Magnetic gear mechanism and winch apparatus

Abstract

This disclosure provides a magnetic gear mechanism comprising a drive shaft unit, a driven shaft unit, and an output shaft unit. The drive shaft unit includes a drive shaft body, a first drive gear, a second drive gear, and a third drive gear. The driven shaft unit includes a driven shaft body, a first driven gear, a second driven gear, a third driven gear, a fourth driven gear, a fifth driven gear, and a shifting component. The output shaft unit includes an output shaft body and an output gear. The output gear is mounted on the output shaft body and is selectively aligned with one of the third, fourth, or fifth driven gears. This allows for adjustment of the output torque and improves ease of use.

Claims

1. A magnetic gear mechanism, comprising: a drive shaft unit for receiving a driving force and including a drive shaft body, a first drive gear, a second drive gear, and a third drive gear, the first drive gear, the second drive gear, and the third drive gear being sequentially spaced and sleeved on the drive shaft body; a driven shaft unit including a driven shaft body, a first driven gear, a second driven gear, a third driven gear, a fourth driven gear, a fifth driven gear, and a shifting member, the driven shaft body being arranged parallel to the drive shaft body, the first driven gear, the second driven gear, the third driven gear, the fourth driven gear, and the fifth driven gear being sequentially spaced and sleeved on the driven shaft body, the shifting member being connected to the driven shaft body to drive the driven shaft body to switch the driven shaft unit between a first gear position, a second gear position, and a third gear position; and an output shaft unit, comprising: An output shaft body, rotated in conjunction with the driven shaft unit; and an output gear component, fitted onto the output shaft body and selectively aligned with one of the third, fourth, and fifth driven gear components; wherein... When the shifting member drives the driven shaft unit to the first gear position, the first driven gear is magnetically aligned with the first driving gear and the fourth driven gear is magnetically aligned with the output gear, and the output shaft unit provides a first gear mode output. When the shifting member drives the driven shaft unit to the second gear position, the second driven gear is magnetically aligned with the second driving gear and the third driven gear is magnetically aligned with the output gear, and the output shaft unit provides a second gear mode output. When the shifting member drives the driven shaft unit to the third gear position, the third driven gear is magnetically aligned with the third driving gear and the fifth driven gear is magnetically aligned with the output gear, and the output shaft unit provides a third gear mode output.

2. The magnetic gear mechanism as claimed in claim 1, wherein a diameter of the first driven gear is greater than a diameter of the second driven gear and a diameter of the third driven gear, and the diameter of the second driven gear is greater than the diameter of the third driven gear.

3. The magnetic gear mechanism as claimed in claim 1, wherein the third driven gear, the fourth driven gear, and the fifth driven gear have an equal diameter.

4. The magnetic gear mechanism as described in claim 1, further comprising: a housing for accommodating the drive shaft unit, the driven shaft unit, and the output shaft unit. The housing includes an upper wall, a moving track, a first gear slot, a second gear slot, and a third gear slot. The moving track is formed on the upper wall, and the shifting member is guided by the moving track. The first gear slot, the second gear slot, and the third gear slot are formed on the upper wall, orthogonal to the moving track, and connected to the moving track. The shifting member moves along the moving track and selectively engages with the first gear slot, the second gear slot, or the third gear slot. When the shifting member is in the first gear slot, the driven shaft unit is in the first gear position. When the shifting member is in the second gear slot, the driven shaft unit is in the second gear position. When the shifting member is in the third gear slot, the driven shaft unit is in the third gear position.

5. The magnetic gear mechanism as claimed in claim 1 further comprises: a ratchet connected to an output end of the output shaft, the ratchet including a plurality of ratchet teeth; and a pawl for selectively engaging with one of the ratchet teeth to prevent the ratchet from rotating in the opposite direction.

6. A rope winding device comprising: a magnetic gear mechanism as claimed in claim 1; a hand-operated rocker arm connected to the drive shaft, the hand-operated rocker arm being operated by a user to rotate to generate the driving force; and a rope winding reel connected to the output shaft and driven to rotate by the output shaft.

7. The rope winding device as claimed in claim 6, wherein a diameter of the first driven gear is greater than a diameter of the second driven gear and a diameter of the third driven gear, and the diameter of the second driven gear is greater than the diameter of the third driven gear.

8. The rope winding device as claimed in claim 6, wherein the third driven gear, the fourth driven gear, and the fifth driven gear have an equal diameter.

9. The rope winding device as claimed in claim 6, wherein the magnetic gear mechanism further comprises: a housing for accommodating the drive shaft unit, the driven shaft unit, and the output shaft unit. The housing includes an upper wall, a moving track, a first gear slot, a second gear slot, and a third gear slot. The moving track is formed on the upper wall, and the shifting member is guided by the moving track. The first gear slot, the second gear slot, and the third gear slot are formed on the upper wall, orthogonal to the moving track, and connected to the moving track. The shifting member moves along the moving track and selectively engages with the first gear slot, the second gear slot, or the third gear slot. When the shifting member is in the first gear slot, the driven shaft unit is in the first gear position. When the shifting member is in the second gear slot, the driven shaft unit is in the second gear position. When the shifting member is in the third gear slot, the driven shaft unit is in the third gear position.

10. The rope winding device as claimed in claim 6, wherein the magnetic gear mechanism further comprises: a ratchet connected to an output end of the output shaft, and the ratchet including a plurality of ratchet teeth; and a pawl for selectively engaging with one of the ratchet teeth to prevent the ratchet from rotating in a reverse direction.

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