CN208431131U - A kind of electric air pump - Google Patents

Abstract

The utility model discloses a kind of electric air pumps, belong to air charging system technical field.It includes cylinder body, piston, connecting rod, reciprocating linear motion conversion mechanism and driving motor, piston is located at cylinder interior, cylinder body is provided with exhaust outlet far from one end of piston, one end of connecting rod and piston are an integral structure, exhaust ports are equipped with one-way exhaust valve, piston includes piston only and rear cover, piston only opens up fluted close to one end of exhaust outlet, groove is matched with the outer diameter of rear cover, rear cover and piston only offer through-hole one and through-hole two along the central axial direction of piston respectively, breather cheek valve is installed in through-hole two, the central axis of piston and the centerline axis parallel of connecting rod, the other end of connecting rod, reciprocating linear motion conversion mechanism and driving motor are sequentially connected.The present apparatus solves the problems, such as that existing electric air pump causes gas leakage since piston and cylinder cannot fit closely in intake process, has the advantages that low energy consumption, intake efficiency is high, long service life.

Description

A kind of electric air pump

Technical field

The utility model belongs to air charging system technical field, is related to a kind of electric air pump.

Background technique

Hand electric air pump is a kind of by motor drive, completes some inflation work, such as to balloon, basketball, Swim ring, automobile tire etc. need the everyday tools of charge operation.Compared with previous hand-operated tools, hand electric air pump Occur greatly facilitating the daily inflation work requirements of worker or user.

Existing air pump specifically includes that the pump housing and cylinder, is equipped with connecting rod, cylinder body, piston, air inlet and outlet in cylinder Mouthful.Cylinder is arranged in the pump housing, and the connecting rod in cylinder drives the reciprocating motion of the pistons in cylinder under external force, and piston is past During multiple movement, external gas enters cylinder interior from air inlet, and the gas being absorbed into is made in piston and cylinder It is compressed with lower, and is discharged by gas outlet in air charging system.

And there are following two aspect is insufficient for existing electric air pump structure: first is that external gas enter in cylinder process by It cannot be fitted closely in piston and cylinder and cause gas leakage, after being especially used for a long time, piston easily deforms with cylinder, piston Gap is therefore generated with cylinder and causes gas leakage in intake process, this more easily leads to the low problem of intake efficiency；Second is that driving piston Connecting rod mostly be with piston as one, in reciprocating motion of the pistons, connecting rod is constantly swung within the scope of certain angle, i.e. connecting rod Central axis and piston central axis between there are angles, and the angle of this angle constantly changes, thus It is also continually changing for leading to act on the direction of the power on piston, thus piston generates biggish lateral pressure to cylinder inner wall, This lateral pressure easily causes cylinder and piston to deform, and this aspect shortens the service life of cylinder and piston, is on the other hand also easy Gas leakage is caused, the exhaust efficiency of air pump is reduced；In addition, the frictional force during this between piston and cylinder is also larger, because And energy consumption is larger during reciprocating motion of the pistons.

Chinese utility model, notification number: date of publication: CN201218176Y on April 8th, 2009, discloses one kind and inflates Pump, it includes air outlet valve, cylinder, piston, connecting rod, cam, main shaft, and the top of cylinder, piston sliding setting is arranged in air outlet valve In the inside of cylinder, cam is socketed on main shaft, and offset distance is equipped between the axle center of main shaft and the axle center of cylinder, and the top of connecting rod is solid Surely it is connected on the bottom of piston, the bottom stretches out cylinder of connecting rod is connect with cam.The utility model utilizes main shaft and cylinder Axle center offset distance makes the fit angle between piston and cylinder change and form gap, and then from cylinder bottom natural inflow, But its there are the deficiencies in terms of following two: (1) cam rotate when, drive pillar eccentric rotary, in turn result in connecting rod application The direction of power on piston constantly changes, thus piston can generate biggish lateral pressure and frictional force to cylinder, and then cause The energy consumption of air pump increases, the lost of life, when being an integral structure in particular by connecting rod and piston, is easier to generate cylinder larger Lateral pressure and frictional force, and then the energy consumption of air pump is caused to increase, when connecting rod swing amplitude is excessive, also easily causes connecting rod cracking； (2) device changes to form gap using the fit angle between piston and cylinder, and then from cylinder bottom air inlet, but It is the presence of gas leakage, this has both sides reason, first is that piston into cylinder moving motion process, is filled between cylinder still There may be gaps, cause gas leakage, thus intake efficiency is low, second is that the fit angle between piston and cylinder, thus piston with Active force between cylinder changes frequent occurrence, this can piston deform with cylinder, the especially inner wall of cylinder and piston Edge is more easily-deformable, thus there are gaps between piston and cylinder after being used for a long time.

Chinese invention patent, notification number: CN102937077B, the day for announcing: on August 12nd, 2015 discloses a kind of air pump, It includes piston cylinder and the piston that is arranged in inside the piston cylinder；It further include intake valve and air outlet valve；The intake valve and institute Air outlet valve is stated to be connected to the same end of the piston cylinder；The intake valve includes the first valve chamber interconnected, the first air inlet Pipe and the first escape pipe；The both ends of first valve chamber have been respectively communicated with the first air inlet pipe and the first escape pipe；Described first goes out Tracheae is connected to the piston cylinder, and first air inlet pipe is communicated with the atmosphere；It is equipped in first valve chamber remote in the piston It can be in the first air inlet pipe first described in the promotion lower edge of gas when the one end being connected to the intake valve from the piston cylinder The axial movement of valve chamber, until the air inlet spool that first valve chamber, the first air inlet pipe are connected to the first escape pipe.The air pump energy It is enough to realize the function of carrying out positive pressure inflation and negative inspiratory pressure, it is easy to use.The disadvantages are as follows: one end of (1) the device connecting rod With piston using rotation pin connection, so the movement of connecting rod is essentially plane motion, one end that connecting rod is connect with piston Do linear reciprocating motion together along with piston, the other end of connecting rod moves in a circle under the drive of the motor, this structure and The direction that motion mode results in the power that connecting rod is applied on piston constantly changes, thus piston generates biggish side pressure to cylinder Power and frictional force, and then the energy consumption of air pump is caused to increase, the lost of life, and during reciprocating motion of the pistons, due to connecting rod The direction for the power being applied on piston constantly changes, and is easy to produce the problem of piston and cylinder cannot fit closely；(2) it rotates The wear damage of pin is very fast, and the replacement of rotational pin, attended operation are cumbersome.

Summary of the invention

1, it to solve the problems, such as

Asking for gas leakage is caused since piston cannot be fitted closely with cylinder in intake process for existing electric air pump Topic, the utility model provide a kind of electric air pump.Through-hole is arranged in it on piston, and breather cheek valve is installed in through-hole, and And connecting rod is not swung, for piston in reciprocatory movement, the direction for the power that connecting rod acts on piston is parallel to work always The central axis of plug, the central axis of piston are also parallel to the central axis of cylinder body always, are acted on so as to avoid due to connecting rod The problem of the direction of the power on piston changes and causes piston and cylinder that cannot fit closely, thus in intake process not Gas leakage can occur, the efficiency of air inlet is higher.

2, technical solution

To solve the above problems, the utility model adopts the following technical scheme.

A kind of electric air pump, including cylinder body, piston, connecting rod, reciprocating linear motion conversion mechanism and driving motor, the work Plug is located at the cylinder interior, and the cylinder body is provided with exhaust outlet, one end of the connecting rod and institute far from one end of the piston It states piston to be an integral structure, the exhaust ports are equipped with one-way exhaust valve, and the piston includes piston only and rear cover, institute It states piston only and is opened up close to one end of the exhaust outlet fluted, the groove is matched with the outer diameter of the rear cover, described Rear cover and the piston only offer through-hole one and through-hole two, the through-hole along the central axial direction of the piston respectively Breather cheek valve is installed, the central axis of the central axis of the piston and the connecting rod is parallel to each other, the connecting rod in two The other end, the reciprocating linear motion conversion mechanism and the driving motor be sequentially connected, the driving motor passes through described Reciprocating linear motion conversion mechanism drives the connecting rod that the piston is driven to move back and forth in the cylinder body.

Further, the breather cheek valve includes blocking first and elastic element one, one end of the elastic element one With it is described blocking it is first be fixedly connected, the other end of the elastic element one is fixedly connected with the rear cover, it is described block it is first The through-hole two is blocked under the elastic force effect of the elastic element one from inside to outside.

Further, the connecting rod is provided with through-hole along central axial direction, the central axis of the piston and described The central axis of connecting rod is located along the same line.

Further, the reciprocating linear motion conversion mechanism includes interconnecting piece, cam pin and rotating disc, the connecting rod The other end is provided with the interconnecting piece, and the cam pin is provided on the rotating disc, is provided with length on the interconnecting piece Strip-shaped hole, the cam pin are located in the elongate holes, and the cam pin is in the elongate holes along perpendicular to described The length that motion profile when length of connecting rod direction is mobile is formed by straight line is equal to the cam pin as the rotating disc turns Motion profile when dynamic is formed by the length of diameter of a circle, and the rotating disc is connect with the driving motor.

Further, the cam pin is cylindrical type, and the elongate holes are along on the length of connecting rod direction Chamber size is matched with the diameter of the cylindrical type cam pin.

Further, the periphery of the rotating disc is provided with teeth, and transmission is provided on the output shaft of the driving motor Gear, teeth and the transmission gear on the rotating disc are intermeshed.

Further, the reciprocating linear motion conversion mechanism further includes the driven tooth of setting coaxial with the rotating disc It takes turns, transmission gear is provided on the output shaft of the driving motor, the driven gear and the transmission gear are intermeshed.

Further, the reciprocating linear motion conversion mechanism includes rotational sleeve, spiral groove, hemispherical groove and steel Pearl, the outer diameter of the connecting rod are matched with the internal diameter of the rotational sleeve, and spiral groove, institute are offered on the periphery of the connecting rod State and offer hemispherical groove on the inner wall of rotational sleeve, the steel ball be located at the spiral groove and the spherical groove it Between, the one end of the rotational sleeve far from the connecting rod is connect with the driving motor.

It further, further include shell and exhaust passage, the cylinder body, the connecting rod, linear reciprocating motion conversion Mechanism and the driving motor are respectively positioned in the shell, and one end of the shell offers hole, and the exhaust outlet passes through institute Exhaust passage is stated to be connected to the hole.

Further, it is provided with annular groove on the outer wall of the piston, sealing ring is installed in the annular groove.

3, beneficial effect

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

(1) electric air pump provided by the utility model, when piston is moved to exhaust outlet direction, piston compressing cylinder is intracorporal Air is simultaneously discharged by one-way exhaust valve, and air enters object to be inflatable body；When piston is transported away from the direction of exhaust outlet When dynamic, one-way exhaust valve is closed, breather cheek valve is opened, and under the suction function formed in cylinder body, extraneous air is by piston Breather cheek valve on through-hole enters cylinder interior；

(2) electric air pump provided by the utility model, when piston towards exhaust outlet move when, the intracorporal air pressure of cylinder compared with Greatly, compressed air, which acts on, blocks pressure direction on first from inside to outside, thus blocks first empty in elastic force and cylinder body It is tightly attached under the action of atmospheric pressure on the inner wall of through-hole two, gas is prevented to be discharged by through-hole two；When piston is away from exhaust When one end motion of mouth, the pressure of cylinder interior is gradually reduced, after forming negative pressure, to blocking capitiform at the attraction of ecto-entad Power blocks first between the inner wall of through-hole two when the attraction acts on blocking first upper elastic force greater than elastic element one Gap is formed, outside air passes through the gap under the action of negative pressure and enters cylinder interior；

(3) electric air pump provided by the utility model, in gas replenishment process, connecting rod will not be swung, the drive of driving motor After power is converted by reciprocating linear motion conversion mechanism, the direction of the power acted on piston is parallel to the center of piston always Axis, for piston in reciprocatory movement, the central axis of piston is parallel to the central axis of cylinder body always, so as to avoid by It changes in the direction for the power that connecting rod acts on piston and piston is caused to generate biggish lateral pressure and frictional force to cylinder body The problem of；

(4) electric air pump provided by the utility model, cam pin carry out circular motion with turn disc, on connecting rod The interconnecting piece with elongate holes being arranged is matched with cam pin, which is decomposed into along elongate holes length side Upward straight line componental movement and along the reciprocal componental movement on length of connecting rod direction, since elongate holes are perpendicular to length of connecting rod side It is equal that upward interior chamber size with cam pin circular motion track is formed by diameter of a circle, thus the structure is during the motion Not will cause connecting rod swing, thus can guarantee the direction of the power that cam pin is applied on connecting rod always with the central axis of cylinder body Line, the central axis of piston, the central axis of connecting rod are parallel always；

(5) electric air pump provided by the utility model, elongate holes are along the interior chamber size and circle on length of connecting rod direction The structure that the diameter of column type cam pin matches can guarantee that reciprocating motion of the pistons is synchronous with the rotation of cam pin, i.e., will not send out The phenomenon that raw cam pin rotation and piston are failure to actuate；

(6) electric air pump provided by the utility model is directly uploaded in the setting of rotating disc periphery with driving motor output shaft The rotation of the intermeshing teeth of moving gear, transmission gear drives turn disc, so that cam pin is driven to move in a circle, this Kind structure is directly driven using existing rotating disc, and the structure member of transmission device is reduced；

(7) rotation of electric air pump provided by the utility model, driving motor output shaft upper transfer gear drives driven tooth Wheel rotation, to drive the turn disc coaxial with driven gear, and then makes cam pin move in a circle, and this structure can be with Different transmission gear and driven gear is selected to match with flexibly adjustment transmission ratio；

(8) electric air pump provided by the utility model, driving motor drives in rotational sleeve rotation process, in rotational sleeve The spherical steel ball of wall upper half inside of spherical groove rolls in spiral type groove, and connecting rod is in rotational sleeve along rotational sleeve center Axis direction carries out stretching motion, and then realizes piston in the intracorporal linear reciprocating motion of cylinder, and rotational sleeve is logical during this Cross the direction of power that rotation is applied on connecting rod always with the central axis of cylinder body, the central axis of piston, connecting rod central axis Line is parallel always；

(9) electric air pump provided by the utility model inside the shell by the setting of each component is conveniently operated with, is improved Safety and portability；

(10) electric air pump provided by the utility model is increased by installing sealing ring on the annular groove of piston Leakproofness between piston and cylinder body, reduces air inlet energy consumption, and the exhaust efficiency of piston and cylinder body also improves 20% or more, tool There is good application prospect.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of electric air pump ontology；

Fig. 2 is the schematic perspective view of parallel rod-type reciprocating linear motion conversion mechanism；

Fig. 3 is the schematic perspective view of spiral steel ball rollaway type reciprocating linear motion conversion mechanism；

Fig. 4 is the enlarged diagram of piston structure；

Fig. 5 and Fig. 6 is the setting position view of guide groove.

In figure: 1, cylinder body；2, piston；3, connecting rod；4, interconnecting piece；5, cam pin；6, rotating disc；7, exhaust outlet；8, it blocks First two；9, elastic element two；10, sealing ring；11, rotational sleeve；12, spiral groove；13, hemispherical groove；14, annular is recessed Slot；15, rear cover；16, shell；17, guide groove.

Specific embodiment

The utility model is further described below in the following with reference to the drawings and specific embodiments.

Embodiment 1

As shown in Figure 2, Figure 3 and Figure 4, a kind of electric air pump, including cylinder body 1, piston 2, connecting rod 3, linear reciprocating motion turn It changes planes structure and driving motor, the piston 2 is located inside the cylinder body 1, and the cylinder body 1 is arranged far from one end of the piston 2 There is exhaust outlet 7, one end of the connecting rod 3 and the piston 2 are an integral structure, and are equipped with one-way exhaust at the exhaust outlet 7 Valve, the piston 2 include piston only and rear cover 15, the piston only opened up close to one end of the exhaust outlet 7 it is fluted, The groove is matched with the outer diameter of the rear cover 15, the rear cover 15 and the piston only along the piston 2 center Axis direction offers through-hole one and through-hole two respectively, is equipped with breather cheek valve in the through-hole two, in the piston 2 The central axis of mandrel line and the connecting rod 3 is parallel to each other, the other end of the connecting rod 3, the linear reciprocating motion interpreter Structure and the driving motor are sequentially connected, and the driving motor drives the connecting rod by the reciprocating linear motion conversion mechanism 3 drive the piston 2 to move back and forth in the cylinder body 1.

The present apparatus course of work is as follows: the driving motor drives the company by the reciprocating linear motion conversion mechanism When bar 3 drives the piston 2 far from exhaust outlet 7, negative pressure is formed in cylinder body 1, air enters the cylinder body 1 from breather cheek valve It is interior；The driving motor drives the connecting rod 3 to drive the piston 2 to exhaust outlet by the reciprocating linear motion conversion mechanism When 7 movement, the air in the cylinder body 1 is compressed to and is passed through the discharge of the one-way exhaust valve on exhaust outlet 7, is looped back and forth like this, The inflation to balloon, basketball, swim ring, tire etc. may be implemented, the center line of piston 2 is parallel always in reciprocatory movement In the center line of the cylinder body.

Since the connecting rod 3 in the present apparatus will not be swung, the driving force of driving motor is converted by linear reciprocating motion After mechanism conversion, the direction for acting on power on the piston 2 is parallel to the central axis of piston 2 always, it is ensured that piston 2 is back and forth being transported During dynamic, the central axis of piston 2 is parallel to the central axis of cylinder body 1 always, acts on work so as to avoid due to connecting rod 3 The direction of power on plug 2 changes and piston 3 is caused to generate biggish lateral pressure and frictional force to cylinder body 1, in turn results in The problem of air pump energy consumption increases, the lost of life also ensures that tight fit is not in gap and leads between piston 2 and cylinder body 1 Cause gas leakage.Piston 2 and connecting rod 3 in the present embodiment can be linked together by the way of assembling, for example, by using bolt and nut Deng the mode for being fixedly connected with the piston 2 of separate structure with connecting rod 3, it is also possible to be integrally machined molding structure, so that Connecting rod 3 cannot be rotated or be swung relative to piston 2, and piston 2 and connecting rod 3 are integrated the structure of machine-shaping in the present embodiment.

Embodiment 2

As shown in figure 4, a kind of electric air pump, structure compared with Example 1, except that: the breather cheek valve Including blocking first and elastic element one, one end of the elastic element one with it is described block it is first be fixedly connected, the elasticity The other end of element one is fixedly connected with the rear cover 15, the first elastic force in the elastic element one from inside to outside of blocking The through-hole two is blocked under effect, block in this way it is first elastic element one from inside to outside (relative to cylinder body 1 position and Speech) resilient force under the clogging through-hole two blocked first with two inner wall of through-hole to reach good blocking effect The position of contact has round and smooth cambered surface, and the inner wall of through-hole two also has corresponding round and smooth cambered surface, and the size of through-hole two is slightly larger than The outer diameter of first round and smooth cambered surface is blocked, to guarantee that the two can fit closely.

The breather cheek valve course of work in the present embodiment is as follows: when piston 2 is moved towards exhaust outlet 7 in cylinder body 1 When air carries out compression discharge, compressed air acts on the pressure direction (position relative to cylinder body 1 from inside to outside blocked on first For setting), thus block it is first be tightly attached on the inner wall of through-hole two under the action of air pressure in elastic force and cylinder body 1, prevent Only gas is discharged by through-hole two；When an end motion of the piston 2 away from exhaust outlet, the pressure inside cylinder body 1 gradually subtracts Small, after forming negative pressure, to blocking capitiform at the attraction of ecto-entad (for the position relative to cylinder body 1), the attraction is big When elastic element one acts on and blocks first upper elastic force, blocking is first to form gap, the external world between the inner wall of through-hole two Air passes through the gap under the action of negative pressure and enters inside cylinder body 1.

Embodiment 3

As shown in figure 4, a kind of electric air pump, structure compared with Example 1, except that: the connecting rod 3 is in Heart axis direction is provided with through-hole, and the central axis of the piston 2 and the central axis of the connecting rod 3 are located along the same line, The structure communicated is made in connecting rod 3 and piston 2 in the present embodiment, i.e., the through-hole on through-hole one, through-hole two and connecting rod 3 forms perforation Bleed-off passage, when driving motor drives the connecting rod 3 to drive the piston 2 by the reciprocating linear motion conversion mechanism When far from exhaust outlet 7, negative pressure is formed in cylinder body 1, breather cheek valve is opened, extraneous air along pumping by by unidirectionally into Air valve enters in the cylinder body 1.

Embodiment 4

As shown in Fig. 2, a kind of electric air pump, structure compared with Example 1, except that: the reciprocating linear fortune Manual converting mechanism includes interconnecting piece 4, cam pin 5 and rotating disc 6, and the other end of the connecting rod 3 is provided with the interconnecting piece 4, It is provided with the cam pin 5 on the rotating disc 6, is provided with elongate holes on the interconnecting piece 4, the cam pin 5 is located at In the elongate holes, the cam pin 5 is in the elongate holes along when moving perpendicular to 3 length direction of connecting rod The length that motion profile is formed by straight line is equal to the cam pin 5 with the motion profile institute shape when rotating disc 6 rotates At diameter of a circle length, the rotating disc 6 connect with the driving motor.

Rotating disc 6 in the present embodiment is disc, and cam pin 5 is arranged in the eccentric point of rotating disc 6, and driving motor drives When turn Moving plate 6 rotates, cam pin 5 carries out circular motion, passes through having of being arranged on cam pin 5 and connecting rod 3 during this The cooperation of the interconnecting piece 4 and cam pin 5 of elongate holes, which is decomposed into along straight on elongate holes length direction Line componental movement and along the reciprocal componental movement on 3 length direction of connecting rod, since elongate holes are perpendicular on 3 length direction of connecting rod It is equal that interior chamber size with 5 circular motion track of cam pin is formed by diameter of a circle, thus along on elongate holes length direction Straight line componental movement not will cause connecting rod 3 swing, and by along on 3 length direction of connecting rod reciprocal componental movement act on connecting rod 3 On power direction it is constant always, therefore the reciprocating linear motion conversion mechanism in the present embodiment can guarantee cam pin 5 apply Central axis of the direction of power on connecting rod 3 always with the central axis of cylinder body 1, the central axis of piston 2, connecting rod 3 begins It is parallel eventually.

As shown in figure 5, guiding device can be arranged to protect in the outside of cylinder body 1 to further avoid connecting rod 3 from swinging Connecting rod 3 is demonstrate,proved during linear reciprocating motion, will not be swung, for example, guide groove is arranged in the outside of cylinder body 1 in the present embodiment 17, connecting rod 3 passes through guide groove 17, so that connecting rod 3 can only do linear reciprocating motion in guide groove 17, without putting It is dynamic.

Embodiment 5

As shown in Fig. 2, a kind of electric air pump, structure compared with Example 4, except that: the cam pin 5 is circle Column type, and the elongate holes are along the diameter of interior chamber size and the cylindrical type cam pin 5 on 3 length direction of connecting rod It matches, i.e., the diameter of the described cam pin 5 and the width of the elongate holes are fitted close, and elongate holes are along 3 length of connecting rod The structure that interior chamber size on direction is matched with the diameter of cylindrical type cam pin 5 can guarantee that piston 2 moves back and forth and bias The rotation synchronization of pin 5, i.e., will not rotate there is a phenomenon where cam pin 5 and piston 2 is failure to actuate.

Embodiment 6

As shown in Fig. 2, a kind of electric air pump, structure compared with Example 4, except that: the rotating disc 6 it is outer It is provided with teeth week, transmission gear is provided on the output shaft of the driving motor, the teeth on the rotating disc 6 and the biography Moving gear intermeshing, directly 6 periphery of rotating disc setting with the intermeshing teeth of driving motor output shaft upper transfer gear, The rotation of transmission gear drives rotating disc 6 to rotate, so that cam pin 5 be driven to move in a circle, this structure directly utilizes existing Rotating disc 6 be driven, reduce the structure member of transmission device.

Embodiment 7

As shown in Fig. 2, a kind of electric air pump, structure compared with Example 4, except that: the reciprocating linear fortune Manual converting mechanism further includes the driven gear of setting coaxial with the rotating disc 6, is provided on the output shaft of the driving motor Transmission gear, the driven gear and the transmission gear are intermeshed, the rotation band of driving motor output shaft upper transfer gear Dynamic driven gear rotation, so that the rotating disc 6 coaxial with driven gear be driven to rotate, and then makes cam pin 5 move in a circle, this Kind structure can choose different transmission gear and driven gear and match with flexibly adjustment transmission ratio.

Embodiment 8

As shown in figure 3, a kind of electric air pump, structure compared with Example 1, except that: the reciprocating linear fortune Manual converting mechanism includes rotational sleeve 11, spiral groove 12, hemispherical groove 13 and steel ball, the outer diameter of the connecting rod 3 with it is described The internal diameter of rotational sleeve 11 matches, and spiral groove 12, the inner wall of the rotational sleeve 11 are offered on the periphery of the connecting rod 3 On offer hemispherical groove 13, the steel ball is between the spiral groove 12 and the spherical groove 13, the rotation Sleeve 11 is connect far from one end of the connecting rod 3 with the driving motor.

In the present embodiment, the connection type of the rotational sleeve 11 one end far from the connecting rod 3 and the driving motor Planetary gear train drive mechanism commonly used in the prior art can be used, it may be assumed that rotational sleeve 11 is installed far from one end of the connecting rod 3 There is planet carrier, teeth are provided on planet carrier inner wall, central gear, central gear and row are provided on the output shaft of driving motor Planetary gear is provided between carrier teeth, planet carrier teeth and planetary gear are intermeshed, central gear and planetary gear phase Mutually engagement.This kind of drive have compact-sized, small in size, large carrying capacity, transmitting power bracket and gear range it is big, The advantages that running noises are small, the high-efficient and service life is long.

Driving motor drives in 11 rotation process of rotational sleeve, the spherical steel of 11 inner wall upper half inside of spherical groove of rotational sleeve Pearl rolls in spiral type groove 12, and connecting rod 3 stretches in rotational sleeve 11 along 11 central axial direction of rotational sleeve Movement, and then realize linear reciprocating motion of the piston 2 in cylinder body 1, rotational sleeve 11 is applied on connecting rod 3 during this The direction of power and connecting rod 3 apply the direction of the power on the piston 2 central axis with the central axis of cylinder body 1, piston 2 always Line, the central axis of connecting rod 3 are parallel always, thus equally can be to avoid the direction of the power due to the effect of connecting rod 3 on the piston 2 It changes and piston 3 is caused to generate biggish lateral pressure and frictional force to cylinder body 1, the air pump energy consumption in turn resulted in increases, the longevity The problem of life shortens also ensures that tight fit is not in gap and leads to gas leakage between piston 2 and cylinder body 1.

As shown in fig. 6, guiding device can be arranged to protect in the outside of cylinder body 1 to further avoid connecting rod 3 from swinging Connecting rod 3 is demonstrate,proved during linear reciprocating motion, will not be swung, for example, guide groove is arranged in the outside of cylinder body 1 in the present embodiment 17, connecting rod 3 passes through guide groove 17, so that connecting rod 3 can only do linear reciprocating motion in guide groove 17, without putting It is dynamic.

Embodiment 9

As shown in Figure 1, Figure 2 and Figure 3, a kind of electric air pump, structure compared with Example 1, except that: further include Shell 16 and exhaust passage, the cylinder body 1, the connecting rod 3, the reciprocating linear motion conversion mechanism and the driving motor are equal In the shell 16, and one end of the shell 16 offers hole, the exhaust outlet 7 by the exhaust passage with it is described Hole connection, each component is arranged in shell 16, conveniently operates with, improves safety and portability.

Embodiment 10

As shown in figure 4, a kind of hand electric air pump, structure compared with Example 1, except that: the piston 2 Outer wall on be provided with annular groove 14, sealing ring 10 is installed in the annular groove 14, passes through the annular groove in piston 2 Sealing ring 10 is installed on 14, the leakproofness between piston 2 and cylinder body 1 is increased, gas leakage can be prevented, reduce air inlet energy consumption, The exhaust efficiency of piston 2 and cylinder body 1 also improves 20% or more, has a good application prospect.

Claims (10)

1. a kind of electric air pump, including cylinder body (1), piston (2) and connecting rod (3), the piston (2) is located in the cylinder body (1) Portion, the cylinder body (1) are provided with exhaust outlet (7) far from the one end of the piston (2), it is characterised in that: the one of the connecting rod (3) End and the piston (2) are an integral structure, and one-way exhaust valve is equipped at the exhaust outlet (7), and the piston (2) includes living Plug body and rear cover (15), the piston only opened up close to one end of the exhaust outlet (7) it is fluted, the groove with it is described The outer diameter of rear cover (15) matches, the rear cover (15) and the piston only along the piston (2) central axial direction Offer through-hole one and through-hole two respectively, breather cheek valve be installed in the through-hole two, the central axis of the piston (2) and The central axis of the connecting rod (3) is parallel to each other, and the electric air pump further includes reciprocating linear motion conversion mechanism and driving electricity Machine, the other end, the reciprocating linear motion conversion mechanism and the driving motor of the connecting rod (3) are sequentially connected, the drive Dynamic motor drives the connecting rod (3) to drive the piston (2) in the cylinder body (1) by the reciprocating linear motion conversion mechanism Interior reciprocating motion.

2. electric air pump according to claim 1, it is characterised in that: the breather cheek valve includes that blocking is first and elastic Element one, one end of the elastic element one with it is described blocking it is first be fixedly connected, the other end of the elastic element one and institute Rear cover (15) is stated to be fixedly connected, the blocking is first blocked under the elastic element one elastic force effect from inside to outside it is described Through-hole two.

3. electric air pump according to claim 1, it is characterised in that: the connecting rod (3) is arranged along central axial direction There is through-hole, the central axis of the piston (2) and the central axis of the connecting rod (3) are located along the same line.

4. electric air pump according to claim 1, it is characterised in that: the reciprocating linear motion conversion mechanism includes connection Portion (4), cam pin (5) and rotating disc (6), the other end of the connecting rod (3) are provided with the interconnecting piece (4), the rotation It is provided with the cam pin (5) on disk (6), is provided with elongate holes on the interconnecting piece (4), the cam pin (5) is located at In the elongate holes, the cam pin (5) is in the elongate holes along mobile perpendicular to the connecting rod (3) length direction When motion profile be formed by straight line length be equal to the cam pin (5) with the rotating disc (6) rotate when movement Track is formed by the length of diameter of a circle, and the rotating disc (6) connect with the driving motor.

5. electric air pump according to claim 4, it is characterised in that: the cam pin (5) is cylindrical type, and the strip Shape hole is matched along the interior chamber size on the connecting rod (3) length direction with the diameter of the cylindrical type cam pin (5).

6. electric air pump according to claim 4, it is characterised in that: the periphery of the rotating disc (6) is provided with teeth, institute It states and is provided with transmission gear on the output shaft of driving motor, the teeth on the rotating disc (6) are mutually nibbled with the transmission gear It closes.

7. electric air pump according to claim 4, it is characterised in that: the reciprocating linear motion conversion mechanism further include with The driven gear of the coaxial setting of the rotating disc (6) is provided with transmission gear on the output shaft of the driving motor, described driven Gear and the transmission gear are intermeshed.

8. electric air pump according to claim 1, it is characterised in that: the reciprocating linear motion conversion mechanism includes rotation Sleeve (11), spiral groove (12), hemispherical groove (13) and steel ball, the outer diameter and the rotational sleeve of the connecting rod (3) (11) internal diameter matches, and offers spiral groove (12) on the periphery of the connecting rod (3), the inner wall of the rotational sleeve (11) On offer hemispherical groove (13), the steel ball is between the spiral groove (12) and the spherical groove (13), institute Rotational sleeve (11) are stated to connect far from the one end of the connecting rod (3) with the driving motor.

9. electric air pump according to claim 1, it is characterised in that: further include shell (16) and exhaust passage, the cylinder Body (1), the connecting rod (3), the reciprocating linear motion conversion mechanism and the driving motor are respectively positioned in the shell (16), And one end of the shell (16) offers hole, the exhaust outlet (7) is connected to by the exhaust passage with the hole.

10. electric air pump as claimed in any of claims 1 to 9, it is characterised in that: the outer wall of the piston (2) On be provided with annular groove (14), sealing ring (10) are installed in the annular groove (14).