Automobile pipeline joint

Abstract

The invention relates to the technical field of pipeline joint structures, in particular to an automobile pipeline joint which is provided with a fixing head and a plug, the fixing head comprises a threaded cylinder and a plug-in cylinder, external threads are arranged outside the threaded cylinder, a slot communicated with the interior of the plug-in cylinder is formed in the outer wall of the plug-in cylinder, and the plug-in cylinder is arranged in the slot. Clamping protrusions are arranged on the outer wall, on the two sides of the inserting groove in the inner wall of the inserting cylinder, of the inserting cylinder, a baffle ring is inserted into the inserting groove, a U-shaped clamping part is arranged on the outer wall of the baffle ring, the inner wall of the closed end of the U-shaped clamping part is integrally connected with the baffle ring, and the two side walls of the open end of the U-shaped clamping part are clamped on the side walls of the clamping protrusions respectively. A step groove is formed in the inner wall, close to one side of the threaded cylinder, of the inserting groove, a sealing ring is inserted into the step groove, one side of the sealing ring makes contact with the side wall of the step groove, the other side of the sealing ring makes contact with the baffle ring, and the plug is inserted into the inserting cylinder through the inner wall of the baffle ring and sealed through the sealing ring. The connector has the advantages of simple structure, high connection strength, good sealing cover effect, convenience in insertion and installation and the like.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline joint structures, in particular to an automobile pipeline joint. Background Art

[0002] As we all know, the automobile pipe joint is the joint of the pipe inside the automobile, generally called HEN joint, and the coolant is passed through it. The existing structure generally includes a fixed head and a plug. During use, the plug is inserted into the fixed head to connect the two pipes. The existing installation method is generally to insert a sealing ring with a circular cross-section into the fixed head first. The insertion force of the circular sealing ring is large, and it is difficult to meet its sealing effect in occasions where the insertion force requirement is small. There are also structures that use an internal inverted structure. This structure has many parting lines and is prone to burrs that damage the sealing ring. The connection strength between the fixed head and the plug is insufficient, resulting in the bursting force not meeting the requirements. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art and to provide an automobile pipe joint which has a simple structure, high connection strength, good sealing cover effect and convenient plug-in installation.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A car pipe joint is provided with a fixed head and a plug. The fixed head includes a threaded barrel and a plug-in barrel. The outside of the threaded barrel is provided with an external thread. The threaded barrel and the plug-in barrel are integrally formed and connected. The invention is characterized in that a slot communicating with the inside of the plug-in barrel is provided on the outer wall of the plug-in barrel, and clamping protrusions are provided on the outer walls of the plug-in barrel on both sides of the slot on the inner wall of the plug-in barrel. A retaining ring is inserted into the slot, and a U-shaped clamping portion is provided on the outer wall of the retaining ring. The inner wall of the closed end of the U-shaped clamping portion is integrally connected with the retaining ring, and the two side walls of the open end of the U-shaped clamping portion are respectively clamped on the side walls of the clamping protrusion. A step groove is provided on the inner wall of the plug-in barrel close to the threaded barrel of the slot, and a sealing ring is inserted into the step groove, one side of the sealing ring contacts the side wall of the step groove, and the other side of the sealing ring contacts the retaining ring. The plug is inserted into the inside of the plug-in barrel through the inner wall of the retaining ring and is sealed by the sealing ring.

[0005] The sealing ring described in the present invention is an X-shaped sealing ring, which reduces the insertion force.

[0006] The slot described in the present invention has a snap-in hole on the outer wall of the plug-in tube away from the threaded tube, and the outer wall of the plug is provided with a snap-in groove corresponding to the position of the snap-in hole. The snap spring is inserted into the snap-in groove of the plug through the snap-in hole on the outer wall of the plug-in tube, thereby realizing axial fixation of the plug-in tube and the plug.

[0007] The plug-in tubes at both ends of the slot described in the present invention are provided with limiting protrusions, the limiting protrusions are provided with limiting grooves connected to the slot, and the retaining ring is provided with a plug-in protrusion with the same position as the limiting groove. The limiting protrusions and the limiting grooves ensure that the retaining ring can be smoothly inserted into the plug-in tube, and the structural strength of the plug-in tube can also be guaranteed.

[0008] The plug-in tube of the present invention is provided with a plug-in hole, and the retaining ring is provided with a plug-in connector corresponding to the position of the plug-in hole, and the plug-in connector is inserted into the plug-in hole to realize fixed plug-in of the plug-in tube and the retaining ring.

[0009] The side surface of the clamping hole of the present invention is provided with a force unloading hole which is connected with the clamping hole. After the clamping spring is moved into the force unloading hole, the plug can be pulled out or inserted.

[0010] The outer wall of the plug-in tube on the side of the force unloading hole on the side of the clamping hole at both ends of the clamping spring described in the present invention is provided with a triangular protrusion, and the triangular protrusion is integrally connected with the plug-in tube. By toggling the two ends of the clamping spring, the clamping spring is clamped into or disengaged from the triangular protrusion, thereby realizing manual locking and spreading of the clamping spring.

[0011] The retaining spring described in the present invention is configured as a semi-annular retaining spring, which includes a clamping portion, an elastic portion and an end portion. The elastic portion is provided with a clamping portion protruding toward the inner side of the elastic portion, and the two ends of the elastic portion are provided with ends which are inserted into the end positioning grooves on the plug-in tube.

[0012] The retaining spring described in the present invention is configured as a semi-annular retaining spring, which includes a clamping portion, an elastic portion and an end portion. The elastic portion is provided with a clamping portion protruding toward the inner side of the elastic portion, and the two ends of the elastic portion are provided with ends which are inserted into the end positioning grooves on the plug-in tube.

[0013] The present invention has the advantages of simple structure, high connection strength, good sealing cover effect, convenient plug-in installation, etc. due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 yes Figure 1 sectional view of .

[0016] Figure 3 It is a cross-sectional view of the fixing head of the present invention.

[0017] Figure 4 It is a structural schematic diagram of the retaining ring of the present invention.

[0018] Figure 5 It is a structural diagram of the circlip.

[0019] Figure 6 It is a schematic diagram of the structure of the plug. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings: As shown in the accompanying drawings, an automobile pipeline joint is provided with a fixed head and a plug 1, the fixed head includes a threaded barrel 2 and a plug-in barrel 3, the outer side of the threaded barrel 2 is provided with an external thread, the threaded barrel 2 and the plug-in barrel 3 are integrally formed and connected, it is characterized in that the outer wall of the plug-in barrel 3 is provided with a slot 4 connected to the inside of the plug-in barrel 3, the inner wall of the plug-in barrel 3 on both sides of the slot 4 is provided with a clamping protrusion 5, the slot 4 is inserted into the outer wall of the plug-in barrel 3, the retaining ring 6 is inserted into the slot 4, the outer wall of the retaining ring 6 is provided with a U-shaped clamping portion 7, the inner wall of the closed end of the U-shaped clamping portion 7 is integrally connected with the retaining ring 6, the two side walls of the open end of the U-shaped clamping portion 7 are respectively clamped on the side walls of the clamping protrusion 5, the inner wall of the plug-in barrel 3 of the slot 4 close to the threaded barrel 2 is provided with a step groove 8, the step groove 8 is inserted into a sealing ring 9, one side of the sealing ring 9 is in contact with the side wall of the step groove 8, the other side of the sealing ring 9 is in contact with the retaining ring 6, the plug 1 is inserted into the inside of the plug-in barrel 3 through the inner wall of the retaining ring 6 and is sealed by the sealing ring 9.

[0021] Furthermore, the sealing ring 9 is an X-shaped sealing ring 9 to reduce the insertion force.

[0022] Furthermore, a snap-in hole 10 is provided on the outer wall of the plug-in tube 3 on the side of the slot 4 away from the threaded tube 2, and a snap-in groove 11 corresponding to the position of the snap-in hole 10 is provided on the outer wall of the plug 1. The snap-in spring 12 is inserted into the snap-in groove 11 of the plug 1 through the snap-in hole 10 on the outer wall of the plug-in tube 3, thereby realizing axial fixation of the plug-in tube 3 and the plug 1.

[0023] Furthermore, the plug-in tube 3 at both ends of the slot 4 is provided with a limiting protrusion 13, the limiting protrusion 13 is provided with a limiting groove 14 connected to the slot 4, and the retaining ring 6 is provided with a plug-in protrusion 15 with the same position as the limiting groove 14. The limiting protrusion 13 and the limiting groove 14 ensure that the retaining ring 6 is smoothly inserted into the plug-in tube 3, and the structural strength of the plug-in tube 3 can also be ensured at the same time.

[0024] Furthermore, the plug-in tube 3 is provided with a plug-in hole 16 , and the retaining ring 6 is provided with a plug connector 17 corresponding to the position of the plug-in hole 16 , and the plug-in connector 17 is inserted into the plug-in hole 16 to achieve fixed connection between the plug-in tube 3 and the retaining ring 6 .

[0025] Furthermore, a force unloading hole 18 communicating with the clamping hole 10 is provided on the side of the clamping hole 10 , and the clamping spring 12 is moved into the force unloading hole 18 to thereby withdraw the plug 1 or insert the plug 1 .

[0026] Furthermore, a triangular protrusion 19 is provided on the outer wall of the plug-in tube 3 on the side of the force unloading hole 18 on the side of the clamping hole 10 at both ends of the clamping spring 12. The triangular protrusion 19 is integrally connected with the plug-in tube 3. By moving the two ends of the clamping spring 12, the clamping spring 12 is clamped into the triangular protrusion 19 or disengaged from the triangular protrusion 19, thereby realizing manual locking and spreading of the clamping spring 12.

[0027] Furthermore, the retaining spring 12 is configured as a semi-annular retaining spring 12, which includes a clamping portion 20, an elastic portion 21 and an end portion 22. The elastic portion 21 is provided with a clamping portion 20 protruding toward the inner side of the elastic portion 21, and the two ends of the elastic portion 21 are provided with end portions 22, which are inserted into the end positioning groove 23 on the upper end portion of the plug-in tube 3.

[0028] When the present invention is in use, firstly, the X-shaped sealing ring 9 is inserted through the opening of the plug-in tube 3, and the X-shaped sealing ring 9 is inserted straight into the step groove 8 position, and then the retaining ring 6 is inserted into the plug-in tube 3 through the slot 4 of the plug-in tube 3, the plug-in protrusion 15 of the retaining ring 6 is inserted into the limiting groove 14 of the limiting protrusion 13, and the plug connector 17 of the retaining ring 6 is inserted into the plug-in hole 16 of the plug-in tube 3. The two side walls of the opening end of the U-shaped clamping portion 207 of the retaining ring 6 are clamped on the side walls of the clamping protrusion 5 of the plug-in tube 3, one side wall of the X-shaped sealing ring 9 contacts the side wall of the step groove 8, and the other side wall of the X-shaped sealing ring 9 contacts the side wall of the retaining ring 6, the retaining spring 12 is moved into the unloading hole 18 and the two end portions 22 of the retaining spring 12 are moved onto the straight triangular protrusions 19, and then the plug 1 is inserted. After the plug 1 is inserted, the retaining spring 12 is moved straight into the clamping hole 10, and the clamping portion 207 of the retaining ring 12 is clamped on the side wall of the clamping protrusion 5 of the plug-in tube 3. 0 extends into the card hole 10 and is inserted into the card groove 11 of the plug 1, thereby completing the plug-in connection between the plug-in tube 3 and the plug 1. The above-mentioned fixed head and the plug 1 are both made of PA66+GF30 or PA66 material to reduce costs. An X-shaped sealing ring 9 is adopted to reduce the insertion force, and the insertion method and direction of the retaining ring 6 are changed (the existing retaining ring 6 is inserted from the end 22 like the sealing ring 9). There is a specially designed undercut in the shape of a U-shaped card portion 207 on the retaining ring 6, so that the retaining ring 6 can be fastened to the plug-in tube 3 after installation and will not be separated due to external force, thereby enhancing the assembly strength of the plug-in tube 3 and the retaining ring 6; the design of the retaining spring 12, the card hole 10, the unloading hole 18 and the triangular protrusion 19 is changed to be more convenient for manual operation. Due to the adoption of the above structure, the present invention has the advantages of simple structure, high connection strength, good sealing cover effect, and convenient plug-in installation.

Claims

1. An automobile pipe joint, provided with a fixed head and a plug, wherein the fixed head comprises a threaded barrel and a plug-in barrel, the outer surface of the threaded barrel is provided with an external thread, and the threaded barrel and the plug-in barrel are integrally formed and connected, characterized in that The outer wall of the plug-in tube is provided with a slot connected to the inside of the plug-in tube, and the outer walls of the plug-in tube on both sides of the slot on the inner wall of the plug-in tube are provided with clamping protrusions, a retaining ring is inserted into the slot, and a U-shaped clamping part is provided on the outer wall of the retaining ring. The inner wall of the closed end of the U-shaped clamping part is integrally connected with the retaining ring, and the two side walls of the open end of the U-shaped clamping part are respectively clamped on the side walls of the clamping protrusion. A step groove is provided on the inner wall of the plug-in tube close to the threaded tube side of the slot, and a sealing ring is inserted into the step groove, one side of the sealing ring contacts the side wall of the step groove, and the other side of the sealing ring contacts the retaining ring. The plug is inserted into the interior of the plug-in tube through the inner wall of the retaining ring and is sealed by the sealing ring.

2. An automobile pipe joint according to claim 1, characterized in that The sealing ring is an X-shaped sealing ring.

3. The automobile pipe joint according to claim 1, characterized in that A snap-in hole is provided on the outer wall of the plug-in tube on the side of the slot away from the threaded tube, and a snap-in groove corresponding to the position of the snap-in hole is provided on the outer wall of the plug. The snap spring is inserted into the snap-in groove of the plug through the snap-in hole on the outer wall of the plug-in tube, thereby realizing axial fixation of the plug-in tube and the plug.

4. The automobile pipe joint according to claim 1, characterized in that The plug-in tubes at both ends of the slot are provided with limiting protrusions, the limiting protrusions are provided with limiting grooves connected to the slot, and the retaining ring is provided with a plug-in protrusion at the same position as the limiting groove. The limiting protrusions and the limiting grooves ensure that the retaining ring can be smoothly inserted into the plug-in tube.

5. The automobile pipe joint according to claim 1, characterized in that The plug-in tube is provided with a plug-in hole, and the retaining ring is provided with a plug-in connector corresponding to the position of the plug-in hole. The plug-in connector is inserted into the plug-in hole to realize fixed plug-in of the plug-in tube and the retaining ring.

6. The automobile pipe joint according to claim 3, characterized in that A force unloading hole connected with the clamping hole is arranged on the side of the clamping hole, and the plug can be pulled out or inserted after the clamping spring is moved into the force unloading hole.

7. An automobile pipe joint according to claim 6, characterized in that A triangular protrusion is provided on the outer wall of the plug-in tube on the side of the force unloading hole on the side of the clamping hole at both ends of the clamping spring, and the triangular protrusion is integrally connected with the plug-in tube. The clamping spring is manually locked and stretched by toggling the two ends of the clamping spring so that the clamping spring is clamped into or disengaged from the triangular protrusion.

8. The automobile pipe joint according to claim 3, characterized in that The retaining spring is configured as a semi-annular retaining spring, which includes a clamping portion, an elastic portion and an end portion. The elastic portion is provided with a clamping portion protruding toward the inner side of the elastic portion. The two ends of the elastic portion are provided with ends which are inserted into the end positioning grooves on the plug-in tube.

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