Range hood and hinge assembly thereof

Abstract

The utility model relates to the technical field of range hoods, in particular to a range hood and a hinge assembly thereof, and aims to solve the problem that an existing hidden hinge is complex in structure. The hinge assembly comprises a first hinge and a second hinge, wherein a rotating shaft supporting seat is arranged on the first hinge; the second hinge comprises a first part and a second part, the first part is provided with a first rotating shaft, the second part is provided with a second rotating shaft, the first rotating shaft can be inserted into the rotating shaft supporting seat in the first direction, the second rotating shaft can be inserted into the rotating shaft supporting seat in the second direction, and the first direction is opposite to the second direction. The first rotating shaft and the second rotating shaft are collinear, and the first part and the second part are spliced into an integrated structure and can be opened and closed relative to the first hinge. According to the hinge assembly provided by the utility model, the attractiveness of the hinge is improved, the hinge structure is simplified, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and specifically provides a range hood and a hinge assembly thereof. Background Art

[0002] When the range hood is operating, it can provide a suction force to timely suck away the oil fumes generated during the cooking process, reduce the diffusion of oil fumes, and improve the air quality in the kitchen. It has become one of the essential kitchen appliances in family life.

[0003] Some existing range hoods are provided with an openable and closable moving plate assembly, so that the moving plate assembly can be controlled to open when oil fumes need to be sucked, so as to collect the oil fumes as much as possible and improve the oil fume suction efficiency, and the moving plate assembly can be controlled to close when oil fumes do not need to be sucked to keep it beautiful. The opening and closing of the moving plate assembly are inseparable from the swing arm structure or hinge. For example, the patent document with the publication number CN218953082U provides a hidden hinge structure and a side suction range hood, and specifically discloses that: the hidden hinge structure includes: a hinge seat, on one side of which there is a groove, and the hinge seat is used for fixing to the side of the first component; a hinge piece, arranged in the groove and hinged to the hinge seat through a rotating shaft; a connecting piece, used for fixing to the side of the second component, and the connecting piece is detachably connected to the hinge piece; when the hinge piece is closed, the connecting piece is accommodated in the groove. It can be seen that this patent document provides a hidden hinge structure, which can improve the concealment of the hinge and enhance the aesthetics, but the hinge structure is relatively complex.

[0004] Correspondingly, there is a need in the art for a new hinge assembly to solve the above problems. Summary of the Utility Model

[0005] The utility model aims to solve the above technical problems, that is, to solve at least the problem of the complex structure of the existing hidden hinge.

[0006] In a first aspect, the utility model provides a hinge assembly for a range hood, and the hinge assembly includes:

[0007] A first hinge, on which there is a rotating shaft support seat;

[0008] A second hinge, which includes a first part and a second part, the first part is provided with a first rotating shaft, the second part is provided with a second rotating shaft, the first rotating shaft can be inserted into the rotating shaft support seat in a first direction, the second rotating shaft can be inserted into the rotating shaft support seat in a second direction, the first direction and the second direction are opposite, in the installed state, the first rotating shaft and the second rotating shaft are collinear, and the first part and the second part are spliced into an integral structure and can be opened and closed relative to the first hinge.

[0009] In some feasible embodiments of the hinge assembly of the above-mentioned range hood, the first part includes a first plate body and a first extension arm, the first rotating shaft is arranged on the first extension arm, the second part includes a second plate body and a second extension arm, and the second rotating shaft is arranged on the second extension arm.

[0010] In some feasible embodiments of the hinge assembly of the above-mentioned range hood, a protrusion is formed by protruding one end of the first plate body away from the first extension arm, and a groove capable of fitting with the protrusion is formed at one end of the second plate body away from the second extension arm. The protrusion and the groove are spliced so that the first plate body and the second plate body are connected into an integral structure.

[0011] In some feasible embodiments of the hinge assembly of the above-mentioned range hood, the cross-section of the protrusion is triangular; and / or

[0012] The cross-section of the groove is a V-shaped groove.

[0013] In a second aspect, the present invention further provides a range hood, and the range hood includes the hinge assembly of the range hood described in any one of the foregoing technical solutions.

[0014] In some feasible embodiments of the above-mentioned range hood, the range hood includes a front strengthening beam and a movable plate assembly. The front strengthening beam includes a first mounting surface, and the movable plate assembly includes a glass plate and a second mounting surface arranged inside the glass plate. The first hinge is mounted on the first mounting surface, and the second hinge is mounted on the second mounting surface so that the movable plate assembly can be opened and closed relative to the front strengthening beam by means of the hinge assembly.

[0015] In some feasible embodiments of the above-mentioned range hood, the second mounting surface is inclined with respect to the inner side surface of the glass plate.

[0016] In some feasible embodiments of the above-mentioned range hood, the movable plate assembly further includes a control box fixedly connected to the inner side surface of the glass plate, and the second mounting surface is formed on the side wall of the control box.

[0017] In some feasible embodiments of the above-mentioned range hood, the front strengthening beam includes a strengthening beam main body inclined with respect to the vertical surface, and the first mounting surface is formed on the strengthening beam main body; or

[0018] The front strengthening beam includes a strengthening beam main body inclined with respect to the vertical surface, and a boss protrudes from the strengthening beam main body, and the first mounting surface is formed on the boss.

[0019] In some feasible embodiments of the above-mentioned range hood, a first wire threading hole for a wire harness to pass through is formed on the main body of the reinforcing beam, and a first wire protection sleeve is arranged in the first wire threading hole; and / or

[0020] A second wire threading hole for a wire harness to pass through is formed on the side wall, and a second wire protection sleeve is arranged in the second wire threading hole.

[0021] The hinge assembly provided by the present utility model realizes the hiding of the hinge shaft by setting the second hinge as a split structure and connecting it into an integral structure during installation, thereby improving the aesthetics of the hinge. In addition, since the hinge shaft is integrally formed with the second hinge, the hinge structure is simplified and the installation difficulty is reduced.

[0022] The range hood provided by the present utility model can improve the aesthetics after installation due to being configured with the above-mentioned hinge assembly. In addition, by installing the second hinge of the hinge assembly on a second installation surface inclined with respect to the inner side surface of the relative glass plate, compared with the traditional swing arm connection structure, in the case of rotating the same angle, the solution of the present utility model has a fixed rotation axis, reduces the required rotation space, is beneficial to reducing the volume of the range hood, and is more likely to realize the built-in installation of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, in which:

[0024] Figure 1 is a schematic structural view of an embedded range hood provided by an embodiment of the present utility model after being installed in a cabinet, in which the movable plate assembly is shown in an open state;

[0025] Figure 2 is a left view of an embedded range hood provided by an embodiment of the present utility model after being installed in a cabinet, in which the movable plate assembly is shown in an open state;

[0026] Figure 3 is Figure 2 a partial cross-sectional view at A in;

[0027] Figure 4 is an exploded schematic view of a hinge assembly provided by an embodiment of the present utility model;

[0028] Figure 5 is an assembly schematic view of a hinge assembly provided by an embodiment of the present utility model;

[0029] Figure 6 is a side view of the first hinge and the first part of the hinge assembly provided by an embodiment of the present utility model in an assembled state;

[0030] LIST OF REFERENCE NUMERALS

[0031] 1. Cabinet; 11. Side cabinet board; 12. Top cabinet board;

[0032] 2. Range hood; 21. Main box; 22. Smoke collecting hood assembly; 221. Front panel assembly; 2211. Front panel; 2212. Front reinforcement beam; 22121. Reinforcement beam body; 221211. Boss; 222. Glass plate; 223. Control box; 2231. Second mounting surface; 224. Hinge assembly; 2241. First hinge; 22411. Base; 22412. Rotating shaft support seat; 2242. Second hinge; 22421. First part; 224211. First plate body; 224212. First extension arm; 224213. Protrusion; 224214. First rotating shaft; 22422. Second part; 224221. Second plate body; 224222. Second extension arm; 224223. Groove; 224224. Second rotating shaft; 225. Link mechanism; 226. First wire protection sleeve; 227. Second wire protection sleeve; 228. Side plate support frame; 229. Oil mesh. Detailed implementation manners

[0033] The preferred implementation manners of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not used to limit the protection scope of the present utility model. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios. For example, although the following embodiments are described taking an embedded range hood as an example, the technical solutions of the present utility model are equally applicable to other types of range hoods, such as side suction range hoods. Such a change in the application object does not deviate from the gist of the present utility model and should be limited within the protection scope of the present utility model.

[0034] In order to better illustrate the present utility model, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present utility model can also be implemented without some specific details.

[0035] In the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "inner", "outer", "left", "right", etc. are based on the illustrated directions or positional relationships. This is only for the convenience of description and does not indicate or imply that the device to be protected must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the orientations in the following embodiments should not be construed as limitations on the present utility model. In addition, ordinal numbers such as "first" and "second" are only for convenience of description and do not indicate or imply relative importance.

[0036] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation" and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the present utility model, "not shown" means that the corresponding component is not shown in the drawings, and "not labeled" means that the corresponding component is schematically shown in the drawings but not labeled.

[0038] The following specifically describes the built-in range hood and the hinge assembly for the range hood provided by the present utility model with reference to the accompanying drawings.

[0039] As Figures 1 to 3 shown, the built-in range hood 2 provided by the embodiment of the present utility model includes a main box 21 and a smoke collecting hood assembly 22, and the smoke collecting hood assembly 22 is connected to the lower part of the main box 21. Both the main box 21 and the smoke collecting hood assembly 22 are built-in and installed in the cabinet 1, and the cabinet 1 includes side cabinet boards 11 on the left and right, a top cabinet board 12 and a front cabinet board (not shown). A fan (not shown) is provided in the main box 21, and the fan provides power for the air circulation. The smoke collecting hood assembly 22 is used to collect the fumes, and includes a smoke collecting hood housing (not labeled), an oil net 229, etc. are provided in the smoke collecting hood housing, and the smoke collecting hood assembly 22 is also provided with a front panel assembly 221 and a movable panel assembly, and the movable panel assembly is connected to the front panel assembly 221 through a hinge assembly 224.

[0040] Specifically, as Figure 2 and Figure 3 shown, the front panel assembly 221 includes a front panel 2211 and a front reinforcing beam 2212. The front panel 2211 faces the user, and is provided with a display screen, a touch screen or buttons for the user to monitor the operating state of the range hood 2 or issue control commands to the range hood 2, and the front panel 2211 is fixedly installed on the front reinforcing beam 2212. The front reinforcing beam 2212 includes a reinforcing beam body 22121, as Figure 3As shown in the figure, the reinforcing beam body 22121 is inclined relative to the vertical plane, which is not only beneficial to guiding the flow of flue gas, but also beneficial to ensuring that the moving plate assembly has a sufficient opening and closing angle. The top edge of the reinforcing beam body 22121 is bent to form a stepped connecting portion (not labeled), and the two side ends of the stepped connecting portion are used to connect with the side plate support frame 228 to make the space below the oil screen 229 relatively enclosed. The side plate support frame 228 is used to support the side plate (not shown in the figure), and the side plate, the oil screen 229, the front reinforcing beam 2212, etc. enclose a smoke collecting cavity (not labeled). The bottom edge of the reinforcing beam body 22121 is formed into a stepped supporting portion (not labeled) for supporting the front panel 2211 after being bent multiple times, which is beneficial to improving the connection stability between the front panel 2211 and the front reinforcing beam 2212.

[0041] More specifically, as Figure 3 shown in the figure, a boss 221211 is formed on the reinforcing beam body 22121 in the present embodiment of the utility model by protruding inward (away from the front panel 2211) in the direction perpendicular to its surface. The boss 221211 can be constructed by a pressing process. The boss 221211 has an inclined surface, and this surface is parallel to or has an included angle with the surface of the reinforcing beam body 22121, which is defined as the first mounting surface (not labeled) and is used to connect with the first hinge 2241 of the hinge assembly 224. The first hinge 2241 is fixedly connected to the boss 221211 by fasteners such as screws. There are two bosses 221211 formed on the reinforcing beam body 22121 in the present utility model, and the two bosses 221211 are arranged at intervals along the length direction of the range hood 2. Each boss 221211 is connected to a hinge assembly 224. The purpose of setting the boss 221211 is to improve the installation convenience, and because it can make a certain height difference between the first hinge 2241 after installation and the surface of the reinforcing beam body 22121, it can provide a certain movement space for the opening and closing of the moving plate assembly, and avoid interference between the edge of the moving plate assembly close to the hinge assembly 224 and the bottom edge of the reinforcing beam body 22121.

[0042] It should be noted that the boss 221211 is not necessary. The first hinge 2241 can be directly installed on the surface of the reinforcing beam body 22121, as long as it is ensured that the moving plate assembly will not interfere with the reinforcing beam body 22121 during the opening and closing process.

[0043] As Figure 3As shown in the figure, the moving plate assembly includes a glass plate 222 and a control box 223 fixedly connected to the inner side surface of the glass plate 222, for example, the control box 223 is bonded to the glass plate 222 by means of gluing. The glass plate 222 is also fixedly connected with a motor (not shown) and a transmission mechanism. The transmission mechanism in the embodiment of the present utility model is a link mechanism 225, which is driven by the motor and is used to drive the moving plate assembly to open and close around the axis of the hinge assembly 224. The motor is fixedly connected above the side plate support frame 228. In the embodiment of the present utility model, a space for accommodating electrical components such as a circuit board is formed inside the control box 223. Among the four side walls of the control box 223, at least the side wall close to the front reinforcing beam 2212 is inclined relative to the inner surface of the glass plate 222. The outer surface of the inclined side wall is used to connect with the second hinge 2242 of the hinge assembly 224, and this outer surface is defined as the second mounting surface 2231. In the installed state, the first hinge 2241 is installed on the first mounting surface formed on the boss 221211, and the second hinge 2242 is installed on the second mounting surface 2231 formed on the side wall, so that the moving plate assembly can be opened and closed relative to the front reinforcing beam 2212 by means of the hinge assembly 224. Compared with the traditional swing arm connection structure, in the case of rotating the same angle, the solution of the present utility model reduces the required rotation space because the rotation axis is fixed, which is beneficial to reducing the volume of the range hood 2 and making it easier to realize the built-in installation of the range hood 2.

[0044] In the above embodiment, the second mounting surface 2231 is inclined relative to the inner side surface of the glass plate 222. Alternatively, the second mounting surface 2231 can also be set perpendicular to the glass plate 222, as long as it is ensured that the moving plate assembly can reach a predetermined opening and closing angle within the opening and closing range of the hinge assembly 224.

[0045] In addition, as Figure 1 shown in the figure, for the convenience of threading, a first threading hole for the wire harness to pass through is formed on the reinforcing beam main body 22121 of the present embodiment, and a first wire protection sleeve 226 is arranged in the first threading hole. A second threading hole for the wire harness to pass through is formed on the inclined side wall of the control box 223, and a second wire protection sleeve 227 is arranged in the second threading hole. In this way, it can be avoided that the wire harness is worn during the opening and closing process of the moving plate assembly.

[0046] It should be noted that Figure 1 only one hinge assembly 224 is shown in the figure, and another hinge assembly 224 arranged at an interval from this hinge assembly 224 is not shown. In addition, the number of the hinge assemblies 224 is not limited to 2, and can also be any suitable number such as 3, 4, etc. In addition, the number of the link mechanisms 225 can also be one or two.

[0047] As Figure 3As shown in the figure, when the movable plate assembly is opened, the movable plate assembly is inclined, increasing the covering area above the cooking appliance, thereby improving the smoke collection effect. When the movable plate assembly is opened, it can better guide the smoke above the cooking appliance into the smoke exhaust duct. When the movable plate assembly is closed, the bottom surface of the smoke collecting hood assembly 22 is flat, which can enhance the aesthetics of the range hood 2.

[0048] In the embodiment of the present utility model, the hinge assembly 224 has a certain degree of concealment, which is beneficial to improving the visual effect of the movable plate assembly after it is opened.

[0049] Specifically, as Figures 4 to 6 shown in the figure, the hinge assembly 224 provided in the embodiment of the present utility model includes a first hinge 2241 and a second hinge 2242. The first hinge 2241 and the second hinge 2242 are rotationally connected through a rotating shaft provided on the second hinge 2242, so that the movable plate assembly can be opened and closed with this rotating shaft as the rotation center.

[0050] As Figure 4 shown in the figure, the first hinge 2241 includes a base 22411 in the shape of a plate structure, and a rotating shaft support seat 22412 connected to the base 22411 and extending towards one side of the base 22411. The side view of the rotating shaft support seat 22412 is as Figure 6 shown in the figure, approximately cylindrical, and smoothly connected to the base 22411. Two side walls of the rotating shaft support seat 22412 are recessed inward to form a cylindrical shaft hole as Figure 4 shown in the figure, to match with the two rotating shafts provided on the second hinge 2242. It should be noted that this cylindrical shaft hole can be through or non-through, as long as it can ensure that the first rotating shaft 224214 and the second rotating shaft 224224 can be completely inserted. As Figure 6 shown in the figure, the base 22411 is a flat plate structure to facilitate fitting with the first mounting surface of the boss 221211.

[0051] As Figure 4 and Figure 5 shown in the figure, the second hinge 2242 in the present utility model is a split structure, including a first part 22421 and a second part 22422. The first part 22421 includes a first plate body 224211 and a first extension arm 224212. As Figure 6 shown in the figure, the side shape of the first extension arm 224212 is similar to the side shape of the rotating shaft support seat 22412. As Figure 4As shown, the first rotating shaft 224214 is disposed on the first extension arm 224212, and the first rotating shaft 224214 and the first plate body 224211 are on the same side of the first extension arm 224212. Similarly, the second part 22422 includes a second plate body 224221 and a second extension arm 224222, and the second rotating shaft 224224 is disposed on the second extension arm 224222. During installation, the first rotating shaft 224214 can be inserted into the rotating shaft support seat 22412 in a first direction, and the first direction can be, for example, Figure 4 the direction from left to right of the dotted line in the figure, and the second rotating shaft 224224 can be inserted into the rotating shaft support seat 22412 in a second direction, and the second direction can be, for example, Figure 4 the direction from right to left of the dotted line in the figure, and the first direction is opposite to the second direction.

[0052] In the installed state, as shown in Figure 5 the figure, the first rotating shaft 224214 and the second rotating shaft 224224 are collinear, and the first part 22421 and the second part 22422 are spliced into an integral structure and can be opened and closed relative to the first hinge 2241. Specifically, in this embodiment, to ensure that the first part 22421 and the second part 22422 can be more closely connected, a protrusion 224213 is formed protruding from one end of the first plate body 224211 away from the first extension arm 224212. The cross-section of the protrusion 224213 in this embodiment (the cross-section obtained by cutting the first part 22421 with a plane passing through the dotted line in Figure 4 and perpendicular to the first plate body 224211) is triangular, and a groove 224223 capable of adapting to the protrusion 224213 is formed at one end of the second plate body 224221 away from the second extension arm 224222. The cross-section of the groove 224223 in this embodiment (the cross-section obtained by cutting the second part 22422 with a plane passing through the dotted line in Figure 4 and perpendicular to the second plate body 224221) is a V-shaped groove. As shown in Figure 5 the figure, the protrusion 224213 and the groove 224223 are spliced so that the first plate body 224211 and the second plate body 224221 are connected into an integral structure.

[0053] It should be noted that the first direction in the above example is described by taking the example in the figure, and it does not mean that the first direction can only be the direction shown in the figure. The first direction is related to the position and orientation of the hinge assembly 224.

[0054] In addition, the protrusion 224213 and the groove 224223 can also be other adapted shapes. For example, the cross-section of the protrusion 224213 is a semi-circular surface, the cross-section of the groove 224223 is a semi-circular groove, or the cross-section of the protrusion 224213 is square, and the cross-section of the groove 224223 is a square groove, etc. As long as it is ensured that the first plate body 224211 and the second plate body 224221 can be tightly connected.

[0055] During installation, first fixedly connect the first hinge 2241 to the boss 221211 on the main body of the reinforcing beam 22121 through fasteners such as screws, etc. Then fixedly connect the first part 22421 to the second mounting surface 2231 of the moving plate assembly through fasteners such as screws, etc. Then insert the first rotating shaft 224214 of the moving plate assembly with the first part 22421 into the rotating shaft support seat 22412 along the first direction. Finally, insert the second rotating shaft 224224 of the second part 22422 into the rotating shaft support seat 22412 and then tightly connect it to the second mounting surface 2231 through fasteners, thus completing the installation of the hinge assembly 224. The installation of another hinge assembly 224 is the same. When installing multiple hinge assemblies 224, the first parts 22421 of multiple hinges are all installed prior to the second parts 22422.

[0056] The rotating shaft of the hinge assembly provided by the embodiment of the present utility model has stronger concealment, and the processing and installation processes are more convenient. There is no need to install the rotating shaft separately. The structure is simple, the installation is convenient, and it is more aesthetically pleasing.

[0057] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A hinge assembly for an oil fume machine, characterized in that, The hinge assembly includes: A first hinge, on which a rotating shaft support base is provided; A second hinge, which includes a first part and a second part. The first part is provided with a first rotating shaft, and the second part is provided with a second rotating shaft. The first rotating shaft can be inserted into the rotating shaft support base in a first direction, and the second rotating shaft can be inserted into the rotating shaft support base in a second direction. The first direction is opposite to the second direction. In the installed state, the first rotating shaft and the second rotating shaft are collinear. The first part and the second part are spliced into an integral structure and can be opened and closed relative to the first hinge.

2. The hinge assembly of the range hood according to claim 1, characterized in that, The first part includes a first plate body and a first extension arm, and the first rotating shaft is arranged on the first extension arm. The second part includes a second plate body and a second extension arm, and the second rotating shaft is arranged on the second extension arm.

3. The hinge assembly of the range hood according to claim 2, wherein, One end of the first plate body away from the first extension arm protrudes to form a protrusion, and one end of the second plate body away from the second extension arm forms a groove that can be adapted to the protrusion. The protrusion and the groove are spliced so that the first plate body and the second plate body are connected into an integral structure.

4. The hinge assembly of the range hood according to claim 3, wherein The cross-section of the protrusion is triangular; and / or The cross-section of the groove is a V-shaped groove.

5. An oil fume machine, characterized in that, The range hood includes the hinge assembly of the range hood according to any one of claims 1 to 4.

6. The range hood according to claim 5, characterized in that, The range hood includes a front strengthening beam and a moving plate assembly. The front strengthening beam includes a first mounting surface, and the moving plate assembly includes a glass plate and a second mounting surface arranged on the inner side of the glass plate. The first hinge is mounted to the first mounting surface, and the second hinge is mounted to the second mounting surface so that the moving plate assembly can be opened and closed relative to the front strengthening beam by means of the hinge assembly.

7. The range hood according to claim 6, wherein, The second mounting surface is inclined relative to the inner side surface of the glass plate.

8. The range hood according to claim 7, wherein The moving plate assembly further includes a control box fixedly connected to the inner side surface of the glass plate, and the second mounting surface is formed on the side wall of the control box.

9. The range hood according to claim 8, wherein, The front strengthening beam includes a strengthening beam main body inclined relative to the vertical surface, and the first mounting surface is formed on the strengthening beam main body; or The front strengthening beam includes a strengthening beam main body inclined relative to the vertical surface, and the strengthening beam main body protrudes to form a boss, and the first mounting surface is formed on the boss.

10. The range hood according to claim 9, wherein A first wire passing hole for a wire harness to pass through is formed on the strengthening beam main body, and a first wire protection sleeve is arranged in the first wire passing hole; and / or A second wire passing hole for a wire harness to pass through is formed on the side wall, and a second wire protection sleeve is arranged in the second wire passing hole.

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