CONE PULLEY ARRANGEMENT FOR A CONE PULLEY TRANSMISSION WITH NESTED COMPONENTS

Abstract

A cone pulley arrangement (1) for a cone pulley transmission, comprising: a shaft (2) which can be rotated about a rotational axis (3); at least one bearing (4, 5) by means of which the shaft (2) can be mounted; a first cone pulley (6), which is torsionally fixed and is fixedly connected to the shaft (2) in an axial direction (7); a second cone pulley (8) which is fixedly connected to the shaft (2) and is adjustable in the axial direction (7) relative to the shaft (2); a gearwheel (9) which is fixedly connected to the shaft (2); and an actuating member (10) for adjusting the second cone pulley (8), comprising a spring (11) and a piston (12), wherein the spring (11) and the piston (12) are at least partially nested with the gearwheel (9) or with the at least one bearing (4, 5) in the axial direction (7).

Claims

1. A cone pulley arrangement (1) for a cone pulley transmission, comprising: a shaft (2) which can be rotated about a rotational axis (3); at least one bearing (4, 5) by means of which the shaft (2) can be mounted; a first cone pulley (6), which is torsionally fixed and is fixedly connected to the shaft (2) in an axial direction (7); a second cone pulley (8) which is fixedly connected to the shaft (2) and is adjustable in the axial direction (7) relative to the shaft (2); a gearwheel (9) which is fixedly connected to the shaft (2); and an actuating member (10) for adjusting the second cone pulley (8), comprising a spring (11) and a piston (12), wherein the spring (11) and the piston (12) are at least partially nested with the gearwheel (9) or with the at least one bearing (4, 5) in the axial direction (7).

2. The cone pulley arrangement (1) according to claim 1, wherein the spring (11) and the piston (12) at least partially engage the gearwheel (9) or the at least one bearing (4, 5).

3. The cone pulley arrangement (1) according to one of the above claims, wherein the gearwheel (9) has an axial recess (13).

4. The cone pulley arrangement (1) according to one of the above claims, wherein the at least one bearing (4, 5) has an axial recess (13).

5. The cone pulley arrangement (1) according to claim 4, wherein the axial recess (13) is formed in a bearing internal ring (14) of the at least one bearing (4, 5).

6. The cone pulley arrangement (1) according to any one of claims 3 through 5, wherein the axial recess (13) is annular.

7. The cone pulley arrangement (1) according to one of claims 3 through 6, wherein the spring (11) engages with a first axial end (15) in the axial recess (13).

8. The cone pulley arrangement (1) according to one of claims 3 through 7, wherein the piston (12) engages with a second axial end (16) in the recess (13).

9. The cone pulley arrangement (1) according to any of the above claims, wherein the piston (12) is attached to the gearwheel (9) or to the at least one bearing (4, 5).

10. The cone pulley arrangement (1) according to one of the above claims, wherein the piston (12), the spring (11), the gearwheel (9) and the at least one bearing (4, 5) are arranged side by side on the shaft (2).

Description

[0028] Both the invention and the technical environment will be explained in more detail below using the figures. It should be noted that the figure shows a particularly preferred variant of the invention, but is not limited thereto. In an exemplary and schematic manner:

[0029] FIG. 1: shows a cone pulley arrangement in longitudinal section.

[0030] FIG. 1 shows a longitudinal section of a cone pulley arrangement 1. The cone pulley arrangement 1 has a shaft 2 which can be rotated about a rotational axis 3. The shaft 2 can be mounted with a first bearing 4 and a second bearing 5 on a housing of a cone pulley transmission, which is not shown here. The first bearing 4 and the second bearing 5 are designed like ball bearings. The first bearing 4 also has a bearing inner ring 14 and a bearing outer ring 18. A first cone pulley 6 is formed in one piece with shank 2. As a result, the first cone pulley 6 is torsionally fixed and is fixedly connected to the shaft 2 in the axial direction 7. The first cone pulley 6 can be rotated around the rotational axis 3 with the shaft 2. In addition, a second cone pulley 8 is fixedly connected to shaft 2 via a left-hand gearing 20. The second cone pulley 8 can thus be rotated with shaft 2 about the rotational axis 3. In addition, the second cone pulley 8 can be adjusted in the axial direction 7 relative to shaft 2. To adjust the second cone pulley 8, cone pulley assembly 1 has an actuating member 10 consisting of a spring 11 and a piston 12. The spring 11 is a helical spring with one longitudinal end supported by the second cone pulley 8 and an opposite longitudinal end supported by a gearwheel 9. The gearwheel 9 is torsionally fixed and is fixedly connected to shaft 2 in the axial direction 7. The spring 11 is pre-tensioned so that it presses the second cone pulley 8 against the first cone pulley 6 in the axial direction 7. This allows the second cone pulley 8 to be adjusted by spring 11 in the axial direction 7 in the direction of the first cone pulley 6. When the second cone pulley 8 is adjusted, a tubular section 19 of the second cone pulley 8 with an inner peripheral surface 21 slides along a radially outer peripheral surface 22 of the piston 12. On the outer peripheral surface 22, piston 12 has a circumferential groove 23 in which a seal 24 in the form of a sealing ring is arranged. The seal 24 seals a pressure chamber 17 for a pressure medium against an environment. The pressure medium allows the second cone pulley 8 to be moved away from the first cone pulley 6 in the radial direction 7 against the spring force of the spring 11, so that a distance between the first cone pulley 6 and the second cone pulley 8 increases. The gearwheel 9 has an annular recess 13 in which the spring 11 engages with the first axial end 15 thereof and the piston 12 with the second axial end 16 thereof, thus nesting with gearwheel 9. The piston 12 is also fixed with the second axial end 16 thereof to the recess 13 of gearwheel 9. In an alternative embodiment, the position of the gearwheel 9 and the first bearing 4 can be exchanged and the recess 13 can be formed in the bearing inner ring 14 of the first bearing 4.

[0031] The present invention makes a cone pulley arrangement for a cone pulley transmission particularly compact and easy to design.

LIST OF REFERENCE SYMBOLS

[0032] 1 Cone pulley arrangement [0033] 2 Shaft [0034] 3 Rotational axis [0035] 4 First bearing [0036] 5 Second bearing [0037] 6 First cone pulley [0038] 7 Axial direction [0039] 8 Second cone pulley [0040] 9 Gearwheel [0041] 10 Actuating member [0042] 11 Spring [0043] 12 Piston [0044] 13 Recess [0045] 14 Bearing inner ring [0046] 15 First axial end [0047] 16 Second axial end [0048] 17 Pressure chamber [0049] 18 Bearing outer ring [0050] 19 Tubular section [0051] 20 Longitudinal gearing [0052] 21 Internal periphery [0053] 22 External periphery [0054] 23 Groove [0055] 24 Seal