Compressor crankshaft capable of being quickly oiled

Abstract

The utility model relates to the technical field of crankshafts, in particular to a fast oiling compressor crankshaft which comprises a first bearing shaft, a first crank arm, a connecting rod journal, a second crank arm, a second bearing shaft and a power shaft which are fixedly arranged in sequence, and an eccentric groove is formed in one side end face of the second crank arm; the eccentric groove is of an arc-shaped structure, extends in the length direction of the second crank arm body and is used for throwing lubricating oil in the compressor in the direction away from the second crank arm, and the maintenance cost of the crankshaft can be reduced while the crankshaft can be lubricated through rapid oiling.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crankshaft, and the specific field is a compressor crankshaft of quick oiling. BACKGROUND

[0002] In the compressor, the crankshaft is a kind of important mechanical parts, and its main function is to convert reciprocating motion into rotary motion, so that the kinetic energy of piston is converted into the power output by engine. In order to ensure the normal operation of compressor, the crankshaft must be fully lubricated, and the existing method, for example, the patent with the announcement number CN112523996B discloses a kind of compressor crankshaft, by being set up in the crankshaft inside the oil storage cavity and main oil circuit that are interconnected, spiral oil groove is set on the main shaft, main oil circuit and oil groove are communicated by multiple oil holes, realize quick oiling, but along with the continuous operation of compressor, the debris generated between parts makes lubricating oil thick, and the oil hole distributed on the crankshaft can be blocked, so the crankshaft with such structure needs to be maintained in time, which directly increases the use cost of compressor. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a kind of compressor crankshaft of quick oiling, it can be in quick oiling simultaneously with the lubrication of crankshaft also can reduce the maintenance cost of crankshaft.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of compressor crankshaft of quick oiling, including the first bearing shaft, first crank arm, connecting rod journal, second crank arm, second bearing shaft and power shaft that are sequentially fixedly arranged, one side end face of the second crank arm is provided with eccentric slot;The eccentric slot is arc-shaped structure and extends along the length direction of second crank arm body, to throw the lubricating oil inside compressor in the direction away from second crank arm.

[0005] Preferably, the lower side wall of the eccentric slot is composed of a guide portion and an inclined portion, and the inclined portion is connected between the outer end surface of the second crank arm body and the guide portion.

[0006] Preferably, the inclination angle of the inclined portion with respect to the outer end surface of the second crank arm body is in the range of 30° to 45°.

[0007] Preferably, the lower end of the eccentric slot is located at the lower end of the second crank arm body.

[0008] Preferably, the eccentric slot is located at the lower part of the outer end of the second crank arm body.

[0009] Preferably, the width of the eccentric slot gradually decreases in the direction approaching the center of the power shaft.

[0010] Preferably, the contraction angle of the eccentric slot is not greater than 20°.

[0011] Preferably, the eccentric slot is provided with a plurality; a plurality of eccentric slots around the power shaft axis distribution.

[0012] Preferably, the lower part of the second crank arm is a half-circular pie structure.

[0013] Preferably, the first crank arm and the second crank arm are the same structure.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] By setting the tapered eccentric slot on the outer end surface of the crank arm, the bottom wall of the eccentric slot is composed of a guide portion and an inclined portion, after the compressor starts, the lubricating oil at the bottom of the case can quickly enter the eccentric slot by inertia, and then under the action of centrifugal force and the lower side wall of the eccentric slot, it is thrown away from the direction of the outer end surface of the second crank arm, realizing the purpose of quickly lubricating the crankshaft. Compared with the oil hole opening scheme in the prior art, the crankshaft does not exist the situation of being blocked in the running process, so the maintenance cost of the crankshaft can also be directly reduced.

[0016] The tapered eccentric slot is set on the outer end surface of the crank arm, which can also reduce the weight of the crank arm and reduce the production cost of the crankshaft. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the structure of the crankshaft of the utility model as a whole;

[0018] Figure 2 It is a schematic view of the structure of the crankshaft of the utility model as a whole; Figure 1 It is a schematic view of the structure of the crankshaft of the utility model as a whole;

[0019] Figure 3 It is a schematic view of the structure of the crankshaft of the utility model as a whole;

[0020] In the figure: 1 first bearing shaft, 2 first crank arm, 3 connecting rod journal, 4 second crank arm, 5 second bearing shaft, 6 power shaft, 41 eccentric slot, 411 guide portion, 412 inclined portion. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are described in detail below in combination with the drawings, so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in combination with its preferred specific embodiments, these embodiments are only illustrative, not limiting the scope of the utility model.

[0022] Reference Figures 1-3The utility model discloses an embodiment, a kind of compressor crankshaft of quick oiling, comprising sequentially fixed first bearing shaft 1, first crank arm 2, connecting rod journal 3, second crank arm 4, second bearing shaft 5 and power shaft 6, wherein, first bearing shaft 1, second bearing shaft 5 and power shaft 6 are coaxial, first crank arm 2 and second crank arm 4 are set to each other and both structures are same;The outer end surface lower part of first crank arm 2 and second crank arm 4 is all set with eccentric groove 41 for throwing lubricating oil, after the start of compressor, lubricating oil can climb along eccentric groove 41 then throw by centrifugal force in large range, realize the purpose of quick lubricating crankshaft, compared with the scheme of oil hole in the shaft in prior art, the crankshaft does not exist the situation of being blocked in the process of operation, so maintenance cost of crankshaft can also be directly reduced.

[0023] Specifically, take second crank arm 4 as an example, the lower part of second crank arm 4 is in half circle cake structure, eccentric groove 41 is set in the lower end of second crank arm 4 body and extends to the middle part of second crank arm 4 body, when compressor starts, second crank arm 4 can be immersed in the lubricating oil in the bottom of compressor case after rotating, in addition, the slot of eccentric groove 41 is located at the lower end of second crank arm 4 body, so that lubricating oil can enter eccentric groove 41 more smoothly;In the embodiment, the whole of eccentric groove 41 is arc structure, and the inner arc of eccentric groove 41 is towards the rotating direction of crankshaft, and the order is also to make lubricating oil enter eccentric groove 41 more smoothly.

[0024] Further, the eccentric groove 41 has an upper side wall, a bottom wall and a lower side wall, wherein the lower side wall is composed of a guide portion 411 and an inclined portion 412, and the inclined portion 412 is connected between the outer end surface of the second crank arm 4 body and the guide portion 411; the guide portion 411 guides the lubricating oil into the eccentric groove 41 along the direction in which the eccentric groove 41 is formed; the inclined portion 412 is used for throwing the lubricating oil in the eccentric groove 41 in the direction away from the outer end surface of the second crank arm 4 under the action of centrifugal force; it should be noted that the guide portion 411 is in a curved surface structure, and the axis thereof is not coaxial with the crankshaft body.

[0025] In one embodiment, the inclined portion 412 has an inclination angle with respect to the outer end surface of the second crank arm 4 body in the range of 30° to 45°.

[0026] In one embodiment, the inner end surface of the second crank arm 4 can also be provided with the eccentric groove 41.

[0027] In one embodiment, the width of the eccentric groove 41 gradually decreases in the direction approaching the shaft center of the power shaft 6, and the benefit of such tapering is that, after the lubricating oil enters the eccentric groove 41, the pressure gradually increases in the tapering flow channel, the flow rate of the lubricating oil increases, and the lubricating oil has a wider spreading range, because the lubricating oil cannot be compressed. In addition, in practice, the contraction angle of the eccentric groove 41 is not greater than 20°.

[0028] In one embodiment, in order to achieve better lubrication effect, the eccentric groove 41 is provided with two, and the two eccentric grooves 41 are distributed around the shaft center of the power shaft 6, and the eccentric grooves 41 at different positions can temporarily store different volumes of lubricating oil in the up-and-down position of the second crank arm 4, which is beneficial to rapid oiling after the compressor starts.

[0029] Through the technical scheme, by providing the tapering eccentric groove on the outer end surface of the crank arm, the bottom wall of the eccentric groove is composed of a guide portion and an inclined portion, after the compressor starts, the lubricating oil at the bottom of the case can quickly enter the eccentric groove by inertia, and then under the action of centrifugal force and the lower side wall of the eccentric groove, it is spread in the direction away from the outer end surface of the second crank arm, achieving the purpose of quickly lubricating the crankshaft. Compared with the prior art of providing an oil hole on the shaft, the crankshaft in the present application cannot be blocked during operation, so the maintenance cost of the crankshaft can also be directly reduced.

[0030] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A quick-oiling compressor crankshaft, comprising a first bearing shaft (1), a first crank arm (2), a connecting rod journal (3), a second crank arm (4), a second bearing shaft (5) and a power shaft (6) fixed in sequence, characterized in that: One side end surface of the second crank arm (4) is provided with an eccentric groove (41); the eccentric groove (41) is in arc structure and extends along the length direction of the second crank arm (4) body, so as to throw the lubricating oil in the compressor to the direction away from the second crank arm (4).

2. A quick-oiling compressor crankshaft as in claim 1, wherein: The lower side wall of the eccentric groove (41) is composed of a guide part (411) and an inclined part (412), and the inclined part (412) is connected between the outer end surface of the second crank arm (4) body and the guide part (411).

3. A quick-oiling compressor crankshaft as set forth in claim 2 wherein: The inclined angle of the inclined part (412) relative to the outer end surface of the second crank arm (4) body ranges between 30° and 45°.

4. A quick-oiling compressor crankshaft as set forth in claim 1 wherein: The lower end of the eccentric groove (41) is located at the lower end of the second crank arm (4) body.

5. A quick-oiling compressor crankshaft as set forth in claim 1 wherein: The eccentric groove (41) is located at the lower part of the outer end of the second crank arm (4) body.

6. A quick-oiling compressor crankshaft as set forth in claim 1 wherein: The width of the eccentric groove (41) gradually decreases in the direction approaching the shaft center of the power shaft (6).

7. A quick-oiling compressor crankshaft as defined in claim 6, wherein: The contraction angle of the eccentric groove (41) is not greater than 20°.

8. A quick-oiling compressor crankshaft as set forth in claim 1 wherein: The eccentric groove (41) is provided with a plurality of eccentric grooves (41) distributed around the shaft center of the power shaft (6).

9. A quick-oilable compressor crankshaft as set forth in claim 1 wherein: The lower part of the second crank arm (4) is in a half-circular pie structure.

10. A quick-oiling compressor crankshaft as set forth in claim 9 wherein: The first crank arm (2) and the second crank arm (4) are the same in structure.

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