CN112856076A

CN112856076A - Joint core and rubber pipe assembly comprising same

Info

Publication number: CN112856076A
Application number: CN202110228983.4A
Authority: CN
Inventors: 申亚强; 张继赫; 胡初钻; 王静; 骆登辉
Original assignee: Chuanrun Hydraulic Technology Jiangsu Co ltd
Current assignee: Chuanrun Hydraulic Technology Jiangsu Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-05-28

Abstract

The invention discloses a joint core and a rubber hose assembly comprising the same, relates to the technical field of general hydraulic pressure, and solves the problem of medium leakage caused by poor sealing property between an agnail-shaped joint core and a rubber hose. The joint core comprises a joint core body, a plurality of grooves extending along the circumferential direction of the joint core body are formed in the peripheral surface of the joint core body, the grooves are sunken towards the direction of a central shaft of the joint core body, and the cross section of each groove is in an isosceles trapezoid shape. So set up, when the rubber hose received the extrusion, can fully fill up in the recess, form "O" shape sealing washer in the position of recess, will connect between the outer wall of core body and the inner wall of rubber hose sealed, solved among the prior art "barb" type joint core and the rubber hose leakproofness not good, lead to the problem of medium leakage.

Description

Joint core and rubber pipe assembly comprising same

Technical Field

The invention relates to the technical field of general hydraulic pressure, in particular to a joint core and a rubber hose assembly comprising the same.

Background

In the field of general hydraulic technology, a hose assembly includes a rubber hose, a nipple core, and a crimping sleeve. Most of the connector cores adopted in the prior art are barb-shaped connector cores, and teeth on the outer peripheral surfaces of the connector cores are inclined towards one end of the connector cores. The joint core of the type plays a role in relieving the falling-off of the joint core to a certain extent, but has a poor sealing effect. The main principle is that a special buckling and pressing device extrudes the buckling and pressing sleeve to enable the rubber hose to have small deformation, and the inner wall of the rubber hose is filled with a space formed by the barb and the outer peripheral surface of the joint core to achieve the sealing effect. However, the space between the barb and the outer peripheral surface of the joint core cannot be completely filled when the inner wall of the rubber hose is extruded due to the shape design of the barb, the sealing effect between the joint core and the rubber hose is reduced, the use of the rubber hose assembly cannot be influenced in a short time, but rubber is aged along with the passage of time, the elasticity of the rubber hose is insufficient, the gap at the sealing position between the inner wall surface of the rubber hose and the joint core is accelerated to expand, the risk of medium leakage occurs, the service life of the rubber hose assembly is seriously shortened, the use cost and the after-sale cost of the rubber hose assembly are increased, and the environment is also greatly influenced by frequent replacement of the rubber hose assembly.

Therefore, how to solve the problem of medium leakage caused by poor sealing performance between the barb-shaped joint core and the rubber hose is an important technical problem to be solved by the technical personnel in the field.

Disclosure of Invention

The invention aims to provide a joint core and a rubber hose assembly comprising the same, and solves the problem of medium leakage caused by poor sealing property between a barb-shaped joint core and a rubber hose in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a joint core, which comprises a joint core body, wherein a plurality of grooves extending along the circumferential direction of the joint core body are arranged on the outer circumferential surface of the joint core body, the grooves are sunken towards the central axis direction of the joint core body, and the cross section of each groove is in an isosceles trapezoid shape.

Preferably, the groove bottom of the groove and the side wall of the groove as well as the side wall of the groove and the outer peripheral surface of the joint core body are connected through arc surfaces.

Preferably, the distance between any two adjacent grooves is equal.

Preferably, the number of the grooves is set to six.

Preferably, the depth of the groove is 2.5 mm to 3.5 mm.

Preferably, the outer peripheral surface of the joint core body is provided with a clamping groove used for being connected with the buckling sleeve in a positioning mode, and the clamping groove extends along the circumferential direction of the joint core body.

The invention also provides a rubber tube assembly which comprises the joint core, wherein the joint core is the joint core.

According to the technical scheme, the joint core comprises a joint core body, grooves are formed in the peripheral surface of the joint core body, the grooves are recessed towards the central axis direction of the joint core body, the cross section of each groove is in an isosceles trapezoid shape, and the number of the grooves is multiple. So set up, when withholding the sleeve through withholding equipment extrusion, the inner wall of rubber hose receives extrusion deformation and fills up in the recess, is equivalent to, rubber hose is extruded and forms "O" shape sealing washer in the position of recess, sets up a plurality of recesses and just forms a plurality of "O" shape sealing washers, with fully sealed between rubber hose and the joint core, it is not good to have solved among the prior art between "barb" type joint core and the rubber hose leakproofness, the problem that the medium leaked easily.

Drawings

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

FIG. 1 is a cross-sectional view of a joint core in an embodiment of the invention;

FIG. 2 is a cross-sectional view of a completed swage hose assembly in an embodiment of the invention.

In the figure:

1-joint core, 11-joint core body, 12-groove, 13-clamping groove, 2-rubber hose, 3-buckling sleeve, 31-convex ring and 32-snap ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The purpose of this embodiment is to provide a joint core, solve among the prior art "barb" type joint core and the rubber hose leakproofness not good, lead to the problem of medium leakage.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

Referring to fig. 1, in the present embodiment, the joint core 1 includes a joint core body 11, a groove 12 is formed on an outer circumferential surface of the joint core body 11, the groove 12 is recessed toward a central axis direction of the joint core body 11, a cross section of the groove 12 is shaped like an isosceles trapezoid, and a plurality of grooves 12 are formed.

The isosceles trapezoid is a bilateral symmetry structure, and an included angle larger than 90 degrees is formed between the upper bottom of the isosceles trapezoid and the side edge of the isosceles trapezoid. However, in the prior art, the barb of the barb-type joint core is inclined towards one end of the joint core, so that an obtuse angle is formed between one side of the barb and the outer peripheral surface of the joint core body 11, an acute angle is formed between the other side of the barb and the outer peripheral surface of the joint core body 11, when the rubber hose 2 is squeezed, the acute angle is difficult to be completely filled by rubber, and the problem that the seal between the rubber hose 2 and the joint core is poor exists. In this embodiment, the cross section of the groove 12 is isosceles trapezoid, and when the rubber hose 2 is extruded, the groove 12 can be filled with the rubber hose, and an O-shaped sealing ring is formed at the position of the groove 12. So set up, solved among the prior art between "barb" type joint core and the rubber hose 2 leakproofness not good, the problem that the medium leaked easily.

In a preferred embodiment of the present invention, the groove bottom of the groove 12 and the side wall of the groove 12 and the outer peripheral surface of the joint core body 11 are connected by arc surfaces. That is, rounded corners are provided at the corners of the groove 12. So set up, can prevent that the corner position of recess 12 from causing the damage to the inner wall of rubber hose 2, influencing rubber hose 2 and even the life of rubber tube assembly.

In the present embodiment, the pitch between any two adjacent grooves 12 is equal. So set up, the effect of power between joint core 1 and the rubber hose 2 is comparatively even for it is more firm to cooperate to be connected between joint core 1 and the rubber hose 2, can also improve the stability and the life of rubber tube assembly. Further, the number of the grooves 12 is set to six. Repeated experiments by the inventor summarize that the grooves 12 are six, that is, six O-shaped sealing rings are arranged between the joint core body 11 and the rubber hose 2, so that excellent sealing performance between the joint core 1 and the rubber hose 2 can be ensured.

Preferably, the inner surface of the crimping sleeve 3 is provided with a plurality of protruding rings 31 extending along the circumferential direction thereof, and the number of the protruding rings 31 is also six, and corresponds to the grooves 12 of the joint core one by one. So set up, when the bulge loop 31 extrudees rubber hose 2, the rubber hose 2 of being convenient for is filled in with recess 12 fully.

In the present embodiment, the depth of the groove 12 is 2.5 mm to 3.5 mm, that is, the height of the isosceles trapezoid is 2.5 mm to 3.5 mm, and as a preferred embodiment of the present invention, the height of the isosceles trapezoid is set to be 2 mm. The upper bottom of the isosceles trapezoid is set to be 3 millimeters, and the lower bottom is set to be 4 millimeters. If isosceles trapezoid's height is on the high side, the degree of difficulty that rubber hose 2 filled up recess 12 increases, if isosceles trapezoid's height is on the low side, then the frictional force between joint core 1 and rubber hose 2 can reduce, increases the risk that joint core 1 drops from rubber hose 2.

So set up, have fine leakproofness between joint core 1 and the rubber hose 2, can also avoid the problem that the rubber tube assembly takes off the head.

In this embodiment, the outer circumferential surface of the joint core body 11 is provided with a locking groove 13, and the locking groove 13 extends along the circumferential direction of the joint core body 11. The buckling sleeve 3 is provided with a clamping ring 32 extending along the circumferential direction of the buckling sleeve, the clamping ring 32 can penetrate into the clamping groove 13, and when buckling is carried out, the buckling sleeve 3 is connected with the joint core 1 in a positioning mode.

The following description specifically describes the present joint core 1 with reference to the above embodiments, in this embodiment, the joint core 1 includes a joint core body 11, a groove 12 is provided on an outer peripheral surface of the joint core body 11, the groove 12 is recessed toward a central axis direction of the joint core body 11, a cross section of the groove 12 is in an isosceles trapezoid shape, the number of the grooves 12 is six, and a distance between any two adjacent grooves 12 is equal. The groove bottom of the groove 12 and the side wall of the groove 12 and the outer peripheral surface of the joint core body 11 are connected through arc surfaces. The height of the cross section of the groove 12 is set to 2 mm, the upper bottom is set to 3 mm, and the lower bottom is set to 4 mm. The outer peripheral surface of the joint core body 11 is provided with a clamping groove 13, and the clamping groove 13 extends along the circumferential direction of the joint core body 11 and is used for being matched with a clamping ring 32 on the buckling sleeve 3. So set up, the shape of recess 12's cross section is isosceles trapezoid, and when rubber hose 2 received the extrusion, can fully fill up in the recess 12, forms "O" shape sealing washer in the position of recess 12, and six "O" shape sealing washers are sealed between with the outer wall of joint core body 11 and rubber hose 2's the inner wall, and it is not good to have solved among the prior art leakproofness between "barb" type joint core and the rubber hose 2, leads to the problem of dielectric leakage.

The invention also provides a rubber tube assembly, please refer to fig. 2, the rubber tube assembly comprises a joint core 1, a rubber hose 2 and a buckling and pressing sleeve 3, the rubber hose 2 is sleeved on the periphery of the joint core 1, the buckling and pressing sleeve 3 is sleeved on the periphery of the rubber hose 2 and is arranged at the connecting position of the joint core 1 and the rubber hose 2, and the joint core 1 is the joint core 1 in the above embodiment. So set up, when rubber hose 2 received the extrusion, can fully fill up in the recess 12, form "O" shape sealing washer in the position of recess 12, six "O" shape sealing washers are sealed between with the outer wall of joint core body 11 and rubber hose 2's the inner wall, have solved among the prior art "barb" type joint core and rubber hose 2 between the leakproofness not good, lead to the problem of medium leakage.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the invention comprise basic schemes, are independent from each other and are not restricted with each other, but can be combined with each other under the condition of no conflict, so that multiple effects are realized together.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The joint core is characterized by comprising a joint core body (11), wherein a plurality of grooves (12) extending along the circumferential direction of the joint core body (11) are formed in the outer circumferential surface of the joint core body, the grooves (12) are sunken towards the central axis direction of the joint core body (11), and the cross section of each groove (12) is in an isosceles trapezoid shape.

2. The joint core according to claim 1, wherein the groove bottom of the groove (12) and the side wall of the groove (12) and the outer peripheral surface of the joint core body (11) are connected by a circular arc surface.

3. The joint core according to claim 1, wherein the spacing between any two adjacent grooves (12) is equal.

4. Splice core according to claim 1, characterized in that the number of grooves (12) is provided as six.

5. Splice core according to claim 1, characterized in that the depth of the groove (12) is 2.5 mm to 3.5 mm.

6. The joint core according to claim 1, wherein the joint core body (11) is provided with a clamping groove (13) on the outer circumferential surface for positioning connection with the crimping sleeve (3), and the clamping groove (13) extends along the circumferential direction of the joint core body (11).

7. A hose assembly comprising a joint core, wherein the joint core is as defined in any one of claims 1 to 6.