Scroll compressor bushing

Abstract

The utility model relates to the technical field of bushings, in particular to a scroll compressor bushing which comprises an eccentric crank pin, a bushing assembly is arranged on the outer wall of the eccentric crank pin, and a counterweight assembly is arranged on one side of the bushing assembly and located on the outer wall of the eccentric crank pin. The bushing shell is fixed on the outer wall of the eccentric crank pin through the contact ball, the contact surface between the bushing shell and the eccentric crank pin is smaller, abrasion is reduced, meanwhile, after the contact ball is abraded, normal use can be achieved only by replacing the contact ball, practicability is better, and maintenance is convenient; the bottom base plate is fixed to the outer wall of the cover plate through the connecting bolts, a plurality of balancing weights can be selected according to actual requirements, only the balancing weights need to be stacked on the outer walls of the connecting bolts, the device is easier to install and better in stability, and the weight of the balancing weights can be adjusted at any time.

Description

Technical Field

[0001] This utility model relates to the field of bushing technology, specifically to a scroll compressor bushing. Background Technology

[0002] The primary function of a scroll compressor bushing is to reduce friction and wear caused by direct contact, while providing necessary radial flexibility to accommodate the movement of the moving scroll. During the operation of a scroll compressor, the moving scroll rotates translationally within the stationary scroll. This motion generates centrifugal force, increasing the contact force between the moving and stationary scrolls. Without a bushing to cushion this, this contact force would act directly on the eccentric crank pin and the moving scroll, accelerating wear and reducing the compressor's efficiency and lifespan.

[0003] As a buffer against the contact force between the moving scroll and the fixed scroll, the compressor bushing is prone to wear, which can cause structural damage and ultimately compressor bushing failure. This affects the translational rotation within the fixed scroll. For example, existing technologies, such as bushing assemblies and scroll compressors (publication number CN217327670U), utilize a drive shaft including an eccentric crank pin and a moving scroll with a hub. The bushing assembly defines a central axis and has a top and a bottom. The bushing assembly includes a bushing, with the eccentric crank pin fitted within the hub via the bushing to drive the moving scroll, and a counterweight. The counterweight includes a mounting through-hole, and the bushing includes a column. The inner circumferential surface of the mounting through-hole mates with the outer circumferential surface of the column to mount the counterweight to the bushing. The inner and outer circumferential surfaces are interference-fitted and constructed as tapered surfaces inclined towards the top of the bushing assembly and towards its central axis. This invention provides a scroll compressor with improvements in bushing and counterweight components to reduce wear and improve reliability, thereby effectively solving the problems of the prior art. However, its structure still needs improvement, as follows:

[0004] In this scheme, although the design of the counterweight reduces the contact stress between the scroll and the fixed scroll, the weight of the counterweight is a fixed value. Since the counterweight is too light or too heavy, it may cause the system to be unbalanced, which will affect the performance and life of the compressor. Therefore, a scroll compressor bushing is needed to improve the above problems. Utility Model Content

[0005] To address the issue that an excessively light or heavy counterweight in the use of a scroll compressor bushing can lead to system imbalance, thereby affecting the compressor's performance and lifespan, this invention provides a scroll compressor bushing to solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A scroll compressor bushing includes an eccentric crank pin, a bushing assembly is disposed on the outer wall of the eccentric crank pin, and a counterweight assembly is disposed on one side of the bushing assembly and on the outer wall of the eccentric crank pin.

[0008] The bushing assembly includes a bushing housing, which is mounted on the outer wall of the eccentric crank pin. A ball support is provided on the inner wall of the bushing housing. A fixing groove is formed on the inner wall of the ball support. A connecting hole is formed on one side of the fixing groove and on the outer wall of the ball support, wherein the connecting hole and the fixing groove are connected.

[0009] Contact balls are arranged sequentially from top to bottom on the inner wall of the fixing groove. A limit spring is provided directly below the contact balls and at the bottom of the inner cavity of the fixing groove. Gaskets are symmetrically arranged on the outer wall of the bushing housing. Cover plates are respectively provided at the opposite ends of the bushing housing. Mounting holes are provided on the outer wall of the cover plates.

[0010] As a preferred embodiment of this utility model, the counterweight assembly includes a base plate, which is fixed to the outer wall of the eccentric crank pin by a pin. A limiting hole is formed on the outer wall of the base plate, and a connecting bolt is threaded onto the inner wall of the limiting hole.

[0011] As a preferred embodiment of this utility model, one end of the connecting bolt is rotatably connected to the inner wall of the mounting hole, a counterweight is threadedly connected to one side of the bottom pad and located on the outer wall of the connecting bolt, and sealing pads are symmetrically arranged on the outer wall of the bottom pad.

[0012] As a preferred embodiment of this utility model, multiple sets of fixing grooves are provided and are respectively located on the inner wall of the ball bracket, and the fixing grooves are located on one side of the eccentric crank pin, and multiple sets of connecting holes are provided and are respectively located on the outer wall of the ball bracket.

[0013] As a preferred embodiment of this utility model, the contact balls are provided in multiple sets and are respectively located on the inner wall of the fixing groove, wherein the contact balls are attached to the outer wall of the eccentric crank pin, and the connection between the contact balls and the connecting hole is a sliding connection.

[0014] As a preferred embodiment of this utility model, multiple sets of limiting springs are provided and are respectively located on the inner wall of the fixing groove, and the limiting springs are located on one side of the connecting hole.

[0015] As a preferred embodiment of this utility model, multiple sets of mounting holes are provided and are respectively located on the outer wall of the cover plate, and multiple sets of limiting holes are provided and are respectively located on the outer wall of the bottom pad plate.

[0016] As a preferred embodiment of this utility model, the connecting bolts are provided in multiple sets and are respectively located on the inner wall of the limiting hole, and the counterweights are provided in multiple sets and are respectively located on the outer wall of the connecting bolts.

[0017] Compared with the prior art, this utility model, by setting a bushing assembly in the scroll compressor bushing, enables the bushing housing to be fixed to the outer wall of the eccentric crank pin via contact balls. Multiple contact balls are pushed into the inner cavity of the fixing groove through the connecting hole, and the limiting spring applies a thrust to the contact balls, thereby causing the contact balls and the connecting hole to be misaligned to prevent the contact balls from slipping out. The bushing housing is fixed to the outer wall of the eccentric crank pin via the contact balls, and the contact surface between the two is smaller, reducing wear. At the same time, after the contact balls wear out, only the contact balls need to be replaced for normal use, which is more practical and easier to maintain. This solves the problem that the compressor bushing is easily worn, causing structural damage and leading to compressor bushing failure, which affects the translational rotation of the fixed scroll plate.

[0018] This invention enables the adjustment of the weight of the counterweight by setting a counterweight component in the bushing of the scroll compressor. The base plate is fixed to the outer wall of the cover plate by connecting bolts. Multiple counterweights can be selected according to actual needs. The counterweights are simply stacked on the outer wall of the connecting bolts. The device is easier to install, has better stability, and the weight of the counterweight can be adjusted at any time. This solves the problem that too light or too heavy a counterweight may cause system imbalance, which in turn affects the performance and life of the compressor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the bushing housing of this utility model;

[0021] Figure 3 This is a side view of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the fixing groove structure of this utility model;

[0023] Figure 5 This utility model Figure 4 An enlarged schematic diagram of the A structure.

[0024] In the diagram: 1. Eccentric crank pin; 2. Bushing assembly; 201. Bushing housing; 202. Ball support; 203. Fixing groove; 204. Connecting hole; 205. Contact ball; 206. Limiting spring; 207. Gasket; 208. Cover plate; 209. Mounting hole; 3. Counterweight assembly; 301. Base plate; 302. Limiting hole; 303. Connecting bolt; 304. Counterweight block; 305. Sealing gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example: Please refer to Figure 1-5 The scroll compressor bushing shown includes an eccentric crank pin 1, a bushing assembly 2 is provided on the outer wall of the eccentric crank pin 1, and a counterweight assembly 3 is provided on one side of the bushing assembly 2 and on the outer wall of the eccentric crank pin 1.

[0027] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The bushing assembly 2 includes a bushing housing 201, which is mounted on the outer wall of the eccentric crank pin 1. A ball support 202 is provided on the inner wall of the bushing housing 201. A fixing groove 203 is provided on the inner wall of the ball support 202. A connecting hole 204 is provided on one side of the fixing groove 203 and on the outer wall of the ball support 202. The connecting hole 204 and the fixing groove 203 are connected.

[0028] Contact balls 205 are arranged sequentially from top to bottom on the inner wall of the fixing groove 203. A limit spring 206 is arranged directly below the contact ball 205 and at the bottom of the inner cavity of the fixing groove 203. Multiple sets of limit springs 206 are arranged on the inner wall of the fixing groove 203. The limit springs 206 are located on one side of the connecting hole 204. Gaskets 207 are symmetrically arranged on the outer wall of the bushing housing 201. Cover plates 208 are arranged at opposite ports of the bushing housing 201. Multiple sets of mounting holes 209 are opened on the outer wall of the cover plate 208.

[0029] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 and Figure 4The counterweight assembly 3 includes a base plate 301, which is fixed to the outer wall of the eccentric crank pin 1 by a pin. The outer wall of the base plate 301 has a limiting hole 302. Multiple sets of limiting holes 302 are provided and are located on the outer wall of the base plate 301. A connecting bolt 303 is threadedly connected to the inner wall of the limiting hole 302. Multiple sets of connecting bolts 303 are provided and are located on the inner wall of the limiting hole 302. One end of the connecting bolt 303 is rotatably connected to the inner wall of the mounting hole 209. A counterweight block 304 is threadedly connected to one side of the base plate 301 and on the outer wall of the connecting bolt 303. Multiple sets of counterweight blocks 304 are provided and are located on the outer wall of the connecting bolt 303. Sealing gaskets 305 are symmetrically arranged on the outer wall of the base plate 301.

[0030] Based on the above structural features and connection relationship, since the counterweight 304 is fixed on the base surface of the base plate 301, the weight of the counterweight 304 can be adjusted. Multiple counterweights 304 can be selected according to actual needs. The counterweights 304 only need to be stacked on the outer wall of the connecting bolt 303. The device is easier to install, has better stability, and the weight of the counterweight 304 can be adjusted at any time.

[0031] The fixing groove 203 has multiple sets located on the inner wall of the ball support 202 and is located on one side of the eccentric crank pin 1. The connecting hole 204 has multiple sets located on the outer wall of the ball support 202. The contact ball 205 has multiple sets located on the inner wall of the fixing groove 203. The contact ball 205 is attached to the outer wall of the eccentric crank pin 1, and the connection between the contact ball 205 and the connecting hole 204 is a sliding connection.

[0032] In this design, when the scroll compressor bushing is in operation, the cover plates 208, located at opposite ports of the bushing housing 201, are opened. A fixing groove 203 is then formed on the inner wall of the ball support 202. A connecting hole 204 is formed on one side of the fixing groove 203 and on the outer wall of the ball support 202. The connecting hole 204 and the fixing groove 203 are connected, allowing the ball support 202 to be removed from the inner cavity of the bushing housing 201. Multiple contact balls 205 are then pushed into the inner cavity of the fixing groove 203 through the connecting hole 204. Simultaneously, contact balls 205 are arranged sequentially from top to bottom on the inner wall of the fixing groove 203. A limit spring 206 is located directly below the contact balls 205 and at the bottom of the inner cavity of the fixing groove 203. Because the inner cavity of the fixing groove 203 contains multiple sets of contact balls 205, the limit spring 206 applies a pushing force to the contact balls 205, thereby causing the contact balls 205 to... The contact ball 205 and the connecting hole 204 are misaligned to prevent the contact ball 205 from sliding out. After installing the contact ball 205 in all the fixing slots 203, the ball bracket 202 is placed in the inner cavity of the bushing housing 201. Multiple sets of contact balls 205 are provided and are located on the inner wall of the fixing slots 203. The contact ball 205 is attached to the outer wall of the eccentric crank pin 1. Under the effect of the sliding connection between the contact ball 205 and the connecting hole 204, the bushing housing 201 is fixed to the outer wall of the eccentric crank pin 1 by the contact ball 205. The contact surface between the two is smaller, reducing wear. At the same time, after the contact ball 205 is worn, it can be used normally only by replacing the contact ball 205. It is more practical and easier to maintain, thus solving the problem that the compressor bushing is easily worn and causes structural damage, which leads to compressor bushing failure and affects the translational rotation of the fixed scroll plate.

[0033] The base plate 301 is fixed to the outer wall of the eccentric crank pin 1 by a pin. A limiting hole 302 is formed on the outer wall of the base plate 301. A connecting bolt 303 is threaded onto the inner wall of the limiting hole 302. One end of the connecting bolt 303 is rotatably connected to the inner wall of the mounting hole 209, thus fixing the base plate 301 to the outer wall of the eccentric crank pin 1 by the pin. Subsequently, the base plate 301 is fixed to the outer wall of the cover plate 208 by the connecting bolt 303. With a counterweight 304 threaded onto the outer wall of the connecting bolt 303 on one side and sealing gaskets 305 symmetrically arranged on the outer wall of the base plate 301, multiple counterweights 304 can be selected according to actual needs. The counterweights 304 are simply stacked on the outer wall of the connecting bolt 303, making the device easier to install and more stable. Furthermore, the weight of the counterweights 304 can be adjusted at any time, thus solving the problem that excessively light or heavy counterweights may cause system imbalance, thereby affecting the performance and lifespan of the compressor.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scroll compressor bushing, comprising an eccentric crank pin (1), characterized in that: A bushing assembly (2) is provided on the outer wall of the eccentric crank pin (1), and a counterweight assembly (3) is provided on one side of the bushing assembly (2) and on the outer wall of the eccentric crank pin (1). The bushing assembly (2) includes a bushing housing (201), which is mounted on the outer wall of the eccentric crank pin (1). A ball support (202) is provided on the inner wall of the bushing housing (201). A fixing groove (203) is provided on the inner wall of the ball support (202). A connecting hole (204) is provided on one side of the fixing groove (203) and on the outer wall of the ball support (202). The connecting hole (204) and the fixing groove (203) are connected. Contact balls (205) are arranged sequentially from top to bottom on the inner wall of the fixing groove (203). A limit spring (206) is arranged directly below the contact ball (205) and at the bottom of the inner cavity of the fixing groove (203). Gaskets (207) are symmetrically arranged on the outer wall of the bushing housing (201). Cover plates (208) are respectively arranged at opposite ports of the bushing housing (201). Mounting holes (209) are opened on the outer wall of the cover plate (208).

2. The scroll compressor bushing according to claim 1, characterized in that: The counterweight assembly (3) includes a base plate (301), which is fixed to the outer wall of the eccentric crank pin (1) by a pin. A limiting hole (302) is provided on the outer wall of the base plate (301), and a connecting bolt (303) is threaded on the inner wall of the limiting hole (302).

3. A scroll compressor bushing according to claim 2, characterized in that: One end of the connecting bolt (303) is rotatably connected to the inner wall of the mounting hole (209). A counterweight (304) is threadedly connected to one side of the bottom pad (301) and on the outer wall of the connecting bolt (303). Sealing pads (305) are symmetrically arranged on the outer wall of the bottom pad (301).

4. A scroll compressor bushing according to claim 1, characterized in that: The fixing groove (203) is provided in multiple sets and is located on the inner wall of the ball support (202), and the fixing groove (203) is located on one side of the eccentric crank pin (1). The connecting hole (204) is provided in multiple sets and is located on the outer wall of the ball support (202).

5. A scroll compressor bushing according to claim 1, characterized in that: The contact ball (205) is provided in multiple sets and is located on the inner wall of the fixing groove (203). The contact ball (205) is attached to the outer wall of the eccentric crank pin (1), and the contact ball (205) and the connecting hole (204) are connected by sliding connection.

6. A scroll compressor bushing according to claim 1, characterized in that: The limiting spring (206) is provided in multiple sets and is located on the inner wall of the fixing groove (203). The limiting spring (206) is located on one side of the connecting hole (204).

7. A scroll compressor bushing according to claim 3, characterized in that: Multiple sets of mounting holes (209) are provided and are located on the outer wall of the cover plate (208), and multiple sets of limiting holes (302) are provided and are located on the outer wall of the bottom pad plate (301).

8. A scroll compressor bushing according to claim 7, characterized in that: The connecting bolts (303) are provided in multiple sets and are respectively located on the inner wall of the limiting hole (302), and the counterweights (304) are provided in multiple sets and are respectively located on the outer wall of the connecting bolts (303).

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