CN108678929B

CN108678929B - Air compression pump and air compressor

Info

Publication number: CN108678929B
Application number: CN201810356149.1A
Authority: CN
Inventors: 陆为东; 谭建军; 王召智
Original assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Current assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Priority date: 2018-04-19
Filing date: 2018-04-19
Publication date: 2020-04-17
Anticipated expiration: 2038-04-19
Also published as: CN108678929A

Abstract

An air compression pump comprises a crankcase, a crank located in the crankcase, a first fan, an air cylinder, a piston and a connecting rod, wherein the first fan can rotate under the driving of the crank, the piston can reciprocate in the air cylinder, the connecting rod is used for driving the piston to move, the crankcase is provided with at least one ventilation opening which is communicated with the inside of the crankcase and the outside of the crankcase, and a first air flow driven by the first fan when rotating flows out of the crankcase through the at least one ventilation opening and flows through the outer surface of the air cylinder so as to accelerate the heat dissipation of the outer surface of the air cylinder. By means of the design, the first airflow flowing out of the crankcase through the at least one ventilation opening flows through the outer surface of the cylinder, and the heat of the outer surface of the cylinder is effectively dissipated.

Description

Air compression pump and air compressor

[ technical field ] A method for producing a semiconductor device

The invention relates to an air compression pump and an air compressor thereof, in particular to a ventilation and heat dissipation structure of a crankcase and an air cylinder of the air compression pump.

[ background of the invention ]

Air compressor pumps are used to provide compressed air, to provide aerodynamic power to pneumatic tools (e.g., pneumatic nailers, sanding tools, painting tools, etc.) or for air pumping, etc. The cylinder will become hot gradually in the process of piston reciprocating compressed air, lacks the pertinence heat dissipation scheme to the cylinder in the prior art.

[ summary of the invention ]

The invention aims to solve the problem of providing the air compression pump with the air cylinder having a good heat dissipation effect.

In order to solve the technical problems, the invention adopts the following technical scheme: an air compression pump comprises a crankcase, a crank located in the crankcase, a first fan, an air cylinder, a piston and a connecting rod, wherein the first fan can rotate under the driving of the crank, the piston can reciprocate in the air cylinder, the connecting rod is used for driving the piston to move, the crankcase is provided with at least one ventilation opening which is communicated with the inside of the crankcase and the outside of the crankcase, and a first air flow driven by the first fan when rotating flows out of the crankcase through the at least one ventilation opening and flows through the outer surface of the air cylinder so as to accelerate the heat dissipation of the outer surface of the air cylinder.

By means of the design, the first airflow flowing out of the crankcase through the at least one ventilation opening flows through the outer surface of the cylinder, and the heat of the outer surface of the cylinder is effectively dissipated.

Furthermore, the crankcase is equipped with the inside opening with the cylinder of intercommunication crankcase, the connecting rod runs through the opening, the second air current that drives when first fan rotates passes through the opening flows out the crankcase and flows into inside the cylinder. So design, borrow by vent and opening, first fan has had simultaneously to cylinder outside surface and the inside air supply of cylinder, can blow the heat dissipation to cylinder outside surface when giving the inside tonifying qi of cylinder.

Furthermore, the air compression pump further comprises a cylinder cover and a valve plate located between the cylinder cover and the cylinder, the piston is provided with a first channel and an air inlet valve plate used for closing and opening the first channel, and the second air flow can enter between the piston and the valve plate through the first channel after entering the inside of the cylinder.

Furthermore, the crankcase still is equipped with the roof that is located between crank and the cylinder, opening, vent run through respectively the roof.

Furthermore, the air compression pump also comprises a motor and a first screw, wherein the motor can drive the crank to rotate, the first screw penetrates into the crank and fixes the rotating shaft of the motor and the crank, and the crankcase is also provided with a position-giving opening which penetrates through the inside of the crankcase and the outside of the crankcase and is used for the first screw to pass through.

Further, the crankcase still is equipped with the diapire relative with the roof, let the position mouth run through the diapire.

Furthermore, the number of the at least one ventilation opening is multiple, the top wall is provided with annular ribs for separating the through opening from the ventilation openings, and the annular ribs surround the through opening.

Furthermore, the annular rib is annular, and the roof is equipped with the interval rib that separates adjacent vent, and each interval rib extends from annular rib radial outside respectively.

Further, the roof still is equipped with a plurality of outer walls, the interval between outer wall and the annular muscle forms the vent, the cylinder is including being located its outside a plurality of first fin, first fin lower extreme pastes or presses close to the upper end of corresponding outer wall.

Further, the number of the at least one ventilation opening is multiple, and the top wall is provided with a spacing rib for separating adjacent ventilation openings.

Further, the quantity of an at least vent is a plurality of and respectively with the opening looks interval, and each vent distributes in the periphery of opening and centers on jointly the opening.

Further, the cylinder includes at least one first heat sink located outside the cylinder, and the first air flow driven by the rotation of the first fan is blown to the at least one first heat sink through the at least one vent.

Furthermore, the number of the at least one first radiating fin is multiple, the first spacing grooves are formed by the intervals between the adjacent first radiating fins, the first spacing grooves are communicated with the corresponding ventilation openings, and at least part of the first airflow is blown into the first spacing grooves. By the design, the first air flow can smoothly flow into the first spacing groove to form more effective heat exchange with the surface of the first radiating fin, and the heat dissipation of the first radiating fin is enhanced.

Furthermore, the crankcase still is equipped with the roof that is located between crank and the cylinder, the vent runs through the roof, the cylinder outside has the first interval groove that is located between the adjacent first fin, the projection that first interval groove was thrown to roof top surface along a first direction at least part falls into corresponding vent, first direction perpendicular to roof top surface. By the design, the first airflow can flow into the first spacing groove to form more effective heat exchange with the surface of the first radiating fin, and the heat dissipation of the first radiating fin is enhanced.

Furthermore, the crankcase still is equipped with the roof that is located between crank and the cylinder, the vent runs through the roof, the projection that first fin was thrown to the roof top surface along a first direction at least part falls into corresponding vent, first direction perpendicular to roof top surface.

Further, the air compression pump also comprises a motor capable of driving the crank to rotate, a rotating shaft of the motor is fixed with the crank, the first radiating fins are perpendicular to the top wall top surface, and the top wall top surface is parallel to the rotating shaft of the motor.

Further, the lower end of the first cooling fin faces the corresponding ventilation opening.

Further, the first cooling fins protrude outwards along the radial direction of the cylinder, and the first cooling fins extend outwards beyond the corresponding ventilation openings in the radial direction.

Furthermore, the number of the first radiating fins is multiple and is distributed on the periphery of the cylinder in a radial mode.

Further, still including driving crank pivoted motor, the pivot and the crank of motor are fixed mutually, the cylinder has opposite first side and second side, the cylinder second side is located between motor and the cylinder first side, at least one first fin is including the first side fin that is located the cylinder first side, the second side fin that is located the cylinder second side, at least one vent is including first side vent and the second side vent that is located the opposite both sides of opening, part first air current blows to first side fin through first side vent, and part in addition first air current blows to second side fin through second side vent.

Further, the cylinder has a third side and a fourth side opposite to each other, the first side, the second side, the third side, and the fourth side of the cylinder surround the periphery of the connecting rod together, the at least one first heat sink further includes a third side heat sink located on the third side of the cylinder and a fourth side heat sink located on the fourth side of the cylinder, the at least one ventilation opening further includes a third side ventilation opening and a fourth side ventilation opening located on two sides opposite to the through opening, a portion of the first air flow blows toward the third side heat sink through the third side ventilation opening, and a portion of the first air flow blows toward the fourth side heat sink through the fourth side ventilation opening. By the design, the radiating fins are distributed on the periphery of the cylinder and matched with the corresponding ventilation openings, so that the radiating performance of the cylinder is obviously improved.

Further, the air compression pump still includes can drive crank pivoted motor, be fixed in motor shaft's second fan, the pivot and the crank of motor are fixed mutually, the second fan is located the opposite both sides of motor with the crankcase, the second fan is located the outside of motor, the third air current that drives when the second fan rotates blows in inside the motor, the fourth air current that drives when the second fan rotates can directly blow the second side fin without sheltering from.

Further, the air compression pump further comprises a cylinder cover and a valve plate located between the cylinder cover and the cylinder, the cylinder cover, the valve plate, the cylinder and the crankcase are sequentially stacked and fixed together, and the cylinder cover is provided with a plurality of second cooling fins.

Furthermore, the air compression pump also comprises a motor capable of driving the crank to rotate, and a first bearing which is positioned in the crank case and is arranged at one end of the connecting rod, wherein a rotating shaft of the motor is fixed with the crank, the crank comprises a transmission shaft which is eccentrically arranged, the motor drives the connecting rod to move through the transmission shaft and the first bearing, and the first fan is eccentrically fixed on the transmission shaft.

Further, the transmission shaft and the rotating shaft of the motor are arranged in parallel but not coaxially.

Further, the central axis of the motor rotating shaft passes through the exact center of the first fan. Although the first fan is not centered on the transmission shaft, the first fan rotates around its center, so that the first fan 41 rotates smoothly.

Further, the air compression pump further comprises a motor capable of driving the crank to rotate, a first bearing located in the crankcase and configured at one end of the connecting rod, a rotating shaft of the motor is fixed with the crank, the crank comprises a transmission shaft, the transmission shaft comprises a first shaft portion and a second shaft portion which are coaxially arranged, the first shaft portion is fixed with an inner ring of the first bearing, the second shaft portion is fixed with the first fan, and the second shaft portion is parallel to the rotating shaft of the motor but not coaxially arranged with the rotating shaft of the motor.

Further, the air compressor pump is still including being fixed in the baffle of crankcase, can driving crank pivoted motor, the pivot and the crank of motor are fixed mutually, the baffle is located the opposite both sides of crankcase with the motor, first fan is located between baffle and the crank, a plurality of first ventilation holes have been seted up to the baffle, first ventilation hole intercommunication crankcase is inside and the crankcase is outside.

Further, the baffle includes the medial surface that faces first fan, be equipped with ventilative amortization layer on the baffle medial surface. By the design, the first ventilation holes can be arranged or arranged more than needed, the air intake capacity in the crankcase is enhanced, the noise is not excessively limited by the transmission of the first ventilation holes to the noise, and the first ventilation holes are arranged or arranged less than needed.

The invention also provides an air compressor pump, which comprises a crankcase, a crank positioned in the crankcase, a first fan capable of rotating under the drive of the crank, an air cylinder, a piston capable of reciprocating in the air cylinder, and a connecting rod for driving the piston to move.

Further, the crankcase is equipped with inside and the cylinder inside opening of intercommunication crankcase, is located the roof between crank and the cylinder, the connecting rod runs through the opening, the second air current that drives when first fan rotates flows through the opening flows out the crankcase flows into inside the cylinder, opening, vent run through respectively the roof.

Furthermore, the quantity of at least one vent is a plurality of, and each vent distributes in the periphery of through-hole and respectively with through-hole looks interval.

The invention also provides an air compressor which comprises the air compression pump, an air storage tank and an air conveying pipe communicated between the air compression pump and the air storage tank.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a perspective view of an air compressor of the present invention;

FIG. 2 is a perspective view of the air compressor pump of the present invention;

FIG. 3 is a top view of the air compressor pump of the present invention;

FIG. 4 is an exploded view of the air compressor pump of the present invention;

FIG. 5 is a longitudinal cross-sectional view of the air compressor pump of the present invention;

FIG. 6 is a side view of the air compressor pump of the present invention;

FIG. 7 is an angled perspective view of the crankcase of the air compressor pump of the present invention;

FIG. 8 is a perspective view of an alternative angle of the crankcase of the air compressor pump of the present invention;

FIG. 9 is a perspective view of yet another angle of the crankcase of the air compressor pump of the present invention;

fig. 10 is a partially enlarged view of fig. 4.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Referring to fig. 1, the air compressor of the present invention includes an air tank 10, an outlet manifold (not numbered) connected to the air tank 10, a pressure gauge (not numbered) disposed on the outlet manifold, a pressure regulating valve (not numbered) disposed on the outlet manifold, a plurality of foot supports 11, a bracket 12, an air pipe 13, and an air compressor pump, wherein the air tank 10, the foot supports 11, and the air compressor pump are respectively fixed to the bracket 12, and the bracket 12 is provided with a handle 120 and a fixing plate 121 for fixing the air compressor pump.

Referring to fig. 2 to 10, the air compression pump of the present invention includes a motor, a crankcase 2, a crank 3 located in the crankcase 2, a first bearing 40, a first fan 41 driven by the crank 3 to rotate, a cylinder 5, a piston 6 capable of reciprocating in the cylinder 5, a connecting rod 42 for driving the piston 6 to reciprocate in the cylinder 5, and a second fan 43. The motor is assembled and fixed with the crankcase 2. The motor comprises a stator 70, a rotor, a carbon brush assembly 71, a second bearing 72, a third bearing 73, a shell 74 and an end cover 75, wherein the rotor comprises a coil module 760, a commutator 761 and a rotating shaft 762, the rotating shaft 762 of the motor sequentially penetrates through the second bearing 72, the coil module 760, the commutator 761 and the third bearing 73, an inner ring of the second bearing 72 and an inner ring of the third bearing 73 are respectively fixed on the rotating shaft 762 of the motor, the motor can drive the crank 3 to rotate, the rotating shaft 762 of the motor is fixed with the crank 3, the motor drives the piston 6 to reciprocate in the cylinder 5 to compress air, the compressed air is stored in the air storage tank 10, and the rated power of the motor is between 100w and 3000w, preferably between 200w and 1800 w. The connecting rod 42 is connected between the piston 6 and the crank 3 for driving the piston 6 to move in the cylinder 5, and the end cap 75 is provided with a bearing cavity 750 for mounting the third bearing 73.

Crankcase 2 is equipped with inside and the outside at least vent of crankcase 2 of intercommunication crankcase 2, and the first air current that drives when first fan 41 rotates flows out crankcase 2 and the outside surface of flow cylinder 5 through aforementioned vent to accelerate the outside surface heat dissipation of cylinder 5, so design, borrow by the vent, first fan 41 drives the air current that the air flow formed and blows to the outside surface of cylinder 5, can dispel the heat to the outside surface of cylinder 5 by the efficient. The crankcase 2 is provided with a through opening 20 for communicating the inside of the crankcase 2 with the inside of the cylinder 5, the connecting rod 42 penetrates through the through opening 20, and the second air flow generated by the rotation of the first fan 41 flows out of the crankcase 2 through the through opening 20 and flows into the inside of the cylinder 5. By such design, the ventilation opening and the through opening 20 are provided, the first fan 41 supplies air to the outer surface of the cylinder 5 and the inside of the cylinder 5, and the sufficient air inside the cylinder 5 and the efficient heat dissipation of the outer surface of the acceleration cylinder 5 can be provided. In this embodiment, the first fan 41 is not directly blown to the ventilation opening and the through opening 20, the first fan 41 rotates to make the air outside the crankcase 2 enter the crankcase 2, and then flows out of the crankcase 2 through the ventilation opening and the through opening 20, so as to form an air flow, the first air flow and the second air flow are generated by the air inside the crankcase 2 overflowing due to the rotation of the first fan 41, and the first fan 41 forms a power source of the first air flow and the second air flow, so that the first air flow and the second air flow are driven by the first fan 41. The second airflow generated by the rotation of the first fan 41 flows out of the crankcase 2 through the opening 20 and flows into the cylinder 5, and the first airflow generated by the rotation of the first fan 41 flows out of the cylinder 5 through the opening.

The air compression pump further comprises a cylinder cover 80, a valve plate 81 located between the cylinder cover 80 and the cylinder 5, and a plurality of long screws 82, the piston 6 is provided with a first channel 60, an air inlet valve plate 61 used for closing and opening the first channel 60, an end plate 62, a screw 63 for locking the air inlet valve plate 61 on the end plate 62, a piston ring 64, and a pressing ring 65, and after the second air flow flows into the cylinder 5, the second air flow can pass through the first channel 60 and open the air inlet valve plate 61 to enter between the piston 6 and the valve plate 81. The first passage 60 penetrates the end plate 62, the end plate 62 of the present embodiment is integrally connected to the connecting rod 42, and the retainer 65 is fixed to the end plate 62 to lock the piston ring 64 to the end plate 62. Each long screw 82 penetrates the cylinder cover 80, the valve plate 81, and the cylinder 5 in sequence and is fixed to the crankcase 2, and the cylinder cover 80, the valve plate 81, the cylinder 5, and the crankcase 2 are stacked in sequence and fixed to each other.

The cylinder cover 80 is provided with an air outlet 800 communicated with the inside of the cylinder cover 80 and a plurality of second cooling fins 801, and the valve plate 81 is provided with a second channel 810 and an air outlet valve plate 811 used for closing and opening the second channel 810. When the air compression pump works, air passes through the first channel 60 and pushes away the air inlet valve plate 61 to enter between the piston 6 and the valve plate 81, further passes through the second channel 810 and pushes away the air outlet valve plate 811 to enter the cylinder cover 80, and further is output from the air outlet 800 of the cylinder cover 80. The second fins 801 extend transversely and the first fins extend longitudinally.

The crankcase 2 is further provided with a top wall 21 located between the crank 3 and the cylinder 5, and the through opening 20 and the ventilation opening respectively penetrate through the top wall 21. The cylinder 5 is assembled on the top wall 21 of the crankcase 2, and the top wall 21 is provided with screw holes 210 locked with the long screws 82.

The air compressor pump further comprises a first screw 44, the first screw 44 penetrates through the crank 3 and fixes the motor rotating shaft 762 and the crank 3, the crankcase 2 is further provided with a bottom wall 22 opposite to the top wall 21, and a position-giving opening 23 which penetrates through the inside of the crankcase 2 and the outside of the crankcase 2 and is used for the first screw 44 to penetrate through. The abdication opening 23 penetrates through the bottom wall 22, the crank 3 can be placed into the crank case 2 and sleeved at one end of the motor rotating shaft 762 when assembling, at the moment, the motor rotating shaft 762 of the crank 3 is in a loose fit state, the screw hole 30 on the crank 3 is aligned with the abdication opening 23, then the first screw 44 is placed into the screw hole 30 from the abdication opening 23 and further screwed, and finally the first screw 44 is screwed to the bottom to fix the motor rotating shaft 762 and the crank 3. In the present embodiment, the relief opening 23 is located at the center of the bottom wall 22, and when the piston 6 is at the highest position (as shown in fig. 5, the connecting rod 42 is in the vertical state), the screw hole 30 of the crank 3 is aligned with the relief opening 23.

The number of the ventilation openings is multiple, the top wall 21 is provided with annular ribs 211 for separating the through openings 20 from the ventilation openings, and the annular ribs 211 surround the through openings 20. The annular rib 211 is annular, the top wall 21 is further provided with spacing ribs 212 for separating adjacent ventilation openings, each spacing rib 212 is integrally connected to the radial outer side of the annular rib 211, and each spacing rib 212 extends radially outward from the annular rib 211, i.e., the radial direction is the radial direction of the annular rib 211. The top wall 21 is further provided with a spacing rib 212 that separates adjacent ventilation openings, the spacing rib 212 being integrally connected to a radially outer side of the annular rib 211, the spacing rib 212 extending radially outwardly from the annular rib 211. Each vent is spaced apart from through-opening 20, and each vent distributes in the periphery of through-opening 20 and surrounds through-opening 20 jointly. The top wall 21 is further provided with a plurality of outer walls 214, the space between the outer walls 214 and the annular ribs 211 forms the ventilation openings, and the spacing ribs 212 are connected between the outer walls 214 and the annular ribs 211.

The cylinder 5 includes at least one first heat sink located outside thereof, and the first air flow driven by the rotation of the first fan 41 is blown to the first heat sink through the vent to accelerate the heat dissipation of the first heat sink. The surface of the first fin constitutes a part of the outer surface of the cylinder 5. The number of the first cooling fins is multiple, the cylinder 5 is externally provided with a plurality of first spacing grooves 50, specifically, the first spacing grooves 50 are formed by the spacing between the adjacent first cooling fins, the first spacing grooves 50 are communicated with the corresponding ventilation openings, and at least part of first air flows into the first spacing grooves 50 through the ventilation openings. The first spaced grooves 50 face the corresponding ventilation openings. The cylinder 5 is installed on the top surface 213 of the top wall 21, the projection of the first spacing groove 50 projected to the top surface 213 of the top wall 21 along a first direction at least partially falls into the ventilation opening, and the first direction is perpendicular to the top surface 213 of the top wall 21. The projection of the first heat sink projected to the top surface 213 of the top wall 21 along a first direction at least partially falls into the ventilation opening, so that the first air flow can flow more over the surface of the first heat sink to form more effective heat exchange with the surface of the first heat sink, thereby enhancing the heat dissipation of the first heat sink. The first heat sink is perpendicular to the top surface 213 of the top wall 21, and the top surface 213 of the top wall 21 is parallel to the motor rotating shaft 762. The lower ends of the first radiating fins face the corresponding ventilation openings. The cylinder 5 forms a cylindrical space inside, the piston 6 is located in the cylindrical space, each first cooling fin is radially distributed in the circumferential direction of the cylinder 5, the first cooling fins are radially distributed on the periphery of the cylinder 5, the first cooling fins protrude outwards in the radial direction of the cylinder 5, and the first cooling fins exceed the corresponding ventilation openings in the radial direction. The first fins partially overlap the corresponding outer wall 214 in the first direction, and the lower ends of the first fins abut the upper ends of the corresponding outer wall 214, as well as: the lower end of the first heat sink is proximate to the upper end of the corresponding outer wall 214, where the proximity requirement is that the gap between the lower end of the first heat sink and the upper end of the outer wall 214 is less than 1 cm.

The cylinder 5 has a first side 51 and a second side 52 opposite to each other, the second side 52 of the cylinder 5 is located between the motor and the first side 51 of the cylinder 5, the first heat sinks include a first side heat sink 53 located on the first side 51 of the cylinder 5 and a second side heat sink 54 located on the second side 52 of the cylinder 5, the ventilation openings include a first side ventilation opening 24 and a second side ventilation opening 25 located on opposite sides of the through opening 20, a part of the first air flow is blown to the first side heat sink 53 through the first side ventilation opening 24, and a part of the first air flow is blown to the second side heat sink 54 through the second side ventilation opening 25. The cylinder 5 further has a third side 55 and a fourth side 56 opposite to each other, the first side 51, the second side 52, the third side 55 and the fourth side 56 of the cylinder 5 together surround the periphery of the connecting rod 42, the first heat sinks further include a third side heat sink 57 located on the third side 55 of the cylinder 5 and a fourth side heat sink 58 located on the fourth side 56 of the cylinder 5, the ventilation openings further include a third ventilation opening 26 and a fourth ventilation opening 27 located on opposite sides of the through opening 20, a part of the first air flow is blown to the third side heat sink 57 through the third ventilation opening 26, and a part of the first air flow is blown to the fourth side heat sink 58 through the fourth ventilation opening 27. By the design, the first radiating fins are distributed on the periphery of the cylinder 5 and matched with the corresponding ventilation openings, so that the radiating performance of the cylinder 5 is obviously improved.

The second fan 43 is fixed on the motor rotating shaft 762, the second fan 43 and the crank case 2 are located on two opposite sides of the motor, the second fan 43 is located outside the motor, the third airflow driven by the rotation of the second fan 43 is blown into the motor, and the fourth airflow driven by the rotation of the second fan 43 can be directly blown to the second side heat sink 54 without being blocked. The motor housing 74 is provided with a plurality of second ventilation holes 740 communicating the inside of the motor with the outside of the motor, and the air blown into the motor by the second fan 43 flows out of the motor through the second ventilation holes 740.

The first bearing 40 is located in the crankcase 2 and disposed at one end of the connecting rod 42, the crank 3 includes a transmission shaft eccentrically disposed, the transmission shaft is not coaxially disposed with the motor rotating shaft 762 when the transmission shaft is eccentrically disposed, the motor drives the connecting rod 42 to move through the transmission shaft and the first bearing 40, the first fan 41 is eccentrically fixed to the transmission shaft, the position on the first fan 41 fixed to the transmission shaft is not the exact center position of the first fan 41 but is deviated from the exact center position of the first fan 41, and the transmission shaft is parallel to the motor rotating shaft 762 but is not coaxially disposed. The coaxial arrangement of the invention means that the axes are coincident. The central axis of the motor rotating shaft 762 passes through the center of the first fan 41, and thus, although the position of the first fan 41 fixed to the transmission shaft is not the center, the first fan 41 rotates around the center thereof when rotating, so that the rotation of the first fan 41 can be relatively smooth, the central axis of the motor rotating shaft 762 is parallel to but staggered with the central axis of the transmission shaft, and the central axis of the motor rotating shaft 762 and the central axis of the transmission shaft are actually virtual straight lines, which is defined for convenience of describing a positional relationship and the like. The center of gravity of the first fan 41 is located at the center thereof. The transmission shaft includes a first shaft portion 31 and a second shaft portion 32, and a tapered connection portion 33 connected between the first shaft portion 31 and the second shaft portion 32, the first shaft portion 31 is fixed to the inner ring of the first bearing 40, the second shaft portion 32 is fixed to the first fan 41, and the second shaft portion 32 is parallel to the motor rotation shaft 762 but is not coaxially disposed. The first shaft portion 31 is disposed coaxially with the second shaft portion 32, and a radial dimension of the first shaft portion 31 is larger than a radial dimension of the second shaft portion 32. The second shaft portion 32 is provided with a screw hole 320, the first fan 41 is provided with a recess 410, the second shaft portion 32 is inserted into the recess 410, and the second screw 45 is locked to the screw hole 320 so as to fix the first fan 41 and the second shaft portion 32.

The air compressor pump further comprises a baffle plate 46 fixed on the crankcase 2, the baffle plate 46 and the motor are located on two opposite sides of the crankcase 2, the first fan 41 is located between the baffle plate 46 and the crank 3, the baffle plate 46 is provided with a plurality of first ventilation holes 460, the first ventilation holes 460 are communicated with the inside of the crankcase 2 and the outside of the crankcase 2, and when the crank 3 drives the first fan 41 to rotate, outside air enters the crankcase 2 through the first ventilation holes 460. The baffle 46 includes an inner surface 461 facing the first fan 41, and an air-permeable sound deadening layer (not shown) is disposed on the inner surface 461 of the baffle 46, and the sound deadening layer is preferably a sound deadening sponge attached to the inner surface 461 of the baffle 46. The crankcase 2 is further provided with a side wall 28 opposite the baffle 46, the end cap 75 is located on opposite sides of the motor from the crankcase 2 side wall 28, and the crankcase 2 side wall 28 is provided with a bearing pocket 280 for mounting the second bearing 72.

While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides an air compression pump, includes the crankcase, be located the crank of crankcase, can drive crank pivoted motor, can drive down pivoted first fan, cylinder, can be in the cylinder reciprocating motion's piston, be used for driving the connecting rod of piston motion, be fixed in the second fan of motor shaft, valve plate, four long screws, be located the crankcase and dispose in the first bearing of connecting rod one end, motor shaft is fixed mutually with the crank, its characterized in that: the crankcase is provided with a top wall positioned between the crank and the cylinder and a plurality of ventilation openings communicating the inside of the crankcase with the outside of the crankcase, and first air driven by the rotation of the first fan flows out of the crankcase through the ventilation openings and flows through the outer surface of the cylinder so as to accelerate the heat dissipation of the outer surface of the cylinder;

the air compression pump also comprises a first screw penetrating through a screw hole of the crank and fixing a rotating shaft of the motor and the crank, the crankcase is also provided with a through hole communicating the inside of the crankcase and the inside of the cylinder, a yielding port penetrating through the inside of the crankcase and the outside of the crankcase and allowing the first screw to pass through, and a bottom wall opposite to the top wall, the yielding port is positioned in the middle of the bottom wall, and the screw hole of the crank is aligned to the yielding port when the piston is positioned at the highest position;

each long screw penetrates through the valve plate and the air cylinder and is fixed on the crankcase, the top wall is provided with four screw holes locked with the corresponding long screws, the outline of the top wall is rectangular, the four screw holes are distributed at four corners of the top wall, each screw hole is respectively arranged between the adjacent ventilation openings, and the four screw holes and the ventilation openings are jointly arranged to form an annular ring surrounding the through openings;

the through opening and the ventilation opening respectively penetrate through the top wall; a second air flow driven by the rotation of the first fan flows out of the crankcase through the through hole and flows into the cylinder; the piston is provided with a first channel and an air inlet valve plate for closing and opening the first channel, and the second air flow can enter between the piston and the valve plate through the first channel after entering the cylinder;

the cylinder comprises a plurality of first cooling fins positioned outside the cylinder, and the first air flow driven by the rotation of the first fan is blown to the plurality of first cooling fins through the plurality of ventilation openings; the projection of the first cooling fin projected to the top wall top surface along a first direction at least partially falls into the corresponding ventilation opening, and the first direction is vertical to the top wall top surface; the lower end of the first radiating fin faces to the corresponding ventilation opening;

the top wall is provided with annular ribs which separate the through openings from the ventilation openings, and the annular ribs surround the through openings; the top wall further comprises a plurality of outer walls, the vent holes are formed between the outer walls and the annular ribs at intervals, the first cooling fins are partially overlapped with the corresponding outer walls in the first direction, and the lower ends of the first cooling fins are attached to the upper ends of the corresponding outer walls;

the first cooling fins protrude outwards along the radial direction of the cylinder, and the first cooling fins radially extend outwards beyond the corresponding ventilation openings;

the cylinder is provided with a first side and a second side which are opposite, the second side of the cylinder is positioned between the motor and the first side of the cylinder, the first cooling fins comprise first side cooling fins positioned on the first side of the cylinder and second side cooling fins positioned on the second side of the cylinder, the ventilation openings comprise first side ventilation openings and second side ventilation openings positioned on two sides which are opposite to the through opening, part of the first air flow is blown to the first side cooling fins through the first side ventilation openings, and the other part of the first air flow is blown to the second side cooling fins through the second side ventilation openings; the second fan and the crankcase are positioned on two opposite sides of the motor, the second fan is positioned outside the motor, third airflow driven by the second fan when the second fan rotates is blown into the motor, and fourth airflow driven by the second fan when the second fan rotates can be directly blown to the second side radiating fins without being blocked;

the crank is including the transmission shaft of eccentric settings, the motor passes through transmission shaft, the motion of first bearing drive connecting rod, first fan off-centre is fixed in the transmission shaft, the transmission shaft includes the first axial region and the second axial region of coaxial setting, connects the toper connecting portion between first axial region and second axial region, the inner circle of first axial region and first bearing is fixed mutually, second axial region is fixed mutually with first fan, the parallel but non-coaxial setting of second axial region and motor shaft, the radial dimension of first axial region is greater than the radial dimension of second axial region, and the second axial region is connected to the one end that radial dimension is great relatively in the opposite both ends of toper connecting portion, the one end that radial dimension is less relatively connected first axial region, radial dimension is second axial region, toper connecting portion interval between first bearing and first fan.

2. The air compressor pump of claim 1, wherein: the connecting rod penetrates through the through opening.

3. The air compressor pump of claim 1, wherein: still include the cylinder cap, the valve plate is located between cylinder cap and the cylinder.

4. The air compressor pump of claim 1, wherein: the annular rib is annular, and the roof is equipped with the interval rib that separates adjacent vent, and each interval rib is respectively from annular rib radial outside extension.

5. The air compressor pump of claim 1, wherein: the interval between adjacent first radiating fins forms a first interval groove, the first interval groove is communicated with the corresponding vent, and at least part of first airflow blows into the first interval groove.

6. The air compressor pump of claim 1, wherein: the cylinder is externally provided with a first spacing groove between the adjacent first cooling fins, and the projection of the first spacing groove projected to the top surface of the top wall along the first direction at least partially falls into the corresponding ventilation opening.

7. The air compressor pump of claim 1, wherein: the top surface of the top wall is parallel to the rotating shaft of the motor.

8. The air compressor pump of claim 1, wherein: the first radiating fins are radially distributed on the periphery of the cylinder.

9. The air compressor pump of claim 1, wherein: the cylinder is provided with a third side and a fourth side which are opposite, the first side, the second side, the third side and the fourth side of the cylinder surround the periphery of the connecting rod together, the first cooling fins further comprise a third side cooling fin positioned on the third side of the cylinder and a fourth side cooling fin positioned on the fourth side of the cylinder, the ventilation openings further comprise a third side ventilation opening and a fourth side ventilation opening positioned on two opposite sides of the through opening, part of the first air flow is blown to the third side cooling fin through the third side ventilation opening, and part of the first air flow is blown to the fourth side cooling fin through the fourth side ventilation opening.

10. The air compressor pump of claim 1, wherein: still include the cylinder cap, the valve plate is located between cylinder cap and the cylinder, cylinder cap, valve plate, cylinder, crankcase are in proper order stacked together and are fixed mutually, the cylinder cap is equipped with a plurality of second fin.

11. The air compressor pump of claim 1, wherein: the transmission shaft and the motor rotating shaft are arranged in parallel but not coaxially.

12. The air compressor pump of claim 1, wherein: the central axis of the motor rotating shaft passes through the positive center of the first fan.

13. The air compressor pump of claim 1, wherein: still including being fixed in the baffle of crankcase, the baffle is located the opposite both sides of crankcase with the motor, first fan is located between baffle and the crank, a plurality of first ventilation holes have been seted up to the baffle, first ventilation hole intercommunication crankcase is inside and the crankcase outside.

14. The air compressor pump of claim 13, wherein: the baffle includes the medial surface that faces first fan, dispose ventilative amortization layer on the baffle medial surface.

15. An air compressor characterized in that: the air compressor comprises an air compressor pump according to any one of claims 1 to 14, an air storage tank and an air conveying pipe communicated between the air compressor pump and the air storage tank.