CN214007503U

CN214007503U - Be applied to shaft structure, compressor, air conditioning equipment and vehicle of compressor

Info

Publication number: CN214007503U
Application number: CN202022230988.4U
Authority: CN
Inventors: 钟升; 杨开成; 江国彪; 杨江林
Original assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-08-20
Anticipated expiration: 2030-09-30

Abstract

The application provides a shaft structure applied to a compressor, the compressor with the shaft structure, an air conditioner with the compressor and a vehicle with the air conditioner; the shaft structure includes a first shaft and a second shaft; a fixing hole is formed in the end face of one end of the first shaft, and the fixing hole is eccentrically arranged relative to the first shaft; one end of the second shaft is inserted into the fixing hole and is in interference fit with the fixing hole; wherein, the inner side wall of the fixing hole and/or the circumferential surface of the part of the second shaft extending into the fixing hole are/is provided with unloading parts. The application provides an axle construction sets up the uninstallation portion on the periphery of the part section that stretches into the fixed orifices through the inside wall of fixed orifices and/or second shaft for the interference that causes because of second shaft and fixed orifices interference is connected and is connected the expansibility can reduce through the uninstallation portion and unload completely even and fall, thereby can effectively avoid the circularity and the cylindricity geometry tolerance of primary shaft excircle to worsen, and then prevent that the primary shaft from becoming invalid.

Description

Be applied to shaft structure, compressor, air conditioning equipment and vehicle of compressor

Technical Field

The application belongs to the technical field of refrigeration and heating equipment, and more particularly relates to a shaft structure applied to a compressor, the compressor, an air conditioning device and a vehicle.

Background

In today's air conditioning units, such as in-vehicle air conditioning units, scroll compressors are often used for high efficiency, low noise, and smooth operation. In a scroll compressor, a movable scroll, a fixed scroll, a motor, an eccentric shaft and other components are generally included; one end of the eccentric shaft is connected with a rotor of the motor, the other end of the eccentric shaft, namely an eccentric part of the eccentric shaft, is eccentrically connected with the movable scroll, after the motor is started, the eccentric shaft rotates under the driving of the rotor of the motor, correspondingly, the fixed scroll is in a relatively static state, the movable scroll revolves and translates relative to the fixed scroll under the driving of the eccentric shaft, and scroll teeth of the movable scroll and scroll teeth of the fixed scroll are meshed with each other, so that a compression cavity with constantly changing volume can be formed between the movable scroll and the fixed scroll.

In the presently common scroll compressor, an eccentric shaft, which is one of core components, is generally made in two ways. The eccentric part of the eccentric shaft and the shaft main body are made into a whole, namely a metal bar is selected and then turned, and the eccentric shaft obtained by the method has good roundness and cylindricity shape tolerance of the outer circle, but has the defects of large turning allowance and high processing cost. The other manufacturing method is that the eccentric shaft consists of a shaft main body and an eccentric part which is arranged in a split way, a fixing hole is processed on the end face of the shaft main body, the fixing hole is eccentrically arranged relative to the axis of the shaft main body, and then the eccentric part is inserted by adopting an interference fit method, the method has simple processing technology and saves cost, but the method has the defect that the eccentric amount of the fixing hole is difficult to improve after the shaft diameter of the shaft main body and the inner diameter of the fixing hole are determined; this is because the larger the eccentric amount is, the farther the fixing hole is from the central axis of the shaft body, and because the eccentric portion and the fixing hole are in interference connection, the circumferential surface of the outer circle of the shaft body near the fixing hole is deformed by the expansion force of the interference connection. For example, the roundness of the outer diameter is detected by taking any cross section in the interference area section of the eccentric shaft, and the result shown in FIG. 1 is obtained. In fig. 1 it can be seen that the roundness of the eccentric shaft over an angular region has projected up to about 14.9um, whereas typically the play between the eccentric shaft and the main bearings of the compressor is within 10 um. That is, the interference connection between the shaft body and the eccentric portion of the conventional eccentric shaft is liable to deteriorate the roundness and cylindricity shape tolerance of the outer circle of the shaft body of the eccentric shaft, thereby causing the eccentric shaft to fail.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a be applied to shaft structure, compressor, air conditioning equipment and the vehicle of compressor to solve the compressor among the prior art and lead to the eccentric shaft to warp the technical problem that became invalid because of the eccentric part of eccentric shaft and the fixed orifices interference connection of axle main part.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a shaft structure applied to a compressor, which includes a first shaft and a second shaft; a fixing hole is formed in the end face of one end of the first shaft, and the fixing hole is eccentrically arranged relative to the first shaft; one end of the second shaft is inserted into the fixing hole, and the second shaft is in interference fit with the fixing hole;

and the inner side wall of the fixing hole and/or the circumferential surface of the partial section of the second shaft extending into the fixing hole are/is provided with unloading parts.

Alternatively, the fixing hole has a thin wall surface and a thick wall surface opposite to the thin wall surface, and a distance from the thin wall surface to the outer peripheral surface of the first shaft in the radial direction is smaller than a distance from the thick wall surface to the outer peripheral surface of the first shaft; the relief portion is disposed at least partially facing the thin-walled surface.

Optionally, the unloading part is a notch arranged on the second shaft, and the notch is arranged towards the hole bottom surface of the fixing hole and towards the thin-wall surface opening.

Optionally, the notch includes a notch bottom surface and a notch side surface adjacent to each other, the notch bottom surface is disposed facing the hole bottom surface of the fixing hole, and the notch side surface is disposed facing at least the thin wall surface.

Optionally, the cut-out side is planar.

Optionally, the notch side surface is an arc surface, an inner concave point with the shortest distance to the outer peripheral surface of the first shaft is arranged on the cross section of the thin wall surface, the notch side surface is provided with an outer convex point with the shortest distance to the thin wall surface, and the outer convex point, the inner concave point, the central point of the second shaft and the central point of the first shaft are arranged in a collinear manner on the same horizontal section.

Optionally, in the axial direction of the second shaft, the length of the partial section of the second shaft extending into the fixing hole is L, the length of the notch is L1, and L1 is greater than 1/5L but less than L.

Optionally, the unloading portion is an annular or arcuate slot.

Optionally, an end face of the first shaft, on which the fixing hole is formed, is taken as a top face, and an end face of the second shaft, which extends into the fixing hole, is taken as a bottom face;

the unloading part is arranged on the inner side wall of the fixing hole, and the distance between the center line of the unloading part and the top surface is larger than the distance between the center line of the unloading part and the bottom surface in the axial direction along the first axis.

the unloading part is arranged on the circumferential surface of a partial section of the second shaft extending into the fixing hole, and the distance between the center line of the unloading part and the top surface is smaller than the distance between the center line of the unloading part and the bottom surface in the axial direction along the first shaft.

Optionally, the end surface of the first shaft, on which the fixing hole is formed, is a top surface, the unloading portion includes a first unloading portion disposed on an inner side wall of the fixing hole, and a second unloading portion disposed on a circumferential surface of the second shaft, and a distance between a center line of the first unloading portion and the top surface is greater than a distance between a center line of the second unloading portion and the top surface in an axial direction along the first shaft.

The application provides a be applied to shaft structure's of compressor beneficial effect lies in: compared with the prior art, what this application embodiment provided is applied to shaft structure of compressor sets up the portion of uninstalling on the periphery of the subsegment of fixed orifices through stretching into of the inside wall of fixed orifices and/or second shaft for the interference that causes because of second shaft and fixed orifices interference connection expansion power can reduce or even completely uninstall through the portion of uninstalling, and like this, the condition that the circumference that the excircle of primary shaft that causes because of interference connection expansion power is located near the fixed orifices can warp just can be effectively improved, thereby can not cause the circularity and the cylindricity geometric shape tolerance of primary shaft excircle to worsen, is favorable to preventing the primary shaft inefficacy. Further, since the problem of the deterioration of the roundness of the outer circle of the first shaft and the geometric tolerance of cylindricity can be solved, the fixing hole can be arranged at a position far away from the center of the first shaft, thereby being beneficial to improving the eccentricity of the shaft structure applied to the compressor.

The present application also proposes a compressor comprising a shaft structure applied to a compressor as previously described.

Compared with the prior art, the compressor provided by the embodiment of the application at least has the following technical effects:

the compressor that this application embodiment provided, through adopting the above-mentioned shaft structure who is applied to the compressor, and this shaft structure who is applied to the compressor has the circularity and the cylindricity geometric shape tolerance improvement of aforementioned first axle excircle to and the technological effect that the eccentricity improves, the event has this compressor that is applied to the shaft structure of compressor and just can avoid leading to the problem of inefficacy because of the shaft structure warp, and then is favorable to improving the operating stability of compressor.

The present application also proposes an air conditioning apparatus comprising a scroll compressor as described above.

Compared with the prior art, the air conditioning device provided by the embodiment of the application at least has the following technical effects:

the air conditioning device that this application embodiment provided, through adopting above-mentioned compressor, and this compressor has the effect that prevents that the eccentric shaft from becoming invalid in order to improve operating stability, so the air conditioning device who has this compressor also can obtain better operating stability.

The present application also proposes a vehicle comprising an air conditioning device as described above.

Compared with the prior art, the vehicle provided by the embodiment of the application at least has the following technical effects:

the vehicle that this application embodiment provided, through adopting above-mentioned air conditioning equipment, and this air conditioning equipment has better operating stability, so the vehicle that has this air conditioning equipment just is difficult for taking place air conditioning trouble, and then can reduce the fault rate of vehicle, obtains better driving experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic roundness diagram of an outer circumferential surface of an eccentric shaft applied to a compressor in accordance with the related art;

fig. 2 is a sectional view of a shaft structure applied to a compressor according to a first embodiment of the present application;

fig. 3 is a sectional view of a shaft structure applied to a compressor according to a second embodiment of the present application;

fig. 4 is a structural view of a second shaft applied to the shaft structure of the compressor in fig. 2.

Fig. 5 is a sectional view of a shaft structure applied to a compressor according to a third embodiment of the present application;

fig. 6 is a sectional view of a shaft structure applied to a compressor according to a fourth embodiment of the present application;

fig. 7 is a sectional view of a cross section of the shaft structure applied to the compressor in fig. 5;

fig. 8 is a cross-sectional view of a shaft structure applied to a compressor according to a fifth embodiment of the present application;

FIG. 9 is a cross-sectional view of a scroll compressor provided in accordance with an embodiment of the present application;

fig. 10 is a schematic diagram illustrating a roundness detection result of a shaft structure applied to a compressor according to an embodiment of the present application.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	First shaft	200	Second shaft
110	Fixing hole	300	Unloading part
				310	First unloading groove	320	Second unloading groove
111	Thin wall surface	112	Thick wall surface
				120	The top surface	210	Bottom surface
220	First shaft section	230	Second shaft section
				330	Side of the incision	340	Bottom surface of the notch
530	Support frame	610	Dynamic vortex disk
				620	Static vortex disk	720	Eccentric shaft sleeve
510	High-pressure shell	520	Low-pressure shell
				730	Movable disc shaft sleeve	400	Bearing assembly
611	Connecting flange	612	Connecting groove
				740	Oil-gas separator

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present application are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The embodiment of the application provides a shaft structure applied to a compressor.

Referring to fig. 2, 3, 5, 6 and 9, in various embodiments, the shaft structure applied to the compressor includes a first shaft 100 and a second shaft 200. With the axial direction of the first shaft 100 as the up-down direction, the second shaft 200 is installed on the upper side of the first shaft 100, i.e., the fixing hole 110 is opened on the upper end face of the first shaft 100, the fixing hole 110 is eccentrically disposed with respect to the first shaft 100, and then the lower end of the second shaft 200 is inserted into the fixing hole 110. Here, the axis of the second shaft 110 is also parallel to the axis of the first shaft 100, and the second shaft 200 is interference-fitted with the fixing hole 110, so that the second shaft 200 is firmly connected with the first shaft 100. Specifically, the second shaft 200 includes a first shaft segment 220 protruding into the fixed hole 110 and a second shaft segment 230 protruding from the first shaft 100, the first shaft segment 220 is a partial segment of the second shaft 200 protruding into the fixed hole 110, and the second shaft segment 230 may be used to connect with the orbiting scroll 610 through an eccentric bushing 720 and the like. Wherein, the unloading part 300 is arranged on the circumferential surface of the first shaft section 220 and/or the inner side wall of the fixing hole 110. Specifically, in the first embodiment as shown in fig. 2, the unloading section 300 is provided on the inner wall of the fixing hole 110; in the second embodiment shown in fig. 3, the relief portion 300 is provided on the outer peripheral surface of the second shaft 200; in the third embodiment as shown in fig. 5, the unloading section 300 includes a first unloading groove 310 and a second unloading groove 320, the second unloading groove 320 is provided on the outer circumferential surface of the second shaft 200, and the first unloading groove 310 is provided on the inner wall of the fixing hole 110; in the fourth embodiment shown in fig. 6 and the fifth embodiment shown in fig. 8, the unloading section 300 is provided on the circumferential surface of the second shaft 200.

Based on the structural design, in the embodiment, since the unloading portion 300 is disposed on the inner side wall of the fixing hole 110 and/or the circumferential surface of the partial section of the second shaft 200 extending into the fixing hole 110, the expansion force of the interference connection caused by the interference connection between the second shaft 200 and the fixing hole 110 can be reduced or even completely unloaded by the unloading portion 300, so that the deformation of the circumferential surface of the outer circle of the first shaft 100 near the fixing hole 110 due to the expansion force of the interference connection can be effectively improved, thereby preventing the roundness and the geometric shape tolerance of the outer circle of the first shaft 100 from deteriorating, and being beneficial to preventing the first shaft 100 from failing. Meanwhile, since the problem of the deterioration of the roundness of the outer circle of the first shaft 100 and the geometric tolerance of the cylindricity can be solved, the fixing hole 110 can be arranged at a position far away from the center of the first shaft 100, thereby being beneficial to improving the eccentricity of the shaft structure of the compressor. As shown in fig. 10, after an outer diameter roundness test is performed on any cross section in an interference region section of the first shaft 100 in the present shaft structure, it can be seen that the roundness of the first shaft 100 within a range of 360 degrees protrudes uniformly, and the roundness protrusion amount is within 10um, so that the assembly requirement of the first shaft 100 can be completely met, that is, after improvement, the roundness and cylindricity shape tolerance of the outer circle of the first shaft 100 are both effectively improved, thereby avoiding the occurrence of failure of the first shaft 100 due to excessive deformation.

Here, the fixing hole 110 has a thin wall surface 111 and a thick wall surface 112 opposite to the thin wall surface 111, and a distance from the thin wall surface 111 to the outer peripheral surface of the first shaft 100 is smaller than a distance from the thick wall surface 112 to the outer peripheral surface of the first shaft 100 in a radial direction of a cross section along the first shaft 100. Here, the first shaft 100 and the second shaft 200 are generally cylindrical, and accordingly, the fixing hole 110 is also a cylindrical hole, and an inner wall surface of the fixing hole 110 having a circular section may be divided into two semicircular inner wall surfaces, wherein, on the side where the fixing hole 110 is provided, one of the two semicircular inner wall surfaces, which is far from the central axis of the first shaft 100, may be regarded as a thin wall surface, and the other one of the two semicircular inner wall surfaces, which is near the central axis of the first shaft 100, may be regarded as a thick wall surface. Specifically, as shown in fig. 7, in the same horizontal cross section, the distance between the hole center E of the fixing hole 110 and the point a is greater than the distance between the hole center E of the fixing hole 110 and the point B, and the distance between the thin wall surface 111 and the point B is smaller than the distance between the thick wall surface 112 and the point a, assuming that the points where the diameter passing through the hole center E of the fixing hole 110 and the shaft center F of the first shaft 100 and the outer diameter edge of the first shaft 100 intersect at the same time are the point a and the point B. Further, the unloading section 300 is provided facing the thin wall surface 111. It can be understood that, since the fixing hole 110 is eccentrically disposed on the first shaft 100, the thickness of the first shaft 100 is thinner on the side close to the thin wall surface 111, and the circumferential surface of the outer circumference of the first shaft 100 is more easily deformed by the expansion force of the interference fit connection, but after the unloading portion 300 is disposed to face the thin wall surface 111, the expansion force of the interference fit connection facing the position can be greatly reduced, so that the position is ensured to be less likely to deform, and the roundness and cylindricity shape tolerance of the outer circumference of the first shaft 100 are less likely to deteriorate. Here, to achieve a better unloading effect, the unloading part 300 is optionally provided as an annular groove provided on the circumferential surface of the second shaft 200, i.e., one turn around the second shaft 200, or as an arc-shaped groove, i.e., less than one turn around the second shaft 200. Of course, in other embodiments, the unloading portion 300 may be disposed in other shapes, and is not limited herein. For example, in the longitudinal sectional view taken along the axial direction of the first shaft 100, the unloading portion 300 may be an annular groove with a rectangular cross section as shown in fig. 2 to 4, an annular groove with an arc cross section being concave, or an annular groove with another cross section, and of course, the processing and manufacturing process of the annular groove with a rectangular cross section is more convenient, which is beneficial to reducing the manufacturing cost.

In the first embodiment as shown in fig. 2, an end surface of the first shaft 100, on which the fixing hole 110 is opened, is taken as a top surface 120, and an end surface of the second shaft 200, which extends into the fixing hole 110, is taken as a bottom surface 210; the relief 300 is disposed on the inner wall of the fixing hole 110, and the center line L3 of the relief 300 is located at a distance from the top surface 120 greater than the center line of the relief 300 is located at a distance from the bottom surface 210 in the axial direction along the first axis 100. It can be understood that, when the unloading part 300 is disposed on the inner wall of the fixing hole 110, if it is closer to the top surface 120 of the first shaft 100, the thickness of the area on the first shaft 100 close to the opening of the fixing hole 110 is thinner, which makes the area easy to bend and deform, and further enlarges the opening of the fixing hole 110, resulting in a decrease in eccentric transmission efficiency, and the second shaft 200 is easy to drop from the fixing hole 110, and when the unloading part 300 is farther from the top surface 120 of the first shaft 100, it can perform the function of pressure unloading and avoid the deformation of the opening of the fixing hole 110.

In the second embodiment shown in fig. 3 and 4, the end surface of the first shaft 100, on which the fixing hole 110 is formed, is the top surface 120, and the end surface of the second shaft 200, which extends into the fixing hole 110, is the bottom surface 210; the unloading section 300 is provided on the circumferential surface of the second shaft 200, and the distance from the center line of the unloading section 300 to the top surface 120 is smaller than the distance from the center line L4 of the unloading section 300 to the bottom surface 210 in the axial direction along the first shaft 100 and the second shaft 200. Here, since the unloading part 300 is disposed on the second shaft 200, the slot position has no influence on the first shaft 100 and the fixing hole 110, and when the unloading part 300 is located closer to the top surface 120 of the first shaft 100, the interference connection expansion force near the opening of the fixing hole 110 can be more unloaded, thereby achieving the purpose of preventing the opening of the fixing hole 110 from expanding and deforming and preventing the position of the first shaft 100 adjacent to the top surface 120 from being more easily deformed.

In the third embodiment as shown in fig. 5, the end surface of the first shaft 100 where the fixing hole 110 is opened is the top surface 120, the inner wall of the fixing hole 110 is provided with a first unloading groove 310, the circumferential surface of the second shaft 200 is provided with a second unloading groove 320, and the distance between the central line L3 of the first unloading groove 310 and the top surface 120 is greater than the distance between the central line L4 of the second unloading groove 320 and the top surface 120 along the axial direction of the first shaft 100. In this way, the effects of the first and second embodiments described above can be obtained simultaneously, thereby obtaining a better effect of preventing the roundness and cylindricity geometric tolerance of the outer circle of the first shaft 100 from deteriorating. Here, in order to obtain a better unloading effect of the expansion force of the interference connection, the first unloading groove 310 and the second unloading groove 320 are partially overlapped in the axial direction of the first shaft 100, so that a merged unloading groove is formed, and the slotting length of the merged unloading groove in the axial direction is greater than the slotting length of the first unloading groove 310 and the second unloading groove 320 in the axial direction, but is less than the slotting length of the first shaft section in the axial direction.

Here, the first unloading grooves 310 and the second unloading grooves 320 may be both annularly arranged as shown in fig. 5, or, in other embodiments, the first unloading grooves 310 and the second unloading grooves 320 may also be other shapes, such as both arc-shaped grooves, or the shapes of the first unloading grooves 310 and the second unloading grooves 320 may not be the same, such as the first unloading grooves 310 are in the form of annular grooves, and the second unloading grooves 320 are in the form of arc-shaped grooves, etc. Of course, in order to avoid the influence of the grooving on the rigidity of the second shaft 200 and the first shaft 100, the groove depth of the first unloading groove 310 and the second unloading groove 320 should be shallow, as long as the desired unloading effect can be achieved.

In the fourth embodiment shown in fig. 6 and 7, the unloading section 300 is a notch provided on the second shaft 200, and the notch is open to the thin wall surface 111, and the notch is also open to the bottom surface of the fixing hole 110. Thus, the relief effect of the interference fit expansion force on the thin wall surface 111 side by the notch can prevent the outer circumferential surface of the first shaft 100 on the side from being deformed.

Specifically, the notch includes a notch side surface 330 and a notch bottom surface 340 adjacent to each other, and the notch side surface 330 and the notch bottom surface 340 together enclose a relief portion 300 opened toward the hole bottom surface and the thin-wall surface 111 of the fixing hole 110. The notch bottom surface 340 is disposed facing the hole bottom surface of the fixing hole 110, and preferably, the notch bottom surface 340 is parallel to the hole bottom surface of the fixing hole 110, and of course, the notch bottom surface 340 may be disposed obliquely to the hole bottom surface of the fixing hole 110; meanwhile, the notch side 330 is at least partially disposed facing the thin-wall surface 111, and preferably, the notch side 330 is parallel to the thin-wall surface 111, that is, the notch side 330 and the thin-wall surface 111 both extend along the axial direction of the first shaft 100, but, of course, the notch side 330 and the thin-wall surface 111 may be disposed obliquely.

As shown in fig. 7 in particular, in the present embodiment, the cross section of the notch is a straight line, i.e. the notch side 330 is a plane perpendicular to the hole bottom surface of the fixing hole 110. However, the design is not limited thereto, and the cross section of the notch may also have other shapes, for example, in the fifth embodiment as shown in fig. 8, the cross section of the notch is arranged in a curve, specifically, in an arc shape convex toward the thin wall surface 111, that is, the notch side surface 330 is an arc surface perpendicular to the hole bottom surface of the fixing hole 110 and convex toward the thin wall surface 111. It is understood that in other embodiments, the notch side 330 may also be an arc-shaped surface recessed toward the thin wall 111, or may be a surface with other shapes, such as but not limited to a wave-shaped surface, etc., without limitation, as long as the unloading effect on the expansion force of the interference connection is achieved. Although the design of the notch side 330 as a vertical plane is convenient in terms of manufacturing, in the technical solution shown in fig. 8, the notch side 330 is designed as an arc-shaped surface protruding outward toward the thin wall surface 111, so that the width of the notch side 330 in the front-rear direction is constant, and the cutting amount of the second shaft 200 is less under the condition of a constant unloading effect, and the influence of the notch on the rigidity of the second shaft 200 can be reduced as much as possible.

In an embodiment, on the cross section of the thin wall surface, there is an inward concave point C having the shortest distance to the outer peripheral surface of the first shaft 100, the side surface of the cut arranged in an arc surface has an outward convex point D having the shortest distance to the thin wall surface, and on the same horizontal section, the outward convex point D, the inward concave point C, the central point E of the second shaft 200 (also the hole center E of the fixing hole 110) and the central point F of the first shaft 100 (also the shaft center F of the first shaft 100) are arranged in a collinear manner, so that a better unloading effect on the expansion force of the interference connection can be obtained. Of course, in other embodiments, the outer convex point and the inner concave point, the center point of the second shaft 200, and the center point of the first shaft 100 may not be collinear.

In one embodiment, the first shaft segment has a length L and the cutout has a length L1 in the axial direction along the second shaft 200, and L1 is greater than 1/5L but less than L. It can be understood that, when the unloading part 300 is a notch formed on the second shaft 200, and the length L1 of the notch is greater than 1/5L, the length of the axial notch of the unloading part 300 is longer, so that a better unloading effect on the expansion force of the interference connection can be obtained, but at the same time, the length of the notch should be smaller than the axial length L of the first shaft section, so as to prevent the notch from extending out of the first shaft 100, and further influence the interference fit connection of the second shaft 200 and the first shaft 100, and further avoid the influence on the overall rigidity of the second shaft 200 due to the overlong length of the notch, so that the second shaft 200 is not easy to bend or fall off, and further influence the normal eccentric rotation of the shaft structure.

The embodiment of the application also provides a scroll compressor, which is mainly used in a vehicle-mounted air conditioning device of a vehicle, and comprises a shaft structure applied to the compressor, a motor (not shown), an eccentric shaft sleeve 720, a movable scroll 610 and other components, wherein the first shaft 100 is connected with a rotor of the motor, the eccentric shaft sleeve 720 is sleeved on the second shaft 200, and then the movable scroll 610 is connected with the second shaft 200 through the eccentric shaft sleeve 720, so that when the motor drives the first shaft 100 to rotate, the second shaft 200 can be driven to rotate eccentrically, and the movable scroll 610 is driven to rotate horizontally. The specific structure of the shaft structure applied to the compressor refers to the above embodiments, and since the scroll compressor adopts all technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not described in detail herein.

It should be noted that, in the present application, in addition to the aforementioned component structures, the scroll compressor further includes other components, such as a casing including the high pressure housing 510 and the low pressure housing 520, a fixed scroll 620 adapted to engage with the movable scroll 610, an eccentric sleeve 720, and a movable scroll bushing 730. Specifically, a scroll chamber (not shown) in which a motor is built and a motor chamber (not shown) in which an orbiting scroll 610, a fixed scroll 620, a bearing 400, etc. are built are formed inside the casing. As shown in fig. 9 in particular, an annular connecting flange 611 is provided on a bottom surface of the orbiting scroll 610 facing away from the high pressure casing 510, the connecting flange 611 encloses a connecting groove 612, and both the eccentric sleeve 720 and the orbiting scroll sleeve 730 are limitedly accommodated in the connecting groove 612; the first shaft section 220 of the second shaft 200 is connected with the first shaft 100 in an interference fit manner, the second shaft 200 is eccentrically connected with the first shaft 100, the eccentric sleeve 720 is sleeved on the second shaft 200, the second shaft section 230 is eccentrically connected with the eccentric sleeve 720, and one end of the eccentric sleeve 720 in the axial direction abuts against the groove bottom surface of the connecting groove 612. Meanwhile, since the bearing 400 and the orbiting scroll 610 are both rotational parts, in order to reduce friction and prevent the bearing 400 and the orbiting scroll 610 from being worn each other, a gap is formed between a side of the connecting flange 611 facing away from the fixed scroll 620 and an end surface of the bearing 400 facing the orbiting scroll 610.

Further, a bracket 530 is interposed between high-pressure casing 510 and low-pressure casing 520, the motor is provided on the low-pressure casing 520 side, and orbiting scroll 610 is provided on the high-pressure casing 510 side. Because the movable scroll 610 is eccentrically connected with the second shaft 200 through the eccentric sleeve 720, the fixed scroll 620 is connected with the bracket 530, one end of the first shaft 100, which is far away from the movable scroll 610, is connected with the motor and can be driven by the motor to rotate, after the scroll compressor is started, the second shaft 200, the eccentric sleeve 720 and the movable scroll 610 can eccentrically rotate around the central axis of the first shaft 100 under the driving of the rotor of the motor and the first shaft 100, the fixed scroll 620 is relatively static, then the movable scroll 610 can make revolving translation relative to the fixed scroll 620 under the driving of the first shaft 100 to form a compression cavity with constantly changing volume, and then the compression effect on fluid is realized through the change of the compression cavity.

The embodiment of the present application also provides an air conditioning apparatus, which includes core components such as a scroll compressor, a condenser (not shown), and an evaporator (not shown). Specifically, as shown in fig. 9, a suction port (not shown) is provided on the low pressure housing 520, an exhaust port (not shown) is further provided on the fixed scroll 620, and an oil separator 740 communicating with the exhaust port is further provided at a side of the exhaust port; the air inlet is connected to the air outlet of the evaporator of the air conditioner via a pipe, and the air outlet of the air-oil separator 740 is connected to the air inlet of the condenser of the air conditioner via another pipe. In actual operation, a mixed fluid of refrigerant and refrigeration oil is sucked into the low-pressure area of the compressor, which is the interior of the low-pressure housing 520 through the suction port, and is further sucked into the compression chamber to be compressed, and then is discharged to the oil-gas separator 740 through the discharge port of the fixed scroll 620 to be subjected to oil-gas separation. Specifically, the separated refrigerant is discharged out of the accumulator 740 and continuously circulated among the scroll compressor, the condenser and the evaporator to complete the entire heat exchange process, and the separated refrigerant oil is returned into the low pressure housing 520 to lubricate components built in the low pressure housing 520, such as but not limited to a shaft structure applied to the compressor, a motor, etc., and participate in the next cycle. The specific structure of the scroll compressor refers to the above-described embodiment. Since the air conditioner adopts all technical solutions of all the embodiments, all the beneficial effects brought by the technical solutions of the embodiments are also achieved, and are not repeated herein.

The application also provides a vehicle with the air conditioning device, and the vehicle can be provided with the air conditioning device in a proper structure regardless of the size. Specifically, the vehicle comprises a vehicle body and a vehicle head, wherein a cab for people to sit is arranged in the vehicle body, and the air conditioning device is at least partially arranged in the vehicle head of the vehicle. It should be noted that, in order to smoothly complete the whole cooling or heating cycle, in general, in the air conditioner, an air outlet assembly is further provided to communicate with the condenser, and an air outlet of the air outlet assembly communicates with a space to be temperature-regulated, such as a cab of a vehicle, so that air after heat exchange with the refrigerant can be discharged to the space, and a temperature regulation effect of the air conditioner on an indoor space of the vehicle, such as the cab, is achieved. Since the vehicle adopts all the technical solutions of all the embodiments, all the beneficial effects brought by the technical solutions of the embodiments are also achieved, and are not described in detail herein.

In the present application, the specific type of the vehicle is not limited, for example, the vehicle may be a conventional fuel vehicle, and may also be a new energy vehicle, which includes, but is not limited to, a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle, and the like, and the present embodiment is not limited thereto.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shaft structure applied to a compressor, comprising:

the end face of one end of the first shaft is provided with a fixing hole, and the fixing hole is eccentrically arranged relative to the first shaft; and the number of the first and second groups,

one end of the second shaft is inserted into the fixing hole, and the second shaft is in interference fit with the fixing hole;

2. The shaft structure applied to a compressor according to claim 1, wherein the fixing hole has a thin wall surface and a thick wall surface opposite to the thin wall surface; in the radial direction, a distance from the thin wall surface to the outer peripheral surface of the first shaft is smaller than a distance from the thick wall surface to the outer peripheral surface of the first shaft; the relief portion is disposed at least partially facing the thin-walled surface.

3. The shaft structure applied to the compressor according to claim 2, wherein the relief portion is a cutout provided on the second shaft, the cutout being provided toward a hole bottom surface of the fixing hole and facing the thin-walled surface opening.

4. The shaft structure applied to the compressor according to claim 3, wherein the cutout includes a cutout bottom surface and a cutout side surface adjacent to each other, the cutout bottom surface being disposed to face the hole bottom surface of the fixing hole, the cutout side surface being disposed to face the thin wall surface.

5. The shaft structure applied to a compressor according to claim 4, wherein the cutout side is a flat surface.

6. The shaft structure applied to a compressor according to claim 4, wherein the cut side surface is a curved surface, the thin wall surface has, in cross section, an inner concave point having a shortest distance from the outer peripheral surface of the first shaft, and the cut side surface has an outer convex point having a shortest distance from the thin wall surface, and the outer convex point, the inner concave point, the center point of the second shaft, and the center point of the first shaft are arranged in a common line in a horizontal section.

7. The shaft structure applied to a compressor according to claim 3, wherein a length of a partial section of the second shaft protruding into the fixing hole is L in an axial direction of the second shaft, the length of the cutout is L1, and L1 is greater than 1/5L but less than L.

8. The shaft structure applied to a compressor according to claim 2, wherein the unloading portion is an annular groove or an arc-shaped groove.

9. The shaft structure applied to the compressor according to any one of claims 1 to 8, wherein an end surface of the first shaft, on which the fixing hole is opened, is a top surface, and an end surface of the second shaft, on which the fixing hole is protruded, is a bottom surface;

10. The shaft structure applied to the compressor according to any one of claims 1 to 8, wherein an end surface of the first shaft, on which the fixing hole is opened, is a top surface, and an end surface of the second shaft, on which the fixing hole is protruded, is a bottom surface;

11. The shaft structure applied to a compressor according to any one of claims 1 to 8, wherein the end surface of the first shaft on which the fixing hole is opened is a top surface, and the unloading portion includes a first unloading portion provided on an inner side wall of the fixing hole and a second unloading portion provided on a circumferential surface of the second shaft, and a distance from a center line of the first unloading portion to the top surface is larger than a distance from a center line of the second unloading portion to the top surface in an axial direction along the first shaft.

12. A compressor, characterized by comprising a shaft structure applied to a compressor according to any one of claims 1 to 11.

13. An air conditioning apparatus, characterized by comprising a compressor according to claim 12.

14. A vehicle characterized by comprising the air conditioning device of claim 13.