LY/T 3169-2019Garden and forestry machinery - Hand-held chain-saws for tree service with lithium-ion battery as power source (English PDF)

6.1 General requirements

6.1.1 The lithium electric pruning saw should be able to run continuously under rated conditions under the following environmental conditions.

a) Ambient temperature is -15 °C ~ 40 °C (rechargeable environmental range of battery pack. 5 °C ~ 40 °C), or meet Regulations

b) the relative humidity of the air does not exceed 90%;

c) The air is free of flammable, explosive and corrosive gases and dust.

6.1.2 During inspection, the accuracy of the measured values shall be within the following ranges.

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 °.

LY/T 3170-2019

6.2 Matching motor performance

6.2.1 Requirements

If a permanent magnet brushless motor is used, its motor performance shall meet the requirements of GB/T 21418.

The performance of other motors should meet the relevant regulations of GB/T 755.

6.2.2 Inspection

The performance inspection of the permanent magnet brushless motor is carried out in accordance with GB/T 21418.

The performance inspection of other motors shall be conducted in accordance with GB/T 755.

6.3 Overall performance

6.3.1 Starting performance

6.3.1.1 Requirements

The lithium electric pruning saw should be able to start normally under the environmental conditions specified in 6.1.1 (or the environmental conditions specified in the instruction manual).

There should be no jamming or unsuccessful starting during the process.

6.3.1.2 Inspection

According to the provisions of 6.3.1.2 in LY/T 3022-2018.

6.3.2 Rated output power

6.3.2.1 Requirements

The rated output power of the lithium electric pruning saw should meet the requirements in Table 1.

Table 1 Main performance indicators of lithium pruning saws

Sawing length L

Rated output power

Chain speed

Sawing efficiency

Sawing power consumption cm / Wh L<=150 (6 ") >=100 >=6 >=20 >=70 150 (6 ") < L<=200 (8 ") >=250 200 (8 ") < L<=250 (10 ") >=400 250 (10 ") < L<=300 (12 ") >=600 >=10 >=30 >=90 300 (12 ") < L<=350 (14 ") >=800

6.3.2.2 Inspection

After the lithium electric pruning saw is connected to a DC power supply, the load is applied to the motor at the nominal voltage and the load gradually increases from zero. Measure with an instrument the output power of the motor under different loads is shown. When the efficiency of the motor reaches the highest point, the measured output power is the rated output.

power.

6.3.3 Linear speed of saw chain

6.3.3.1 Requirements

The chain speed of the lithium electric pruning saw should meet the requirements in Table 1.

LY/T 3170-2019

6.3.3.2 Inspection

Start the lithium pruning saw under no-load conditions. After running for 15 minutes, use a fully-charged adapter battery pack (battery pack) to measure the emptyness of its output shaft.

Load speed, and calculate the linear speed of the saw chain according to formula (1).

ntN

In the formula.

V--The linear speed of the saw chain in meters per second (m/s);

n--No-load speed of output shaft, the unit is revolution per minute (r/min);

t-pitch of saw chain, unit is millimeter (mm);

N--the number of teeth of the driving sprocket.

6.3.4 Sawing efficiency

6.3.4.1 Requirements

The cutting efficiency of the lithium electric pruning saw should meet the requirements of Table 1.

6.3.4.2 Inspection

Inspection of sawing efficiency shall be carried out in accordance with GB/T 18516.

6.3.5 Sawing power consumption rate

6.3.5.1 Requirements

The cutting power consumption rate of the lithium electric pruning saw should meet the requirements in Table 1.

6.3.5.2 Inspection

The test material was a square wood of 0.1 m × 0.1 m, with a moisture content of 8% to 12%, and a density of 0.4 g/cm3 to 0.5 g/cm3 at this moisture content.

Lithium electric pruning saw is equipped with a fully-charged adaptable battery pack (battery pack) as specified in the instruction manual, a guide for the maximum cutting length, Saw chain assembly, continuous longitudinal sawing of the test material at room temperature until the suitable battery pack (battery pack) is completely discharged, the machine stops running, and records its the area of the cutting material.

The calculation of sawing power consumption is performed according to formula (2).

In the formula.

--Sawing power consumption rate, unit is square centimeter per watt hour (cm2/Wh);

A--Area of sawed material, the unit is square centimeter (cm2);

E--Nominal energy of the adapted battery pack (battery pack), in watt-hours (Wh).

6.4 Performance of main components

6.4.1 Saw chain

6.4.1.1 Requirements

The chain of lithium electric pruning saws shall meet the requirements of LY/T 1187.

6.4.1.2 Inspection

LY/T 3170-2019

The saw chain inspection shall be carried out in accordance with the regulations of LY/T 1187.

6.4.2 Guide plate

6.4.2.1 Requirements

The guide plate of lithium electric pruning saw should meet the requirements of LY/T 1188.

6.4.2.2 Inspection

Inspection of the guide plate is performed in accordance with the regulations of LY/T 1188.

6.4.3 Handlebar

6.4.3.1 Requirements

Lithium electric pruning saw handle should meet the requirements of 4.2.1 in GB 19726.2-2013.

6.4.3.2 Inspection

The strength of the handle should be tested in accordance with the requirements of "displacement <= 50 cm3" in LY/T 1347-1999.

Other inspections of the handlebar shall be carried out in accordance with the provisions of 4.2.2 in GB 19726.2-2013.

6.4.4 Chain brake

6.4.4.1 Requirements

The chain brake release force of the lithium electric pruning saw should be between 20 N and 50 N.

Configure the lithium electric pruning saw according to the guide plate and saw chain specified in the instruction manual, test and calculate the rebound angle and the chain braking angle one by one, both the smaller of the values should not exceed 25°.

Other requirements shall comply with 19.107 of IEC 62841-4-1.:2017.

6.4.4.2 Inspection

The inspection of the saw chain brake is carried out in accordance with 19.107 of IEC 62841-4-1.:2017.

6.4.5 Guide cover

6.4.5.1 Requirements

Lithium electric pruning saws shall be equipped with a guide plate cover, which shall be designed to cover the guide plate during transportation and storage. When the guide is straight down, the guide plate cover must not fall off obviously, and there should be no guide plates or saw chains longer than 50 mm in length.

6.4.5.2 Inspection

Check visually whether the machine is equipped with a guide cover. Place the guide cover on the guide plate, hold the machine with the guide plate vertically downward, observe and measure the guide Exposed length of boards and chains.

6.4.6 Chain adjustment device

6.4.6.1 Requirements

The lithium electric pruning saw should be equipped with a chain adjustment device, through which the tension of the chain can be adjusted. When adjusting the tension of the saw chain, no stuck or stuck.

LY/T 3170-2019

6.4.6.2 Inspection

According to the provisions of 6.4.6.2 in LY/T 3022-2018.

6.4.7 Oil supply device

6.4.7.1 Requirements

The lithium electric pruning saw should be equipped with an oil supply device that can provide lubrication to the saw chain and the guide plate. When the machine starts and reaches the saw chain running speed After that, the oil supply device should be able to deliver the lubricating oil to the oil groove of the guide plate within the required time to achieve the purpose of lubricating the saw chain and the guide plate.

The fuel tank cap should have a connecting chain. There should be clear and firm oil drop marks around the fuel filler port of the fuel tank or on the fuel tank cap.

The inner diameter of the fuel tank filling port should not be less than 19 mm.

The structure design of the oil supply device should ensure that the lithium electric pruning saw has no oil leakage at normal working temperature, various working positions and during transportation.

Oil leakage from the oil supply system ventilation system is not considered an oil leak.

There should be no other parts around the fuel filler of the fuel tank that hinder refueling. It should be possible to refuel using a funnel.

For the oil supply device equipped with an oil quantity adjustment function, its adjustment function should ensure that it can meet the lithium electric pruning saw at the minimum oil supply state.

Lubrication required for normal sawing.

The volume of the fuel tank should meet the requirements of maximum fuel supply. After a fully-charged battery pack (battery pack) is discharged, the amount of oil is not less than 10% of the total volume of the fuel tank.

6.4.7.2 Inspection

Through observation and measurement, check the fuel tank cap connection chain, the size of the fuel injection port, the marking, and whether the funnel can be used for refueling. Rotate lithium in any direction Electric pruning saw to check the tightness of the cover of the oil supply unit.

The oil supply performance inspection of the oil supply device shall be carried out at normal temperature. Before inspection, first fill a certain amount of lubricant into the fuel tank of the lithium electric pruning saw.

Lubricating oil (equivalent to about 50% of the fuel tank volume), put a clean, dirt-free white cardboard under the saw chain and guide plate in place, and start the trigger or switch makes the machine speed reach the highest no-load stable speed. Observe whether the lubricant is thrown out within 10 s, and the cardboard is within 30 s.

Whether it can form a coherent "oil line." For the oil supply device equipped with an oil quantity adjustment function, the adjustment function and the amount of oil Visually check the change in the thickness of the "oil line" when the oil supply device is at the maximum and minimum limit positions.

The fuel tank is full, and the lithium battery pruning saw is equipped with an adaptable battery pack (battery pack) with the longest battery life. The fuel supply device is adjusted to the maximum.

In the oil supply state, a lithium electric pruning saw is used to cut the moisture content of 8% to 12%, the density is 0.4 g/cm3 to 0.5 g/cm3, and the size is 0.1 m × 0.1 m.

Square wood until the end of the discharge of the adapted battery pack (battery pack), and measure the remaining amount of fuel in the fuel tank at this time.

6.4.8 Strap (if applicable)

6.4.8.1 Requirements

The strap of the lithium electric pruning saw should meet the requirements of 6.4.8.1 in LY/T 3022-2018.

6.4.8.2 Inspection

The inspection of the strap shall be carried out in accordance with 6.4.8.2 of LY/T 3022-2018.

6.4.9 Mounting device

6.4.9.1 Requirements

A hook ring should be provided at the joint of the lithium electric pruning saw to connect the rope or tool belt. The diameter of the eyelet of the mounting ring should not be less than 10 mm.

The mounting device should be able to carry six times the lithium electric pruning saw machine (the fuel tank is full of oil, the maximum capacity of the matched battery pack, the longest guide plate and the saw chain) the weight of.

LY/T 3170-2019

The position of the hooking device should be able to ensure that after the lithium electric pruning saw is suspended, the guide plate faces downward.

6.4.9.2 Inspection

Check the mounting device by observation and measurement.

6.4.10 Switch

6.4.10.1 Requirements

The switch of the lithium electric pruning saw should meet the requirements of 6.4.9.1 in LY/T 3022-2018.

6.4.10.2 Inspection

According to the provisions of 6.4.9.1 in LY/T 3022-2018.

6.4.11 Adapted battery pack (battery pack)

6.4.11.1 Low-pressure aging performance

6.4.11.1.1 Requirements

The capacity of the adaptable battery pack (battery pack) should not be less than 85% of the rated capacity during the entire test cycle.

6.4.11.1.2 Inspection

The test method is as follows.

a) The fully charged battery pack is discharged at a current of 0.2 It A to the single-cell cut-off voltage specified by the manufacturer;

b) continue to discharge to a single 0.5 V;

c) Immediately put in a temperature box of 60 °C ± 2 °C and store for 10 days.

d) Take out the battery pack and charge it with an adapter charger. After full charge, discharge it at 0.2 It A to the battery pack discharge cut-off voltage.

Loop 5 cycles and record the capacity of the adapted battery pack (battery pack) for each cycle.

6.4.11.2 High and low temperature storage performance

6.4.11.2.1 Requirements

After the test, the battery pack capacity should not be less than 80% of the rated capacity.

6.4.11.2.2 Inspection

Put the fully discharged adapter battery pack (battery pack) in the environment of 60 °C ± 2 °C for 7 days, then take it out and leave it at room temperature for 2 h.

Then, after the adapter charger is fully charged, use 5 ItA to discharge until the disc...