CN204433338U - A kind of cylinder assembly and the emulsion pumps comprising this assembly - Google Patents
A kind of cylinder assembly and the emulsion pumps comprising this assembly Download PDFInfo
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- CN204433338U CN204433338U CN201420790551.8U CN201420790551U CN204433338U CN 204433338 U CN204433338 U CN 204433338U CN 201420790551 U CN201420790551 U CN 201420790551U CN 204433338 U CN204433338 U CN 204433338U
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Abstract
The utility model relates to a kind of cylinder assembly and comprises the emulsion pumps of this assembly, and cylinder assembly wherein, comprises principal post and piston; Principal post lower end is provided with annular piston positioning groove, and the medial surface of piston positioning groove is provided with at least one flange; Piston is tubular, and its outer wall shape, inner wall shape are suitable with the lateral surface of piston positioning groove, medial surface shape respectively, and piston inner wall is provided with second suitable groove of at least one and flange; Piston embeds in piston positioning groove, and flange and the second groove are fixed, and ring-side wall interference fit in piston side wall and piston positioning groove.Piston and principal post are fixed, and add interference fit, ensure that the fastness of the connection of piston and principal post.The split-type structural of piston and principal post, is conducive to piston employing and makes the material of good environmental adaptability, ensure the stable performance of cylinder assembly.
Description
[technical field]
The utility model relates to daily use chemicals and field of medicaments, is specifically related to a kind of cylinder assembly and the emulsion pumps with this assembly.
[background technology]
The modal piston fixed form of existing emulsion pumps, rely on the subpost of piston both sides and the button bit of principal post to carry out interference fit, realize spacing to piston, need the less free-running fit in gap or transition fit to realize relative motion between piston and principal post, also seal request is had between subpost end and the pump housing between piston and subpost and when locking by mouth, therefore, these matching parts not only tolerance fit require high, packaging technology is more complicated, and there is following problem: 1) principal post coordinates with subpost and too tight or too loosely causes seizure of piston or come off; 2) excessive clearance or too smallly cause the movable difficulty of product poor sealing or piston between principal post and piston, hydraulic fluid difficulty or the requirement of liquid outlet quantity out of reach, 3) principal post and subpost are combined by button bit, because of size or assembling reason, if axial precision is inadequate after assembling, the sealing property between subpost and the pump housing will be affected.These problems all will directly affect the normal pump liquid function of emulsion pumps, be all the difficult points of emulsion pumps quality control all the time.
The emulsion pumps of existing another kind of structure, see patent CN202295704U, name is called " a kind of principal post and the integrated emulsion pumps of piston ", although improve part to coordinate and easy produced problem in assembling, but because integrated injection molding is shaped, piston and principal post use same PP material, piston elasticity is not enough, between its outside face and pump housing inwall, the sealing effectiveness of interference fit is very large by the influence of temperature change of natural environment and environment for use, especially emulsion pumps suction is very easily produced at low ambient temperatures not or the pump liquid measure not having suction to cause is few or can not the situation of pump liquid, this structure only can as a kind of solution reducing injection moulding and assembly cost.
[summary of the invention]
In view of this, the utility model provides a kind of cylinder assembly of structural development.
The utility model adopts following technical scheme, and structure cylinder assembly, comprises principal post and piston; Principal post lower end is provided with annular piston positioning groove, and the medial surface of piston positioning groove is provided with at least one flange; Piston is tubular, and its outer wall shape, inner wall shape are suitable with the lateral surface of piston positioning groove, medial surface shape respectively, and piston inner wall is provided with second suitable groove of at least one and flange; Piston embeds in piston positioning groove, and flange and the second groove are fixed, and ring-side wall interference fit in piston side wall and piston positioning groove.
Preferably, described piston comprises inner core and urceolus, and outer tube outer surface is indent arc; Inner core is located at urceolus top, and its outer wall is connected by horizontal endless fin with outer tube inner wall; Outer tube inner wall, inner tank theca and fin upper surface surround wedge shape the 3rd groove being formed and reduce from top to bottom to arrange; Described principal post piston positioning groove lateral wall is located in the 3rd groove.
Preferably, described piston Low Density Polyethylene is made.
The utility model also provides a kind of emulsion pumps with above-mentioned cylinder assembly, described principal post in a tubular form, comprises coaxial top tube and down tube, and lower pipe outer wall is provided with tubular-baffle, baffle plate is connected with lower pipe outer wall by horizontal cover plate, and the outer wall of lower pipe below cover plate is provided with at least one flange; Baffle plate, cover plate and the lower pipe tube wall below cover plate surrounds and forms piston positioning groove.
Preferably, it also comprises by mouth, the first glass bead, spring, seal receptacle, the pump housing and the second glass bead; Comprise cross bar and vertical pole by mouth, be provided with by mouth inside the liquid outlet channel running through crossbar end and vertical pole end, vertical pole upper end is provided with the first dividing plate of blowing-by liquid outlet channel; Described upper pipe lower end is provided with the first glass bead containing cavity, and the first glass bead containing cavity lower end port diameter is less than the diameter of the first glass bead, and the first glass bead is located in the first glass bead containing cavity, can by the first glass bead containing cavity lower end port and the first dividing plate spacing; Pump housing upper and lower opening, is provided with piston containing cavity from top to bottom successively, the second glass bead containing cavity, feed pathway; Piston containing cavity is cylindrical, in the diameter of the second glass bead under the second glass bead containing cavity lower end port diameter; Seal receptacle sidewall shape and the inner wall shape of piston urceolus below fin suitable, lower surface is provided with the annular backup pad of outstanding wall outer surface; Lower counterbore on seal receptacle, middle part is provided with second partition, and the upper surface of second partition and lower surface are respectively the bottom surface of top counterbore and bottom counterbore, and the sidewall radial direction below second partition is provided with the through hole be communicated with bottom counterbore; Seal receptacle is located at piston containing cavity lower end, and its lower surface is close to the upper surface of piston containing cavity bottom surface; Spring upper end is located in lower pipe, and lower end is located in the counterbore of seal receptacle top; Under principal post, pipe is located in piston containing cavity, the inwall interference fit of piston urceolus lower end and piston containing cavity, and piston can along with the crank motion in piston containing cavity that stretches of spring; Second glass bead is located in the second glass bead containing cavity, can by second partition and the second glass bead containing cavity lower ending opening spacing.
Preferably, described piston outer tube inner wall surrounds the truncated cone-shaped piston chamber forming upper bottom surface diameter and be less than bottom surface diameter below fin.
Preferably, described lower pipe upper inside wall is provided with the first retaining convex rib, and described seal receptacle top slotted wall is provided with the second retaining convex rib, and the upper end of spring is spacing by described first retaining convex rib, lower end by the second retaining convex rib and second partition spacing.
Advantageous Effects of the present utility model is:
1. piston and principal post are fixed, and add interference fit, ensure that the fastness of the connection of piston and principal post.The split-type structural of piston and principal post, is conducive to piston employing and makes the material of good environmental adaptability, ensure the stable performance of cylinder assembly.
2. the emulsion pumps containing this structure, reduces the requirement to processing technology, simplifies follow-up assembling.First glass bead and the second glass bead serve the effect of check valve, ensure that the output of liquid smoothness under no leakage and using state.
[accompanying drawing explanation]
The section of structure of the emulsion pumps in Fig. 1 embodiment one;
The principal post section of structure of the emulsion pumps in Fig. 2 embodiment one;
The block diagram of a principal post angle of the emulsion pumps in Fig. 3 embodiment one;
The piston structure section-drawing of the emulsion pumps in Fig. 4 embodiment one;
The block diagram of a piston angle of the emulsion pumps in Fig. 5 embodiment one;
The seal receptacle section of structure of the emulsion pumps in Fig. 6 embodiment one;
The block diagram of a seal receptacle angle of the emulsion pumps in Fig. 7 embodiment one;
The block diagram of another angle of seal receptacle of the emulsion pumps in Fig. 8 embodiment one.
[detailed description of the invention]
In order to make the technical scheme of this patent and technique effect clearly, be described in detail below in conjunction with the detailed description of the invention of drawings and Examples to this patent.
Embodiment one:
As Fig. 1 to 8, the emulsion pumps in the present embodiment, comprises by mouth 1, the first glass bead 2, principal post 3, locking closure 4, thread 5, pad 6, piston 7, spring 8, seal receptacle 9, the pump housing 10, the second glass bead 11 and suction pipe 12.
Press mouth 1 and roughly become " L " shape, comprise cross bar 111 and vertical pole 112, cross bar 111 end is reclinate arcuation, and vertical pole 112 outside is provided with outside thread, is provided with the liquid outlet channel 113 running through cross bar 111 end and vertical pole 112 end by mouth 1 inside.Vertical pole 112 inwall and following upper pipe 31 outer wall are fixed, and vertical pole 112 is provided with the first dividing plate 114 of blowing-by liquid outlet channel 113 in upper end.
Principal post 3 in a tubular form, comprises pipe 31 and lower pipe 32, and coaxially, the external diameter of upper pipe 31 is less than the external diameter of lower pipe 32 for upper pipe 31 and lower pipe 32.Upper pipe 31 lower end is provided with the first glass bead containing cavity 311, first glass bead containing cavity 311 lower end circular port diameter is less than the diameter of the first glass bead 2, first glass bead 2 is located in the first glass bead containing cavity 311, can by the first glass bead containing cavity lower end circular port and the first dividing plate 114 spacing.Lower pipe 32 upper end inwall is provided with the first retaining convex rib 321, lower end outer wall is provided with tubular-baffle 322, baffle plate 322 is connected with lower pipe 32 outer wall by horizontal cover plate 323, the outer wall of lower pipe 32 below cover plate 323 is provided with the first flange 324 of pipe 32 outer wall under protrusion and the second flange 325, first flange 324 does not contact with baffle plate 322 inwall with the second flange 325 outer wall; Baffle plate 322, cover plate 323 and lower pipe 32 tube wall below cover plate 323 forms piston positioning groove 326.
Locking closure 4 is in tubular, and be axially arranged with the through hole passed for principal post 3, hole wall is provided with negative thread; Locking closure 4 sidewall is provided with annular first groove 41, first groove 41 sidewall and is provided with groove.
The pump housing 10 upper and lower opening, forms locking closure containing cavity 101 by side walls enclose from top to bottom, piston containing cavity 102, second glass bead containing cavity 103, feed pathway 104.Locking closure containing cavity 101 outer wall is provided with the flange be fixed with the first groove 41 inboard wall groove, and below it, radial direction is provided with outstanding circular platform, circular platform and thread 5 free-running fit; The lower surface of annulus platform is provided with pad 6; The pump housing 10 piston containing cavity 102 is cylindrical; Second glass bead containing cavity 103 lower end circular port diameter is less than the diameter of the second glass bead 11.
Principal post 3 times pipes 32 through locking closure 4, and extend in piston containing cavity 102, and cover plate 323 upper surface is spacing by locking closure 4 lower surface.
Spring 8 upper end is located in lower pipe 32, lower end by the second retaining convex rib 931 in following seal receptacle 9 upper grooves and second partition 92 spacing.
Piston 7, with Low Density Polyethylene (LDPE) injection mo(u)lding, Low Density Polyethylene (LDPE) has good elasticity and strong to environmental adaptability; Piston 7 is in tubular, and comprise inner core 71 and urceolus 72, urceolus 72 outside face is indent arc, and inner core 71 is located at urceolus 72 top, and inner core 71 outer wall is connected by horizontal endless fin 73 with urceolus 72 inwall.Inner core 71 inwall is provided with the second groove 711 matched with the first flange 324 profile.The inwall of urceolus 72 below fin 73 surrounds the truncated cone-shaped piston chamber 74 forming upper surface diameter and be less than lower surface diameter.Urceolus 72 inwall, inner core 71 outer wall and fin 73 upper surface surround wedge shape the 3rd groove 75 forming gradually little setting from top to bottom.Inner core 71 is located in piston positioning groove 326, and the first flange 324 engages with the second groove 711, inner core 71 and ring-side wall interference fit in piston positioning groove 326, and the 3rd flange 325 limited piston 7 can depart from lower pipe 32 further.Baffle plate 322 is located in the second groove 711, and piston can be made stressed more balanced.Piston 7 is located in piston containing cavity 102, urceolus 72 bottom and piston containing cavity 102 inwall interference fit, and the lubricating effect of its dependence lubricant or liquid can along with spring 8 pumps in piston containing cavity 102.The engaging of piston 7 and principal post 3 adds interference fixed form and makes the connection between them very firm, can be applied to other cylinder application.
Seal receptacle 9 wall outer surface in the truncated cone-shaped of piston chamber 74 adaptation, lower surface be provided with outstanding wall outer surface annular backup pad 91.Lower counterbore on seal receptacle 9, middle part is provided with second partition 92, the upper surface of second partition 92 and lower surface are respectively the bottom surface of top counterbore 93 and bottom counterbore 94, be provided with the second retaining convex rib 931 at top counterbore 93 inside face uniform intervals, on the sidewall below second partition 92, radial direction is provided with the horizontal through hole 941 be communicated with bottom counterbore 94.Seal receptacle 9 is located at piston containing cavity 102 lower end, and its lower surface is close to the upper surface of the bottom surface of piston containing cavity 102.
Principal post 3, locking closure 4, piston 7, thread 5, the pump housing 10 and seal receptacle 9 all coaxial.
Locking state is in when emulsion pumps dispatches from the factory, namely closely cooperate by the outside thread of mouth 1 vertical pole 112 outer wall and the negative thread of locking closure 4, spring 8 is in compressive state, piston 7 is located in the seal groove between piston containing cavity 102 sidewall and seal receptacle 9 outer wall, and the stay bearing plate 91 of piston 7 and seal receptacle 9 forms the sealing to emulsion pumps and bottle (not shown); When needing to use emulsion pumps, first turn on by mouth, remove locking closure 4 to the lockmaking of pressing mouth 1, spring 8 pushes the first retaining convex rib 321 upward movement under the effect of restoring force, piston 7 is also along with principal post 3 upward movement, air pressure in piston containing cavity 102 reduces until be less than external pressure gradually, and the first glass bead 2 seals the outlet of liquid outlet channel 113 under the atmospheric effect in outside; And bottle internal gas pressure is greater than the air pressure in piston containing cavity 102, second glass bead 11 upward movement, feed pathway 104 entrance is opened, liquid runs down feed pathway 104 in gas residual in the suction pipe 12 be connected with feed pathway 104 or bottle enters the second glass bead containing cavity 103 successively, seal receptacle 9 bottom fluting 94, enters in piston containing cavity 102 by through hole 941; Press down by mouth 1, spring 8 is compressed, piston 7 moves downward along with principal post 3, piston containing cavity 102 internal gas pressure below piston 7 increases, first glass bead 2 is obtained upward movement by piston containing cavity 102 internal gas pressure pressure top, liquid outlet channel 113 entrance is opened, the liquid in piston chamber 74 and piston containing cavity 102 by the first glass bead containing cavity 311 again through discharging by the liquid outlet channel 113 in mouth 1.Unclamp by mouth 1, spring 8 is upward movement under the effect of restoring force, and so forth.
There is above-mentioned working process known, piston chamber 74 and seal receptacle 9 truncated cone-shaped structure, when only having seal receptacle 9 to be positioned at piston chamber 74 completely, just friction force is there is between piston chamber 74 sidewall and seal receptacle 9, contribute to like this reducing the friction force in piston movement process, the frictional loss thus reducing piston extends its life-span.
The foregoing is only the preferred embodiment of this patent, be not limited to this patent, for a person skilled in the art, this patent can have various modifications and variations.Within all spirit at this patent and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in this patent.
Claims (8)
1. a cylinder assembly, comprises principal post and piston; Principal post lower end is provided with annular piston positioning groove, and the medial surface of piston positioning groove is provided with at least one flange; Piston is tubular, and its outer wall shape, inner wall shape are suitable with the lateral surface of piston positioning groove, medial surface shape respectively, and piston inner wall is provided with second suitable groove of at least one and flange; Piston embeds in piston positioning groove, and flange and the second groove are fixed, and ring-side wall interference fit in piston side wall and piston positioning groove.
2. cylinder assembly as claimed in claim 1, it is characterized in that: described piston comprises inner core and urceolus, outer tube outer surface is indent arc; Inner core is located at urceolus top, and its outer wall is connected by horizontal endless fin with outer tube inner wall; Outer tube inner wall, inner tank theca and fin upper surface surround wedge shape the 3rd groove being formed and reduce from top to bottom to arrange; Described principal post piston positioning groove lateral wall is located in the 3rd groove.
3. cylinder assembly as claimed in claim 1 or 2, is characterized in that: described piston Low Density Polyethylene is made.
4. one kind comprises the emulsion pumps of cylinder assembly according to claim 2, it is characterized in that: described principal post in a tubular form, comprise coaxial top tube and down tube, lower pipe outer wall is provided with tubular-baffle, baffle plate is connected with lower pipe outer wall by horizontal cover plate, and the outer wall of lower pipe below cover plate is provided with at least one flange; Baffle plate, cover plate and the lower pipe tube wall below cover plate surrounds and forms piston positioning groove.
5. emulsion pumps as claimed in claim 4, its spy is being: it also comprises by mouth, the first glass bead, spring, seal receptacle, the pump housing and the second glass bead;
Comprise cross bar and vertical pole by mouth, be provided with by mouth inside the liquid outlet channel running through crossbar end and vertical pole end, vertical pole upper end is provided with the first dividing plate of blowing-by liquid outlet channel;
Described upper pipe lower end is provided with the first glass bead containing cavity, and the first glass bead containing cavity lower end port diameter is less than the diameter of the first glass bead, and the first glass bead is located in the first glass bead containing cavity, can by the first glass bead containing cavity lower end port and the first dividing plate spacing;
Pump housing upper and lower opening, is provided with piston containing cavity from top to bottom successively, the second glass bead containing cavity, feed pathway; Piston containing cavity is cylindrical, in the diameter of the second glass bead under the second glass bead containing cavity lower end port diameter;
Seal receptacle sidewall shape and the inner wall shape of piston urceolus below fin suitable, lower surface is provided with the annular backup pad of outstanding wall outer surface; Seal receptacle has counterbore, and middle part is provided with second partition, and the upper surface of second partition and lower surface are respectively the bottom surface of top counterbore and bottom counterbore, and the sidewall radial direction below second partition is provided with the through hole be communicated with bottom counterbore; Seal receptacle is located at piston containing cavity lower end, and its lower surface is close to the upper surface of piston containing cavity bottom surface;
Spring upper end is located in lower pipe, and lower end is located in the counterbore of seal receptacle top; Under principal post, pipe is located in piston containing cavity, the inwall interference fit of piston urceolus lower end and piston containing cavity, and piston can along with the crank motion in piston containing cavity that stretches of spring;
Second glass bead is located in the second glass bead containing cavity, can by second partition and the second glass bead containing cavity lower ending opening spacing.
6. emulsion pumps as claimed in claim 5, its spy is being: described piston outer tube inner wall surrounds the truncated cone-shaped piston chamber forming upper bottom surface diameter and be less than bottom surface diameter below fin.
7. the emulsion pumps as described in claim 5 or 6, it is characterized in that: described lower pipe upper inside wall is provided with the first retaining convex rib, described seal receptacle top counterbore sidewall is provided with the second retaining convex rib, the upper end of spring is spacing by described first retaining convex rib, lower end by the second retaining convex rib and second partition spacing.
8. the emulsion pumps as described in claim 4 or 5 or 6, its spy is being: described piston Low Density Polyethylene is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420790551.8U CN204433338U (en) | 2014-12-12 | 2014-12-12 | A kind of cylinder assembly and the emulsion pumps comprising this assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420790551.8U CN204433338U (en) | 2014-12-12 | 2014-12-12 | A kind of cylinder assembly and the emulsion pumps comprising this assembly |
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| CN204433338U true CN204433338U (en) | 2015-07-01 |
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| CN201420790551.8U Active CN204433338U (en) | 2014-12-12 | 2014-12-12 | A kind of cylinder assembly and the emulsion pumps comprising this assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021184652A1 (en) * | 2020-03-18 | 2021-09-23 | 深圳市优创智品科技有限公司 | Wearable hand disinfecting device |
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2014
- 2014-12-12 CN CN201420790551.8U patent/CN204433338U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021184652A1 (en) * | 2020-03-18 | 2021-09-23 | 深圳市优创智品科技有限公司 | Wearable hand disinfecting device |
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