CN207059673U - A kind of air pump with overbottom pressure - Google Patents

Abstract

The utility model discloses a kind of air pump with overbottom pressure, belong to onboard accessory technical field, it includes motor, cylinder and switching valve, motor connection crankcase, and crankcase drives the piston rod of cylinder, is characterised by：The gas outlet of cylinder connects the air inlet of switching valve, is provided with check valve on air inlet, the first gas port and the second gas port being connected with air inlet is offered in switching valve, the first gas port and the second gas port are respectively positioned on the rear end of air inlet, magnetic valve connected on the first gas port.This air pump enables to cylinder to enter switching valve by check valve, gives air spring gas injection, is outwards vented by magnetic valve；Magnetic valve is gradually reduced, when being not enough to overcome the elastic force of the first elastomer during gas discharges to the active force of piston; first elastomer will promote piston to be moved to top; closure is on the first passage so that residual gas is not then exhausted from, and completes overbottom pressure protection.

Description

A kind of air pump with overbottom pressure

Technical field

The utility model belongs to onboard accessory technical field, and in particular to a kind of air pump with overbottom pressure.

Background technology

Because air spring has good coefficient of elasticity, its soft or hard degree can automatically adjust as needed, by with In the suspension of vehicle.In high vehicle speeds, air spring is hardened to improve the stability of vehicle body；Run at a low speed When, air spring softens to improve damping comfortableness.So the vehicle equipped with air spring possesses higher behaviour than other automobiles Control the limit and comfort level so that air spring is widely applied and promoted on vehicle.

In actual applications, compressed air generally is provided for air spring by air pump, realizes the elasticity system of air spring Number regulation.When air spring needs to be hardened, air pump work, high pressure air is pressed into；When air spring needs to soften, then release Release Partial shrinkage air.But, it is necessary to ensure to retain certain pressure in air spring during compressed air is discharged, with Reduce the injury to air spring, be easy to extend its service life.

But current air pump there is no this function.

The content of the invention

Technical problem to be solved in the utility model is to provide a kind of air pump with overbottom pressure, can be automatically performed remaining Pressure protection.

In order to solve the above technical problems, the technical solution of the utility model is：A kind of air pump with overbottom pressure is designed, is wrapped Motor, cylinder and switching valve, motor connection crankcase are included, crankcase drives the piston rod of cylinder, it is characterised in that：Cylinder goes out Gas port connects the air inlet of switching valve, is provided with check valve on air inlet, and the to be connected with air inlet is offered in switching valve One gas port and the second gas port, the first gas port and the second gas port are respectively positioned on the rear end of air inlet, and magnetic valve is connected on the first gas port；

The magnetic valve includes shell, and skeleton is provided with shell, and cavity is offered in skeleton, is opened up on the roof of skeleton Have the first passage, the second passage offered in side wall, the first passage and the second passage connect cavity, in cavity from Bottom to top is sequentially installed with fixed core, dynamic iron core and piston, and the periphery of fixed core is wound with magnet coil, fixed core and dynamic iron core Between be provided with the first elastomer, be provided with the second elastomer between dynamic iron core and piston, the top external diameter of piston is more than the first ventilation The internal diameter in hole.

Preferably, drying chamber is connected on second gas port.

Preferably, the check valve is metallic membrane and resilient plug, and metallic membrane is located at the air inlet side of air inlet, resilient plug Positioned at the outlet side of air inlet.

Preferably, the top of the piston is provided with sealing gasket.

Preferably, the roof of the skeleton is tapered in what is sunk, and the first passage is located at cone tip part.

Preferably, the top of the dynamic iron core offers the first guide groove, and piston can be inserted into the first guide groove.

Preferably, the bottom of the dynamic iron core offers the second guide groove, and the first elastomer is in the second guide groove with moving Iron core is connected.

Preferably, first elastomer and the second elastomer are spring.

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

1st, because the gas outlet of cylinder connects by check valve the air inlet of switching valve, magnetic valve, energy are connected in switching valve Enough so that gas enters switching valve by check valve, air spring gas injection is given, and needs to deflate and then can outwards be arranged by magnetic valve Gas；During exhaust, magnet coil obtain it is electric, fixed core produce suction, force dynamic iron core to overcome the elastic force of the first elastomer to move down, Dynamic iron core and the distance of piston space increase, and the elastic force of the second elastomer reduces, in the effect of piston self gravitation and compressed gas Under, piston moves to bottom direction, departs from the top shape of the first passage, now the first passage, the second passage and inner chamber Into path, gas is discharged by the path, during gas discharges, the active force of piston is gradually reduced, waits to be not enough to When overcoming the elastic force of the first elastomer, the first elastomer will promote piston to be moved to top, block on the first passage so that Residual gas is not then exhausted from, and completes overbottom pressure protection.

2nd, due to connecting drying chamber on the second gas port, compressed pressure-air can be caused to be supplied to sky after drying Gas spring, beneficial to the service life for extending air spring.

3rd, it is simple in construction due to the mode that check valve is combined from metallic membrane and resilient plug, it can be entered according to air pressure Row self-contr ol, is easy to implement, securely and reliably.

4th, because the top of piston is provided with sealing gasket, the sealing property of top land is added, can fully cut off gas circuit.

5th, because the roof of skeleton is tapered in what is sunk, the first passage is located at cone tip part so that the first passage is located at Protuberance, it is easy to block.

6th, because the top of dynamic iron core offers the first guide groove, piston can be inserted into the first guide groove, the work of constraint The moving direction of plug, it is ensured that the top of piston is controlled the accurate break-make of the first passage.

7th, because the bottom of dynamic iron core offers the second guide groove, the first elastomer in the second guide groove with dynamic iron core phase Connection, the moving direction of dynamic iron core can be preferably constrained, so as to be that the moving direction for ensuring piston lays the foundation.

8th, the utility model is simple in construction, can realize overbottom pressure during gas discharge by the cooperation of piston and dynamic iron core Control, is easy to popularization and application in industry.

Brief description of the drawings

Fig. 1 is dimensional structure diagram of the present utility model；

Fig. 2 is the dimensional structure diagram of switching valve；

Fig. 3 is Fig. 2 A direction views；

Fig. 4 is B-B sectional views in Fig. 3；

Fig. 5 is C-C sectional views in Fig. 3；

Fig. 6 is the dimensional structure diagram of magnetic valve；

Fig. 7 is Fig. 6 D direction views；

Fig. 8 is E-E sectional views in Fig. 7.

Marked in figure：1st, motor；2nd, crankcase；3rd, cylinder；4th, switching valve；5th, magnetic valve；6th, drying chamber；7th, air inlet； 8th, the second gas port；9th, the first gas port；10th, metallic membrane；11st, shell；12nd, skeleton；13rd, the second passage；14th, the first ventilation Hole；15th, fixed core；16th, magnet coil；17th, dynamic iron core；18th, piston；19th, sealing gasket；20th, cavity；21st, the first spring；22、 Second spring；23rd, the first guide groove；24th, the second guide groove；25th, resilient plug.

Embodiment

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.

The utility model is with reference to the gas flow direction from front to back when being inflated to air spring, i.e. before the upstream end of air is End, is correspondingly rear end by the outflow end of air.In magnetic valve 5, it is in shown in Fig. 4 during state, close to following one Hold as bottom, top is defined as correspondingly close to one end above.

As shown in figure 1, the motor 1 in the utility model connects crankcase 2, crankcase 2 drives the piston rod of cylinder 3, gas The air inlet 7 of the gas outlet connection switching valve 4 of cylinder 3, as shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the air inlet side of air inlet 7 sets gold Belong to diaphragm 10, outlet side sets resilient plug 25.The first gas port 9 and the second gas being connected with air inlet 7 are offered in switching valve 4 Mouth 8, the first gas port 9 and the second gas port 8 are respectively positioned on the rear end of air inlet 7, and magnetic valve 5, the second gas port 8 are connected on the first gas port 9 Upper connection drying chamber 6.

Magnetic valve 5 used is provided with skeleton 12 in shell 11, opened up in skeleton 12 free as shown in Fig. 6, Fig. 7 and Fig. 8 Chamber 20, the roof of skeleton 12 is tapered in what is sunk, and cone tip part offers the first passage 14, and the is offered in the side wall of skeleton 12 Two passages 13, the first passage 14 connect cavity 20 with the second passage 13.It is sequentially installed with cavity 20 from bottom to top Fixed core 15, dynamic iron core 17 and piston 18, the periphery of fixed core 15 are wound with magnet coil 16, and the top of dynamic iron core 17 offers First guide groove 23, piston 18 can be inserted into the first guide groove 23, and second spring is connected between dynamic iron core 17 and piston 18 22, the bottom of dynamic iron core 17 offers the second guide groove 24, is connected with the first spring 21 on fixed core 15, the first spring 21 it is another One end is located in the second guide groove 24, and is connected with dynamic iron core 17, and the top of piston 18 is provided with sealing gasket 19, sealing gasket 19 External diameter be more than the first passage 14 internal diameter.

In use, by the gas port connection air spring of drying chamber 6.When increasing the rigidity of air spring, motor 1 is connected Working power, the piston for driving cylinder 3 by crankcase 2 are moved reciprocatingly, and in the presence of compressed gas, metallic membrane 10 is sent out Change shape, is no longer fitted tightly on air inlet 7 so that compressed gas enters air inlet 7, presses resilient plug 25, disengages it from Closure to air inlet 7, so as to enter drying chamber 6 by the second gas port 8, air spring is supplied to after drying.

During above-mentioned supply, magnet coil 16 is in off-position, and dynamic iron core 17 is under the effect of the first spring 21 It is pushed to the direction of piston 18, drives second spring 22 and piston 18 to be moved to the top orientation of skeleton 12, piston 18 is simultaneously the In the presence of two springs 22, its top is blocked on the first blow vent, due to the first spring 21 and the active force of second spring 22 It is sufficiently large, cause compressed air to push away not open piston 18, realize the sealing to the first gas port 9.

When needing to increase the flexibility of air spring, the working power of motor 1 is cut off, cylinder 3 does not re-supply compressed air, In the presence of compressed air is lost, metallic membrane 10 and resilient plug 25 recover the closure to air inlet 7.Now, electromagnetism is connected The power supply of coil 16, under electromagnetic action, fixed core 15 produces suction so that dynamic iron core 17 overcome the elastic force of the first spring 21 to The side of fixed core 15 is moved, now, the elastic force increase of the first spring 21, and because the distance between dynamic iron core 17 and piston 18 increases, The elastic force of second spring 22 then reduces, and in the presence of the self gravitation of piston 18 and compressed gas, piston 18 moves to bottom direction It is dynamic, depart from the closure to the first passage 14 so that the top of the first passage 14, the second passage 13 and inner chamber forms logical Road, gas are discharged by the path, and during gas discharges, gas is gradually reduced to the active force of piston 18, treats deficiency During overcoming the elastic force of the first spring 21, the first spring 21 will promote piston 18 to be moved to top, block in the first passage 14 On so that residual gas is not then exhausted from, and completes overbottom pressure protection.

It is described above, only it is preferred embodiment of the present utility model, is not that other forms are made to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of change.But it is every without departing from the content of the technical scheme of the utility model, it is real according to technology of the present utility model Any simple modification, equivalent variations and the remodeling that confrontation above example is made, still fall within the guarantor of technical solutions of the utility model Protect scope.

Claims (8)

1. a kind of air pump with overbottom pressure, including motor, cylinder and switching valve, motor connection crankcase, crankcase band are taken offence The piston rod of cylinder, it is characterised in that：The gas outlet of cylinder connects the air inlet of switching valve, is provided with check valve on air inlet, cuts The first gas port and the second gas port for offering and being connected with air inlet are changed on valve, and the first gas port and the second gas port are respectively positioned on air inlet Rear end, connect magnetic valve on the first gas port；

The magnetic valve includes shell, and skeleton is provided with shell, and cavity is offered in skeleton, and is offered on the roof of skeleton Offer the second passage on one passage, side wall, the first passage and the second passage connect cavity, in cavity the bottom of from extremely Top is sequentially installed with fixed core, dynamic iron core and piston, and the periphery of fixed core is wound with magnet coil, between fixed core and dynamic iron core Provided with the first elastomer, the second elastomer is provided between dynamic iron core and piston, the top external diameter of piston is more than the first passage Internal diameter.

2. the air pump according to claim 1 with overbottom pressure, it is characterised in that：Drying is connected on second gas port Tank.

3. the air pump according to claim 2 with overbottom pressure, it is characterised in that：The check valve is metallic membrane and bullet Property plug, metallic membrane are located at the air inlet side of air inlet, and resilient plug is located at the outlet side of air inlet.

4. the air pump according to any one of claims 1 to 3 with overbottom pressure, it is characterised in that：The top peace of the piston Equipped with sealing gasket.

5. the air pump according to claim 4 with overbottom pressure, it is characterised in that：The roof of the skeleton is in the cone to sink Type, the first passage are located at cone tip part.

6. the air pump according to claim 5 with overbottom pressure, it is characterised in that：The top of the dynamic iron core offers One guide groove, piston can be inserted into the first guide groove.

7. the air pump according to claim 6 with overbottom pressure, it is characterised in that：The bottom of the dynamic iron core offers Two guide grooves, the first elastomer are connected in the second guide groove with dynamic iron core.

8. the air pump according to claim 7 with overbottom pressure, it is characterised in that：First elastomer and the second elasticity Body is spring.