阅读说明：本技术 曲轴及压缩机 (Crankshaft and compressor ) 是由 吴达 霍喜军 周瑜 于 2020-07-15 设计创作，主要内容包括：本发明提供了一种曲轴及压缩机,涉及压缩机领域,解决了压缩机预热冷冻油时间过长的问题。该曲轴包括包括长轴和具有偏心结构的短轴,短轴上存在有承接部；长轴可转动的设置且长轴上存在有推动组件；推动组件用于在长轴正向转动时与承接部抵接以驱动短轴带动偏心结构转动,并用于在长轴反向转动时与承接部分离以阻断向短轴动力传递；该压缩机包括该曲轴,电机与长轴连接,滚子套设于偏心结构上。本发明长轴可正向和反向转动,长轴反向快速运转带来大量的热量,使压缩机正常工作前冷冻油预热加快；上述曲轴可以根据转向切换预热模式和正常工作模式,可避免压缩机突然反转造成的泵体损坏、制冷剂和冷冻油预热过程泵体损坏。(The invention provides a crankshaft and a compressor, relates to the field of compressors, and solves the problem that the time for preheating refrigeration oil by the compressor is too long. The crankshaft comprises a long shaft and a short shaft with an eccentric structure, wherein a bearing part is arranged on the short shaft; the long shaft is rotatably arranged and is provided with a pushing assembly; the pushing assembly is used for abutting against the bearing part to drive the short shaft to drive the eccentric structure to rotate when the long shaft rotates in the forward direction and is used for separating from the bearing part to block power transmission to the short shaft when the long shaft rotates in the reverse direction; the compressor comprises the crankshaft, the motor is connected with the long shaft, and the roller is sleeved on the eccentric structure. The long shaft can rotate in the forward direction and the reverse direction, and the rapid reverse operation of the long shaft brings a large amount of heat, so that the preheating of the refrigerant oil is accelerated before the compressor works normally; the crankshaft can switch the preheating mode and the normal working mode according to the steering, and can avoid pump body damage caused by sudden reversal of the compressor and pump body damage in the preheating process of the refrigerant and the refrigeration oil.)

1. A crankshaft comprising a major axis and a minor axis having an eccentric configuration, wherein:

the bearing part is arranged on the short shaft;

the long shaft is rotatably arranged and a pushing assembly is arranged on the long shaft;

the pushing assembly is used for being abutted to the bearing part when the long shaft rotates in the forward direction to drive the short shaft to drive the eccentric structure to rotate, and is used for being separated from the bearing part when the long shaft rotates in the reverse direction to block power transmission to the short shaft.

2. A crankshaft according to claim 1, wherein said socket comprises at least two arcuate recesses, all of said arcuate recesses connected defining a rotating cavity for said thrust assembly to rotate in reverse within and a step for abutment with said thrust assembly rotating in forward direction.

3. A crankshaft according to claim 2, wherein all of said arcuate grooves are radially offset connected.

4. The crankshaft of claim 2, wherein the thrust assembly comprises a lobe and a rotor connected, wherein:

the shape of the convex part is matched with that of the rotating cavity; the rotating block is used for abutting against the bearing part when rotating along with the convex part in the forward direction and rotating along the inner wall of the rotating cavity when rotating along with the convex part in the reverse direction.

5. A crankshaft according to claim 4, wherein the outer diameter of the convex portion is not larger than the shortest distance between two of the steps disposed oppositely.

6. A crankshaft according to claim 4 or 5, wherein the receiving part comprises two semicircular grooves which are connected in a staggered manner in the radial direction, and the convex part is of an S-shaped structure arranged at the end part of the long shaft.

7. The crankshaft of claim 6, wherein said lobes, said major axis, and said rotating cavity of an S-shaped configuration are coaxially disposed.

8. A crankshaft according to claim 6, wherein the turning blocks for matching with the corresponding steps are connected to both ends of the convex portion of the S-shaped structure.

9. The crankshaft of claim 4, wherein an elastic part is arranged between the convex part and the rotating block, and the elastic part is used for pulling the rotating block when the long shaft changes the rotating direction so that the convex part pushes or pulls the rotating block to rotate.

10. A crankshaft according to claim 4 or 9, wherein a shaft hole is formed at an eccentric position of an end of the long shaft, a rotating shaft for connecting with the shaft hole is formed on the rotating block, and the rotating block can rotate at the end of the long shaft with the rotating shaft as an axis.

11. A crankshaft according to claim 10, wherein the rotation shaft is disposed opposite to an end of the rotation block for abutting against the step.

12. A crankshaft according to claim 1, wherein said long axis and said short axis are provided with oil passing holes communicating with each other.

13. A compressor comprising a crankshaft according to any one of claims 1 to 12, a motor connected to said shaft, and a roller mounted on said eccentric structure.

Technical Field

The invention relates to the technical field of compressors, in particular to a crankshaft and a compressor.

Background

In the existing rotary compressor, a motor rotor drives a crankshaft of a pump body to rotate together, and the crankshaft rotates to drive a roller sleeved on an eccentric structure of the crankshaft to perform eccentric circular motion in a cylinder, so that the pump body of the compressor normally works. Whereas the conventional rotary compressor generally supports only one-directional rotation operation. According to different application scenes, after the air conditioning system is started, the compressor is always powered on for preheating, so that the motor is heated and conducted to the pump body, the refrigeration oil in the pump body is evaporated, and the liquid refrigeration oil and the liquid refrigerant are prevented from being directly compressed by the pump body of the compressor when the starting compressor directly runs, so that the pump body parts are damaged by liquid impact, the defect is particularly obvious when the heat pump is used for heating, namely the outdoor temperature is low, and the refrigeration oil and the refrigerant are liquefied and deposited in the pump body after the compressor stops working.

The applicant has found that the prior art has at least the following technical problems: in some special severe environments (such as heating in polar regions), if the operation speed of the compressor is too high, the pump body can be damaged, so that the traditional compressor has a long process of preheating the refrigerant oil and can only operate at a low speed.

Disclosure of Invention

The invention aims to provide a crankshaft and a compressor, which aim to solve the technical problem that the compressor preheats the refrigerant oil for too long time before the air conditioning system is started in the prior art; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a crankshaft, comprising a long shaft and a short shaft with an eccentric structure, wherein:

the bearing part is arranged on the short shaft;

the long shaft is rotatably arranged and a pushing assembly is arranged on the long shaft;

the pushing assembly is used for being abutted to the bearing part when the long shaft rotates in the forward direction to drive the short shaft to drive the eccentric structure to rotate, and is used for being separated from the bearing part when the long shaft rotates in the reverse direction to block power transmission to the short shaft.

Preferably, the bearing part comprises at least two arc-shaped grooves, and all the connected arc-shaped grooves define a rotating cavity for the pushing assembly to rotate reversely in the rotating cavity and a step for abutting against the pushing assembly rotating forwards.

Preferably, all the arc-shaped grooves are connected in a staggered mode in the radial direction.

Preferably, the pushing assembly comprises a boss and a rotating block connected, wherein:

the shape of the convex part is matched with that of the rotating cavity; the rotating block is used for abutting against the bearing part when rotating along with the convex part in the forward direction and rotating along the inner wall of the rotating cavity when rotating along with the convex part in the reverse direction.

Preferably, the outer diameter of the convex part is not more than the shortest distance between two oppositely arranged steps.

Preferably, the receiving portion includes two semicircular grooves connected in a staggered manner in the radial direction, and the convex portion is an S-shaped structure arranged at the end of the long shaft.

Preferably, the protrusion, the long shaft and the rotating cavity of the S-shaped structure are coaxially arranged.

Preferably, both ends of the convex part of the S-shaped structure are connected with the rotating blocks matched with the corresponding steps.

Preferably, an elastic part is arranged between the convex part and the rotating block, and the elastic part is used for pulling the rotating block to enable the convex part to push or pull the rotating block to rotate when the long shaft changes the rotating direction.

Preferably, an axial hole is formed in the eccentric position of the end of the long shaft, a rotating shaft connected with the axial hole is arranged on the rotating block, and the rotating block can rotate at the end of the long shaft by taking the rotating shaft as an axis.

Preferably, the rotating shaft and one end of the rotating block, which is used for abutting against the step, are arranged oppositely.

Preferably, the long shaft and the short shaft are provided with oil through holes communicated with each other.

The invention also provides a compressor, which comprises the crankshaft, the motor is connected with the long shaft, and the roller is sleeved on the eccentric structure.

Compared with the prior art, the invention has the following beneficial effects:

1. the crankshaft provided by the invention has a normal working mode and a preheating mode, and when in the normal working mode, the long shaft rotates in the positive direction and is abutted against the bearing part on the short shaft through the pushing assembly to transmit power; in the preheating mode, when the long shaft rotates forwards and backwards, the pushing assembly and the bearing part on the short shaft are separated to block power transmission, the pump body does not work, and at the moment, the motor can drive the long shaft to rotate reversely and quickly to bring a large amount of heat, so that the preheating of the refrigerant oil is accelerated before the compressor works normally; the crankshaft can switch different working modes according to the steering, and can also avoid pump body damage caused by sudden reverse rotation of the traditional compressor and pump body damage in the process of preheating refrigerant and refrigeration oil.

2. The compressor provided by the invention has the crankshaft, so that the power transmission can be started and disconnected according to different turning directions of the motor of the compressor, the condition that the refrigerant oil of the compressor is preheated for too long before starting is prevented, and the pump body damage caused by the refrigerant oil preheating process or the sudden reverse rotation of the compressor of the pump body of the compressor is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a long shaft;

FIG. 2 is a schematic view of an end structure of a long shaft;

FIG. 3 is a perspective view of a stub shaft;

FIG. 4 is a schematic view of the end structure of the stub shaft;

FIG. 5 is a schematic structural diagram of a rotary block;

FIG. 6 is a schematic view of an assembled structure of a crankshaft;

FIG. 7 is a schematic structural view of an embodiment of the spring;

FIG. 8 is a schematic diagram of a configuration in which the major axis provides motive force to the minor axis;

FIG. 9 is a schematic illustration of the A position with the long axis unpowered;

fig. 10 is a schematic of the B position with the long axis unpowered.

FIG. 1, long axis; 101. a shaft hole; 102. a first fixing hole; 11. a convex portion; 12. rotating the block; 121. a rotating shaft fixing hole; 122. a second fixing hole; 13. an elastic portion; 14. a rotating shaft;

2. a minor axis; 21. rotating the cavity; 22. a step;

3. an eccentric structure;

4. an oil through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.