CN204692055U - Diaphragm-type vacuum pump - Google Patents
Diaphragm-type vacuum pump Download PDFInfo
- Publication number
- CN204692055U CN204692055U CN201520401821.6U CN201520401821U CN204692055U CN 204692055 U CN204692055 U CN 204692055U CN 201520401821 U CN201520401821 U CN 201520401821U CN 204692055 U CN204692055 U CN 204692055U
- Authority
- CN
- China
- Prior art keywords
- pump housing
- cavity
- pump
- diaphragm
- type vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of diaphragm-type vacuum pump, comprise the pump housing and pump cover, the fitting surface of the pump housing and pump cover is provided with eardrum, pump body is provided with cavity, be provided with connecting rod in cavity, connecting rod is in transmission connection eardrum, it is characterized in that: be provided with buffer cavity in the described pump housing, be provided with rubber valve in buffer cavity, between buffer cavity and cavity, be provided with ventilation tubule.This solution provides a kind of diaphragm-type vacuum pump, avoid pump body chamber pressure to fluctuate large problem by arranging buffer structure, ensure that each parts normally run.
Description
Technical field
The utility model relates to a kind of diaphragm-type vacuum pump, belongs to auto parts machinery field.
Background technique
Diaphragm-type vacuum pump is to braking automobile power-assisted use, and diaphragm-type vacuum pump, rely on connecting rod to-and-fro motion by the rotation of eccentric shaft, barrier film is activated by the to-and-fro motion of connecting rod with repeated admission and exhaust.This connecting rod mechanism is exactly so-called connecting rod usually, generally arranges connecting sleeve and connects barrier film and crank respectively, connecting sleeve to-and-fro motion in the piston cylinder of the pump housing, thus makes the continuous suction and discharge of barrier film.And diaphragm movement also can produce certain influence to pump housing inner cavity, along with operating temperature rises, pump housing chamber pressure increases, and proposes larger test to the join strength of each parts of the pump housing.And barrier film to-and-fro motion always, pump housing internal pressure be also reciprocal small one and large one, be equivalent to constantly rock each parts, parts surface easily affects generation creep by alternating stress.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of diaphragm-type vacuum pump, avoiding pump body chamber pressure and to fluctuate large problem, ensure that each parts normally run by arranging buffer structure.
For achieving the above object, the utility model provides following technological scheme: a kind of diaphragm-type vacuum pump, comprise the pump housing and pump cover, the fitting surface of the pump housing and pump cover is provided with eardrum, and pump body is provided with cavity, is provided with connecting rod in cavity, connecting rod is in transmission connection eardrum, be provided with buffer cavity in the described pump housing, in buffer cavity, be provided with rubber valve, between buffer cavity and cavity, be provided with ventilation tubule.
Preferably, the described pump housing is provided with the auxiliary hole that the described ventilation tubule of processing is formed, and on auxiliary hole, shutoff has steel ball.
Preferably, described connecting rod comprises connecting sleeve, crank, bent axle, connecting sleeve one end connects described eardrum, the connecting sleeve the other end is by straight pin connecting crank, and crank drive connects described bent axle, and bent axle to be rotatably connected on the pump housing by bearing and bent axle head stretches out the pump housing, bent axle head is connected with belt pulley, described bearing outer wall is provided with fixed groove, and the pump housing is connected with fastening screw trip bolt, and fastening screw trip bolt head stretches in fixed groove.
Preferably, the described pump housing is provided with the oil hole into described cavity oiling, and oil hole shutoff has plug, and compressing between plug and the pump housing has fine aluminium packing ring.
By adopting technique scheme, rubber valve is exactly a similar columned block rubber in fact, because it is rubber, has good deformation quantity and decrement.When pump housing cavity pressure uprises, then pressure is passed over high pressure by ventilation tubule, and rubber valve is compressed, and pump housing cavity pressure is maintained to a certain degree.Along with the reciprocating of eardrum, buffer cavity should be synchronous with pump housing cavity pressure in theory, but due to the damping function of tubule of ventilating, a pressure always delayed step of buffer cavity, therefore just there will be following situation, when upwards drum makes pump housing cavity become large to eardrum, cavity pressure diminishes, but buffer cavity pressure still maintains original state, buffer cavity adds to pump housing cavity pressure, reduces pump housing cavity pressure variable quantity.Eardrum is also downwards same reason, therefore arranges buffer cavity and can alleviate pump housing cavity pressure variable quantity, better protection pump body part.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is erection drawing of the present utility model;
Fig. 2 is the enlarged view at A place in the utility model Fig. 1;
Fig. 3 is the enlarged view at B place in the utility model Fig. 1;
Fig. 4 is the enlarged view at C place in the utility model Fig. 1.
Accompanying drawing illustrates: 1, the pump housing; 2, pump cover; 3, eardrum; 4, connecting sleeve; 5, crank; 6, bent axle; 7, cavity; 8, buffer cavity; 9, rubber valve; 10, ventilation tubule; 11, steel ball; 12, plug; 13, fine aluminium packing ring; 14, bearing; 14a, fixed groove; 14b, fastening screw trip bolt.
Embodiment
A kind of diaphragm-type vacuum pump, comprise the pump housing 1 and pump cover 2, the fitting surface of the pump housing 1 and pump cover 2 is provided with eardrum 3, the pump housing 1 inside is provided with cavity 7, be provided with crank 5 linkage mechanism in cavity 7, crank 5 linkage transmission connects eardrum 3, is provided with buffer cavity 8 in the pump housing 1, be provided with rubber valve 9 in buffer cavity 8, between buffer cavity 8 and cavity 7, be provided with tubule 10 of ventilating.Rubber valve 9 is exactly a similar columned block rubber in fact, because it is rubber, has good deformation quantity and decrement.When the pump housing 1 cavity 7 pressure uprises, then pressure is passed over high pressure by ventilation tubule 10, and rubber valve 9 is compressed, and the pump housing 1 cavity 7 pressure is maintained to a certain degree.Along with the reciprocating of eardrum 3, buffer cavity 8 should be synchronous with the pump housing 1 cavity 7 pressure in theory, but due to the damping function of tubule 10 of ventilating, a pressure always delayed step of buffer cavity 8, therefore just there will be following situation, when upwards drum makes the pump housing 1 cavity 7 become large to eardrum 3, cavity 7 pressure diminishes, but buffer cavity 8 pressure still maintains original state, buffer cavity 8 adds to the pump housing 1 cavity 7 pressure, reduces the pump housing 1 cavity 7 pressure variety.Eardrum 3 is also same reason downwards, therefore arranges buffer cavity 8 and can alleviate the pump housing 1 cavity 7 pressure variety, the better protection pump housing 1 inner body.
Wherein, the pump housing 1 is provided with the auxiliary hole that processing ventilation tubule 10 is formed, and on auxiliary hole, shutoff has steel ball 11.Steel ball 11 both can prevent extraneous dust from entering, and also can prevent internal lubrication oil spill from going out, and it also has a hidden function certainly, and exactly when the pump housing 1 cavity 7 internal pressure increases above suddenly part load, steel ball 11 is deviate from, and plays the effect of pressure release.
Wherein, crank 5 linkage mechanism comprises connecting sleeve 4, crank 5, bent axle 6, connecting sleeve 4 one end connects described eardrum 3, connecting sleeve 4 the other end is by straight pin connecting crank 5, and crank 5 is in transmission connection described bent axle 6, and bent axle 6 to be rotatably connected on the pump housing 1 by bearing 14 and bent axle 6 head stretches out the pump housing 1, bent axle 6 head is connected with belt pulley, described bearing 14 outer wall is provided with fixed groove 14a, the pump housing 1 is connected with fastening screw trip bolt 14b, and fastening screw trip bolt 14b head stretches in fixed groove 14a.Bearing 14 does not adopt the mode of interference fit, and locates relevant position by fastening screw trip bolt 14b, not only facilitate dismounting and assembling, and positioning precision is better, it also avoid the distortion of striking and causing the pump housing 1 when last item holds 14 simultaneously.
Wherein, the pump housing 1 is provided with the oil hole into cavity 7 oiling, and oil hole shutoff has plug 12, compresses fine aluminium packing ring 13 between plug 12 and the pump housing 1.Fine aluminium packing ring 13 has the feature of corrosion-and high-temp-resistant, therefore, it is possible to effectively form sealing, avoids oil leak out.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a diaphragm-type vacuum pump, comprise the pump housing and pump cover, the fitting surface of the pump housing and pump cover is provided with eardrum, pump body is provided with cavity, be provided with connecting rod in cavity, connecting rod is in transmission connection eardrum, it is characterized in that: be provided with buffer cavity in the described pump housing, be provided with rubber valve in buffer cavity, between buffer cavity and cavity, be provided with ventilation tubule.
2. diaphragm-type vacuum pump according to claim 1, is characterized in that: the described pump housing is provided with the auxiliary hole that the described ventilation tubule of processing is formed, and on auxiliary hole, shutoff has steel ball.
3. diaphragm-type vacuum pump according to claim 2, it is characterized in that: described connecting rod comprises connecting sleeve, crank, bent axle, connecting sleeve one end connects described eardrum, the connecting sleeve the other end is by straight pin connecting crank, and crank drive connects described bent axle, and bent axle to be rotatably connected on the pump housing by bearing and bent axle head stretches out the pump housing, bent axle head is connected with belt pulley, described bearing outer wall is provided with fixed groove, and the pump housing is connected with fastening screw trip bolt, and fastening screw trip bolt head stretches in fixed groove.
4. diaphragm-type vacuum pump according to claim 3, is characterized in that: the described pump housing is provided with the oil hole into described cavity oiling, and oil hole shutoff has plug, and compressing between plug and the pump housing has fine aluminium packing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520401821.6U CN204692055U (en) | 2015-06-11 | 2015-06-11 | Diaphragm-type vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520401821.6U CN204692055U (en) | 2015-06-11 | 2015-06-11 | Diaphragm-type vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204692055U true CN204692055U (en) | 2015-10-07 |
Family
ID=54232356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520401821.6U Expired - Fee Related CN204692055U (en) | 2015-06-11 | 2015-06-11 | Diaphragm-type vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204692055U (en) |
-
2015
- 2015-06-11 CN CN201520401821.6U patent/CN204692055U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20170611 |