Electric tool switch batch durability and performance comprehensive testing device

Abstract

The present invention relates to the field of electric tool testing equipment, and discloses an electric tool switch batch durability and performance comprehensive testing device, which is used to comprehensively test the comprehensive performance of the electric tool after the switch durability test. The device includes a protective frame, an annular crawler-type detection conveyor belt arranged in the protective frame, and a switch batch testing device. The detection conveyor belt forms an electric tool installation area, a switch batch durability test area, a switch dustproof detection area and a current flow detection area in sequence along its transmission direction, forming a complete test cycle system. The core of the switch batch testing device is a press test structure, which includes a test drive disk that slides with the drive shaft, a press cam paired with the test drive disk, and an engaging and separating control component. The device realizes continuous automated testing of multiple performances of the electric tool, greatly improves the test efficiency and accuracy, and provides an intelligent solution for the production quality control of electric tools.

Description

Technical Field

[0001] The present invention relates to the field of electric tool testing equipment, and in particular to a batch durability and comprehensive performance testing device for electric tool switches. The device is mainly used for batch quality testing on electric tool production lines, and is particularly suitable for continuous automated testing of electric tool switch performance, dustproof performance, and electrical on / off performance. Background Art

[0002] With the widespread use of power tools in industrial production and daily life, their reliability and safety have become a key concern for users. As the core control component, the performance of the power tool switch is directly related to the service life and operational safety of the entire tool. However, the current field of power tool performance testing has the following obvious shortcomings:

[0003] First, existing testing devices mostly focus on a single performance parameter and lack the ability to comprehensively assess multiple indicators, including the mechanical properties, dust resistance, and electrical switching performance of power tool switches. This decentralized testing approach is not only inefficient but also makes it difficult to fully evaluate the overall performance of power tools in actual working environments.

[0004] Secondly, traditional testing equipment generally suffers from a lack of adaptability. Because the switching resistance characteristics of different power tool models vary, test equipment often requires targeted adjustments or replacement of test components based on the specific model. This significantly increases test preparation time and equipment investment costs, making it particularly unsuitable for batch testing on production lines.

[0005] Third, existing test systems lack intelligent mechanisms for fault identification and handling. When substandard products are discovered during testing, they are not automatically diverted and handled, often requiring manual intervention, impacting overall test efficiency and resource utilization.

[0006] Fourth, current testing equipment rarely simulates the harsh conditions power tools may encounter in real-world environments, such as high-concentration dust. This can lead to significant discrepancies between test results and actual usage, making it difficult to accurately predict power tool performance under complex operating conditions.

[0007] Fifth, existing testing equipment lacks an effective safety protection mechanism. When abnormal conditions such as the power tool switch getting stuck occur, the testing device is easily damaged, which not only increases maintenance costs but also prolongs the testing cycle.

[0008] Furthermore, the fixture design used in traditional testing methods is not rational, making it difficult to adapt to the different shapes of power tools, affecting the stability and accuracy of the test. Furthermore, the testing process often requires multiple installation and removal of the power tool, which is cumbersome and inefficient.

[0009] Finally, the existing technology lacks an intelligent judgment and timely feedback mechanism for test results, and is unable to automatically adjust test parameters according to the actual performance characteristics of the power tool, resulting in inaccurate judgment criteria and low reliability of test results.

[0010] Therefore, it is necessary to develop a comprehensive performance testing device that can comprehensively test multiple performance indicators of power tools, adapt to different models of power tools, have intelligent fault identification and processing capabilities, simulate the actual working environment, and be safe, reliable and efficient to meet the modern needs of power tool production quality control. Summary of the Invention

[0011] In response to the above-mentioned problems, the present invention provides a batch durability testing device for electric tool switches. The device can realize continuous and automated testing of the durability, dustproof performance and electrical switching performance of electric tool switches in a single system, greatly improving the testing efficiency and accuracy, and can adapt to the batch testing needs of various models of electric tools.

[0012] One of the inventive objectives of the present invention is achieved through the following technical solutions: a batch durability test device for electric tool switches, comprising a protective frame, an annular crawler-type detection conveyor belt arranged in the protective frame, a plurality of electric tool installation positions evenly arranged on the detection conveyor belt, and a switch batch testing device for performing batch switch durability testing; the detection conveyor belt is sequentially formed with an electric tool installation area, a switch batch durability testing area, a switch dustproof detection area, and a current flow detection area along its conveying direction, forming a complete test cycle system; the switch batch testing device includes a drive shaft and a press test structure that slides with the drive shaft through a spline structure, and the press test structure The structure includes a test driving disk that slides with the driving shaft through a spline structure, a pressing cam paired with the test driving disk, and an engagement and separation control component that controls the engagement or disengagement of the test driving disk and the pressing cam. The periphery of the test driving disk is provided with multiple groups of spherical slots, and the spherical slots are two in a group on the same diameter line, and gradually deepen along the rotation direction of the test driving disk; the pressing cam is sleeved on the driving shaft and precisely installed directly above the power tool switch, and the pressing cam is provided with two elastic engaging balls at one end close to the test driving disk, and the two elastic engaging balls can be engaged with any group of the spherical slots on the test driving disk.

[0013] Preferably, the engaging and separating control assembly includes a push-pull sleeve connected to the test driving disk by a detachable screw, a self-rotating abutment plate movably sleeved on the driving shaft and directly abutting the test driving disk at one end, a first engaging reset spring connecting the self-rotating abutment plate and a fixed sleeve fixedly sleeved on the driving shaft, and an engaging pushing cylinder arranged above the conical portion of the push-pull sleeve; the push-pull sleeve is slidably fitted on the outer circumferential wall of the fixed sleeve and the push-pull sleeve includes a conical portion with its small end facing the test driving disk and an annular portion integrally arranged with the conical portion at one end away from the test driving disk, and a bearing is arranged between the annular portion and the fixed sleeve.

[0014] Preferably, the switch batch durability test area is equipped with at least one set of clamping and fixing devices, which include a hinged seat, a pressing assembly hinged to the hinged seat, and a clamping drive member arranged on the side of the pressing assembly away from the cover plate and located below it; one end of the pressing assembly is located above the clamping drive member, and the other end is precisely located directly above the cover plate; the pressing assembly includes a hinged rod and multiple pressing rods arranged on its side close to the cover plate, and a pressing plate is provided at the end of each pressing rod; the clamping drive member is a cylinder, and when the piston rod of the cylinder extends upward, the pressing assembly generates downward pressure above the cover plate through the lever principle.

[0015] Preferably, the switch dustproof detection area is equipped with a dust testing device, which includes an air blowing dust collection cabinet, a dust removal duct assembly, a movable sealing assembly and a push-pull enclosure assembly; the dust removal duct assembly includes an air blowing duct connected to the air blowing function part of the air blowing dust collection cabinet and a dust suction duct connected to the dust suction function part of the air blowing dust collection cabinet, the push-pull enclosure assembly is tightly connected to the movable sealing assembly and is used to push the sealing assembly to move to each power tool position; the movable sealing assembly includes a first enclosure shell and a second enclosure shell connected thereto, the first enclosure shell and the second enclosure shell can form a sealed cavity to enclose the power tool.

[0016] Another inventive object of the present invention is achieved through the following technical solution: a comprehensive testing device for the performance of an electric tool, the difference being that the control method of the press test structure adopts an electromagnetic control component instead of a pneumatic control method; the electromagnetic control component includes an annular electromagnet and a matching elastic reset mechanism, and the annular electromagnet generates an adsorption force when energized to separate the test drive disk from the press cam, and the system automatically resets under the action of the elastic force after power is cut off.

[0017] In summary, the present invention has the following advantages compared with the prior art:

[0018] Fully integrated comprehensive testing system: This invention is the first to integrate the power tool switch durability test, dustproof performance test and electrical continuity performance test into a single device, forming a continuous and complete testing process, greatly improving testing efficiency, saving production costs and testing time.

[0019] Adaptive testing mechanism: By utilizing multiple sets of spherical slots of varying depths on the test drive and the elastically engaged balls on the pressure cam, the system automatically adapts to the needs of power tools with varying switch resistance characteristics. A single device can simultaneously test multiple power tool switch models, eliminating the need to change test equipment or adjust test parameters for each model, significantly improving equipment utilization.

[0020] Intelligent Fault Identification and Automatic Triage: The system is equipped with precision sensors that monitor the motion of the press cam, enabling real-time detection of power tool switch anomalies. When a faulty product is detected, the system automatically triggers the mating / separation control assembly, halting testing at the corresponding location and either sending the faulty product back or skipping subsequent testing, improving overall testing efficiency.

[0021] Reliable equipment safety protection mechanism: When the engagement and separation control component detects that the power tool switch is stuck, it can promptly disengage the test drive disc and the pressing cam to prevent damage to the test mechanism. At the same time, after the test is completed, it can automatically reset the system to prepare for the next round of testing.

[0022] Real-world environment simulation capability: The dust test device can simulate the dust conditions that power tools may encounter in actual use, comprehensively evaluating the dust resistance performance of power tool switches. The closed-loop dust test system ensures that dust does not spread within the system, providing a safe and reliable testing environment.

[0023] Efficient batch processing capability: Through the design of an endless crawler-type inspection conveyor, the system realizes the continuous automatic transportation of power tools. Combined with the setting of multiple test positions, it greatly improves the efficiency of batch testing.

[0024] Precise Fixture Design: The lever-based clamping mechanism, combined with the elastic structure of the cover, ensures the power tool remains secure during testing, improving the accuracy of test results. Multi-point pressure rods and plates optimize pressure distribution, ensuring uniform and reliable fixation.

[0025] Adaptable control options: The system offers both pneumatic and electromagnetic control, allowing flexible selection of the appropriate control method based on the application environment, enhancing the device's practicality and adaptability. Pneumatic systems are suitable for dusty environments and long-term continuous operation, while electromagnetic systems offer faster response, more precise control, and lower noise.

[0026] Complete electrical parameter detection system: The current flow detection area is equipped with a comprehensive electrical parameter detection system, including voltage, current, resistance, insulation and temperature detection, to ensure that the electrical performance of the power tool is fully evaluated after the dust test.

[0027] Optimized spatial layout design: The system layout specifically places the switch dust detection area in the ring part of the detection conveyor belt, utilizing the maximum distance between two adjacent power tools to provide sufficient space for the dust testing equipment, avoiding spatial interference with other test areas.

[0028] In summary, the present invention not only solves the problems of single performance testing, insufficient adaptability, and lack of intelligent fault handling in the existing technology, but also provides an efficient, comprehensive, intelligent and reliable power tool performance comprehensive testing solution through mechanical structure design and system integration, providing technical support for quality control of power tool production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 This is a schematic structural diagram of Example 1;

[0031] Figure 2 This is a schematic diagram of the structure of Example 1 without the protective housing;

[0032] Figure 3 This is a schematic diagram of the structure of the installation position in Example 1;

[0033] Figure 4 This is a schematic diagram of the structure of the press test structure and part of the drive shaft in Example 1;

[0034] Figure 5 Schematic diagram of the internal structure of the test press structure in Example 1 when the pressing cam and the test drive disk are engaged;

[0035] Figure 6 Schematic diagram of the internal structure of the press test structure in Example 1 when the press cam and the test driving plate are separated;

[0036] Figure 7 for Figure 6 A partial enlarged view of point Ⅰ in the middle;

[0037] Figure 8 Schematic diagram of the structure of the elastic embedded ball in the pressing cam in Example 1;

[0038] Figure 9 Schematic diagram of the structure of the pressing and fixing device in Example 1;

[0039] Figure 10 Schematic diagram of the structure of the dust testing device in Example 1;

[0040] Figure 11 Schematic diagram of the internal structure of the press test structure in Example 2 when the press cam and the test driving disk are engaged;

[0041] Figure 12 This is a schematic diagram of the internal structure of the press test structure in Example 2 when the press cam and the test driving plate are separated.

[0042] 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, 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 card slot 3211, elastic engagement ball 3221, installation slot 3222, telescopic spring 3223, push-pull sleeve 3231, self-rotating plate 3232, first engagement Return spring 3233, fixed sleeve 3234, interlocking pushing cylinder 3235, frustum portion 3236, annular portion 3237, bearing 40, clamping and fixing device 50, hinged seat 51, pressing assembly 52, clamping drive 53, hinged rod 521, pressing rod 522, pressing plate 60, dust testing device 70, air blowing and dust collection cabinet 71, dust removal duct assembly 72, movable sealing assembly 73, push-pull enclosure assembly 74, air blowing duct 721, dust collection duct 722, first enclosure shell 731, second enclosure shell 732, bottom plate 741, connecting plate 742, sealed push-pull cylinder 743, electromagnetic control assembly 80, annular electromagnet 81. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the embodiments shown in all the accompanying drawings:

[0044] Example 1

[0045] like Figures 1 to 3As shown, the present invention provides a batch durability testing device for power tool switches. This device is specifically designed to comprehensively test the comprehensive performance of power tools after switch durability testing, including switch mechanical performance, dust resistance, and electrical switching performance. The testing device is mainly composed of a protective frame 10, within which is disposed an endless crawler-type testing conveyor belt 20. Along its conveying direction, the testing conveyor belt 20 is sequentially formed with a power tool installation area 02, a batch switch durability testing area 03, a switch dustproof testing area 04, and a current flow testing area 05, forming a complete testing cycle system. The testing conveyor belt 20 is evenly distributed with multiple mounting positions 21 for mounting power tools. Each mounting position 21 includes a mounting platform 211, baffles 212 located on both sides of the mounting platform 211, and a cover plate 213 detachably connected to the baffle 212. The upper end of the mounting platform 211 is provided with a mounting groove 2111 that matches the shape of the lower portion 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 electric tool to detect its power performance.

[0046] The power tool installation area 02 is specifically used for operators to install the power tool to be tested in the installation groove 2111 and connect the cover plate 213 to the baffle 212 to preliminarily fix the power tool in preparation for subsequent testing.

[0047] The design of the press test structure 32 is one of the core parts of the present invention. It includes a test drive disk 321 that is slidably engaged with the drive shaft 31 through a keyway (such as a spline and spline groove) structure, a press cam 322 paired with the test drive disk 321, and an engagement and separation control component 323 that can intelligently control the engagement or disengagement of the test drive disk 321 and the press cam 322. The periphery of the test drive disk 321 is provided with multiple groups of spherical slots 3211. These spherical slots 3211 are grouped together with two on the same diameter line. The depth of each group is the same and gradually deepens along the rotation direction of the test drive disk 321, forming a depth gradient. This makes the same test drive disk 321 suitable for testing multiple models of power tool switches with different switch resistance characteristics.

[0048] The pressing cam 322 is rotatably sleeved on the drive shaft 31 and precisely mounted just above the power tool switch. The pressing cam 322 is provided with two elastic interlocking balls 3221 at one end close to the test drive disk 321. These two elastic interlocking balls 3221 can be interlocked with any set of spherical slots 3211 on the test drive disk 321, and automatically select spherical slots of appropriate depth for interlocking according to the actual resistance characteristics of the power tool switch. The center lines of the two elastic interlocking balls 3221 are located on the symmetry plane of the pressing cam 322 to ensure the balance of force transmission. The ball diameter of each set of spherical slots 3211 precisely matches the ball diameter of the elastic interlocking balls 3221, and the elastic interlocking balls 3221 are hemispherical. The deepest set of spherical slots 3211 is also hemispherical to ensure maximum interlocking stability.

[0049] The switch testing process works as follows:

[0050] 1. Normal test state: When the test drive disk 321 rotates, the spherical slot 3211 on its periphery engages with the elastic interlocking ball 3221 on the pressing cam 322. Through the contact friction generated by this engagement, the test drive disk 321 drives the pressing cam 322 to rotate together, so that the pressing cam 322 can perform a pressing action on the power tool switch. Completing one rotation means completing a complete pressing test cycle. Different power tools have different switch resistance characteristics due to differences in structural design and materials used. This device can adapt to these differences through the gradient slot design, realizing simultaneous testing of multiple models of power tools.

[0051] 2. Abnormal state detection mechanism: When the performance of the power tool switch under test is normal, the pressing cam 322 can smoothly complete a full rotation along with the test drive disk 321; however, when the power tool switch becomes stuck due to parts damage or improper installation, the pressing cam 322 will be stuck and cannot continue to rotate.

[0052] 3. Fault Response Design: In the event of a stuck switch, the test drive disc 321 will continue to rotate relative to the stationary pressing cam 322. This design benefits from the compressible nature of the elastic interlocking ball 3221: when the elastic interlocking ball 3221 contacts the flat end surface (not the groove) of the test drive disc 321, the interlocking ball compresses and retracts under its own elastic force, allowing the test drive disc 321 to continue rotating while the pressing cam 322 is stationary, thus achieving fault identification.

[0053] The working principle of the power tool switch performance qualification judgment standard of the present invention is as follows:

[0054] 1. Gradient Engagement Design Principle: The spherical slots 3211 on the test drive plate 321 are designed with multiple groups of varying depths, creating a gradient. The first group of slots is the shallowest, while subsequent groups gradually deepen. This gradient design enables the system to automatically adapt to different switch resistance characteristics and make accurate judgments. The same test drive plate 321 can be used to test multiple models of power tool switches with different switch resistance characteristics, eliminating the need to replace test equipment or adjust test parameters for each power tool model, greatly improving testing efficiency and equipment utilization.

[0055] 2. Initial engagement phase: At the start of the test, the elastic engagement balls 3221 first engage with the shallowest first set of spherical grooves 3211. Because the first set of grooves is shallow, when the pressing cam 322 contacts the surface of the power tool switch and begins to experience resistance, the friction provided by the shallow grooves is insufficient to overcome the switch resistance. At this point, the pressing cam 322 stops rotating, while the test drive plate 321 continues to rotate, driven by the drive shaft 31.

[0056] 3. Automatic adjustment mechanism: When the test drive disk 321 continues to rotate and the pressing cam 322 stops, the elastic interlocking ball 3221 will be compressed and retracted under its own elastic action and slide out of the first set of slots. As the test drive disk 321 continues to rotate, the elastic interlocking ball 3221 will re-engage with the deeper second set of spherical slots 3211. Because the second set of slots is deeper, it provides greater interlocking friction, which is sufficient to overcome the operational resistance of normal switches. For power tools with less switching resistance, shallow slots can provide sufficient driving force; for power tools with greater switching resistance, the elastic interlocking ball will automatically find and engage with the deeper slots to obtain greater driving force. This adaptive mechanism enables a single device to test multiple different models of power tools at the same time.

[0057] 4. Acceptance Criteria: When the elastic engaging ball 3221 is successfully engaged with the spherical engaging groove 3211 of appropriate depth, and the power tool switch under test performs normally, the pressing cam 322 will be able to complete at least one full rotation driven by the friction force of this engagement, achieving a complete switch pressing action. The system determines that such a switch performs well.

[0058] 5. Fault Identification Mechanism: However, if the power tool switch is stuck or otherwise faulty, resulting in abnormally high switching resistance, even the maximum friction provided by the deepest spherical groove 3211 will not be able to drive the pressing cam 322 to complete a full rotation. At this point, the test drive plate 321 will rotate relative to the pressing cam 322 again, and the system will determine that the switch has a performance fault.

[0059] 6. Cyclic test implementation: After passing the judgment, the system repeats the above test process according to the preset program, performs a predetermined number of switch durability tests, and comprehensively evaluates the reliability and service life of the switch.

[0060] To enable automated testing, the system is equipped with precision sensors to monitor the motion of the pressing cam 322. These sensors detect the rotational displacement of the pressing cam 322 in real time, recording its motion trajectory and distance curve. If the sensors detect that the pressing cam 322 completes the predetermined rotation angle within the test cycle, the system automatically determines that the test is qualified. Conversely, if the sensors do not detect the expected movement of the pressing cam 322 after the drive shaft 31 completes its rotation cycle, the system determines that the test is faulty.

[0061] This adaptive test method, based on gradient intercalation, accurately simulates actual operating conditions and automatically adjusts test force based on the actual performance characteristics of the switch, ensuring accurate and consistent results and effectively distinguishing between normal and abnormal switch performance states. Furthermore, this "one device, multiple uses" design concept enables a single test device to simultaneously adapt and test a variety of power tool switches with different resistance characteristics, significantly improving the versatility, efficiency, and equipment utilization of batch testing.

[0062] The engagement and disengagement control assembly 323 is the core control mechanism of this invention. Its design serves two key functions: First, if the power tool switch becomes stuck during testing, it can promptly disengage the test drive plate 321 from the pressing cam 322, preventing damage to the test mechanism. Second, after completing a set of tests, it can automatically reset the system, returning all components to their initial positions and preparing for the next round of testing. This design not only ensures the safe operation of the test equipment, but also improves the automation and efficiency of testing.

[0063] The interlocking separation control assembly 323 mainly includes the following key components: 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 reset 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 assembly; an interlocking push cylinder 3235: arranged above the conical portion 3236 to provide control force; the conical portion 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 end of the conical portion 3236 away from the test drive disk 321; a high-precision bearing 40: installed between the annular portion 3237 and the fixed sleeve 3234.

[0064] In this system, the fixed sleeve 3234 is securely attached to the drive shaft 31, serving as the foundational support for the entire assembly. The push-pull sleeve 3231 is slidably fitted onto the outer circumference of the fixed sleeve 3234, allowing it to slide freely along the axial direction of the drive shaft 31. The self-rotating abutment plate 3232 is flexibly attached to the drive shaft 31 and mounted within the push-pull sleeve 3231. One end of the abutment plate directly abuts the test drive disc 321, ensuring effective force transmission. The smaller end of the truncated cone 3236 faces the test drive disc 321, forming a surface that receives the cylinder's force.

[0065] In this system, the first nested return spring 3233 and the elastic nested ball 3221 work in tandem, each with its own specific focus: the first nested return spring 3233 primarily controls the system's axial reset, while the elastic nested ball 3221 handles radial force transmission and fine-tuning. The elastic forces of both can be adjusted to suit the switching characteristics of different power tool models, ensuring the test system can adapt to various switching resistance characteristics.

[0066] By replacing the first locking return spring 3233 with one of varying stiffness coefficients, the sensitivity of the system's separation and reset response can be adjusted. The elastic locking ball 3221 can precisely control its locking strength with the spherical retaining groove 3211 by adjusting its material hardness or pre-compression. This adjustability allows the system to flexibly meet diverse testing requirements while maintaining high accuracy and reliability.

[0067] When the power tool switch is detected to be stuck during the test, the interlocking push cylinder 3235 is triggered to work. Its piston rod extends downward and acts on the inclined surface of the truncated cone 3236. Due to the guiding effect of the inclined surface, the push-pull sleeve 3231 will move axially away from the pressing cam 322 along the drive shaft 31, while driving the test drive disk 321 connected to it to move together. During this movement, the first interlocking reset spring 3233 is compressed to store energy. This design can quickly separate the test drive disk 321 and the pressing cam 322 at a critical moment to avoid damage to the equipment.

[0068] When the test is completed or the test status needs to be reset, the system's automatic reset mechanism comes into play. This mechanism relies on the following elements to work together:

[0069] 1. Mechanical reset: When the piston rod of the interlocking push cylinder 3235 moves upward and breaks away from the contact with the truncated cone 3236, the compressed first interlocking reset spring 3233 releases the stored energy, pushing the self-rotating plate 3232, thereby driving the push-pull sleeve 3231 and the test drive disk 321 to move toward the direction of the pressing cam 322.

[0070] 2. Automatic position alignment: The pressing cam 322 is installed on the drive shaft 31 by a self-rotating sleeve connection. When there is no external force, the cam part is naturally adjusted to a specific position by its own gravity; at the same time, the test driving disk 321 is precisely controlled by the test motor to ensure that the position of the spherical groove 3211 with the smallest depth on it accurately corresponds to the position of the elastic embedded ball 3221 on the pressing cam 322.

[0071] 3. Re-engagement: The above two characteristics cooperate with each other so that when the spring rebounds, the elastic engaging ball 3221 on the pressing cam 322 can be accurately and automatically engaged with the spherical slot 3211 with the minimum depth on the test driving disk 321, thereby establishing a stable initial test state.

[0072] This design not only simplifies the reset process and eliminates the need for an additional positioning mechanism, but also effectively ensures the consistency and repeatability of each test, greatly improving the reliability of the test results.

[0073] To ensure the stability and accuracy of the entire mechanism, the chimeric separation control assembly 323 also adopts a number of structural optimization measures:

[0074] 1. Bearing design: A bearing 40 is installed between the annular portion 3237 and the fixed sleeve 3234 , using a special fit: the bearing 40 is tightly fitted with the annular portion 3237 , while being loosely fitted with the fixed sleeve 3234 .

[0075] 2. Differentiated fit: This differentiated fit design enables the bearing 40 to move with the annular portion 3237 while maintaining the ability to slide on the fixed sleeve 3234, effectively reducing frictional resistance.

[0076] These optimized designs ensure that the axial movement of the push-pull sleeve 3231 driven by the cylinder is both smooth and precise, providing important mechanical guarantees for the reliable operation of the entire engaging and separating mechanism.

[0077] Reference Figure 1-Figure 3 and Figure 9 As shown, to ensure the power tool remains stable and immobile during switch testing and improve the accuracy of test results, the switch batch durability test area 03 is equipped with multiple sets of clamping and fixing devices 50 that cleverly utilize the principle of leverage. The cover plate 213 adopts an elastic structure design with a slightly upward convex center. When subjected to pressure, it can produce moderate elastic deformation, tightly fitting the power tool surface and achieving a secure fixation.

[0078] The structure of the pressing and fixing device 50 mainly includes three parts:

[0079] 1. Articulated seat 51: serves as the fulcrum of the entire device;

[0080] 2. Pressing assembly 52: hinged to the hinge seat 51, forming the main part of the lever;

[0081] 3. The pressing drive member 53 is located on the side of the pressing assembly 52 away from the cover 213 and below it to provide driving force;

[0082] One end of the pressing assembly 52 is located above the point of action of the pressing driver 53, and the other end is precisely positioned directly above the cover plate 213. In this embodiment, the pressing driver 53 is a cylinder structure. When its piston rod extends upward, the lever principle is used to generate downward pressure on the end of the pressing assembly 52 above the cover plate 213, thereby reliably pressing the cover plate 213.

[0083] The detailed structure of the pressing assembly 52 includes a hinged rod 521 and multiple pressing rods 522 positioned near the cover plate 213. This system utilizes three sets of clamping and fixing devices 50, each equipped with four pressing rods 522. This arrangement optimizes pressure distribution and ensures uniform and reliable fixing. To further enhance the clamping effect, a dedicated pressing plate 60 is attached to the end of each pressing rod 522, increasing the contact area with the cover plate 213 and ensuring uniform and stable pressure distribution.

[0084] In actual working process, the pressing and fixing device 50 is first actuated to complete the fixing of the electric tool, and then the switch batch testing device 30 is activated to perform subsequent switch performance testing. The two processes are closely connected to form a complete testing process.

[0085] When a batch of power tools undergoing testing includes both faulty and qualified products, the system employs a differentiated processing strategy: For faulty products that fail the switch test, the system first identifies and marks them via sensors. It then transmits the fault signal to the engagement and separation control assembly 323, which activates the engagement cylinder 3235 at the corresponding position, disengaging the test drive disc 321 from the pressing cam 322, halting further testing of the faulty product. The system then transports the faulty product back to the power tool installation area 02 for removal, preventing it from undergoing subsequent dust and power-on tests. Alternatively, the system skips the test in subsequent testing steps, improving overall testing efficiency and conserving resources.

[0086] Meanwhile, the system sequentially transports qualified products via inspection conveyor 20 to the next workstation (switch dustproof inspection area 04) for continued testing. Once all qualified products have completed their movement, the system triggers the engagement and separation control assembly 323, temporarily disengaging the ball retaining grooves 3211 and elastic engagement balls 3221 at each test station, preparing for the loading of a new batch of power tools and the start of a new round of batch endurance testing.

[0087] This intelligent diversion mechanism ensures that faulty products can be screened out in a timely manner to avoid invalid testing, while ensuring the continuity and efficiency of the testing process for qualified products.

[0088] Reference Figure 1-Figure 2 、 Figure 10 As shown, the present invention sets the switch dustproof detection area 04 before the current flow detection area 05. This design ensures that the power tool can complete an effective dust test before conducting an electrical performance test, thereby comprehensively evaluating the switch performance of the power tool in a dusty environment. The selection of the location of the switch dustproof detection area 04 is particularly critical: it is located in the annular part of the detection conveyor belt 20. This area has obvious spatial advantages. The distance between two adjacent power tools reaches the maximum value, providing sufficient space for the installation of dust testing equipment. This layout not only facilitates the arrangement and operation of dust removal equipment, but also effectively avoids spatial interference with the equipment in the aforementioned switch batch durability test area 03, realizes a clear separation of functional areas, and prevents dust from spreading to other test areas. In this embodiment, the area is configured with 4 mounting positions 21, forming an efficient batch processing capability.

[0089] The switch dust protection testing area 04 is equipped with a specially designed dust testing device 70, consisting of four main components: an air-blowing dust collection cabinet 71, multiple dust removal duct assemblies 72, multiple sets of movable seal assemblies 73, and a push-pull enclosure assembly 74. This system simulates the various dust conditions that power tools may encounter in real-world use, thereby comprehensively evaluating the dust protection performance of power tool switches. The number of dust removal duct assemblies 72 and movable seal assemblies 73 corresponds exactly to the number of mounting locations 21, ensuring that each power tool receives the same quality of dust testing. The push-pull enclosure assembly 74 is tightly connected to the multiple sets of movable seal assemblies 73 and is designed to synchronously push the seal assemblies precisely to each power tool position, forming an effective seal enclosure. To accommodate the dynamic needs of the system, the dust removal duct assembly 72 utilizes a retractable hose design. One end connects to the air-blowing dust collection cabinet 71, and the other end passes through the push-pull enclosure assembly 74 and connects to the movable seal assemblies 73, forming a complete dust testing path.

[0090] The interior of the air blowing and dust collection cabinet 71 is designed with independent functions of blowing and dust collection. Although the internal structure is not shown in detail, this dual-function design forms a highly efficient air circulation system. Each dust removal duct assembly 72 includes two pipes with different functions: an air blowing duct 721 connected to the air blowing unit is used to blow dust of a specific particle size into the sealed cavity; and a dust collection duct 722 connected to the dust collection unit is used to recover dust after the test is completed. Together, they form a closed-loop dust testing system, ensuring that dust does not spread within the system.

[0091] The structure of the push-pull enclosure assembly 74 includes a base plate 741 provided with a precision slide rail and two connecting plates 742 slidably connected to the base plate. The two connecting plates are located on both sides of the power tool, and each connecting plate is equipped with a dedicated sealing push-pull cylinder 743 for driving the movement of the sealing assembly. The movable sealing assembly 73 is cleverly arranged between the two connecting plates 742 and consists of two parts: a first enclosure shell 731 connected to the connecting plate on one side and a second enclosure shell 732 connected to the connecting plate on the other side. When the sealing push-pull cylinders 743 on both sides work simultaneously and push the two enclosure shells to the mating position, they form a completely enclosed sealed cavity that completely surrounds the power tool, creating an ideal environment for dust testing.

[0092] The working process of the dust testing device 70 is efficient and precise: first, the sealing push-pull cylinder 743 synchronously pushes the two connecting plates 742 along the slide rail of the bottom plate 741 toward the power tool. The connecting plates then drive the first enclosing shell 731 and the second enclosing shell 732 to accurately position and close, completely sealing and surrounding the power tool. During this process, the air blowing duct 721 and the dust suction duct 722 extend synchronously to adapt to the change in distance. When the sealing is completed, the air blowing and dust suction cabinet 71 starts working, injecting a specific concentration of test dust into the sealed cavity through the air blowing duct 721. At the same time, the control system drives the power tool switch to perform an open and close cycle according to a preset program, simulating the actual use scenario of the power tool in a dusty environment. After the test is completed, the dust suction duct 722 recovers all the dust in the cavity, and then the system evaluates the dustproof performance of the power tool. This designed dust testing process ensures that the dustproof performance of the power tool switch is fully evaluated, providing a reliable guarantee for product quality.

[0093] To further comprehensively test the power tool's electrical performance and ensure product quality, the present invention incorporates a current flow detection area 05 after the dust test. This area is equipped with a complete electrical parameter detection system, including a voltage detection unit for voltage, a current detection unit for current, a resistance detection unit for resistance, an insulation detection unit for the insulation resistance between the power cord and the housing, and a temperature detection unit for the power tool's operating temperature. These tests comprehensively assess the power tool's electrical performance after the dust test, ensuring the product maintains excellent electrical safety and functional stability in dusty environments.

[0094] In order to optimize the overall structural rationality and safety of the testing equipment of the present invention, the present invention also provides a variety of auxiliary structures, such as various types of plate racks, frames, bosses, etc., which are used for component connection, strengthening connection strength, shielding and protection, etc. These are conventional technical means and will not be described in detail in this embodiment.

[0095] Example 2

[0096] Reference Figure 11-12 As shown, the main difference between Example 2 and Example 1 lies in the control method of the press test structure 32, in which an electromagnetic control component 80 is used instead of a pneumatic control method.

[0097] The electromagnetic control assembly 80 primarily consists of a ring-shaped electromagnet 81 and a supporting elastic reset mechanism. During operation, the ring-shaped electromagnet 81 generates an attractive force, separating the test drive plate 321 from the pressing cam 322. Upon power failure, the system automatically resets under the action of the elastic force. This electromagnetic control method offers advantages over pneumatic control, including faster response, more precise control, and lower noise.

[0098] However, electromagnetic control also has significant limitations: First, prolonged operation of the electromagnet generates high heat, which can cause thermal deformation of components and affect test accuracy. Second, electromagnetic control is relatively unreliable in high-dust environments, and the electromagnetic coil is easily affected by dust contamination, which affects its lifespan. Furthermore, electromagnetic control requires high power quality and is less stable than pneumatic systems in fluctuating power conditions. The pneumatic control system of Example 1, on the other hand, has significant advantages such as good heat dissipation, resistance to dust contamination, and strong adaptability to harsh operating conditions, making it particularly suitable for long-term continuous testing scenarios in industrial production environments.

[0099] Although the testing principles of the two implementations remain consistent and both adopt a chimeric separation mechanism to ensure the efficiency and reliability of the testing system, suitable control methods can be flexibly selected for different application environments, thereby enhancing the practicality and adaptability of the present invention.

[0100] 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 batch durability testing device for power tool switches, characterized in that: include: A drive shaft connected to the test motor and passing through the switch batch durability test area; Multiple groups of press test structures are coaxially matched with the drive shaft, and each group of press test structures corresponds to a power tool to be tested; The press test structure includes: a test drive disk, which is slidably engaged with the drive shaft via a keyway structure, and has a plurality of spherical slots on its periphery. The spherical slots gradually deepen along the rotation direction of the test drive disk to form a depth gradient, so that the same test drive disk can be used to test multiple models of power tool switches with different switch resistance characteristics; The pressing cam is rotatably sleeved on the driving shaft, and an elastic fitting ball is provided at one end close to the test driving disk. The elastic fitting ball can fit into any set of spherical slots on the test driving disk, and automatically selects a spherical slot of appropriate depth for fitting according to the actual resistance characteristics of the power tool switch; The engaging and separating control assembly is used to control the engaging and disengaging of the test driving disk and the pressing cam, and the engaging and separating control assembly includes: a push-pull sleeve connected to the test driving disk by a detachable screw; a self-rotating abutment plate movably sleeved on the driving shaft, one end of which directly abuts the test driving disk; a first engaging reset spring connecting the self-rotating abutment plate and the fixed sleeve; a fixed sleeve sleeved on the driving shaft; a frustum portion as a part of the push-pull sleeve, the small end of which faces the test driving disk; and an engaging pushing cylinder arranged above the frustum portion. Among them, during the test process, when the performance of the power tool switch is normal, the elastic interlocking ball is engaged with the spherical slot of appropriate depth, so that the pressing cam completes a full circle of rotation; when the power tool switch is stuck, the test drive disk continues to rotate and the pressing cam stops, and the elastic interlocking ball disengages from the spherical slot; when the power tool switch is seriously stuck, the interlocking push cylinder is triggered to work, and the piston rod extends to act on the frustum, pushing the test drive disk to move axially along the drive shaft and disengage from the pressing cam to prevent damage to the test mechanism; when the test is completed or the test state needs to be reset, the interlocking push cylinder retracts, and the first interlocking reset spring releases energy to push the test drive disk to reset, so that the elastic interlocking ball is re-engaged with the spherical slot and automatically returns to the initial test state.

2. The electric tool switch batch durability testing device according to claim 1, characterized in that: The two spherical slots on the same diameter line form a group, and the depths of the same group are the same.

3. The electric tool switch batch durability testing device according to claim 1, characterized in that: The center line of the elastic embedded ball is located on the symmetry plane of the pressing cam.

4. The electric tool switch batch durability testing device according to claim 1, characterized in that: The elastic interlocking ball is hemispherical.

5. The electric tool switch batch durability testing device according to claim 1, characterized in that: It also includes a clamping and fixing device, which includes: a hinged seat; a pressing component hinged to the hinged seat; and a clamping drive member arranged on the side of the pressing component away from the cover plate and below it.

6. The electric tool switch batch durability testing device according to claim 5, characterized in that: The pressing assembly comprises a hinged rod and a plurality of pressing rods arranged on a side of the hinged rod close to the cover plate, and a pressing plate is assembled at the end of each pressing rod.

7. A comprehensive testing device for electric tool performance, characterized in that: include: Protection frame; A detection conveyor belt is arranged inside the protection frame and has an annular crawler structure; The detection conveyor belt is sequentially formed with an electric tool installation area, a switch batch durability test area, a switch dustproof detection area, and a current flow detection area along its conveying direction, forming a closed-loop continuous testing system; A plurality of installation positions for installing electric tools are evenly arranged on the detection conveyor belt; The switch batch durability test area is provided with an electric tool switch batch durability test device as claimed in claim 1, which is used to press the switches of multiple electric tools at the same time; The switch dustproof detection area is arranged at the point where the arc of the annular part of the detection conveyor belt is the largest, so that the distance between two adjacent electric tools reaches the maximum value, providing sufficient operating space for the dust testing equipment, and preventing dust from spreading to other test areas; The switch dustproof detection area is located before the current flow detection area to ensure that the electric tool completes an effective dust test before conducting an electrical performance test, so as to comprehensively evaluate the switch performance of the electric tool in a dusty environment; The switch dustproof detection area is provided with a dust testing device; The current flow detection area is provided with an electrical parameter detection system.

8. The comprehensive testing device for electric tool performance according to claim 7, characterized in that: The installation position includes a placement platform, baffles located on both sides of the placement platform, and a cover detachably connected to the baffles. The upper end of the placement platform is provided with a placement groove that matches the shape of the lower part of the power tool.

9. The power tool performance comprehensive testing device according to claim 7, characterized in that: The dust testing device includes: an air blowing dust collection cabinet; multiple groups of dust removal duct assemblies, the number of the dust removal duct assemblies corresponds one-to-one to the installation positions; multiple groups of movable sealing assemblies, the number of the movable sealing assemblies corresponds one-to-one to the installation positions; a push-pull enclosure assembly, connected to the multiple groups of movable sealing assemblies.

10. The power tool performance comprehensive testing device according to claim 7, characterized in that: The electrical parameter detection system includes a voltage detection unit, a current detection unit, a resistance detection unit, an insulation detection unit, and a temperature detection unit.

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