Door hinge for low-voltage cabinet

Abstract

The utility model relates to the technical field of low-voltage cabinets, in particular to a door hinge used for a low-voltage cabinet, which comprises a first hinge used for being assembled with the side wall of a cabinet frame and a second hinge assembly used for being assembled with the side wall of a cabinet door, the second hinge assembly comprises a cover plate located on the outer side of the side wall of the cabinet door and a supporting piece located on the inner side of the side wall of the cabinet door, the cover plate and the supporting piece are assembled through a fixing screw, the bending part is hinged to the supporting piece, the supporting effect of the hinge on the door plate is improved, the cabinet door is more stable in the opening and closing process, and the service life of the cabinet door is prolonged. The rotating position is located on the side wall of the cabinet door, the opening and closing stability of the cabinet door is improved, the stability and leakproofness are improved, dust and impurities are prevented from entering the cabinet door, welding is replaced with fixing screw assembly, the installation process is simplified, thermal deformation in the welding process is avoided, and the consistency of assembly gaps between the cabinet door and the cabinet frame is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage cabinets, in particular to a door hinge for a low-voltage cabinet. Background Technique

[0002] A low-voltage cabinet is an important power distribution device in the power system. It is mainly used for receiving and distributing electric energy, and performing functions such as controlling, protecting, and monitoring circuits. Low-voltage cabinets are widely used in factories, power stations, commercial buildings and other places, and are key devices to ensure the stable operation of the power system;

[0003] The door hinge of the low-voltage cabinet plays a crucial role in the cooperation between the cabinet frame and the cabinet door. It not only determines the stability of the cabinet door opening, but also affects the sealing condition of the assembly of the cabinet door and the cabinet frame. Poor stability after the door hinge is assembled will cause the cabinet door to loosen and drop when opening and closing, and poor airtightness will cause a large gap between the cabinet door and the cabinet frame after the cabinet door is closed, reducing the dust-proof level, making it easy for dust in the external environment to enter the cabinet body and affecting the electrical components in the cabinet body;

[0004] The door hinge in the prior art includes a first hinge and a second hinge hinged to the first hinge. The first hinge is provided with an oblong hole and is fixedly connected to the side wall of the cabinet frame by screws. The second hinge is welded to the panel of the cabinet door. The first hinge is provided with an oblong hole, which is convenient for adjustment during the installation of the cabinet door, but results in inconsistent assembly gaps between the cabinet door and the cabinet frame. The size of the assembly gap depends on the proficiency of the installer. The difference in the assembly gap leads to problems such as poor opening and closing of the cabinet door; secondly, due to the lack of a positioning structure on the first hinge, it is not convenient for the installer to assemble. During the installation process, the door hinge is prone to sliding down, resulting in uncontrollable assembly gaps and reducing the installation efficiency; furthermore, the second hinge is connected to the cabinet door by welding. The installation process requires professional welding equipment, and the heat generated during the welding process will cause thermal deformation of the cabinet door and the second hinge, thereby affecting the assembly gap between the cabinet door and the cabinet frame and reducing the dust-proof performance. When the local deformation of the welding joint between the cabinet door and the second hinge is too large to be normally assembled with the cabinet frame, the installer needs to adjust the assembly relationship between the first hinge and the cabinet frame to compensate for the thermal deformation, which further increases the assembly gap between the cabinet door and the cabinet frame. Summary of the Utility Model

[0005] In order to improve the airtightness between the cabinet door and the cabinet frame and enhance the dust-proof performance, the present application provides a door hinge for a low-voltage cabinet.

[0006] The door hinge for a low-voltage cabinet provided by the utility model adopts the following technical solutions:

[0007] A door hinge for a low-voltage cabinet, comprising a first hinge for assembling with the side wall of the cabinet frame and a second hinge assembly for assembling with the side wall of the cabinet door. The first hinge has a bent portion protruding in the Y-axis direction. The second hinge assembly includes a cover plate located outside the side wall of the cabinet door and a support member located inside the side wall of the cabinet door. The cover plate and the support member are assembled by fixing screws, and the bent portion is hinged to the support member.

[0008] Preferably, it further includes two groups of rotating shafts. One end of each rotating shaft is connected to the bent portion, and the other end of the rotating shaft is rotatably assembled with the support member. The two groups of rotating shafts are arranged at the upper and lower ends of the support member to form an avoidance space.

[0009] Preferably, the support member is provided with rotating grooves for rotatably assembling with the rotating shafts in the Z-axis direction. There are two groups of rotating grooves, which are respectively located at the upper and lower ends of the support member. The support member is provided with communication holes for threadedly connecting with the fixing screws in the Y-axis direction. The communication holes are located between the two groups of rotating grooves.

[0010] Preferably, one end of the bent portion close to the support member is provided with an arm for connecting with the rotating shaft. An assembly groove is formed in the Y-axis direction of the bent portion to generate the arm, forming an upper arm and a lower arm. The support member is assembled in the assembly groove.

[0011] Preferably, the support member has a protruding extension portion in the X-axis direction. The extension portion is located in the middle of the support member, so that one end of the support member close to the cover plate has a protruding portion.

[0012] Preferably, a groove is formed at one end of the cover plate close to the support member. The groove is arranged in cooperation with the protruding portion. When the cover plate and the support member are assembled, the protruding portion is located in the groove.

[0013] Preferably, the bottom wall of the groove in the Y-axis direction has a protruding pin. The support member is provided with a jack for inserting the pin. When the cover plate and the support member are assembled, the pin is located in the jack.

[0014] Preferably, the second hinge assembly further includes a nut threadedly connected to the fixing screw. A card slot is formed in the Y-axis direction of the support member away from the cover plate, and the nut is assembled in the card slot.

[0015] Preferably, the first hinge further includes a straight arm portion connected to the cabinet frame. The connection portion between the straight arm portion and the bent portion has a connection portion that expands outward along the Y-axis.

[0016] Preferably, the straight arm portion is provided with a limiting block protruding in the Y-axis direction, and a plurality of groups of mounting holes are formed in the Y-axis direction of the straight arm portion. At least two groups of the limiting blocks are provided, and the two groups of the limiting blocks are arranged diagonally.

[0017] The beneficial effects of the present utility model are as follows:

[0018] Through the first hinge arranged in an "L" shape, the supporting effect of the hinge on the door panel is improved, and the stability of the opening and closing of the door panel is improved, making the cabinet door more stable during the opening and closing process, and reducing the shaking and swinging of the cabinet door; Secondly, by installing this hinge, the rotation part is located on the side wall of the cabinet door, improving the stability of the opening and closing of the cabinet door, enhancing the stability and airtightness, making the assembly gap between the cabinet door and the cabinet frame smaller, effectively improving the airtightness of the assembly between the cabinet door and the cabinet frame, and preventing dust and impurities from entering; Furthermore, by the support member abutting against the inner side wall of the cabinet door and the cover plate covering the outer side wall of the cabinet door, and then passing the fixing screw through the cover plate, the side wall of the cabinet door, and the support member, the second hinge is assembled to the side wall of the cabinet door. Using fixing screws for assembly instead of welding simplifies the installation process, avoids the problem of thermal deformation during welding, and ensures the assembly accuracy of the cabinet door and the cabinet frame. Of course, the side wall of the cabinet door is provided with an opening for passing the fixing screw. Using fixing screws for assembly instead of welding reduces the assembly difficulty, reduces thermal deformation, and ensures the consistency of the assembly gap between the cabinet door and the cabinet frame, making the joint between the cabinet door and the cabinet frame neater. Description of the Drawings

[0019] Figure 1 is the three-dimensional view in the embodiment of the present application;

[0020] Figure 2 is the top view in the embodiment of the present application;

[0021] Figure 3 is the first disassembled three-dimensional view in the embodiment of the present application;

[0022] Figure 4 is the second disassembled three-dimensional view in the embodiment of the present application;

[0023] Figure 5 is the three-dimensional view of the support member in the embodiment of the present application;

[0024] Figure 6 is the left view of the first hinge in the embodiment of the present application;

[0025] Figure 7 is the three-dimensional view of the low-voltage cabinet in the embodiment of the present application;

[0026] Figure 8 is Figure 7 the partial enlarged view at A in

[0027] Figure 9It is a schematic diagram of the low-voltage cabinet door being opened in an embodiment of the present application;

[0028] Figure 10 It is Figure 9 a partial enlarged view of part B in

[0029] Explanation of reference numerals: 1. First hinge; 101. Bent portion; 1011. Support arm; 102. Assembly groove; 103. Relief groove; 104. Straight arm portion; 1041. Limit block; 1042. Mounting hole; 105. Connecting portion; 2. Second hinge assembly; 201. Cover plate; 2011. Groove; 2012. Plug; 202. Support member; 2021. Rotation groove; 2022. Communication hole; 2023. Extension portion; 2024. Protrusion; 2025. Insertion hole; 2026. Card slot; 203. Fixing screw; 204. Nut; 3. Rotating shaft; 4. Cabinet door; 5. Cabinet frame; 501. Opening. Detailed implementation manners

[0030] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, so that each technical feature and the overall technical solution of the present application can be intuitively and vividly understood, but it cannot be understood as a limitation on the protection scope of the present application.

[0031] In the description of the present application, if it involves orientation description, such as "upper", "lower", "front", "rear", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present 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, so it cannot be understood as a limitation on the present application. When a certain feature is referred to as "set", "fixed", "connected" to another feature, it can be directly set, fixed, connected to another feature, or indirectly set, fixed, connected to another feature.

[0032] In the description of the present application, if it involves orientation description, the orientation or position relationship indicated by "horizontal", "longitudinal", "vertical", "X-axis", "Y-axis", "Z-axis" is based on the Figure 1 orientation or position relationship shown in the drawings. The X-axis represents the horizontal direction, the Y-axis represents the longitudinal direction, and the Z-axis represents the vertical direction.

[0033] In the description of the present application, if "several" is involved, it means one or more; if "multiple" is involved, it means more than two; if "greater than", "less than", or "exceeding" is involved, it should be understood as not including the corresponding number; if "above", "below", or "within" is involved, it should be understood as including the corresponding number. If "first" or "second" is involved, it should be understood as used to distinguish technical features, rather than indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0034] In addition, unless otherwise defined, the technical terms and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application pertains. The terms used in the present application are only for describing specific embodiments and are not intended to limit the present application. It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0035] Example: As Figure 1 - 10 shown, a door hinge for a low-voltage cabinet includes a first hinge 1 for assembling with the side wall of the cabinet frame 5 and a second hinge assembly 2 for assembling with the side wall of the cabinet door 4. The first hinge 1 has a bent portion 101 protruding in the Y-axis direction, so that the first hinge 1 is arranged in an "L" shape. The second hinge assembly 2 includes a cover plate 201 located outside the side wall of the cabinet door 4 and a support member 202 located inside the side wall of the cabinet door 4. The cover plate 201 is assembled with the support member 202 by a fixing screw 203, and the bent portion 101 is hinged to the support member 202.

[0036] By means of the first hinge 1 arranged in an "L" shape, the supporting effect of the hinge on the door panel is enhanced, the stability of the opening and closing of the door panel is improved, so that the cabinet door 4 is more stable during the opening and closing process, and the shaking and swinging of the cabinet door 4 are reduced; Secondly, by installing this hinge, the rotating part is located on the side wall of the cabinet door 4, which improves the stability of the opening and closing of the cabinet door 4, enhances the stability and airtightness, makes the assembly gap between the cabinet door 4 and the cabinet frame 5 smaller, effectively improves the airtightness of the assembly between the cabinet door 4 and the cabinet frame 5, and prevents dust and impurities from entering; Furthermore, the support member 202 abuts against the inner side wall of the cabinet door 4, the cover plate 201 is covered on the outer side wall of the cabinet door 4, and then the fixing screw 203 is passed through the cover plate 201, the side wall of the cabinet door 4, and the support member 202, so as to assemble the side wall of the cabinet door 4 by means of the second hinge. Using the fixing screw 203 for assembly instead of welding simplifies the installation process, avoids the thermal deformation problem during the welding process, and ensures the assembly accuracy of the cabinet door 4 and the cabinet frame 5. Of course, the side wall of the cabinet door 4 is provided with an opening 501 for passing the fixing screw 203. Using the fixing screw 203 for assembly instead of welding reduces the assembly difficulty, reduces the thermal deformation, and ensures the consistency of the assembly gap between the cabinet door 4 and the cabinet frame 5, making the joint between the cabinet door 4 and the cabinet frame 5 neater.

[0037] Due to the connection method of passing the fixing screw 203 through the cover plate 201, the side wall of the cabinet door 4, and the support member 202, the screwing depth of the fixing screw 203 into the support member 202 determines the assembly stability of the second hinge assembly 2 and the cabinet door 4, and the screwing depth of the fixing screw 203 will affect the hinged manner of the first hinge 1 and the support member 202. In the specific structure of the hinge between the first hinge 1 and the support member 202, this embodiment further includes two groups of rotating shafts 3. One end of the rotating shaft 3 is connected to the bent portion 101, and the other end of the rotating shaft 3 is rotatably assembled with the support member 202. The two groups of rotating shafts 3 are arranged at the upper and lower ends in the Z-axis direction of the support member 202 to form an avoidance space. By arranging two groups of rotating shafts 3 up and down to form an avoidance space for the fixing screw 203 to pass through, it is avoided that when using a single rotating shaft 3, the connection of the rotating shaft 3 from top to bottom affects the screwing depth of the fixing screw 203. The arrangement of the two groups of rotating shafts 3 ensures the screwing depth of the fixing screw 203 and the assembly stability of the support member 202, makes the connection between the second hinge assembly 2 and the cabinet door 4 more firm, and improves the overall assembly stability.

[0038] Furthermore, with respect to the specific structure of the support member 202, a rotation groove 2021 for rotationally assembling with the rotating shaft 3 is provided in the Z-axis direction of the support member 202. Two groups of rotation grooves 2021 are provided and are respectively located at the upper and lower ends of the support member 202. A connecting hole 2022 for threaded connection with the fixing screw 203 is provided in the Y-axis direction of the support member 202. The connecting hole 2022 is located between the two groups of rotation grooves 2021. The stability of the hinge between the support member 202 and the first hinge 1 is ensured by the vertically arranged rotation grooves 2021 and the connecting hole 2022. At the same time, the depth of the fixing screw 203 screwed into the support member 202 is increased to ensure the stability of the assembly of the second hinge assembly 2 and the cabinet door 4.

[0039] In order to avoid mutual interference between the rotating shaft 3 and the fixing screw 203, the connecting hole 2022 and the rotating groove 2021 are not connected to each other, which effectively avoids mutual interference between the rotating shaft 3 and the fixing screw 203 and ensures the independence of the rotating function and the connecting function.

[0040] In terms of the specific structure of the assembly of the first hinge 1 and the rotating shaft 3, an arm 1011 for connecting to the rotating shaft 3 is provided at one end of the bending portion 101 close to the support member 202, and an assembly groove 102 is opened in the Y-axis direction of the bending portion 101 to generate the arm 1011 to form an upper arm 1011 and a lower arm 1011. The support member 202 is assembled in the assembly groove 102, and is connected to one group of rotating shafts 3 thereof through the upper arm 1011, and the lower arm 1011 is connected to another group of rotating shafts 3, thereby ensuring the stability of the hinged assembly of the first hinge 1 and the support member 202 and reducing the shaking of the cabinet door 4 during use.

[0041] Furthermore, in order to reduce the difficulty of manufacturing and assembling the hinge, the support arm 1011 is rotated and bent around the Z axis at one end close to the support member 202 to form a circular ring shape, and one end of the shaft 3 is passed through the support arm 1011 along the Z axis direction to rotate with the rotating groove 2021.

[0042] In order to increase the contact area between the support member and the cabinet door 4, thereby enhancing the stability of the assembly of the cabinet door 4 and the second hinge assembly 2, the support member 202 is provided with an extension portion 2023 protruding in the X-axis direction. The extension portion 2023 is located in the middle of the support member 202, so that one end of the support member 202 close to the cover plate 201 has a protruding portion 2024. A through hole for assembling with the protruding portion 2024 is provided in the side wall of the cabinet door 4. The protruding portion 2024 plays a role in limiting the cabinet door 4, thereby improving the assembly accuracy and assembly stability of the second hinge assembly 2 and the cabinet door 4. After the protruding portion 2024 passes through the through hole, the extension portion 2023 contacts the inner side wall of the cabinet door 4. The side wall of the protruding portion 2024 in the Y-axis direction abuts against the cover plate 201. The cover plate 201, the cabinet door 4, and the support member 202 are connected by fixing screws 203. Of course, when the cover plate 201 abuts against the top wall of the protruding portion 2024, the distance between the cover plate 201 and the extension portion 2023 in the Y-axis direction is equal to the thickness of the side wall of the cabinet door 4, so as to reduce the gap between the cabinet door 4 and the second hinge assembly 2 during assembly, thereby reducing shaking and enhancing the stability of the assembly.

[0043] It is worth mentioning that in order to reduce the interference between the extension portion 2023 and the first hinge 1 when the extension portion 2023 rotates, the assembly groove 102 extends inward along the Y-axis direction, so as to ensure the smooth rotation of the support member 202, thereby ensuring the normal opening and closing of the cabinet door 4.

[0044] In order to improve the assembly accuracy of the cover plate 201 and the support member 202, a groove 2011 is provided at one end of the cover plate 201 close to the support member 202. The groove 2011 is arranged in cooperation with the protruding portion 2024. When the cover plate 201 and the support member 202 are assembled, the protruding portion 2024 is located in the groove 2011. The groove 2011 on the cover plate 201 matches the protruding portion 2024 of the support member 202, ensuring the accurate alignment of the cover plate 201 and the support member 202 during assembly, thereby improving the assembly accuracy of the cover plate 201 and the support member 202, enhancing the connection stability between the cover plate 201 and the support member 202, and reducing the loosening phenomenon after assembly. Secondly, the arrangement of the groove 2011 and the protruding portion 2024 provides a guiding function for the assembly, making the assembly of the cover plate 201 and the support member 202 simpler and faster, reducing the assembly difficulty, and helping to maintain the consistency and standardization of the assembly results.

[0045] In order to further improve the assembly accuracy between the cover plate 201 and the support member 202, the bottom wall of the groove 2011 in the Y-axis direction is provided with a protruding pin 2012. The support member 202 is provided with a jack 2025 for inserting the pin 2012. When the cover plate 201 and the support member 202 are assembled, the pin 2012 is located in the jack 2025. There are two groups of pins 2012, which are arranged vertically. Correspondingly, there are two groups of jacks 2025, and the two groups of jacks 2025 are respectively arranged above and below the communication hole 2022. The design of the pin 2012 and the jack 2025 provides more accurate positioning, ensuring that the cover plate 201 and the support member 202 can be completely aligned during assembly, thus significantly improving the assembly accuracy. Secondly, after the pin 2012 is inserted into the jack 2025, additional fixing points are formed, enhancing the connection stability between the cover plate 201 and the support member 202, reducing relative movement during use, effectively preventing lateral or longitudinal offset of the cover plate 201 during the assembly process, and ensuring the accuracy of the assembly.

[0046] In terms of the specific structure in which the support member 202 and the cover plate 201 are assembled by fixing screws 203, the second hinge assembly 2 further includes a nut 204 threadedly connected to the fixing screws 203. A slot 2026 is provided in the support member 202 in the Y-axis direction away from the cover plate 201, and the nut 204 is assembled in the slot 2026. Through the cooperation of the nut 204 and the fixing screws 203, the processing difficulty and processing cost of threading the through hole are reduced, and the nut 204 is clamped by the slot 2026, which is beneficial to preventing the loosening of the nut 204 and ensuring the stability and reliability of the assembly of the cover plate 201 and the support member 202.

[0047] In order to prevent interference between the fixing screw 203 and the side wall of the assembly groove 102 in the Y-axis direction after the fixing screw 203 passes through the cover plate 201, the cabinet door 4, the support member 202, and is screwed to the nut 204, the first hinge 1 is further provided with a relief groove 103. The relief groove 103 extends and depresses from the side wall of the assembly groove 102 in the Y-axis direction towards the Y-axis direction. The relief groove 103 is used to avoid the fixing screw 203, thereby improving the smoothness of the opening and closing of the cabinet door 4.

[0048] In order to improve the structural strength of the first hinge 1, the first hinge 1 further includes a straight arm portion 104 connected to the cabinet frame 5. The connection portion between the straight arm portion 104 and the bent portion 101 has a connection portion 105 that expands outward along the Y-axis. One end of the connection portion 105 is in arc transition with the straight arm portion 104, and the other end of the connection portion 105 is in arc transition with the bent portion 101. By increasing the structural design of the straight arm portion 104 and the connection portion 105, the structural strength is enhanced and stress concentration is reduced.

[0049] In order to improve the stability of the assembly of the first hinge 1 and the cabinet body and facilitate the installer to assemble the first hinge 1 with the cabinet body, a limiting block 1041 is provided with a protrusion in the Y-axis direction of the straight arm portion 104. A plurality of groups of mounting holes 1042 are formed in the Y-axis direction of the straight arm portion 104. At least two groups of limiting blocks 1041 are provided, and the two groups of limiting blocks 1041 are arranged diagonally. The mounting holes 1042 are used for passing through connecting screws to assemble the first hinge 1 with the cabinet body. Specifically, two groups of limiting blocks 1041 are provided, and two groups of mounting holes 1042 are provided. The two groups of limiting blocks 1041 and the two groups of mounting holes 1042 are arranged in a quadrilateral shape, and the two groups of limiting blocks 1041 are diagonally distributed, and the two groups of mounting holes 1042 are arranged diagonally. Of course, the cabinet frame 5 is provided with four groups of openings 501 corresponding to the limiting blocks 1041 and the mounting holes 1042. When the hinge is assembled with the cabinet frame 5, the straight arm portion 104 of the first hinge 1 is in contact with the cabinet body. At this time, the two groups of limiting blocks 1041 are assembled in the two groups of openings 501, which plays a role of pre-positioning the first hinge 1 and simultaneously limits the installation position of the first hinge 1. Then, the connecting screws are passed through the two groups of mounting holes 1042 and are threadedly connected to the other two groups of openings 501 of the cabinet body. Since the cabinet door 4 and the second hinge assembly 2 are connected by screws instead of welding, the thermal deformation amount can be controlled. At this time, the first hinge 1 does not need to be adjusted to fit the installation of the cabinet door 4. Through the design of the limiting block 1041, the assembly difficulty of the first hinge 1 and the cabinet frame 5 is reduced, and the assembly accuracy of the first hinge 1 and the cabinet frame 5 is improved, so that the controllability of the assembly of the first hinge 1 and the cabinet frame 5 is improved, and the consistency of the assembly gap between the cabinet door 4 and the cabinet body is improved. Furthermore, by ensuring the design gap during the structural design, the assembly gap during installation can be controlled, so as to ensure the effective implementation of the dust-proof effect. It is worth mentioning that the mounting holes 1042 are round holes.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A door hinge for a low voltage cabinet, characterized in that: It includes a first hinge for assembling with the side wall of the cabinet frame and a second hinge assembly for assembling with the side wall of the cabinet door. The first hinge has a protruding bending portion in the Y-axis direction. The second hinge assembly includes a cover plate located on the outer side of the cabinet door side wall and a support member located on the inner side of the cabinet door side wall. The cover plate and the support member are assembled by fixing screws, and the bending portion is hinged to the support member.

2. A door hinge for a low voltage cabinet according to claim 1, characterized in that: It also includes two groups of rotating shafts, one end of which is connected to the bending portion, and the other end of which is rotatably assembled with the support member. The two groups of rotating shafts are arranged at the upper and lower ends of the support member to form an avoidance space.

3. A door hinge for a low voltage cabinet according to claim 2, characterized in that: The support member is provided with a rotation groove in the Z-axis direction for rotationally assembling with the rotating shaft, and the rotation groove is provided in two groups and is respectively located at the upper and lower ends of the support member. The support member is provided with a connecting hole in the Y-axis direction for threaded connection with the fixing screw, and the connecting hole is located between the two groups of the rotation grooves.

4. A door hinge for a low voltage cabinet according to claim 3, characterized in that: An arm for connecting with the rotating shaft is arranged at one end of the bending portion close to the supporting member, and an assembly groove is provided in the Y-axis direction of the bending portion to generate the arm to form an upper arm and a lower arm, and the supporting member is assembled in the assembly groove.

5. The door hinge for a low voltage cabinet according to claim 1, characterized in that: The support member has a protrusion in the X-axis direction and an extension portion, the extension portion is located in the middle of the support member, and the support member has a protrusion at one end close to the cover plate.

6. A door hinge for a low voltage cabinet according to claim 5, characterized in that: A groove is formed at one end of the cover plate close to the support member, and the groove is matched with the protrusion. When the cover plate and the support member are assembled, the protrusion is located in the groove.

7. A door hinge for a low voltage cabinet according to claim 6, characterized in that: The bottom wall of the groove in the Y-axis direction has a protrusion with a latch, and the support member is provided with a plug hole for inserting the latch. When the cover plate is assembled with the support member, the latch is located in the plug hole.

8. The door hinge for a low voltage cabinet according to claim 1, characterized in that: The second hinge assembly further comprises a nut threadably connected to the fixing screw, the support member is provided with a slot in the Y-axis direction away from the cover plate, and the nut is assembled in the slot.

9. A door hinge for a low voltage cabinet according to claim 1, characterized in that: The first hinge also includes a straight arm portion connected to the cabinet frame, and the connection between the straight arm portion and the bent portion has a connection portion extending outward along the Y-axis.

10. A door hinge for a low voltage cabinet according to claim 9, characterized in that: The straight arm portion has a protruding limit block in the Y-axis direction, and the straight arm portion has a plurality of mounting holes in the Y-axis direction. There are at least two groups of limit blocks, and the two groups of limit blocks are arranged diagonally.

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