Crankcase mounts and reinforced rubber in mount on force vector

Patent metadata

Field	Value
Publication number	US-2019101093-A1
Application number	US-201715723884-A
Country	US
Kind code	A1
Filing date	Oct 3, 2017
Priority date	Oct 3, 2017
Publication date	Apr 4, 2019
Grant date	—

Abstract

An engine is disclosed having a starter clutch ring gear, and a crank case having an integral starter pinion accepting member defining a through bore, and a gear assembly having an exterior surface configured to engage a flywheel and an surface engaging the second of the shaft. A starter pinion shaft is disposed through the through bore. The integral starter pinion accepting member defines a surface coupled to an engine mount.

First claim

1 . An engine comprising:
a clutch ring gear; a crank case having an integral starter pinion accepting member defining a through bore, said through bore having a through bore interior surface; a gear assembly having an exterior surface configured to engage a ring gear and a surface configured to engage a linear drive; and a starter pinion shaft disposed through the through bore, the shaft having a first end projecting from a first side of the integral starter pinion accepting member and being configured to be coupled to a starter motor, the starter pinion shaft having a second end projecting from a second side of the integral starter pinion accepting member, the second end defining a linear drive surface supporting the gear assembly, the pinion shaft being supported by a bearing disposed between the starter pinion shaft and the through bore internal surface.

2 . The engine of claim 1 wherein the second end defines a worm gear configured to bias the gear assembly in a first direction when the shaft is rotated.

3 . The engine according to claim 2 wherein the gear assembly has a gear defining an internally threaded bore and an externally threaded surface, the internally threaded bore being configured to engage the worm gear defined on the starter pinion shaft.

4 . The engine accordingly to claim 1 wherein the gear assembly comprises a return spring configured to bias the gear assembly exterior surface away from the ring gear when the shaft is not rotating.

5 . The engine according to claim 1 further comprising a locking member annularly disposed about the shaft configured to fixably couple the shaft to starter pinion accepting member.

6 . The engine according to claim 1 wherein the first end defines a flat configured to engage a flexible drive member.

7 . The engaging according to claim 1 wherein the gear assembly has a dust cover disposed over a return spring.

8 . The engaging according to claim 1 wherein the gear assembly has a bearing configured to support the gear assembly on the starter pinion shaft.

9 . An engine crankcase comprising:
an integral starter pinion accepting member defining a through bore and an external bearing surface the pinion having a linear drive; a gear assembly having an clutch ring gear engaging surface and an interior surface configured to couple to the linear drive; an engine mount coupled to the external bearing surface.

10 . The engine according to claim 9 wherein the gear assembly defines an internally threaded bore and an externally threaded surface, the internally threaded bore being configured to engage the linear drive, said linear drive being configured to bias the gear assembly exterior surface toward the ring gear when the shaft is rotated.

11 . The engine accordingly to claim 9 wherein the gear assembly comprises a return spring configured to bias the gear assembly exterior surface away from the ring gear when the shaft is not rotating.

12 . The engine according to claim 9 further comprising a locking flange annularly disposed about the shaft configured to fixably couple the shaft to starter pinion accepting member.

13 . The engine according to claim 9 wherein the first end defines a flat configured to engage a flexible drive member.

14 . The engine according to claim 9 wherein the gear assembly has a dust cover disposed over a return spring.

15 . An engine mount comprising:
a cylindrical bushing member having a first pair of projecting flanges coupled to an exterior bearing surface; an integrated plate member having a second pair of projecting flanges, the integrated plate member being at least partially disposed within the cylindrical bushing member; and a support bracket having a raised lip annularly surrounding the cylindrical bushing member.

16 . The engine mount according to claim 15 wherein the support bracket has a threaded pin disposed through the cylindrical bushing member which is used to couple the engine mount to a vehicle frame engaging member.

17 . The engine mount according to claim 15 wherein the second pair of projecting flanges are at least partially disposed within the first pair of projecting flanges, and wherein at least one of the first or second projecting flanges are aligned with a pair of flange accepting apertures defined in a vehicle frame.

18 . The engine mount according to claim 15 wherein the first pair of projecting flanges are positioned on a first surface of the cylindrical bushing member and are radially displaced between 10 and 180 degrees about a cylindrical bushing member periphery.

19 . The engine mount according to claim 15 wherein the support bracket has an interface surface configured to be directly mounted to a crankcase.

20 . The engine mount according to claim 15 wherein the cylindrical bushing member extends from a top surface to a bottom surface;
wherein the first pair of projecting flanges coupled to the exterior bearing surface extend off of the top surface.

21 . The engine mount according to claim 20 wherein the cylindrical bushing member is formed of rubber.

Assignees

• Polaris Inc

Inventors

• Dale Chad A
• Hosaluk Lawrence J

Classifications

• B62M2027/023

  Snow mobiles characterised by engine mounting arrangements · CPC title

• F02N15/06 Primary

  the toothed gears being moved by axial displacement · CPC title

• B60K5/12

  Arrangement of engine supports · CPC title

• B60K5/1208

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title

• B62D21/11

  with resilient means for suspension {, e.g. of wheels or engine; sub-frames for mounting engine or suspensions} · CPC title