Product Code:SAE J2249
Title:Wheelchair Tiedown and Occupant Restraint Systems for Use in Motor Vehicles
Issuing Committee:Adaptive Devices Standards Committee
Scope:This SAE Recommended Practice applies to WTORS comprised of a system or device for wheelchair tiedown and a system or device for restraining the wheelchair-seated occupant. It specifies design requirements, test methods, and performance requirements for WTORS, requirements for manufacturer's instructions to installers and users, and requirements for product marking and labeling. This document places particular emphasis on design requirements, test procedures, and performance requirements for the dynamic performance of WTORS in a 48-km/h, 20-g frontal impact. It also specifies test procedures and performance requirements for webbing slippage at adjustment devices of strap-type wheelchair tiedowns, and for partial but ineffective engagement of wheelchair tiedowns, and tiedown components that could be perceived to be effectively engaged. Appendix F includes additional recommendations for WTORS that will enhance the design, performance, installation, and use of WTORS, but which are not, at this time, required for compliance with this document.The contents of this document apply to WTORS used with forward-facing wheelchair-seated children and adults, and apply to passengers and drivers of personally licensed motor vehicles as well as to passengers of motor vehicles used in public and school transportation. While much of the focus of this document is on WTORS that use four-point wheelchair tiedown systems, unless otherwise specified, the provisions of this document are applt, at this time, required for compliance with this document.The contents of this document apply to WTORS used with forward-facing wheelchair-seated children and adults, and apply to passengers and drivers of personally licensed motor vehicles as well as to passengers of motor vehicles used in public and school transportation. While much of the focus of this document is on WTORS that use four-point wheelchair tiedown systems, unless otherwise specified, the provisions of this document are applicable to all types of WTORS, including those that use docking-type wheelchair tiedowns.While the primary focus of this document is a WTORS that is packaged by the manufacturer as a complete system or kit, it is recognized that a significant portion of the WTORS market consists of separate WTORS components and subassemblies, such as anchorage track that is sold to the bus manufacturer, or securement and restraint assemblies that are sold to the transit provider. Manufacturers of such WTORS components and subassemblies may certify their equipment as being in compliance with this document provided that:a. The subassemblies and components intended to be used together to create a WTORS meet all the appropriate requirements of this document, andb. The separately sold components and subassemblies are provided with instructions in accordance with 5.5, where the word "compatible" means tested together to comply with this document.

标准名称：	链条链轮术语
英文名称：	Chains sprockets and accessorie--List of equivalent terms
中标分类：	机械 >> 通用零部件 >> 链传动、皮带传动与键联结
ICS分类：	机械系统和通用件 >> 挠性传动和传送 >> 链传动及其零件
替代情况：	替代GB/T 9785-1988
发布部门：	中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会
发布日期：	2007-04-18
实施日期：	2007-11-01
首发日期：	1988-09-05
作废日期：
主管部门：	中国机械工业联合会
提出单位：	中国机械工业联合会
归口单位：	全国链传动标准化技术委员会
起草单位：	吉林大学、杭州东华链条集团有限公司、诸暨市滚子链条制造有限公司等
起草人：	孟祥宾、张世强、何新德、金玉漠、马锦华、夏国利等
出版社：	中国标准出版社
出版日期：	2007-11-01
页数：	平装16开/页数：36/字数：64千字
计划单号：	20065544-T-604

本标准确定了由中文、英文、法文、德文组成的链条链轮术语，术语按产品的设计和用途分类，内容涉及各类用途的机械链条、附件、辅件和链轮。

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