Clamping device for bimetal deflection measurement

Abstract

The invention belongs to the technical field of bimetal performance testing, and particularly discloses a clamping device for bimetal deflection measurement. The clamping device for bimetal deflection measurement is used for measuring the deflection of bimetal, the measuring rod unit can be driven to move when the to-be-measured bimetal is heated and bent upwards, the displacement detection unit obtains the displacement when the second end of the to-be-measured bimetal is bent upwards, and then the deflection of the to-be-measured bimetal is obtained. The gravity block is arranged on the measuring rod unit, the gravity block enables the measuring rod unit to apply force downwards to the second end of the to-be-measured bimetal so as to simulate the resistance borne by the to-be-measured bimetal in actual application, the resistance is opposite to the heated bending direction of the to-be-measured bimetal, the test scene better conforms to the actual application scene of the bimetal, and the test accuracy is improved. It is guaranteed that the stress of the bimetal in the testing process is similar to that of the bimetal in the practical application process, and then the precision of bimetal deflection testing is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bimetallic performance testing, and in particular to a clamping device for bimetallic deflection measurement. Background Art

[0002] Bimetallic 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. Bimetallic elements are made by heating and rolling two alloys with large differences in linear expansion coefficients. When heated, the bimetallic element bends from the high expansion layer (active layer) to the low expansion layer (passive layer). When the current is too large, the element moves due to "heat", pushing the product's action mechanism to switch the contact state, thereby achieving the purpose of protecting the circuit.

[0003] The performance test of bimetallic components, such as the deflection of bimetallic components, is usually tested by the cantilever beam method. A closed circuit is composed of a bimetallic specimen, a specimen holder, a displacement measuring rod and an electronic contact indicator. According to the basic characteristics of the curvature of the bimetallic changing with temperature, the bimetallic 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 bimetallic specimen, and then the deflection of the bimetallic specimen is obtained. At present, in the deflection detection method of bimetallic components, the bimetallic specimen is in a stress-free state, while the actual bimetallic is affected by the resistance of the product's action mechanism during use. Therefore, in practical applications, what is required is that the deflection of the bimetallic when subjected to resistance must meet the requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a clamping device for measuring bimetal deflection, so that the test scenario is more in line with the actual application scenario of the bimetal, ensuring that the force on the bimetal during the test is similar to that on the bimetal during actual application, thereby improving the accuracy of the bimetal deflection test.

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

[0006] Bimetallic deflection measurement fixture, comprising:

[0007] Clamping base;

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

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

[0010] A measuring rod unit, wherein the first end is connected to the detection end of the displacement detection unit, and the second end passes through the clamping base and is used to press against the second end of the bimetal to be measured. A gravity block is detachably provided on the measuring rod unit, and the gravity block is used to enable the measuring rod unit to apply a force downward along a first direction to the second end of the bimetal to be measured, and the displacement detection unit is used to detect the displacement of the second end of the bimetal to be measured when it bends upward along the first direction.

[0011] As an optional technical solution of the above-mentioned clamping device for bimetallic deflection measurement, the measuring rod unit includes a measuring rod, the measuring rod includes a first rod segment and a second rod segment, the first end of the first rod segment is connected to the detection end of the displacement detection unit, the second end of the first rod segment is connected to the first end of the second rod segment, the outer diameter of the first rod segment is smaller than that of the second rod segment, and the second end of the second rod segment is provided with a first boss;

[0012] The gravity block is provided with a through hole and a through slot, the first end of the through slot is connected to the through hole, the second end of the through slot passes through the side wall of the gravity block, the aperture of the through hole is adapted to the rod diameter of the second rod segment, the slot width of the through slot is adapted to the rod diameter of the first rod segment, the first rod segment can be inserted into the through hole through the through slot, the gravity block moves downward along the first rod segment to enable the second rod segment to pass through the through hole, and the gravity block is placed on the first boss.

[0013] As an optional technical solution of the above-mentioned clamping device for bimetallic deflection measurement, the displacement detection unit includes a displacement detection member and a fixing assembly, the first end of the fixing assembly is connected to the clamping base, the displacement detection member is connected to the second end of the fixing assembly, the first end of the measuring rod unit is elastically connected to the detection end of the displacement detection member, and the fixing assembly is provided with a measuring rod support;

[0014] The measuring rod support member can be connected to or separated from the measuring rod unit. The measuring rod support member is connected to the measuring rod unit so that the measuring rod unit moves up in a 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. The measuring rod support member is separated from the measuring rod unit, and the measuring rod unit moves downward in the first direction, and the second end of the measuring rod unit is pressed against the second end of the bimetal to be measured.

[0015] As an optional technical solution of the above-mentioned clamping device for measuring bimetallic deflection, a second boss is provided at the first end of the measuring rod unit, and the detection end of the displacement detection member 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 optional technical solution of the above-mentioned clamping device for measuring bimetal deflection, the clamping base is provided with an elongated hole extending along the second direction, and the second end of the measuring rod unit passes through the elongated hole;

[0022] The clamping device for measuring the bimetal deflection also includes a translation adjustment unit arranged 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.

[0023] As an optional technical solution for the above-mentioned bimetallic deflection measurement clamping device, the translation adjustment unit includes a support table and a translation driving member, the support table is slidably connected to the clamping base in the second direction, the displacement detection unit is arranged on the support table, the translation driving member is fixedly arranged on the clamping base, the driving end of the translation driving member is connected to the support table, and the translation driving member is used to drive the support table to move along the second direction.

[0024] As an optional technical solution for the above-mentioned clamping device for measuring the deflection of the bimetal, the translation drive component includes a micrometer and an elastic component, the micrometer is fixed on the clamping base, and the measuring end of the micrometer is abutted against the support platform, the elastic component is connected between the clamping base and the support platform, and the elastic component is used to move the support platform away from the bimetal to be measured.

[0025] Beneficial effects of the present invention:

[0026] The clamping device for measuring the deflection of a bimetal provided by the present invention is used for measuring the deflection of a bimetal; a bimetal fixing unit is used for clamping a first end of a bimetal to be measured; a first end of a measuring rod unit is connected to a detection end of a displacement detection unit; a second end is used for pressing a second end of the bimetal to be measured; when the bimetal to be measured is heated and bent upward, the measuring rod unit is driven to move; the displacement detection unit obtains the displacement when the second end of the bimetal to be measured is bent upward, and further obtains the deflection of the bimetal to be measured; a gravity block is arranged on the measuring rod unit, and the gravity block enables the measuring rod unit to apply a force downward to the second end of the bimetal to be measured, so as to simulate the resistance to which the bimetal to be measured is subjected in actual application; the resistance is opposite to the direction of the heating and bending of the bimetal to be measured; the test scenario is more in line with the actual application scenario of the bimetal, so as to ensure that the force on the bimetal during the test is similar to that on the bimetal during the actual application, and further improve the accuracy of the bimetal deflection test. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 is a schematic structural diagram of a 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, the translation adjustment unit and the clamping base provided by an embodiment of the present invention;

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

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

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

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

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

[0035] Fig. 9 is a first isometric view of a translation adjustment unit provided by an embodiment of the present invention;

[0036] Fig.10 It is a second isometric view of the translation adjustment unit provided in an embodiment of the present invention.

[0037] In the figure:

[0038] 100. Bimetal to be tested;

[0039] 10. Clamping base; 20. Displacement detection unit; 30. Bimetallic fixing unit; 40. Measuring rod unit; 50. Gravity block; 60. Measuring rod support; 70. Translation adjustment unit;

[0040] 101, long hole;

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

[0042] 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 member; 30311, screw rod; 30312, nut; 3032, connecting block; 3033, linkage rod; 3034, indicator; 304, connecting member;

[0043] 401, measuring rod; 4011, first rod section; 4012, second rod section; 4013, first boss; 4014, second boss; 4015, third rod section;

[0044] 501, through hole; 502, through slot;

[0045] 601, support arm; 602, clamping plate; 603, clamping slot; 604, lever;

[0046] 701, support table; 702, translation drive member; 7021, micrometer; 7022, elastic member; 703, sliding block. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease 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 specified 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 connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] like Figure 1 As shown, this embodiment provides a clamping device for measuring the deflection of a bimetal, and 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 arranged on one side of the clamping base 10, and the bimetal fixing unit 30 is arranged 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. The measuring rod unit 40 is detachably provided with a gravity block 50, and the gravity block 50 is used to make the measuring rod unit 40 apply a force downward along the first direction to the second end of the bimetal 100 to be measured, and the displacement detection unit 20 is used to detect the displacement amount when the second end of the bimetal 100 to be measured is bent upward along the first direction.

[0052] The clamping device for measuring the deflection of the bimetal 100 to be tested provided in the present embodiment is used to measure the deflection of the bimetal 100 to be tested. The bimetal fixing unit 30 is used to clamp the first end of the bimetal 100 to be tested. 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 the second end of the bimetal 100 to be tested. When the bimetal 100 to be tested is heated and bent upward, the measuring rod unit 40 will be driven to move. The displacement detection unit 20 obtains the displacement when the second end of the bimetal 100 to be tested is bent upward, and then obtains the deflection of the bimetal 100 to be tested. A gravity block 50 is arranged on the measuring rod unit 40. The gravity block 50 enables the measuring rod unit 40 to apply a force downward to the second end of the bimetal 100 to be tested, so as to simulate the resistance of the bimetal 100 to be tested in actual application. The resistance is opposite to the direction of the heating and bending of the bimetal 100 to be tested. The test scenario is more in line with the actual application scenario of the bimetal, ensuring that the force of the bimetal during the test is similar to that of the bimetal during the actual application, thereby improving the accuracy of the bimetal deflection test.

[0053] In some embodiments, Figure 2As shown, the measuring rod unit 40 includes a measuring rod 401, and the measuring rod 401 includes a first rod segment 4011 and a second rod segment 4012. The first end of the first rod segment 4011 is connected to the detection end of the displacement detection unit 20, and the second end of the first rod segment 4011 is connected to the first end of the second rod segment 4012. The outer diameter of the first rod segment 4011 is smaller than that of the second rod segment 4012, and the second end of the second rod segment 4012 is provided with a first boss 4013. The gravity block 50 is provided with a through hole 501 and a through groove 502. The first end of the through groove 502 is connected to the through hole 501, and the second end of the through groove 502 passes 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 segment 4012, and the groove width of the through groove 502 is adapted to the 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 to enable the second rod segment 4012 to 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 slot 502, and then the gravity block 50 moves down to allow the second rod section 4012 to pass through the through hole 501. The second rod section 4012 cannot pass through the through slot 502, and 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 to apply gravity to the first boss 4013, so that the measuring rod unit 40 moves down to apply 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 of appropriate weight according to the performance of the bimetal 100 to be measured and the resistance encountered by the bimetal 100 to be measured in actual application scenarios, so as to improve the measurement accuracy. The gravity block 50 can be a weight, which is a standard part with high weight accuracy and no additional processing is required.

[0054] The measuring rod unit 40 also includes a third rod segment 4015, and the first end of the third rod segment 4015 is detachably connected to the second end of the second rod segment 4012. Specifically, the first end of the third rod segment 4015 is threadedly connected to the second rod segment 4012. The second end of the third rod segment 4015 is used to press against the second end of the bimetal 100 to be measured. The second end of the third rod segment 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, Figure 3As shown, the displacement detection unit 20 includes a displacement detection member 201 and a fixing assembly 202, wherein the first end of the fixing assembly 202 is connected to the clamping base 10, and the displacement detection member 201 is connected to the second end of the fixing assembly 202. The first end of the measuring rod unit 40 is elastically connected to the detection end of the displacement detection member 201, and the displacement detection member 201 is used to detect the displacement when the second end of the bimetal 100 to be tested is bent upward along the first direction. A measuring rod support member 60 is provided on the fixing assembly 202. The measuring rod support member 60 can be connected or separated from the measuring rod unit 40. The measuring rod support member 60 is connected to the measuring rod unit 40 so that the measuring rod unit 40 moves up along 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 tested. The measuring rod support member 60 is separated from the measuring rod unit 40, and the measuring rod unit 40 moves down along 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 tested. When replacing or installing the bimetal 100 to be tested, the measuring rod unit 40 is moved upward away from the position where the second end of the bimetal 100 to be tested is located, and 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 tested is installed, the measuring rod unit 40 is moved downward to press against the bimetal 100 to be tested, which facilitates the installation and replacement of the bimetal 100 to be tested.

[0056] Optionally, the first end of the measuring rod unit 40 is provided with a second boss 4014, and the detection end of the displacement detection member 201 abuts against the surface of the second boss 4014, thereby increasing the connection area between the displacement detection member 201 and the measuring rod unit 40 and improving the detection accuracy of the displacement detection member 201. Specifically, the second boss 4014 is provided at the first end of the first rod segment 4011.

[0057] Combination Figure 3 and Figure 4 As shown, the measuring rod support 60 includes a support arm 601, the support arm 601 is connected with a clamping plate 602, the support arm 601 is rotatably connected with the fixing assembly 202, and a clamping groove 603 is provided on the clamping plate 602. Rotating the support arm 601 can make the clamping groove 603 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 tested. In actual operation, the measuring rod unit 40 is lifted in the first direction, and the second boss 4014 and the clamping plate 602 cooperate to make the measuring rod unit 40 separate from the bimetal 100 to be tested. The structure is simple and easy to operate. The tester can realize the connection or separation of the clamping plate 602 and the measuring rod unit 40 by rotating the support arm 601. The groove wall of the snap-in groove 603 matches the structure of the measuring rod unit 40 , so as to facilitate the connection or separation of the snap-in plate 602 and 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 practicable embodiments, the splint drive assembly 303 includes a splint drive motor, a screw rod, a nut and a plurality of linkage rods, the two ends of the screw rod are respectively rotatably connected to the clamping base 10, the nut is screwed to the screw rod, the splint drive motor is connected to the first end of the screw rod, 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, and the screw rod is parallel to the linkage rod. The splint drive motor drives the screw rod to rotate, the nut moves along the circumference of the screw rod, and then drives the linkage rod to move along the first direction to clamp or loosen the bimetal 100 to be tested. This structure can adjust the clamping force of the second splint 302 and the first splint 301 to clamp the bimetal 100 to be tested by the number of turns of the splint drive motor.

[0068] Combination Figure 6 and Figure 7 As shown, in some embodiments, the second clamping plate 302 includes 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 the first direction. The first clamping plate 301 is arranged above the clamping plate 3022. One 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. The clamping plate 3022 is provided with a positioning groove 3023 for accommodating the bimetal 100 to be tested on one side of the clamping plate 3022 facing the first clamping plate 301. The linkage rod 3033 moves along the first direction, so that the connecting plate 3021 can move toward the first clamping plate 301, thereby driving the clamping plate 3022 to move. The first clamping plate 301 and the connecting plate 3021 clamp the clamping plate 3022 to clamp the bimetal 100 to be tested placed on the clamping plate 3022. The clamping plate 3022 is detachably connected to the linkage rod 3033 , and the clamping plate 3022 can be replaced. The sizes of the positioning grooves 3023 on different clamping plates 3022 are different, so that the clamping device can clamp bimetals 100 to be tested of different sizes.

[0069] Optionally, a clamping groove 3024 is recessed on one side of the clamping plate 3022 , and the number of the clamping grooves 3024 corresponds to the number of the linkage rods 3033 . The linkage rods 3033 can be snapped into the corresponding clamping grooves 3024 , and the clamping plate 3022 is fixed on the linkage rods 3033 .

[0070] The side of the clamping plate 3022 provided with the clamping groove 3024 may also be concavely provided with a guide groove 3025, and the first clamping plate 301 is convexly provided with a guide block 3011 on the side facing the clamping plate 3022. After the linkage rod 3033 drives the clamping plate 3022 to move to the first clamping plate 301, the guide block 3011 is inserted into the guide groove 3025 to further limit the position of the clamping plate 3022 relative to the first clamping plate 301. Optionally, the guide groove 3025 is connected with the clamping groove 3024, and the guide groove 3025 and the clamping groove 3024 form a stepped groove, the guide groove 3025 is placed on the outside, and the clamping groove 3024 and the guide block 3011 cooperate with the clamping linkage rod 3033.

[0071] See also Figure 3 and Figure 8 As shown, in some embodiments, 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 for measuring the deflection of the bimetal also includes a translation adjustment unit 70 arranged on the clamping base 10, and 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 is close to or away from the second end of the bimetal 100 to be measured in the second direction. The translation adjustment unit 70 is provided so that the measuring rod unit 40 can move relative to the clamping base 10 along the second direction, which is suitable for bimetals 100 to be measured of different lengths, and ensures that the measuring rod unit 40 can stably contact the bimetal 100 to be measured.

[0072] like Figure 3 , Fig. 9 and Fig.10 As shown, optionally, the translation adjustment unit 70 includes a support platform 701 and a translation driving member 702, and 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 here. The displacement detection unit 20 is arranged on the support platform 701, and the translation driving member 702 is fixedly arranged on the clamping base 10. The 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 to adjust the position of the measuring rod unit 40 in the second direction.

[0073] A sliding block 703 is provided on one side where the support platform 701 is connected to the clamping base 10. The sliding block 703 is arranged one-to-one corresponding to the measuring rod unit 40. The second end of the measuring rod unit 40 is penetrated by the support platform 701 and the sliding block 703 in sequence. The sliding block 703 is penetrated by a 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 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 away from the bimetal 100 to be measured. When in use, the micrometer 7021 is screwed so that the measuring end of the micrometer 7021 pushes the support platform 701 to move along the second direction toward the bimetal 100 to be measured, at which 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 a scale, which can accurately adjust the position of the measuring rod unit 40, ensuring that the measuring rod unit 40 can accurately press against the second end of the bimetal 100 to be measured. The micrometer 7021 is screwed to move the measuring end of the micrometer 7021 in a direction away from the bimetal 100 to be measured. At this time, the support platform 701 moves away from the bimetal 100 to be measured under the action of the elastic member 7022, and the support platform 701 can always maintain abutment with the measuring end of the micrometer 7021.

[0075] In another practicable manner, the translation driving member 702 may be a cylinder connected to the support platform 701, driving the support platform 701 to slide in the second direction, thereby adjusting the position of the measuring rod unit 40 in the second direction. Alternatively, the translation driving member 702 may be a screw nut structure, a gear rack structure, etc., which are not specifically limited here.

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

[0077] 1. Lift the measuring rod unit 40 and rotate the support arm 601 to make the clamping plate 602 clamped on the measuring rod unit 40 , so that the second end of the measuring rod unit 40 is far away from the bimetal 100 to be measured.

[0078] 2. 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 , place the first end of the bimetal 100 to be tested in the positioning groove 3023 of the clamping plate 3022 , and leave the second end of the bimetal 100 to be tested suspended.

[0079] 3. 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 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 tested.

[0080] Fourth, screw the micrometer 7021 to adjust the position of the support platform 701, and then adjust 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] Fifth, the support arm 601 is rotated 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] 6. Apply the gravity block 50 to the measuring rod unit 40, and the measuring rod unit 40 applies force downward along the first direction to the second end of the bimetal 100 to be tested, so as to simulate the resistance encountered by the bimetal 100 to be tested in actual application.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in 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 the 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 the displacement amount when the second end of the bimetal (100) to be detected is bent upward along the first direction.

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: 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 support (60) is connected to the measuring rod unit (40) so that the measuring rod unit (40) moves up in a 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; the measuring rod support (60) is separated from the measuring rod unit (40), the measuring rod unit (40) moves down 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.

4. The bimetal deflection measurement clamping device according to claim 3, 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.

5. 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.

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

7. The bimetallic deflection measuring clamping device according to claim 6, 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.

8. The bimetal deflection measurement clamping device according to claim 6, 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).

9. The bimetallic deflection measuring clamping device according to any one of claims 1 to 8, 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 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.

10. The bimetal deflection measuring clamping device according to claim 9, 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.

11. The bimetal deflection measuring clamping device according to claim 10, 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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