GB/T 14781-2023 English PDFUS$334.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 14781-2023: Earth-moving machinery - Wheeled machines - Steering requirements Status: Valid GB/T 14781: Historical versions
Basic dataStandard ID: GB/T 14781-2023 (GB/T14781-2023)Description (Translated English): Earth-moving machinery - Wheeled machines - Steering requirements Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P97 Classification of International Standard: 53.100 Word Count Estimation: 18,154 Date of Issue: 2023-09-07 Date of Implementation: 2023-09-07 Older Standard (superseded by this standard): GB/T 14781-2014 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 14781-2023: Earth-moving machinery - Wheeled machines - Steering requirements---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 53.100 CCSP97 National Standards of People's Republic of China Replace GB/T 14781-2014 Earthmoving machinery wheeled machine steering requirements (ISO 5010.2019,IDT) Published on 2023-09-07 Implemented on 2023-09-07 State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface III Introduction IV 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 General requirements 4 4.1 General 4 4.2 Steering system 4 4.3 All steering systems 4 4.4 Overall steering system test 5 4.5 Main steering system 6 4.6 Auxiliary steering system 6 4.7 Power steering system 6 4.8 Steering system with main and backup steering control elements 7 4.9 Ergonomic requirements 7 5 Turn to test site 7 6 Machine test requirements 8 7 Wheel passing circle test procedure 9 8 Steering test 9 8.1 Main steering system test 9 8.2 Auxiliary steering system test 9 8.3 Steering test of backup steering control element 10 9 Test Report 11 10 Usage information12 10.1 General 12 10.2 User Manual 12 Reference 13 Figure 1 Wheeled machine equipped with drum and track wheel assembly 2 Figure 2 Schematic diagram of applying force in 90° vertical direction 5 Figure 3 Schematic diagram of applying force in 180° horizontal direction 5 Figure 4 Schematic diagram of applying force in the main entrance direction 6 Figure 5 Turning to test site 8 Figure 6 Auxiliary steering sensitivity 10 Figure 7 Steering test with other steering control elements (obstacle avoidance test) 11ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 14781-2014 "Steering Requirements for Earthmoving Machinery Tire-type Machines" and is consistent with GB/T 14781-2014. In addition to structural adjustments and editorial changes, the main technical changes are as follows. ---Changed the scope (see Chapter 1, Chapter 1 of the.2014 edition); ---Changed the definitions of "steering system", "power steering system", "steering control element" and "steering angle" (see 3.1, 3.1.2, 3.6, 3.8, 2014 version 3.1, 3.1.3, 3.3, 3.5); ---Added "main steering system", "auxiliary steering system", "wheels", "track wheel assembly", "wheeled machine", "main steering control element" and "backup" Use the terms "steering control element", "total wheel width", "outer wheel passing diameter", "wheel passing circle", "maximum machine speed" and Definition (see 3.1.3, 3.1.4, 3.2, 3.3, 3.4, 3.6.1, 3.6.2, 3.9, 3.10, 3.11, 3.12); ---Deleted "power steering system", "emergency steering system", "tire passing circle", "working circuit pressure", "transmission device" and "steering" Terms and definitions of "wheel" and "safety state" (see 3.1.2, 3.1.4, 3.6, 3.7, 3.8, 3.9, 3.10 of the.2014 edition); ---Changed the terms and definitions under "steering power source" (see 3.5.1, 3.5.2, 3.5.3, 3.2.1, 3.2.2, 3.2.3 of the.2014 edition); ---Changed the general requirements (see Chapter 4, Chapter 4 of the.2014 edition); ---Changed the requirements for "shifting to the test site" (see Chapter 5, Chapter 7 of the.2014 edition); ---Changed the machine test requirements (see Chapter 6, Chapter 8 of the.2014 edition); ---Changed the requirements for "wheel passing circle test procedure" (see Chapter 7, Chapter 9 of the.2014 edition); ---Changed the requirements for "steering test" (see Chapter 8, Chapter 10 of the.2014 edition); ---Added test report and usage information requirements (see Chapter 9 and Chapter 10). This document is equivalent to ISO 5010.2019 "Steering Requirements for Wheeled Machinery for Earthmoving Machinery". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Earthmoving Machinery Standardization Technical Committee (SAC/TC334). This document was drafted by. Science and Technology Branch of XCMG Engineering Machinery Co., Ltd., Huaneng Yimin Coal and Electricity Co., Ltd., Xiamen Yulong Machinery Co., Ltd., Inner Mongolia Northern Heavy Truck Co., Ltd., Fangyuan Mark Certification Group Xiamen Co., Ltd., Tianjin Engineering Machinery Machinery Research Institute Co., Ltd. and Lonking (Shanghai) Machinery Manufacturing Co., Ltd. The main drafters of this document. Han Bin, Zheng An, Chen Xinmin, Li Laiping, Lin Huiting, Zhang Yu, Huang Youcheng, Lu Zhenpo, Wu Hanbin, Ye Wei, Chen Baoqing. This document was first published in.1993, revised for the first time in.2014, and this is the second revision.IntroductionThis document is a Category C standard specified in ISO 12100. This document is particularly intended for the following stakeholder groups representing machinery safety market participants. ---Machine manufacturers (small, medium and large enterprises); ---Health and safety agencies (regulators, accident prevention organizations, market surveillance, etc.) and other parties that may be affected by the above-mentioned stakeholders Influence of the level of machinery safety achieved through documentation. ---Machine users/employers (small, medium and large enterprises); ---Users/employees (e.g., unions, special needs organizations); ---Service providers, such as maintenance services (small, medium and large enterprises); ---Consumer (for machines used by consumers). All the above-mentioned stakeholders may participate in the drafting process of this document. The machinery involved and the contents of hazards, hazardous situations or hazardous events are described within the scope of this document. Since the design and manufacture of machines comply with the requirements of Class C standards, when the requirements of Class C standards are different from those of Class A or Class B standards, At the same time, the requirements of Category C standards take precedence over other standards. As this document does not cover the functional safety of steering systems, guidance on the functional safety of steering systems can be found in the following standards. ISO 15998, ISO /T S15998-2, ISO 13849-1, ISO 19014-1, ISO 19014-2, ISO 19014-3, ISO 19014-4 and ISO /T S19014-5. Earthmoving machinery wheeled machine steering requirements1 ScopeThis document specifies the steering system test used to evaluate the steering capabilities of wheeled and ride-on earth-moving machinery defined in GB/T 8498-2017. test methods and performance criteria. Wheeled machines include machines equipped with wheels, one or more rollers, or track wheel assemblies. This document addresses the following significant hazards, hazards, and hazards associated with wheeled machines that are reasonably foreseeable by the manufacturer and are Hazardous situation or hazardous event. ---Mechanical hazards; ---Ergonomics hazards; ---Hazards caused by maintenance; ---Hazards caused by operating systems; ---Hazards related to driving functions. This document does not contain content related to the functional safety of the steering system. This document does not apply to wheeled machines manufactured before the date of this document.2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 8592-2001 Determination of steering dimensions of tire-type earthmoving machinery (ISO 7457.1997, IDT) GB/T 8595-2023 Control devices for drivers of earthmoving machinery (ISO 10968.2020, IDT) GB/T 21154-2014 Quality measurement methods for complete earthmoving machinery and its working devices and components (ISO 6016.2008, IDT) GB/T 39309-2020 Specification for steel wire or fabric reinforced single pressure type rubber hoses and hose assemblies for hydraulic use (ISO 18752.2014,IDT) ISO 3450.2011 Performance requirements and test methods for braking systems of earth-moving machinery, wheeled or high-speed rubber-tracked machines (Earth-movingmachinery-Wheeledorhigh-speedrubber-trackedmachines-Performancerequire- Note. GB/T 21152-2018 Performance requirements and test methods for braking systems of earthmoving machinery wheeled or high-speed rubber tracked machines (ISO 3450. 2011,MOD) ISO 12100.2010 Safety of machinery design, risk assessment and risk reduction (Safetyofmachinery-General) Note. GB/T 15706-2012 General principles for mechanical safety design risk assessment and risk reduction (ISO 12100.2010, IDT)3 Terms and definitionsThe following terms and definitions as defined in ISO 12100 apply to this document. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 14781-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 14781-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 14781-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 14781-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 14781-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 14781-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
