CN209960038U

CN209960038U - Anti-disassembly type double-thread nut assembly, nut pipe joint assembly and air conditioner

Info

Publication number: CN209960038U
Application number: CN201822251308.XU
Authority: CN
Inventors: 李雪刚; 汪志勇
Original assignee: Shanghai Mitsubishi Electric Machinery Shanghai Mitsubishi Air Conditioner Electrical Co Ltd
Current assignee: Shanghai Mitsubishi Electric Machinery Shanghai Mitsubishi Air Conditioner Electrical Co Ltd; Shanghai Mitsubishi Electric and Shangling Air Conditioner and Electric Appliance Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-01-17
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses an anti-disassembly formula double thread nut subassembly and nut pipe coupling subassembly and air conditioner thereof contains: the mandrel is provided with a first external thread and a first internal thread, and the first internal thread is connected with the second external thread of the joint in a matching way; the first internal thread and the second external thread are fine threads; the nut is provided with a second internal thread and is matched and connected with the first external thread; the second internal thread and the first external thread are coarse threads; when the nut assembly is unscrewed, torque is applied to the joint and the nut, when the unscrewing force reaches a certain value, the first external thread and the second internal thread are unscrewed firstly, and the connection between the first internal thread and the second external thread is still fastened; and the torque is continuously applied to unscrew, the mandrel and the nut are separated, and at the moment, the torque of the nut cannot be applied to the mandrel any more, so that the joint cannot be unscrewed from the mandrel. The utility model discloses can realize nut anti-disassembly, avoid connecting and nut component to connect the back and being dismantled, simple structure, processing is convenient, and is sealed reliable, easy installation, and is with low costs.

Description

Anti-disassembly type double-thread nut assembly, nut pipe joint assembly and air conditioner

Technical Field

The utility model relates to a pipeline connection technical field, in particular to anti-disassembly formula double thread nut subassembly and nut pipe coupling subassembly and air conditioner thereof.

Background

At present, the indoor side of the split air conditioner of the common working medium (such as R22 and R410A) uses the way of pipe joint and pipe connection nut to connect the evaporator and the connecting pipe.

As stated, the use of detachable joints is not allowed for the indoor side of the air conditioner using flammable refrigerants such as R290 and R32. However, the existing pipe connecting nut is generally an integrated pipe connecting nut, which has the possibility of being detachable, but cannot meet the installation requirement of the inner side of an air conditioner using flammable refrigerants, i.e., the connection between the pipe connector and the pipe connecting nut is loosened, which can cause refrigerant leakage and cannot meet the requirements of assembly standard and safety. Certainly, some anti-disassembly connecting pipe nuts exist at present, but the structure is complex, so that the processing and the use of the connecting pipe nuts are inconvenient, and the cost is higher.

For the foregoing reasons, it is desirable to provide a structurally simple anti-disassembly nipple nut assembly that meets assembly standards and safety requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-disassembly formula double thread nut assembly and nut pipe coupling subassembly and air conditioner thereof utilizes the cooperation of these two kinds of screw threads of thick thread and thin thread, realizes the nut anti-disassembly function, effectively avoids the refrigerant that leads to after dismantling after current coupling and the connection of takeover nut to reveal the problem, simple structure, and processing is convenient, and is sealed reliable, easy installation, and is with low costs.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: an anti-disassembly formula double thread nut component, with articulate, contains:

the mandrel is provided with a first external thread and a first internal thread; the first internal thread is in fit connection with the second external thread of the joint; the first internal thread and the second external thread are both fine threads;

a nut provided with a second internal thread; the second internal thread is connected with the first external thread in a matching way; the second internal thread and the first external thread are both coarse threads;

when the double-thread nut assembly is unscrewed, torque is applied to the joint and the nut respectively, when the unscrewing force reaches a certain value, the first external thread of the mandrel and the second internal thread of the nut are unscrewed firstly, and the connection between the first internal thread of the mandrel and the second external thread of the joint is still in a fastening state; when torque is continuously applied and the nut is unscrewed to a certain position, the mandrel and the nut can be completely separated, at the moment, the torque of the nut can not be applied to the mandrel any more, and the joint can not be unscrewed from the mandrel, so that the anti-disassembly effect is achieved.

Preferably, the joint is connected and fastened with the copper pipe through the double-thread adapter nut assembly.

Preferably, the anti-disassembly double-thread nut assembly further comprises a cover in threaded connection with the nut.

Preferably, the nut is further provided with an outer hexagonal structure which can facilitate the tool to screw and apply torque.

Preferably, the joint is provided with another outer hexagonal structure which can facilitate the tool to apply torque by screwing.

Preferably, when the double-thread nut assembly is tightened, the first external thread and the first internal thread of the mandrel are tightened in sequence, or the first internal thread and the first external thread of the mandrel are tightened in sequence.

The utility model also provides an anti-disassembly formula double thread nut coupling subassembly contains the joint and as above double thread nut subassembly.

Preferably, the joint is connected and fastened with the copper pipe through the double-thread nut assembly.

The utility model provides an air conditioner more, through as above between the indoor set connecting pipe of air conditioner and the off-premises station connecting pipe double thread nut coupling subassembly connect.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses utilize the cooperation of these two kinds of screw threads of coarse thread screw thread and fine thread screw thread, realize nut anti-disassembly function, the problem is revealed to the refrigerant that leads to after effectively avoiding current coupling and takeover nut to connect to be dismantled, its simple structure, processing is convenient, and is sealed reliable, easy installation, and is with low costs.

Drawings

Fig. 1 is a schematic view of the anti-disassembly double-thread nut assembly of the present invention in a tightened state;

fig. 2 is a schematic view of the anti-disassembly double-thread nut assembly in loosening.

Wherein, 1, copper tube; 2. a nut; 3. a mandrel; 4. a joint; 5. and a cover.

Detailed Description

In order to make the present invention more obvious and understandable, the present invention is further described below with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and fig. 2, the utility model provides an anti-disassembly formula double thread nut component is connected with joint 4, and joint 4 passes through nut component and copper pipe 1 and realizes being connected and fastening, makes the refrigerant of air conditioner pass through in can following the pipeline.

In this embodiment, the nut assembly comprises a nut 2, a mandrel 3 and a cover 5. The spindle 3 is provided with an external thread 301 and an internal thread 302. Wherein, the external thread 301 of the mandrel 3 is matched and connected with the internal thread 201 of the nut 2, and both the two threads are coarse threads. The internal thread 302 of the mandrel 3 is in mating connection with the external thread 401 of the joint 4, both of which are fine threads.

The nut 2 is provided with a thread 202 on the side thereof remote from the copper tube 1 for mating engagement with the thread of the cap 5. The nut 2 is also provided with an external hexagonal structure to facilitate the application of torque by a tool (e.g., a wrench) for screwing. Another external hexagonal structure is also provided on the adapter 4 to facilitate the application of torque by a tool (e.g., a wrench) for screwing.

Fig. 1 is a schematic view of an anti-disassembly double-thread nut assembly in a tightened state. When the nut assembly is tightened, the outer hexagonal structure of the joint 4 and the outer hexagonal structure of the nut 2 are respectively tightened by applying torque to the outer hexagonal structure by a tool, and after the tightening, both the external thread 301 (coarse thread) and the internal thread 302 (fine thread) of the mandrel 3 are in a fastened state, that is, the internal thread 201 of the nut 2 and the external thread 301 of the mandrel 3 are tightened, and the external thread 401 of the joint 4 and the internal thread 302 of the mandrel 3 are tightened.

Wherein, because the copper pipe 1 and the joint 4 are connected through the nut component, the tightening sequence of the external thread 301 and the internal thread 302 of the mandrel 3 is not required when tightening.

Fig. 2 is a schematic view of the anti-disassembly double-thread nut assembly in a loosening state. When unscrewing the nut assembly, unscrewing is performed by applying a torque by a tool on the outer hexagonal structure of the fitting 4 and the outer hexagonal of the nut 2, respectively. The thread angle of the fine thread is smaller than that of the coarse thread, so that the self-locking capacity of the fine thread is strong, when the unscrewing force reaches a certain value during unscrewing, the coarse thread is firstly unscrewed, at the moment, the external thread 301 (coarse thread) of the mandrel 3 and the internal thread 201 (coarse thread) of the nut 2 are firstly unscrewed, and at the moment, the connection between the internal thread 302 (fine thread) of the mandrel 3 and the external thread 401 (fine thread) of the joint 4 is still fastened; when continuing to unscrew and unscrew to a certain position, dabber 3 and nut 2 can break away from completely, and the moment of torsion of nut 2 can't apply on dabber 3 again this moment, just also can not make to connect 4 and unscrew from dabber 3 to play anti-disassembly's effect.

The utility model discloses an anti-disassembly formula double thread is taken over nut assembly and is applied to a nut pipe coupling subassembly, and take over nut assembly and be connected through screw thread and joint 4, this kind of coupling subassembly can be used for connecting air conditioner indoor unit connecting pipe and off-premises station connecting pipe to when guaranteeing to take over closely to cooperate between nut assembly and the coupling 4, play anti-disassembly's effect, prevent that the refrigerant from revealing. It should be noted that before assembly, the spindle 3 and the nut 2 of the nut assembly need to be coupled and then mated with the fitting 4.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. The utility model provides an anti-disassembly formula double thread nut component is connected with joint (4), its characterized in that contains:

a mandrel (3) provided with a first external thread (301) and a first internal thread (302); the first internal thread (302) is in fit connection with a second external thread (401) of the joint (4); the first internal thread (302) and the second external thread (401) are both fine threads;

a nut (2) provided with a second internal thread (201); the second internal thread (201) is in fit connection with the first external thread (301); the second internal thread (201) and the first external thread (301) are both coarse threads;

when the double-thread nut assembly is unscrewed, torque is applied to the joint (4) and the nut (2) respectively, when the unscrewing force reaches a certain value, the first external thread (301) of the mandrel (3) and the second internal thread (201) of the nut (2) are unscrewed firstly, and the connection between the first internal thread (302) of the mandrel (3) and the second external thread (401) of the joint (4) is still in a fastening state; when torque is continuously applied and the nut is unscrewed to a certain position, the mandrel (3) and the nut (2) can be completely separated, at the moment, the torque of the nut (2) can not be applied to the mandrel (3), and the joint (4) can not be unscrewed from the mandrel (3) so as to achieve the anti-disassembly effect.

2. The removal-resistant double-threaded nut assembly of claim 1,

the joint (4) is connected and fastened with the copper pipe (7) through the double-thread connecting pipe nut assembly.

3. The removal-resistant double-threaded nut assembly of claim 1,

the nut further comprises a cover (5) which is connected with the nut (2) through threads.

4. The disassembly-resistant double-threaded nut assembly of claim 1 or 3,

the nut (2) is further provided with an outer hexagonal structure which can facilitate the tool to screw and apply torque.

5. The disassembly-resistant double-threaded nut assembly of claim 1 or 2,

the joint (4) is provided with another outer hexagonal structure which is convenient for a tool to screw and apply torque.

6. The removal-resistant double-threaded nut assembly of claim 1,

when the double-thread nut assembly is screwed, the first external thread (301) and the first internal thread (302) of the mandrel (3) are screwed in sequence, or the first internal thread (302) and the first external thread (301) of the mandrel (3) are screwed in sequence.

7. An anti-disassembly double-threaded nut coupling assembly, comprising a fitting (4) and a double-threaded nut assembly according to any one of claims 1 to 6.

8. The anti-disassembly double threaded nut fitting assembly of claim 7,

the joint (4) is connected and fastened with the copper pipe (7) through the double-thread nut component.

9. An air conditioner characterized in that an indoor unit connecting pipe and an outdoor unit connecting pipe of the air conditioner are connected by the double-threaded nut pipe joint assembly as claimed in claim 7.