LY/T 3168-2019Garden machinery -- Edgers with rigid cutting means with lithium-ion battery as power source (English PDF)

6.1 General requirements

6.1.1 Lithium-ion hand-held trimming machine and lithium-electric hand-driven trimming machine shall be capable of rated operation under the following environmental conditions.

a) the altitude does not exceed 1 000 m;

b) The ambient temperature is -5 °C ~ 40 °C, or meet the requirements of the instruction manual;

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

d) 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) Size. ± 1 mm;

b) Time. ± 0.01 s;

c) Speed. ± 0.5%;

d) Temperature. ± 1 °C;

e) Humidity. ± 6%;

f) Mass. ± 1 g;

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 meet the requirements of GB/T 21418.

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

6.2.2 Inspection

The performance inspection of permanent magnet brushless motors shall be conducted in accordance with GB/T 21418.

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

6.3 Overall performance

6.3.1 Starting performance

6.3.1.1 Requirements

Lithium-ion handheld trimming machine and lithium-electric hand-trimming machine should be able to operate Environmental conditions) Normal start.

6.3.1.2 Inspection

6.3.1.2.1 Place the fully equipped lithium-ion handheld trimming machine and lithium-electric hand-trimming machine at -5 ° C ± 2 ° C (or in the instruction manual) (Minimum specified temperature) Start 24 hours after no-load in the environment, start 10 times continuously, and the interval between two adjacent starts is not greater than 10 s, observe whether it can start successfully every time.

6.3.1.2.2 Place the fully equipped lithium-ion handheld trimming machine and lithium-electric push-type trimming machine at 40 °C ± 2 °C (or the instruction manual) the maximum temperature specified in the standard). After 24 h in the environment, start with no load, start 10 times continuously, and the interval between two adjacent starts is not greater than 10 s, observe whether it can start successfully every time.

6.3.2 Cutting diameter

6.3.2.1 Requirements

The cutting diameter of the lithium electric hand-held trimming machine and the lithium electric push-type trimming machine should be consistent with the cutting diameter specified on the nameplate.

6.3.2.2 Inspection

Put the lithium-ion handheld trimming machine and the lithium-electric push-type trimming machine on the test site specified in 6.1.1 to make the cutting plane of revolution Cut the lawn perpendicular to the ground and measure the cutting diameter after the appliance has completely stopped.

6.4 Performance of main components

6.4.1 Handle

6.4.1.1 Requirements

The lithium battery handheld trimming machine should be equipped with 2 independent handles, and the handles should meet the following requirements.

a) The control handle should be firmly positioned and cannot be rotated;

b) During normal operation, the guide handle should not be able to easily rotate freely;

c) When the center point of the control handle is 775 mm 25 mm from the ground, the position of the guide handle should meet the last point of the turning circle of the tool tip and the guide.

The horizontal distance (D) between the forwardmost points of the handle (as specified by the manufacturer) is at least 450 mm, see Figure 3.

In millimeters

Explanation.

1--Control the height of the handle;

2--Cutter tip turning circle;

3-- Hard, flat horizontal test surface.

Figure 3 Dimension D in the handheld trimming machine

6.4.1.2 Inspection

6.4.1.2.1 Control handle for actual operation and visual inspection.

6.4.1.2.2 Rotate the guide handle with a torque of 6 N · m and observe whether the guide handle rotates or moves.

6.4.1.2.3 Verify the position of the guide handle by measurement.

6.4.2 Strap

6.4.2.1 Requirements

A lithium-ion handheld trimming machine with a net mass greater than 6 kg should be equipped with a single or double shoulder strap.

The split battery pack carried by the operator should be provided with a carrying device or accessories, and its use should be described in the instructions. Device or the accessories can be shoulder straps, or others.

Shoulders and straps should meet the following requirements.

a) The length of the strap should be adjustable by the operator, and the use, elastic adjustment and removal of the strap should be described in the instruction manual Bright;

b) It is easy to quickly disengage or equipped with a quick release mechanism to ensure that the battery pack and the lithium battery handheld trimming machine can be quickly separated from the operator.

from.

If equipped with a quick-release mechanism, the quick-release mechanism can be located at the junction of the appliance and the harness or between the harness and the operator to ensure in an emergency, people can be quickly separated from appliances and battery packs. The quick release mechanism should also be able to Open with one hand and no more than two release points.

Note 1. The single shoulder strap is considered to be an easy-to-detach design.

Note 2. If the left and right straps of the shoulder strap are not connected in front of the operator's body, or the left and right straps are connected but can be used on the appliance and battery pack with one hand it is considered to be easy to release if it is released under the gravity of not more than two release points.

6.4.2.2 Inspection

Inspection by inspection and functional test.

Inspection and functional test of the shoulder strap, strap and quick release mechanism of the lithium electric handheld trimming machine when the heaviest and lightest accessories are configured respectively Yes, the inspection of the battery pack's shoulder strap, strap and quick release mechanism is performed when the heaviest and lightest battery pack is configured.

6.4.3 Cutting device controller

6.4.3.1 Requirements

The lithium battery handheld trimming machine and lithium battery manual trimming machine shall provide a cutting device controller, which shall be controlled by two independent, Different actions can drive the cutting device, or the controller structure should be able to pass the test of 6.4.3.2.2. The controller is "on" There should be no locking device and the movement of the cutting element will stop when the controller is released.

6.4.3.2 Inspection

6.4.3.2.1 When the locking device of the cutting device controller is not released, check the function of the controller through operation and observation.

6.4.3.2.2 For the controller of the cutting device to be protected, use a steel ball with a diameter of 100 mm ± 1 mm to touch the controller and observe whether it can If the controller is activated, the controller will be qualified if it is not triggered.

6.4.4 Switch

6.4.4.1 Requirements

After passing 10,000 cycles of testing, the switch should still have normal control functions.

6.4.4.2 Inspection

The inspection of the switch shall be carried out in accordance with the provisions of K.23.1.10 and K.23.1.201 of GB 3883.1-2014.

6.4.5 Adapted battery pack (battery pack)

6.4.5.1 Requirements

The performance of the adapted battery pack (battery pack) shall meet the requirements of IEC 61960-3.

6.4.5.2 Inspection

The performance test of the matched battery pack (battery pack) is carried out in accordance with IEC 61960-3.

6.4.6 Adapter Charger

6.4.6.1 Requirements

The maximum no-load DC output voltage of the adapter charger measured at the factory should not exceed 120 V; the output current should not be lower than the rated output 90% of the current.

6.4.6.2 Inspection

Connect the adapter charger to the circuit shown in Figure 4, apply the rated voltage to the adapter charger, and measure the DC output voltage.

The variable resistor makes the output voltage reach the rated DC output voltage, and then measures the output current.

Explanation.

A-average current ammeter;

B--adaptive charger;

C--capacitor, the capacity (F) is calculated by the following formula.

12.5

pf U

In the formula.

Ir--rated DC output current in amps (A);

p--1, half-wave rectification; 2, full-wave rectification;

f--power frequency in Hertz (Hz);

Ur--rated DC output voltage in volts (V).

I--output current;

R--variable resistor;

T-- adapt to the output terminal of the charger;

V--Average reading voltmeter.

Note 1. The capacitance value of the capacitor can deviate from the calculated value by ± 20%.

Note 2. The capacitor may need to be precharged before the adapter can work.

Figure 4 Circuit for verifying the adapter charger

6.4.7 Connection of Adapter Battery Pack, Adapter Charger and Whole Machine

6.4.7.1 Requirements

6.4.7.1.1 The loading and unloading of the adaptable battery pack and the whole machine shall be easy to operate without jamming.

6.4.7.1.2 The matching battery pack shall be able to be reliably and firmly fixed.

6.4.7.1.3 The connection between the adaptable battery pack and the whole machine shall be reliable and effective.

6.4.7.1.4 The connection between the adapter battery pack (battery pack) and the adapter charger shall be reliable and effective.

6.4.7.2 Inspection

6.4.7.2.1 Check by inserting and removing the adapter battery pack 5 times.

6.4.7.2.2 After installing the adapter battery pack, apply 3 times the weight of the whole machine to the adapter battery pack and check whether the adapter battery pack the mounting position comes out.

6.4.7.2.3 Unplug the fully-charged adapter battery pack and install it in the appliance. Turn it on after each installation and observe the appliance after 1,000 times.

Whether it can work normally and whether the fixing of the adaptable battery pack is reliable and firm.

6.4.7.2.4 For the adaptable battery pack, connect the adaptor charger plug to the rated power supply. After the adaptor charger works normally, it will be completely discharged.

The electric adapter battery is packed into and removed from the charging interface of the adapter charger. After 1,000 times, check whether the connection is reliable and effective; for the adapter battery Group, connect the adapter charger plug to the rated power supply, and after the adapter charger works normally, plug the adapter charger connector into and out of the appliance After the charging interface is connected, check whether the connection is reliable and effective after 1,000 times.

6.5 Security

6.5.1 Stability

6.5.1.1 Requirements

Lithium electric hand push trimming machine should have sufficient stability.

6.5.1.2 Inspection

Place the appliance in any normal use position on an inclined plane at an angle of 10 ° to the horizontal plane, with a battery pack, and observe whether the appliance is turned over inverted.

Note 1. For appliances equipped with rollers, casters or support feet, stability tests may be required on a horizontal surface.

Note 2. Block the casters or rollers to prevent them from rolling.

6.5.2 Protection of power-driven transmission parts other than cutting devices

6.5.2.1 Requirements

6.5.2.1.1 All power-driven transmissions (except cutting devices) shall be protected to prevent the operator from touching them.

6.5.2.1.2 All protective covers should be permanently fixed or meet the requirements of 3.27.1 in GB/T 15706-2012, that is, without the use of tools it cannot be moved, or the appliance is designed to meet the requirements of 3.27.4 in GB/T 15706-2012, that is, the protective cover is not in its protective position.

Out of service.

6.5.2.2 Inspection

Check by observation and operation.

6.5.3 Protective cover for cutting device

6.5.3.1 Requirements

The protective cover of the cutting device of the lithium electric handheld trimming machine and the lithium electric hand pushing trimming machine shall comply with the regulations in Chapter 7 of GB 10395.15-2006 set.

6.5.3.2 Inspection

The inspection of the protective cover of the cutting device shall be carried out in accordance with the provisions of Chapter 7 of GB 10395.15-2006.

6.5.4 Structural integrity

6.5.4.1 Requirements

The structural integrity of the lithium-ion handheld trimming machine and the lithium-electric push-type trimming machine shall comply with the provisions of Chapter 8 of GB 10395.15-2006.

6.5.4.2 Inspection

Structural integrity inspection shall be carried out in accordance with the provisions of Chapter 8 of GB 10395.15-2006.

6.5.5 Degree of protection

6.5.5.1 Requirements

For lithium electric hand-operated edge trimmers with dangerous working voltage, they should meet the protection level of at least IPX4.

For lithium electric hand-operated edge trimmers with working voltage lower than the dangerous voltage, the protection level of at least IPX1 should be met.

Note. For dangerous voltages, see K.3.210 in GB/T 3883.1-2014.

6.5.5.2 Inspection

Lithium electric hand push trimming machine should be tested separately in the battery pack installation and removal states.

Remove all electrical components, covers, and other parts that can be removed without the aid of a tool.

After undergoing corresponding tests, all adjustable parts are adjusted to the most unfavourable position for testing. The test is carried out in accordance with GB/T 4208.

During the test, the li...