Crankshaft with drainage oil way structure and compressor

Abstract

The crankshaft with the drainage oil way structure comprises a main shaft part, an eccentric part and a short shaft part, a spiral oil groove and an oil pumping groove inlet are formed in the main shaft part, the top of the short shaft part is a short shaft upper end face, a first eccentric oil hole is formed in the short shaft part, and a second eccentric oil hole is formed in the short shaft part. One end of the spiral oil groove is communicated with a first eccentric oil hole, the side edge of the first eccentric oil hole is communicated with a second eccentric oil hole, and when the crankshaft is in a vertical state, the upper end face of the short shaft and the horizontal plane are arranged in a non-parallel included angle state; through the optimized and improved design of the crankshaft, the upper end face of the short shaft of the short shaft part of the crankshaft is processed into the inclined plane or the inclined curved surface which forms a certain included angle with the horizontal plane, so that when the crankshaft pumps oil to the top of the short shaft, lubricating oil is thrown out along the direction of the inclined plane, and an oil path can play a certain drainage role; therefore, the beneficial effects of improving the crankshaft lubricating effect and prolonging the effective service life of the crankshaft are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft equipment, and more specifically, to a crankshaft and a compressor with a drainage oil passage structure. Background Art

[0002] The compressor crankshaft is an important moving part inside the compressor, mainly responsible for converting the torque input from the outside into a reciprocating motion, so as to drive the piston to work. It not only bears the periodically changing gas force and inertia force from the connecting rod, but also transmits the power to the piston through the connecting rod to realize the compression of the gas.

[0003] During the operation of the crankshaft, good lubrication is required to reduce wear and friction. Therefore, oil holes are usually drilled inside the crankshaft to transport lubricating oil to parts such as the main journal and the connecting rod journal for lubrication.

[0004] However, in the prior art, the upper end surfaces of the short shafts in the short shaft part of the crankshaft are all horizontal planes, which cannot effectively drain the oil passage, and thus there is a technical problem of unsatisfactory lubrication effect. Summary of the Utility Model

[0005] In view of the above technical problems in the related art, the present utility model provides a crankshaft and a compressor with a drainage oil passage structure, which can overcome the above-mentioned deficiencies of the prior art.

[0006] To achieve the above technical purpose, the technical solution of the present utility model is realized as follows:

[0007] In a second aspect, the present utility model provides a crankshaft with a drainage oil passage structure;

[0008] The crankshaft and the compressor with the drainage oil passage structure include a main shaft part, an eccentric part and a short shaft part. A spiral oil groove and a pump oil groove inlet are provided on the main shaft part. The top of the short shaft part is the upper end surface of the short shaft. A first eccentric oil hole is provided inside the short shaft part. One end of the spiral oil groove is connected to the first eccentric oil hole. A second eccentric oil hole is communicated with the side of the first eccentric oil hole. In the vertical state of the crankshaft, the upper end surface of the short shaft is set at a non-parallel angle state with the horizontal plane.

[0009] Further, in the vertical state of the crankshaft, a transition arc surface is provided at the junction of the edge of the upper end surface of the short shaft, which is at a relatively far vertical distance from the eccentric part, and the side wall of the short shaft part.

[0010] Further, the edge part of the upper end surface of the short shaft facing the eccentric part is obliquely arranged, and the upper end surface of the short shaft is a curved surface concave toward the eccentric part.

[0011] Further, the upper end surface of the short shaft is obliquely arranged towards the center part of the eccentric part, and the upper end surface of the short shaft is a curved surface concave towards the eccentric part.

[0012] Further, the upper end surface of the short shaft is obliquely arranged towards the edge part of the eccentric part, and the upper end surface of the short shaft is a straight surface.

[0013] Further, the upper end surface of the short shaft is obliquely arranged towards the center part of the eccentric part, and the upper end surface of the short shaft is a straight surface.

[0014] In a second aspect, the present invention provides a compressor;

[0015] The compressor includes a crankshaft with a drainage oil path structure as described in any one of the above.

[0016] The beneficial effects of the present invention: Through the optimized and improved design of the product of the present invention, the upper end surface of the short shaft part of the crankshaft is processed into an inclined plane or an inclined curved surface with a certain angle with the horizontal plane, so that when the crankshaft pumps oil to the top of the short shaft, the lubricating oil will be thrown out along the inclined plane direction, and the oil path can play a certain drainage role, thereby achieving the beneficial effects of improving the lubrication effect of the crankshaft and extending the effective service life of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is the front view of the first inclined curved surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention;

[0019] Figure 2 It is the side view of the first inclined curved surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention;

[0020] Figure 3 It is the partial three-dimensional view of the first inclined curved surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention;

[0021] Figure 4 It is the front view of the second inclined curved surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention;

[0022] Figure 5It is a partial perspective view of the second oblique curved surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present utility model;

[0023] Figure 6 It is a front view of the first oblique straight surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present utility model;

[0024] Figure 7 It is a partial perspective view of the first oblique straight surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present utility model;

[0025] Figure 8 It is a front view of the second oblique straight surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present utility model;

[0026] Figure 9 It is a partial perspective view of the second oblique straight surface embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present utility model;

[0027] In the figure: 1, main shaft part; 2, eccentric part; 3, short shaft part; 301, upper end surface of the short shaft; 302, first eccentric oil hole; 303, second eccentric oil hole; 304, transition arc surface; 4, spiral oil groove; 5, pump oil groove inlet. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0029] It should be understood that in the description of the embodiments of the present invention, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of 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. Therefore, it should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present invention, "several" means two or more, unless otherwise specifically defined.

[0030] In a first aspect, as Figures 1-9 shown, a crankshaft with a drainage oil path structure according to an embodiment of the present invention includes a main shaft portion 1, an eccentric portion 2, and a short shaft portion 3. A spiral oil groove 4 and a pump oil groove inlet 5 are provided on the main shaft portion 1. The top of the short shaft portion 3 is the upper end face 301 of the short shaft. A first eccentric oil hole 302 is provided inside the short shaft portion 3. One end of the spiral oil groove 4 is communicated with the first eccentric oil hole 302. A second eccentric oil hole 302 is communicated with the side of the first eccentric oil hole 302. In the vertical state of the crankshaft, the upper end face 301 of the short shaft is set at a non-parallel angle state with the horizontal plane.

[0031] In a specific embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention, in the vertical state of the crankshaft, a transition arc surface 304 is provided at the junction of the edge of the upper end face 301 of the short shaft, which is at a relatively far vertical distance from the eccentric portion 2, and the side wall of the short shaft portion 3.

[0032] In a specific embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention, in a specific embodiment, the edge portion of the upper end face 301 of the short shaft facing the eccentric portion 2 is obliquely arranged, and the upper end face 301 of the short shaft is a curved surface concave toward the eccentric portion 2.

[0033] In a specific embodiment of a crankshaft with a drainage oil path structure according to an embodiment of the present invention, in a specific embodiment, the edge portion of the upper end face 301 of the short shaft facing the center of the eccentric portion 2 is obliquely arranged, and the upper end face 301 of the short shaft is a curved surface concave toward the eccentric portion 2.

[0034] According to a crankshaft with a drainage oil circuit structure according to an embodiment of the present invention, in a specific embodiment, the upper end surface 301 of the short shaft is obliquely arranged towards the edge portion of the eccentric portion 2, and the upper end surface 301 of the short shaft is a straight surface.

[0035] According to a crankshaft with a drainage oil circuit structure according to an embodiment of the present invention, in a specific embodiment, the upper end surface 301 of the short shaft is obliquely arranged towards the center portion of the eccentric portion 2, and the upper end surface 301 of the short shaft is a straight surface.

[0036] In a second aspect, a compressor according to an embodiment of the present invention includes any one of the above-mentioned crankshafts with a drainage oil circuit structure.

[0037] In order to facilitate the understanding of the above technical solution of the present invention, the above technical solution of the present invention will be described in detail below through specific working principles.

[0038] During specific use, according to a crankshaft with a drainage oil circuit structure according to the present invention, a part of the top of the short shaft portion 3 of the crankshaft is modified. Different from the common horizontal plane, the top of the short shaft portion 3 of the crankshaft is processed into a short shaft upper end surface 301 inclined plane having a certain angle with the horizontal plane. The short shaft upper end surface 301 can be an inclined plane or a curved surface. The inclination degree, inclination direction of the inclined plane of the short shaft upper end surface 301 or the curvature of the curved surface are adjusted according to the amount of oil pumped by the crankshaft and the path of the oil circuit.

[0039] The inclined plane setting of the short shaft upper end surface 301 can play a certain role in draining the oil circuit. When the compressor is running and the crankshaft pumps oil to the top of the short shaft portion 3, the lubricating oil will be thrown out along the inclined plane direction of the short shaft upper end surface 301, and the splashing direction can be adjusted by adjusting the inclined plane direction, inclination degree or curved surface curvature.

[0040] In summary, by means of the above technical solution of the present invention, through the optimized and improved design of the product of the present invention, the short shaft upper end surface of the short shaft portion of the crankshaft is processed into an inclined plane or an inclined curved surface having a certain angle with the horizontal plane, so that when the crankshaft pumps oil to the top of the short shaft, the lubricating oil will be thrown out along the inclined plane direction, and the oil circuit can play a certain role in draining, thereby achieving the beneficial effects of improving the lubrication effect of the crankshaft and extending the effective service life of the crankshaft.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crankshaft with an oil drainage path structure, characterized in that: The crankshaft comprises a main shaft portion (1), an eccentric portion (2) and a short shaft portion (3); the main shaft portion (1) is provided with a spiral oil groove (4) and a pump oil groove inlet (5); the top of the short shaft portion (3) is a short shaft upper end surface (301); a first eccentric oil hole (302) is provided inside the short shaft portion (3); one end of the spiral oil groove (4) is connected to the first eccentric oil hole (302); a second eccentric oil hole (303) is provided on the side of the first eccentric oil hole (302); and when the crankshaft is in a vertical state, the short shaft upper end surface (301) is arranged at a non-parallel angle to a horizontal plane.

2. The crankshaft with an oil drainage path structure according to claim 1, characterized in that: When the crankshaft is in a vertical state, a transition arc surface (304) is provided at the junction between the edge of the upper end surface (301) of the short shaft which is vertically farther from the eccentric portion (2) and the side wall of the short shaft portion (3).

3. The crankshaft with an oil drainage path structure according to claim 2, characterized in that: The upper end surface (301) of the short shaft is arranged obliquely toward the edge of the eccentric portion (2), and the upper end surface (301) of the short shaft is a curved surface concave toward the eccentric portion (2).

4. The crankshaft with an oil drainage path structure according to claim 2, characterized in that: The upper end surface (301) of the short shaft is arranged obliquely toward the center of the circle of the eccentric portion (2), and the upper end surface (301) of the short shaft is a curved surface concave toward the eccentric portion (2).

5. The crankshaft with an oil drainage path structure according to claim 2, characterized in that: The upper end surface (301) of the short shaft is arranged obliquely toward the edge of the eccentric portion (2), and the upper end surface (301) of the short shaft is a straight surface.

6. The crankshaft with an oil drainage path structure according to claim 2, characterized in that: The upper end surface (301) of the short shaft is arranged obliquely toward the center of the circle of the eccentric portion (2), and the upper end surface (301) of the short shaft is a straight surface.

7. A compressor, characterized in that: A crankshaft with an oil drainage path structure comprising any one of claims 1-6.

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