KR101189919B1 - Collet assembly for tube coupler - Google Patents

Abstract

The present invention relates to a collet assembly for a tube connector, which is inserted into a collet hole formed in a tube connector, in the construction of a collet assembly for holding a tube coupled for fluid transfer,

The collet assembly may include: a collet body having a tube hole for inserting a tube; a flange formed outside the collet body to prevent entry into the connector more than necessary while providing ease of separating the connector and the tube; And an arm formed elastically by a plurality of slots in an inner direction of the body, and a lock closure protruding to clamp down the outer diameter surface of the tube to the inner diameter of the arm, wherein the tube coupled to the collet assembly is subjected to point contact. When the pressure is generated by the initial transfer through the fluid transfer, the lock closure is formed to be eccentric so that the entire lock closure can be held through the surface contact as if the entire tube is wrapped in a circular shape.

Tube end connection, collet assembly, lock closure, eccentric

Description

COLLET ASSEMBLY FOR TUBE COUPLER}

The present invention relates to a collet assembly for a tube connector, and more particularly to providing an improved collet assembly applied to a connector for facilitating the connection of a tube (hose or tube) for transporting a fluid (especially water). It is about.

Tube connector for connecting the tube for fluid transfer has been developed and used in various forms in the past, typically, using the collet to quickly combine the tube, and after the coupling can be kept continuously locked, tube and connector There are also provided to facilitate the separation of.

A representative example of a tube connector including such a collet will be described with reference to FIG. 6.

Tube connector 1 is formed with a passage (2) for the fluid transfer inside, stepped to prevent entry of the tube (3) connected to the end of the passage (2), and the stepped (4) The connector body (7) via the O-ring (6) is provided in the hermetic space (5) whose diameter is enlarged in the outward direction.

A collet hole 9 for coupling the collet 10 for holding the tube 3 for connecting with the inclined surface 8 whose diameter is reduced in the outward direction from the end of the airtight space 5 is formed.

The collet 10 coupled to the collet hole 9 forms a tube hole 11 for inserting the tube 3 so that the flange 12 for providing easy stopping and entering into the connector 1 on the outside thereof. It is provided with a cylindrical collet body 13 having a.

An arm 15 having elasticity is formed by a plurality of slots 14 in the inner direction of the collet body 13, and the outer diameter surface of the tube 3 coupled to the inner diameter of the arm 15 is held. The lock closure 16 for protruding is formed.

In the prior art as described above, the lock closure formed on the inner diameter of the arm constituting the collet is a straight line on the inner surface of the round type formed by the same type as the circle formed by the collet body (a of FIG. 6) and the circular inner diameter formed by the collet body. The straight type (b of FIG. 6) formed in the form is typically used.

In the case of the round-type lock closure, the entire surface of the tube to be joined is pressurized, so there is less damage on the surface of the tube. However, if the pulled tube is pulled slowly without pulling the combined tube quickly, the tube is easily pulled out.

In order to make up for the above disadvantages, a straight type lock closure has been developed and used. In this case, the tube has an advantage of easy initial clamping because the tube contacts the lock closure in point contact, but the lock closure penetrates deep into the tube. As a result, the tube in contact with the lock closure is severely damaged and there is a problem that can cause a leakage of the fluid during long-term use.

In addition, when the fluid is transferred while the tube is coupled, the internal pressure increases, and in this process, the tube is temporarily pushed outward, and the outer diameter of the arm constituting the collet is connected to the inclined surface of the connector. As the diameter of the arm is reduced, it holds the tube more firmly to prevent it from falling off.

In this process, as the gap between slots for forming the arm disappears, the diameter is reduced to be in contact with each other, and in this process, the lock closure formed inside the arm presses the tube.

Since the lock closure is formed in a straight line type, as a result, the diameter of the tube is reduced to a square shape, which causes a fatal disadvantage in that the fluid cannot be smoothly transferred.

This reduction in the cross-sectional area of the tube generally does not significantly affect the simple transfer of fluids, such as water, but can ensure normal operability in precise industrial applications in which fluids must be supplied (transferred) at fixed or constant pressure. Many problems occur, such as not being able to.

Therefore, in the present invention, in order to solve the problems described above, the collet assembly is inserted into the collet hole formed in the tube connector to hold the tube coupled for fluid transfer, the collet assembly is to insert the tube A collet body formed with a tube hole for the flange, a flange formed on an outer side of the collet body to prevent entry into the connector more than necessary while providing ease of separating the connector and the tube, and a plurality of slots in the inner direction of the collet body An arm formed with elasticity by the rod and a lock closure protruding to control the outer diameter surface of the tube to the inner diameter of the arm, and initially holding the tube coupled to the collet assembly through point contact, and transferring the fluid. When the pressure is generated, the entire surface of the lock closure is circular and the surface contact is made. It is characterized in that the lock closure is formed eccentrically to hold it through, so that the basic purpose of providing the ease of tube interruption can be faithfully achieved.

The present invention is configured to have a eccentric in any direction while configuring the lock closure holding the tube coupled to the collet in the round type having the same circular cross section as the collet body, while ensuring the function of initially holding the tube faithfully When the internal pressure increases, the tube is held in a circular shape to minimize the change in the cross-sectional area of the tube, thereby minimizing the influence of the flow of the fluid to be conveyed, thereby improving the quality of the connector or collet assembly and applying it to various fields, as well as having an external competitive edge. It is an invention having various effects.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a broken state showing a tube connector to which the collet assembly to which the technique of the present invention is applied, FIG. 2 is a perspective view showing a collet assembly for tube connection to which the technique of the present invention is applied, and FIG. 4 is a cross-sectional view taken along the line A-A of the tube connection collet assembly, Figure 4 is a side view of the tube connection collet assembly to which the technique of the present invention is applied, Figure 5 is a tube connection collet to which the technique of the present invention is applied The use state of the assembly will be described together as a structural diagram.

The collet assembly 110, which is inserted into the collet hole 101 formed in the tube connector 100 and serves to hold the tube 102 coupled for fluid transfer, has a tube hole for inserting the tube 102. The collet body 112 of the tubular shape formed through the 111 is provided.

On the outside of the collet body 112 is formed a flange 113 to provide ease of separation of the connector 100 and the tube 102 while performing a stopper function to prevent entry into the connector 100 more than necessary. do.

The inner side of the collet body 112 forms an arm 115 having elasticity by a plurality of slots 114, and to hold the outer diameter surface of the tube 102 coupled to the inner diameter of the arm 115. The lock closure 116 for protruding is formed.

In the present invention, the lock closure 116 is improved to initially hold the tube 102 coupled to the collet assembly 110 through point contact, and when the pressure is generated due to fluid transfer, the entire lock closure 116 is circular. By wrapping the tube 102 in such a way to prevent separation as well as minimize the cross-sectional change of the tube 102 is characterized in that to minimize the impact on the fluid transport.

To this end, the lock closure 116 is formed to be eccentrically formed to protrude to the inner diameter of the arm 115.

The eccentric state of the lock closure 116 is a collet at the end position EP of the distance (L) from the start position (SP) to the center (P) of the collet assembly 110, regardless of clockwise or counterclockwise It is configured to have a shorter distance than the distance (L1) to the center (P) of the assembly (110).

That is, the diameter (D) of the start position (SP) of the lock closer 116 has a diameter smaller than the diameter (D1) of the end position (EP), the end position (EP) direction from the start position (SP) So that it is shaped like a spiral.

As a means for maintaining the lock closure 116 in an eccentric state, only the lock closure 116 itself inserted into the arm 115 may be configured to have an eccentricity, and as another example, with respect to the flange 113. By allowing the arm 115 to have an eccentricity, the lock closure 116 may naturally be configured to have an eccentricity.

Looking at the state of use of the tube connector collet assembly 110 to which the technique of the present invention is applied as described above are as follows.

When the arm 115 constituting the collet assembly 110 is pushed into the collet hole 101 formed in the tube connector 100, a gap between the slots 114 formed between the arm 115 and the arm 115 is formed. As it narrows, the diameter of the entirety of the arm 115 is reduced to allow easy coupling.

In the collet assembly 110 inserted as described above, the locking jaw 120 formed on the outer diameter surface of the arm 115 is engaged with the inclined surface 121 formed on the inner diameter of the tube connector 100 so that it is not easily separated. do.

When the tube 102 to be connected in this state is pushed through the tube hole 111 of the collet assembly 110, the collet assembly 110 is formed inside the inclined surface 121 by the insertion force of the tube 102. The diameter of the arm 115 is enlarged while moving to the airtight space 122, and at the same time, the tube 102 is inserted into the outer diameter surface of the O-ring 123 interposed in the airtight space 122 to maintain airtightness.

Of course, the front end of the tube 102 to the stepped portion 124 further formed in the front side of the airtight space 122 is stopped by further stopping the entrance of the tube 102 is completed, at this time The outer diameter surface is clamped by the lock closure 116 formed in the inner diameter of the arm 115.

That is, since the lock closure 116 is provided in an eccentric state, the tube 102 is kept in point contact by the starting position SP having a small diameter D, and the fluid is transferred into the tube 102. When the pressure is increased or when the tube 102 is pulled outward, the collet assembly 110 temporarily moves in the outward direction of the tube connector 100.

When this phenomenon occurs, the locking jaw 120 formed on the outer diameter surface of the arm 115 is connected to the inclined surface 121 formed outside the airtight space 122 of the tube connector 100 while the diameter of the arm 115 is increased. Since it is reduced and collected, the entire lock closure 116 is in contact with the outer surface of the tube 102 to maintain a complete clamping state.

This is because the inclined surface 121 becomes smaller in diameter toward the collet hole 101 direction, and eventually the diameter of the arm 115 becomes smaller, and thus the end position EP from the start position SP of the lock closure 116. This is because the whole catches the outer surface of the tube 102.

When the lock closure 116 in the eccentric state as described above is deformed close to the normal circle shape (see FIG. 5) when the entire tube 102 is held, the internal cross-sectional deformation of the tube 102 is minimized, which hinders the transport of the fluid. It will not cause.

Of course, when the tube 102 is to be separated from the collet assembly 110, the collet assembly 110 is pushed into the airtight space 122 as in the related art, and thus the diameter of the arm 115 is increased by the slot 114. After escalating, the tube 102 may be forcibly disengaged.

The present invention is connected to the point 102 by the start position of the lock closure with a small diameter in the initial connection of the tube 102, the eccentric by reducing the diameter of the arm when the pressure is increased by the fluid transfer or the tube is slowly pulled It is advantageous to provide the ease of tube connection by allowing the entire lock closure to be interrupted through surface contact.

1 is a perspective view of a broken state showing the tube connector to which the collet assembly to which the technique of the present invention is applied.

Figure 2 is a perspective view showing a collet assembly for tube connection to which the technique of the present invention is applied.

3 is a cross-sectional view taken along line A-A of the tube assembly collet assembly to which the technique of the present invention is applied.

Figure 4 is a side view of the tube assembly collet assembly to which the technique of the present invention is applied, seen in the B direction.

5 is a structural diagram showing a state of use of the tube assembly collet assembly to which the technique of the present invention is applied.

Figure 6 (a, b) is a configuration diagram used state of the tube assembly collet assembly to which the prior art is applied.

* Description of the symbols used in the main parts of the drawings *

100; Tube connector

110; Collet assembly

112; Collet body

114; Slot

115; cancer

116; Lock closure

Claims (4)

A collet body 112 forming a tube hole 111 for inserting the tube 102; A flange 113 formed on the outer side of the collet body 112 to provide easy connection between the connector 100 and the tube while preventing entry into the connector 100 more than necessary; An arm (115) formed elastically by a plurality of slots (114) in the inner direction of the collet body (112); In the collet assembly (110) comprising a lock closure (116) protruding to interrupt the outer diameter surface of the tube (102) to the inner diameter of the arm (115); The tube 102 coupled to the collet assembly 110 is initially held through a point contact, and when the pressure is generated by fluid transfer, the entire lock closure 116 surrounds the tube 102 in a circular shape, and then through the surface contact. Locklock 116 is formed eccentric to hold; The eccentric state of the lock closure 116, the distance (L) from the start position (SP) to the center (P) of the collet assembly 110 is the center (P) of the collet assembly 110 at the end position (EP) Form with a distance shorter than the distance (L1), Or, the collet assembly for a tube connector characterized in that the diameter (D) of the start position (SP) of the lock closure 116 has a diameter smaller than the diameter (D1) of the end position (EP). delete delete The method of claim 1; Corrugated assembly for a tube connector, characterized in that the arm 115 is formed eccentrically with respect to the flange 113 so that the lock closure 116 naturally has an eccentricity.

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