Connecting structure of rubber tube and metal joint

Abstract

The utility model discloses a connecting structure of a rubber tube and a metal joint, the rubber tube is composed of a rubber tube layer and a braid layer, the rubber tube layer is arranged inside the braid layer, the braid layer is arranged outside the rubber tube layer, the connecting structure is characterized in that a lining is arranged inside the rubber tube layer, the metal joint is inserted between the rubber tube layer and the braid layer, a steel ring is arranged in the braid layer and used for supporting, and the metal joint is arranged in the braid layer. An external thread sleeve is sleeved on the periphery of the braid layer, an internal thread sleeve is arranged outside the external thread sleeve, and the external thread sleeve and the internal thread sleeve are mutually screwed in a threaded mode to fix the metal connector and lock the braid layer between the metal connector and the external thread sleeve. A riveting connection mode can be replaced, the strength of the rubber pipe cannot be reduced while the metal joint is connected with the rubber pipe, the braided wire cannot be damaged, and compared with the riveting connection mode, the product strength is higher.

Description

Technical Field

[0001] The utility model relates to a connection structure of a rubber hose and a metal joint, belonging to the technical field of rubber hose connection. Background Art

[0002] Automobile hose pipeline assembly is generally composed of rubber hose, joints, clamp fastening devices, special valve bodies, electronic components, etc. At present, hoses and metal joints in the market are mainly connected by riveting. The advantage of riveting machine is high efficiency, but the disadvantage is also obvious. The riveting machine will crush or even break the braided layer during riveting, thereby reducing the strength of the hose. Utility Model Content

[0003] The utility model aims to solve the problem that riveting may damage the braided layer, and provides a connecting structure of a hose and a metal joint instead of riveting, which can realize the connection between the metal joint and the hose without reducing the strength of the hose.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a connection structure between a rubber hose and a metal joint, the rubber hose is composed of a rubber hose layer and a braided layer, the rubber hose layer is inside and the braided layer is outside, an inner lining is provided inside the rubber hose layer, a metal joint is inserted between the rubber hose layer and the braided layer, a steel ring is provided inside the braided layer for support, and an externally threaded sleeve is sleeved on the outer periphery of the braided layer, an internally threaded sleeve is installed outside the externally threaded sleeve, the externally threaded sleeve and the internally threaded sleeve are screwed together in a threaded form to fix the metal joint and lock the braided layer between the metal joint and the externally threaded sleeve.

[0005] Furthermore, the metal joint is divided into an upper top portion and a lower locking portion, the periphery of the upper top portion is exposed to the outside, and the lower locking portion is inserted between the hose layer and the braided layer and sandwiched between the hose layer and the braided layer.

[0006] Furthermore, a first concave annular groove is provided on the inner wall of the upper top portion, and a first convex ring is provided around the upper end portion of the liner. After being assembled, the first concave annular groove and the first convex ring cooperate with each other to fix the hose layer of the hose.

[0007] Furthermore, a downwardly extending fixing ear is provided below the upper top portion, and a second concave ring groove is provided at the upper end of the lower locking portion. A cavity is formed at the junction of the upper top portion and the lower locking portion through the fixing ear and the second concave ring groove, and the top portion of the braided layer after installation is located in the cavity.

[0008] Furthermore, the steel ring is located at the top end of the braided layer and is located in the cavity after installation.

[0009] Furthermore, the number of the steel ring is set to one, and the steel ring bends the rubber hose layer inside it, and at the same time the steel ring cooperates with the cavity groove of the metal joint to prevent the rubber hose from falling off.

[0010] Furthermore, the inner diameter of the top end of the internally threaded sleeve is the same as the outer diameter of the fixing ear, and the braided layer is sealed in the cavity after the two are installed.

[0011] Furthermore, a second raised ring is provided on the inner wall of the bottom end of the lower locking portion of the metal joint.

[0012] Furthermore, the inner diameter of the externally threaded sleeve is the same as the outer diameter of the hose, and the externally threaded sleeve is tightly sleeved on the outer layer of the hose.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the structure provides a new type of connection method between the hose and the joint, which can replace the riveted connection method between the metal joint and the hose. While realizing the connection between the metal joint and the hose, the strength of the hose will not be reduced and the braided wire will not be damaged. Compared with the riveting method, the product strength is higher, and the pressure of the riveting on the hose is uncontrollable. The connection method provided by the utility model changes the pressure into radial force, and the fit between the hose and the metal joint can be flexibly adjusted through threaded fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of the overall structure of the hose and the metal joint connected to the utility model.

[0015] Figure 2 Schematic diagram of the structure of the lining.

[0016] Figure 3 It is a structural schematic diagram of a metal joint.

[0017] Figure 4 It is a schematic diagram of the structure of an external threaded sleeve.

[0018] Figure 5 It is a structural schematic diagram of an internal threaded sleeve.

[0019] Markings in the figure are: 1 inner liner, 2 metal joint, 3 hose layer, 4 steel ring, 5 braided layer, 6 external threaded sleeve, 7 internal threaded sleeve, 8-first raised ring, 9-first concave ring groove, 10-second concave ring groove, 11-cavity groove, 12-fixing ear, 13-second raised ring. DETAILED DESCRIPTION

[0020] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1-5The utility model provides an embodiment: a connection structure of a hose and a metal joint, the hose consisting of a hose layer 3 and a braided layer 5, the hose layer 3 is inside, the braided layer 5 is outside, an inner lining 1 is provided inside the hose layer 3, a metal joint 2 is inserted between the hose layer 3 and the braided layer 5, a steel ring 4 is provided inside the braided layer 5 for support, and an externally threaded sleeve 6 is sleeved on the outer periphery of the braided layer 5, an internally threaded sleeve 7 is installed outside the externally threaded sleeve 6, the externally threaded sleeve 6 and the internally threaded sleeve 7 are screwed together in a threaded form to fix the metal joint 2 and lock the braided layer 5 between the metal joint 2 and the externally threaded sleeve 6.

[0022] The inner liner 1 is mainly assembled inside the rubber hose to play a supporting role, and cooperates with other metal parts to fix the rubber hose.

[0023] The metal joint 2 is divided into an upper top portion and a lower locking portion, wherein the periphery of the upper top portion is exposed to the outside, and the lower locking portion is inserted between the hose layer 3 and the braided layer 5, and is sandwiched between the hose layer 3 and the braided layer 5. A first concave annular groove 9 is provided on the inner wall of the upper top portion, and a first convex ring 8 is provided around the upper end of the liner 1. After being assembled, the first concave annular groove 9 and the first convex ring 8 cooperate with each other to fix the hose layer 3 of the hose.

[0024] A fixing ear 12 extending downward is provided below the upper top portion, and a second concave annular groove 10 is provided at the upper end of the lower locking portion. A cavity 11 is formed at the junction of the upper top portion and the lower locking portion through the fixing ear 12 and the second concave annular groove 10, and the top end of the braided layer 5 after installation is located in the cavity 11. At the same time, a second raised ring 13 is also provided on the inner wall of the bottom end of the lower locking portion.

[0025] The steel ring 4 is located at the top end of the braided layer 5 and is located in the cavity 11 after installation. Usually, the number of the steel ring 4 is one, and the steel ring 4 bends the rubber hose layer 3 inside it, and the steel ring 4 cooperates with the cavity 11 of the metal joint 2 to prevent the rubber hose from falling off.

[0026] The inner diameter of the top end of the internal threaded sleeve 7 is the same as the outer diameter of the fixing ear 12. After the two are installed, the braided layer 5 is sealed in the cavity. The inner diameter of the external threaded sleeve 6 is the same as the outer diameter of the hose, and the external threaded sleeve 6 is tightly sleeved on the outer layer of the hose.

[0027] The assembly process of the utility model is as follows: during assembly, the inner liner is first inserted into the interior of the hose, and then the metal joint is inserted into the hose layer and the braided layer of the hose, the protrusion on the upper part of the inner liner cooperates with the groove on the inner wall of the metal joint to fix the hose layer of the hose, and at the same time, an external threaded sleeve is inserted from the other end of the hose, the external threaded sleeve cooperates with the metal joint to fix the braided layer of the hose, and finally the internal threaded sleeve is cooperated with the external threaded sleeve and tightened to complete the assembly. After the assembly is completed, the top of the internal threaded sleeve cooperates with the outer end of the metal joint to form a cavity, and the cavity contains the braided layer of the hose.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the utility model in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the utility model.

[0029] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A connection structure between a hose and a metal joint, wherein the hose is composed of a hose layer and a braided layer, wherein the hose layer is inside and the braided layer is outside, and wherein: An inner lining is provided inside the hose layer, a metal joint is inserted between the hose layer and the braided layer, a steel ring is provided inside the braided layer for support, and an externally threaded sleeve is sleeved on the outer periphery of the braided layer, an internally threaded sleeve is mounted outside the externally threaded sleeve, and the externally threaded sleeve and the internally threaded sleeve are screwed together in a threaded form to fix the metal joint and lock the braided layer between the metal joint and the externally threaded sleeve.

2. The connection structure of a hose and a metal joint according to claim 1, characterized in that: The metal joint is divided into an upper top portion and a lower locking portion. The periphery of the upper top portion is exposed to the outside, and the lower locking portion is inserted between the hose layer and the braided layer and sandwiched between the hose layer and the braided layer.

3. The connection structure of a hose and a metal joint according to claim 2, characterized in that: A first concave annular groove is provided on the inner wall of the upper top end portion, and a first convex ring is provided around the upper end portion of the liner. After being assembled, the first concave annular groove and the first convex ring cooperate with each other to fix the hose layer of the hose.

4. The connection structure of a hose and a metal joint according to claim 2, characterized in that: A downwardly extending fixing ear is provided below the upper top portion, and a second concave ring groove is provided at the upper end of the lower locking portion. A cavity is formed at the junction of the upper top portion and the lower locking portion through the fixing ear and the second concave ring groove, and the top portion of the braided layer after installation is located in the cavity.

5. The connection structure of a hose and a metal joint according to claim 4, characterized in that: The steel ring is located at the top end of the braided layer and is located in the cavity after installation.

6. The connection structure of a hose and a metal joint according to claim 5, characterized in that: The number of the steel ring is set to one, and the steel ring bends the rubber hose layer inside the steel ring. At the same time, the steel ring cooperates with the cavity groove of the metal joint to prevent the rubber hose from falling off.

7. The connection structure of a hose and a metal joint according to claim 4, characterized in that: The inner diameter of the top end of the internal threaded sleeve is the same as the outer diameter of the fixing ear, and the braided layer is sealed in the cavity after the two are installed.

8. The connection structure of a hose and a metal joint according to claim 2, characterized in that: A second protruding ring is arranged on the inner wall of the bottom end of the lower locking portion of the metal joint.

9. The connection structure of a hose and a metal joint according to claim 1, characterized in that: The inner diameter of the external threaded sleeve is the same as the outer diameter of the hose, and the external threaded sleeve is tightly sleeved on the outer layer of the hose.

Images