Sealed spiral groove lower cylinder cover of automobile air conditioner compressor

Abstract

The utility model relates to the technical field of automobile air conditioner compressor, disclose a kind of automobile air conditioner compressor sealing spiral groove lower cylinder cover, including steel cover and axle end, steel cover middle upper outer wall is fixedly connected with cover end, the axle end outer wall is arranged in cover end upper inside, multiple hole grooves are set in the steel cover upper outer wall, the fixed shaft is fixedly connected in the steel cover bottom end outer wall, the axle end lower outer wall is fixedly connected with crankshaft, the crankshaft outer wall is arranged in fixed shaft inside, passageway is set in the axle end middle. In the utility model, by the cooperation of axle end inner and outer oil groove, crankshaft left-hand spiral groove and disconnected oil groove, uniform lubrication and oil circuit sealing are realized, and low-pressure area oil supply is ensured;With the aid of sliding cover, spring and other collaborative structures and positioning groove design, crankshaft quick disassembly and accurate assembly are achieved, which reduces component wear, improves assembly efficiency and operational stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning compressor technology, and in particular to a sealed spiral groove lower cylinder head for an automotive air conditioning compressor. Background Technology

[0002] As the core power component of an automotive air conditioning system, the operating efficiency, stability, and service life of the automotive air conditioning compressor directly affect the cooling performance and energy consumption of the entire vehicle's air conditioning system. Against the backdrop of rapid development in the automotive industry, the requirements for compressor miniaturization, high efficiency, and reliability are increasing. Among these, high- and low-pressure rotary compressors are widely used in the air conditioning systems of various vehicle models due to their compact structure and strong adaptability to different power requirements.

[0003] In high- and low-pressure rotary compressors, the lower cylinder head not only supports and guides the crankshaft end, but its assembly precision with the crankshaft and steel cover, as well as the ease of assembly and disassembly, directly affect the compressor's assembly efficiency and subsequent maintenance convenience. In existing technologies, the connection between the lower cylinder head and crankshaft is mostly achieved through bolt fixing or interference fits. Assembly requires specialized tools to ensure coaxiality, and disassembly is cumbersome, requiring the loosening of fasteners one by one to separate the components, increasing the difficulty and time-consuming nature of maintenance. Furthermore, traditional assembly structures lack precise positioning and guiding designs. Under high and low pressure differential operating environments, assembly deviations can easily lead to abnormal clearances between the crankshaft and the lower cylinder head's inner bore. This not only accelerates component wear but may also affect the stability of lubrication oil supply, further impacting the compressor's operational reliability. Therefore, it is urgent to optimize the lower cylinder head's assembly structure, balancing connection stability with ease of disassembly and assembly.

[0004] In response to this technical problem, this application proposes a sealed spiral groove lower cylinder head for automotive air conditioning compressors. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a sealed spiral groove lower cylinder head for automotive air conditioning compressors. Through the cooperation of the inner and outer oil grooves at the shaft end, the left-hand spiral groove of the crankshaft and the disconnected oil groove, uniform lubrication and oil circuit sealing are achieved, ensuring oil supply in the low-pressure area. With the help of the sliding cover, spring and other collaborative structures and positioning groove design, the crankshaft can be quickly disassembled and assembled and accurately assembled, which reduces component wear and improves assembly efficiency and operational stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sealed spiral groove lower cylinder head for an automotive air conditioning compressor includes a steel cover and a shaft end. The upper outer wall of the steel cover is fixedly connected to a cover end, and the outer wall of the shaft end is disposed inside the upper side of the cover end. The upper outer wall of the steel cover has multiple holes and grooves. The bottom outer wall of the steel cover is fixedly connected to a fixed shaft, and the lower outer wall of the shaft end is fixedly connected to a crankshaft. The outer wall of the crankshaft is disposed inside the fixed shaft, and a channel is provided in the middle of the shaft end.

[0008] Furthermore, the upper inner wall of the shaft end is provided with a plurality of first oil grooves, and the upper outer wall of the shaft end is provided with a plurality of second oil grooves.

[0009] Furthermore, a sliding cover is slidably connected to the outer wall of the fixed shaft, and a crankshaft is fixedly connected to the lower outer wall of the fixed shaft.

[0010] Furthermore, a hole is provided inside the lower side of the fixed shaft, and multiple movable balls are arranged inside the hole.

[0011] Furthermore, a limiting groove is formed on the outer wall of the crankshaft in the middle to accommodate multiple movable balls.

[0012] Furthermore, a spring is sleeved on the lower outer wall of the fixed shaft, and the outer wall of the spring is disposed on the upper side of the outer wall of the fixed ring.

[0013] Furthermore, a positioning groove is provided on the outer wall of the left side of the crankshaft for positioning inside the lower side of the steel cover.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this invention, the first oil groove on the inner wall of the shaft end and the second oil groove on the outer wall form a lubrication path that is linked internally and externally. Combined with the intermittent engagement of the left-hand spiral groove on the crankshaft surface and the oil groove in the inner hole of the steel cover, this achieves uniform coverage of the lubricating oil across the entire contact surface between the crankshaft and the steel cover, while the disconnected oil groove structure ensures the sealing performance of the oil circuit. Simultaneously, some lubricating oil is transported to the low-pressure area through the crankshaft's inner hole channel, providing comprehensive and continuous lubrication protection for the core moving components, effectively reducing frictional loss, lowering the probability of component wear, and extending the overall service life of the compressor.

[0016] 2. In this utility model, the collaborative structure of the sliding cover, spring, movable ball, and limiting groove allows for quick assembly and disassembly of the crankshaft and fixed shaft without the need for complex tools. Sliding the sliding cover releases the movable ball's limitation on the crankshaft, facilitating the removal of components for cleaning and maintenance. After resetting, the spring drives the fixed ring to lock the movable ball, ensuring a secure connection that does not detach. Furthermore, the precise fit between the positioning groove on the left side of the crankshaft and the steel cover ensures coaxiality and positional accuracy during assembly, reducing the impact of installation errors on operation. This improves assembly efficiency, enhances the structural stability of the compressor during operation, and lowers the failure rate. Attached Figure Description

[0017] Figure 1 This is a perspective view of a sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to the present invention.

[0018] Figure 2 This is a schematic diagram of the sliding cover structure of a sealed spiral groove lower cylinder head for an automotive air conditioning compressor proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the second oil groove structure of the sealed spiral groove lower cylinder head of an automotive air conditioning compressor proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the movable ball structure of the sealed spiral groove lower cylinder head of an automotive air conditioning compressor proposed in this utility model.

[0021] Legend:

[0022] 1. Cover end; 2. Shaft end; 3. Hole groove; 4. Steel cover; 5. Crankshaft; 6. Sliding cover; 7. First oil groove; 8. Spring; 9. Fixed shaft; 10. Positioning groove; 11. Second oil groove; 12. Hole; 13. Limiting groove; 14. Moving ball; 15. Fixed ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-3 An embodiment of this utility model provides a sealed spiral groove lower cylinder head for an automotive air conditioning compressor, comprising a steel cover 4 and a shaft end 2. A cover end 1 is fixedly connected to the upper outer wall of the middle of the steel cover 4. The outer wall of the shaft end 2 is disposed inside the upper side of the cover end 1. Multiple holes and grooves 3 are opened on the upper outer wall of the steel cover 4. A fixed shaft 9 is fixedly connected to the lower outer wall of the steel cover 4. A crankshaft 5 is fixedly connected to the lower outer wall of the shaft end 2. The outer wall of the crankshaft 5 is disposed inside the fixed shaft 9. A channel is opened in the middle of the shaft end 2.

[0025] Specifically, when the compressor is working normally, the lubricating oil is spun into the oil groove on one side of the steel cover 4 by the spiral groove, lubricating the contact surface between the crankshaft 5 and the steel cover 4. Since the two sections of the oil groove in the inner hole of the steel cover 4 are disconnected, the lubricating oil on one side cannot flow directly into the oil groove on the other side, thus achieving the function of oil circuit sealing. At the same time, a left-hand spiral groove is opened on the two surfaces of the crankshaft 5, located in the middle position of contact with the two spiral grooves of the steel cover 4. When the crankshaft 5 rotates, it will intermittently contact any oil groove in the inner hole of the steel cover 4 for a period of time, spun in and out of the oil groove, and distribute the oil to the spiral groove on the other side, thus ensuring the lubrication effect of the entire contact surface between the crankshaft 5 and the steel cover 4. When the compressor is working, a small amount of lubricating oil spun out by the spiral groove can also be sent into the low-pressure area through the inner hole of the crankshaft 5 to provide reliable lubrication for the moving parts in the low-pressure area. This device is commonly used to connect the steel cover 4 and the crankshaft 5. By sliding the cover 6, the movable ball 14 inside the fixed shaft 9 loses the constraint of the side retaining ring 15 and will not fall into the side limiting groove 13, thus preventing interference and pressure on the inner crankshaft 5. Therefore, it can be easily removed for cleaning. During installation, slide the cover 6, and after releasing it, the cover 6 will slide downwards under the action of the internal spring 8, causing the retaining ring 15 to fit against the ball groove on the outer wall of the fixed shaft 9, thus preventing slippage. A deep circular groove is machined on the edge of the inner hole to facilitate the entry of lubricating oil for lubrication of the oil passage.

[0026] Reference Figure 3 and Figure 4 Multiple first oil grooves 7 are formed on the upper inner wall of shaft end 2, and multiple second oil grooves 11 are formed on the upper outer wall of shaft end 2. A sliding cover 6 is slidably connected to the outer wall of fixed shaft 9, and a crankshaft 5 is fixedly connected to the lower outer wall of fixed shaft 9. A hole 12 is formed inside the lower side of fixed shaft 9, and multiple movable balls 14 are arranged inside the hole 12. A limiting groove 13 is formed on the middle outer wall of crankshaft 5 to accommodate multiple movable balls 14. A spring 8 is sleeved on the lower outer wall of fixed shaft 9, and the outer wall of spring 8 is set on the upper side of the outer wall of fixed ring 15. A positioning groove 10 is formed on the left outer wall of crankshaft 5 to be positioned inside the lower side of steel cover 4.

[0027] Specifically, the multiple first oil grooves 7 on the upper inner wall of the shaft end 2 can guide the lubricating oil to flow along the inner hole of the shaft end 2, delivering lubricating medium to the contact parts between the shaft end and related components, reducing friction loss; the multiple second oil grooves 11 on the upper outer wall can lubricate the mating surfaces of the shaft end 2 and the cover end 1, forming a lubrication path that echoes the first oil grooves 7, improving the overall lubrication effect. The sliding cover 6, which is slidably connected to the outer wall of the fixed shaft 9, is a key component for realizing the quick assembly and disassembly of the crankshaft 5 and the fixed shaft 9. The constraint state of the movable ball 14 can be controlled by sliding; the hole 12 inside the lower side of the fixed shaft 9 provides installation space for the movable ball 14. The movement of the movable ball 14 in the hole 12 can achieve axial limitation of both when embedded in the limiting groove 13 of the crankshaft 5, ensuring connection stability, and facilitating the separation of components when disengaged. The limiting groove 13 on the outer wall of the crankshaft 5 engages with the movable ball 14 to precisely limit the relative movement of the crankshaft 5 and the fixed shaft 9. The spring 8, fitted onto the lower outer wall of the fixed shaft 9, provides the resetting force for the sliding cover 6. When the sliding cover 6 is released, the spring force of the spring 8 pushes the sliding cover 6 downwards, causing the fixing ring 15 to fit against the ball groove on the outer wall of the fixed shaft 9, thereby locking the movable ball 14 and preventing it from falling off. The positioning groove 10 on the left outer wall of the crankshaft 5 engages with the internal structure on the lower side of the steel cover 4, enabling rapid positioning of the relative positions of the crankshaft 5 and the steel cover 4 during assembly, ensuring their coaxiality, improving assembly accuracy and efficiency, and ensuring the stability of the compressor during operation.

[0028] Working Principle: When the compressor is working, the crankshaft 5 rotates, driving the shaft end 2 to move synchronously. The first oil groove 7 on the inner wall of the upper side of the shaft end 2 and the second oil groove 11 on the outer wall work together. The first oil groove 7 guides the lubricating oil to flow along the inner hole of the shaft end 2, while the second oil groove 11 delivers the lubricating oil to the mating surface of the shaft end 2 and the cover end 1, forming a continuous lubrication cycle and reducing the friction caused by the relative movement of the two. During the rotation of the crankshaft 5, the left-hand spiral groove on its surface intermittently contacts the oil groove in the inner hole of the steel cover 4. When the spiral groove contacts one side of the oil groove, the lubricating oil in that side of the oil groove is spiraled out. Some of the lubricating oil is carried into the other side of the oil groove with the rotation of the spiral groove, realizing the replenishment of lubricating oil in both sides of the oil groove and ensuring uniform lubrication of the entire contact surface between the crankshaft 5 and the steel cover 4. At the same time, the two sections of the oil groove in the inner hole of the steel cover 4 are in a disconnected state, preventing the direct flow of lubricating oil and playing a role in sealing the oil passage. A small amount of lubricating oil spiraled out through the spiral groove is sent to the low-pressure area of ​​the compressor through the channel in the inner hole of the crankshaft 5, providing lubrication for the moving parts in the low-pressure area and ensuring their normal operation. When disassembly and cleaning are required, slide the cover 6 on the outer wall of the fixed shaft 9. The cover 6 drives the fixed ring 15 to move upward and compress the spring 8. The movable ball 14 loses the constraint of the fixed ring 15 and comes out of the limiting groove 13 of the crankshaft 5. At this time, the crankshaft 5 can be easily removed. During installation, release the cover 6. The spring 8 returns to its original position and pushes the cover 6 downward. The fixed ring 15 fits into the ball groove on the outer wall of the fixed shaft 9 and squeezes the movable ball 14 to embed it into the limiting groove 13, thus achieving a stable connection between the crankshaft 5 and the fixed shaft 9. At the same time, the positioning groove 10 on the left side of the crankshaft 5 cooperates with the steel cover 4 to complete precise positioning.

[0029] The circuits and protections involved in the above embodiments are all based on the actual situation and adopt the corresponding existing technologies. Therefore, they will not be described in detail in the embodiments of this application.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 sealed spiral groove lower cylinder head for an automotive air conditioning compressor, characterized in that, Includes a steel cover (4) and a shaft end (2). The upper outer wall of the steel cover (4) is fixedly connected to a cover end (1). The outer wall of the shaft end (2) is located inside the upper side of the cover end (1). The upper outer wall of the steel cover (4) has multiple holes and slots (3). The bottom outer wall of the steel cover (4) is fixedly connected to a fixed shaft (9). The lower outer wall of the shaft end (2) is fixedly connected to a crankshaft (5). The outer wall of the crankshaft (5) is located inside the fixed shaft (9). The middle of the shaft end (2) has a channel.

2. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 1, characterized in that: The upper inner wall of the shaft end (2) is provided with a plurality of first oil grooves (7), and the upper outer wall of the shaft end (2) is provided with a plurality of second oil grooves (11).

3. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 1, characterized in that: A sliding cover (6) is slidably connected to the outer wall of the fixed shaft (9), and a crankshaft (5) is fixedly connected to the lower outer wall of the fixed shaft (9).

4. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 1, characterized in that: The fixed shaft (9) has a hole (12) inside its lower side, and multiple movable balls (14) are arranged inside the hole (12).

5. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 4, characterized in that: A limiting groove (13) is provided on the middle outer wall of the crankshaft (5) to accommodate multiple movable balls (14).

6. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 1, characterized in that: A spring (8) is sleeved on the lower outer wall of the fixed shaft (9), and the outer wall of the spring (8) is set on the upper side of the outer wall of the fixed ring (15).

7. The sealed spiral groove lower cylinder head for an automotive air conditioning compressor according to claim 1, characterized in that: The crankshaft (5) has a positioning groove (10) on the outer left side for positioning inside the steel cover (4) on the lower side.

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