CN212717707U - Crankshaft and compressor - Google Patents

Abstract

The utility model provides a bent axle and compressor relates to the compressor field, has solved the problem that the compressor preheats the refrigeration oil time overlength. 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 of the utility model can rotate forward and backward, and the rapid backward 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.

Description

Crankshaft and compressor

Technical Field

The utility model belongs to the technical field of the compressor technique and specifically relates to a bent axle and compressor are related to.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crankshaft and a compressor, which 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 utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a crankshaft, including major axis and the minor axis that has 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 utility model also provides a compressor, including above-mentioned bent axle, the motor with the major axis is connected, and the roller cover is located eccentric structural.

Compared with the prior art, the utility model, following beneficial effect has:

1. the utility model provides a crankshaft, which has a normal working mode and a preheating mode, wherein in the normal working mode, the long shaft rotates forwards to transmit power through the butting of the pushing component and the bearing part on the short shaft; 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 utility model provides a compressor owing to possess above-mentioned bent axle, so can realize according to the compressor motor turns to the difference that power transmission opens and the disconnection, prevents that the compressor refrigeration oil from preheating for a specified time before the start, avoids the compressor pump body because preheat the refrigeration oil process or the pump body damage that the compressor reverses suddenly and causes.

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 these 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 clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection 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 or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example 1

The present embodiment provides a crankshaft, which, as shown in fig. 1-10, includes a long shaft 1 and a short shaft 2 having an eccentric configuration 3, wherein:

the minor axis 2 is provided with a bearing part; the long shaft 1 is rotatably arranged and a pushing assembly is arranged on the long shaft 1;

the pushing assembly is used for abutting against the bearing part to drive the short shaft 2 to drive the eccentric structure 3 to rotate when the long shaft 1 rotates forwards, and is used for separating from the bearing part to block power transmission to the short shaft 2 when the long shaft 1 rotates reversely.

Specifically, the eccentric structure 3 may be an eccentric cylindrical structure that is eccentric to the short shaft 2, and when the crankshaft is assembled in the compressor, the rotor of the motor may be connected to the long shaft 1 and drive the long shaft 1 to rotate in the forward direction or in the reverse direction, and the roller (piston) is sleeved on the eccentric structure 3 of the short shaft 2.

The "forward direction" and the "reverse direction" refer to two predetermined opposite directions, and if the clockwise direction is defined as the forward direction, the counterclockwise direction is the reverse direction. Referring to fig. 8 to 10, in the present embodiment, it is specified that the clockwise direction is the forward direction, and the counterclockwise direction is the reverse direction, and this is taken as an example for description.

The long shaft 1 in the embodiment can rotate in two directions under the driving of the motor, and has a normal working mode and a preheating mode, and when in the normal working mode, the long shaft 1 rotates in the positive direction and is abutted against a bearing part on the short shaft 2 through the pushing assembly to transmit power; during the preheating mode, when major axis 1 forward and reverse rotation promotes the subassembly and separates with the accepting part on the minor axis 2 and blocks power transmission, and the pump body is out of work, and accessible motor drive major axis 1 reverse fast run this moment brings a large amount of heats, makes the compressor normal work before the refrigeration oil preheat and accelerate.

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.

As an alternative embodiment, as shown in fig. 3 and 4, the bolster in this embodiment comprises at least two arc-shaped grooves, all the connected arc-shaped grooves defining a rotating cavity 21 for the push assembly to rotate in reverse inside and a step 22 for abutment with the forward rotating push assembly.

Referring to fig. 6, the structural mode that the two or more arc-shaped grooves are spliced to simultaneously define the rotating cavity 21 and the step 22 is convenient for assembly with the pushing component of the long shaft 1, and the structure is simple and stable.

Specifically, referring to fig. 3 and 4, all the arc-shaped grooves are connected in a radially staggered manner. In other words, the arc grooves are eccentrically arranged and communicated with each other.

When the arc-shaped grooves are connected in the above manner, as shown in fig. 4, the matching structure can form steps 22 at the connection part, and the number of the steps 22 is equal to the number of the arc-shaped grooves; the step 22 is used to transmit power in cooperation with the pushing assembly. At the same time, the arc-shaped grooves are connected in the above-mentioned manner to form a communicated rotating cavity 21, and the rotating cavity 21 allows the pushing component of the long shaft 1 to freely rotate reversely therein.

As an alternative embodiment, this embodiment provides a specific embodiment of the pushing assembly, which is shown in fig. 1, 2 and 5, and includes a convex portion 11 and a rotating block 12 connected with each other, wherein:

the shape of the convex part 11 is matched with that of the rotating cavity 21; the rotary block 12 is adapted to abut against the receiving portion when rotating in the forward direction with the projection 11 and to rotate along the inner wall of the rotary cavity 21 when rotating in the reverse direction with the projection 11.

Specifically, the protrusion 11 is disposed at one end of the long shaft 1 for being assembled with the short shaft 2, and since the rotating cavity 21 defined by the plurality of arc-shaped grooves can satisfy that the protrusion 11 freely rotates reversely (counterclockwise) therein, the protrusion 11 cannot directly abut against the step 22 to transmit power, and a rotating block 12 is additionally disposed for transmitting the power of the long shaft 1 to the short shaft 2 (when rotating clockwise).

The function of the rotating block 12 is: when the long shaft 1 rotates counterclockwise as shown in fig. 9 and 10, the arrow direction in the figures indicates the rotation direction of the long shaft 1, one end of the rotating block 12 is fixed on the long shaft 1, and the other end generates friction in the rotating cavity 21, but the friction force is not enough to drive the short shaft 2, and the rotating block 12 rotates along the inner wall of the rotating cavity 21, and the reverse free rotation of the protrusion 11 in the rotating cavity 21 is not interfered, that is, the rotating block 12 does not interfere with the rotation of the long shaft 1. When the rotor rotates clockwise as shown in fig. 8, the arrow direction in the figure indicates the rotation direction of the long shaft 1, the power is transmitted to the rotating block 12 from the long shaft 1, the convex part 11 of the long shaft 1 pushes the rotating block 12, the rotating block 12 abuts against the step 22 of the short shaft 2, and the short shaft 2 can be driven.

In order to enable the protrusion 11 to freely counter-rotate within the rotating cavity 21, as an alternative embodiment, see fig. 8-10, the outer diameter of the protrusion 11 is not greater than the shortest distance between two oppositely disposed steps 22.

When the two end portions of the protrusion 11 with the longest relative distance are reversely rotated to the position between the two oppositely arranged steps 22, the protrusion 11 and the rotating block 12 are not abutted against the steps 22, but because the rotating cavity 21 is limited by the position of the steps 22 at the moment, the distance is at the minimum position, and therefore, when the outer diameter of the protrusion 11 is smaller than the minimum distance, the rotating cavity 21 can be rapidly rotated for a plurality of turns.

For simplification of the structure, as an alternative embodiment, as shown in fig. 3 and 4, the receiving part on the short shaft 2 comprises two semicircular grooves connected in a staggered manner in the radial direction, and the convex part 11 of the long shaft 1 is an S-shaped structure arranged at the end part of the long shaft 1.

In this embodiment, the two semicircular grooves are connected in a radially offset manner to define a rotating cavity 21 for the push assembly to rotate in reverse inside and a step 22 for abutment with the forward rotating push assembly. The protrusion 11 of the present embodiment has an S-shaped structure for matching with the rotating cavity 21 and the step 22, as shown in fig. 8-10.

The bearing part and the convex part 11 in the pushing assembly with the structure are simple in structure and can be matched with each other to realize different working modes during reversing rotation.

As an alternative embodiment, the protrusion 11, the long axis 1 and the rotating cavity 21 of the S-shaped structure are arranged coaxially, see fig. 8-10.

The above components are arranged in a mode that central axes are collinear, so that the convex part 11 on the long shaft 1 can stably rotate in the rotating cavity 21 of the short shaft 2, and a preheating mode and a normal working mode are realized.

As an alternative embodiment, as shown in fig. 8-10, the two ends of the convex portion 11 of the S-shaped structure in the present embodiment are connected with the rotation blocks 12 for matching with the corresponding steps 22.

The two ends of the convex part 11 of the S-shaped structure are matched with the corresponding rotating blocks 12, so that the convex part is abutted with the two corresponding steps 22 to transmit power when the long shaft 1 rotates in the positive direction (clockwise direction in the drawing). The two matching structures facilitate the stable matching of the long shaft 1 and the short shaft 2 so as to realize the smooth rotation of the pump body in the normal working mode.

In order to facilitate the rotation of the rotary block 12 following the protrusion 11, as an alternative embodiment, referring to fig. 8-10, an elastic part 13 is present between the protrusion 11 and the rotary block 12, and the elastic part 13 is used for pulling the rotary block 12 to make the protrusion 11 push or pull the rotary block 12 to rotate when the long axis 1 changes the rotation direction.

The elastic part 13 functions as: when the long shaft 1 rotates anticlockwise, the convex part 11 pulls the rotating block 12 through the elastic part 13, and one end of the rotating block 12 moves along the inner wall of the rotating cavity 21; when the long shaft 1 rotates clockwise instead of counterclockwise, the rotating block 12 can be pulled back and attached to one end of the S-shaped convex part 11 of the long shaft 1, and the S-shaped convex part 11 of the long shaft 1 can be prevented from being abutted to push the rotating block 12.

The elastic portion 13 may be a compression spring, as shown in fig. 7. The corresponding positions of the rotating block 12 and the convex part 11 can be respectively provided with a second fixing hole 122 and a first fixing hole 102, and the two ends of the spring are respectively fixed on the rotating block 12 and the convex part 11 by matching with pins.

In order to realize that the rotating block 12 can rotate on the long shaft 1, as an alternative embodiment, as shown in fig. 1 and fig. 5, a shaft hole 101 is arranged at an eccentric position of the end part of the long shaft 1, a rotating shaft 14 for connecting with the shaft hole 101 is arranged on the rotating block 12, and the rotating block 12 can rotate on the end part of the long shaft 1 by taking the rotating shaft 14 as an axis.

Specifically, the rotating block 12 has a rotating shaft fixing hole 121 disposed corresponding to the axial direction, as shown in fig. 5, the rotating shaft 14 may be a pin, and after the assembly is completed, as shown in fig. 8, the rotating block 12 is located at the end of the long shaft 1 and rotates around the rotating shaft 14 as an axis under the pulling or pushing of the protrusion 11.

As an alternative embodiment, referring to fig. 8, the shaft 14 is disposed opposite to the end of the rotating block 12 for abutting against the step 22.

The above arrangement can enable one end of the rotating block 12, which is used for abutting against the step 22, to adjust the distance between the rotating block and the inner wall of the rotating cavity 21 in the rotating process, and as shown in fig. 8, 9 and 10, when the rotating block rotates in the forward direction, the end of the rotating shaft 14 can abut against the step 22 to transmit power, and when the rotating block rotates in the reverse direction, the end of the rotating shaft 14 is closer to the inner wall of the cavity but cannot abut against the inner wall of the cavity, so that the rotation of the long shaft 1 is prevented from being interfered.

As an alternative embodiment, in order to provide the refrigeration oil for lubricating pump body parts, oil through holes 4 communicated with each other are arranged on the long shaft 1 and the short shaft 2.

Example 2

The embodiment provides a compressor, which is characterized by comprising the crankshaft, wherein a motor is connected with a long shaft 1, and a roller is sleeved on an eccentric structure 3.

The compressor in this embodiment, there are preheat mode and normal operating mode in the during operation, preheat mode: when the motor of the compressor rotates reversely (anticlockwise), the long shaft 1, the convex part 11 on the long shaft and the rotating block 12 are driven to rotate, the rotating block 12 rotates for a certain angle around the rotating shaft 14 and does not interfere with the rotation of the long shaft 1 of the crankshaft (at the moment, the elastic part 13 is in a stretching state), at the moment, the long shaft 1 does not provide power for the short shaft 2 (as shown in fig. 9 and 10), and only the motor and the long shaft 1 rotate in the compressor. The compressor pump body does not rotate under this mode, can not lead to the pump body to damage because refrigeration oil and liquid refrigerant, but the motor high-speed running brings a large amount of heats, makes the refrigeration oil preheat and accelerates, makes liquid refrigerant vaporization simultaneously, avoids the compressor to take liquid to start and causes the liquid to hit the damage.

And (3) a normal working mode: after the compressor is reversely rotated and preheated fully, the motor is enabled to rotate clockwise through a control program. The rotating block 12 is pulled back by the elastic force of the elastic part 13, and abuts against the long shaft 1 (the convex part 11) and the short shaft 2 (the step 22) at the same time (as shown in fig. 8), at this time, the long shaft 1 can provide power for the short shaft 2, the compressor works normally, and the start with liquid is avoided.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (13)

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.

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