High-strength eccentric block for automobile air conditioner compressor

Abstract

The utility model relates to the field of eccentric blocks, in particular to a high-strength eccentric block for an automobile air conditioner compressor, which comprises a main shaft. A protection assembly is arranged on the outer wall of the spindle. The upper end of the main shaft is fixedly connected with an eccentric block; an eccentric shaft is installed on the eccentric block in a threaded mode. Main body structures of all the components are made of high-strength aluminum alloy, the mechanical performance is excellent, meanwhile, the eccentric block is protected from the outside through the protection shell, resistance and friction force borne by the eccentric block when the eccentric block rotates eccentrically on the inner wall of the protection shell are reduced through the pin rollers, and the service life of the eccentric block is prolonged. The eccentric block is not prone to abrasion or deformation in the long-term use process, the clamping block and the clamping groove are arranged between the eccentric block and the main shaft for mutual limiting, stable connection between the eccentric block and the main shaft is achieved through the bolt and the hollow stud, and meanwhile the structure easy to disassemble and assemble is beneficial to maintenance and replacement of all assemblies.

Description

Technical Field

[0001] The utility model belongs to the field of eccentric blocks, and in particular relates to an eccentric block for a high-strength automobile air-conditioning compressor. Background Art

[0002] The eccentric block is usually an elliptical or elliptical cone-shaped metal block. It is a key operating component in the air-conditioning compressor. The eccentric block uses the movement of the eccentric shaft and mechanical rotation to inhale, compress and discharge the low-pressure gas, thereby completing the basic work of the air-conditioning compressor.

[0003] In the prior art, since the eccentric block is in a high-pressure and high-speed rotation environment for a long time, it is easy to wear and deform due to its own insufficient strength, and has a short service life. It needs to be replaced frequently to ensure its functionality. At the same time, the conventional eccentric block and the rotating shaft are often only fixed by bolts. Long-term operation can easily cause the bolts to loosen, causing safety hazards such as the eccentric block falling off.

[0004] Therefore, a high-strength eccentric block for an automobile air-conditioning compressor is proposed. The eccentric block is made of high-strength aluminum alloy and has excellent mechanical properties. It is also equipped with an external protection component to improve the protection of the eccentric block and reduce its wear during use. The eccentric block is also connected and fixed to the rotating main shaft by double bolts to prevent the eccentric block from loosening and falling off. Utility Model Content

[0005] In order to overcome the problem that the existing eccentric block is easily worn and deformed due to its own insufficient strength, and the connection between it and the rotating shaft is not firm enough.

[0006] The technical solution of the utility model is: an eccentric block for a high-strength automobile air-conditioning compressor, comprising a main shaft; a protective assembly is arranged on the outer wall of the main shaft; an eccentric block is fixedly connected to the upper end of the main shaft; an eccentric shaft is threadedly mounted on the eccentric block; the protective assembly comprises a protective shell, a bearing, a first limiting ring, a second limiting ring and a mounting groove; the protective shell is a cylindrical structure with an opening at the upper end; a bearing is fixedly connected to the center of the lower end of the protective shell in a through-going manner; the main shaft is rotatably mounted on the inner wall of the bearing; a first limiting ring is fixedly connected to the lower side edge of the inner wall of the protective shell; a second limiting ring is fixedly connected to the upper side edge of the inner wall of the protective shell; mounting grooves are penetrated at the upper and lower ends of the second limiting ring.

[0007] Preferably, the eccentric block is made of high-strength aluminum alloy with excellent mechanical properties. At the same time, the provision of a protective shell helps to protect the eccentric block from the outside to prevent other parts in the compressor from colliding with the eccentric block due to malfunctions. The eccentric block is slidably arranged between the first limit ring and the second limit ring to prevent the eccentric block from displacement during eccentric rotation. The provision of rollers helps to reduce the resistance and friction encountered by the eccentric block when it rotates eccentrically on the inner wall of the protective shell, ensuring that the eccentric block is not easily worn or deformed during long-term use, solving the problem that the eccentric block is prone to wear and deformation due to its own insufficient strength. A block and a groove are provided between the eccentric block and the main shaft to limit each other, and a stable connection between the eccentric block and the main shaft is achieved through bolts and hollow studs, solving the problem of insufficiently firm connection between the eccentric block and the rotating shaft.

[0008] Preferably, three evenly distributed first screw grooves are provided through the upper and lower ends of the eccentric block; an external thread is provided on the outer wall of the eccentric shaft; the external thread is matched with the first screw groove; the eccentric shaft is threadedly installed on the inner wall of the first screw groove, which helps to realize the rapid disassembly and assembly of the eccentric shaft. By setting first screw grooves in different positions on the eccentric block, the exhaust volume and compression ratio of the compressor can be adjusted by changing the position of the eccentric shaft installed in different first screw grooves to adapt to different working requirements and load conditions.

[0009] Preferably, the rear end of the eccentric block is fixedly connected to two limit blocks symmetrically distributed about the center of the eccentric block; a roller is rotatably installed between the two limit blocks; the ends of the two limit blocks that are away from each other are fitted with the ends of the first limit ring and the second limit ring that are close to each other; the outer wall of the roller is fitted with the inner wall of the protective shell; the eccentric block is slidably arranged between the first limit ring and the second limit ring, which can prevent the eccentric block from being displaced during the eccentric rotation process. The setting of the roller helps to reduce the resistance encountered by the eccentric block during the eccentric rotation of the inner wall of the protective shell, ensuring that the eccentric block is not easily worn or deformed during long-term use. Through the setting of the mounting groove, the one-piece molded structure composed of the limit block and the roller can be removed from the gap of the mounting groove, thereby removing the eccentric block from the inside of the protective shell, which is convenient for inspection or replacement of the eccentric block.

[0010] Preferably, limiting holes are formed through the upper and lower ends of the eccentric block; a positioning column is fixedly connected to the upper end of the main shaft; the limiting hole is matched with the positioning column; a clamping groove uniformly distributed circumferentially about the center of the limiting hole is formed at the lower end of the eccentric block; a clamping block uniformly distributed circumferentially about the center of the positioning column is fixedly connected to the upper end of the main shaft; the clamping block is matched with the clamping groove; by sleeve-mounting the eccentric block on the upper end of the main shaft, the clamping block and the clamping groove are mutually engaged, and the positioning column and the limiting hole are limited to each other, which helps to achieve synchronous rotation of the eccentric block and the main shaft.

[0011] Preferably, a third screw groove is formed at the upper end of the positioning column; a bolt is threadedly installed on the inner wall of the third screw groove; and a stable connection between the bolt and the main shaft is achieved by threading the bolt on the inner wall of the third screw groove.

[0012] Preferably, a hollow stud is fixed to the lower end of the bolt head; a second screw groove is opened at the upper end of the eccentric block; the second screw groove is adapted to the hollow stud; a hollow stud is installed through the inner wall thread of the second screw groove, thereby achieving a stable connection between the bolt and the eccentric block, and a tighter connection between the eccentric block and the main shaft, avoiding loosening of the eccentric block during eccentric rotation, and helping to improve the overall stability of the structure.

[0013] Preferably, the eccentric block is made of aluminum alloy; the over-eccentric block is made of aluminum alloy, which has excellent wear resistance and corrosion resistance and can withstand stress and wear during high pressure and high-speed rotation.

[0014] Beneficial effects of the utility model:

[0015] 1. The setting of the protective shell helps to protect the eccentric block from the outside, preventing other parts in the compressor from colliding with the eccentric block due to failure. The eccentric block is slidably set between the first limit ring and the second limit ring, which can prevent the eccentric block from displacement during eccentric rotation. The setting of the roller helps to reduce the resistance of the eccentric block during eccentric rotation on the inner wall of the protective shell, ensuring that the eccentric block is not easily worn or deformed during long-term use. The setting of the mounting groove can remove the one-piece structure composed of the limit block and the roller from the gap of the mounting groove, thereby removing the eccentric block from the inside of the protective shell, which is convenient for inspection or replacement of the eccentric block.

[0016] 2. The inner wall of the third screw groove is installed with a bolt thread, and a hollow stud is installed with a thread on the inner wall of the second screw groove, so as to realize a stable connection between the eccentric block and the main shaft. The tighter connection between the eccentric block and the main shaft can prevent the eccentric block from loosening during eccentric rotation, which helps to improve the overall stability of the structure;

[0017] 3. By installing the eccentric block sleeve on the upper end of the main shaft, the clamping block and the clamping groove are mutually engaged, and the positioning column and the limiting hole are mutually limited, which helps to achieve the synchronous rotation of the eccentric block and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional structure schematic diagram of a high-strength eccentric block for an automobile air-conditioning compressor of the utility model is shown;

[0019] Figure 2 The three-dimensional structure schematic diagram of the protective assembly of the eccentric block for a high-strength automobile air-conditioning compressor of the utility model is shown;

[0020] Figure 3 The first three-dimensional split structure schematic diagram of an eccentric block for a high-strength automobile air-conditioning compressor of the utility model is shown;

[0021] Figure 4 Shown is a second three-dimensional split structure schematic diagram of an eccentric block for a high-strength automobile air-conditioning compressor of the utility model.

[0022] The marks in the accompanying drawings are: 101, protective shell; 102, bearing; 103, first limit ring; 104, second limit ring; 105, mounting groove; 2, eccentric block; 3, main shaft; 4, eccentric shaft; 5, first screw groove; 6, external thread; 7, limit hole; 8, second screw groove; 9, limit block; 10, roller; 11, positioning column; 12, clamping block; 13, third screw groove; 14, bolt; 15, clamping groove; 16, hollow stud. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Example 1

[0025] See also Figure 1-4 , an eccentric block for a high-strength automobile air-conditioning compressor, comprising a main shaft 3; a protective assembly is arranged on the outer wall of the main shaft 3; an eccentric block 2 is fixedly connected to the upper end of the main shaft 3; an eccentric shaft 4 is threadedly installed on the eccentric block 2; the protective assembly comprises a protective shell 101, a bearing 102, a first limiting ring 103, a second limiting ring 104 and a mounting groove 105; the protective shell 101 is a cylindrical structure with an opening at the upper end; a bearing 102 is fixedly connected to the center of the lower end of the protective shell 101 in a through-through manner; the main shaft 3 is rotatably installed on the inner wall of the bearing 102; a first limiting ring 103 is fixedly connected to the lower side edge of the inner wall of the protective shell 101; a second limiting ring 104 is fixedly connected to the upper side edge of the inner wall of the protective shell 101; and mounting grooves 105 are provided through the upper and lower ends of the second limiting ring 104.

[0026] See also Figure 1 and Figure 2 In this embodiment, three evenly distributed first screw grooves 5 are provided through the upper and lower ends of the eccentric block 2; an external thread 6 is provided on the outer wall of the eccentric shaft 4; the external thread 6 is adapted to the first screw groove 5; the rear end of the eccentric block 2 is fixedly connected to two limit blocks 9 symmetrically distributed about the center of the eccentric block 2; a roller 10 is rotatably installed between the two limit blocks 9; the ends of the two limit blocks 9 that are away from each other are in contact with the ends of the first limit ring 103 and the second limit ring 104 that are close to each other; the outer wall of the roller 10 is in contact with the inner wall of the protective shell 101; the eccentric block 2 is made of aluminum alloy.

[0027] In this embodiment: first, the main shaft 3 is rotatably installed on the inner wall of the bearing 102, and then the eccentric block 2 is sleeved on the upper end of the main shaft 3, and the eccentric shaft 4 is threadedly installed on the inner wall of the first screw groove 5. When the main shaft 3 starts to rotate, the eccentric block 2 fixed to the upper end of the main shaft 3 will be driven to rotate eccentrically synchronously, and the eccentric block 2 will rotate under the limiting clamping of the first limiting ring 103 and the second limiting ring 104. At this time, the roller 10 fits with the inner wall of the protective shell 101 to reduce the resistance of the eccentric block 2 during rotation, thereby reducing the wear of the eccentric block 2 during high-speed rotation, which helps to improve the strength and service life of the eccentric block 2.

[0028] Example 2

[0029] See also Figure 3 and Figure 4 On the basis of Example 1, the present application provides a technical solution: limiting holes 7 are formed through the upper and lower ends of the eccentric block 2; a positioning column 11 is fixedly connected to the upper end of the main shaft 3; the limiting hole 7 is matched with the positioning column 11; a clamping groove 15 which is evenly distributed circumferentially about the center of the limiting hole 7 is formed at the lower end of the eccentric block 2; a clamping block 12 which is evenly distributed circumferentially about the center of the positioning column 11 is fixedly connected to the upper end of the main shaft 3; the clamping block 12 is matched with the clamping groove 15; a third screw groove 13 is formed at the upper end of the positioning column 11; a bolt 14 is threadedly installed on the inner wall of the third screw groove 13.

[0030] In this embodiment: the eccentric block 2 is installed on the upper end of the main shaft 3 by arranging a buckle, so that the block 12 and the slot 15 are mutually engaged, and the positioning column 11 and the limiting hole 7 are mutually limited, which helps to achieve the synchronous rotation of the eccentric block 2 and the main shaft 3, and then the bolt 14 is threadedly installed on the inner wall of the third screw groove 13, and the hollow stud 16 is threadedly installed on the inner wall of the second screw groove 8 during the installation process. The double thread locking design achieves a tighter connection between the main shaft 3 and the eccentric block 2, which helps to improve the overall stability of the structure and prevent the eccentric block 2 from loosening during eccentric rotation.

[0031] When working, firstly, the main shaft 3 is rotated and installed on the inner wall of the bearing 102, and then the eccentric block 2 is snap-fitted to the upper end of the main shaft 3, so that the block 12 and the slot 15 are mutually engaged, and the positioning column 11 and the limiting hole 7 are mutually limited, which is helpful to realize the synchronous rotation of the eccentric block 2 and the main shaft 3, and then the bolt 14 is threadedly installed on the inner wall of the third screw groove 13, and the hollow stud 16 is threadedly installed on the inner wall of the second screw groove 8 during the installation process, so as to realize the stable connection between the main shaft 3 and the eccentric block 2, and finally the eccentric shaft 4 is threadedly installed on the inner wall of the first screw groove 5 to realize the assembly between the components;

[0032] When the main shaft 3 starts to rotate, it will drive the eccentric mass 2 fixed on the upper end of the main shaft 3 to rotate eccentrically synchronously. The eccentric mass 2 will rotate under the limiting clamping of the first limiting ring 103 and the second limiting ring 104. At this time, the roller 10 fits with the inner wall of the protective shell 101 to reduce the resistance of the eccentric mass 2 during rotation, thereby reducing the wear of the eccentric mass 2 during high-speed rotation, and helping to improve the strength and service life of the eccentric mass 2.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An eccentric block for a high-strength automobile air-conditioning compressor, comprising a main shaft (3); characterized in that: The outer wall of the main shaft (3) is provided with a protection component; an eccentric block (2) is fixedly connected to the upper end of the main shaft (3); an eccentric shaft (4) is threadedly mounted on the eccentric block (2); the protection component comprises a protection shell (101), a bearing (102), a first limiting ring (103), a second limiting ring (104) and a mounting groove (105); the protection shell (101) is a cylindrical structure with an opening at the upper end; the bearing (102) is fixedly connected to the center of the lower end of the protection shell (101) in a through-type manner; the main shaft (3) is rotatably mounted on the inner wall of the bearing (102); the first limiting ring (103) is fixedly connected to the lower edge of the inner wall of the protection shell (101); the second limiting ring (104) is fixedly connected to the upper edge of the inner wall of the protection shell (101); and the second limiting ring (104) is provided with mounting grooves (105) at both upper and lower ends.

2. The high-strength eccentric block for automobile air-conditioning compressor according to claim 1, characterized in that: Three evenly distributed first screw grooves (5) are formed through the upper and lower ends of the eccentric block (2); an external thread (6) is formed on the outer wall of the eccentric shaft (4); and the external thread (6) is matched with the first screw grooves (5).

3. The high-strength eccentric block for automobile air-conditioning compressor according to claim 1, characterized in that: The rear end of the eccentric block (2) is fixedly connected to two limit blocks (9) symmetrically distributed about the center of the eccentric block (2); a roller (10) is rotatably mounted between the two limit blocks (9); ends of the two limit blocks (9) that are away from each other are in contact with ends of the first limit ring (103) and the second limit ring (104) that are close to each other; and the outer wall of the roller (10) is in contact with the inner wall of the protective housing (101).

4. The high-strength eccentric block for automobile air-conditioning compressor according to claim 1, characterized in that: The upper and lower ends of the eccentric block (2) are provided with limit holes (7); the upper end of the main shaft (3) is fixedly connected with a positioning column (11); the limit hole (7) and the positioning column (11) are matched; the lower end of the eccentric block (2) is provided with a clamping groove (15) which is evenly distributed around the center of the limit hole (7); the upper end of the main shaft (3) is fixedly connected with a clamping block (12) which is evenly distributed around the center of the positioning column (11); the clamping block (12) and the clamping groove (15) are matched.

5. The high-strength eccentric block for automobile air-conditioning compressor according to claim 1, characterized in that: A third screw groove (13) is formed at the upper end of the positioning column (11); a bolt (14) is threadedly mounted on the inner wall of the third screw groove (13).

6. The high-strength eccentric block for automobile air-conditioning compressor according to claim 5, characterized in that: A hollow stud (16) is fixedly connected to the lower end of the head of the bolt (14); a second screw groove (8) is formed at the upper end of the eccentric block (2); and the second screw groove (8) is matched with the hollow stud (16).

7. The high-strength eccentric block for automobile air-conditioning compressor according to claim 1, characterized in that: The eccentric block (2) is made of aluminum alloy.

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