A measuring device for bimetallic deflection

Abstract

The present invention belongs to the technical field of bimetal performance testing, and specifically discloses a measuring device for bimetal deflection. The measuring device for bimetal deflection provided by the present invention has two heating boxes with different heating temperatures. The first end of the detection mechanism can be pressed against the second end of the bimetal to be measured. The driving device can drive the clamping device to move in the second direction and can also drive the clamping device to move in the first direction, so that the bimetal to be measured on the bimetal fixing unit is placed in different heating boxes, meeting the requirements of bimetal deflection testing. The detection mechanism is used to detect the displacement of the second end of the bimetal to be measured along the first direction when it bends upward in different heating boxes, thereby obtaining the deflection performance of the bimetal to be measured. The measuring device provided by the present invention can achieve rapid measurement, without frequent heating and cooling, shortening the testing cycle of bimetal deflection and improving the use efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of bimetal performance testing, and particularly to a measuring device for bimetal deflection. Background Art

[0002] Bimetal elements are used as driving mechanisms in products such as circuit breakers, thermal overload relays, and AC motor starters to achieve the function of long-delay action protection characteristics. The bimetal element is formed by hot rolling two alloys with significantly different linear expansion coefficients. When heated, the bimetal element bends from the high-expansion layer (active layer) to the low-expansion layer (passive layer). When the current is too large, the element acts due to "heat", pushing the operating mechanism of the product to switch the contact state and achieve the purpose of protecting the circuit.

[0003] For the performance detection of bimetal elements, such as the deflection of bimetal elements, a thermal bimetal sheet deflectometer is usually used to test the deflection of the bimetal. Currently, the thermal bimetal sheet deflectometer uses a temperature-controlled heating bath, and the initial temperature and heating temperature need to be set. For repeated testing, it is necessary to frequently raise and lower the temperature. To test the bimetal deflection of different batches, it is also necessary to frequently raise and lower the temperature. The testing cycle is long and the equipment utilization efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a measuring device for bimetal deflection, which can achieve rapid measurement, without the need for frequent heating and cooling, shorten the testing cycle of bimetal deflection, and improve the equipment utilization efficiency.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A measuring device for bimetal deflection, comprising:

[0007] A heating device, including two heating boxes with different heating temperatures;

[0008] A clamping device, including a clamping base, on which a detection mechanism and a bimetal fixing unit are provided. The bimetal fixing unit is used to fix the first end of the bimetal to be tested and make the second end of the bimetal to be tested suspended. The first end of the detection mechanism is used to press against the second end of the bimetal to be tested, and the detection mechanism is used to detect the displacement amount when the second end of the bimetal to be tested bends upward along the first direction;

[0009] A driving device, arranged on the heating device, the clamping base is connected to the driving device. The driving device is used to drive the clamping device to move along the first direction, so that the bimetal to be tested on the bimetal fixing unit is placed in the heating box, or used to drive the clamping device to move along the second direction, so that the clamping device moves between the two heating boxes.

[0010] As an alternative technical solution of the above bimetal deflection measuring device, a liquid is to be placed in the heating box, and a stirrer is respectively provided for each heating box, and the stirrer is used for stirring the liquid in the heating box; and / or,

[0011] A heating pipe and a temperature detecting element are respectively provided in each heating box, the heating pipe is used for heating the heating box, and the temperature detecting element is used for detecting the temperature in the heating box.

[0012] As an alternative technical solution of the above bimetal deflection measuring device, the driving device includes a first driving unit and a second driving unit. The first driving unit is arranged on the heating device, the second driving unit is connected to the first driving unit, the clamping base is connected to the second driving unit, the first driving unit is used for driving the second driving unit to move along a second direction so that the clamping device moves between the two heating boxes, and the second driving unit is used for driving the clamping base to move along a first direction so that the bimetal to be measured on the bimetal fixing unit is placed in the heating box.

[0013] As an alternative technical solution of the above bimetal deflection measuring device, the detection mechanism includes a displacement detection unit and a measuring rod unit. The displacement detection unit and the bimetal fixing unit are arranged on opposite sides of the clamping base. The first end of the measuring rod unit is connected to the detection end of the displacement detection unit, and the second end passes through the clamping base and is used for pressing against the second end of the bimetal to be measured. The displacement detection unit is used for detecting the displacement amount when the second end of the bimetal to be measured bends upward along the first direction.

[0014] As an alternative technical solution of the above bimetal deflection measuring device, a gravity block is detachably arranged on the measuring rod unit, and the gravity block is used for applying a force downward along the first direction by the measuring rod unit to the second end of the bimetal to be measured.

[0015] As an alternative technical solution of the above bimetal deflection measuring device, the displacement detection unit includes a displacement detecting element and a fixing component. The first end of the fixing component is connected to the clamping base, the displacement detecting element is connected to the second end of the fixing component, the first end of the measuring rod unit is elastically connected to the detection end of the displacement detecting element, and a measuring rod support is arranged on the fixing component;

[0016] The measuring rod support can be connected to or separated from the measuring rod unit. Connecting the measuring rod support to the measuring rod unit causes the measuring rod unit to move upward in the first direction, and the second end of the measuring rod unit is in a separated state from the second end of the bimetal to be measured. When the measuring rod support is separated from the measuring rod unit, the measuring rod unit moves downward in the first direction, and the second end of the measuring rod unit presses against the second end of the bimetal to be measured.

[0017] As an alternative technical solution of the above bimetal deflection measuring device, a long slot extending in the second direction is provided on the clamping base, and the second end of the measuring rod unit passes through the long slot;

[0018] The clamping device further includes a translation adjustment unit provided on the clamping base. The displacement detection unit is connected to the translation adjustment unit, and the translation adjustment unit is used to adjust the position of the displacement detection unit relative to the clamping base so that the second end of the measuring rod unit approaches or moves away from the second end of the bimetal to be measured in the second direction.

[0019] As an alternative technical solution of the above bimetal deflection measuring device, the translation adjustment unit includes a support platform and a translation driving member. The support platform is slidably connected to the clamping base in the second direction. The displacement detection unit is provided on the support platform. The translation driving member is fixedly provided on the clamping base, and the driving end of the translation driving member is connected to the support platform. The translation driving member is used to drive the support platform to move in the second direction.

[0020] As an alternative technical solution of the above bimetal deflection measuring device, the bimetal fixing unit includes a first clamping plate, a second clamping plate and a clamping plate driving assembly. The first clamping plate is spaced from the clamping base, and the first clamping plate is fixedly connected to the clamping base through a connecting member. The clamping plate driving assembly is provided on the clamping base, and the second clamping plate is connected to the clamping plate driving assembly. The clamping plate driving assembly is used to drive the second clamping plate to move towards the first clamping plate in the first direction to clamp the bimetal to be measured, or drive the second clamping plate to move away from the first clamping plate in the first direction to release the bimetal to be measured.

[0021] As an optional technical solution for the above-mentioned bimetallic deflection measuring device, the clamping plate driving assembly includes a rotating member, a connecting block and a plurality of linkage rods, the first ends of the plurality of linkage rods respectively pass through the clamping base and are fixedly connected to the second clamping plate, the second ends of the plurality of linkage rods are respectively fixedly connected to the connecting block, the rotating member is placed on the side of the clamping base away from the second clamping plate, and the first end of the rotating member is rotatably connected to the clamping base, the connecting block is screwed on the rotating member, and the rotation of the rotating member is used to drive the connecting block to move, so as to drive the linkage rod to move along the first direction.

[0022] As an optional technical solution for the above-mentioned bimetal deflection measuring equipment, the second clamping plate includes a connecting plate and a clamping plate, the connecting plate, the clamping plate and the first clamping plate are stacked in sequence along a first direction, the first clamping plate is arranged above the clamping plate, the first end of the linkage rod passes through the first clamping plate and is fixedly connected to the connecting plate, the clamping plate and the linkage rod are detachably connected, and the clamping plate is provided with a positioning groove for accommodating the bimetal to be measured on the side facing the first clamping plate.

[0023] Beneficial effects of the present invention:

[0024] The bimetal deflection measuring device provided by the present invention comprises a heating device including two heating boxes, the two heating boxes have different heating temperatures, a bimetal fixing unit is used to fix the first end of the bimetal to be tested, the second end of the bimetal to be tested is suspended, the first end of the detection mechanism can be pressed against the second end of the bimetal to be tested, the driving device can drive the clamping device to move in the second direction, and can also drive the clamping device to move in the first direction, so that the bimetal to be tested on the bimetal fixing unit is placed in different heating boxes to meet the requirements of the bimetal deflection test, the detection mechanism is used to detect the displacement of the second end of the bimetal to be tested when it is bent upward along the first direction in different heating boxes, and then the deflection performance of the bimetal to be tested is obtained; the measuring device provided by the present invention can realize fast measurement without frequent heating and cooling, shortens the test cycle of the bimetal deflection, and improves the use efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of a bimetal deflection measuring device provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the connection between the clamping device and the driving device provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a driving device provided by an embodiment of the present invention;

[0028] Figure 4It is a schematic structural diagram of the clamping device provided by an embodiment of the present invention;

[0029] Figure 5 It is a schematic structural diagram of the measuring rod unit provided by an embodiment of the present invention;

[0030] Figure 6 It is a partial cross-sectional view of the connection between the measuring rod unit, the translation adjustment unit, and the clamping base provided by an embodiment of the present invention;

[0031] Figure 7 It is a schematic structural diagram of the measuring rod support provided by an embodiment of the present invention;

[0032] Figure 8 It is a first partial cross-sectional view of the bimetal fixing unit provided by an embodiment of the present invention;

[0033] Figure 9 It is a second partial cross-sectional view of the bimetal fixing unit provided by an embodiment of the present invention;

[0034] Figure 10 It is a schematic structural diagram of the clamping plate provided by an embodiment of the present invention;

[0035] Figure 11 It is a schematic structural diagram of the clamping base provided by an embodiment of the present invention;

[0036] Figure 12 It is a first axonometric view of the translation adjustment unit provided by an embodiment of the present invention;

[0037] Figure 13 It is a second axonometric view of the translation adjustment unit provided by an embodiment of the present invention.

[0038] In the figure:

[0039] 100, bimetal to be measured; 1, heating device; 2, clamping device; 3, driving device; 4, operation control device; 5, power supply and temperature control unit;

[0040] 11, heating box; 12, stirrer;

[0041] 31, first driving unit; 311, first slide rail; 312, first slider; 32, second driving unit; 321, mounting seat; 322, second slide rail; 323, second slider; 324, second driving member;

[0042] 41, display control panel; 42, emergency stop button;

[0043] 51, power cabinet; 52, heating box temperature controller; 521, temperature display; 522, temperature adjustment knob;

[0044] 10. Clamping base; 21. Detection mechanism; 20. Displacement detection unit; 30. Bimetal fixing unit; 40. Measuring rod unit; 50. Gravity block; 60. Measuring rod support; 70. Translation adjustment unit;

[0045] 101. Long strip hole; 102. Push handle;

[0046] 201. Displacement detector; 202. Fixing assembly; 2021. Fixing rod; 2022. Fixing block; 203. Positioning ring;

[0047] 301. First clamping plate; 3011. Guide block; 302. Second clamping plate; 3021. Connecting plate; 3022. Clamping plate; 3023. Positioning groove; 3024. Clamping groove; 3025. Guide groove; 303. Clamping plate driving assembly; 3031. Rotating part; 30311. Screw; 30312. Nut; 3032. Connecting block; 3033. Linking rod; 3034. Indicator; 304. Connecting piece;

[0048] 401. Measuring rod; 4011. First rod section; 4012. Second rod section; 4013. First boss; 4014. Second boss; 4015. Third rod section;

[0049] 501. Through hole; 502. Through slot;

[0050] 601. Support arm; 602. Clamping plate; 603. Clamping groove; 604. Pushing rod;

[0051] 701. Support platform; 702. Translation driving part; 7021. Micrometer; 7022. Elastic part; 703. Sliding block. Detailed implementation manners

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only some parts related to the present invention are shown in the drawings, rather than all the structures.

[0053] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the contact between the first and second features not directly but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0055] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0056] As Figure 1 and Figure 2 shown, this embodiment provides a measuring device for bimetallic deflection. The measuring device includes a heating device 1, a clamping device 2 and a driving device 3. The heating device 1 includes two heating boxes 11 with different heating temperatures. The clamping device 2 includes a clamping base 10. A detection mechanism 21 and a bimetallic fixing unit 30 are provided on the clamping base 10. The bimetallic fixing unit 30 is used to fix the first end of the bimetal 100 to be measured and make the second end of the bimetal 100 to be measured suspended. The first end of the detection mechanism 21 is used to press against the second end of the bimetal 100 to be measured. The detection mechanism 21 is used to detect the displacement amount when the second end of the bimetal 100 to be measured bends upward along the first direction. The driving device 3 is arranged on the heating device 1. The clamping base 10 is connected to the driving device 3. The driving device 3 is used to drive the clamping device 2 to move along the first direction to place the bimetal 100 to be measured on the bimetallic fixing unit 30 in the heating box 11, or is used to drive the clamping device 2 to move along the second direction to move the clamping device 2 between the two heating boxes 11.

[0057] The measuring device for the bimetallic deflection provided in this embodiment, the heating device 1 includes two heating boxes 11, and the temperatures of the two heating boxes 11 are different. The bimetallic fixing unit 30 is used to fix the first end of the bimetallic 100 to be measured, and the second end of the bimetallic 100 to be measured is suspended. The first end of the detection mechanism 21 can press against the second end of the bimetallic 100 to be measured. The driving device 3 can drive the clamping device 2 to move in the second direction and can also drive the clamping device 2 to move in the first direction, so that the bimetallic 100 on the bimetallic fixing unit 30 is placed in different heating boxes 11, meeting the requirements of the bimetallic deflection test. The detection mechanism 21 is used to detect the displacement amount when the second end of the bimetallic 100 to be measured bends upward in the first direction in different heating boxes 11, and then obtain the deflection performance of the bimetallic 100 to be measured. The measuring device provided in this embodiment can achieve rapid measurement, without frequent heating and cooling, shortening the test cycle of the bimetallic deflection and improving the use efficiency of the device.

[0058] In some embodiments, the heating box 11 is used to place a liquid, and the liquid can be oil or water, and no specific limitation is made here. Each heating box 11 is respectively provided with a stirrer 12, and the stirrer 12 is used to stir the liquid in the heating box 11 to ensure the uniform temperature of the liquid in the heating box 11, so as to improve the accuracy of the bimetallic 100 deflection measurement to be measured. Optionally, the stirrer 12 includes a stirring motor and a stirring rod. The stirring motor is fixed on the heating device 1 and is placed outside the heating box 11. The first end of the stirring rod is connected to the stirring motor, and the second end of the stirring rod extends into the heating box 11. The stirring motor drives the stirring rod to rotate to stir the liquid in the heating box 11.

[0059] Each heating box 11 is respectively provided with a heating pipe and a temperature detection component (the heating pipe and the temperature detection component are not shown in the figure). The heating pipe is used to heat the heating box 11, and the temperature detection component is used to detect the temperature in the heating box 11. The heating temperature of the heating pipe can be adjusted according to the temperature detected by the temperature detection component, and then the temperature of heating the bimetallic 100 to be measured in the heating box 11 can be adjusted to meet the measurement requirements of the bimetallic 100 to be measured.

[0060] In some embodiments, such as Figure 2 and Figure 3As shown, the driving device 3 includes a first driving unit 31 and a second driving unit 32. The first driving unit 31 is arranged on the heating device 1, the second driving unit 32 is connected to the first driving unit 31, and the clamping base 10 is connected to the second driving unit 32. The first driving unit 31 is used to drive the second driving unit 32 to move in the second direction, so that the clamping device 2 moves between the two heating boxes 11. The second driving unit 32 is used to drive the clamping base 10 to move in the first direction, so that the bimetal to be measured 100 on the bimetal fixing unit 30 is placed in the heating box 11. The first driving unit 31 and the second driving unit 32 cooperate to make the bimetal to be measured 100 clamped on the clamping device 2 enter the heating boxes 11 with different temperatures respectively, so as to meet the measurement requirements of the deflection of the bimetal to be measured 100.

[0061] Optionally, the first driving unit 31 includes a first slide rail 311 and a first slider 312. The first slide rail 311 is arranged on the heating device 1 and extends in the second direction. The first slider 312 is slidably arranged on the first slide rail 311, and the second driving unit 32 is arranged on the first slider 312. A push handle 102 is arranged on the clamping device 2. Specifically, the push handle 102 is arranged on the clamping base 10. An operator holds the push handle 102 by hand to push the clamping device 2, so that the first slider 312 moves on the first slide rail 311 to adjust the position of the second driving unit 32 in the second direction, and makes the clamping device 2 move between the two heating boxes 11. Further optionally, the first driving unit 31 further includes a first driving member. The first driving member is connected to the first slider 312, and the first driving member is used to drive the first slider 312 to move along the first slide rail 311, realizing the automatic adjustment of the position of the clamping device 2 in the second direction. The first driving member can be a cylinder, a linear motor, a lead screw and nut structure, a synchronous belt structure or a sprocket and chain structure, which is not specifically limited herein.

[0062] The second driving unit 32 includes a mounting base 321, a second slide rail 322, a second slider 323, a lead screw, and a second driving member 324. The mounting base 321 is disposed on the second slider 323. The two ends of the lead screw are rotatably connected to the mounting base 321. The second slide rail 322 is fixedly disposed on the mounting base 321. Both the lead screw and the second slide rail 322 extend along the first direction. The second slider 323 is slidably connected to the second slide rail 322. The second slider 323 is threadedly connected to the lead screw. The clamping base 10 is connected to the second slider 323. The second driving member 324 is connected to the first end of the lead screw. The second driving member 324 drives the lead screw to rotate, causing the second slider 323 to move along the second slide rail 322, thereby driving the clamping device 2 to move along the first direction, so that the bimetal 100 to be tested on the bimetal fixing unit 30 is placed in the heating box 11. In some other implementable manners, the second driving unit 32 may be a cylinder, a linear motor, a synchronous belt structure, or a sprocket chain structure, which is not specifically limited herein. Considering the high temperature in the heating box 11 and to prevent the bimetal 100 to be tested from scalding the operator when immersed, the clamping device 2 is automatically controlled to move in the second direction.

[0063] Continue to refer to Figure 1 As shown, the bimetal deflection measuring device further includes an operation control device 4, and the operation control device 4 has a display control panel 41 and an emergency stop button 42. The emergency stop button 42 is used for the operator to operate to emergently stop the operation of the bimetal deflection measuring device. The detection mechanism 21, the driving device 3, and the stirrer 12 are respectively electrically connected to the operation control device 4. The displacement amount detected by the detection mechanism 21 when the second end of the bimetal 100 to be tested bends upward along the first direction is transmitted to the operation control device 4. Through analysis by the operation control device 4, the deflection of the bimetal 100 to be tested can be obtained and can be displayed through the display control panel 41. The operation control device 4 can also control the driving device 3 to act to realize the movement of the clamping device 2 in the first direction or the second direction to meet the measurement requirements. The operation control device 4 can also control the stirrer 12 to work to stir the liquid in the heating box 11 to ensure the uniformity of the temperature of the liquid in the heating box 11 and improve the measurement accuracy of the deflection of the bimetal 100 to be tested.

[0064] The measuring device for bimetallic deflection further includes a power supply and a temperature control unit 5, which is composed of a power cabinet 51 and a heating cabinet temperature controller 52. The power cabinet 51 supplies power to the measuring device for bimetallic deflection, and the heating cabinet temperature controller 52 is used to control the temperature in the heating cabinet 11. The heating cabinet temperature controller 52 has a temperature display 521, which is used to display the temperatures in the two heating cabinets 11. The heating pipes and the temperature detection elements are electrically connected to the heating cabinet temperature controller 52. The heating cabinet temperature controller 52 can control the heating temperature and heating duration of the heating pipes according to the temperature detected by the temperature detection elements. The user can input the heating temperature of the heating cabinet 11 on the display control panel 41. The heating cabinet temperature controller 52 is electrically connected to the operation control device 4. The heating cabinet temperature controller 52 controls the heating pipes to work and heat up to the temperature value input by the user. The temperature detection elements can detect the temperature in the heating cabinet 11 in real time. The heating cabinet temperature controller 52 also has two temperature adjustment knobs 522, which are used to manually adjust the heating temperatures of the two heating cabinets 11.

[0065] In some embodiments, as Figure 4 shown, the detection mechanism 21 includes a displacement detection unit 20 and a measuring rod unit 40. The displacement detection unit 20 and the bimetal fixing unit 30 are arranged on opposite sides of the clamping base 10. The first end of the measuring rod unit 40 is connected to the detection end of the displacement detection unit 20, and the second end passes through the clamping base 10 and is used to press against the second end of the bimetal 100 to be measured. The displacement detection unit 20 is used to detect the displacement amount when the second end of the bimetal 100 to be measured bends upward in the first direction. The bimetal fixing unit 30 is used to clamp the first end of the bimetal 100 to be measured. The first end of the measuring rod unit 40 is connected to the detection end of the displacement detection unit 20, and the second end is used to press against the second end of the bimetal 100 to be measured. When the bimetal 100 to be measured bends upward due to heat, it will drive the measuring rod unit 40 to move. The displacement detection unit 20 obtains the displacement amount when the second end of the bimetal 100 to be measured bends upward, and thus obtains the deflection of the bimetal 100 to be measured.

[0066] Optionally, a gravity block 50 is detachably mounted on the measuring rod unit 40. The gravity block 50 is used to apply a downward force to the second end of the bimetal 100 to be measured along the first direction. By setting the gravity block 50 on the measuring rod unit 40, the gravity block 50 applies a downward force to the second end of the bimetal 100 to be measured, so as to simulate the resistance suffered by the bimetal 100 to be measured during actual application. This resistance is opposite to the heat-induced bending direction of the bimetal 100 to be measured, making the test scenario more in line with the actual application scenario of the bimetal, ensuring that the bimetal during the test is subjected to forces similar to those during actual application, and thus improving the accuracy of the bimetal deflection test. The above-mentioned display control panel 41 can display the deflection value of the bimetal 100 to be measured after deformation without the gravity block 50, the deflection compensation amount of the bimetal 100 to be measured at different temperatures, the deflection compensation amount under the action of the self-weight of the measuring rod unit 40 on the bimetal 100 to be measured, etc. The user can also input the weight of the gravity block 50, the weight of the measuring rod unit 40, etc. through the display control panel 41, and then calculate the deflection of the bimetal 100 to be measured in combination with the displacement amount detected by the detection mechanism 21 when the bimetal 100 to be measured is deformed.

[0067] In some embodiments, such as Figure 5As shown, the measuring rod unit 40 includes a measuring rod 401. The measuring rod 401 includes a first rod section 4011 and a second rod section 4012. The first end of the first rod section 4011 is connected to the detection end of the displacement detection unit 20, and the second end of the first rod section 4011 is connected to the first end of the second rod section 4012. The outer diameter of the first rod section 4011 is smaller than that of the second rod section 4012, and a first boss 4013 is provided at the second end of the second rod section 4012. The gravity block 50 is provided with a through hole 501 and a through groove 502. The first end of the through groove 502 communicates with the through hole 501, and the second end of the through groove 502 penetrates through the side wall of the gravity block 50. The aperture of the through hole 501 is adapted to the rod diameter of the second rod section 4012, and the groove width of the through groove 502 is adapted to the rod diameter of the first rod section 4011. The first rod section 4011 can be inserted into the through hole 501 through the through groove 502. When the gravity block 50 moves downward along the first rod section 4011, the second rod section 4012 can pass through the through hole 501, and the gravity block 50 is placed on the first boss 4013. The first rod section 4011 can be inserted into the through hole 501 through the through groove 502, and then when the gravity block 50 moves downward, the second rod section 4012 passes through the through hole 501. The second rod section 4012 cannot pass through the through groove 502. Thus, the gravity block 50 cannot break away from the second rod section 4012 in the horizontal direction. The first boss 4013 is used to position the gravity block 50 in the vertical direction and apply gravity to the first boss 4013, so that the measuring rod unit 40 moves downward to apply a force to the second end of the bimetal 100 to be measured. This structure facilitates the installation and removal of the gravity block 50. The measurement personnel can select a gravity block 50 with an appropriate weight according to the performance of the bimetal 100 to be measured and the resistance received by the bimetal 100 in the actual application scenario, so as to improve the measurement accuracy. The gravity block 50 can be a weight. The weight is a standard part with high weight accuracy and does not require additional processing.

[0068] The measuring rod unit 40 further includes a third rod section 4015. The first end of the third rod section 4015 is detachably connected to the second end of the second rod section 4012. Specifically, the first end of the third rod section 4015 is threadedly connected to the second rod section 4012. The second end of the third rod section 4015 is used to press against the second end of the bimetal 100 to be measured. The end of the second end of the third rod section 4015 is an arc surface to reduce the contact area with the bimetal 100 to be measured and improve the measurement accuracy.

[0069] In some embodiments, such as Figure 6As shown, the displacement detection unit 20 includes a displacement detector 201 and a fixing component 202. The first end of the fixing component 202 is connected to the clamping base 10, and the displacement detector 201 is connected to the second end of the fixing component 202. The first end of the measuring rod unit 40 is elastically connected to the detection end of the displacement detector 201. The displacement detector 201 is used to detect the displacement when the second end of the bimetal 100 to be measured bends upward in the first direction. A measuring rod support 60 is provided on the fixing component 202. The measuring rod support 60 can be connected to or separated from the measuring rod unit 40. Connecting the measuring rod support 60 to the measuring rod unit 40 moves the measuring rod unit 40 upward in the first direction, and the second end of the measuring rod unit 40 is in a separated state from the second end of the bimetal 100 to be measured. When the measuring rod support 60 is separated from the measuring rod unit 40, the measuring rod unit 40 moves downward in the first direction, so that the second end of the measuring rod unit 40 presses against the second end of the bimetal 100 to be measured. When replacing or installing the bimetal 100 to be measured, the measuring rod unit 40 is moved upward away from the position where the second end of the bimetal 100 to be measured is located. The measuring rod support 60 plays a role in positioning the measuring rod unit 40 in the first direction. When the bimetal 100 to be measured is installed, the measuring rod unit 40 is moved downward to press against the bimetal 100 to be measured, which facilitates the installation and replacement of the bimetal 100 to be measured.

[0070] Optionally, a second boss 4014 is provided at the first end of the measuring rod unit 40. The detection end of the displacement detector 201 abuts against the surface of the second boss 4014, increasing the connection area between the displacement detector 201 and the measuring rod unit 40 and improving the detection accuracy of the displacement detector 201. Specifically, the second boss 4014 is provided at the first end of the first rod segment 4011.

[0071] Combined with Figure 6 and Figure 7 As shown, the measuring rod support 60 includes a support arm 601. A clamping plate 602 is connected to the support arm 601. The support arm 601 is rotatably connected to the fixing component 202. A clamping groove 603 is provided on the clamping plate 602. Rotating the support arm 601 can make the clamping groove 603 be clamped on the measuring rod unit 40. When the clamping groove 603 is clamped on the measuring rod unit 40 and the second boss 4014 is placed on the upper surface of the support arm 601, the second end of the measuring rod unit 40 is in a separated state from the second end of the bimetal 100 to be measured. In actual operation, lifting the measuring rod unit 40 in the first direction, the cooperation between the second boss 4014 and the clamping plate 602 makes the measuring rod unit 40 in a separated state from the bimetal 100 to be measured. The structure is simple and convenient to operate. The tester can rotate the support arm 601 to connect or separate the clamping plate 602 from the measuring rod unit 40. The groove wall of the clamping groove 603 matches the structure of the measuring rod unit 40, facilitating the connection or separation between the clamping plate 602 and the measuring rod unit 40.

[0072] Two positioning rings 203 are spaced apart on the fixing assembly 202 , the support arm 601 is disposed between the two positioning rings 203 , and the support arm 601 can rotate relative to the fixing assembly 202 . The two positioning rings 203 are used to limit the position of the support arm 601 installed on the fixing assembly 202 .

[0073] Optionally, the support arm 601 is connected to a lever 604 , which is arranged opposite to the clamping plate 602 . The support arm 601 can be rotated by moving the lever 604 . The support arm 601 is arranged to facilitate the operation of the measurement personnel.

[0074] In another practicable manner, the measuring rod support 60 includes a positioning pin, which is disposed on the fixing assembly 202. A positioning hole is disposed on the measuring rod unit 40. The measuring rod unit 40 is lifted in the first direction until the positioning pin can be inserted into the positioning hole, so that the second end of the measuring rod unit 40 is separated from the second end of the bimetal 100 to be measured. The positioning pin is connected to the fixing assembly 202 and has a state of being inserted into the positioning hole and a state of being separated from the positioning hole relative to the fixing assembly 202. The specific connection structure of the positioning pin and the fixing assembly 202 is not described in detail here.

[0075] Optionally, the displacement detecting member 201 is a high-precision displacement sensor.

[0076] In some embodiments, the fixing assembly 202 includes a fixing rod 2021 and a fixing block 2022, wherein the first end of the fixing rod 2021 is connected to the clamping base 10, the fixing block 2022 is connected to the second end of the fixing rod 2021, and the displacement detection member 201 is disposed on the fixing block 2022. The detection end of the displacement detection member 201 can pass through the fixing block 2022 and be connected to the measuring rod unit 40. The position of the fixing block 2022 on the fixing rod 2021 is adjustable.

[0077] The above-mentioned displacement detection unit 20 can be set in plurality, and each displacement detection unit 20 is respectively provided with a corresponding measuring rod unit 40. A plurality of bimetals 100 to be tested can be fixed on the bimetal fixing unit 30, so that the bimetals 100 to be tested correspond to the measuring rod unit 40 one by one, and the simultaneous measurement of the plurality of bimetals 100 to be tested can be realized.

[0078] like Figure 8 and Figure 9As shown, in some embodiments, the bimetal fixing unit 30 includes a first clamping plate 301, a second clamping plate 302, and a clamping plate driving assembly 303. The first clamping plate 301 is spaced apart from the clamping base 10, the first clamping plate 301 is fixedly connected to the clamping base 10 through a connecting member 304, the clamping plate driving assembly 303 is arranged on the clamping base 10, the second clamping plate 302 is connected to the clamping plate driving assembly 303, and the clamping plate driving assembly 303 is used to drive the second clamping plate 302 to move toward the first clamping plate 301 along the first direction to clamp the bimetal 100 to be tested, so as to fix the bimetal 100 to be tested, or drive the second clamping plate 302 to move away from the first clamping plate 301 along the first direction to loosen the bimetal 100 to be tested, so as to facilitate the replacement of the bimetal 100 to be tested. The bimetal fixing unit 30 has a simple structure and is convenient for testers to place or remove the bimetal 100 to be tested.

[0079] Optionally, the clamping plate driving assembly 303 includes a rotating member 3031, a connecting block 3032, and a plurality of linkage rods 3033. The first ends of the plurality of linkage rods 3033 respectively pass through the clamping base 10 and are fixedly connected to the second clamping plate 302, the second ends of the plurality of linkage rods 3033 are respectively fixedly connected to the connecting block 3032, the rotating member 3031 is placed on a side of the clamping base 10 away from the second clamping plate 302, and the first end of the rotating member 3031 is rotatably connected to the clamping base 10, the connecting block 3032 is screwed on the rotating member 3031, and the rotating member 3031 rotates to drive the connecting block 3032 to move, so as to drive the linkage rod 3033 to move along the first direction. The clamping plate driving assembly 303 can manually screw the rotating member 3031 to make the connecting block 3032 move relative to the rotating member 3031 along the first direction, thereby driving the linkage rod 3033 to move along the first direction. Manually screwing the rotating member 3031 can adjust the force of the first clamping plate 301 and the second clamping plate 302 to clamp the bimetal 100 to be tested, so as to avoid the bimetal 100 to be clamped loosely or damaged. In the first direction, the second clamping plate 302 can be arranged above the first clamping plate 301, and the second clamping plate 302 moves downward along the first direction to clamp the bimetal 100 to be tested. Alternatively, in the first direction, the second clamping plate 302 can be arranged below the first clamping plate 301, and the second clamping plate 302 moves upward along the first direction to clamp the bimetal 100 to be tested.

[0080] The clamping plate drive assembly 303 also includes an indicator 3034, and the rotating member 3031 includes a screw 30311. The first end of the screw 30311 is rotatably connected to the clamping base 10, and the second end of the screw 30311 is connected to a nut 30312. The nut 30312 is provided with a scale along the circumferential direction. The indicator 3034 points to the scale to determine the consistency of the force of the bimetal 100 to be tested being clamped, thereby improving the detection accuracy of the deflection of the bimetal 100 to be tested.

[0081] In some other feasible embodiments, the splint driving assembly 303 includes a splint driving motor, a lead screw, a nut, and a plurality of linkage rods. The two ends of the lead screw are respectively rotatably connected to the clamping base 10. The nut is screwed onto the lead screw. The splint driving motor is connected to the first end of the lead screw. The first ends of the plurality of linkage rods respectively pass through the clamping base 10 and are fixedly connected to the second splint 302. The second ends of the plurality of linkage rods are respectively fixedly connected to the nut. The lead screw is parallel to the linkage rods. The splint driving motor drives the lead screw to rotate, and the nut moves circumferentially along the lead screw, thereby driving the linkage rods to move in the first direction to clamp or loosen the bimetal 100 to be measured. This structure can adjust the clamping force of the second splint 302 and the first splint 301 for clamping the bimetal 100 to be measured by the number of turns of rotation of the splint driving motor.

[0082] Combined Figure 9 and Figure 10 As shown, in some embodiments, the second splint 302 includes a connecting plate 3021 and a clamping plate 3022. The connecting plate 3021, the clamping plate 3022, and the first splint 301 are stacked in sequence in the first direction. The first splint 301 is disposed above the clamping plate 3022. The first end of the linkage rod 3033 passes through the first splint 301 and is fixedly connected to the connecting plate 3021. The clamping plate 3022 is detachably connected to the linkage rod 3033. A positioning groove 3023 for accommodating the bimetal 100 to be measured is provided on the side of the clamping plate 3022 facing the first splint 301. When the linkage rod 3033 moves in the first direction, the connecting plate 3021 can be driven to move towards the first splint 301, thereby driving the clamping plate 3022 to move. The first splint 301 and the connecting plate 3021 clamp the clamping plate 3022 to clamp the bimetal 100 to be measured placed on the clamping plate 3022. The detachable connection between the clamping plate 3022 and the linkage rod 3033 allows the clamping plate 3022 to be replaced. The sizes of the positioning grooves 3023 on different clamping plates 3022 are different, enabling the clamping device to clamp bimetals 100 to be measured with different sizes.

[0083] Optionally, a clamping groove 3024 is recessed on one side edge of the clamping plate 3022. The number of the clamping grooves 3024 provided corresponds to the number of the linkage rods 3033. The linkage rod 3033 can be snapped into the corresponding clamping groove 3024, and the clamping plate 3022 is fixed on the linkage rod 3033.

[0084] On the side of the clamping plate 3022 where the clamping groove 3024 is provided, a guiding groove 3025 may be concavely provided. On the side of the first clamping plate 301 facing the clamping plate 3022, a guiding block 3011 is convexly provided. After the linkage rod 3033 drives the clamping plate 3022 to move towards the first clamping plate 301 in place, the guiding block 3011 is inserted into the guiding groove 3025 to further define the position of the clamping plate 3022 relative to the first clamping plate 301. Optionally, the guiding groove 3025 communicates with the clamping groove 3024, and the guiding groove 3025 and the clamping groove 3024 form a stepped groove. The guiding groove 3025 is placed on the outside, and the clamping groove 3024 and the guiding block 3011 cooperate to clamp the linkage rod 3033.

[0085] See Figure 6 and Figure 11 As shown, in some embodiments, the clamping base 10 is provided with a long hole 101 extending in the second direction, and the second end of the measuring rod unit 40 passes through the long hole 101. The clamping device 2 further includes a translation adjustment unit 70 provided on the clamping base 10. The displacement detection unit 20 is connected to the translation adjustment unit 70. The translation adjustment unit 70 is used to adjust the position of the displacement detection unit 20 relative to the clamping base 10 so that the second end of the measuring rod unit 40 approaches or moves away from the second end of the bimetal 100 to be measured in the second direction. By providing the translation adjustment unit 70, the measuring rod unit 40 can move relative to the clamping base 10 in the second direction, which is applicable to bimetals 100 to be measured with different lengths, ensuring that the measuring rod unit 40 can stably contact the bimetal 100 to be measured.

[0086] As Figure 6 , Figure 12 and Figure 13 As shown, optionally, the translation adjustment unit 70 includes a support platform 701 and a translation driving member 702. The support platform 701 is slidably connected to the clamping base 10 in the second direction. The sliding connection structure between the support platform 701 and the clamping base 10 can be a slider and rail structure, which is not specifically limited here. The displacement detection unit 20 is provided on the support platform 701. The translation driving member 702 is fixedly provided on the clamping base 10. The driving end of the translation driving member 702 is connected to the support platform 701. The translation driving member 702 is used to drive the support platform 701 to move in the second direction to adjust the position of the measuring rod unit 40 in the second direction.

[0087] On the side of the support platform 701 connected to the clamping base 10, a sliding block 703 is provided. The sliding block 703 is provided corresponding to the measuring rod unit 40 one by one. The second end of the measuring rod unit 40 sequentially passes through the support platform 701 and the sliding block 703. The sliding block 703 passes through the long hole 101, and the sliding block 703 can slide in the long hole 101.

[0088] Further optionally, the translation driving member 702 includes a micrometer 7021 and an elastic member 7022. The micrometer 7021 is fixed on the clamping base 10, and the measuring end of the micrometer 7021 abuts against the support platform 701. An elastic member 7022 is connected between the clamping base 10 and the support platform 701. The elastic member 7022 is used to move the support platform 701 away from the bimetal 100 to be measured. During use, turn the micrometer 7021 to push the measuring end of the micrometer 7021 to move the support platform 701 toward the bimetal 100 to be measured along the second direction. At this time, the elastic member 7022 is stretched, thereby adjusting the position of the measuring rod unit 40 in the second direction. And the micrometer 7021 has scales, which can accurately adjust the position of the measuring rod unit 40 to ensure that the measuring rod unit 40 can accurately press against the second end of the bimetal 100 to be measured. Turn the micrometer 7021 to move the measuring end of the micrometer 7021 away from the bimetal 100 to be measured. At this time, the support platform 701 moves away from the bimetal 100 under the action of the elastic member 7022, and the support platform 701 can always keep in contact with the measuring end of the micrometer 7021.

[0089] In another feasible embodiment, the translation driving member 702 can be a cylinder. The cylinder is connected to the support platform 701 to drive the support platform 701 to slide in the second direction, thereby adjusting the position of the measuring rod unit 40 in the second direction. Or the translation driving member 702 is a lead screw and nut structure, a gear and rack structure, etc., which are not specifically limited herein.

[0090] When using the measuring device for the bimetal deflection provided by the present application, the following steps are included:

[0091] First, lift the measuring rod unit 40 and rotate the support arm 601 to make the clamping plate 602 clamp on the measuring rod unit 40, and the second end of the measuring rod unit 40 is in a position away from the bimetal 100 to be measured.

[0092] Second, rotate the rotating member 3031 to adjust the position of the connecting plate 3021 to separate the clamping plate 3022 from the first clamping plate 301, and place the first end of the bimetal 100 to be measured in the positioning groove 3023 of the clamping plate 3022, and the second end of the bimetal 100 to be measured is suspended.

[0093] Third, rotate the rotating member 3031 in the opposite direction to adjust the position of the connecting plate 3021 to move the connecting plate 3021 toward the first clamping plate 301. The connecting plate 3021 and the first clamping plate 301 clamp the clamping plate 3022, thereby fixing the bimetal 100 to be measured.

[0094] Fourth, turn the micrometer 7021 to adjust the position of the support platform 701, thereby adjusting the position of the measuring rod unit 40 in the second direction to place the second end of the measuring rod unit 40 above the second end of the bimetal 100 to be measured.

[0095] 5. Rotate the supporting arm 601 to separate the clamping plate 602 from the measuring rod unit 40. The measuring rod unit 40 moves downward along the first direction under the action of elastic force, and the second end of the measuring rod unit 40 abuts against the second end of the bimetal 100 to be measured.

[0096] 6. Inject liquid into the heating boxes 11 so that the temperatures of the liquids in the two heating boxes 11 reach the preset temperature values respectively. At the same time, the stirrer 12 can be controlled to work to make the temperature of the liquid more uniform.

[0097] 7. Control the first driving unit 31 to work. The first driving unit 31 drives the clamping device 2 to move along the second direction and place it above the first heating box 11. Control the second driving unit 32 to drive the clamping device 2 to move along the first direction and immerse the bimetal 100 to be measured into the liquid in the first heating box 11, and maintain for the first preset time to obtain the deflection value of the bimetal 100 to be measured.

[0098] 8. Apply the gravity block 50 to the measuring rod unit 40 to obtain the deflection value of the bimetal 100 to be measured.

[0099] 9. Control the second driving unit 32 to drive the clamping device 2 to move along the first direction to move the bimetal 100 to be measured out of the first heating box 11. Control the first driving unit 31 to work. The first driving unit 31 drives the clamping device 2 to move along the second direction and place it above the second heating box 11. Control the second driving unit 32 to drive the clamping device 2 to move along the first direction and immerse the bimetal 100 to be measured into the liquid in the second heating box 11, and maintain for the second preset time to obtain the deflection value of the bimetal 100 to be measured.

[0100] 10. Apply the gravity block 50 to the measuring rod unit 40 to obtain the deflection value of the bimetal 100 to be measured.

[0101] Steps 7 to 10 can be repeatedly executed multiple times according to actual measurement requirements to improve the measurement accuracy of the deflection of the bimetal 100 to be measured.

[0102] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A bimetal deflection measuring device, characterized in that: include: A heating device (1) comprising two heating boxes (11), wherein the heating temperatures of the two heating boxes (11) are different; The clamping device (2) comprises a clamping base (10), the clamping base (10) being provided with a detection mechanism (21) and a bimetallic fixing unit (30), the bimetallic fixing unit (30) being used to fix a first end of a bimetallic element (100) to be tested and to allow a second end of the bimetallic element (100) to be suspended in the air, the first end of the detection mechanism (21) being used to press against the second end of the bimetallic element (100) to be tested, and the detection mechanism (21) being used to detect a displacement amount when the second end of the bimetallic element (100) to be tested is bent upward along a first direction; a driving device (3) disposed on the heating device (1), the clamping base (10) being connected to the driving device (3), the driving device (3) being used to drive the clamping device (2) to move along a first direction so that the bimetal to be tested (100) on the bimetal fixing unit (30) is placed in the heating box (11), or to drive the clamping device (2) to move along a second direction so that the clamping device (2) moves between two heating boxes (11); The detection mechanism (21) comprises a displacement detection unit (20) and a measuring rod unit (40), wherein the displacement detection unit (20) and the bimetal fixing unit (30) are arranged on two opposite sides of the clamping base (10), a first end of the measuring rod unit (40) is connected to a detection end of the displacement detection unit (20), and a second end passes through the clamping base (10) and is used to press against a second end of the bimetal (100) to be detected, and the displacement detection unit (20) is used to detect a displacement amount when the second end of the bimetal (100) to be detected is bent upward along a first direction; The displacement detection unit (20) comprises a displacement detection member (201) and a fixing assembly (202), wherein a first end of the fixing assembly (202) is connected to the clamping base (10), the displacement detection member (201) is connected to a second end of the fixing assembly (202), a first end of the measuring rod unit (40) is elastically connected to a detection end of the displacement detection member (201), and a measuring rod support member (60) is provided on the fixing assembly (202); The measuring rod support (60) can be connected to or separated from the measuring rod unit (40); the measuring rod unit (40) can move upward in a first direction so that the second end of the measuring rod unit (40) is separated from the second end of the bimetal (100) to be measured; the measuring rod support (60) is rotated to connect the measuring rod support (60) to the measuring rod unit (40) so that the second end of the measuring rod unit (40) is in a separated state from the second end of the bimetal (100) to be measured; the measuring rod support (60) is separated from the measuring rod unit (40), the measuring rod unit (40) moves downward in the first direction, and the second end of the measuring rod unit (40) is pressed against the second end of the bimetal (100) to be measured; The bimetal fixing unit (30) is used to fix a plurality of bimetals (100) to be tested, and the displacement detection unit (20) and the measuring rod unit (40) respectively correspond one-to-one to the bimetals (100) to be tested.

2. The bimetal deflection measuring device according to claim 1, characterized in that: The heating box (11) is used to place liquid, and each heating box (11) is respectively provided with a stirrer (12), and the stirrer (12) is used to stir the liquid in the heating box (11); and / or, A heating tube and a temperature detection component are respectively provided in each of the heating boxes (11); the heating tube is used to heat the heating box (11); and the temperature detection component is used to detect the temperature in the heating box (11).

3. The bimetal deflection measuring device according to claim 1, characterized in that: The driving device (3) comprises a first driving unit (31) and a second driving unit (32); the first driving unit (31) is arranged on the heating device (1); the second driving unit (32) is connected to the first driving unit (31); the clamping base (10) is connected to the second driving unit (32); the first driving unit (31) is used to drive the second driving unit (32) to move along a second direction so that the clamping device (2) moves between the two heating boxes (11); the second driving unit (32) is used to drive the clamping base (10) to move along a first direction so that the bimetal (100) to be tested on the bimetal fixing unit (30) is placed in the heating box (11).

4. The bimetal deflection measuring device according to claim 1, characterized in that: A gravity block (50) is detachably provided on the measuring rod unit (40), and the gravity block (50) is used to enable the measuring rod unit (40) to apply a force downward along a first direction to the second end of the bimetal (100) to be measured.

5. The bimetal deflection measuring device according to claim 4, characterized in that: The clamping base (10) is provided with an elongated hole (101) extending along the second direction, and the second end of the measuring rod unit (40) passes through the elongated hole (101); The clamping device (2) further comprises a translation adjustment unit (70) arranged on the clamping base (10), the displacement detection unit (20) being connected to the translation adjustment unit (70), and the translation adjustment unit (70) being used to adjust the position of the displacement detection unit (20) relative to the clamping base (10) so that the second end of the measuring rod unit (40) approaches or moves away from the second end of the bimetal (100) to be measured in a second direction.

6. The bimetal deflection measuring device according to claim 5, characterized in that: The translation adjustment unit (70) comprises a support platform (701) and a translation driving member (702); the support platform (701) is slidably connected to the clamping base (10) in the second direction; the displacement detection unit (20) is arranged on the support platform (701); the translation driving member (702) is fixedly arranged on the clamping base (10); a driving end of the translation driving member (702) is connected to the support platform (701); and the translation driving member (702) is used to drive the support platform (701) to move along the second direction.

7. The bimetal deflection measuring device according to claim 1, characterized in that: The bimetal fixing unit (30) comprises a first clamping plate (301), a second clamping plate (302) and a clamping plate driving assembly (303); the first clamping plate (301) is spaced apart from the clamping base (10); the first clamping plate (301) is fixedly connected to the clamping base (10) via a connecting piece (304); the clamping plate driving assembly (303) is arranged on the clamping base (10); the second clamping plate (302) is connected to the clamping plate driving assembly (303); the clamping plate driving assembly (303) is used to drive the second clamping plate (302) to move toward the first clamping plate (301) along a first direction to clamp the bimetal (100) to be tested, or to drive the second clamping plate (302) to move away from the first clamping plate (301) along the first direction to release the bimetal (100) to be tested.

8. The bimetal deflection measuring device according to claim 7, characterized in that: The clamping plate driving assembly (303) comprises a rotating member (3031), a connecting block (3032) and a plurality of linkage rods (3033). The first ends of the plurality of linkage rods (3033) respectively pass through the clamping base (10) and are fixedly connected to the second clamping plate (302). The second ends of the plurality of linkage rods (3033) are respectively fixedly connected to the connecting block (3032). The rotating member (3031) is disposed on a side of the clamping base (10) away from the second clamping plate (302), and the first end of the rotating member (3031) is rotatably connected to the clamping base (10). The connecting block (3032) is screwed onto the rotating member (3031). The rotating member (3031) is rotated to drive the connecting block (3032) to move, thereby driving the linkage rod (3033) to move along the first direction.

9. The bimetal deflection measuring device according to claim 8, characterized in that: The second clamping plate (302) comprises a connecting plate (3021) and a clamping plate (3022); the connecting plate (3021), the clamping plate (3022) and the first clamping plate (301) are stacked in sequence along a first direction; the first clamping plate (301) is arranged above the clamping plate (3022); the first end of the linkage rod (3033) passes through the first clamping plate (301) and is fixedly connected to the connecting plate (3021); the clamping plate (3022) and the linkage rod (3033) are detachably connected; and a positioning groove (3023) for accommodating the bimetal (100) to be tested is provided on a side of the clamping plate (3022) facing the first clamping plate (301).

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