CN221096765U - Driving device of air compressor and air compressor - Google Patents

Abstract

The embodiment of the utility model relates to air compression equipment, in particular to a driving device of an air compressor and the air compressor, wherein the driving device comprises: the device comprises a crankshaft assembly, a plurality of cam assemblies, a plurality of connecting rods and a driving assembly; the crankshaft assembly is rotatable by taking a preset axis as a pivot axis, each cam assembly is sleeved on the crankshaft assembly along the direction of the preset axis, and each cam assembly performs circular motion around the direction of the preset axis when the crankshaft assembly rotates; the connecting rods are the same as the cam assemblies in number and are uniquely corresponding to the cam assemblies, are sleeved on the uniquely corresponding cam assemblies, and are respectively rotatable relative to the uniquely corresponding cam assemblies; the driving assembly is connected with the crankshaft assembly and is used for driving the crankshaft assembly to rotate by taking the preset axis as a pivot axis. Compared with the prior art, the air compressor has smaller volume, and simultaneously, the air compressor also has better balance and stability, so unnecessary vibration of the air compressor during working is eliminated.

Description

Driving device of air compressor and air compressor

Technical Field

The embodiment of the utility model relates to air compression equipment, in particular to a driving device of an air compressor and the air compressor.

Background

In a conventional internal combustion engine, reciprocating motion of a piston is converted into rotational motion of a crankshaft by a crank cam mechanism, and corresponding moving parts are driven by the crankshaft to output power to the outside. In the conventional air compressor, the rotary motion of the crankshaft is converted into the reciprocating linear motion of the piston by the crank cam mechanism, and the air in the cylinder is compressed by the piston. However, in the crank cam mechanism, if the compression of multiple cylinders is to be realized, the power of the air compressor is improved, and a plurality of crank shaft assemblies are required to be arranged, so that the volume of the air compressor can be definitely increased, the air compressor is heavy, the original balance of the air compressor can be damaged, and unnecessary vibration is caused.

Disclosure of utility model

The embodiment of the utility model aims to design a driving device of an air compressor and the air compressor, which not only can increase the number of air cylinders of the air compressor and improve the power of the air compressor, but also can ensure that the air compressor has smaller volume and has better balance during working.

In order to achieve the above object, an embodiment of the present utility model provides a driving apparatus of an air compressor, the driving apparatus including:

The crankshaft assembly is rotatable by taking a preset axis as a pivot axis;

the cam assemblies are sleeved on the crankshaft assembly along the direction of the preset axis, and each cam assembly is used for performing circular motion around the direction of the preset axis when the crankshaft assembly rotates;

A plurality of connecting rods; the number of the connecting rods is the same as that of the cam assemblies, and the connecting rods are uniquely corresponding to the cam assemblies; each connecting rod is sleeved on the corresponding cam assembly and can rotate relative to the corresponding cam assembly; one end of each connecting rod along the length direction is connected with one cylinder of the air compressor, and the other end of each connecting rod is connected with the other cylinder of the air compressor;

The driving assembly is connected with the crankshaft assembly and used for driving the crankshaft assembly to rotate by taking the preset axis as a pivot axis;

And any cam component is used for respectively driving the only corresponding connecting rod to perform reciprocating linear motion along the length direction of the connecting rod when performing circular motion around the direction of the preset axis, so that each cylinder performs air suction and pumping.

Compared with the prior art, the embodiment of the utility model is characterized in that the driving device comprises: the crankshaft assembly, the cam assemblies, the connecting rods and the driving assemblies can be driven by the driving assemblies to rotate by taking the preset axis as the pivot axis, meanwhile, the cam assemblies and the connecting rods are the same in number and only correspond to each other, and the cam assemblies are sleeved on the crankshaft assemblies along the direction of the preset axis, so that each cam assembly can perform circular motion around the direction of the preset axis when the crankshaft assemblies rotate, and each cam assembly can drive the corresponding connecting rod to perform reciprocating linear motion along the length direction of the connecting rod, so that the driving of each connecting rod to the piston of each cylinder is realized, and the suction and pumping of each cylinder to air are realized. Therefore, the air compressor can only increase the number of the air cylinders and the power of the air compressor, and meanwhile, the number of the crankshaft assemblies is not increased, so that the air compressor has smaller volume, and secondly, the air compressor has better balance and stability because only one crankshaft assembly is running, and therefore unnecessary vibration of the air compressor in working is eliminated.

Drawings

Fig. 1 is a schematic axial view of an air compressor in accordance with some embodiments of the present utility model;

FIG. 2 is an isometric view of a crankcase of an air compressor in accordance with certain embodiments of the utility model;

FIG. 3 is a schematic view of an assembly of a crankcase, a crankshaft assembly, a cam assembly, and a fan assembly of an air compressor in accordance with certain embodiments of the utility model;

FIG. 4 is a schematic isometric view of a connecting rod and crankshaft assembly in accordance with certain embodiments of the present utility model;

FIG. 5 is a schematic cross-sectional view of a connecting rod and crankshaft assembly in accordance with some embodiments of the present utility model;

FIG. 6 is a cross-sectional view at B-B in FIG. 5;

Fig. 7 is an assembly schematic diagram of an air compressor in some embodiments of the present utility model;

FIG. 8 is a schematic view of a structure of a connecting rod according to some embodiments of the present utility model;

FIG. 9 is a schematic isometric view of a crankshaft assembly, cam assemblies, first positioning assembly, and second positioning assembly in accordance with certain embodiments of the present utility model;

FIG. 10 is a schematic cross-sectional view of a crankshaft assembly, cam assemblies, first positioning assembly, and second positioning assembly in accordance with some embodiments of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present utility model. The claimed utility model may be practiced without these specific details and with various changes and modifications based on the following embodiments.

Example 1

A first embodiment of the present utility model relates to a driving apparatus of an air compressor, as shown in fig. 1 to 10, including: a crankshaft assembly 1, a plurality of cam assemblies 2, a plurality of connecting rods 3 and a driving assembly 4.

As shown in fig. 3 and fig. 6, the crankshaft assembly 1 is rotatable with a preset axis as a pivot axis, each cam assembly 2 is sleeved on the crankshaft assembly 1 along the direction of the preset axis, and each cam assembly 2 performs circular motion around the direction of the preset axis when the crankshaft assembly 1 rotates.

Next, in some embodiments, as shown in fig. 4, 6 and 8, the number of the connecting rods 3 is the same as the number of the cam assemblies 2, and the connecting rods 3 are uniquely corresponding to each other, and each connecting rod 3 is sleeved on the uniquely corresponding cam assembly 2 and is relatively rotatable with the uniquely corresponding cam assembly 2. As shown in fig. 1 and 7, one end of each connecting rod 3 in the length direction is connected to one cylinder 10 of the air compressor, and the other end is connected to the other cylinder 10 of the air compressor.

Finally, in some embodiments, as shown in fig. 1, 2 and 3, a drive assembly 4 is connected to the crankshaft assembly 1, the drive assembly 4 being configured to drive the crankshaft assembly 1 to rotate about a predetermined axis as a pivot axis.

In addition, it should be noted that, as shown in fig. 5, any cam assembly 2 is configured to drive the corresponding connecting rod 3 to reciprocate in a linear manner along the length direction of the connecting rod 3 when performing a circular motion around the preset axis, so that each cylinder 10 can perform air suction and air pumping.

As can be seen from the above, since the driving device includes: the crankshaft assembly 1, the cam assemblies 2, the connecting rods 3 and the driving assembly 4 can drive the crankshaft assembly 1 to rotate by taking the preset axis as the pivot axis through the driving assembly 4, meanwhile, as the cam assemblies 2 and the connecting rods 3 are the same in number and only correspond to each other, and the cam assemblies 2 are sleeved on the crankshaft assembly 1 along the direction of the preset axis, each cam assembly 2 can perform circular motion around the direction of the preset axis when the crankshaft assembly 1 rotates, so that each cam assembly 2 can drive the corresponding connecting rod 3 to perform reciprocating linear motion along the length direction of the connecting rod 3, the driving of each connecting rod 3 to the piston of each cylinder 10 is realized, and finally the cylinders 10 perform suction and pumping of air. Therefore, the air compressor can only increase the number of the air cylinders 10 and the power of the air compressor, and meanwhile, the number of the crankshaft assemblies 1 cannot be increased, so that the air compressor has smaller volume, and secondly, the air compressor has better balance and stability because only one crankshaft assembly 1 is running, and therefore unnecessary vibration of the air compressor in working is eliminated.

Specifically, in some embodiments, as shown in fig. 7, 9 and 10, the crankshaft assembly 1 includes: a crankshaft 11, an output shaft 12, an input shaft 13, and a crank 14. As shown in fig. 10, the crankshaft 11 has a tail end 111 and a head end 112 far from the tail end 111 along the axial direction, wherein the output shaft 12 is connected with the tail end 111 of the crankshaft 11 and is eccentrically arranged with the crankshaft 11, the input shaft 13 is connected with the head end 112 of the crankshaft 11 and is eccentrically arranged with the crankshaft 11, and finally, the crank 14 is sleeved on the crankshaft 11 and is coaxially connected with the crankshaft 11. Therefore, in practical application, as shown in fig. 3, the input shaft 13 may be connected to the driving assembly 4 of the air compressor, so that the crankshaft assembly 1 may rotate with a preset axis as a pivot axis under the driving of the driving assembly 4.

Furthermore, in some embodiments, as shown in fig. 6, the cam assemblies 2 each include: eccentric 21 and bearing 22. As shown in fig. 9 and 10, each eccentric wheel 21 is sleeved on the crank 14 and is eccentrically disposed with respect to the crank 14, so that when the crankshaft assembly 1 rotates about the predetermined axis, each eccentric wheel 21 can perform a circular motion about the predetermined axis. Next, as shown in fig. 6, the bearing 22 of each cam module 2 is sleeved on the eccentric wheel 21 and coaxially disposed with the eccentric wheel 21, and, simultaneously, as shown in fig. 5 and 6, the bearing 22 includes: the cam assembly 2 can only generate radial acting force on the connecting rod 3 and cannot generate rotating acting force on the connecting rod 3 when rotating by means of the relative rotation characteristic of the bearing outer ring piece 222 and the bearing inner ring piece 221 of the bearing 22 when the eccentric wheels 21 rotate around the preset axis, so that the connecting rod 3 can only do linear motion along the length direction of the connecting rod 3 and cannot generate swinging, and the piston 101 has better acting efficiency in the cylinder body 102 of the cylinder 10, thereby further improving the power of the air compressor.

In addition, as a preferred embodiment, the deflection angle between every two adjacent cam assemblies 2 is the same, in some embodiments, the number of cam assemblies 2 is greater than two, for example, as shown in fig. 6, 9 and 10, the cam assemblies 2 may be provided with three, so that the deflection angle between every two adjacent cam assemblies 2 is 120 degrees, and the cylinders 10 of the air compressor may be provided with six in total, and six cylinders 10 may be disposed around the axis direction of the output shaft 12 or the input shaft 13, and every two adjacent cylinders 10 have a deflection angle of 60 degrees around the axis direction of the output shaft 12 or the input shaft 13, so that when the cylinders 10 are disposed, two by two, one set of the cylinders 10 may be disposed on the same movement path of the eccentric wheel 21, so that when the crankshaft assembly 1 rotates about the preset axis as the pivot axis, any one eccentric wheel 21 may change the rotational movement of the crank 14 into the reciprocating linear movement of the pistons 101 of the two cylinders 10 of the set, thereby achieving the suction and compression of air. In addition, it should be noted that in the present embodiment, the eccentric wheels 21 are only illustrated by three examples, and in other examples, the number of the eccentric wheels 21 may be increased according to the usage situation, and after each eccentric wheel 21 is added, the number of the cylinders 10 may be correspondingly increased, so that the air compressor may have a larger air intake amount while the volume of the air compressor is not changed.

In addition, in order to be able to position each cam module 2 on the crank 14, as shown in fig. 9 and 10, the crankshaft module 1 further comprises: the positioning rings 15 are sleeved on the crank 14 respectively, and as shown in fig. 6 and 10, the number of the positioning rings 15 is larger than that of the cam assemblies 2, one cam assembly 2 is arranged between every two adjacent positioning rings 15, and one cam assembly 2 can be positioned on the crank 14 through every two adjacent positioning rings 15.

Furthermore, as a preferred embodiment, as shown in fig. 9 and 10, the driving device further includes: a first positioning assembly 5 and a second positioning assembly 6. The first positioning component 5 and the second positioning component 6 are detachably disposed at both ends of the crank 14 along the axial direction of the crank 14, the first positioning component 5 is abutted against a positioning ring 15 disposed near one end of the crank 14, and the second positioning component 6 is abutted against a positioning ring 15 disposed near the other end of the crank 14.

Specifically, as shown in conjunction with fig. 9 and 10, the first positioning assembly 5 includes: the first bearing member 51 is sleeved at one end of the crank 14, the first bearing member 51 is abutted against the positioning ring 15 arranged near one end of the crank 14, the first bracket 52 is sleeved at the first bearing member 51, the first bracket 52 is used for supporting and fixing the first bearing member 51, and the first bearing member 51 is used for enabling the first bracket 52 and the crank 14 to rotate relative to each other. Also, in order to make the first bracket 52 and the crank 14 rotatable relative to each other by the first bearing member 51, as shown in fig. 10, the first bearing member 51 includes: the first inner ring member 511 sleeved on the crank 14, the first outer ring member 512 coaxial with and opposite to the first inner ring member 511, and a plurality of first rolling bodies 513 distributed between the first inner ring member 511 and the first outer ring member 512, and then the first bracket 52 is sleeved on the first outer ring member 512 of the first bearing member 51, the first bearing member 51 can be supported and fixed by the first bracket 52, and the first inner ring member 511 is abutted against the positioning ring 15 near one end of the crank 14.

Also, in some embodiments, as shown in fig. 9 and 10, the second positioning assembly 6 and the first positioning assembly 5 may have the same structure, and specifically, the second positioning assembly 6 includes: a second bearing member 61 and a second bracket 62, wherein the second bearing member 61 is sleeved on the other end of the crank 14, the second bearing member 61 is abutted with the positioning ring 15 arranged near the other end of the crank 14, and the second bracket 62 is sleeved on the second bearing member 61, the second bracket 62 is used for supporting and fixing the second bearing member 61, and the second bearing member 61 is used for being rotatable relative to each other between the second bracket 62 and the crank 14. Also, in order to make the second bracket 62 and the crank 14 rotatable relative to each other by the second bearing member 61, as shown in fig. 10, the second bearing member 61 includes: the second support 62 is sleeved on the second inner ring member 611 of the crank 14, the second outer ring member 612 coaxial with and opposite to the second inner ring member 611, and a plurality of second rolling bodies 613 distributed between the second inner ring member 611 and the second outer ring member 612, and secondly, the second support 62 is sleeved on the second outer ring member 612 of the second bearing member 61, and can be used for supporting and fixing the second bearing member 61 through the second support 62, and the second inner ring member 611 abuts against the positioning ring 15 near the other end of the crank 14. It is thus readily apparent that the stability of the crank 14 during rotation is ensured by the respective support of the first and second brackets 52, 62, avoiding unnecessary vibrations of the air compressor during operation.

In addition, to effect connection of the links 3 to the cam assembly 2, in some embodiments, as shown in fig. 4, 5 and 8, each link 3 includes: the annular clamping piece 31, the first rod piece 32 and the second rod piece 33. Wherein, as shown in fig. 5, the annular clamping member 31 is sleeved on the cam assembly 2 along the direction of the preset axis, meanwhile, as shown in fig. 8, the first rod member 32 and the second rod member 33 are connected with the annular clamping member 31, and the first rod member 32 and the second rod member 33 are opposite to each other along the length direction of the connecting rod 3. Next, in any one of the connecting rods 3, as shown in fig. 7, the first rod 32 is used to connect the piston 101 of one of the cylinders 10 of the air compressor, and the second rod 33 is used to connect the piston 101 of the other cylinder 10 of the air compressor.

In addition, in order to realize the sleeving of the annular clamping member 31 on the cam assembly 2, the annular clamping member 31 may adopt the following structure to realize the sleeving of the cam assembly 2, for example, as shown in fig. 5 and 8, the direction of the annular clamping member 31 around the preset axis includes: the first semi-ring 311 and the second semi-ring 312 detachably connected with the first semi-ring 311. The first half ring 311 is connected to the first rod 32, and the first half ring 311 and the second half ring 312 together enclose a space that can be sleeved with the bearing 22 of the cam assembly 2, and meanwhile, the second half ring 312 is also connected to the second rod 33. In addition, in order to realize the detachable connection between the first half ring 311 and the second half ring 312, in some embodiments, as shown in fig. 5 and 8, a portion of the outer surface of the first half ring 311 protrudes outwards to form a first threaded sleeve 313 that can be screwed in by a bolt 315, and a portion of the outer surface of the second half ring 312 protrudes outwards to form a second threaded sleeve 314 that can be screwed in by the bolt 315, so, in combination with fig. 5, the tail end and the head end of the first half ring 311 can be spliced with the tail end and the head end of the second half ring 312, and when the first half ring 311 and the second half ring 312 are spliced, the first threaded sleeve 313 and the second threaded sleeve 314 can be mutually communicated, in combination with fig. 5, the bolt 315 can be screwed into the first threaded sleeve 313 and the second threaded sleeve 314 in sequence, thereby completing the connection between the first half ring 311 and the second half ring 312, and in combination with the annular clamping member 31, in combination with the annular clamping member 31 can be screwed with the first half ring 31 and the second half ring 31, as shown in fig. 5, and then the first half ring member 31 can be screwed with the second half ring member 31 and the second half ring member 31, and then the first half ring member can be radially screwed with the second half ring member 313 and the second half ring member, and the second half ring member can be radially screwed with the first half ring member and the second half ring member, and the second half ring member can be radially screwed into the first ring member. In addition, as a preferred embodiment, in some examples, the first thread bush 313 and the second thread bush 314 may be provided with a plurality of first thread bushes, for example, as shown in fig. 5 and 8, the first thread bush 313 and the second thread bush 314 may be provided with two first thread bushes 313 respectively, and the two first thread bushes 313 are respectively arranged opposite to each other along the radial direction of the first half ring 311, and similarly, the two second thread bushes 314 are respectively arranged opposite to each other along the radial direction of the second half ring 312, so that the locking force of the first half ring 311 and the second half ring 312 after connection can be improved by the cooperation of the plurality of first thread bushes 313 and the plurality of second thread bushes 314, so that the annular clamping member 31 and the cam assembly 2 can be assembled, and the stability and reliability of the assembly between the annular clamping member 31 and the cam assembly 2 are ensured.

In addition, in order to connect each connecting rod 3 with the piston 101 of the cylinder 10 of the air compressor, in other embodiments, as shown in fig. 4, 5 and 6, the first rod 32 of the connecting rod 3 is provided with a first pivot member 34 for connecting the piston 101, so that the first rod 32 is rotatable around the axis direction of the first pivot member 34, and the axis of the first pivot member 34 is parallel to the preset axis, by providing the first pivot member 34, the first rod 32 can further reduce the radial force generated by the piston 101 on the cylinder body of the cylinder 10 when the piston 101 is driven to perform linear motion, so as to avoid excessive wear of the cylinder body of the cylinder. Also, as shown in fig. 4, 5 and 6, the second rod 33 is provided with a second pivoting member 35 for connecting the piston 101, such that the second rod 33 is rotatable about the axis direction of the second pivoting member 35, and the axis of the second pivoting member 35 is parallel to the preset axis, and by providing the second pivoting member 35, the radial force of the piston 101 on the cylinder body of the cylinder 10 can be reduced when the second rod 33 moves linearly with the piston 101, thereby avoiding excessive wear of the cylinder body of the cylinder. For example, in some embodiments, as shown in fig. 4 and 5, the first pivot member 34 and the second pivot member 35 may each employ a bearing member by which the first lever 32 may be made rotatable about the axial direction of the first pivot member 34, while the second lever 33 may be made rotatable about the axial direction of the second pivot member 35.

Additionally, in order for the drive assembly 4 to drive the crankshaft assembly for rotation about the predetermined axis, in some embodiments, the drive assembly 4 may employ a permanent magnet motor, and the permanent magnet motor includes: the device comprises a stator and a rotor arranged in the stator, wherein the rotor can rotate relative to the stator. When the permanent magnet motor is assembled with the crank assembly 1, the rotor of the permanent magnet motor may be directly coaxially connected to the input shaft 13 of the crank assembly 1. It can be seen from this that, by directly connecting the rotor of the permanent magnet motor with the input shaft 13 of the crankshaft assembly 1, the space utilization rate of the air compressor can be improved while the volume of the air compressor is reduced, and the transmission efficiency of the driving assembly 4 in driving the crankshaft assembly 1 can be greatly improved, so that the power of the air compressor can be further improved.

Example two

A second embodiment of the present utility model relates to an air compressor, as shown in fig. 1, comprising: the crankcase 7, the drive device as described in example one and a number of cylinders 10.

As shown in fig. 2, the crankcase 7 has an axial end input side 71 in the direction of the preset axis and an axial end output side 72 opposite to the axial end input side 71. Next, as shown in fig. 3 and 7, the crankshaft assembly 1 and the connecting rods 3 of the drive apparatus are disposed in the crankcase 7, and the drive assembly 4 of the drive apparatus is disposed at the shaft end input side 71 of the crankcase 7. In addition, each cylinder 10 is circumferentially provided to the crankcase 7 around the direction of the preset axis.

In addition, as shown in fig. 2 and 3, the crank case 7 is provided with a plurality of piston holes 73 around the direction of the preset axis, and the number of the piston holes 73 is twice as large as that of the connecting rods 3, at the same time, each two piston holes 73 are arranged opposite to each other along the length direction of the connecting rod 3, each piston hole 73 is provided for one end of the connecting rod 3 to pass through the crank case 7, and one end of the connecting rod 3 is connected with the piston 101 of one of the cylinders 10, so that when each connecting rod 3 moves linearly along the length direction, the piston of each cylinder 10 can be driven to reciprocate in the cylinder body 102 of the cylinder 10, and thus the air suction and pumping of each cylinder 10 are completed.

As can be seen from the above, since the driving device includes: the crankshaft assembly 1, the cam assemblies 2, the connecting rods 3 and the driving assembly 4 can drive the crankshaft assembly 1 to rotate by taking the preset axis as a pivot axis through the driving assembly 4, meanwhile, as the cam assemblies 2 and the connecting rods 3 are the same in number and only correspond to each other, and the cam assemblies 2 are sleeved on the crankshaft assembly 1 along the direction of the preset axis, each cam assembly 2 can perform circular motion around the direction of the preset axis when the crankshaft assembly 1 rotates, so that each cam assembly 2 can drive the corresponding connecting rod 3 to perform reciprocating linear motion along the length direction of the connecting rod 3, and the driving of each connecting rod 3 to the piston of each cylinder 10 is realized, so that the air is sucked and pumped by each cylinder 10. Therefore, the air compressor can only increase the number of the air cylinders 10 and the power of the air compressor, and meanwhile, the number of the crankshaft assemblies 1 cannot be increased, so that the air compressor has smaller volume, and secondly, the air compressor has better balance and stability because only one crankshaft assembly 1 is running, and therefore unnecessary vibration of the air compressor in working is eliminated.

In addition, as shown in fig. 1 and 3, in a preferred embodiment, the air compressor further includes: the fan device 8 is arranged at the shaft end output side 72 of the crank case 7, and the fan device 8 is used for extracting air in the crank case 7, so that negative pressure capable of sucking external air into the crank case 7 is formed in the crank case 7, the crank case assembly 1 in the crank case 7 can be continuously cooled by the external air entering the crank case 7, and air which passes through the crank case assembly 1 and carries heat can be continuously extracted from the crank case 7 by the fan device 8, so that the purpose of cooling the crank case assembly 1 is achieved, oil dirt generated in the crank case 7 due to oil cooling can be avoided while the good cooling effect of the crank case assembly 1 is ensured, abrasion generated during operation of the crank case assembly is reduced, and the service life of the crank case is prolonged.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments in which the utility model is practiced and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (14)

1. A driving device of an air compressor, the driving device comprising:

The crankshaft assembly is rotatable by taking a preset axis as a pivot axis;

The cam assemblies are sleeved on the crankshaft assembly along the direction of the preset axis, and each cam assembly is used for performing circular motion around the direction of the preset axis when the crankshaft assembly rotates;

A plurality of connecting rods; the number of the connecting rods is the same as that of the cam assemblies, and the connecting rods are uniquely corresponding to the cam assemblies; each connecting rod is sleeved on the corresponding cam assembly and can rotate relative to the corresponding cam assembly; one end of each connecting rod along the length direction is connected with one cylinder of the air compressor, and the other end of each connecting rod is connected with the other cylinder of the air compressor;

The driving assembly is connected with the crankshaft assembly and used for driving the crankshaft assembly to rotate by taking the preset axis as a pivot axis;

And any cam component is used for respectively driving the only corresponding connecting rod to perform reciprocating linear motion along the length direction of the connecting rod when performing circular motion around the direction of the preset axis, so that each cylinder performs air suction and pumping.

2. The driving apparatus of an air compressor according to claim 1, wherein the crank assembly comprises:

A crankshaft;

the crank is sleeved on the crankshaft and is coaxially connected with the crankshaft;

The output shaft is connected with one end of the crankshaft and is eccentrically arranged with the crankshaft;

The input shaft is connected with the other end of the crankshaft and is eccentrically arranged with the crankshaft; the input shaft is also connected with the driving component;

The output shaft and the input shaft are coaxially arranged, the cam assemblies are sleeved on the crank and eccentrically arranged with the crank, deflection angles are formed between every two adjacent cam assemblies around the direction of the preset axis, and the angles of the deflection angles are the same.

3. The driving device of an air compressor according to claim 2, wherein three cam assemblies are provided, and the deflection angle formed between each adjacent two of the cam assemblies is 120 degrees.

4. The driving apparatus of an air compressor as set forth in claim 2, wherein each of the cam assemblies includes:

The eccentric wheel is sleeved on the crank and is eccentrically arranged with the crank;

The bearing is sleeved on the eccentric wheel and is coaxially arranged with the eccentric wheel; wherein the bearing comprises: the eccentric wheel comprises a bearing inner ring piece coaxially connected with the eccentric wheel, a bearing outer ring piece coaxially connected with the connecting rod which is uniquely corresponding to the eccentric wheel, and a plurality of rolling bodies arranged between the bearing inner ring piece and the bearing outer ring piece.

5. The driving device of an air compressor according to claim 2, wherein the crank assembly further comprises:

The positioning rings are sleeved on the crank respectively and are coaxially connected with the crank; the number of the positioning rings is greater than the number of the cam assemblies;

And one cam component is arranged between every two adjacent positioning rings.

6. The driving device of an air compressor according to claim 5, further comprising:

The first positioning assembly and the second positioning assembly are detachably arranged at two ends of the crank along the axial direction of the crank;

The first positioning assembly is abutted with the positioning ring which is arranged close to one end of the crank, and the second positioning assembly is abutted with the positioning ring which is arranged close to the other end of the crank.

7. The driving apparatus of an air compressor of claim 6, wherein the first positioning assembly comprises:

The first bearing piece is sleeved at one end of the crank and is abutted with the positioning ring arranged close to one end of the crank;

The first bracket is sleeved on the first bearing piece and used for supporting and fixing the first bearing piece; wherein the first bearing member is configured to allow the first bracket and the crank to rotate relative to each other;

the second positioning assembly includes:

The second bearing piece is sleeved at the other end of the crank and is abutted with the positioning ring arranged close to the other end of the crank;

The second bracket is sleeved on the second bearing piece and used for supporting and fixing the second bearing piece; wherein the second bearing member is configured such that the second bracket and the crank are rotatable relative to each other.

8. The driving apparatus of an air compressor as set forth in claim 1, wherein each of the links includes:

The annular clamping piece is sleeved on the cam assembly which is only corresponding to the cam assembly along the direction of the preset axis and can rotate relative to the cam assembly;

The first rod piece and the second rod piece are connected with the annular clamping piece; the first rod piece and the second rod piece are arranged opposite to each other along the length direction of the connecting rod;

In any connecting rod, the first rod is connected with one cylinder of the air compressor, and the second rod is connected with the other cylinder of the air compressor.

9. The driving device of an air compressor of claim 8, wherein the direction of the annular clamping member about the preset axis includes: the cam assembly comprises a first semi-ring and a second semi-ring which is detachably connected with the first semi-ring, wherein the first semi-ring and the second semi-ring jointly enclose a space capable of sleeving the cam assembly;

The first semi-ring is connected with the first rod piece, and the second semi-ring is connected with the second rod piece.

10. The driving device of an air compressor according to claim 9, wherein in any one of the links, the first lever is provided with a first pivoting member for connecting the cylinder, the first lever is for being rotatable about an axis direction of the first pivoting member, and an axis of the first pivoting member is parallel to the preset axis;

In any one of the connecting rods, the second rod is provided with a second pivoting part for connecting the cylinder, the second rod is used for being rotatable around the axis direction of the second pivoting part, and the axis of the second pivoting part is parallel to the preset axis.

11. The driving device of an air compressor according to claim 10, wherein the first pivot member and the second pivot member are each bearing members.

12. The drive arrangement of an air compressor according to any one of claims 1-11, wherein the drive assembly is a permanent magnet motor comprising: the rotor is rotatable relative to the stator, and the rotor is connected with the crankshaft assembly.

13. An air compressor, comprising:

the crankcase is provided with a shaft end input side and a shaft end output shaft opposite to the shaft end input side along the direction of a preset axis;

The drive device according to any one of claims 1-12; the crankshaft assembly and the connecting rods are arranged in the crankcase, and the driving assembly is arranged at the shaft end input side of the crankcase;

The cylinders are circumferentially arranged on the crankcase along the direction of the preset axis;

The crankcase is provided with a plurality of piston holes around the direction of the preset axis, the number of the piston holes is twice that of the connecting rods, every two piston holes are arranged opposite to each other along the length direction of the connecting rods, one end of each piston hole is used for the connecting rod to penetrate out of the crankcase, and one end of each connecting rod is connected with one piston of one cylinder.

14. The air compressor of claim 13, further comprising:

The fan device is arranged at the output side of the shaft end of the crankcase and is used for extracting air in the crankcase, so that negative pressure capable of sucking external air into the crankcase is formed in the crankcase.