Compressor connecting rod assembly, refrigerator compressor and refrigeration device

Abstract

The application discloses a compressor connecting rod assembly, a refrigerator compressor and a refrigeration device, and relates to the technical field of refrigerator compressors, wherein the compressor connecting rod assembly comprises a rod body and a piston, the rod body is provided with a first shaft hole for connecting a crankshaft, the center of the first end and the center of the second end are staggered in the axial direction of the first shaft hole, the piston is connected to the second end through a flexible connecting structure, and the technical scheme provided by the application can prolong the service life of the compressor connecting rod assembly.

Description

Technical Field

[0001] This invention relates to the field of refrigerator compressor technology, and particularly to a compressor connecting rod assembly, a refrigerator compressor, and a refrigeration device. Background Technology

[0002] Existing refrigeration compressors include a crankshaft, connecting rod, and piston. Driven by the rotation of the crankshaft, the crankshaft drives the piston to perform linear reciprocating motion through the connection between the connecting rod and the crankshaft, and the connection between the connecting rod and the piston. Due to unavoidable machining accuracy errors and the component forces caused by the connecting rod's own structure during force transmission, the connecting rod and piston are prone to wear, and even the connection between the connecting rod and the piston may break, resulting in reduced compressor efficiency and functional failure. Summary of the Invention

[0003] The main objective of this invention is to provide a compressor connecting rod assembly, a refrigerator compressor, and a refrigeration device, with the aim of extending the service life of the compressor connecting rod assembly.

[0004] To achieve the above objectives, the present invention provides a compressor connecting rod assembly comprising:

[0005] The rod body has a first end and a second end. The first end is provided with a first shaft hole for connecting a crankshaft. The centers of the first end and the second end are offset in the axial direction of the first shaft hole.

[0006] The piston is connected to the second end via a flexible connection structure.

[0007] In one embodiment, the flexible connection structure is configured as a flexible joint, with one end hinged to the second end and the other end hinged to the piston.

[0008] In one embodiment, the second end has a second shaft hole, and the axis of the second shaft hole is parallel to the axis of the first shaft hole.

[0009] In one embodiment, the wall thickness of the second shaft hole is greater than or equal to 2 mm;

[0010] And / or, the mating gap between the second end and the flexible connection structure is greater than or equal to 0.5 mm.

[0011] In one embodiment, the flexible joint includes a first connecting portion and a second connecting portion. The first connecting portion has a first pin hole for connecting the piston, and the second connecting portion has a second pin hole for engaging with the second shaft hole. The axis of the first pin hole is perpendicular to the axis of the second pin hole.

[0012] In one embodiment, the second connecting portion has a mounting groove on the side facing the rod, and the second end extends into the mounting groove;

[0013] And / or, the outer surface of the first connecting portion is configured as a curved surface.

[0014] In one embodiment, the radius of the first pin hole is R1, the radius of the second pin hole is R2, the wall thickness of the second pin hole is K, and the axial distance between the first pin hole and the second pin hole is U, where U-R1-R2-K≥2.5mm;

[0015] And / or, the second connecting portion is tapered toward the rod body;

[0016] And / or, the second end is tapered toward the second connecting portion.

[0017] In one embodiment, the flexible connection structure is configured as a spherical connector and formed at the second end, and the piston is provided with a spherical groove for the spherical connector to be inserted.

[0018] In one embodiment, the center height difference between the first end and the second end is H, where 5mm ≤ H ≤ 25mm;

[0019] And / or, the center width difference between the first end and the second end is L, 50mm≤L≤150mm.

[0020] In one embodiment, the rod is at least partially inclined.

[0021] The present invention also proposes a refrigerator compressor, which includes the compressor linkage assembly as described above.

[0022] In one embodiment, the refrigerator compressor includes a cylinder and a motor, the piston is movably mounted inside the cylinder, the motor is connected to a crankshaft, and the motor and the cylinder are arranged horizontally side by side.

[0023] The present invention also proposes a refrigeration device, which includes a refrigerator compressor as described above.

[0024] In the technical solution of this invention, the centers of the first end and the second end are axially offset in the first shaft hole to achieve adaptive assembly of the compressor connecting rod assembly within the refrigerator compressor. This ensures reliable crankshaft drive of the piston via the rod body, while simultaneously enhancing the flexibility and strength of the rod body, improving the transmission reliability and service life of the compressor connecting rod assembly. Furthermore, the flexible connection structure effectively ensures that the compressor connecting rod assembly has excess degrees of freedom during transmission, eliminating the component force that causes piston wobbling when the rod body transmits force. This reliably reduces the bending moment of the compressor connecting rod assembly during transmission, thereby reducing the possibility of wear on the rod body and piston, extending service life, and simultaneously reducing frictional loss between the rod body and piston, improving the structural reliability of the compressor connecting rod assembly, and enhancing the operating efficiency of the refrigerator compressor. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a structure of an embodiment of the compressor connecting rod assembly provided by the present invention;

[0027] Figure 2 for Figure 1 Front view of the connection between the central rod and the flexible joint;

[0028] Figure 3 for Figure 1 Top view of the connection between the central rod and the flexible joint;

[0029] Figure 4 for Figure 1 Schematic diagram of the middle rod;

[0030] Figure 5 for Figure 1 Schematic diagram of the structure of a flexible joint;

[0031] Figure 6 for Figure 1 A schematic diagram of the assembly of the compressor connecting rod assembly and the cylinder block;

[0032] Figure 7 This is an exploded view of another embodiment of the compressor connecting rod assembly provided by the present invention.

[0033] Explanation of icon numbers:

[0034] 10. Rod body; 11. First end; 111. First shaft hole; 12. Second end; 121. Second shaft hole; 122. Main body; 123. Slotted section; 13. Connecting body; 131. Inclined section; 132. First straight section; 133. Second straight section;

[0035] 20. Crankshaft; 21. Main shaft; 22. Eccentric shaft;

[0036] 30. Piston; 31. Through hole; 32. Spherical groove;

[0037] 40. Flexible joint; 41. First connecting part; 411. First pin hole; 42. Second connecting part; 421. Second pin hole; 422. Mounting groove; 43. First pin; 44. Second pin; 50. Ball joint;

[0038] 61. Cylinder block; 62. Bracket; 63. Clearance opening.

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] Existing refrigeration compressors include a crankshaft, connecting rod, and piston. Driven by the rotation of the crankshaft, the crankshaft drives the piston to perform linear reciprocating motion through the connection between the connecting rod and the crankshaft, and the connection between the connecting rod and the piston. Due to unavoidable machining accuracy errors and the component forces caused by the connecting rod's own structure during force transmission, the connecting rod and piston are prone to wear, and even the connection between the connecting rod and the piston may break, resulting in reduced compressor efficiency and functional failure.

[0044] To address the aforementioned technical problems, this invention proposes a compressor connecting rod assembly.

[0045] Please see Figures 1 to 7 In one embodiment of the present invention, the compressor connecting rod assembly includes a rod body 10 and a piston 30. The rod body 10 has a first end 11 and a second end 12. The first end 11 is provided with a first shaft hole 111 for connecting a crankshaft 20. In the axial direction of the first shaft hole 111, the centers of the first end 11 and the second end 12 are offset. The piston 30 is connected to the second end 12 through a flexible connection structure. This allows the compressor connecting rod assembly to have extra degrees of freedom during transmission, reduces frictional loss between the rod body 10 and the piston 30, improves the transmission efficiency of the compressor connecting rod assembly, and at the same time reduces the possibility of wear on the rod body 10 and the piston 30, extends service life, and improves the structural reliability of the compressor connecting rod assembly.

[0046] In the technical solution of this invention, the centers of the first end 11 and the second end 12 are axially offset in the first shaft hole 111 to achieve adaptive assembly of the compressor connecting rod assembly within the refrigerator compressor. This ensures reliable driving of the piston 30 by the crankshaft 20 through the rod 10, while simultaneously enhancing the flexibility and strength of the rod 10, improving the transmission reliability and service life of the compressor connecting rod assembly. Furthermore, the flexible connection structure effectively ensures that the compressor connecting rod assembly has excess degrees of freedom during transmission, eliminating the component force that causes the piston 30 to wobble when the rod 10 transmits force. This reliably reduces the bending moment of the compressor connecting rod assembly during transmission, thereby reducing the possibility of wear between the rod 10 and the piston 30, extending service life, reducing frictional loss between the rod 10 and the piston 30, improving the structural reliability of the compressor connecting rod assembly, and enhancing the operating efficiency of the refrigerator compressor.

[0047] It should be noted that the center of the first end 11 and the center of the second end 12 are offset, that is, there is a height difference in the axial direction of the first shaft hole 111. On the one hand, depending on the height requirements of the refrigerator compressor, the first end 11 and the second end 12 can be partially offset or completely offset in the axial direction of the first shaft hole 111 to adjust the relative height difference between the cylinder where the piston 30 is located and the center of the crankshaft 20 (or the motor connected to the crankshaft 20), improve the arrangement of the cylinder and the motor, and reduce the overall height of the refrigerator compressor. The flexible connection structure is an elastomer, and its material includes, but is not limited to, silicone, rubber, and plastic, so as to improve the ability to eliminate additional force while ensuring the reliable transmission of the flexible connection structure.

[0048] Please see Figures 1 to 6 In an embodiment of the present invention, the flexible connection structure is configured as a flexible joint 40, with one end hinged to the second end 12 and the other end hinged to the piston 30. Thus, during transmission, the piston 30 and the rod 10 can rotate relative to the flexible connection structure due to the hinge. The structure is flexible and can reliably adapt to the forces transmitted to the flexible joint 40 and the piston 30, while reducing stress concentration caused by the fixed connection, improving the durability and reliability of the compressor connecting rod assembly. Furthermore, combined with the characteristics of the flexible connection structure, it can reliably absorb and reduce the possibility of large contact pressure on the piston 30, thereby reducing friction loss and wear, and improving the operating efficiency and service life of the refrigerator compressor.

[0049] Specifically, in an embodiment of the present invention, the second end 12 is provided with a second shaft hole 121, and the axis of the second shaft hole 121 is parallel to the axis of the first shaft hole 111, that is, the axis of the first shaft hole 111 and the axis of the second shaft hole 121 are located in the same plane, which helps to simplify the force transmission between the rod 10 and the piston 30 and improve the transmission efficiency. Since the centers of the first end 11 and the second end 12 are offset, the connecting body 13 connecting the first end 11 and the second end 12 will not extend horizontally as a whole, and will generate a vertical force component to the flexible joint 40. Because the flexible joint 40 has elasticity and flexibility, it can ensure that the piston 30 is not affected by this component force during movement, thereby reliably reducing the possibility of wear at the upper and lower ends of the piston 30 due to excessive contact pressure, and reducing friction loss and wear. However, in other embodiments, the axis of the second shaft hole 121 is perpendicular to the axis of the first shaft hole 111, and the influence of this component force is eliminated by the flexible joint 40.

[0050] Furthermore, in an embodiment of the present invention, the wall thickness of the second shaft hole 121 is greater than or equal to 2 mm, thereby reliably ensuring the structural strength at the second end 12, and thus improving the connection reliability and transmission reliability between the second end 12 and the flexible joint 40; specifically, with Figure 4 As shown, when the end face of the second end 12 is an arc surface concentric with the second shaft hole 121, the radius of the second shaft hole 121 is R2, and the radius of the arc surface is R3. R3-R2=K≥2mm. Similarly, when the end face of the second end 12 is not an arc surface, the minimum distance between the end face and the hole wall of the second shaft hole 121 needs to be greater than or equal to 2mm. This reliably reduces the possibility of cracks or even breakage in the second end 12, extends the service life of the rod 10, and improves the structural strength of the second end 12.

[0051] Optionally, in an embodiment of the present invention, the fitting gap between the second end 12 and the flexible connection structure is greater than or equal to 0.5 mm. In this way, the fitting gap between the second end 12 and the flexible joint 40 can provide space for relative movement between the second end 12 and the flexible joint 40, reduce motion interference between the two, reduce friction loss and wear, and improve the transmission efficiency and service life of the rod 10 and the piston 30.

[0052] Please see Figures 2 to 3In an embodiment of the present invention, the flexible joint 40 includes a first connecting portion 41 and a second connecting portion 42. The first connecting portion 41 has a first pin hole 411 for connecting the piston 30, and the second connecting portion 42 has a second pin hole 421 for engaging with the second shaft hole 121. The axis of the first pin hole 411 is perpendicular to the axis of the second pin hole 421. It can be understood that the piston 30 has a through hole 31 that penetrates the piston 30. The through hole 31 is used to engage with the first pin hole 411 that extends into the piston 30 so that the first pin 43 can pass through. The piston 30 is connected to the flexible joint 40 through the through hole 31 and the first pin hole 411; the second shaft hole 121 is connected to the second pin hole 421 so that the second pin 44 passes through the second shaft hole 121 and the second pin hole 421 to complete the connection between the second end 12 and the flexible joint 40; since the axes of the first pin hole 411 and the second pin hole 421 are perpendicular, the degree of freedom between the piston 30 and the rod 10 can be increased, thereby ensuring that the compressor connecting rod assembly has extra degree of freedom during transmission, so as to eliminate the component force that causes the piston 30 to shake when the rod 10 transmits force. In this embodiment, the outer surface of the first connecting portion 41 is configured as a curved surface, meaning the first connecting portion 41 can be a cylinder extending along the axis of the first pin hole 411, allowing for a smooth transition between the first connecting portion 41 and the second connecting portion 42. In this case, the second connecting portion 42 can be a triangular prism, which not only ensures the connection function of the flexible joint 40 and improves its service life, but also reduces the material usage of the flexible joint 40 to a certain extent and lowers the possibility of interference. However, in other embodiments, both the first connecting portion 41 and the second connecting portion 42 are cylinders.

[0053] Specifically, in an embodiment of the present invention, the second connecting portion 42 has a mounting groove 422 on the side facing the rod 10, and the second end 12 extends into the mounting groove 422. The mounting groove 422 is located at the middle of the second connecting portion 42 and the opening faces the rod 10. At this time, the second end 12 is located between two oppositely arranged groove sidewalls on the mounting groove 422. That is, the second end 12 includes a main body portion 122 and a recessed portion 123 provided on the side of the main body portion 122. The recessed portion 123 is provided corresponding to the groove sidewall of the mounting groove 422, and the main body portion 122 extends into the mounting groove 422. The connection between the second end 12 and the second connecting portion 42 is realized by the second pin 44 passing through the second pin hole 421 that penetrates the second end 12 and the second connecting portion 42. However, in other embodiments, the side of the second connecting portion 42 facing the rod 10 has a mounting groove 422, the second end 12 is placed in the mounting groove 422, and the second end 12 is connected to the second pin hole 421 on the second connecting portion 42 by the second pin 44.

[0054] Specifically, in order to reduce motion interference, such as Figure 3As shown, the end face of the second connecting part 42 facing the rod body 10 is an arc surface concentric with the second pin hole 421, with a radius of R5. The side wall of the groove part 123 facing the second connecting part 42 is a clearance arc surface concentric with the second shaft hole 121, with a radius of R4, and satisfies R4-R5≥0.5mm. Similarly, the gap between the end face of the second end 12 and the bottom wall of the mounting groove 422 also needs to be greater than or equal to 0.5mm. Thus, while ensuring a compact connection between the flexible joint 40 and the second end 12, it facilitates smooth relative movement between the second end 12 and the flexible joint 40 during transmission, thereby ensuring that the piston 30 is only subjected to horizontal force and performs translational movement.

[0055] Please see Figure 2 and Figure 4 In an embodiment of the present invention, the radius of the first pin hole 411 is R1, the radius of the second pin hole 421 is R2, and the wall thickness of the second pin hole 421 is K. The axial distance between the first pin hole 411 and the second pin hole 421 is U, and U-R1-R2-K≥2.5mm. It can be understood that U-R1-R2-K=U-R1-R3. The sum of the distance from the wall of the first pin hole 411 to the bottom wall of the mounting groove 422 and the fitting clearance between the bottom wall of the mounting groove 422 and the second end 12 can be obtained. This can ensure the structural strength at the first pin hole 411, improve the connection reliability and transmission reliability between the flexible joint 40 and the piston 30, and at the same time ensure the smooth movement between the flexible joint 40 and the second end 12, reducing the possibility of motion interference.

[0056] Optionally, in an embodiment of the present invention, the second connecting portion 42 is tapered toward the rod body 10; and / or the second end 12 is tapered toward the second connecting portion 42. Such a configuration can reduce the volume of the second end 12 and the second connecting portion 42 to a certain extent, and at the same time, help reduce the possibility of motion interference and improve the smoothness of movement between the flexible joint 40 and the second end 12.

[0057] Please see Figure 7 In an embodiment of the present invention, the flexible connection structure is configured as a spherical connector 50 and formed at the second end 12. The piston 30 is provided with a spherical groove 32 for the spherical connector 50 to be inserted. Thus, during transmission, the piston 30 and the rod 10 rotate relative to each other through the cooperation of the spherical connector 50 and the spherical groove 32. Due to its relatively rich degree of freedom, it can reliably adapt to the force transmitted to the piston 30, reduce the possibility of generating large contact pressure on the piston 30, thereby reducing friction loss and wear, and improving the operating efficiency and service life of the refrigerator compressor.

[0058] Among them, the spherical connector 50 and the second end 12 are fixed as a whole, which effectively simplifies the structure of the compressor connecting rod assembly, reduces the number of parts and weight, reduces assembly steps, and improves assembly efficiency; while the fit clearance between the spherical connector 50 and the spherical groove 32 is greater than or equal to 0.5mm, ensuring the smooth relative movement of the spherical connector 50 and the spherical groove 32.

[0059] Please see Figure 2 In an embodiment of the present invention, the center height difference between the first end 11 and the second end 12 is H, where 5mm ≤ H ≤ 25mm. It is understood that the crankshaft 20 is connected to the stator of the motor and partially protrudes from the upper or lower end face of the motor in order to connect and drive the compressor connecting rod assembly. Benefiting from the structure of the rod body 10, the piston 30 is movably mounted on the cylinder, and the cylinder and the motor are arranged horizontally side by side, so that the cylinder is not higher than the crankshaft 20 end protruding from the upper end face. At this time, the first end 11 is located above the second end 12, or not lower than the crankshaft 20 end protruding from the lower end face. At this time, the first end 1121 is located below the second end 1222. That is, the positional relationship between the first end 11 and the second end 12 depends on whether the rod body 10 is upright or inverted. Furthermore, by limiting the center height difference H between the first end 11 and the second end 12 to satisfy: 5mm ≤ H ≤ 25mm, the relative height between the cylinder and the motor can be reliably reduced. This relative height is the center height difference between the two, thereby reducing the overall height of the refrigerator compressor, which can be reduced to below 123cm.

[0060] When H < 5mm, the center height difference between the first end 11 and the second end 12 is small. Taking the first end 11 being higher than the second end 12 as an example, the relative height between the cylinder and the motor is large, and the cylinder with the piston 30 is still at the highest position of the refrigerator compressor, which is not conducive to reducing the overall height of the refrigerator compressor. When H > 25mm, the center height difference between the first end 11 and the second end 12 is large, and the force transmission motion of the rod 10 is easily interfered with by the surrounding structure, and the overall structural rigidity of the rod 10 cannot be reliably guaranteed. Therefore, limiting 5mm ≤ H ≤ 25mm can not only guarantee the structural rigidity of the rod 10, extend the service life of the rod 10, and ensure the reliability of force transmission, but also reliably reduce the overall height of the refrigerator compressor and reduce the space occupied by the refrigerator compressor in the refrigeration equipment.

[0061] Specifically, the center height difference between the first end 11 and the second end 12 may take values ​​including, but not limited to, 5mm, 10mm, 13mm, 15mm, 16mm, 19mm, 20mm, 22mm, 24mm, and 25mm. In other embodiments, the center height difference may be greater than 25mm or less than 5mm, provided that the overall height and center of gravity allow it.

[0062] Please see Figure 2In the embodiments of the present invention, the center width difference between the first end 11 and the second end 12 is L, 50mm≤L≤150mm, which reliably reduces the possibility of interference between the rod 10 and the cylinder, motor, etc., and improves the reliability of the transmission of the rod 10. At the same time, in conjunction with the limitation of the center height difference, the structural rigidity and service life of the rod 10 are further improved. It can be understood that when L<50mm, the center width difference between the first end 11 and the second end 12 is too small, resulting in the connecting body 13 between the first end 11 and the second end 12 being too short. Since there is a center height difference between the first end 11 and the second end 12, and the cylinder is located on the side of the motor, the cylinder is too close to the motor, which may affect the heat dissipation of the motor and the connection between the rod 10 and the piston 30. When L>150mm, the center width difference between the first end 11 and the second end 12 is too large, resulting in the connecting body 13 between the first end 11 and the second end 12 being too long, which may affect the transmission stability and structural rigidity of the rod 10.

[0063] Specifically, the center width difference between the first end 11 and the second end 12 may take values ​​including, but not limited to, 50mm, 60mm, 90mm, 100mm, 110mm, 120mm, 140mm, and 150mm. In other embodiments, the center width difference may be greater than 150mm or less than 50mm, provided that the overall height and center of gravity allow it.

[0064] Optionally, in an embodiment of the present invention, the rod 10 is at least partially inclined, wherein the rod 10 includes a connecting body 13 located between the first end 11 and the second end 12. In this case, at least part of the connecting body 13 is inclined to accommodate the center height difference between the first end 11 and the second end 12, thereby improving the strength and rigidity of the rod 10, reducing boundary friction, wear and jamming caused by deformation, improving mechanical efficiency and reliability, and also reducing noise.

[0065] Please see Figures 1 to 2 In an embodiment of the present invention, the connecting body 13 includes an inclined section 131 and a first straight section 132 and a second straight section 133 disposed at both ends of the inclined section 131. The first straight section 132 has a first end 11 at the end away from the inclined section 131, and the second straight section 133 has a second end 12 at the end away from the inclined section 131. This facilitates the adaptive adjustment of the rod 10, improves the transmission reliability of the rod 10, and reduces the possibility of friction and wear. However, in other embodiments, the connecting body 13 only includes the inclined section 131, that is, the two ends of the inclined section 131 are respectively provided with a first end 11 and a second end 12.

[0066] Specifically, in the embodiments of the present invention, the outline of the inclined segment 131 is a straight line segment; and / or, the outline of the inclined segment 131 is an arc segment. It is understood that the inclined segment 131 can be formed by a straight line segment or multiple straight line segments, or by multiple continuously connected arc segments, or by a connection of straight line segments and arc segments. Specifically, the arc segment can be a circular arc segment, a conical arc segment, an elliptical arc segment, or a spline curve segment.

[0067] Please see Figure 6 In an embodiment of the present invention, the cylinder includes a cylinder body 61 and a cylinder head that cooperates with the cylinder body 61 to form a compression space with an opening facing the motor. The compression space is used to fill with refrigerant and to install a piston 30 capable of linear motion. A bracket 62 is connected to the side of the cylinder body 61 away from the cylinder head. This bracket 62 is used to fix the motor so that the cylinder body 61 and the motor are arranged horizontally side by side. The bracket 62 and the cylinder body 61 can be fixed as a whole by casting, machining, or other methods to improve assembly efficiency and simplify assembly steps. Simultaneously, it can effectively ensure that the cylinder body 61, formed by the bracket 62 and the cylinder, has good strength to support the compression motion of the piston 30 and the reliable assembly of the motor. However, in other embodiments, the cylinder body 61 and the bracket 62 are separate components.

[0068] Furthermore, in an embodiment of the present invention, a clearance opening 63 for avoiding the rod 10 is provided at the connection between the bracket 62 and the cylinder 61. It can be understood that because the eccentric shaft 22 of the crankshaft 20 connected to the first end 11 protrudes from the bracket 62, the center of the first end 11 is located on one side of the bracket 62. Combined with the center height difference between the first end 11 and the second end 12, the center of the second end 12 is located on the same plane as the center of the bracket 62, or on the other side of the bracket 62. By providing a clearance opening 63 at the connection between the bracket 62 and the cylinder 61, when the first end 11 is connected to the eccentric shaft 22 of the crankshaft 20, the second end 12 and the connecting body 13 can pass through the clearance opening 63 and connect the second end 12 to the piston 30, ensuring the transmission of force and reliable driving of the piston 30.

[0069] The present invention also proposes a refrigerator compressor, which includes a compressor connecting rod assembly. The specific structure of the compressor connecting rod assembly is as described in the above embodiments. Since the refrigerator compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0070] Specifically, in an embodiment of the present invention, the refrigerator compressor includes a cylinder and a motor. The piston 30 is movably mounted inside the cylinder, and a crankshaft 20 is connected to the motor. The motor and the cylinder are arranged horizontally side by side. It can be understood that the horizontal arrangement of the motor and the cylinder, compared to the cylinder being located above or below the motor, can reduce the overall height of the refrigerator compressor to a certain extent, thereby reducing the space occupied by the refrigerator compressor in the refrigeration equipment. This provides more storage space for storing food and other items, as well as assembly space for installing other components. It also lowers the center of gravity of the refrigerator compressor, thereby reducing noise. At the same time, the refrigerator compressor has a larger surface area to volume ratio due to its thinness, which helps to dissipate heat more effectively, thereby improving the operating efficiency and service life of the refrigerator compressor.

[0071] The motor and cylinder are arranged horizontally side by side, and the crankshaft 20 on the motor and the piston 30 in the cylinder are connected by a rod 10. The centers of the first end 11 connecting the crankshaft 20 and the second end 12 connecting the piston 30 are offset along the axial direction of the first shaft hole 111 of the first end 11. This reliably ensures that the crankshaft 20 drives the piston 30 reliably through the rod 10. At the same time, it reliably reduces the relative height between the cylinder and the motor, thereby reducing the overall height of the refrigerator compressor, which can be reduced to below 123cm.

[0072] This invention also proposes a refrigeration device, which includes a refrigerator compressor. The specific structure of the refrigerator compressor is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The refrigeration device can be configured as a refrigerator, freezer, or other similar equipment.

[0073] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A compressor connecting rod assembly, characterized in that, include: The rod body has a first end and a second end. The first end has a first shaft hole for connecting to a crankshaft. The centers of the first end and the second end are offset along the axial direction of the first shaft hole. The piston is connected to the second end via a flexible connection structure.

2. The compressor connecting rod assembly as described in claim 1, characterized in that, The flexible connection structure is configured as a flexible joint, with one end hinged to the second end and the other end hinged to the piston.

3. The compressor connecting rod assembly as described in claim 2, characterized in that, The second end has a second shaft hole, and the axis of the second shaft hole is parallel to the axis of the first shaft hole.

4. The compressor connecting rod assembly as described in claim 3, characterized in that, The wall thickness of the second shaft hole is greater than or equal to 2 mm; And / or, the mating gap between the second end and the flexible connection structure is greater than or equal to 0.5 mm.

5. The compressor connecting rod assembly as described in claim 3, characterized in that, The flexible joint includes a first connecting part and a second connecting part. The first connecting part has a first pin hole for connecting the piston, and the second connecting part has a second pin hole for engaging with the second shaft hole. The axis of the first pin hole is perpendicular to the axis of the second pin hole.

6. The compressor connecting rod assembly as described in claim 5, characterized in that, The second connecting part has a mounting groove on the side facing the rod body, and the second end extends into the mounting groove; And / or, the outer surface of the first connecting portion is configured as a curved surface.

7. The compressor connecting rod assembly as described in claim 5, characterized in that, The radius of the first pin hole is R1, the radius of the second pin hole is R2, and the wall thickness of the second pin hole is K. The axial distance between the first pin hole and the second pin hole is U, where U-R1-R2-K≥2.5mm. And / or, the second connecting portion is tapered toward the rod body; And / or, the second end is tapered toward the second connecting portion.

8. The compressor connecting rod assembly as claimed in claim 1, characterized in that, The flexible connection structure is configured as a spherical connector and is formed at the second end, and the piston is provided with a spherical groove for the spherical connector to be inserted.

9. The compressor connecting rod assembly as claimed in claim 1, characterized in that, The height difference between the center of the first end and the second end is H, where 5mm ≤ H ≤ 25mm; And / or, the center width difference between the first end and the second end is L, 50mm≤L≤150mm.

10. The compressor connecting rod assembly as claimed in any one of claims 1 to 9, characterized in that, The rod is at least partially inclined.

11. A refrigerator compressor, characterized in that, Includes the compressor connecting rod assembly as described in any one of claims 1 to 10.

12. The refrigerator compressor as described in claim 11, characterized in that, The refrigerator compressor includes a cylinder and a motor. The piston is movably installed inside the cylinder, and a crankshaft is connected to the motor. The motor and the cylinder are arranged horizontally side by side.

13. A refrigeration device, characterized in that, Includes the refrigerator compressor as described in claim 11 or 12.

Images