A PTC thermistor ceramic resistor detection device

Abstract

A PTC thermistor ceramic resistance testing device includes an insulating base, a gantry frame, a transverse module, a lifting module, an insulating adsorption block, and a thermistor ceramic conveyor line. Unlike the traditional method of testing thermistor ceramic sheets one by one, this invention can batch-grab and test multiple sheets at the same time. The probe is placed in the negative pressure suction nozzle, adsorbing the thermistor ceramic sheet. At the same time, the upper probe moves down and abuts the upper end face of the thermistor ceramic sheet due to the negative pressure overcoming the spring force. As long as the thermistor ceramic sheet can be successfully adsorbed, there is no need to adjust its position and angle. This eliminates the need for centrifugal sieving and arranging of the thermistor ceramic sheets, and the contact between the upper probe and the thermistor ceramic sheet can be achieved. Then, the slide cylinder moves it to the top of the lower probe, and the three-axis cylinder pushes down the insulating adsorption block adsorbing the thermistor ceramic sheet until the lower probe abuts the lower end face of the thermistor ceramic sheet, forming an electrical circuit to measure the current and calculate the resistance value.

Description

Technical Field

[0001] This utility model relates to the field of electrical engineering, and more particularly to thermistor ceramic detection technology, especially a PTC thermistor ceramic resistance detection device. Background Technology

[0002] PTC thermistor ceramics, also known as positive temperature coefficient ceramics, are a type of electronic ceramic. At room temperature, their resistance is very low. However, when the temperature rises to near or above their specific Curie temperature, their resistivity increases dramatically by several orders of magnitude within a relatively narrow temperature range, returning to its original state when the temperature drops. After PTC thermistor ceramic sheets are manufactured, their resistance needs to be tested to eliminate defective products. In existing technology, resistance testing equipment applies a voltage to both ends of the ceramic sheet to form an electrical circuit, measures the current, and then calculates the resistance value. However, only one PTC thermistor ceramic sheet can be tested at a time, thus requiring a sampling inspection method, resulting in many defective products going undetected. Utility Model Content

[0003] The purpose of this invention is to provide a PTC thermistor ceramic resistance testing device. Unlike traditional one-by-one testing, this invention can batch-grab and test multiple ceramic sheets simultaneously. The probe is placed inside the negative pressure suction nozzle, adsorbing the thermistor ceramic sheet. At the same time, the upper probe moves down and abuts the upper end face of the thermistor ceramic sheet due to the negative pressure overcoming the spring force. As long as the thermistor ceramic sheet can be successfully adsorbed, no additional adjustment of its position and angle is required to achieve contact between the upper probe and the thermistor ceramic sheet. Then, the slide cylinder moves it to the top of the lower probe, and the three-axis cylinder pushes down the insulating adsorption block adsorbing the thermistor ceramic sheet until the lower probe abuts the lower end face of the thermistor ceramic sheet, forming an electrical circuit to measure the current and calculate the resistance value.

[0004] To achieve the above objectives, this utility model provides a PTC thermistor ceramic resistance testing device, which includes an insulating base, a gantry frame, a transverse module, a lifting module, an insulating adsorption block, a thermistor ceramic conveyor line, and a resistance tester.

[0005] A row of lower probes is provided on the upper surface of the insulating base, and the gantry frame is erected on the insulating base; the transverse module includes two symmetrically arranged slide cylinders, which are horizontally installed on the side wall of the gantry frame, and a synchronization plate is connected between the sliders of the two slide cylinders; the lifting module includes two three-axis cylinders, which are respectively installed at both ends of the synchronization plate, and the piston rod ends of the two three-axis cylinders are connected to the upper surface of the insulating adsorption block;

[0006] The insulating adsorption block has a row of through holes longitudinally. Each through hole has an enlarged upper section to form a probe insertion hole, the diameter of which is larger than the diameter of the through hole. Each through hole also has an enlarged lower section to form a suction nozzle hole, the diameter of which is larger than the diameter of the through hole. Each suction nozzle hole contains a negative pressure suction nozzle. Each probe insertion hole contains a spring and a polyethylene cylinder. The spring is clamped between the bottom of the polyethylene cylinder and the bottom of the probe insertion hole. An upper probe is inserted along the axis of the polyethylene cylinder, its lower end extending to the suction opening of the negative pressure suction nozzle, and its lower end retracting into the nozzle opening. The insulating adsorption block also has a row of negative pressure holes transversely, the inner ends of which communicate with the through holes.

[0007] The thermosensitive ceramic conveyor line is located below the insulating adsorption block and is used to convey the thermosensitive ceramic sheet.

[0008] The upper probe and the lower probe are respectively connected to the resistance tester via wires.

[0009] Furthermore, the present invention provides a PTC thermistor ceramic resistor detection device, wherein the outer end of the negative pressure hole is provided with an internal thread, and each outer end of the negative pressure hole is connected to a quick-connect air pipe connector through the thread.

[0010] Furthermore, the present invention provides a PTC thermistor ceramic resistor detection device, wherein the upper probe and the polyethylene cylinder are interference-fitted.

[0011] Furthermore, the present invention provides a PTC thermistor ceramic resistor detection device, wherein the polyethylene cylinder and the probe insertion hole are fitted with a clearance.

[0012] Furthermore, this utility model provides a PTC thermistor ceramic resistor testing device, wherein structural adhesive is provided at the gap between the negative pressure suction nozzle and the edge of the suction nozzle hole.

[0013] This invention has the following advantages over the prior art:

[0014] On the one hand, unlike traditional one-by-one testing, this utility model can batch grab and test multiple pieces at the same time. The probe is placed in the negative pressure nozzle, adsorbing the thermistor ceramic sheet. At the same time, the upper probe moves down and abuts the upper end face of the thermistor ceramic sheet due to the negative pressure. As long as the thermistor ceramic sheet can be successfully adsorbed, there is no need to adjust its position and angle. The contact between the upper probe and the thermistor ceramic sheet can be achieved. This eliminates the centrifugal sieving and arranging process of the thermistor ceramic sheet. Then, the slide cylinder carries it to the top of the lower probe. The three-axis cylinder pushes down the insulating adsorption block adsorbing the thermistor ceramic sheet until the lower probe abuts the lower end face of the thermistor ceramic sheet, forming an electrical circuit to measure the current and calculate the resistance value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a PTC thermistor ceramic resistor detection device according to the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure with changing perspective;

[0017] Figure 3 This is an exploded view of the insulating adsorption block structure in a PTC thermistor ceramic resistor testing device according to this utility model;

[0018] Figure 4 for Figure 3 Schematic diagram of the structure with changing perspective;

[0019] Figure 5 This is a schematic diagram of the cross-section of the insulating adsorption block in a PTC thermistor ceramic resistor testing device according to the present invention.

[0020] The components include: 1. Insulating base; 2. Gantry frame; 3. Insulating adsorption block; 4. Thermosensitive ceramic conveyor line; 5. Lower probe; 6. Slide cylinder; 7. Synchronization plate; 8. Triaxial cylinder; 9. Through hole; 10. Probe insertion hole; 11. Suction nozzle hole; 12. Negative pressure suction nozzle; 13. Spring; 14. Polyethylene cylinder; 15. Upper probe; 16. Negative pressure hole; 17. Quick-connect air hose. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1-5 As shown, this embodiment provides a PTC thermistor ceramic resistance testing device, which includes an insulating base 1, a gantry frame 2, a transverse module, a lifting module, an insulating adsorption block 3, a thermistor ceramic conveyor line 4, and a resistance tester (not shown in the figure).

[0025] The upper surface of the insulating base 1 is provided with a row of lower probes 5, and the gantry frame 2 is erected on the insulating base 1; the transverse module includes two symmetrically arranged sliding cylinders 6, which are horizontally installed on the side wall of the gantry frame 2, and a synchronization plate 7 is connected between the sliders of the two sliding cylinders 6; the lifting module includes two three-axis cylinders 8, which are respectively installed at both ends of the synchronization plate 7, and the piston rod ends of the two three-axis cylinders 8 are connected to the upper surface of the insulating adsorption block 3.

[0026] The insulating adsorption block 3 has a row of through holes 9 longitudinally. Each through hole 9 has an enlarged upper section to form a probe insertion hole 10, the diameter of which is larger than the diameter of the through hole 9. Each through hole 9 has an enlarged lower section to form a suction nozzle hole 11, the diameter of which is larger than the diameter of the through hole 9. Each suction nozzle hole 11 contains a negative pressure suction nozzle 12. Structural adhesive is applied to the gap between the negative pressure suction nozzle 12 and the suction nozzle hole 11. Each probe insertion hole 10 contains a spring 13 and a polyethylene cylinder 14, with a clearance fit between the polyethylene cylinder 14 and the probe insertion hole 10. The spring 13 is clamped between the bottom of the polyethylene cylinder 14 and the bottom of the probe insertion hole 10. An upper probe 15 is inserted along the axial direction of the polyethylene cylinder 14. The upper probe 15 and the polyethylene cylinder 14 are interference-fitted. The lower end of the upper probe 15 extends to the mouth of the negative pressure suction nozzle 12. The lower end of the upper probe 15 is recessed into the mouth of the suction nozzle. A row of negative pressure holes 16 is opened horizontally on the insulating adsorption block 3. The inner end of the negative pressure hole 16 is connected to the through hole 9. The outer end of the negative pressure hole 16 is provided with an internal thread. A quick-connect duct connector 17 is tightened to the outer end of each negative pressure hole 16.

[0027] The thermal ceramic conveying line 4 is located below the insulating adsorption block 3 and is used to convey thermal ceramic sheets.

[0028] The upper probe 15 and the lower probe 5 are respectively connected to the resistance tester via wires.

[0029] The working process and principle of a PTC thermistor ceramic resistance testing device in this embodiment are as follows: The thermistor ceramic sheet is conveyed to the bottom of the insulating adsorption block 3 via the thermistor ceramic conveyor line 4. Each quick-connect pipe 17 is connected to an external negative pressure generator through pipelines. The triaxial cylinder 8 pushes the insulating adsorption block 3 downward until the negative pressure suction nozzle 12 contacts the thermistor ceramic sheet. While the thermistor ceramic sheet is adsorbed, the negative pressure pulls the polyethylene cylinder 14 to overcome the force of the spring 13. The upper probe 15 installed on the polyethylene cylinder 14 moves downward a certain distance. After moving to the bottom, the upper probe 15 just touches the upper end face of the thermistor ceramic sheet. The triaxial cylinder 8 drives the insulating adsorption block 3 upward, and the slide cylinder 6 drives the synchronous plate 7 to retreat. After retreating to the bottom, the upper probe 15 is just above the lower probe 5. At this time, the triaxial cylinder 8 pushes the insulating adsorption block 3 downward again until the lower end face of the thermistor ceramic sheet contacts the lower probe 5. After forming an electrical circuit, the resistance tester measures the current and calculates the resistance value.

[0030] The parts of this utility model not described in detail include the resistance tester, which are all technologies known to those skilled in the art.

[0031] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A PTC thermistor ceramic resistor detection device, characterized in that, Includes an insulating base (1), a gantry frame (2), a transverse module, a lifting module, an insulating adsorption block (3), a thermistor ceramic conveyor line (4), and a resistance tester; The upper surface of the insulating base (1) is provided with a row of lower probes (5), and the gantry frame (2) is erected on the insulating base (1); the transverse module includes two symmetrically arranged slide cylinders (6), the two slide cylinders (6) are installed laterally on the side wall of the gantry frame (2), and a synchronization plate (7) is connected between the sliders of the two slide cylinders (6); the lifting module includes two three-axis cylinders (8), the two three-axis cylinders (8) are respectively installed at both ends of the synchronization plate (7), and the piston rod ends of the two three-axis cylinders (8) are connected to the upper surface of the insulating adsorption block (3); The insulating adsorption block (3) has a row of through holes (9) longitudinally. The upper part of each through hole (9) is enlarged to form a probe insertion hole (10), the diameter of which is larger than that of the through hole (9). The lower part of each through hole (9) is enlarged to form a suction nozzle hole (11), the diameter of which is larger than that of the through hole (9). Each suction nozzle hole (11) is fitted with a negative pressure suction nozzle (12). Each probe insertion hole (10) is fitted with a spring (13) and a pressure device. An ethylene cylinder (14) is provided, with the spring (13) clamped between the bottom of the polyethylene cylinder (14) and the bottom of the probe insertion hole (10). An upper probe (15) is inserted along the axial direction of the polyethylene cylinder (14), with the lower end of the upper probe (15) extending to the mouth of the negative pressure suction nozzle (12), and the lower end of the upper probe (15) retracting into the mouth of the suction nozzle. The insulating adsorption block (3) has a row of negative pressure holes (16) opened laterally, and the inner end of the negative pressure holes (16) is connected to the through hole (9). The thermal ceramic conveying line (4) is located below the insulating adsorption block (3) and is used to convey the upper probe (15) and lower probe (5) of the thermal ceramic sheet to the resistance tester via wires.

2. The PTC thermistor ceramic resistor detection device according to claim 1, characterized in that, The negative pressure hole (16) is provided with an internal thread at its outer end, and each of the negative pressure holes (16) is connected to a quick-connect ventilator (17) by the thread at its outer end.

3. The PTC thermistor ceramic resistor detection device according to claim 1, characterized in that, The upper probe (15) and the polyethylene cylinder (14) are interference-fitted.

4. The PTC thermistor ceramic resistor detection device according to claim 1, characterized in that, The polyethylene cylinder (14) and the probe insertion hole are fitted with a clearance.

5. The PTC thermistor ceramic resistor detection device according to claim 1, characterized in that, Structural adhesive is applied to the gap between the negative pressure nozzle (12) and the nozzle hole (11).

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