CN220204311U

CN220204311U - Screw structure and air conditioner

Info

Publication number: CN220204311U
Application number: CN202321592212.4U
Authority: CN
Inventors: 吕波
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-12-19
Anticipated expiration: 2033-06-20

Abstract

The utility model discloses a screw structure and an air conditioner, wherein the screw structure comprises a locking part, a self-tapping part, a first thread and a second thread, wherein the self-tapping part is arranged at one end of the locking part, and at least part of the self-tapping part gradually reduces in diameter in the direction away from the locking part; the first thread is arranged around the locking part and the self-tapping part; the second screw thread encircles and sets up in locking portion, and the second screw thread is parallel and in the axial of locking portion interval setting with first screw thread. According to the screw structure, the number of screw turns on the locking part can be increased by arranging the first screw thread and the second screw thread, the reliability of threaded connection is improved, the number of rotation turns during the installation of the screw structure can be reduced, and the installation efficiency is improved.

Description

Screw structure and air conditioner

Technical Field

The utility model relates to the field of fasteners, in particular to a screw structure and an air conditioner.

Background

The self-tapping screw is a common fastener, can be self-locked, is simple to manufacture, has low requirement on a workpiece to be fixed, does not need to be provided with threads, and can be tapped in the workpiece when being screwed into the workpiece, so that the self-tapping screw is widely applied in batch in multiple fields such as household appliances.

The tapping screw with larger screw pitch is easy to tap, the installation efficiency is high, but the number of turns of threads meshed with a workpiece is small, and the tapping screw is easy to slide and loose. The self-tapping screw with smaller screw pitch has a plurality of rotation turns during installation, and the installation efficiency is low.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to propose a screw structure. According to the screw structure, the number of screw turns on the locking part can be increased by arranging the first screw thread and the second screw thread, the reliability of threaded connection is improved, the number of rotation turns during the installation of the screw structure can be reduced, and the installation efficiency is improved.

The utility model also provides an air conditioner with the screw structure.

The screw structure according to the present utility model includes a locking portion; the self-tapping part is arranged at one end of the locking part, and at least part of the self-tapping part gradually reduces in diameter in the direction away from the locking part; the first thread is arranged around the locking part and the self-tapping part; the second threads are arranged around the locking part in a surrounding mode, are parallel to the first threads and are arranged at intervals in the axial direction of the locking part.

According to the screw structure of the present utility model, the self-tapping portion is a portion of the screw structure that is in contact with the workpiece first when the screw structure is screwed into the workpiece, and by configuring the self-tapping portion so that the diameter is gradually reduced in a direction away from the locking portion at least in part, the area of the self-tapping portion can be reduced, thereby increasing the pressure on the workpiece, and making it easy for the screw structure to be screwed into the workpiece through the self-tapping portion. The locking part is a part of the bolt structure which is in threaded fit with the workpiece after being screwed into the workpiece. The screw thread on the self-tapping portion is first screw thread, and the screw thread on the locking portion is formed by first screw thread and second screw thread combination, therefore the screw thread number of turns on the locking portion is greater than the screw thread number of turns on the self-tapping portion, the screw thread number of turns that the locking portion and work piece meshed are increased, meshing reliability is improved, sliding teeth and loosening risks are reduced, and the number of turns of screws in the process of installing the screw structure can be reduced by two screw threads, so that installation efficiency is improved. In addition, the threads matched with the first threads on the workpiece are tapped by the self-tapping part, and the threads matched with the second threads on the workpiece are tapped by the locking part, so that the threads on the workpiece are tapped by the self-tapping part and the locking part together, and the two threads on the workpiece are tapped by the self-tapping part and the locking part in sequence along with the increase of the depth of screwing the bolt structure into the workpiece, so that the process of screwing the bolt structure into the workpiece is more labor-saving.

According to some embodiments of the utility model, the self-tapping portion comprises: the diameter of the tapping part is equal to that of the locking part, and the tapping part is arranged at one end of the locking part; the guide part is arranged at the free end of the tapping part, and the diameter of the guide part gradually decreases in the direction away from the locking part; the first thread is arranged around the locking part, the tapping part and the guiding part.

According to some embodiments of the utility model, the pitch of the first thread is equal to the pitch of the second thread, and the distance between the first thread and the second thread in the axial direction is equal to 1/2 of the pitch of the first thread.

According to some embodiments of the utility model, the number of turns of the first thread on the tap portion is s and satisfies: s is more than or equal to 2.

According to some embodiments of the utility model, the screw structure further comprises: the nut, the nut set up in the other end of locking portion, the nut with be formed with convex spacing portion on the fitting surface that locking portion is connected, spacing portion encircle in locking portion periphery extends.

According to some embodiments of the utility model, the limiting portions are configured as a plurality of spaced-apart limiting portions, and the plurality of limiting portions are rotationally symmetrical about the center of the locking portion.

According to some embodiments of the utility model, the stop portion has a gradually decreasing cross-sectional area in a direction away from the mating surface.

The air conditioner according to the present utility model is briefly described as follows.

An air conditioner according to the present utility model includes a first housing; the second shell is arranged on the first shell; the screw structure of any one of the above embodiments, wherein the screw structure passes through the first housing and the second housing to fixedly connect the first housing and the second housing.

An air conditioner according to the present utility model includes the screw structure described in any one of the embodiments above. Since the air conditioner according to the present utility model includes the screw structure described in any one of the embodiments described above, according to the air conditioner of the present utility model, the installation efficiency of the screw structure is high, the assembly cycle of the air conditioner can be shortened, and the screw structure is engaged with the first casing and the second casing respectively with a large number of screw turns, so that the first casing and the second casing can be fixedly connected reliably, and the quality level of the air conditioner is high.

According to some embodiments of the present utility model, the screw structure is provided with a nut, the nut is disposed at the other end of the locking portion, a protruding limiting portion is formed on a mating surface where the nut is connected with the locking portion, the limiting portion extends around the periphery of the locking portion, the nut is abutted against the first housing, a distance between the limiting portion protruding from the mating surface is h, and a thickness δ of the first housing is: h is less than or equal to 1/2 delta.

According to some embodiments of the utility model, a first mating hole is formed on the first housing, a second mating hole communicated with the first mating hole is formed on the second housing, and the locking part is accommodated in the first mating hole and the second mating hole so as to fixedly connect the first housing with the second housing; the length of the locking part is s1, the sum of the lengths of the first matching hole and the second matching hole is s2, and the requirements are satisfied: s1 is greater than or equal to s2.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a side view of a screw structure according to one embodiment of the present utility model;

FIG. 2 is a schematic structural view of a screw structure according to one embodiment of the present utility model;

FIG. 3 is another perspective structural schematic view of a screw structure according to one embodiment of the present utility model;

FIG. 4 is a front view of a screw configuration according to one embodiment of the present utility model;

FIG. 5 is a schematic illustration of the mating of the screw structure, first housing and second housing according to one embodiment of the utility model;

fig. 6 is a schematic view of a first housing and a second housing according to one embodiment of the utility model.

Reference numerals:

a screw structure 10;

a locking part 101;

a self-tapping portion 102, a tapping portion 1021, and a guide portion 1022;

a first thread 103, a second thread 104;

nut 105, mating face 1051, stop 1052;

a first housing 11, a first fitting hole 111;

the second housing 12, the second fitting hole 121.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the related art, a tapping screw with larger screw pitch is easy to tap, the installation efficiency is high, but the number of turns of threads meshed with a workpiece is small, and the tapping screw is easy to slide and loose. The tapping screw with smaller screw pitch has a plurality of rotation turns during tapping, and the installation efficiency is low.

A screw structure 10 according to an embodiment of the present utility model is described below with reference to fig. 1-4.

As shown in fig. 1, the screw structure 10 according to the present utility model includes a locking portion 101, a tap portion 102, a first thread 103, and a second thread 104, the tap portion 102 being provided at one end of the locking portion 101 and at least a portion of the tap portion 102 gradually decreasing in diameter in a direction away from the locking portion 101; the first thread 103 is arranged around the locking part 101 and the self-tapping part 102; the second screw thread 104 is provided around the locking portion 101, and the second screw thread 104 is provided in parallel with the first screw thread 103 at intervals in the axial direction of the locking portion 101.

The screw structure 10 of the present application, the self-tapping portion 102 is a portion of the bolt structure that is in contact with the workpiece first when screwed into the workpiece, and by configuring the self-tapping portion 102 such that the diameter is gradually reduced in a direction away from the locking portion 101 at least in part, the stress area of the self-tapping portion 102 can be reduced, thereby increasing the pressure on the workpiece, and the bolt structure is easily screwed into the workpiece through the self-tapping portion 102. The locking portion 101 is a portion of the bolt structure that is screwed into the workpiece and then engages with the workpiece. The threads on the self-tapping part 102 are the first threads 103, and the threads on the locking part 101 are formed by combining the first threads 103 and the second threads 104, so that the number of the threads on the locking part 101 is larger than that on the self-tapping part 102, the number of the threads of the locking part 101 engaged with a workpiece is increased, the engagement reliability is improved, the risks of sliding and loosening of the screw structure 10 are reduced, the number of rotation turns of the screw structure 10 during installation is reduced by two threads, and the installation efficiency is improved; for example, one rotation of the screw structure 10 may allow the first thread 103 and the second thread 104 on the locking portion 101 to mate with two threads on the workpiece, respectively, and the number of threads of the locking portion 101 engaged with the workpiece is increased by two. In addition, the threads on the workpiece matched with the first threads 103 are tapped by the self-tapping part 102, the threads on the workpiece matched with the second threads 104 are tapped by the locking part 101, so that the threads on the workpiece are tapped by the self-tapping part 102 and the locking part 101 together, and the two threads on the workpiece are tapped by the self-tapping part 102 and the locking part 101 in sequence along with the increase of the depth of screwing the bolt structure into the workpiece, so that the process of screwing the bolt structure into the workpiece is more labor-saving. The second threads 104 are parallel to the first threads 103 and are spaced apart in the axial direction of the locking portion 101 so that the first threads 103 and the second threads 104 have the same direction of rotation, so that the first threads 103 and the second threads 104 together act as threads on the locking portion 101, and the screw structure 10 can be turned in one direction (clockwise or counterclockwise) to tap into a workpiece.

Therefore, the screw structure 10 of the present application can increase the number of screw turns on the locking portion 101 by providing the first screw 103 and the second screw 104, improve the reliability of the screw connection, and simultaneously can reduce the number of rotations of the screw structure 10 during installation, and improve the installation efficiency.

According to some embodiments of the present utility model, as shown in fig. 2, the tapping part 102 includes a tapping part 1021 and a guide part 1022, the diameter of the tapping part 1021 is equal to that of the locking part 101, and the tapping part 1021 is disposed at one end of the locking part 101; the guide 1022 is provided at the free end of the tap 1021, and the guide 1022 gradually decreases in diameter in a direction away from the lock 101; the first thread 103 is disposed around the locking portion 101, the tapping portion 1021, and the guide portion 1022. The screw structure 10 can be screwed into the workpiece through the guide part 1022, and by configuring the guide part 1022 to gradually reduce the diameter in the direction away from the locking part 101, the stress area of the guide part 1022 can be reduced, so that the pressure of the guide part 1022 to the workpiece is increased, the guide part 1022 is easy to screw into the workpiece, and the tapping part 1021 and the locking part 101 can be screwed into the workpiece in turn under the guidance of the guide part 1022, so that the installation of the screw structure 10 is facilitated. The tapping portion 1021 is located between the guide portion 1022 and the locking portion 101, and the diameter of the tapping portion 1021 is equal to that of the locking portion 101, so that a mating hole in a workpiece is tapped by the tapping portion 1021. The threads on the tapping part 1021 and the guide part 1022 are the first threads 103, and the initial position of the first threads 103 is on the guide part 1022, so that the force required by the tapping of the threads of the first threads 103 into a workpiece can be reduced, and the tapping part 1021 can conveniently tap the threads on the workpiece.

According to some embodiments of the utility model, as shown in fig. 1 and 2, the pitch of the first thread 103 is equal to the pitch of the second thread 104, and the distance between the first thread 103 and the second thread 104 in the axial direction is equal to 1/2 of the pitch of the first thread 103. Since the second screw thread 104 is parallel to the first screw thread 103 and is spaced apart from the first screw thread 103 in the axial direction of the locking portion 101, the pitch of the first screw thread 103 is equal to the pitch of the second screw thread 104. The distance between the first thread 103 and the second thread 104 in the axial direction is equal to 1/2 of the pitch of the first thread 103, so that the threads on the locking part 101 are uniformly distributed, the limiting force between the locking part 101 and the workpiece is uniformly distributed, and the limiting reliability is improved. In particular, the thread shape of the first thread 103 may be the same as or different from the thread shape of the second thread 104; the thread size of the first thread 103 may be the same as or different from the thread size of the second thread 104.

According to some embodiments of the present utility model, as shown in fig. 2, the number of turns of the first thread 103 on the tap 1021 is s and satisfies: s is more than or equal to 2. Since the pitch of the first thread 103 is fixed, the greater the number of turns of the first thread 103 on the tap portion 1021, the greater the length of the relative pitch of the tap portion 1021. When the tapping part 1021 starts to tap the first thread on the workpiece, the locking part 101 starts to tap the second thread on the workpiece after the bolt structure rotates at least two circles, so that the processing control is simple and convenient, the resistance can be dispersed, and the processing difficulty is reduced. In addition, the first thread 103 on the tapping portion 1021 can be engaged with the workpiece when the locking portion 101 is relatively disengaged from the workpiece, reducing the risk of complete disengagement of the screw structure 10 and improving reliability.

According to some embodiments of the present utility model, as shown in fig. 3 and 4, the screw structure 10 further includes a nut 105, where the nut 105 is disposed at the other end of the locking portion 101, and a protruding limiting portion 1052 is formed on a mating surface 1051 where the nut 105 is connected to the locking portion 101, and the limiting portion 1052 extends around the periphery of the locking portion 101. The nut 105 can tighten the screw structure 10 by the engagement surface 1051 and the workpiece abutment limit when the locking portion 101 is in threaded engagement with the workpiece. The stopper portion 1052 extends around the outer periphery of the locking portion 101, so that the stopper portion 1052 is arcuate in appearance. The limiting part 1052 can rotate around the periphery of the locking part 101 under the drive of the nut 1052, and the rotation track is a circumference, so that the limiting part 1052 can tap a matching groove on the surface of a workpiece, and the relative movement of the screw structure 10 and the workpiece can be limited by the matching of the limiting part 1052 and the matching groove. By providing the protruding stop portion 1052 on the mating surface 1051, the stop portion 1052 can be tapped into the workpiece under the rotational action of the nut 105, reducing the risk of loosening of the screw structure 10. In addition, the limiting portion 1052 can scrape paint off the surface of the workpiece.

The nut 105 may have various forms. For example, the nut 105 may be a pan head nut or a round head nut.

According to some embodiments of the present utility model, as shown in fig. 3 and 4, the stopper 1052 is configured as a plurality of stopper 1052 arranged at intervals, and the plurality of stopper 1052 is rotationally symmetrical about the center of the locking portion 101. The plurality of limiting portions 1052 can be respectively tapped into the workpiece under the rotation action of the nut 105, so that the effect of the limiting portions 1052 and the workpiece in a matched limiting manner is further enhanced, and the loosening risk of the screw structure 10 is further reduced. The center of the locking part 101 is a point of the axis of the locking part 101 on the matching surface 1051, and the plurality of limiting parts 1052 are rotationally symmetrically arranged about the center of the locking part 101, so that the plurality of limiting parts 1052 rotate around the same rotation center, the movement tracks of the plurality of limiting parts 1052 are the same circumference, the processing difficulty can be reduced, and the processing amount of a workpiece can be reduced.

In the description of the present utility model, "a plurality of" means two or more.

According to some embodiments of the utility model, as shown in FIG. 3, stop 1052 has a gradually decreasing cross-sectional area in a direction away from mating surface 1051. By configuring the limiting portion 1052 to gradually decrease in cross-sectional area in a direction away from the mating surface 1051, the size of the end portion of the limiting portion 1052 can be reduced, the stressed area of the limiting portion 1052 can be reduced, so that the pressure of the limiting portion 1052 on a workpiece can be increased, the end portion of the limiting portion 1052 is easy to attack into the workpiece under the rotation action of the nut, and meanwhile the rest portion of the limiting portion 1052 can gradually attack into the workpiece under the guidance of the end portion, so that the processing difficulty is reduced. For example, the cross-sectional shape of the stopper 1052 is triangular.

In summary, the screw structure 10 of the embodiment of the present application includes the locking portion 101, the tapping portion 1021, the guide portion 1022, the first thread 103, the second thread 104, and the nut 105; the threads on the locking part 101 are formed by combining the first threads 103 and the second threads 104, so that the number of turns of the threads of the locking part 101 meshed with a workpiece can be increased, the meshing reliability is improved, and the risks of sliding teeth and loosening of the screw structure 10 are reduced; the diameter of the guide part 1022 gradually decreases in the direction away from the locking part 101, so that the guide part 1022 can be easily screwed into a workpiece, and the tapping part 1021 and the locking part 101 can be sequentially screwed into the workpiece under the guidance of the guide part 1022, thereby facilitating the installation of the screw structure 10; the initial position of the first thread 103 is at the guide part 1022, so that the force required by the thread of the first thread 103 to attack the workpiece can be reduced, and the tapping part 1021 can conveniently attack the thread on the workpiece; the mating surface 1051 of the nut 105 is formed with a protruding stop portion 1052, and the stop portion 1052 can be tapped into a workpiece under the rotation of the nut 105, reducing the risk of loosening the screw structure 10.

An air conditioner according to an embodiment of the present utility model is described below with reference to fig. 5 and 6.

As shown in fig. 5, the air conditioner according to the present utility model includes a first housing 11, a second housing 12, and a screw structure 10, the second housing 12 being disposed on the first housing 11; the screw structure 10 is constructed as the screw structure 10 of any one of the above embodiments, and the screw structure 10 passes through the first housing 11 and the second housing 12 to fixedly connect the first housing 11 with the second housing 12.

The first housing 11 and the second housing 12 are the above-mentioned workpieces, the screw structure 10 may be sequentially tapped into the first housing 11 and the second housing 12 under the rotation effect, so that a fitting hole suitable for accommodating the screw structure 10 is formed on the first housing 11 and the second housing 12, and the locking portion 101 is accommodated in the fitting hole and may fixedly connect the first housing 11 and the second housing 12. Two threads sequentially tapped by the self-tapping part 102 and the locking part 101 are formed on the inner wall of the matching hole, and the two threads are respectively matched with the first thread 103 and the second thread 104 on the locking part 101 to limit the movement of the screw structure 10, so that the first shell 11 and the second shell 12 are reliably fixedly connected. The number of turns of the threads formed by the two threads is large, so that the meshing reliability can be improved, the risks of sliding teeth and loosening are reduced, the number of turns of the threads is small, and the installation efficiency is improved.

The air conditioner according to the present utility model includes the screw structure 10 in any one of the above embodiments. Since the air conditioner according to the present utility model includes the screw structure 10 of any one of the above embodiments, according to the air conditioner of the present utility model, the installation efficiency of the screw structure 10 is high, the assembly cycle of the air conditioner can be shortened, and the number of screw turns of the screw structure 10 engaged with the first housing 11 and the second housing 12, respectively, is large, the fixed connection of the first housing 11 and the second housing 12 can be made reliable, and the quality level of the air conditioner is high.

According to some embodiments of the present utility model, as shown in fig. 5, the screw structure 10 is provided with a nut 105, the nut 105 is disposed at the other end of the locking portion 101, a protruding limiting portion 1052 is formed on a mating surface 1051 where the nut 105 is connected to the locking portion 101, the limiting portion 1052 extends around the periphery of the locking portion 101, the nut 105 is abutted against the first housing 11, a distance h between the protruding mating surface 1051 of the limiting portion 1052 is h, and the thickness δ of the first housing 11 is as follows: h is less than or equal to 1/2 delta. The nut 105 may be held against the first housing 11 by the mating surface 1051 to tighten the screw structure 10. The spacing portion 1052 may tap a mating slot on the first housing 11, and the spacing portion 1052 cooperates with the mating slot to reduce the risk of loosening the screw structure 10. The distance of the protruding mating surface 1051 of the stop 1052 is the maximum depth of the mating slot. The maximum depth of the fitting groove is less than or equal to half the thickness of the first housing 11, and the influence of the formation of the fitting groove on the structural strength of the first housing 11 can be reduced.

According to some embodiments of the present utility model, as shown in fig. 5 and 6, a first fitting hole 111 is formed on the first housing 11, a second fitting hole 121 communicating with the first fitting hole 111 is formed on the second housing 12, and the locking part 101 is accommodated in the first fitting hole 111 and the second fitting hole 121 to fixedly connect the first housing 11 with the second housing 12; wherein the length of the locking portion 101 is s1, the sum of the lengths of the first fitting hole 111 and the second fitting hole 121 is s2 and satisfies: s1 is greater than or equal to s2.

The first fitting hole 111 and the second fitting hole 121 are the above-described fitting holes, the first fitting hole 111 is formed by the first housing 11, and the second fitting hole 121 is formed by the second housing 12. Two threads sequentially tapped by the guide portion 1022 and the locking portion 101 are formed on the inner walls of the first fitting hole 111 and the second fitting hole 121, and the two threads can be respectively matched with the first thread 103 and the second thread 104 on the locking portion 101 to limit the movement of the screw structure 10, at this time, the locking portion 101 is accommodated in the first fitting hole 111 and the second fitting hole 121, and the locking portion 101 fixedly connects the first housing 11 with the second housing 12. The length of the locking portion 101 is greater than or equal to the sum of the lengths of the first fitting hole 111 and the second fitting hole 121, so that the locking portion 101 can be completely accommodated in the first fitting hole 111 and the second fitting hole 121, the reliability of threaded connection is improved, and the reliability of fixed connection of the first shell 11 and the second shell 12 is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A screw structure, comprising:

a locking part (101);

a self-tapping portion (102), the self-tapping portion (102) being provided at one end of the locking portion (101) and at least a portion of the self-tapping portion (102) gradually decreasing in diameter in a direction away from the locking portion (101);

a first thread (103), wherein the first thread (103) is arranged around the locking part (101) and the self-tapping part (102);

the second threads (104) are arranged around the locking part (101), and the second threads (104) are parallel to the first threads (103) and are arranged at intervals in the axial direction of the locking part (101).

2. The screw structure according to claim 1, characterized in that the self-tapping portion (102) comprises:

a tapping portion (1021), the diameter of the tapping portion (1021) being equal to the diameter of the locking portion (101), the tapping portion (1021) being provided at one end of the locking portion (101);

a guide portion (1022), the guide portion (1022) being provided at a free end of the tapping portion (1021), the guide portion (1022) gradually decreasing in diameter in a direction away from the locking portion (101);

wherein the first thread (103) is circumferentially arranged on the locking part (101), the tapping part (1021) and the guiding part (1022).

3. Screw structure according to claim 1, characterized in that the pitch of the first thread (103) is equal to the pitch of the second thread (104), the distance of the first thread (103) from the second thread (104) in the axial direction being equal to 1/2 of the pitch of the first thread (103).

4. Screw structure according to claim 2, characterized in that the number of turns of the first thread (103) on the tap (1021) is s and satisfies: s is more than or equal to 2.

5. The screw structure of claim 1, further comprising:

the nut (105), nut (105) set up in the other end of locking portion (101), nut (105) with be formed with protruding spacing portion (1052) on mating surface (1051) that locking portion (101) are connected, spacing portion (1052) encircle locking portion (101) periphery extends.

6. The screw structure according to claim 5, wherein the stopper portion (1052) is configured in a plurality of spaced-apart arrangement, and a plurality of the stopper portions (1052) are rotationally symmetrical about the center of the locking portion (101).

7. The screw structure according to claim 5, characterized in that the limiting portion (1052) has a gradually decreasing cross-sectional area in a direction away from the mating surface (1051).

8. An air conditioner, comprising:

a first housing (11);

a second housing (12), the second housing (12) being provided on the first housing (11);

screw structure (10), the screw structure (10) being configured as a screw structure (10) according to any one of claims 1-7, the screw structure (10) passing through the first housing (11) and the second housing (12) to fixedly connect the first housing (11) with the second housing (12).

9. The air conditioner according to claim 8, wherein the screw structure (10) is provided with a nut (105), the nut (105) is disposed at the other end of the locking portion (101), a protruding limiting portion (1052) is formed on a mating surface (1051) where the nut (105) is connected with the locking portion (101), the limiting portion (1052) extends around the periphery of the locking portion (101), the nut (105) is abutted against the first housing (11), a distance between the protruding limiting portion (1052) and the mating surface (1051) is h, and the thickness of the first housing (11) is δ and is as follows: h is less than or equal to 1/2 delta.

10. The air conditioner according to claim 9, wherein a first fitting hole (111) is formed in the first housing (11), a second fitting hole (121) communicating with the first fitting hole (111) is formed in the second housing (12), and the locking portion (101) is accommodated in the first fitting hole (111) and the second fitting hole (121) to fixedly connect the first housing (11) with the second housing (12); wherein the method comprises the steps of

The length of the locking part (101) is s1, the sum of the lengths of the first matching hole (111) and the second matching hole (121) is s2, and the sum of the lengths is as follows: s1 is greater than or equal to s2.