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LY/T 3022-2018: Garden machinery. Hand-held chain-saws with lithium-ion battery as power source
LY/T 3022-2018
FORESTRY STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.060.70
B 91
Garden machinery - Hand-held chain-saws with lithium-ion
battery as power source
ISSUED ON: DECEMBER 29, 2018
IMPLEMENTED ON: MAY 01, 2019
Issued by: National Forestry and Grassland Administration
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 6 
4 Model preparation method ... 6 
5 Basic parameters ... 7 
6 Technical requirements and test methods ... 8 
6.1 General requirements ... 8 
6.2 Matching motor performance ... 9 
6.3 Overall performance ... 9 
6.4 Performance of main components ... 11 
6.5 Safety ... 17 
6.6 Durability ... 20 
6.7 Appearance quality ... 22 
6.8 Assembly quality ... 22 
7 Marking, instruction manual, packaging, transport, storage and handling ... 22 
7.1 Marking ... 23 
7.2 Instruction manual ... 24 
7.3 Packaging ... 25 
7.4 Transport ... 26 
7.5 Storage ... 27 
7.6 Handling ... 27 
Appendix A (Informative) Application exception list of restricted substances in the
compliance management catalogue ... 28 
References ... 33 
Garden machinery - Hand-held chain-saws with lithium-ion
battery as power source
1 Scope
This standard specifies the terms and definitions, model preparation methods, basic
parameters, technical requirements, test methods, signs, instruction manuals, packaging,
transport, storage, handling of hand-held chain-saws with lithium-ion battery as power
source (hereinafter referred to as chain-saws with lithium-ion battery).
This standard applies to hand-held chain-saws, which are operated by a single person,
for sawing branches, wood and similar materials; are powered by a rechargeable
lithium-ion battery pack (battery pack) with a nominal voltage not greater than DC 75V,
under normal environmental conditions.
This standard does not apply to:
- Lithium-ion chain-saws for one-handed operation and/or for use at heights, such as
in trees;
- Hand-held chain-saws, which are powered by user-installed universal battery packs
or battery packs;
- Other hand-held chain-saws, which are powered by non-lithium-ion batteries.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 3883.1-2014 Safety of handheld motor operated electric tools - Part 2:
Particular requirements for spray guns for non-flammable liquids
GB/T 3883.14-2007 Safety of hand-held power tools - Part 2: Special requirements
for chain-saws
GB 4343.1 Electromagnetic compatibility - Requirements for household appliances
electric tools and similar apparatus - Part 1: Emission
GB/T 9480 Tractors machinery for agriculture and forestry, powered lawn and
garden equipment - Operators manuals - Content and presentation
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 18516 Portable chain saws - Measurement of cutting rate and fuel
consumption - Engineering method
GB/T 18960 Machinery for forestry - Portable chain-saws - Vocabulary
GB 19726.1 Machinery for forestry - Portable chain-saw safety requirements and
testing - Part 1: Chain-saws for forest service
GB/T 21418 General specification for permanent magnet brushless motor system
GB/T 26572 Requirements of concentration limits for certain restricted substances
in electrical and electronic products
GB/T 34570.1 Safety for rechargeable battery packs and chargers for electric tools
- Part 1: Safety for rechargeable battery packs
LY/T 1187 Forestry machinery - Chain saw - Saw chains
LY/T 1188 Forestry machinery - Chain saw - Guide bars
SJ/T 11364 Marking for controlled uses of hazardous substance from electronic
information products
IEC 60335-2-29 Household and similar electrical appliances - Safety - Part 2-29:
Particular requirements for battery chargers
IEC 61960-3 Secondary cells and batteries containing alkaline or other non-acid
electrolytes - Secondary lithium cells and batteries for portable applications - Part 3:
Prismatic and cylindrical lithium secondary cells and batteries made from them
IEC 62841-1:2014 Electric motor-operated hand-held tools, transportable tools and
lawn and garden machinery - Safety - Part 1: General requirements
IEC 62841-4-1 Electric motor-operated hand-held tools, transportable tools and
lawn and garden machinery - Safety - Part 4-1: Particular requirements for chain
saws
3 Terms and definitions
The terms and definitions, which are defined in GB/T 18960, as well as the following
terms and definitions, apply to this document.
3.1
Nominal voltage
The product of the nominal voltage of a single cell and the number of cells in series.
Note: The unit is volts.
3.2
Cutting efficiency
Under the load of the rated output state, the area of the standard test material, which
is cut by the lithium-ion chain-saw per unit time.
Note: The unit is square centimeters per second.
3.3
Net mass of the machine
In the working state, the mass of the lithium-ion chain-saw, including the guide plate
and saw chain as specified in the installation instructions, the pluggable adaptable
battery pack (except for the split battery pack, which is connected to the whole
machine by a flexible cord), without the knife cover and lubricating oil.
4 Model preparation method
4.1 The model preparation method of lithium-ion chain-saw shall be carried out, in
accordance with the provisions of LY/T 1621.
4.2 The lithium-ion chain saw takes the nominal voltage of the battery pack as the main
power parameter, takes the effective length of the longest guide plate as the main
parameter of the product. The model preparation method is as shown in Figure 1:
h) Maximum linear speed of saw chain, m/s;
i) Cutting efficiency, cm2/s;
j) Noise value (A-weighted sound pressure level and A-weighted sound power level),
dB;
k) Vibration value, m/s2;
l) Product dimensions (length × width × height), mm;
m) Net mass of the machine, kg.
6 Technical requirements and test methods
6.1 General requirements
6.1.1 The lithium-ion chain saw shall be able to run continuously, under the rated
working conditions under the following environmental conditions:
a) The altitude does not exceed 1000 m;
b) The ambient temperature is -15 °C ~ 40 °C, or in accordance with the provisions
of the instruction manual;
c) The relative humidity of the air does not exceed 90%;
d) The air does not contain flammable, explosive, corrosive gas and dust.
6.1.2 During inspection, the precision of the measured value shall be within the
following range:
a) Speed: ±0.1%;
b) Temperature: ±1 °C;
c) Time: ±0.01 s;
d) Humidity: ±6%;
e) Size: ±1 mm;
f) Noise: ±0.5 dB;
g) Voltage: ±1%;
h) Current: ±1%;
i) Push-pull force: ±6%;
j) Torque: ±10%;
k) Angle: ±1°.
6.2 Matching motor performance
6.2.1 Requirements
If a permanent magnet brushless motor is used, its motor performance shall comply
with the provisions of GB/T 21418.
The performance of other motors shall comply with the relevant requirements in GB/T
755.
6.2.2 Inspection
The inspection of the permanent magnet brushless motor is carried out, according to
the provisions of GB/T 21418.
The performance inspections of other motors shall be carried out, in accordance with
the provisions of GB/T 755.
6.3 Overall performance
6.3.1 Starting performance
6.3.1.1 Requirements
The lithium-ion chain saw shall be able to start normally, under the environmental
conditions specified in 6.1.1 (or the environmental conditions specified in the
instruction manual). There shall be no sticking or failure to start, during the starting
process.
6.3.1.2 Inspection
6.3.1.2.1 Install the guide plate and saw chain on the main machine. Apply an
appropriate amount of lubricating oil. Place it in an environment of -15 °C ± 2 °C (or
the lowest temperature specified in the instruction manual) for 24 hours, before starting
with no load. Carry out 10 consecutive starts. The time interval between two adjacent
starts is not more than 10 s. Observe whether the start is successful each time.
6.3.1.2.2 Install the guide plate and saw chain on the main machine. Apply an
appropriate amount of lubricating oil. Place it at a temperature of 40 °C ± 2 °C (or the
highest temperature specified in the instruction manual) for 24 hours, before starting
6.4.6.1 Requirements
The lithium-ion chain saw shall be equipped with a saw chain adjuster, through which
the tension of the saw chain can be adjusted. When adjusting the tension of the saw
chain, there shall be no jamming.
6.4.6.2 Inspection
Check visually that the saw chain adjuster is equipped on the machine. By adjusting the
adjusting device of the saw chain, observe and measure whether the tension of the saw
chain meets the following requirements: When a weight of 1 kg is hung on the center
of the cutting length at the lower part of the chain, the gap between the side link of the
saw chain and the guide plate is not more than 0.017 mm per millimeter length of guide
plate. During the adjustment process, check whether the tensioning and loosening
process of the saw chain is light and reliable, AND whether there is any jamming.
6.4.7 Oil supply device
6.4.7.1 Requirements
The lithium-ion chain saw shall be equipped with an oil supply device, that can provide
lubrication to the saw chain and the guide plate. After the machine starts and reaches
the running speed of the saw chain, the oil supply device shall be able to deliver the
lubricating oil to the lubricant groove of guide plate, as needed within a specified time,
to achieve the purpose of lubricating the saw chain and guide plate.
The fuel tank cap shall have a connecting chain. There shall be clear and firm oil drop
marks, around the fuel tank filling port or on the fuel tank cap.
The inner diameter of the oil filling port of the fuel tank shall not be less than 19 mm.
The structural design of the oil supply device shall ensure that the lithium-ion chain
saw has no oil leakage, under normal working temperature, various working positions
and during transportation. Oil seepage from the ventilation system of the oil supply
device is not regarded as oil leakage.
There shall be no other parts around the tank filler opening, that would interfere with
refueling. It shall be possible to use a funnel to refuel.
For the oil supply device, which is equipped with the oil quantity adjustment function,
its adjustment function shall ensure that the lubrication required for the normal sawing
of the lithium-ion chain saw can be met, even in the state of the minimum oil supply
quantity.
The volume of the fuel tank shall be such, that in the maximum fuel supply state, after
a fully charged battery pack is discharged, the remaining fuel volume in the fuel tank is
not less than 10% of the total volume of the fuel tank.
6.4.7.2 Inspection
Verify fuel supply, fuel cap connecting chain, fuel filler port's size, identification, the
ability to use a funnel for fueling, by inspection and measurement. Rotate the lithium-
ion chain saw in any direction, to check the tightness of the cap of the oil supply device.
The inspection of oil supply performance of the oil supply device shall be carried out,
under normal temperature conditions. Before the inspection, first inject a certain
amount of lubricating oil (equivalent to about 50% of the oil tank volume) into the fuel
tank of the lithium-ion chain saw. Put a clean and dirt-free white cardboard, under the
installed saw chain and guide plate. Turn on the trigger or switch, to make the machine
speed reach the maximum no-load stable speed. Observe whether there is lubricating
oil thrown out within 10 s, AND whether a coherent "oil line" can be formed on the
cardboard within 30 s. For the oil supply device, which is equipped with the oil volume
adjustment function, the inspection of the adjustment function and the oil volume is
carried out, by visually inspecting the change of the thickness of the "oil line", when
the oil supply device is at the maximum and minimum extreme positions.
Fill the fuel tank with oil. Configure the lithium-ion chain saw with an adaptable battery
pack, which has the longest battery life. Start the lithium-ion chain saw. Make it run at
the highest no-load stable speed. Adjust the oil supply device, to make it reach the
maximum fuel supply state. Run the lithium-ion chain saw, until the battery pack is
discharged. Measure the remaining oil in the fuel tank at this time.
6.4.8 Straps (if applicable)
6.4.8.1 Requirements
The split battery pack, which is carried by the operator, shall be provided with a carrying
device or accessories, the method of use of which shall be described in the manual. The
device or accessory can be a shoulder strap, harness or other.
Shoulder straps and harnesses shall meet the following requirements:
a) The size of the strap shall be adjustable by the operator; the use, tightness
adjustment and removal of the strap shall be described in the instructions;
b) It shall be designed for easy removal, OR equipped with a quick release
mechanism to ensure that the battery pack can be quickly released or separated
from the operator.
If equipped with a quick release mechanism, the quick release mechanism can be
located at the junction of the battery pack and the harness OR between the harness and
the operator, to ensure that the person can be quickly separated from the battery pack,
in the event of an emergency. The quick release mechanism shall also be openable, by
one hand under the gravity of the battery pack itself, AND shall not h...