JP2013125002A - Constant temperature test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable various endurance tests by maintaining a constant temperature at a severe temperature from an ultra-low temperature to an ultrahigh temperature.SOLUTION: A constant temperature test device for performing various endurance tests of an object to be tested at a constant temperature is provided with a thermostatic chamber that can maintain an optional temperature from a low temperature to a high temperature inside a thermostat and store the object to be tested, also attaches a driving device to a lateral face of the thermostat, and thrusts an output shaft (driving shaft) of the driving device into the thermostatic chamber from the thermostat to make the driving shaft move an operator moving in accordance with the purpose of a test of the object to be tested through a conversion device in the thermostatic chamber.

Description

  The present invention relates to a constant temperature test apparatus for performing various endurance tests on parts of various apparatuses and machines including automobiles under a predetermined temperature.

  These parts may be used under extremely cold temperatures of about minus 40 ° C. to about 120 ° C., and various endurance tests need to be performed under the assumed temperatures. However, you can't take them to such a temperature. Conventionally, there have been devices that perform tests under such special temperatures, but there are many devices that perform electrical tests such as whether semiconductors or the like operate normally.

  However, there are a few that perform mechanical tests such as rotation, friction, bending, and twisting. However, if the temperature is very low, the temperature is set to that temperature (Patent Document 1). The test was conducted by setting the temperature (Patent Document 2). However, when a test is performed at a temperature from such a very low temperature to a very high temperature (hereinafter simply referred to as “low temperature” or “high temperature” for the sake of simplicity), the associated equipment will naturally be at that temperature, causing malfunction. For this reason, there is no one that performs a test (constant temperature) at an arbitrarily set temperature from a low temperature to a high temperature at normal temperature while maintaining the set temperature. Therefore, it has been desired to realize an apparatus capable of performing these tests at room temperature.

JP 09-138190 A JP 2011-112544 A

  The present invention provides a predetermined temperature while maintaining a constant temperature only by entering a driving shaft for testing into a temperature-controlled room that can be maintained at a constant temperature from a low temperature to a high temperature provided inside the temperature-controlled device. It is possible to perform the test.

  Under the above problems, the present invention is a constant temperature test apparatus for performing various endurance tests on a DUT at a constant temperature, as described in claim 1, and is maintained at an arbitrary temperature from a low temperature to a high temperature inside the constant temperature chamber. A temperature-controlled room that can accommodate the device under test is provided, and a drive device is attached to the side of the temperature chamber, and the output shaft (drive shaft) of the drive device enters the temperature-controlled room from the temperature chamber. Thus, a constant temperature test apparatus is provided in which an actuator that moves along a purpose of a test of a device under test is moved via a conversion device on a drive shaft.

  According to the third aspect of the present invention, in the above-described constant temperature test apparatus, the operating element described in claim 2 rotates around the axis, and the conversion device in the storage chamber is eliminated. Providing means for the durability test to be rotation, friction, tension, bending, and twisting of the DUT;

  According to the invention of claim 1, a commercially available thermostat can be used as it is, and the drive shaft and the conversion device can be accommodated in a thermostatic chamber that can be set to any temperature from low to high. The test at the temperature can be performed at room temperature. That is, a drive source can be provided in a constant temperature chamber of a normal thermostat. According to the means of claim 2, the conversion device is not required in the temperature-controlled room, the work is simplified, and the temperature-controlled room can be widely used. Among the tests, the mechanical one can be considered as in claim 3.

It is a front view of a constant temperature test apparatus. It is a longitudinal cross-sectional view of a constant temperature test apparatus. It is a plane sectional view of a constant temperature test device. It is a front view of the principal part of a constant temperature test apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a constant temperature test apparatus according to the present invention, and FIG. 2 is a longitudinal sectional view. This test apparatus is mainly composed of a constant temperature apparatus 1 composed of a box of a large refrigerator. The thermostat 1 has an isolated thermostatic chamber 2 which is set to an arbitrary temperature from a low temperature to a high temperature and can keep the temperature constant. Since such a thermostatic device 1 is commercially available as a finished package product (for example, PU series manufactured by ESPEC Corporation), it may be used.

  Usually, the thermostat 1 has both a heating function and a cooling (freezing) function. However, only a heating element such as a nichrome wire and a cooling element that is a heat exchanger for cooling are guided to the thermostatic chamber 2, and the heating and The cooler 1 a is installed inside the thermostat 1 outside the thermostatic chamber 2. It is because it is necessary to operate the thermostat 1 at normal temperature.

  In the present invention, a mounting base 3 is provided on the side surface of the thermostatic device 1 and a driving device 4 including a motor and a transmission is installed. A through-hole 6 is formed in the body to enter the temperature-controlled room 2. In addition, although the heat-sealable bearing 7 is provided in the through-hole 6 through which the drive shaft 5 passes through the wall of the temperature-controlled room 2, the portion that passes through the temperature-controlled device 1 may be provided with a margin. This is because when the inside of the thermostat 1 becomes low temperature or high temperature due to the influence of the thermostatic chamber 2 or the like, air enters and exits from the outside or from the outside, and heating and cooling can be performed. Thus, the reason why the drive device 4 is installed outside the thermostat 1 is to allow the commercially available thermostat 1 to be used as it is.

  The test object 8 is accommodated in the temperature-controlled room 2, and a predetermined test is performed on the test object 8. However, since some movable part is required for the test, this is performed by the actuator 9. . For this reason, the actuator 9 performs various operations, and the conversion device 10 converts the rotation of the drive shaft 5 that rotates the actuator 9 into a predetermined operation of the actuator 9. In this example, an object to be tested 8 is a sheet, this is suspended in a U shape, one is fixed, and the other is moved up and down to perform a bending durability test.

  Accordingly, the conversion device 10 of this example converts rotational motion into linear motion, but in this example, a scotch-yoke mechanism is incorporated. Although FIG. 4 is the front view, the converter 10 is installed in the temperature-controlled room 2, the disk 11 is rotated by the drive shaft 5 that is plunged, and the roller 12 is attached to the eccentric part of the disk 11, The roller 12 is inserted into the horizontally long slot 13 of the flat actuator 9. Thus, when the drive shaft 5 is rotated, the roller 12 rotates and moves in the long hole 13, and accordingly, the actuator 9 is operated up and down.

  In this case, since the guide 14 for guiding the upper and lower sides of the actuator 9 is necessary, the support column 15 is set up in the temperature-controlled room 2, and the guide 14 is fixed thereto. An attachment body 16 for attaching the device under test 8 is attached to the front surface of the actuator 9, and the other end of the device under test 8 is fastened thereto. A support column 17 is also set up on the opposite surface of the support column 15, and an attachment body 18 for fixing the device under test 8 is attached to the front surface thereof, and one end of the device under test 8 is fixed thereto.

  As described above, when the drive device 4 is driven, the drive shaft 5 rotates, and the actuator 9 can be moved up and down to perform an endurance test for bending the device under test 8. At this time, the heating / cooling machine 1a provided inside the thermostat 1 is operated to guide the heating element and cooling element to the thermostatic chamber 2, and the inside is set to a predetermined temperature. Note that the number of times of bending at this time can be counted. By the way, if the drive shaft 5 is rotated, it naturally rubs against the heat-sealing bearing 7 of the temperature-controlled room 2, so a fan 19 is attached above the drive shaft 5 to cool at high temperatures and to dew at low temperatures. It is preventing.

  There are various tests of the device under test 8, and the operation of the actuator 9 is also various in accordance with this. Specifically, a. Continuous unidirectional rotation, b. Continuous one-way intermittent rotation, c. Rocking (forward and reverse rotation), d. There is something like reciprocation. Since these can be realized by the drive shaft 5 itself or the conversion device 10, the structure of the heat-sealable bearing 7 in the portion where the drive shaft 5 enters the temperature-controlled room 2 which is the core for any operation of the actuator 9. Are the same. Further, the size and shape of the driving device 4 change depending on the test. Since this is because the mounting base 3 is provided outside the thermostatic device 1, the thermostatic device 1 itself may be a normal one. This will be specifically described below.

a. Continuous unidirectional rotation The wear test of sealing materials and bearing materials, and the load test of rotating bodies are conceivable. In this case, the drive shaft 5 set to a desired number of rotations may be used as the actuator 9, and therefore the conversion device 10 such as a transmission device may be installed outside the temperature-controlled room 2.

b Continuous one-way intermittent rotation The target of the test is the same as above, but it is possible to perform intermittent rotation. Also in this case, since the actuator 9 can use the drive shaft 5, a known Geneva mechanism, a missing gear mechanism or the like that is the conversion device 10 can be installed outside the temperature-controlled room 2.

c. Oscillation In this case, the oscillation means that the actuator 9 is caused to perform an oscillating motion (pendulum motion) using the drive shaft 5 as a drive source in the temperature-controlled room 2, so that the surface 9 or the linear body such as a sheet or a wire is used. Such as bending or twisting of the device under test 8. As a mechanism in this case, there are a mechanism in which a rack and pinion is added to the scotch yoke mechanism, a crank rod mechanism, a crank lever mechanism, and a cam lever mechanism.

d. Reciprocating motion By moving the actuator 9 back and forth and back and forth in the temperature-controlled room 2, the test has the largest number of movements, and there are a number of tests including a sliding wear test. The movement of the actuator 9 is also included in the above-described test by folding the sheet into a U shape and testing. There is also a switch button on / off operation. In this case, there are a mechanism such as a scotch / yoke mechanism, a crank / rod mechanism, and a cam / lever mechanism. In addition, a curved motion and a linear motion of the actuator 9 are not impossible.

  In the above c and d, the converter 10 that causes the actuator 9 to perform a predetermined operation from the drive shaft 5 is housed inside the temperature-controlled room 2. Therefore, a material and lubricating oil that can withstand these temperatures are used. However, since the drive shaft 5 itself can be used for those in which the actuator 9 rotates continuously, intermittently, or forward / reversely, which can be rotated around the axis, the conversion device 10 can be provided outside the temperature-controlled room 2. Is as described above.

  The above description is based on the premise that a commercially available packaged product that can perform both heating and cooling is used as a thermostat, but of course, the heater and the refrigerator may be used separately. Even in this case, although the main body is inside the box, it is installed outside the temperature-controlled room, and only the heating element and cooling element are guided to the temperature-controlled room so that the heater and refrigerator can be operated at room temperature. To make the inside of the constant temperature room as wide as possible.

DESCRIPTION OF SYMBOLS 1 Constant temperature device 1a Heating / cooling device 2 Temperature control chamber 3 Mounting stand 4 Drive device 5 Drive shaft 6 Through-hole 7 Heat seal 8 Test object 9 Actuator 10 Conversion device 11 Disc 12 Roller 13 Long hole 14 Guide 15 Post 16 Installation Body 17 Prop 18 Mounting body 19 Fan

Claims (3)

  This is a constant temperature test device that performs various durability tests on the device under test at a constant temperature. It can be maintained at any temperature from low temperature to high temperature inside the temperature chamber and a temperature chamber that can accommodate the device under test is provided. A drive device is attached to the side of the vessel, and the output shaft (drive shaft) of the drive device enters the temperature-controlled room from the thermostatic chamber. A constant temperature test apparatus characterized by moving a moving actuator.   The constant temperature test apparatus according to claim 1, wherein the actuator rotates around the axis and the conversion device in the constant temperature chamber is eliminated. 2. The constant temperature test apparatus according to claim 1, wherein the durability test is rotation, friction, tension, bending, or twisting of the test object.