CN218628715U - PTC heating plate temperature resistance test fixture - Google Patents
PTC heating plate temperature resistance test fixture Download PDFInfo
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- CN218628715U CN218628715U CN202222979141.5U CN202222979141U CN218628715U CN 218628715 U CN218628715 U CN 218628715U CN 202222979141 U CN202222979141 U CN 202222979141U CN 218628715 U CN218628715 U CN 218628715U
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Abstract
The utility model provides a PTC heating plate temperature resistance test fixture, which comprises a top plate, a bottom plate and a bracket, wherein the top plate and the bottom plate are fixedly connected through the bracket; install a plurality of spring probe on the roof, install a plurality of and spring probe matched with electrode subassembly on the bottom plate, be used for centre gripping PTC heating plate between the bottom of spring probe and the top of electrode subassembly. The utility model clamps a plurality of PTC heating sheets by matching a plurality of spring probes and a plurality of electrode components, tests the temperature resistance characteristic of the PTC heating sheets, pulls the spring probes to keep away from the electrode components, puts the PTC heating sheets on the top of the electrode components, and slowly releases the spring probes, so that the PTC heating sheets can be clamped and fixed by the electrode components and the spring probes under the action of the spring elasticity; the utility model discloses getting that can be very convenient gets PTC heating plate, improved the efficiency that PTC heating plate hinders temperature characteristic test.
Description
Technical Field
The utility model relates to a resistance test technical field especially relates to a PTC heating plate hinders temperature test fixture.
Background
PTC thermistors are high-tech electronic components with semiconductor functions, based on barium titanate or polymeric materials, and when the temperature reaches a certain constant value, the resistance increases significantly, especially around the curie temperature, by 3 to 7 orders of magnitude. The PTC ceramic heating element has the following characteristics: no pollution and electromagnetic radiation; the temperature is quickly increased, the temperature can be automatically controlled, and the service life is long; the voltage application range is wide, and the voltage can be designed between 12V and 600V according to requirements; the design is convenient, the design can be freely carried out from low power to high power, and the appearance can also be designed according to requirements. The PTC series thermistor is widely applied to industrial electronic equipment, aerospace and various military equipment to realize the functions of automatic demagnetization, overcurrent protection, motor starting, constant temperature heating, temperature compensation and the like. In recent years, the rapid development of the automotive industry, particularly electric vehicles, has led to an increasing demand for PTC thermistors.
The temperature resistance characteristic of the PTC is the best scale for measuring the PTC performance, and the accurate acquisition of the temperature resistance characteristic of the PTC is a necessary channel for successfully researching and developing PTC materials, processes and applications. However, the test fixture of the existing PTC temperature resistance test system has the following defects that the existing technology usually provides elasticity to clamp a sample to be tested by bending a stainless steel spring plate, so that the sample to be tested is inconvenient to take and place, and the test efficiency is low; and when the temperature resistance characteristics of a plurality of samples need to be tested simultaneously, two electrode leads need to be led out from each sample, the number of the leads is large, and the leads are complex.
Disclosure of Invention
The utility model provides a PTC heating plate hinders temperature test fixture has solved the sample that awaits measuring among the prior art and has got and put trouble, efficiency of software testing low and wiring complicacy scheduling problem.
The technical scheme of the utility model is realized like this:
a PTC heating piece temperature resistance test fixture comprises a top plate, a bottom plate and a support, wherein the top plate and the bottom plate are fixedly connected through the support; install a plurality of spring probe on the roof, install a plurality of and spring probe matched with electrode subassembly on the bottom plate, be used for centre gripping PTC heating plate between the bottom of spring probe and the top of electrode subassembly.
The utility model clamps a plurality of PTC heating sheets through the matching of a plurality of spring probes and a plurality of electrode components, tests the temperature resistance characteristic of the PTC heating sheets, pulls the spring probes to keep away from the electrode components, puts the PTC heating sheets on the top of the electrode components, and slowly releases the spring probes, so that the PTC heating sheets can be clamped and fixed by the electrode components and the spring probes under the action of the spring force; after the test is finished, the spring probe is directly pulled, the PTC heating sheet is taken out, and then the spring probe is loosened, so that the PTC heating sheet can be conveniently taken and placed, and the efficiency of the PTC heating sheet temperature resistance characteristic test is improved.
As the utility model discloses preferred scheme, electrode subassembly is including the electrode base, electrode and the screening glass that connect gradually, and three part passes through bolted connection, conveniently dismantles the change.
As the utility model discloses preferred scheme, the middle part of screening glass is equipped with the through-hole, and when not testing, spring probe's bottom can be fixed at the through-hole center, avoids spring probe at electrode subassembly's top sliding wear, has prolonged spring probe's life.
As the utility model discloses preferred scheme, install temperature sensor on the bottom plate, this temperature sensor is equipped with a plurality ofly, the ambient temperature that PTC heating plate located in the real-time detection test process of being convenient for.
As the utility model discloses preferred scheme, the electrode base passes through insulating assembly to be installed on the bottom plate, avoids the short circuit.
As a preferred scheme of the present invention, the top plate is made of a conductive material, a plurality of the spring probes are electrically connected to the top plate through conductive bases, and the top plate is electrically connected to the bottom plate through a bracket; during testing, only one electrode lead needs to be led out from the top plate/the bottom plate, and then one electrode lead is respectively led out from each electrode assembly, so that the testing can be performed, namely, the testing of the plurality of PTC heating sheets can share one electrode lead (anode or cathode) led out from the top plate/the bottom plate, the arrangement of the electrode leads is greatly saved, and the wiring is convenient.
As a preferred scheme of the present invention, the spring probe includes a probe cap, a probe rod and a probe head, the probe rod penetrates through the conductive base and the top plate, the probe cap is installed at the top end of the probe rod, the probe head is installed at the bottom end of the probe rod, a spring is sleeved outside the probe rod, and two ends of the spring are respectively abutted against the probe head and the conductive base; when the probe cap is pulled, the probe rod and the probe head are driven to be far away from the electrode assembly, and the spring is compressed; after the probe cap is loosened, the probe head is abutted against the electrode assembly under the action of the elastic force of the spring, so that the PTC heating sheet is clamped.
As the utility model discloses preferred scheme, "L" shape lower margin is installed to the bottom plate bottom, and is applicable in multiple high-low temperature box, does not receive the influence of high-low temperature box layer frame structure.
As the utility model discloses preferred scheme, the side-mounting of support has the detachable deep bead for the PTC heating plate is heated more evenly.
Advantageous effects
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) The utility model clamps a plurality of PTC heating sheets through the matching of a plurality of spring probes and a plurality of electrode components, tests the temperature resistance characteristic of the PTC heating sheets, pulls the spring probes to keep away from the electrode components, puts the PTC heating sheets on the top of the electrode components, and slowly releases the spring probes, so that the PTC heating sheets can be clamped and fixed by the electrode components and the spring probes under the action of the spring force; after the test is finished, the spring probe is directly pulled, the PTC heating sheet is taken out, and then the spring probe is loosened, so that the PTC heating sheet can be conveniently taken and placed, and the efficiency of the PTC heating sheet in the temperature resistance characteristic test is improved;
(2) The utility model discloses through set up the through-hole at the top of electrode subassembly, when not testing, the bottom of spring probe can be fixed in the through-hole, avoids the spring probe to slide the wearing and tearing at the top of electrode subassembly, has prolonged the life of spring probe;
(3) The top plate of the utility model is made of conductive material, and a plurality of spring probes are electrically connected with the top plate through conductive bases respectively; during testing, only one electrode lead is required to be led out from the top plate, and then one electrode lead is led out from each electrode assembly, so that the testing can be performed, namely, the testing of a plurality of PTC heating sheets can share one electrode lead (positive electrode or negative electrode) led out from the top plate, the arrangement of the electrode leads is greatly saved, and the wiring is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an internal schematic view of a PTC heating sheet temperature resistance test fixture of the present invention;
fig. 2 is an external schematic view of a PTC heating sheet temperature resistance test fixture according to the present invention;
fig. 3 is a schematic structural view of an electrode assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of the spring probe and the electrode assembly clamped together according to an embodiment of the present invention;
FIG. 5 is a schematic view of the spring probe and electrode assembly in an embodiment of the present invention in an expanded state;
in the figure: 1. a top plate; 2. a base plate; 3. a support; 4. a spring probe; 5. an electrode assembly; 6. an electrode base; 7. an electrode; 8. a protective sheet; 9. a through hole; 10. a temperature sensor; 11. an insulating assembly; 12. a conductive base; 13. a probe cap; 14. a probe shaft; 15. a probe head; 16. a spring; 17. a ground margin; 18. a wind deflector.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below with reference to embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the embodiment provides a PTC heating sheet temperature resistance test fixture, which includes a top plate 1, a bottom plate 2 and a bracket 3, wherein the top plate 1 and the bottom plate 2 are fixedly connected through the bracket 3, and a detachable wind shield 18 is installed on a side surface of the bracket 3, so that the PTC heating sheet is heated more uniformly; install 20 spring probes 4 on the roof 1, install 20 electrode subassembly 5 with spring probes 4 matched with on the bottom plate 2, be used for centre gripping PTC heating plate between the bottom of spring probes 4 and the top of electrode subassembly 5.
In the embodiment, 20 spring probes 4 and 20 electrode assemblies 5 are matched to clamp 20 PTC heating sheets, and the resistance temperature characteristic test is performed on the PTC heating sheets, wherein the spring probes 4 are pulled away from the electrode assemblies 5, the PTC heating sheets are placed at the top ends of the electrode assemblies 5, and the spring probes 4 are slowly released, so that the PTC heating sheets can be clamped and fixed by the electrode assemblies 5 and the spring probes 4 under the action of the spring force; after the test is finished, the spring probe 4 is directly pulled, the PTC heating sheet is taken out, and then the spring probe 4 is loosened, so that the PTC heating sheet can be taken and placed conveniently, and the efficiency of testing the temperature resistance characteristic of the PTC heating sheet is improved.
As shown in fig. 3, as a preferable solution of the present embodiment, the electrode assembly 5 includes an electrode base 6, an electrode 7 and a protective sheet 8, which are connected in sequence, and the three parts are connected by screws, so that the disassembly and replacement are convenient.
As a preferable scheme of the embodiment, the middle part of the protection sheet 8 is provided with a through hole 9, and when no test is performed, the bottom of the spring probe 4 can be fixed in the through hole 9, so that the spring probe 4 is prevented from sliding and wearing on the top end of the electrode assembly 5, and the service life of the spring probe 4 is prolonged; in this embodiment, the bottom of spring probe 4 is the hemisphere face, because the effect of spring force is pressed at the through-hole center, avoids the horizontal slip.
In this embodiment, the top middle part of electrode 7 is equipped with circular mounting groove, protection piece 8 inlays and establishes in the mounting groove, and the external diameter of protection piece 8 matches with the internal diameter of mounting groove.
The protection plate 8 is made of polytetrafluoroethylene, and the electrode 7 is made of brass material through gold plating, so that the test error can be greatly reduced, and the protection plate is not easy to oxidize when used in a high-temperature and humid environment; the electrode base 6 is made of aluminum alloy, and the weight of the clamp is greatly reduced.
As a preferable scheme of this embodiment, two temperature sensors 10 are installed on the bottom plate 2, and the temperature sensors 10 are convenient to detect the ambient temperature of the PTC heating sheet in the test process in real time.
As a preferred scheme of this embodiment, the electrode base 6 is installed on the bottom plate 2 through an insulating assembly 11 to avoid short circuit, and the insulating assembly 11 includes a ceramic male head and a ceramic female head.
As a preferable scheme of this embodiment, the top plate 1 is made of a conductive material, 20 of the spring probes 4 are respectively electrically connected to the top plate 1 through a conductive base 12, and the top plate is electrically connected to the bottom plate through a bracket; during testing, only one electrode lead is required to be led out from the top plate 1/the bottom plate 2, and then one electrode lead is respectively led out from each electrode assembly 5, namely, the 20 PTC heating plates can share one electrode lead (positive electrode or negative electrode) led out from the top plate 1/the bottom plate 2, so that the arrangement of the electrode leads is greatly saved, and the wiring is convenient. The holder 3 in this embodiment includes an outer holder and a middle holder, and a common electrode lead may be drawn out from the bottom end of the middle holder.
As shown in fig. 4 and 5, as a preferred solution of the present embodiment, the spring probe 4 includes a probe cap 13, a probe rod 14 and a probe head 15, the probe rod 14 penetrates through the conductive base 12 and the top plate 1, the probe cap 13 is installed at the top end of the probe rod 14, the probe head 15 is installed at the bottom end of the probe rod 14, a spring 16 is sleeved outside the probe rod 14, and two ends of the spring 16 are respectively abutted to the probe head 15 and the conductive base 12; when the probe cap 13 is pulled, bringing the probe shaft 14 and the probe tip 15 away from the electrode assembly 5, the spring 16 is compressed; after the probe cap 13 is loosened, the probe head 15 is abutted against the electrode assembly 5 under the action of the elastic force of the spring 16, so that the PTC heating sheet is clamped; when the probe tip 15 abuts the electrode assembly 5, the spring 16 is in a compressed state.
The top plate 1 and the bottom plate 2 in this embodiment are both made of stainless steel material.
As a preferable scheme of this embodiment, the bottom of the bottom plate 2 is mounted with "L" shaped legs 17 (the contact surface between the legs and the ground is "u" type, which has a wider application range), and is suitable for various high-temperature and low-temperature tanks without being affected by the layered structure of the high-temperature and low-temperature tanks.
The use method of the test fixture of the embodiment is as follows:
firstly, the wind shield 18 is detached from the support 3, then 20 spring probes 4 are pulled in sequence, 20 PTC heating sheets are respectively placed between each spring probe 4 and the electrode assembly 5 to be clamped and fixed, then the wind shield 18 on the side face of the support 3 is installed, a clamp is placed in a high-low temperature test box, and resistance values of the PTC heating sheets in different temperature environments are tested through electrode leads led out of the clamp.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The PTC heating sheet temperature resistance test fixture is characterized by comprising a top plate (1), a bottom plate (2) and a support (3), wherein the top plate (1) and the bottom plate (2) are fixedly connected through the support (3); install a plurality of spring probe (4) on roof (1), install a plurality of and spring probe (4) matched with electrode subassembly (5) on bottom plate (2), be used for centre gripping PTC heating plate between the bottom of spring probe (4) and the top of electrode subassembly (5).
2. A PTC heater chip resistance temperature test fixture according to claim 1, wherein the electrode assembly (5) comprises an electrode base (6), an electrode (7) and a protective sheet (8) which are connected in this order.
3. A PTC heater chip resistance temperature test fixture according to claim 2, wherein the protective sheet (8) is provided with a through hole (9) at its central portion.
4. A PTC heater chip temperature resistance test fixture as claimed in claim 1, wherein a temperature sensor (10) is mounted on the base plate (2).
5. A PTC heater chip temperature resistance test jig according to claim 2, wherein the electrode base (6) is mounted on the base plate (2) through an insulating member (11).
6. A PTC heater chip temperature resistance test fixture as claimed in claim 1, wherein the top plate (1) is made of conductive material, and a plurality of the spring probes (4) are electrically connected to the top plate (1) through conductive bases (12).
7. A PTC heater plate temperature resistance test fixture according to claim 6, characterized in that the spring probe (4) comprises a probe cap (13), a probe rod (14) and a probe head (15), the probe rod (14) penetrates through the conductive base (12) and the top plate (1), the probe cap (13) is installed at the top end of the probe rod (14), the probe head (15) is installed at the bottom end of the probe rod (14), the spring (16) is sleeved outside the probe rod (14), and two ends of the spring (16) are respectively abutted against the probe head (15) and the conductive base (12).
8. A PTC heater chip temperature resistance test jig according to claim 1, wherein the bottom of the base plate (2) is provided with "L" shaped legs (17).
9. A PTC heater chip resistance temperature test fixture according to claim 1, wherein a detachable wind shield (18) is installed at a side of the bracket (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222979141.5U CN218628715U (en) | 2022-11-09 | 2022-11-09 | PTC heating plate temperature resistance test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222979141.5U CN218628715U (en) | 2022-11-09 | 2022-11-09 | PTC heating plate temperature resistance test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218628715U true CN218628715U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222979141.5U Active CN218628715U (en) | 2022-11-09 | 2022-11-09 | PTC heating plate temperature resistance test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218628715U (en) |
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2022
- 2022-11-09 CN CN202222979141.5U patent/CN218628715U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Ziheng Inventor after: Wang Li Inventor after: Zhou Xuan Inventor before: Wang Li Inventor before: Zhou Xuan |
|
| CB03 | Change of inventor or designer information |