A compressor crankshaft

Abstract

The utility model discloses a compressor crankshaft, which belongs to the technical field of crankshafts and comprises a crankshaft body, wherein the crankshaft body comprises a first connecting shaft, a second connecting shaft and a third connecting shaft, wherein the first connecting shaft is connected to the left end of the second connecting shaft through a connecting block, and the third connecting shaft is connected to the right end of the second connecting shaft through a connecting block, the first connecting shaft and the second connecting shaft are coaxial, a distance between a central axis of the second connecting shaft and a central axis of the first connecting shaft is less than a sum of a radius of the central axis of the second connecting shaft and the first connecting shaft and is greater than zero, and the center of gravity of the crankshaft body is located on the central axis of the first connecting shaft. When rotating at no load, since the center of gravity of the crankshaft body is located on the central axis of the first connecting shaft, the overall operation is stable, which is convenient for early debugging and reduces interference, and a connecting rod can be subsequently installed on the second connecting shaft to be suitable for the compressor.

Description

Technical Field

[0001] The utility model belongs to the technical field of crankshafts, in particular to a compressor crankshaft. Background Art

[0002] The crankshaft is the most important part of the engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the combined effects of the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, which makes the crankshaft subject to bending and torsion loads. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the journal surface must be wear-resistant, work evenly and have good balance.

[0003] Crankshafts are also used in compressors. Regardless of the structure of the crankshaft, it needs to be debugged during installation to ensure stable no-load rotation. Due to the eccentric structure of the crankshaft, adjustment is difficult, and the special shape of the structure makes maintenance more difficult. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] The utility model provides a compressor crankshaft, comprising a crankshaft body, wherein the crankshaft body comprises a first connecting shaft, a second connecting shaft and a third connecting shaft, wherein the first connecting shaft is connected to the left end of the second connecting shaft via a connecting block, wherein the third connecting shaft is connected to the right end of the second connecting shaft via a connecting block, wherein the first connecting shaft and the second connecting shaft are coaxial, wherein a distance between a central axis of the second connecting shaft and a central axis of the first connecting shaft is less than a sum of a radius of the central axis of the second connecting shaft and the first connecting shaft and is greater than zero, and wherein the center of gravity of the crankshaft body is located on the central axis of the first connecting shaft.

[0007] Preferably, the first connecting shaft and the third connecting shaft are both provided with bearing steps, the connecting block is provided with a gap step that contacts the bearing step, and the bearing is mounted on the bearing step.

[0008] Preferably, the connecting block comprises a square portion and an arcuate portion, the arcuate portion is coaxial with the second connecting shaft, and a guide groove is provided on the square portion, the guide groove passes through the gap step and passes through the gap step to face the bearing opening.

[0009] Preferably, a limiting step is provided on one side of the square portion connecting block connected to the second connecting shaft.

[0010] Preferably, one end of the third connecting shaft away from the connecting plate is a mounting stub shaft end, a keyway is provided on the mounting stub shaft end, and an eccentric shaft sleeve is sleeved on the mounting stub shaft end. Beneficial Effects

[0011] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0012] The utility model provides a compressor crankshaft, when rotating without load, because the center of gravity of the crankshaft body is located on the central axis of the first connecting shaft, the overall operation is stable, which is convenient for early debugging and reduces interference. The connecting rod can be subsequently installed on the second connecting shaft and is suitable for the compressor.

[0013] The utility model is a compressor crankshaft. When in use, the lubricant is injected into the guide groove 144 through the equipment. The lubricant can flow into the bearing along the sixth stage for lubrication. It is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a compressor crankshaft of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of a compressor crankshaft of the utility model;

[0016] Figure 3 The utility model is a schematic structural diagram of a guide groove of a compressor crankshaft.

[0017] Explanation of the symbols in the schematic diagram:

[0018] 100, crankshaft body; 110, first connecting shaft; 111, bearing step; 112, bearing; 113, limit step; 120, second connecting shaft; 130, third connecting shaft; 131, installation short shaft end; 132, eccentric bushing; 140, connecting block; 141, gap step; 142, square part; 143, arc part; 144, guide groove. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0022] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0023] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Example

[0025] Refer to the attached Figure 1-3A compressor crankshaft of the present embodiment includes a crankshaft body 100, the crankshaft body 100 includes a first connecting shaft 110, a second connecting shaft 120 and a third connecting shaft 130, the first connecting shaft 110 is connected to the left end of the second connecting shaft 120 through a connecting block 140, the third connecting shaft 130 is connected to the right end of the second connecting shaft 120 through a connecting block 140, the first connecting shaft 110 and the second connecting shaft 120 are coaxial, the distance between the central axis of the second connecting shaft 120 and the central axis of the first connecting shaft 110 is less than the sum of the radii of the central axis of the second connecting shaft 120 and the first connecting shaft 110 and is greater than At zero, the center of gravity of the crankshaft body 100 is located on the central axis of the first connecting shaft 110. With this design structure, when rotating at no-load, since the center of gravity of the crankshaft body 100 is located on the central axis of the first connecting shaft 110, the overall operation is stable, which is convenient for early debugging and reduces interference. The connecting rod can be installed on the second connecting shaft 120 later and it can be applied to the compressor. It should be noted that the center of gravity of the crankshaft body 100 located on the central axis of the first connecting shaft 110 is a theoretical concept. In actual processing, whether it is the detection accuracy of the measuring instrument or the actual processing difficulty, there will be a little deviation, which will not affect the overall situation.

[0026] In this embodiment, the first connecting shaft 110 and the third connecting shaft 130 are both provided with a bearing 112 step 111, and the connecting block 140 is provided with a gap step 141 that is in contact with the bearing 112 step 111, and the bearing 112 is installed on the bearing 112 step 111. This design structure is provided with a separate bearing 112 step 111 for installing the bearing 112.

[0027] The connecting block 140 of the present embodiment includes a square portion 142 and an arc portion 143. The arc portion 143 is coaxial with the second connecting shaft 120. A guide groove 144 is provided on the square portion 142. The guide groove 144 passes through the gap step 141 and passes through the gap step 141 to face the opening of the bearing 112, and is used to guide the lubricating liquid. When in use, the lubricant is injected into the guide groove 144 through the equipment, and the lubricant can flow into the bearing 112 along the sixth stage for lubrication. It should be noted that lubrication is not performed in the working state, but in the shutdown state. At the same time, the guide groove 144 does not contact the bearing 112, and the liquid has a certain tension. When the guide groove 144 is close enough to the bearing 112, the lubricant will enter the bearing 112 due to the tension, as shown in the accompanying drawings.

[0028] In this embodiment, a limiting step 113 is provided on one side of the square portion 142 where the connecting block 140 is connected to the second connecting shaft 120 .

[0029] The end of the third connecting shaft 130 of this embodiment away from the connecting plate is an installation short shaft end 131, and a keyway is provided on the installation short shaft end 131. An eccentric shaft sleeve 132 is sleeved on the installation short shaft end 131. The eccentric state is changed by the eccentric shaft sleeve 132, that is, the overall center of gravity is changed by weight distribution, so that it is close to the central axis of the first connecting shaft 110.

[0030] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A compressor crankshaft, characterized in that: The crankshaft body (100) includes a first connecting shaft (110), a second connecting shaft (120) and a third connecting shaft (130), wherein the first connecting shaft (110) is connected to the left end of the second connecting shaft (120) via a connecting block (140), and the third connecting shaft (130) is connected to the right end of the second connecting shaft (120) via a connecting block (140), the first connecting shaft (110) and the second connecting shaft (120) are coaxial, the distance between the central axis of the second connecting shaft (120) and the central axis of the first connecting shaft (110) is less than the sum of the radii of the central axis of the second connecting shaft (120) and the first connecting shaft (110) and is greater than zero, and the center of gravity of the crankshaft body (100) is located on the central axis of the first connecting shaft (110).

2. A compressor crankshaft according to claim 1, characterized in that: The first connecting shaft (110) and the third connecting shaft (130) are both provided with a bearing (112) step (111), the connecting block (140) is provided with a gap step (141) intended to contact the bearing (112) step (111), and the bearing (112) is mounted on the bearing (112) step (111).

3. A compressor crankshaft according to claim 2, characterized in that: The connecting block (140) comprises a square portion (142) and an arc portion (143), wherein the arc portion (143) is coaxial with the second connecting shaft (120), and a guide groove (144) is provided on the square portion (142), wherein the guide groove (144) passes through the gap step (141) and penetrates the gap step (141) to face the opening of the bearing (112).

4. A compressor crankshaft according to claim 3, characterized in that: A limiting step (113) is provided on one side of the square portion (142) connecting the connecting block (140) to the second connecting shaft (120).

5. A compressor crankshaft according to claim 1, characterized in that: One end of the third connecting shaft (130) away from the connecting plate is a mounting short shaft end (131), a keyway is provided on the mounting short shaft end (131), and an eccentric shaft sleeve (132) is sleeved on the mounting short shaft end (131).

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