GB/T 26949.17-2023 English PDF (GBT26949.17-2023)

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GB/T 26949.17-2023: Industrial trucks - Verification of stability - Part 17: Towing tractors, burden and personnel carriers
GB/T 26949.17-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.060
CCS J 83
GB/T 26949.17-2023 / ISO 22915-17:2020
Industrial trucks - Verification of stability - Part 17: Towing
tractors, burden and personnel carriers
(ISO 22915-17:2020, IDT)
ISSUED ON: SEPTEMBER 07, 2023
IMPLEMENTED ON: APRIL 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 7
4 Test conditions ... 8
4.1 General requirements ... 8
4.2 Operating conditions ... 8
4.3 Test load ... 8
5 Verification of stability ... 11
Bibliography ... 13
Industrial trucks - Verification of stability - Part 17: Towing
tractors, burden and personnel carriers
1 Scope
This document specifies test methods for verifying the stability of towing tractors,
burden and personnel carriers as defined in ISO 5053-1.
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 8420-2011 Earth-moving machinery - Physical dimensions of operators and
minimum operator space envelope (ISO 3411:2007, IDT)
ISO 5053-1 Industrial trucks - Vocabulary - Part 1: Types of industrial trucks
NOTE: GB/T 6104.1-2018 Industrial trucks - Terminology and classification - Part 1: Types of
industrial trucks (ISO 5053-1:2015, IDT)
ISO 5353:1995 Earth-moving machinery, and tractors and machinery for agriculture
and forestry - Seat index point
NOTE: GB/T 8591-2000 Earth-moving machinery - Seat index point (eqv ISO 5353:1995)
ISO 22915-1 Industrial trucks - Verification of stability - Part 1: General
NOTE: GB/T 26949.1-2020 Industrial trucks - Verification of stability - Part 1: General (ISO
22915-1:2016, IDT)
3 Terms and definitions
For the purpose of this document, the terms and definitions defined in ISO 5053-1 and
ISO 22915-1 apply.
4 Test conditions
4.1 General requirements
Test conditions shall comply with the requirements of ISO 22915-1.
If the vehicle can operate with an elevating operator position, an additional test shall be
conducted at its maximum height. If a device is equipped to automatically limit the
operating speed, the reduced speed shall be used to determine the tilt angle of the tilt
table.
4.2 Operating conditions
In addition to the requirements of ISO 22915-1, during the test it shall consider the
operating weight of the vehicle and all options and accessories approved by the
manufacturer that will reduce the stability of the vehicle after installation.
4.3 Test load
4.3.1 General requirements
The test load of carriers shall consist of a load consistent with 4.3.2 or 4.3.3.
Towing tractors with a load-carrying platform shall be tested according to the method
defined for burden carriers (see 4.3.2).
4.3.2 Burden carriers
The test load shall be placed on the vehicle’s load-bearing platform, ensuring that its
center of gravity (G) is just above the geometric centerline of the load-bearing platform.
The minimum height of the center of gravity (G) shall be 600 mm above the load-
bearing platform (see Figure 1) or the height specified by the manufacturer.
The center of gravity (G) specified by the manufacturer shall be indicated on the
information plate.
The longitudinal position of the center of gravity (G) shall be at the center of the entire
length of the load-bearing platform.
Key:
A-A - longitudinal center plane;
B-B - steer axle;
C-C - rear axle.
Figure 2 -- Schematic diagram of longitudinal center plane and axles
4.3.5 Test 1 and Test 2
The vehicle shall be placed on the tilt table so that the line M-N is parallel to the tilt
axis X-Y of the tilt table. The steered wheel shall be turned so that it is parallel to the
tilt axis X-Y (see Table 1).
The definition of point M is as follows:
a) For vehicles steered by a single steered wheel: point M is the center point of the
contact surface between the steered wheel and the tilt table;
b) For vehicles steered by twin steered wheels: point M is the center point of the
contact surface between the steered wheel nearest to the tilt axis X-Y and the tilt
table;
c) For vehicles steered by two steered wheels: point M is the center point of the
contact surface between the steered wheel nearest to the tilt axis X-Y and the tilt
table.
Point N is defined as the center point of the contact surface between the rear wheel
nearest to the tilt axis X-Y and the tilt table. When multiple rear axles are installed on
the vehicle, it shall select the rear axle nearest to the steer axle.
4.3.6 Test 3, Test 4, Test 5 and Test 6
As shown in Table 1, the vehicle shall be placed on the tilt table so that the longitudinal
center plane A-A is perpendicular to the tilt axis X-Y of the tilt table.
The axle of the steered wheel shall be parallel to the tilt axis X-Y of the tilt table.
NOTE: Test 3 and Test 5 are not applicable to towing tractors without a load platform.