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A park brake systems and methods are disclosed. According to various embodiments, park brake systems comprising a tapered motor shaft having a first diameter and a second diameter, the second diameter being greater than the first diameter, a voice coil disposed at least partially around a circumfere

A park brake systems and methods are disclosed. According to various embodiments, park brake systems comprising a tapered motor shaft having a first diameter and a second diameter, the second diameter being greater than the first diameter, a voice coil disposed at least partially around a circumference of a bobbin, a first one-way clutch housed at least partially within the bobbin, the first one-way clutch disposed coaxial to the tapered motor shaft, and an annular magnet disposed coaxial to the tapered motor shaft and proximal to the first one-way clutch, wherein, in response to a first voltage applied to the voice coil, the first one-way clutch translates axially in a first direction with respect to the tapered motor shaft and engages with the second diameter are disclosed.

대표청구항 ▼

1. A park brake system comprising: a tapered motor shaft having a first diameter and a second diameter, the second diameter being greater than the first diameter;a spring disposed at least partially around a circumference of the tapered motor shaft;a voice coil disposed at least partially around a c

1. A park brake system comprising: a tapered motor shaft having a first diameter and a second diameter, the second diameter being greater than the first diameter;a spring disposed at least partially around a circumference of the tapered motor shaft;a voice coil disposed at least partially around a circumference of a bobbin comprising a ferromagnetic insert;a first one-way clutch housed at least partially within the bobbin, the first one-way clutch disposed coaxial to the tapered motor shaft; andan annular magnet disposed coaxial to the tapered motor shaft and proximal to the first one-way clutch;wherein, in response to a first voltage applied to the voice coil, the first one-way clutch translates axially in a first direction with respect to the tapered motor shaft and engages with the second diameter, andwherein, in response to a second voltage applied to the voice coil, the first one-way clutch translates axially in a second direction and is disposed about the first diameter. 2. The park brake system of claim 1, further comprising a second one-way clutch housed at least partially within the bobbin. 3. The park brake system of claim 2, wherein the first one-way clutch and the second one-way clutch are disposed to prevent rotation of the tapered motor shaft in response to engagement with the tapered motor shaft. 4. The park brake system of claim 1, further comprising an annular steel ring disposed coaxial to the tapered motor shaft and proximal to the annular magnet. 5. The park brake system of claim 1, wherein the second voltage is reversed relative to the first voltage. 6. The park brake system of claim 1, wherein the spring exerts a distal force on the bobbin. 7. The park brake system of claim 6, wherein, in response to the first voltage applied to the voice coil, the distal force acts in a direction opposite the first direction. 8. The park brake system of claim 1, wherein the first one-way clutch is at least one of an HF type one-way clutch, an HFL type one-way clutch, an NCM type one-way clutch, an NHF type one-way clutch, an NCU type one-way clutch, an NCZ type one-way clutch, an NCZC type one-way clutch, an NCZX type one-way clutch, and an NCUX type one-way clutch. 9. An electromechanical actuator (“EMA”), comprising the park brake system of claim 1. 10. A method comprising: applying a first voltage to a voice coil disposed at least partially around a circumference of a bobbin comprising a ferromagnetic insert, wherein a first one-way clutch is housed at least partially within the bobbin, the first one-way clutch disposed coaxial to a tapered motor shaft having a first diameter and a second diameter, the second diameter being greater than the first diameter;translating the first one-way clutch axially in a first direction with respect to the tapered motor shaft; andengaging the first one-way clutch to the second diameter, wherein rotation of the tapered motor shaft is prevented in a first rotational direction in response to engagement of the first one-way clutch with the tapered motor shaft. 11. The method of claim 10, further comprising: applying a second voltage to the voice coil;translating the first one-way clutch axially in a second direction; anddisposing the first one-way clutch about the first diameter. 12. The method of claim 10, further comprising a second one-way clutch housed at least partially within the bobbin. 13. The method of claim 12, wherein the first one-way clutch and the second one-way clutch are disposed to prevent rotation of the tapered motor shaft when in an engaged state. 14. The method of claim 10, wherein the first voltage is applied by an electromechanical actuator controller (“EMAC”).