CN216025628U

CN216025628U - Quick connector for connecting spray gun and fluid supply cup

Info

Publication number: CN216025628U
Application number: CN202121843934.3U
Authority: CN
Inventors: 肖云
Original assignee: Qingdao Hanbai Plastic Technology Co ltd
Current assignee: Qingdao Hanbai Plastic Technology Co ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-03-15
Anticipated expiration: 2031-08-09

Abstract

The utility model relates to a quick connector for connecting a spray gun and a fluid supply cup, which is used for connecting the spray gun and the fluid supply cup and comprises a sealing connecting piece and a fixing nut, wherein a fluid communication channel is formed between the fluid supply cup and the spray gun; the fixing nut includes a second connecting portion for locking the sealing connection member and a locking portion for locking the spray gun. The quick connector can reduce the problem that the use cost is increased because a user needs to replace different spray guns when replacing different fluid supply cups.

Description

Quick connector for connecting spray gun and fluid supply cup

Technical Field

The utility model relates to the field of fluid spraying operation equipment, in particular to a quick connector for connecting a spray gun and a fluid supply cup.

Background

When the spray gun is used, paint in the spray cup is sprayed out through the spray nozzle, the head of the existing spray gun is of a plastic structure, and the head of the spray gun can generate plastic deformation such as friction scratch and outward expansion along with the increase of the use times, so that the sealing requirement cannot be met. Meanwhile, when the spray gun is used, an operator needs to swing in all angular directions, when the operator encounters a sharp or too hard object in a fault, the spray gun head protruding from the joint of the spray cup is easily broken, so that economic loss is caused, and the situation is easy to occur in a narrow space. In addition, the head of the existing plastic spray gun can only be matched with cup covers in certain shapes, the requirements of cup covers in different shapes cannot be met, and the use cost can be increased by replacing the cup covers in different shapes. Therefore, the quick connector which can prolong the service life of the spray gun and is flexibly suitable for fluid supply cups with cup covers of different shapes has important significance.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a quick connector for connecting a spray gun and a fluid supply cup, which is intended to solve the problems of the prior art.

The quick connector for connecting the spray gun and the fluid supply cup comprises a sealing connecting piece and a fixing nut, wherein a fluid communication channel is formed between the fluid supply cup and the spray gun;

the fixing nut includes a second connecting portion for locking the sealing connection member and a locking portion for locking the spray gun.

On the basis of the scheme, the locking part comprises a locking boss and a convex lip.

On the basis of the scheme, the fixing nut is integrally annular, the locking boss and the protruding lip are formed by extending the end part of the fixing nut far away from one side of the sealing connecting piece towards the axis direction of the fixing nut, and the extending length of the locking boss is smaller than that of the protruding lip.

On the basis of the scheme, the number of the locking parts is 2 or 4, the 2 or 4 locking parts are discontinuous, and a penetrating groove is formed between the two locking parts.

On the basis of the scheme, the edge of the initial extending side of the locking boss is sunken, a vertical stop arm is formed on the side wall of the locking boss, and a second bearing surface is formed on the convex lip; the first bearing surface 2-8 and the second bearing surface are located in the same plane.

On the basis of the scheme, the sealing connecting piece comprises a channel for communicating fluid, a locking sealing part for connecting and locking a liquid outlet of the fluid supply cup, an insertion tube body for inserting the nozzle part of the spray gun and a first connecting part matched with the fixing nut.

On the basis of the scheme, a first groove part is arranged on the outer wall of the sealing connecting piece; and a second groove part is arranged on the outer wall of the fixing nut.

On the basis of the above scheme, the locking sealing part comprises a sealing groove for inserting the liquid outlet of the fluid supply cup and a locking part for locking the fluid supply cup.

On the basis of the above scheme, the locking part is arranged at the inlet end of the sealing groove; comprising an annular wall and a pair of transverse locking projections formed on the inner wall of the annular wall.

The utility model has the advantages that: one end of the metal locking quick connector is connected with the plastic nozzle part of the spray gun, and the other end of the metal locking quick connector is connected with the fluid supply cup made of plastic, so that the service life of the spray gun can be greatly prolonged; the metal locking quick connector wraps the bulge part of the spray gun tube in the plastic spray gun nozzle assembly, so that the plastic nozzle part of the spray gun can be protected as far as possible under the condition of misoperation; the metal locking quick connector can be flexibly selected according to the shape of the head of the cup cover of the spray cup, the same spray gun can be used, the connection between the fluid supply cups of different types and the spray gun is realized by replacing sealing connecting pieces of different shapes, and therefore the problem that the use cost is increased due to the fact that different spray guns need to be replaced when different fluid supply cups are replaced by a user is solved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view showing a connection structure of a quick connector with a spray gun and a fluid supply cup according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a quick connector according to the present invention;

FIG. 3 is a schematic view of the seal connection of the present patent;

FIG. 4 is a schematic structural view of a nozzle portion of a spray gun of the prior art (patent CN1902003A, US2005/0145718A 1);

FIG. 5 is a schematic view showing the structure of a connecting portion and an inlet end in a nozzle portion in the prior art (patent CN1902003A, US2005/0145718A 1);

FIG. 6 is a schematic view showing the structure of a connecting portion in a nozzle portion in the prior art (patent CN1902003A, US2005/0145718A 1);

FIG. 7 is a schematic view of the structure of a connecting portion in a nozzle portion in the prior art (patent CN1902003A, US2005/0145718A1) (the connecting portion is a single layer);

FIG. 8 is a schematic structural view of a fixing nut in embodiment 2 of this patent;

FIG. 9 is a schematic structural view of a connecting part of the quick connector and the spray gun in embodiment 2 of the patent before locking;

FIG. 10 is a schematic structural view of a connecting part of a quick connector and a spray gun in a locking state according to embodiment 2 of the present patent;

fig. 11 is a schematic structural view (sectional view) of a connection part of a quick connector and a spray gun in a locked state according to embodiment 2 of the present patent.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

1-3, a quick connector for connecting a spray gun 10 to a fluid supply cup 90 includes a seal connection 1 and a retaining nut 2 that form a fluid communication path between the fluid supply cup and the spray gun;

the sealing connecting piece 1 comprises a channel 1-4 for communicating fluid, a locking sealing part 1-3 for connecting and locking a liquid outlet of a fluid supply cup, an insertion tube body 1-1 for inserting an inlet end of a spray gun nozzle part and a first connecting part 1-2 matched with a fixing nut 2.

As shown in FIG. 2, the sealing connector 1 is used as an adapter component, and mainly functions to form a stable and sealed fluid communication channel between the fluid supply cup 90 and the spray gun 10, the locking seal portion 1-3 of the sealing connector 1 is used for connecting the liquid outlet 91 of the fluid supply cup 90, and the liquid outlet 91 of the fluid supply cup 90 is inserted into the locking seal portion 1-3 to form a sealed connection state.

The fluid supply cups 90 may take various forms, such as those shown in patents US20030006310a1, CN208711972U, TWD155488D01S, CN300700565D, CN306509120S, and CN210252849U, and each of the fluid supply cups 90 has a spout 91 (or outlet) for the outflow of liquid and a locking structure 92 for locking connection with a spray gun or adapter.

The liquid outlet 91 of the fluid supply cup is generally designed on the lid of the fluid supply cup 90 (e.g. part number 40 in the drawing of patent US20030006310A, part number 14 in the drawing of patent CN208711972U, part number 2 in the drawing of patent CN 210252849U); also, outlet 91 of fluid supply cup 90 is configured on fluid supply cup 90, such as the fluid supply cup of patent CN1221757C (referred to as material supply 5 in this patent).

Specifically, the liquid outlet 91 of the fluid supply cup 90 is inserted into the sealing groove 1-5 of the locking seal portion 1-3; after the liquid outlet of the fluid supply cup is inserted into the sealing grooves 1-5, in order to stabilize the sealing connection member 1 and the fluid supply cup 90, and prevent the two from being disengaged randomly during use, the locking sealing portion 1-3 needs to lock the two rapidly, specifically, the locking sealing portion 1-3 is provided with a locking portion 1-6 for locking the fluid supply cup 90 rapidly, the structure of the locking portion 1-6 is set according to a locking structure 92 at the liquid outlet 91 of the fluid supply cup 90, and the structure of the locking structure 92 of the fluid supply cup 90 is also various, such as the part indicated by reference numeral 69 in the drawing of patent CN 100415384C: hook element, part 14 in the drawings of patent CN 1221757C: a spiral wedge element.

The configuration of the locking portions 1-6 may be varied and is specifically configured to correspond to the locking configuration 92 at the exit port 91 of the fluid supply cup 90. For example, for connecting the fluid supply cup of patent CN100415384C, the locking portions 1-6 are to be realized to fit with the component hook element of reference numeral 69 in the drawings thereof, and the locking portions 1-6 can be locked in the structure of the second end portion 58 of the second adapter 54 in fig. 2 of the specification thereof; also for example in connection with the fluid supply cup of patent CN1221757C, the locking portions 1-6 are to be realized to fit with the spiral wedge element 14, and the locking portions 1-6 may be constructed in such a way that their description refers to the construction of the corresponding counter element 15 on the inner side of the protrusion 16 in fig. 1.

The manner in which the sealing connector 1 is connected to the fluid supply cup 90 is described in detail above, and the manner in which the sealing connector 1 is connected to the spray gun 10 to allow fluid communication is described in detail below.

The insertion pipe body 1-1 of the sealing connecting piece 1 is used for being inserted into the inlet end 17 of the spray gun 10, and after the insertion, the outer wall of the insertion pipe body 1-1 and the inner wall of the inlet end 17 form sealing connection.

When the insertion tube body 1-1 of the sealing connector 1 is inserted into the inlet end 17 of the spray gun 10, fluid communication is only possible between the two, and at this time, in order to stabilize the sealing connector 1 and the spray gun so that the two are not separated from each other at will during use, it is necessary to lock the sealing connector 1 and the connection portion 80 of the spray gun 10 or the body assembly 12 or the nozzle portion 14 of the body assembly of the spray gun 10. When locking, an additional adapter element is required: a fixing nut 2; the fixing nut 2 enables one end to be locked with the sealing connection 1 and the other end to be locked with the body assembly 12 of the spray gun 10 or the connection part 80 of the nozzle part 14 of the body assembly. The fixing nut 2 thus comprises a second coupling part 2-1 for locking said sealing joint 1 and a locking part 2-2 for locking the spray gun. As a specific connection method, the fixing nut 2 and the sealing connection member 1 are locked by: the first connecting part 1-2 and the second connecting part 2-1 are in threaded connection.

The spray gun in fig. 1 of the present patent is the spray gun 10 shown in fig. 1 of patent CN1902003A, and fig. 4 is the spray gun 9 of patent CN1902003A (the reference numerals in the original figures only retain the reference numerals of the components related to the present patent, and the rest are deleted). Fig. 4-7 highlight the location and specific structure of the connecting portion 80. In the case where the coupling portion 80 of fig. 4 to 6 has a double-layered structure, the coupling portion 80 may have a single-layered structure as shown in fig. 7, while maintaining the structures of the concave groove 80-1, the locking protrusion 80-2 and the stopper protrusion 80-3 of the coupling portion 80.

The spray gun to which this embodiment is directed is a spray gun 10 as shown in patents CN1902003A, US2005/0145718a1, the nozzle portion 14 in the body assembly 12 of which has a liquid passage 16 extending from an inlet end 17 to an outlet end 18, there being a connecting portion 80 at the inlet end 17 for connecting a fluid supply cup in removable engagement; the coupling portion 80 is constructed as shown in fig. 3 and 4, and includes a concave groove 80-1, a locking protrusion 80-2, and a stopper protrusion 80-3. The nozzle part 14 is made of polymer (such as polypropylene, polyethylene or nylon filled with glass fiber), and the size of the nozzle part can generate friction scratch and increase of diameter due to the soft characteristic of the polymer material along with the increase of the using times, so that the sealing requirement is influenced; the device also needs to swing in all angular directions when being used by an operator, and the device is made of polymer materials, so that the operator has errors when in use, and the part combined with the fluid supply cup can be broken off when the device is touched by a sharp and hard object, thereby causing loss, and the device is more easy to have the errors especially in a narrow space; in addition, the connection portion 80 is difficult to fit into other fluid supply cups due to its special structure, thereby resulting in limited user use.

The sealing connecting piece 1 and the fixing nut 2 are made of metal, specifically stainless steel or aluminum. Both are separately processed and integrally formed.

The outer wall of the sealing connecting piece 1 is provided with first groove parts 1-7, and the outer wall of the fixing nut 2 is provided with second groove parts 2-5, so that the sealing connecting piece is convenient for a user to install and disassemble.

Example 2

In order to adapt the spray gun 10 shown in patents CN1902003A, US2005/0145718a1, as shown in fig. 2, 3, 8-11, the present invention provides a quick-coupling for a spray gun and a fluid supply cup, comprising a sealing connection 1 and a fixing nut 2 forming a fluid communication channel between the fluid supply cup and the spray gun; the fixing nut 2 includes a second coupling part 2-1 for locking the sealing coupling member 1 and a locking part 2-2 for locking the spray gun.

The sealing connecting piece 1 comprises a channel 1-4 for communicating fluid, a locking sealing part 1-3 for connecting and locking a liquid outlet of a fluid supply cup, an insertion tube body 1-1 for inserting a nozzle part of a spray gun and a first connecting part 1-2 matched with a fixing nut 2. The first connecting part 1-2 and the second connecting part 2-1 are in threaded connection.

The locking seal part 1-3 includes a seal groove 1-5 for insertion of a liquid outlet of the fluid supply cup and a locking part 1-6 for locking the fluid supply cup. The locking part 1-6 is arranged at the inlet end of the sealing groove 1-5; comprising an annular wall 1-63 and a pair of lateral locking projections 1-61 formed on the inner wall of the annular wall 1-63.

The specific structure of the locking seal portions 1 to 3 refers to example 3.

The fixing nut 2 is integrally annular and comprises a locking boss 2-3 and a convex lip 2-4; the locking lug boss 2-3 and the convex lip 2-4 are formed by extending the end part of the fixing nut 2 at one side far away from the sealing connecting piece 1 towards the axis direction of the fixing nut 2 (specifically extending towards the direction vertical to the axis A of the fixing nut 2), the extending length of the locking lug boss 2-3 is less than the extending length of the convex lip 2-4, namely after the locking lug boss 2-3 and the convex lip 2-4 extend for a certain length at the same time, the locking lug boss 2-3 stops extending, the convex lip 2-4 continues to extend and forms a first bearing surface 2-8,

the locking boss 2-3 is arranged on one side close to the second connecting part 2-1, and the convex lip 2-4 is arranged on one side far away from the second connecting part 2-1.

The number of the locking parts 2-2 is 2 or 4. In the case of 2, two locking portions 2-2 are provided at positions of bisectors of the circumference of the fixing nut 2, that is: 2 locking parts 2-2 are symmetrical with a plane passing through the axis A of the quick joint; when the number of the locking parts is 4, 4 locking parts 2-2 are arranged at the position of the quartering point of the circumference of the fixed nut 2.

The 2 or 4 locking parts 2-2 are discontinuous, and a penetrating groove 2-7 is formed between the two locking parts 2-2.

The edge of the initial extending side of the locking boss 2-3 is sunken, a vertical stop arm 2-6 is formed on the side wall of the locking boss 2-3, and a second bearing surface 2-9 is formed on the convex lip 2-4; the initial extending side refers to the end of the locking boss 2-3, which begins to extend, that is, the end of the locking boss 2-3 close to the annular fixing nut. The first bearing surface 2-8 and the second bearing surface 2-9 are located on the same plane.

When the spray gun 10 is locked, the convex lip 2-4 of the fixing nut 2 passes through the concave groove 80-1 of the connecting part 80, the locking protrusion 80-2 and the limiting protrusion 80-3 of the connecting part 80 pass through the discontinuous penetrating groove 2-7 between the two locking parts 2-2, then the fixing nut 2 and the connecting part 80 are relatively rotated, the locking protrusion 2-3 and the locking protrusion 80-2 are locked through rotation, one end surface of the limiting protrusion 80-3 is stopped by the stop surface 2-6, further, the fixing nut 2 is prevented from further rotating, at the moment, the lower surface of the locking protrusion 80-2 falls on the first bearing surface 2-8 of the convex lip 2-4, and the lower surface of the limiting protrusion 80-3 falls on the second bearing surface 2-9. Symmetrical 2 or 4 locking bosses 2-3 and lips 2-4 securely lock the gun at the attachment portion 80 as shown in fig. 10 and 11. The lip 2-4 is adapted to fit the thickness of the locking projection 80-2 in the case where the fixing nut 2 is locked with the attaching portion 80, preventing the fixing nut 2 from being detached from the attaching portion 80 in the axial direction a.

The other parts of the quick connector for connecting the spray gun 10 and the fluid supply cup 90 are referred to in embodiments 1 and 3, except that the fixing nut 2 of the present embodiment is used.

Example 3

A quick connector for spray guns and fluid supply cups for use with the fluid supply cup shown in patent CN210252849U, the cover of the fluid supply cup in patent CN210252849U having a plurality of locking projections such as the locking projection 3 shown in the accompanying drawings, and in addition to the locking projections of other configurations shown in the accompanying drawings of FIG. 1a, FIG. 1c, FIG. 3b, FIG. 5, FIG. 7, FIG. 8, FIG. 9, FIG. 10a, FIG. 10b, the locking portions 1-6 of the sealing connector 1 can directly use the locking structure 6 shown in FIG. 12 and FIG. 13 of CN210252849U when connecting the fluid supply cup in patent CN 210252849U.

The locking parts 1-6 of the sealing joint 1 can use the structure shown in fig. 3 and 11 of this patent in addition to the above two structures; specifically, the locking part 1-6 is arranged at the inlet end of the sealing groove 1-5; comprises an annular wall 1-63 and a pair of transverse locking projections 1-61 formed on the inner wall of the annular wall 1-63, and stop arms 1-62 are arranged at the locking end positions of the locking projections 1-61.

For other structures of the quick connector in this embodiment, refer to embodiment 1 or embodiment 2, and are not described herein again.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A quick-connect coupling for connecting a spray gun to a fluid supply cup, comprising a sealing connection (1) and a retaining nut (2) forming a fluid communication path between the fluid supply cup and the spray gun;

the fixing nut (2) comprises a second connecting part (2-1) for locking the sealing connecting piece (1) and a locking part (2-2) for locking the spray gun.

2. Quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 1, characterised in that the locking portion (2-2) comprises a locking boss (2-3) and a lip (2-4).

3. The quick connector for connecting a spray gun and a fluid supply cup according to claim 2, wherein the fixing nut (2) is annular in shape as a whole, the locking boss (2-3) and the protruding lip (2-4) are formed by extending the end of the fixing nut (2) on the side away from the sealing connector (1) towards the axial center of the fixing nut (2), and the length of the extension of the locking boss (2-3) is less than that of the protruding lip (2-4).

4. Quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 3, characterised in that the number of locking portions (2-2) is 2 or 4.

5. Quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 4, characterised in that the 2 or 4 locking parts (2-2) are discontinuous, with a through-going groove (2-7) being formed between the two locking parts (2-2).

6. The quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 3, characterized in that the locking projection (2-3) is recessed at the edge of the initial extension side, forming a vertical stop arm (2-6) on the side wall of the locking projection (2-3) and a second bearing surface (2-9) on the lip (2-4); the first bearing surface 2-8 and the second bearing surface (2-9) are positioned on the same plane.

7. Quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 6, characterised in that the sealing connection (1) comprises a passage (1-4) for the fluid to flow through, a locking seal (1-3) for connecting and locking the outlet opening of the fluid supply cup, an insertion tube (1-1) for insertion into the nozzle part of the spray gun and a first connection (1-2) for cooperation with a fixing nut (2).

8. Quick-connect coupling for connecting a spray gun and a fluid supply cup according to claim 1, characterised in that the outer wall of the sealing connection piece (1) is provided with a first groove portion (1-7); and a second groove part (2-5) is arranged on the outer wall of the fixed nut (2).

9. The quick connector for connecting a spray gun and a fluid supply cup according to claim 7, characterized in that the locking seal (1-3) comprises a sealing groove (1-5) for insertion of the outlet opening of the fluid supply cup and a locking portion (1-6) for locking the fluid supply cup.

10. Quick connector for connecting a spray gun and a fluid supply cup according to claim 9, characterized in that the locking portion (1-6) is provided at the inlet end of the sealing groove (1-5); comprises an annular wall (1-63) and a pair of transverse locking projections (1-61) formed on the inner wall of the annular wall (1-63).