Seal structures
Disclosed herein is a threaded bottom bracket comprising: an internal sleeve, a ball bearing, wherein an inner race of the ball bearing is an extended inner race, a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve, a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path, and a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race.
1. A threaded bottom bracket comprising:
an internal sleeve;
a ball bearing, wherein an inner race of the ball bearing is an extended inner race;
a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve;
a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path;
a plurality of debris channels disposed within said path; and
a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race, wherein, as said labyrinth rotates, water and debris in said path are forced towards said cup and pushed out of said path due to a slope of a chamfer proximate an opening of said cup.
2. The threaded bottom bracket of claim 1 wherein, a connection between the internal sleeve and the cup is a press fit connection.
3. The threaded bottom bracket of claim 1 wherein, the internal sleeve has a grease channel at the connection between the internal sleeve and the cup.
4. The threaded bottom bracket of claim 1 wherein, the cup has threads on an external surface.
5. The threaded bottom bracket of claim 1 wherein, the labyrinth couples to the ball bearing via a snap fit connection.
6. A bottom bracket comprising:
a sleeve;
an external sleeve telescopically coupled to the sleeve;
a ball bearing comprising an inner race and an outer race;
a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, said labyrinth comprising a portion of a path;
a plurality of debris channels disposed within said path; and
a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the inner race, wherein, as said labyrinth rotates, water and debris in said path are forced away from said ball bearing and out of said path due to a slope of a chamfer in said outer race.
7. The bottom bracket of claim 6 wherein, the external sleeve and the sleeve are coupled with a press fit.
8. The bottom bracket of claim 6 wherein, the outer race is coupled to the external sleeve with a press fit.
9. The bottom bracket of claim 6 wherein, the outer race is connected to the sleeve with a press fit.
10. The bottom bracket of claim 6 wherein, the sleeve has a grease channel at the connection between the sleeve and the external sleeve.
11. The bottom bracket of claim 6 wherein, the labyrinth couples to the ball bearing via a snap fit connection.
12. A bicycle comprising:
a bike frame; and
a drive train, wherein the drive train is coupled to a threaded bottom bracket, wherein the threaded bottom bracket comprises:
an internal sleeve;
a ball bearing, wherein an inner race of the ball bearing is an extended inner race;
a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve;
a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path;
a plurality of debris channels disposed within said path; and
a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race, wherein, as said labyrinth rotates, water and debris in said path are forced towards said cup and pushed out of said path due to a slope of a chamfer proximate an opening of said cup.
13. A bicycle comprising:
a bike frame; and
a drive train, wherein the drive train is coupled to a bottom bracket, wherein the bottom bracket comprises:
a sleeve;
an external sleeve telescopically coupled to the sleeve;
a ball bearing comprising an inner race and an outer race;
a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the outer race form a path;
a plurality of debris channels disposed within said path; and
a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the inner race, wherein, as said labyrinth rotates, water and debris in said path are forced away from said ball bearing and out of said path due to a slope of a chamfer in said outer race.