Shaft structures used in compressors, compressors, air conditioning units, and vehicles

Abstract

This application provides a shaft structure for a compressor, a compressor having the shaft structure, an air conditioning unit having the compressor, and a vehicle having the air conditioning unit. The shaft structure includes a first shaft and a second shaft. A fixing hole is formed on one end face of the first shaft, and the fixing hole is eccentrically positioned relative to the first shaft. One end of the second shaft is inserted into the fixing hole and is interference-fitted with the fixing hole. An unloading portion is provided on the inner wall of the fixing hole and / or on the circumferential surface of the portion of the second shaft extending into the fixing hole. The shaft structure provided in this application, by providing an unloading portion on the inner wall of the fixing hole and / or on the circumferential surface of the portion of the second shaft extending into the fixing hole, allows the interference fit expansion force caused by the interference fit between the second shaft and the fixing hole to be reduced or even completely unloaded through the unloading portion. This effectively avoids the deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft, thereby preventing the first shaft from failing.

Description

Technical Field

[0001] This application belongs to the field of refrigeration and heating equipment technology, and more specifically, relates to a shaft structure applied to a compressor, a compressor, an air conditioning unit, and a vehicle. Background Technology

[0002] In modern air conditioning systems, such as automotive air conditioning systems, scroll compressors are typically used to achieve high efficiency, low noise, and smooth operation. A scroll compressor usually includes components such as a moving scroll, a stationary scroll, a motor, and an eccentric shaft. One end of the eccentric shaft is connected to the motor rotor, while the other end, the eccentric portion of the eccentric shaft, is eccentrically connected to the moving scroll. After the motor starts, the eccentric shaft rotates under the drive of the motor rotor. Correspondingly, the stationary scroll remains relatively stationary. The moving scroll, driven by the eccentric shaft, revolves and translates relative to the stationary scroll. The scroll teeth of the moving scroll and the stationary scroll mesh with each other, thus forming a compression chamber with continuously changing volume between the moving and stationary scrolls.

[0003] In commonly used scroll compressors, the eccentric shaft, a core component, is typically manufactured in two ways. One method involves integrating the eccentric portion and the shaft body into a single piece, using a metal rod and machining it. This method produces a shaft with good roundness and cylindricity tolerances, but it suffers from a large machining allowance and high processing costs. The other method consists of a shaft body and a separate eccentric portion. The shaft body has a fixed hole machined on its end face, eccentrically positioned relative to the shaft body's axis. The eccentric portion is then inserted using an interference fit. This method is simpler and more cost-effective, but its drawback is that once the shaft diameter and the inner diameter of the fixed hole are determined, it's difficult to increase the eccentricity of the fixed hole. This is because a larger eccentricity means the fixed hole is further from the shaft body's central axis. Since the eccentric portion and the fixed hole are interference-fitted, the circumferential surface of the shaft body near the fixed hole will deform under the expansion force of the interference fit. For example, take any cross-section within the interference region of the eccentric shaft and check the roundness of its outer diameter to obtain... Figure 1 The results are shown. Figure 1 As can be seen, the roundness protrusion of the eccentric shaft within a certain angular range reaches a maximum of approximately 14.9 μm, while the clearance between the eccentric shaft and the compressor's main bearing is typically within 10 μm. In other words, the interference fit between the existing eccentric shaft body and the eccentric part is highly susceptible to causing deterioration in the roundness and cylindricity shape tolerances of the outer circle of the eccentric shaft body, thereby leading to eccentric shaft failure. Summary of the Invention

[0004] The purpose of this application is to provide a shaft structure for a compressor, a compressor, an air conditioning unit, and a vehicle, so as to solve the technical problem in the prior art where the eccentric shaft of the compressor is deformed and fails due to interference fit between the eccentric part of the eccentric shaft and the fixing hole of the shaft body.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a shaft structure for use in a compressor is provided, the shaft structure for use in a compressor includes a first shaft and a second shaft; a fixing hole is provided on one end face of the first shaft, the fixing hole is eccentrically disposed relative to the first shaft; one end of the second shaft is inserted into the fixing hole, the second shaft and the fixing hole are interference fit;

[0006] The inner wall of the fixing hole and / or the circumferential surface of the portion of the second shaft that extends into the fixing hole are provided with an unloading part.

[0007] Optionally, the fixing hole has a thin wall surface and a thick wall surface opposite to the thin wall surface, and in the radial direction, the distance from the thin wall surface to the outer peripheral surface of the first shaft is less than the distance from the thick wall surface to the outer peripheral surface of the first shaft; the unloading part is at least partially disposed facing the thin wall surface.

[0008] Optionally, the unloading part is a cut on the second shaft, the cut being open towards the bottom surface of the fixing hole and towards the thin wall surface.

[0009] Optionally, the cut includes a bottom surface and a side surface adjacent to each other, the bottom surface of the cut facing the bottom surface of the fixing hole, and the side surface of the cut facing at least the thin wall surface.

[0010] Optionally, the side of the cut is planar.

[0011] Optionally, the cut side is an arc surface, and on the cross-section of the thin wall surface, there is an inward concave point that is closest to the outer peripheral surface of the first axis, and the cut side has an outward convex point that is closest to the thin wall surface. On the same horizontal cross-section, the outward convex point, the inward concave point, the center point of the second axis, and the center point of the first axis are collinearly arranged.

[0012] Optionally, along the axial direction of the second axis, the length of the portion of the second axis extending into the fixing hole is L, and the length of the cut is L1, where L1 is greater than 1 / 5L but less than L.

[0013] Optionally, the unloading section is an annular groove or an arc-shaped groove.

[0014] Optionally, the end face of the first shaft with the fixing hole is the top surface, and the end face of the second shaft that extends into the fixing hole is the bottom surface;

[0015] The unloading part is disposed on the inner wall of the fixing hole, and in the axial direction along the first axis, the distance between the centerline of the unloading part and the top surface is greater than the distance between the centerline of the unloading part and the bottom surface.

[0016] Optionally, the end face of the first shaft with the fixing hole is the top surface, and the end face of the second shaft that extends into the fixing hole is the bottom surface;

[0017] The unloading part is disposed on the circumferential surface of the portion of the second shaft that extends into the fixing hole, and in the axial direction along the first shaft, the distance between the centerline of the unloading part and the top surface is less than the distance between the centerline of the unloading part and the bottom surface.

[0018] Optionally, the end face of the first shaft with the fixing hole is the top surface, and the unloading part includes a first unloading part disposed on the inner wall of the fixing hole and a second unloading part disposed on the circumferential surface of the second shaft. Along the axial direction of the first shaft, the distance between the centerline of the first unloading part and the top surface is greater than the distance between the centerline of the second unloading part and the top surface.

[0019] The beneficial effects of the shaft structure for compressors provided in this application are as follows: Compared with the prior art, the shaft structure for compressors provided in this application, by providing an unloading part on the inner wall of the fixing hole and / or on the circumferential surface of the portion of the second shaft extending into the fixing hole, allows the interference fit expansion force caused by the interference fit between the second shaft and the fixing hole to be reduced or even completely unloaded through the unloading part. This effectively improves the situation where the circumferential surface of the outer circle of the first shaft near the fixing hole deforms due to the interference fit expansion force, thus preventing the deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft, which helps prevent the failure of the first shaft. Furthermore, since the problem of deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft can be solved, the fixing hole can be located far from the center of the first shaft, thereby improving the eccentricity of the shaft structure applied to the compressor.

[0020] This application also proposes a compressor that includes the shaft structure applied to the compressor as described above.

[0021] The compressor provided in this application embodiment has at least the following technical advantages compared with the prior art:

[0022] The compressor provided in this application embodiment adopts the above-mentioned shaft structure applied to the compressor. The shaft structure applied to the compressor has the aforementioned technical effects of improving the roundness and cylindricity geometric tolerances of the outer circle of the first shaft and increasing the eccentricity. Therefore, the compressor with the shaft structure applied to the compressor can avoid the problem of failure caused by shaft structure deformation, thereby improving the operating stability of the compressor.

[0023] This application also proposes an air conditioning device that includes a scroll compressor as described above.

[0024] The air conditioning device provided in this application embodiment has at least the following technical effects compared with the prior art:

[0025] The air conditioning device provided in this application embodiment uses the above-mentioned compressor, which has the effect of preventing eccentric shaft failure and improving operational stability. Therefore, the air conditioning device with the compressor can also obtain better operational stability.

[0026] This application also proposes a vehicle that includes the air conditioning unit as described above.

[0027] The vehicle provided in this application embodiment has at least the following technical effects compared with the prior art:

[0028] The vehicle provided in this application embodiment adopts the above-mentioned air conditioning device, which has better operational stability. Therefore, the vehicle with the air conditioning device is less prone to air conditioning failure, thereby reducing the vehicle's failure rate and obtaining a better driving experience. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram illustrating the roundness of the outer circumferential surface of the eccentric shaft used in compressors in the prior art;

[0031] Figure 2 A cross-sectional view of the shaft structure applied to the compressor provided in the first embodiment of this application;

[0032] Figure 3 A cross-sectional view of a shaft structure applied to a compressor, provided in the second embodiment of this application;

[0033] Figure 4 for Figure 2A schematic diagram of the second shaft used in the compressor shaft structure.

[0034] Figure 5 A cross-sectional view of a shaft structure applied to a compressor, provided in the third embodiment of this application;

[0035] Figure 6 This is a cross-sectional view of the shaft structure applied to the compressor provided in the fourth embodiment of this application;

[0036] Figure 7 for Figure 5 A cross-sectional view of the shaft structure used in the compressor;

[0037] Figure 8 A cross-sectional view of a shaft structure applied to a compressor, provided in the fifth embodiment of this application;

[0038] Figure 9 A cross-sectional view of a scroll compressor provided in an embodiment of this application;

[0039] Figure 10 This is a schematic diagram showing the roundness detection results of a shaft structure applied to a compressor according to an embodiment of this application.

[0040] Description of Figure Numbers:

[0041] label name label name 100 First axis 200 Second axis 110 Fixing hole 300 Uninstallation Department 310 First Unloading Slot 320 Second unloading slot 111 Thin wall surface 112 thick noodles 120 Top surface 210 Bottom 220 First section 230 Second section 330 Side of the incision 340 Cut bottom 530 support 610 Moving scroll 620 Static vortex disk 720 Eccentric bushing 510 High-pressure casing 520 Low-pressure housing 730 Moving disc bushing 400 bearings 611 Connecting flange 612 Connecting slot 740 oil-gas separator Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of this application are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0046] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] This application provides a shaft structure for use in a compressor.

[0050] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 as well as Figure 9In several 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 vertical direction, the second shaft 200 is mounted on the upper side of the first shaft 100, i.e., a fixing hole 110 is formed on the upper end face of the first shaft 100. The fixing hole 110 is eccentrically positioned relative to the first shaft 100, and 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 and the fixing hole 110 are interference-fitted to ensure a secure connection between the second shaft 200 and the first shaft 100. Specifically, the second shaft 200 includes a first shaft section 220 extending into the fixing hole 110 and a second shaft section 230 extending out of the first shaft 100. The first shaft section 220 is the portion of the second shaft 200 that extends into the fixing hole 110, and the second shaft section 230 can be used to connect to the moving scroll 610 via components such as an eccentric bushing 720. An unloading portion 300 is provided on the circumferential surface of the first shaft segment 220 and / or on the inner wall of the fixing hole 110. Specifically, in such a case... Figure 2 In the first embodiment shown, the unloading part 300 is disposed on the inner wall of the fixing hole 110; in such a way... Figure 3 In the second embodiment shown, the unloading part 300 is disposed on the outer peripheral surface of the second shaft 200; in such a way... Figure 5 In the third embodiment shown, the unloading part 300 includes a first unloading groove 310 and a second unloading groove 320. The second unloading groove 320 is provided on the outer peripheral surface of the second shaft 200, and the first unloading groove 310 is provided on the inner sidewall of the fixing hole 110; in such a way... Figure 6 The fourth embodiment shown and Figure 8 In the fifth embodiment shown, the unloading parts 300 are all disposed on the circumferential surface of the second shaft 200.

[0051] Based on this structural design, in this embodiment, since an unloading portion 300 is provided on the inner wall of the fixing hole 110 and / or on the circumferential surface of the portion of the second shaft 200 extending into the fixing hole 110, the interference fit expansion force caused by the interference fit between the second shaft 200 and the fixing hole 110 can be reduced or even completely unloaded by the unloading portion 300. This effectively improves the situation where the circumferential surface of the outer circle of the first shaft 100 near the fixing hole 110 deforms due to the interference fit expansion force, thus preventing the deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft 100, which helps prevent the failure of the first shaft 100. Simultaneously, since the problem of deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft 100 can be solved, the fixing hole 110 can be located far from the center of the first shaft 100, thereby improving the eccentricity of the shaft structure applied to the compressor. Specifically, as follows... Figure 10As shown, after taking any cross-section within the interference zone of the first shaft 100 in this shaft structure and performing an outer diameter roundness test, it can be seen that the roundness protrusion of the first shaft 100 within a 360-degree range is relatively uniform, and the roundness protrusion is within 10um, which can fully meet the assembly requirements of the first shaft 100. In other words, after the improvement, the roundness and cylindricity shape tolerances of the outer circle of the first shaft 100 have been effectively improved, thereby avoiding the failure of the first shaft 100 due to excessive deformation.

[0052] It should be noted that the fixing hole 110 has a thin-walled surface 111 and a thick-walled surface 112 opposite to the thin-walled surface 111. In the radial direction along the cross-section of the first shaft 100, the distance from the thin-walled surface 111 to the outer peripheral surface of the first shaft 100 is less than the distance from the thick-walled surface 112 to the outer peripheral surface of the first shaft 100. Here, the first shaft 100 and the second shaft 200 are generally cylindrical, and correspondingly, the fixing hole 110 is also a cylindrical hole. The inner wall surface of the circular cross-section of the fixing hole 110 can be divided into two semi-circular inner wall surfaces. On the side where the fixing hole 110 is located, one semi-circular inner wall surface farther from the central axis of the first shaft 100 can be considered a thin-walled surface, while the other semi-circular inner wall surface closer to the central axis of the first shaft 100 can be considered a thick-walled surface. Specifically, as... Figure 7 As shown, on the same horizontal cross section, points A and B are defined as the points where the diameters of the center E of the fixing hole 110 and the axis F of the first shaft 100 intersect with the outer diameter edge of the first shaft 100. Since the distance between the center E of the fixing hole 110 and point A is greater than the distance between the center E of the fixing hole 110 and point B, the distance between the thin wall surface 111 and point B is less than the distance between the thick wall surface 112 and point A. Furthermore, the unloading part 300 is positioned facing the thin wall surface 111. It can be understood that, due to the eccentric arrangement of the fixing hole 110, the first shaft 100 is thinner on the side near the thin wall surface 111. The circumferential surface of the outer circle of the first shaft 100 at this point is more prone to deformation under the interference fit expansion force. However, by positioning the unloading part 300 facing the thin wall surface 111, the interference fit expansion force facing this point can be greatly reduced, thereby ensuring that this area is less prone to deformation and less likely to cause deterioration of the roundness and cylindricity shape tolerances of the outer circle of the first shaft 100. To achieve better unloading effect, the unloading part 300 may optionally be an annular groove on the circumferential surface of the second shaft 200, that is, it surrounds the second shaft 200 once, or it may be an arc-shaped groove, that is, it surrounds the second shaft 200 less than once. Of course, in other embodiments, the unloading part 300 may also be configured in other shapes, which are not limited here. For example, in a longitudinal sectional view taken along the axial direction of the first shaft 100, the unloading part 300 may be as follows: Figure 2 Zhongzhi Figure 4The annular groove shown has a rectangular cross-section, but it can also be an annular groove with a concave arc cross-section, or an annular groove with other cross-section shapes. Of course, the manufacturing process of an annular groove with a rectangular cross-section is more convenient and helps to reduce manufacturing costs.

[0053] In such Figure 2 In the first embodiment shown, the end face of the first shaft 100 with the fixing hole 110 is the top surface 120, and the end face of the second shaft 200 that extends into the fixing hole 110 is the bottom surface 210; the unloading part 300 is provided on the inner wall of the fixing hole 110, and along the axial direction of the first shaft 100, the distance between the centerline L3 of the unloading part 300 and the top surface 120 is greater than the distance between the centerline of the unloading part 300 and the bottom surface 210. It is understandable that when the unloading part 300 is opened on the inner wall of the fixing hole 110, if it is close to the top surface 120 of the first shaft 100, the thickness of the area of ​​the first shaft 100 near the opening of the fixing hole 110 will be thinner. This will make it easy for the area to bend and deform, thereby enlarging the opening of the fixing hole 110, resulting in a decrease in eccentric transmission efficiency, and the second shaft 200 will also be easy to fall out of the fixing hole 110. When the unloading part 300 is far from the top surface 120 of the first shaft 100, it can play the role of pressure unloading and avoid deformation of the opening of the fixing hole 110.

[0054] In such Figure 3 and Figure 4 In the second embodiment shown, the end face of the first shaft 100 with the fixing hole 110 is the top surface 120, and the end face of the second shaft 200 extending into the fixing hole 110 is the bottom surface 210. The unloading part 300 is disposed on the circumferential surface of the second shaft 200, and along the axial direction of the first shaft 100 and the second shaft 200, the distance between the centerline of the unloading part 300 and the top surface 120 is less than the distance between the centerline L4 of the unloading part 300 and the bottom surface 210. Here, since the unloading part 300 is disposed on the second shaft 200, the slot position has no effect on the first shaft 100 and the fixing hole 110. When the position of the unloading part 300 is closer to the top surface 120 of the first shaft 100, more of the interference connection expansion force near the opening of the fixing hole 110 can be unloaded, thereby achieving the purpose of avoiding the expansion and deformation of the opening of the fixing hole 110 and preventing the adjacent top surface 120 of the first shaft 100 from being more easily deformed.

[0055] In such Figure 5In the third embodiment shown, the end face of the first shaft 100 with the fixing hole 110 is the top surface 120. A first unloading groove 310 is provided on the inner wall of the fixing hole 110, and a second unloading groove 320 is provided on the circumferential surface of the second shaft 200. Along the axial direction of the first shaft 100, the distance between the centerline L3 of the first unloading groove 310 and the top surface 120 is greater than the distance between the centerline L4 of the second unloading groove 320 and the top surface 120. This achieves the effects of both the first and second embodiments, thus better preventing the deterioration of the roundness and cylindricity geometric tolerances of the outer circle of the first shaft 100. To further improve the interference fit expansion force unloading effect, the first unloading groove 310 and the second unloading groove 320 partially overlap in the axial direction of the first shaft 100, forming a merged unloading groove. The axial groove length of this merged unloading groove is greater than the axial groove lengths of both the first and second unloading grooves 310 and 320, but less than the axial length of the first shaft segment.

[0056] Here, the first unloading slot 310 and the second unloading slot 320 can be as follows: Figure 5 The first unloading groove 310 and the second unloading groove 320 are both arranged in a ring shape. Alternatively, in other embodiments, the first unloading groove 310 and the second unloading groove 320 can be other shapes, such as both being arc-shaped grooves, or the shapes of the first unloading groove 310 and the second unloading groove 320 are different, for example, the first unloading groove 310 is an annular groove while the second unloading groove 320 is an arc-shaped groove. Of course, to avoid the impact of the grooves on the stiffness of the second shaft 200 and the first shaft 100, the groove depths of the first unloading groove 310 and the second unloading groove 320 should be relatively shallow, as long as the unloading effect meets the requirements.

[0057] In such Figure 6 and Figure 7 In the fourth embodiment shown, the unloading part 300 is a cut on the second shaft 200, and the cut is open to the thin wall surface 111, while also open to the bottom surface of the fixing hole 110. In this way, by unloading the interference connection expansion force on one side of the thin wall surface 111 through the cut, the purpose of not easily causing deformation of the outer circumferential surface of the first shaft 100 on that side can be achieved.

[0058] Specifically, the cut includes adjacent cut side surfaces 330 and cut bottom surfaces 340, which together form an unloading portion 300 that faces the bottom surface of the fixing hole 110 and the thin wall surface 111. The cut bottom surface 340 faces the bottom surface of the fixing hole 110, and preferably is parallel to the bottom surface of the fixing hole 110. However, the cut bottom surface 340 may also be inclined to the bottom surface of the fixing hole 110. Simultaneously, the cut side surfaces 330 are at least partially facing the thin wall surface 111, and preferably are parallel to the thin wall surface 111, meaning both the cut side surfaces 330 and the thin wall surface 111 extend axially along the first axis 100. Alternatively, the cut side surfaces 330 and the thin wall surface 111 may also be inclined to each other.

[0059] Specifically, such as Figure 7 As shown, in this embodiment, the cross-section of the cut is a straight line, that is, the side surface 330 of the cut is a plane perpendicular to the bottom surface of the fixing hole 110. However, this design is not limited to this; the cross-section of the cut can also be other shapes, for example, in... Figure 8 In the fifth embodiment shown, the cross-section of the cut is curved, specifically an arc convex towards the thin wall surface 111. That is, the side surface 330 of the cut is an arc-shaped surface perpendicular to the bottom surface of the fixing hole 110 and convex towards the thin wall surface 111. It is understood that in other embodiments, the side surface 330 of the cut can also be an arc-shaped surface concave towards the thin wall surface 111, or it can be a surface of other shapes, such as, but not limited to, a wavy surface. This is not limited here, as long as it can achieve the effect of unloading the expansion force of the interference connection. Here, although the design where the side surface 330 of the cut is a vertical plane has manufacturing convenience, in cases where… Figure 8 In the technical solution shown, the cut side 330 is designed with an arc-shaped surface that convexes outward toward the thin wall surface 111. Under the condition that the width of the cut side 330 in the front-back direction is constant and the unloading effect is constant, the cutting amount of the second shaft 200 will be less, thereby minimizing the impact of opening the cut on the stiffness of the second shaft 200.

[0060] In one embodiment, the cross-section of the thin-walled surface has a concave point C that is closest to the outer peripheral surface of the first shaft 100, and the arc-shaped cut side has a convex point D that is closest to the thin-walled surface. On the same horizontal cross-section, the convex point D, the concave point C, the center point E of the second shaft 200 (which is also the center of the fixing hole 110), and the center point F of the first shaft 100 (which is also the axis F of the first shaft 100) are collinearly arranged. This achieves a better unloading effect on the expansion force of the interference connection. Of course, in other embodiments, the convex point and the concave point, the center point of the second shaft 200, and the center point of the first shaft 100 may not be collinearly arranged.

[0061] In one embodiment, along the axial direction of the second shaft 200, the length of the first shaft segment is L, and the length of the cut is L1, where L1 is greater than 1 / 5L but less than L. It is understood that when the unloading part 300 is a cut on the second shaft 200, a cut length L1 greater than 1 / 5L results in a longer axial groove length for the unloading part 300, thus achieving a better unloading effect on the expansion force of the interference fit. However, the length of the cut should be less than the axial length L of the first shaft segment to avoid the cut extending beyond the first shaft 100, thereby affecting the interference fit connection between the second shaft 200 and the first shaft 100. It also avoids the impact on the overall rigidity of the second shaft 200 due to an excessively long groove length, making the second shaft 200 less prone to bending or detachment, thus affecting the normal eccentric rotation of the shaft structure.

[0062] This application also proposes a scroll compressor, which is mainly used in vehicle air conditioning systems. The scroll compressor includes a shaft structure, a motor (not shown), an eccentric bushing 720, and a moving scroll 610. A first shaft 100 is connected to the motor rotor. The eccentric bushing 720 is fitted onto a second shaft 200. The moving scroll 610 is then connected to the second shaft 200 via the eccentric bushing 720. Thus, when the motor drives the first shaft 100 to rotate, it can drive the second shaft 200 to rotate eccentrically, thereby causing the moving scroll 610 to rotate horizontally. The specific structure of the shaft structure applied to the compressor is as described in the above embodiments. Since this scroll compressor adopts all the technical solutions of all the above embodiments, it also possesses all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0063] It should be noted that, in this application, the scroll compressor, in addition to the aforementioned component structures, also includes other components, such as a housing including a high-pressure housing 510 and a low-pressure housing 520, a stationary scroll 620 adapted to mesh with the moving scroll 610, an eccentric sleeve 720, and a moving scroll bushing 730, etc. Specifically, a scroll cavity (not shown) and a motor cavity (not shown) are formed inside the housing, wherein a motor is built into the motor cavity, and the moving scroll 610, the stationary scroll 620, the bearing 400, etc., are built into the scroll cavity. For details, see below. Figure 9As shown, the moving scroll 610 has an annular connecting flange 611 on its bottom surface away from the high-pressure housing 510. This connecting flange 611 forms a connecting groove 612, in which the eccentric sleeve 720 and the moving scroll bushing 730 are both contained and positioned. The first shaft segment 220 of the second shaft 200 is interference-fitted with the first shaft 100, and the second shaft 200 is eccentrically connected to the first shaft 100. The eccentric sleeve 720 is fitted onto the second shaft 200, and the second shaft segment 230 is eccentrically connected to the eccentric sleeve 720. One axial end of the eccentric sleeve 720 abuts against the bottom surface of the connecting groove 612. Meanwhile, since both the bearing 400 and the moving scroll 610 are rotating components, to reduce friction and prevent mutual wear between the bearing 400 and the moving scroll 610, a gap exists between the side of the connecting flange 611 away from the stationary scroll 620 and the end face of the bearing 400 facing the moving scroll 610.

[0064] Furthermore, a bracket 530 is sandwiched between the high-pressure housing 510 and the low-pressure housing 520. The motor is located on one side of the low-pressure housing 520, and the moving scroll 610 is located on one side of the high-pressure housing 510. Since the moving scroll 610 is eccentrically connected to the second shaft 200 through the eccentric sleeve 720, and the stationary scroll 620 is connected to the bracket 530, and the end of the first shaft 100 away from the moving scroll 610 is connected to the motor and can be driven to rotate by the motor, after the scroll compressor starts, the second shaft 200, the eccentric sleeve 720, and the moving scroll 610 can all rotate eccentrically around the central axis of the first shaft 100 under the drive of the motor rotor and the first shaft 100. The stationary scroll 620 is relatively stationary. Then, the moving scroll 610 can revolve and translate relative to the stationary scroll 620 under the drive of the first shaft 100 to form a compression chamber with a continuously changing volume. The compression of the fluid is achieved through the change of the compression chamber.

[0065] This application also proposes an air conditioning device, which includes core components such as a scroll compressor, a condenser (not shown), and an evaporator (not shown). Specifically, as... Figure 9As shown, an intake port (not shown) is provided on the low-pressure housing 520, and an exhaust port (not shown) is provided on the stationary scroll 620. An oil-gas separator 740, connected to the exhaust port, is also provided on one side of the exhaust port. The intake port is connected to the outlet of the evaporator of the air conditioning unit via a pipe, and the outlet of the oil-gas separator 740 is connected to the inlet of the condenser of the air conditioning unit via another pipe. In actual operation, the mixture of refrigerant and refrigeration oil is drawn into the interior of the low-pressure housing 520 (the low-pressure zone of the compressor) through the intake port, and further drawn into the compression chamber for compression. Then, it is discharged through the exhaust port of the stationary scroll 620 to the oil-gas separator 740 for oil-gas separation. Specifically, the separated refrigerant is discharged from the oil-gas separator 740 and continuously circulates between the scroll compressor, condenser, and evaporator to complete the entire heat exchange process. The separated refrigerant oil returns to the low-pressure housing 520 to lubricate the components built into the low-pressure housing 520, such as, but not limited to, the shaft structure and motor used in the compressor, and participates in the next cycle. The specific structure of the scroll compressor is as described in the above embodiment. Since this air conditioning unit adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0066] This application also proposes a vehicle equipped with the aforementioned air conditioning device. Regardless of model or size, the air conditioning device can be installed as long as its structure is suitable. Specifically, the vehicle includes a body and a front end, with a driver's cab for passenger seating located within the body. The air conditioning device is at least partially located in the front end of the vehicle. It should be noted that, to smoothly complete the entire cooling or heating cycle, the air conditioning device typically includes an air outlet assembly connected to the condenser. The air outlet of this assembly is connected to the space requiring temperature regulation, such as the driver's cab, allowing air that has undergone heat exchange with the refrigerant to be discharged into this space, thereby achieving the temperature regulation function of the air conditioning device for the driver's cab and other interior spaces of the vehicle. Since this vehicle adopts all the technical solutions of all the above embodiments, it also possesses all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0067] In this application, the specific type of vehicle is not limited. For example, the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy vehicle includes, but is not limited to, pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc. This embodiment does not impose any special restrictions on this.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A shaft structure applied to a compressor, characterized in that, include: A first shaft, wherein a fixing hole is formed on one end face of the first shaft, and the fixing hole is eccentrically positioned relative to the first shaft; and, The second shaft has one end inserted into the fixing hole, and the second shaft is interference-fitted with the fixing hole. The inner wall of the fixing hole and / or the circumferential surface of the portion of the second shaft that extends into the fixing hole are provided with an unloading part; The fixing hole has a thin wall surface and a thick wall surface opposite to the thin wall surface; in the radial direction, the distance from the thin wall surface to the outer peripheral surface of the first shaft is less than the distance from the thick wall surface to the outer peripheral surface of the first shaft; the unloading part is at least partially disposed facing the thin wall surface; The unloading part is a cut on the second shaft, and the cut is open to the bottom surface of the hole facing the fixing hole and to the thin wall surface. The cut includes a bottom surface and a side surface that are adjacent to each other. The bottom surface of the cut is arranged to face the bottom surface of the hole, and the side surface of the cut is arranged to face the thin wall surface.

2. The shaft structure applied to a compressor as described in claim 1, characterized in that, The side of the cut is flat.

3. The shaft structure applied to a compressor as described in claim 1, characterized in that, The cut side is an arc surface. The cross-section of the thin wall surface has an inward concave point that is closest to the outer peripheral surface of the first axis. The cut side has an outward convex point that is closest to the thin wall surface. On the same horizontal cross-section, the outward convex point, the inward concave point, the center point of the second axis, and the center point of the first axis are collinearly arranged.

4. The shaft structure applied to a compressor as described in claim 1, characterized in that, Along the axial direction of the second axis, the length of the portion of the second axis extending into the fixing hole is L, and the length of the cut is L1, where L1 is greater than 1 / 5L but less than L.

5. The shaft structure applied to a compressor as described in claim 1, characterized in that, The unloading section is an annular groove or an arc-shaped groove.

6. The shaft structure applied to a compressor as described in any one of claims 1 to 5, characterized in that, With the end face of the first shaft where the fixing hole is formed as the top surface, and the end face of the second shaft that extends into the fixing hole as the bottom surface; The unloading part is disposed on the inner wall of the fixing hole, and in the axial direction along the first axis, the distance between the centerline of the unloading part and the top surface is greater than the distance between the centerline of the unloading part and the bottom surface.

7. The shaft structure applied to a compressor as described in any one of claims 1 to 5, characterized in that, With the end face of the first shaft where the fixing hole is formed as the top surface, and the end face of the second shaft that extends into the fixing hole as the bottom surface; The unloading part is disposed on the circumferential surface of the portion of the second shaft that extends into the fixing hole, and in the axial direction along the first shaft, the distance between the centerline of the unloading part and the top surface is less than the distance between the centerline of the unloading part and the bottom surface.

8. The shaft structure applied to a compressor as described in any one of claims 1 to 5, characterized in that, The end face of the first shaft with the fixing hole is the top surface. The unloading part includes a first unloading part disposed on the inner wall of the fixing hole and a second unloading part disposed on the circumferential surface of the second shaft. Along the axial direction of the first shaft, the distance between the centerline of the first unloading part and the top surface is greater than the distance between the centerline of the second unloading part and the top surface.

9. A compressor, characterized in that, Includes the shaft structure applied to the compressor as described in any one of claims 1 to 8.

10. An air conditioning device, characterized in that, Includes the compressor as described in claim 9.

11. A vehicle, characterized in that, Includes the air conditioning unit as described in claim 10.

Images