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US 2026/0257528 A1Published application
Locking device for chassis actuator
AssigneeSchaeffler Technologies AG & Co. KG
InventorsSicheng Song, Timothy Jacques
Life of this patent
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Abstract
A vehicle chassis actuator includes an electric motor, a housing, a geartrain disposed within the housing, and a double-wrap spring disposed within the geartrain. The double-wrap spring prevents back-driving of the geartrain via locking: i) of an outer coil array of the double-wrap spring against a housing, and ii) locking of an inner coil array of the double-wrap spring against a gearwheel of the geartrain.
Claims20
A vehicle chassis actuator, comprising:
- an electric motor;
- a geartrain drivably connected to the electric motor;
- and
- a spring disposed circumferentially around one gearwheel of the geartrain, the spring configured to prevent back-driving of the geartrain.
1 more element
A vehicle chassis actuator, comprising:
- a housing;
- an electric motor fixed to the housing;
- a transmission disposed within the housing and having at least one rotatable transmission wheel drivably connected to the electric motor;
- a wrap spring simultaneously locked to one of the at least one rotatable transmission wheel and the housing via an interference fit;
- and
- rotation of the one of the at least one rotatable transmission wheel in a first rotational direction causes:
- the wrap spring to lockably engage the housing;
- and
- the wrap spring to unlockably disengage from the one of the at least one rotatable transmission wheel;
- and
- rotation of the one of the at least one rotatable transmission wheel in a second rotational direction causes:
- the wrap spring to unlockably disengage from the housing;
- and
- the wrap spring to lockably engage the one of the at least one rotatable transmission wheel.
11 more elements
Dependencies are inferred from the claim text.