Bimetallic strip

Abstract

A bimetallic strip relates to the technical field of temperature control and comprises a square bimetallic strip body, the square bimetallic strip body is in a cambered surface shape, four corners of the square bimetallic strip body are cut corners, after the cut corners are formed, linear cut corner edges are formed on the four corners of the square bimetallic strip body, the linear edges are in a linear shape or an arc shape, and the square bimetallic strip body is in a rectangular shape. And a convex reinforcing rib is arranged on the square bimetallic strip body perpendicular to the edge of the cut corner and directly reaches the edge of the cut corner. Compared with the prior art, the electric heating wire disc has the advantages of high manufacturing efficiency, easiness in fixing the shape of the electric heating wire disc, high production efficiency and low cost.

Description

Technical Field

[0001] This utility model relates to the field of temperature control technology, and in particular to bimetallic strips. Background Technology

[0002] In the snap-action thermostat industry, circular metal discs (or simply discs) are generally used. Circular discs have stable performance, and when the temperature snaps up to the set temperature, the circular discs can be stably locked in the thermostat's slot, ensuring stable deformation during the snap-action and thus guaranteeing stable temperature detection. However, since the circular metal discs are manufactured by stamping on bimetallic strips, more than 45% of the material is scrapped, which wastes materials and significantly increases manufacturing costs.

[0003] To address this, some have attempted a square design, manufacturing the bimetallic strip in a square shape. However, due to the uneven transmission of abrupt stress along the straight edges of the square bimetallic strip, firstly, the square bimetallic strip is prone to shifting within the temperature controller's slot, affecting the stability of its abrupt deformation and leading to inaccurate temperature detection. Secondly, because the straight edges transmit abrupt stress unevenly and are unrestricted, the abrupt deformation can easily cause irreversible deformation when returning to its original state after abrupt deformation, causing a shift in the deformation temperature and similarly resulting in inaccurate temperature detection. Summary of the Invention

[0004] The purpose of this invention is to provide a bimetallic strip that can overcome one or more of the above-mentioned disadvantages, while ensuring the stability of the detection temperature and making full use of materials to reduce manufacturing costs.

[0005] This utility model is implemented as follows: it includes a square bimetallic sheet body, which is arc-shaped. The four corners of the square bimetallic sheet body are chamfered. After chamfering, linear chamfered edges are formed on the four corners of the square bimetallic sheet body. The linear edges are straight or arc-shaped. Protruding reinforcing ribs are provided on the square bimetallic sheet body perpendicular to the chamfered edges. The protruding reinforcing ribs extend to the chamfered edges.

[0006] The four corners of the square bimetallic strip body are chamfered. After chamfering, chamfered edges are formed on the four corners of the square bimetallic strip body, so that the square bimetallic strip can be locked in the slot of the temperature controller, so that the square bimetallic strip will not shift when the temperature changes suddenly, thus ensuring the stability of temperature detection.

[0007] By employing outwardly protruding reinforcing ribs, even if the four sides of the square bimetallic sheet are straight during abrupt changes, causing uneven transmission of abrupt stress to the chamfered corners, the chamfered corner edges can be stably locked in the slots of the temperature controller without shifting, thanks to the reinforcing effect of the outwardly protruding reinforcing ribs. This ensures that when the square bimetallic sheet recovers after an abrupt change, it can return to its original state, preventing the deformation temperature from shifting.

[0008] Because it uses a square bimetallic strip body, it can make full use of the bimetallic strip and save 40% of the material compared to conventional circular discs.

[0009] Preferably, the protruding reinforcing rib is a groove-shaped protrusion. One end of the groove-shaped reinforcing rib is open and located on the chamfer edge, while the other end is blind. This allows the groove-shaped reinforcing rib to smoothly transition with the square bimetallic strip body, so that the groove-shaped reinforcing rib can be processed simultaneously when stamping from the bimetallic strip, thereby ensuring production efficiency.

[0010] Compared with existing technologies, this invention has the advantages of ensuring stable detection temperature while making full use of materials and reducing manufacturing costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a bimetallic sheet according to Embodiment 1 of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the bimetallic sheet in Embodiment 2 of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the bimetallic sheet in Embodiment 3 of this utility model;

[0014] Figure numbers: 1-Square bimetallic sheet body; 2-Chamfer; 201-Chamfer edge; 3-Reinforcing rib; 301-Open opening; 302-Blind opening. Detailed Implementation

[0015] The bimetallic sheet of this utility model will now be described in further detail with reference to the accompanying drawings and embodiments:

[0016] Implementation 1: such as Figure 1 As shown, the bimetallic sheet of this utility model is implemented as follows: it includes a square bimetallic sheet body 1, which is arc-shaped. The four corners 2 of the square bimetallic sheet body are chamfered. After chamfering, linear chamfered edges 201 are formed on the four corners of the square bimetallic sheet body. The linear edges are straight or arc-shaped. An outwardly protruding reinforcing rib 3 is provided on the square bimetallic sheet body 1 perpendicular to the chamfered edges 201. The reinforcing rib 3 extends to the chamfered edges 201.

[0017] Preferably, the reinforcing rib 3 is located on the outer convex arc surface of the square bimetallic sheet body 1.

[0018] Preferably, the reinforcing rib 3 is plate-shaped, with one end of the plate-shaped reinforcing rib 3 flush with the chamfered edge 201, and the other end of the plate-shaped reinforcing rib 3 forming an arc that smoothly transitions to both sides of the plate-shaped reinforcing rib 3, so as to avoid stress concentration at the corner of the reinforcing rib 3 when the bimetallic sheet changes abruptly.

[0019] Preferably, the square bimetallic sheet body 1 with reinforcing ribs 3 and an arc-shaped surface is integrally stamped on the bimetallic strip.

[0020] Implementation 2: For example Figure 2 As shown, this embodiment is based on embodiment one. The reinforcing rib 3 is a groove-shaped protrusion. One end of the groove-shaped reinforcing rib is an open end 301 located on the chamfered edge 201. The other end of the groove-shaped reinforcing rib 3 is an arc-shaped blind end 302, so that the groove-shaped reinforcing rib 3 and the square bimetallic strip body 1 can smoothly transition, so as to avoid stress concentration at the corner of the reinforcing rib 3 when the bimetallic strip changes abruptly. At the same time, the groove-shaped reinforcing rib 3 is processed simultaneously when stamping from the bimetallic strip, thereby ensuring production efficiency. The protrusion of the groove-shaped reinforcing rib 3 is located on the outer convex arc surface of the square bimetallic strip body 1.

[0021] Implementation 3: such as Figure 3 As shown, this embodiment is based on embodiment two, and the protrusion of the groove-shaped reinforcing rib 3 is located on the back side of the outer convex arc surface of the square bimetallic sheet body 1.

[0022] As disclosed in the supporting materials, the bimetallic strip of this patent application was sorted and tested using a disc sorting machine. After 10 sorting tests, the temperature change value of the bimetallic strip was basically the same as that of the traditional circular disc, with no significant change. However, the temperature change of the square bimetallic strip without reinforcing ribs decreased significantly with the increase of sorting times. Therefore, the technology of this patent application meets the quality requirements and can achieve the inventive purpose of this patent application.

Claims

1. A bimetallic strip, characterized by, The square bimetallic strip body is arc-shaped, four corners of the square bimetallic strip body are chamfered corners, linear chamfered corner edges are formed on the four corners of the square bimetallic strip body after the chamfering, the linear edges are straight lines or arcs, and outward convex reinforcing ribs are arranged on the square bimetallic strip body perpendicular to the chamfered corner edges, and the outward convex reinforcing ribs reach the chamfered corner edges.

2. The bimetallic strip of claim 1, wherein The outward convex reinforcing rib is a groove-shaped protrusion, one end of the groove-shaped protrusion is open and located on the chamfered corner edge, and the other end of the groove-shaped protrusion is blind, so that the groove-shaped protrusion and the square bimetallic strip body are smoothly connected.

3. The bimetallic strip of claim 1, wherein The reinforcing rib is plate-shaped, one end of the plate-shaped reinforcing rib is flush with the chamfered corner edge, and the other end of the plate-shaped reinforcing rib is arc-shaped and smoothly connected with two sides of the plate-shaped reinforcing rib.

4. The bimetallic strip according to claim 1 or 2 or 3, characterized in that The arc-shaped square bimetallic strip body with the reinforcing rib is integrally punched on a bimetallic strip.

5. The bimetallic strip according to claim 1 or 2 or 3, characterized in that, The protrusion of the reinforcing rib is located at the back of the outward convex arc surface of the square bimetallic strip body.

6. The bimetallic strip according to claim 1 or 2 or 3, characterized in that, The protrusion of the reinforcing rib is located at the outward convex arc surface of the square bimetallic strip body.

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