Automobile cooling water inlet joint and rubber pipe connecting fastening structure

Abstract

The utility model belongs to water pipe connecting structure technical field, specifically provide a kind of automobile cooling water inlet connector and rubber tube connection fastening structure, including automobile cooling water inlet connector, rubber tube and pipe clamp, automobile cooling water inlet connector is provided with annular first recess, pipe clamp is designed as injection molding and integrally formed in automobile cooling water inlet connector and rubber tube outside, eliminate the risk that traditional metal clamp causes screw loosening to lead to locking force drop.Pipe clamp's first positioning part is embedded in the first recess of automobile cooling water inlet connector, forms firm mechanical interlocking, effectively prevents the axial displacement between pipe clamp and automobile cooling water inlet connector.Meanwhile, the entire pipe clamp tightly wraps and binds rubber tube end on connector, enhances the bonding strength and anti-pullout ability between rubber tube and connector, significantly improves the long-term stability and sealing reliability of connection structure under complex working conditions such as vibration, water pressure fluctuation.

Description

Technical Field

[0001] This application belongs to the technical field of water pipe connection structure, specifically a fastening structure for connecting and fastening a car cooling water inlet connector and a rubber hose. Background Technology

[0002] The connection and fastening of the coolant inlet connector and hose in commercial truck cooling systems is a critical technical aspect, as its reliability directly affects the stable operation and service life of the cooling system. Commercial trucks face complex road conditions and operating environments during operation, requiring the coolant inlet connector to withstand continuous water pressure while also dealing with external forces such as vibration and bumps generated by vehicle movement. Therefore, the stability and durability of the connection and fastening structure are of paramount importance.

[0003] Currently, the commonly used water pipe connection and fastening structure in the industry consists of a nylon connector, an inlet hose, and a metal clamp. The specific connection method involves fitting the inlet hose onto the nylon connector and then securing it with the metal clamp to achieve a sealed connection. However, in actual use, this traditional structure can lead to the metal clamp screws gradually loosening due to vibration and other factors, resulting in a continuous decrease in the locking force applied by the clamp to the hose. With prolonged use, the problem of insufficient locking force becomes increasingly prominent, potentially causing the inlet hose to detach from the nylon connector, resulting in coolant leakage and affecting the normal operation of the truck. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a fastening structure for connecting and fastening a car cooling water inlet connector and a hose, so as to solve the technical problem of insufficient connection strength between the water inlet hose and the connector in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a fastening structure for connecting and securing an automotive coolant inlet connector and a hose, comprising: An automotive cooling water inlet connector has a first connecting end, and an annular first groove is formed on the outer peripheral surface of the first connecting end. A hose having a second connecting end, the second connecting end being sleeved on the outer periphery of the first connecting end and forming a gap or alignment with the first groove; and The pipe clamp is an injection molded part and is integrally formed on the outer periphery of the second connecting end sleeve portion. One end of the pipe clamp has a first positioning part that is accommodated in the first groove.

[0006] In one possible implementation, the first connecting end also has an annular stop portion formed on the side of the first groove adjacent to its own end face, the stop portion being located on the side of the first groove near the end face of the first connecting end, and the second connecting end abutting against the stop portion.

[0007] In one possible implementation, an annular second groove is provided on the outer periphery of the second connecting end, and the portion of the clamp extending to the second connecting end has a second positioning portion accommodated within the second groove.

[0008] In one possible implementation, the second groove is provided in multiple spaces along the length direction of the second connecting end, and the second positioning part corresponds to the second groove one by one.

[0009] In one possible implementation, the outer periphery of the first connecting end is provided with an annular anti-detachment barb, the anti-detachment barb being located on the side of the first groove adjacent to the end face of the first connecting end.

[0010] In one possible implementation, the outer periphery of the first connecting end is provided with a plurality of annular protrusions spaced apart along its own axial direction, and the first groove is formed between two adjacent protrusions. The first positioning part corresponds one-to-one with the first groove. The hose abuts against the protrusions adjacent to the end face of the first connecting end.

[0011] In one possible implementation, the bottom of the first groove is rounded.

[0012] In one possible implementation, both the vehicle cooling water inlet connector and the hose clamp are made of nylon.

[0013] Compared with the prior art, the beneficial effects of the automotive coolant inlet connector and hose connection fastening structure provided in this application are: The automotive cooling water inlet connector and hose connection fastening structure provided in this application includes an automotive cooling water inlet connector, a hose, and a hose clamp. The automotive cooling water inlet connector has an annular first groove. The hose clamp is designed as an injection molded part and integrally formed on the outside of the automotive cooling water inlet connector and the hose, eliminating the risk of reduced locking force due to loose screws in traditional metal clamps. The first positioning part of the hose clamp is embedded in the first groove of the automotive cooling water inlet connector, forming a strong mechanical interlock, effectively preventing axial displacement between the hose clamp and the automotive cooling water inlet connector. At the same time, the entire hose clamp tightly wraps around and binds the end of the hose to the connector, enhancing the bonding strength and pull-out resistance between the hose and the connector, and significantly improving the long-term stability and sealing reliability of the connection structure under complex working conditions such as vibration and water pressure fluctuations. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the existing technology that uses clamps to connect the automotive cooling water inlet connector and hose; Figure 2 This is a schematic diagram of the connection and fastening structure between the automotive cooling water inlet connector and the hose provided in Embodiment 1 of this application. Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 This is a schematic diagram of the connection and fastening structure between the automotive cooling water inlet connector and the hose provided in Embodiment 2 of this application. Figure 5 This is a schematic diagram of the connection and fastening structure between the automotive cooling water inlet connector and the hose provided in Embodiment 3 of this application; Figure 6 This is a schematic diagram of the connection and fastening structure between the automotive cooling water inlet connector and the hose provided in Embodiment 4 of this application; Explanation of reference numerals in the attached figures: 1. Nylon connector; 2. Water inlet hose; 3. Metal clamp; 10. First connecting end; 11. First groove; 12. Stop part; 13. Anti-detachment barb; 14. Boss; 20. Second connecting end; 21. Second groove; 30. Pipe clamp; 31. First positioning part; 32. Second positioning part. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0017] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0018] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Please refer to the following: Figures 1 to 6 The following describes the fastening structure for connecting the automotive cooling water inlet connector and the hose provided in the embodiments of this application.

[0022] like Figure 1 The diagram shows a connection structure of a commercial truck coolant inlet hose assembly, comprising a nylon connector 1, a section of inlet hose 2, and a metal clamp 3. The truck coolant inlet hose needs to withstand a certain water pressure. The existing structure involves fitting the inlet hose 2 onto the nylon connector 1 and securing it with the metal clamp 3. However, the metal clamp 3 resonates with the vehicle body during operation, causing the clamp screws to loosen. This results in insufficient external tightening force on the hose, leading to detachment and failing to meet the vehicle's 100,000-kilometer maintenance-free service life requirement. Furthermore, if the coolant hose detaches, the inability to circulate coolant will cause overheating of the engine and other equipment, potentially damaging the truck.

[0023] To resolve the above issues, please refer to Figures 2 to 6In Embodiments 1, 2, 3, and 4, the automotive cooling water inlet connector and hose connection fastening structure provided in this application includes an automotive cooling water inlet connector, a hose, and a hose clamp 30. The automotive cooling water inlet connector has a first connecting end 10, and an annular first groove 11 is formed on the outer peripheral surface of the first connecting end 10; the hose has a second connecting end 20, which is sleeved on the outer periphery of the first connecting end 10 and forms a gap or alignment with the first groove 11; the hose clamp 30 is an injection molded part and is integrally formed on the outer periphery of the sleeve portion of the first connecting end 10 and the second connecting end 20, one end of the hose clamp 30 has a first positioning part 31 accommodated in the first groove 11, and the other end extends along the length direction of the hose to cover the outer periphery of the second connecting end 20.

[0024] Compared with the prior art, the beneficial effects of the automotive coolant inlet connector and hose connection fastening structure provided in this application are: The automotive cooling water inlet connector and hose connection fastening structure provided in this application includes an automotive cooling water inlet connector, a hose, and a hose clamp 30. The automotive cooling water inlet connector has an annular first groove 11. The hose clamp 30 is designed as an injection molded part and integrally formed on the outside of the automotive cooling water inlet connector and the hose, eliminating the risk of reduced locking force due to loose screws in traditional metal clamps 3. The first positioning part 31 of the hose clamp 30 is embedded in the first groove 11 of the automotive cooling water inlet connector, forming a strong mechanical interlock, effectively preventing axial displacement between the hose clamp 30 and the automotive cooling water inlet connector. At the same time, the entire hose clamp 30 tightly wraps and binds the end of the hose to the connector, enhancing the bonding strength and pull-out resistance between the hose and the connector, and significantly improving the long-term stability and sealing reliability of the connection structure under complex working conditions such as vibration and water pressure fluctuations.

[0025] As an injection-molded part, the hose clamp 30 can be made of nylon, polypropylene, or other engineering plastics, as long as it meets the required strength, toughness, resistance to thermal shock, and resistance to coolant corrosion. To improve the compatibility between the automotive coolant inlet connector and the hose clamp 30, they can be made of the same material, such as nylon. The hose can be made of rubber or silicone and is fitted around the first connecting end 10 with an interference fit.

[0026] The clamp 30 is integrally molded onto the outer periphery of the assembled automotive cooling water inlet connector's first connecting end 10 and the hose's second connecting end 20 using an injection molding process. During assembly, the hose's second connecting end 20 is fitted onto the automotive cooling water inlet connector's first connecting end 10, and then placed into the injection mold and pressed tightly. The mold's inner cavity and the hose, together with the automotive cooling water inlet connector, form an injection molding cavity. Nylon material is used for injection molding, and the molten material flows into the first groove 11 to form the first positioning part 31, thereby achieving axial and circumferential positioning of the clamp 30 and the automotive cooling water inlet connector. After cooling and shaping, an integral annular clamp 30 is machined at the connection between the automotive cooling water inlet connector and the hose.

[0027] In the specific implementation of this technical solution, the second connecting end 20 of the hose is first fitted onto the first connecting end 10 of the automotive coolant inlet connector to ensure proper assembly. Then, the assembly is placed into the corresponding cavity of the injection mold for injection molding. The injection molding material fills the mold cavity, covering the outer periphery of the first connecting end 10 (including the first groove 11) and part of the second connecting end 20. After cooling, a clamp 30 is formed that tightly bonds with both.

[0028] The second connecting end 20 is spaced apart from or aligned with the first groove 11. "Spaced apart from or aligned" means that the end of the second connecting end 20 and the first groove 11 are positioned along the axial direction. The purpose of this arrangement is to prevent the second connecting end 20 from blocking the first groove 11 and to ensure that the injection molding material can flow into the first groove 11.

[0029] The specific shape parameters of the first groove 11 are not limited. For example, the cross-sectional shape of the first groove 11 can be rectangular, trapezoidal, arc-shaped, or a combination thereof. The depth of the first groove 11 can be 0.5mm to 3mm, and the width can be 2mm to 8mm to ensure that the first positioning part 31 has sufficient mechanical locking force. The wall thickness of the pipe clamp 30 should not be too thin, and can be 2mm to 6mm to balance strength and weight.

[0030] After the clamp 30 is formed, its inner wall shape should fit tightly with the outer contour (including the groove) of the first connecting end 10 and the second connecting end 20. The length of the clamp 30 covering the second connecting end 20 can be designed as needed, for example, covering 30% to 100% of the total length of the second connecting end 20.

[0031] Please see Figure 3In Embodiment 1, the first connecting end 10 also forms an annular stop portion 12 on the side of the first groove 11 adjacent to its own end face. The stop portion 12 is located on the side of the first groove 11 near the end face of the first connecting end 10, and the second connecting end 20 abuts against the stop portion 12. The stop portion 12 can be an annular flange or a step that protrudes radially from the outer periphery of the first connecting end 10. Its cross-sectional shape can be a right-angled shoulder or a transition surface with a certain guiding taper, which facilitates positioning during hose assembly and ensures consistent insertion depth of the hose during mass production.

[0032] The stop portion 12 and the first groove 11 can be integrally injection molded onto the automotive coolant inlet connector, and the two are arranged adjacent to each other, with the stop portion 12 located on the side of the first groove 11 closer to the free end of the first connecting end 10. During hose assembly, the second connecting end 20 is pushed inward along the axial direction of the first connecting end 10 until the end face of the second connecting end 20 abuts against the side (or end face) of the stop portion 12. This provides a clear axial positioning reference for hose assembly, ensuring consistent and accurate hose insertion depth, and resulting in a relatively fixed position for the subsequently injection-molded hose clamp 30, ensuring stable connection quality.

[0033] The height of the stop portion 12 is 0.5 mm to 2 mm, so as to provide reliable axial limiting.

[0034] Please see Figure 3 and Figure 6 In Embodiments 1 and 4, an annular second groove 21 is formed on the outer periphery of the second connecting end 20, and the portion of the clamp 30 extending to the second connecting end 20 has a second positioning portion 32 accommodated within the second groove 21. The second groove 21 can be directly formed on the outer wall of the second connecting end 20 of the hose. Its shape can be similar to the first groove 11, such as rectangular, semi-circular, trapezoidal, etc. Alternatively, the second groove 21 can be formed by applying radial extrusion force to the hose during injection molding. Under the action of radial extrusion force, the hose deforms to generate an inwardly recessed second groove 21. The flowing injection molding material enters the second groove 21, and after cooling and solidification, forms the second positioning portion 32, thereby establishing a mechanical lock on the outside of the hose.

[0035] As needed, multiple second grooves 21 can be provided at intervals along the length of the second connecting end 20, such as 2 to 5, and the second positioning part 32 corresponds to the second groove 21 one by one. The depth of the second groove 21 is 20% to 50% of the tube wall thickness, for example, 0.3mm to 1.5mm, and the width is 2mm to 6mm. The size of the second groove 21 should not be too large to avoid excessively weakening the strength of the tube body.

[0036] Please see Figure 2 and Figure 3In Embodiment 1, the outer periphery of the first connecting end 10 is provided with an annular anti-detachment barb 13, which is located on the side of the first groove 11 adjacent to the end face of the first connecting end 10. The anti-detachment barb 13 is a raised structure with an inclined surface surrounding the outer periphery of the first connecting end 10. The side slope near the free end of the first connecting end 10 is relatively gentle (guide surface) to facilitate the insertion of the tubing; while the other side slope is relatively steep or even vertical (anti-retraction surface) to prevent the tubing from being pulled out.

[0037] The anti-loosening barb 13 is integrally injection molded with the automotive cooling water inlet connector. When the hose is inserted, its inner wall will elastically deform beyond the guide surface of the anti-loosening barb 13; after insertion, the hose material rebounds and gets stuck behind the anti-loosening barb 13, forming an additional anti-pull-out barrier.

[0038] The anti-detachment barb 13 has a height of 0.2mm to 1mm, a guide surface angle of 30° to 60°, and a recommended anti-reverse surface angle of 60° to 90°. Based on the tightening force provided by the injection-molded hose clamp 30, the anti-detachment barb 13 provides an independent, mechanical anti-pull-out protection between the hose and the automotive coolant inlet connector. Even in extreme cases (assuming complete failure of the hose clamp 30), the anti-detachment barb 13 effectively prevents the hose from easily detaching from the automotive coolant inlet connector, providing redundant safety design for the system and further reducing the risk of coolant leakage.

[0039] Please see Figure 5 In Embodiment 3, the outer periphery of the first connecting end 10 is provided with a plurality of annular protrusions 14 spaced apart along its own axial direction. A first groove 11 is formed between two adjacent protrusions 14, and the first positioning part 31 corresponds one-to-one with the first groove 11. The hose abuts against the protrusions 14 adjacent to the end face of the first connecting end 10. The protrusions 14 are annular ridges surrounding the outer periphery of the first connecting end 10. The valley area between adjacent protrusions 14 constitutes the first groove 11. The cross-sectional shape of the protrusions 14 can be rectangular, trapezoidal, or semi-circular. The number of protrusions 14 can be two or more, thereby forming a plurality of first grooves 11. The outermost protrusion 14 (near the free end) can also serve as a stop part 12 and abut against the end of the hose.

[0040] The bottom of the first groove 11 is rounded to reduce stress concentration at that location and prevent the pipe clamp 30 from cracking or brittle fracture at the root of the first positioning part 31 due to long-term vibration or temperature cycling, thereby improving the structural integrity of the pipe clamp 30 itself and the reliability of its long-term use.

[0041] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fastening structure for connecting and securing an automotive cooling water inlet connector and hose, characterized in that, include: The car cooling water inlet connector has a first connecting end (10), and the outer peripheral surface of the first connecting end (10) is provided with an annular first groove (11). A hose having a second connecting end (20) fitted around the outer periphery of the first connecting end (10) and spaced or aligned with the first groove (11); and The pipe clamp (30) is an injection molded part and is integrally formed on the outer periphery of the sleeve portion of the second connecting end (20). One end of the pipe clamp (30) has a first positioning part (31) that is accommodated in the first groove (11).

2. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, The first connecting end (10) has an annular stop portion (12) which is located on the side of the first groove (11) near the end face of the first connecting end (10). The second connecting end (20) abuts against the stop portion (12).

3. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, The outer periphery of the second connecting end (20) is provided with an annular second groove (21), and the portion of the pipe clamp (30) extending to the second connecting end (20) has a second positioning part (32) that is accommodated in the second groove (21).

4. The automotive cooling water inlet connector and hose connection fastening structure according to claim 3, characterized in that, The second groove (21) is provided in multiple spaces along the length direction of the second connecting end (20), and the second positioning part (32) corresponds to the second groove (21) one by one.

5. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, The outer periphery of the first connecting end (10) is provided with an annular anti-detachment barb (13), and the anti-detachment barb (13) is located on the side of the first groove (11) adjacent to the end face of the first connecting end (10).

6. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, The outer periphery of the first connecting end (10) is provided with a plurality of annular protrusions (14) spaced apart along its own axial direction. The first groove (11) is formed between two adjacent protrusions (14). The first positioning part (31) corresponds to the first groove (11) one by one. The rubber tube abuts against the protrusions (14) adjacent to the end face of the first connecting end (10).

7. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, The bottom of the first groove (11) is rounded.

8. The fastening structure for connecting the automotive cooling water inlet connector and the hose according to claim 1, characterized in that, Both the automotive cooling water inlet connector and the hose clamp (30) are made of nylon.

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