Automobile air conditioner pipeline pressing plate connecting device

Abstract

The utility model discloses an automobile air conditioner pipeline pressing plate connecting device, and belongs to the technical field of automobile air conditioner assembling. The pressure plate comprises a pressure plate main body, a valve core is arranged in the pressure plate main body, and one end of the pressure plate main body is connected with a first sleeve; a containing hole is formed in the first sleeve, and an elastic piece is arranged in an inner cavity of the first sleeve; the first sleeve is slidably sleeved with a second sleeve, and the inner wall of the second sleeve is provided with a limiting protruding ring used for limiting the steel balls in the containing holes. And the elastic piece axially extrudes from one side of the reducing section of the metal pipe, and the steel ball is used for stopping and limiting from the other side of the reducing section, so that the metal pipe is locked. According to the utility model, the metal pipe and the road pressure plate can be assembled in a clamping manner without other tools, so that not only is the operation convenient and fast, but also the requirement on space is lower.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air conditioning assembly technology, and more specifically, relates to an automotive air conditioning pipe pressure plate connection device. Background Technology

[0002] In the intricate structure of an automotive air conditioning system, the air conditioning pipe pressure plate undoubtedly occupies a crucial position, serving as a key component for the normal operation of the entire system. One end of the air conditioning pipe pressure plate is tightly connected to a metal pipe (usually aluminum, due to its excellent thermal conductivity and corrosion resistance, which efficiently transfers refrigerant temperature, ensuring stable and reliable cooling performance of the air conditioning system), while the other end connects to core components such as the expansion valve and compressor. This creates an unobstructed refrigerant circulation channel, ensuring the stable and efficient flow of refrigerant within the system, thereby achieving the purpose of cooling the air inside the vehicle.

[0003] Traditional air conditioning pipe connections between pressure plates and metal pipes typically employ welding or bolting. Welding is a complex and cumbersome process, requiring ample operating space. While bolting is more convenient, it still requires tools, making it inconvenient in confined spaces. Therefore, designing a pressure plate connection device that allows for quick connection to metal pipes and is suitable for operation in confined spaces is of significant practical importance in production.

[0004] A search revealed that patent CN219755643U discloses a pressure plate connection structure for automotive air conditioning pipes. This application utilizes the easily moldable and resilient properties of elastic materials to create a quick-connect fitting, which is easy to install without tools. The pressure plate body features a hollowed-out connector design, effectively utilizing space. The overall structure is compact, saves materials, and facilitates installation.

[0005] For example, patent CN219154191U discloses a pressure plate structure for automotive air conditioning pipes. In this application, within the confined space of an automotive air conditioning installation, a radial pressure plate is pressed onto the condenser inlet pressure plate using a flexible, clamping connector. This direct-insertion installation eliminates the need for bolt tightening, making operation convenient and labor-saving, while also preventing refrigerant leakage caused by stripped bolt threads.

[0006] The aforementioned applications all involve technical improvements to the pressure plate connection structure of automotive air conditioning pipes, but none of them provide an effective solution for the quick connection between the pressure plate and the aluminum pipe. Utility Model Content

[0007] 1. The problem to be solved

[0008] In view of at least some of the problems existing in the prior art, this utility model proposes an automotive air conditioning pipe pressure plate connection device, the purpose of which is to solve the problem that the existing automotive air conditioning pipe pressure plate connection structure is time-consuming and labor-intensive when connecting with metal pipes, and has high requirements for working space.

[0009] 2. Technical Solution

[0010] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0011] This utility model provides an automotive air conditioning pipe pressure plate connection device, which includes a pressure plate body, a valve core inside the pressure plate body, and a first sleeve connected to one end of the pressure plate body.

[0012] The first sleeve is provided with a receiving hole, and the inner cavity of the first sleeve is provided with an elastic element;

[0013] The first sleeve is slidably fitted with a second sleeve, and the inner wall of the second sleeve is provided with a limiting protrusion ring for limiting the steel ball in the receiving hole.

[0014] The elastic element is axially compressed from one side of the diameter-changing section of the metal tube, while the steel ball stops and limits the movement from the other side of the diameter-changing section, thus locking the metal tube.

[0015] Furthermore, the receiving hole is a conical hole in whole, and the diameter of the large hole section of the conical hole is larger than the diameter of the steel ball, while the diameter of the small hole section is smaller than the diameter of the steel ball.

[0016] Furthermore, the sidewall of the limiting protrusion ring is an inclined transition surface.

[0017] Furthermore, the receiving holes are distributed in a ring shape along the outer wall of the first sleeve.

[0018] Furthermore, a sealing body is provided in the inner cavity of the first sleeve, and the elastic element is limited between the sealing body and the valve core.

[0019] Furthermore, a filter plate is provided at the end of the sealing body away from the elastic element, and the filter plate is made of an elastic material.

[0020] Furthermore, the elastic element is a spring, one end of which is sleeved on the limiting boss of the sealing body; the other end is located in the groove opened at the end of the pressure plate body.

[0021] Furthermore, sealing rings are provided between the sealing body and the first sleeve, and between the valve core and the pressure plate body.

[0022] Furthermore, the end of the first sleeve furthest from the receiving hole is fitted onto the end of the pressure plate body, and a stop ring is provided between the two.

[0023] Furthermore, the filter plate is made of rubber, silicone, or polyester fiber.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] (1) The automotive air conditioning pipe pressure plate connection device of this utility model, during assembly, first inserts the variable diameter section of the metal pipe into the first sleeve, and then slides the second sleeve so that the limiting protrusion is above the receiving hole and limits the movement of the steel ball; at the same time, the elastic element axially presses from one side of the variable diameter section of the metal pipe; at this time, since the steel ball stops and limits from the other side of the variable diameter section, the metal pipe can be locked. Compared with traditional welding or bolt connection, the pressure plate connection device of this utility model can complete the installation of the metal pipe without the aid of other tools, which is not only convenient and quick to operate, but also requires less space.

[0027] (2) The automotive air conditioning pipe pressure plate connection device of this utility model has a side wall of the limiting protrusion ring that is inclined to a transition surface, so that the limiting protrusion ring can move more smoothly and prevent jamming; at the same time, the receiving hole is designed as a conical hole to effectively prevent the steel ball from falling off.

[0028] (3) The automotive air conditioning pipe pressure plate connection device of this utility model can effectively ensure the sealing performance of the refrigerant flow channel by setting the sealing body, and prevent the refrigerant from leaking out. At the same time, a filter plate is provided at the end of the sealing body, which can filter impurities in the refrigerant to ensure the cooling effect. On the other hand, it can prevent hard contact between the metal pipe and the sealing body, which would cause damage. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an automotive air conditioning pipe pressure plate connection device according to the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of an automotive air conditioning pipe pressure plate connection device according to the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the first sleeve in this utility model;

[0032] Figure 4 This is a schematic diagram of the outer sleeve structure in this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the metal tube in this utility model.

[0034] In the diagram: 1. Pressure plate body; 11. Valve core; 12. Assembly hole; 2. Steel ball; 3. First sleeve; 31. Receiving hole; 4. Second sleeve; 41. Limiting protrusion ring; 42. Transition surface; 5. Elastic element; 6. Sealing body; 61. Filter plate; 7. Sealing ring; 8. Stop ring; 9. Metal pipe; 91. Variable diameter section; 92. Pipe body. Detailed Implementation

[0035] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] The present invention will be further described below with reference to specific embodiments.

[0038] like Figure 1 As shown in Figure 2, an automotive air conditioning pipe pressure plate connection device of this embodiment includes a pressure plate body 1, a first sleeve 3, and a second sleeve 4, which are sequentially sleeved together. One end of the pressure plate body 1 is provided with a connector, and the other end is sleeved with the first sleeve 3. Meanwhile, a valve core 11 is provided inside the pressure plate body 1.

[0039] The first sleeve 3 is also provided with a receiving hole 31 for placing the steel ball 2; at the same time, an elastic element 5 is provided in the inner cavity of the first sleeve 3. The second sleeve 4 is slidably disposed at the end of the first sleeve 3 away from the pressure plate body 1; at the same time, a limiting protrusion ring 41 is provided on the inner wall of the second sleeve 4, and the limiting protrusion ring 41 can be driven to limit and release the steel ball 2 in the receiving hole 31 by the sliding of the second sleeve 4.

[0040] In this specific embodiment, the elastic element 5 can be a spring. Meanwhile, a stop ring 8 is provided between the first sleeve 3 and the pressure plate body 1 to ensure the firmness of the connection between them. In addition, to facilitate the connection between the pressure plate body 1 and the matching parts, assembly holes 12 are also machined on the pressure plate body 1.

[0041] The metal pipe 9 to be installed is preferably an aluminum pipe, because it has good thermal conductivity and corrosion resistance, and can efficiently transfer the temperature of the refrigerant, ensuring the stable and reliable cooling performance of the air conditioning system. Figure 5As shown, the metal pipe 9 includes an interconnected pipe body 92 and a reducing section 91. The pipe body 92 is generally cylindrical. The reducing section 91 is generally an annular structure with a larger diameter in the middle and smaller diameters at both ends. For ease of description below, the maximum diameter in the middle of the reducing section 91 is used as the dividing line; the tapering section at the ends is defined as the front end, and the tapering section connected to the pipe body is defined as the rear end.

[0042] During assembly, the end of the metal tube 9 with the variable diameter section 91 is first inserted into the first sleeve 3; at this time, the limiting protrusion 41 in the second sleeve 4 is misaligned with the receiving hole 31 on the first sleeve 3, and the front end of the variable diameter section 91 can lift the steel ball 2 in the receiving hole 31 and continue to extend into the first sleeve 3.

[0043] As the metal tube 9 continues to penetrate deeper, the first sleeve 3 begins to compress the elastic element 5; at the same time, the maximum diameter of the variable diameter section 91 passes the steel ball 2; at this point, the rear end of the variable diameter section 91, and even the pipe body 92, moves to the position of the steel ball 2.

[0044] Next, the second sleeve 4 is slid, causing the limiting protrusion 41 to slide to the position of the receiving hole 31, and pressing the steel ball 2 so that the steel ball 2 can fit tightly against the outer peripheral wall of the metal tube 9; then, it is released, and the elastic element 5 is axially pressed from one side of the reducing section 91, while the steel ball 2 is stopped and limited from the other side of the reducing section 91, thus locking the metal tube 9. Compared with traditional welding or bolt connections, the pressure plate connection device of this embodiment adopts a snap-fit ​​assembly method, which can complete the installation of the metal tube 9 without the aid of other tools. It is not only convenient and quick to operate, but also requires less space.

[0045] Specifically, such as Figure 3 As shown, in this embodiment, multiple receiving holes 31 are distributed in a ring along the outer wall of the first sleeve 3, allowing multiple limiting points to be formed on the outer wall of the metal tube 9, which helps ensure the stability of the metal tube 9 when locked. Simultaneously, the receiving hole 31 is a conical hole, with the larger diameter of the larger section being larger than the diameter of the steel ball 2 and the smaller diameter of the smaller section being smaller than the diameter of the steel ball 2, effectively preventing the steel ball 2 from falling out of the bottom of the receiving hole 31. Furthermore, a limiting space can be formed between the top of the receiving hole 31 and the inner wall of the second sleeve 4 to prevent the steel ball 2 from falling out of the top of the receiving hole 31.

[0046] It should be noted that the top of the receiving hole 31 refers to the opening located on the outer wall of the first sleeve 3; while the bottom of the receiving hole 31 refers to the opening located on the inner wall of the first sleeve 3. Meanwhile, to prevent the second sleeve 4 from sliding off the first sleeve 3, a limiting element can be provided between them. For example, the first sleeve 3 and the second sleeve 4 can be fitted with a stepped joint, and a limiting ring can be provided near the end of the first sleeve 3; or other structures as described in the prior art can be formed, which are not specifically limited here.

[0047] like Figure 4 As shown, the sidewall of the limiting protrusion 41 is an inclined transition surface 42, which is the connecting section between the inner wall of the second sleeve 4 and the top of the limiting protrusion 41. The setting of this transition surface 42 makes the sliding of the limiting protrusion 41 smoother, preventing jamming with the steel ball 2 and thus affecting the normal use of the device.

[0048] like Figure 2 As shown, in some embodiments, a sealing body 6 is slidably disposed in the inner cavity of the first sleeve 3. A sealing ring 7, such as an O-ring, can be provided between the sealing body 6 and the inner wall of the first sleeve 3, and between the valve core 11 and the pressure plate body 1. The inner cavity of the sealing body 6, the inner cavity of the first sleeve 3, and the inner cavity of the valve core 11 form a sealed channel for refrigerant flow, which can effectively prevent refrigerant leakage.

[0049] Simultaneously, the spring is confined between the sealing body 6 and the valve core 11. As a more specific confining method, a boss can be provided at the end of the sealing body 6; a slot can be opened at the end of the pressure plate body 1. In this way, one end of the spring is fitted onto the confining boss of the sealing body 6; the other end is located within the slot opened at the end of the pressure plate body 1, thus forming a confining position. Of course, other confining methods are also possible. For example, the pressure plate body 1 may have a boss, and the sealing body 6 may have a slot; or both may have slots; or both may have bosses.

[0050] In some embodiments, a filter plate 61 is provided at the end of the sealing body 6 away from the elastic member 5. Preferably, the filter plate 61 is made of an elastic material, such as rubber, silicone, or polyester fiber. By providing the filter plate 61, impurities in the refrigerant can be filtered to ensure the cooling effect; on the other hand, it can prevent hard contact between the metal tube 9 and the sealing body 6, which could cause damage.

[0051] Meanwhile, in order to facilitate the replacement of the filter plate 61, an installation slot is opened at the end of the sealing body 6 away from the pressure plate body 1, and the filter plate 61 can be locked in the installation slot.

[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pressure plate connection device for automotive air conditioning pipes, comprising a pressure plate body (1), wherein a valve core (11) is provided inside the pressure plate body (1), characterized in that: One end of the pressure plate body (1) is connected to the first sleeve (3); The first sleeve (3) is provided with a receiving hole (31), and the inner cavity of the first sleeve (3) is provided with an elastic element (5). The first sleeve (3) is slidably fitted with a second sleeve (4), and the inner wall of the second sleeve (4) is provided with a limiting protrusion (41) for limiting the steel ball (2) in the receiving hole (31). The elastic element (5) is axially squeezed from one side of the variable diameter section (91) of the metal tube (9), and the steel ball (2) stops and limits from the other side of the variable diameter section (91), thus locking the metal tube (9).

2. The automotive air conditioning pipe pressure plate connection device according to claim 1, characterized in that: The receiving hole (31) is a conical hole in whole, and the diameter of the large hole section of the conical hole is larger than the diameter of the steel ball (2), while the diameter of the small hole section is smaller than the diameter of the steel ball (2).

3. The automotive air conditioning pipe pressure plate connection device according to claim 2, characterized in that: The sidewall of the limiting protrusion (41) is a transition surface (42) that is inclined.

4. The automotive air conditioning pipe pressure plate connection device according to claim 3, characterized in that: The receiving holes (31) are distributed in a ring shape along the outer wall of the first sleeve (3).

5. A car air conditioning pipe pressure plate connection device according to any one of claims 1-4, characterized in that: The inner cavity of the first sleeve (3) is provided with a sealing body (6), and the elastic element (5) is limited between the sealing body (6) and the valve core (11).

6. The automotive air conditioning pipe pressure plate connection device according to claim 5, characterized in that: The sealing body (6) has a filter plate (61) at the end away from the elastic member (5), and the filter plate (61) is made of elastic material.

7. The automotive air conditioning pipe pressure plate connection device according to claim 5, characterized in that: The elastic element (5) is a spring, one end of which is sleeved on the limiting boss of the sealing body (6); the other end is located in the slot opened at the end of the pressure plate body (1).

8. The automotive air conditioning pipe pressure plate connection device according to claim 5, characterized in that: A sealing ring (7) is provided between the sealing body (6) and the first sleeve (3), and between the valve core (11) and the pressure plate body (1).

9. The automotive air conditioning pipe pressure plate connection device according to claim 1, characterized in that: The end of the first sleeve (3) away from the receiving hole (31) is sleeved on the end of the pressure plate body (1), and a stop ring (8) is provided between the two.

10. The automotive air conditioning pipe pressure plate connection device according to claim 6, characterized in that: The filter plate (61) is made of rubber, silicone or polyester fiber.

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