Plug toothing with circular or annular spring element

Abstract

The invention relates to a shaft connection (40) between a first shaft (12) having a first toothing (14) and a second shaft (22) having a second toothing (16). At least one spring element (42, 44, 80, 86, 88) in the form of a ring or a pin is accommodated on the first shaft (12), which centers the first shaft (12) relative to the second shaft (22) or vice versa. The invention also relates to a shaft-hub-connection (76) between a shaft (72) having a drive tooth (84, 92) and a hub (74) having a groove (82) in the circumferential direction. The drive tooth (84, 92) is either wound by an annular spring element (42, 44, 86) or is provided with a pin-shaped spring element (80, 88) which supports the drive tooth (84, 92) in the groove (82) of the hub (74) in the circumferential direction.

Description

Technical Field

[0001] The invention relates to a plug toothing having a circular or annular spring element which serves to center and damp a force transmission via the plug toothing. The invention also relates to a use of the plug toothing for transmitting torque. Background Art

[0002] In order to transmit or conduct the torque transmitted by the shaft through the gear, a good shaft-hub connection is required. The connection possibility of the shaft-hub connection is provided by a plug-in toothing with a gap. This standardized shaft-hub connection with a form fit and a gap in the form of a plug-in toothing has the disadvantages of unlimited gap and defective centering. This leads to tooth flank impact or tooth flank misalignment when transmitting torque through the gear. This produces undesirable noise and an asymmetric load diagram (Tragbild) of the toothing and a point-like rotational load transmission. As another disadvantage, it is mentioned that the bearing load is increased by about 25% in this plug-in toothing, and it is also mentioned that the power loss is significantly increased and the resulting shortened service life expectation of the participating force transmission elements and bearings.

[0003] DE 10 2015 200 661 A1 relates to a clutch device with an electromagnetic actuator. The clutch device comprises a rotatably driven transmission having at least one sleeve-type attachment for rotatably mounting in a stationary housing. In addition, an output component is provided which is rotatably arranged in the transmission housing, and a clutch is provided which is arranged in a power path between the transmission housing and the output component. The clutch comprises a first clutch component, which is held rotationally fixed and axially movable relative to the transmission housing, and a second clutch component which is fixedly connected to the output component and arranged in the transmission housing. A controllable actuator is used to actuate the clutch in such a way that the first clutch component and the second clutch component can be selectively connected to each other to transmit torque. The actuator comprises an annular electromagnet which is arranged coaxially with the sleeve-type attachment of the transmission housing, and which has a magnet housing and an axially movable piston.

[0004] DE 10 2015 200 465 A1 relates to a differential device for a vehicle. The differential device comprises a first housing section, wherein the first housing section is designed to support the sun gear and / or the differential device on a surrounding structure. In addition, a second housing section is provided, and a drive wheel section and a fixing component are also provided, wherein the fixing component, the second housing section and the drive wheel section are connected to each other via a threaded connection and form a screwed assembly. The screwed assembly forms a positive-fitting receptacle, wherein the first housing section is accommodated in the positive-fitting receptacle.

[0005] DE 10 2012 213 405 A1 relates to a bevel gear differential for a vehicle. The bevel gear differential comprises an outer wheel with a differential cover, wherein the differential cover is fixedly connected to the outer wheel via at least one connecting region. The differential cover has at least one web region, on which a compensating wheel is arranged, wherein the axis of rotation of the compensating wheel defines the compensating axis direction in an axial top view of the bevel gear differential. In the axial top view, a compensating angle range of at least + / - 20° around the compensating axis direction is freed up by the at least one connecting region. Summary of the invention

[0006] According to the invention, a shaft connection between a first shaft having a first toothing and a second shaft having a second toothing is proposed, wherein at least one spring element in the form of a ring or a pin is accommodated on the first shaft, the at least one spring element centering the first shaft relative to the second shaft or vice versa.

[0007] Furthermore, according to the invention, a shaft-hub connection is proposed between a first shaft having a gear tooth and a hub having a groove in the circumferential direction, wherein the gear tooth is either wrapped by an annular spring element or alternatively provided with a pin-shaped spring element, which supports the gear tooth in the groove of the hub in the circumferential direction.

[0008] Advantageously, the two embodiments of the solution proposed according to the invention make it possible to realize a shaft connection, in particular a plug-in tooth connection, and a shaft-hub connection in such a way that the occurrence of tooth flank impacts is significantly reduced due to the centered guidance. By appropriately dimensioning both the annularly configured elastic element and the pin-shaped elastic element, an optimization with regard to loads and assembly forces can be achieved depending on the individual load situation.

[0009] In two further developments of the solution proposed according to the invention, the shaft connection or shaft-hub connection can be designed in such a way that the spring element is designed as a rolled-up spring ring in which the spring ring start and the spring ring end are connected to one another at a connection point. This embodiment variant of the spring element is characterized by particularly simple production with any possible dimensioning possibilities.

[0010] In a refinement of the solution proposed according to the invention, the spring element can be designed as a rolled spring ring, which is made of spring wire with a diameter in the range between 0.2 mm and 0.5 mm and has a spring diameter between 1.2 mm and 5 mm. The spring element as a rolled spring ring is preferably made of spring steel wire, stainless spring steel wire or of material EN 10270-3-14310.

[0011] In a further development of the solution proposed according to the invention, the spring element can alternatively be produced from a spring steel sheet as a punched spring ring. When the spring element is produced as a punched spring ring, the first cross section and the second cross section are formed in the spring element in an alternating sequence as viewed in the circumferential direction. After the spring element is punched out of the spring steel sheet, the resulting punched spring steel sheet is bent so that an annular hollow body is formed, on which the first and second cross sections extend in an alternating sequence in the circumferential direction. In the shaft connection or shaft-hub connection proposed according to the invention, a longitudinal groove can be formed on the drive tooth in the root region, which is used to accommodate a pin-shaped spring element in the form of a helical spring or a clamping pin.

[0012] In order to impart elasticity to the inserted pin-shaped spring element designed as a clamping pin, the clamping pin is provided with longitudinal slits on its circumference, which serve to ensure the spring effect.

[0013] In the shaft connection or in the shaft-hub connection proposed according to the invention, the spring element on the first shaft or the second shaft can be accommodated in a groove, which is centered relative to each other at the shaft connection and extends in the circumferential direction on the first shaft or the second shaft.

[0014] In an advantageous embodiment variant of the shaft connection according to the invention or the shaft-hub connection according to the invention, the longitudinal groove can be formed in the root region of the two tooth flanks of the drive tooth. In this case, the possibility is advantageously provided for centering the assembly of the shaft-hub connection without play on a shaft-hub connection between a shaft and a hub having a groove in the circumferential direction, on which the drive tooth is received with a pin-shaped spring element introduced into the longitudinal groove, wherein playlessness exists both in a first rotational direction and in a second rotational direction opposite to the first rotational direction.

[0015] The invention also relates to the use of a shaft connection as a plug-in toothing of two shafts in a transmission of an E-axle module of an electrically driven vehicle. The invention also relates to the use of a shaft-hub connection between a shaft and a hub in an E-axle module of an electrically driven vehicle. The invention also relates to the use of a shaft connection or the same hub connection in a transmission of a vehicle driven by an internal combustion engine, a hybrid vehicle (HEV) or a plug-in hybrid vehicle (PHEV).

[0016] The advantages of the centered and play-free shaft connection proposed according to the invention, which is preferably configured as a plug toothing, and the centered and play-free shaft-hub-connection proposed according to the invention are the improved bearing diagram of the toothing with respect to the plug toothing and with respect to the play-freeness that can be achieved with the solution proposed according to the invention, which applies not only to the shaft connection but also to the play-free, non-centered shaft-hub-connection. The inserted annular and pin-shaped spring elements serve as vibration dampers and can be assembled with relatively small assembly and disassembly forces. By using annular or pin-shaped spring elements, transmission power losses can be reduced and imbalances can be avoided. In addition, transmission shocks can be excluded, and the running smoothness of the corresponding shaft connection, especially the plug toothing, and the running smoothness of the shaft-hub-connection can be significantly improved, thereby generating low-noise operation. By reducing vibrations and correcting the bearing diagram, a significantly longer service life is expected. In addition, the solution proposed according to the invention provides a very economical solution by using spring wire for the manufacture of spiral springs or rest springs (Simmeringfeder) or spring rings as stamped and bent parts made of spring steel sheets.

[0017] By choosing the appropriate spring material, whether spring steel sheet or spring wire, and the variability of the spring wire diameter, which can vary between 0.2 mm and 5 mm, and the spring diameter in the range of 1.2 mm to 5 mm, it is possible to optimize the load and the assembly force in the spring element. The materials used, the spring steel sheet and the rolled spring wire allow for a wide range of possible uses in terms of the geometry and dimensioning of the spring element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Embodiments of the present invention are further explained with the aid of the drawings and the following description. It is shown in the drawings:

[0019] Figure 1 shows the plug-in tooth connection without centering means and the resulting tilted position of the two shafts relative to one another,

[0020] Figure 2 A first embodiment variant of the shaft connection part proposed in the present invention is shown.

[0021] Figure 3 A spring element designed as an annular spring is shown,

[0022] Figure 3.1 The connecting part between the spring ring start end and the spring ring end of the annular spring is shown.

[0023] Figure 3.2 An arrangement showing the tensioning of a coiled spring wire is shown,

[0024] Figure 3.3 An enlarged view of the beginning and end of the annular spring is shown.

[0025] Figure 3.4 shows a schematic diagram of an annular spring,

[0026] Figure 4 shows a top view of a spring element stamped from a spring steel sheet,

[0027] Figure 4.1 Shown according to Figure 4 A partial enlarged view of

[0028] Figure 4.2 A first cross section is shown,

[0029] Figure 4.3 Showing the second cross section

[0030] Figure 5 A diagram showing a shaft-hub connection between a shaft having gear teeth and a hub designed as a gear,

[0031] Figure 5.1 A perspective view showing the placement of the coil spring,

[0032] Figure 5.2 shows a perspective view of a shaft with drive teeth each with a wound helical spring,

[0033] Figure 6 A schematic diagram showing the forces occurring on a drive tooth which engages in a groove in the circumferential direction of the hub,

[0034] Figure 7 shows an enlarged view of the shaft end with a drive tooth and a longitudinal groove for accommodating a clamping pin,

[0035] Figure 8 shows an illustration of a clamping pin having a longitudinal slit, and

[0036] Fig. 9 Shown according to Figure 7 An enlarged top view of the end side of the shaft end. DETAILED DESCRIPTION

[0037] In the following description of embodiments of the invention, identical or similar elements are denoted by the same reference numerals, wherein a repeated description of these elements is not performed in individual cases. The figures merely schematically illustrate the subject matter of the invention.

[0038] Figure 1 A shaft connection designed as a plug-and-socket connection with play is shown. Figure 1 , the first shaft 12 is provided with a first toothing 14 designed as an external toothing. On the second shaft 22 designed as a hollow shaft there is a second toothing 16, which is designed as an internal toothing in this case. A gear 18 is accommodated on the first shaft 12, while the second shaft 22 is provided with a rotor 20. The plug toothing 10 with play is supported in a triple bearing 24. The axis of symmetry is provided with reference numeral 26. Reference numeral 28 indicates the inclined position of the first shaft 12 relative to the second shaft 22, which is due to the Figure 1 1. The inclined position 28 means the occurrence of vibrations, an inclined load pattern of the tooth flanks of the teeth relative to the first toothing 14 and the second toothing 16, and leads to increased noise generation during the service life, which is detrimental to the service life of the plug toothing 10 shown with play. For a good arrangement, it should be mentioned that the triple bearing 24 includes a first bearing 30, a second bearing 32 and a third bearing 34, all of which are designed as ball bearings.

[0039] In contrast, Figure 2 An embodiment variant of the centered and play-free shaft connection 40 proposed according to the invention is shown.

[0040] If Figure 2 It is known that a first spring element 42 is accommodated on the circumference of the first shaft 12, and a second spring element 44 is accommodated spaced apart from the first spring element. The two spring elements 42, 44 are designed as spring rings 46, respectively. The dimensions of the two spring elements 42, 44, which are constructed in an annular manner as spring rings 46, are determined so that the outer circumference of the spring elements presses against the tooth tip circle of the second toothing 16, that is, against the tooth tip circle of the inner toothing on the second shaft 22, that is, the hollow shaft, and thus the second shaft is centered relative to the first shaft 12. In addition, by pressing out a gap from the shaft connection 40 by the spring elements 42, 44 accommodated in a circumferential groove on the first shaft 12 spaced apart from each other, the running smoothness and the load-bearing pattern between the teeth of the first toothing 14 and the teeth of the second toothing 16 are significantly improved. According to Figure 2 As can be seen from the illustration, the first spring element 42 configured as a spring ring 46 and the second spring element 44 also configured as a spring ring 46 are located next to the first toothing 14 of the first shaft 12. Therefore, the two spring elements 42, 44 configured as spring rings 46 are positioned so that they are located next to the tooth surface contact between the first toothing 14 and the second toothing 16.

[0041] from Figure 3 It can be seen that a spring ring 46 is accommodated on the circumference of the first shaft 12. The spring ring 46 is designed as a spiral spring; the spring ring start 48 and the spring ring end 50 (see Figure 3.1 ) are connected to each other at the connection point 52.

[0042] In accordance with Figure 3.1 In the illustration, the spring ring 46 is shown in a curved geometric shape, while Figure 3.2 In the embodiment, the spring ring start end 48 and the spring ring end 50 are in a stretched position. Figure 3.1 The illustration of shows that the spring washer start 48 is inserted into the spring washer end 50 and that a connection point 52 is thus formed between the spring washer start 48 and the spring washer end 50 .

[0043] Depend on Figure 3.3 It is known that the spring ring 46 is made of a wound spring wire. The spring wire, which can be a stainless steel spring wire or a material called EN 10270-3-14310, has a wire diameter 54 in the order of magnitude of between 0.2 mm and 0.5 mm. The spring diameter 56 is in the order of magnitude of between 1.2 mm and 5 mm. Depending on the selection of the wire diameter 54 and the spring diameter 56, the elasticity or damping characteristics and the forces to be applied for assembly and disassembly can be adapted to the respective application.

[0044] Reference numeral 57 denotes the following spring length, which is obtained by the spring ring start 48 and the spring ring end 50 being joined together at the connection point 52 when the wound spring wire (such as from according to Figure 3 The wound spring wire occupies this spring length over its longitudinal extension before it can be transformed into the shape of a spring ring 46 over its stretched length (as can be seen in the illustration of FIG. 4 ).

[0045] Depend on Figure 3.4 The approximately rectangular outline of the rolled-up spring ring 58 can be seen. Such a component can be curved in a circular manner or can also be curved in a circular manner. Figure 3.4 The depicted profile has a substantially rectangular extension.

[0046] Figure 4 1 shows a diagram of a stamped spring ring 60. The spring ring 60 shown here is stamped from a spring steel sheet 62. For the shaping of the stamped spring ring 60, spring tongues of a first cross section 66 and spring sections of a second cross section 68 are stamped in alternating order in the circumferential direction. Figure 4.1 The material of the spring steel sheet 62, which is shown as a development 64 in the X / Y plane, is then bent into a circle so that a first cross section 66 is obtained. Figure 4.2The first cross section 66 shown in FIG. 6 and the two first cross sections 66 are respectively formed according to Figure 4.3 The first cross section 66 and the second cross section 68 extend in an alternating order along the circumferential direction of the stamped spring ring 60. Figure 2 In the case where the opening is retained on the first cross section 66, the stamped ends of the tongues just do not touch each other. Figure 4.2 The stamped spring ring 60 shown in FIG. 1 , ie in the bent state, acquires elasticity which imparts damping or spring properties to the spring ring.

[0047] Alternative Figure 2 The first and second spring elements 42, 44 shown in FIG. 1 and designed as rolled-up spring rings 58, which are configured as spring rings 46, can also be used alternatively according to Figure 4 , 4.1 , the stamped spring ring 60 of the embodiments in 4.2 and 4.3.

[0048] Figure 5 The shaft-hub connection 76 between the hub 74 and the shaft 72 is shown, on the circumference of which a plurality of, in this case four, projections 84 or protrusions in the form of gear teeth 92 are formed. Figure 5 In the illustration of FIG. 7 , four projections 84 or four drive teeth 92 are formed on the shaft 72 at 90° intervals.

[0049] exist Figure 5.2 , each of the projections 84 or drive teeth 92 is wound around a wound helical spring 86, which is designed as a ring here. The wound helical spring 86 is introduced into the following longitudinal groove 94, which extends at each of the projections 84 or drive teeth 92 to its root area, that is, at the circumference of the outer circumference of the shaft 72. The longitudinal groove 94 is as shown in the embodiment according to Figure 5.2 As shown in the figure, the axis of symmetry extends in the axial direction parallel to the shaft 72. Figure 5.1 An enlarged view of a detail of the projection 84 or of the drive tooth 92 with the helical spring 80 introduced into the longitudinal groove 94 is shown. Figure 5.1 As can be seen from the illustration of , the helical spring 80 is made of a rolled-up spring wire material. The helical spring 80 introduced into the longitudinal groove 94 presses out the tooth flank gap 78 which would otherwise occur between the contact surface 96 of the groove 82 extending in the circumferential direction of the hub 74 and the drive tooth 92 engaging therein. Figure 5.1 In the embodiment, the coil spring 80 is accommodated on the transmission tooth 92, and as shown in FIG. Figure 5.2As shown in FIG. 8 , a wound helical spring 86 can be accommodated on each of the drive teeth 92 , which is wound around the respective drive tooth 92 in the form of a ring and is produced as a single component.

[0050] The single wound helical spring 86 can be formed from a pin-shaped helical spring 80 (see Figure 3.4 ) is manufactured in a rectangular shape with a corresponding length and is simply placed from the top on the projection 84 or the transmission tooth 92 before the shaft-hub connection 76 is established. The wound helical spring 86 is placed in such a way that it is pressed into the corresponding longitudinal groove 94 in the root area of ​​the transmission tooth 92 and is permanently locked there due to the spring tension. This results in that there is a region of the wound helical spring 86 on each side of the transmission tooth 92.

[0051] Figure 6 The force relationship between the wound helical spring 86, which is received in the longitudinal grooves 94 on the two tooth flanks of the projection 84, is shown. The wound helical spring 86 is abutted against the longitudinal grooves 94 of the drive tooth 92 and is in accordance with Figure 6 The angles α and α / 2 and β extend in the plane of the drawing and on the other hand extend in the circumferential direction of the hub 74 on the contact surface 96 of the groove 82. By determining the angles α or α / 2 and β, the required support force requirements in both the radial direction and the tangential direction can be designed and determined according to the desired mechanical load. AN Indicates the driving force driving part, and F AEINB Indicates the installation force part. It is divided into radial part FR 1… and the tangential part FT F1… . As in Figure 6 In addition, according to Figure 6 As can be seen from the illustration of , the wound helical spring 86 is designed in the shape of a ring and engages without play on a contact surface 96 of a groove 82 extending in the circumferential direction on the hub 74 .

[0052] Figure 7 A perspective view of a journal constructed on the shaft 72 is shown. Figure 7 As can be seen from the figure, a plurality of drive teeth 92 are formed on the journal of the shaft 72, and the drive teeth are present here in 90° divisions. On each tooth surface 102 of the drive tooth 92, there is a longitudinal groove 94 extending in the axial direction. A clamping pin 88 is introduced into each of the longitudinal grooves 94, such as Figure 890 . The clamping pin 88 has a substantially pin-shaped appearance, wherein the circumference of the clamping pin is interrupted by a longitudinal slit 90. The clamping pin 88 is preferably made of a spring steel sheet 62, like the previously mentioned stamped spring ring 60. After stamping, the clamping pin 88 is bent so that its ends are opposite each other along the longitudinal slit 90 without contacting each other. As a result, the clamping pin 88 made of spring steel sheet 62 acquires elasticity. If now a spring is introduced on each side in each longitudinal groove 94 on the tooth flank 102 of the drive tooth 92 according to Figure 8 By removing the clamping pin 88 shown in the figure, the journal of the shaft 72 can engage with the hub 74.

[0053] from Fig. 9 In the top view shown in FIG. 1 , it can be seen that in the assembled state of the shaft-hub connection 76, the hub 74 is connected to the shaft 72 or to the hub 74 in the assembled state. Figure 7 . In this case, all the drive teeth 92 are inserted into corresponding grooves 82 extending in the circumferential direction of the hub 74. This causes the outer circumferential surfaces of the clamping pins 88 to respectively abut against abutment surfaces 96, which contact the grooves 82 extending in the circumferential direction in the hub 74. Since a clamping pin 88 is arranged in the longitudinal groove 94 on each of the tooth flanks 102 of each drive tooth 92, the shaft 72 or its journal is accommodated in the hub 74 without play and is centered relative to the hub due to the elasticity of the clamping pins 88. When the shaft 72 is rotated both in the first rotational direction 98 and in the second rotational direction 100 opposite thereto, it is ensured that the outer circumference of the clamping pin 88 comes into contact on one of the tooth flanks 102 with the corresponding abutment surface 96 of the groove 82 extending in the circumferential direction according to the rotational directions 98, 100. Fig. 9 The alternating operation of the toothless flank of the shaft-hub connection 76 shown in the top view in the first rotational direction 98 and in the second rotational direction 100 is ensured. Fig. 9 The illustration of shows that in the top view according to the figure, the clamping pin 88 which is accommodated in a longitudinal groove 94 extending in the plane of the drawing does not have a closed circumferential surface, but rather is formed on its circumference with longitudinal slits 90 which impart elasticity to the clamping pin 88 .

[0054] Depend on Fig. 9 It is known that in this embodiment variant of the shaft 72, four drive teeth 92 are constructed with a 90° division. On each of its tooth flanks 102 there is a longitudinal groove 94 extending in the plane of the drawing. Figure 8 Inserted into this longitudinal groove is a clamping pin 88 , which is shown in perspective in FIG. 8 , and which in this illustration can be rolled out of a spring steel sheet 62 and has a longitudinal slit 90 extending in the longitudinal direction.

[0055] Not only through Figure 4.3 The shaft connection portion 40 is also provided according to Figure 5-9The shaft-hub connection 76 of the present invention is a shaft connection 40, for example, a play-free and centered connection of two drive components of the first shaft 12 and the second shaft 22 is possible, and the shaft-hub connection 76 is a play-free and centered connection between the shaft 72 and the hub 74. In both variants, good centering and defined positioning and vibration damping can be achieved inside the shaft connection 40 and the shaft-hub connection 76. The solution proposed according to the invention in its two implementation variants results in significantly lower transmission power losses and outstanding damping characteristics. Unbalance and transmission shocks and the resulting noise reduction and running smoothness are other features of the shaft connection 40 proposed according to the invention. As a result, the inclined load-bearing diagram is eliminated again with respect to the first toothing 14 meshing with the second toothing 16 and with respect to the shaft connection 40, for example, which is constructed as a plug toothing. The service life of the play-free shaft connection 40 proposed according to the invention and the centered and play-free shaft-hub connection 76 can be estimated significantly higher due to the lower mechanical stress.

[0056] By selecting the appropriate spring steel sheet 62 and the high degree of variation in the design with regard to the wire diameter 54 and the spring diameter 56 , the spring elements 42 and 44 , whether produced as rolled spring rings 58 or stamped spring rings 60 , can be produced in almost any geometry and size.

[0057] The invention is not limited to the embodiments described here and the aspects emphasized therein. Instead, numerous modifications are possible within the scope of the claims which are within the purview of a person skilled in the art.

Claims

1. A shaft connection (40) between a first shaft (12) having a first toothing (14) and a second shaft (22) having a second toothing (16), characterized in that: At least one spring element (42, 44, 80, 86, 88) in the form of a ring or a pin is accommodated on the first shaft (12), the at least one spring element centers the first shaft (12) relative to the second shaft (22) or conversely centers the second shaft (22) relative to the first shaft (12), wherein a first spring element (42) is accommodated on the circumference of the first shaft (12) and a second spring element (44) is accommodated spaced apart from the first spring element (42), wherein the first spring element (42) and the second spring element (44) are dimensioned such that the outer circumference of the first spring element (42) and the second spring element (44) press against the tooth tip circle of a second toothing (16) on the second shaft (22).

2. The shaft connection portion (40) according to claim 1, characterized in that: The spring elements (42, 44) are designed as rolled-up spring rings (58), in which a spring ring start (48) and a spring ring end (50) are connected at a connection point (52).

3. The shaft connection portion (40) according to claim 1, characterized in that: The spring element (42, 44) is designed as a rolled spring ring (58) made of spring wire with a wire diameter (54) between 0.2 mm and 0.5 mm and made of spring steel wire, stainless steel spring wire or EN10270-3-14-310 with a spring diameter (56) between 1.2 mm and 5 mm.

4. The shaft connection portion (40) according to claim 1, characterized in that: The spring element (42, 44) is manufactured as a stamped spring ring (60) from spring steel sheet (62).

5. The shaft connection portion (40) according to claim 4, characterized in that: The spring elements (42, 44) of the stamped spring ring (60) have a first cross-section (66) and a second cross-section (68) in alternating order.

6. The shaft connection portion (40) according to claim 1, characterized in that: A spring element (42, 44) on the first shaft (12) or the second shaft (22) is received in a groove which extends in the circumferential direction on the shaft (12, 22).

7. A shaft-hub connection (76) between a shaft (72) having transmission teeth (84, 92) and a hub (74) having grooves (82) in the circumferential direction, characterized in that: The drive teeth (84, 92) are either wrapped around an annular spring element (42, 44, 86) or provided with a pin-shaped spring element (80, 88) which supports the drive teeth (84, 92) in a groove (82) of the hub (74) in the circumferential direction.

8. The shaft-hub connection (76) according to claim 7, characterized in that The spring elements (42, 44) are designed as rolled-up spring rings (58), in which a spring ring start (48) and a spring ring end (50) are connected at a connection point (52).

9. The shaft-hub connection (76) according to claim 7, characterized in that The spring element (42, 44) is designed as a rolled spring ring (58) made of spring wire with a wire diameter (54) between 0.2 mm and 0.5 mm and made of spring steel wire, stainless steel spring wire or EN10270-3-14-310 with a spring diameter (56) between 1.2 mm and 5 mm.

10. The shaft-hub connection (76) according to claim 7, characterized in that The spring element (42, 44) is manufactured as a stamped spring ring (60) from spring steel sheet (62).

11. The shaft-hub connection (76) according to claim 10, characterized in that The spring elements (42, 44) of the stamped spring ring (60) have a first cross-section (66) and a second cross-section (68) in alternating order.

12. The shaft-hub connection (76) according to claim 7, characterized in that The drive teeth (84, 92) have a longitudinal groove (94) in the root region for receiving a helical spring (80) or a clamping pin (88).

13. The shaft-hub connection (76) according to claim 12, characterized in that The clamping pin (88) has a longitudinal slit (90) on its circumference.

14. The shaft-hub connection (76) according to claim 12, characterized in that The longitudinal groove (94) is formed in the root region of the two tooth flanks (102) of the drive tooth (84, 92).

15. Use of a shaft connection (40) according to any one of claims 1 to 6 or a shaft-hub connection (76) according to any one of claims 7 to 14 for connecting two shafts (12, 22) in a transmission of an electrically driven vehicle.

16. Use of a shaft-hub connection (76) according to any one of claims 7 to 14 between a shaft (72) and a hub (74) in an E-axle module of an electrically driven vehicle.

17. Use of the shaft connection (40) according to any one of claims 1 to 6 or the shaft-hub connection (76) according to any one of claims 7 to 14 in a transmission mechanism of a vehicle driven by an internal combustion engine, a hybrid electric vehicle (HEV) or a plug-in hybrid electric vehicle (PHEV).

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