the gear 4. A synchronous cone 13; 14 is fixed to the coupling body 1 1; 12 connected. A synchronizer ring 15; 16 has at the inner diameter on a friction cone not specified.

FIG. 2 shows that the sliding sleeve 9 is assigned a plurality of, in particular three, pressure pieces 21. The plungers 21 each include a spring 23, through which a positive locking element, such as a ball 24, is biased radially outwardly against the sliding sleeve 9.

An axial movement is applied via a screw ring 30 on the sliding sleeve 9. The screw ring 30 is arranged in the axial direction between two stop rings 31, 32. The stop rings 31, 32 are firmly connected to the sliding sleeve 9. An axial movement of the screw ring 30 is transmitted to the sliding sleeve 9 via the stop rings 31, 32. The screw ring 30 is, as seen in Figures 3 and 4, part of a threaded mechanism 34. The threaded mechanism 34 comprises a sleeve-like guide body 35. The sleeve-like guide body 35 has radially outwardly bent tabs 36, 37. About the screw ring 30, an operative connection between the sleeve-like guide body 35 and the sliding sleeve 9 is made in this case.

In Figure 1 it is indicated that the tabs 36, 37 are attached to the outer housing 2 of the transmission 1. The attachment of the tabs 36, 37 on the outer housing 2 of the transmission 1 takes place for example by means of fastening elements, not shown, such as screws. The tabs 36, 37 include radial tab portions 38, 39. In Figure 1 it can be seen that the radial portion 38 of the tab 36 is disposed in a plane with an actuating wheel 40.

The actuating wheel 40 comprises a toothed ring 41 with external teeth 42. The toothed ring 41 is integrally connected to a sleeve-like actuating body 45 via spoke-like connecting bodies 43, 44. The sleeve-like actuating body 45 has, as can be seen for example in Figure 3, radially inwardly recesses 46, 47.

The sleeve-like guide body 35 is equipped with a thread geometry 48. In this case, the sleeve-like guide body 35, which is a threaded sleeve, advantageously designed so stiff that it can withstand the axial forces occurring during operation of the switching device 10, without the sleeve-like guide body 35 is supported axially left or right rotating parts of the transmission 1.

These axial forces are advantageously supported via the tabs 36, 37 on the outer housing 2 of the transmission 1. The described Axialabstützung on the outer housing 2 of the transmission 1 is particularly advantageous for adjacent gears 3, 4 with a relatively large difference in diameter, ie a relatively large increment.

A radial distance between the sleeve-like guide body 35 and the Abstützung on the housing 2 through the tabs 36, 37 may advantageously remain small. As a result, a lever arm of the tabs 36, 37 can also be kept small in a simple manner. This in turn provides the advantage that the tabs 36, 37 can be constructed relatively thin. The tabs 36, 37 are advantageous only a few millimeters thick. The screw ring 30 has radially outside a plurality of threaded pieces 51, 52, 53. The threaded pieces 51 to 53 are guided in threads or threaded slots of the thread geometry 48 of the sleeve-like guide body 35. The sleeve-like guide body 35 shown in Figure 3 comprises a total of three threaded slots, in each of which a threaded piece 51, 52, 53 runs. At the left in Figure 3 end of the sleeve-like guide body 35, a closure ring 49 is mounted, which serves to stiffen the end of the sleeve-like guide body 35.

The tabs 36, 37 on the sleeve-like guide body 35 are advantageously angled so that the radial tab portions 38, 39 are arranged in the same plane as the spoke-like connecting body 43 and 44 and the toothed ring 41. This provides in particular the advantage that only a single sheet thickness is needed to represent a rotary feedthrough. Therefore, the illustrated switching device 10 can be made very compact axially.

Differently than illustrated, the sleeve-like guide body 35 can also be designed without open threaded slots, for example in order to save the locking ring 49. In this case, the sleeve-like guide body 35 can also be made in two parts.

The screw ring 30 is rotationally actuated by means of the sleeve-like actuating body 45 of the actuating wheel 40. The sleeve-like actuating body 45 of the actuating wheel 40 can be moved around the sleeve-like guide body 35. The movement of the sleeve-like actuating body 45 is applied via an actuator (not shown) to the external teeth 42 of the toothed ring 41 of the actuating wheel 40.

The threaded pieces 51 to 53 of the screw ring 30 are designed and designed such that the thread flanks are guided in the threaded slots of the thread geometry 48. The sleeve-like actuating body 45 is advantageously centered on the sleeve-like guide body 35. The sleeve-like guide body 35 remains fixed by its connection to the outer housing 2 with the preferably three tabs 36, 37. In this case, the tabs 36, 37 advantageously represent stops, in particular rotational stops, for the actuating wheel 40. The spoke-like links are used to illustrate the stops. body 43, 44 of the actuating wheel 40 in the same plane as the radial tab portions 38, 39 of the tabs 36, 37 are arranged.

An operating angle for the pivoting operation of the switching device 10 is in the illustrated construction at about plus / minus forty degrees. The angle can be adjusted by means of different thread pitches. Theoretically, a single threaded slot is sufficient. Advantageously, however, more than one threaded slot or thread, for example three, threaded slots in the thread geometry 48 are provided.

FIGS. 6 and 7 show an alternative embodiment of a threaded mechanism 64 with a threaded ring 60 in various views. The threaded mechanism 64 comprises a sleeve-like guide body 65, which is fastened by means of tabs 66, 67 on the outer housing (2 in Figure 1) of the transmission.

The tabs 66, 67 include radial tab portions 68, 69 disposed in the same plane as spoke-like connecting bodies 73, 74 of an operating wheel 70. The actuating wheel 70 comprises a toothed ring 71 with external toothing 72. The toothed ring 71 is integrally connected to a sleeve-like actuating body 75 by the spoke-like connecting bodies 73, 74. The sleeve-like guide body 65 has recesses 76, 77 in the region of the tabs 66, 67.

In contrast to the threaded mechanism 34 shown in FIGS. 3 and 4, in the case of the threaded mechanism 64 shown in FIGS. 6 and 7, a thread geometry 78 is provided on the sleeve-like actuating body 75 of the actuating wheel 70. In the thread geometry 78, the threaded pieces 81, 82 of the screw ring 60 are guided. With their free ends, the threaded pieces 81, 82 of the screw ring 60 protrude into the recesses 76, 77 of the sleeve-like guide body 65. Otherwise, the threaded mechanism 64 functions in the same way as the previously described threaded mechanism 34. Again, the sleeve-like guide body 65 and the operating wheel 70 are above the sleeve-like actuator body 75 for axial displacement with the sliding sleeve 9 in operative connection. The same applies to the sleeve-like guide body 35, the operating wheel 40 and the sleeve-like actuating body 45, as shown in Figures 3 and 4 and described in accordance with these figures.

The switching device 10 can be advantageously used in automated or manual transmissions. With the switching device 10 different speeds between a gear wheel to be switched, which is also referred to as idler gear, and the fixed to the transmission shaft 5 sleeve carrier 8 can be adjusted.

LIST OF REFERENCES

transmission

outer casing

gear

gear shaft

synchronizer

sleeve carrier

sliding sleeve

switching device

clutch body

synchronizer cone

synchronizer ring

Pressure piece

feather

Bullet

screw ring

1 stop ring

thrust ring

screw mechanism

sleeve-like guide body

flap

radial tab section

9 radial tab section

0 operating wheel

1 toothed ring

2 external teeth spoke-like connecting body spoke-like connecting body sleeve-like actuating body recess

recess

thread geometry

lock ring

threaded piece

screw ring

screw mechanism

sleeve-like guide body tab

flap

radial tab portion radial tab portion

operating wheel

toothed ring

external teeth

spoke-like connecting body spoke-like connecting body sleeve-like actuating body recess

recess

thread geometry

threaded piece

Claims

claims

1 . Switching device (10) for synchronization in a transmission (1) with at least two gears (3,4), which are rotatably mounted on a transmission shaft (5), and with a synchronizing device (6) having a synchronizing of rotational speeds of the transmission shaft ( 5) and one of the toothed wheels (3, 4) axially displaceable sliding sleeve (9), characterized in that the switching device (10) comprises a sleeve-like guide body (35, 65) axially fixed and rotationally fixed to an outer housing (2) is fixed and for the axial displacement of the sliding sleeve (9) is in operative connection with this.

2. Switching device according to claim 1, characterized in that the switching device (10) has an operating wheel (40,70), which is in operative connection for displacement of the sliding sleeve with this.

3. Switching device according to claim 1 or 2, characterized in that the sleeve-like guide body (35; 65) radially outwardly angled tabs (36,37; 66,67), which for attachment to the outer housing (2) and preferably for illustration of stops for limiting a rotational movement of an actuating wheel (40; 70) are used.

4. Switching device according to claim 2 or 3, characterized in that the actuating wheel (40; 70) has a toothed ring (41; 71) with external teeth (42; 72) which extends axially between the toothed wheels (3,4) and a larger outer diameter than at least one of the gears (3,4).

5. Switching device according to claim 4, characterized in that radial tab sections (38, 39, 68, 69) of the tabs of the sleeve-like guide body (35, 65) are in the same plane as spoke-like connecting bodies

(43,44; 73,74) are arranged, which connect the toothed ring (41; 71) of the actuating wheel (40; 70) with a sleeve-like actuating body (45; 75) of the actuating wheel (40; 70).

6. Switching device according to claim 4, characterized in that the sleeve-like actuating body (75) of the actuating wheel (70) has a guide, link, geometry or thread geometry (78) which is in operative connection with the displacement of the sliding sleeve (9).

7. Switching device according to claim 6, characterized in that the sleeve-like actuating body (75) of the actuating wheel (70) has a guide, link, geometry or thread geometry (78) for a screw ring (60).

8. Switching device according to one of claims 1 to 6, characterized in that the sleeve-like guide body (35) has a guide, link, geometry or thread geometry (48) for the displacement of the sliding sleeve

(9) is in operative connection with this.

9. Switching device according to claim 8, characterized in that the sleeve-like guide body (35) has a guide, link, geometry or thread geometry (48) for a screw ring (30).

10. Switching device according to one of claims 7 or 9, characterized in that of the threaded ring (30; 60) threaded pieces (51-53; 81, 82) protrude, which in the thread geometry (48; 78) are guided and in recesses (46,47; 76,77) which are provided in the sleeve-like actuating body (45) or in the sleeve-like guide body (65) and prevent co-rotation of the screw ring (30; 60).

1 1. Switching device according to one of claims 7, 9 or 10, characterized in that the sleeve-like guide body (35; 65) for the representation of a threaded mechanism (34; 64) with the screw ring (30; 60) and the sleeve-like actuating body (45; 75) of Actuator (40, 70) cooperates.

12. Switching device according to one of the preceding claims, characterized in that the switching device (10) radially within the gears (3,4) and in the axial direction overlapping to the gears (3,4) is arranged.

13. Sleeve-like guide body (35, 75), operating wheel (40, 70) and / or

Screw ring (30; 60) for a switching device (20) according to one of the preceding claims.