A riveted movable contact bimetal and its mounting structure

Abstract

The utility model discloses a riveting type movable contact bimetallic strip and mounting structure thereof, including mounting seat, the even arrangement's clamping groove is seted up to mounting seat inner side wall, the hot bimetallic strip is all movably connected in clamping groove inner side wall, and the embedding groove is seted up to mounting seat side wall, and the reset spring is fixedly connected to embedding groove inner side wall, and the semicircle ball is fixedly connected to reset spring movable end, and the semicircle ball and the arc groove in the thermal protector shell are in harmony, the utility model is convenient for the installation and dismounting of bimetallic strip, improves the efficiency of production and maintenance, and the cooperation of reset spring and semicircle ball, arc groove and the setting of limiting groove and limiting block ensure the stable installation of mounting seat in the thermal protector shell, prevent bimetallic strip from loosening or displacement in the working process, guarantee the stability of thermal protector work.

Description

Technical Field

[0001] This utility model relates to the field of thermal protector technology, specifically a riveted moving contact bimetallic strip and its mounting structure. Background Technology

[0002] Thermal protectors, as crucial temperature protection components in circuit systems, are widely used in various electrical equipment and industrial control systems. Their performance directly affects the safe operation and lifespan of the equipment. Traditional bimetallic strip material combinations have limitations in temperature sensitivity and control accuracy, making them unsuitable for applications with high temperature control requirements. Furthermore, the connection structures between the bimetallic strip and the mounting base, and between the mounting base and the thermal protector housing, are often inadequate during installation, leading to cumbersome installation processes and a tendency for loosening and displacement, thus affecting the overall performance and stability of the thermal protector. Therefore, those skilled in the art have provided a riveted moving contact bimetallic strip and its mounting structure to address the problems mentioned in the background. Utility Model Content

[0003] The purpose of this invention is to provide a riveted moving contact bimetallic strip and its mounting structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A riveted moving contact bimetallic strip includes a thermal bimetallic strip, which is composed of a high expansion coefficient metal sheet, a low expansion coefficient metal sheet, and a moving contact. The high expansion coefficient metal sheet is riveted to the upper surface of the low expansion coefficient metal sheet, and the moving contact is fixedly connected to both the upper surface of the high expansion coefficient metal sheet and the lower surface of the low expansion coefficient metal sheet. Wiring holes for wiring are opened on the surfaces of the high expansion coefficient metal sheet and the low expansion coefficient metal sheet.

[0005] Furthermore, the high coefficient of thermal expansion metal sheet is made of brass.

[0006] Furthermore, the low coefficient of thermal expansion metal sheet is made of Invar steel.

[0007] A mounting structure for a riveted moving contact bimetallic strip includes a mounting base. The inner sidewall of the mounting base has evenly arranged slots, and the riveted moving contact bimetallic strip is movably engaged with the inner sidewall of each slot. The sidewall of the mounting base has an embedding groove, and a return spring is fixedly connected to the inner sidewall of the embedding groove. A semi-circular retaining ball is fixedly connected to the movable end of the return spring, and the semi-circular retaining ball matches the arc groove inside the thermal protector housing.

[0008] Furthermore, a limiting groove is formed on the inner sidewall of the embedding groove, and a limiting block is slidably connected to the inner sidewall of the limiting groove. The sidewall of the limiting block is fixedly connected to the sidewall of the semi-circular ball.

[0009] By adopting the above technical solution Compared with the prior art, the beneficial effects of this utility model are: 1. By using a combination of metal sheets (brass and Invar) with different coefficients of thermal expansion, and utilizing the bending deformation characteristics caused by their thermal expansion differences, it can respond sensitively to temperature changes, achieve precise temperature control, and enable the thermal protector to operate accurately at the set temperature, thereby improving the accuracy and timeliness of thermal protection.

[0010] 2. The snap-fit ​​design of the slot and the bimetallic strip in the installation structure facilitates the installation and disassembly of the bimetallic strip, improving production and maintenance efficiency. The cooperation between the return spring, the semi-circular ball, and the arc groove, as well as the setting of the limit groove and the limit block, ensures the stable installation of the mounting base in the thermal protector housing, preventing the bimetallic strip from loosening or shifting during operation, and ensuring the stability of the thermal protector's operation. Attached Figure Description

[0011] Figure 1 A schematic diagram of a riveted moving contact bimetallic strip; Figure 2 A schematic diagram of a riveted moving contact bimetallic strip and its mounting structure; Figure 3 This is a schematic diagram of the structure of a riveted moving contact bimetallic strip and its mounting structure, showing the engagement of a semi-circular retaining ball with an arc groove.

[0012] In the diagram: 1. Mounting base; 2. Slot; 3. Bimetallic strip; 301. High expansion coefficient metal strip; 302. Low expansion coefficient metal strip; 303. Moving contact; 304. Wiring hole; 4. Embedded groove; 5. Limiting groove; 6. Limiting block; 7. Semi-circular ball; 8. Return spring; 9. Arc groove. Detailed Implementation

[0013] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0014] Please see Figure 1This utility model provides an embodiment of a riveted moving contact bimetallic strip, including a thermal bimetallic strip 3. The thermal bimetallic strip 3 is composed of a high expansion coefficient metal strip 301, a low expansion coefficient metal strip 302, and a moving contact 303. The high expansion coefficient metal strip 301 is riveted to the upper surface of the low expansion coefficient metal strip 302. Moving contacts 303 are fixedly connected to both the upper surface of the high expansion coefficient metal strip 301 and the lower surface of the low expansion coefficient metal strip 302. Wiring holes 304 for wiring are opened on the surfaces of the high expansion coefficient metal strip 301 and the low expansion coefficient metal strip 302. The high expansion coefficient metal strip 301 is made of brass, and the low expansion coefficient metal strip 302 is made of Invar. The riveted moving contact bimetallic strip is composed of the high expansion coefficient metal strip 301, the low expansion coefficient metal strip 302, and the moving contact 303. When the ambient temperature changes, due to the change in temperature, the high expansion coefficient metal strip 301 and the low expansion coefficient metal strip 302... Due to the different coefficients of thermal expansion of the bimetallic strips 301 and 302, the bimetallic strip will bend and deform. When the temperature rises, the bimetallic strip with the higher coefficient of thermal expansion 301 expands more than the bimetallic strip with the lower coefficient of thermal expansion 302, and the bimetallic strip bends towards the side of the bimetallic strip with the lower coefficient of thermal expansion 302. When the temperature drops, the bimetallic strip returns to its original shape. The moving contact 303, which is fixedly connected to the upper and lower surfaces of the bimetallic strip, can realize the connection or disconnection of the circuit during the bending deformation of the bimetallic strip, thereby playing the role of temperature control and circuit protection. The wiring hole 304 facilitates the connection between the bimetallic strip and the circuit, ensuring that the current can pass smoothly through the moving contact 303. By using a combination of metal strips with different coefficients of thermal expansion (brass and Invar) and utilizing the bending deformation characteristics caused by their difference in thermal expansion, the bimetallic strip can respond sensitively to temperature changes, achieve precise temperature control, and enable the thermal protector to operate accurately at the set temperature, thereby improving the accuracy and timeliness of thermal protection.

[0015] Please see Figure 2-3This utility model provides an embodiment of a riveted moving contact bimetallic strip mounting structure, including a mounting base 1. The inner wall of the mounting base 1 has evenly arranged slots 2, each slot 2 having a movable engaging bimetallic strip. The mounting base 1 also has an embedding groove 4 on its side wall, with a return spring 8 fixedly connected to the inner wall of the embedding groove 4. A semi-circular retaining ball 7 is fixedly connected to the movable end of the return spring 8, and the semi-circular retaining ball 7 fits into an arc groove 9 inside the thermal protector housing. A limiting groove 5 is formed on the inner wall of the embedding groove 4, with a limiting block 6 slidably connected to the inner wall of the limiting groove 5. The side wall of the limiting block 6 is fixedly connected to the side wall of the semi-circular retaining ball 7. In this riveted moving contact 303 and bimetallic strip mounting structure, the bimetallic strip 3 is movably engaging the inner wall of the mounting base 1 through the slots 2, achieving initial positioning of the bimetallic strip. When the mounting base 1 is installed on the thermal protector... When the bimetallic strip is installed inside the housing, the return spring 8 embedded in the groove 4 pushes the semi-circular retaining ball 7 to engage with the arc groove 9 inside the housing of the thermal protector, thereby firmly fixing the mounting base 1 inside the housing of the thermal protector and ensuring the stability of the bimetallic strip during operation. At the same time, the cooperation between the limiting groove 5 and the limiting block 6 restricts the movement direction of the semi-circular retaining ball 7, preventing it from shifting during installation or use, and further improving the reliability of the installation structure. The snap-fit ​​design between the retaining groove 2 and the thermal bimetallic strip 3 in the installation structure facilitates the installation and disassembly of the bimetallic strip, improving the efficiency of production and maintenance. The cooperation between the return spring 8, the semi-circular retaining ball 7, and the arc groove 9, as well as the setting of the limiting groove 5 and the limiting block 6, ensures the stable installation of the mounting base 1 inside the housing of the thermal protector, preventing the bimetallic strip from loosening or shifting during operation and ensuring the stability of the thermal protector's operation.

[0016] When the ambient temperature changes, the bimetallic strip will bend and deform due to the different thermal expansion coefficients of the high-expansion-coefficient metal sheet 301 and the low-expansion-coefficient metal sheet 302. When the temperature rises, the high-expansion-coefficient metal sheet 301 expands more than the low-expansion-coefficient metal sheet 302, and the bimetallic strip bends towards the low-expansion-coefficient metal sheet 302. When the temperature drops, the bimetallic strip returns to its original shape. The moving contact 303, which is fixedly connected to the upper and lower surfaces of the bimetallic strip, can realize the connection or disconnection of the circuit during the bending and deformation of the bimetallic strip, thereby playing the role of temperature control and circuit protection. When the mounting base 1 is installed in the thermal protector housing, the reset spring 8 embedded in the groove 4 pushes the semi-circular retaining ball 7 to match the arc groove 9 in the thermal protector housing, thereby firmly fixing the mounting base 1 in the thermal protector housing, ensuring the stability of the bimetallic strip during operation. At the same time, the cooperation between the limiting groove 5 and the limiting block 6 restricts the movement direction of the semi-circular retaining ball 7, preventing it from shifting during installation or use, and further improving the reliability of the installation structure.

[0017] By combining metal sheets with different coefficients of thermal expansion (brass and Invar), and utilizing the bending deformation characteristics caused by their thermal expansion differences, the device can respond sensitively to temperature changes, achieving precise temperature control. This ensures that the thermal protector operates accurately at the set temperature, improving the accuracy and timeliness of thermal protection. The snap-fit ​​design of the slot 2 and the bimetallic strip 3 in the mounting structure facilitates the installation and disassembly of the bimetallic strip, improving production and maintenance efficiency. The cooperation between the return spring 8, the semi-circular retaining ball 7, and the arc groove 9, as well as the setting of the limiting groove 5 and the limiting block 6, ensures the stable installation of the mounting base 1 within the thermal protector housing, preventing the bimetallic strip from loosening or shifting during operation and ensuring the stability of the thermal protector's operation.

[0018] This specification describes the embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A riveted moving contact bimetallic strip, characterized in that, The device includes a bimetallic strip (3), which is composed of a high expansion coefficient metal strip (301), a low expansion coefficient metal strip (302), and a moving contact (303). The high expansion coefficient metal strip (301) is riveted to the upper surface of the low expansion coefficient metal strip (302). The moving contact (303) is fixedly connected to both the upper surface of the high expansion coefficient metal strip (301) and the lower surface of the low expansion coefficient metal strip (302). Wiring holes (304) for wiring are opened on the surfaces of the high expansion coefficient metal strip (301) and the low expansion coefficient metal strip (302).

2. The riveted moving contact bimetallic strip according to claim 1, characterized in that, The high expansion coefficient metal sheet (301) is made of brass.

3. The riveted moving contact bimetallic strip according to claim 1, characterized in that, The low expansion coefficient metal sheet (302) is made of Invar steel.

4. A mounting structure for a riveted moving contact bimetallic strip as described in any one of claims 1 to 3, characterized in that, The device includes a mounting base (1), on which the inner wall is provided with evenly arranged slots (2), and the inner wall of each slot (2) is movably engaged with the riveted moving contact bimetallic strip. The side wall of the mounting base (1) is provided with an embedding groove (4), and the inner wall of the embedding groove (4) is fixedly connected with a return spring (8). The movable end of the return spring (8) is fixedly connected with a semi-circular retaining ball (7), and the semi-circular retaining ball (7) matches the arc groove (9) inside the thermal protector housing.

5. The mounting structure of the riveted moving contact bimetallic strip according to claim 4, characterized in that, The inner wall of the embedded groove (4) is provided with a limiting groove (5), and the inner wall of the limiting groove (5) is slidably connected to a limiting block (6). The side wall of the limiting block (6) is fixedly connected to the side wall of the semi-circular ball (7).

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