Combined test method for durability and dust resistance of power tool switches

Abstract

The present application relates to the technical field of electric tool testing, and discloses a combined testing method for the durability and dustproof electrical performance of an electric tool switch, which comprehensively evaluates the performance of the electric tool switch through a specially designed testing device. The method takes a ring-shaped track-type detection conveying belt as a carrier, sequentially sets an electric tool mounting area, a switch batch durability testing area, a switch dustproof detection area and a current flow detection area, and forms a complete testing circulation system. The method can automatically adjust testing parameters according to the resistance characteristics of different electric tool switches; the switch dustproof detection area forms a sealed cavity through a sealed push-pull air cylinder and a surrounding shell, injects test dust of a specific concentration into the cavity, and simultaneously controls the system to drive the electric tool switch to perform a preset number of opening and closing cycle operations; and the current flow detection area comprehensively tests the electrical on-off performance of the electric tool through a voltage detection part, a current detection part, a resistance detection part, an insulation detection part and a temperature detection part.

Description

Technical Field

[0001] The present invention relates to the technical field of power tool testing, and in particular to a combined testing method for the durability and dustproof electrical performance of power tool switches, which is particularly suitable for comprehensive performance evaluation and quality control of various power tool switches. Background Art

[0002] Power tools are indispensable equipment in modern industry and home renovation. Their performance stability and operational safety are directly related to the user experience and production efficiency. Among the various components of a power tool, the switch mechanism is one of the most frequently operated, and its durability and reliability have a decisive impact on the overall performance of the device. Furthermore, since power tools are often used in dusty environments, the dust resistance of the switch is also a key factor in ensuring safe operation.

[0003] At present, the testing methods for power tool switches have the following main deficiencies:

[0004] Single testing method: Existing testing methods usually test a single performance of the switch, such as only testing the mechanical durability of the switch or only testing the electrical on-off performance, and lack a comprehensive evaluation of the comprehensive performance of the power tool switch.

[0005] Low testing efficiency: Traditional testing methods often use a single device to test a single product, which cannot achieve batch testing, resulting in low testing efficiency and high time cost.

[0006] Fixed test parameters: Existing test devices are usually designed for specific models of power tools and lack adaptability. They are unable to automatically adjust test parameters according to different switch characteristics, resulting in a lack of universality in test results.

[0007] Single test environment: Existing test methods are mostly conducted under ideal conditions, lacking consideration of factors such as dust, vibration, and impact that may be encountered in actual working environments. This leads to deviations between test results and actual usage effects.

[0008] Fragmented testing processes: Mechanical durability testing, dustproof performance testing, and electrical performance testing of switches are usually completed by different equipment at different times. The lack of unified testing processes and standards leads to poor consistency and comparability of test results.

[0009] Therefore, a combined testing method is needed to comprehensively evaluate the durability, dustproof performance and electrical performance of power tool switches, realize automated, batch and standardized testing, improve testing efficiency and accuracy, and provide a reliable basis for the quality control and improvement optimization of power tools. Summary of the Invention

[0010] In response to the above problems, the present invention provides an automated batch testing method that can simultaneously test the mechanical durability, dustproof performance and electrical switching performance of power tool switches, and realizes a comprehensive evaluation of different models of power tools through an adaptive testing mechanism.

[0011] One of the objectives of the present invention is achieved through the following technical solution: a combined testing method for the durability and dustproof electrical performance of a power tool switch, the method being achieved through the following steps:

[0012] Step 1: Place the power tool to be tested on the mounting position of the endless crawler-type test conveyor in the power tool mounting area. The mounting position includes a mounting platform, a baffle, and a cover plate detachably connected to the baffle. The mounting platform is provided with a mounting groove that matches the shape of the lower part of the power tool.

[0013] Step 2: The installed power tools are transported to the switch batch durability test area. The test drive disc with gradient depth spherical slots and the elastic embedded ball pressing cam cooperate with each other to automatically adjust the test parameters according to the resistance characteristics of different power tool switches, and perform batch durability testing on the power tool switches.

[0014] Step 3: The power tool that has completed the durability test is transported to the switch dustproof testing area. The sealing push-pull cylinder pushes the connecting plate to drive the surrounding shell to close to form a sealed cavity. A specific concentration of test dust is injected into the sealed cavity. At the same time, the control system drives the power tool switch to perform a preset number of opening and closing cycles.

[0015] Step 4: The power tool that has completed the dustproof test is transferred to the current flow detection area, where a comprehensive electrical continuity and breaking performance test is performed on the power tool using the voltage detection section, current detection section, resistance detection section, insulation detection section, and temperature detection section.

[0016] Step 5: Based on the preset judgment criteria, comprehensively evaluate the power tool switch performance and generate a test report.

[0017] Preferably, the testing method sequentially arranges an electric tool installation area, a switch batch durability testing area, a switch dustproof testing area and a current flow testing area on an annular crawler-type testing conveyor belt to form a complete testing cycle system, thereby realizing the automation and continuity of the testing process.

[0018] Preferably, the switch batch durability test area adopts a test driving disk with a gradient depth spherical slot and a pressing cam matching structure of an elastic embedded ball, which automatically adjusts the test parameters according to the resistance characteristics of different power tool switches, so that a single test device can adapt to and test multiple models of power tool switches with different resistance characteristics.

[0019] Preferably, the switch dustproof detection area pushes the connecting plate through the sealing push-pull cylinder to drive the surrounding shell to close to form a sealed cavity, and injects test dust of a specific concentration into the sealed cavity to simulate the dust conditions that the power tool may encounter in the actual use environment, and comprehensively evaluate the dustproof performance of the switch.

[0020] Preferably, the current flow detection area is equipped with a voltage detection unit, a current detection unit, a resistance detection unit, an insulation detection unit and a temperature detection unit to comprehensively evaluate the electrical performance of the power tool after the dust test, ensuring that the product can still maintain good electrical safety and functional stability in a dust environment.

[0021] Preferably, the test method can also replace the switch dustproof detection area with a vibration and shock combined test area, and evaluate the durability and electrical performance of the power tool switch under vibration and shock conditions through a multi-axis vibration test system and a shock response test system.

[0022] In summary, the present invention has the following advantages compared with the prior art:

[0023] The combined test method for the durability and dustproof electrical performance of power tool switches provided by the present invention achieves comprehensive evaluation and efficient testing of power tool switch performance through innovative technical design and process optimization. The method uses an annular crawler-type test conveyor belt to organically connect the power tool installation area, the switch batch durability test area, the switch dustproof test area, and the current flow test area, forming a complete test cycle system, which makes the test process automated and continuous. At the same time, through the adaptive testing mechanism of the gradient depth spherical slot and the elastic interlocking ball, a single test device can automatically adjust the test parameters according to the resistance characteristics of different power tool switches, which is suitable for batch testing of various models of power tools, significantly improving the versatility and efficiency of the test. In the dustproof test phase, a sealed push-pull cylinder is combined with an enclosing shell to form a sealed cavity, and a specific concentration of test dust is injected to truly simulate the operating conditions of the power tool in an actual working environment. The electrical performance test phase comprehensively evaluates the electrical safety and functional stability of the power tool in a dusty environment through the comprehensive testing of multiple parameters. In addition, the method can flexibly replace the dustproof test area with a vibration and shock combined test area, further expanding the test dimension. Overall, the integrated testing method of the present invention not only solves the problems of the existing technology such as single testing method, low efficiency, fixed parameters, and unrealistic environment, but also reduces testing costs through automated batch testing, and provides a reliable quality control basis through comprehensive performance evaluation. It has important practical value for improving the quality of power tool products and user safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0025] Figure 1 This is a schematic diagram of the workflow of Example 1;

[0026] Figure 2 This is a schematic diagram of the structure of Example 1 without the protective housing;

[0027] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the workflow of the durability test in Example 1;

[0029] Figure 5 Schematic diagram of the electrical performance test process in Example 1;

[0030] Figure 6 Schematic diagram of the work flow of the switch dustproof test in Example 1;

[0031] Figure 7 Schematic diagram of the structure of the elastic embedded ball in the pressing cam in Example 1;

[0032] Figure 8 This is a schematic diagram of the structure of the pressing cam and the locking and fixing device of the interlocking separation control assembly in Example 1, partially cut away for easier observation;

[0033] Figure 9 This is a schematic diagram of the structure of the pressing cam and the locking and fixing device of the interlocking separation control assembly in Example 1, partially cut away for easier observation;

[0034] Figure 10 for Figure 9 A partial enlarged view of point I in the middle;

[0035] Figure 11 This is a schematic structural diagram of the elastic interlocking ball, mounting groove and other components in Example 1;

[0036] Figure 12 This is a schematic diagram of the structure of the dust testing device in Example 1, which is partially cut away for easier observation;

[0037] Figure 13 Schematic diagram of the vibration and shock combined test workflow in Example 2.

[0038] Markings in the figure: power tool 01, power tool installation area 02, switch batch durability test area 03, switch dustproof detection area 04, current flow detection area 05, vibration and impact combined test area 06, protection frame 10, detection conveyor belt 20, installation position 21, socket 22, placement table 211, baffle 212, cover 213, placement groove 2111, switch batch test device 30, drive shaft 31, press test structure 32, test drive disk 321, press cam 322, engagement and separation control component 323, spherical slot 3211, elastic engagement ball 3221, installation slot 3222, telescopic spring 32 23. Push-pull sleeve 3231, self-rotating counterplate 3232, first interlocking return spring 3233, fixed sleeve 3234, interlocking pushing cylinder 3235, frustum portion 3236, annular portion 3237, pressing and fixing device 50, dust testing device 70, air blowing and dust collection cabinet 71, air blowing duct 721, dust collection duct 722, first enclosing shell 731, second enclosing shell 732, bottom plate 741, connecting plate 742, sealed push-pull cylinder 743, multi-axis vibration testing system 81, impact response testing system 82, environmental isolation device 83, programmable impactor 821, impact response monitoring device 822. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the embodiments shown in all the accompanying drawings:

[0040] Example 1

[0041] See also Figure 1 The present invention provides a combined test method for the durability and dustproof electrical performance of the switch of an electric tool 01. The method is implemented through a specially designed test device, and is intended to comprehensively evaluate the comprehensive performance of the electric tool after the switch durability test. The test includes the mechanical performance of the switch, the dustproof performance, and the electrical on-off performance. The test method is based on a complete test system, which is mainly composed of a protective frame 10, and an annular crawler-type detection conveyor belt 20 is arranged inside the protective frame 10. The detection conveyor belt 20 is sequentially formed with an electric tool installation area 02, a switch batch durability test area 03, a switch dustproof detection area 04, and a current flow detection area 05 along its conveying direction, forming a complete test cycle system. This method realizes the comprehensive test and evaluation of the performance of the electric tool switch through the sequential coordination of these four test areas.

[0042] See also Figure 1The test process in this article primarily includes the following steps: first, installing the power tool under test in the power tool installation area 02; second, conducting a mechanical durability test on the switch in the switch batch durability test area 03; then, conducting a dustproof performance test on the switch in the switch dustproof test area 04; and finally, conducting an electrical continuity test in the current flow test area 05. This sequential testing process allows for a comprehensive assessment of the performance of power tool switches under various operating conditions.

[0043] Before implementing the above test method, the test system needs to be configured. Figure 2-Figure 3 The test conveyor belt 20 is evenly distributed with multiple mounting positions 21 for installing power tools. Each mounting position 21 includes a placement platform 211, baffles 212 located on both sides of the placement platform 211, and a cover 213 detachably connected to the baffles 212. The upper end of the placement platform 211 is provided with a placement groove 2111 that matches the shape of the lower part of the power tool to ensure stable placement of power tools of different models. A socket 22 is provided in front of each mounting position 21 for providing power to the power tool to test its electrical performance. This structural design allows the testing method to be adapted to different models of power tools, improving the applicability and versatility of the method.

[0044] Reference Figures 1-12 The first step of this test method is to prepare the power tool for installation. Figure 2-Figure 3 The specific implementation is as follows: In power tool installation area 02, the operator places the power tool to be tested in slot 2111, ensuring that the power tool fits the slot and is securely in place. The operator then connects cover 213 to baffle 212 to initially secure the power tool. Finally, the operator checks the connection between the power tool and socket 22 to ensure reliability for subsequent electrical testing. This step lays the foundation for subsequent testing, ensuring the power tool's positional stability and the reliability of the electrical connection during testing.

[0045] The second step of the test method is the switch durability test step, which is the core of this method. Figure 4In the switch batch durability test area 03, this method adopts an innovative adaptive press test mechanism, which can automatically adjust the test parameters according to the switch characteristics of the same or different models of power tools. For example: in the light electric drill test, the switch of a light electric drill usually has a smaller trigger force, about 8N; in the medium electric hammer test, the switch trigger force of a medium electric hammer is larger, about 15N; in the heavy angle grinder test, the switch trigger force of a heavy angle grinder is very large, about 25N. The specific implementation process is as follows: First, the power tool is firmly positioned by the clamping fixture 50 to ensure that the power tool will not move during the test; then, the switch batch test device 30 is started, which drives the press test structure 32 through the drive shaft 31 to perform a batch durability test on the power tool switch.

[0046] The press test structure 32 is a key mechanism for realizing the durability test of the switch, which includes a test driving disk 321 that is slidably matched with the drive shaft 31 through a keyway structure, a press cam 322 that is matched with the test driving disk 321, and an engaging and separating control component 323. The periphery of the test driving disk 321 is provided with a plurality of groups of spherical slots 3211, which gradually deepen along the rotation direction of the test driving disk 321 to form a depth gradient, so that the same test driving disk 321 is suitable for testing various models of electric tool switches with different switch resistance characteristics. The elastic engaging ball 3221 on the press cam 322 can be engaged with the spherical slot 3211 on the test driving disk 321, and the spherical slot of appropriate depth is automatically selected for engagement according to the actual resistance characteristics of the electric tool switch. This adaptive design is a unique advantage of this testing method, which enables a single testing device to simultaneously adapt to and test electric tool switches with various different resistance characteristics. The elastic interlocking ball 3221 can be realized by providing a mounting groove 3222 and a telescopic spring 3223 on the pressing cam 322 , or other methods of realizing the function may be used.

[0047] The switch durability test operates according to the following principles and determination method: When the test begins, the test drive disc 321, driven by the drive shaft 31, begins to rotate. The spherical grooves 3211 on its periphery engage with the elastic balls 3221 on the pressing cam 322. This engagement generates contact friction, causing the test drive disc 321 to rotate with the pressing cam 322, enabling the pressing cam 322 to press the power tool switch. One complete rotation completes the test cycle.

[0048] The principle of the gradient fitting design in the test method ensures that the system can automatically adapt to different switch resistance characteristics. During initial testing, the elastic fitting ball 3221 is first fitted with the shallowest spherical notch 3211. If the electric tool switch resistance is small, the shallow notch can provide sufficient driving force; for electric tools with larger switch resistance, when the pressing cam 322 touches the surface of the electric tool switch, if the fitting friction provided by the shallow notch is not enough to overcome the switch resistance, the pressing cam 322 will stop rotating, while the test drive disc 321 continues to rotate. With the test drive disc continuing to rotate, the elastic fitting ball 3221 will be refitted with the deeper spherical notch 3211 to obtain greater driving force. This self-adaptive mechanism enables the test method to simultaneously test multiple different models of electric tools without changing the test device.

[0049] For electric tool switches that meet performance requirements, after the elastic fitting ball 3221 is successfully fitted with the spherical notch 3211 of the appropriate depth, the pressing cam 322 will be able to complete the entire switch pressing action. The system monitors the movement state of the pressing cam 322 through the equipped precision sensor, records its movement trajectory and distance change curve, and automatically determines it to be qualified. For switches with severe sticking or other faults, even the maximum fitting friction provided by the deepest spherical notch 3211 cannot drive the pressing cam 322 to complete a full rotation, and the system determines that the switch has a performance fault.

[0050] During the switch durability test, this method also includes a failure response mechanism. This mechanism is executed by the interlocking and separating control component 323, which includes: a push-pull sleeve 3231: connected to the test drive disk 321 by a detachable screw for transmitting motion; a self-rotating abutment plate 3232: movably sleeved on the drive shaft 31, with one end directly abutting the test drive disk 321; a first interlocking return spring 3233: connecting the self-rotating abutment plate 3232 and the fixed sleeve 3234 to provide a restoring force; the fixed sleeve 3234: firmly sleeved on the drive shaft 31, serving as the basic support for the entire component; an interlocking push cylinder 3235: arranged above the frustum 3236 to provide control force; the frustum 3236: as a specially designed part of the push-pull sleeve 3231, the small end faces the test drive disk 321; the annular portion 3237: integrally arranged with the frustum 3236 away from the end of the test drive disk 321; when a jam of the power tool switch is detected during the test, the interlocking and separating control component 323 is triggered to work. The piston rod of the mating push cylinder 3235 extends downward and acts on the inclined surface of the truncated cone 3236, pushing the push-pull sleeve 3231 axially along the drive shaft 31, disengaging the test drive plate 321 from the pressing cam 322, thus preventing equipment damage. Simultaneously, the system records the fault signal and marks the faulty product. After the test is complete, the faulty product is transmitted back to the power tool installation area 02 for removal, preventing it from entering subsequent testing steps and improving overall testing efficiency.

[0051] The third step of the testing method is the switch dustproof performance test. After the power tool that passes the durability test is transported via the test conveyor 20 to the switch dustproof test area 04, the system activates the dust test device 70. This method design specifically places the dustproof test area before the current flow test area 05, ensuring that the power tool completes the dust test before the electrical performance test, comprehensively evaluating the power tool's switching performance in a dusty environment. The dustproof test steps are as follows: First, the sealing push-pull cylinder 743 pushes the two connecting plates 742 along the slide rails of the base plate 741, driving the first and second enclosures 731, 732 to close and completely seal the power tool. Then, the air blowing dust collection cabinet 71 injects a specific concentration of test dust into the sealed cavity through the air blowing duct 721. Simultaneously, the control system drives the power tool switch to perform a preset number of open and close cycles. Finally, the dust collection duct 722 recovers the dust in the cavity, and the system evaluates the power tool's dustproof performance. This dust test method can simulate the dust conditions that power tools may encounter in actual use environments and comprehensively evaluate the dust resistance performance of switches.

[0052] The fourth and final step of the testing method is the electrical performance test. After the power tool completes the dustproof test, the test conveyor 20 transports it to the current flow detection area 05. Here, the method uses the equipped electrical parameter detection system to conduct a comprehensive electrical performance evaluation of the power tool. The specific testing process includes the following: First, the voltage detection unit detects the power tool's operating status at the specified voltage; then, the current detection unit measures the current value during startup and normal operation; then, the resistance detection unit measures the resistance of the power tool's internal circuit; then, the insulation detection unit detects the insulation resistance between the power cord and the casing; and finally, the temperature detection unit monitors temperature changes during operation. These electrical parameter tests comprehensively evaluate the power tool's electrical performance after the dust test, ensuring that the product maintains good electrical safety and functional stability in dusty environments.

[0053] After completing the electrical performance test using this combined testing method, the system comprehensively evaluates the power tool's performance based on pre-defined criteria and generates a complete test report. Power tools that pass all test items are deemed qualified by the system; those that fail any test item are deemed unqualified and clearly identified, providing a basis for subsequent improvements.

[0054] Furthermore, a key feature of this testing method is its ability to batch test the performance of power tool switches. Multiple sets of testing equipment are deployed in the switch batch durability testing area 03, multiple sets of dust testing equipment are deployed in the switch dust protection testing area 04, and multiple sets of electrical parameter detection systems are deployed in the current flow detection area 05. This allows for simultaneous testing of multiple power tools, significantly improving testing efficiency. The system's designed testing conveyor 20 serves as a link between the various testing areas, ensuring the continuity and automation of the entire testing process.

[0055] Example 2: Vibration and shock combined test area

[0056] like Figure 13 As shown, the second embodiment of the present invention provides a method for combined durability and electrical performance testing of power tool switches under vibration and shock conditions. This embodiment retains the original basic structure of the endless crawler-type test conveyor 20, installation area 02, durability test area 03, and electrical performance test area 05, but replaces the original dustproof test area 04 with a combined vibration and shock test area 06.

[0057] Vibration and shock test area 06 consists of three main components: a multi-axis vibration test system 81, a shock response test system 82, and an environmental isolation device 83. The multi-axis vibration test system 81 includes a horizontal vibration platform and a vertical vibration device, capable of simultaneously simulating vibration in the X, Y, and Z directions. The shock response test system 82 includes a programmable impactor 821 and a shock response monitoring device 822. The environmental isolation device 83 ensures that vibration and shock during testing do not affect other parts of the test system.

[0058] Preparation before vibration test: When the power tool that has completed the switch durability test is transferred to the vibration and shock combined test area 06, the environmental isolation device 83 is first activated to isolate the test area from other areas.

[0059] Vibration test steps:

[0060] S1 starts the multi-axis vibration test system 81 and performs a full range vibration test on the power tool according to preset vibration spectrum parameters (frequency range: 10-2000 Hz, acceleration: maximum 10g);

[0061] During the S2 vibration process, the system monitors the vibration response characteristics of the power tool switch through the built-in micro accelerometer. At the same time, the control system drives the power tool switch to open and close at different frequencies to test the functional stability of the switch under vibration conditions.

[0062] The S3 system records the resistance change curve of the switch contacts during vibration and identifies possible poor contact.

[0063] Impact test steps:

[0064] After the S1 vibration test is completed, the shock response test system 82 is started;

[0065] The S2 programmable impactor 821 applies impact forces in different directions to the power tool according to preset parameters (half-sine wave, 15g-30g, 11ms);

[0066] After each impact in S3, the system immediately drives the switch to perform opening and closing operations to test the response performance of the switch after the impact;

[0067] S4 The shock response monitoring device 822 records the changes in the trigger characteristics of the switch before and after the shock.

[0068] Data analysis and evaluation:

[0069] The system compares the changes in switch performance parameters before and after vibration and before and after impact, calculates the vibration transfer function and the mechanical resonance frequency of the switch, evaluates the vibration resistance of the switch structure design, analyzes the impact response curve, evaluates the shock resistance of the switch structure, and generates a comprehensive performance evaluation report.

[0070] Test result determination

[0071] The system determines the vibration and shock performance of power tool switches based on the following criteria:

[0072] 1. The switch contact resistance change under vibration conditions does not exceed 20% of the initial value;

[0073] 2. The change in the switch trigger force after impact does not exceed 15% of the initial value;

[0074] 3. After vibration and shock testing, the switch's electrical on / off function is normal, with no obvious sticking or contact bouncing;

[0075] 4. The internal structure of the switch is not obviously loose or damaged.

[0076] The above description of the disclosed embodiments will make it apparent to those skilled in the art that various modifications to the general embodiments defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined test method for durability and dustproof electrical performance of power tool switches, characterized in that: The method is implemented by the following steps: Step 1: Place the power tool to be tested on the mounting position of the endless crawler-type test conveyor in the power tool mounting area. The mounting position includes a mounting platform, a baffle, and a cover plate detachably connected to the baffle. The mounting platform is provided with a mounting groove that matches the shape of the lower part of the power tool. Step 2: The installed power tool is transported to the switch batch durability test area, and a batch durability test is performed on the power tool switch through a press test structure, wherein the press test structure includes a test driving disk that is slidably engaged with the drive shaft through a keyway structure, a pressing cam matched with the test driving disk, and an engagement and separation control assembly. The periphery of the test driving disk is provided with multiple groups of spherical grooves, which gradually deepen along the rotation direction of the test driving disk to form a depth gradient. The pressing cam is provided with an elastic engaging ball, which is realized by a mounting groove and a telescopic spring provided on the pressing cam. The chimeric separation control component includes: Push-pull sleeve: connected to the test drive disc through detachable screws, used to transmit motion; Self-rotating abutment plate: movably sleeved on the drive shaft, with one end directly abutting against the test drive disc; First embedded return spring: connects the self-rotating plate and the fixed sleeve to provide restoring force; Fixed sleeve: firmly sleeved on the drive shaft, serving as the basic support for the entire assembly; Chiming push cylinder: set above the truncated table to provide control force; Cone part: As a special design part of the push-pull sleeve, the small end faces the test drive disc; Ring part: It is integrally provided with the truncated cone part and is away from one end of the test driving disk; During the test, the test driving disk rotates under the drive shaft, and the contact friction force generated by the engagement of the elastic engaging ball and the spherical slot drives the pressing cam to rotate together to perform a pressing action on the power tool switch; wherein, the elastic engaging ball is initially engaged with the shallowest spherical slot. When the pressing cam touches the surface of the power tool switch, if the engagement friction force provided by the shallow slot is insufficient to overcome the switch resistance, the pressing cam stops rotating and the test driving disk continues to rotate, so that the elastic engaging ball is re-engaged with the deeper spherical slot to obtain a greater driving force, and the spherical slot of appropriate depth is automatically selected for engagement according to the actual resistance characteristics of the power tool switch, thereby realizing automatic adaptation to power tool switches with different resistance characteristics within a predetermined range; when it is detected that the power tool switch is stuck, the piston rod of the engaging pushing cylinder extends downward and acts on the inclined surface of the frustum, pushing the push-pull sleeve to move axially along the drive shaft, so that the test driving disk is disengaged from the pressing cam; Step 3: The power tool that has completed the durability test is transported to the switch dustproof testing area. The sealing push-pull cylinder pushes the connecting plate to drive the surrounding shell to close to form a sealed cavity. A specific concentration of test dust is injected into the sealed cavity. At the same time, the control system drives the power tool switch to perform a preset number of opening and closing cycles. Step 4: The power tool that has completed the dustproof test is transferred to the current flow detection area, where a comprehensive electrical continuity and breaking performance test is performed on the power tool using the voltage detection section, current detection section, resistance detection section, insulation detection section, and temperature detection section. Step 5: Based on the preset judgment criteria, comprehensively evaluate the power tool switch performance and generate a test report.

2. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: The depth gradient design of the spherical slot enables the depth of the spherical slot to gradually change from shallowest to deepest along the rotation direction of the test drive disk, and the difference between the deepest and shallowest depths is adapted to the maximum and minimum resistance values ​​of the power tool switch.

3. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: The electrical continuity test includes: Utilizing the voltage detection unit to detect the working state of the power tool at a specified voltage; Measuring the current value of the power tool during startup and normal operation through the current detection unit; Use the resistance detection unit to measure the resistance value of the internal circuit of the power tool; Utilize the insulation detection unit to detect the insulation resistance value between the power cord and the housing; The temperature detection unit monitors the temperature changes of the power tool during operation.

4. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: The switch batch durability test area is equipped with multiple groups of testing devices, the switch dustproof detection area is equipped with multiple groups of dust testing devices, and the current flow detection area is equipped with multiple groups of electrical parameter detection systems to realize batch testing of power tool switch performance.

5. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: Step 2 of the switch durability test includes a fault response mechanism.

6. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: The method further includes the step of replacing the switch dustproof detection area with a vibration and shock combined test area, wherein the vibration and shock combined test area includes: Multi-axis vibration test system, including horizontal vibration platform and vertical vibration device, can simulate vibration in X, Y and Z directions simultaneously; Shock response test system, including a programmable impactor and a shock response monitoring device; Environmental isolation devices are used to ensure that vibration and shock during testing do not affect other parts of the test system.

7. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 6, characterized in that: The test steps of the vibration and shock combined test area include: Start the multi-axis vibration test system and conduct a full range of vibration tests on the power tool according to the preset vibration spectrum parameters; During vibration, the vibration response characteristics of the power tool switch are monitored through the built-in micro accelerometer; After the vibration test is completed, the impact response test system is started to apply impact forces in different directions to the power tool; After each impact, the system immediately drives the switch to perform opening and closing operations to test the switch's response performance after the impact; Compare the changes in switch performance parameters before and after vibration and before and after impact to evaluate the vibration and impact resistance of the switch structure design.

8. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 6, characterized in that: The test result judgment criteria for the vibration and shock combined test area include: The switch contact resistance change under vibration conditions does not exceed 20% of the initial value; The change in the switch trigger force after impact does not exceed 15% of the initial value; After vibration and shock testing, the switch's electrical on / off function is normal, with no obvious sticking or contact bouncing. There is no obvious looseness or damage to the internal structure of the switch.

9. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 1, characterized in that: A socket is provided in front of the installation position for providing power to the electric tool to detect its power performance.

10. The combined testing method for durability and dustproof electrical performance of power tool switches according to claim 4, characterized in that: The dust testing device includes an air blowing dust collection cabinet, an air blowing pipe and a dust collection pipe, wherein the air blowing pipe is used to inject test dust of a specific concentration into the sealed cavity, and the dust collection pipe is used to recover the dust in the cavity.

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