A double-end bolt for hanging a home appliance

Abstract

The application discloses a double-end bolt for household appliance hanging, relates to the technical field of fasteners, and comprises a first threaded section and a second threaded section at both ends of a bolt rod body, wherein a light rod section is arranged between the first threaded section and the second threaded section, the cross section of the light rod section is a non-circular structure, and an integrally-formed annular boss is arranged on the light rod section. The application solves the problem that the bolt rotates with a nut when the nut is tightened through the anti-rotation cooperation between the non-circular light rod section and a hanging rack hole, realizes efficient single-person installation, provides mechanical and friction double-looseness prevention guarantees through the integrated annular boss and a rough end face, and ensures the safety of long-term suspension of household appliances.

Description

Technical Field

[0001] This application relates to the field of fastener technology, and in particular to a double-ended bolt for mounting household appliances. Background Technology

[0002] Currently, double-ended bolts (also known as "expansion screws" or "pry bolts") are commonly used as connectors for wall-mounted appliances. Typically, one end is screwed into an expansion tube or fastener inside the wall, and the other end passes through the mounting hole on the back of the appliance and is secured with a nut.

[0003] Existing standard double-ended bolts have the following defects:

[0004] After hanging the appliance, the bolt tends to rotate when tightening the outer nut. This requires one person to hold the bolt on the inside while another operates on the outside, which is extremely inconvenient for single-person installation. Furthermore, the bolt rotation can easily lead to insufficient preload and poor anti-rotation capability. Additionally, the length of the bolt extending beyond the wall is difficult to control precisely during installation, potentially resulting in uneven gaps between the appliance and the wall or failure to hang it properly.

[0005] Therefore, there is an urgent need for a double-ended bolt for wall mounting of home appliances that can solve the above problems and enable fast, reliable installation by a single person. Utility Model Content

[0006] To address the aforementioned problems, this application provides a double-ended bolt for mounting household appliances.

[0007] The double-ended bolt for mounting household appliances provided in this application adopts the following technical solution:

[0008] A double-ended bolt for mounting household appliances includes a first threaded section and a second threaded section at both ends of the bolt shank, with a smooth section between the first threaded section and the second threaded section. The smooth section has a non-circular cross-section and an integrally formed annular boss on the smooth section.

[0009] By adopting the above technical solution, the screw can be effectively prevented from rotating during installation, which facilitates the installation of the entire bolt.

[0010] Preferably, the non-circular structure is a hexagonal structure.

[0011] By adopting the above technical solution, it can be tightly matched with the corresponding size hexagonal hole (or specific part of the U-shaped groove) on the appliance bracket to transmit torque, thereby preventing the entire bolt from rotating when tightening the nut.

[0012] Preferably, the annular boss is located at one end of the smooth rod section near the first threaded section.

[0013] By adopting the above technical solution, it serves as a depth limit for bolts to penetrate into the wall, ensuring that all bolts extend from the wall at the same length, facilitating successful installation of home appliances in one go, increasing the contact area with the appliance bracket, eliminating the need for additional gaskets, and preventing damage to the bracket hole wall.

[0014] Preferably, the annular boss has an anti-slip surface on the side of the cross-section near the second threaded section, and the anti-slip surface is a rough surface or a serrated surface.

[0015] By adopting the above technical solutions, a dual anti-loosening guarantee of mechanical and friction is provided, ensuring the safety of home appliances during long-term hanging.

[0016] Preferably, the end of the second threaded segment is provided with a guide portion, which is a tapered or hemispherical end.

[0017] By adopting the above technical solution, it is easier to guide the insertion of the bracket hole.

[0018] Preferably, a limiting groove is formed on the side wall of the optical rod segment, and a snap-fit ​​module is detachably slidably connected to the outer wall of the optical rod segment.

[0019] By adopting the above technical solution, the replacement needs of different appliance brackets and appliance mounting hole types can be met, and appropriate snap-fit ​​modules can be selected according to the hole types of different structures.

[0020] Preferably, the external structure of the snap-fit ​​module is square or D-shaped, and the inner wall of the snap-fit ​​module is provided with a limiting block that matches the limiting groove.

[0021] By adopting the above technical solution, the limiting installation of the snap-fit ​​module can be facilitated.

[0022] Preferably, the size of the smooth rod segment is larger than the size of the second threaded segment, but smaller than the size of the annular boss.

[0023] By adopting the above technical solution, it can be ensured that the annular boss can contact the home appliance to provide anti-slip function, while facilitating the assembly and disassembly of the snap-fit ​​module.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Operable by a single person: The anti-rotation fit between the non-circular smooth rod section and the bracket hole completely solves the problem of bolt rotation when tightening nuts, enabling efficient single-person installation.

[0026] 2. High reliability in preventing loosening: The integrated annular boss and its rough end face provide dual anti-loosening protection through mechanical and frictional means, ensuring the safety of home appliances during long-term hanging.

[0027] 3. Convenient and precise installation: The limiting effect of the annular boss ensures uniform installation depth, and the tapered tail facilitates guidance, greatly simplifying the installation process and improving the hanging accuracy and success rate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a double-ended bolt for mounting household appliances, according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram illustrating a partial cross-sectional structure, representing a key embodiment of this application.

[0030] Figure 3 This is a schematic diagram illustrating the side structure of the snap-fit ​​module and the second threaded section, which is the main embodiment of this application.

[0031] Reference numerals in the attached drawings: 1. First threaded section; 2. Smooth rod section; 3. Second threaded section; 4. Annular boss; 5. Anti-slip surface; 6. Limiting groove; 7. Snap-fit ​​module; 8. Nut; 9. Guide part; 10. Limiting block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0033] This application discloses a double-ended bolt for mounting household appliances.

[0034] Reference Figure 1 , Figure 2 A double-ended bolt for mounting household appliances includes a first threaded section 1 and a second threaded section 3 at both ends of the bolt shank. A smooth section 2 is provided between the first threaded section 1 and the second threaded section 3. The cross-section of the smooth section 2 is a non-circular structure, which is a hexagonal structure. An integrally formed annular boss 4 is provided on the smooth section 2. The annular boss 4 is located at the end of the smooth section 2 near the first threaded section 1.

[0035] Reference Figure 1 The annular boss 4 has an anti-slip surface 5 on one side of the cross section near the second threaded section 3. The anti-slip surface 5 is a rough surface or a sawtooth surface, which is formed by knurling or tooth pressing.

[0036] Reference Figure 1 and Figure 2 The end of the second threaded section 3 is provided with a guide part 9, which is tapered or hemispherical to facilitate the insertion of the bracket hole.

[0037] Reference Figure 2-3 A limiting groove 6 is provided on the side wall of the bare rod section 2. A snap-fit ​​module 7 is detachably slidably connected to the outer wall of the bare rod section 2. The external structure of the snap-fit ​​module 7 is square or D-shaped, and a limiting block 10 adapted to the limiting groove 6 is provided on the inner wall of the snap-fit ​​module 7.

[0038] Reference Figure 1 and Figure 2 The size of the smooth rod section 2 is larger than the size of the second threaded section 3, but smaller than the size of the annular boss 4. Specifically, the outer diameter of the boss is larger than the outer diameter of the smooth rod section 2, and is also usually larger than the mounting hole diameter of the appliance bracket 9.

[0039] The implementation principle of a double-ended bolt for appliance mounting according to an embodiment of this application is as follows: In use, first, the first threaded section 1 is fully screwed into the expansion tube already fixed in the wall until the annular boss 4 is tightly against the wall. At this time, the length of all bolts extending beyond the wall is uniformly limited by the annular boss 4, ensuring consistency. Then, the mounting hole (non-circular hole) of the appliance bracket is aligned and fitted onto the non-circular smooth section 2 of the bolt or the snap-fit ​​module 7. Due to its non-circular anti-rotation design, the bolt will not rotate. A nut 8 is then screwed onto the second threaded section 3 and tightened using a tool. The nut 8 will press the appliance bracket tightly against the anti-slip surface 5 of the annular boss 4, forming good anti-loosening friction. Once installation is complete, the appliance can be reliably hung on the wall.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-end bolt for hanging an electric home appliance, characterized by: It includes a first threaded section (1) and a second threaded section (3) at both ends of the bolt shank. A smooth section (2) is provided between the first threaded section (1) and the second threaded section (3). The cross-section of the smooth section (2) is a non-circular structure. An integrally formed annular boss (4) is provided on the smooth section (2).

2. The double-end bolt for hanging a home appliance according to claim 1, wherein: The non-circular structure is a hexagonal structure.

3. The double-end bolt for hanging a home appliance according to claim 2, wherein: The annular boss (4) is located at one end of the smooth rod section (2) near the first threaded section (1).

4. The double-ended bolt for mounting household appliances according to claim 3, characterized in that: The annular boss (4) has an anti-slip surface (5) on one side of the cross section near the second threaded section (3). The anti-slip surface (5) is a rough surface or a sawtooth surface.

5. The double-end bolt for hanging a home appliance according to claim 4, wherein: The end of the second threaded section (3) is provided with a guide part (9), which is a tapered end or a hemispherical end.

6. A double-ended bolt for mounting household appliances according to claim 5, characterized in that: A limiting groove (6) is provided on the side wall of the optical rod section (2), and a snap-fit ​​module (7) is detachably slidably connected to the outer wall of the optical rod section (2).

7. A double-ended bolt for mounting household appliances according to claim 6, characterized in that: The external structure of the snap-fit ​​module (7) is square or D-shaped, and the inner wall of the snap-fit ​​module (7) is provided with a limiting block (10) that is compatible with the limiting groove (6).

8. The double-end bolt for hanging a home appliance according to claim 7, wherein: The size of the smooth rod section (2) is larger than the size of the second threaded section (3) and smaller than the size of the annular boss (4).

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