Double-sealing structure of automobile air conditioner pipeline

Abstract

The utility model discloses a double-sealing structure of an automobile air conditioner pipeline. The double-sealing structure of the automobile air conditioner pipeline comprises a core pipe, a first sealing ring, a second sealing ring, a nut and a stud, the first sealing ring and the second sealing ring are arranged on the core pipe in a sleeved mode and distributed in a spaced mode, the core pipe is sleeved with the nut, the stud is used for being connected with the nut, a gap is formed between the core pipe and the nut, and the stud can stretch into the gap and is connected with the nut in a matched mode. An annular boss is arranged in the stud, the core tube is in interference fit with the annular boss, and a blocking table is further arranged on the core tube. The first sealing ring is clamped by radial pressure generated by interference fit of the stud and the core tube to form radial sealing; when the stud and the nut are connected in a matched mode, the blocking table on the core pipe is matched with the end face of the annular boss to clamp the second sealing ring to form axial sealing, and the sealing structure combining the axial sealing and the radial sealing is adopted, so that the problem of leakage of an air conditioner caused by eccentric structure of the radial sealing is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile air conditioners, and in particular relates to a double-sealing structure for automobile air conditioner pipelines. Background Art

[0002] The air conditioning system is a very important system in modern cars. Leakage in the air conditioning system directly affects the cooling effect of the air conditioning and pollutes the atmospheric environment. Therefore, the sealing of the air conditioning system becomes very important. Whether the sealing of the air conditioning system is reliable directly affects the comfort of the passengers and environmental protection.

[0003] Currently, most air conditioning systems are sealed using radial sealing. However, due to structural errors caused by subsequent processing, the pipes of the air conditioning system are eccentric during the assembly process, resulting in leakage in the air conditioning system and affecting the sealing of the air conditioner. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a double sealing structure for automobile air-conditioning pipes to solve the technical problem that the current air-conditioning pipes are assembled eccentrically due to structural errors, thereby affecting the air-conditioning sealing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-sealed structure for automobile air-conditioning pipes, comprising:

[0006] core tube;

[0007] A first sealing ring is sleeved on the core tube;

[0008] a second sealing ring, sleeved on the core tube and spaced apart from the first sealing ring, the outer diameter of the second sealing ring being greater than the outer diameter of the first sealing ring;

[0009] A nut is sleeved on the core tube, with a gap between the core tube and the nut;

[0010] A stud having a through hole for the core tube to extend into, and the stud can extend into the gap and be matched with the nut for connection;

[0011] An annular boss is provided in the stud, the core tube is interference-fitted with the annular boss to clamp the first sealing ring, and a stopper is provided on the core tube to cooperate with the end face of the annular boss to clamp the second sealing ring.

[0012] Furthermore, the core tube is provided with an accommodating groove for accommodating the first sealing ring.

[0013] Furthermore, the cross section of the accommodating groove is U-shaped.

[0014] Furthermore, the core tube is provided with a sealing groove for accommodating the second sealing ring.

[0015] Furthermore, the baffle is an annular baffle, the outer diameter of the baffle is greater than or equal to the outer diameter of the second sealing ring, and the outer diameter of the baffle is smaller than the outer diameter of the through hole.

[0016] Furthermore, the outer diameter of the annular boss is greater than or equal to the outer diameter of the second sealing ring.

[0017] Furthermore, along the radial direction of the annular boss, the thickness of the annular boss is greater than the thickness of the second sealing ring.

[0018] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention provides a double-sealing structure for an automobile air-conditioning pipeline, in which a first sealing ring and a second sealing ring are sleeved on a core tube, and the first sealing ring and the second sealing ring are spaced apart; the first sealing ring is clamped by radial pressure generated by the interference fit between the inner surface of the stud and the core tube to form a radial seal; when the stud is connected with the nut, the second sealing ring can be clamped by the end face of the baffle on the core tube and the annular boss to form an axial seal. By adopting a sealing structure that combines axial and radial seals, it can be better ensured that the sealing ring of the air-conditioning system will not fail due to improper assembly during the assembly process, thereby improving the double insurance effect of the sealing ring, and improving the reliability and effectiveness of production assembly to a greater extent, and effectively solving the problem of leakage of the air-conditioning due to structural eccentricity of the radial seal.

[0019] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0021] Figure 1 This is an exploded view of a double-sealing structure for automobile air-conditioning pipes proposed in one embodiment of the utility model;

[0022] Figure 2 A schematic structural diagram of a core tube proposed in one embodiment of the present invention;

[0023] Figure 3 This is a structural schematic diagram of a nut proposed in one embodiment of the present utility model.

[0024] Figure Number:

[0025] 1-core tube; 11-stop; 12-accommodation groove; 13-sealing groove;

[0026] 2-first sealing ring;

[0027] 3- second sealing ring;

[0028] 4- nut;

[0029] 5- stud; 51- through hole; 52- annular boss. DETAILED DESCRIPTION

[0030] like Figures 1 to 3 As shown, this embodiment proposes a double sealing structure for an automobile air-conditioning pipeline, comprising a core tube 1, a first sealing ring 2, and a second sealing ring 3. The first sealing ring 2 and the second sealing ring 3 are sleeved on the core tube 1, the first sealing ring 2 and the second sealing ring 3 are spaced apart, and the outer diameter of the second sealing ring 3 is larger than the outer diameter of the first sealing ring 2. In addition, the double sealing structure also includes a nut 4 and a stud 5. The nut 4 is sleeved on the core tube 1, and a gap is provided between the core tube 1 and the nut 4. The stud 5 has a through hole 51 for the core tube 1 to extend into, and the stud 5 can extend into the gap and cooperate with the nut 4 to be connected. In addition, an annular boss 52 is provided in the stud 5, and the core tube 1 and the annular boss 52 are interference fit to clamp the first sealing ring 2. A stopper 11 is provided on the core tube 1, and the stopper 11 cooperates with the end face of the annular boss 52 to clamp the second sealing ring 3. The radial pressure generated by the interference fit between the stud 5 and the inner surface of the core tube 1 clamps the first sealing ring 2 to form a radial seal; when the stud 5 is connected with the nut 4, the second sealing ring 3 can be clamped by the end face of the baffle 11 on the core tube 1 and the annular boss 52 to form an axial seal. By adopting a sealing structure that combines axial and radial seals, it can better ensure that the air-conditioning system sealing ring will not fail due to improper assembly during the assembly process, improve the double insurance effect of the sealing ring, and improve the reliability and effectiveness of production assembly to a greater extent, and effectively solve the problem of leakage of the air-conditioning due to structural eccentricity of the radial seal.

[0031] In the present application, radial extrusion of the first sealing ring 2 is achieved by interference fit between the core tube 1 and the inner surface of the stud 5, and radial extrusion of the first sealing ring 2 is further achieved by threaded engagement between the nut 4 and the stud 5, so that the first sealing ring 2 is subjected to double extrusion, further improving the radial sealing effect of the first sealing ring 2; at the same time, the threaded engagement between the nut 4 and the stud 5 can enhance the axial force of the annular boss 52 against the second sealing ring 3, so that the end face of the annular boss 52 and the stop 11 can better clamp the second sealing ring 3, further improving the axial sealing effect of the second sealing ring 3.

[0032] Further, see Figure 2As shown, the core tube 1 is provided with a receiving groove 12, which can be used to accommodate the first sealing ring 2. In this way, when the first sealing ring 2 is placed in the receiving groove 12, the inner surface of the stud 5 and the core tube 1 have an interference fit, so that the first sealing ring 2 is subjected to a radial force, so that the first sealing ring 2 is well placed in the receiving groove 12 for radial sealing. At the same time, through the engagement of the nut 4 and the stud 5, the double radial force and the cooperation of the receiving groove 12 further enhance the radial sealing effect.

[0033] Preferably, the cross section of the accommodating groove 12 is U-shaped. By being U-shaped, it can better adapt to the shape of the first sealing ring 2, so that the first sealing ring 2 can be better placed in the accommodating groove 12. Of course, in this embodiment, according to actual conditions and specific needs, the cross section of the accommodating groove 12 can also be V-shaped or other shapes, which is not limited here.

[0034] Further, see Figure 2 As shown, the core tube 1 is provided with a sealing groove 13, which can be used to accommodate the second sealing ring 3. Thus, when the second sealing ring 3 is placed in the sealing groove 13, the annular boss 52 and the stopper 11 abut and cooperate, so that the second sealing ring 3 is well placed in the sealing groove 13 for axial sealing. At the same time, the engagement between the nut 4 and the stud 5 further strengthens the clamping force between the annular boss 52 and the stopper 11, so that the second sealing ring 3 is well placed in the sealing groove 13, further enhancing the axial sealing effect.

[0035] Further, see Figure 2 As shown, the retaining platform 11 is an annular retaining platform, and its outer diameter is greater than or equal to the outer diameter of the second sealing ring 3, and smaller than the outer diameter of the through hole 51. Thus, the outer diameter of the through hole 51 is smaller than the outer diameter of the through hole 51, so that the stud 5 can pass through the retaining platform 11 and extend into the gap between the core tube 1 and the nut 4, engaging with the nut 4. By making the outer diameter of the retaining platform 11 larger than the outer diameter of the second sealing ring 3, a larger contact area between the retaining platform 11 and the second sealing ring 3 is ensured, effectively ensuring that the annular boss 52 and the retaining platform 11 cooperate to clamp the second sealing ring 3.

[0036] Preferably, the outer diameter of the annular boss 52 is greater than or equal to the outer diameter of the second sealing ring 3. In this way, the annular boss 52 is ensured to have a larger contact area with the second sealing ring 3, and can better cooperate with the stopper 11 to clamp the second sealing ring 3.

[0037] Preferably, along the radial direction of the annular boss 52, the thickness of the annular boss 52 is greater than the thickness of the second sealing ring 3. In this way, it can be ensured that the second sealing ring 3 is entirely fitted with the annular boss 52, achieving better axial sealing.

[0038] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A double sealing structure for automobile air conditioning pipelines, characterized in that: include: core tube; A first sealing ring is sleeved on the core tube; a second sealing ring, sleeved on the core tube and spaced apart from the first sealing ring, the outer diameter of the second sealing ring being greater than the outer diameter of the first sealing ring; A nut is sleeved on the core tube, with a gap between the core tube and the nut; A stud having a through hole for the core tube to extend into, and the stud can extend into the gap and be matched with the nut for connection; An annular boss is provided in the stud, the core tube and the stud are interference-fitted to clamp the first sealing ring, and a stopper is provided on the core tube to cooperate with the end face of the annular boss to clamp the second sealing ring.

2. The double sealing structure of automobile air conditioning pipeline according to claim 1, characterized in that: The core tube is provided with an accommodating groove for accommodating the first sealing ring.

3. The double sealing structure of automobile air conditioning pipeline according to claim 2, characterized in that: The cross section of the accommodating groove is U-shaped.

4. The double sealing structure of automobile air conditioning pipeline according to claim 1, characterized in that: The core tube is provided with a sealing groove for accommodating the second sealing ring.

5. The double sealing structure of automobile air conditioning pipeline according to claim 4, characterized in that: The baffle is an annular baffle, the outer diameter of which is greater than or equal to the outer diameter of the second sealing ring, and the outer diameter of which is smaller than the outer diameter of the through hole.

6. The automobile air conditioning pipeline double sealing structure according to claim 5, characterized in that: The outer diameter of the annular boss is greater than or equal to the outer diameter of the second sealing ring.

7. The automobile air conditioning pipeline double sealing structure according to claim 1, characterized in that: Along the radial direction of the annular boss, the thickness of the annular boss is greater than the thickness of the second sealing ring.

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