Buffer structure of compressor, eccentric wheel and compressor

Abstract

The buffer structure of the compressor comprises a shaft body, the eccentric wheel and a buffer part, the shaft body and the eccentric wheel are connected in a nested mode, and the buffer part is arranged between the shaft body and the eccentric wheel and used for absorbing vibration generated when the shaft body and the eccentric wheel collide. The shaft body comprises a main shaft part and an eccentric pin shaft part which are connected with each other, a groove is formed in the end, close to the eccentric pin shaft part, of the main shaft part, and the buffering piece is arranged in the groove. Visibly, vibration generated by collision of the crankshaft and the eccentric wheel can be buffered, so that noise is eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of power machinery, and in particular relates to a buffer structure of a compressor. Background Art

[0002] With the development of automotive air-conditioning compressor technology, the market demands compressors with higher speeds. However, high speeds generally bring about the problem of high vibration. The main reason for the high vibration of the compressor is that the motor transmits the vibration to the crankshaft and then to other components by the crankshaft. If the vibration reduction function can be achieved on the crankshaft, the vibration of the compressor can be greatly reduced.

[0003] The prior art has a vibration-absorbing material arranged at the center of the crankshaft structure to achieve the effect of vibration reduction, but its structure does not take into account the problem of limited collision noise between the eccentric wheel and the crankshaft when the compressor starts running, and cannot solve the noise problem caused by the contact collision of the eccentric wheel. Utility Model Content

[0004] In view of the above problems, the utility model provides a buffer structure for a compressor, which can solve the problem of limit collision noise occurring between the existing eccentric wheel and the crankshaft, and reduce the noise of the compressor.

[0005] In order to achieve the purpose of the utility model, the following technical solutions are provided:

[0006] In a first aspect, the present application provides a buffer structure of a compressor, comprising a shaft body, an eccentric wheel and a buffer member, wherein the shaft body and the eccentric wheel are nested and connected, and the buffer member is arranged between the shaft body and the eccentric wheel to absorb vibration generated when the shaft body and the eccentric wheel collide;

[0007] The shaft body comprises a main shaft portion and an eccentric pin shaft portion which are connected to each other. A groove is arranged at the end of the main shaft portion close to the eccentric pin shaft portion, and a buffer is arranged in the groove.

[0008] In one embodiment, the groove is an annular groove, the buffer is an annular buffer, and the groove and the buffer are interference fit.

[0009] In one embodiment, the groove is a sink hole, the buffer is installed in the sink hole, there are multiple grooves, and the main shaft parts of the multiple grooves are distributed at circumferential intervals.

[0010] In one embodiment, the sinking hole is circular, the buffer is also circular, and the buffer is fixed in the sinking hole by screws.

[0011] In one embodiment, the sinking hole is rectangular, the buffer is also rectangular, and the buffer is fixed in the sinking hole by screws.

[0012] In one embodiment, the sink hole is connected to the buffer component by adhesive.

[0013] In one embodiment, the buffer is made of a rubber material, a polymer material or a soft metal material.

[0014] In one embodiment, the axis of the eccentric wheel is the same as the axis of the eccentric pin, and the axis of the eccentric wheel is different from the axis of the main shaft.

[0015] In a second aspect, the present application provides an eccentric wheel, comprising a compressor including the buffer structure described in any embodiment of the first aspect.

[0016] In a third aspect, the present application further provides a compressor, comprising the buffer structure described in any embodiment of the first aspect.

[0017] It can be seen that in the present application, a groove is formed at the end of the main shaft portion close to the eccentric pin shaft portion, and a buffer is arranged in the groove. When the eccentric wheel is deflected to adjust the eccentricity, the contact surface of the eccentric wheel and the main shaft portion collides. Due to the presence of the buffer, the vibration generated by the collision between the two is absorbed, thereby achieving the purpose of noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a structural schematic diagram of a compressor including a buffer structure in an embodiment of the present application;

[0020] Figure 2 is an exploded view of a buffer structure in an embodiment of the present application;

[0021] Figure 3 is an exploded view from another angle of a buffer structure in an embodiment of the present application;

[0022] Figure 4 AA cross-sectional view and side cross-sectional schematic view of a crankshaft in an embodiment of the present application;

[0023] Figure 5 This is an overall structural diagram of a buffer structure in an embodiment of the present application;

[0024] Figure 6 This is a side cross-sectional schematic diagram of a buffer structure in an embodiment of the present application.

[0025] Figure 7 It is a schematic diagram of the principle of the crankshaft and eccentric wheel adjustment structure in the embodiment of the present application;

[0026] Figure 8 is a side cross-sectional schematic diagram and an AA cross-sectional diagram of another buffer structure in an embodiment of the present application;

[0027] Fig. 9 is a side cross-sectional view of another buffer structure in an embodiment of the present application;

[0028] Fig.10 It is a side sectional view of another buffer structure in an embodiment of the present application.

[0029] The reference numerals are as follows: 1-crankshaft, 2-eccentric shaft pin, 3-groove, 4-main shaft portion, 5-buffer, 6-eccentric wheel, 7-end face, 8-screw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0033] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] In order to better understand the implementation scheme of the present application, further description is given below in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, Figure 1 Schematic diagram of the structure of a compressor equipped with the present application. Figure 1 As shown, an electric scroll compressor including the buffer structure of the present application is mainly composed of a moving plate assembly, a stationary plate assembly, a bracket assembly, a crankshaft, a buffer member arranged on the crankshaft, an eccentric wheel, a motor assembly, a front cover assembly, an electric control box assembly, a sealing ring, a bearing and a locking screw.

[0037] Its working principle is that the motor drives the crankshaft to rotate, driving the moving plate assembly to revolve around the stator plate assembly, and the moving and stator plates are correspondingly provided with mutually meshing scroll teeth; under the drive of the motor, a crescent-shaped compression chamber is formed between the scroll teeth of the moving and stator plates, continuously compressing the gas toward the center position, and then discharging the compressor from the exhaust port into the air-conditioning circulation system.

[0038] An eccentric wheel with flexible eccentricity adjustment is set between the compressor moving plate assembly and the crankshaft. The eccentric wheel has the functions of balancing weight and adjusting eccentricity. At the beginning of the compressor startup, before the gas force is established, the eccentric wheel will deflect back and forth, and then collide with the outer cylindrical surface of the crankshaft that limits its deflection, thereby generating noise.

[0039] First embodiment

[0040] like Figure 2-Figure 7 As shown, it is a schematic diagram of a buffer structure of a compressor provided in the present application, including a crankshaft 1 and an eccentric wheel 6, the crankshaft 1 and the eccentric wheel 6 are nested and connected, and the crankshaft 1 includes an eccentric shaft pin 2, an annular groove 3, a main shaft portion 4 and an annular buffer 5.

[0041] In an optional embodiment, an end face 7 for abutting against the eccentric wheel 6 is formed at one end of the crankshaft 1 facing the eccentric wheel 6, and an eccentric pin 2 is provided on the end face 7, and the eccentric pin 2 extends into the eccentric wheel 6, so that the crankshaft 1 and the eccentric wheel 6 are nested and connected. The eccentric wheel 6 and the eccentric pin 2 have the same axial direction, and the eccentric wheel 6 rotates around the eccentric pin 2. Since the axis of the eccentric wheel 6 is different from the axis of the main shaft 4, the rotation of the eccentric wheel 6 will be limited by the end face 7 of the main shaft 4 close to the eccentric pin 2, and the rotation angle will not be too large.

[0042] Optionally, the crankshaft 1 and the eccentric wheel 6 are made of metal, preferably steel. The materials of the crankshaft and the eccentric wheel do not constitute a limitation to the present application.

[0043] Optionally, an annular groove 3 is provided at the end of the main shaft portion 4 near the eccentric pin 2, an annular buffer 5 is provided inside the groove 3, and the annular buffer 5 is interference fit with the annular groove 3, so that the annular buffer 5 is tightly fitted with the groove 3. When the eccentric wheel 6 collides with the crankshaft 1, the eccentric wheel 6 collides with the annular buffer 5.

[0044] Preferably, the material of the buffer member 5 may be a rubber material, a polymer material, or a soft metal material. Any material that can play a buffering role may be used as the buffer member 5 of the present application.

[0045] It can be understood that the combination of the annular groove 3 and the annular buffer 5 can minimize the noise of collision, including all possible collision positions between the eccentric wheel 6 and the crankshaft 1. The annular groove 3 in the above embodiment can be circular or other irregular ring shapes. The shape does not constitute a further limitation of this embodiment. Other schemes that only change the shape without paying creative labor should be regarded as equivalent schemes of the present application.

[0046] For easier understanding, the present application is further explained in conjunction with the accompanying drawings. Figure 7 As shown, there is a certain gap between the crankshaft 1 and the eccentric wheel 6. The axis of the eccentric wheel 6 is the same as that of the eccentric pin 2, but different from that of the crankshaft 1. Therefore, the eccentric wheel 6 can only move at a small angle. If the angle exceeds a certain value, it will be limited by the crankshaft 1 and cannot move. Whenever the eccentric wheel 6 is limited by the crankshaft 1, it will collide with the buffer 5, thereby buffering the collision between the crankshaft 1 and the eccentric wheel 6 and reducing noise.

[0047] It can be seen that the present application opens an annular groove 3 at the position of the end face 7 and sets an annular buffer 5. Under the buffering of the buffer 5, the noise generated by the collision between the eccentric wheel 6 and the crankshaft 1 is eliminated. In addition, the crankshaft 1 in the present application is processed by an ordinary lathe, and the material of the buffer 5 is also very easy to obtain, and the implementation difficulty is relatively small.

[0048] Second embodiment

[0049] The similarities with the first embodiment are not repeated here. This embodiment is only different in the groove 3 and the buffer 5 .

[0050] like Figure 8-Figure 10The second embodiment of the present application is shown. The main difference between this embodiment and the first embodiment is that the groove 3 opened on the crankshaft 1 is a sink hole, the buffer 5 is a partial buffer, and the shape of the buffer 5 is the same as the shape of the sink hole. The shape and size of the groove 3 can be freely selected according to needs, and the shape and size of the groove 3 cannot constitute a limitation on the present application. A variety of connection methods can be used between the groove 3 and the buffer 5, as long as the buffer 5 can be fixed on the groove 3, and the connection method between the buffer 5 and the groove 3 cannot constitute a limitation on the present application.

[0051] Exemplarily, the sinking hole may be formed in a circular shape.

[0052] Exemplarily, the sinking hole may also be formed in a rectangular shape.

[0053] Exemplarily, the buffer 5 and the groove 3 may be fixed by screws 8 .

[0054] For example, the buffer 5 and the groove 3 may also be connected by adhesive.

[0055] In order to facilitate understanding of this embodiment, the principle of setting the groove 3 is explained. The gap between the eccentric wheel 6 and the crankshaft 1 is very small, resulting in a relatively limited angle of movement of the eccentric wheel 6. Generally, there will be no large-scale rotation, and it will only move within a small range. Therefore, the position of the groove 3 is located at the position where the eccentric wheel 6 may collide, which can buffer the collision between the eccentric wheel 6 and the crankshaft 1 and achieve the purpose of noise reduction.

[0056] It can be seen that the present application provides the groove 3 at the position where the eccentric wheel 6 may collide, thereby saving buffering materials while buffering the collision between the eccentric wheel 6 and the crankshaft 1, and achieving noise reduction at the minimum cost.

[0057] What is disclosed above is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A buffer structure of a compressor, characterized in that: The crankshaft comprises a crankshaft and an eccentric wheel, wherein the crankshaft comprises a shaft body and a buffer, wherein the shaft body and the eccentric wheel are nested and connected, and the buffer is arranged between the shaft body and the eccentric wheel to buffer the vibration generated when the shaft body and the eccentric wheel collide; The shaft body comprises a main shaft portion and an eccentric pin shaft portion which are connected to each other. A groove is provided at an end of the main shaft portion close to the eccentric pin shaft portion, and the buffer is arranged in the groove.

2. The buffer structure according to claim 1, characterized in that: The groove is an annular groove, the buffer is an annular buffer, and the groove and the buffer are interference-fitted.

3. The structure according to claim 1, characterized in that: The groove is a sinking hole, and the buffer is installed in the sinking hole. There are multiple grooves, and the multiple grooves are distributed at intervals along the circumference of the main shaft.

4. The structure according to claim 3, characterized in that The sinking hole is circular, the buffer is also circular, and the buffer is fixed in the sinking hole by screws.

5. The structure according to claim 4, characterized in that: The sinking hole is rectangular, the buffer is also rectangular, and the buffer is fixed in the sinking hole by screws.

6. The structure according to any one of claims 4-5, characterized in that: The sinking hole is connected to the buffer component by adhesive.

7. The structure according to claim 1, characterized in that The material of the buffer is rubber material, polymer material or soft metal material.

8. The structure according to claim 1, characterized in that The axis of the eccentric wheel is the same as the axis of the eccentric pin shaft, and the axis of the eccentric wheel is different from the axis of the main shaft.

9. An eccentric wheel, characterized in that: The eccentric wheel is applied to a compressor including the buffer structure described in any one of claims 1-8.

10. A compressor, characterized in that: The invention comprises a buffer structure according to any one of claims 1 to 8.

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