Cross slip ring assembly for scroll compressor and scroll compressor

Abstract

The utility model relates to a cross slip ring assembly for a scroll compressor and the scroll compressor. The scroll compressor comprises a movable scroll piece and a fixed component. The cross-shaped sliding ring assembly comprises a sliding ring body, a cross-shaped sliding ring and a cross-shaped sliding ring, the key extends from the sliding ring body and is used for being matched with the first key groove of the movable scroll piece or the second key groove of the fixing component, the key comprises a key body and a wear-resisting element, the key body comprises a sliding surface, a mounting hole is formed in the sliding surface, and the wear-resisting element is arranged in the mounting hole. The wear-resistant element is mounted in the mounting hole in a manner of interference fit with the mounting hole in at least two spaced positions. The cross slip ring assembly provided by the utility model has low requirement on dimensional tolerance of the wear-resistant element, so that the wear-resistant element can be processed by a method except for machining, and the processing cost is reduced. In addition, an exhaust channel does not need to be additionally machined in the wear-resistant element, the machining procedures are reduced, and the machining cost is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a cross slip ring assembly for a scroll compressor, and further to a scroll compressor comprising the cross slip ring assembly. Background Art

[0002] This section provides background information related to the present disclosure which is not necessarily prior art.

[0003] A scroll compressor typically includes a sealed housing assembly, a main bearing assembly, a motor assembly, a scroll assembly (compression mechanism), and an Oldham assembly. The scroll assembly can generally include an orbiting scroll and a fixed scroll. The main bearing assembly can generally include a main bearing housing and a main bearing housed within the housing. The Oldham assembly can mate with the orbiting scroll and the fixed scroll, or with the orbiting scroll and the main bearing housing.

[0004] Figure 1 FIG. 1 shows a perspective schematic diagram of a cross slip ring assembly 100 ′ according to the related art. Figure 1 As shown, the Oldham slip ring assembly 100' includes a slip ring body 110' and a pair of first keys 120' and a pair of second keys 130' extending from the slip ring body 110'. When the Oldham slip ring assembly 100' is assembled in a scroll compressor, the first key 120' is used to mate with the orbiting scroll keyway of the scroll compressor's orbiting scroll. The second key 130' is used to mate with the fixed scroll keyway of the fixed scroll of the scroll compressor.

[0005] During the operation of the scroll compressor, the motor assembly drives the orbiting scroll, causing the orbiting scroll keyway of the orbiting scroll to slide back and forth linearly relative to the corresponding first key 120' of the cross ring assembly 100'. At the same time, the orbiting scroll causes the second key 130' of the cross ring assembly 100' to slide back and forth linearly along the fixed scroll keyway of the fixed scroll. The sliding direction of the second key 130' of the cross ring assembly 100' along the fixed scroll keyway of the fixed scroll is perpendicular to the sliding direction of the orbiting scroll keyway of the orbiting scroll relative to the first key 120' of the cross ring assembly 100'. The orbiting scroll revolves relative to the fixed scroll and cannot rotate on its own. Therefore, the cross ring assembly 100' is configured as an anti-rotation mechanism to prevent the orbiting scroll from rotating on its own while allowing the orbiting scroll to orbit relative to the fixed scroll in a translational manner.

[0006] During the process of the movable scroll keyway of the movable scroll member sliding back and forth linearly relative to the corresponding first key 120' of the cross ring assembly 100' and the second key 130' of the cross ring assembly 100' sliding back and forth linearly along the fixed scroll keyway of the fixed scroll member, the first key 120' and the second key 130' of the cross ring assembly 100' are prone to wear.

[0007] Therefore, in the related art, Figure 1 As shown, the Oldham slip ring assembly 100 ′ is further provided with wear-resistant elements 140 ′ on the first key 120 ′ and the second key 130 ′. Figure 2 FIG. 1 is a perspective schematic diagram showing a portion of a second key 130 ′ of an Oldham slip ring assembly 100 ′ according to the related art. Figure 3 The following is a perspective diagram of a wear-resistant element 140' according to the related art. Figures 1 to 3 The assembly of the wear-resistant element 140 ′ is described.

[0008] like Figures 1 to 3 As shown, the second key 130' includes a key body 131'. A mounting hole 133' is provided at the sliding surface 132' of the key body 131'. The wear-resistant element 140' is inserted into the mounting hole 133'. By providing the wear-resistant element 140' on the sliding surface 132' of the key body 131' of the second key 130', the wear of the key body 131' can be improved. The wear-resistant element 140' is interference fit with the mounting hole 133' to ensure that the wear-resistant element 140' can be firmly mounted in the mounting hole 133'. The interference between the wear-resistant element 140' and the mounting hole 133' cannot be too large, otherwise the wear-resistant element 140' cannot be assembled into the mounting hole 133'. The interference between the wear-resistant element 140' and the mounting hole 133' cannot be too small, otherwise it cannot be ensured that the wear-resistant element 140' can be firmly mounted in the mounting hole 133'. Therefore, the dimensional tolerance requirements for the wear-resistant element 140' are very high, making it impossible to meet these requirements without machining, which results in high processing costs. Furthermore, an exhaust passage (e.g., a specially added passage located in the center of the wear-resistant element 140' or an axial groove 141' located on the outer periphery of the wear-resistant element 140') must be machined into the wear-resistant element 140' to ensure that the wear-resistant element 140' can be smoothly pressed into the mounting hole 133'. This increases the number of processing steps and further increases processing costs. Utility Model Content

[0009] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0010] The purpose of the present invention is to solve or alleviate one or more of the above-mentioned technical problems.

[0011] Specifically, the present invention aims to provide an improved Oldham slip ring assembly that reduces the dimensional tolerance requirements for wear-resistant elements, enabling the wear-resistant elements to be machined using methods other than machining, thereby reducing processing costs. Furthermore, the wear-resistant elements do not require additional exhaust passages, reducing the number of machining steps and further reducing processing costs.

[0012] In a first aspect of the present invention, a cross ring assembly for a scroll compressor is provided, wherein the scroll compressor includes a movable scroll and a fixed component, and the cross ring assembly includes: a slip ring body; and a key, wherein the key extends from the slip ring body and is used to cooperate with a first keyway of the movable scroll or a second keyway of the fixed component, the key includes a key body and a wear-resistant element, the key body includes a sliding surface, wherein a mounting hole is provided at the sliding surface, and the wear-resistant element is installed in the mounting hole in a manner of interference fit with the mounting hole at at least two spaced-apart positions.

[0013] Because the interference fit positions are spaced apart, compared to the overall interference according to the related art or conventional overall interference, even if the local interference amount is appropriately increased, the wear-resistant element will not be unable to be assembled into the mounting hole. Therefore, the local interference amount at the local interference fit position can be appropriately increased (that is, the interference amount at the local interference position can be appropriately greater than the interference amount at the corresponding position in the overall interference scheme according to the related art or conventional). Therefore, in the case of local interference, the comprehensive fixing force / fixing degree of the wear-resistant element in the mounting hole is still equal to or even better than the comprehensive fixing force / fixing degree of the overall interference. Because the local interference amount at the local interference fit position can be appropriately increased, the dimensional tolerance requirements for the wear-resistant element are low. Therefore, the wear-resistant element can be processed using methods other than machining, reducing processing costs. In addition, at other positions between the local interference fit positions, the wear-resistant element and the mounting hole do not form an interference fit or are even spaced apart, so that an exhaust channel can be formed by assembly at these positions. Therefore, there is no need to additionally process the exhaust channel in the wear-resistant element, reducing the processing steps and further reducing processing costs.

[0014] Optionally, the wear-resistant element includes a wear-resistant body and at least two protrusions arranged on the periphery of the wear-resistant body, at the position of the protrusions, the wear-resistant element is interference fit with the mounting hole, and at the position between two adjacent protrusions, the wear-resistant element is spaced apart from the mounting hole.

[0015] Optionally, the protrusion extends from one axial end to the other axial end of the wear-resistant element. In this way, the comprehensive fixing force / fixing degree of the wear-resistant element in the mounting hole can be improved.

[0016] Optionally, the wear-resistant body and the mounting hole have the same shape. In this way, it is easy to fit the wear-resistant body into the mounting hole.

[0017] Optionally, the wear-resistant body and the mounting hole are both cylindrical, the outer diameter of the wear-resistant body is smaller than the inner diameter of the mounting hole, and the protrusion is a tooth-like protrusion protruding radially outward from the periphery of the wear-resistant body. The cylindrical mounting hole can facilitate machining the mounting hole on the sliding surface of the second key body.

[0018] Optionally, the wear-resistant element and the mounting hole have different shapes. In this way, the design flexibility of the wear-resistant element and / or the mounting hole can be increased.

[0019] Optionally, the mounting hole is cylindrical, the wear-resistant element is a prism, the wear-resistant element is interference fit with the mounting hole at at least two side edges of the prism, and the wear-resistant element is spaced apart from the mounting hole at the side surface of the wear-resistant element located between two adjacent side edges.

[0020] Optionally, the prism is a regular prism. In this way, an interference fit can be formed between the wear-resistant element and the mounting hole at multiple positions evenly spaced in the circumferential direction of the mounting hole, so as to obtain a comprehensive fixing force that is evenly distributed overall.

[0021] Optionally, the mounting hole is a prism, and the wear-resistant element is cylindrical.

[0022] Optionally, in the circumferential direction of the mounting hole, the area where the mounting hole and the wear-resistant element form an interference fit is less than 50% of the inner circumferential area of ​​the mounting hole. In this way, the dimensional tolerance requirement for the wear-resistant element can be significantly reduced.

[0023] In a second aspect of the present invention, a scroll compressor is provided, comprising any one of the above-mentioned Oldham slip ring assemblies.

[0024] Since the scroll compressor includes any of the above-mentioned cross-slip ring assemblies, the scroll compressor also has the above-mentioned beneficial effects.

[0025] In summary, the Cross-ring assembly provided by the present invention reduces the dimensional tolerance requirements for the wear-resistant element, enabling the wear-resistant element to be processed using methods other than machining, thereby reducing processing costs. Furthermore, the wear-resistant element does not require additional exhaust passages, reducing the number of processing steps and further reducing processing costs.

[0026] Further areas of applicability will become apparent from the description provided herein.The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings provided herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0028] Figure 1 A perspective schematic diagram of a cross slip ring assembly according to the related art is shown;

[0029] Figure 2 A perspective schematic diagram showing a portion of a second key of an Oldham slip ring assembly according to the related art;

[0030] Figure 3 shows a perspective schematic diagram of a wear-resistant element according to the related art;

[0031] Figure 4 A longitudinal cross-sectional view of a scroll compressor according to a preferred embodiment of the present invention is shown;

[0032] Figure 5 A perspective schematic diagram of a cross ring assembly according to a first embodiment of the present utility model is shown;

[0033] Figure 6 A perspective schematic diagram showing a portion of the second key of the Oldham slip ring assembly according to the first embodiment of the present utility model is shown;

[0034] Figure 7 A perspective schematic diagram of a wear-resistant element of a second key of an Oldham slip ring assembly according to a first embodiment of the present utility model is shown;

[0035] Figure 8 A perspective schematic diagram of a cross ring assembly according to a second embodiment of the present utility model is shown;

[0036] Figure 9 A perspective schematic diagram showing a portion of a second key of an Oldham slip ring assembly according to a second embodiment of the present invention; and

[0037] Figure 10 A three-dimensional schematic diagram of a wear-resistant element of a second key of an Oldham slip ring assembly according to a second embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following detailed description of the present invention is for illustrative purposes only and is by no means intended to limit the present invention and its applications or uses.

[0039] The utility model provides a cross slip ring assembly for a scroll compressor and a scroll compressor comprising the cross slip ring assembly. Figure 4A longitudinal cross-sectional view of a scroll compressor 10 according to a preferred embodiment of the present invention is shown. Figure 4 The main components of a scroll compressor 10 according to a preferred embodiment of the present invention will be described.

[0040] like Figure 4 As shown, the scroll compressor 10 is, for example, a vertical scroll compressor. In other embodiments not shown in the present invention, the scroll compressor 10 may also be a horizontal scroll compressor. The scroll compressor 10 primarily includes an Oldham ring assembly 100, a scroll assembly (compression mechanism) 200, a sealed housing assembly 300, a main bearing assembly 400, and a motor assembly 500.

[0041] The housing assembly 300 houses the other components of the scroll compressor 10. The housing assembly 300 may include a housing 310, an end cover 320, and a base 330. The housing 310 may be generally cylindrical. The end cover 320 is disposed at the upper end of the housing 310. The base 330 is disposed at the lower end of the housing 310. The main bearing assembly 400 may be attached to the housing 310 of the housing assembly 300. The main bearing assembly 400 includes a main bearing housing and a main bearing housed within the main bearing housing. The motor assembly 500 may include a stator 510, a rotor 520, and a drive shaft 530. The stator 510 may be press-fitted to the housing 310 of the housing assembly 300. The rotor 520 may be press-fitted to the drive shaft 530. The drive shaft 530 may be rotatably driven by the rotor 520 and may be rotatably supported within the main bearing assembly 400. The drive shaft 530 may include an eccentric crank pin 531.

[0042] The scroll assembly 200 can generally include an orbiting scroll 210 and a fixed scroll 220. The orbiting scroll 210 can include an orbiting scroll end plate 211, an orbiting scroll spiral wrap 212 disposed on the upper surface of the orbiting scroll end plate 211, and a cylindrical hub 213 protruding downward from the lower surface of the orbiting scroll end plate 211. The hub 213 can include an inner hole in which a crank pin 531 of a drive shaft 530 is drivingly disposed to drive the orbiting scroll 210. The fixed scroll 220 includes a fixed scroll end plate 221, a fixed scroll spiral wrap 222 disposed on the lower surface of the fixed scroll end plate 221, and an exhaust port 223 disposed approximately at the center of the fixed scroll end plate 221.

[0043] The Oldham ring assembly 100 is used to cooperate with the movable scroll 210 and the fixed scroll 220 (as an example of a “fixed member”) to prevent the movable scroll 210 from rotating.

[0044] Figure 5 FIG. 1 shows a perspective view of a cross ring assembly 100 according to a first embodiment of the present invention. Figure 5As shown, the Cross slip ring assembly 100 includes a slip ring body 110, a first key 120 for cooperating with the movable scroll keyway (i.e., the "first keyway") of the movable scroll member 210, and a second key 130 for cooperating with the fixed scroll keyway (as an example of the "second keyway") of the fixed scroll member 220.

[0045] like Figure 5 As shown, the slip ring body 110 is formed into a non-standard annular shape. Preferably, the slip ring body 110 is axisymmetric. The slip ring body 110 includes a first end surface 111 and a second end surface 112 opposite the first end surface 111. When the Oldham slip ring assembly 100 is assembled in the scroll compressor 10, the Oldham slip ring assembly 100 is located between the scroll assembly 200 and the main bearing assembly 400, with the first end surface 111 of the slip ring body 110 facing the scroll assembly 200 and the second end surface 112 facing the main bearing assembly 400.

[0046] like Figure 5As shown, the Cross ring assembly 100 includes a pair of opposing first keys 120 and a pair of opposing second keys 130. The line connecting the two opposing first keys 120 and the line connecting the two opposing second keys 130 can be substantially perpendicular. The first key 120 and the second key 130 both extend from the ring body 110. Specifically, in this embodiment, the first key 120 and the second key 130 both extend from the ring body 110 in a direction perpendicular to the plane in which the ring body 110 is located. More specifically, the first key 120 and the second key 130 both extend from the first end surface 111 of the ring body 110 in a direction perpendicular to the plane in which the ring body 110 is located. The first key 120 is used to be inserted into the orbiting scroll keyway of the orbiting scroll 210 to cooperate with the orbiting scroll keyway. The second key 130 is used to be inserted into the fixed scroll keyway of the fixed scroll 220 to cooperate with the fixed scroll keyway. The first key 120 and the second key 130 both include a key body. Specifically, the first key 120 includes a first key body 121; the second key 130 includes a second key body 131. The first key body 121 and the second key body 131 each include two side surfaces that are opposite in the circumferential direction of the slip ring body 110. For example, the first key body 121 includes two first side surfaces 122 that are opposite in the circumferential direction of the slip ring body 110; the second key body 131 includes two second side surfaces 132 that are opposite in the circumferential direction of the slip ring body 110. When the slip ring assembly 100 is assembled in the scroll compressor 10 and the first key 120 and the second key 130 are respectively inserted into the corresponding orbiting scroll keyway in the orbiting scroll 210 and the corresponding fixed scroll keyway in the fixed scroll 220, the first side surface 122 of the first key body 121 and the second side surface 132 of the second key body 131 face the keyway walls of the corresponding orbiting scroll keyway and the fixed scroll keyway, respectively. Therefore, the first side surface 122 constitutes the sliding surface of the first key body 121, that is, the first sliding surface, that is, the first working surface, and the second side surface 132 constitutes the sliding surface of the second key body 131, that is, the second sliding surface, that is, the second working surface. Among them, one of the two first sliding surfaces and one of the two second sliding surfaces are located on the force-bearing side and are force-bearing side sliding surfaces. In addition, since the movable scroll 210 is located between the fixed scroll 220 and the Cross ring assembly 100, the fixed scroll 220 is relatively far away from the Cross ring assembly 100. Therefore, the extension height of the second key 130 is greater than the extension height of the first key 120. Specifically, the second key 130 also includes a boss 134 located between the second key body 131 and the slip ring body 110. The boss 134 can be a generally trapezoidal boss. When the second key 130 is inserted into the fixed scroll key groove of the fixed scroll 220 , only the second key body 131 of the second key 130 is inserted into the fixed scroll key groove.The trapezoidal boss 134 can increase the extension height of the second key 130 so that the second key 130 can be inserted into the fixed scroll keyway of the fixed scroll member 220 . On the other hand, the trapezoidal boss 134 can improve the strength of the second key 130 .

[0047] In order to reduce the wear of the first key body 121 of the first key 120 and the second key body 131 of the second key 130 of the cross ring assembly 100, a wear-resistant element 140 is provided on the first sliding surface of the first key body 121 of the first key 120 and the second sliding surface of the second key body 131 of the second key 130. Preferably, the wear-resistant element 140 is only provided on the sliding surface of the force-bearing side. The wear-resistant element 140 has a wear-resistant sliding surface that slides with the keyway wall of the corresponding keyway. The wear-resistant sliding surface is substantially parallel to the corresponding first sliding surface or the second sliding surface. The wear-resistant element 140 can be made of a material that is more wear-resistant than the first key body 121 and the second key body 131 as a whole or at least the wear-resistant sliding surface of the wear-resistant element 140.

[0048] Figure 6 FIG. 1 is a perspective schematic diagram showing a portion of the second key 130 of the Oldham slip ring assembly 100 according to the first embodiment of the present invention. Figure 7 The third embodiment of the present invention is a schematic diagram of the wear-resistant element 140 of the second key 130 of the cross ring assembly 100. Figures 5 to 7 The assembly of the second key 130 and the wear-resistant element 140 of the Oldham slip ring assembly 100 according to the first embodiment of the present invention is described in detail. It is understood that the following description of the second key 130 and the wear-resistant element 140 is also applicable to the first key 120 and the wear-resistant element 140.

[0049] like Figures 5 to 7 As shown, a mounting hole 133 is provided at the second sliding surface of the second key body 131 of the second key 130. Preferably, the mounting hole 133 is a cylindrical mounting hole to facilitate processing of the mounting hole 133. Of course, the mounting hole 133 can also be a mounting hole of any other suitable shape. For example, the mounting hole 133 can be in the shape of a prism (for example, a triangular prism, a quadrangular prism (for example, a cube)), a triangular pyramid, a cone, or a truncated cone. The mounting hole 633 can also be an irregular shape to increase design diversity. The wear-resistant element 140 is installed in the mounting hole 133 in a manner of interference fit with the mounting hole 133 at at least two spaced-apart positions. That is, a local interference fit is formed between the wear-resistant element 140 and the mounting hole 133, and there are at least two discontinuous interference fit positions between the wear-resistant element 140 and the mounting hole 133. On both sides of the interference fit position, there is a situation where the wear-resistant element 140 and the mounting hole 133 do not interfere with each other or are even spaced apart.

[0050] Because the interference fit locations are spaced apart, even if the local interference is appropriately increased, the wear-resistant element 140 will not be unable to fit into the mounting hole 133, compared to the overall interference fit according to the related art or conventional methods. Therefore, the local interference at the local interference fit location can be appropriately increased (i.e., the interference at the local interference location can be appropriately greater than the interference at the corresponding location in the overall interference fit according to the related art or conventional methods). This ensures that, even with the local interference fit, the overall securing force / degree of the wear-resistant element 140 in the mounting hole 133 is equal to or even superior to the overall securing force / degree of the overall interference fit. Because the local interference at the local interference fit location can be appropriately increased, the dimensional tolerance requirements for the wear-resistant element 140 are reduced. In particular, in the circumferential direction of the mounting hole 133, the area where the mounting hole 133 and the wear-resistant element 140 form an interference fit can be less than 50% of the inner circumference of the mounting hole 133, significantly reducing the dimensional tolerance requirements for the wear-resistant element 140. Because the wear-resistant element 140 has low dimensional tolerance requirements, it can be manufactured using methods other than machining, such as injection molding, thereby reducing manufacturing costs. Furthermore, at locations between the locations where the partial interference fit occurs, the wear-resistant element 140 and the mounting hole 133 do not form an interference fit, or are even spaced apart. This allows the exhaust passage 150 to be formed at these locations through assembly. Consequently, there is no need to additionally machine the exhaust passage in the wear-resistant element 140, reducing the number of manufacturing steps and further reducing manufacturing costs.

[0051] Specifically, in the first embodiment of the present invention, Figure 6 and Figure 7As shown, the wear-resistant element 140 includes a wear-resistant body 141 and at least two (for example, four) protrusions (tooth-like protrusions) 142 provided on the periphery of the wear-resistant body 141. The wear-resistant body 141 and the mounting hole 133 have the same, i.e., consistent or corresponding, shape to facilitate the assembly of the wear-resistant body 141 into the mounting hole 133. For example, in this embodiment, the wear-resistant body 141 and the mounting hole 133 are both cylindrical, but the outer diameter of the wear-resistant body 141 is smaller than the inner diameter of the mounting hole 133. The protrusions 142 are tooth-like protrusions that protrude radially outward from the periphery of the wear-resistant body 141. Preferably, at least two protrusions 142 are evenly distributed in the circumferential direction of the wear-resistant body 141. At the position of the protrusions 142, the wear-resistant element 140 is interference fit with the mounting hole 133. At the position between two adjacent protrusions 142, because the outer diameter of the wear-resistant body 141 is smaller than the inner diameter of the mounting hole 133, the wear-resistant element 140 is spaced apart from the mounting hole 133. Since the wear-resistant element 140 is interference-fitted with the mounting hole 133 only at the position of the protrusions 142 and is spaced apart from the mounting hole 133 at the position between adjacent protrusions 142, the interference at the position of the protrusions 142 can be appropriately increased (i.e., the interference at the position of the protrusions 142 can be appropriately greater than the interference at the corresponding position in the overall interference scheme according to the related art or conventional). On the one hand, despite the local interference, the comprehensive fixing force / fixing degree of the wear-resistant element 140 in the mounting hole 133 can still be equal to or even better than the comprehensive fixing force / fixing degree of the overall interference scheme. On the other hand, the dimensional tolerance requirements for the wear-resistant element 140 can be reduced, allowing the wear-resistant element 140 to be processed using methods other than machining, such as injection molding, thereby reducing processing costs. In addition, the wear-resistant element 140 is spaced apart from the mounting hole 133 at positions between adjacent protrusions 142, so that exhaust channels 150 can be formed at these positions. There is no need to additionally machine exhaust channels in the wear-resistant element 140, which reduces the number of machining steps and further reduces machining costs.

[0052] Preferably, if Figure 7 As shown, the protrusion 142 of the wear-resistant element 140 extends from one axial end to the other axial end of the wear-resistant element 140. This improves the overall securing force / degree of the wear-resistant element 140 in the mounting hole 133. It should be noted that the "axial direction" of the wear-resistant element 140 referred to herein refers to a direction generally perpendicular to the wear-resistant sliding surface of the wear-resistant body 141 of the wear-resistant element 140. When the wear-resistant element 140 is installed in the mounting hole 133, the "axial direction" of the wear-resistant element 140 is generally perpendicular to the plane of the opening of the mounting hole 133.

[0053] The wear-resistant element and the mounting hole may also have different, ie, inconsistent or non-corresponding shapes, so as to increase the design flexibility of the wear-resistant element and / or the mounting hole.

[0054] Figure 8 A three-dimensional schematic diagram of a cross ring assembly 600 according to a second embodiment of the present invention is shown. Figure 9 FIG. 1 is a perspective schematic diagram showing a portion of a second key 630 of an Oldham slip ring assembly 600 according to a second embodiment of the present invention. Figure 10 A perspective view of the wear-resistant element 640 of the second key 630 of the cross ring assembly 600 according to the second embodiment of the present invention is shown. Figures 8 to 10 The Oldham slip ring assembly 600 according to the second embodiment of the present invention is described in detail.

[0055] like Figures 8 to 10 As shown, the cross slip ring assembly 600 according to the second embodiment of the present invention is Figures 5 to 7 The cross ring assembly 100 shown in FIG is substantially the same. Specifically, the cross ring assembly 600 according to the second embodiment of the present invention also includes a slip ring body 610, a first key 620 for cooperating with the movable scroll keyway of the movable scroll 210, and a second key 630 for cooperating with the fixed scroll keyway of the fixed scroll 220. The slip ring body 610 has a first end surface 611 and a second end surface 612 opposite to the first end surface 611. The first key 620 and the second key 630 both extend from the first end surface 611 of the slip ring body 610. The first key 620 includes a first key body 621, and the first key body 621 includes a first sliding surface 622. The second key 630 includes a second key body 631, and the second key body 631 includes a second sliding surface 632. A first mounting hole is provided at the first sliding surface 622, and a second mounting hole 633 is provided at the second sliding surface 632. The Oldham slip ring assembly 600 further includes a wear-resistant element 640 mounted in the first and second mounting holes 633. The wear-resistant element 640 is installed in the first and second mounting holes 633 in an interference fit at at least two spaced-apart locations. In other words, a localized interference fit is formed between the wear-resistant element 640 and the first and second mounting holes 633. There are at least two discontinuous interference fit locations between the wear-resistant element 640 and the first and second mounting holes 633, and on both sides of the interference fit locations, there is a non-interference fit between the wear-resistant element 640 and the first and second mounting holes 633, or even a spaced-apart location.

[0056] In the second embodiment, different from the first embodiment, the wear-resistant element 640 and the first mounting hole and the second mounting hole 633 have different, i.e., inconsistent or non-corresponding shapes to increase the design flexibility of the wear-resistant element 640 and / or the first mounting hole and the second mounting hole 633.

[0057] For example, Figures 8 to 10As shown, the second mounting hole 633 on the second sliding surface 632 of the second key body 631 of the second key 630 is a cylindrical mounting hole, which facilitates machining the second mounting hole 633 on the second sliding surface 632 of the second key body 631. The wear-resistant element 640 mounted in the second mounting hole 633 is a prism. The wear-resistant element 640 has an interference fit with the second mounting hole 633 at at least two side edges 641 of the prism. On the side surface 642 of the wear-resistant element 640 located between two adjacent side edges 641, the wear-resistant element 640 does not form an interference fit with the second mounting hole 633, or is even spaced apart from the second mounting hole 633. Therefore, a partial interference fit is formed between the wear-resistant element 640 and the second mounting hole 633. Since the wear-resistant element 640 is only interference fit with the second mounting hole 633 at the position of the side edge 641, and is spaced from the second mounting hole 633 at the side 642 located between two adjacent side edges 641, the interference amount at the position of the side edge 641 can be appropriately increased (that is, the interference amount at the position of the side edge 641 can be appropriately larger than the interference amount at the corresponding position according to the relevant technology or the conventional overall interference scheme). On the one hand, in the case of local interference, the comprehensive fixing force / fixing degree of the wear-resistant element 640 in the second mounting hole 633 can still be equal to or even better than the comprehensive fixing force / fixing degree of the overall interference. On the other hand, the dimensional tolerance requirements for the wear-resistant element 640 can be reduced, so that methods other than machining, such as injection molding, can be used to process the wear-resistant element 640, thereby reducing processing costs. In addition, at the position of the side 642, the wear-resistant element 640 does not form an interference fit with the second mounting hole 633 or is even separated from the second mounting hole 633, so that an exhaust channel 650 can be formed by assembly between the wear-resistant element 640 and the second mounting hole 633 at the side 642, without the need to additionally process the exhaust channel in the wear-resistant element 640, thereby reducing the processing steps and further reducing the processing cost.

[0058] Preferably, the wear-resistant element 640 can be formed as a regular prism, such as a regular hexagonal prism, so that an interference fit is formed between the wear-resistant element 640 and the mounting hole (such as the second mounting hole 633) at multiple positions evenly spaced in the circumferential direction of the mounting hole to obtain a comprehensive fixing force that is evenly distributed overall.

[0059] It should be noted that although in this embodiment, the first and second mounting holes 633 are shown as cylindrical holes, and the wear-resistant element 640 is shown as a prism, the shapes of the first and second mounting holes 633 and the wear-resistant element 640 are not limited to this. For example, at least one of the first and second mounting holes 633 can be a prism, while the corresponding wear-resistant element 640 can be cylindrical. For another example, the mounting holes and the wear-resistant element 640 can have different irregular shapes. This is sufficient as long as the mounting holes and the wear-resistant element 640 have an interference fit at at least two spaced-apart locations.

[0060] In addition, it should be noted that although in the first and second embodiments described above, the Oldham slip ring assembly 100 / 600 is shown and described as being in cooperation with the movable scroll 210 and the fixed scroll 220, in other embodiments not shown in the present invention, the Oldham slip ring assembly 100 / 600 can also be used to cooperate with the movable scroll 210 and the main bearing seat of the main bearing assembly 400 (as another example of a "fixed member"). When the Oldham slip ring assembly 100 / 600 is used to cooperate with the movable scroll 210 and the main bearing seat, the first key 120 / 620 and the second key 130 / 630 of the Oldham slip ring assembly 100 / 600 can extend from the slip ring body 110 / 610 in opposite directions. Specifically, the first key 120 / 620 of the Oldham assembly 100 / 600 can extend from the first end surface 111 / 611 for insertion into the orbiting scroll keyway of the orbiting scroll 210; the second key 130 / 630 of the Oldham assembly 100 / 600 can extend from the second end surface 112 / 612 opposite to the first end surface 111 / 611 for insertion into the main bearing seat keyway (as another example of a "second keyway") of the main bearing seat. In addition, when the Oldham assembly 100 / 600 is used to cooperate with the orbiting scroll 210 and the main bearing seat, the first key 120 / 620 and the second key 130 / 630 can have the same extension height.

[0061] In summary, since the positions where the interference fit is formed between the wear-resistant element and the mounting hole are spaced apart, compared with the overall interference according to the related art or conventional method, even if the local interference amount is appropriately increased, the wear-resistant element will not be unable to be assembled into the mounting hole. Therefore, the local interference amount at the local interference fit position can be appropriately increased (that is, the interference amount at the local interference position can be appropriately greater than the interference amount at the corresponding position in the overall interference scheme according to the related art or conventional method), so that in the case of local interference, the comprehensive fixing force / fixing degree of the wear-resistant element in the mounting hole is still equal to or even better than the comprehensive fixing force / fixing degree of the overall interference. Since the local interference amount at the local interference fit position can be appropriately increased, the dimensional tolerance requirements for the wear-resistant element are low. Therefore, the wear-resistant element can be processed by methods other than machining, which reduces processing costs. In addition, at other positions between the positions of local interference fit, the wear-resistant element and the mounting hole do not form an interference fit or are even separated from each other, so that an exhaust channel can be formed by assembly at these positions. Therefore, there is no need to additionally process the exhaust channel in the wear-resistant element, which reduces the processing steps and further reduces the processing cost.

[0062] The foregoing description of the embodiments has been provided for the purpose of illustration and description. These descriptions are not intended to be exhaustive or to limit the present disclosure. The individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in selected embodiments even if not specifically shown or described. The individual elements or features of a particular embodiment can also be changed in many ways. Such changes should not be considered to be contrary to the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims

1. A cross ring assembly for a scroll compressor, the scroll compressor comprising a movable scroll and a fixed member, the cross ring assembly comprising: Slip ring body; as well as a key extending from the slip ring body and adapted to engage with the first keyway of the movable scroll member or the second keyway of the fixed component, the key comprising a key body and a wear-resistant element, the key body comprising a sliding surface, It is characterized in that a mounting hole is provided on the sliding surface, and the wear-resistant element is installed in the mounting hole in a manner of interference fit with the mounting hole at at least two spaced-apart positions.

2. The cross slip ring assembly according to claim 1, characterized in that: The wear-resistant element includes a wear-resistant body and at least two protrusions arranged on the periphery of the wear-resistant body. At the positions of the protrusions, the wear-resistant element is interference fit with the mounting hole, and at the position between two adjacent protrusions, the wear-resistant element is spaced apart from the mounting hole.

3. The cross ring assembly according to claim 2, characterized in that: The protrusion extends from one axial end to the other axial end of the wear-resistant element.

4. The cross slip ring assembly according to claim 2, characterized in that: The wear-resistant body and the mounting hole have the same shape.

5. The cross slip ring assembly according to claim 4, characterized in that: The wear-resistant body and the mounting hole are both cylindrical, the outer diameter of the wear-resistant body is smaller than the inner diameter of the mounting hole, and the protrusion is a tooth-shaped protrusion protruding radially outward from the periphery of the wear-resistant body.

6. The cross slip ring assembly according to claim 1, characterized in that: The wear-resistant element and the mounting hole have different shapes.

7. The cross ring assembly according to claim 6, characterized in that: The mounting hole is cylindrical, and the wear-resistant element is a prism. At at least two side edges of the prism, the wear-resistant element is interference fit with the mounting hole, and at the side surface of the wear-resistant element located between two adjacent side edges, the wear-resistant element is spaced apart from the mounting hole.

8. The cross ring assembly according to claim 7, characterized in that: The prism is a regular prism.

9. The cross slip ring assembly according to any one of claims 1 to 8, characterized in that: In the circumferential direction of the mounting hole, an area where the mounting hole and the wear-resistant element form an interference fit is less than 50% of an inner circumferential area of ​​the mounting hole.

10. A scroll compressor, characterized in that: The scroll compressor includes the Oldham ring assembly according to any one of claims 1 to 9.

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