CN202194809U - Shake-proof and deformation resistant assembling structure for pump connection base and balance wheel base - Google Patents
Shake-proof and deformation resistant assembling structure for pump connection base and balance wheel base Download PDFInfo
- Publication number
- CN202194809U CN202194809U CN2011203369378U CN201120336937U CN202194809U CN 202194809 U CN202194809 U CN 202194809U CN 2011203369378 U CN2011203369378 U CN 2011203369378U CN 201120336937 U CN201120336937 U CN 201120336937U CN 202194809 U CN202194809 U CN 202194809U
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- bearing
- pressing plate
- axially locating
- connecting base
- pump connecting
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Abstract
The utility model discloses a shake-proof and deformation resistant assembling structure for a pump connection base and a balance wheel base, which comprises the pump connection base embedded with a first bearing and the balance wheel base embedded with a second bearing. The first bearing is installed in a bearing chamber cavity of the pump connection base, and a first shake-proof and deformation resistant assembly is cushioned between the bottom lateral face of an outer ring of the first bearing and a top pressing face of an annular boss of the bearing chamber cavity in matched mode. The second bearing is installed in a balance wheel bearing chamber of the balance wheel base, and a second shake-proof and deformation resistant assembly is cushioned between the top lateral face of the outer ring of the second bearing and a top pressing face of a limit boss of the balance wheel bearing chamber cavity in matched mode. The first shake-proof and deformation resistant assembly and the second shake-proof and deformation resistant assembly disperse alternately changing axial pressure and radial pressure in a bearing point area evenly on the integral top pressing faces of the annular boss and the limit boss. The shake-proof and deformation resistant assembling structure is simple in assembling, stable in matched stack and low in cost, can effectively overcome shortcomings of insufficient compression resistance of plastic products, improves product performance, eliminates product abnormal sound and noise and prolongs service life of the products.
Description
Technical field
The utility model relates to the composite structure of the pump connecting base and the escapement seat of the technical field of a kind of reverse osmosis system with diaphragm pump, particularly diaphragm pump, the antivibration resistance to deformation assembly structure of specifically a kind of pump connecting base and escapement seat.
Background technique
Diaphragm pump is mainly used in the clean water treatment; Rotor output shaft in the diaphragm pump passes the pump connecting base and is fixedly connected with eccentric bushing; Wobbler action when being rotated by eccentric bushing promotes the escapement seat and does the axial runout of circumference formula; Thereby realize the to-and-fro motion of piston through the swing of escapement seat, and then do the suction campaign and play pressurized effect.In Reverse Osmosis Technology was purified waste water the water purification machine of handling, diaphragm pump was influenced by film and waste water not only will in pure water machine system than the pressure surge that produces because of quality good or not, also can receive the impact of water source pressure of supply water stability simultaneously.The pump connecting base of diaphragm pump and escapement seat generally all adopt plastic product to process, and all are fitted with bearing in the bearing chamber of pump connecting base and escapement seat.Bearing when the rotor output shaft rotates in diaphragm pump pump connecting base and the escapement seat is receiving axially and under the impact of radially alternating pressure to add the heat that upper bearing (metal) produces in the running for a long time; The bearing chamber that working of plastics is made is because of the plastics self-characteristic; And cause the bearing chamber internal diameter to have than obvious variation; Thereby lose the fastening effect to bearing, cause diaphragm pump to produce abnormal sound and noise, serious meeting influences diaphragm pump using effect and the working life that shortens diaphragm pump.Like the patent No. is that just to disclose a kind of diaphragm pump motor and the patent No. be that 20062014148282.0 the applicant's Chinese invention patent just discloses a kind of diaphragm pump escapement for 200620148281.6 the applicant's Chinese invention patent; Just disclose in these two patents a kind of technological scheme of reinforcing Bearing Installation is arranged; Its increase has bearing cover; The employing bearing cover covers bearing and is lived by screw; But this method has just been done certain improvement to the means of fixation of bearing, but does not fundamentally solve diaphragm pump in this case and quality problems such as the pressure that produces descends, noise is big, is seriously influencing the whole quality level of a water purification machine.
Summary of the invention
The utility model technical problem to be solved is to above-mentioned existing technology present situation; Can reduce the product noise and provide; Improve product working life, strengthen component wear resistance and a kind of pump connecting base of impact resistance and the antivibration resistance to deformation assembly structure of escapement seat, it is easy for installation; Assembly is stable, and is with low cost and can effectively remedy plastic article resistance to compression defect of insufficient.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: the antivibration resistance to deformation assembly structure of a kind of pump connecting base and escapement seat; Comprise pump connecting base that fixedly is nested with clutch shaft bearing and the escapement seat that is nested with second bearing; The inner ring drive fit of second bearing is equipped with eccentric bushing; Clutch shaft bearing is installed in the bearing chamber cavity that the pump connecting base is shaped on; The bearing chamber cavity is shaped on the annular boss that cooperates with clutch shaft bearing outer ring bottom side roof pressure location, and pad is furnished with the first antivibration resistance to deformation assembly between the roof pressure face of clutch shaft bearing outer ring bottom side and annular boss; Second Bearing Installation is in the escapement bearing chamber that the escapement seat is shaped on; Escapement bearing chamber bottom is shaped on the positive stop lug boss that cooperates with the second bearing outer ring top side face roof pressure, and pad is furnished with the second antivibration resistance to deformation assembly between the outer ring top side face of second bearing and the roof pressure face of positive stop lug boss; Axial and the radial pressure that the first antivibration resistance to deformation assembly and the second antivibration resistance to deformation assembly are put regional checker with bearing is evenly dispersed on the whole roof pressure face of annular boss and positive stop lug boss.
For optimizing technique scheme, the concrete measure of taking also comprises:
The first above-mentioned antivibration resistance to deformation assembly and the second antivibration resistance to deformation assembly are formed by a slice antivibration resistance to deformation tinsel at least.
The outer ring top side face of above-mentioned clutch shaft bearing has been press-fitted the first axially locating pressing plate, and the first axially locating pressing plate matches with the pump connecting base clutch shaft bearing pin is fitted in the bearing chamber cavity of pump connecting base; The outer ring bottom side of second bearing is fixedly joined and is pressed with the second axially locating pressing plate, and the second axially locating pressing plate matches with the escapement seat second bearing fixing lock is fitted in the escapement bearing chamber of escapement seat.
The second above-mentioned axially locating pressing plate is a cirque structure; And the internal diameter size of the internal diameter size of the second axially locating pressing plate and the second bearing outer ring side is suitable; It is prominent that the even cloth in the cylindrical border of the second axially locating pressing plate is shaped on the second circular ear, and it is equipped mutually with the screw screw-tightened that the escapement seat is shaped on that the second axially locating pressing plate passes the prominent through hole of the prominent ear of the second circular ear through screw.
The first above-mentioned axially locating pressing plate is a cirque structure, and the internal diameter size of the internal diameter size of the first axially locating pressing plate and side, clutch shaft bearing outer ring is suitable, and it is prominent that the even cloth in the cylindrical border of the first axially locating pressing plate is shaped on the first circular ear; It is equipped mutually with the mounting hole screw-tightened that the pump connecting base is shaped on that the first axially locating pressing plate passes the prominent through hole of the prominent ear of the first circular ear through screw.
The first above-mentioned circular ear prominent with the prominent cone boss that all is shaped on the prominent through hole of ring ear of the second circular ear, the mounting hole of the screw of escapement seat and pump connecting base all expands and is shaped on the location reaming of holding cone boss.
Be suppressed with on the anchor ring of the first above-mentioned axially locating pressing plate with the first axially locating pressing plate concentric be used to cooperate the stepped annular projection that compresses clutch shaft bearing.
Be suppressed with on the anchor ring of the second above-mentioned axially locating pressing plate with the second axially locating pressing plate concentric be used to cooperate the stepped annular projection that compresses second bearing.
It is prominent that the first above-mentioned axially locating pressing plate is shaped on three first circular ears, and the two adjacent first circular ears prominent between at a distance of 120 degree; It is prominent that the said second axially locating pressing plate is shaped on three second circular ears, and the two adjacent second circular ears prominent between at a distance of 120 degree.
The inner ring of above-mentioned clutch shaft bearing is all joined with the motor output shaft adapter sleeve with the eccentric opening that eccentric bushing is shaped on and is connected.
Compared with prior art; All fill up between pump connecting base of the utility model and escapement seat and clutch shaft bearing and second bearing antivibration resistance to deformation tinsel is housed; Antivibration resistance to deformation tinsel can effectively be alleviated bearing circumference each point zone when alternately bearing axial and radial pressure; The impact that the escapement bearing chamber axial limiting boss of pump connecting base bearing chamber cavity annular boss and escapement seat is caused; Antivibration resistance to deformation tinsel can increase the pump connecting base that plastics process and the pressurized zone area of escapement seat greatly, reduces the wearing and tearing of pressurized zone face, thereby avoids pump connecting base and escapement seat to produce the danger of permanent deformation because of the pressure that receives the regional continuous conversion of circumferential point for a long time.The utility model assembling is simple, and combinative stability is with low cost, and the cooperation through antivibration resistance to deformation tinsel and axially locating pressing plate has guaranteed bearing fixing, can effectively eliminate product because of the long-term noise that uses generation, the working life of raising product.
Description of drawings
Fig. 1 is the utility model assembling decomposition texture schematic representation;
Fig. 2 is the sectional structure chart of escapement seat among Fig. 1;
Fig. 3 is the structural representation that the diaphragm pump of the utility model is installed.
Embodiment
Embodiment to the utility model describes in further detail below in conjunction with accompanying drawing.
Fig. 1 is extremely shown in Figure 2 to be the structural representation of the utility model.
Reference character wherein is: pump connecting base 1, bearing chamber cavity 1a, mounting hole 1b, annular boss 11, escapement seat 2, escapement bearing chamber 2a, screw 2b, positive stop lug boss 21, clutch shaft bearing 31, second bearing 32, the first antivibration resistance to deformation assembly 41, the second antivibration resistance to deformation assembly 42, cone boss 5a, prominent 511, the second axially locating pressing plate, 52, the second circular ear of the first axially locating pressing plate, 51, the first circular ear are prominent 521, eccentric bushing 6, motor output shaft 7.
Extremely shown in Figure 3 like Fig. 1; A kind of pump connecting base of the utility model and the antivibration resistance to deformation assembly structure of escapement seat; Comprise pump connecting base 1 that fixedly is nested with clutch shaft bearing 31 and the escapement seat 2 that is nested with second bearing 32; The inner ring drive fit of second bearing 32 is equipped with eccentric bushing 6; Its clutch shaft bearing 31 is installed among the bearing chamber cavity 1a that pump connecting base 1 is shaped on, and bearing chamber cavity 1a is shaped on the annular boss 11 that cooperates with bottom side roof pressures location, clutch shaft bearing 31 outer ring, fills up between the roof pressure face of clutch shaft bearing 31 outer ring bottom sides and annular boss 11 and is furnished with the first antivibration resistance to deformation assembly 41; Second bearing 32 is installed among the escapement bearing chamber 2a that escapement seat 2 is shaped on; Escapement bearing chamber 2a bottom is shaped on to fill up between the roof pressure face of outer ring top side face and positive stop lug boss 21 of positive stop lug boss 21, the second bearings 32 that cooperate with second bearing, 32 outer ring top side face roof pressures is furnished with the second antivibration resistance to deformation assembly 42; Axial and the radial pressure that the first antivibration resistance to deformation assembly 41 and the second antivibration resistance to deformation assembly 42 are put regional checker with bearing is evenly dispersed on the whole roof pressure face of annular boss 11 and positive stop lug boss 21.In the existing technology; Pump connecting base 1 all adopts plastic product to process with escapement seat 2, and plastic product is because the material behavior of self has resistance to compression resistance to deformation deficiency, thereby the pump connecting base 1 of existing technology septation pump and the bearing in the escapement seat 2; Receive for a long time at bearing under the impact of axial and radially alternating conversion pressure; Can make pump connecting base 1 and escapement seat 2 lose fixation, thereby make diaphragm pump produce abnormal sound and noise, the serious working life that also can influence diaphragm pump bearing.The utility model is in the escapement bearing chamber 2a of the bearing chamber cavity 1a of pump connecting base 1 and escapement seat; Through and the roof pressure face of bearing between the antivibration resistance to deformation assembly that is provided with; The pressure in the circumferential point zone that annular boss 11 and positive stop lug boss 21 bear is distributed on the whole pressure-bearing surface, effectively improved crushing resistance and the wear resistance of bearing chamber cavity 1a, escapement bearing chamber 2a, solved the not enough characteristic of resistance to compression in the plastic article; Reduce the noise of product, the usability of the product that further improves.The utility model assembly is stable, and is simple in structure, with low cost, easy for installation, improved performance of products greatly, improved the competitiveness of product in market.
The first antivibration resistance to deformation assembly 41 of the utility model and the second antivibration resistance to deformation assembly 42 are formed by a slice antivibration resistance to deformation tinsel at least.It is fixed that antivibration resistance to deformation tinsel will come according to the degree of depth of bearings mounted height and bearing chamber, can adopt the stacked mode of antivibration resistance to deformation tinsel of a plurality of different-thickness.
For better with bearing fixing; The outer ring top side face of the clutch shaft bearing 31 of the utility model has been press-fitted the first axially locating pressing plate, 51, the first axially locating pressing plates 51 and has matched with pump connecting base 1 clutch shaft bearing 31 pin are fitted among the bearing chamber cavity 1a of pump connecting base 1; The outer ring bottom side of second bearing 32 is fixedly joined and is pressed with the second axially locating pressing plate, 52, the second axially locating pressing plates 52 and matches with escapement seat 2 second bearing, 32 pin are fitted among the escapement bearing chamber 2a of escapement seat 2.
As shown in Figure 1; The second axially locating pressing plate 52 of the utility model is a cirque structure; And the internal diameter size of the internal diameter size of the second axially locating pressing plate 52 and side, second bearing, 32 outer ring is suitable; It is equipped mutually with the screw 2b screw-tightened that escapement seat 2 is shaped on through the prominent through hole of ear that screw passes the second circular ear prominent 521 that the even cloth in the cylindrical border of the second axially locating pressing plate 52 is shaped on prominent 521, the second axially locating pressing plates 52 of the second circular ear.Escapement seat 2 is shaped on screw 2b, and the second axially locating pressing plate 52 compresses second bearing 32 through screw and screw 2b screw fit and is installed among the escapement bearing chamber 2a, and installation pretightening force is controlled at about pretightening force scope 200-600N that general bearing all can bear.
Among the embodiment; The first axially locating pressing plate 51 is a cirque structure; And the internal diameter size of the internal diameter size of the first axially locating pressing plate 51 and side, clutch shaft bearing 31 outer ring is suitable, and the even cloth in the cylindrical border of the first axially locating pressing plate 51 is shaped on the first circular ear prominent 511; The first axially locating pressing plate 51 is equipped mutually with the mounting hole 1b screw-tightened that pump connecting base 1 is shaped on through the prominent through hole of ear that screw passes the first circular ear prominent 511.The first axially locating pressing plate 51 cooperates with mounting hole 1b clutch shaft bearing 31 compressed through screw and is installed among the pump connecting base 1 bearing chamber cavity 1a, and its installation pretightening force also will be controlled at about 200-600N.
Prominent 511 and the second circular ear of the first circular ear of the utility model prominent 521 all is shaped on the dash forward cone boss 5a of through hole of ring ear, and the screw 2b of escapement seat 2 and the mounting hole 1b of pump connecting base 1 all expand and be shaped on the location reaming of holding cone boss 5a.Be shaped on cone boss 5a and can make the axially locating pressing plate self have positioning action, guarantee axially locating pressing plate ability quick mounting and prevent circumferential rotation.
Be suppressed with on the anchor ring of the first axially locating pressing plate 51 of the utility model with the first axially locating pressing plate, 51 concentrics be used to cooperate the stepped annular projection that compresses clutch shaft bearing 31.Be suppressed with on the anchor ring of the second axially locating pressing plate 52 with the second axially locating pressing plate, 52 concentrics be used to cooperate the stepped annular projection that compresses second bearing 32.The axially locating slab integral is stepped, can cooperate better to compress bearing, and the annular projection part highly is less than or equals the outstanding height of bearing, guarantees that it fully fastens bearing fixing.
The first axially locating pressing plate 51 of the utility model is shaped on three first circular ears and dashes forward 511, and the two first adjacent circular ears are dashed forward 511 at a distance of 120 degree; The second axially locating pressing plate 52 is shaped on three second circular ears and dashes forward 521, and the two second adjacent circular ears are dashed forward 521 at a distance of 120 degree.
The inner ring of the clutch shaft bearing 31 of the utility model is all joined with motor output shaft 7 adapter sleeves with the eccentric opening that eccentric bushing 6 is shaped on and is connected.
Fig. 3 is the diaphragm pump that model utility is installed; Visible among the figure; Motor output shaft 7 and clutch shaft bearing inner ring are fixedly connected with eccentric bushing in second bearing, and motor output shaft 7 promotes the swing of escapement seat through eccentric bushing, thereby realizes the to-and-fro motion of piston through the swing of escapement seat; And then do the suction campaign and play pressurized effect, realize the work of diaphragm pump.Because the wobbler action of eccentric bushing; Make the clutch shaft bearing and second bearing bear the axial and radial pressure of alternation in operation process middle (center) bearing circumference each point zone, cause pump connecting base and escapement seat to lose the fastening effect to bearing easily, the utility model is fitted with antivibration resistance to deformation assembly; Can make diaphragm pump have higher workmanship; Reduce the noise abnormal sound, it is low to improve product practicability and its installation cost, and the assembly stabilization energy effectively remedies plastic article resistance to compression defect of insufficient.
The most preferred embodiment of the utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of the utility model.
Claims (10)
1. the antivibration resistance to deformation assembly structure of pump connecting base and escapement seat; Comprise pump connecting base (1) that fixedly is nested with clutch shaft bearing (31) and the escapement seat (2) that is nested with second bearing (32); The inner ring drive fit of said second bearing (32) is equipped with eccentric bushing (6); It is characterized in that: described clutch shaft bearing (31) is installed in the bearing chamber cavity (1a) that pump connecting base (1) is shaped on; Bearing chamber cavity (1a) is shaped on the annular boss (11) that cooperates with clutch shaft bearing (31) outer ring bottom side roof pressure location, and pad is furnished with the first antivibration resistance to deformation assembly (41) between the roof pressure face of said clutch shaft bearing (31) outer ring bottom side and annular boss (11); Said second bearing (32) is installed in the escapement bearing chamber (2a) that escapement seat (2) is shaped on; Escapement bearing chamber (2a) bottom is shaped on the positive stop lug boss (21) that cooperates with second bearing (32) outer ring top side face roof pressure, and pad is furnished with the second antivibration resistance to deformation assembly (42) between the roof pressure face of the outer ring top side face of said second bearing (32) and positive stop lug boss (21).
2. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 1 and escapement seat is characterized in that: the described first antivibration resistance to deformation assembly (41) and the second antivibration resistance to deformation assembly (42) are formed by a slice antivibration resistance to deformation tinsel at least.
3. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 1 and escapement seat; It is characterized in that: the outer ring top side face of described clutch shaft bearing (31) has been press-fitted the first axially locating pressing plate (51), and the first axially locating pressing plate (51) matches with pump connecting base (1) clutch shaft bearing (31) pin is fitted in the bearing chamber cavity (1a) of pump connecting base (1); The outer ring bottom side of said second bearing (32) is fixedly joined and is pressed with the second axially locating pressing plate (52), and the second axially locating pressing plate (52) matches with escapement seat (2) second bearing (32) pin is fitted in the escapement bearing chamber (2a) of escapement seat (2).
4. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 3 and escapement seat; It is characterized in that: the described second axially locating pressing plate (52) is a cirque structure; And the internal diameter size of the internal diameter size of the second axially locating pressing plate (52) and second bearing (32) side, outer ring is suitable; The even cloth in the cylindrical border of the second axially locating pressing plate (52) is shaped on the second circular ear prominent (521), and the said second axially locating pressing plate (52) is equipped mutually with screw (2b) screw-tightened that escapement seat (2) is shaped on through the prominent through hole of ear that screw passes the second circular ear prominent (521).
5. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 4 and escapement seat; It is characterized in that: the described first axially locating pressing plate (51) is a cirque structure; And the internal diameter size of the internal diameter size of the first axially locating pressing plate (51) and clutch shaft bearing (31) side, outer ring is suitable, and the even cloth in the cylindrical border of the first axially locating pressing plate (51) is shaped on the first circular ear prominent (511); The said first axially locating pressing plate (51) is equipped mutually with mounting hole (1b) screw-tightened that pump connecting base (1) is shaped on through the prominent through hole of ear that screw passes the first circular ear prominent (511).
6. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 5 and escapement seat; It is characterized in that: the described first circular ear prominent (511) and the second circular ear prominent (521) all are shaped on the dash forward cone boss (5a) of through hole of ring ear, and the screw (2b) of said escapement seat (2) and the mounting hole (1b) of pump connecting base (1) all expand and be shaped on the location reaming of holding cone boss (5a).
7. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 6 and escapement seat is characterized in that: be suppressed with on the anchor ring of the described first axially locating pressing plate (51) with the first axially locating pressing plate concentric be used to cooperate the stepped annular projection that compresses clutch shaft bearing (31).
8. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 7 and escapement seat is characterized in that: be suppressed with on the anchor ring of the described second axially locating pressing plate (52) with the second axially locating pressing plate concentric be used to cooperate the stepped annular projection that compresses second bearing (32).
9. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 3 and escapement seat; It is characterized in that: the described first axially locating pressing plate (51) is shaped on three first circular ears prominent (511), and the two first adjacent circular ears are dashed forward between (511) at a distance of 120 degree; The said second axially locating pressing plate (52) is shaped on three second circular ears prominent (521), and the two second adjacent circular ears are dashed forward between (521) at a distance of 120 degree.
10. the antivibration resistance to deformation assembly structure of a kind of pump connecting base according to claim 3 and escapement seat is characterized in that: the inner ring of described clutch shaft bearing (31) is all joined with motor output shaft (7) adapter sleeve with the eccentric opening that eccentric bushing (6) is shaped on and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203369378U CN202194809U (en) | 2011-09-09 | 2011-09-09 | Shake-proof and deformation resistant assembling structure for pump connection base and balance wheel base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203369378U CN202194809U (en) | 2011-09-09 | 2011-09-09 | Shake-proof and deformation resistant assembling structure for pump connection base and balance wheel base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202194809U true CN202194809U (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203369378U Expired - Lifetime CN202194809U (en) | 2011-09-09 | 2011-09-09 | Shake-proof and deformation resistant assembling structure for pump connection base and balance wheel base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202194809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312821A (en) * | 2011-09-09 | 2012-01-11 | 宁波强生电机有限公司 | Shock and deformation resistant assembly structure of pump connection base and balance wheel base |
| CN104564620A (en) * | 2014-12-14 | 2015-04-29 | 曾宪雄 | Raised tri-wheel assembly of diaphragm pump |
-
2011
- 2011-09-09 CN CN2011203369378U patent/CN202194809U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312821A (en) * | 2011-09-09 | 2012-01-11 | 宁波强生电机有限公司 | Shock and deformation resistant assembly structure of pump connection base and balance wheel base |
| CN102312821B (en) * | 2011-09-09 | 2013-05-08 | 宁波强生电机有限公司 | Shock and deformation resistant assembly structure of pump connection base and balance wheel base |
| CN104564620A (en) * | 2014-12-14 | 2015-04-29 | 曾宪雄 | Raised tri-wheel assembly of diaphragm pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120418 |
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| CX01 | Expiry of patent term |