Clamping device for bimetallic deflection measurement

Abstract

The present invention belongs to the technical field of bimetal performance testing, and specifically discloses a clamping device for measuring the deflection of a bimetal. The clamping device for measuring the deflection of a bimetal provided by the present invention is used to measure the deflection of a bimetal. When the bimetal to be tested is heated and bends upward, it will drive the measuring rod unit to move. The displacement detection unit obtains the displacement amount when the second end of the bimetal to be tested bends upward, and thus obtains the deflection of the bimetal to be tested. A gravity block is provided on the measuring rod unit, and the gravity block causes the measuring rod unit to apply a downward force to the second end of the bimetal to be tested to simulate the resistance suffered by the bimetal to be tested during actual application. This resistance is opposite to the direction of the heat-induced bending of the bimetal to be tested, and the test scenario is more in line with the actual application scenario of the bimetal, ensuring that the bimetal during testing is subjected to forces similar to those during actual application, thereby improving the accuracy of bimetal deflection testing.

Description

Technical Field

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

[0002] Bimetal elements are used as drive mechanisms in products such as circuit breakers, thermal overload relays, and AC motor starters to achieve the function of long-delay action protection characteristics. A 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 operates due to "heat", pushing the operating mechanism of the product to switch the contact state and achieve the purpose of protecting the circuit.

[0003] The performance detection of bimetal elements, such as the deflection of bimetal elements, is usually tested by the cantilever beam method. A closed loop is composed of a bimetal specimen, a specimen holder, a displacement measuring rod, and an electronic contact indicator. According to the basic characteristic that the curvature of the bimetal changes with temperature, the bimetal specimen and the displacement measuring rod are used as switches of the closed circuit to measure the displacement change of the free end of the bimetal specimen, and then the deflection of the bimetal specimen is obtained. At present, in the deflection detection method of bimetal elements, the bimetal specimen is in a non-loaded state, while in actual use, the bimetal is affected by the resistance of the product operating mechanism. Therefore, in practical applications, what is required is that the deflection of the bimetal under resistance meets the requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a clamping device for measuring the deflection of a bimetal, making the test scenario more in line with the actual application scenario of the bimetal, ensuring that the bimetal during testing is approximately the same as the bimetal during actual application in terms of force, and thus improving the accuracy of bimetal deflection testing.

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

[0006] A clamping device for measuring the deflection of a bimetal, comprising:

[0007] A clamping base;

[0008] A displacement detection unit, arranged on one side of the clamping base;

[0009] A bimetal fixing unit, arranged on the other side of the clamping base, the bimetal fixing unit being used to clamp the first end of the bimetal to be tested and making the second end of the bimetal to be tested suspended;

[0010] A measuring rod unit, with its first end connected to the detection end of the displacement detection unit, and its second end passing through the clamping base and being used to press against the second end of the bimetal to be measured. A gravity block is detachably mounted on the measuring rod unit, and the gravity block is used to apply a downward force along a first direction to the second end of the bimetal to be measured by the measuring rod unit. The displacement detection unit is used to detect the displacement amount when the second end of the bimetal to be measured bends upward along the first direction.

[0011] As an alternative technical solution of the clamping device for the above bimetal deflection measurement, the measuring rod unit includes a measuring rod, and the measuring rod includes a first rod section and a second rod section. The first end of the first rod section is connected to the detection end of the displacement detection unit, the second end of the first rod section is connected to the first end of the second rod section, the outer diameter of the first rod section is smaller than that of the second rod section, and a first boss is provided at the second end of the second rod section;

[0012] The gravity block is provided with a through hole and a through groove. The first end of the through groove communicates with the through hole, and the second end of the through groove penetrates the side wall of the gravity block. The aperture of the through hole is adapted to the rod diameter of the second rod section, the groove width of the through groove is adapted to the rod diameter of the first rod section. The first rod section can be inserted into the through hole through the through groove. When the gravity block moves downward along the first rod section, the second rod section can pass through the through hole, and the gravity block is placed on the first boss.

[0013] As an alternative technical solution of the clamping device for the above bimetal deflection measurement, the displacement detection unit includes a displacement detector and a fixing component. The first end of the fixing component is connected to the clamping base, the displacement detector is connected to the second end of the fixing component, and the first end of the measuring rod unit is elastically connected to the detection end of the displacement detector. A measuring rod support is provided on the fixing component;

[0014] The measuring rod support can be connected to or separated from the measuring rod unit. When the measuring rod support is connected to the measuring rod unit, the measuring rod unit moves upward along 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 along the first direction, and the second end of the measuring rod unit presses against the second end of the bimetal to be measured.

[0015] As an alternative technical solution of the clamping device for the above bimetal deflection measurement, a second boss is provided at the first end of the measuring rod unit, and the detection end of the displacement detector abuts against the surface of the second boss;

[0016] The measuring rod support member includes a support arm, which is connected to a clamping plate. The support arm is rotatably connected to the fixed component, and a clamping groove is provided on the clamping plate. Rotating the support arm can enable the clamping groove to be clamped on the measuring rod unit. When the clamping groove is clamped on the measuring rod unit and the second boss is placed on the upper surface of the support arm, the second end of the measuring rod unit and the second end of the bimetal to be measured are in a separated state.

[0017] As an optional technical solution for the above-mentioned clamping device for measuring the deflection of the bimetal, 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 apart from the clamping base, the first clamping plate is fixedly connected to the clamping base via a connecting piece, the clamping plate driving assembly is arranged on the clamping base, the second clamping plate is connected to the clamping plate driving assembly, and the clamping plate driving assembly is used to drive the second clamping plate to move toward the first clamping plate along a first direction to clamp the bimetal to be measured, or drive the second clamping plate to move away from the first clamping plate along the first direction to release the bimetal to be measured.

[0018] As an optional technical solution for the above-mentioned bimetallic deflection measurement clamping 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.

[0019] As an optional technical solution for the above-mentioned bimetallic deflection measurement clamping device, the clamping plate drive assembly also includes an indicator, the rotating member includes a screw, the first end of the screw is rotatably connected to the clamping base, the second end of the screw is connected to a nut, the nut is provided with a scale along the circumferential direction, and the indicator points to the scale.

[0020] As an optional technical solution for the above-mentioned clamping device for measuring the bimetal deflection, 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.

[0021] As an alternative technical solution of the clamping device for bimetallic deflection measurement described above, 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;

[0022] The clamping device for bimetallic deflection measurement 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 bimetallic to be measured in the second direction.

[0023] As an alternative technical solution of the clamping device for bimetallic deflection measurement described above, 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 arranged on the support platform. The translation driving member is fixedly arranged 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.

[0024] As an alternative technical solution of the clamping device for bimetallic deflection measurement described above, the translation driving member includes a micrometer and an elastic member. The micrometer is fixed on the clamping base, and the measuring end of the micrometer abuts against the support platform. The elastic member is connected between the clamping base and the support platform, and the elastic member is used to move the support platform in a direction away from the bimetallic to be measured.

[0025] Advantages of the present invention:

[0026] The clamping device for bimetallic deflection measurement provided by the present invention is used to measure the deflection of a bimetallic. The bimetallic fixing unit is used to clamp the first end of the bimetallic to be measured. The first end of the measuring rod unit is connected to the detection end of the displacement detection unit, and the second end is used to press against the second end of the bimetallic to be measured. When the bimetallic to be measured is heated and bent upward, it will drive the measuring rod unit to move. The displacement detection unit obtains the displacement amount when the second end of the bimetallic to be measured bends upward, and then obtains the deflection of the bimetallic to be measured. A gravity block is arranged on the measuring rod unit, and the gravity block makes the measuring rod unit apply a downward force to the second end of the bimetallic to be measured to simulate the resistance suffered by the bimetallic in actual application. This resistance is opposite to the direction of the thermal bending of the bimetallic to be measured, and the test scenario is more in line with the actual application scenario of the bimetallic, ensuring that the bimetallic during testing is similar to the bimetallic in actual application in terms of force, and thus improving the accuracy of bimetallic deflection testing. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the clamping device for bimetallic deflection measurement provided by an embodiment of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the measuring rod unit provided by an embodiment of the present invention;

[0029] Figure 3 It is a partial cross-sectional view of the connection between the measuring rod unit and the translation adjustment unit and the clamping base provided by an embodiment of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the measuring rod support provided by an embodiment of the present invention;

[0031] Figure 5 It is a first partial cross-sectional view of the bimetal fixing unit provided by an embodiment of the present invention;

[0032] Figure 6 It is a second partial cross-sectional view of the bimetal fixing unit provided by an embodiment of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the clamping plate provided by an embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the clamping base provided by an embodiment of the present invention;

[0035] Figure 9 It is a first axonometric view of the translation adjustment unit provided by an embodiment of the present invention;

[0036] Figure 10 It is a second axonometric view of the translation adjustment unit provided by an embodiment of the present invention.

[0037] In the figure:

[0038] 100, the bimetal to be measured;

[0039] 10, clamping base; 20, displacement detection unit; 30, bimetal fixing unit; 40, measuring rod unit; 50, gravity block; 60, measuring rod support; 70, translation adjustment unit;

[0040] 101, long slot;

[0041] 201, displacement detection piece; 202, fixing component; 2021, fixing rod; 2022, fixing block; 203, positioning ring;

[0042] 301, first clamping plate; 3011, guiding block; 302, second clamping plate; 3021, connecting plate; 3022, clamping plate; 3023, positioning groove; 3024, clamping groove; 3025, guiding groove; 303, clamping plate driving component; 3031, rotating piece; 30311, screw rod; 30312, nut; 3032, connecting block; 3033, linkage rod; 3034, indicating piece; 304, connecting piece;

[0043] 401. Measuring rod; 4011. First rod segment; 4012. Second rod segment; 4013. First boss; 4014. Second boss; 4015. Third rod segment;

[0044] 501. Through hole; 502. Through slot;

[0045] 601. Support arm; 602. Clamping plate; 603. Clamping slot; 604. Pushing rod;

[0046] 701. Support platform; 702. Translation driving member; 7021. Micrometer; 7022. Elastic member; 703. Sliding block. Detailed implementation manner

[0047] 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 parts related to the present invention rather than all structures are shown in the accompanying drawings.

[0048] 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 integrated; 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 communication inside two elements or the interaction relationship between two elements. 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.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0050] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood 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.

[0051] As Figure 1 shown, this embodiment provides a clamping device for measuring the deflection of a bimetal. The clamping device includes a clamping base 10, a displacement detection unit 20, a bimetal fixing unit 30, and a measuring rod unit 40. The displacement detection unit 20 is disposed on one side of the clamping base 10, and the bimetal fixing unit 30 is disposed on the other side of the clamping base 10. The bimetal fixing unit 30 is used to clamp the first end of the bimetal 100 to be measured, and the second end of the bimetal 100 to be measured is suspended. 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. A gravity block 50 is detachably mounted on the measuring rod unit 40. The gravity block 50 is used to apply a force downward in the first direction by the measuring rod unit 40 to 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.

[0052] The clamping device for measuring the deflection of a bimetal provided in this embodiment is used to measure the deflection of the bimetal 100 to be measured. 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 is heated and bends upward, 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 then obtains the deflection of the bimetal 100 to be measured. A gravity block 50 is provided on the measuring rod unit 40. The gravity block 50 causes the measuring rod unit 40 to apply a force downward to the second end of the bimetal 100 to be measured to simulate the resistance suffered by the bimetal 100 to be measured during actual application. This resistance is opposite to the direction of thermal bending of the bimetal 100 to be measured. The test scenario is more in line with the actual application scenario of the bimetal, ensuring that the bimetal during the test is similar to the bimetal during actual application in terms of force, and thus improving the accuracy of the bimetal deflection test.

[0053] In some embodiments, such as Figure 2As 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. 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. 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. The second end of the through groove 502 penetrates 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. 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 down 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. Then, when the gravity block 50 moves down, 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 be separated 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 down 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 measuring 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.

[0054] 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.

[0055] In some embodiments, such as Figure 3As 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.

[0056] 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.

[0057] Combined with Figure 3 and Figure 4 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 second boss 4014 and the clamping plate 602 cooperate to make 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 of the clamping plate 602 from the measuring rod unit 40.

[0058] 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 .

[0059] 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.

[0060] 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.

[0061] Optionally, the displacement detecting member 201 is a high-precision displacement sensor.

[0062] 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.

[0063] 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.

[0064] like Figure 5 and Figure 6As 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.

[0065] 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.

[0066] 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.

[0067] In some other implementable ways, 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 release 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 the splint driving motor.

[0068] Combined Figure 6 and Figure 7 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. One 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.

[0069] Optionally, a clamping groove 3024 is recessed on one side edge of the clamping plate 3022. The number of the provided clamping grooves 3024 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 to the linkage rod 3033.

[0070] 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 limit 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.

[0071] See Figure 3 and Figure 8 As shown in the figures, 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 for bimetal deflection measurement 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, and 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.

[0072] Such as Figure 3 、 Figure 9 and Figure 10 As shown in the figures, 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-rail structure, which is not specifically limited herein. 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, and 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.

[0073] 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.

[0074] 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 so that the measuring end of the micrometer 7021 pushes the support platform 701 to move towards 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 so that the measuring end of the micrometer 7021 moves 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 be in contact with the measuring end of the micrometer 7021.

[0075] In another implementable manner, 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 rack and pinion structure, etc., which are not specifically limited herein.

[0076] When using the clamping device provided by the present invention, the following steps are included:

[0077] First, lift the measuring rod unit 40 and rotate the support arm 601 so that the clamping plate 602 is clamped on the measuring rod unit 40, and the second end of the measuring rod unit 40 is at a position away from the bimetal 100 to be measured.

[0078] Second, rotate the rotating member 3031 to adjust the position of the connecting plate 3021, so that the clamping plate 3022 is separated 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.

[0079] Third, rotate the rotating member 3031 in the opposite direction to adjust the position of the connecting plate 3021, so that the connecting plate 3021 moves towards the first clamping plate 301, and the connecting plate 3021 and the first clamping plate 301 clamp the clamping plate 3022, thereby fixing the bimetal 100 to be measured.

[0080] 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, so that the second end of the measuring rod unit 40 is placed above the second end of the bimetal 100 to be measured.

[0081] V. 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 the elastic force, and the second end of the measuring rod unit 40 abuts against the second end of the bimetal 100 to be measured.

[0082] VI. Apply the gravity block 50 to the measuring rod unit 40. The measuring rod unit 40 applies a force downward along the first direction to the second end of the bimetal 100 to be measured, simulating the resistance suffered by the bimetal 100 to be measured during actual application.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting 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 within the protection scope of the claims of the present invention.

Claims

1. A clamping device for measuring bimetallic deflection, characterized in that: include: A clamping base (10); A displacement detection unit (20) is arranged on one side of the clamping base (10); A bimetallic fixing unit (30) is arranged on the other side of the clamping base (10), and the bimetallic fixing unit (30) is used to clamp the first end of the bimetallic (100) to be tested and to leave the second end of the bimetallic (100) to be tested suspended in the air; a measuring rod unit (40), wherein a first end 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; 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 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 the first direction; 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 bimetal deflection measuring clamping device 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; 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 bimetallic deflection measurement clamping device according to claim 1, characterized in that: The measuring rod unit (40) comprises a measuring rod (401), the measuring rod (401) comprising a first rod segment (4011) and a second rod segment (4012), the first end of the first rod segment (4011) being connected to the detection end of the displacement detection unit (20), the second end of the first rod segment (4011) being connected to the first end of the second rod segment (4012), the outer diameter of the first rod segment (4011) being smaller than that of the second rod segment (4012), and the second end of the second rod segment (4012) being provided with a first boss (4013); The gravity block (50) is provided with a through hole (501) and a through groove (502); a first end of the through groove (502) is communicated with the through hole (501); a second end of the through groove (502) passes through a side wall of the gravity block (50); a hole diameter of the through hole (501) matches a rod diameter of the second rod segment (4012); a groove width of the through groove (502) matches a rod diameter of the first rod segment (4011); the first rod segment (4011) can be inserted into the through hole (501) through the through groove (502); the gravity block (50) moves downward along the first rod segment (4011) so that the second rod segment (4012) passes through the through hole (501); and the gravity block (50) is placed on the first boss (4013).

3. The bimetallic deflection measurement clamping device according to claim 1, characterized in that: A second boss (4014) is provided at the first end of the measuring rod unit (40), and a detection end of the displacement detection member (201) abuts against a surface of the second boss (4014); The measuring rod support member (60) comprises a supporting arm (601), the supporting arm (601) being connected to a clamping plate (602), the supporting arm (601) being rotatably connected to the fixing assembly (202), the clamping plate (602) being provided with a clamping groove (603), the supporting arm (601) being rotated so that the clamping groove (603) can 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 supporting arm (601), the second end of the measuring rod unit (40) and the second end of the bimetal (100) to be measured are in a separated state.

4. The bimetal deflection measurement clamping 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.

5. The bimetal deflection measuring clamping device according to claim 4, 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.

6. The bimetal deflection measurement clamping device according to claim 5, characterized in that: The clamping plate driving assembly (303) further comprises an indicator (3034), the rotating member (3031) comprises a screw (30311), a first end of the screw (30311) is rotatably connected to the clamping base (10), a second end of the screw (30311) is connected to a nut (30312), a scale is provided on the nut (30312) along a circumferential direction, and the indicator (3034) points to the scale.

7. The bimetal deflection measurement clamping device according to claim 5, 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).

8. The bimetal deflection measurement clamping device according to claim 1, 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.

9. The bimetal deflection measurement clamping device according to claim 8, characterized in that: The translation driving member (702) comprises a micrometer (7021) and an elastic member (7022); the micrometer (7021) is fixed on the clamping base (10), and a measuring end of the micrometer (7021) is in contact with the support platform (701); the elastic member (7022) is connected between the clamping base (10) and the support platform (701), and the elastic member (7022) is used to move the support platform (701) in a direction away from the bimetal (100) to be measured.

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