CN208619280U - A kind of steel ball rollaway type transmission device and electric air pump - Google Patents

Abstract

The utility model discloses a kind of steel ball rollaway type transmission device and electric air pumps, belong to air charging system technical field.It includes piston, connecting rod and rotational sleeve and steel ball, one end of connecting rod and piston are an integral structure, the central axis of piston and the central axis of connecting rod are parallel to each other, connecting rod is located in rotational sleeve, raceway groove is offered on the periphery of connecting rod, the oval periphery for being looped around connecting rod of raceway groove, hemispherical groove is offered on the inner wall of rotational sleeve, steel ball is between raceway groove and spherical groove, rotational sleeve is connect far from one end of connecting rod with driving motor, driving motor is moved back and forth in cylinder body by steel ball rollaway type transmission device drive link band piston, the direction for the power that connecting rod acts on piston is parallel to the central axis of piston always, to solve the problems, such as that the central axis of piston and the central axis of cylinder body are not parallel in reciprocatory movement.The utility model has the advantages that low energy consumption, exhaust efficiency is high, long service life.

Description

A kind of steel ball rollaway type transmission device and electric air pump

Technical field

The utility model belongs to air charging system technical field, is related to a kind of steel ball rollaway type transmission device and 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 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；(2) wear damage of rotational pin is very fast, and rotational pin Replacement, attended operation it is cumbersome.

Chinese invention patent, publication No.: date of publication: CN103195683A on July 10th, 2013, discloses a kind of inflation Pump connector and inflator pump, inflator pump connector includes the first connecting plate and the second connecting plate, the bottom end of the first connecting plate and the The top of two connecting plates links together；First connecting plate is equipped with compression cylinder mounting hole, and the second connecting plate is filled equipped with power Mounting hole is set, compression cylinder mounting hole and power device mounting hole are through-hole.Inflator pump includes power device and transmission device, power Device and transmission device are linked together by above-mentioned inflator pump connector, and the power device includes motor, the motor First transmission gear is installed on output shaft；The transmission device includes connecting shaft and connecting rod piston, and the connecting shaft is fixed on In the eccentric point of first transmission gear, one end of the connecting rod piston is sleeved in connecting shaft, and the other end is equipped with piston ring；It is described Connecting rod piston is sleeved in compression cylinder, and the compression cylinder is sleeved in compression cylinder mounting hole, and the motor is fixed on the second connection On plate, and the output shaft of motor passes through in power mounting hole.This inflator pump has that structure is simple, is easy to cast, shape compared with It is small, weight is smaller, the beneficial effects such as cheap.But disadvantage is that: one end of connecting rod piston is sleeved on connecting shaft On, connecting shaft drives connecting rod piston to move back and forth during rotating with the first transmission gear, but this structure lower link There is also certain swings for piston, rather than do linear reciprocating motion, thus connecting shaft acts on the side of the power on connecting rod piston To be also it is continually changing, piston generates biggish lateral pressure and frictional force to compression cylinder, and then the energy consumption of inflator pump is caused to increase Add, the lost of life.

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 equally generate biggish lateral pressure and frictional force to cylinder, in turn The energy consumption of air pump is caused to increase, the lost of life when being an integral structure in particular by connecting rod and piston, is easier to generate cylinder Biggish lateral pressure and frictional force also easily cause connecting rod cracking when connecting rod swing amplitude is excessive；(2) between piston and cylinder The gap that fit angle changes and formed is easy air inlet, but can also there are problems that gas leakage in exhaust process, because And it is lower to treat the efficiency that inflatable objects are inflated.

Summary of the invention

1, it to solve the problems, such as

The electric air pump that connecting rod and piston for existing driving piston are an integral structure, in reciprocating motion of the pistons process In, the central axis of piston and the not parallel problem of the central axis of cylinder body, the utility model provide a kind of steel ball rollaway type and pass Dynamic device and electric air pump.Its connecting rod is not swung, and for piston in reciprocatory movement, connecting rod acts on the power on piston Direction be parallel to the central axis of piston always, the central axis of piston is also parallel to the central axis of cylinder body always, thus The direction for avoiding the power acted on piston due to connecting rod is changed and piston is caused to generate biggish lateral pressure to cylinder body And the problem of frictional force.

2, technical solution

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

A kind of steel ball rollaway type transmission device, including piston, connecting rod and rotational sleeve and steel ball, one end of the connecting rod and The piston is an integral structure, and the central axis of the central axis of the piston and the connecting rod is parallel to each other, the connecting rod In the rotational sleeve, raceway groove is offered on the periphery of the connecting rod, and the raceway groove is oval circular Hemispherical groove is offered on the periphery of the connecting rod, the inner wall of the rotational sleeve, it is recessed that the steel ball is located at the raceway Between slot and the spherical groove, the one end of the rotational sleeve far from the connecting rod is connect with the driving motor.

Further, the rotational sleeve is equipped with the driven tooth coaxial with the connecting rod far from one end of the piston 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 rotational sleeve is equipped with planet carrier, the inner wall of the planet carrier far from one end of the piston On be provided with teeth, central gear, and the planet carrier and the central gear are provided on the output shaft of the driving motor It is rotated around the same center of circle, planetary gear, the teeth of the planet carrier is provided between the central gear and the planet carrier It is intermeshed with the planetary gear, the central gear and the planetary gear are intermeshed.

Further, the piston offers through-hole along central axial direction, is equipped with one-way air inlet in the through-hole Valve.

Further, the piston includes piston only and rear cover, and the piston only is close to one end of the exhaust outlet Open up fluted, the groove is matched with the outer diameter of the rear cover, and the rear cover and the piston only are along the piston Central axial direction offer through-hole one and through-hole two respectively, the breather cheek valve is installed in the through-hole two.

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

A kind of electric air pump, including the steel ball rollaway type transmission device and cylinder body, the piston is located at the cylinder body Inside, the cylinder body are provided with exhaust outlet far from one end of the piston, and the exhaust ports are equipped with one-way exhaust valve, described Driving motor is by driving the connecting rod that the piston is driven to move back and forth in the cylinder body, described in reciprocatory movement The central axis of piston is parallel to the central axis of the cylinder body always.

Further, the one-way exhaust valve includes blocking head two and elastic element two, one end of the elastic element two It is fixedly connected with the blocking head two, the other end of the elastic element two is fixed on the outside of the exhaust outlet, the blocking First two block the exhaust outlet under the elastic force effect of two ecto-entad of elastic element.

It further, further include shell and exhaust passage, the cylinder body, the steel ball rollaway type transmission device and the drive Dynamic motor is respectively positioned in the shell, and one end of the shell offers hole, the exhaust outlet by the exhaust passage with The hole connection.

3, beneficial effect

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

(1) steel ball rollaway type transmission device provided by the utility model, driving motor drive in rotational sleeve rotation process, The spherical steel ball of rotational sleeve inner wall upper half inside of spherical groove rolls in raceway groove, and connecting rod is in rotational sleeve along rotation Bushing core axis direction carries out stretching motion, and then realizes piston in the intracorporal linear reciprocating motion of cylinder, this process transfer The direction of power that moving sleeve is applied on connecting rod by rotation always with the central axis of cylinder body, the central axis of piston, connecting rod Central axis it is parallel always；

(2) steel ball rollaway type transmission device provided by the utility model is intermeshed using driven gear and transmission gear Transmission is carried out to which drive link carries out stretching motion, this structure along rotational sleeve central axial direction in rotational sleeve It can choose different transmission gear and driven gear to match with flexibly adjustment transmission ratio；

(3) steel ball rollaway type transmission device provided by the utility model passes through planet carrier, central gear and planetary gear phase The planetary gear train kind of drive cooperatively formed has compact-sized, small in size, large carrying capacity, transmitting power bracket and transmission ratio The advantages that range is big, running noises are small, the high-efficient and service life is long；

(4) steel ball rollaway type transmission device provided by the utility model, when piston is moved away from the direction of exhaust outlet When, 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 Through-hole breather cheek valve enter cylinder interior；When piston is moved to exhaust outlet direction, the intracorporal air of piston compressing cylinder is simultaneously It is discharged by one-way exhaust valve, air enters object to be inflatable body；

(5) steel ball rollaway type transmission device provided by the utility model, piston only and rear cover have disassembly easy for installation The characteristics of, this structure is convenient for carrying out dismounting and change or maintenance to breather cheek valve, and rear cover, which has, prevents breather cheek valve from loosening Effect；

(6) steel ball rollaway type transmission device provided by the utility model, when piston is moved towards exhaust outlet, cylinder is intracorporal Air pressure is larger, compressed air act on block it is first on pressure direction from inside to outside, thus block it is first in elastic force Be tightly attached under the action of air pressure in cylinder body on the inner wall of through-hole two, prevent gas to be discharged by through-hole two；When piston to Far from exhaust outlet an end motion when, the pressure of cylinder interior is gradually reduced, formed negative pressure after, to blocking capitiform at by extroversion Interior attraction when the attraction acts on blocking first upper elastic force greater than elastic element one, blocks first and through-hole two Gap is formed between inner wall, outside air passes through the gap under the action of negative pressure and enters cylinder interior；

(7) steel ball rollaway type transmission device provided by the utility model is sealed by installing on the annular groove of piston Circle, increases the 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, it has a good application prospect；

(8) 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 steel ball rollaway type transmission device, the direction of the power acted on piston is parallel to the central axis of piston always Line, for piston in reciprocatory movement, the central axis of piston is parallel to the central axis of cylinder body always, so as to avoid due to The direction for the power that connecting rod acts on piston changes and piston is caused to generate biggish lateral pressure and frictional force to cylinder body Problem；

(9) electric air pump provided by the utility model blocks breather cheek valve, blocking that first and elastic element one forms First two and elastic element two form one-way exhaust valve have structure it is simple, dismantle, replace convenient advantage；

(10) 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.

Detailed description of the invention

Fig. 1 is steel ball rollaway type transmission structures schematic diagram；

Fig. 2 is the enlarged diagram of piston structure；

Fig. 3 is the stereoscopic schematic diagram of electric air pump ontology；

Fig. 4 is the setting position view of guide groove；

Fig. 5 is the setting position view of raceway groove 12.

In figure: 1, cylinder body；2, piston；3, connecting rod；7, exhaust outlet；8, head two is blocked；9, elastic element two；10, sealing ring； 11, rotational sleeve；12, raceway groove；13, hemispherical groove；14, annular groove；15, rear cover；16, shell；17, planet carrier； 18, central gear；19, planetary gear；20, 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 1, a kind of steel ball rollaway type transmission device, including piston 2, connecting rod 3 and rotational sleeve 11 and steel ball, institute The one end and the piston 2 for stating connecting rod 3 are an integral structure, the central axis of the piston 2 and the central axis of the connecting rod 3 It is parallel to each other, the connecting rod 3 is located in the rotational sleeve 11, and raceway groove 12, and institute are offered on the periphery of the connecting rod 3 The oval periphery for being looped around the connecting rod 3 of raceway groove 12 is stated, offers hemispherical on the inner wall of the rotational sleeve 11 Groove 13, the steel ball is between the raceway groove 12 and the spherical groove 13, and the rotational sleeve 11 is far from described One end of connecting rod 3 is connect with the driving motor.

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 raceway groove 12, and connecting rod 3 carries out flexible fortune along 11 central axial direction of rotational sleeve in rotational sleeve 11 It is dynamic, and then realize linear reciprocating motion of the piston 2 in cylinder body 1, rotational sleeve 11 is applied to the power on connecting rod 3 during this Direction and connecting rod 3 apply the direction of power on the piston 2 always with the central axis of cylinder body 1, piston 2 central axis, The central axis of connecting rod 3 is parallel always, thus the direction for avoiding the power due to the effect of connecting rod 3 on the piston 2 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 lost of life Problem also ensures that tight fit is not in gap and leads to gas leakage between piston 2 and cylinder body 1.As shown in figure 5, this implementation Raceway groove 12 is closed in example, and the oval periphery for being looped around the connecting rod 3, steel ball recycles past in raceway groove 12 The benefit of multiple rolling, the roller path structure of this closed loop is: driving motor drives rotational sleeve 11 to rotate towards a direction Realize that connecting rod 3 is periodically flexible, and the spiral rolling track of traditional non-closed loop configuration then needs to drive rotational sleeve 11 periodically Carry out positive and negative rotation be just able to achieve that connecting rod 3 is periodically flexible, the process that rotational sleeve 11 periodically carries out positive and negative rotation is adjoint Acceleration, moderating process, the abrasion between structure member it is larger.

The integral structure that piston 2 and connecting rod 3 in the present embodiment use, can be piston 2 and connecting rod 3 is integrally machined into The structure of type, can also in such a way that the piston 2 of separate structure is fixedly connected by bolt and nut etc. with connecting rod 3 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, example in the present embodiment As notification number is the structure used in the utility model of CN201218176Y in background technique.

As shown in figure 4, 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 20, connecting rod 3 passes through guide groove 20, so that connecting rod 3 can only do linear reciprocating motion in guide groove 20, without putting It is dynamic.

Embodiment 2

A kind of steel ball rollaway type transmission device, structure compared with Example 1, except that: the rotational sleeve 11 One end far from the piston 2 is equipped with the driven gear coaxial with the connecting rod 3, i.e., the axis of the described driven gear with it is described The central axis of connecting rod 3 point-blank, is provided with transmission gear, the driven gear on the output shaft of the driving motor It is intermeshed with the transmission gear, driving motor drives transmission gear rotation, and then rotational sleeve 11 is driven to rotate, and is rotating In 11 rotation process of sleeve, the steel ball in hemispherical groove 13 rolls in raceway groove 12, and at the same time drive link 3 carry out stretching motion along 11 central axial direction of rotational sleeve in rotational sleeve 11, to drive piston 2 in cylinder body 1 Move reciprocatingly, and during this connecting rod 3 apply the direction of power on the piston 2 always with the central axis of cylinder body 1, work Central axis, the central axis of connecting rod 3 of plug 2 are parallel always.

Embodiment 3

As shown in Figure 1, a kind of steel ball rollaway type transmission device, structure compared with Example 1, except that: it is described Rotational sleeve 11 is equipped with planet carrier 17 far from one end of the piston 2, is provided with teeth on the inner wall of the planet carrier 17, institute It states and is provided with central gear 18 on the output shaft of driving motor, and the planet carrier 17 and the central gear 18 surround same circle Heart rotation, is provided with planetary gear 19 between the central gear 18 and the planet carrier 17, the teeth of the planet carrier 17 with The planetary gear 19 is intermeshed, and the central gear 18 is intermeshed with the planetary gear 19, the row in the present embodiment The star wheel series kind of drive has compact-sized, small in size, large carrying capacity, transmitting power bracket and gear range is big, operation The advantages that noise is small, the high-efficient and service life is long.

Embodiment 4

As depicted in figs. 1 and 2, a kind of steel ball rollaway type transmission device, structure compared with Example 1, except that: The piston 2 offers through-hole along central axial direction, and breather cheek valve is equipped in the through-hole, and driving motor passes through drive It moves the connecting rod 3 to drive in 2 reciprocatory movement of piston, the formation negative pressure of 1 periodically of cylinder body, it is empty under the action of negative pressure Gas enters in cylinder body 1 from breather cheek valve.

Embodiment 5

As shown in Fig. 2, a kind of steel ball rollaway type transmission device, structure compared with Example 4, except that: it is described 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, it is described recessed Slot is matched with the outer diameter of the rear cover 15, the rear cover 15 and the piston only along the piston 2 central axis side To through-hole one and through-hole two is offered respectively, the breather cheek valve is installed in the through-hole two, rear cover 15 has and prevents list The effect loosened to intake valve, this structure are convenient for carrying out dismounting and change or maintenance to breather cheek valve.

Embodiment 6

As depicted in figs. 1 and 2, a kind of steel ball rollaway type transmission device, structure compared with Example 5, except that: The breather cheek valve includes blocking first and elastic element one, one end of the elastic element one and the first fixation of blocking Connection, the other end of the elastic element one are fixedly connected with the rear cover 15, and the blocking is first in the elastic element one Block the through-hole two under elastic force effect from inside to outside, block in this way it is first elastic element one from inside to outside (relative to For the position of cylinder body 1) resilient force under the clogging through-hole two to reach good blocking effect block head One position contacted with two inner wall of through-hole has round and smooth cambered surface, and the inner wall of through-hole two also has corresponding round and smooth cambered surface, through-hole Two size is slightly larger than the outer diameter for blocking first round and smooth cambered surface, 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 7

As depicted in figs. 1 and 2, a kind of steel ball rollaway type transmission device, structure compared with Example 1, except that: It is provided with annular groove 14 on the outer wall of the piston only, sealing ring 10 is installed in the annular groove 14, by work Sealing ring 10 is installed on the annular groove 14 of plug 2, the leakproofness between piston 2 and cylinder body 1 is increased, gas leakage can be prevented, is dropped The exhaust efficiency of low air inlet energy consumption, piston 2 and cylinder body 1 also improves 20% or more, has a good application prospect.

Embodiment 8

As shown in Figure 1, a kind of electric air pump, including steel ball rollaway type transmission device described in embodiment 1 and cylinder body 1, institute It states piston 2 to be located inside the cylinder body 1, the cylinder body 1 is provided with exhaust outlet 7, the exhaust outlet far from one end of the piston 2 One-way exhaust valve is installed, the driving motor is by driving the connecting rod 3 to drive the piston 2 in the cylinder body 1 at 7 It moves back and forth, the central axis of piston 2 described in reciprocatory movement is parallel to the central axis of the cylinder body 1 always.

The present apparatus course of work is as follows: the driving motor drives the connecting rod by the steel ball rollaway type transmission device 3 when driving the piston 2 far from exhaust outlet 7, forms negative pressure in cylinder body 1, air enters in the cylinder body 1 from breather cheek valve； The driving motor drives the connecting rod 3 that the piston 2 is driven to move to exhaust outlet 7 by the steel ball rollaway type transmission device When, the air in the cylinder body 1 is compressed to and passed through the discharge of the one-way exhaust valve on exhaust outlet 7, is looped back and forth like this, Ke Yishi Now to the inflation of balloon, basketball, swim ring, tire etc., the center line of piston 2 is parallel to described always in reciprocatory movement The center line of cylinder body 1.

Since the connecting rod 3 in the present apparatus will not be swung, the driving force of driving motor passes through steel ball rollaway type transmission dress After setting 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 moving back and forth In the process, the central axis of piston 2 is parallel to the central axis of cylinder body 1 always, acts on piston so as to avoid due to connecting rod 3 The direction of power on 2 changes and piston 3 is caused to generate biggish lateral pressure and frictional force to cylinder body 1, the gas in turn resulted in The problem of pump energy consumption increases, the lost of life also ensures that tight fit is not in gap and causes between piston 2 and cylinder body 1 Gas leakage.The integral structure that piston 2 and connecting rod 3 use, can be piston 2 and connecting rod 3 is integrally machined molding structure, can also be with In such a way that the piston 2 of separate structure is fixedly connected by bolt and nut etc. with connecting rod 3, so that connecting rod 3 cannot be relative to The rotation of piston 2 is swung, and piston 2 and connecting rod 3 are integrated the structure of machine-shaping in the present embodiment.

Embodiment 9

As depicted in figs. 1 and 2, a kind of electric air pump, structure compared with Example 8, except that: the unidirectional row Air valve includes that blocking head 28 and elastic element 29, one end of the elastic element 29 are fixedly connected with the blocking head 28, The other end of the elastic element 29 is fixed on the outside of the exhaust outlet 7, and the blocking head 28 is in the elastic element two The exhaust outlet 7 is blocked under the elastic force effect of 9 ecto-entads (for the position of cylinder body 1).It is better in order to reach Block effect, the position that blocking head 28 is contacted with 7 inner wall of exhaust outlet in the present embodiment with round and smooth cambered surface, exhaust outlet 7 it is interior Wall also has corresponding round and smooth cambered surface, and the size of exhaust outlet 7 is slightly larger than the outer diameter of the blocking round and smooth cambered surface of head 28, the two energy Enough fit closely.The one-way exhaust valve course of work of this structure is as follows: when piston 2 is moved towards exhaust outlet 7, in cylinder body 1 Air compressed, gas compression to a certain extent when, the pressure inside cylinder body 1 is greater than elastic element 29 and acts on blocking head Elastic force on 28, thus block head 28 and opened by gas, between the air of compression is by blocking between head 28 and exhaust outlet 7 Gap discharges, and realizes aerification function；When an end motion of the piston 2 away from exhaust outlet 7, pressure inside cylinder body 1 by Decrescence small, when pressure acts on elastic force on blocking head 28 less than elastic element 29, blocking head 28 is the effect in elastic force Under be tightly attached on the inner wall of exhaust outlet 7, prevent gas to be discharged by exhaust outlet 7.When it is implemented, the unidirectional row in the present embodiment Air valve uses structure identical with the breather cheek valve in embodiment 6, i.e. both check valves include blocking head and unidirectional member Two components of part, the connection type of two components have discussion in the present embodiment and embodiment 6, the elasticity in the present embodiment Element 29 uses spring.

Embodiment 10

As shown in figures 1 and 3, a kind of electric air pump, structure compared with Example 9, except that: further include shell 16 and exhaust passage, the cylinder body 1, the steel ball rollaway type transmission device and the driving motor be respectively positioned on the shell 16 It is interior, and one end of the shell 16 offers hole, the exhaust outlet 7 is connected to by the exhaust passage with the hole, Jiang Gebu Part is arranged in shell 16, conveniently operates with, improves safety and portability.

Claims (10)

1. a kind of steel ball rollaway type transmission device, including piston (2) and connecting rod (3), it is characterised in that: the one of the connecting rod (3) End and the piston (2) are an integral structure, and the central axis of the piston (2) and the central axis of the connecting rod (3) are mutual In parallel, the steel ball rollaway type transmission device further includes rotational sleeve (11) and steel ball, and the connecting rod (3) is located at the turning set It in cylinder (11), is offered raceway groove (12) on the periphery of the connecting rod (3), and the raceway groove (12) is oval circular Hemispherical groove (13) are offered on the periphery of the connecting rod (3), the inner wall of the rotational sleeve (11), the steel ball is located at Between the raceway groove (12) and the spherical groove (13), the one end of the rotational sleeve (11) far from the connecting rod (3) It is connect with driving motor.

2. steel ball rollaway type transmission device according to claim 1, it is characterised in that: the rotational sleeve (11) is far from institute The one end for stating piston (2) is equipped with the driven gear coaxial with the connecting rod (3), is provided on the output shaft of the driving motor Transmission gear, the driven gear and the transmission gear are intermeshed.

3. steel ball rollaway type transmission device according to claim 1, it is characterised in that: the rotational sleeve (11) is far from institute The one end for stating piston (2) is equipped with planet carrier (17), is provided with teeth, the driving motor on the inner wall of the planet carrier (17) Output shaft on be provided with central gear (18), and the planet carrier (17) and the central gear (18) turn around the same center of circle It is dynamic, it is provided between the central gear (18) and the planet carrier (17) planetary gear (19), the tooth of the planet carrier (17) Tooth and the planetary gear (19) are intermeshed, and the central gear (18) and the planetary gear (19) are intermeshed.

4. steel ball rollaway type transmission device according to claim 1, it is characterised in that: the piston (2) is along central axis Line direction offers through-hole, is equipped with breather cheek valve in the through-hole.

5. steel ball rollaway type transmission device according to claim 4, it is characterised in that: the piston (2) includes piston sheet Body and rear cover (15), the piston only open up fluted, the groove and the rear cover (15) close to one end of exhaust outlet (7) Outer diameter match, the rear cover (15) and the piston only open up respectively along the central axial direction of the piston (2) There are through-hole one and through-hole two, the breather cheek valve is installed in the through-hole two.

6. steel ball rollaway type transmission device according to claim 5, it is characterised in that: the breather cheek valve includes 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 elastic element one The other end is fixedly connected with the rear cover (15), and the blocking is first in the case where the elastic force of the elastic element one from inside to outside acts on Block the through-hole two.

7. steel ball rollaway type transmission device according to claim 5, it is characterised in that: set on the outer wall of the piston only It is equipped with annular groove (14), sealing ring (10) is installed in the annular groove (14).

8. a kind of electric air pump, it is characterised in that: be driven including steel ball rollaway type described in any one of claim 1 to 7 Device and cylinder body (1), the piston (2) are located at the cylinder body (1) inside, the one end of the cylinder body (1) far from the piston (2) It is provided with exhaust outlet (7), one-way exhaust valve is installed, the driving motor is by driving the connecting rod at the exhaust outlet (7) (3) piston (2) is driven to move back and forth in the cylinder body (1).

9. electric air pump according to claim 8, it is characterised in that: the one-way exhaust valve include blocking head two (8) and Elastic element two (9), one end of the elastic element two (9) are fixedly connected with the blocking head two (8), the elastic element two (9) the other end is fixed on the outside of the exhaust outlet (7), and the blocking head two (8) is in the elastic element two (9) by extroversion The exhaust outlet (7) is blocked under interior elastic force effect.

10. electric air pump according to claim 9, it is characterised in that: further include shell (16) and exhaust passage, the cylinder Body (1), the steel ball rollaway type transmission device and the driving motor are respectively positioned in the shell (16), and the shell (16) One end offer hole, the exhaust outlet (7) is connected to by the exhaust passage with the hole.