High-firmness air conditioner outdoor unit screw

Abstract

The utility model relates to the technical field of screws, and discloses a high-firmness air conditioner outdoor unit screw which comprises a screw end and a screw rod part, the bottom end of the screw rod part is connected to the inner side of the screw end and fixed to the inner side of the screw end, the screw rod part is a cylindrical rod body, and the top end of the screw rod part is gradually folded to form a circular truncated cone shape and is a plane. A circle of annular groove is formed in the inner side of the screw end around the bottom end of the screw rod portion, and the depth of the annular groove is 0.75 mm. The top of the screw is a plane, when the screw is used, the top of the screw is prevented from scratching the outer wall of an air conditioner and affecting a protective layer of an outdoor unit, installation personnel can be prevented from being scratched, and safety is high during operation. The annular groove is formed in the end of the screw, so that threads at the bottom end of the screw rod are more complete, and the fastening performance is higher after the screw is tightened. The threads on the threaded rod part of the device are of a two-side double-line spiral structure, the angle is increased, the contact area locked with a metal plate is large, and after the screw is screwed down, the firmness is higher, and the stability of the device is higher.

Description

Technical Field

[0001] The utility model relates to the field of screws, in particular to a high-firmness screw for an air conditioner exterior unit. Background Art

[0002] The air conditioner outdoor unit is installed on the outer wall of the wall. Whether the installation is firm affects the safety of the outdoor unit. The screw thread at the bottom end of the existing air conditioner outdoor unit screw rod lacks integrity, which affects the locking effect of the screw.

[0003] The patent application with publication number CN207421092U discloses an anti-loosening self-tapping screw, wherein a stud is fixedly connected to the lower end of the self-tapping screw cap, a first auxiliary fixing piece is fixedly connected to the lower end of the self-tapping screw cap, and the upper end of the stud crosses the interior of the first auxiliary fixing piece, the first auxiliary fixing piece includes a fixing rivet and a washer, the fixing rivet is symmetrically and evenly installed at the lower end of the washer, a connecting piece is fixedly connected to the upper end of the washer, a second auxiliary fixing piece is symmetrically fixedly installed on both sides of the self-tapping screw cap, the second auxiliary fixing piece includes a fixed base and a fixed bracket, a rotating shaft is rotatably installed inside the fixed base, the fixed bracket is fixedly connected to one end of the rotating shaft, two fixing holes are symmetrically arranged on the fixed bracket, a hook is fixedly installed on the upper end of one side of the fixed bracket, and a thread is arranged on the stud.

[0004] The top of the prior art stud is relatively sharp, and the top of the screw is easy to scratch the equipment, affecting the protective layer of the equipment, and is also easy to scratch the installer.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The utility model aims to provide a high-firmness screw for an air conditioner outdoor unit. A groove is arranged at the screw end to make the screw thread more complete and the screw has stronger tightness when used. The thread on the threaded rod adopts a double-line spiral structure on both sides, and the angle becomes higher, so the contact area with the sheet metal locking is large. After the screw is tightened, the firmness is higher and the device stability is stronger.

[0007] The technical solution adopted by the utility model is:

[0008] A high-strength air conditioner outdoor screw comprises a screw end and a screw rod. The bottom end of the screw rod is connected to the inner side of the screw end and fixed to the inner side of the screw end. The screw rod is a cylindrical rod body. The top end of the screw rod gradually converges to form a truncated cone shape, and the top end is a plane.

[0009] By adopting the above structure, the top of the screw is a frustum and the top is a plane. When the screw is used, the top of the screw is prevented from scratching the outer wall of the air conditioner and affecting the protective layer of the external unit. It can also prevent the installer from being scratched, and the operation is highly safe.

[0010] Preferably, an annular groove is provided on the inner side of the screw end around the bottom end of the screw shaft, and the depth of the annular groove is 0.75 mm.

[0011] By adopting the above structure and providing the annular groove, the thread at the bottom end of the screw shank is made more complete, and the tightness of the screw is higher after being tightened.

[0012] Preferably, a cross groove is provided on the outer side of the screw end, and the cross groove depth is 2±0.25 mm.

[0013] Preferably, the screw shank is provided with a screw thread, the thread end of the screw thread is close to the connection between the screw shank and the screw head, and the thread end extends into the annular groove.

[0014] By adopting the above structure, the first teeth of the screw thread are more complete, and the tightness of the screw is higher after being tightened.

[0015] Preferably, the top of the screw thread extends to the truncated cone-shaped end at the top of the screw shank.

[0016] Preferably, the screw thread is a double-line spiral structure on both sides, the spiral angle a on both sides is 64°, the thread inclination angle c of the screw thread is 14°, and the distance P between adjacent threads is 1.4 mm.

[0017] By adopting the above structure, the screw thread adopts a double-line spiral structure on both sides, and the thread angle is set to 14°. Compared with the existing single-line spiral structure with an angle of about 7°, after the screw is tightened, the contact area with the sheet metal locking is large, the firmness is higher, and the device stability is stronger.

[0018] Preferably, the top angle b of the top cone of the screw shank is 30°±5°.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The top of the screw of the utility model is flat. When the screw is used, it can avoid the top of the screw scratching the outer wall of the air conditioner and affecting the protective layer of the external unit. It can also avoid scratching the installer, and the safety is high during operation.

[0021] 2. The screw end of the utility model device is provided with an annular groove, so that the thread at the bottom end of the screw rod is more complete, and the tightness of the screw is higher after being tightened.

[0022] 3. The threads on the threaded rod of the device of the utility model adopt a double-line spiral structure on both sides, and the angle becomes higher, and the contact area with the sheet metal locking is large. After the screws are tightened, the firmness is higher and the device stability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the cross groove structure of the screw end of the utility model;

[0027] Figure 4 For this utility model Figure 1 Schematic diagram of the structure at A in the middle.

[0028] Among them: 1. Screw end; 2. Screw shaft; 3. Screw thread; 4. Top of the screw shaft; 5. Annular groove; 6. Cross groove at the end; 7. End of the thread; 8. Top of the thread. DETAILED DESCRIPTION

[0029] like Figure 1-4 As shown, the high-firmness air conditioner external machine screw includes a screw end 1 and a screw shank 2. The bottom end of the screw shank 2 is connected to the inner side of the screw end 1 and fixed to the inner side of the screw end 1. The screw shank 2 is a cylindrical rod body. The top of the screw shank 2 gradually closes to form a truncated cone shape, and the top is a plane. The top angle b of the top truncated cone of the screw shank 2 is 30°±5°. The top of the screw is a plane. When the screw is used, the top of the screw is prevented from scratching the outer wall of the air conditioner and affecting the protective layer of the external machine. It can also prevent the installer from being scratched. During operation, it is highly safe.

[0030] A circle of annular groove 5 is provided on the inner side of the screw end 1 around the bottom end of the screw shank 2, and the depth of the annular groove 5 is 0.75 mm. A cross groove 6 is provided on the outer side of the screw end 1, and the depth of the cross groove 6 is 2±0.25 mm. The annular groove 5 is provided on the screw end 1, so that the thread at the bottom end of the screw shank 2 is more complete, and the tightness of the screw is higher after being tightened.

[0031] The screw shank 2 has a screw thread 3, and the thread end 7 of the screw thread 3 is close to the connection between the screw shank 2 and the screw head 1, and the thread end 7 extends into the annular groove 5. The thread top 8 of the screw thread 3 extends to the truncated cone-shaped end at the top of the screw shank 2. The screw thread 3 is a double-line helical structure on both sides, and the spiral angle a on both sides is 64°. The thread inclination angle c of the screw thread 3 is 14°, and the pitch P between adjacent threads is 1.4mm. The top angle b of the top truncated cone of the screw shank 2 is 30°±5°. The screw thread adopts a double-line helical structure on both sides, and the thread angle is set to 14°. Compared with the existing single-line helical structure with an angle of about 7°, after the screw is tightened, the contact area with the sheet metal locking is large, the firmness is higher, and the device stability is stronger.

[0032] When the device is used, the thread adopts a double-line spiral structure on both sides, and the thread angle is higher than the existing single-line spiral angle design value of 7°. In addition, an annular groove 5 is provided at the screw end 1 to make the thread at the bottom end of the screw shaft 2 more complete. After the screw is tightened, the contact area between the screw and the sheet metal is larger, the device is more stable, and the fastening is stronger. As shown in the following table, the slipping torque becomes larger, and the device has better fastening performance, is not easy to slip, and will not slip.

[0033]

[0034] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should be included in the protection scope determined by the claims of the present invention.

Claims

1. A high-firmness screw for an air conditioner exterior unit, comprising a screw head and a screw shank, characterized in that: The bottom end of the screw rod is connected to the inner side of the screw head and fixed to the inner side of the screw head. The screw rod is a cylindrical rod body. The top end of the screw rod gradually converges to form a truncated cone shape, and the top end is a plane.

2. The high-strength air conditioner exterior screw according to claim 1, characterized in that: A circle of annular groove is arranged on the inner side of the screw end around the bottom end of the screw rod, and the depth of the annular groove is 0.75 mm.

3. The high-strength air conditioner exterior screw according to claim 1, characterized in that: A cross groove is arranged on the outer side of the screw end, and the cross groove depth is 2±0.25mm.

4. The high-strength air conditioner exterior screw according to claim 2, characterized in that: The screw shank is provided with a screw thread, the thread end of which is close to the connection between the screw shank and the screw head, and the thread end extends into the annular groove.

5. The high-strength air conditioner exterior screw according to claim 4, characterized in that: The top of the screw thread extends to the truncated cone-shaped end at the top of the screw shank.

6. The high-strength air conditioner exterior screw according to claim 4, characterized in that: The screw thread is a double-line spiral structure on both sides, the spiral angle a on both sides is 64°, the thread inclination angle c of the screw thread is 14°, and the adjacent thread spacing P is 1.4 mm.

7. The high-strength air conditioner exterior screw according to claim 1, characterized in that: The top end angle b of the frustum at the top end of the screw shank is 30°±5°.

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