Reciprocating compressor

Abstract

The present invention discloses a reciprocating compressor, comprising: a motor, a cylinder assembly, a first support assembly, a second support assembly and a crankshaft, wherein the cylinder assembly is arranged at one axial end of the motor; the first support assembly is arranged at one axial end of the motor and is connected to the cylinder assembly, the first support assembly comprises a first support frame and a first bearing, the first support frame is provided with a first mounting seat, the first bearing is riveted in the first mounting seat and the first bearing is rotatable relative to the first mounting seat; the second support assembly is arranged at the other axial end of the motor, the second support assembly comprises a second support frame and a second bearing, the second support frame is provided with a second mounting seat, the second bearing is riveted in the second mounting seat and the second bearing is rotatable relative to the second mounting seat. The reciprocating compressor according to the embodiment of the present invention simplifies the structure of the reciprocating compressor, facilitates the self-alignment, reduces the processing accuracy of the support assembly, is simple and convenient to install, and improves the reliability of the reciprocating compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a reciprocating compressor. Background Art

[0002] During operation, the compressor is mainly subjected to the gas force of the refrigerant being compressed in the cylinder and the unbalanced magnetic pull generated by the eccentricity of the stator and rotor. The gas force is transmitted to the crankshaft secondary shaft through the piston and connecting rod, and the unbalanced magnetic pull is transmitted to the crankshaft main shaft through the rotor. The crankshaft relies on the frame for support.

[0003] In the related art, most compressors are cast in a single frame structure, which is complex to process, heavy, and costly. In addition, the stator and rotor alignment is complex during installation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a reciprocating compressor, which has a simple structure and a self-aligning function.

[0005] According to an embodiment of the present invention, a reciprocating compressor comprises: a motor, the motor comprises a stator and a rotor, the rotor is rotatably arranged in the stator; a cylinder assembly, the cylinder assembly is arranged at one axial end of the motor; a first support assembly, the first support assembly is arranged at one axial end of the motor and is connected to the cylinder assembly, the first support assembly comprises a first support frame and a first bearing, the first support frame is provided with a first mounting seat, the first bearing is riveted in the first mounting seat and the first bearing is rotatable relative to the first mounting seat; a second support assembly, the second support assembly is arranged at the other axial end of the motor, the second support assembly comprises a second support frame and a second bearing, the second support frame is provided with a second mounting seat, the second bearing is riveted in the second mounting seat and the second bearing is rotatable relative to the second mounting seat; a crankshaft, the crankshaft comprises a main shaft and a secondary shaft, the secondary shaft is connected to the main shaft, the main shaft is inserted in the rotor, one axial end of the main shaft is connected to the first bearing, and the other axial end is connected to the second bearing, and the secondary shaft is connected to the cylinder assembly.

[0006] According to the reciprocating compressor of the embodiment of the present invention, a first support assembly and a second support assembly are respectively arranged at the axial ends of the motor, and the first bearing and the first mounting seat are riveted together and the first bearing is rotatable relative to the first mounting seat, and the second bearing and the second mounting seat are riveted together and the second bearing is rotatable relative to the second mounting seat. The first bearing and the first support frame can form a first centering structure, and the second bearing and the second support frame can form a second centering structure. The first centering structure and the second centering structure are respectively matched with the two ends of the main shaft of the crankshaft, which simplifies the structure of the reciprocating compressor, reduces the processing accuracy of the support assembly, is simple and convenient to install, has little wear between the bearing and the crankshaft, low noise, and low torque power consumption when the crankshaft rotates, thereby improving the reliability of the reciprocating compressor.

[0007] According to some embodiments of the present invention, the first mounting seat is formed into a ring shape and the inner wall surface of the first mounting seat is formed into a spherical surface, the first bearing includes a first mating segment, the outer peripheral surface of the first mating segment forms a spherical surface so that a spherical contact is formed between the outer peripheral surface of the first mating segment and the inner wall surface of the first mounting seat; the second mounting seat is formed into a ring shape and the inner wall surface of the second mounting seat is formed into a spherical surface, the second bearing includes a second mating segment, the outer peripheral surface of the second mating segment forms a spherical surface so that a spherical contact is formed between the outer peripheral surface of the second mating segment and the inner wall surface of the second mounting seat.

[0008] In some further embodiments of the present invention, the first bearing further includes a first connecting section, and an inner circumferential surface of the first connecting section cooperates with the crankshaft.

[0009] Specifically, the inner diameter of the first matching section is greater than the inner diameter of the first connecting section.

[0010] In some embodiments of the present invention, the first mating segment is located at one axial end of the first connecting segment.

[0011] In some other embodiments of the present invention, the first mating section and the first connecting section are coaxially arranged.

[0012] Optionally, the structure of the second bearing is the same as that of the first bearing.

[0013] According to some embodiments of the present invention, the first support frame and the second support frame are respectively located at two axial ends of the stator, and the first support frame and the second support frame are both connected to the stator.

[0014] In some specific embodiments of the present invention, the first support frame includes a first mounting plate and a first connecting leg, one end of the first connecting leg is connected to the first mounting plate, and the other end is connected to the stator, and the first mounting seat is formed on the first mounting plate.

[0015] Optionally, the first mounting seat is a first punched flange formed on the first mounting plate.

[0016] Specifically, the cylinder assembly includes a cylinder, a piston, a connecting rod and a cylinder bracket, the cylinder is arranged on the cylinder bracket, the piston is movably arranged in the cylinder, the connecting rod is used to connect the piston and the crankshaft, and the cylinder bracket is connected to the first support frame.

[0017] In some embodiments of the present invention, a recessed portion that is recessed in a direction away from the cylinder assembly is formed on the first mounting plate, and the cylinder bracket is connected to a bottom wall of the recessed portion.

[0018] In some embodiments of the present invention, the first support frame is connected to the cylinder bracket by welding, or the first support frame and the cylinder bracket are integrally stamped.

[0019] According to some embodiments of the present invention, the second support frame is formed as an arc-shaped plate-like structure protruding in a direction away from the other axial end of the motor.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of the internal structure of a reciprocating compressor according to an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a first support assembly of a reciprocating compressor according to an embodiment of the present invention;

[0024] Figure 3 is a cross-sectional view of a second support assembly of a reciprocating compressor according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the assembly process of the first supporting assembly of the reciprocating compressor according to an embodiment of the present invention, wherein the arrows in the figure indicate the assembly direction;

[0026] Figure 5 is a schematic diagram of the assembly process of the second support assembly of the reciprocating compressor according to an embodiment of the present invention, wherein the arrows in the figure indicate the assembly direction;

[0027] Figure 6 is a schematic structural diagram of a first bearing according to an embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of a first bearing according to another embodiment of the present invention;

[0029] Figure 8 is a schematic structural diagram of a first bearing according to yet another embodiment of the present invention;

[0030] Fig. 9 is a schematic diagram of the cooperation between the cylinder bracket and the first support frame according to an embodiment of the invention;

[0031] Fig.10 is a schematic diagram of the cooperation between the cylinder bracket and the first support frame according to another embodiment of the present invention;

[0032] Fig.11 Schematic diagram of the structure of a cylinder bracket according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Reciprocating compressor 100,

[0035] Rotor 1,

[0036] Cylinder assembly 2, cylinder 21, piston 22, connecting rod 23, cylinder support 24,

[0037] first supporting assembly 3, first supporting frame 31, first mounting plate 311, first mounting seat 3111, recessed portion 3112, first connecting foot 312, first fixing ear 3121, first screw hole 3122,

[0038] The first bearing 32, the first matching section 321, the first connecting section 322, the first sub-connecting section 3221, the second sub-connecting section 3222,

[0039] The second support assembly 4, the second support frame 41, the second mounting seat 411, the second fixing ear 412, the second screw hole 4122, the second bearing 42, the second matching section 421,

[0040] Crankshaft 5. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "length", "width", "upper", "lower", "bottom", "inner", "outer", "axial" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] A reciprocating compressor 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0044] like Figure 1 As shown, the reciprocating compressor 100 according to the embodiment of the present invention includes: a motor, a cylinder assembly 2 , a first support assembly 3 , a second support assembly 4 and a crankshaft 5 .

[0045] Specifically, the motor includes a stator (not shown) and a rotor 1, wherein the rotor 1 is rotatably disposed in the stator. The cylinder assembly 2 is disposed at one axial end of the motor. Figure 1 In the example, the cylinder assembly 2 can be arranged at the upper end of the motor.

[0046] The first support assembly 3 is arranged at one axial end of the motor and connected to the cylinder assembly 2, and the second support assembly 4 is arranged at the other axial end of the motor. The crankshaft 5 includes a main shaft and a secondary shaft, and the secondary shaft is connected to the main shaft. For example, the secondary shaft can be arranged at the upper end of the main shaft. Among them, the main shaft is inserted into the rotor 1 and one axial end of the main shaft is connected to the first bearing 32, and the other axial end of the main shaft is connected to the second bearing 42. The secondary shaft is connected to the cylinder assembly 2. Among them, the rotor 1 can be interference fit with the crankshaft 5 to drive the crankshaft 5 to rotate through the rotor 1.

[0047] For example, refer to Figure 1 In some embodiments of the present invention, the first support assembly 3 can be arranged at the upper end of the motor, and the second support assembly 4 can be arranged at the lower end of the motor. The first support assembly 3 and the second support assembly 4 both support the crankshaft 5 to form a double support structure, thereby improving the stability and reliability of the reciprocating compressor 100.

[0048] Reference Figure 2 and Figure 3The first support assembly 3 includes a first support frame 31 and a first bearing 32. The first support frame 31 is provided with a first mounting seat 3111. The first bearing 32 is riveted in the first mounting seat 3111 and the first bearing 32 is rotatable relative to the first mounting seat 3111. The second support assembly 4 includes a second support frame 41 and a second bearing 42. The second support frame 41 is provided with a second mounting seat 411. The second bearing 42 is riveted in the second mounting seat 411 and the second bearing 42 is rotatable relative to the second mounting seat 411.

[0049] Specifically, the first bearing 32 is connected to the first mounting seat 3111 by riveting, and after riveting, the first bearing 32 has a certain degree of rotational freedom in the first mounting seat 3111, so that the first bearing 32 can rotate relative to the first mounting seat 3111 when a force is applied. The second bearing 42 is connected to the second mounting seat 411 by riveting, and after riveting, the second bearing 42 has a certain degree of rotational freedom in the second mounting seat 411, so that the second bearing 42 can rotate relative to the second mounting seat 411 when a force is applied.

[0050] Thus, the first bearing 32 and the first support frame 31 can form a first centering structure, and the second bearing 42 and the second support frame 41 can form a second centering structure. The first centering structure and the second centering structure respectively cooperate with the two ends of the main shaft of the crankshaft 5. During installation, the first centering structure and the second centering structure can be used to achieve centering clearance cooperation without preload force between the first bearing 32 and the crankshaft 5 and between the second bearing 42 and the crankshaft 5, thereby solving the problem of insufficient machining accuracy of the first support assembly 3 and the second support assembly 4. Even if there is a machining error in the flatness of the end faces of the support assembly (i.e., the first support assembly 3 and the second support assembly 4) fixed to the stator, the centering between the crankshaft 5 and the bearings (i.e., the first bearing 32 and the second bearing 42) can be achieved through the centering structure (i.e., the first centering structure and the second centering structure), thereby simplifying the structure of the reciprocating compressor 100, reducing the machining accuracy of the support assembly, making the installation simple and convenient, and reducing the wear between the bearing and the crankshaft 5, reducing the noise, and reducing the torque power consumption when the crankshaft 5 rotates, thereby improving the reliability of the reciprocating compressor 100.

[0051] According to the reciprocating compressor 100 of the embodiment of the present invention, the first support assembly 3 and the second support assembly 4 are respectively arranged at the axial ends of the motor, and the first bearing 32 and the first mounting seat 3111 are riveted to form and the first bearing 32 is rotatable relative to the first mounting seat 3111, the second bearing 42 and the second mounting seat 411 are riveted to form and the second bearing 42 is rotatable relative to the second mounting seat 411, the first bearing 32 and the first support frame 31 can form a first centering structure, the second bearing 42 and the second support frame 41 can form a second centering structure, the first centering structure and the second centering structure are respectively matched with the two ends of the main shaft of the crankshaft 5, the structure of the reciprocating compressor 100 is simplified, the processing accuracy of the support assembly is reduced, the installation is simple and convenient, the wear between the bearing and the crankshaft 5 is small, the noise is small, and the torque power consumption when the crankshaft 5 rotates is low, thereby improving the reliability of the reciprocating compressor 100.

[0052] According to some embodiments of the present invention, the first mounting seat 3111 is formed in a ring shape and the inner wall surface of the first mounting seat 3111 is formed in a spherical surface, the first bearing 32 includes a first mating section 321, and the outer peripheral surface of the first mating section 321 forms a spherical surface so that a spherical contact is formed between the outer peripheral surface of the first mating section 321 and the inner wall surface of the first mounting seat 3111; the second mounting seat 411 is formed in a ring shape and the inner wall surface of the second mounting seat 411 is formed in a spherical surface, the second bearing 42 includes a second mating section 421, and the outer peripheral surface of the second mating section 421 forms a spherical surface so that a spherical contact is formed between the outer peripheral surface of the second mating section 421 and the inner wall surface of the second mounting seat 411.

[0053] It should be noted that the "spherical surface" described in the present application can be understood as at least a part of a spherical surface. For example, in some embodiments of the present application, the inner wall surface of the first mounting seat 3111 is a part of the spherical surface, the outer peripheral surface of the first matching section 321 is a part of the spherical surface, the inner wall surface of the second mounting seat 411 is a part of the spherical surface, and the outer peripheral surface of the second matching section 421 is a part of the spherical surface.

[0054] For example, refer to Figure 2 and Figure 3 , the first matching section 321 is generally formed in a drum shape. The inner wall surface of the first mounting seat 3111 can be formed as an arc-shaped surface protruding in the direction away from the central axis of the first mounting seat 3111, and the cross-sectional area of ​​the middle part of the first mounting seat 3111 gradually decreases in the direction from the middle part of the first mounting seat 3111 toward the axial ends of the first mounting seat 3111. The second matching section 421 is generally formed in a drum shape. The inner wall surface of the second mounting seat 411 can be formed as an arc-shaped surface protruding in the direction away from the central axis of the second mounting seat 411, and the cross-sectional area of ​​the middle part of the second mounting seat 411 gradually decreases in the direction from the middle part of the second mounting seat 411 toward the axial ends of the second mounting seat 411. The structure is simple and easy to process.

[0055] As a result, the first bearing 32 and the first mounting seat 3111 are easily assembled, so that the first bearing 32 and the first mounting seat 3111 can easily form a first centering structure. At the same time, the second bearing 42 and the second mounting seat 411 are easily assembled, so that the second bearing 42 and the second mounting seat 411 can easily form a second centering structure, which greatly simplifies the structure and assembly process of the reciprocating compressor 100 and improves the production efficiency of the reciprocating compressor 100.

[0056] In some further embodiments of the present invention, the first bearing 32 further includes a first connecting section 322, and the inner circumferential surface of the first connecting section 322 cooperates with the crankshaft 5. Thus, the cooperation length between the first bearing 32 and the crankshaft 5 can be increased, and the cooperation accuracy between the first bearing 32 and the crankshaft 5 can be ensured, thereby improving the stability and reliability of the cooperation between the first bearing 32 and the crankshaft 5.

[0057] Optionally, the inner diameter of the first matching section 321 is greater than the inner diameter of the first connecting section 322. Thus, the deformation of the first matching section 321 during the riveting process can be effectively avoided to affect the matching between the first bearing 32 and the crankshaft 5, and the matching accuracy between the first bearing 32 and the crankshaft 5 is further ensured.

[0058] In some embodiments of the present invention, the first matching segment 321 is located at one axial end of the first connecting segment 322. Figure 2 and Figure 7 , the first matching section 321 can be located at the lower end of the first connecting section 322. Thus, the matching accuracy between the first bearing 32 and the crankshaft 5 is guaranteed and materials are saved.

[0059] In other embodiments of the present invention, referring to Figure 8 , the first matching section 321 is coaxially arranged with the first connecting section 322. For example, the first matching section 321 may be located in the middle of the first connecting section 322. For another example, the first connecting section 322 may include a first sub-connecting section 3221 and a second sub-connecting section 3222, and the first sub-connecting section 3221 and the second sub-connecting section 3222 may be connected to both ends of the first matching section 321, respectively. Thus, the matching length between the crankshaft 5 and the first bearing 32 is increased, thereby improving the operation stability.

[0060] It should be noted that the “middle” in the present application should be understood in a broad sense and is not a strictly intermediate position, that is, the position between the two axial ends of the first connecting segment 322 can be understood as the middle of the first connecting segment 322 .

[0061] In some embodiments of the present invention, the first bearing 32 is an integrally formed part, thereby simplifying the processing technology of the first bearing 32, improving the processing efficiency, and enhancing the overall structural strength of the first bearing 32.

[0062] Optionally, the structure of the second bearing 42 is the same as that of the first bearing 32. Thus, the first bearing 32 and the second bearing 42 adopt a unified structure, which is easy to process and helps to improve production efficiency.

[0063] According to some embodiments of the present invention, the first support frame 31 and the second support frame 41 are respectively located at two axial ends of the stator (not shown) and the first support frame 31 and the second support frame 41 are both connected to the stator. Figure 1 , the first support frame 31 can be located at the upper end of the stator, the second support frame 41 can be located at the lower end of the stator, and the stator is located between the first support frame 31 and the second support frame 41. Therefore, the materials used for the first support frame 31 and the second support frame 41 can be reduced, the structures of the first support frame 31 and the second support frame 41 can be simplified, and the overall volume of the reciprocating compressor 100 can be reduced, which is conducive to miniaturization of the reciprocating compressor 100.

[0064] In some specific embodiments of the present invention, the first support frame 31 includes a first mounting plate 311 and a first connecting pin 312, one end of the first connecting pin 312 is connected to the first mounting plate 311, and the other end of the first connecting pin 312 is connected to the stator, and a first mounting seat 3111 is formed on the first mounting plate 311.

[0065] For example, refer to Figure 1 , Figure 2 and Figure 4 , the upper end of the first connecting leg 312 is connected to the first mounting plate 311, and the lower end of the first connecting leg 312 is connected to the stator. Optionally, there may be two first connecting legs 312, and the two first connecting legs 312 are arranged at both ends of the length direction of the first mounting plate 311. The first support frame 31 is provided with a first fixing ear 3121, and the first fixing ear 3121 can be arranged at the lower end of the first connecting leg 312, and the first fixing ear 3121 is provided with a first screw hole 3122. The second support frame 41 is provided with a second fixing ear 412, and the second fixing ear 412 is provided with a second screw hole 4122 corresponding to the first screw hole 3122, and the stator is provided with a third screw hole, and fasteners such as screws can pass through the first screw hole 3122, the third screw hole and the second screw hole 4122 to fix the first support frame 31 and the second support frame 41 to the stator.

[0066] Optionally, the first mounting seat 3111 is a first punched flange formed on the first mounting plate 311. The structure is simple and the processing is convenient.

[0067] Specifically, the cylinder assembly 2 includes a cylinder 21, a piston 22, a connecting rod 23 and a cylinder bracket 24. The cylinder 21 is arranged on the cylinder bracket 24, the piston 22 is movably arranged in the cylinder 21, the connecting rod 23 is used to connect the piston 22 and the crankshaft 5, and the cylinder bracket 24 is connected to the first support frame 31. Among them, the cylinder bracket 24 is used to support the cylinder 21, and cooperates with the first support frame 31 to support the crankshaft 5.

[0068] For example, in some embodiments of the present invention, reference Fig. 9 The first support frame 31 can be welded to the cylinder bracket 24, which has a simple structure and is easy to process. For example, in some other embodiments of the present invention, the first support frame 31 and the cylinder bracket 24 are integrally stamped. As a result, the processing technology of the first support frame 31 and the cylinder bracket 24 is simplified, and the overall structural strength of the first support frame 31 and the cylinder bracket 24 can be enhanced.

[0069] In some embodiments of the present invention, a concave portion 3112 is formed on the first mounting plate 311 and is concave in a direction away from the cylinder assembly 2, and the cylinder bracket 24 is connected to the bottom wall of the concave portion 3112. Figure 2 and Figure 4 A concave portion 3112 concave downward is formed on the first mounting plate 311, and the concave portion 3112 can be formed into a square groove structure. Thus, the overall height of the reciprocating compressor 100 can be reduced, and thus the overall volume of the reciprocating compressor 100 can be further reduced.

[0070] According to some embodiments of the present invention, the second support frame 41 is formed as an arc-shaped plate-like structure protruding in a direction away from the other axial end of the motor. Figure 3 and Figure 5 The second support frame 41 is formed into a downwardly protruding arc plate-shaped structure. The second fixing ears 412 can be arranged at both ends of the second support frame 41. Thus, a clearance groove can be formed on the second support frame 41 to prevent the second support frame 41 from interfering with other components of the reciprocating compressor 100.

[0071] In some embodiments of the present invention, the first support frame 31 and the second support frame 41 are both sheet metal parts. Specifically, the first support frame 31 and the second support frame 41 are obtained by sheet metal stamping. As a result, the stability and reliability of the first support frame 31 and the second support frame 41 are improved, and the damage of the first support frame 31 and the second support frame 41 caused by excessive impact pressure of the reciprocating compressor 100 is prevented, and the first support frame 31 and the second support frame 41 can be prevented from being rusted by water or oil stains, thereby improving the service life of the first support frame 31 and the second support frame 41.

[0072] Optionally, the thickness d of the sheet metal part satisfies: 2.0 mm ≤ d ≤ 4.0 mm. For example, the thickness of the sheet metal part may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. The sheet metal of the above size is used to stamp and produce the first support frame 31 and the second support frame 41. On the premise of meeting the strength of the first support frame 31 and the second support frame 41, the material input of the sheet metal is reduced, the difficulty of stamping is reduced, and the production cost of the first support frame 31 and the second support frame 41 is reduced to the greatest extent.

[0073] Other structures and operations of the reciprocating compressor 100 according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A reciprocating compressor, characterized in that: include: A motor, the motor comprising a stator and a rotor, the rotor being rotatably disposed in the stator; A cylinder assembly, wherein the cylinder assembly is arranged at one axial end of the motor; A first support assembly, the first support assembly is arranged at one axial end of the motor and connected to the cylinder assembly, the first support assembly comprises a first support frame and a first bearing, the first support frame is provided with a first mounting seat, the first bearing is riveted in the first mounting seat and the first bearing is rotatable relative to the first mounting seat; A second support assembly, the second support assembly is arranged at the other axial end of the motor, the second support assembly comprises a second support frame and a second bearing, the second support frame is provided with a second mounting seat, the second bearing is riveted in the second mounting seat and the second bearing is rotatable relative to the second mounting seat; A crankshaft, the crankshaft comprising a main shaft and a secondary shaft, the secondary shaft being connected to the main shaft, the main shaft being inserted into the rotor and having one axial end of the main shaft being connected to the first bearing and the other axial end being connected to the second bearing, and the secondary shaft being connected to the cylinder assembly; The first mounting seat is formed into a ring shape and the inner wall surface of the first mounting seat is formed into a spherical surface. The first bearing includes a first matching segment, and the outer peripheral surface of the first matching segment is formed into a spherical surface so that a spherical contact is formed between the outer peripheral surface of the first matching segment and the inner wall surface of the first mounting seat. The second mounting seat is formed into a ring shape and the inner wall surface of the second mounting seat is formed into a spherical surface. The second bearing includes a second matching segment, and the outer peripheral surface of the second matching segment is formed into a spherical surface so that a spherical contact is formed between the outer peripheral surface of the second matching segment and the inner wall surface of the second mounting seat. The first bearing further comprises a first connecting section, the inner circumference of the first connecting section being matched with the crankshaft; The inner diameter of the first matching section is greater than the inner diameter of the first connecting section.

2. The reciprocating compressor according to claim 1, characterized in that: The first matching section is located at one axial end of the first connecting section.

3. The reciprocating compressor according to claim 1, characterized in that: The first matching section is coaxially arranged with the first connecting section.

4. The reciprocating compressor according to any one of claims 1 to 3, characterized in that: The structure of the second bearing is the same as that of the first bearing.

5. The reciprocating compressor according to claim 1, characterized in that: The first support frame and the second support frame are respectively located at two axial ends of the stator, and both the first support frame and the second support frame are connected to the stator.

6. The reciprocating compressor according to claim 5, characterized in that: The first support frame includes a first mounting plate and a first connecting leg, one end of the first connecting leg is connected to the first mounting plate, and the other end is connected to the stator, and the first mounting seat is formed on the first mounting plate.

7. The reciprocating compressor according to claim 6, characterized in that: The first mounting seat is a first punching flange formed on the first mounting plate.

8. The reciprocating compressor according to claim 7, characterized in that: The cylinder assembly includes a cylinder, a piston, a connecting rod and a cylinder bracket. The cylinder is arranged on the cylinder bracket, the piston is movably arranged in the cylinder, the connecting rod is used to connect the piston and the crankshaft, and the cylinder bracket is connected to the first support frame.

9. The reciprocating compressor according to claim 8, characterized in that: A recessed portion that is recessed in a direction away from the cylinder assembly is formed on the first mounting plate, and the cylinder bracket is connected to a bottom wall of the recessed portion.

10. The reciprocating compressor according to claim 9, characterized in that The first support frame is connected to the cylinder bracket by welding, or the first support frame and the cylinder bracket are integrally stamped.

11. The reciprocating compressor according to claim 1, characterized in that The second support frame is formed as an arc-shaped plate-shaped structure protruding in a direction away from the other axial end of the motor.

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