Starter and mower using the starter

• US 9,797,360 B2
• Filed: 12/14/2012
• Issued: 10/24/2017
• Est. Priority Date: 12/15/2011
• Status: Expired due to Fees

• Current Assignee: Johnson Electric International AG (Johnson Electric Holdings Limited)
• Original Assignee: Johnson Electric SA 125 Rue de Progres La Chaux de Fonds Switzerland (Johnson Electric Holdings Limited)
• Inventors: Ke, Jun, Chan, Po Wah, Chu, Jun Jie
• Primary Examiner(s): FENSTERMACHER, DAVID MORGAN
• Application Number:
  US13/714,958
• Publication Number:
  US 20130152733A1
• Time in Patent Office: 1,775 Days
• CPC Class Codes: F02N 11/00 Starting of engines by means of electric motors
• CPC Class Codes: F02N 11/14 Starting of engines by means of electric starters with external current supply F02N11/12 takes precedence
• CPC Class Codes: F02N 15/006 Assembling or mounting of starting devices
• CPC Class Codes: F02N 15/025 of the friction type
• CPC Class Codes: F02N 15/043 the gearing including a speed reducer
• CPC Class Codes: Y10T 74/134 Clutch connection

Abstract

A starter has a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear and a switch box configured to turn on the electric motor. The output gear is driven by the electric motor via the speed reduction device and the clutch. The starter also has a stationary axle on which the output gear is installed. The electric motor has an output shaft. The speed reduction device has a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear being rotatably mounted to the axle via a bushing.

Claims

1. A starter for an internal combustion engine, comprising:

a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear, a switch box configured to turn on or off the electric motor and a stationary axle on which the output gear is installed, the stationary axle being stationary in a rotational sense, the output gear being driven by the electric motor via the speed reduction device and clutch to directly drive a flywheel of the internal combustion engine;

the high voltage direct current electric motor selectively receiving a high voltage direct current output from the switch box which is electrically connected to a high voltage power source having a voltage in the range of 100-500 volts.

2. The starter of claim 1, wherein the switch box comprises a connector configured to electrically connect to an alternating current high voltage power source, a rectifier converting alternating current to direct current, and a cable connecting the switch box to the motor.

3. The starter of claim 1, wherein the electric motor comprises an output shaft, the speed reduction device comprises a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear being rotatably mounted to the stationary axle via a bushing.

4. The starter of claim 3, wherein the clutch comprises the driven gear, a drive part, a friction part, a wave-shaped elastic part and a cover, and wherein the drive part, the friction part, and the wave-shaped elastic part are sandwiched between the driven gear and the cover, the wave-shaped elastic part being compressed between the cover and the friction part.

5. The starter of claim 4, wherein a spline is rotatably mounted on the stationary axle and the output gear is moveably mounted on the spline, one axial end of the spline extending into the cover of the clutch to engage with the drive part of the clutch.

6. The starter of claim 1, further comprising a metal mounting plate disposed between the motor and the speed reduction device, one end of the stationary axle being fixed to the mounting plate, wherein the mounting plate defines a plurality of mounting holes for fasteners to fix the starter to the engine.

7. The starter of claim 6, wherein each of the mounting holes defines an axis which is one of parallel and perpendicular to an axis of the electric motor.

8. The starter of claim 6, further comprising a protective cap configured for partly covering the output gear, wherein the cap defines an opening at one side thereof for providing access for the output gear to engage with a flywheel of the engine.

9. The starter of claim 6, further comprising a mounting bracket which comprises a tube-shaped casing in which the electric motor is located, and a supporting flange radially extending outwardly from the casing, wherein the metal mounting plate is fixed to the supporting flange by fasteners.

10. The starter of claim 9, wherein the starter further comprises a lid which cooperates with the mounting plate to form an enclosed space, the speed reduction device and clutch being received in the space.

11. The starter of claim 10, wherein a protective cap comprises a radially extended mounting flange which defines elongated slots, fasteners respectively extending through the elongated slots, the lid, the mounting plate and the supporting flange of the mounting bracket to engage with nuts to thereby fix the protective cap, the lid, the mounting plate and the mounting bracket together.

12. The starter of claim 10, wherein the mounting plate is sandwiched between the lid and the supporting flange, and a pair of seals is respectively disposed between opposite sides of the mounting plate and the lid and the supporting flange.

13. A mower comprising a body, a handle extending from the body, a plurality of wheels installed at the bottom of the body, an internal combustion engine installed at the top of the body, and a starter installed on one side of the engine and arranged to selectively engage and rotate a flywheel of the engine to start the engine,

wherein the starter comprises a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear, a switch box configured to turn on or off the electric motor, and a stationary axle on which the output gear is installed, the stationary axle being stationary in a rotational sense, the output gear being driven by the electric motor via the speed reduction device and clutch to directly drive the flywheel, the switch box being installed on the handle.

14. The mower of claim 13, wherein a spline is rotatably mounted on a stationary axle and the output gear is moveably mounted on the spline, one axial end of the spline extending into the cover of the clutch to engage with the drive part of the clutch.

15. The mower of claim 13, wherein the electric motor comprises an output shaft, the speed reduction device comprises a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear is rotatably mounted to the stationary axle via a bushing.

16. The mower of claim 15, further comprising a metal mounting plate disposed between the motor and the speed reduction device, one end of a stationary axle being fixed to the mounting plate, wherein the mounting plate defines a plurality of mounting holes for fixing the starter to the engine.

17. The mower of claim 16, further comprising a mounting bracket which comprises a tube-shaped casing in which the electric motor is located, and a supporting flange radially extending outwardly from the casing, wherein the metal mounting plate is fixed to the supporting flange by fasteners.

18. The mower of claim 17, wherein the starter further comprises a lid which cooperates with the mounting plate to form an enclosed space, the speed reduction device and clutch being received in the space.

19. The mower of claim 15, wherein the clutch comprises the driven gear, a drive part, a friction part, a wave-shaped elastic part and a cover, and wherein the drive part, the friction part, and the wave-shaped elastic part are sandwiched between the driven gear and the cover, the wave-shaped elastic part being compressed between the cover and the friction part.

20. A starter for an internal combustion engine, comprising:

a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear, a switch box configured to turn on or off the electric motor, and a stationary axle independent of an output shaft of the motor, the output gear being driven by the electric motor via the speed reduction device and clutch, the high voltage direct current electric motor selectively receiving a high voltage direct current output from the switch box which is electrically connected to a high voltage power source having a voltage in the range of 100-500 volts.