Batch durability and performance comprehensive testing device for electric tool switches

Abstract

The invention relates to the field of electric tool detection equipment, and discloses an electric tool switch batch durability and performance comprehensive test device which is used for comprehensively detecting the comprehensive performance of an electric tool after a switch durability test. The device comprises a protection frame body, an annular crawler-type detection conveyor belt arranged in the protection frame body and a switch batch test device. An electric tool installation area, a switch batch durability test area, a switch dustproof detection area and a current circulation detection area are sequentially formed on the detection conveying belt in the conveying direction of the detection conveying belt, and a complete test circulation system is formed. The core of the switch batch testing device is a pressing testing structure, and the pressing testing structure comprises a testing driving disc in sliding fit with the driving shaft, a pressing cam matched with the testing driving disc, and an embedding and separating control assembly. According to the device, continuous automatic testing of multiple performances of the electric tool is realized, the testing efficiency and accuracy are greatly improved, and an intelligent solution is provided for production quality control of the electric tool.

Description

Technical Field

[0001] The present invention relates to the field of power tool testing equipment, in particular to a batch durability and performance comprehensive testing device for power tool switches, which is mainly applied to batch quality inspection on a power tool production line, and is particularly suitable for continuous automated testing of the performance, dust-proof performance, and electrical on-off performance of power tool switches. Background Art

[0002] With the wide application of power tools in industrial production and daily life, their reliability and safety have become the focus of user attention. As the core control component of power tools, the performance of power tool switches is directly related to the service life and operation safety of the entire tool. However, there are the following obvious deficiencies in the current power tool performance testing field: First of all, most of the existing testing devices detect only single performance parameters and lack the ability to comprehensively evaluate multiple indicators such as the mechanical performance, dust resistance performance, and electrical on-off performance of power tool switches. This decentralized testing method is not only inefficient but also difficult to comprehensively evaluate the overall performance of power tools in the actual working environment.

[0003] Secondly, traditional testing equipment generally has the problem of insufficient adaptability. Since the switch resistance characteristics of different models of power tools are different, the testing device usually needs to be adjusted or test components replaced according to the specific model, which greatly increases the test preparation time and equipment investment cost, and is particularly unsuitable for the batch inspection requirements on the production line.

[0004] Thirdly, the existing testing systems lack an intelligent mechanism for fault identification and handling. When unqualified products are found during the testing process, they cannot be automatically diverted for processing and often require manual intervention, which affects the overall testing efficiency and resource utilization rate.

[0005] Fourthly, current testing devices rarely can simulate the harsh conditions that power tools may encounter in the actual working environment, such as a high-concentration dust environment. This makes the test results deviate greatly from the actual usage situation and it is difficult to accurately predict the performance of power tools under complex working conditions.

[0006] Fifthly, the existing testing equipment lacks an effective safety protection mechanism. When abnormal situations such as jamming occur in the power tool switch, the testing device is easily damaged, which not only increases the maintenance cost but also prolongs the testing cycle.

[0007] In addition, the fixed device design in traditional testing methods is not reasonable enough and it is difficult to meet the fixing requirements of power tools with different shapes, which affects the stability and accuracy of the testing. Moreover, the testing process usually requires multiple loading and unloading of power tools, with cumbersome operations and low efficiency.

[0008] Finally, the prior art lacks an intelligent determination and timely feedback mechanism for test results, and cannot automatically adjust test parameters according to the actual performance characteristics of power tools, resulting in inaccurate determination criteria and low reliability of test results.

[0009] Therefore, it is necessary to develop a comprehensive performance test device for power tools that can comprehensively test multiple performance indicators of power tools, adapt to different models of power tools, have the ability to identify and handle intelligent faults, simulate the actual working environment, and be safe, reliable and efficient, so as to meet the modernization requirements of power tool production quality control. Summary of the Invention

[0010] In view of the above problems, the present invention provides a batch durability test device for power tool switches, which can realize continuous automatic testing of the durability, dust-proof performance and electrical on-off performance of power tool switches in a single system, greatly improve the test efficiency and accuracy, and can meet the batch detection requirements of various models of power tools.

[0011] One of the invention purposes of the present invention is achieved through the following technical solutions: A batch durability test device for power tool switches includes a protective frame body, a circular tracked detection conveyor belt arranged in the protective frame body, a plurality of power tool mounting positions evenly arranged on the detection conveyor belt, and a switch batch test device for performing batch switch durability tests; the detection conveyor belt sequentially forms a power tool mounting area, a switch batch durability test area, a switch dust-proof detection area, and a current flow detection area along its conveying direction, constituting a complete test cycle system; the switch batch test device includes a drive shaft and a pressing test structure that is slidably matched with the drive shaft through a spline structure, the pressing test structure includes a test driving disk that is slidably matched with the drive shaft through a spline structure, a pressing cam paired with the test driving disk, and an engaging and separating control component for controlling the engagement or separation of the test driving disk and the pressing cam, a plurality of spherical card slots are arranged on the periphery of the test driving disk, two of the spherical card slots on the same diameter line are a group, and gradually deepen along the rotation direction of the test driving disk; the pressing cam is sleeved on the drive shaft and is accurately installed directly above the power tool switch, and two elastic engaging balls are arranged at one end of the pressing cam close to the test driving disk, and the two elastic engaging balls can be engaged with any group of the spherical card slots on the test driving disk.

[0012] Preferably, the chimeric separation control assembly includes a push-pull sleeve connected to the test drive disk by a detachable screw, a self-rotating abutting plate movably sleeved on the drive shaft and directly abutting against one end of the test drive disk, a first chimeric reset spring connecting the self-rotating abutting plate and a fixed sleeve fixedly sleeved on the drive shaft, and a chimeric push cylinder arranged above the frustum portion of the push-pull sleeve; the push-pull sleeve is sleeved on the outer peripheral wall of the fixed sleeve in a sliding fit manner, and the push-pull sleeve includes a frustum portion with the small end facing the test drive disk and an annular portion integrally arranged at one end of the frustum portion away from the test drive disk, and a bearing is arranged between the annular portion and the fixed sleeve.

[0013] Preferably, the switch batch durability test area is equipped with at least one set of pressing and fixing devices, and each pressing and fixing device includes a hinge seat, a pressing component hinged to the hinge seat, and a pressing driving member arranged on the side of the pressing component away from the cover plate and below it; one end of the pressing component is located above the pressing driving member, and the other end is accurately positioned directly above the cover plate; the pressing component includes a hinge rod and a plurality of pressing rods arranged on the side close to the cover plate, and a pressing plate is arranged at the end of each pressing rod; the pressing driving member is a cylinder, and when the piston rod of the cylinder extends upward, the pressing component generates a downward pressure above the cover plate through the lever principle.

[0014] Preferably, the switch dust-proof detection area is equipped with a dust test device, and the dust test device includes a blowing and suction cabinet, a dust removal pipeline assembly, a movable sealing assembly, and a push-pull surrounding assembly; the dust removal pipeline assembly includes a blowing pipeline communicated with the blowing functional part of the blowing and suction cabinet and a suction pipeline communicated with the suction functional part of the blowing and suction cabinet, and the push-pull surrounding assembly is tightly connected with the movable sealing assembly and is used to push the sealing assembly to move to the positions of various power tools; the movable sealing assembly includes a first surrounding shell and a second surrounding shell connected thereto, and the first surrounding shell and the second surrounding shell can form a sealed cavity to surround the power tool therein.

[0015] Another object of the present invention is achieved through the following technical solution: a comprehensive performance test device for power tools, which is different in that the control mode of the pressing test structure uses an electromagnetic control assembly to replace the pneumatic control mode; the electromagnetic control assembly includes an annular electromagnet and a supporting elastic reset mechanism, and the annular electromagnet generates an adsorption force when energized to separate the test drive disk from the pressing cam, and the system automatically resets under the action of elastic force after power-off.

[0016] In summary, the present invention has the following advantages compared with the prior art: Fully integrated comprehensive testing system: The present invention realizes for the first time the integration of the durability test of power tool switches, the dust-proof performance test, and the electrical on-off performance test in a single device, forming a continuous and complete test process, greatly improving the test efficiency, and saving production costs and test time.

[0017] Adaptive testing mechanism: Through multiple groups of spherical card slots with different depths designed on the test drive disc and elastic fitting balls on the pressing cam, automatic adaptive testing of power tools with different switch resistance characteristics is achieved. A single device can simultaneously test switches of multiple models of power tools without the need to replace test equipment or adjust test parameters for each model of power tool, significantly improving the equipment utilization rate.

[0018] Intelligent fault identification and automatic shunt processing: The system is equipped with precise sensors to monitor the motion state of the pressing cam, and can detect performance anomalies of power tool switches in real time. When a faulty product is detected, the system automatically triggers the fitting separation control component, stops the test at the corresponding position, and returns or skips the faulty product for subsequent tests, improving the overall test efficiency.

[0019] Reliable equipment safety protection mechanism: When the fitting separation control component detects jamming of the power tool switch, it can promptly disengage the test drive disc from 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.

[0020] Real environment simulation ability: The dust test device can simulate the dust conditions that power tools may encounter in the actual use environment, and comprehensively evaluate the dust-proof performance of power tool switches. The closed-loop dust test system ensures that dust will not spread in the system, providing a safe and reliable test environment.

[0021] High-efficiency batch processing ability: Through the design of the annular tracked detection conveyor belt, the system realizes the continuous and automatic transportation of power tools. With the setting of multiple test positions, the batch test efficiency is greatly improved.

[0022] Precise fixture design: The pressing and fixing device adopts the lever principle, combined with the elastic structure design of the cover plate, to ensure that the power tool remains stable during the test, improving the accuracy of the test results. The multi-point distributed pressing rods and pressing plates optimize the pressure distribution to ensure uniform and reliable fixing effects.

[0023] Adaptable control mode selection: The system provides two implementation methods: pneumatic control and electromagnetic control, and the appropriate control method can be flexibly selected according to different application environments, enhancing the practicability and adaptability of the device. The pneumatic system is suitable for dust environments and long-term continuous operation, while the electromagnetic system has a faster response, more precise control, and lower noise.

[0024] 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 a comprehensive evaluation of the electrical performance of power tools after dust testing.

[0025] Optimized Spatial Layout Design: In the system layout, the switch dust-proof detection area is specifically set at the annular part of the detection conveyor belt. The maximum distance between adjacent two power tools is utilized to provide sufficient space for the dust testing equipment, avoiding spatial interference with other testing areas.

[0026] In summary, the present invention not only solves the problems of single performance testing, insufficient adaptability, and lack of intelligent fault handling in the prior art, but also provides an efficient, comprehensive, intelligent, and reliable integrated performance testing solution for power tools through mechanical structure design and system integration, providing technical support for quality control in power tool production. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of Embodiment 1; Figure 2 It is a schematic structural diagram of Embodiment 1 excluding the protective housing; Figure 3 It is a schematic structural diagram of the installation position in Embodiment 1; Figure 4 It is a schematic structural diagram of the cooperation between the pressing test structure and part of the drive shaft in Embodiment 1; Figure 5 It is a schematic internal structural diagram when the pressing cam of the pressing test structure in Embodiment 1 is engaged with the test driving disk; Figure 6 It is a schematic internal structural diagram when the pressing cam of the pressing test structure in Embodiment 1 is separated from the test driving disk; Figure 7 For Figure 6 The partial enlarged view at I in Figure 8 It is a schematic structural diagram of the elastic fitting ball in the pressing cam in Embodiment 1; Figure 9 It is a schematic structural diagram of the pressing and fixing device in Embodiment 1; Figure 10 It is a schematic structural diagram of the dust testing device in Embodiment 1; Figure 11 Schematic diagram of the internal structure when the pressing cam of the pressing test structure in Embodiment 2 is engaged with the test driving disk; Figure 12 Schematic diagram of the internal structure when the pressing cam of the pressing test structure in Embodiment 2 is separated from the test driving disk.

[0029] Markings in the figure: power tool 01, power tool installation area 02, switch batch durability test area 03, switch dust-proof detection area 04, current flow detection area 05, protective frame 10, detection conveyor belt 20, installation position 21, socket 22, placement table 211, baffle 212, cover plate 213, placement groove 2111, switch batch test device 30, drive shaft 31, pressing test structure 32, test driving disk 321, pressing cam 322, engagement and separation control component 323, spherical card slot 3211, elastic engagement ball 3221, installation groove 3222, telescopic spring 3223, push-pull sleeve 3231, self-rotating abutting plate 3232, first engagement reset spring 3233, fixed sleeve 3234, engagement push cylinder 3235, frustum portion 3236, annular portion 3237, bearing 40, pressing and fixing device 50, hinge seat 51, pressing component 52, pressing drive member 53, hinge rod 521, pressing rod 522, pressing plate 60, dust test device 70, air blowing and dust suction cabinet 71, dust removal pipeline assembly 72, movable sealing assembly 73, push-pull surrounding assembly 74, air blowing pipeline 721, dust suction pipeline 722, first surrounding housing 731, second surrounding housing 732, bottom plate 741, connecting plate 742, sealing push-pull cylinder 743, electromagnetic control component 80, annular electromagnet 81. Detailed implementation manners

[0030] The present invention will be further described below in conjunction with the embodiments shown in all the drawings: Embodiment 1

[0031] As Figures 1 to 3As shown in the figure, the present invention provides a batch endurance test device for electric tool switches, which is specially designed to comprehensively detect the comprehensive performance of electric tools after switch endurance tests, including switch mechanical performance, dust resistance performance, and electrical on-off performance, etc. The test device mainly consists of a protective frame body 10, and an annular tracked detection conveyor belt 20 is arranged inside the protective frame body 10. Along its conveying direction, the detection conveyor belt 20 is successively formed with an electric tool installation area 02, a switch batch endurance test area 03, a switch dust-proof detection area 04, and a current flow detection area 05, constituting a complete test cycle system. A plurality of installation positions 21 for installing electric tools are evenly arranged on the detection conveyor belt 20, and each installation position 21 includes a placement table 211, baffles 212 located on both sides of the placement table 211, and a cover plate 213 detachably connected to the baffles 212. An installation groove 2111 that fits the lower shape of the electric tool is provided at the upper end of the placement table 211 to stably place different models of electric tools. A socket 22 is arranged in front of each installation position 21 to provide power for the electric tool to detect its power-on performance.

[0032] The electric tool installation area 02 is specifically used for operators to install the electric tools to be tested in the installation groove 2111 and connect the cover plate 213 to the baffles 212 to initially fix the electric tools, preparing for subsequent tests.

[0033] The design of the pressing test structure 32 is one of the core parts of the present invention. It includes a test driving disk 321 that is slidably matched with the driving shaft 31 through a keyway (such as a spline and a spline groove) structure, a pressing cam 322 paired with the test driving disk 321, and an engaging and separating control component 323 that can intelligently control the engagement or separation of the test driving disk 321 and the pressing cam 322. A plurality of spherical card slots 3211 are provided on the periphery of the test driving disk 321. Two of these spherical card slots 3211 on the same diameter line are in a group, and the depths of the same group are the same, and gradually deepen along the rotation direction of the test driving disk 321, forming a depth gradient, so that the same test driving disk 321 is applicable to testing various models of electric tool switches with different switch resistance characteristics.

[0034] The pressing cam 322 is sleeved on the driving shaft 31 in a self-rotating manner and is precisely installed directly above the power tool switch. At one end of the pressing cam 322 close to the test driving disc 321, there are two elastic fitting balls 3221. These two elastic fitting balls 3221 can be fitted and cooperated with any group of spherical card slots 3211 on the test driving disc 321, and automatically select spherical card slots with an appropriate depth for fitting according to the actual resistance characteristics of the power tool switch. The center line of the two elastic fitting balls 3221 is located on the symmetry plane of the pressing cam 322 to ensure the balance of force transmission. The ball diameter of each group of spherical card slots 3211 is precisely matched with the ball diameter of the elastic fitting balls 3221, and the elastic fitting balls 3221 are hemispherical, and the group of spherical card slots 3211 with the deepest depth is also hemispherical to ensure the maximum fitting stability.

[0035] The working principle of the switch testing process is as follows: 1. Normal testing state: When the test driving disc 321 rotates, the spherical card slots 3211 on its periphery are fitted and cooperated with the elastic fitting balls 3221 on the pressing cam 322. Through the contact friction force generated by this fitting, the test driving disc 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 full rotation realizes one complete pressing test cycle. Due to the differences in structural design and used materials of different power tools, their switch resistance characteristics are different. This device can adapt to these differences through the gradient card slot design and realize the simultaneous testing of multiple models of power tools.

[0036] 2. Abnormal state detection mechanism: When the performance of the power tool switch to be tested is normal, the pressing cam 322 can smoothly complete a full rotation with the test driving disc 321; but when the power tool switch is stuck due to reasons such as damaged parts or improper installation, the pressing cam 322 will be stuck and unable to continue rotating.

[0037] 3. Fault response design: In the case of switch jamming, the test driving disc 321 will continue to rotate self-reliantly relative to the stationary pressing cam 322. This design benefits from the compressible characteristics of the elastic fitting balls 3221: when the elastic fitting balls 3221 contact the flat end face (instead of the groove part) of the test driving disc 321, the fitting balls will compress and retract under their own elastic action, thereby allowing the test driving disc 321 to continue rotating when the pressing cam 322 is stationary, realizing fault discrimination.

[0038] The qualified determination standard for the performance of the power tool switch of the present invention has the following working principle: 1. Gradient Embedding Design Principle: The spherical card slots 3211 on the test driving disc 321 are designed in multiple groups with different depths, forming a gradient change. The first group of card slots is designed to be the shallowest, and each subsequent group gradually deepens. This gradient design enables the system to automatically adapt to different switch resistance characteristics and make accurate judgments. The same test driving disc 321 can be applied to test various models of power tool switches with different switch resistance characteristics, without the need to replace the test equipment or adjust the test parameters for each model of power tool, greatly improving the test efficiency and equipment utilization rate.

[0039] 2. Initial Embedding Stage: At the beginning of the test, the elastic embedding ball 3221 first engages with the shallowest first group of spherical card slots 3211. Since the first group of card slots is relatively shallow, when the pressing cam 322 touches the surface of the power tool switch and starts to bear resistance, the embedding friction force provided by the shallow card slots is not sufficient to overcome the switch resistance. At this time, the pressing cam 322 will stop rotating, while the test driving disc 321 continues to rotate driven by the drive shaft 31.

[0040] 3. Automatic Adjustment Mechanism: When the test driving disc 321 continues to rotate while the pressing cam 322 stops, the elastic embedding ball 3221 will compress and retract under its own elasticity and slide out of the first group of card slots. As the test driving disc 321 continues to rotate, the elastic embedding ball 3221 will re-engage with the deeper second group of spherical card slots 3211. Since the second group of card slots is deeper, it provides a greater embedding friction force, which is sufficient to overcome the operating resistance of a normal switch. For power tools with relatively small switch resistance, the shallow card slots can provide sufficient driving force; for power tools with relatively large switch resistance, the elastic embedding ball will automatically find and engage with deeper card slots to obtain a greater driving force. This adaptive mechanism enables a single device to test multiple different models of power tools simultaneously.

[0041] 4. Qualification Judgment Standard: After the elastic embedding ball 3221 successfully engages with the spherical card slots 3211 of an appropriate depth, if the power tool switch being tested has normal performance, the pressing cam 322 will be able to complete at least one full rotation under the drive of this embedding friction force, realizing a complete switch pressing action. The system determines that such a switch has qualified performance.

[0042] 5. Fault Identification Mechanism: However, if there is a jam or other fault in the power tool switch, resulting in an abnormally large switch resistance, even the maximum embedding friction force provided by the deepest spherical card slots 3211 cannot drive the pressing cam 322 to complete a full rotation. At this time, the test driving disc 321 will rotate relative to the pressing cam 322 again, and the system determines that the switch has a performance fault.

[0043] 6. Realization of Cyclic Testing: After the qualification 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.

[0044] To achieve automatic determination, this system is equipped with precise sensors to monitor the motion state of the pressing cam 322. These sensors can detect the rotational displacement of the pressing cam 322 in real time, record its motion trajectory and distance change curve. When the sensors detect that the pressing cam 322 has completed a predetermined rotational angle within the test cycle, the system automatically determines it as qualified; conversely, if the sensors do not detect the expected motion of the pressing cam 322 after the drive shaft 31 has completed a rotation cycle, the system determines it as faulty.

[0045] This adaptive testing method based on gradient chimerism can accurately simulate actual operating conditions, automatically adjust the testing force according to the actual performance characteristics of the switch, ensure the accuracy and consistency of the determination results, and effectively distinguish between normal and abnormal switch performance states. At the same time, this design concept of "one machine with multiple functions" enables a single testing device to adapt to and test electric tool switches with multiple different resistance characteristics simultaneously, greatly improving the versatility, efficiency, and equipment utilization rate of batch testing.

[0046] The chimerism separation control component 323 is the core control mechanism of the present invention and is designed to have two key functions: First, when the electric tool switch gets stuck during the test, it can promptly disengage the test drive disk 321 from the pressing cam 322 to prevent damage to the test mechanism; Second, after a set of tests is completed, it can automatically control the system to reset, making each component return to the initial position state to prepare for the next round of testing. This design not only ensures the safe operation of the testing equipment but also improves the automation level and efficiency of the testing.

[0047] The chimerism separation control component 323 mainly includes the following key components: Push-pull sleeve 3231: Connected to the test drive disk 321 by a detachable screw for transmitting motion; Self-rotating abutment plate 3232: Actively sleeved on the drive shaft 31, with one end directly abutting against the test drive disk 321; First chimerism return spring 3233: Connecting the self-rotating abutment plate 3232 and the fixed sleeve 3234 to provide a restoring force; Fixed sleeve 3234: Firmly sleeved on the drive shaft 31 as the basic support for the entire component; Chimerism push cylinder 3235: Arranged above the frustum portion 3236 to provide a control force; Frustum portion 3236: As a special design part of the push-pull sleeve 3231, with the small end facing the test drive disk 321; Annular portion 3237: Integrally provided with the end of the frustum portion 3236 away from the test drive disk 321; High-precision bearing 40: Installed between the annular portion 3237 and the fixed sleeve 3234.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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: 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.

[0053] 2. Automatic position alignment: The pressing cam 322 is installed on the drive shaft 31 in a self-rotating socket manner. When there is no external force, it naturally adjusts the cam part to a specific position by its own gravity. At the same time, the test driving disk 321 ensures that the position of the spherical card slot 3211 with the minimum depth on it corresponds precisely to the position of the elastic engaging ball 3221 on the pressing cam 322 through the precise angle control of the test motor.

[0054] 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 accurately and automatically engage with the spherical card slot 3211 with the minimum depth on the test driving disk 321, thus establishing a stable initial test state.

[0055] This design not only simplifies the reset process without 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.

[0056] To ensure the stability and accuracy of the operation of the entire mechanism, the engaging and separating control component 323 also adopts a number of structural optimization measures: 1. Bearing design: A bearing 40 is installed between the annular part 3237 and the fixed sleeve 3234, adopting a special fitting method: the bearing 40 is in a tight fit with the annular part 3237, while it has a clearance fit with the fixed sleeve 3234.

[0057] 2. Differential fitting: This differential fitting design enables the bearing 40 to move together with the annular part of 3237 and at the same time maintain the ability to slide on the fixed sleeve 3234, effectively reducing the frictional resistance.

[0058] These optimized designs ensure that the axial movement of the push-pull sleeve 3231 driven by the cylinder is both stable and precise, providing an important mechanical guarantee for the reliable operation of the entire engaging and separating mechanism.

[0059] Refer to Figures 1 - 3 and Figure 9 As shown, to ensure that the power tool remains stable during the switch test and improve the accuracy of the test results, the switch batch durability test area 03 is equipped with multiple groups of pressing and fixing devices 50 that cleverly utilize the lever principle. The cover plate 213 adopts an elastic structure design with a slightly upward convex middle part. When subjected to pressure, it can produce an appropriate elastic deformation, so as to closely fit the surface of the power tool and achieve firm fixation.

[0060] The structure of the pressing and fixing device 50 mainly includes three parts: 1. Hinge seat 51: As the fulcrum basis of the entire device; 2. Pressing component 52: Hinged to the hinge seat 51 to form the main part of the lever; 3. Pressing driving member 53: It is arranged on the side of the pressing assembly 52 away from the cover plate 213 and below it to provide driving force. One end of the pressing assembly 52 is located above the acting point of the pressing driving member 53, and the other end is accurately positioned directly above the cover plate 213. In this embodiment, the pressing driving member 53 adopts a cylinder structure. When its piston rod extends upward, according to the lever principle, a downward pressure is generated at the end of the pressing assembly 52 above the cover plate 213, thereby achieving reliable pressing of the cover plate 213.

[0061] The detailed structure of the pressing assembly 52 includes a hinged rod 521 and multiple pressing rods 522 arranged on its side close to the cover plate 213. The system is configured with three groups of pressing and fixing devices 50, and each group of devices is equipped with four pressing rods 522. This distribution optimizes the pressure distribution and ensures uniform and reliable fixing effects. To further improve the pressing effect, a special pressing plate 60 is assembled at the end of each pressing rod 522, increasing the contact area with the cover plate 213 and ensuring uniform and stable pressure distribution.

[0062] During the actual working process, the pressing and fixing device 50 first acts to complete the fixing of the power tool, and then the switch batch testing device 30 is started for subsequent switch performance testing. The two processes are closely connected to form a complete testing process.

[0063] When there are both faulty products and qualified products among the power tools subjected to batch detection, the system adopts a differential processing strategy: for the faulty products with unqualified switch tests, the system first identifies and marks them through sensors, and then transmits the fault signal to the fitting and separation control component 323 to control the action of the fitting and pushing cylinder 3235 at the corresponding position, so that the test driving disk 321 at this position is separated from the pressing cam 322, stopping the further testing of the faulty products. Subsequently, the system returns the faulty products to the power tool installation area 02 for removal, preventing them from entering the subsequent dust test and power-on test links, or skipping the tests in the subsequent test links, thereby improving the overall testing efficiency and saving resources.

[0064] At the same time, for the qualified products, the system sequentially conveys them to the next station area (switch dust-proof detection area 04) through the detection conveyor belt 20 to continue the subsequent testing process. When all the qualified products have completed the movement, the system will trigger the fitting and separation control component 323 to temporarily separate the spherical card slots 3211 at each test position from the elastic fitting balls 3221, preparing for loading a new batch of power tools to be tested and starting a new round of batch endurance testing.

[0065] This intelligent shunt mechanism ensures that faulty products can be screened out in a timely manner, avoiding ineffective tests, and at the same time ensuring the continuity and efficiency of the testing process for qualified products.

[0066] Refer toFigures 1 - 2 , Figure 10 As shown, the present invention sets the switch dust-proof detection area 04 before the current flow detection area 05. This design ensures that the electric tool can complete an effective dust test before the electrical performance test, so as to comprehensively evaluate the switch performance of the electric tool in a dust environment. The location selection of the switch dust-proof detection area 04 is particularly crucial: it is located in the annular part of the detection conveyor belt 20, and this area has obvious spatial advantages. The distance between adjacent two electric tools reaches the maximum value, providing sufficient space for the installation of the dust test equipment. This layout not only facilitates the arrangement and operation of the dust removal equipment, but also effectively avoids spatial interference with the equipment in the aforementioned switch batch durability test area 03, realizes the clear separation of functional areas, and prevents dust from spreading to other test areas. In this embodiment, this area is configured with 4 installation positions 21, forming an efficient batch processing capacity.

[0067] The switch dust-proof detection area 04 is equipped with a specially designed dust test device 70, which consists of four main parts: a blowing and suction cabinet 71, multiple groups of dust removal pipeline components 72, multiple groups of movable sealing components 73, and a push-pull enclosure component 74. This system can simulate various dust conditions that the electric tool may encounter in the actual use environment, so as to comprehensively evaluate the dust-proof performance of the electric tool switch. Among them, the number of the dust removal pipeline components 72 and the movable sealing components 73 strictly corresponds to the installation positions 21 one by one, ensuring that each electric tool can receive the same quality of dust test. The push-pull enclosure component 74 is closely connected to multiple groups of movable sealing components 73 and is designed to synchronously push the sealing components to accurately move to the positions of each electric tool to form an effective sealed enclosure. To adapt to the dynamic requirements of the system, the dust removal pipeline components 72 adopt a telescopic hose design, with one end connected to the blowing and suction cabinet 71 and the other end passing through the push-pull enclosure component 74 and connected to the movable sealing component 73 to form a complete dust test path.

[0068] The blowing and suction cabinet 71 is internally designed with a blowing part and a suction part with independent functions. Although its internal structure is not shown in detail in the figure, this dual-function design forms an efficient air flow circulation system. Each group of dust removal pipeline components 72 includes two pipelines with different functions: a blowing pipeline 721 connected to the blowing functional part, which is used to blow dust with a specific particle size into the sealed cavity; a suction pipeline 722 connected to the suction functional part, which is used to recover dust after the test. They jointly constitute a closed-loop dust test system to ensure that dust will not spread in the system.

[0069] The structure of the push-pull enclosure assembly 74 includes a base plate 741 provided with precision slide rails and two connecting plates 742 slidably connected to the base plate. These two connecting plates are respectively located on both sides of the power tool, and each connecting plate is equipped with a dedicated sealed push-pull cylinder 743 for driving the movement of the sealing assembly. The movable sealing assembly 73 is ingeniously arranged between the two connecting plates 742 and consists of two parts: a first enclosure housing 731 connected to one side connecting plate and a second enclosure housing 732 connected to the other side connecting plate. When the sealed push-pull cylinders 743 on both sides work simultaneously and respectively push the two enclosure housings to move to the mating position, they form a completely enclosed sealed cavity, completely surrounding the power tool and creating an ideal environment for dust testing.

[0070] The working process of the dust testing device 70 is efficient and precise: First, the sealed push-pull cylinders 743 synchronously push the two connecting plates 742 to move along the slide rails of the base plate 741 towards the power tool. The connecting plates then drive the first enclosure housing 731 and the second enclosure housing 732 to be accurately positioned and closed, completely sealing and surrounding the power tool. During this process, the blowing pipeline 721 and the dust suction pipeline 722 extend synchronously to adapt to the distance change. After the sealing is completed, the blowing and dust suction cabinet 71 starts to work, injecting test dust with a specific concentration into the sealed cavity through the blowing pipeline 721. At the same time, the control system drives the power tool switch to perform an opening and closing cycle operation according to a preset program, simulating the actual use scenario of the power tool in a dust environment. After the test is completed, the dust suction pipeline 722 recovers all the dust in the cavity, and then the system evaluates the dust-proof performance of the power tool. This designed dust testing process ensures that the dust-proof performance of the power tool switch is comprehensively evaluated, providing a reliable guarantee for product quality.

[0071] To further comprehensively detect the power-on performance of the power tool and ensure product quality, the present invention sets up a current flow detection area 05 after the dust test. The current flow detection area 05 is equipped with a complete electrical parameter detection system, including a voltage detection part for detecting voltage, a current detection part for detecting current, a resistance detection part for detecting resistance, an insulation detection part for detecting the insulation resistance between the power supply line and the housing, and a temperature detection part for detecting the operating temperature of the power tool. These detections can 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.

[0072] To optimize the overall structural rationality and safety of the testing equipment of the present invention, the present invention also sets up various auxiliary structures, such as various types of plate racks, frames, bosses, etc., for functions such as component connection, strengthening connection strength, shielding and protection. These belong to conventional technical means and will not be elaborated one by one in this embodiment.

[0073] Embodiment 2 Refer to Figures 11 - 12As shown, the main difference between Embodiment 2 and Embodiment 1 lies in the control method of the pressing test structure 32, where the pneumatic control method is replaced by an electromagnetic control component 80.

[0074] The electromagnetic control component 80 mainly consists of an annular electromagnet 81 and a supporting elastic reset mechanism. During operation, when the annular electromagnet 81 is energized, it generates an adsorption force to separate the test driving disk 321 from the pressing cam 322; after power-off, the system automatically resets under the action of elastic force. This electromagnetic control method has the advantages of faster response, more precise control, and lower noise compared with pneumatic control.

[0075] However, the electromagnetic control method also has obvious limitations: firstly, the electromagnet generates high heat during long-term operation, which may cause thermal deformation of components and affect the test accuracy; secondly, the reliability of electromagnetic control is relatively low in a high-dust environment, and the electromagnetic coil is easily contaminated by dust and affects its lifespan; in addition, electromagnetic control has high requirements for power quality, and its stability is inferior to that of the pneumatic system in a power fluctuation environment. The pneumatic control system of Embodiment 1 has significant advantages such as good heat dissipation, resistance to dust pollution, and strong adaptability to harsh working conditions, and is particularly suitable for long-term continuous test scenarios in industrial production environments.

[0076] Although the test principles of the two implementation methods are the same, both adopt an embedding and separation mechanism to ensure the efficiency and reliability of the test system, but the appropriate control method can be flexibly selected according to different application environments, enhancing the practicability and adaptability of the present invention.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric tool switch batch endurance test device, characterized in that, Comprising: A drive shaft, connected to a test motor and passing through the switch batch durability test area; Multiple groups of pressing test structures, coaxially cooperating with the drive shaft, and each group of pressing test structures corresponds to a power tool to be tested; The pressing test structure includes: a test driving disc, slidably cooperating with the drive shaft through a keyway structure, and multiple groups of spherical card slots are provided on its periphery. The spherical card slots gradually deepen along the rotation direction of the test driving disc, forming a depth gradient, so that the same test driving disc is applicable to testing switches of multiple models of power tools with different switch resistance characteristics; a pressing cam, rotatably sleeved on the drive shaft, and an elastic fitting ball is provided at one end close to the test driving disc. The elastic fitting ball can be fitted with any group of spherical card slots on the test driving disc, and automatically selects a spherical card slot with an appropriate depth for fitting according to the actual resistance characteristics of the power tool switch; Wherein, during the test, when the power tool switch performs normally, the elastic fitting ball is fitted with a spherical card slot with an appropriate depth, so that the pressing cam completes a full rotation; when the power tool switch gets stuck, the test driving disc continues to rotate while the pressing cam stops, and the elastic fitting ball disengages from the spherical card slot.

2. The electric tool switch batch durability test device according to claim 1, wherein It further includes a fitting and separating control component for controlling the fitting or separation of the test driving disc and the pressing cam. The fitting and separating control component includes: a push-pull sleeve, connected to the test driving disc by a detachable screw; a self-rotating abutting plate, movably sleeved on the drive shaft, and one end directly abuts against the test driving disc; a first fitting and reset spring, connecting the self-rotating abutting plate and a fixed sleeve; the fixed sleeve, sleeved on the drive shaft; a frustum portion, as a part of the push-pull sleeve, with the small end facing the test driving disc; a fitting and pushing cylinder, arranged above the frustum portion; Wherein, when the power tool switch gets stuck, the fitting and pushing cylinder is triggered to work, and the piston rod extends to act on the frustum portion, pushing the test driving disc to move axially along the drive shaft and disengage from the pressing cam, preventing damage to the test mechanism; when the test is completed or the test state needs to be reset, the fitting and pushing cylinder retracts, and the first fitting and reset spring releases energy to push the test driving disc to reset, so that the elastic fitting ball is refitted with the spherical card slot, automatically restoring to the initial test state.

3. The batch durability test device for the electric tool switch according to claim 1, wherein Two spherical card slots on the same diameter line are in a group, and the depths of the same group are the same.

4. The batch durability test device for the power tool switch according to claim 1, characterized in that The center line of the elastic fitting ball is located on the symmetry plane of the pressing cam.

5. The electric tool switch batch durability test device according to claim 1, wherein The elastic fitting ball is hemispherical.

6. The batch durability test device for the electric tool switch according to claim 1, characterized in that, It further includes a pressing and fixing device, and the pressing and fixing device includes: a hinge seat; a pressing component, hinged to the hinge seat; a pressing driving member, arranged on the side of the pressing component away from the cover plate and below it.

7. The electric tool switch batch durability test device according to claim 6, characterized in that The pressing component includes a hinge rod and multiple pressing rods arranged on the side of the hinge rod close to the cover plate. A pressing plate is assembled at the end of each pressing rod.

8. An integrated performance testing device for power tools, characterized in that, Comprising: A protective frame; A detection conveyor belt, arranged inside the protective frame and having an annular track structure; The detection conveyor belt sequentially forms a power tool installation area, a switch batch durability test area, a switch dust prevention detection area, and a current flow detection area along its conveying direction, forming a closed-loop continuous test system; A plurality of mounting positions for installing power tools are uniformly arranged on the detection conveyor belt; The switch batch durability test area is provided with a power tool switch batch durability test device as described in claim 1, and the switch batch durability test device is used to simultaneously press the switches of a plurality of power tools; The switch dust-proof detection area is arranged at the position with the largest arc of the circular part of the detection conveyor belt, so that the distance between adjacent two power tools reaches the maximum value; The switch dust-proof detection area is located before the current flow detection area; The switch dust-proof detection area is provided with a dust test device; The current flow detection area is provided with an electrical parameter detection system.

9. The comprehensive performance testing device for power tools according to claim 8, characterized in that, The mounting position includes a placement table, baffles on both sides of the placement table, and a cover plate detachably connected to the baffles. An placement groove matching the lower shape of the power tool is provided at the upper end of the placement table.

10. The comprehensive performance testing device for power tools according to claim 8, characterized in that, The dust test device includes: A blowing and suction cabinet; Multiple groups of dust removal pipeline components, and the number of the dust removal pipeline components corresponds to the mounting positions one by one; Multiple groups of movable sealing components, and the number of the movable sealing components corresponds to the mounting positions one by one; A push-pull surrounding component, connected to the multiple groups of movable sealing components.

11. The comprehensive performance testing device for power tools according to claim 8, characterized in that, The electrical parameter detection system includes a voltage detection part, a current detection part, a resistance detection part, an insulation detection part, and a temperature detection part.

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