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US 2021/0403126 A1Published application
Front derailleur and chain guide of bicycle derailleur
AssigneeShimano Inc.
InventorNaoki FUJIMOTO
Life of this patent
Estimating the term…
Abstract
A front derailleur comprises a base member, a chain guide, and a linkage structure. The base member includes a mounting hole. The mounting hole has a center axis. The linkage structure comprises a first link member and a second link member. The first link member is pivotally coupled to the base member about a first pivot axis. The second link member is pivotally coupled to the base member about a second pivot axis. The first link member is pivotally coupled to the chain guide about a third pivot axis. The second link member is pivotally coupled to the chain guide about a fourth pivot axis. At least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis are non-parallel to and non-perpendicular to the center axis of the mounting hole.
Claims36
A front derailleur comprising:
- a base member including a mounting hole through which a mounting fastener is to extend in a mounting state where the base member is mounted to a bicycle frame with the mounting fastener, the mounting hole having a center axis;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis being non-parallel to and non-perpendicular to the center axis of the mounting hole.
5 more elements
A front derailleur comprising:
- a base member including a mounting hole through which a mounting fastener is to extend in a mounting state where the base member is mounted to a bicycle frame with the mounting fastener, the mounting hole having a center axis;
- and
- a linkage structure pivotally coupled to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis,
- at least one of the first pivot axis and the second pivot axis being non-parallel to and non-perpendicular to the center axis of the mounting hole.
4 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with one of a bicycle frame and a clamp configured to couple the base member to the bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis being non-parallel to and non-perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with one of a bicycle frame and a clamp configured to couple the base member to the bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis,
- at least one of the first pivot axis and the second pivot axis being non-parallel to and non-perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member including a mounting hole through which a mounting fastener is to extend in a mounting state where the base member is mounted to a bicycle frame with the mounting fastener, the mounting hole having a center axis;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- the second pivot axis and the fourth pivot axis being non-parallel to and non-perpendicular to the center axis of the mounting hole.
5 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with one of a bicycle frame and a clamp configured to couple the base member to the bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- the second pivot axis and the fourth pivot axis being non-parallel to and non-perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with a clamp configured to couple the base member to a bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis being non-parallel to and non-perpendicular to a reference direction perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with a clamp configured to couple the base member to a bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis,
- at least one of the first pivot axis and the second pivot axis being non-parallel to and non-perpendicular to a reference direction perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member including a mounting surface configured to be contactable with a clamp configured to couple the base member to a bicycle frame in a mounting state where the base member is mounted to the bicycle frame;
- a chain guide movable relative to the base member;
- and
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- a first link member pivotally coupled to the base member about a first pivot axis;
- and
- a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
- the second pivot axis and the fourth pivot axis being non-parallel to and non-perpendicular to a reference direction perpendicular to a reference plane defined on the mounting surface.
5 more elements
A front derailleur comprising:
- a base member;
- a chain guide movable relative to the base member from a lower-gear position to a higher-gear position to move a chain in an outward-shifting direction, the chain guide being movable relative to the base member from the higher-gear position to the lower-gear position to move the chain in an inward-shifting direction which is an opposite direction of the outward-shifting direction;
- a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
- an inner link member pivotally coupled to the base member about a first pivot axis;
- and
- an outer link member pivotally coupled to the base member about a second pivot axis, the outer link member being spaced apart from the inner link member in the outward-shifting direction;
- and
- a motor unit configured to move the chain guide relative to the base member, the motor unit including a housing,
- at least one of the inner link member and the outer link member being contactable with one of the base member and an outer surface of the housing to define at least one of the lower-gear position and the higher-gear position.
6 more elements
A front derailleur comprising:
- a base member;
- a chain guide movable relative to the base member from a lower-gear position to a higher-gear position to move a chain in an outward-shifting direction, the chain guide being movable relative to the base member from the higher-gear position to the lower-gear position to move the chain in an inward-shifting direction which is an opposite direction of the outward-shifting direction, the chain guide comprising:
- an inner guide member configured to guide the chain in the outward-shifting direction;
- and
- an outer guide member configured to guide the chain in the inward-shifting direction, the outer guide member being spaced apart from the inner guide member in the outward-shifting direction;
- and
- a linkage structure configured to movably couple the chain guide to the base member,
- the inner guide member including:
- an inner guide plate including an opening having an inner periphery;
- and
- a surrounding wall extending from the inner periphery of the opening in one of the outward-shifting direction and the inward-shifting direction, the surrounding wall being provided to at least partly surround the opening.
8 more elements
A chain guide of a bicycle derailleur, comprising:
- a first guide member including:
- a first guide plate configured to be contactable with a chain;
- and
- a second guide member including:
- a second guide plate configured to be contactable with a chain and spaced apart from the first guide member;
- an extending part extending from the second guide plate toward the first guide plate, the extending part including:
- a first extending part having a first end portion, a second end portion, and a first intermediate portion positioned between the first end portion and the second end portion;
- and
- a second extending part having a third end portion, a fourth end portion, and a second intermediate portion positioned between the third end portion and the fourth end portion;
- the first intermediate portion of the first extending part being spaced apart from the second intermediate portion of the second extending part;
- the first end portion of the first extending part being coupled to the second guide plate;
- the third end portion of the second extending part being coupled to the second guide plate;
- and
- the second end portion of the first extending part being coupled to the fourth end portion of the second extending part.
11 more elements
A chain guide of a bicycle derailleur, comprising:
- a first guide member including:
- a first guide plate configured to be contactable with a chain;
- and
- a second guide member including:
- a second guide plate configured to be contactable with a chain and spaced apart from the first guide member;
- and
- an extending part extending from the second guide plate toward the first guide plate,
- the extending part including a first extending part extending in a first extending direction and a second extending part extending in a second extending direction, the first extending direction being non-parallel to the second extending direction, the first extending part being at least partly spaced apart from the second extending part.
5 more elements
Dependencies are inferred from the claim text.