Thermistor testing machine

Abstract

The utility model relates to the technical field of thermistor testing machines, and discloses a thermistor testing machine, which comprises a testing host and further comprises a fixed bottom frame arranged beside an oil groove on the testing host; the micro hydraulic push rod is arranged on the fixed bottom frame, and the micro hydraulic push rod is used for ascending and descending; the shaking structure is arranged on the micro hydraulic push rod, and the shaking structure is used for reducing silicone oil brought into another oil groove in the test host; the oil absorption sponge is arranged on the shaking structure, the oil absorption sponge is used for preventing silicone oil from dripping on the table top of the test host during movement, and the shaking structure comprises a middle bearing frame. According to the utility model, residual silicone oil on a workpiece can be shaken, the silicone oil can be prevented from dropping on the table board of the equipment during movement, and the silicone oil is prevented from being brought into another oil groove.

Description

Technical Field

[0001] The utility model relates to the technical field of thermistor testing machines, in particular to a thermistor testing machine. Background Art

[0002] A thermistor tester is a professional testing device. Its detection principle is based on the characteristics of thermistors. It is mainly used to test the relationship between the resistance value and temperature of electronic components or materials. It can measure the resistance value of thermistors at different temperatures through current and voltage tests to evaluate their various parameter characteristics. It usually consists of test instruments, high / low temperature oil tanks, thermal balance fixtures, data processing and control systems, etc.

[0003] During the testing process using a thermistor testing machine, the inventors discovered that when a workpiece needs to be immersed in silicone oil and is moved from one oil tank to another, silicone oil from the previous tank will remain on the workpiece. As a result, the silicone oil will drip onto the surface of the equipment during the movement, causing contamination. At the same time, the silicone oil will also be brought into the other oil tank, thereby affecting the purity of the silicone oil in the oil tank and further affecting the detection accuracy. Therefore, we proposed a thermistor testing machine. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a thermistor testing machine, which has the advantages of preventing silicone oil from dripping onto the equipment table during movement and reducing the amount of silicone oil carried into another oil tank, thereby solving the above problems.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose of preventing silicone oil from dripping onto the equipment table during movement and reducing the amount of silicone oil carried into another oil tank, the utility model provides the following technical solution: a thermistor testing machine, comprising a testing host, and further comprising: a fixed bottom frame, the fixed bottom frame being arranged next to the oil tank on the testing host;

[0008] A micro hydraulic push rod is provided on the fixed bottom frame and is used for lifting;

[0009] A shaking structure, the shaking structure being provided on the micro hydraulic push rod and being used to reduce the risk of silicone oil being carried into another oil tank on the test host;

[0010] An oil-absorbing sponge is provided on the shaking structure and is used to prevent silicone oil from dripping onto the test host table during movement.

[0011] As an optimal technical solution of the present invention, the shaking structure includes a middle bearing frame, which is fixedly connected between the bottom end of the middle bearing frame and the end of the micro hydraulic push rod away from the fixed bottom frame, and a telescopic rod is fixedly installed on the inner cavity wall of the middle bearing frame, and the outer surface of the telescopic rod is movably sleeved with a spring, and an upper bearing frame is fixedly installed on the end of the telescopic rod away from the inner cavity wall of the middle bearing frame, one end of the spring is fixedly connected to the upper bearing frame, and a limiting rod is fixedly installed on the outer surface of the upper bearing frame, and the outer surface of the limiting rod is movably connected to the interior of the upper bearing frame. The telescopic rod and the extrusion spring are elastically deformed by being compressed by the moving upper bearing frame. As the moving upper bearing frame continues to move back and forth, the upper bearing frame drives the workpiece to shake continuously, and the silicone oil on the workpiece falls back into the oil tank, thereby reducing the silicone oil from being brought into another oil tank.

[0012] As an optimal technical solution of the present invention, the shaking structure also includes a driving motor, which is fixedly connected to the top of the middle carrying frame. The output shaft on the driving motor passes through the top of the middle carrying frame, and a rotating rod is fixedly installed on the extended part. The outer surface of the rotating rod is fixedly sleeved with an elliptical cam, and the elliptical cam is movably connected to the upper carrying frame. By starting the driving motor, the output shaft on the driving motor drives the rotating rod to rotate, the rotating rod drives the elliptical cam to rotate, and the elliptical cam drives the upper carrying frame to move, thereby facilitating the movement of the upper carrying frame.

[0013] As an optimal technical solution of the present invention, waist-shaped grooves are provided on both side walls of the inner cavity of the middle load-bearing frame, and the inner cavity of the waist-shaped grooves is slidably connected to the outer surface of the limiting rod to facilitate the movement of the limiting rod inside the middle load-bearing frame.

[0014] As a preferred technical solution of the present invention, the inner cavity width of the waist-shaped groove matches the outer surface diameter of the limiting rod, so that the limiting rod can move more smoothly along the waist-shaped groove.

[0015] As a preferred technical solution of the present invention, the inner cavity wall of the upper carrying frame is fixedly connected to the oil-absorbing sponge. When the workpiece needs to be moved to another oil tank, the workpiece is removed from the upper carrying frame and the residual silicone oil on the workpiece is wiped on the oil-absorbing sponge to prevent the silicone oil from dripping onto the test host table during movement. Then the workpiece is placed in another oil tank on the test host, thereby conveniently preventing the silicone oil from dripping onto the test host table during movement.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a thermistor tester with the following beneficial effects:

[0018] 1. The thermistor testing machine passes the workpiece through the inner cavity of the upper bearing frame, and the workpiece is suspended on the upper bearing frame. At the same time, the workpiece is immersed in the silicone oil in the oil tank until the immersion is complete. Then the micro hydraulic push rod is started. At this time, the micro hydraulic push rod drives the shaking structure to rise and drives the workpiece away from the silicone oil until the workpiece is separated from the silicone oil in the oil tank. Then the drive motor is started. At this time, the output shaft on the drive motor drives the rotating rod to rotate, and the rotating rod drives the elliptical cam to rotate. The elliptical cam drives the upper bearing frame to move in the direction of the telescopic rod, and compresses the telescopic rod and the extrusion spring to undergo elastic deformation. At the same time, as the elliptical cam rotates, the upper bearing frame drives the workpiece to shake continuously, and the silicone oil on the workpiece falls back into the oil tank. During this period, the upper bearing frame drives the limit rod to move back and forth along the inner cavity of the waist-shaped groove, and plays the role of limit guide, so as to facilitate the shaking of the residual silicone oil on the workpiece, thereby reducing the silicone oil from being brought into another oil tank.

[0019] 2. This thermistor testing machine removes the workpiece from the upper carrying frame and wipes the residual silicone oil on the workpiece on an oil-absorbing sponge to prevent the silicone oil from dripping onto the test host table during movement. The workpiece is then placed in another oil tank on the test host to prevent the silicone oil from dripping onto the test host table during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the main connection of the fixed bottom frame, micro hydraulic push rod and shaking structure of the utility model;

[0022] Figure 3 This is a bottom view schematic diagram of the connection between the fixed bottom frame, micro hydraulic push rod and shaking structure of the utility model.

[0023] In the figure: 1. Test host; 2. Fixed bottom frame; 3. Micro hydraulic push rod; 4. Shaking structure; 41. Middle bearing frame; 411. Waist-shaped groove; 42. Telescopic rod; 43. Spring; 44. Upper bearing frame; 45. Limit rod; 46. Drive motor; 47. Rotating rod; 48. Elliptical cam; 5. Oil-absorbing sponge. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Reference Figure 1-3, provides a thermistor testing machine, including a testing host 1. The detection principle of the testing host 1 is based on the characteristics of thermistors. Thermistors are electronic components whose resistance value changes with temperature. Thermistors are mainly divided into two types: negative temperature coefficient (NTC) and positive temperature coefficient (PTC).

[0026] Negative Temperature Coefficient (NTC) Thermistors: NTC thermistors have a property of decreasing resistance as the temperature increases and increasing resistance as the temperature decreases. This property makes NTC thermistors very useful in temperature measurement because they can respond quickly to temperature changes.

[0027] Positive Temperature Coefficient (PTC) Thermistor: In contrast to NTC, the resistance of a PTC thermistor increases as the temperature increases and decreases as the temperature decreases. PTC thermistors are often used in overcurrent input protection circuits or resettable fuses for safety applications.

[0028] The working principle of thermistors is based on the fact that different conductive materials have different resistances at different temperatures. As the thermistor particles become hotter or colder, the current flowing through its circuit is hindered with variable resistance. By measuring the change in current, the temperature can be calculated. NTC thermistors are made of metal oxides, while PTC thermistors use titanium compounds.

[0029] The tester also includes: a fixed bottom frame 2, which is arranged next to the oil tank on the test host 1;

[0030] A micro hydraulic push rod 3 is provided on the fixed bottom frame 2 and is used for lifting;

[0031] A shaking structure 4 is provided on the micro hydraulic push rod 3 and is used to reduce the amount of silicone oil that enters another oil tank on the test host 1;

[0032] The oil-absorbing sponge 5 is arranged on the shaking structure 4 and is used to prevent the silicone oil from dripping onto the table of the test host 1 during movement.

[0033] Specifically, if Figure 1 As shown, two oil tanks are provided in the test host 1; a fixed bottom frame 2, a micro hydraulic push rod 3, a shaking structure 4 and an oil-absorbing sponge 5 are respectively provided on the two oil tanks.

[0034] The shaking structure 4 includes a middle load-bearing frame 41, the bottom end of the middle load-bearing frame 41 is fixedly connected to the end of the micro hydraulic push rod 3 away from the fixed bottom frame 2, a telescopic rod 42 is fixedly installed on the inner cavity wall of the middle load-bearing frame 41, and a spring 43 is movably sleeved on the outer surface of the telescopic rod 42, and an upper load-bearing frame 44 is fixedly installed on the end of the telescopic rod 42 away from the inner cavity wall of the middle load-bearing frame 41, one end of the spring 43 is fixedly connected to the upper load-bearing frame 44, and a limiting rod 45 is fixedly installed on the outer surface of the upper load-bearing frame 44, and the outer surface of the limiting rod 45 is movably connected to the interior of the upper load-bearing frame 44.

[0035] The shaking structure 4 also includes a driving motor 46, which is fixedly connected to the top of the middle supporting frame 41. The output shaft on the driving motor 46 passes through the top of the middle supporting frame 41, and a rotating rod 47 is fixedly installed on the extended part. The outer surface of the rotating rod 47 is fixedly sleeved with an elliptical cam 48, and the elliptical cam 48 is movably connected to the upper supporting frame 44.

[0036] Waist-shaped grooves 411 are formed on both side walls of the inner cavity of the middle carrying frame 41 , and the inner cavity of the waist-shaped grooves 411 is slidably connected to the outer surface of the limiting rod 45 .

[0037] The inner width of the waist-shaped groove 411 matches the outer diameter of the limiting rod 45 .

[0038] The inner wall of the upper bearing frame 44 is fixedly connected to the oil-absorbing sponge 5 .

[0039] Working principle: The workpiece is passed through the inner cavity of the upper bearing frame 44 and the workpiece is suspended on the upper bearing frame 44. At the same time, the workpiece is immersed in the silicone oil in the oil tank until the immersion is complete. Then the micro hydraulic push rod 3 fixed on the fixed bottom frame 2 is started. At this time, the micro hydraulic push rod 3 drives the shaking structure 4 to rise and drives the workpiece away from the silicone oil until the workpiece is separated from the silicone oil in the oil tank. Then the driving motor 46 fixed on the upper bearing frame 44 is started. At this time, the output shaft on the driving motor 46 drives the rotating rod 47 fixed on the output shaft to rotate, and the rotating rod 47 drives The elliptical cam 48 rotates, driving the upper bearing frame 44 to move in the direction of the telescopic rod 42, and compressing the telescopic rod 42 and the extrusion spring 43 to elastically deform. At the same time, as the elliptical cam 48 rotates, the upper bearing frame 44 drives the workpiece to continuously shake, and the silicone oil on the workpiece falls back into the oil tank. During this period, the upper bearing frame 44 drives the limiting rod 45 to move back and forth along the inner cavity of the waist-shaped groove 411, and plays the role of limiting guide, thereby facilitating the shaking of the silicone oil remaining on the workpiece, thereby reducing the silicone oil from being brought into another oil tank.

[0040] When the workpiece needs to be moved to another oil tank, the workpiece is removed from the upper supporting frame 44 and the residual silicone oil on the workpiece is wiped on the oil-absorbing sponge 5 to prevent the silicone oil from dripping onto the table of the test host 1 during movement. The workpiece is then placed in another oil tank on the test host 1 to prevent the silicone oil from dripping onto the table of the test host 1 during movement. This device can not only shake the residual silicone oil on the workpiece, but also prevent the silicone oil from dripping onto the equipment table during movement and reduce the amount of silicone oil brought into another oil tank.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A thermistor testing machine, comprising a testing host (1), characterized in that: Also includes: A fixed bottom frame (2), the fixed bottom frame (2) being arranged beside the oil tank on the test host (1); A micro hydraulic push rod (3), the micro hydraulic push rod (3) being arranged on the fixed bottom frame (2), and the micro hydraulic push rod (3) being used for lifting; A shaking structure (4), the shaking structure (4) being provided on the micro hydraulic push rod (3), and the shaking structure (4) being used to reduce the amount of silicone oil brought into another oil tank on the test host (1); An oil-absorbing sponge (5) is provided on the shaking structure (4) and is used to prevent silicone oil from dripping onto the table of the test host (1) during movement.

2. A thermistor testing machine according to claim 1, characterized in that: The shaking structure (4) includes a middle bearing frame (41), the bottom end of the middle bearing frame (41) is fixedly connected to the end of the micro hydraulic push rod (3) away from the fixed bottom frame (2), a telescopic rod (42) is fixedly installed on the inner cavity wall of the middle bearing frame (41), a spring (43) is movably sleeved on the outer surface of the telescopic rod (42), an upper bearing frame (44) is fixedly installed on the end of the telescopic rod (42) away from the inner cavity wall of the middle bearing frame (41), one end of the spring (43) is fixedly connected to the upper bearing frame (44), a limiting rod (45) is fixedly installed on the outer surface of the upper bearing frame (44), and the outer surface of the limiting rod (45) is movably connected to the interior of the upper bearing frame (44).

3. A thermistor testing machine according to claim 2, characterized in that: The shaking structure (4) also includes a driving motor (46), which is fixedly connected to the top of the middle supporting frame (41), and the output shaft of the driving motor (46) passes through the top of the middle supporting frame (41), and a rotating rod (47) is fixedly installed on the extended part, and an elliptical cam (48) is fixedly sleeved on the outer surface of the rotating rod (47), and the elliptical cam (48) is movably connected to the upper supporting frame (44).

4. The thermistor testing machine according to claim 2, characterized in that: Both side walls of the inner cavity of the middle bearing frame (41) are provided with waist-shaped grooves (411), and the inner cavity of the waist-shaped grooves (411) is slidably connected to the outer surface of the limiting rod (45).

5. The thermistor testing machine according to claim 4, characterized in that: The inner cavity width of the waist-shaped groove (411) matches the outer surface diameter of the limiting rod (45).

6. The thermistor testing machine according to claim 2, characterized in that: The inner cavity wall of the upper bearing frame (44) is fixedly connected to the oil-absorbing sponge (5).

Images