CN111120269A

CN111120269A - Compressor crankcase and compressor

Info

Publication number: CN111120269A
Application number: CN201911318602.0A
Authority: CN
Inventors: 谢空成
Original assignee: Jiangsu Fuwei Health Technology Co ltd
Current assignee: Jiangsu Fuwei Health Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-05-08

Abstract

The invention relates to the technical field of compressors and discloses a compressor crankcase and a compressor, which comprise a crankcase and a power crankshaft, wherein a fixing sleeve is fixedly installed on the outer wall of one side of the crankcase, a fixing groove is formed in the outer wall of one side of the fixing sleeve, a fixing bearing is fixedly installed on the inner wall of the fixing groove, a gasket is fixedly installed on the outer wall of one side of an outer shaft ring of the fixing bearing, a first needle bearing is fixedly installed on the outer wall of one side, away from the fixing bearing, of the gasket, a first limiting groove and a second limiting groove are respectively formed in the outer wall of the power crankshaft between two crankshaft blocks, a third bearing is fixedly installed in the first limiting groove, and a first connecting rod is fixedly installed on. According to the crankcase of the compressor and the compressor, the power crankshaft in the crankcase and the second belt pulley arranged outside the crankcase are coaxial during working, friction between the first connecting rod and the second connecting rod is reduced, and loss of transmission power of the power crankshaft is reduced.

Description

Compressor crankcase and compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a crankcase of a compressor and the compressor.

Background

The air compressor is a device for compressing gas, the air is widely used in industrial production, the air compressor is similar to a water pump in structure, the air compressor is of a plurality of types, the air compressor is a reciprocating piston compressor which is widely used at present, the work of the piston compressor is completed by the continuous change of the working volume formed by an air cylinder, an air valve and a piston reciprocating in the air cylinder, the work completed by the rotation of a crankshaft of the piston compressor can be divided into processes of air suction, compression and exhaust, and the piston refrigeration compressor mainly comprises a machine body, a crankshaft, a connecting rod, a piston group, a valve, a shaft seal, an oil pump, an energy regulating device, an oil circulation system and other parts.

The existing piston compressor generally utilizes a driving motor or a diesel engine to drive a belt pulley to rotate so as to drive the piston compressor to do work, the two ends of a crankshaft arranged in the piston compressor, a bearing arranged in the crankshaft and a connecting rod which are arranged in the crankshaft keep coaxial are of great importance, the connecting pieces are driven by the belt pulley arranged outside, so whether the coaxial of the crankshaft and the belt pulley inside directly influences the working efficiency and the service life of the compressor, the existing piston compressor is fixed by using a traditional screw when the crankshaft penetrates out of a crankcase, when the fixing mode is used for a long time, the concentricity of the crankshaft and the belt pulley can be deviated due to the transmission of the belt pulley and the inside of the crankcase, thereby influencing the service efficiency and the service life of a machine set, and a power crankshaft in the piston compressor is one of main components of the piston compressor, the connecting rod is a connecting piece between the crankshaft and the piston, converts the rotary motion of the crankshaft into the reciprocating motion of the piston, and transmits the power to the piston to do work on the gas.

Disclosure of Invention

Technical problem to be solved

In view of the above problems in the prior art, an aspect of the present invention is to provide a compressor crankcase and a compressor, which aim to solve the problem that the concentricity of a crankshaft and a pulley has a deviation, thereby affecting the use efficiency and the service life of a unit, and when two connecting rods arranged inside the plug compressor are used for a long time, the two connecting rods will rub against each other, thereby affecting the work efficiency of the connecting rods and reducing the service life.

Disclosure of Invention

In view of the above technical problems in the prior art, embodiments of the present invention provide a compressor crankcase and a compressor.

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:

a compressor crankcase and compressor comprising:

the outer wall of one side of the crankcase is fixedly provided with a fixed sleeve, the outer wall of one side of the fixed sleeve is provided with a fixed groove, the fixed groove is communicated with a groove of the crankcase, the inner wall of the fixed groove is fixedly provided with a fixed bearing, the outer wall of one side of an outer shaft ring of the fixed bearing is fixedly provided with a gasket, the outer wall of the gasket, which is far away from one side of the fixed bearing, is fixedly provided with a first needle bearing, the outer wall of the first needle bearing, which is far away from one side of the gasket, is fixedly provided with a mounting seat, the outer wall of one side of the mounting seat is fixedly provided with a connecting sleeve, the outer wall of the connecting sleeve sequentially penetrates through the first needle bearing and the gasket and is fixedly arranged on the inner wall of the fixed bearing, the connecting sleeve is not contacted with the gasket, The washer, the fixed sleeve and the fixed bearing are coaxial.

The outer wall of the power crankshaft is fixedly provided with two crankshaft blocks, the outer wall of the power crankshaft between the two crankshaft blocks is respectively provided with a first limiting groove and a second limiting groove, a third bearing is fixedly arranged in the first limiting groove, the outer wall of the third bearing is fixedly provided with a first connecting rod, a fourth bearing is fixedly arranged in the second limiting groove, the outer wall of the fourth bearing is fixedly provided with a second connecting rod, the outer wall of the power crankshaft between the first limiting groove and the second limiting groove is provided with a second needle bearing, the second needle bearing is not contacted with the outer wall of the power crankshaft, the outer wall of one side of the second needle bearing is welded with the outer wall of one side of the first connecting rod, and the outer wall of the other side of the second needle bearing is welded with the outer wall of one side of the second connecting rod, the first needle bearing and the second needle bearing are thrust needle bearings, and are special bearings for bearing axial force, namely, bearings for bearing force in a direction parallel to the shaft.

Preferably, a bearing groove is formed in the middle shaft of the outer wall of the mounting seat on one side of the connecting sleeve, a first bearing is arranged in the bearing groove, an outer ring of the first bearing is fixedly mounted on the inner wall of the bearing groove, and one end of the power crankshaft is fixedly mounted on the inner wall of the first bearing.

Preferably, the outer wall of the fixing sleeve is in threaded connection with a protective shell, the outer wall of the fixing sleeve is in threaded connection with the protective shell, the mounting seat is prevented from leaking outwards, a protective effect is achieved, the protective shell and the first needle bearing, the gasket, the mounting seat and the fixing bearing are coaxial, and the protective shell is not in contact with the mounting seat.

Preferably, the outer wall of one side of the fixed sleeve, which is far away from the crankcase, is fixedly provided with a fixed limiting seat, the outer wall of one side of the fixed limiting seat is provided with a fixed disk in a threaded manner, a second bearing is arranged in a groove at the middle shaft of the fixed disk, one end, which is far away from the mounting seat, of the power crankshaft is fixedly arranged on the inner wall of the second bearing, the two crankshaft blocks are positioned in a groove of the crankcase, the limiting seat and the fixed sleeve are coaxial, the fixed disk is fixed by screws in an installation mode, and the fixed disk mainly bears the acting force at the tail end of the power crankshaft, so that the mode of fixing by screws is adopted.

Preferably, the power crankshaft runs through the mounting seat and extends to the outer one end fixed mounting of mounting seat has stopper and second belt pulley, the stopper card is in the second belt pulley, the bottom fixed mounting of crankcase has the supporting seat, the top fixed mounting of supporting seat has driving motor, driving motor's output shaft fixed mounting has first belt pulley, be equipped with driving belt in the belt groove of first belt pulley, driving belt twines in the belt groove of second belt pulley.

Preferably, the bottom of supporting seat is equipped with the compression jar, the outer wall of compression jar is equipped with control switch, driving motor with control switch electric connection.

Preferably, a first piston is movably mounted at one end of the first connecting rod, a second piston is movably mounted at one end of the second connecting rod, cylinder sleeves are connected to the outer walls of two adjacent sides of the top of the crankcase in a threaded mode, and the first piston and the second piston are located in the two cylinder sleeves respectively.

Preferably, the bottom of the compression tank is movably provided with four moving wheels.

Preferably, the drive motor is of type YE 2.

Compared with the prior art, the crankcase and the compressor of the compressor provided by the embodiment of the invention have the beneficial effects that:

1. according to the invention, the fixed bearing, the gasket, the first needle bearing and the mounting seat are mutually matched for use, so that the power crankshaft in the crankcase and the second belt pulley arranged outside the crankcase are kept coaxial during working without being fixed in a traditional screw fixing mode, the working efficiency of the device is improved, and the service life of the device is prolonged.

2. According to the invention, the first limiting groove and the second limiting groove are arranged between the two crankshaft blocks, and then the third bearing and the fourth bearing are respectively clamped in the first limiting groove and the second limiting groove, so that the stability of the first connecting rod and the second connecting rod which are arranged on the outer wall in working is increased, and the second needle bearing is arranged between the first connecting rod and the second connecting rod, so that the friction between the first connecting rod and the second connecting rod is reduced, and the loss of the power transmission of the power crankshaft is reduced.

3. When the connecting rod is used for a long time, the concentricity deviation of two ends of the power crankshaft can be reduced, the stability of the device is integrally improved, the friction of an internal structure is reduced, the power loss of the device is reduced, and the work doing efficiency of the connecting rod is increased.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cylinder sleeve, second pulley and crankcase of the present invention;

FIG. 3 is a schematic view of an explosive structure inside the crankcase according to the present invention;

FIG. 4 is a schematic structural view of a fixing and limiting seat according to the present invention;

FIG. 5 is a schematic view of the power crankshaft and the first and second connecting rods mounting structure of the present invention;

FIG. 6 is a schematic view of the mounting structure of the power crankshaft on the first connecting rod and the second connecting rod according to the present invention;

FIG. 7 is a schematic view of a power crankshaft configuration of the present invention;

FIG. 8 is a schematic view of the crankcase construction of the present invention;

FIG. 9 is a schematic view of the construction of the mounting socket and the connecting sleeve of the present invention;

fig. 10 is a schematic structural view of the first needle bearing of the present invention.

In the figure: 1. a compression tank; 2. a control switch; 3. a moving wheel; 4. a first pulley; 5. a drive belt; 6. fixing the sleeve; 7. fixing the bearing; 8. a gasket; 9. a first needle bearing; 10. a first bearing; 11. a mounting seat; 12. a protective shell; 13. a cylinder sleeve; 14. a second pulley; 15. a first piston; 16. a second piston; 17. fixing a limiting seat; 18. fixing the disc; 19. a second bearing; 20. a third bearing; 21. a first link; 22. a second needle bearing; 23. a fourth bearing; 24. a second link; 25. a power crankshaft; 28. a first limit groove; 29. a second limit groove; 30. a limiting block; 31. a crankcase; 32. fixing grooves; 33. a connecting sleeve; 34. a bearing groove; 35. a supporting seat; 36. a crankshaft block; 37. a drive motor; 38. and (6) loading.

Detailed Description

So that the objects, technical solutions and advantages of the embodiments of the present disclosure will be more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

As shown in fig. 1 to 10, the present invention provides a compressor crankcase and a compressor, which are fixed by a fixing bearing 7, a washer 8, a first needle bearing 9 and a mounting seat 11 in cooperation, so that a conventional screw fixing manner is not required for fixing, a power crankshaft 25 inside a crankcase 31 and an externally disposed second pulley 14 are coaxially maintained during operation, the operation efficiency and the service life of the device are improved, the first limit groove 28 and the second limit groove 29 are disposed between two crankshaft blocks 36, then a third bearing 20 and a fourth bearing 23 are respectively clamped in the first limit groove 28 and the second limit groove 29, so that the stability of the first connecting rod 21 and the second connecting rod 24 mounted on the outer wall during operation is increased, the second needle bearing 22 is disposed between the first connecting rod 21 and the second connecting rod 24, so that the friction between the first connecting rod 21 and the second connecting rod 24 is reduced, the loss of the transmission power of the power crankshaft 25 is reduced, and the concentricity deviation of two ends of the power crankshaft 25 can be reduced when the power crankshaft is used for a long time, so that the stability of the device is integrally improved, the friction of the internal structure is reduced, and the power loss of the device is reduced.

In this embodiment, it is preferable that a fixing sleeve 6 is fixedly mounted on an outer wall of one side of the crankcase 31, a fixing groove 32 is formed on an outer wall of one side of the fixing sleeve 6, the fixing groove 32 communicates with a groove of the crankcase 31, a fixing bearing 7 is fixedly mounted on an inner wall of the fixing groove 32, a washer 8 is fixedly mounted on an outer wall of one side of an outer race of the fixing bearing 7, a first needle bearing 9 is fixedly mounted on an outer wall of one side of the washer 8 away from the washer 8 of the first needle bearing, a connecting sleeve 33 is fixedly mounted on an inner wall of the fixing bearing 7 of the washer 8 of the first needle bearing, the washer 8 of the washer, The washer 8, the fixed sleeve 6 and the fixed bearing 7 are coaxial, the connecting sleeve 33 is mounted on the inner wall of the inner race of the fixed bearing 7, and the fixed bearing is mounted on the inner wall of the fixed sleeve 6, so the fixed bearing 7 is the main supporting function.

Further, the outer wall of the power crankshaft 25 is fixedly provided with two crankshaft blocks 36, the outer wall of the power crankshaft 25 between the two crankshaft blocks 36 is respectively provided with a first limit groove 28 and a second limit groove 29, the first limit groove 28 is fixedly provided with a third bearing 20, the outer wall of the third bearing 20 is fixedly provided with a first connecting rod 21, the second limit groove 29 is fixedly provided with a fourth bearing 23, the outer wall of the fourth bearing 23 is fixedly provided with a second connecting rod 24, the outer wall of the power crankshaft 25 between the first limit groove 28 and the second limit groove 29 is provided with a second needle bearing 22, the second needle bearing 22 is not contacted with the outer wall of the power crankshaft 25, the outer wall of one side of the second needle bearing 22 is welded with the outer wall of one side of the first connecting rod 21, and the outer wall of the other side of the second needle bearing 22 is welded with the outer wall of one side of the second connecting rod 24, the first needle bearing 9 and the second needle bearing 22 are thrust needle bearings, and are dedicated bearings for receiving axial forces, i.e., bearings for forces in the direction parallel to the axis.

In the present invention, a bearing groove 34 is formed in the center axis of the outer wall of the mounting seat 11 on one side of the connecting sleeve 33, the first bearing 10 is disposed in the bearing groove 34, the outer race of the first bearing 10 is fixedly mounted on the inner wall of the bearing groove 34, and one end of the power crankshaft 25 is fixedly mounted on the inner wall of the first bearing 10.

In the further proposed technical scheme of the invention, the outer wall of the fixing sleeve 6 is in threaded connection with the protective shell 12, leakage of the mounting seat 11 is avoided, and a protective effect is achieved, the protective shell 12 and the first needle bearing 9, the gasket 8, the mounting seat 11 and the fixing bearing 7 are coaxial, and the protective shell 12 is not in contact with the mounting seat 11.

Furthermore, in the further proposed technical solution, as an optimization, the outer wall of the crankcase 31 on the side far away from the fixing sleeve 6 is fixedly provided with a fixed limiting seat 17, the outer wall of the fixed limiting seat 17 is threadedly provided with a fixed disk 18, a second bearing 19 is arranged in a groove at the center shaft of the fixed disk 18, one end of the power crankshaft 25 far away from the mounting seat 11 is fixedly arranged on the inner wall of the second bearing 19, the two crankshaft blocks 36 are positioned in a groove of the crankcase 31, the limiting seat 17 and the fixing sleeve 6 are coaxial, the mounting mode of the fixed disk 18 is screw-fixed, and the fixed disk 18 mainly bears the acting force at the tail end of the power crankshaft 25, so that the screw-fixed mode is adopted, and the later maintenance.

In a further proposed technical scheme of the invention, a power crankshaft 25 penetrates through the mounting seat 11 and extends to one end outside the mounting seat 11 to be fixedly provided with a limiting block 30 and a second belt pulley 14, the limiting block 30 is clamped in the second belt pulley 14, the bottom of the crankcase 31 is fixedly provided with a supporting seat 35, the top of the supporting seat 35 is fixedly provided with a driving motor 37, an output shaft of the driving motor 37 is fixedly provided with a first belt pulley 4, a belt groove of the first belt pulley 4 is internally provided with a transmission belt 5, and the transmission belt 5 is wound in the belt groove of the second belt pulley 14.

In some embodiments, preferably, the bottom of the supporting seat 35 is provided with a compression tank 1, the outer wall of the compression tank 1 is provided with a control switch 2, the driving motor 37 is electrically connected with the control switch 2, the bottom of the compression tank 1 is movably provided with four moving wheels 3, and the number of the moving wheels 3 is four.

Furthermore, in the present invention, one end of the first connecting rod 21 is movably mounted with a first piston 15, one end of the second connecting rod 24 is movably mounted with a second piston 16, the outer walls of two adjacent sides of the top of the crankcase 31 are both connected with cylinder sleeves 13 by screw threads, and the first piston 15 and the second piston 16 are respectively located in the two cylinder sleeves 13.

Under the mutual cooperation of the fixed disk 8, the first needle bearing 8 and the mounting seat 11, when the driving motor 37 is started, the first belt pulley 4 is driven to rotate, the first belt pulley 4 drives the second belt gear 14 to rotate through the transmission belt 5, so as to drive the connected power crankshaft 25 to rotate, because the first bearing 10 is arranged on the outer wall of the power crankshaft 25, and the first bearing 10 is arranged in the bearing groove 34 on the mounting seat 11, the friction degree of the power crankshaft 25 in the rotating process is smaller, the mounting seat 11 also rotates when the power crankshaft 25 rotates, so as to reduce the power loss of the device, then the third bearing 20 and the fourth bearing 23 which are arranged on the first limiting groove 28 and the second limiting groove 29 rotate, so that the first connecting rod 21 and the second connecting rod 24 start to rotate, and the second needle bearing 22 arranged between the first connecting rod 21 and the second connecting rod 24 starts to rotate, the friction of the first connecting rod 21 and the second connecting rod 24 is reduced, the first connecting rod 21 and the second connecting rod 24 respectively drive the first piston 15 and the second piston 16 to reciprocate in the piston cylinder 13, and in general, when the driving motor 37 is started, the power crankshaft 25, the inner race of the first bearing 10, the mounting seat 11, the inner race of the fixed bearing 7 and the upper plate 38 mounted on the side wall of the mounting seat 11 rotate.

The invention uses the fixed bearing 7, the gasket 8, the first needle bearing 9 and the mounting seat 11 to cooperate with each other, thereby the traditional screw fixing mode is not needed for fixing, the power crankshaft 25 in the crankcase 31 and the second belt pulley 14 arranged outside are kept coaxial during working, the working efficiency and the service life of the device are improved, the first limit groove 28 and the second limit groove 29 are arranged between the two crankshaft blocks 36, then the third bearing 20 and the fourth bearing 23 are respectively clamped in the limit groove 28 and the second limit groove 29, thereby the stability of the first connecting rod 21 and the second connecting rod 24 arranged on the outer wall during working is increased, the second needle bearing 22 is arranged between the first connecting rod 21 and the second connecting rod 24, thereby the friction between the first connecting rod 21 and the second connecting rod 24 is reduced, the loss of the power transmission of the power crankshaft 25 is reduced, and during long-time use, the concentricity deviation of the two ends of the power crankshaft 25 can be reduced, the stability of the device is integrally improved, the friction of the internal structure is reduced, and the power loss of the device is reduced.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

It will be appreciated by those skilled in the art that other similar joining means, such as welding, bonding or screwing, may also be used to practice the present invention.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A compressor crankcase and a compressor, characterized by comprising:

the improved structure of the oil cylinder comprises a crankcase (31), a fixing sleeve (6) is fixedly installed on the outer wall of one side of the crankcase (31), a fixing groove (32) is formed in the outer wall of one side of the fixing sleeve (6), the fixing groove (32) is communicated with a groove of the crankcase (31), a fixing bearing (7) is fixedly installed on the inner wall of the fixing groove (32), a gasket (8) is fixedly installed on the outer wall of one side of an outer ring of the fixing bearing (7), a first needle bearing (9) is fixedly installed on the outer wall of one side, far away from the fixing bearing (7), of the gasket (8) of the first needle bearing (9), a mounting seat (11) is fixedly installed on the outer wall of one side of the mounting seat (11), a connecting sleeve (33) is fixedly installed on the outer wall of one side of the mounting seat (11), and the outer wall of the connecting sleeve (33, the mounting seat (11) is fixedly mounted on the inner wall of the fixed bearing (7), and the first needle bearing (9), the gasket (8), the fixed sleeve (6) and the fixed bearing (7) are coaxial;

the power crankshaft (25), the outer wall of the power crankshaft (25) is fixedly provided with two crankshaft blocks (36), the outer wall of the power crankshaft (25) between the two crankshaft blocks (36) is respectively provided with a first limiting groove (28) and a second limiting groove (29), a third bearing (20) is fixedly arranged in the first limiting groove (28), the outer wall of the third bearing (20) is fixedly provided with a first connecting rod (21), a fourth bearing (23) is fixedly arranged in the second limiting groove (29), the outer wall of the fourth bearing (23) is fixedly provided with a second connecting rod (24), the outer wall of the power crankshaft (25) between the first limiting groove (28) and the second limiting groove (29) is provided with a second needle bearing (22), and the second needle bearing (22) is not contacted with the outer wall of the power crankshaft (25), the outer wall of one side of the second needle bearing (22) is welded with the outer wall of one side of the first connecting rod (21), and the outer wall of the other side of the second needle bearing (22) is welded with the outer wall of one side of the second connecting rod (24).

2. A compressor crankcase and compressor in accordance with claim 1, wherein: bearing groove (34) have been seted up in mount pad (11) position in the axis department of connecting sleeve (33) one side outer wall, be equipped with first bearing (10) in bearing groove (34), the outer race fixed mounting of first bearing (10) on the inner wall of bearing groove (34), the one end fixed mounting of power crankshaft (25) is in on the inner wall of first bearing (10).

3. A compressor crankcase and compressor in accordance with claim 1, wherein: the outer wall of the fixed sleeve (6) is in threaded connection with a protective shell (12), the protective shell (12) and the first needle bearing (9), the gasket (8), the mounting seat (11) and the fixed bearing (7) are coaxial, and the protective shell (12) is not in contact with the mounting seat (11).

4. A compressor crankcase and compressor in accordance with claim 1, wherein: keep away from crankcase (31) the outer wall fixed mounting of fixed sleeve (6) one side has fixed spacing seat (17), fixed disk (18) are installed to the outer wall screw thread of fixed spacing seat (17) one side, the inslot of fixed disk (18) axis department is equipped with second bearing (19), power crankshaft (25) are kept away from the one end fixed mounting of mount pad (11) is in on the inner wall of second bearing (19), two crankshaft piece (36) are located in the recess of crankcase (31), fixed spacing seat (17) with fixed sleeve (6) are with the axle center.

5. A compressor crankcase and compressor in accordance with claim 1, wherein: power crankshaft (25) runs through mount pad (11) and extend to mount pad (11) outer one end fixed mounting has stopper (30) and second belt pulley (14), stopper (30) card is in second belt pulley (14), the bottom fixed mounting of crankcase (31) has supporting seat (35), the top fixed mounting of supporting seat (35) has driving motor (37), the output shaft fixed mounting of driving motor (37) has first belt pulley (4), be equipped with driving belt (5) in the belt groove of first belt pulley (4), driving belt (5) winding is in the belt inslot of second belt pulley (14).

6. A compressor crankcase and compressor in accordance with claim 5, wherein: the bottom of supporting seat (35) is equipped with compression jar (1), the outer wall of compression jar (1) is equipped with control switch (2), driving motor (37) with control switch (2) electric connection.

7. A compressor crankcase and compressor in accordance with claim 1, wherein: one end of the first connecting rod (21) is movably provided with a first piston (15), one end of the second connecting rod (24) is movably provided with a second piston (16), the outer walls of two adjacent sides of the top of the crankcase (31) are in threaded connection with cylinder sleeves (13), and the first piston (15) and the second piston (16) are respectively positioned in the two cylinder sleeves (13).

8. A compressor crankcase and compressor in accordance with claim 6, wherein: the bottom movable mounting of compression jar (1) has removal wheel (3), the quantity of removing wheel (3) is four.