CN220302284U - Air compressor - Google Patents

Abstract

The utility model provides an air compressor, which comprises a driving piece, a motor shell, a stator core and a rotor, wherein a cavity for accommodating the stator core and the rotor is formed in the motor shell; the box is in the both sides of driving piece respectively fixed mounting have a set of, the output shaft of rotor stretches into in the box, each the box is close to a plurality of louvres have been seted up on the perisporium of motor casing department. The utility model has the characteristic of heat dissipation of the motor.

Description

Air compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to an air compressor.

Background

The piston compressor mainly comprises a machine body, a crankshaft, a connecting rod, a piston group, a valve, a shaft seal, and the like. After the motor is started, the crankshaft is driven to rotate, the piston reciprocates through the transmission of the connecting rod, and the working volume formed by the inner wall of the cylinder, the cylinder cover and the top surface of the piston can be periodically changed. When the piston starts to move from the cylinder cover, the working volume in the cylinder is gradually increased, at the moment, gas pushes the air inlet valve along the air inlet pipe to enter the cylinder, and the air inlet valve is closed until the working volume is maximum; when the piston moves reversely, the working volume in the cylinder is reduced, the gas pressure is increased, when the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve is opened, the gas is discharged out of the cylinder until the piston moves to the limit position, and the exhaust valve is closed. The above process is repeated when the piston is again moved in the reverse direction. In a word, the crankshaft rotates once, the piston reciprocates once, and the processes of air intake, compression and exhaust are sequentially realized in the cylinder, so that one working cycle is completed.

The inventor researches find that the existing compressor has the following technical defects:

the motor drives the bent axle to rotate when working, and through the transmission of connecting rod, the piston is reciprocating motion, and the motor can produce a large amount of heat and can't in time obtain effectual heat dissipation after lasting the work a period, reduces the work efficiency and the life of compressor in turn.

Disclosure of Invention

In order to solve the problem that a large amount of heat can not be generated to effectively dissipate heat in time after the motor continuously works for a period of time, the utility model provides an air compressor capable of dissipating the motor.

To achieve the above object, the present utility model provides an air compressor comprising:

the driving piece comprises a motor shell, a stator iron core and a rotor, wherein a cavity for accommodating the stator iron core and the rotor is formed in the motor shell, the stator iron core is fixed in the cavity along the axial direction of the motor shell, a plurality of rotors are stacked along the axial direction of the motor shell, the rotors are arranged along the axial direction of the motor shell and are positioned in the middle parts of the stator iron cores, and the output shaft of the rotors extends out from two sides of the motor shell;

the box body is fixedly installed with a group on two sides of the driving piece respectively, the output shaft of the rotor stretches into the box body, and a plurality of heat dissipation holes are formed in the peripheral wall, close to the motor shell, of each box body.

Optionally, each box body comprises a chassis and an end cover;

the motor casing is characterized in that an assembling part and a heat dissipation part are formed on the machine casing, a cavity is formed on the assembling part, openings are formed in the axial direction and the radial direction of the cavity, a through hole for the rotor output shaft to extend into the cavity is formed in the side wall of the assembling part in a penetrating mode, the heat dissipation part extends from the side end of the assembling part to the motor casing, the heat dissipation part is hollow in the inside, a plurality of heat dissipation holes are formed in the peripheral wall of the heat dissipation part, and the heat dissipation part is fixedly mounted on the motor casing;

the end cover is detachably assembled on the assembly part and seals the opening of the cavity in the axial direction.

Optionally, the device also comprises a reciprocating movable component, a cylinder sleeve, a first sealing ring, a valve plate, a box cover and a second sealing ring;

the reciprocating member protrudes out of the opening of the cavity in a radial direction and is driven to reciprocate in a radial direction by the rotor output shaft;

the inside of the cylinder sleeve is hollow and arranged on the assembly part, the cylinder sleeve is positioned at an opening of the cavity in the radial direction, the inside of the cylinder sleeve is communicated with the cavity, and part of the reciprocating member is positioned inside the cylinder sleeve;

the first sealing ring is arranged between the cylinder sleeve and the assembly part;

the valve plate is arranged in the cylinder sleeve and is positioned above the reciprocating member;

the box cover is arranged on the cylinder sleeve, is connected with the assembly part through a fastener, and is positioned above the valve plate;

the second sealing ring is arranged between the box cover and the cylinder sleeve.

Optionally, further comprising a bearing and a crankshaft;

the bearing is arranged on the assembly part, and the bearing inner ring is sleeved on the output shaft of the rotor;

the crankshaft is arranged in the cavity and fixedly connected with the output shaft of the rotor, and the crankshaft is eccentrically and fixedly connected with the reciprocating member.

Optionally, an arc convex strip is protruded on the inner wall of the assembly part along the shaft of the assembly part, and an air inlet channel is penetrated on the peripheral wall of the assembly part.

Optionally, a plurality of grooves are formed in the side wall of the end cover, and the grooves are located in the cavity.

Optionally, the reciprocating member comprises a connecting rod and a piston;

the connecting rod is vertically arranged, one end of the connecting rod is fixedly connected with the crankshaft, and the other end of the connecting rod extends out of the cavity;

the piston is fixedly connected to the other end of the connecting rod and is positioned outside the cavity, an air inlet is formed in the piston in a penetrating mode, the air inlet is positioned on one side of the connecting rod, a first valve plate is fixed at the upper end of the piston, and the first valve plate can cover the air inlet.

Optionally, a plurality of heat dissipation ribs are arranged on the peripheral wall of the cylinder sleeve at intervals along the axial direction of the peripheral wall.

Optionally, the inside of the cylinder sleeve is in a stepped hole shape, and the valve plate is arranged on the step inside the cylinder sleeve;

the valve plate is provided with a passage through which gas passes, and the upper end surface of the valve plate is fixedly provided with a second valve plate covered by the passage;

the valve plate is characterized in that an air chamber is formed on the valve plate cover, a pressing column and a limiting column extend from the air chamber towards the valve plate, the pressing column leans against the valve plate and is positioned on one side of the second valve plate, and the limiting column is positioned above the second valve plate and the passageway.

Optionally, an exhaust head extends outwards from the outer periphery of the case cover, and an exhaust channel communicated with the air chamber is arranged inside the exhaust head.

Compared with the prior art, one embodiment of the utility model has the following beneficial effects:

the heat dissipation holes are formed in the box body, so that when the driving piece (the motor is understood to work), air outside the box body enters the motor shell from the heat dissipation holes to conduct heat exchange, namely, heat generated when the driving piece works is taken away, and the working energy efficiency and the service life of the compressor are improved.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

Drawings

FIG. 1 is an exploded schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the overall construction assembly of the present utility model;

FIG. 3 is a schematic view of the utility model in section within its overall structure;

fig. 4 is an exploded view of the structure of the case of the present utility model.

In the figure:

10. a driving member; 11. a motor housing; 12. a stator core; 13. a rotor;

20. a case; 21. a chassis; 211. an assembling portion; 2111. arc convex strips; 212. a heat dissipation part; 22. an end cap; 22A, grooves;

2A, radiating holes; 2B, a cavity; 2C, air intake passage

30. A reciprocating movable member; 31. a connecting rod; 32. a piston; 32A, an air inlet;

40. cylinder sleeve; 41. a heat dissipation rib;

50. a first seal ring;

60. a valve plate; 60A, aisle;

70. a case cover; 70A, air chamber; 71. a pressing column; 72. a limit column; 73. an exhaust head; 73A, an exhaust passage;

80. a second seal ring;

90. a bearing;

100. a crankshaft;

110. a fastener.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may 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 be indirectly connected to the other element through intervening elements.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-4, an air compressor, comprising:

the driving piece 10 comprises a motor shell 11, stator iron cores 12 and a rotor 13, wherein a cavity for accommodating the stator iron cores 12 and the rotor 13 is formed in the motor shell 11, the stator iron cores 12 are fixed in the cavity along the axial direction of the motor shell 11, a plurality of rotors 13 are stacked along the axial direction of the motor shell 11 and are positioned in the middle of the plurality of stator iron cores 12, and the output shaft of the rotors 13 extends out from two sides of the motor shell 11;

the box 20, it is fixed mounting respectively in the both sides of driving piece 10 a set of, and the output shaft of rotor 13 stretches into in the box 20, and a plurality of louvres 2A have been seted up on the perisporium that is close to motor casing 11 department in each box 20.

In the air compressor provided by the utility model, when a motor coil (not disclosed in the figure) wound on a stator core 12 is electrified, an electromagnetic circuit is formed among the stator core 12, the motor coil (not disclosed in the figure) and a rotor 13 to drive the rotor 13 to rotate. Of course, the assembly of the motor coil and the stator core 12 is a relatively mature manner in the prior art, and will not be described in detail in the present utility model.

In addition, the plurality of heat dissipation holes 2A are formed in the case 20, so that when the driving member 10 (which should be understood as a motor) works, air outside the case 20 enters the motor housing 11 from the plurality of heat dissipation holes 2A to exchange heat, that is, to take away heat generated when the driving member 10 works, thereby improving the working energy efficiency and the service life of the compressor.

It should be noted that, the stator core 12 and the motor housing 11 may be integrally formed.

In some embodiments, each case 20 includes a chassis 21 and an end cap 22;

the machine case 21 is provided with an assembling part 211 and a heat dissipation part 212, the assembling part 211 is provided with a cavity 2B, the cavity 2B is provided with openings in the axial direction and the radial direction, a through hole (not shown in the figure) for the output shaft of the rotor 13 to extend into the cavity 2B is penetrated through the side wall of the assembling part 211, the heat dissipation part 212 extends from the side end of the assembling part 211 towards the motor casing 11 to form a heat dissipation part 212 with a hollow inside, a plurality of heat dissipation holes 2A are positioned on the peripheral wall of the heat dissipation part 212, and the heat dissipation part 212 is fixedly arranged on the motor casing 11;

the end cap 22 is detachably fitted to the fitting portion 211, and seals the opening of the cavity 2B in the axial direction.

Specifically, the heat dissipation portion 212 extends from the side end of the assembling portion 211 toward the motor casing 11 to form a hollow heat dissipation portion 212, so that the distance between the cavity 2B and the motor casing 11 and the distance between the cavity and the iron core stator are prolonged, and when the driving piece 10 works, air can enter the heat dissipation portion 212 from the heat dissipation hole 2A, and then the heat in the motor casing 11 and the area contacted with the air are increased to achieve a heat exchange effect.

It should be noted that the above-mentioned detachable assembly may be, for example, a screw assembly or the like.

In some embodiments, further comprising a reciprocating member 30, a cylinder liner 40, a first seal ring 50, a valve plate 60, a cover 70, and a second seal ring 80;

the reciprocating member 30 protrudes out of the opening of the cavity 2B in the radial direction and is driven to reciprocate in the radial direction by the output shaft of the rotor 13;

the inside of the cylinder sleeve 40 is hollow and arranged on the assembling part 211, the cylinder sleeve 40 is positioned at the opening of the cavity 2B in the radial direction, the inside of the cylinder sleeve 40 is communicated with the cavity 2B, and part of the reciprocating member 30 is positioned inside the cylinder sleeve 40;

the first sealing ring 50 is arranged between the cylinder sleeve 40 and the assembling part 211;

the valve plate 60 is arranged inside the cylinder sleeve 40 and above the reciprocating member 30;

the case cover 70 is provided on the cylinder liner 40 and connected with the fitting portion 211 by the fastener 110, and the case cover 70 is located above the valve plate 60;

the second seal 80 is disposed between the cover 70 and the liner 40.

Specifically, the output shaft of the rotor 13 drives the reciprocating member 30 to reciprocate inside the cavity 2B and the cylinder liner 40. The first seal ring 50 and the second seal ring 80 enhance the assembly seal ring of the compressor.

The fastener 110 may be a bolt, for example.

In some embodiments, further comprising a bearing 90 and a crankshaft 100;

the bearing 90 is arranged on the assembling part 211, and the inner ring of the bearing 90 is sleeved on the output shaft of the rotor 13;

the crankshaft 100 is disposed in the cavity 2B and fixedly connected with the output shaft of the rotor 13, and the crankshaft 100 is eccentrically and fixedly connected with the reciprocating movable member 30.

Specifically, the outer ring of the bearing 90 is matched with the inner diameter of the through hole of the assembling portion 211, that is, the bearing 90 and the through hole are assembled by interference fit.

The rotor 13 rotates to drive the crankshaft 100 and the reciprocating member 30 on the crankshaft 100 to reciprocate.

In some embodiments, the inner wall of the fitting portion 211 is provided with an arc-shaped protrusion 2111 protruding along the axis thereof, and the peripheral wall of the fitting portion 211 is provided with an air inlet passage 2C therethrough.

Specifically, the gas outside the compressor is introduced into the cavity 2B from the outside through the intake passage 2C, and the gas in the cavity 2B can be compressed when the reciprocating member 30 moves downward.

In some embodiments, the side wall of the end cap 22 is provided with a plurality of grooves 22A, and the grooves 22A are located in the cavity 2B.

Specifically, when the reciprocating member 30 compresses the air, noise is generated, and the surface area is increased by the grooves 22A and the arc-shaped ribs 2111 to make the sound wave refracted in multiple segments, so that an effective noise reduction effect is obtained.

In some embodiments, the reciprocating member 30 includes a connecting rod 31 and a piston 32;

the connecting rod 31 is vertically arranged, one end of the connecting rod 31 is fixedly connected with the crankshaft 100, and the other end extends out of the cavity 2B;

the piston 32 is fixedly connected to the other end of the connecting rod 31 and is located outside the cavity 2B, an air inlet 32A is formed in the piston 32 in a penetrating manner, the air inlet 32A is located on one side of the connecting rod 31, a first valve plate (not shown) is fixed to the upper end of the piston 32, and the first valve plate can cover the air inlet 32A.

Specifically, the crankshaft 100 rotates to drive the connecting rod 31 and the piston 32 to move downwards, so as to compress the gas between the cavity 2B and the lower end surface of the piston 32, and when the gas pressure between the cavity 2B and the lower end surface of the piston 32 is greater than the pressure between the upper end surface of the piston 32 and the valve plate 60, the first valve plate is forced to be opened, so that the gas enters between the upper end surface of the piston 32 and the valve plate 60 from the gas inlet 32A.

The outer surface of the piston 32 is in contact with the inner wall of the cylinder liner 40.

In some embodiments, the peripheral wall of the cylinder liner 40 is provided with a plurality of heat dissipating ribs 41 at intervals along the axial direction thereof.

Specifically, when the piston 32 reciprocates on the inner wall of the cylinder sleeve 40 to compress the gas, heat is generated, and the heat dissipation ribs 41 can conduct and dissipate the heat of the outer periphery of the cylinder sleeve 40.

In some embodiments, the interior of the cylinder liner 40 is stepped, and the valve plate 60 is placed on the step inside the cylinder liner 40;

the valve plate 60 is penetrated with a passage 60A for gas to pass through, and the upper end surface of the valve plate 60 is fixedly provided with a second valve plate (not shown) covered by the passage 60A;

the case cover 70 is formed with an air chamber 70A, and a pressing post 71 and a limiting post 72 extend from the air chamber 70A toward the valve plate 60, the pressing post 71 leans against the valve plate 60 and is located at one side of the second valve plate, and the limiting post 72 is located above the second valve plate and the passageway 60A.

Specifically, the fastener 110 is assembled with the case 20 to apply a pressing force to the case cover 70 and the cylinder liner 40, and the pressing post 71 on the case cover 70 presses the valve plate 60 against the step of the stepped hole of the cylinder liner 40. When the connecting rod 31 and the piston 32 move towards the valve plate 60, the piston 32 compresses the gas between the upper end of the piston 32 and the lower end of the valve plate 60, so that the pressure of the gas between the upper end of the piston 32 and the lower end of the valve plate 60 is higher than the pressure between the valve plate 60 and the box cover 70, and the second valve plate 60 is forced to be opened, so that the gas enters the air chamber 70A from the passage 60A.

The limiting post 72 is located above the second valve plate, and the limiting valve plate is completely opened by taking the fixed point as an axial point, so that the quick resetting of the second valve plate is facilitated.

In some embodiments, the outer periphery of the cover 70 extends outward with the exhaust head 73, and the exhaust head 73 has an exhaust passage 73A therein that communicates with the air chamber 70A.

Specifically, the gas in the gas chamber 70A is discharged to the outside of the compressor through the discharge passage 73A.

The foregoing disclosure is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the claims herein, as equivalent changes may be made in the claims herein without departing from the scope of the utility model.

Claims (10)

1. An air compressor, comprising:

the driving piece comprises a motor shell, a stator iron core and a rotor, wherein a cavity for accommodating the stator iron core and the rotor is formed in the motor shell, the stator iron core is fixed in the cavity along the axial direction of the motor shell, a plurality of rotors are stacked along the axial direction of the motor shell, the rotors are arranged along the axial direction of the motor shell and are positioned in the middle parts of the stator iron cores, and the output shaft of the rotors extends out from two sides of the motor shell;

the box body is fixedly installed with a group on two sides of the driving piece respectively, the output shaft of the rotor stretches into the box body, and a plurality of heat dissipation holes are formed in the peripheral wall, close to the motor shell, of each box body.

2. An air compressor according to claim 1, wherein: each box body comprises a machine box and an end cover;

the motor casing is characterized in that an assembling part and a heat dissipation part are formed on the machine casing, a cavity is formed on the assembling part, openings are formed in the axial direction and the radial direction of the cavity, a through hole for the rotor output shaft to extend into the cavity is formed in the side wall of the assembling part in a penetrating mode, the heat dissipation part extends from the side end of the assembling part to the motor casing, the heat dissipation part is hollow in the inside, a plurality of heat dissipation holes are formed in the peripheral wall of the heat dissipation part, and the heat dissipation part is fixedly mounted on the motor casing;

the end cover is detachably assembled on the assembly part and seals the opening of the cavity in the axial direction.

3. An air compressor according to claim 2, wherein: the device also comprises a reciprocating movable component, a cylinder sleeve, a first sealing ring, a valve plate, a box cover and a second sealing ring;

the reciprocating member protrudes out of the opening of the cavity in a radial direction and is driven to reciprocate in a radial direction by the rotor output shaft;

the inside of the cylinder sleeve is hollow and arranged on the assembly part, the cylinder sleeve is positioned at an opening of the cavity in the radial direction, the inside of the cylinder sleeve is communicated with the cavity, and part of the reciprocating member is positioned inside the cylinder sleeve;

the first sealing ring is arranged between the cylinder sleeve and the assembly part;

the valve plate is arranged in the cylinder sleeve and is positioned above the reciprocating member;

the box cover is arranged on the cylinder sleeve, is connected with the assembly part through a fastener, and is positioned above the valve plate;

the second sealing ring is arranged between the box cover and the cylinder sleeve.

4. An air compressor according to claim 3, wherein: the device also comprises a bearing and a crankshaft;

the bearing is arranged on the assembly part, and the bearing inner ring is sleeved on the output shaft of the rotor;

the crankshaft is arranged in the cavity and fixedly connected with the output shaft of the rotor, and the crankshaft is eccentrically and fixedly connected with the reciprocating movable member.

5. An air compressor according to claim 2, wherein: the inner wall of the assembly part is provided with an arc convex strip along the shaft, and the peripheral wall of the assembly part is provided with an air inlet channel in a penetrating way.

6. An air compressor according to claim 2, wherein: and a plurality of grooves are formed in the side wall of the end cover, and the grooves are positioned in the cavity.

7. An air compressor according to claim 4, wherein: the reciprocating member comprises a connecting rod and a piston;

the connecting rod is vertically arranged, one end of the connecting rod is fixedly connected with the crankshaft, and the other end of the connecting rod extends out of the cavity;

the piston is fixedly connected to the other end of the connecting rod and is positioned outside the cavity, an air inlet is formed in the piston in a penetrating mode, the air inlet is positioned on one side of the connecting rod, a first valve plate is fixed at the upper end of the piston, and the first valve plate can cover the air inlet.

8. An air compressor according to claim 3, wherein: and a plurality of heat dissipation ribs are arranged on the peripheral wall of the cylinder sleeve at intervals along the axial direction of the peripheral wall of the cylinder sleeve.

9. An air compressor according to claim 3, wherein: the inside of the cylinder sleeve is in a stepped hole shape, and the valve plate is arranged on the step inside the cylinder sleeve;

the valve plate is provided with a passage through which gas passes, and the upper end surface of the valve plate is fixedly provided with a second valve plate covered by the passage;

the valve plate is characterized in that an air chamber is formed on the valve plate cover, a pressing column and a limiting column extend from the air chamber towards the valve plate, the pressing column leans against the valve plate and is positioned on one side of the second valve plate, and the limiting column is positioned above the second valve plate and the passageway.

10. An air compressor according to claim 9, wherein: the outer periphery of the box cover is extended to the outer side, and an exhaust passage communicated with the air chamber is formed in the exhaust head.