CN214789649U

CN214789649U - Anti-disassembly coupling subassembly

Info

Publication number: CN214789649U
Application number: CN202121066930.9U
Authority: CN
Inventors: 陈城彬; 张先雄; 孙浩迪; 柴瑜琴; 吴杰
Original assignee: Ningbo Kanghanrui Electric Appliance Co ltd
Current assignee: Ningbo Kanghanrui Electric Appliance Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-11-19
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses an anti-disassembly pipe coupling subassembly, including coupling nut, lock nut and coupling, lock nut installs on coupling nut, and coupling nut and coupling are connected, and first connecting pipe and second connecting pipe are connected respectively to coupling nut, coupling, are equipped with one-way structure of splining between coupling nut and the lock nut, and one-way structure of splining includes extensible member, pivot, ratchet ring gear and pawl, and extensible member and pivot are installed in the storage tank, and the pawl rotates and installs in the pivot, and the pawl is connected with the extensible member. When the locking nut is operated to rotate, the pawl extends out of the accommodating groove under the action of the telescopic piece and is matched and clamped with the groove part of the ratchet ring gear, and the connecting nut is driven to rotate to be connected with the pipe joint; when the locking nut rotates reversely, the convex parts of the two ratchet ring gears press the pawls simultaneously to enable the pawls to retract into the accommodating groove and to be arranged in a sliding mode with the ratchet ring gears, no limiting effect exists between the locking nut and the connecting nut, the connecting nut cannot be driven to rotate by operating the locking nut, and the purpose of preventing disassembly is achieved.

Description

Anti-disassembly coupling subassembly

Technical Field

The utility model relates to an anti-disassembly structure technical field, concretely relates to anti-disassembly pipe joint subassembly.

Background

Since R290 and R32 refrigerants are flammable, an air conditioner using the refrigerant is more required to have a severe leakage of the refrigerant, particularly, inside the air conditioner. In order to prevent accidents caused by refrigerant leakage into the indoor side due to the fact that a professional outsider does not recover the refrigerant to remove the air conditioner, the conventional feasible refrigerant connection method is that the refrigerant is prevented from being leaked into the indoor side, for example, the air conditioner with the patent number of 201320373864.9 and an anti-removal pipe connection device are disclosed, the anti-removal pipe connection device comprises a pipe joint, a pipe connection nut and an elastic gasket, the pipe joint comprises a pipe body, an outer hexagonal section and an outer threaded section, the end surface of the pipe connection nut, which is close to the pipe joint, is provided with a first non-return tooth, the outer hexagonal section comprises a groove formed in the end surface of the pipe connection nut, which is close to the pipe connection nut, and a second non-return tooth arranged in the groove, the elastic gasket is sleeved on the pipe body, the elastic gasket comprises a base part and a tilting part which is tilted outwards in a spiral manner from the base part, the base part is accommodated in the groove, the nut and the pipe connection nut are locked in a rotating manner along the locking-in hour-hour direction, the free end of the base part is elastically clamped on the second non-return tooth, the free end of the tilting part is elastically clamped on the first non-return tooth, and the direction of the needle when the needle is disassembled is opposite to the spiral direction of the elastic washer. The opposite free ends of the elastic washer prevent the nipple nut and the pipe joint from rotating in the disassembly direction, making disassembly impossible. It uses the combination to connect, can't dismantle after the installation, only destroys it and just can dismantle.

Therefore, it is necessary to provide a novel assembling mode of the combustible refrigerant anti-disassembly nut.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing analysis, the present invention provides an anti-disassembly pipe joint assembly to solve the deficiencies of the prior art.

The utility model discloses mainly realize through following technical scheme:

the utility model provides a pair of anti-disassembly pipe joint subassembly, including coupling nut, lock nut and coupling, lock nut installs on coupling nut, coupling nut and coupling are connected, coupling nut connects first connecting pipe, the second connecting pipe is connected to the coupling, be equipped with one-way structure of splining between coupling nut and the lock nut.

The unidirectional rotation stopping structure comprises an expansion piece, a rotating shaft, a ratchet ring gear and a pawl, wherein a containing groove is formed in the outer wall of the connecting nut, the ratchet ring gear is arranged on the inner wall of the locking nut, the outer wall of the connecting nut is in contact with the protruding portion of the ratchet ring gear, the expansion piece and the rotating shaft are installed in the containing groove, the pawl is rotatably installed on the rotating shaft, the pawl is connected with the expansion piece, the pawl can be telescopically rotated to extend out of the containing groove to be clamped with the groove portion of the ratchet ring gear in a matched mode, or the pawl is abutted against the protruding portion of the ratchet ring gear to be retracted into the containing groove and is arranged with the ratchet ring gear in a sliding mode.

Furthermore, the ratchet ring gear comprises a plurality of limiting teeth which are connected or arranged at intervals, a groove part is formed between every two adjacent limiting teeth, the limiting teeth have a first radian, the outer surface of the pawl has a second radian, and the first radian is matched with the second radian.

Furthermore, a pawl limiting table is arranged in the accommodating groove, the rotating shaft is located in the middle of the pawl, and one end of the pawl abuts against the limiting table under the action of the telescopic piece.

Furthermore, the connecting nut is sleeved with a second spring located in the locking nut, the connecting nut is provided with a stopping piece, and the second spring is installed between the stopping piece and the one-way rotation stopping structure.

Furthermore, a limiting part is arranged on the connecting nut, the limiting part is matched with the locking nut for limiting, and the second spring and the limiting part are located on two sides of the one-way rotation stopping structure.

Furthermore, an internal thread is arranged in the connecting nut, and an external thread is arranged on the outer wall of the pipe joint.

Furthermore, a first sealing surface is arranged in the connecting nut, the first connecting pipe penetrates through the connecting nut, a sealing part is arranged at the end of the first connecting pipe, an opening is formed in the sealing part, a second sealing surface is arranged on the outer wall of the pipe joint, and the first sealing surface and the second sealing surface are respectively matched and sealed with the outer wall and the inner wall of the sealing part.

Furthermore, the locking nut is a hexagon nut, and the connecting nut is a circular ring nut.

Furthermore, the accommodating groove and the pawl are respectively provided with a limiting column, and two ends of the telescopic piece are respectively arranged on the two limiting columns.

Compared with the prior art the utility model discloses technical scheme's beneficial effect does:

when the locking nut is operated to rotate along the locking direction, the pawl extends out of the accommodating groove under the action of the telescopic piece and is matched and clamped with the groove part of the ratchet ring gear, and the connecting nut is driven to rotate to be connected with the pipe joint; when the locking nut is operated to rotate reversely, the convex parts of the two ratchet ring gears simultaneously press the pawls to enable the pawls to retract into the accommodating groove and to be arranged in a sliding mode with the ratchet ring gears, no limiting effect exists between the locking nut and the connecting nut at the moment, the locking nut is operated to be incapable of driving the connecting nut to rotate, the function of unidirectional rotation stopping is achieved, and the purpose of preventing disassembly is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of an anti-disassembly pipe joint assembly according to an embodiment of the present invention respectively connecting a first connecting pipe and a second connecting pipe;

fig. 2 is a cross-sectional view of the coupling nut and the lock nut in a tightened state according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of the coupling nut and the lock nut in the anti-detachment state according to the embodiment of the present invention;

fig. 4 is a cross-sectional view of a coupling nut provided in accordance with an embodiment of the present invention;

fig. 5 is an enlarged view of a portion a of fig. 2.

The reference numbers are as follows:

1. the connecting nut comprises a connecting nut body, a connecting nut body 1a, an internal thread, a connecting nut body 1b, a first sealing surface, a locking nut body 2, a locking nut body 3, a pipe joint 3a, an external thread, a connecting nut body 3b, a second sealing surface 4, a first connecting pipe 5, a second connecting pipe 6, a one-way rotation stopping structure 7, a containing groove 8, a telescopic piece 9, a rotating shaft 10, a ratchet ring 10, a groove portion 10a, a groove portion 10b, a protruding portion 11, a pawl 11a, a second radian 12, a pawl limiting table 13, a limiting column 14, a stopping piece 15, a limiting piece 16, limiting teeth 16a and a first radian.

Detailed Description

In order to better understand the invention for those skilled in the art and to define the claimed scope more clearly, the invention will be described in detail below with respect to certain specific embodiments of the invention. It should be noted that the following description is only a few examples of the present invention, and the specific and direct descriptions of the related structures are only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of the present invention. Conventional alternatives and substitutions made by those skilled in the art in light of the teachings of the present disclosure should be considered as within the scope of the present disclosure.

The invention will be further explained with reference to the drawings and the specific embodiments.

Example 1

As shown in fig. 1, the utility model provides an anti-disassembly pipe joint subassembly, including coupling nut 1, lock nut 2 and coupling 3, lock nut 2 installs on coupling nut 1, and coupling nut 1 is connected with coupling 3, and first connecting pipe 4 is connected to coupling nut 1, and second connecting pipe 5 is connected to coupling 3, is equipped with one-way structure 6 that splines between coupling nut 1 and the lock nut 2.

One-way rotation stopping structure 6 includes extensible member 8, pivot 9, ratchet ring 10 and pawl 11, be equipped with storage tank 7 on coupling nut 1's the outer wall, ratchet ring 10 is located on lock nut 2's the inner wall, coupling nut 1's outer wall contacts with ratchet ring 10's bellying 10b, extensible member 8 and pivot 9 are installed in storage tank 7, pawl 11 rotates and installs on pivot 9, pawl 11 is connected with extensible member 8, pawl 11 telescopically rotates and stretches out the storage tank 7 outer and blocks with ratchet ring 10's concave part 10a cooperation, or contradict with ratchet ring 10's bellying 10b and retract in storage tank 7 with ratchet ring 10 slip setting. Wherein the telescopic member 8 is a spring.

Specifically, the ratchet ring gear 10 includes a plurality of limit teeth 16 connected or arranged at intervals, a groove portion 10a is formed between two adjacent limit teeth 16, the limit teeth 16 have a first radian 16a, the outer surface of the pawl 11 has a second radian 11a, and the first radian 16a is matched with the second radian 11 a.

Specifically, the accommodating groove 7 is internally provided with a pawl limiting table 12, the rotating shaft 9 is positioned in the middle of the pawl 11, and one end of the pawl 11 abuts against the limiting table 12 under the action of the telescopic piece 8. The stability of the structure is improved.

Preferably, the middle of the pawl 11 is provided with a shaft mounting hole.

Further, the width of the pawl 11 is smaller than the width of the accommodating groove 7. The vertical distance between the top of the accommodating groove 7 and the surface of the pawl limit table 12 is larger than the thickness of the pawl 11.

Further, the length of the pawl 11 is greater than the length of one of the limit teeth 16 and less than the length between the projections 10b of the two limit teeth 16. The length of the pawl 11 is greater than the length between the groove portions 10a of the two limit teeth 16.

Specifically, the accommodating groove 7 and the pawl 11 are respectively provided with a limiting column 13, and two ends of the telescopic member 8 are respectively installed on the two limiting columns 13.

Preferably, the limit post 13 is disposed at an end away from the detent limit stop 12.

As shown in fig. 4, preferably, the coupling nut 1 is sleeved with a second spring (not shown in the figure) located in the lock nut 2, the coupling nut 1 is provided with a retaining member 14, and the second spring is installed between the retaining member 14 and the one-way rotation stopping structure 6. The locking nut 2 is limited, and the locking nut 2 is prevented from moving.

In particular, the backstop 14 is arranged close to the end of the first connecting tube 4.

Preferably, the backstop 14 is a backstop pin.

As shown in fig. 4, specifically, the connecting nut 1 is provided with a limiting member 15, the limiting member 15 is matched with the locking nut 2 for limiting, and the second spring and the limiting member 15 are located at two sides of the unidirectional rotation stopping structure 6. And carrying out second limit on the locking nut 2.

Preferably, the stop 15 is arranged at the end close to the pipe joint 3.

Further, the limiting member 15 is an annular limiting table.

Specifically, an internal thread 1a is arranged in the connecting nut 1, and an external thread 3a is arranged on the outer wall of the pipe joint 3.

Specifically, be equipped with first sealed face 1b in the coupling nut 1, first connecting pipe 4 passes coupling nut 1 and the tip is equipped with the sealing, be equipped with the opening on the sealing, the outer wall of coupling 3 is equipped with the sealed face 3b of second, and first sealed face 1b, the sealed face 3b of second cooperate with the outer wall and the inner wall of sealing respectively and seal. The sealing performance of the joint is improved, and the refrigerant leakage is prevented.

Furthermore, the sealing part is a horn mouth with a wide outer end and a narrow inner end, and the first sealing surface 1b and the second sealing surface 3b are conical surfaces.

Preferably, the coupling nut 1 is provided with a mounting hole for connecting the first connecting pipe 4, and the first sealing conical surface 1b is located between the mounting hole and the internal thread 1 a. The second sealing taper surface 3b is located at the end of the pipe joint 3.

Preferably, the locking nut 2 is a hexagonal nut, and the height of the hexagonal nut is smaller than the distance between the retaining member 14 and the limiting member 15. The coupling nut 1 is a ring nut.

When the connecting nut 1 and the locking nut 2 are installed, the pawl 11 is installed on the accommodating groove 7 through the rotating shaft 9, and the spring is installed on the right side of the pawl 11. The pawl 11 is now spring biased to rotate counterclockwise about the pivot 9. The bottom of the left side of the pawl 11 props against the pawl limiting table 12, the radian of the limiting teeth 16 on the connecting nut 1 corresponds to the radian of the pawl 11, and the pawl 11 is pushed in.

As shown in fig. 2-3 and 5, when the air conditioner is connected and installed, when the lock nut 2 is rotated counterclockwise by using an adjustable wrench, the inner limit teeth 16 clamp the right end face of the pawl 11, and the bottom of the left end of the pawl 11 abuts against the pawl limit table 12. The locking nut 2 can then drive the coupling nut 1 to rotate together, screwing the coupling nut 1 into the pipe connection 3 of the evaporator. When screwed in place, the third sealing taper 3b of the evaporator tube end 3 presses against the inner wall of the bell mouth of the first connecting tube 4. At this time, the first sealing tapered surface 1b of the coupling nut 1 and the second sealing tapered surface 3b of the evaporator tube end 3 tightly press the flare of the first connection tube 4 to seal it. If the spanner is used for disassembly, the connecting nut 1 is in a circular ring shape, so that the adjustable spanner cannot be used for clamping. When the adjustable spanner rotates the locking nut 2 clockwise, the radian of the locking nut 2 extrudes the right side of the pawl 11, and the pawl 11 rotates clockwise to enter the accommodating groove 7. At this time, the locking nut 2 and the connecting nut have no limiting effect. Thereby ensuring that the first connecting pipe 4 and the pipe joint 3 of the evaporator cannot be normally removed by a tool.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An anti-disassembly pipe joint subassembly which characterized in that: the anti-rotation device comprises a connecting nut (1), a locking nut (2) and a pipe joint (3), wherein the locking nut (2) is installed on the connecting nut (1), the connecting nut (1) is connected with the pipe joint (3), the connecting nut (1) is connected with a first connecting pipe (4), the pipe joint (3) is connected with a second connecting pipe (5), and a one-way rotation stopping structure (6) is arranged between the connecting nut (1) and the locking nut (2);

the one-way rotation stopping structure (6) comprises a telescopic piece (8), a rotating shaft (9), a ratchet ring gear (10) and a pawl (11), the outer wall of the connecting nut (1) is provided with a containing groove (7), the ratchet ring gear (10) is arranged on the inner wall of the locking nut (2), the outer wall of the connecting nut (1) is contacted with the convex part (10b) of the ratchet ring gear (10), the telescopic piece (8) and the rotating shaft (9) are arranged in the containing groove (7), the pawl (11) is rotatably arranged on the rotating shaft (9), the pawl (11) is connected with the telescopic piece (8), the pawl (11) can telescopically rotate and extend out of the containing groove (7) to be matched and clamped with the groove part (10a) of the ratchet ring gear (10), or the ratchet ring gear (10) is contacted with the convex part (10b) of the ratchet ring gear (10) and retracted into the containing groove (7) to be arranged with the ratchet ring gear (10) in a sliding way.

2. The anti-disassembly pipe joint assembly of claim 1, wherein: the novel ratchet wheel is characterized in that a pawl limiting table (12) is arranged in the accommodating groove (7), the rotating shaft (9) is located in the middle of the pawl (11), and one end of the pawl (11) is abutted against the limiting table (12) under the action of the telescopic piece (8).

3. The anti-disassembly pipe joint assembly of claim 1, wherein: the ratchet ring gear (10) comprises a plurality of limiting teeth (16) which are connected or arranged at intervals, a groove portion (10a) is formed between every two adjacent limiting teeth (16), each limiting tooth (16) is provided with a first radian (16a), the outer surface of the pawl (11) is provided with a second radian (11a), and the first radian (16a) is matched with the second radian (11 a).

4. The anti-disassembly pipe joint assembly of claim 1, wherein: the connecting nut (1) is sleeved with a second spring located in the locking nut (2), the connecting nut (1) is provided with a stopping piece (14), and the second spring is installed between the stopping piece (14) and the unidirectional rotation stopping structure (6).

5. The anti-disassembly pipe joint assembly of claim 4, wherein: the connecting nut (1) is provided with a limiting part (15), the limiting part (15) is matched with the locking nut (2) for limiting, and the second spring and the limiting part (15) are located on two sides of the one-way rotation stopping structure (6).

6. The anti-disassembly pipe joint assembly of claim 1, wherein: an internal thread (1a) is arranged in the connecting nut (1), and an external thread (3a) is arranged on the outer wall of the pipe joint (3).

7. The disassembly-prevention coupling assembly of claim 1 or 6, wherein: the connecting structure is characterized in that a first sealing surface (1b) is arranged in the connecting nut (1), the first connecting pipe (4) penetrates through the connecting nut (1) and the end part of the first connecting pipe is provided with a sealing part, an opening is formed in the sealing part, a second sealing surface (3b) is arranged on the outer wall of the pipe joint (3), and the first sealing surface (1b) and the second sealing surface (3b) are respectively matched and sealed with the outer wall and the inner wall of the sealing part.

8. The disassembly-prevention coupling assembly of claim 1 or 6, wherein: the locking nut (2) is a hexagon nut, and the connecting nut (1) is a circular nut.

9. The disassembly-prevention coupling assembly of claim 1 or 2, wherein: the accommodating groove (7) and the pawl (11) are respectively provided with a limiting column (13), and two ends of the telescopic piece (8) are respectively arranged on the two limiting columns (13).