CN206309600U - A kind of blade is evacuated pump frame - Google Patents
A kind of blade is evacuated pump frame Download PDFInfo
- Publication number
- CN206309600U CN206309600U CN201621456298.8U CN201621456298U CN206309600U CN 206309600 U CN206309600 U CN 206309600U CN 201621456298 U CN201621456298 U CN 201621456298U CN 206309600 U CN206309600 U CN 206309600U
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- boss
- base body
- pump
- seal groove
- motor
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Abstract
The utility model discloses a kind of blade pumping pump frame, the pump housing and motor for connecting blade aspiration pump are provided with first boss and second boss, can improve the assembling perpendicularity between motor and base body in the groove of base body lower surface；The upper surface of base body is provided with some equally distributed pump housing installation bases, can improve the assembling perpendicularity between the pump housing of aspiration pump and base body, so as to improve the assembly precision of aspiration pump, reduces frictional heating.Additionally, by setting the first seal groove, the second seal groove and motor seal seat on base body, and coordinate corresponding sealing ring, be conducive to improving the sealing property and discharge stability of aspiration pump.In assembling, the base provided using the utility model can not only aid in the assembling of each parts of aspiration pump to blade aspiration pump, can also improve the overall performance of aspiration pump.
Description
Technical field
The utility model is related to blade to be evacuated pump technical field, more particularly to a kind of blade pumping pump frame.
Background technology
Blade aspiration pump, is mainly made up of pump cover, the pump housing and motor, wherein, the pump housing includes stator, rotor and blade, is
A kind of utilization rotor and the blade that can be slided in rotor slot, under the rotarily driving of motor shaft, complete continuous air extraction, compress and
The capacity aspiration pump of exhaust process.
At present, most of blade aspiration pumps, in assembling, are all that a connecting plate, connecting plate are set between the pump housing and motor
Effect be the assembling for aiding in blade aspiration pump, by being threaded mounting hole on connecting plate, and and appended claims, make rotation
Each parts of piece aspiration pump are assembled integrally, and the pump housing is packaged so that pumping pump configuration is more consolidated.
However, when being assembled using connecting plate auxiliary blade aspiration pump, the assembling perpendicularity between the pump housing and connecting plate, with
And assembling perpendicularity between connecting plate and motor is relatively low so that the assembly precision of aspiration pump is low, causes the friction of aspiration pump
Heating increase, can also make the air-tightness of the pump housing not good, the discharge stability of aspiration pump be influenceed, so as to influence the globality of aspiration pump
Energy.
Utility model content
The purpose of this utility model is to provide a kind of blade pumping pump frame, to solve existing blade aspiration pump in assembling
When, due to the problem that aspiration pump overall performance caused by the assembly precision of aspiration pump is low and air-tightness is not good is not enough.
According to embodiment of the present utility model, there is provided a kind of blade is evacuated pump frame, including base body；The base
Body is cylindrical structural；
The lower surface of the base body is provided with the groove of circle；
The bottom of the groove is provided with first boss and second boss；The first boss and the second boss respectively with
The side wall of the groove is fixedly connected；
The center of the bottom portion of groove is additionally provided with motor seal seat；The motor seal seat is circular tube structure；
Less than the first boss highly, the first boss is highly equal to described second to the height of the motor seal seat
The height of boss；
The base body is provided with motor shaft connecting hole and some motor connection holes；The axis of the motor shaft connecting hole
Axis with motor seal seat overlaps；
The motor shaft connection hole is provided with the first seal groove；
The upper surface of the base body is provided with the second seal groove of annular；
The motor shaft connecting hole, first seal groove and second seal groove concentric arrangement successively from inside to outside；
The motor shaft connecting hole, some motor connection holes and first seal groove are respectively positioned on second sealing
In the inner circle region of groove；
The upper surface of the base body is additionally provided with some equally distributed pump housing installation bases；The pump housing installation base
In the inner circle region of second seal groove.
Further, it is radially provided with inlet channel along the base body in the first boss；The inlet channel
One end run through the base body；In the second boss exhaust passage is radially provided with along the base body；The row
The base body is run through in one end of gas passage.
Further, the upper surface of the base body is additionally provided with air inlet and gas outlet；The air inlet with it is described enter
Gas passage is connected；The gas outlet is connected with the exhaust passage；The depth of the air inlet is less than the base body
Height；Height of the depth of the gas outlet less than the base body；The air inlet and the gas outlet are respectively positioned on institute
State in the inner circle region of the second seal groove.
Further, it is provided with the 3rd seal groove at the air inlet；3rd seal groove is located at second seal groove
Inner circle region in.
Further, the circumferential side wall of the base body is provided with the 3rd boss；The surface of the 3rd boss is provided with
Some threaded mounting holes.
Further, some pump housing installation bases are respectively equipped with pump housing connecting hole；The pump housing connecting hole runs through institute
State pump housing installation base and the base body.
Further, the base body is provided with three equally distributed pump cover connecting holes；The pump cover connecting hole with
Exradius of the distance of center circle of the motor shaft connecting hole more than second seal groove.
Further, interval angles of the first boss with the second boss along the circumferential direction are 180 °.
Further, interval angles of the 3rd boss with the first boss along the circumferential direction are 90 °；Described 3rd
Interval angles of the boss with the second boss along the circumferential direction are 90 °.
Further, the 3rd seal groove is connected with first seal groove.
From above technical scheme, the utility model provides a kind of blade and is evacuated pump frame, taken out for connecting blade
The pump housing and motor of air pump, are provided with first boss and second boss in the groove of base body lower surface, can improve motor with
Assembling perpendicularity between base body；The upper surface of base body is provided with some equally distributed pump housing installation bases, can be with
The assembling perpendicularity between the pump housing and base body of aspiration pump is improved, so as to improve the assembly precision of aspiration pump, friction is reduced
Heating.Additionally, by setting the first seal groove, the second seal groove and motor seal seat on base body, and coordinate corresponding close
Seal, is conducive to improving the sealing property and discharge stability of aspiration pump.Blade aspiration pump assembling when, using the utility model
The base of offer, can not only aid in the assembling of each parts of aspiration pump, can also improve the overall performance of aspiration pump.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is to be preferable to carry out the surface structure schematic diagram that a kind of blade for exemplifying is evacuated pump frame according to one；
Fig. 2 is to be evacuated the A-A of pump frame to sectional view according to an a kind of blade for being preferable to carry out exemplifying；
Fig. 3 is to be preferable to carry out the lower surface configuration schematic diagram that a kind of blade for exemplifying is evacuated pump frame according to one；
Fig. 4 is to be preferable to carry out the side view that a kind of blade for exemplifying is evacuated pump frame according to one.
In figure, 1- base bodies, 101- grooves, 102- first boss, 103- second boss, 104- inlet channels, 105-
Exhaust passage, 106- motor seals seat, 107- air inlets, 108- gas outlets, 109- motor shaft connecting holes, 110- motor connections
Hole, the seal grooves of 111- the 3rd, the seal grooves of 112- first, the seal grooves of 113- second, 114- pump housing installation bases, 115- the 3rd is convex
Platform, 116- threaded mounting holes, 117- pump housing connecting holes, 118- pump cover connecting holes.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clear, complete description, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
As Figure 1-Figure 4, the present embodiment provides a kind of blade pumping pump frame, the pump housing for connecting blade aspiration pump
And motor, including base body 1, base body 1 is cylindrical structural.
The lower surface of base body 1 is provided with the groove 101 of circle；The bottom of groove 101 is provided with first boss 102 and second
Boss 103；First boss 102 and second boss 103 are fixedly connected with the side wall of groove 101 respectively.
The center of the bottom of groove 101 is additionally provided with motor seal seat 106, and motor seal seat 106 is circular tube structure, is used for
Motor cabinet sealing ring is installed, being tightly connected between base body 1 and direct current generator is capable of achieving, is conducive to improving the stream of aspiration pump
Amount stability.
Base body 1 is provided with motor shaft connecting hole 109 and some motor connection holes 110；The axis of motor shaft connecting hole 109
Line overlaps with the axis of motor seal seat 106.The diameter with diameter greater than motor output shaft of motor shaft connecting hole 109, makes electricity
Machine output shaft can pass through base body 1, and be directly connected to the rotor in the pump housing of aspiration pump, and motor output shaft rotates
When, the rotor in the pump housing of a drive aspiration pump is rotated, and base body 1 is remained stationary.In the present embodiment, motor connection
The quantity in hole 110 can be chosen according to actual needs.
The height of motor seal seat 106 is equal to second boss 103 less than the height of first boss 102, the height of first boss 102
Height.When the lower surface of base body 1 installs direct current generator, motor output shaft passes through motor seal seat 106 and motor shaft
Connecting hole 109, root end face and the first boss 102 and second boss 103 of motor output shaft are brought into close contact, motor connection hole
110 coordinate with screw and nut, and direct current generator is fastenedly connected with base body 1.By rationally setting first boss 102 and the
The height tolerance and flatness tolerance of two boss 103, it is ensured that there is assembling higher to hang down between direct current generator and base body 1
Straight degree.
The first seal groove 112 is provided with motor shaft connecting hole 109, for installing motor Simmer ring；Base body 1 it is upper
Surface is additionally provided with the second seal groove 113 of annular, for installing pump cover sealing ring, realizes aspiration pump pump cover with base body 1
It is tightly connected.The base that the utility model is provided, can prevent gas from leaking, and improve blade aspiration pump integrally-built closed
Property, and then improve the discharge stability of aspiration pump.
In the present embodiment, motor shaft connecting hole 109, the first seal groove 112 and the second seal groove 113 are same successively from inside to outside
The heart is arranged；Motor shaft connecting hole 109, the seal groove 112 of some motor connection holes 110 and first are respectively positioned on the second seal groove 113
In inner circle region.
The upper surface of base body 1 is additionally provided with some equally distributed pump housing installation bases 114；Pump housing installation base 114
In the inner circle region of the second seal groove 113.When the pump housing of aspiration pump is installed in the upper surface of base body 1, under the pump housing
Surface is brought into close contact with some installation bases 114, public by the height tolerance and flatness that rationally set some installation bases 114
Difference, it is ensured that there is assembling perpendicularity higher between the pump housing and base body 1 of aspiration pump.In the present embodiment, the pump housing is installed
The quantity of boss 114 be three, three pump housing installation bases 114 are triangularly arranged, be conducive to improve aspiration pump the pump housing with
The Assembly stability of base body 1.It should be noted that the quantity of pump housing installation base 114 is not limited to the present embodiment offer
Quantity, can be chosen according to actual needs.
The blade pumping pump frame that the utility model is provided is vertical with the assembling of base body 1 by improving direct current generator
Degree, and the pump housing and the base body 1 of aspiration pump assembling perpendicularity, the integrally-built assembly precision of aspiration pump can be improved,
And then effectively reduce frictional heating.
Further, it is radially provided with inlet channel 104 along base body 1 in first boss 102；Inlet channel 104
Base body 1 is run through in one end, is easy to extraneous gas to flow into inlet channel 104.
Further, it is radially provided with exhaust passage 105 along base body 1 in second boss 103；Exhaust passage 105
Base body 1 is run through in one end, is easy to discharge gas by exhaust passage 105.
For ease of the inflow and discharge of gas, can distinguish at the inlet channel 104 of base body 1 and exhaust passage 105
Tapping thread, and air inlet valve is installed at inlet channel 104, outlet valve is installed at exhaust passage 105；During air inlet, gas
Body enters inlet channel 104 through air inlet valve；During exhaust, the gas of exhaust passage 105 is back to, is discharged by outlet valve and be evacuated
Pump.
For existing blade aspiration pump, inlet channel and exhaust passage are opened up on its stator, then need entering in stator
Tapping internal thread at gas passage and exhaust passage, to connect air inlet valve and outlet valve, this allow for the pump housing size and
Weight increases, and causes pump housing frictional heating big, and radiating is slow, influences the performance of aspiration pump.In the present embodiment, base body 1
The inlet channel 104 of upper setting and exhaust passage 105, can substitute the inlet channel in existing blade pumping pump stator and exhaust
Passage so that in the blade aspiration pump of the base provided using the utility model, the stator for undertaking Main Load and friction can be with
Significantly thinning loss of weight, moreover it is possible to which gas is let out caused by avoiding being connected with exhaust passage because of the inlet channel being arranged on stator
Leakage, and then frictional heating is effectively reduced, radiating rate is improved, improve the performance of aspiration pump.
Further, the upper surface of base body 1 is additionally provided with air inlet 107 and gas outlet 108；Air inlet 107 with enter
Gas passage 104 is connected；Air inlet 107 and gas outlet 108 are respectively positioned in the inner circle region of the second seal groove 113.Extraneous air
By inlet channel 104, enter in the pump housing of aspiration pump through air inlet 107, and gas is compressed by the pump chamber of the pump housing；Go out
Gas port 108 is connected with exhaust passage 105, and through the gas after overcompression in the confined space of pump cover, sealing is back to outlet
Mouth 108, and discharged gas by exhaust passage 105.The blade aspiration pump of the base for being provided using the utility model, base
Body 1 together constitutes the air flow path of uniqueness with the pump cover and the pump housing of aspiration pump, can increase gas flow area, so as to subtract
Small frictional heating, improves the radiating rate and extraction flow of the aspiration pump pump housing.
Wherein, the depth of air inlet 107 is less than the height of base body 1, and the depth of gas outlet 108 is less than base body
1 height, can avoid gases did escape so that the blade aspiration pump of the base provided using the utility model, with very
Good air-tightness, so as to improve the discharge stability of aspiration pump.
Further, the 3rd seal groove 111 is provided with air inlet 107, the 3rd seal groove 111 is located at the second seal groove 113
Inner circle region in, for installing air inlet sealing ring, can prevent gas from leaking, improve blade aspiration pump it is integrally-built close
Closing property, and then improve the discharge stability of aspiration pump.
Further, the circumferential side wall of base body 1 is provided with the 3rd boss 115, aspiration pump and atmospheric monitoring sampling instrument
Device is connected by the 3rd boss 115 of base body 1；The surface of the 3rd boss 115 is provided with some threaded mounting holes 116, makes
Base body 1 is fastenedly connected with atmospheric monitoring sampling instrument by screw-nut.Wherein, the quantity of threaded mounting hole 116
Two or four may be selected.
Further, some pump housing installation bases 114 are respectively equipped with pump housing connecting hole 117；Pump housing connecting hole 117 runs through pump
Body installation base 114 and base body 1.Pump housing connecting hole 117 coordinates with screw-nut, by the pump housing and base body of aspiration pump
1 is fastenedly connected, it is ensured that the structural stability of aspiration pump, and gas is circulated along set air flow path, so as to improve take out
Throughput, pumping efficiency and discharge stability, reduce frictional heating, and accelerate radiating.The quantity selection of pump housing connecting hole 117,
With reference to the quantity of pump housing installation base 114, will not be repeated here.
Further, base body 1 is provided with three equally distributed pump cover connecting holes 118；Pump cover connecting hole 118 and electricity
Exradius of the distance of center circle of arbor connecting hole 109 more than the second seal groove 113.Pump cover connecting hole 118 coordinates with screw-nut,
Aspiration pump pump cover is fastenedly connected with base body 1, is packaged for the pump housing to aspiration pump, make gas in the closed of pump cover
In space, sealing is back to the gas outlet 108 of base body 1, and by the excavationg pump of exhaust passage 105 outside.In the present embodiment, pump
The quantity of lid connecting hole 118 be three, three pump cover connecting holes 118 are triangularly arranged, be conducive to improve aspiration pump pump cover with
The Assembly stability of base body 1.It should be noted that the quantity of pump cover connecting hole 118 is not limited to the number of the present embodiment offer
Amount, can be chosen according to actual needs.
Further, first boss 102 and the interval angles along the circumferential direction of second boss 103 are 180 °, are conducive to increasing
Big extraction flow and gas flow area, reduce frictional heating, and improve the radiating rate of the aspiration pump pump housing.
Further, the 3rd boss 115 and the interval angles along the circumferential direction of first boss 102 are 90 °, the 3rd boss
115 is 90 ° with the interval angles along the circumferential direction of second boss 103, is easy to the installation of atmospheric monitoring sampling instrument.Additionally, entering
The mounting surface of gas passage 104, exhaust passage 105 and atmospheric monitoring sampling instrument, is parallel to each other between three so that atmospheric monitoring
Sampling instrument does not interfere with air inlet and the exhaust process of base body 1.
Further, the 3rd seal groove 111 is connected with the first seal groove 112, and such connection design can simplify machine
Tool processing technology, is easy to the installation of air inlet mouth sealing ring and motor Simmer ring, is conducive to preventing gas from leaking, and improves blade and takes out
The integrally-built seal of air pump, and then improve the discharge stability of aspiration pump.
From above technical scheme, the utility model provides a kind of blade and is evacuated pump frame, taken out for connecting blade
First boss 102 and second boss 103 are provided with the pump housing and motor of air pump, the groove 101 of the lower surface of base body 1, can be with
Improve the assembling perpendicularity between motor and base body 1；The upper surface of base body 1 is provided with some equally distributed pump housing peaces
Dress boss 114, can improve the assembling perpendicularity between the pump housing of aspiration pump and base body 1, so as to improve the dress of aspiration pump
With precision, frictional heating is reduced.Additionally, by setting the first seal groove 112, the second seal groove 113 and motor on base body 1
Seal receptacle 106, and coordinate corresponding sealing ring, be conducive to improving the sealing property and discharge stability of aspiration pump.Blade is evacuated
In assembling, the base provided using the utility model can not only aid in the assembling of each parts of aspiration pump to pump, can also carry
The overall performance of aspiration pump high.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein
Other new embodiments.The application is intended to any modification of the present utility model, purposes or adaptations, these
Modification, purposes or adaptations follow general principle of the present utility model and including undocumented skill of the utility model
Common knowledge or conventional techniques in art field.Description and embodiments be considered only as it is exemplary, it is of the present utility model
True scope and spirit are pointed out by appended claim.
It should be appreciated that the utility model is not limited to the accurate knot for being described above and being shown in the drawings
Structure, and can without departing from the scope carry out various modifications and changes.Scope of the present utility model only will by appended right
Ask to limit.
Claims (10)
1. a kind of blade is evacuated pump frame, it is characterised in that including base body (1), and the base body (1) is that cylinder is tied
Structure；
The lower surface of the base body (1) is provided with the groove (101) of circle；
The bottom of the groove (101) is provided with first boss (102) and second boss (103)；The first boss (102) and institute
Side wall of the second boss (103) respectively with the groove (101) is stated to be fixedly connected；
The center of groove (101) bottom is additionally provided with motor seal seat (106)；Motor seal seat (106) is circle
Tubular construction；
The height of motor seal seat (106) is less than the first boss (102) height, first boss (102) height
Equal to the height of the second boss (103)；
The base body (1) is provided with motor shaft connecting hole (109) and some motor connection holes (110)；The motor shaft connection
The axis in hole (109) overlaps with the axis of motor seal seat (106)；
Motor shaft connecting hole (109) place is provided with the first seal groove (112)；
The upper surface of the base body (1) is provided with second seal groove (113) of annular；
The motor shaft connecting hole (109), first seal groove (112) and second seal groove (113) from inside to outside according to
Secondary concentric arrangement；
The motor shaft connecting hole (109), some motor connection holes (110) and first seal groove (112) are respectively positioned on
In the inner circle region of second seal groove (113)；
The upper surface of the base body (1) is additionally provided with some equally distributed pump housing installation bases (114)；The pump housing is installed
Boss (114) is in the inner circle region of second seal groove (113).
2. blade according to claim 1 is evacuated pump frame, it is characterised in that along described in the first boss (102)
Base body (1) is radially provided with inlet channel (104)；The base body is run through in one end of the inlet channel (104)
(1)；
In the second boss (103) exhaust passage (105) is radially provided with along the base body (1)；The exhaust passage
(105) base body (1) is run through in one end.
3. blade according to claim 2 is evacuated pump frame, it is characterised in that the upper surface of the base body (1) is also
It is provided with air inlet (107) and gas outlet (108)；The air inlet (107) is connected with the inlet channel (104)；It is described go out
Gas port (108) is connected with the exhaust passage (105)；The depth of the air inlet (107) is less than the base body (1)
Highly；Height of the depth of the gas outlet (108) less than the base body (1)；The air inlet (107) and the outlet
Mouth (108) is respectively positioned in the inner circle region of second seal groove (113).
4. blade according to claim 3 is evacuated pump frame, it is characterised in that air inlet (107) place is provided with the 3rd
Seal groove (111)；3rd seal groove (111) is in the inner circle region of second seal groove (113).
5. blade according to claim 1 is evacuated pump frame, it is characterised in that the circumferential side wall of the base body (1)
It is provided with the 3rd boss (115)；The surface of the 3rd boss (115) is provided with some threaded mounting holes (116).
6. blade according to claim 1 is evacuated pump frame, it is characterised in that some pump housing installation bases (114)
It is respectively equipped with pump housing connecting hole (117)；The pump housing connecting hole (117) is through the pump housing installation base (114) and the bottom
Seat body (1).
7. blade according to claim 1 is evacuated pump frame, it is characterised in that the base body (1) is provided with three
Equally distributed pump cover connecting hole (118)；The distance of center circle of the pump cover connecting hole (118) and the motor shaft connecting hole (109)
More than the exradius of second seal groove (113).
8. blade according to claim 5 pumping pump frame, it is characterised in that the first boss (102) and described the
Two boss (103) interval angles along the circumferential direction are 180 °.
9. blade according to claim 8 pumping pump frame, it is characterised in that the 3rd boss (115) and described the
One boss (102) interval angles along the circumferential direction are 90 °；3rd boss (115) is with the second boss (103) along circle
The interval angles of circumferential direction are 90 °.
10. blade according to claim 4 pumping pump frame, it is characterised in that the 3rd seal groove (111) with it is described
First seal groove (112) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621456298.8U CN206309600U (en) | 2016-12-28 | 2016-12-28 | A kind of blade is evacuated pump frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621456298.8U CN206309600U (en) | 2016-12-28 | 2016-12-28 | A kind of blade is evacuated pump frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309600U true CN206309600U (en) | 2017-07-07 |
Family
ID=59247499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621456298.8U Expired - Fee Related CN206309600U (en) | 2016-12-28 | 2016-12-28 | A kind of blade is evacuated pump frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309600U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575388A (en) * | 2017-08-30 | 2018-01-12 | 重庆工商大学 | A kind of blade electronics is evacuated pump frame |
| CN109296532A (en) * | 2018-12-14 | 2019-02-01 | 重庆工商大学 | Blade electronics aspiration pump |
| CN109882410A (en) * | 2019-04-12 | 2019-06-14 | 重庆工商大学 | A kind of blade electronics aspiration pump |
-
2016
- 2016-12-28 CN CN201621456298.8U patent/CN206309600U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575388A (en) * | 2017-08-30 | 2018-01-12 | 重庆工商大学 | A kind of blade electronics is evacuated pump frame |
| CN109296532A (en) * | 2018-12-14 | 2019-02-01 | 重庆工商大学 | Blade electronics aspiration pump |
| CN109296532B (en) * | 2018-12-14 | 2024-01-26 | 重庆工商大学 | Electronic air pump with rotary vane |
| CN109882410A (en) * | 2019-04-12 | 2019-06-14 | 重庆工商大学 | A kind of blade electronics aspiration pump |
| CN109882410B (en) * | 2019-04-12 | 2024-01-30 | 重庆工商大学 | Electronic air pump with rotary vane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20181228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |