Crankshaft assembly, compressor and vehicle

Abstract

The crankshaft assembly comprises a crankshaft and a crank pin, a pin hole is formed in the first end of the crankshaft, a positioning hole is formed in the second end of the crankshaft, the positioning hole extends in the axial direction of the crankshaft and penetrates through the end face of the second end to form a hole opening, and the positioning hole is formed in the center of the crankshaft and communicates with the pin hole; in the assembling process, the positioning arc line can be obtained from the second end of the crankshaft through the hole opening, the connecting line of the circle center of the positioning arc line and the axis of the crankshaft is determined, and therefore the rotor balancing weight can be positioned according to the preset angle with the connecting line as the reference datum, and the installation angle is ensured. The positioning hole is communicated with the pin hole, so that in the press-fitting process of the crank pin, pressure in the pin hole is balanced, needed press-fitting force is reduced, the problems that press-fitting of the crank pin is difficult and popping risks exist are effectively solved, and the press-fitting process is more stable. Assembly positioning and subsequent detection are simplified, and the positioning accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a crankshaft assembly, a compressor and a vehicle. BACKGROUND

[0002] In an electric scroll compressor, one end of a crankshaft is inserted into a cavity in the middle of a rotor, and the other end of the crankshaft is provided with an eccentric pin hole, and a crank pin is press-fitted in the eccentric pin hole. The crankshaft is connected to a scroll through a crank pin and an eccentric sleeve to realize power transmission. In order to meet the dynamic balance requirement, counterweights are assembled at both ends of the rotor, and the relative angle of the rotor counterweight and the scroll must be considered during assembly.

[0003] In the related art, the counterweight and the crank pin are positioned by positioning tools to determine the installation angle. The positioning is difficult, and the tool structure and operation are complex. In actual assembly, during the press-fitting of the crank pin, the pressure in the pin hole increases, and a large press-fitting force is required for press-fitting the crank pin. After press-fitting is completed, there is a risk of ejection of the crank pin, which affects the positioning accuracy of the counterweight in subsequent assembly. Practical new type content

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a crankshaft assembly which facilitates positioning of the rotor counterweight assembly angle and improves positioning accuracy. The present application also provides a compressor and a vehicle having the crankshaft assembly.

[0005] In a first aspect, the crankshaft assembly of the present application comprises a crankshaft and a crank pin, the crankshaft has a first end and a second end at both ends of the crankshaft along the axial direction of the crankshaft, wherein

[0006] The first end of the crankshaft is provided with a pin hole, the pin hole extends along the axial direction of the crankshaft and is eccentrically arranged relative to the axis of the crankshaft, the pin hole penetrates the end face of the first end, one end of the crank pin is located in the pin hole, and the other end of the crank pin is exposed to the first end of the crankshaft;

[0007] The second end of the crankshaft is provided with a positioning hole, the positioning hole extends along the axial direction of the crankshaft, the positioning hole penetrates the end face of the second end to form an aperture, the positioning hole is located at the center of the crankshaft and communicates with the pin hole, the communication part of the positioning hole and the pin hole forms a positioning arc line, along the axial direction of the crankshaft, at least part of the projection of the positioning arc line on the end face of the second end is located in the aperture, and the positioning arc line is used for angle positioning of a rotor assembly from the second end.

[0008] According to the crankshaft assembly provided by the embodiment of the present application, the at least partial arc segment of the end face of the second end of the positioning arc line in the orthogonal projection of the crankshaft is located in the orifice of the positioning hole in the second end, so that the positioning arc line can be conveniently obtained from the second end of the crankshaft through the orifice during assembly, and the line connecting the center of the positioning arc line and the axis of the crankshaft can be determined through the positioning arc line, thereby the rotor balance weight can be positioned at a preset angle with the line as a reference datum, so that the installation angle is ensured. Moreover, the communication between the positioning hole and the pin hole balances the pressure in the pin hole during the press-fitting process, and the required press-fitting force is reduced, thereby effectively solving the problems of difficult press-fitting and the risk of ejection of the crank pin, and making the press-fitting process more stable. Therefore, the compressor adopting the crankshaft assembly provided by the present application does not need to be provided with another tool for positioning during the assembly process of the rotor and the balance weight, and the positioning of the balance weight is not affected by the stability of the press-fitting of the crank pin, and the assembly angle can be conveniently detected after assembly, so that the assembly positioning and subsequent detection are simplified, and the accuracy of positioning is ensured.

[0009] According to the crankshaft assembly provided by some embodiments of the present application, the positioning hole comprises a first hole segment and a second hole segment extending along the axial direction of the crankshaft, one end of the first hole segment is communicated with the pin hole to form the positioning arc line, and the other end of the first hole segment is communicated with the orifice of the second hole segment, and the hole diameter of the second hole segment is greater than the hole diameter of the first hole segment at the positioning arc line.

[0010] According to the crankshaft assembly provided by some embodiments of the present application, the hole diameter of the first hole segment gradually decreases in the direction from the second end of the crankshaft to the first end.

[0011] According to the crankshaft assembly provided by some embodiments of the present application, the pin hole comprises an installation hole segment and a communication hole segment coaxially extending along the axial direction of the crankshaft, one end of the communication hole segment is communicated with the positioning hole to form the positioning arc line, and the installation hole segment extends from the end face of the first segment of the crankshaft to the other end of the communication hole segment, and the hole diameter of the installation hole segment is greater than the hole diameter of the communication hole segment at the positioning arc line.

[0012] According to the crankshaft assembly provided by some embodiments of the present application, the hole diameter of the communication hole segment gradually decreases in the direction from the first end of the crankshaft to the second end.

[0013] According to the crankshaft assembly provided by some embodiments of the present application, the crankshaft is further provided with a side hole extending from the peripheral wall of the crankshaft and communicated with the positioning hole.

[0014] According to the crankshaft assembly provided by some embodiments of the present application, the number of the side holes is multiple, and at least two of the multiple second flow guide holes are spaced apart in the circumferential direction of the crankshaft; and / or, at least two of the multiple second flow guide holes are spaced apart in the axial direction of the crankshaft.

[0015] In a second aspect, the compressor according to an embodiment of the present application comprises a rotor assembly and the crankshaft assembly according to the first aspect, the rotor assembly comprises a rotor and a counterweight, the rotor is coaxially sleeved at the second end of the crankshaft, the counterweight is connected to the rotor, the counterweight is provided with a positioning structure, and the positioning structure is arranged at a set angle relative to the line connecting the center of the positioning arc and the axis of the crankshaft.

[0016] The compressor according to an embodiment of the present application has at least the following beneficial effects: in the process of assembling the rotor and the counterweight, the compressor with the crankshaft assembly according to the present application can obtain the positioning arc as a reference through the orifice at the second end of the crankshaft, realize the positioning of the installation angle of the counterweight, and does not need to additionally arrange a tooling for positioning. Moreover, the positioning of the counterweight is not affected by the stability of the press fitting of the crank pin, which simplifies the positioning mode, ensures the accuracy of the positioning, meets the dynamic balance requirement of the compressor, and is beneficial to improving the stability and assembly efficiency of the compressor.

[0017] The compressor according to some embodiments of the present application, the counterweight has a positioning edge extending in the radial direction of the crankshaft, and the positioning edge is at a set angle relative to the line.

[0018] In a third aspect, the vehicle according to an embodiment of the present application comprises the compressor according to the second aspect, which is beneficial to improving the stability of the refrigeration system of the vehicle and improving the use experience.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a sectional view of a crankshaft assembly according to an embodiment of the present application;

[0021] Figure 2 FIG. 2 is a bottom view of the crankshaft assembly shown in FIG. 1; Figure 1 FIG. 3 is a sectional view of a crankshaft according to another embodiment of the present application;

[0022] Figure 3 FIG. 4 is a simplified schematic view of angle positioning of a positioning edge of a counterweight by a line L obtained by taking a positioning arc as a reference;

[0023] Figure 4 FIG. 5 is a sectional view of a crankshaft according to another embodiment of the present application;

[0024] Figure 5 FIG. 6 is a structural schematic view of a crankshaft according to another embodiment of the present application;

[0025] Figure 6 FIG. 7 is a sectional view of a crankshaft according to still another embodiment of the present application;

[0026] Figure 7 The schematic view of the positioning angle of the counterweight of the compressor of an embodiment of the present application, wherein only part of the structure of the compressor is shown, such as the crankshaft, the rotor, and the counterweight.

[0027] Reference signs:

[0028] Crank pin 100;

[0029] Crankshaft 200; first end 210; second end 220;

[0030] Pin hole 230; mounting hole section 231; communication hole section 232;

[0031] Positioning hole 240; first hole section 241; second hole section 242; hole opening 243;

[0032] Positioning arc 250;

[0033] Side hole 260;

[0034] Rotor 300;

[0035] Counterweight 400; positioning edge 410;

[0036] Included angle α; connecting line L. DETAILED DESCRIPTION

[0037] The concept and the resulting technical effects of the present application will be described below in conjunction with embodiments so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In the description of the embodiments of the present application, if the orientation description such as “up”, “down”, “front”, “back”, “left”, “right” and the like is described, the orientation or position relationship shown based on the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or the apparatus must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the embodiments of the present application, if a certain feature is referred to as being "provided", "fixed", "connected", "installed" to another feature, it can be directly provided, fixed, connected, installed to the other feature or indirectly provided, fixed, connected, installed to the other feature. In the description of the embodiments of the present application, if "several" is referred to, it means more than one, if "multiple" is referred to, it means more than two, if "greater than", "less than", "more than" is referred to, it should be understood as not including the number itself, if "and the like", "and the following", "and the like" are referred to, it should be understood as including the number itself. If "first", "second" is referred to, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0040] The crankshaft assembly of the embodiments of the present application can facilitate the positioning of the rotor weight block assembly angle, and can improve the positioning accuracy and the installation stability of the crankpin.

[0041] Reference Figures 1 to 3 The crankshaft assembly of the embodiments of the present application comprises a crankshaft 200 and a crankpin 100. The two ends of the crankshaft 200 along the axial direction of the crankshaft 200 are respectively a first end 210 and a second end 220. The first end 210 of the crankshaft 200 is used to connect the crankpin 100, and the second end 220 is used to connect a rotor 300 (refer to Figure 7 ).

[0042] The first end 210 of the crankshaft 200 is provided with a pin hole 230. The pin hole 230 extends along the axial direction of the crankshaft 200 and is eccentrically arranged relative to the axis of the crankshaft 200. The pin hole 230 penetrates the end face of the first end 210. One end of the crankpin 100 is located in the pin hole 230, and the other end of the crankpin 100 is exposed to the first end 210 of the crankshaft 200. The crankpin 100 can be coaxially installed in the pin hole 230, for example, the fixation of the crankpin 100 can be achieved by interference fit.

[0043] The second end 220 of the crankshaft 200 is provided with a positioning hole 240. The positioning hole 240 extends along the axial direction of the crankshaft 200. The positioning hole 240 penetrates the end face of the second end 220 to form an aperture 243. The positioning hole 240 is arranged at the center of the crankshaft 200 and communicates with the pin hole 230. The communication part of the positioning hole 240 and the pin hole 230 forms a positioning arc line 250. The positioning arc line 250 is located in the aperture 243 along the axial direction of the crankshaft 200 at least part of the arc segment of the orthogonal projection of the end face of the second end 220. Therefore, there is no structural obstruction or incomplete structural obstruction in the direction of the positioning arc line 250 along the axial direction of the crankshaft 200 towards the second end 220, so that at least part of the arc segment of the positioning arc line 250 can be observed from the aperture 243 of the second end 220. The positioning arc line 250 is used for angular positioning of the weight block 400 of the rotor 300.

[0044] It can be understood that some compressors determine the installation position of the counterweight block by positioning the counterweight block and the crank pin, mainly by positioning the position of the crank pin and the crankshaft by a tool to determine the position and installation angle of the counterweight block, and the installation angle is positioned by positioning the axis of the crank pin and the crankshaft by the tool. This positioning method needs to configure a corresponding tool, and different structures of the crankshaft and the crank pin may cause the tool to be unable to be used universally and need to be adjusted or replaced. In addition, the positioning accuracy of the tool is difficult to guarantee due to the influence of the stability of the installation of the crank pin. After the assembly of the counterweight block is completed, it is difficult to verify the accuracy of the installation angle.

[0045] In the crankshaft assembly of the embodiment of the present application, the positioning arc line 250 is a intersection line formed by the hole wall of the positioning hole 240 and the hole wall of the pin hole 230 at the communication position. Therefore, the axis of the pin hole 230 is collinear with the center of the positioning arc line 250, and the center of the positioning arc line 250 or at least part of the arc segment determines the position of the axis of the pin hole 230. The crank pin 100 is coaxially installed in the pin hole 230, and the axis of the crank pin 100 can be obtained. In addition, the positioning arc line 250 can be used for angle positioning of the counterweight block 400 of the rotor assembly, and a tool for positioning the crank pin 100 is not needed. During assembly, the positioning arc line 250 can be obtained from the hole opening 243 of the positioning hole 240 of the second end 220 of the crankshaft 200, so that the line L connecting the center of the positioning arc line 250 and the axis of the crankshaft 200 can be determined. The counterweight block 400 of the rotor 300 is positioned at a preset included angle a with the line L as a reference, so that the installation angle is ensured. After installation, the line L can still be obtained from the second end 220 as a reference line to determine whether the positioning structure on the counterweight block 400 and the reference line meet the preset angle, so that convenient and efficient post-assembly inspection operation is realized.

[0046] In addition, the communication between the positioning hole 240 and the pin hole 230 enables the crank pin 100 to balance the pressure in the pressure assembly process through the positioning hole 240, so that the pressure accumulation in the pin hole 230 is avoided, the pressure in the pin hole 230 is balanced, the required pressure assembly force is reduced, the problems of difficult pressure assembly and the risk of ejection of the crank pin 100 are effectively solved, and the pressure assembly process is more stable. Therefore, the compressor adopting the crankshaft assembly of the present application does not need to use a tool for positioning during the assembly process of the rotor 300 and the counterweight block 400, and provides a new idea for the positioning and detection of the counterweight block 400. In addition, the positioning of the counterweight block 400 is not affected by the stability of the pressure assembly of the crank pin 100. After assembly, the assembly angle can be conveniently detected, so that the assembly positioning and subsequent detection are simplified, and the accuracy of the positioning is ensured.

[0047] It should be noted that the positioning arc 250 and the shaft center of the crankshaft 200 can be obtained by commonly used techniques in industry, such as visual processing technology or coordinate projection technology. The positioning arc 250 and the shaft center of the crankshaft 200 are obtained by visual processing technology, which means that the positioning arc 250 and the profile of the peripheral wall of the crankshaft 200 are obtained by an image acquisition device such as an industrial camera from the second end 220 of the crankshaft 200, and then the line L connecting the center of the positioning arc 250 and the shaft center of the crankshaft 200 is calculated by image processing software. After the visual processing technology is used to obtain the profile of the entity (such as the positioning arc 250, the outer circle or inner hole profile of the crankshaft 200, and the positioning edge 410 of the counterweight 400), the center and the shaft center are calculated, which is a commonly used technique in industry, and those skilled in the art can obtain the line L and the angle a by the above processing according to the current visual processing technology. The specific technical principles and calculation methods are not described here. The positioning arc 250 and the shaft center of the crankshaft 200 are obtained by projection technology, which means that three-dimensional or two-dimensional information is obtained by projecting light onto the surface of an object (such as the positioning arc 250, the outer profile of the crankshaft 200, and the positioning edge 410 of the counterweight 400) and capturing the reflected or projected image by a coordinate measuring instrument, so as to realize high-precision spatial positioning. After the projection technology is used to obtain the positioning arc 250 and the position of the crankshaft 200, the shaft center and the line L are calculated, which is a commonly used technique in industry, and those skilled in the art can obtain the line L and the angle a by the above processing according to the current projection technology. The technical principles and calculation methods are not described here.

[0048] It can be understood that the crankshaft assembly of the embodiment of the application can facilitate the positioning and installation of the counterweight 400 of the rotor 300 at each stage (such as the sample stage, the small batch stage, and the batch production stage) of the compressor production process. For example, in the sample and small batch stages, there is no need to design a special tooling, which greatly facilitates the debugging and optimization design of the sample / small batch, and for the large batch production stage, the positioning and detection accuracy can be improved, the production process can be optimized, and the production efficiency can be improved.

[0049] Reference Figure 1 and Figure 2In some embodiments, the positioning hole 240 comprises a first hole section 241 extending along the axial direction of the crankshaft 200 and a second hole section 242, one end of the first hole section 241 communicates with the pin hole 230 to form the positioning arc 250, the second hole section 242 communicates with the other end of the first hole section 241 and the hole opening 243 on the end face of the second end 220, the hole diameter of the second hole section 242 is larger than the hole diameter of the first hole section 241 at the positioning arc 250, so that a guide is provided inside the crankshaft 200 from the positioning arc 250 to the side of the second end 220, which ensures that the orthographic projection of the positioning arc 250 on the end face is located in the hole opening 243, avoiding the positioning arc 250 being blocked by structures, and the complete positioning arc 250 can be observed from the hole opening 243.

[0050] It can be understood that in some cases, the hole opening 243 on the end face of the second end 220 can have partial structural obstruction (for example, the crankshaft 200 is installed with other structures along the radial direction to form partial obstruction in the second hole section 242), as long as a part of the arc section of the positioning arc 250 can be observed from the hole opening 243, that is, at least part of the arc section of the orthographic projection of the positioning arc 250 on the end face of the second end 220 is located in the hole opening 243, and the center of the positioning arc 250 can also be obtained through this arc section, so as to determine the axis of the pin hole 230.

[0051] As an example, the hole diameter of the first hole section 241 gradually decreases from the second end 220 of the crankshaft 200 to the first end 210, that is, the first hole section 241 has a taper hole structure, which gradually decreases from the connection with the second hole section 242 to the first end 210 of the crankshaft 200, so that a tool with a taper on the front end can be used for machining, which facilitates center positioning and reduces cutting force. The taper on the front end of the tool naturally forms the tapered first hole section 241, which facilitates machining, and the larger second hole section 242 can remove more material of the crankshaft 200, which is beneficial to the lightweight of the crankshaft 200.

[0052] Reference Figure 4 In some embodiments, the second hole section 242 can also be a stepped hole structure with at least two sections, the hole diameters of the at least two sections gradually increase from the first hole section 241 to the second end 220 of the crankshaft 200, so as to further reduce the weight of the crankshaft 200, and ensure that the second end 220 of the crankshaft 200 has a large enough hole opening 243 to facilitate obtaining the positioning arc 250 through the hole opening 243.

[0053] Reference Figure 4In some embodiments, the pin hole 230 can include a mounting hole section 231 extending along the axial direction of the crankshaft 200 and a communication hole section 232, one end of the communication hole section 232 being communicated with the positioning hole 240 to form a positioning arc 250, and the mounting hole section 231 extending from the end face of the first section of the crankshaft 200 to the other end of the communication hole section 232, the hole diameter of the mounting hole section 231 being larger than the hole diameter of the communication hole section 232 at the positioning arc 250, so that the crank pin 100 can be press-fitted in the mounting hole section 231, and the communication hole section 232 can be located on the side of the crank pin 100 away from the first end 210 of the crankshaft 200, so as to avoid the crank pin 100 pressing the positioning arc 250 and affecting the accuracy of positioning.

[0054] As an example, the hole diameter of the communication hole section 232 gradually decreases from the first end 210 of the crankshaft 200 towards the second end 220. That is, the communication hole section 232 has a taper hole structure, which gradually decreases from the connection with the mounting hole section 231 towards the second end 220 of the crankshaft 200, so that the machining can be facilitated by using a tool with a taper at the front end, and the cutting force can be reduced, and the taper at the front end of the tool is naturally a first hole section 241 with a conical shape, which facilitates machining.

[0055] It can be understood that the compressor further includes a shell, an accommodation cavity for accommodating the rotor assembly and the crankshaft assembly is formed in the shell, and a bearing chamber is protruded from the bottom wall of the shell towards the accommodation cavity, and the second end 220 of the crankshaft 200 is rotatably connected to the bearing chamber through the bearing, so as to realize the rotational installation of the crankshaft 200.

[0056] In some technical compressors, a relatively closed cavity is formed between the end face of the second end 220 of the crankshaft 200 and the bottom wall in the bearing chamber, so that the internal lubricating grease is difficult to discharge. In the crankshaft assembly of some embodiments of the present application, Figure 5 , the crankshaft 200 is further provided with a side hole 260 extending from the outer peripheral wall of the crankshaft 200 and communicated with the positioning hole 240, so that the lubricating oil or refrigeration air near the end of the second end 220 of the crankshaft 200 can enter the inside of the crankshaft 200 through the positioning hole 240 when the compressor is running, and flow out from the side hole 260 to the outer peripheral wall of the crankshaft 200 or fall back into the accommodation cavity in the shell under the action of the centrifugal force generated by the rotation of the crankshaft 200, so as to realize the lubrication of the outer peripheral wall of the crankshaft 200 and carry out part of the heat in the bearing chamber. The opening of the side hole 260 can further remove part of the material of the crankshaft 200, so as to realize the weight reduction of the crankshaft 200 and facilitate the light weight of the compressor.

[0057] In one example, the side hole 260 can be arranged at the lower half of the crankshaft 200, for example, the side hole 260 is closer to the first end 210 than the top end of the crankshaft 200, which can shorten the lubricating oil outflow path and help to avoid the rotor 300 installation position. In another example, the side hole 260 can be arranged at the upper half of the crankshaft 200, for example, the side hole 260 is closer to the second end 220 than the first end 210 of the crankshaft 200, which can discharge the lubricating oil at the upper half of the positioning hole 240 and reduce the lubricating oil retention in the positioning hole 240.

[0058] In some embodiments, the number of side holes 260 can be one or more, and in the case of multiple, it can be two, three, four or more. Increasing the number of side holes 260 can help improve the discharge efficiency of the lubricating oil and improve the lubrication effect of the crankshaft 200.

[0059] Reference Figure 5 In one example, at least two of the plurality of side holes 260 can be circumferentially distributed around the axis of the crankshaft 200. When the lubricating oil flowing into the positioning hole 240 reaches the position where the side holes 260 are arranged, it can be discharged simultaneously through the circumferentially distributed plurality of side holes 260, thereby improving the discharge efficiency.

[0060] Reference Figure 6 In another example, at least two of the plurality of side holes 260 can be axially spaced along the crankshaft 200. When the lubricating oil flowing into the positioning hole 240 reaches the side hole 260 closest to the first end 210, it can be partially discharged. The remaining lubricating oil in the positioning hole 240 can continue to flow to the side hole 260 away from the first end 210 for discharge, thereby dispersing the refrigerant around different positions in the axial direction of the crankshaft 200 and improving the lubrication effect of the outer peripheral wall of the crankshaft 200. Among them, some side holes 260 can be arranged at the lower half of the crankshaft 200, some side holes 260 can be arranged at the upper half of the crankshaft 200, or all side holes 260 can be arranged at the lower half of the crankshaft 200, or all side holes 260 can be arranged at the upper half of the crankshaft 200.

[0061] It can be understood that even if the side hole 260 is arranged with structures such as the rotor 300, the lubricating oil can still seep out through the gap between the crankshaft 200 and these structures, and effectively lubricate the outer peripheral wall of the crankshaft 200 or flow back into the accommodation cavity.

[0062] Reference Figure 3 And Figure 7The compressor of the embodiment of the present application comprises a rotor assembly and the crankshaft assembly of any of the above embodiments, the rotor assembly comprises a rotor 300 and a counterweight 400, the rotor 300 is coaxially sleeved on the second end 220 of the crankshaft 200, the counterweight 400 is connected to the rotor 300, the counterweight 400 is provided with a positioning structure, and the positioning structure is arranged at a set included angle a with respect to the line L connecting the center of the positioning arc 250 and the axis of the crankshaft 200.

[0063] During the assembly of the rotor 300 and the counterweight 400, the positioning arc 250 can be obtained as a reference through the orifice 243 of the second end 220 of the crankshaft 200, the installation angle of the counterweight 400 is positioned, a tooling is not needed for positioning, and the positioning of the counterweight 400 is not affected by the pressing stability of the crankpin 100, which simplifies the positioning mode and ensures the accuracy of the positioning, meets the dynamic balance requirements of the compressor, and is beneficial to improving the stability and assembly efficiency of the compressor.

[0064] In some embodiments of the compressor, with reference to Figure 7 The counterweight 400 has a 180° semicircular ring structure and has two collinear positioning edges 410 in the radial direction and passes through the axis of the crankshaft 200, therefore, the positioning structure on the counterweight 400 can be the two collinear positioning edges 410, and the installation angle of the counterweight 400 can be determined by positioning the angle of the positioning edge 410 and the above-mentioned line L. The detection after installation is the same.

[0065] It can be understood that the assembly angle of the counterweight 400 of the rotor assembly of different structures can be different, the shape of the counterweight 400 can not be a 180° semicircle, the included angle a can be determined by one of the positioning edges 410, and the included angle a of different counterweights 400 can vary, and the specific included angle a is determined according to the specific structure of the counterweight 400 and the dynamic balance design. As long as one positioning structure (for example, the positioning edge 410) is selected as a positioning reference with the above-mentioned line L to determine the included angle a, the installation angle of the counterweight 400 can be determined.

[0066] For example, in some embodiments, the positioning structure on the counterweight 400 can be one of the positioning edges 410 of the counterweight 400, the counterweight 400 has a positioning edge 410 extending in the radial direction of the crankshaft 200, the positioning edge 410 can be used as the positioning structure of the counterweight 400, and the positioning edge 410 is at a set included angle a with respect to the line L connecting the center of the positioning arc 250 and the axis of the crankshaft 200. Therefore, during assembly, the positioning edge 410 of the counterweight 400 can be used as the positioning structure to determine the included angle a of the positioning edge 410 and the line L connecting the center of the positioning arc 250 of the crankshaft 200 and the axis of the crankshaft 200, so that the positioning of the counterweight 400 is completed, and the counterweight 400 is quickly installed.

[0067] Alternatively, the counterweight 400 can also not be positioned by the installation angle of the positioning edge 410, for example, the positioning structure on the counterweight 400 can be a positioning bump, a positioning hole 240 or the like structure provided on the counterweight 400, and the counterweight 400 can be positioned and installed by considering the included angle α between the connecting line L of the positioning bump, the positioning hole and the shaft center of the crankshaft 200 and the connecting line L of the center of the positioning arc 250 and the shaft center of the crankshaft 200. The detection after installation is the same.

[0068] In actual application, which structures on the counterweight 400 are used as the positioning reference can be considered according to the overall dynamic balance requirement in the dynamic balance design, and the included angle α between the connecting line L of the positioning structure and the shaft center of the crankshaft 200 and the center of the positioning arc 250 is determined to accurately position the installation angle of the counterweight, so that the positioning can be quickly and accurately realized in actual assembly, and the problems such as the need to replace the tooling due to different structures of different compressors are avoided, which greatly optimizes the positioning and assembly process and the detection process, and is beneficial to improving the assembly efficiency and yield.

[0069] The vehicle of the embodiment of the present application includes the compressor of the above embodiment, which is beneficial to improving the stability of the refrigeration system of the vehicle and improving the use experience.

[0070] The compressor of the embodiment of the present application can be used in the refrigeration system of the vehicle, can be used to cool and dehumidify the air in the vehicle, or be used for temperature regulation as part of the thermal management system of the new energy vehicle. By improving the convenience and accuracy of the positioning of the counterweight 400, the dynamic balance requirement is met, so as to improve the assembly efficiency and running stability of the compressor, and then ensure the stable operation of the refrigeration system.

[0071] The vehicle of the embodiment of the present application includes the compressor of the above embodiment, and the vehicle can be a private car, such as a sedan, an SUV, an MPV or a pickup truck, etc. The vehicle can also be an operating vehicle, such as a van, a bus, a small truck or a large trailer, etc. The vehicle can be an oil car or a new energy car. When the vehicle is a new energy car, it can be a hybrid car or a pure electric car.

[0072] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A crankshaft assembly, characterized in that, Includes a crankshaft and a crank pin, wherein the crankshaft has a first end and a second end at its two ends along its axial direction, wherein, The crankshaft has a pin hole at its first end. The pin hole extends along the axial direction of the crankshaft and is eccentrically positioned relative to the axis of the crankshaft. The pin hole passes through the end face of the first end. One end of the crank pin is located inside the pin hole, and the other end of the crank pin is exposed outside the first end of the crankshaft. The crankshaft has a positioning hole at its second end, which extends along the axial direction of the crankshaft and passes through the end face of the second end to form an opening. The positioning hole is located at the center of the crankshaft and connects to the pin hole. The connection between the positioning hole and the pin hole forms a positioning arc. At least a portion of the arc segment of the positioning arc projected onto the end face of the second end along the axial direction of the crankshaft is located within the opening. The positioning arc is used for angular positioning of the rotor's counterweight.

2. The crankshaft assembly according to claim 1, characterized in that, The positioning hole includes a first hole segment and a second hole segment extending axially along the crankshaft. One end of the first hole segment is connected to the pin hole to form the positioning arc. The second hole segment is connected to the other end of the first hole segment and the orifice. The diameter of the second hole segment is larger than the diameter of the first hole segment at the positioning arc.

3. The crankshaft assembly according to claim 2, characterized in that, The diameter of the first bore gradually decreases from the second end of the crankshaft toward the first end.

4. The crankshaft assembly according to claim 1, characterized in that, The pin hole includes a mounting hole section and a connecting hole section extending coaxially along the axial direction of the crankshaft. One end of the connecting hole section connects to the positioning hole to form the positioning arc. The mounting hole section extends from the end face of the first segment of the crankshaft to the other end connected to the connecting hole section. The diameter of the mounting hole section is larger than the diameter of the connecting hole section at the positioning arc.

5. The crankshaft assembly according to claim 4, characterized in that, The diameter of the connecting hole gradually decreases from the first end of the crankshaft toward the second end.

6. The crankshaft assembly according to claim 1, characterized in that, The crankshaft also has a side hole extending from the outer peripheral wall of the crankshaft and communicating with the positioning hole.

7. The crankshaft assembly according to claim 6, characterized in that, The number of side holes is multiple, and at least two of the multiple second guide holes are circumferentially spaced around the crankshaft; and / or, at least two of the multiple second guide holes are axially spaced along the crankshaft.

8. A compressor, characterized in that, include: The crankshaft assembly as described in any one of claims 1 to 7, The rotor assembly includes a rotor and a counterweight. The rotor is coaxially sleeved on the second end of the crankshaft. The counterweight is connected to the rotor. The counterweight is provided with a positioning structure. The positioning structure is set at a set angle relative to the line connecting the center of the positioning arc and the axis of the crankshaft.

9. The compressor according to claim 8, characterized in that, The counterweight has a positioning edge extending radially along the crankshaft, and the positioning edge forms a set angle with the connecting line.

10. A vehicle, characterized in that, The compressor included in any one of claims 8 or 9.

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