Butt joint structure of compressor crankshaft and coupler

Abstract

The butt joint structure comprises the crankshaft and the coupler, the coupler is movably arranged on the edge of the outer side of the crankshaft in a sleeved mode, an expansion sleeve is movably connected with an inner cavity of the coupler in an inserted mode, the expansion sleeve is movably arranged on the edge of the outer side of the crankshaft in a sleeved mode, and an annular expansion joint is formed in the right side of the expansion sleeve. According to the butt joint structure of the compressor crankshaft and the coupler, along with tightening of the screws, the distance between the connecting plate and the coupler becomes small, the connecting plate drives the connecting ring and the conical ring to move towards the left side, the conical ring moves in an inner cavity of the annular expansion joint, and therefore the expansion sleeve expands; according to the device, more labor is saved in installation, compared with an existing key groove type installation mode, the shaft body is not slotted, and the strength of the shaft body can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of compressor spare parts, especially to a butt joint structure of compressor crankshaft and shaft coupling. BACKGROUND

[0002] Reciprocating piston compressor is divided into two kinds of shaft drive and non shaft drive according to transmission mode, and the shaft drive reciprocating piston compressor is divided into two kinds of crankshaft drive and non crankshaft drive according to the structure of shaft, in the crankshaft drive, one kind is reciprocating piston compressor crankshaft without crosshead, and the other kind is reciprocating piston compressor with crosshead, the connecting rod drives the piston to reciprocate in the cylinder through the crosshead, and the compressor is provided with a crankshaft, the crankpin shaft of the crankshaft is composed of crankshaft neck, crankpin, crank and shaft body, and most of the present compressors adopt this structure.

[0003] The existing crankshaft is connected with the shaft coupling, and the key connection mode is usually adopted, but the key connection needs to open a key groove on the shaft body, needs to damage the structure of the shaft body, leads to that the strength of the shaft body is not high, and the connecting mode is relatively inconvenient. UTILITY MODEL CONTENTS

[0004] In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a butt joint structure of compressor crankshaft and shaft coupling.

[0005] One of the purposes of the utility model is realized by adopting the following technical scheme:

[0006] A butt joint structure of compressor crankshaft and shaft coupling, comprising a crankshaft and a shaft coupling, the shaft coupling is movably sleeved on the outer side edge of the crankshaft, an expansion sleeve is movably inserted into the inner cavity of the shaft coupling, the expansion sleeve is movably sleeved on the outer side edge of the crankshaft, an annular expansion joint is formed in the right side of the expansion sleeve, a tapered ring is movably inserted into the inner cavity of the annular expansion joint, a connecting ring is fixedly connected to the right side of the tapered ring, connecting plates are fixedly connected to the right side of the connecting ring close to the top and the bottom, perforations are formed in the connecting plates, two screw holes are formed in the right side of the shaft coupling, a screw is movably inserted into the inner cavity of the perforation, and the screw is inserted into the inner cavity of the adjacent screw hole.

[0007] Further, the screw and the screw hole are in threaded connection, and the screw and the screw hole are matched with each other.

[0008] Further, the annular expansion joint and the tapered ring are matched with each other, and the expansion sleeve is matched with the crankshaft and the shaft coupling respectively.

[0009] Further, the two connecting plates are symmetrically arranged above and below with the central axis of the connecting ring as the axis of symmetry.

[0010] Compared with the prior art, the utility model has the advantages of

[0011] The utility model discloses a butt joint structure of compressor crankshaft and shaft coupling, with the screwing of screw, the distance between connecting plate and shaft coupling becomes small, and connecting plate drives connecting ring and conical ring to move to left side, and conical ring moves in the inner chamber of annular expansion joint, so that the expansion of expansion sleeve takes place, until the inside of expansion sleeve and the outside of crankshaft are attached, and the outside of expansion sleeve and the inside of shaft coupling are attached, so that the connection of crankshaft and shaft coupling is completed, the device is more labor-saving to install, and the structure is not slotted to shaft body itself relative to the existing keyway type installation mode, and the strength of shaft body can be guaranteed.

[0012] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are taken, and the detailed description is as follows in cooperation with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the front view of the utility model;

[0014] Figure 2 It is the left view of the utility model;

[0015] Figure 3 It is the front view of the utility model;

[0016] Figure 4 It is the front view of the utility model Figure 2 It is the enlarged view of A in the utility model;

[0017] Figure 5 It is the left view of the utility model part shaft coupling;

[0018] Figure 6 It is the explosion view of the utility model Figure 5 ;

[0019] Figure 7 It is the front view of the utility model part connecting ring;

[0020] Figure 8 It is the front view of the utility model part expansion sleeve.

[0021] Marked number in drawing: 1, crankshaft;2, shaft coupling;3, expansion sleeve;4, connecting ring;5, conical ring;6, connecting plate;7, perforation;8, screw hole;9, screw;10, annular expansion joint. DETAILED DESCRIPTION

[0022] The utility model makes further description below combining with the drawings and specific implementation, it is to explain that, under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined to form new embodiment.

[0023] It is to be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. When an element is referred to as being "positioned on" another element, it can be directly positioned on the other element or intervening elements can also be present. The term "vertical", "horizontal", "left", "right" and similar terms are used for explanation purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] Please refer to Figures 1-8 The utility model provides a kind of technical scheme: a kind of butt joint structure of compressor crankshaft and coupling, including crankshaft 1 and coupling 2, coupling 2 is movably sleeved in the outside edge of crankshaft 1, the inner cavity of coupling 2 movably inserts expansion sleeve 3, expansion sleeve 3 movably sleeved in the outside edge of crankshaft 1, expansion sleeve 3 right side is provided with annular expansion joint 10, the inner cavity of annular expansion joint 10 movably inserts taper ring 5, annular expansion joint 10 and taper ring 5 are mutually matched, expansion sleeve 3 is mutually pasted with crankshaft 1 and coupling 2 respectively;

[0026] Taper ring 5 right side is fixedly connected with connecting ring 4, connecting ring 4 right side is fixedly connected with connecting plate 6 near top and bottom, two connecting plates 6 are symmetrically arranged up and down with the center axis of connecting ring 4 as symmetry axis, perforation 7 is formed in connecting plate 6, two screw holes 8 are formed in the right side of coupling 2, the inner cavity of perforation 7 movably inserts screw 9, screw 9 is inserted into the inner cavity of adjacent screw hole 8, screw 9 and screw hole 8 are threadedly connected, screw 9 and screw hole 8 are mutually matched.

[0027] Working principle: the utility model discloses a compressor crankshaft and the butt joint structure of coupling, in the use process, first, the connecting ring 4 and the tapered ring 5 are set in the outside edge of crankshaft 1, then the expansion sleeve 3 is set in the outside edge of crankshaft 1, finally, the coupling 2 is set in one end of crankshaft 1, then moves the expansion sleeve 3 horizontally, moves the expansion sleeve 3 to the inner chamber of coupling 2, and makes the right side of expansion sleeve 3 flush with the right side of coupling 2, then moves the connecting ring 4 and the tapered ring 5, the tapered ring 5 is inserted in the inner chamber of annular expansion joint 10, then the screw 9 is passed through the perforated hole 7 and is tightened in the inner chamber of screw hole 8, along with the tightening of screw 9, the distance between connecting plate 6 and coupling 2 becomes small, connecting plate 6 drives the connecting ring 4 and the tapered ring 5 to move to the left side, the tapered ring 5 moves in the inner chamber of annular expansion joint 10, so that expansion sleeve 3 expands, until the inside of expansion sleeve 3 and the outside of crankshaft 1 are attached, the outside of expansion sleeve 3 and the inside of coupling 2 are attached, to complete the connection of crankshaft 1 and coupling 2, the device is more labor-saving to install, and the structure is not slotted to the shaft body itself relative to the existing keyway type installation mode, so that the strength of the shaft body can be guaranteed.

[0028] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0029] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0030] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction of two elements, unless another definite limitation.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model in the specific situation.

[0031] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction of two elements, unless another definite limitation.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model in the specific situation.

[0032] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0033] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the skilled in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

Claims

1. A butt joint structure of a compressor crankshaft and a coupling, comprising a crankshaft (1) and a coupling (2), the coupling (2) being movably sleeved on the outer side edge of the crankshaft (1), characterized in that: The inner cavity of the coupling (2) is movably inserted with an expansion sleeve (3), the expansion sleeve (3) is movably sleeved on the outer side edge of the crankshaft (1), the right side of the expansion sleeve (3) is provided with an annular expansion joint (10), the inner cavity of the annular expansion joint (10) is movably inserted with a conical ring (5), the right side of the conical ring (5) is fixedly connected with a connecting ring (4), the right side of the connecting ring (4) is fixedly connected with a connecting plate (6) near the top and the bottom, the connecting plate (6) is provided with a perforation (7), the right side of the coupling (2) is provided with two screw holes (8), the inner cavity of the perforation (7) is movably inserted with a screw (9), and the screw (9) is inserted into the inner cavity of the adjacent screw hole (8).

2. A compressor crankshaft and coupling interface as set forth in claim 1, characterized in that: The screw (9) and the screw hole (8) are in threaded connection, and the screw (9) and the screw hole (8) are matched with each other.

3. The interface structure of a compressor crankshaft and a coupling according to claim 1, characterized in that: The annular expansion joint (10) and the conical ring (5) are matched with each other, and the expansion sleeve (3) is matched with the crankshaft (1) and the coupling (2) respectively.

4. The interface structure of a compressor crankshaft and a coupling according to claim 1, characterized in that: The two connecting plates (6) are symmetrically arranged up and down with the center axis of the connecting ring (4) as the axis of symmetry.

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