PARKING LOCK SYSTEM

• US 20170138474A1
• Filed: 11/14/2016
• Published: 05/18/2017
• Est. Priority Date: 11/17/2015
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Nomura, Takuya, Ueno, Takao, Kamo, Shunji
• Granted Patent: US 10,415,702 B2
• Time in Patent Office: Days
• CPC Class Codes: F16H 63/3425 characterised by pawls or wheels

Abstract

In a parking lock system, a link member that swings due to sliding of an operating shaft so as to make a perking lock operate and release the operation includes a counterweight for canceling out axial inertial force of the operating shaft. Therefore, even if the operating shaft attempts to slide in an axial direction with respect to a transmission case due to inertial force when a vehicle experiences sudden deceleration due to a frontal collision or sudden braking, mass of the counterweight resists the inertial force to thus prevent the link member from swinging, thereby making it possible to avoid a situation in which the parking lock is operated unintentionally.

Claims

1. A parking lock system comprising

a rotating shaft that is rotatably supported on a transmission case and transmits driving force from a drive source to a driven wheel,

a parking gear that is provided on the rotating shaft,

an operating shaft that is axially slidably supported on the transmission case and has opposite end parts disposed at positions displaced in a fore-and-aft direction of a vehicle body,

a link member that swings due to sliding of the operating shaft, and

a parking pawl that engages with the parking gear by swinging of the link member and non-rotatably restrains the rotating shaft,

wherein the link member comprises a counterweight for canceling out axial inertial force of the operating shaft.

2. The parking lock system according to claim 1, wherein the counterweight is formed from a vibration-absorbing rubber.