CN-121993510-A - One-way clutch for a drive train of a vehicle and drive train for a vehicle

Abstract

The invention relates to a one-way clutch (1) for a drive train of a vehicle, comprising a clamping device (2), the clamping device (2) being provided with a coupling sleeve (3) for transmitting torque between a drive shaft (4) and a driven shaft (5), a coupling spring (6) for transporting the coupling sleeve (3) to a first switching position for transmitting torque between the drive shaft (4) and the driven shaft (5), and a switching device (7) arranged for switching the clamping device (2) from the first switching position to a second switching position for separating the drive shaft (4) from the driven shaft (5), characterized in that the one-way clutch further comprises an overload protection device (8), the overload protection device (8) being arranged for limiting the separating force separating the drive shaft (4) from the driven shaft (5) to a maximum value. The invention also relates to a drive train of a vehicle.

Inventors

• MATTHIAS FEUERBACH
• Martin Dressel
• Tobias Human
• ANDREAS STRAUSS

Assignees

• 舍弗勒技术股份两合公司

Dates

Publication Date

20260508

Application Date

20251013

Priority Date

20241108

Claims (10)

1. 1. A one-way clutch (1) for a drive train of a vehicle, comprising: a clamping device (2), the clamping device (2) being provided with a coupling sleeve (3), the coupling sleeve (3) being used for transmitting torque between a driving shaft (4) and a driven shaft (5), A coupling spring (6), which coupling spring (6) is used for conveying the coupling sleeve (3) to a first switching position of the transmission torque between the driving shaft (4) and the driven shaft (5), A switching device (7), the switching device (7) being provided for switching the clamping device (2) from the first switching position to a second switching position in order to effect a separation of the drive shaft (4) from the driven shaft (5), It is characterized in that the method comprises the steps of, The one-way clutch (1) further comprises an overload protection device (8), the overload protection device (8) being arranged to limit the separating force separating the driving shaft (4) from the driven shaft (5) to a maximum value.
2. 2. A one-way clutch according to claim 1, wherein, The overload protection device (8) comprises a housing (9) and a separating spring (10), Wherein the separating spring (10) is operatively connected to the coupling sleeve (3), Wherein the overload protection device (8) is provided for pretensioning the housing (9) against the release spring (10) when switching from the first switching position to the second switching position, so that the release force acts on the coupling sleeve (3) of the clamping device (2) for switching from the first switching position to the second switching position.
3. 3. A one-way clutch according to claim 2, wherein, The maximum value of the separating force of the separating spring (10) is greater than the maximum value of the binding force of the binding spring (6) of the switching device (7), wherein the spring rate of the separating spring is greater than the spring rate of the binding spring.
4. 4. A one-way clutch according to claim 2, wherein, The housing (9) has a ramp contour (11) for pretensioning the separating spring (10).
5. 5. A one-way clutch according to any one of claim 2 to 4, wherein, The coupling sleeve (3) has a stop (12) for supporting the separating spring (10).
6. 6. A one-way clutch according to any one of claim 2 to 5, wherein, The switching device (7) comprises a lifting magnet (13) with a switching element (14) for switching the clamping device (2), wherein the switching element (14) is provided for pretensioning the housing (9) against the separating spring (10) when switching from the first switching position to the second switching position.
7. 7. The one-way clutch according to claim 6, wherein, The switching element (14) comprises a rolling bearing (15), the rolling bearing (15) being provided for pretensioning the housing (9) against the separating spring (10) when switching from the first switching position to the second switching position.
8. 8. A one-way clutch according to any one of the preceding claims, characterized in that, The clamping device (2) comprises at least one clamping element (16), the clamping element (16) being used for connecting the driving shaft (4) and the driven shaft (5), wherein in the first switching position, the coupling sleeve (3) clamps the at least one clamping element (16) so that torque can be transmitted.
9. 9. A drive train for a vehicle comprising a one-way clutch (1) according to any one of claims 1 to 8.
10. 10. The drive train according to claim 9, wherein the vehicle is a pure electric vehicle or a hybrid vehicle.

Description

One-way clutch for a drive train of a vehicle and drive train for a vehicle Technical Field The invention relates to a one-way clutch for a drive train of a vehicle, comprising a clamping device with a coupling sleeve for transmitting torque between a driving shaft and a driven shaft, a coupling spring for carrying the coupling sleeve to a first switching position for transmitting torque between the driving shaft and the driven shaft, and a switching device for switching the clamping device from the first switching position to a second switching position for separating the driving shaft from the driven shaft, and to a drive train of a vehicle. Background One-way clutches are used in vehicles for separating a drive device, in particular an electric motor, from the wheels of the vehicle. In this way, it is not necessary to drag the drive device for operation, for example, when it is not necessary at all. This has a positive effect on improving energy efficiency. The one-way clutch has a mechanism for disengagement that enables a disengagement function within the respective drive train. In this process, the one-way clutch may be damaged due to external factors such as unevenness of road surface. In this situation, it is necessary to provide a one-way clutch for a drive train of a vehicle, and in particular to provide an improved one-way clutch for a drive train of a vehicle. Disclosure of Invention The technical problem underlying the present invention is therefore to eliminate or at least partially eliminate the drawbacks of the one-way clutch described above for a drive train of a vehicle. The object of the present invention is in particular to provide an improved one-way clutch for a drive train of a vehicle. The present invention solves the above-mentioned technical problem with a one-way clutch of the type mentioned above by providing overload protection means which are arranged to limit the separating force separating the driving shaft from the driven shaft to a maximum value. In particular, the above-mentioned technical problem is solved by a one-way clutch having the technical features of independent claim 1. The above-mentioned object is also achieved by a drive train of a vehicle having the features of independent claim 9. The technical features relating to the one-way clutch according to the invention are naturally also applicable here to the drive train according to the invention and vice versa, so that reference is always made to each other in the disclosure of the individual inventive aspects. According to a first aspect of the present invention there is provided a one-way clutch for a drive train of a vehicle, comprising a clamping device provided with a coupling sleeve for transmitting torque between a driving shaft and a driven shaft, a coupling spring coupled to the spring for carrying the coupling sleeve to a first switching position of the transmission torque between the driving shaft and the driven shaft, and a switching device arranged to switch the clamping device from the first switching position to a second switching position for disengaging the driving shaft from the driven shaft, characterized in that the one-way clutch further comprises overload protection means arranged to limit the disengagement force to a maximum value, the disengagement force being for disengaging the driving shaft from the driven shaft. The term "one-way clutch" here particularly refers to a structural device which is provided for establishing and re-releasing a connection for torque transmission between the first shaft and the second shaft. Wherein the first shaft may preferably be a drive shaft. Wherein the second shaft may preferably be a driven shaft. Herein, the term "drive train" refers to an assembly arranged to transmit power of an engine to wheels. The transmission system further comprises a drive shaft and a driven shaft. Here, the engine may preferably be an electric motor. A differential may preferably be arranged between the engine and the drive shaft. The driven shaft is preferably connected to a wheel of the vehicle. Herein, the term "vehicle" particularly refers to a vehicle having an electric drive train. The vehicle may be a pure electric vehicle (i.e., BEV). The vehicle may also be a hybrid electric vehicle (i.e., HEV). The term "clamping device" here refers in particular to a structural device which is provided for connecting a drive shaft with a driven shaft for transmitting torque. The term "coupling sleeve" here refers in particular to a structural element which is provided for the purpose of achieving a mechanical connection for torque transmission between a drive shaft and a driven shaft. For this purpose, the coupling sleeve can have structural elements, such as pins, which can be connected in a form-fitting and/or force-fitting manner between the drive shaft and the driven shaft. The coupling sleeve may be one-piece or multi-piece. The term "coupling spring" herein refers to a spring