Detail of JT/T 155-2021

Introduction of JT/T 155-2021

Automotive lift 1 Scope This standard specifies the product classification, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of automotive lifts. This standard is applicable to the design, production, and inspection of automotive lifts with a rated lifting load not exceeding 20,000kg, and it may be used as a reference for other types of automotive lifts. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 191 Packaging - Pictorial marking for handling of goods GB 2894-2008 Safety signs and guideline for the use GB/T 3765 24° cone connectors - Specification GB/T 3766 Hydraulic fluid power - General rules and safety requirements for systems and their components GB/T 3768 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane GB/T 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements GB/T 5653 Flared couplings - Specification GB/T 5972 Cranes - Wire ropes - Care, maintenance, installation, examination and discard GB/T 6074 Leaf chains, clevises and sheaves - Dimensions, measuring forces and tensile strengths GB/T 6995.2 Markings for electric wires and cables - Part 2: Standard colours GB/T 13306 Plates GB/T 13384 General specifications for packing of mechanical and electrical product GB/T 20118 Steel wire ropes for general purposes JB/T 7949 Weld outer dimensions for steel construction JB/T 10205 Hydraulic cylinder 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 automotive lift device used to support a part of the chassis or body of an automobile to lift or lower the automobile 3.2 rated lifting load maximum allowable mass that an automotive lift can lift or lower within the effective working stroke range 3.3 maximum lifting height maximum vertical movement distance of the lowest contact support surface of the automotive lift and the automobile relative to the ground 3.4 synchronizer device that keeps the working lifting platform of an automotive lift lifting (lowering) simultaneously 3.5 descending volume natural vertical lowering distance at the working position of an automotive lift 4 Product classification 4.1 Classification Automotive lifts (hereinafter referred to as "lifts") are divided into hydraulic lifts and mechanical lifts according to transmission mode, and into post lifts and post-free lifts according to structure. 4.2 Product model See Figure 1 for the representation of product model. Figure 1 Representation of product model Example 1: QJ-YJ-50A refers to a hydraulic scissor lift with a lifting load of 5,000kg, which is improved for the first time. Example 2: QJ-J-2-30C refers to a mechanical 2-post lift with a lifting load of 3,000kg, which is improved for the third time.

Contents of JT/T 155-2021

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification 5 Technical requirements 6 Test methods 7 Inspection rules 8 Marking, packaging, transportation and storage