Crankshaft without lubrication dead angle and compressor

Abstract

The utility model provides a crankshaft without lubrication dead angles, which comprises a long shaft, an eccentric shaft arranged at the upper end of the long shaft, an oil pumping hole arranged at the bottom end of the long shaft, an oil hole A arranged on the outer wall of the lower end of the long shaft and communicated with the oil pumping hole, a spiral oil groove A arranged on the outer wall of the long shaft, and an oil hole B arranged on the outer wall surface of the long shaft and positioned below the oil hole A, the oil hole B corresponds to the lower edge of the crankshaft hole of the cylinder seat and is communicated with the oil pumping hole; according to the utility model, the parts which cannot be lubricated by the cylinder seat and the long shaft of the crankshaft are fully lubricated, so that the parts are prevented from being abraded, and the reliability and the service life of the compressor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a crankshaft without a lubrication dead angle and a compressor. Background Art

[0002] The compressor is the main component of the refrigeration equipment. The mechanical structure of the existing piston compressor generally includes a cylinder seat, a crankshaft, a piston, a connecting rod, etc. The long axis of the crankshaft is inserted into the crankshaft hole of the cylinder seat. During operation, the long axis of the crankshaft rubs against the inner wall of the crankshaft hole of the cylinder seat, and the lubricating oil is mainly sucked in through the pump oil hole at the bottom of the long shaft and then enters the oil groove on the outer wall of the long shaft. Lubrication is performed through the lubricating oil between the oil groove and the crankshaft hole. In the existing compressor structure, Figure 5 As shown, there is a section M at the lower end of the long axis of the crankshaft. During operation, since it is located below the oil hole, most of the lubricating oil flows upward due to centrifugal force. Therefore, this section is short of oil. As the running time goes by, this section is prone to wear, and severe wear will cause jamming. Summary of the invention

[0003] The purpose of the utility model is to solve the technical problems existing in the above-mentioned existing crankshafts and compressors, and to provide a crankshaft and a compressor without lubrication dead angles.

[0004] The specific scheme of the utility model is: a crankshaft without lubrication dead angle, including a long shaft, an eccentric shaft is provided at the upper end of the long shaft, an oil pump hole is provided at the bottom end of the long shaft, an oil hole A connected with the oil pump hole is provided on the outer wall of the lower end of the long shaft, a spirally ascending oil groove A is provided on the outer wall of the long shaft, the bottom end of the oil groove A is connected with the oil hole A, an oil hole B is provided on the outer wall surface of the long shaft below the oil hole A, the oil hole B corresponds to the lower edge of the crankshaft hole of the cylinder seat, and the oil hole B is connected with the oil pump hole.

[0005] Furthermore, the outer wall of the long shaft is provided with a spirally ascending oil groove B, the bottom end of the oil groove B is connected to the oil hole B, and the top end of the oil groove B extends toward the oil hole A.

[0006] Furthermore, the outer end of the oil hole B is provided with a tapered hole that spreads outward, and a portion of the lower end of the tapered hole is exposed from the crankshaft hole.

[0007] Furthermore, the axis of the oil hole B is arranged along the radial direction of the long axis.

[0008] The utility model also provides a compressor, comprising a cylinder seat and a crankshaft, wherein the long axis of the crankshaft is inserted into the crankshaft hole of the cylinder seat, and the crankshaft adopts the above-mentioned crankshaft without lubrication dead angle.

[0009] Compared with the prior art, the utility model has the following advantages: by providing the oil hole B and the oil groove B, the lubricating oil sucked into the pump oil hole can cover the original lubrication dead angle, so that the parts that were previously not lubricated by the cylinder seat and the crankshaft long axis can be fully lubricated, thereby avoiding wear at these places and improving the reliability and service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the crankshaft of the utility model;

[0011] Figure 2 It is the front view of the crankshaft of the utility model;

[0012] Figure 3 It is a cross-sectional schematic diagram of the assembly state of the crankshaft and the cylinder seat of the utility model;

[0013] Figure 4 yes Figure 3 AA view;

[0014] Figure 5 It is a cross-sectional view of the assembly state of the cylinder block and the crankshaft in the prior art;

[0015] In the figure: 1. long shaft; 2. oil hole B; 3. oil groove B; 4. tapered hole; 5. oil groove A; 6. oil hole A; 7. cylinder seat. DETAILED DESCRIPTION

[0016] Example 1 See Figure 1-4 The present embodiment provides a crankshaft without lubrication dead angles, including a long shaft 1, an eccentric shaft is provided at the upper end of the long shaft 1, an oil pump hole is provided at the bottom end of the long shaft 1, an oil hole A6 connected to the oil pump hole is provided on the outer wall of the lower end of the long shaft 1, a spirally ascending oil groove A5 is provided on the outer wall of the long shaft 1, the bottom end of the oil groove A5 is connected to the oil hole A6, an oil hole B2 is provided on the outer wall surface of the long shaft 1 below the oil hole A6, the oil hole B2 corresponds to the lower edge of the crankshaft hole of the cylinder seat 7, and the oil hole B2 is connected to the oil pump hole.

[0017] Furthermore, a tapered hole 4 that spreads outward is provided at the outer end of the oil hole B2, and a portion of the lower end of the tapered hole 4 is exposed from the crankshaft hole.

[0018] Furthermore, the axis of the oil hole B2 is arranged along the radial direction of the long axis 1 .

[0019] The utility model also provides a compressor, comprising a cylinder seat 7 and a crankshaft, wherein the long axis 1 of the crankshaft is inserted into the crankshaft hole of the cylinder seat 7, and the crankshaft adopts the above-mentioned crankshaft without lubrication dead angle.

[0020] When the compressor of this embodiment is running, the lubricating oil enters from the pump oil hole at the bottom of the crankshaft, and most of the lubricating oil climbs along the inner wall to the oil hole A6 and reaches the oil groove A5 after passing through the oil hole A6, and then climbs upward along the oil groove A5. The area swept by the oil groove A5 is fully lubricated by the lubricating oil. A small part of the lubricating oil climbs to the oil hole B2, passes through the oil hole B2 and reaches the tapered hole 4. The area swept by the tapered hole 4 can cover the oil-deficient part, so this dead angle can also be fully lubricated. The lubricating oil continuously flows out from the oil hole B2, and is continuously discharged from the gap exposed at the lower end of the oil hole B2, which plays a lubricating role on the one hand, and plays a role in removing chips and impurities on the other hand.

[0021] Embodiment 2 The structure of this embodiment is basically the same as that of embodiment 1, except that the following features are added on the basis of embodiment 1: the outer wall of the long shaft 1 is provided with a spirally ascending oil groove B3, the bottom end of the oil groove B3 is connected to the oil hole B2, and the top end of the oil groove B3 extends to the oil hole A6. This embodiment adds the oil groove B3 on the basis of embodiment 1 to further improve the lubrication effect on the dead corner.

Claims

1. A crankshaft without a lubrication dead angle, comprising a long shaft, an eccentric shaft is provided at the upper end of the long shaft, an oil pump hole is provided at the bottom end of the long shaft, an oil hole A connected to the oil pump hole is provided on the outer wall of the lower end of the long shaft, and a spirally ascending oil groove A is provided on the outer wall of the long shaft, and the bottom end of the oil groove A is connected to the oil hole A, wherein: An oil hole B is provided on the outer wall surface of the long shaft below the oil hole A. The oil hole B corresponds to the lower edge of the crankshaft hole of the cylinder seat, and the oil hole B is connected to the pump oil hole.

2. A crankshaft without lubrication dead angle according to claim 1, characterized in that: The outer wall of the long shaft is provided with a spirally ascending oil groove B, the bottom end of the oil groove B is connected with the oil hole B, and the top end of the oil groove B extends toward the oil hole A.

3. The crankshaft without lubrication dead angle according to claim 1, characterized in that: The outer end of the oil hole B is provided with a tapered hole that spreads outward, and a portion of the lower end of the tapered hole is exposed from the crankshaft hole.

4. The crankshaft without lubrication dead angle according to claim 1, characterized in that: The axis of the oil hole B is arranged along the radial direction of the major axis.

5. A compressor, comprising a cylinder block and a crankshaft, wherein the long axis of the crankshaft is inserted into the crankshaft hole of the cylinder block, wherein: The crankshaft is the crankshaft according to any one of claims 1 to 4.

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