A fixed clamp for detecting a PTC heater

Abstract

The utility model discloses a kind of fixed clamps for PTC heater detection, including detection platform;Detection platform is slidably provided with vertical support;Multiple bearing plates are equidistantly arranged in length direction in vertical support one side;Multiple bearing plates are all placed with PTC heating module correspondingly;Electrode pin is correspondingly installed in the end of PTC heating module away from vertical support;By setting fixed clamping plate and movable clamping plate movable horizontally in monitoring platform, the PTC heating module to be detected is first limited, then using first cross plate and second cross plate arranged up and down, by the cooperation of first motor, second motor and first screw rod and second screw rod, drive first vertical plate and second vertical plate staggered arrangement, the electrode pin of PTC heating module is secondly clamped and fixed, the detection work of multiple PTC heating modules can be carried out, avoid single multiple detection mode, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of PTC heater testing technology, specifically, it relates to a fixing fixture for testing PTC heaters. Background Technology

[0002] A PTC heater is an electric heating device that uses positive temperature coefficient (PTC) ceramic material as its heating element. It is composed of a PTC ceramic heating element and an aluminum alloy heat sink (such as a corrugated heat sink or aluminum tube) bonded together at high temperature. After production, PTC heaters typically require a fixture to test the PTC heating module. During testing, the fixture uses a precise mechanical structure to ensure accurate positioning and stable clamping of the heating module or housing on the test bench, providing a basis for subsequent electrical performance tests (such as withstand voltage and insulation tests) and airtightness tests.

[0003] Patent CN222570551U discloses a fixing fixture for testing a PTC heater, including a testing platform. A vertical plate is fixedly connected to one side of the top of the testing platform, and a positioning cylinder is fixedly installed on the other side of the top. By setting a positioning reminder component, a positioning reminder can be given after the PTC heating module is clamped and positioned. During the positioning process, the fixing plate first contacts the surface of the workpiece. As the positioning plate moves towards the PTC heating module, it works in conjunction with the sliding rod, the fixing plate, and the impact block to turn on the LED light of the impact block, thereby giving a positioning reminder. It is possible to intuitively understand whether the positioning plate has completed clamping and positioning.

[0004] In the aforementioned patented technical solution, the fixing fixture uses LED lights to determine whether the clamping and positioning are complete. After positioning the PTC heating module using the electrode testing fixture and drive assembly, the electrode pins are clamped for power-on testing. However, this fixture can only handle a single PTC heating module and cannot simultaneously perform fixing and testing on multiple PTC heating modules. When multiple PTC heating modules need to be tested, they can only be tested sequentially after testing a single PTC heating module, which prolongs the testing time, increases manpower, leads to low work efficiency, and affects the overall testing progress, thus having certain limitations. Utility Model Content

[0005] To address the technical problem that existing PTC heater testing fixtures cannot simultaneously test multiple PTC heating modules, resulting in low work efficiency, this utility model provides a PTC heater testing fixture.

[0006] The objective of this utility model can be achieved through the following technical solutions: A fixing fixture for testing a PTC heater includes a testing platform; a support frame is slidably mounted on the testing platform; multiple support plates are equidistantly arranged along the length of one side of the support frame; a PTC heating module is placed on each of the multiple support plates; electrode pins are installed on the end of each PTC heating module away from the support frame; a vertical fixing plate is fixedly mounted on the testing platform corresponding to one side of the PTC heating module; and a vertical movable plate is slidably mounted on the testing platform corresponding to the other side of the PTC heating module.

[0007] Furthermore, the detection platform is provided with a first horizontal plate slidably disposed below the electrode pins of the PTC heating module; multiple vertical first upright plates are equidistantly disposed on the upper surface of the first horizontal plate; a second horizontal plate is slidably connected to the end of the first upright plate away from the first horizontal plate; multiple vertical second upright plates are equidistantly disposed on the lower surface of the second horizontal plate, and the second upright plates and the first upright plates are arranged alternately.

[0008] Furthermore, the first horizontal plate is internally threaded with a first lead screw; a first motor is fixedly mounted on one end of the first lead screw; the second horizontal plate is internally threaded with a second lead screw; a second motor is fixedly mounted on one end of the second lead screw.

[0009] Furthermore, electrode plates are provided on both the first and second upright plates at positions corresponding to the electrode pins of the PTC heating module.

[0010] Furthermore, the length of the first upright plate is greater than the height of the stack of PTC heating modules to be tested; the length of the second upright plate is the same as that of the first upright plate.

[0011] Furthermore, a support plate is provided on the side of the movable clamp away from the PTC heating module, and the support plate has a right-angled trapezoidal structure.

[0012] Furthermore, a telescopic cylinder is provided on the side of the support plate away from the movable clamping plate, and the telescopic cylinder is fixed to the testing platform by a fixing ring.

[0013] The beneficial effects of this utility model are: 1. This utility model uses a fixed clamping plate and a horizontally movable clamping plate on the monitoring platform to initially limit the PTC heating module to be tested. Then, using the first and second horizontal plates arranged vertically, and through the cooperation of the first motor, the second motor, the first lead screw, and the second lead screw, the staggered first and second vertical plates are driven to clamp and fix the electrode pins of the PTC heating module a second time. This allows for the testing of multiple PTC heating modules, avoiding the need for multiple tests per module, saving manpower and resources, shortening the testing time, and improving work efficiency.

[0014] 2. This utility model provides electrode plates on both the first and second upright plates corresponding to the electrode pins of the PTC heating module. Each electrode plate corresponds to a different electrode pin. During simultaneous testing, an independent and parallel electrical connection circuit can be established for each PTC heating module. This allows for clear, accurate, and non-interfering acquisition of real-time performance data for each module, effectively avoiding signal crosstalk and misjudgment caused by sharing a single detection circuit, and greatly improving the accuracy and reliability of batch testing.

[0015] 3. This utility model provides a right-angled trapezoidal support plate on one side of the movable clamping plate. When the movable clamping plate and the fixed clamping plate limit and fix the PTC heating module, the inclined surface of the support plate can provide stable auxiliary support for the movable clamping plate on the side of the module, effectively keeping the module in a tightly clamped state and preventing its displacement. This ensures the accurate alignment and uniform pressure between the contact positions of all electrode pins and the corresponding detection electrode plates, further improving the stability of the batch testing process and the consistency of the results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first horizontal plate in this utility model; Figure 3 This is a schematic diagram of the structure of the bearing plate in this utility model; The attached diagram lists the components represented by each number as follows: 1. Testing platform; 2. Support plate; 3. Movable clamping plate; 4. Telescopic cylinder; 5. Fixing ring; 6. Bearing plate; 7. First horizontal plate; 8. First lead screw; 9. First motor; 10. Second horizontal plate; 11. Second motor; 12. Fixing clamping plate; 13. PTC heating module; 14. Stand; 15. Electrode pins; 16. Second lead screw; 17. First upright plate; 18. Second upright plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 - Figure 3As shown, a fixing fixture for testing a PTC heater includes a testing platform 1; a support frame 14 is slidably mounted on the testing platform 1; multiple support plates 6 (three in this embodiment) are equidistantly arranged along the length of one side of the support frame 14; a PTC heating module 13 is placed on each support plate 6; an electrode pin 15 is installed on the end of each PTC heating module 13 away from the support frame 14; a vertical fixing plate 12 is fixedly mounted on the testing platform 1 at a position corresponding to the PTC heating module 13, the fixing plate 12 having a rectangular structure, used to limit the position of the PTC heating module 13; the testing platform 1... A vertical movable clamping plate 3 is slidably installed on the other side of the PTC heating module 13; a support plate 2 is provided on the side of the movable clamping plate 3 away from the PTC heating module 13. The support plate 2 has a right-angled trapezoidal structure and is used to support the movable clamping plate 3, further assisting the movable clamping plate 3 in clamping the PTC heating module 13; a telescopic cylinder 4 is provided on the side of the support plate 2 away from the movable clamping plate 3. The telescopic cylinder 4 is fixed to the detection platform 1 by a fixing ring 5. The telescopic cylinder 4 applies force to the support plate 2, thereby driving the movable clamping plate 3 to slide horizontally, which facilitates the clamping operation of PTC heating modules 13 of different specifications.

[0019] The detection platform 1 is slidably provided with a first horizontal plate 7 below the electrode pin 15 of the PTC heating module 13; the first horizontal plate 7 is internally threaded with a first lead screw 8, which passes through both ends of the first horizontal plate 7 and extends outward; a first motor 9 is fixedly provided at one end of the first lead screw 8 and is connected to the output end of the first motor 9; a plurality of vertical first upright plates 17 (five are provided in this embodiment) are equidistantly arranged on the upper surface of the first horizontal plate 7, and the length of the first upright plates 17 is higher than the stacking height of the PTC heating modules 13 to be tested.

[0020] The first vertical plate 17 is slidably connected to the end of the first horizontal plate 7 away from the first horizontal plate 7, and the second horizontal plate 10 has the same specifications as the first horizontal plate 7; the second horizontal plate 10 is internally threaded with a second lead screw 16, which passes through both ends of the second horizontal plate 10 and extends outward; a second motor 11 is fixedly installed at one end of the second lead screw 16 and connected to the output end of the second motor 11; multiple vertical second vertical plates 18 are equidistantly arranged on the lower surface of the second horizontal plate 10, and the second vertical plates 18 have the same length as the first vertical plate 17 and are arranged alternately. By moving the first vertical plate 17 and the second vertical plate 18, the electrode pins 15 of the PTC heating module 13 can be clamped, thereby performing the testing operation of the PTC heating module 13; the first vertical plate 17 and the second vertical plate 18 are respectively provided with electrode plates (not shown in the figure) at the positions corresponding to the electrode pins 15 of the PTC heating module 13. By simultaneously testing the corresponding PTC heating module 13 with the evenly distributed electrode plates, the test results can be clearly obtained.

[0021] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below: In practical use, the operator first places the PTC heating modules 13 to be tested onto the support plate 6 on one side of the upright 14, then pushes the upright 14 to the side of the fixed clamping plate 12, and then activates the telescopic cylinder 4 to push the movable clamping plate 3 closer to the stacked PTC heating modules 13 until the stacked PTC heating modules 13 are clamped, thus completing the fixing of the PTC heating modules 13; after the PTC heating modules 13 are fixed, the first motor 9 is used to drive the first horizontal plate 7 towards the PTC heating module. The electrode pins 15 of the PTC heating module 13 are brought closer together until the electrode plates evenly distributed on the first upright plate 17 are in contact with the corresponding electrode pins 15. At the same time, the second motor 11 is started, and the second lead screw 16 drives the second horizontal plate 10 to move closer to the other side of the electrode pins 15 of the PTC heating module 13 until the second upright plate 18 cooperates with the first upright plate 17 to clamp the electrode pins 15, thus completing the further fixation of the PTC heating module 13. Finally, after the first upright plate 17 and the second upright plate 18 clamp the electrode pins 15, the power-on test of the PTC heating module 13 begins.

[0022] This invention utilizes a monitoring platform with a fixed clamping plate 12 and a horizontally movable clamping plate 3 to initially limit the PTC heating module 13 to be tested. Then, using the vertically arranged first horizontal plate 7 and second horizontal plate 10, and through the cooperation of the first motor 9, the second motor 11, the first lead screw 8, and the second lead screw 16, the staggered first vertical plate 17 and second vertical plate 18 are driven to clamp and fix the electrode pins 15 of the PTC heating module 13 a second time. This allows for the testing of multiple PTC heating modules 13, avoiding the need for multiple tests per module, saving manpower and resources, shortening testing time, and improving work efficiency.

[0023] Furthermore, this utility model provides electrode plates on both the first upright plate 17 and the second upright plate 18 corresponding to the electrode pins 15 of the PTC heating module 13. The electrode plates are set for each electrode pin 15. During simultaneous detection, an independent and parallel electrical connection circuit can be established for each PTC heating module 13. This allows for clear, accurate, and non-interfering acquisition of real-time performance data of each module, effectively avoiding signal crosstalk and misjudgment caused by sharing a detection circuit, and greatly improving the accuracy and reliability of batch testing.

[0024] Furthermore, this utility model provides a right-angled trapezoidal support plate 2 on one side of the movable clamping plate 3. When the movable clamping plate 3 and the fixed clamping plate 12 limit and fix the PTC heating module 13, the inclined surface of the support plate 2 can provide stable auxiliary support for the movable clamping plate 3 on the side of the module, effectively keeping the module in a tightly clamped state and preventing its displacement. This ensures the accurate alignment and uniform pressure of the contact positions between all electrode pins 15 and the corresponding detection electrode plates, further improving the stability of the batch testing process and the consistency of the results.

[0025] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A fixing fixture for testing PTC heaters, comprising a testing platform (1); characterized in that: A support frame (14) is slidably mounted on the testing platform (1); multiple support plates (6) are equidistantly mounted on one side of the support frame (14) along the length direction; a PTC heating module (13) is placed on each of the multiple support plates (6); Electrode pins (15) are installed on the end of the PTC heating module (13) away from the stand (14); a vertical fixed clamp (12) is fixedly installed on the test platform (1) on one side of the PTC heating module (13); a vertical movable clamp (3) is slidably installed on the test platform (1) on the other side of the PTC heating module (13).

2. The fixing fixture for testing a PTC heater according to claim 1, characterized in that: The detection platform (1) is provided with a first horizontal plate (7) slidably disposed below the electrode pin (15) on the PTC heating module (13); a plurality of vertical first upright plates (17) are equidistantly disposed on the upper surface of the first horizontal plate (7). The first vertical plate (17) is slidably connected to the second horizontal plate (10) at the end away from the first horizontal plate (7); multiple vertical second vertical plates (18) are equidistantly arranged on the lower surface of the second horizontal plate (10), and the second vertical plates (18) and the first vertical plate (17) are arranged alternately.

3. The fixing fixture for testing a PTC heater according to claim 2, characterized in that: The first horizontal plate (7) is internally threaded with a first lead screw (8); a first motor (9) is fixedly installed at one end of the first lead screw (8); the second horizontal plate (10) is internally threaded with a second lead screw (16); a second motor (11) is fixedly installed at one end of the second lead screw (16).

4. A fixing fixture for testing a PTC heater according to claim 2, characterized in that: The first upright plate (17) and the second upright plate (18) are each provided with electrode plates corresponding to the positions of the electrode pins (15) of the PTC heating module (13).

5. A fixing fixture for testing a PTC heater according to claim 2, characterized in that: The length of the first upright plate (17) is higher than the stack height of the PTC heating module (13) to be tested; the length of the second upright plate (18) is the same as that of the first upright plate (17).

6. A fixing fixture for testing a PTC heater according to claim 1, characterized in that: The movable clamp (3) is provided with a support plate (2) on the side away from the PTC heating module (13), and the support plate (2) is in the form of a right trapezoidal structure.

7. A fixing fixture for testing a PTC heater according to claim 6, characterized in that: A telescopic cylinder (4) is provided on the side of the support plate (2) away from the movable clamping plate (3), and the telescopic cylinder (4) is fixed on the detection platform (1) by a fixing ring (5).

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