A change-over switchgear

Abstract

The application provides a transfer switch, belonging to the technical field of electrical equipment. The transfer switch comprises a shell and mounting brackets. The shell comprises a side wall provided with a guide rail groove penetrating through the side wall along the length direction of the shell. The mounting brackets are two, each comprising a clamping part and a fixing part connected with each other, the two clamping parts are respectively inserted into the guide rail groove from the two sides of the shell along the opening direction of the guide rail groove, and the two fixing parts are respectively fixed to the shell from the two sides of the shell. The clamping part of the mounting bracket is inserted into the side wall of the shell along the length direction of the guide rail groove, so that the mounting bracket is axially positioned and constrained. In this way, the transfer switch can be installed in the power distribution cabinet in special circumstances without the guide rail, thereby solving the installation problem of the transfer switch in special scenarios.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a changeover switch. Background Technology

[0002] A transfer switch is an electrical control device used for switching circuits or loads. Its core function is to reliably connect, disconnect, or switch between two or more power sources to ensure power continuity or meet specific operational requirements. Transfer switches are widely used in hospitals, banks, power plants, chemical plants, metallurgical plants, and other applications.

[0003] In practical use, transfer switches are usually installed in the distribution cabinet via DIN rails. However, the existing technology has problems with the inconvenience of installation. Utility Model Content

[0004] This application provides a changeover switch to reduce the difficulty of installing changeover switches.

[0005] In a first aspect, this application provides a changeover switch. The changeover switch includes a housing and mounting brackets. The housing includes a side wall with a guide rail groove extending through the side wall along its length. Two mounting brackets are provided, each including a connecting snap-fit ​​portion and a fixing portion. The two snap-fit ​​portions are inserted into the guide rail groove from both sides of the housing along the opening direction of the guide rail groove, and the two fixing portions fix the housing from both sides.

[0006] With the above solution, the snap-fit ​​part of the mounting bracket inserts into the side wall of the housing along the length of the guide rail groove, thus providing a positioning constraint for the mounting bracket along the axial direction of the housing. Two mounting brackets are symmetrically distributed on both sides of the housing, and the fixing parts of the mounting brackets can be connected to the distribution cabinet via fasteners. This not only improves the stability of the transfer switch when fixed, but also provides a balanced constraint force on the housing using the fixing parts on both sides. In this way, the transfer switch can still be installed in the distribution cabinet even in special circumstances where installing guide rails is inconvenient. This not only solves the installation difficulties of the transfer switch in special scenarios, but also improves the stability of the transfer switch after installation.

[0007] In one possible design, the length of the fixing part is greater than the width of the guide rail groove, and the snap-fit ​​part is connected to the middle area of ​​the fixing part. Each end of the fixing part has a mounting hole.

[0008] With the above scheme, the portion of the fixing part that extends beyond the width of the guide rail groove can form a cantilever support structure, creating symmetrically distributed load-bearing surfaces on both sides of the housing. When the snap-fit ​​part is centrally connected to the fixing part, the center of gravity of the housing and the mounting bracket is located on the geometric center line of the fixing part. The two mounting holes are located at the extended ends of the fixing part that extend beyond the width of the guide rail groove, allowing for symmetrical constraints on the mounting bracket during installation using two sets of fasteners.

[0009] Compared to existing technologies, traditional transfer switchgear, when installed on a DIN rail, only has a single mounting hole, resulting in concentrated stress on a single point. This solution, however, extends the fixing section to form a symmetrical support structure, combined with a dual mounting hole layout, ensuring that installation stress is evenly distributed along the length of the fixing section. This improves the stability of the transfer switchgear installation and reduces the probability of it falling out of the distribution cabinet due to insecure fixing.

[0010] In one possible design, the sidewall includes a first sidewall and a second sidewall, which are perpendicular to each other. A guide rail groove is disposed on the first sidewall. Both the snap-fit ​​portion and the fixing portion are parallel to the first sidewall. The mounting bracket also includes a first limiting member, which is connected to the fixing portion and is perpendicular to the fixing portion. When the snap-fit ​​portion is inserted into the guide rail groove, the first limiting member contacts the second sidewall.

[0011] Through the above scheme, the first limiting member cooperates with the second side wall to limit the mounting bracket, preventing it from moving further along the guide rail groove after installation. The direct contact constraint between the first limiting member and the second side wall forms a stable lateral support structure, improving the mounting bracket's resistance to displacement under complex working conditions and ensuring the reliability of the changeover switchgear installation without a guide rail.

[0012] In one possible design, the first limiting element is a limiting plate.

[0013] With the above solution, when the first limiting component is a limiting plate, the limiting plate can distribute the load to the entire contact area of ​​the second sidewall through planar contact, avoiding local stress concentration that could lead to shell deformation. Furthermore, the planar structure of the limiting plate simplifies the processing of the mounting bracket; the vertical connection between the limiting plate and the fixing part can be completed by cutting and bending the sheet metal, thus reducing the processing complexity and manufacturing cost of the mounting bracket.

[0014] In one possible design, a second limiting member is provided within the guide rail groove, and a limiting part is provided within the snap-fit ​​portion. The second limiting member cooperates with the limiting part to limit the housing's position on the mounting bracket.

[0015] The above solution allows for the limiting of the mounting bracket by cooperating with the limiting part on the snap-fit ​​part within the guide rail groove. This prevents the mounting bracket from sliding along the guide rail groove, thereby improving the stability of the changeover switchgear in non-guide rail installation scenarios.

[0016] In one possible design, the second limiting member is a limiting block, the limiting part is a limiting groove, and the limiting member is located within the limiting groove.

[0017] The above solution reduces the likelihood of the mounting bracket sliding within the limiting groove during operation of the transfer switch, thus improving its stability in rail-less installation scenarios. Furthermore, the mating structure of the limiting block and limiting groove can withstand multi-directional impacts, minimizing the risk of connection failure between the housing and mounting bracket due to vibration during use.

[0018] In one possible design, the second limiting member has a first guide slope on the side wall near the fixing part.

[0019] With the above scheme, when the mounting bracket is inserted into the guide rail groove, the restricted part of the locking portion first contacts the guide ramp of the second limiting member. Due to the inclination angle of the ramp, the restricted part is subjected to an oblique component force during the contact process, forcing the locking part to make a slight displacement along the ramp direction. This displacement allows the relative position between the locking part and the guide rail groove to be automatically adjusted, avoiding rigid collision between the restricted part and the second limiting member. As the mounting bracket continues to advance, the restricted part slides along the guide ramp into the predetermined position of the second limiting member, ultimately forming a stable limiting fit. The guide ramp provided on the second limiting member makes the contact process between the restricted part and the second limiting member smoother.

[0020] In one possible design, a second guide slope is provided on the side wall of the snap-fit ​​part away from the fixing part, and the second guide slope corresponds to the first guide slope.

[0021] By using the above solution, a second guide slope is provided on the side wall of the snap-fit ​​part away from the fixing part, and the second guide slope corresponds to the first guide slope. This can make the installation process of the mounting bracket smoother, and at the same time reduce the damage to the second limiting member caused by the assembly of the mounting bracket.

[0022] In one possible design, the mounting bracket is equipped with reinforcing ribs.

[0023] By employing the above-described method, the addition of reinforcing ribs allows the mounting bracket to maintain its thickness while optimizing its cross-sectional shape to increase its flexural section modulus, thereby preventing plastic deformation caused by excessive local stress. This, in turn, improves the mounting bracket's resistance to deformation. This enhances the structural stability of the mounting bracket during fixing, preventing deformation caused by mechanical loads or vibrations.

[0024] In one possible design, the guide rail groove is a C-shaped groove, and the snap-fit ​​part snaps into the C-shaped groove.

[0025] Through the above solution, this application achieves tool-free rapid assembly of the mounting bracket and housing in rail-free installation scenarios. Mechanical engagement replaces traditional bolt fixing, avoiding the difficulty of positioning caused by limited operating space. The fit between the snap-fit ​​part and the C-groove allows the mounting bracket and housing to automatically form a stable connection after connection, making the connection between the mounting bracket and housing more stable, thereby ensuring more stable installation of the changeover switchgear. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the changeover switch provided in the embodiment of this application from one perspective.

[0027] Figure 2 This is a schematic diagram of the mounting bracket provided in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the housing provided in an embodiment of this application from one perspective.

[0029] Figure 4 This is a schematic diagram of the structure of the changeover switch provided in an embodiment of this application from another perspective.

[0030] Figure 5 for Figure 1 A magnified view of section A.

[0031] Figure 6 This is a schematic diagram of the housing provided in an embodiment of this application from another perspective.

[0032] Explanation of reference numerals in the attached figures: 100. Housing; 110. Guide rail groove; 111. Second limiting member; 120. First side wall; 130. Second side wall; 200. Mounting bracket; 210. Snap-fit ​​part; 211. Restricted part; 220. Fixing part; 221. Mounting hole; 230. First limiting member. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application.

[0035] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other terms. The words "a" or "an" do not exclude the presence of multiple terms.

[0036] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0038] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Transfer switches typically include automatic transfer switches, manual transfer switches, and remote control transfer switches. In existing technologies, transfer switches usually require DIN rails for installation. However, in situations where the internal space of the distribution cabinet is limited or the structure is unique, DIN rail installation presents difficulties. Traditional fixing methods rely on pre-set installation positions for the DIN rails. When the cabinet structure does not allow for DIN rail installation, the stability of the equipment is significantly reduced, easily leading to equipment displacement or poor contact.

[0042] To address the aforementioned problems, this application provides a changeover switch. To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of the structure of the changeover switch provided in the embodiment of this application from one perspective. Figure 2 This is a schematic diagram of the mounting bracket provided in an embodiment of this application. Figure 1 as well as Figure 2 As shown, this application provides a changeover switch. The changeover switch includes a housing 100 and mounting brackets 200. The housing 100 includes a side wall with a guide rail groove 110 extending through the side wall along the length of the housing 100. There are two mounting brackets 200, each including a connecting snap-fit ​​portion 210 and a fixing portion 220. The two snap-fit ​​portions 210 are inserted into the guide rail groove 110 from both sides of the housing 100 along the opening direction of the guide rail groove 110, and the two fixing portions 220 fix the housing 100 from both sides.

[0044] The guide rail groove 110 refers to a groove structure that runs longitudinally through the side wall of the housing 100. It can be made by machining or molding. The through feature of the guide rail groove 110 allows the mounting bracket 200 to be inserted into the housing 100 from both sides.

[0045] The snap-fit ​​part 210 refers to the protruding structure on the mounting bracket 200 that forms a plug-in fit with the guide rail groove 110. The snap-fit ​​part 210 and the guide rail groove 110 can achieve the plug-in positioning of the mounting bracket 200 through geometric matching.

[0046] The fixing part 220 refers to the extension part on the mounting bracket 200 used to connect the distribution cabinet. The fixing part 220 can be a plate-shaped structure with mounting holes 221. When the snap-fit ​​part 210 is inserted into the guide rail groove 110, the fixing part 220 and the distribution cabinet are connected by bolts, so that the housing 100 and the cabinet can be rigidly fixed.

[0047] In summary, the snap-fit ​​portion 210 of the mounting bracket 200 is inserted into the side wall of the housing 100 along the length of the guide rail groove 110, which can form a positioning constraint on the mounting bracket 200 along the axial direction of the housing 100. Two mounting brackets 200 are symmetrically distributed on both sides of the housing 100, and the fixing portion 220 of the mounting bracket 200 can be connected to the distribution cabinet via fasteners. This not only improves the stability of the transfer switch when fixed, but also utilizes the fixing portions 220 on both sides to generate a balanced constraint force on the housing 100. Thus, the transfer switch can still be installed in the distribution cabinet even in special circumstances where it is inconvenient to install guide rails, solving the installation difficulties of the transfer switch in special scenarios and improving the stability of the transfer switch after installation.

[0048] Furthermore, please continue to refer to Figure 1 as well as Figure 2 As shown, the length of the fixing part 220 can be greater than the width of the guide rail groove 110, and the snap-fit ​​part 210 can be connected to the middle area of ​​the fixing part 220. A mounting hole 221 can be provided at each end of the fixing part 220.

[0049] The length of the fixing part 220 refers to the dimension of the lateral extension of the mounting bracket 200. The length of the fixing part 220 can be designed to be 1.5-2 times the width of the guide rail groove 110.

[0050] The connection between the snap-fit ​​portion 210 and the middle area of ​​the fixing portion 220 means that the center line of the snap-fit ​​portion 210 is aligned with the center line of the fixing portion 220, so that the snap-fit ​​portion 210 can be located on the axis of symmetry of the fixing portion 220.

[0051] The mounting hole 221 can be a through hole structure opened at both ends of the fixing part 220 along the thickness direction of the fixing part 220, and the two mounting holes 221 can be symmetrically distributed at both ends of the length direction of the fixing part 220.

[0052] In summary, the portion of the fixing part 220 that extends beyond the width of the guide rail groove 110 can form a cantilever support structure, creating symmetrically distributed bearing surfaces on both sides of the housing 100. When the snap-fit ​​part 210 is centrally connected to the fixing part 220, the center of gravity of the housing 100 and the mounting bracket 200 is located on the geometric center line of the fixing part 220. The two mounting holes 221 are located at the extended ends of the fixing part 220 that extend beyond the width of the guide rail groove 110, allowing for symmetrical constraints on the mounting bracket 200 during installation using two sets of fasteners.

[0053] Compared to existing technologies, traditional transfer switchgear, when installed on a DIN rail, only has a single mounting hole 221, resulting in concentrated stress on a single point. This solution, however, extends the fixing part 220 to form a symmetrical support structure, and with a double mounting hole 221 layout, distributes the installation stress evenly along the length of the fixing part 220. This improves the stability of the transfer switchgear installation and reduces the probability of it falling out of the distribution cabinet due to insecure fixing.

[0054] Figure 3 This is a schematic diagram of the housing provided in an embodiment of this application from one perspective. Figure 4 This is a schematic diagram of the structure of the changeover switch provided in an embodiment of this application from another perspective. (See diagram below.) Figures 2 to 4 As shown, the sidewall includes a first sidewall 120 and a second sidewall 130, which are perpendicular to each other. A guide rail groove 110 is disposed on the first sidewall 120. The snap-fit ​​part 210 and the fixing part 220 are both parallel to the first sidewall 120.

[0055] The first sidewall 120 refers to the mounting surface on the housing 100 where the guide rail groove 110 is provided. The first sidewall 120 can be a planar plate structure, and it can be used to support the insertion movement of the mounting bracket 200. The second sidewall 130 refers to the constraint surface that forms a right angle connection with the first sidewall 120, which can be implemented using a vertically bent plate structure.

[0056] Please continue to refer to Figures 2 to 4 As shown, to improve the reliability of the mounting bracket 200, this application further improves the mounting bracket 200 as follows: the mounting bracket 200 includes a first limiting member 230, which is connected to the fixing part 220 and is perpendicular to the fixing part 220. When the snap-fit ​​part 210 is inserted into the guide rail groove 110, the first limiting member 230 contacts the second side wall 130.

[0057] The first limiting member 230 refers to the blocking member that extends perpendicularly to the fixing part 220. Specifically, it can be implemented by using an L-shaped folding plate formed by metal stamping. The setting of the first limiting member 230 can be used to limit the displacement of the mounting bracket 200 along the direction of the first side wall 120.

[0058] Specifically, when the snap-fit ​​part 210 is inserted along the guide groove 110 of the first sidewall 120, the fixing part 220 remains parallel to the first sidewall 120. At this time, the first limiting member 230 naturally extends towards the second sidewall 130 because it is perpendicular to the fixing part 220. After installation, the end face of the first limiting member 230 can form a surface contact with the second sidewall 130, thereby generating a constraint force on the mounting bracket 200 in the insertion direction perpendicular to the guide groove 110. This constraint mechanism, through the right-angled arrangement of the first sidewall 120 and the second sidewall 130, converts the lateral displacement of the mounting bracket 200 into an abutment force between the first limiting member 230 and the second sidewall 130.

[0059] Through the above technical solution, the first limiting member 230 cooperates with the second side wall 130 to limit the mounting bracket 200, preventing it from moving further along the guide rail groove 110 after installation. The direct contact constraint between the first limiting member 230 and the second side wall 130 forms a stable lateral support structure, improving the mounting bracket 200's resistance to displacement under complex working conditions and ensuring the reliability of the changeover switchgear installation without a guide rail.

[0060] Please continue to refer to Figure 2 as well as Figure 4 As shown, the first limiting member 230 can further be a limiting plate.

[0061] The limiting plate can be a plate-shaped component with a planar structure. The limiting plate can be made by stamping and bending metal sheet. The planar area of ​​the limiting plate can be used to form a surface contact with the second side wall 130.

[0062] The limiting plate is vertically connected to the fixing part 220, and the lateral load of the mounting bracket 200 can be evenly transferred to the second side wall 130 through planar contact.

[0063] Specifically, the limiting plate and the fixing part 220 can be integrally formed, creating a perpendicular angle relationship. When the snap-fit ​​part 210 is inserted into the guide rail groove 110, the limiting plate comes into close contact with the second side wall 130, which increases the contact area between the limiting plate and the second side wall 130. The surface contact method allows the contact area to be greater than that of line contact or point contact. This provides greater stability when the mounting bracket 200 is subjected to external forces.

[0064] In summary, when the first limiting member 230 is a limiting plate, the limiting plate can distribute the load to the entire contact area of ​​the second sidewall 130 through planar contact, avoiding local stress concentration that could lead to deformation of the housing 100. Furthermore, the planar structure of the limiting plate simplifies the processing of the mounting bracket 200; the vertical connection between the limiting plate and the fixing part 220 can be achieved simply by cutting and bending the sheet metal. This reduces the processing complexity and manufacturing cost of the mounting bracket 200.

[0065] Figure 5 for Figure 1 An enlarged view of section A. (See image.) Figure 1 , Figure 2 as well as Figure 5 As shown, in order to improve the stability of the connection between the mounting bracket 200 and the housing 100, a second limiting member 111 may be provided in the guide rail groove 110, and a limiting part 211 may be provided in the snap-fit ​​part 210. The second limiting member 111 and the limiting part 211 cooperate to limit the mounting bracket 200 by the housing 100.

[0066] The second limiting member 111 is a structure disposed inside the guide rail groove 110 for limiting the mounting bracket 200. The second limiting member 111 can be integrally formed with the housing 100. The restricted part 211 is a structure disposed on the surface of the snap-fit ​​part 210 for cooperating with the second limiting member 111 to limit the mounting bracket 200. The cooperation between the second limiting member 111 and the restricted part 211 can form a physical barrier, restricting the sliding displacement of the mounting bracket 200 along the guide rail groove 110.

[0067] Specifically, when the snap-fit ​​portion 210 of the mounting bracket 200 is inserted into the guide rail groove 110, the restrictive portion 211 of the snap-fit ​​portion 210 can form a limiting relationship with the second limiting member 111 in the guide rail groove 110. After the mounting bracket 200 is installed in place, the restrictive portion 211 cooperates with the second limiting member 111, preventing the mounting bracket 200 from moving along the extension direction of the guide rail groove 110.

[0068] Through the above technical solution, by cooperating with the second limiting member 111 in the guide rail groove 110 and the limiting part 211 provided on the snap-fit ​​part 210, the mounting bracket 200 can be limited, thereby preventing the mounting bracket 200 from sliding along the guide rail groove 110. This can improve the stability of the installation of the changeover switch electrical appliance in non-guide rail installation scenarios.

[0069] Furthermore, please continue to refer to Figure 1 , Figure 2 as well as Figure 5 As shown, the second limiting member 111 can be a limiting block, the limiting part 211 can be a limiting groove, and the limiting member is located in the limiting groove.

[0070] The limiting block can be a protruding structure set on the inner wall of the guide rail groove 110. The function of the limiting block is to restrict the sliding of the locking part 210 along the guide rail groove 110 by cooperating with the limiting groove.

[0071] The limiting groove can be a recessed structure formed on the side wall of the snap-fit ​​portion 210, which can be achieved by milling or in-mold forming. The limiting groove can be formed at the end of the snap-fit ​​portion 210 away from the fixing portion 220. The function of the limiting groove is to form a mechanical interlock by accommodating the limiting block, so as to prevent relative sliding between the mounting bracket 200 and the housing 100.

[0072] Specifically, when the snap-fit ​​portion 210 of the mounting bracket 200 is inserted into the guide rail groove 110, the limiting block can be embedded in the limiting groove, forming a nested fit. When the housing 100 is subjected to external force, the groove wall of the limiting groove can generate a reaction force with the contact surface of the limiting block, dispersing the external force to the connection area between the guide rail groove 110 and the snap-fit ​​portion 210.

[0073] In summary, the cooperation between the limiting block and the limiting groove can reduce the problem of the mounting bracket 200 sliding within the limiting groove during the use of the changeover switch, thus improving the installation stability of the changeover switch in rail-less installation scenarios. Furthermore, the cooperation structure of the limiting block and the limiting groove can withstand multi-directional external force impacts, reducing the possibility of connection failure between the housing 100 and the mounting bracket 200 due to vibration during the use of the changeover switch.

[0074] Furthermore, please continue to refer to Figure 1 , Figure 2 as well as Figure 5 As shown, the second limiting member 111 may have a first guide slope on the side wall near the fixing part 220.

[0075] The first guide slope can be an inclined surface set on the side wall of the second limiting member 111. Specifically, it can be achieved by machining the side wall of the limiting block with an inclined surface. The function of the first guide slope is to guide the snap-fit ​​part 210 to make sliding contact with the second limiting member 111 during the process of inserting the mounting bracket 200 into the guide rail groove 110, thereby reducing the assembly resistance.

[0076] In summary, when the mounting bracket 200 is inserted into the guide rail groove 110, the restricted portion 211 of the locking portion 210 first contacts the first guide ramp of the second limiting member 111. Due to the inclination angle of the ramp, the restricted portion 211 is subjected to an oblique component force during the contact process, forcing the locking portion 210 to undergo a slight displacement along the ramp direction. This displacement causes the relative position between the locking portion 210 and the guide rail groove 110 to automatically adjust, avoiding rigid collision between the restricted portion 211 and the second limiting member 111. As the mounting bracket 200 continues to advance, the restricted portion 211 slides along the first guide ramp into the predetermined position of the second limiting member 111, ultimately forming a stable limiting fit. The first guide ramp provided on the second limiting member 111 makes the contact process between the restricted portion 211 and the second limiting member 111 smoother.

[0077] Furthermore, please continue to refer to Figure 1 , Figure 2 as well as Figure 5 As shown, the snap-fit ​​part 210 has a second guide slope on the side wall away from the fixing part 220, and the second guide slope corresponds to the first and second guide slopes.

[0078] The second guide slope refers to the inclined surface provided at the insertion end of the snap-fit ​​part 210. It can be achieved by cutting or injection molding. The second guide slope is used to generate a sliding guide effect when the snap-fit ​​part 210 contacts the second limiting member 111 during the process of inserting into the guide rail groove 110.

[0079] When the mounting bracket 200 is inserted into the guide rail groove 110, the second guide ramp provided on the side wall of the snap-fit ​​part 210 away from the fixing part 220 can contact the second guide ramp of the second limiting member 111. Since the interaction force between the ramps is decomposed into components perpendicular to the ramps and parallel to the ramps, the parallel component drives the snap-fit ​​part 210 to slide along the direction of the guide rail groove 110, thereby reducing the insertion resistance.

[0080] By using the above technical solution, a second guide slope is provided on the side wall of the snap-fit ​​part 210 away from the fixing part 220, and the second guide slope corresponds to the first guide slope, which can make the installation process of the mounting bracket 200 smoother, and at the same time reduce the damage to the second limiting member 111 caused by the assembly of the mounting bracket 200.

[0081] like Figure 2 As shown, this application further proposes a technical solution where the mounting bracket 200 is provided with reinforcing ribs.

[0082] Reinforcing ribs refer to raised structures on the surface of the mounting bracket 200, which can be implemented using longitudinally extending strip-shaped protrusions or cross-grid-shaped protrusions. By altering the geometric distribution of the mounting bracket 200's cross-section, reinforcing ribs can form a three-dimensional support system, effectively dispersing stress concentration areas when bearing loads.

[0083] In summary, the addition of reinforcing ribs allows the mounting bracket 200 to improve its flexural section modulus by optimizing its cross-sectional shape while maintaining the same thickness, thereby preventing plastic deformation caused by excessive local stress. This, in turn, enhances the deformation resistance of the mounting bracket 200. Consequently, it increases the structural stability of the mounting bracket 200 when fixed, preventing deformation caused by mechanical loads or vibrations.

[0084] Figure 6 This is a schematic diagram of the housing provided in an embodiment of this application from another perspective. (See diagram below.) Figure 2 as well as Figure 6 As shown, the guide rail groove 110 can be a C-shaped groove, and the snap-fit ​​part 210 can be snapped into the C-shaped groove.

[0085] A C-groove refers to a groove with a semi-enclosed cross-section. The opening of the C-groove can limit the locking part 210. The locking part 210 can achieve mechanical interlocking between the mounting bracket 200 and the housing 100 by embedding it into the groove.

[0086] Through the above technical solution, this application achieves tool-free rapid assembly of the mounting bracket 200 and the housing 100 in a rail-less installation scenario. Mechanical interlocking replaces the traditional bolt fixing method, avoiding the difficulty of positioning caused by limited operating space. The engagement between the snap-fit ​​part 210 and the C-groove allows the mounting bracket 200 and the housing 100 to automatically form a stable connection, making the connection between the mounting bracket 200 and the housing 100 more stable, thereby making the installation of the changeover switch more stable.

Claims

1. A transfer switch apparatus, characterized by comprising: include: The housing includes a sidewall, the sidewall being provided with a guide rail groove that extends through the sidewall along the length of the housing. The mounting brackets are of two types, each including a connecting snap-fit ​​part and a fixing part. The two snap-fit ​​parts are inserted into the guide rail grooves from both sides of the housing along the opening direction of the guide rail grooves, and the two fixing parts fix the housing from both sides of the housing respectively.

2. The switchgear according to claim 1, characterized in that The length of the fixing part is greater than the width of the guide rail groove, and the snap-fit ​​part is connected to the middle area of ​​the fixing part; Each end of the fixing part is provided with a mounting hole.

3. The switchgear according to claim 1, characterized in that The sidewall includes a first sidewall and a second sidewall, the first sidewall and the second sidewall are perpendicular to each other, and the guide rail groove is disposed on the first sidewall; Both the snap-fit ​​portion and the fixing portion are parallel to the first side wall; The mounting bracket further includes a first limiting member, which is connected to the fixing part and is perpendicular to the fixing part; When the snap-fit ​​part is inserted into the guide rail groove, the first limiting member contacts the second side wall.

4. The switchgear according to claim 3, characterized in that The first limiting component is a limiting plate.

5. The switchgear according to any of claims 1-4, characterized in that The guide rail groove is provided with a second limiting member, and the snap-fit ​​part is provided with a limiting part; The second limiting member cooperates with the limiting part to limit the mounting bracket by the housing.

6. The switchgear according to claim 5, characterized in that The second limiting member is a limiting block, the limiting part is a limiting groove, and the limiting member is located in the limiting groove.

7. The switchgear according to claim 5, characterized in that The second limiting member has a first guide slope on the side wall near the fixing part.

8. The switchgear according to claim 7, characterized in that The snap-fit ​​portion has a second guide slope on the side wall away from the fixing portion; The second guide slope corresponds to the first guide slope.

9. The switchgear according to claim 1, characterized in that The mounting bracket is equipped with reinforcing ribs.

10. The switchgear according to claim 1, characterized in that The guide rail groove is a C-shaped groove, and the snap-fit ​​part snaps into the C-shaped groove.

Images