Automobile air conditioner pipeline double-sealing structure and machining method thereof

Abstract

The invention discloses an automobile air conditioner pipeline double-sealing structure and a machining method thereof. 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 between the inner surface of the stud and the core tube to form radial sealing; when the stud is connected with the nut in a matched mode, the blocking table on the core pipe is matched with 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 invention belongs to the technical field of automobile air conditioners, and in particular relates to a double sealing structure of an automobile air conditioner pipeline and a processing method thereof. Background Art

[0002] The air conditioning system is a very important system in modern cars. Leakage of 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] At present, most air-conditioning systems are sealed by radial sealing. Due to structural errors caused by subsequent processing, the pipes of the air-conditioning system are eccentric during the assembly process, resulting in leakage of the air-conditioning system, which affects the sealing of the air-conditioning. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a double sealing structure for automobile air-conditioning pipes and a processing method thereof, so as 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 object, the present invention provides the following technical solution: a double sealing structure for automobile air conditioning pipelines, comprising:

[0006] Core tube;

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

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

[0009] A nut is sleeved on the core tube, and a gap is provided 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 to be matched with the nut for connection;

[0011] An annular boss is arranged inside the stud, the core tube and the stud are interference fit to clamp the first sealing ring, and a stopper is arranged 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 a receiving groove for receiving 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] Further, 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 present application also discloses a method for processing a double sealing structure of an automobile air conditioning pipeline, comprising the following steps:

[0019] S01: placing the core tube to be processed at the center position of the rotating wheel bracket;

[0020] S02: The core tube to be processed is punched along its radial direction by rotating the rotating wheel on the rotating wheel bracket to form a receiving groove and a sealing groove for receiving the first sealing ring and the second sealing ring;

[0021] S03: placing the first sealing ring and the second sealing ring in the receiving groove and the sealing groove respectively, and connecting them by means of studs and nuts to form radial sealing for the first sealing ring and end face sealing for the second sealing ring.

[0022] Furthermore, in the step S02, the initial rotation speed of the rotating wheel is 4000-6000 r / min, and when the core tube to be processed reaches a preset condition, the rotation speed of the rotating wheel is reduced to 1000 r / min.

[0023] Furthermore, in step S02, the number of the rotating wheels is three, and the angle between two adjacent rotating wheels is 120°.

[0024] The beneficial effects of the present invention are as follows: compared with the prior art, a double sealing structure of an automobile air-conditioning pipeline in the present invention is achieved by sleeve-arranging a first sealing ring and a second sealing ring on a core tube, and the first sealing ring and the second sealing ring are spaced apart; the first sealing ring is clamped to form a radial seal by radial pressure generated by the interference fit between the inner surface of the stud and the core tube; when the stud is connected with the nut, the second sealing ring can be clamped to form an axial seal by the end face of the baffle on the core tube and the annular boss; by adopting a sealing structure combining axial sealing and radial sealing, 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.

[0025] 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 those skilled in the art may be taught 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

[0026] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0027] Figure 1 An exploded view of a double sealing structure for automobile air conditioning pipelines proposed in one embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a core tube according to an embodiment of the present invention;

[0029] Figure 3 The figure is a schematic structural diagram of a nut provided in one embodiment of the present invention.

[0030] Figure Number:

[0031] 1-core tube; 11-stop; 12-accommodating groove; 13-sealing groove;

[0032] 2- first sealing ring;

[0033] 3- second sealing ring;

[0034] 4- nut;

[0035] 5- stud; 51- through hole; 52- annular boss. DETAILED DESCRIPTION

[0036] like Figures 1 to 3As shown, this embodiment proposes a double sealing structure of an automobile air-conditioning pipeline and a processing method thereof, comprising a core tube 1, a first sealing ring 2, and a second sealing ring 3, wherein 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 greater 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, wherein the nut 4 is sleeved on the core tube 1, and a gap is provided between the core tube 1 and the nut 4, and 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 be matched with the nut 4 for connection, and an annular boss 52 is provided inside the stud 5, and the inner surfaces of the core tube 1 and the stud 5 are interference matched to clamp the first sealing ring 2, and a stopper 11 is provided on the core tube 1, and the stopper 11 cooperates with the end surface of the annular boss 52 to clamp the second sealing ring 3. The radial pressure generated by the interference fit between the inner surface of the stud 5 and 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 sealing ring of the air-conditioning system 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 conditioner due to structural eccentricity of the radial seal.

[0037] 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, thereby 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, thereby further improving the axial sealing effect of the second sealing ring 3.

[0038] For further information, see Figure 2 As shown, the core tube 1 is provided with a receiving groove 12, and the receiving groove 12 is provided so as to accommodate the first sealing ring 2. In this way, when the first sealing ring 2 is placed in the receiving groove 12, the annular boss 52 is interference-fitted with the core tube 1, so that the first sealing ring 2 is subjected to radial force, so that the first sealing ring 2 is better 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.

[0039] Preferably, the cross section of the receiving groove 12 is set in a U-shape, and by being set in a U-shape, 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 receiving groove 12. Of course, in this embodiment, according to actual conditions and specific needs, the cross section of the receiving groove 12 can also be set in a V-shape or other shapes, which is not the only limitation here.

[0040] For further information, see Figure 2 As shown, the core tube 1 is provided with a sealing groove 13, and the sealing groove 13 can be used to accommodate the second sealing ring 3. In this way, when the second sealing ring 3 is placed in the sealing groove 13, the annular boss 52 and the stopper 11 are abutted and matched, so that the second sealing ring 3 is well placed in the sealing groove 13 for axial sealing. At the same time, the engagement of the nut 4 and the stud 5 further enhances the clamping force of the annular boss 52 and the stopper 11, so that the second sealing ring 3 is well placed in the sealing groove 13, and the axial sealing effect is further enhanced.

[0041] For further information, see Figure 2 As shown, the stopper 11 is an annular stopper, and the outer diameter of the stopper 11 is greater than or equal to the outer diameter of the second sealing ring 3, and the outer diameter of the stopper 11 is smaller than the outer diameter of the through hole 51. In this way, 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 stopper 11 and extend into the gap between the core tube 1 and the nut 4 to engage with the nut 4; by making the outer diameter of the stopper 11 larger than the outer diameter of the second sealing ring 3, it is ensured that the stopper 11 and the second sealing ring 3 have a larger contact area, and the annular boss 52 and the stopper 11 cooperate to clamp the second sealing ring 3.

[0042] 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 and the second sealing ring 3 have a larger contact area, and can better cooperate with the stopper 11 to clamp the second sealing ring 3.

[0043] 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 fits the annular boss 52 as a whole, and a better axial seal is achieved.

[0044] In the present application, a method for processing a double sealing structure of an automobile air conditioning pipeline is also provided, comprising the following steps:

[0045] S01: placing the core tube to be processed at the center position of the rotating wheel bracket;

[0046] S02: The rotating wheel on the rotating wheel bracket is rotated to punch the core tube to be processed along its radial direction to form a receiving groove 12 and a sealing groove 13 for receiving the first sealing ring and the second sealing ring;

[0047] S03: Place the first sealing ring 2 and the second sealing ring 3 in the accommodating groove 12 and the sealing groove 13 respectively, and connect them through the stud 5 and the nut 4 to form a radial seal for the first sealing ring 2 and an end face seal for the second sealing ring 3.

[0048] In the present application, the core tube to be processed is placed at the center position of the rotating wheel, and the rotating wheel on the rotating wheel bracket is rotated. The rotating wheel will revolve around the center of the product and the rotating wheel itself will also rotate. The rotating wheel is driven by a servo motor to shrink toward the center direction of the core tube, that is, it is stamped along the radial direction of the core tube to be processed to form a receiving groove 12 and a sealing groove 13 for accommodating the first sealing ring 2 and the second sealing ring 3; then the first sealing ring 2 and the second sealing ring 3 are placed in the receiving groove 12 and the sealing groove 13 respectively, and connected by the stud 5 and the nut 4 to form a radial seal for the first sealing ring 2 and an end face seal for the second sealing ring 3.

[0049] Preferably, in step S02, the initial speed of the rotating wheel is 4000-6000r / min, and when the core tube to be processed is processed to the preset condition, the speed of the rotating wheel is reduced to 1000r / min. By setting the initial speed of the rotating wheel to be relatively high, when the rotating wheel contacts the core tube to be processed, the core tube to be processed is spin-formed under the action of the revolution and rotation of the rotating wheel, thereby improving the forming efficiency; when the core tube to be processed is processed to the preset condition, the speed of the rotating wheel is controlled at 1000r / min, and the core tube to be processed is polished by the rotating wheel with a relatively low speed, so that the surfaces of the formed accommodating groove 2 and the sealing groove 3 are smooth, which is conducive to assembling the first sealing ring 2 and the second sealing ring 3, and the end face seal and radial seal are formed by the first sealing ring 2 and the second sealing ring 3. The two sealing modes complement each other, and the formed sealing structure has a good sealing effect, which effectively prevents the air conditioner seal from leaking.

[0050] Preferably, the number of the rotating wheels is three, and the angle between two adjacent rotating wheels is 120°. In this way, by setting three rotating wheels and making the angles between two adjacent rotating wheels equal, when the rotating wheels are rotating and spinning, the eccentric force that affects the spinning effect due to asymmetric positions is avoided. Of course, in this embodiment, according to actual conditions and specific needs, the number of the rotating wheels can also be set to four, five, or other multiples, which is not limited here.

[0051] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 pipeline, characterized in that: include: Core tube; A first sealing ring, sleeved on the core tube; A second sealing ring, sleeved on the core tube and spaced apart from the first sealing ring, wherein the outer diameter of the second sealing ring is greater than the outer diameter of the first sealing ring; A nut is sleeved on the core tube, and a gap is provided 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 to be matched with the nut for connection; An annular boss is arranged inside the stud, the core tube and the stud are interference fit to clamp the first sealing ring, and a stopper is arranged on the core tube to cooperate with the end face of the annular boss to clamp the second sealing ring.

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

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

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

5. The automobile air conditioning pipeline double sealing structure according to claim 4 is 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.

8. A method for processing a double sealing structure of an automobile air conditioning pipeline according to any one of claims 1 to 7, characterized in that: The steps include: S01: placing the core tube to be processed at the center position of the rotating wheel bracket; S02: The core tube to be processed is punched along its radial direction by rotating the rotating wheel on the rotating wheel bracket to form a receiving groove and a sealing groove for receiving the first sealing ring and the second sealing ring; S03: placing the first sealing ring and the second sealing ring in the receiving groove and the sealing groove respectively, and connecting them by means of studs and nuts to form radial sealing for the first sealing ring and end face sealing for the second sealing ring.

9. The method for processing a double sealing structure of an automobile air conditioning pipeline according to claim 8, characterized in that: In the step S02, the initial rotation speed of the rotating wheel is 4000-6000 r / min. When the core tube to be processed reaches a preset condition, the rotation speed of the rotating wheel is reduced to 1000 r / min.

10. The method for processing a double sealing structure of an automobile air conditioning pipeline according to claim 8, characterized in that: In step S02, the number of the rotating wheels is three, and the angle between two adjacent rotating wheels is 120°.

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