Air compressor fan coupler

Abstract

The utility model relates to the field of air compressor couplings, in particular to an air compressor fan coupler which comprises a fan shaft, a crank I, an eccentric shaft and a crank II, the crank I comprises a handle body, a fan shaft connecting end and an eccentric shaft inserting end, and the eccentric shaft inserting end comprises an open groove matched with the eccentric shaft in an inserting mode. The fan shaft connecting end comprises a fan shaft sleeve, and a fixed connecting part is arranged between the fan shaft and the fan shaft sleeve. The fixed connecting part comprises a plurality of positioning holes I formed in the axial direction of the fan shaft, a positioning hole II formed in the front end of the fan shaft sleeve, and a positioning pin for connecting the positioning holes I and the positioning hole II. The fixed connecting part comprises an external thread arranged on the fan shaft, an internal thread arranged on the fan shaft sleeve and a plurality of cushion blocks with different heights, wherein the diameter of the cushion blocks is the same as that of the fan shaft sleeve. The piston rod has the advantages of being easy to assemble and reducing machining difficulty on the whole, and is convenient to replace when being matched with piston rods of different sizes; and the problem of axial movement is avoided.

Description

Technical Field

[0001] This utility model relates to the field of air compressor couplings, specifically an air compressor fan coupling. Background Technology

[0002] The fan coupling structure of an air compressor includes a fan shaft, crank I, an eccentric shaft, and crank II. The end of the fan shaft is inserted into a positioning hole on crank I. The two ends of the eccentric shaft are connected to crank I and crank II respectively. The eccentric shaft is connected to the external drive piston rod through bearings. The connection between the shaft and the crank is usually an interference fit or integral molding. For example, the air compressor and vehicle disclosed in Chinese utility model patent CN217233727 U have a crankshaft including an output shaft, a drive unit, an eccentric shaft, and a crank connecting the output shaft and the eccentric shaft. This structure, as a conventional method for existing air compressor fan couplings, has the following problems in use: 1. The eccentric shaft is used to connect to the external drive piston rod. The fixed length of the eccentric shaft cannot accommodate piston rods of different sizes. When a larger piston rod needs to be replaced, the disassembly and assembly of the entire coupling is relatively troublesome. 2. Disassembly and assembly are troublesome when the fan or fan shaft needs to be replaced. 3. The assembly process of the crank with the output shaft and eccentric shaft is complex and difficult. 4. After prolonged use, the shafts of the coupling may experience axial movement. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides an air compressor fan coupling that has a simple assembly process, prevents axial movement, and has good expandability.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An air compressor fan coupling includes a fan shaft, crank I, an eccentric shaft, and crank II. Crank I includes a handle body, a fan shaft connecting end, and an eccentric shaft insertion end. The eccentric shaft insertion end includes an open groove that engages with the eccentric shaft.

[0006] Furthermore, the fan shaft connecting end includes a fan shaft sleeve, and a fixed connection part is provided between the fan shaft and the fan shaft sleeve; the fixed connection part can fix the fan shaft at different positions inside the fan shaft sleeve.

[0007] Furthermore, the fixed connection part includes a plurality of positioning holes I provided in the axial direction of the fan shaft, a positioning hole II provided at the front end of the fan shaft sleeve, and a positioning pin connecting the positioning holes I and the positioning holes II.

[0008] Furthermore, the fixed connection includes an external thread on the fan shaft, an internal thread on the fan shaft sleeve, and several pads of different heights that have the same diameter as the fan shaft sleeve.

[0009] Furthermore, the front end of the eccentric shaft is provided with a detachable connector, which mates with the opening groove.

[0010] Furthermore, a connecting shaft is provided at the rear end of the connector, and a blind hole corresponding to the connecting shaft is provided at the center of the eccentric shaft.

[0011] Furthermore, the connecting shaft is provided with a raised key, and the blind hole is provided with a corresponding keyway.

[0012] Furthermore, the front end of the connector is provided with an annular groove corresponding to the opening groove.

[0013] The beneficial effects of this utility model are:

[0014] This invention offers advantages such as ease of assembly, reduced processing difficulty, and convenient replacement when adapting to piston rods of different sizes; it also eliminates the problem of axial movement. Specifically, by designing an eccentric shaft connector, the processing and assembly difficulty of the connection between the eccentric shaft and crankshaft is reduced. The mating connection between the fan shaft and fan shaft sleeve is easy to process and disassemble / install. The detachable connector at the front end of the eccentric shaft allows for replacement of the connector and crankshaft without replacing the eccentric shaft, saving costs and facilitating overall disassembly. The annular groove at the front end of the connector, corresponding to the opening groove, and the connection between the fan shaft and fan shaft sleeve effectively prevent axial movement. Attached Figure Description

[0015] Figure 1 This is an exploded view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the second embodiment of the fixed connection part of this utility model;

[0017] Figure 3 This is a schematic diagram of the connector structure of this utility model;

[0018] Figure 4 This is a side view of the assembled structure of this utility model;

[0019] In the figure, there are: fan shaft 1, crank connecting end 101, positioning hole I 1011, fan assembly end 102, main bearing assembly end 103, bearing retaining ring 104, crank I 2, crank body 201, opening groove 202, fan shaft sleeve 203, positioning hole II 2031, eccentric shaft 3, plug connector 301, connecting shaft 302, key 303, connecting plate 304, annular groove 305, crank II 4, pad block 5, fan 6, crank connecting end 101a, external thread 1011a, and fan shaft sleeve 203a. Detailed Implementation

[0020] To better understand this utility model, the following will be combined with Figures 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1:

[0022] The air compressor fan coupling in this embodiment includes a fan shaft 1, a crank I 2, an eccentric shaft 3, and a crank II 4. The crank I 2 includes a crank body 201, a fan shaft connecting end, and an eccentric shaft insertion end. The eccentric shaft insertion end includes an open slot 202 that engages with the eccentric shaft 3, and the eccentric shaft 3 has a slot corresponding to the open slot 202. The open slot 202 design simplifies assembly and reduces the weight of the rotating system. The fan shaft connecting end includes a fan shaft sleeve 203, and a fixed connection is provided between the fan shaft 1 and the fan shaft sleeve 203. The crank II 4 adopts an existing structure, and its connection to the eccentric shaft 3 can be achieved by insertion followed by fixing with a pin or screw, allowing for an integral molding design.

[0023] The fixed connection part can fix the crank connection end 101 of the fan shaft 1 at different positions within the fan shaft sleeve 203. The purpose of this structure is that when a larger piston rod needs to be replaced, the length of the eccentric shaft 3 increases; in this case, only the distance between the fan shaft 1 and the fan shaft sleeve 203 needs to be shortened. The specific implementation method is as follows: Option 1, such as... Figure 1 As shown, the fixed connection includes a plurality of positioning holes I 1011 provided axially on the crank connection end 101, a positioning hole II 2031 provided at the front end of the fan shaft sleeve 203, and a positioning pin connecting the positioning holes I 1011 and the positioning holes II 2031. Figure 1 As shown, the positioning holes I1011 are arranged in a circumferentially spaced manner with four positioning holes I1011 and three sets of positioning holes I1011 are arranged radially. The front end of the fan shaft sleeve 203 has four positioning holes II2031 arranged circumferentially with equal spacing. In use, after adjusting the fan shaft 1 and fan shaft sleeve 203 to appropriate positions, positioning holes I1011 and positioning holes II2031 are fixedly connected using positioning pins. Alternatively, positioning holes I1011 can be threaded holes, and positioning pins can be screws.

[0024] Option 2, such as Figure 2As shown, the fixed connection includes an external thread 1011a on the crank connecting end 101a, an internal thread on the fan shaft sleeve 203a, and several pads 5 of different heights with the same diameter as the fan shaft sleeve 203a. In use, pads 5 of the appropriate height are placed inside the fan shaft sleeve 203a, and then the crank connecting end 101a is connected to the fan shaft sleeve 203a by screwing it to the bottom. It should be noted that the thread tightening direction of the crank connecting end 101a and the fan shaft sleeve 203a is the same as the rotation direction of the crank connecting end 101a; therefore, the threaded connection is stable and will not loosen with the rotation of the crank connecting end 101a.

[0025] Example 2:

[0026] Based on the above embodiment one, this embodiment designs a detachable connector, as follows: Figure 1 and Figure 3 As shown, the front end of the eccentric shaft 3 is provided with a detachable connector 301, which mates with the opening slot. The detachable connection is as follows: a connecting plate 304 is provided at the end of the connector 301, and the connecting plate 304 is fixedly connected to the eccentric shaft 3 by screws. Furthermore, a connecting shaft 302 is provided at the rear end of the connector 301, and a blind hole corresponding to the connecting shaft 302 is provided at the center of the eccentric shaft 3. To ensure a more stable connection structure during rotation, a raised key 303 is provided on the connecting shaft 302, and a corresponding keyway is provided in the blind hole. The slot provided on the eccentric shaft 3 is an annular groove 305 corresponding to the opening slot 202 at the front end of the connector 301.

[0027] For any technology not mentioned in this utility model, existing technology is adopted. For example, the front end of the fan shaft 1 is the fan assembly end 102, the flat key is used to fix the fan, the rear of the fan assembly end 102 is the main bearing assembly end 103, and the rear of the main bearing assembly end 103 is the bearing retaining ring 104. The connection method and sealing method between the fan shaft 1 and the fan 6 are also existing technologies.

[0028] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air compressor fan coupling, comprising a fan shaft, crank I, an eccentric shaft, and crank II, characterized in that: The crank I includes a crank body, a fan shaft connecting end, and an eccentric shaft insertion end, wherein the eccentric shaft insertion end includes an open groove that engages with the eccentric shaft.

2. The air compressor fan coupling as described in claim 1, characterized in that: The fan shaft connection end includes a fan shaft sleeve, and a fixed connection part is provided between the fan shaft and the fan shaft sleeve; the fixed connection part can fix the fan shaft at different positions inside the fan shaft sleeve.

3. The air compressor fan coupling as described in claim 2, characterized in that: The fixed connection part includes a plurality of positioning holes I provided in the axial direction of the fan shaft, a positioning hole II provided at the front end of the fan shaft sleeve, and a positioning pin connecting the positioning holes I and the positioning holes II.

4. The air compressor fan coupling as described in claim 2, characterized in that: The fixed connection includes an external thread on the fan shaft, an internal thread on the fan shaft sleeve, and several pads of different heights with the same diameter as the fan shaft sleeve.

5. The air compressor fan coupling as described in claim 1, characterized in that: The front end of the eccentric shaft is provided with a detachable connector, which mates with the opening slot.

6. The air compressor fan coupling as described in claim 5, characterized in that: The connector has a connecting shaft at its rear end, and the eccentric shaft has a blind hole at its center corresponding to the connecting shaft.

7. The air compressor fan coupling as described in claim 6, characterized in that: The connecting shaft is provided with a raised key, and the blind hole is provided with a corresponding keyway.

8. An air compressor fan coupling as described in any one of claims 5-7, characterized in that: The front end of the connector is provided with an annular groove corresponding to the opening groove.

Images