Screening structure and vibrating bowl

Abstract

An embodiment of the present application provides a screening structure and a vibrating bowl, which relate to the technical field of material conveying devices. The screening structure is used for screening bimetallic sheets. The screening structure includes a screening section, and the screening section includes a concave rail with an opening direction substantially parallel to the horizontal direction. When the bimetallic sheet enters the screening section, the bimetallic sheet stands on the side wall of the concave rail, and the thickness direction of the bimetallic sheet is substantially parallel to the horizontal direction. The concave rail screens the bimetallic sheets based on the gravity of the bimetallic sheets. In the embodiment of the present application, the concave rail can support or not support the bimetallic sheet based on the position of the center of gravity of the bimetallic sheet in the concave rail, and when the bimetallic sheet cannot be supported, the bimetallic sheet is dropped out of the concave rail to realize the screening of the bimetallic sheet.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of material conveying devices, and in particular, to a screening structure and a vibrating bowl. Background Art

[0002] A bimetallic strip is usually a rectangular plate-like structure and is one of the main components in a circuit breaker, which is used to thermally bend and disconnect the main circuit when the circuit breaker is overloaded. To ensure the performance of the circuit breaker, when welding the bimetallic strip to other components, it is usually necessary to ensure that the active layer and the passive layer in the bimetallic strip face in the correct direction, so that the active layer and the passive layer can be welded to different components respectively. For example, the active layer is welded to the moving arcing plate.

[0003] The screening structure is a device in the vibrating bowl for screening bimetallic strips so that the bimetallic strips with the correct orientations of the active layer and the passive layer reach the welding equipment. However, the existing screening structure has a low accuracy rate when screening bimetallic strips. Summary of the Invention

[0004] In view of the above problems, the embodiments of the present application provide a screening structure and a vibrating bowl to solve the problem of low accuracy rate of the existing screening structure when screening bimetallic strips.

[0005] In a first aspect, the embodiments of the present application provide a screening structure for screening bimetallic strips. The screening structure includes a screening section, and the screening section includes a concave rail with an opening direction substantially parallel to the horizontal direction. When the bimetallic strip enters the screening section, the bimetallic strip stands on the side wall of the concave rail, and the thickness direction of the bimetallic strip is substantially parallel to the horizontal direction. The concave rail screens the bimetallic strip based on the gravity of the bimetallic strip.

[0006] In the technical solution of the embodiments of the present application, by setting the screening section to include a concave rail with an opening direction substantially parallel to the horizontal direction, the concave rail can screen the bimetallic strip based on the position of the center of gravity of the bimetallic strip in the concave rail when the bimetallic strip stands on the side wall of the concave rail and the thickness direction of the bimetallic strip is substantially parallel to the horizontal direction. For example, when the center of gravity of the bimetallic strip is close to the bottom wall of the concave rail, the side wall of the concave rail can support the bimetallic strip. On the contrary, when the center of the bimetallic strip is close to the opening of the concave rail, the side wall of the concave rail cannot support the bimetallic strip, and the bimetallic strip will fall out along the opening of the concave rail, so as to realize the screening of the bimetallic strip by the screening section and improve the accuracy rate of screening the bimetallic strip.

[0007] In some feasible embodiments, the bimetallic strip has an indicating structure. When the bimetallic strip stands on the side wall of the concave rail, the indicating structure faces or backs the bottom wall of the concave rail.

[0008] Through the above solution, the indicating structure can change the position of the center of gravity of the bimetallic strip in the concave rail, so as to increase the probability of the concave rail supporting or not supporting the bimetallic strip, thereby improving the accuracy rate of the concave rail in screening the bimetallic strip.

[0009] In some alternative embodiments, the indicating structure is a first protrusion; when the bottom wall of the concave rail faces away from the first protrusion, the concave rail can support the bimetal sheet; when the first protrusion faces the bottom wall of the concave rail, the concave rail cannot support the bimetal sheet, and the bimetal sheet falls out of the concave rail.

[0010] Through the above solution, when the first protrusion faces away from the bottom wall of the concave rail, the center of gravity of the bimetal sheet can be made to approach the bottom wall of the concave rail, so as to increase the probability that the side wall of the concave rail supports the bimetal sheet. On the contrary, when the first protrusion faces the bottom wall of the concave rail, the center of the bimetal sheet can be made to approach the opening of the concave rail, so as to increase the probability that the side wall of the concave rail does not support the bimetal sheet, making it easier for the bimetal sheet to fall out of the concave rail.

[0011] In some alternative embodiments, the depth L1 of the concave rail is configured as: 1 / 2L2 < L1 ≤ 1 / 2(L2 + L3); where L2 is the thickness of the bimetal sheet and L3 is the dimension of the first protrusion along the thickness direction of the bimetal sheet.

[0012] Through the above solution, when the first protrusion faces away from the bottom wall of the concave rail, the probability that the concave rail supports the bimetal sheet can be further increased, and when the first protrusion faces the bottom wall of the concave rail, the probability that the bimetal sheet falls out of the concave rail can be further increased, thereby improving the accuracy of the concave rail in screening the bimetal sheet.

[0013] In some alternative embodiments, the bottom wall of the concave rail has a receiving groove, and the indicating structure is a second protrusion that matches the receiving groove; when the second protrusion faces the bottom wall of the concave rail, the receiving groove can accommodate the second protrusion, and the concave rail can support the bimetal sheet; when the second protrusion faces away from the bottom wall of the concave rail, at least part of the second protrusion is located outside the concave rail, the concave rail cannot support the bimetal sheet, and the bimetal sheet falls out of the concave rail.

[0014] Through the above solution, when the second protrusion faces the bottom wall of the concave rail, the second protrusion can extend into the receiving groove, so that the center of gravity of the bimetal sheet approaches the bottom wall of the concave rail, increasing the probability that the concave rail supports the bimetal sheet; when the second protrusion faces away from the bottom wall of the concave rail and at least part of it is located outside the concave rail, the center of gravity of the bimetal sheet is also more likely to be located outside the concave rail, so as to increase the probability that the concave rail does not support the bimetal sheet, making it easier for the bimetal sheet to fall out of the concave rail.

[0015] In some alternative embodiments, the depth L4 of the receiving groove and the dimension L5 of the second protrusion along the thickness direction of the bimetal sheet are configured to satisfy: L4 ≥ L5; and, the depth L1 of the concave rail and the thickness L2 of the bimetal sheet are configured to satisfy: L1 = 1 / 2L2.

[0016] Through the above solution, when the second protrusion is completely embedded in the receiving groove, the probability of the concave rail supporting the bimetal sheet can be further increased; when the second protrusion faces away from the bottom wall of the concave rail, the probability of the bimetal sheet falling out of the concave rail can be further increased, thereby improving the accuracy of the concave rail in screening the bimetal sheet.

[0017] In some alternative embodiments, the thickness of the bimetal sheet is greater than the dimension of the indicating structure along the thickness direction of the bimetal sheet.

[0018] Through the above solution, the possibility of the first protrusion affecting the welding quality of the bimetal sheet and other components, and the possibility of affecting the service performance of the bimetal sheet can be reduced.

[0019] In some alternative embodiments, a convex platform extending towards the opening is provided on the bottom wall of the concave rail; the indicating structure is a groove matching the convex platform; when the groove faces the bottom wall of the concave rail, the convex platform can extend into the groove and the concave rail can support the bimetal sheet; when the groove faces away from the bottom wall of the concave rail, the convex platform pushes against the bimetal sheet and the concave rail cannot support the bimetal sheet, and the bimetal sheet falls out of the concave rail.

[0020] Through the above solution, when the groove faces the bottom wall of the concave rail, the groove can cover the convex platform provided on the bottom wall, so that the center of gravity of the bimetal sheet is more likely to approach the bottom wall of the concave rail, increasing the probability of the concave rail supporting the bimetal sheet; when the groove faces away from the bottom wall of the concave rail, the convex platform can push against the bimetal sheet, making the center of gravity of the bimetal sheet more likely to approach the opening of the concave rail and fall out of the concave rail, so as to improve the accuracy of the concave rail in screening the bimetal sheet.

[0021] In some alternative embodiments, along the direction towards the opening, the dimension L6 of the convex platform is less than the depth L1 of the concave rail, and the depth L1 of the concave rail is configured as: 1 / 2L2 ≤ L1 < L6 + 1 / 2L2; where L2 is the thickness of the bimetal sheet.

[0022] Through the above solution, when the groove completely covers the convex platform, the probability of the concave rail supporting the bimetal sheet can be further increased, and when the groove faces away from the bottom wall of the concave rail, the probability of the convex platform pushing against the bimetal sheet causing the bimetal sheet to fall out can be further increased, thereby further improving the accuracy of the concave rail in screening the bimetal sheet.

[0023] In some alternative embodiments, the screening structure further includes a conveying section, the conveying section is connected to the screening section, and the conveying section and the screening section form an annular structure.

[0024] Through the above solution, the conveying section can receive a periodically interrupted force, and under the action of the force, vibrate in the up and down direction and the circumferential direction to obliquely throw the bimetal sheet forward to enter the screening section. The screening section can also vibrate in the up and down direction and the circumferential direction under the action of the force, so that the bimetal sheets that can be supported by the concave rail can advance in the screening section.

[0025] In a second aspect, an embodiment of the present application further provides a vibrating bowl. The vibrating bowl includes the screening structure of the first aspect.

[0026] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and understandable, the following specifically illustrates the embodiments of the present application. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of the screening structure in some embodiments of the present application.

[0029] Figure 2 It is the first cooperation diagram of the concave rail, the indicating structure and the bimetallic strip in some embodiments of the present application.

[0030] Figure 3 It is the second cooperation diagram of the concave rail, the indicating structure and the bimetallic strip in some embodiments of the present application.

[0031] Figure 4 It is the third cooperation diagram of the concave rail, the indicating structure and the bimetallic strip in some embodiments of the present application.

[0032] Figure 5 It is a schematic diagram of the vibrating bowl in some embodiments of the present application.

[0033] Description of the Reference Numerals:

[0034] 1. Bimetallic strip; 11. Indicating structure; 111. First protrusion; 112. Second protrusion; 113. Groove; 2. Screening structure, 21. Screening section; 211. Accommodating groove; 212. Boss; 22. Conveying section. Detailed Embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0036] Reference to "embodiment" in this text means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0037] The term "and / or" in this text is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0038] The directional terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of this application. For example, in the description of this application, terms such as "length", "width", "thickness", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] In addition, terms such as "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" refers to two or more (including two).

[0040] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures may refer to a physical connection, such as a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] To facilitate a clearer understanding of the screening structure and the function of the vibrator bowl provided in the embodiments of the present application, the screening structure and the vibrator bowl are briefly introduced below.

[0042] The vibrator bowl is an auxiliary feeding device for automatic assembly or automatic processing machinery, abbreviated as a component feeding device. During the process of manufacturing a circuit breaker, the vibrator bowl can be set as a feeding device for bimetal sheets at the front end of the welding equipment to convey the bimetal sheets to the welding equipment, facilitating the welding equipment to weld the bimetal sheets with other components.

[0043] When the welding equipment welds the bimetal sheet and other components, to ensure the performance of the circuit breaker, it is necessary to ensure the correct orientation of the active layer and the passive layer of the bimetal sheet. Based on this, in the prior art, those skilled in the art improved the vibrator bowl so that during the process of conveying the bimetal sheet, the vibrator bowl can also screen the bimetal sheet to eliminate the bimetal sheets with incorrect orientations of the active layer and the passive layer, and enable the bimetal sheets with correct orientations of the active layer and the passive layer to enter the welding equipment, so that the welding equipment can correctly weld the bimetal sheet with other components.

[0044] Existing vibrator bowls usually achieve the screening of bimetal sheets through a screening structure. For example, the screening structure is set to include a vision detector, and the vision detector is used to detect and compare the colors of both sides of the bimetal sheet to distinguish the active layer and the passive layer. However, in this screening method, due to the small color difference between the active layer and the passive layer, when detected by the vision detector, large errors are likely to occur, resulting in a low screening accuracy rate.

[0045] Based on this, to improve the accuracy rate of screening bimetal sheets, the embodiments of the present application provide a screening structure 2. Figure 1 For some embodiments of the present application, it is a schematic diagram of the screening structure 2, as Figure 1 shown, the screening structure 2 includes a screening section 21. The screening section 21 includes a concave rail with an opening direction basically parallel to the horizontal direction. When the bimetal sheet 1 enters the concave rail, the bimetal sheet 1 stands on the side wall of the concave rail, and the thickness direction of the bimetal sheet 1 is basically parallel to the horizontal direction. The concave rail screens the bimetal sheet 1 based on the gravity of the bimetal sheet 1.

[0046] The bimetal sheet 1 has at least an active layer and a passive layer arranged in a stacked manner, and the materials of the active layer and the passive layer are different. For example, the active layer is made of materials such as brass, nickel, iron-nickel-chromium, iron-nickel-manganese, and manganese-nickel-copper, and the passive layer is made of an invar-type alloy containing 34-50% nickel. In the case where the materials of the active layer and the passive layer are different, the weight of the active layer is also different from that of the passive layer, and the center of gravity of the bimetal sheet 1 is likely to deviate towards the active layer or the passive layer.

[0047] Based on this, in the embodiments of the present application, by setting a screening structure, the screening structure can screen the bimetallic strip 1 based on the center of gravity position of the bimetallic strip 1. Specifically, the screening structure is set to include a screening section 21, and the screening section 21 is set to include a concave rail with an opening direction substantially parallel to the horizontal direction, so that the bimetallic strip 1 can stand on the side wall of the concave rail when entering the screening section 21. On the premise that the thickness direction of the bimetallic strip 1 is substantially parallel to the horizontal direction, the concave rail can support the bimetallic strip 1 when the center of gravity of the bimetallic strip 1 approaches the bottom wall of the concave rail, and when the center of gravity of the bimetallic strip approaches the opening of the concave rail, the bimetallic strip 1 falls out of the concave rail, realizing the screening of the bimetallic strip 1.

[0048] Among them, the concave rail can be set as a U-shaped rail or an L-shaped rail. When the concave rail is set as an L-shaped rail, the side wall of the concave rail can be substantially parallel to the horizontal direction to support the bimetallic strip 1. In addition, the wall substantially perpendicular to the horizontal direction can be the bottom wall of the concave rail, and the opening of the concave rail refers to the opening on the side opposite to the bottom wall. When the concave rail is set as a U-shaped structure, the side wall of the concave rail can include a first side wall and a second side wall oppositely arranged in the vertical direction, the wall connecting the first side wall and the second side wall can be the bottom wall of the concave rail, and the opening of the concave rail is also the opening on the side opposite to the bottom wall. The opening direction of the concave rail being substantially parallel to the horizontal direction means that the included angle between the opening direction and the horizontal direction is less than 15°.

[0049] In addition, the thickness direction of the bimetallic strip 1 refers to the direction in which the aforementioned active layer and the passive layer are stacked. The thickness direction of the bimetallic strip 1 being substantially parallel to the horizontal direction means that the included angle between the thickness direction of the bimetallic strip 1 and the horizontal direction is less than 15°.

[0050] To facilitate understanding of the specific process of the concave rail screening the bimetallic strip 1, the following is an exemplary description.

[0051] Suppose that the thickness of the active layer and the passive layer in the bimetallic strip 1 is equal, and the weight of the active layer is greater than the weight of the passive layer. Then, the center of gravity of the bimetallic strip 1 will be located in the active layer.

[0052] Based on this, when the bimetallic strip 1 stands on the side wall of the concave rail, if the active layer faces the bottom wall of the concave rail, then the center of gravity of the bimetallic strip 1 will approach the bottom wall of the concave rail to be supported by the side wall. On the contrary, if the active layer faces away from the bottom wall of the concave rail, then the center of gravity of the bimetallic strip 1 will approach the opening of the concave rail, and the bimetallic strip 1 is likely to fall out from the opening.

[0053] Based on the above process, it can be seen that in the technical solution of the embodiments of the present application, the concave rail can support or not support the bimetallic strip 1 based on the position of the center of gravity of the bimetallic strip 1 in the concave rail, realizing the screening of the bimetallic strip 1 and improving the accuracy of screening the bimetallic strip 1.

[0054] It should be noted that the screening structure 2 may include one or more concave tracks. When the screening structure 2 includes a plurality of concave tracks, the plurality of concave tracks may be arranged at intervals to screen the bimetallic strip 1 at different positions, increasing the screening times of a single bimetallic strip 1 and improving the accuracy of screening the bimetallic strip 1.

[0055] According to some other embodiments of the present application, the bimetallic strip 1 has an indicating structure 11. When the bimetallic strip 1 stands on the side wall of the concave track, the indicating structure 11 faces or backs the bottom wall of the concave track.

[0056] The indicating structure 11 is a structure for indicating the orientation of the active layer or the passive layer of the bimetallic strip 1. For example, the indicating structure 11 may be disposed on one side of the active layer of the bimetallic strip 1 to indicate the orientation of the active layer, or disposed on one side of the passive layer of the bimetallic strip 1 to indicate the orientation of the passive layer. The indicating structure 11 may be configured in various structural forms. For example, it may be configured as a convex structure or a groove structure, and the embodiments of the present application do not make special limitations thereto.

[0057] When screening the bimetallic strip 1 having the indicating structure 11, the concave track can be mechanically engaged with the indicating structure 11 and, in combination with the dimensions of the bimetallic strip 1 and the indicating structure 11, to achieve the screening of the bimetallic strip 1. Among them, when the concave track is mechanically engaged with the indicating structure 11, it may or may not be combined with the indicating structure 11, and the present application does not make special limitations thereto. When the concave track is dimensionally matched with the bimetallic strip 1 and the indicating structure 11, the depth of the concave track can be set based on the thickness of the bimetallic strip 1 and the dimension of the indicating structure 11 along the thickness direction of the bimetallic strip 1.

[0058] During specific screening, exemplarily, along the vertical direction, if the projection of the center of gravity of the bimetallic strip 1 and the indicating structure 11 can fall within the projection range of the concave track, then the concave track can support the bimetallic strip 1; on the contrary, if the projection of the center of gravity of the bimetallic strip 1 and the indicating structure 11 falls outside the projection range of the concave track, then the concave track cannot support the bimetallic strip 1, causing the bimetallic strip 1 to fall out of the opening of the concave track under the action of gravity.

[0059] It should be noted that one or more indicating structures 11 may be provided on the bimetallic strip 1. When a plurality of indicating structures 11 are provided on the bimetallic strip 1, the plurality of indicating structures 11 may be distributed along the length direction or the width direction of the bimetallic strip 1. In this way, the concave track can cooperate with the indicating structures 11 at different positions of the bimetallic strip 1 to increase the screening times of a single bimetallic strip 1 and improve the accuracy of screening the bimetallic strip 1.

[0060] It should also be noted that according to the specific structural form of the indicating structure 11, there may be various specific cooperation forms between the concave track and the indicating structure 11 and the bimetallic strip 1. The following combination Figures 2 to 4An exemplary description is given of the mating form of the concave rail with the indicating structure 11 and the bimetallic strip 1. Among them, Figure 2 is the first mating diagram of the concave rail with the indicating structure 11 and the bimetallic strip 1 in some embodiments of the present application. Figure 3 is the second mating diagram of the concave rail with the indicating structure 11 and the bimetallic strip 1 in some embodiments of the present application. Figure 4 is the third mating diagram of the concave rail with the indicating structure 11 and the bimetallic strip 1 in some embodiments of the present application.

[0061] According to some embodiments of the present application, please continue to refer to Figure 2 , the indicating structure 11 is the first protrusion 111; when the bottom wall of the concave rail faces away from the first protrusion 111, the concave rail can support the bimetallic strip 1; when the first protrusion 111 faces the bottom wall of the concave rail, the concave rail cannot support the bimetallic strip 1, and the bimetallic strip 1 falls out of the concave rail.

[0062] The first protrusion 111 can be set in various shapes, for example, hemispherical, prismatic or cylindrical, etc., and the present application does not make special limitations on this. The volume of the first protrusion 111 can be smaller than the volume of the bimetallic strip 1. For example, the volume of the first protrusion 111 can be one-tenth or one-fortieth of the volume of the bimetallic strip 1. In this way, during the process of welding the bimetallic strip 1 to other components or during the use of the bimetallic strip 1, the possibility of the first protrusion 111 affecting the welding quality and the use performance of the bimetallic strip 1 can be reduced.

[0063] It should be noted that when the volume of the first protrusion 111 is smaller than the volume of the bimetallic strip 1, the center of gravity of the bimetallic strip 1 and the first protrusion 111 is more likely to be located on the bimetallic strip 1.

[0064] When the concave rail screens the bimetallic strip 1, since the probability that the first protrusion 111 and the center of gravity of the bimetallic strip 1 are located on the bimetallic strip 1 is relatively large, therefore, when the bimetallic strip 1 enters the concave rail, if the first protrusion 111 faces away from the bottom wall of the concave rail, then, along the vertical direction, the probability that the projection of the first protrusion 111 and the center of gravity of the bimetallic strip 1 falls within the projection of the concave rail is relatively large, that is to say, the concave rail can support the bimetallic strip 1; on the contrary, if the first protrusion 111 is close to the bottom wall of the concave rail, then, along the vertical direction, the probability that the projection of the first protrusion 111 and the center of gravity of the bimetallic strip 1 falls outside the projection of the concave rail is relatively large, and the bimetallic strip 1 and the first protrusion 111 are likely to fall out of the concave rail under the action of gravity.

[0065] Based on the above process, if it is desired to screen out the bimetallic strip 1 with the active layer facing the bottom wall of the concave rail, then the first protrusion 111 can be provided on the plate surface on the passive layer side; on the contrary, if it is desired to screen out the bimetallic strip 1 with the passive layer facing the bottom wall of the concave rail, then the first protrusion 111 can be provided on the plate surface on the active layer side.

[0066] Based on this embodiment, further, please continue to refer to Figure 2 , the depth L1 of the concave rail is configured as: 1 / 2L2 < L1 ≤ 1 / 2(L2 + L3); where L2 is the thickness of the bimetal sheet 1, and L3 is the dimension of the first protrusion 111 along the thickness direction of the bimetal sheet 1.

[0067] If the depth L1 of the concave rail is less than or equal to 1 / 2 of the thickness L2 of the bimetal sheet 1, then it can be foreseen that regardless of whether the first protrusion 111 deviates from the bottom wall of the concave rail, in the vertical direction, the projection of the center of gravity of the bimetal sheet 1 and the first protrusion 111 will be outside the projection range of the concave rail. That is to say, the bimetal sheet 1 and the indicating structure 11 will surely fall out of the concave rail under the action of gravity. Based on this, setting the depth L1 of the concave rail to be greater than 1 / 2 of the thickness L2 of the bimetal sheet 1 can at least increase the probability that the projection of the center of gravity of the bimetal sheet 1 and the first protrusion 111 in the vertical direction is within the vertical projection of the concave rail when the first protrusion 111 deviates from the bottom wall of the concave rail, thereby increasing the probability that the concave rail supports the bimetal sheet 1.

[0068] If the depth L1 of the concave rail is greater than 1 / 2 of the sum of the thickness L2 of the bimetal sheet 1 and the dimension L3 of the first protrusion 111 along the thickness direction of the bimetal sheet 1, then when the first protrusion 111 deviates from the bottom wall of the concave rail, in the vertical direction, the projection of the center of gravity of the bimetal sheet 1 and the first protrusion 111 is also likely to be within the projection range of the concave rail. At this time, the bimetal sheet 1 and the first protrusion 111 are not likely to fall out of the concave rail under the action of gravity. Therefore, setting the depth L1 of the concave rail to be less than or equal to 1 / 2 of the sum of the thickness L2 of the bimetal sheet 1 and the dimension L3 of the first protrusion 111 along the thickness direction of the bimetal sheet 1 can at least make the projection of the center of gravity of the bimetal sheet 1 and the first protrusion 111 in the vertical direction outside the vertical projection range of the concave rail when the first protrusion 111 deviates from the bottom wall of the concave rail, that is to say, make the bimetal sheet 1 easy to fall out of the concave rail.

[0069] In summary, by setting the depth of the concave rail as above, when the first protrusion 111 deviates from the bottom wall of the concave rail, the probability that the bimetal sheet 1 is supported is increased, and when the first protrusion 111 faces the bottom wall of the concave rail, the probability that the bimetal sheet 1 falls out of the concave rail is increased, thereby improving the accuracy of the concave rail in screening the bimetal sheet 1.

[0070] According to some other embodiments of the present application, such as Figure 3As shown, the bottom wall of the concave rail has a receiving groove 211, and the indicating structure 11 is a second protrusion 112 that matches the receiving groove 211; when the second protrusion 112 faces the bottom wall of the concave rail, the receiving groove 211 can accommodate the second protrusion 112, and the concave rail can support the bimetallic strip 1; when the second protrusion 112 faces away from the bottom wall of the concave rail, at least part of the second protrusion 112 is located outside the concave rail, and the concave rail cannot support the bimetallic strip 1, and the bimetallic strip 1 falls out of the concave rail.

[0071] The shape of the second protrusion 112 can be the same as the shape of the first protrusion 111. In addition, the arrangement form of the second protrusion 112 on the bimetallic strip 1 can be the same as the arrangement form of the aforementioned first protrusion 111 on the bimetallic strip 1, which will not be elaborated here.

[0072] When the receiving groove 211 is arranged on the bottom wall of the concave rail, it can be specifically arranged on the side of the bottom wall facing the opening. The shape of the receiving groove 211 can be adapted to the shape of the second protrusion 112. For example, when the cross-section of the second protrusion 112 is square, the receiving groove 211 can be arranged as a square groove. The receiving groove 211 can be arranged in the middle part of the bottom wall in the vertical direction or can deviate from the middle part, and this application does not make special limitations on this.

[0073] When the concave rail screens the bimetallic strip 1, when the bimetallic strip 1 enters the concave rail, if the second protrusion 112 faces the bottom wall of the concave rail, then the second protrusion 112 can extend into the receiving groove 211 to be covered by the receiving groove 211. In this way, in the vertical direction, the probability that the projection of the second protrusion 112 and the center of gravity of the bimetallic strip 1 falls within the projection of the concave rail is relatively large, that is to say, the concave rail can support the bimetallic strip 1; on the contrary, if the second protrusion 112 faces away from the bottom wall of the concave rail, then in the vertical direction, the probability that the projection of the second protrusion 112 and the center of gravity of the bimetallic strip 1 falls outside the projection of the concave rail is relatively large, and the bimetallic strip 1 is likely to fall out of the concave rail.

[0074] Based on the above process, if you want to screen out the bimetallic strip 1 with the active layer facing the bottom wall of the concave rail, then the second protrusion 112 can be arranged on the plate surface on the active layer side; on the contrary, if you want to screen out the bimetallic strip 1 with the passive layer facing the bottom wall of the concave rail, then the second protrusion 112 can be arranged on the plate surface on the passive layer side.

[0075] On the basis of this embodiment, further, the depth L4 of the receiving groove 211 and the dimension L5 of the second protrusion 112 in the thickness direction of the bimetallic strip 1 are configured to satisfy: L4≥L5, and the depth L1 of the concave rail and the thickness L2 of the bimetallic strip 1 are configured to satisfy: L1 = 1 / 2L2.

[0076] When the depth L4 of the receiving groove 211 is greater than or equal to the dimension L5 of the second protrusion 112 in the thickness direction of the bimetallic strip 1, the second protrusion 112 can be completely embedded in the receiving groove 211.

[0077] When the second protrusion 112 can be fully embedded in the receiving groove 211 and the depth L1 of the concave rail is equal to half of the thickness L2 of the bimetal sheet 1, if the second protrusion 112 is fully embedded in the receiving groove 211, then, the concave rail can support half of the bimetal sheet 1 and support the second protrusion 112 through the receiving groove 211; on the contrary, if the second protrusion 112 faces away from the bottom wall of the concave rail, then, the concave rail can support half of the bimetal sheet 1 but cannot support the second protrusion 112. At this time, the bimetal sheet 1 and the second protrusion 112 are more likely to fall out of the concave rail under the action of gravity.

[0078] It can be seen that by setting the depth L4 of the receiving groove 211, the size L5 of the second protrusion 112, and the depth L1 of the concave rail as described above, when the second protrusion 112 is fully embedded in the receiving groove 211, the probability that the bimetal sheet 1 is supported by the concave rail can be increased, and when the second protrusion 112 faces away from the bottom wall of the concave rail, the probability that the bimetal sheet 1 falls out of the concave rail can be increased, thereby improving the accuracy of the concave rail in screening the bimetal sheet 1.

[0079] Based on the above two embodiments, further, please continue to refer to Figures 2 to 3 , the thickness of the bimetal sheet 1 is greater than the size of the indicating structure 11 along the thickness direction of the bimetal sheet 1.

[0080] Since the plate surface of the bimetal sheet 1 is the main surface for welding with other components, and it is also the surface that undergoes thermal deformation to push other components in the circuit breaker (for example, the pull rod) so that the components drive the moving contact to separate from the static contact. Therefore, if the thickness of the bimetal sheet 1 is less than the size of the first protrusion 111 along the thickness direction of the bimetal sheet 1 or the size of the second protrusion 112 along the thickness direction of the bimetal sheet 1, then, the first protrusion 111 or the second protrusion 112 may affect the welding quality between the bimetal sheet 1 and other components, or affect the use performance of the bimetal sheet 1.

[0081] Based on this, in the embodiments of the present application, by setting the size of the first protrusion 111 along the thickness direction of the bimetal sheet 1 and the size of the second protrusion 112 along the thickness direction of the bimetal sheet 1 to be less than the thickness of the bimetal sheet 1, the possibility of the first protrusion 111 or the second protrusion 112 affecting the welding quality between the bimetal sheet 1 and other components, and the possibility of affecting the use performance of the bimetal sheet 1 can be reduced.

[0082] In addition, when the size of the first protrusion 111 along the thickness direction of the bimetal sheet 1 and the size of the second protrusion 112 along the thickness direction of the bimetal sheet 1 are both set to be less than the thickness of the bimetal sheet 1, the occupation of the space inside the circuit breaker by the first protrusion 111 or the second protrusion 112, and the possibility of affecting the layout of other components can also be reduced.

[0083] According to some further embodiments of the present application, please continue to refer to Figure 4 , a boss 212 extending towards the opening is provided on the bottom wall of the concave rail; the indicating structure 11 is a groove 113 matching the boss 212; when the groove 113 faces the bottom wall of the concave rail, the boss 212 can extend into the groove 113, and the concave rail can support the bimetal sheet 1; when the groove 113 faces away from the bottom wall of the concave rail, the boss 212 pushes against the bimetal sheet 1, and the concave rail cannot support the bimetal sheet 1, and the bimetal sheet 1 falls out of the concave rail.

[0084] The groove 113 can be arranged along the length direction of the bimetal sheet 1, and the length of the groove 113 can be the same as the length of the bimetal sheet 1. The groove 113 can be an arc-shaped groove or a square groove, and the present application does not make special limitations on this. The depth of the groove 113 can be set to be relatively small, for example, 0.1 mm, to ensure the service performance of the bimetal sheet 1.

[0085] The shape and size of the boss 212 can correspond to those of the groove 113. When the boss 212 is arranged on the bottom wall of the concave rail, the boss 212 can be arranged at the middle part of the bottom wall of the concave rail in the vertical direction, or can deviate from the middle part. In addition, the boss 212 can be integrally formed or welded with the bottom wall of the concave rail. The present application does not make special limitations on this.

[0086] In this embodiment, when the concave rail screens the bimetal sheet 1, when the bimetal sheet 1 enters the concave rail, if the groove 113 faces the bottom wall of the concave rail, then the boss 212 may extend into the groove 113 to be covered by the groove 113 without abutting against the end face of the bimetal sheet 1. Along the vertical direction, the probability that the projections of the centers of gravity of the bimetal sheet 1 and the groove 113 fall within the projection of the concave rail is relatively large, that is to say, the concave rail can support the bimetal sheet 1; on the contrary, if the groove 113 faces away from the bottom wall of the concave rail, then the boss 212 may abut against the end face of the bimetal sheet 1. Under the abutting action of the boss 212, along the vertical direction, the probability that the projections of the centers of gravity of the bimetal sheet 1 and the groove 113 fall outside the projection of the concave rail is relatively large, that is to say, the concave rail cannot support the bimetal sheet 1, and the bimetal sheet 1 is likely to fall out of the concave rail under the action of gravity.

[0087] Based on the above process, if it is desired to screen out the bimetal sheet 1 with the active layer facing the bottom wall of the concave rail, the groove 113 can be arranged on the plate surface on the side of the active layer; on the contrary, if it is desired to screen out the bimetal sheet 1 with the passive layer facing the bottom wall of the concave rail, the groove 113 can be arranged on the plate surface on the side of the passive layer.

[0088] On the basis of this embodiment, along the direction of the opening, please continue to refer to Figure 4 , the size L6 of the boss 212 is smaller than the depth L1 of the concave rail, and the depth L1 of the concave rail is configured as: 1 / 2L2 ≤ L1 < L6 + 1 / 2L2; where L2 is the thickness of the bimetal sheet 1.

[0089] Along the opening direction, if the dimension L6 of the boss 212 is greater than the depth L1 of the concave rail, then, regardless of whether the groove 113 faces the bottom wall of the concave rail, the boss 212 will push against the bimetallic strip 1, making it impossible for all the bimetallic strips 1 to pass through. Therefore, the dimension L6 of the boss 212 is set to be less than the depth L1 of the concave rail, so that at least the bimetallic strip 1 with the groove 113 facing the bottom wall of the concave rail can pass through the concave rail.

[0090] In addition, if the depth L1 of the concave rail is less than half of the thickness L2 of the bimetallic strip 1, then, regardless of whether the groove 113 faces the bottom wall of the concave rail, the concave rail cannot support the bimetallic strip 1. Therefore, the depth L1 of the concave rail is set to be greater than half of the thickness L2 of the bimetallic strip 1, so that at least the bimetallic strip 1 with the groove 113 facing the bottom wall of the concave rail can pass through the concave rail.

[0091] Furthermore, if the depth L1 of the concave rail is greater than the sum of the dimension L6 of the boss 212 and half of the thickness L2 of the bimetallic strip 1, then, even if the groove 113 faces away from the bottom wall of the concave rail, the concave rail can support the bimetallic strip 1, reducing the accuracy of the screening of the bimetallic strip 1 by the concave rail. Therefore, when the depth L1 of the concave rail is set to be less than the sum of the dimension L6 of the boss 212 and half of the thickness L2 of the bimetallic strip 1, the bimetallic strip 1 with the groove 113 facing the bottom wall of the concave rail can pass through, and the bimetallic strip 1 with the groove 113 facing away from the bottom wall of the concave rail cannot pass through, improving the screening efficiency of the bimetallic strip 1.

[0092] Based on this embodiment, further, the side of the boss 212 facing the bimetallic strip 1 is set as an arc surface, which protrudes towards the bimetallic strip 1.

[0093] The arc surface can be a complete circular arc surface or an arc surface formed by smoothly connecting multiple curved surfaces. The arc surface can protrude towards the bimetallic strip 1.

[0094] If a sharp corner is provided on the side of the boss 212 facing the bimetallic strip 1, then, during the process of the boss 212 extending into the groove 113, the groove wall of the groove 113 may be scratched, affecting the performance of the bimetallic strip 1. Therefore, when the side of the boss 212 facing the bimetallic strip 1 is set as an arc surface, the possibility of the boss 212 scratching the bimetallic strip 1 can be reduced.

[0095] According to some embodiments of the present application, please continue to refer to Figure 1 , the screening structure 2 further includes a conveying section 22, the conveying section 22 is connected to the screening section 21, and the conveying section 22 and the screening section 21 form an annular structure.

[0096] The conveying section 22 is a structure for conveying the bimetal sheet 1 to the screening section 21. The conveying section 22 can be set as a plate-like structure or a conveying track with a structure similar to that of the screening section 21. The embodiments of the present application do not make special limitations on this. When the conveying section 22 is set as a conveying track with a structure similar to that of the screening section 21, the opening direction of the conveying track can be basically parallel to the vertical direction or the same as the opening direction of the concave track. The present application does not make special limitations on this, as long as the conveying track can convey the bimetal sheet 1 to the concave track.

[0097] When the conveying section 22 conveys the bimetal sheet 1, it can receive intermittent forces at a certain frequency. Under the action of the forces, it vibrates in the vertical direction and the circumferential direction to obliquely throw the bimetal sheet 1 forward and make it enter the screening section 21.

[0098] When the conveying section 22 is connected to the screening section 21, they can be welded together or connected together through other components (such as connecting plates). The embodiments of the present application do not make special limitations on this. In addition, when the conveying section 22 is connected to the screening section 21, multiple conveying sections 22 and screening sections 21 can be provided. A screening section 21 can be connected between two adjacent conveying sections 22. In this way, multiple screenings of the bimetal sheet 1 can be realized, and the screening efficiency of the bimetal sheet 1 can be improved.

[0099] It should be noted that after the conveying section 22 is connected to the screening section 21, when the conveying section 22 vibrates in the vertical direction and the circumferential direction under the action of the forces, the screening section 21 can also vibrate in the vertical direction and the circumferential direction under the action of the forces, so that the bimetal sheet 1 can also move forward in the screening section 21 during the screening process.

[0100] When the conveying section 22 and the screening section 21 form an annular structure, the annular structure can have a notch. The bimetal sheet 1 can enter the conveying section 22 from one end of the notch and pass through the screening of the screening section 21 and then exit from the other end of the notch.

[0101] According to some embodiments of the present application, the present application also provides a vibrating disk. Figure 5 It is a schematic diagram of the vibrating disk in some embodiments of the present application, as Figure 5 shown. The vibrating disk includes the aforementioned screening structure 2.

[0102] Since the screening structure and its beneficial effects have been elaborated in detail in the foregoing embodiments, the present application will not repeat them here.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A screening structure for screening bimetallic strips, characterized in that the screening structure includes a screening section, the screening section includes a concave rail with an opening direction substantially parallel to the horizontal direction. When the bimetallic strip enters the screening section, the bimetallic strip stands on the side wall of the concave rail, and the thickness direction of the bimetallic strip is substantially parallel to the horizontal direction. The concave rail screens the bimetallic strip based on the gravity of the bimetallic strip; wherein, in the thickness direction of the bimetallic strip, the bimetallic strip includes an active layer and a passive layer distributed in sequence, and the center of gravity of the bimetallic strip biases towards the active layer or the passive layer. The concave rail screens the bimetallic strip based on the relative relationship between the center of gravity of the bimetallic strip and the opening; wherein, the bimetallic strip has an indicating structure. When the bimetallic strip stands on the side wall of the concave rail, the indicating structure faces or backs the bottom wall of the concave rail; the bottom wall of the concave rail has a receiving groove, and the indicating structure is a second protrusion matching the receiving groove; when the second protrusion faces the bottom wall of the concave rail, the receiving groove can accommodate the second protrusion, and the concave rail can support the bimetallic strip; when the second protrusion backs the bottom wall of the concave rail, at least part of the second protrusion is located outside the concave rail, and the concave rail cannot support the bimetallic strip, and the bimetallic strip falls out of the concave rail; or, a convex platform extending towards the opening is provided on the bottom wall of the concave rail; the indicating structure is a groove matching the convex platform; when the groove faces the bottom wall of the concave rail, the convex platform can extend into the groove, and the concave rail can support the bimetallic strip; when the groove backs the bottom wall of the concave rail, the convex platform pushes the bimetallic strip, and the bimetallic strip falls out of the concave rail.

2. The screening structure according to claim 1, wherein The depth L4 of the receiving groove and the dimension L5 of the second protrusion along the thickness direction of the bimetallic strip are configured to satisfy: L4≥L5; and, the depth L1 of the concave rail and the thickness L2 of the bimetallic strip are configured to satisfy: L1 = 1 / 2L2.

3. The screening structure according to claim 1, wherein Along the opening direction, the dimension L6 of the convex platform is less than the depth L1 of the concave rail, and the depth L1 of the concave rail is configured to satisfy: 1 / 2L2≤L1<L6 + 1 / 2L2; wherein, L2 is the thickness of the bimetallic strip.

4. The screening structure according to claim 1, wherein The screening structure further includes a conveying section, the conveying section is connected to the screening section, and the conveying section and the screening section form an annular structure.

5. A vibrating bowl, characterized in that, Including the screening structure according to any one of claims 1 to 4.

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