Bimetallic strip detection device for circuit breaker and circuit breaker production system

Abstract

The utility model provides a kind of bimetallic strip detection equipment and circuit breaker production system for circuit breaker.The bimetallic strip detection equipment for circuit breaker includes: a conveying part, the conveying part is used to convey bimetallic strip to detection position;A detection part, the detection part includes a detection piece, a lifting drive mechanism and an encoder, the detection piece rotatably with encoder connection, the encoder is arranged on lifting drive mechanism, the lifting drive mechanism drives the encoder and the detection piece moves, to make the detection piece and the bimetallic strip of detection position cooperation, the encoder detects the deflection angle of detection piece, to determine the offset of bimetallic strip.The bimetallic strip detection equipment for circuit breaker can quickly detect bimetallic strip.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a bimetallic strip testing device for circuit breakers, and a circuit breaker production system. Background Technology

[0002] Existing circuit breaker structures include one or more bimetallic strips (also known as elastic elements). For example, in some examples, there are three bimetallic strips. Therefore, during circuit breaker manufacturing, the positions of the three bimetallic strips at different locations need to be inspected to confirm whether their positions exceed tolerance ranges. If tolerances are detected, the positions of the bimetallic strips need to be adjusted to ensure the reliable quality of the manufactured circuit breakers. Current technologies commonly use manual inspection, which is inefficient, labor-intensive, and inaccurate. Manual adjustments are also inefficient and difficult to meet the stringent production process requirements on-site. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a bimetallic strip testing device and a circuit breaker production system for circuit breakers, thereby resolving at least one of the aforementioned issues.

[0004] According to a first aspect of the present invention, a bimetallic strip detection device for a circuit breaker is provided, comprising: a conveying unit for conveying the bimetallic strip of the circuit breaker to a detection position; and a detection unit including a detection element, a lifting drive mechanism, and an encoder, wherein the detection element is rotatably connected to the encoder, the encoder is disposed on the lifting drive mechanism, the lifting drive mechanism drives the encoder and the detection element to move so that the detection element engages with the bimetallic strip at the detection position, and the encoder detects the deflection angle of the detection element to determine the offset of the bimetallic strip.

[0005] Optionally, the testing piece is provided with a receiving groove, and when the testing piece is engaged with the bimetallic strip, at least a portion of the bimetallic strip is embedded in the receiving groove.

[0006] Optionally, the conveying unit includes: a first track, the first track including a first track groove for moving the bimetallic strip assembly to be tested, the detection position being located within the first track groove; and a first pushing mechanism, the first pushing mechanism being disposed corresponding to the first track and pushing the bimetallic strip assembly to be tested to the detection position.

[0007] Optionally, the conveying unit further includes: a second track, the second track being provided with a second track groove for the bimetallic strip assembly to be tested to move; and a second pushing mechanism, the second pushing mechanism being located at the outlet of the second track groove, and pushing the bimetallic strip assembly to be tested located at the outlet of the second track groove to the feeding position corresponding to the first pushing mechanism, wherein the pushing direction of the first pushing mechanism and the pushing direction of the second pushing mechanism are perpendicular to each other.

[0008] Optionally, the testing unit also includes a first mounting base with a through hole for the bimetallic strip assembly to be tested to pass through.

[0009] Optionally, the lifting drive mechanism includes a lifting cylinder and a second mounting base. The lifting cylinder is mounted on the first mounting base, and the second mounting base is connected to the lifting cylinder and moves under the drive of the lifting cylinder. The encoder is mounted on the second mounting base. The encoder includes an encoder shaft, and a detection element is mounted on the encoder shaft and can drive the encoder shaft to rotate.

[0010] Optionally, the detection unit also includes two adjustment components, with the detection element located between the two adjustment components. The adjustment components are used to apply a force to the detection element to adjust the position of the bimetallic strip.

[0011] Optionally, the adjustment assembly includes an adjustment drive motor, an adjustment transmission mechanism, and an adjustment swing block. The adjustment drive motor is mounted on the second mounting base and connected to the adjustment transmission mechanism. The adjustment swing block is rotatably mounted on the second mounting base and swings under the drive of the adjustment transmission mechanism to apply a force to the detection element.

[0012] Optionally, the adjusting pendulum includes an adjusting end for applying force to the test piece and a pressing end for cooperating with the adjusting transmission mechanism. The adjusting transmission mechanism includes a transmission screw and a transmission slider. The transmission screw is connected to the adjusting drive motor, and the transmission slider is threadedly connected to the transmission screw. The adjusting drive motor drives the transmission screw to rotate, thereby moving the transmission slider and pressing the pressing end of the adjusting pendulum, causing the adjusting pendulum to swing, and the adjusting end applies force to the test piece.

[0013] According to a second aspect of this application, a circuit breaker manufacturing system is provided, which includes the above-described bimetallic strip testing equipment for circuit breakers.

[0014] The conveying unit of the bimetallic strip detection device according to this embodiment can transport the processed bimetallic strip to the detection position for inspection. During inspection, the lifting drive mechanism drives the encoder and the detection component connected to the encoder to move downwards to engage with the bimetallic strip at the detection position. Because the detection component is connected to the encoder, the encoder can record the angle of deflection during the engagement of the detection component and the bimetallic strip. For example, under normal conditions, the bimetallic strip is in a vertical position, and the detection component can engage with the bimetallic strip without deflection during its downward movement. At this time, the value recorded by the encoder is the reference value. When the bimetallic strip shifts to the left or right and is no longer in a vertical position, the detection component needs to rotate by an angle, and the value collected by the encoder will increase or decrease accordingly, thereby determining the angle of rotation of the detection component and the amount of offset of the bimetallic strip. This detection device can achieve fast, efficient, and accurate detection without manual measurement, reducing labor intensity. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the bimetallic strip assembly of the circuit breaker according to an embodiment of the present utility model;

[0016] Figure 2 This is a first-view perspective three-dimensional structural diagram of a bimetallic strip detection device for a circuit breaker provided in an embodiment of this utility model;

[0017] Figure 3 This is a partial three-dimensional structural diagram from a second perspective of a bimetallic strip detection device for a circuit breaker provided in an embodiment of this utility model;

[0018] Figure 4 This is a partial three-dimensional cross-sectional view of a bimetallic strip detection device for a circuit breaker provided in this embodiment of the present invention.

[0019] Figure 5 This is a partial three-dimensional cross-sectional view of the fourth perspective of a bimetallic strip detection device for a circuit breaker provided in this embodiment of the present invention;

[0020] List of reference numerals in the attached diagram:

[0021] 11. Housing; 32. Lifting drive mechanism

[0022] 12. Bimetallic strip 321. Lifting cylinder

[0023] 20. Conveying unit 321. Lifting cylinder

[0024] 21. First pushing mechanism; 322. Second mounting base

[0025] 211. First push motor; 323. Guide rod

[0026] 212. Gears; 33. Inspection parts

[0027] 213. Rack and pinion structure; 341. Adjustment of drive motor.

[0028] 22. First track 3421. Transmission screw

[0029] 23. Second pushing mechanism 3422. Transmission slider

[0030] 24. Second track 343. Adjust the pendulum block

[0031] 31. Encoder; 35. First mounting bracket Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of the present utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0033] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0034] To keep the drawings concise, only the parts relevant to this application are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, components with the same structure or function in some figures are only schematically depicted, or only one or more are labeled. Moreover, the accompanying drawings in this application are only for illustrating and understanding the embodiments of this application and are not intended to limit the scope of this application; they are not necessarily drawn to scale.

[0035] In this patent application, nouns and pronouns relating to people are not limited to specific genders.

[0036] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the positional relationship between related parts, rather than to define their absolute positions.

[0037] In this article, "first," "second," etc., are used only to distinguish them from each other, and do not indicate their importance or order.

[0038] In this paper, terms such as “parallel” and “perpendicular” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0039] The orientations or positional relationships indicated in the description of this application are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] Before explaining the structure and working principle of the bimetallic strip testing equipment for circuit breakers, we will first briefly describe the structure of the bimetallic strip assembly of the circuit breaker, such as... Figure 1 As shown, the bimetallic strip assembly includes a housing 11 and multiple bimetallic strips 12 (three are shown in the figure) disposed within the housing 11. The bimetallic strips 12 are elastic elements with a certain deformation capacity, which results in different bimetallic strips 12 being positioned differently within the housing 11. To ensure the quality and reliability of the circuit breaker, it is necessary to ensure that the positions of all bimetallic strips 12 are within the allowable tolerance range. Therefore, it is necessary to measure the positions of the bimetallic strips 12. If the position of a bimetallic strip 12 exceeds the allowable tolerance range, the bimetallic strip 12 needs to be adjusted.

[0041] like Figures 2 to 5 As shown, this utility model provides a bimetallic strip detection device for circuit breakers, which can automatically detect the position of the bimetallic strip 12 to improve detection efficiency, ensure detection accuracy, and reduce labor intensity. The bimetallic strip detection device for circuit breakers includes a conveying section 20 and a detection section. The conveying section 20 is used to convey the bimetallic strip 12 to the detection position. The detection section includes a detection element 33, a lifting drive mechanism 32, and an encoder 31. The detection element 33 is rotatably connected to the encoder 31, and the encoder 31 is mounted on the lifting drive mechanism 32. The lifting drive mechanism 32 drives the encoder 31 and the detection element 33 to move, so that the detection element 33 engages with the bimetallic strip 12 at the detection position. The encoder 31 detects the deflection angle of the detection element 33 to determine the offset of the bimetallic strip 12.

[0042] The conveying unit 20 of the bimetallic strip 12 detection device can transport the processed bimetallic strip 12 to the detection position for inspection. During inspection, the lifting drive mechanism 32 drives the encoder 31 and the detection element 33 connected to the encoder 31 to move downwards to engage with the bimetallic strip 12 at the detection position. Because the detection element 33 is connected to the encoder 31, the encoder 31 can record the angle of deflection during the engagement of the detection element 33 and the bimetallic strip 12. For example, under normal conditions, the bimetallic strip 12 is in a vertical position, and the detection element 33 can engage with the bimetallic strip 12 without deflection during its downward movement. At this time, the value recorded by the encoder 31 is the reference value. When the bimetallic strip 12 shifts to the left or right and is no longer in a vertical position, the detection element 33 needs to rotate by an angle, and the value collected by the encoder 31 will increase or decrease accordingly. Thus, the angle of rotation of the detection element 33 can be determined, and the offset of the bimetallic strip 12 can be determined. This detection device can achieve fast, efficient, and accurate detection without manual measurement, reducing labor intensity.

[0043] See Figure 2 The conveying unit 20 includes a first track 22 and a first pushing mechanism 21. The first track 22 includes a first track groove for moving the bimetallic strip assembly to be tested, and the detection position is located in the first track groove. The first pushing mechanism 21 is set corresponding to the first track 22 and pushes the bimetallic strip assembly to the detection position.

[0044] For example, the first track 22 can be fixedly installed on the base. In order to better position the bimetallic strip assembly to be tested, the width (length in the X direction) of the first track groove is the same as the width of the housing 11 of the bimetallic strip assembly. In this way, positioning can be achieved through the cooperation between the inner wall of the first track groove and the outer wall of the housing 11 of the bimetallic strip assembly, so as to avoid detection errors caused by the different positions of the bimetallic strip assembly in the first track groove.

[0045] In this embodiment, the first pushing mechanism 21 is positioned in the Y direction corresponding to the first track 22. The movement of the first pushing mechanism 21 pushes the bimetallic strip assembly, which is in the loading position, from the inlet of the first track 22 into the first track groove. In some examples, the first pushing mechanism 21 includes a rack and pinion structure 213, a first pushing motor 211, and a gear 212, such as... Figure 2 As shown, the rack structure 213 is movably mounted on the base along the Y direction. A push plate is provided at the front end of the rack structure 213, which is used to push the bimetallic strip assembly to move. A gear 212 is provided on the first push motor 211, which meshes with the rack structure 213. The first push motor 211 drives the gear 212 to rotate, so that the rack structure 213 and the push plate reciprocate along the Y direction.

[0046] To ensure accurate control, a first position sensor and a second position sensor are installed on the base. When the first position sensor detects that the rack structure 213 has moved into position, it can send a signal to cause the first push motor 211 to rotate in the opposite direction or stop rotating. When the rack structure 213 moves in the opposite direction and is detected by the second position sensor, it can send a signal to cause the first push motor 211 to rotate in the opposite direction or stop rotating.

[0047] Optionally, to facilitate the output of the bimetallic strip assembly to the loading position, the conveying unit 20 further includes a second track 24 and a second pushing mechanism 23. The second track 24 is also provided with a second track groove for the bimetallic strip assembly to be tested to move. The second pushing mechanism 23 is located at the outlet of the second track groove and pushes the bimetallic strip assembly to be tested located at the outlet of the second track groove to the loading position corresponding to the first pushing mechanism 21. The pushing direction of the first pushing mechanism 21 and the pushing direction of the second pushing mechanism 23 are perpendicular to each other.

[0048] Reference Figure 2 The second track 24 is fixedly mounted on the base. The extension direction of the second track groove of the second track 24 is parallel to the pushing direction of the first pushing mechanism 21 (the Y direction in this embodiment). The bimetallic strip assembly to be tested moves along the second track groove. When it reaches the outlet of the second track groove, the second pushing mechanism 23 pushes it out of the second track groove to the loading position. The second pushing mechanism 23 includes a pushing cylinder that extends and retracts in the X direction. The moving section of the pushing cylinder is connected to an L-shaped pushing plate. The extension of the pushing cylinder pushes the bimetallic strip assembly to move. This can automatically push the bimetallic strip assembly to be tested to the detection position. Moreover, this method has a compact structure and high reliability. In particular, the positioning accuracy of the first pushing mechanism 21, which uses a motor-driven gear 212 rack, is higher, ensuring that the position of the bimetallic strip assembly after being pushed is accurate, thereby ensuring the reliability of the detection.

[0049] Of course, in other embodiments, the first pushing mechanism 21 and the second pushing mechanism 23 may be of other structures. For example, the first pushing mechanism 21 may be a cylinder, or the second pushing mechanism 23 may be a motor in conjunction with a worm gear. There are no restrictions on this.

[0050] Reference Figure 3 In this embodiment, the detection unit further includes a first mounting base 35, which has a through hole for the bimetallic strip assembly to be tested to pass through. The first mounting base 35 can be used to support the detection component 33, the lifting drive mechanism 32, and the encoder 31, etc. At the same time, by providing a through hole, the bimetallic strip assembly can pass through, so as to ensure that the bimetallic strip 12 to be tested can be moved from the rear end to the front end of the detection unit, thereby facilitating the detection.

[0051] Reference Figure 4 In this embodiment, the lifting drive mechanism 32 includes a lifting cylinder 321 and a second mounting base 322. The lifting cylinder 321 is mounted on the first mounting base 35, and the second mounting base 322 is connected to the lifting cylinder 321 and moves under the drive of the lifting cylinder 321. The encoder 31 is mounted on the second mounting base 322. The encoder 31 includes an encoding shaft, and the detection element 33 is mounted on the encoding shaft and can drive the encoding shaft to rotate.

[0052] For example, a guide rod 323 is provided on the first mounting base 35, and a first support plate is provided on the upper end of the guide rod 323. A lifting cylinder 321 is fixed on the first support plate, and a connecting block is fixedly connected to the moving end of the lifting cylinder 321. The connecting block is fixedly connected to the second mounting base 322, and the second mounting base 322 is sleeved on the guide rod 323. In this way, the extension and retraction of the lifting cylinder 321 can drive the second mounting base 322 to move relative to the first mounting base 35 in the Z direction (that is, the up and down direction shown in the figure), thereby driving the encoder 31 and the detection element 33 on the second mounting base 322 to move.

[0053] Reference Figure 5 The detection element 33 is provided with a receiving groove. When the detection element 33 is engaged with the bimetallic strip 12, at least part of the bimetallic strip 12 is embedded in the receiving groove. Thus, during the test, the detection element 33 moves downward, and the bimetallic strip 12 gradually embeds into the receiving groove. If the bimetallic strip 12 bends and deforms, deviating from the vertical position, it will cause the detection element 33 to rotate, thereby making the value output by the encoder 31 different from the value when it is in the vertical position, thus detecting the current offset of the bimetallic strip 12.

[0054] For example, after the bimetallic strip assembly to be tested reaches the detection position, the second mounting base 322 drives the encoder 31 and the detection element 33 to descend. One of the bimetallic strips 12 in the bimetallic strip assembly is inserted into the receiving groove of the detection element 33. The encoder 31 reads the current position value of the bimetallic strip 12 (the default initial position value is 4000 and the deviation range is ±5). If the current value is greater than 4005, it is determined that the bimetallic strip 12 is offset to the right (right side in the X direction). If the current value is less than 3995, it is determined that the bimetallic strip 12 is offset to the left (left side in the X direction).

[0055] Preferably, to facilitate the mating of the bimetallic strip 12 with the receiving groove of the detection element 33, the end of the detection element 33 (i.e., the lower end shown in the figure) is an arc structure to form a trumpet-shaped opening, which facilitates mating with the bimetallic strip 12. The receiving groove penetrates the detection element 33 in the Y direction, which can increase the deformation capability of the detection element 33.

[0056] Optionally, in order to facilitate the adjustment of the bimetallic strip 12 when the offset of the bimetallic strip 12 exceeds the error range and improve the product pass rate, the inspection unit also includes two adjustment components. The inspection element 33 is located between the two adjustment components. The adjustment components are used to apply force to the inspection element 33 to adjust the position of the bimetallic strip 12.

[0057] For example, the adjustment assembly includes an adjustment drive motor 341, an adjustment transmission mechanism, and an adjustment swing block 343. The adjustment drive motor 341 is mounted on the second mounting base 322 and connected to the adjustment transmission mechanism. The adjustment swing block 343 is rotatably mounted on the second mounting base 322 and swings under the drive of the adjustment transmission mechanism to apply a force to the detection element 33. Thus, if the bimetallic strip 12 is determined to be to the left based on the detection value of the encoder 31, the adjustment drive motor 341 on the left side is controlled to move, thereby causing the adjustment drive mechanism on the left side to drive the adjustment swing block 343 to move, applying an over-right force to the detection element 33, driving the detection element 33 and the bimetallic strip 12 to move to the right. After adjustment, the position of the bimetallic strip 12 can be detected again. If it is within the error range, the next bimetallic strip 12 in the bimetallic strip assembly can be detected. If the bimetallic strip 12 is still outside the error range, the adjustment assembly can be controlled again to adjust the bimetallic strip 12 based on the detection value of the encoder 31, until the adjustment is repeated a set number of times (e.g., 3 times) and it is still unqualified, then the bimetallic strip 12 is determined to be unqualified.

[0058] The conversion of the current encoder 31's detection value into the real-time distance that the drive motor 341 needs to adjust (denoted as the adjustment value) can be achieved as follows: Adjustment value = (Reference value + Calculated value + Correction value). The reference value is a fixed value measured based on the deviation of the current encoder 31's detection value; the reference value varies depending on the deviation range. The calculated value is the interpolation of the current encoder 31's detection value and the set value (such as the aforementioned 4000) multiplied by the converted value of the encoder 31 and motor positions. The correction value is the elastic coefficient of the bimetallic strip 12 multiplied by the calculated value. If the first adjustment fails, the difference needs to be added for the second and third adjustments; the difference is a fixed value.

[0059] In this embodiment, the adjusting pendulum 343 includes an adjusting end for applying force to the detection element 33 and a pressing end for cooperating with the adjusting transmission mechanism. The adjusting transmission mechanism includes a transmission screw 3421 and a transmission slider 3422. The transmission screw 3421 is connected to the adjusting drive motor 341, and the transmission slider 3422 is threadedly connected to the transmission screw 3421. The adjusting drive motor 341 drives the transmission screw 3421 to rotate, thereby moving the transmission slider 3422 and pressing the pressing end of the adjusting pendulum 343, causing the adjusting pendulum 343 to swing, and the adjusting end applies force to the detection element 33.

[0060] The bimetallic strip testing equipment for this circuit breaker can effectively test and adjust the bimetallic strip 12, perfectly solving the problems of difficulty in adjusting the elastic bimetallic strip 12 and insufficient positional consistency after adjustment, thus ensuring product quality. Utilizing an adjustment algorithm and a cleverly designed adjustment mechanism, 100% testing accuracy is achieved.

[0061] According to another aspect of this application, a circuit breaker manufacturing system is provided, which includes the aforementioned bimetallic strip testing equipment for circuit breakers. This circuit breaker manufacturing system can quickly and reliably test the bimetallic strip 12, thereby improving the reliability of the circuit breaker.

[0062] It should be noted that not all steps and modules in the above processes and system structure diagrams are mandatory; some steps or modules can be omitted as needed. The execution order of each step is not fixed and can be adjusted as required. The system structure described in the above embodiments can be a physical structure or a logical structure. That is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or they may be jointly implemented by certain components in multiple independent devices.

[0063] In the above embodiments, the hardware modules can be implemented mechanically or electrically. For example, a hardware module may include permanent dedicated circuitry or logic (such as a dedicated processor, FPGA, or ASIC) to perform the corresponding operations. The hardware module may also include programmable logic or circuitry (such as a general-purpose processor or other programmable processor), which can be temporarily configured by software to perform the corresponding operations. The specific implementation method (mechanical, dedicated permanent circuitry, or temporarily configured circuitry) can be determined based on cost and time considerations.

[0064] The present invention has been shown and described in detail above with reference to the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art will know that more embodiments of the present invention can be obtained by combining the code review methods in the different embodiments. These embodiments are also within the protection scope of the present invention.

Claims

1. A bimetallic strip testing device for circuit breakers, characterized in that, include: A conveying unit (20) is provided for conveying the bimetallic strip (12) of the circuit breaker to the detection position; as well as A detection unit includes a detection element (33), a lifting drive mechanism (32), and an encoder (31). The detection element (33) is rotatably connected to the encoder (31). The encoder (31) is mounted on the lifting drive mechanism (32). The lifting drive mechanism (32) drives the encoder (31) and the detection element (33) to move so that the detection element (33) engages with the bimetallic strip (12) at the detection position. The encoder (31) detects the deflection angle of the detection element (33) to determine the offset of the bimetallic strip (12).

2. The bimetallic strip testing device for circuit breakers according to claim 1, characterized in that, The detection element (33) is provided with a receiving groove. When the detection element (33) is engaged with the bimetallic strip (12), at least a portion of the bimetallic strip (12) is embedded in the receiving groove.

3. The bimetallic strip testing device for circuit breakers according to claim 1, characterized in that, The conveying unit (20) includes: A first track (22), the first track (22) including a first track groove for moving a bimetallic sheet assembly to be tested, the detection position being located within the first track groove; and A first pushing mechanism (21) is provided corresponding to the first track (22) and pushes the bimetallic strip assembly to be tested to the detection position.

4. The bimetallic strip testing device for circuit breakers according to claim 3, characterized in that, The conveying unit (20) also includes: A second track (24), the second track (24) further provided with a second track groove for moving the bimetallic strip assembly under test; and A second pushing mechanism (23) is located at the outlet of the second track groove and pushes the bimetallic strip assembly to be tested located at the outlet of the second track groove to the loading position corresponding to the first pushing mechanism (21). The pushing direction of the first pushing mechanism (21) and the pushing direction of the second pushing mechanism (23) are perpendicular to each other.

5. The bimetallic strip testing device for circuit breakers according to claim 3 or 4, characterized in that, The detection unit also includes a first mounting base (35), which has a through hole for the bimetallic strip assembly to be tested to pass through.

6. The bimetallic strip testing device for circuit breakers according to claim 5, characterized in that, The lifting drive mechanism (32) includes a lifting cylinder (321) and a second mounting base (322). The lifting cylinder (321) is mounted on the first mounting base (35). The second mounting base (322) is connected to the lifting cylinder (321) and moves under the drive of the lifting cylinder (321). The encoder (31) is mounted on the second mounting base (322). The encoder (31) includes an encoding shaft. The detection element (33) is mounted on the encoding shaft and can drive the encoding shaft to rotate.

7. The bimetallic strip testing device for circuit breakers according to claim 6, characterized in that, The detection unit also includes two adjustment components, with the detection element (33) located between the two adjustment components. The adjustment components are used to apply a force to the detection element (33) to adjust the position of the bimetallic strip (12).

8. The bimetallic strip testing device for circuit breakers according to claim 7, characterized in that, The adjustment assembly includes an adjustment drive motor (341), an adjustment transmission mechanism, and an adjustment swing block (343). The adjustment drive motor (341) is mounted on the second mounting base (322) and connected to the adjustment transmission mechanism. The adjustment swing block (343) is rotatably mounted on the second mounting base (322) and swings under the drive of the adjustment transmission mechanism to apply a force to the detection element (33).

9. The bimetallic strip testing device for circuit breakers according to claim 8, characterized in that, The adjusting swing block (343) includes an adjusting end for applying force to the detection element (33) and a pressing end for cooperating with the adjusting transmission mechanism. The adjusting transmission mechanism includes a transmission screw (3421) and a transmission slider (3422). The transmission screw (3421) is connected to the adjusting drive motor (341), and the transmission slider (3422) is threadedly connected to the transmission screw (3421). The adjusting drive motor (341) drives the transmission screw (3421) to rotate, thereby moving the transmission slider (3422) and pressing the pressing end of the adjusting swing block (343), causing the adjusting swing block (343) to swing. The adjusting end applies force to the detection element (33).

10. A circuit breaker production system, characterized in that, The bimetallic strip testing device for circuit breakers includes any one of claims 1-9.

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