CN211737458U - An oil-free scroll air compressor integrated eccentric shaft - Google Patents

Abstract

The utility model relates to an integrated eccentric shaft of an oil-free scroll air compressor, which is used for connecting a tray and a drive shaft, the drive shaft is used to drive the tray to eccentrically revolve and translate, and the tray is away from the eccentric shaft A moving plate is arranged on the side, the tray is used to hold the moving plate, and includes an eccentric assembly, a balance block and a drive assembly, the eccentric assembly is arranged at one end of the drive assembly, and the balance weight is arranged at one side of the eccentric assembly , the balance block and the eccentric assembly are integrally formed, and the balance block is used to balance the unbalanced inertial force caused by the rotation of the moving plate driven by the eccentric assembly. The block and the eccentric component are arranged to be integrally formed, and there is no need to add a connecting piece between the balance block and the eccentric component, and the phenomenon of axial stress concentration is reduced, thus reducing the processing procedure and processing time.

Description

An oil-free scroll air compressor integrated eccentric shaft

technical field

The utility model relates to the field of mechanical parts, in particular to an integrated eccentric shaft of an oil-free scroll air compressor.

Background technique

The eccentric shaft is an important part of the oil-free scroll air compressor. Most of the eccentric shafts of the oil-free scroll air compressors on the market are composed of an eccentric shaft and a balance block. This structure has the following defects:

1) There are many processes. Because the balance block and the eccentric shaft are connected by bolts, 2 or 3 holes need to be machined on the eccentric shaft and the balance block for installation;

2) Cracks are easy to occur. Because the eccentric shaft is subjected to both bending force and torsion force, the force is complex and the strength requirements are high. Generally, it is heat treated such as quenching and tempering, which is more sensitive to stress concentration, and the stress after a long working time. Cracks are prone to occur in concentrated parts.

Utility model content

In view of the above situation, it is necessary to provide an integrated eccentric shaft for an oil-free scroll air compressor with fewer manufacturing processes and less stress concentration.

An integrated eccentric shaft of an oil-free scroll air compressor is used to drive a tray to rotate and translate eccentrically. A moving plate is arranged on the side of the tray away from the eccentric shaft, and the tray is used to hold the moving plate, including an eccentric shaft. Components, balance weights and drive components, the eccentric component is arranged at one end of the drive component, the balance weight is arranged at one side of the eccentric component, the balance weight and the eccentric component are integrally formed, and the balance weight is used to balance the unbalance caused by the rotation of the moving plate driven by the eccentric component inertial force.

Preferably, the eccentric assembly includes an intermediate member and an eccentric shaft disposed at an eccentric position of the intermediate member, the rotation axis of the intermediate member coincides with the rotation axis of the driving assembly, and the balance weight is disposed on one side of the intermediate member.

The center of gravity when the balance block rotates and the center of gravity when the moving plate and the tray rotate are on both sides of the center of the circle in the same radial direction on the same plane. The product of the weight of the balance block multiplied by the distance from its center of gravity to the center of rotation is A. The product of the sum of the weights multiplied by the distance from the center of gravity to the center of rotation is B, said A and B being equal.

Preferably, the balance weight is C-shaped, and the inner edge of the opening of the balance weight is designed to be close to the outer edge of the middle piece.

Preferably, the length of the eccentric shaft in the axis of rotation is greater than the length of the balance weight in the axis of rotation.

Preferably, the drive assembly includes a drive mounting neck, a first bearing mounting neck, a second bearing mounting neck and a transition portion, and the rotation axes of the intermediate piece, the driving mounting neck, the first bearing mounting neck, the second bearing mounting neck and the transition portion coincide The transition portion is arranged between the first bearing mounting neck and the second bearing mounting neck, and the ends of the first bearing mounting neck and the second bearing mounting neck away from the transition portion are respectively connected to the driving mounting neck and the intermediate piece.

Preferably, the transition portion is a connecting shaft.

Preferably, the drive mounting neck is driven to rotate by a coupling or a pulley.

The above-mentioned one-piece eccentric shaft of oil-free scroll air compressor, by arranging the balance block and the eccentric component into one piece, does not need to add a connecting piece between the balance block and the eccentric component, and the phenomenon of axial stress concentration is reduced, and the processing is reduced. process and processing time.

Description of drawings

Fig. 1 is the structural diagram of the integrated eccentric shaft of the oil-free scroll air compressor of the present invention;

Fig. 2 is another structural diagram of the integrated eccentric shaft of the oil-free scroll air compressor of the present invention;

3 is another structural diagram of the integrated eccentric shaft of the oil-free scroll air compressor of the present invention;

FIG. 4 is a cross-sectional structural view along A-A in FIG. 2 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the integrated eccentric shaft of the oil-free scroll air compressor of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

Please refer to FIG. 1 , an integrated eccentric shaft of the oil-free scroll air compressor of the present invention is used to connect a tray and a drive shaft, the drive shaft is used to drive the tray to eccentrically revolve and translate, and the tray is away from the eccentric A moving plate is arranged on one side of the shaft, and the tray is used to hold the moving plate, including an eccentric assembly 100, a balance block 200 and a drive assembly 300. The eccentric assembly 100 is arranged at one end of the drive assembly 300, and the balance weight 200 is arranged at one end of the eccentric assembly 100. On the other hand, the balance block 200 and the eccentric assembly 100 are integrally formed, and the balance block 200 is used to balance the unbalanced inertial force caused by the rotation of the moving plate driven by the eccentric assembly 100 .

By arranging the balance weight 200 and the eccentric assembly 100 to be integrally formed, there is no need to add a connecting piece between the balance weight 200 and the eccentric assembly 100, and the phenomenon of axial stress concentration is reduced, and the processing procedure and processing time are reduced.

Referring to FIG. 1 , specifically, the eccentric assembly 100 includes a middle piece 120 and an eccentric shaft 110 disposed at an eccentric position of the middle piece 120 . The rotation axis of the middle piece 120 is coincident with the rotation axis of the drive assembly 300 , and the balance weight 200 is arranged on the middle piece. 120 side, and the center of gravity when the balance block 200 rotates and the center of gravity when the moving plate and the tray rotate are on both sides of the center of the circle on the same radial direction on the same plane, the product of the weight of the balance block 200 multiplied by the distance from its center of gravity to the center of rotation is: A. The product of the sum of the weights of the tray and the moving plate multiplied by the distance from the center of gravity to the center of rotation is B, and A and B are equal.

By arranging the balance block 200, the influencing factors of the shaking of the rotor are reduced.

Referring to FIG. 2 , specifically, the balance block 200 is C-shaped, and the inner edge of the opening of the balance block 200 is designed to be in close contact with the outer edge of the middle piece 120 .

Please refer to FIGS. 3-4 . Specifically, the length of the eccentric shaft 110 is greater than the length of the balance block 200 in the axial direction, which facilitates the installation of the moving plate.

Referring to FIG. 1 , specifically, the drive assembly 300 includes a drive mounting neck 340 , a first bearing mounting neck 330 , a second bearing mounting neck 310 and a transition portion 320 , the intermediate piece 120 , the drive mounting neck 340 , and the first bearing mounting neck 330 , The rotation axes of the second bearing mounting neck 310 and the transition portion 320 coincide, the transition portion 320 is arranged between the first bearing mounting neck 330 and the second bearing mounting neck 310, the first bearing mounting neck 330 and the second bearing mounting neck 310 One end away from the transition portion 320 is connected to the drive mounting neck 340 and the middle piece 120, respectively.

Specifically, the rotational axes of the drive mounting neck 340 , the first bearing mounting neck 330 , the second bearing mounting neck 310 and the transition portion 320 are coincident.

Specifically, the transition portion 320 is a connecting shaft.

Specifically, by installing a bearing rotating connection fixing member on the first bearing mounting neck 330 and the second bearing mounting neck 310 , the fixing member fixes the connecting body and serves the purpose of fixing the driving assembly 300 .

Specifically, the drive mounting neck 340 is driven to rotate by a coupling or a pulley.

When in use, the drive assembly 300 drives the eccentric assembly 100 to rotate, and then drives the moving plate to rotate eccentrically. Since the center of gravity generated by the moving plate during eccentric rotation shifts the axis of rotation of the middle piece 120, the moving plate shakes. The rotating center of gravity of the balance block 200 is balanced with the center of gravity when the eccentric shaft 110 drives the moving plate to rotate and then falls on the center of rotation of the middle piece 120 again. Since the balance block 200 and the eccentric assembly 100 are set as one body, the axial stress concentration phenomenon is reduced, and Reduced processing steps and processing time.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to equivalent examples of equivalent changes by using the technical content disclosed above, provided that the technical content of the present invention is not departed from The content of the solution, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides an there is not oily vortex air compressor machine integral type eccentric shaft for connect tray and drive shaft, the drive shaft is used for the drive the eccentric revolution translation of tray, the tray deviates from eccentric shaft one side sets up the driving disk, the tray is used for holding the driving disk, its characterized in that: the balance mechanism comprises an eccentric assembly (100), a balance block (200) and a driving assembly (300), wherein the eccentric assembly (100) is arranged at one end of the driving assembly (300), the balance block (200) is arranged on one side of the eccentric assembly (100), the balance block (200) and the eccentric assembly (100) are integrally formed, and the balance block (200) is used for balancing unbalanced inertia force caused by rotation of a movable disc driven by the eccentric assembly (100).

2. An oil-free vortex air compressor integrated eccentric shaft as claimed in claim 1, wherein: the eccentric assembly (100) comprises an intermediate piece (120) and an eccentric shaft (110) arranged at an eccentric position of the intermediate piece (120), the rotation axis of the intermediate piece (120) is coincident with the rotation axis of the driving assembly (300), and the balance weight (200) is arranged at one side of the intermediate piece (120).

3. An oil-free scroll air compressor integrated eccentric shaft as claimed in claim 2, wherein: the gravity center when the balance weight (200) rotates and the gravity center when the movable disc and the tray rotate are located on two sides of the circle center on the same radial direction of the same plane, the product of the weight of the balance weight (200) multiplied by the distance from the gravity center to the rotation center is A, the product of the sum of the weight of the tray and the movable disc multiplied by the distance from the gravity center to the rotation center is B, and A and B are equal.

4. An oil-free scroll air compressor integrated eccentric shaft as claimed in claim 2, wherein: the balance weight (200) is C-shaped, and the inner edge of an opening of the balance weight (200) is tightly attached to the outer edge of the middle piece (120).

5. An oil-free scroll air compressor integrated eccentric shaft as claimed in claim 2, wherein: the length of the eccentric shaft (110) in the rotational axial direction is greater than the length of the balance weight (200) in the rotational axial direction.

6. An oil-free scroll air compressor integrated eccentric shaft as claimed in any one of claims 2 to 5, wherein: drive assembly (300) is including drive installation neck (340), first bearing installation neck (330), second bearing installation neck (310) and transition portion (320), the axis of rotation coincidence of middleware (120), drive installation neck (340), first bearing installation neck (330), second bearing installation neck (310) and transition portion (320), transition portion (320) set up in between first bearing installation neck (330) and second bearing installation neck (310), first bearing installation neck (330) and second bearing installation neck (310) are kept away from the one end of transition portion (320) is connected respectively drive installation neck (340) and middleware (120).

7. An oil-free vortex air compressor integrated eccentric shaft as claimed in claim 6, wherein: the transition part (320) is a connecting shaft.

8. An oil-free vortex air compressor integrated eccentric shaft as claimed in claim 6, wherein: the drive mounting neck (340) is rotatably driven by a coupling or pulley.

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