CN215057971U - Low-pressure large-flow air pump - Google Patents

Abstract

The utility model relates to a large-traffic air pump of low pressure, including shell, inner tube and piston, the inner tube is hollow columnar structure, one side of inner tube is equipped with left closing cap, and the opposite side is equipped with right closing cap, the piston suit is in the outside of inner tube, and is located between left side closing cap and the right closing cap, the shell suit is in the outside of inner tube and piston, will the surface of piston and the surface seal of left side closing cap and right closing cap, the drive is installed to inside one side of inner tube the piston is in back and forth movement's transmission between left side closing cap and the right closing cap, the fretwork air flue of connecting the both sides terminal surface is seted up to the inside of piston, the check valve is all installed at the both ends of fretwork air flue, air exchange interface arrangement is installed to the inside opposite side of inner tube. The air pump belongs to a reciprocating displacement pump, adopts a reciprocating double-action to realize continuous work, and can realize air suction and compression back and forth, thereby providing larger flow.

Description

Low-pressure large-flow air pump

Technical Field

The utility model relates to an air pump technical field especially relates to a large-traffic air pump of low pressure.

Background

In the case of large-volume inflatable cushions and inflatable airbag products, most of them are not suitable for frequent inflation and deflation, because the inflation amount is large, the inflation process is slow, and an air pump with sufficient flow rate is provided, or the noise is large, or the high power is required to be provided, so that the cost is high. In fact, the air cushions require very low pressure, only high flow rate and low power, so that in many occasions, people can use a manual air pump to solve the problem, and the reduction of the air inflation speed greatly reduces the service performance of products such as the air cushions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a large-traffic air pump of low pressure to solve the problem that meets in the above-mentioned background art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a large-traffic air pump of low pressure, includes shell, inner tube and piston, the inner tube is hollow columnar structure, one side of inner tube is equipped with left closing cap, and the opposite side is equipped with right closing cap, the piston suit is in the outside of inner tube, and is located between left closing cap and the right closing cap, the shell suit is in the outside of inner tube and piston, will the surface of piston and the surface seal of left closing cap and right closing cap, the drive is installed to inside one side of inner tube the piston is in reciprocating motion's transmission makes a round trip between left closing cap and the right closing cap, the fretwork air flue of connecting both sides terminal surface is seted up to the inside of piston, the check valve is all installed at the both ends of fretwork air flue, the interface arrangement that takes a breath is installed to the inside opposite side of inner tube.

In the scheme, the hollow air passages are at least provided with two parts and located at the upper part and the lower part of the piston, a left exhaust pipe is arranged on one side, close to the left sealing cover, of the hollow air passage at the upper part, a right exhaust pipe is arranged on one side, close to the right sealing cover, of the hollow air passage at the lower part, a left air suction pipe is arranged on one side, close to the left sealing cover, of the hollow air passage at the upper part, a right air suction pipe is arranged on one side, close to the right sealing cover, of the hollow air passage at the upper part, and the check valves are respectively installed inside the left exhaust pipe, the right exhaust pipe, the left air suction pipe and the right air suction pipe.

In the scheme, the piston is internally provided with a groove, and a sliding plate is clamped and fixed in the groove; a motor is arranged in the inner cylinder, and an output shaft of the motor is in transmission connection with a transmission device; the output end of the transmission device drives the piston to reciprocate back and forth between the left sealing cover and the right sealing cover through a sliding plate.

In the above scheme, transmission includes worm gear mechanism, gear, action wheel and follows the driving wheel, worm in the worm gear mechanism is connected with the output shaft transmission of motor, the turbine in the worm gear mechanism is connected with gear wheel meshing through the pinion that is connected, the axle center department of gear is through the axle center department fixed connection of pivot with the action wheel, the outside at the inner tube is installed with following the driving wheel to the action wheel, and is located on the central axis of recess, the action wheel passes through the drive belt and is connected with following driving wheel transmission, the outside of drive belt is equipped with the cylinder, vertical spout has been seted up to the inside of slide, the cylindrical body is located in the spout.

In the above scheme, the transmission belt is any one of a chain and a synchronous toothed belt, and the driving wheel and the driven wheel are matched with the transmission belt for transmission.

In the scheme, the piston is made of light materials.

In the above scheme, the piston is made of integrated foam.

In the above scheme, the inboard and the outside of piston are provided with the seal groove respectively, install the sealing washer in the seal groove.

In the above scheme, the ventilation interface device includes an air inlet and an air outlet that are isolated from each other, the air inlet is connected with the ventilation pipe of the hollow airway at the upper part through a pipeline, and the air outlet is connected with the ventilation pipe of the hollow airway at the lower part through a pipeline.

In the above scheme, the inside of air inlet and gas outlet is installed the check valve respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the motor fixed in the inner cylinder through the support is decelerated through the worm gear mechanism and the pair of gears to drive the left driving wheel, the driving wheel drives the driving belt matched with the driving wheel to move circularly, and the raised cylinder on the driving belt is clamped in the sliding groove of the driving sliding plate to drive the piston which is fixedly connected and is made of foam to move left and right. The air pump belongs to a reciprocating displacement pump, realizes continuous work by adopting a reciprocating double-action mode, and can realize air suction and compression back and forth, namely, a piston is used for air compression and is also a channel for high-low pressure conversion and air flow, so that larger flow can be provided, and the use of the existing air bag or air cushion is met.

2. The transmission device adopts finished parts and the piston adopts a customized foaming piece, so that the cost can be greatly reduced, and the sealing requirement is reduced; the long piston is adopted, the hollow air passage is formed on the piston, and the double functions of air suction and compression are realized in the simplest mode by combining the air exchange interface device; the installation positions of the motor and the transmission device are arranged in the central shaft of the piston, the problem of low space utilization rate formed by the long-length piston is solved, the circular drive with small diameter is converted into large-stroke reciprocating motion through the transmission belt, the space utilization rate is further improved, and the noise during operation is further reduced.

Drawings

FIG. 1 is a schematic view of the overall external structure of the present invention;

FIG. 2 is a schematic view of the semi-sectional structure along the central axis of the present invention;

FIG. 3 is a schematic structural view of the present invention with the outer shell removed;

FIG. 4 is a schematic view of FIG. 3 in a half-section configuration along the central axis;

FIG. 5 is a schematic structural view of the present invention when the piston moves to the right;

FIG. 6 is a schematic view of a part of the structure of the transmission device inside the inner cylinder of the present invention;

FIG. 7 is a schematic view of a partial structure of a transmission device outside the inner cylinder of the present invention;

reference numbers in the figures: 1-a housing; 11-a support seat; 12-a fixed cover; 2-inner cylinder; 21-left cover; 22-right sealing cover; 23-a motor; 24-a transmission; 241-a worm gear mechanism; 242-bull gear; 243-driving wheel; 244-a driven wheel; 245-a drive belt; 246-cylinder; 247-pinion gear; 25-a ventilation interface device; 251-an air inlet; 252-gas outlet; 26-a control panel; 3-a piston; 31-left exhaust pipe; 32-right exhaust pipe; 33-left suction pipe; 34-a right suction pipe; 35-a one-way valve; 36-hollowed out air passages; 37-a slide plate; 371-the chute; 38-groove.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1 and 2, a low-pressure high-flow air pump includes a housing 1, an inner cylinder 2, and a piston 3. The inner cylinder 2 is a hollow cylindrical structure, one side of the inner cylinder 2 is provided with a left sealing cover 21, the other side of the inner cylinder 2 is provided with a right sealing cover 22, and the piston 3 is sleeved outside the inner cylinder 2 and is positioned between the left sealing cover 21 and the right sealing cover 22. When the air pump is used in a vertical position, the support base 11 is mounted at the bottom of the housing 1, and the fixing cover 12 fixed with the right sealing cover 22 is mounted at the top. When the user state that air pump set up in this scheme was placed for the level, the soft callus on the sole of both sides installation of shell 1 supported whole air pump.

Piston 3 adopts the light material preparation to form, and piston 3 can adopt the integral type foam preparation to form, adopts the foam spare as piston 3, and the dead weight is little, other parts work of cooperation that can be better. The main body of the piston 3 can be formed by splicing thin-wall parts and can also be integrally formed, and the integrally formed light material can be made of foaming materials. The integral shape is more regular and the contact surfaces of the two parts forming the gap have a longer length, thereby reducing leakage between the high and low pressure regions.

The shell 1 is sleeved on the outer sides of the inner cylinder 2 and the piston 3, and seals the outer surface of the piston 3 and the outer surfaces of the left sealing cover 21 and the right sealing cover 22. The main body of the piston 3 is a hollow cylinder, the hollow part is also a cylinder, the hollow cylinder is sleeved on the thin-wall pipe of the inner cylinder 2, the outer edge surface of the hollow cylinder is arranged in the thin-wall pipe of the outer shell 1, and has a small clearance with the inner pipe or the outer pipe, when the piston 3 reciprocates, the hollow cylinder slides with the outer pipe and the inner pipe, and the formed high-pressure area and the low-pressure area are isolated by a far and narrow clearance due to the small clearance.

As a preferred scheme, the inner side and the outer side of the piston 3 are respectively provided with a sealing groove, a sealing ring is arranged in the sealing groove, and the sealing ring is arranged between the piston 3 and the thin walls between the shell 1 and the inner cylinder 2, so that a high-pressure area and a low-pressure area are completely isolated, and a better sealing effect is achieved.

Referring to fig. 3 to 5, a groove 38 is formed in the piston 3, the groove 38 is a long waist hole-shaped structure, a sliding plate 37 is fixed in the groove 38 in a clamping manner, the upper portion and the lower portion of the middle of the groove 38 can be grooved, and then the sliding plate 37 is clamped in the upper groove hole and the lower groove hole through screws. A sprocket chain or a pulley belt for transmission may be disposed in the groove 38 without exceeding the outer cylindrical surface, thereby allowing the entire piston 3 to reciprocate in the outer tube.

One side of the inner part of the inner cylinder 2 is provided with a transmission device 24 for driving the piston 3 to reciprocate back and forth between the left sealing cover 21 and the right sealing cover 22, the inner part of the inner cylinder 2 is provided with a motor 23, and an output shaft of the motor 23 is in transmission connection with the transmission device 24. The output of the transmission 24 drives the piston 3 to reciprocate back and forth between the left cover 21 and the right cover 22 through the slide plate 37.

Referring to fig. 6 and 7, the transmission 24 includes a worm gear 241, a gear 242, a driving wheel 243, and a driven wheel 244. The worm in the worm gear mechanism 241 is in transmission connection with the output shaft of the motor 23, the worm wheel in the worm gear mechanism 241 is in meshing connection with the large gear 242 through the connected small gear 247, the axis of the gear 242 is fixedly connected with the axis of the driving wheel 243 through the rotating shaft, the driving wheel 243 and the driven wheel 244 are installed on the outer side of the inner barrel 2 and are located on the central axis of the groove 38, the driving wheel 243 is in transmission connection with the driven wheel 244 through the transmission belt 245, the outer side of the transmission belt 245 is provided with a cylinder 246, a vertical sliding groove 371 is formed in the sliding plate 37, and the body of the cylinder 246 is located in the sliding groove 371.

The transmission device 24 is provided with two, and is located the both sides of inner tube 2, two recesses 38 also exist in the inside both sides of piston 3, the cylinder 246 is equipped with on the drive belt 245, when moving, cylinder 246 card is in the spout 371 in the middle of piston both sides slide 37 for reciprocating motion about piston 3 can, but cylinder 246 can not be at spout 371 internal rotation, and then make the air flue of downside and upside do linear motion, can be all the time through the opening of central pipeline, the final position of taking a breath of moving to the interface arrangement of taking a breath 25.

In the transmission device 24, the worm gear mechanism 241 drives the driving wheel 243 and the driven wheel 244 to move, and further drives the transmission belt 245 to move, force is transmitted to the piston 3 through the cylinder 246 structure, and finally the piston 3 is driven to reciprocate, so that the overall structure has high space utilization rate.

Preferably, the transmission belt 245 is any one of a chain and a timing belt, and the driving pulley 243 and the driven pulley 244 are driven by the transmission belt 245. The transmission belt 245 formed by a chain or a synchronous belt drives the piston 3 to realize reciprocating motion at a lower speed, and meets the requirements of low-noise, low-pressure and large-flow air compression or air extraction by matching with a larger section and stroke.

Referring to fig. 3 to 5, a hollow air passage 36 is formed inside the piston 3 to connect end surfaces of two sides, and check valves 35 are installed at two ends of the hollow air passage 36. Specifically, fretwork air flue 36 is equipped with two at least and is located the upper portion and the lower part of piston 3, one side that upper portion fretwork air flue 36 is close to left closing cap 21 is equipped with left blast pipe 31, one side that upper portion fretwork air flue 36 is close to right closing cap 22 is equipped with right blast pipe 32, one side that lower part fretwork air flue 36 is close to left closing cap 21 is equipped with left breathing pipe 33, one side that upper portion fretwork air flue 36 is close to right closing cap 22 is equipped with right breathing pipe 34, check valve 35 is installed respectively in left blast pipe 31, right blast pipe 32, left breathing pipe 33, the inside of right breathing pipe 34.

The piston 3 is provided with a plurality of air valve structures, and each end surface is provided with at least two one-way valves 35 with opposite acting directions, which respectively allow air to enter and exhaust, so that when the piston 3 moves in any direction, the spaces at the two ends of the piston 3 are compressed, and the spaces at the other end of the piston are expanded. The compressed side compresses and discharges the gas through the one-way valve 35 and the hollow air passages 36 on the upper and lower sides of the piston 3, and finally through the ventilation interface device 25. Meanwhile, the volume of the other side of the piston 3 is in an enlarged space, and air is finally sucked from the outside through the check valve 35, the hollow air passages 36 on the upper side and the lower side of the piston 3 and the air exchange interface device 25.

The other side of the inner cylinder 2 is provided with a ventilation interface device 25 for compressing and discharging gas. The ventilation interface device 25 comprises an air inlet 251 and an air outlet 252 which are isolated from each other, the air inlet 251 is connected with the ventilation pipe of the upper hollow air passage 36 through a pipeline, and the air outlet 252 is connected with the ventilation pipe of the lower hollow air passage 36 through a pipeline.

Preferably, the check valves 35 are respectively installed inside the air inlet 251 and the air outlet 252, and the connection with the outside is cut off when the pump is not operated, so that the pressure change of the external load caused by the leakage existing inside is avoided.

The utility model discloses, fix the motor 23 in inner tube 2 through the support, through turbine worm mechanism 241 and a pair of gear reduction back, drive left action wheel 243, action wheel 243 drives rather than matched with drive belt 245 endless motion, and bellied cylinder 246 card is in drive slide 27's spout 271 on the drive belt 245, drives fixed connection's the piston 3 side-to-side movement that adopts the foam to make from this.

When the piston 3 does not move, the exhaust pipes (the left exhaust pipe 31 and the right exhaust pipe 32) at the upper side and the suction pipes (the left suction pipe 33 and the right suction pipe 34) at the lower side are closed by means of elasticity or additional springs, and the high-pressure area and the low-pressure area have small clearance and longer distance with the inner pipeline of the shell 1 and the outer pipeline of the inner cylinder 2 because the piston 3 has certain elasticity, so that leakage is slow.

Referring to fig. 4, when the piston 3 moves to the right, the right space is reduced, the pressure is increased, and increased to a certain extent, the right exhaust pipe is opened, air enters the hollow air passage 36 of the left exhaust pipe 31, the oblong air passage always covers the ventilation holes at the upper part of the inner circular pipe, and therefore, the compressed air passes through the ventilation holes and the ventilation interface device 25, and is finally discharged through the air inlet 251.

Referring to fig. 5, when the piston 3 starts to return to the rightmost side, the space increases, the air pressure decreases, the exhaust valve closes, when the pressure further decreases, the right inhalation valve 34 on the lower side opens, the outside air passes through the air outlet 252, the duct on the ventilation interface device 25 further enters the hollow air duct 36 on the lower side through the ventilation hole on the fully covered inner duct, and finally enters the space on the right side of the piston 3 through the check valve 35, thereby completing inhalation.

When the piston 3 moves rightward, the right space is reduced, but the left space is enlarged, and the air on the right side is compressed and sent to the air inlet, while the space on the left side is enlarged, and through the same process, the air is sucked from the air outlet 252. When the piston 3 moves leftward, the space on the left side is reduced and air is sent to the air inlet 251 through the left air outlet pipe 31 on the left side, and the space on the right side is enlarged and air is sucked in through the air outlet 252, so that the compression and the extraction of air are simultaneously performed regardless of the direction in which the piston 3 moves, thereby providing a continuous action.

The air pump belongs to a reciprocating displacement pump, adopts a reciprocating double-action to realize continuous work, and can realize air suction and compression back and forth, namely, the piston 3 is used for air compression and is also a passage for high-low pressure conversion and air flow, thereby being capable of providing larger flow; the transmission device 24 adopts finished parts and the piston 3 adopts a customized foaming piece, so that the cost can be greatly reduced, and the sealing requirement is reduced; the long piston 3 is adopted, the hollow air channel 36 is formed on the piston 3, and the double functions of air suction and compression are realized in the simplest mode by combining the air exchange interface device 25; the installation positions of the motor 23 and the transmission device 24 are arranged in the central shaft of the piston 3, the problem of low space utilization rate formed by the long piston 3 is solved, the transmission belt 245 is used for converting the small-diameter circumference drive into the large-stroke reciprocating motion, the space utilization rate is further improved, and the noise in operation is reduced.

When the piston 3 adopts the diameter of 130mm and the length of 600mm, the air pump can provide the flow rate of more than 500L per minute and the low-pressure of 5KPa-20KPa under the condition of low noise, and the air bag or the air cushion can not be damaged even under the limit condition.

The above-mentioned embodiments further explain in detail the objects, technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the embodiments of the present invention, and are not intended to limit the scope of the present invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims (10)

1. A low-pressure large-flow air pump is characterized in that: the device comprises a shell (1), an inner barrel (2) and a piston (3), wherein the inner barrel (2) is of a hollow columnar structure, a left sealing cover (21) is arranged on one side of the inner barrel (2), a right sealing cover (22) is arranged on the other side of the inner barrel (2), the piston (3) is sleeved on the outer side of the inner barrel (2) and is positioned between the left sealing cover (21) and the right sealing cover (22), the shell (1) is sleeved on the outer sides of the inner barrel (2) and the piston (3) and seals the outer surfaces of the piston (3) and the left sealing cover (21) and the right sealing cover (22), a transmission device (24) for driving the piston (3) to reciprocate between the left sealing cover (21) and the right sealing cover (22) is arranged on one side of the inner part of the inner barrel (2), hollow air passages (36) for connecting end faces on two sides are formed in the piston (3), one-way valves (35) are arranged at two ends of the hollow air passages (36), and a ventilation interface device (25) is arranged on the other side in the inner cylinder (2).

2. A low pressure high flow air pump according to claim 1, characterized in that: the piston is characterized in that at least two hollow air passages (36) are arranged and are located at the upper portion and the lower portion of the piston (3), the hollow air passages (36) are close to one side of the left sealing cover (21) to form a left exhaust pipe (31), the hollow air passages (36) are close to one side of the right sealing cover (22) to form a right exhaust pipe (32), the hollow air passages (36) are close to one side of the left sealing cover (21) to form a left air suction pipe (33), the hollow air passages (36) are close to the upper portion to form a right air suction pipe (34), and the check valves (35) are installed inside the left exhaust pipe (31), the right exhaust pipe (32), the left air suction pipe (33) and the right air suction pipe (34) respectively.

3. A low pressure high flow air pump according to claim 1, characterized in that: a groove (38) is formed in the piston (3), and a sliding plate (37) is clamped and fixed in the groove (38); a motor (23) is arranged in the inner barrel (2), and an output shaft of the motor (23) is in transmission connection with a transmission device (24); the output end of the transmission device (24) drives the piston (3) to reciprocate back and forth between the left cover (21) and the right cover (22) through a sliding plate (37).

4. A low pressure high flow air pump according to claim 3, characterized in that: the transmission device (24) comprises a worm gear mechanism (241), a gear (242), a driving wheel (243) and a driven wheel (244), the worm in the worm gear mechanism (241) is in transmission connection with the output shaft of the motor (23), the worm wheel in the worm gear mechanism (241) is meshed and connected with the large gear (242) through the connected small gear (247), the axle center of the gear (242) is fixedly connected with the axle center of the driving wheel (243) through a rotating shaft, the driving wheel (243) and the driven wheel (244) are arranged on the outer side of the inner cylinder (2), and is positioned on the central axis of the groove (38), the driving wheel (243) is in transmission connection with the driven wheel (244) through a transmission belt (245), the outside of drive belt (245) is equipped with cylinder (246), vertical spout (371) have been seted up to the inside of slide (37), the body of cylinder (246) is located in spout (371).

5. A low pressure high flow air pump according to claim 4, characterized in that: the transmission belt (245) is any one of a chain and a synchronous toothed belt, and the driving wheel (243) and the driven wheel (244) are matched with the transmission belt (245) for transmission.

6. A low pressure high flow air pump according to claim 1, characterized in that: the piston (3) is made of light materials.

7. A low pressure high flow air pump according to claim 6, characterized in that: the piston (3) is made of integrated foam.

8. A low pressure high flow air pump according to claim 1, characterized in that: and sealing grooves are respectively arranged on the inner side and the outer side of the piston (3), and sealing rings are installed in the sealing grooves.

9. A low pressure high flow air pump according to claim 1, characterized in that: the air exchange interface device (25) comprises an air inlet (251) and an air outlet (252) which are mutually isolated, the air inlet (251) is connected with an air exchange pipe of the upper hollow air passage (36) through a pipeline, and the air outlet (252) is connected with an air exchange pipe of the lower hollow air passage (36) through a pipeline.

10. A low pressure high flow air pump according to claim 9, characterized in that: and one-way valves (35) are respectively arranged in the air inlet (251) and the air outlet (252).

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