CN201416541Y - Eccentric rotor type oil pump - Google Patents
Eccentric rotor type oil pump Download PDFInfo
- Publication number
- CN201416541Y CN201416541Y CN2009200723683U CN200920072368U CN201416541Y CN 201416541 Y CN201416541 Y CN 201416541Y CN 2009200723683 U CN2009200723683 U CN 2009200723683U CN 200920072368 U CN200920072368 U CN 200920072368U CN 201416541 Y CN201416541 Y CN 201416541Y
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- Prior art keywords
- rotor
- oil
- tooth
- pump
- internal rotor
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Abstract
The utility model discloses an eccentric rotor type oil pump, which is characterized in that a pump body is internally provided with an outer rotor and an inner rotor, wherein the outer rotor and theinner rotor are eccentrically arranged, the inner rotor is connected with a pump shaft, the tooth number of the inner rotor is less one than that of the outer rotor, the inner rotor and the outer rotor are meshed with each other to form a fully meshed area and forms a sealed area on the reverse position; in the fully meshed area, the tooth surface of the inner rotor fully fits with that of the outer rotor; in the sealed area, the tooth crest of the inner rotor is in sliding contact with that of the outer rotor; and the sealed area separates an oil absorbing area with an oil pressing area. Theinner rotor of the oil pump is positioned in the outer rotor, the inner rotor and the outer rotor are in inner meshing, so the pump body of the oil pump has the advantages of compact structure, smallsize, light weight and the like compared with the oil pump in the outer meshing manner.
Description
Technical field
The utility model relates to a kind of oil scavenge pump, particularly a kind of compact structure, the motor car engine that volumetric efficiency is high eccentric rotor formula oil pump.
Background technique
Oil hydraulic pump is the dynamical element in the Hydraulic Power Transmission System.Its effect is that the mechanical energy that prime mover is imported is changed into the hydraulic pressure energy, and the working liquid body with certain pressure and flow is provided to system.Its service behaviour directly arrives the reliability of hydraulic system, occupies important status in hydraulic transmission.
Oil pump is a kind of as oil hydraulic pump, and is comparatively commonly used on motor car engine, and it mainly acts on is that machine oil is delivered to the motor position that respectively rubs, and machine oil is circulated in lubricated road, good lubricated to guarantee that motor obtains.Oil pump mostly is gear pump, the oil pump of existing motor car engine mostly is outer gearing formula oil pump, its structure as shown in Figure 1, comprise the pump housing 31, driving gear 32 and driven gear 33, driving gear 32 and driven gear 33 are positioned at the pump housing 31, driving gear 32 and driven gear 33 engagements, intermeshing master in the pump housing 31, driven gear 32 and 33 constitutes the seal operation volume with the pump housing 31, the gear meshing left side of naming a person for a particular job, right two chambeies separate, formed suction, pumping cavity, when gear is rotated counterclockwise, the gear teeth in the oil sucting cavity of right side break away from engagement, and seal operation chamber volume constantly increases, and form partial vacuum, fluid enters oil sucting cavity from fuel tank through inlet port 34 under the atmospheric pressure effect, and the gear teeth that are rotated are brought the pumping cavity in left side into.The gear teeth in the pumping cavity of left side constantly enter engagement, and seal operation chamber volume is reduced, and fluid is squeezed by pressing hydraulic fluid port 35 to discharge.
The general volume of this outer gearing formula oil pump is big and weight is heavier, and unusual inconvenience during installation can take bigger vehicle body space after the installation, increases car body weight, and can increase cost of production.
The model utility content
At above-mentioned the deficiencies in the prior art, the technical problems to be solved in the utility model provides little, the lightweight oil pump of a kind of volume, thereby reduces production costs.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of eccentric rotor formula oil pump, comprise the pump housing, pump cover, pump shaft, the described pump housing is provided with filler opening and oil outlet, be formed with oil suction district and laminated oil zone in the described pump housing, described filler opening is communicated with described oil suction district, described oil outlet is communicated with described laminated oil zone, be provided with the internal rotor that an external rotor and with interior engaging tooth has the outer gearing tooth in the described pump housing, described external rotor and described internal rotor are eccentric to be provided with, described internal rotor is connected with described pump shaft, few one of the number of teeth of the described external rotor of gear ratio of described internal rotor, described internal rotor and external rotor are meshed and form a complete meshing zone and form a seal area at its opposite location place, in described complete meshing zone, the flank of tooth of the described internal rotor flank of tooth and described external rotor is fitted fully; In described seal area, the tooth top sliding contact of the tooth top of described internal rotor and described external rotor, described seal area is with described oil suction district and described laminated oil zone seal isolation.
Preferably, the tooth top of the tooth top of described external rotor and described internal rotor is a circular arc.
Preferably, described external rotor is provided with 6 teeth, and described internal rotor is provided with 5 teeth.
Further, also be provided with a pressure limiting hole on the described pump housing, described pressure limiting is provided with a drain tap in the hole, also is provided with a pressure limiting plunger in the described pressure limiting hole, described pressure limiting plunger is connected with a pressure-limit valve plug screw by a pressure limiting spring, and described pressure-limit valve plug screw is connected with the described pump housing.
Technique scheme has following beneficial effect: in this technological scheme, internal rotor is positioned at the inside of external rotor, is interior engagement between the inner and outer rotors, with respect to the oil pump of outer gearing mode, advantages such as the pump housing of this oil pump has compact structure, and volume is little, in light weight.
Description of drawings
Fig. 1 is the structural scheme of mechanism of existing outer gearing formula oil pump.
Fig. 2 is the utility model embodiment's a structural representation.
Fig. 3 is the structural representation of the utility model embodiment internal rotor and external rotor engagement.
Fig. 4 is the structural representation of teeth groove die cavity inner and outer rotors engagement when being in the oil extraction state.
The structural representation of inner and outer rotors engagement when Fig. 5 is middle teeth groove die cavity oil extraction finishing state.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in Figure 2, as a preferred embodiment of the present utility model, this oil pump comprises the pump housing 18, pump cover 12, and the pump housing 18 is fixedlyed connected by screw 11 with pump cover 12, and the pump housing 18 is provided with filler opening and oil outlet.Referring to Fig. 3, be provided with an oil suction district 22 and a laminated oil zone 21 in the pump housing 18, oil suction district 22 and filler opening are communicated with, and laminated oil zone 21 and oil outlet are communicated with.Also be provided with the external rotor 19 of engaging tooth in the band and the internal rotor 13 of a band outer gearing tooth in the pump housing 18, external rotor 19 is provided with 6 teeth, internal rotor 13 is provided with 5 teeth, internal rotor 13 is positioned at the inside of external rotor 9, internal rotor 13 and external rotor 9 eccentric settings, external rotor 19 and internal rotor 13 engagements, internal rotor 13 is connected with pump shaft 20.
See also Fig. 3, when the teeth groove between the tooth 4 ', 5 ' of the tooth 4 of the top of internal rotor 13 and external rotor 19 meshed fully, promptly the flank of tooth of the flank of tooth of tooth 4 and tooth 5 ' was fitted fully, at this moment, can form a seal area 23 at its opposite direction.In sealing district 23, the tooth top sliding contact of the tooth top of the tooth 1 of internal rotor 13 and the tooth 1 ' of external rotor 19, the tooth top sliding contact of the tooth top of the tooth 2 of internal rotor 13 and the tooth 2 ' of external rotor 19, sealing district 23 just forms the teeth groove die cavity 24 of a sealing by the contact of the tooth top between the inner and outer rotors like this, and sealing district 23 isolates oil suction district 22 and laminated oil zone 21.1 to 5 engaging tooth that is expressed as internal rotor among Fig. 3, Fig. 4, Fig. 5, the engaging tooth of 1 ' to 6 ' expression external rotor.
Also be provided with a pressure limiting hole on the pump housing 18, be provided with a draining hole in the pressure limiting hole, also be provided with a pressure limiting plunger 15 in the pressure limiting hole, pressure limiting plunger 15 is connected with pressure-limit valve plug screw 17 by a pressure limiting spring 16, and pressure-limit valve plug screw 17 is fixed on the pump housing 18.
Working principle to this oil pump is described in detail below, as shown in Figure 3, tooth top sliding contact when the tooth 1 ' of the tooth top of the tooth 1 of internal rotor 13 and external rotor 19, during the tooth top sliding contact of the tooth top of the tooth 2 of internal rotor 13 and the tooth 2 ' of external rotor 19, this moment outer rotor teeth 1 ', the volume maximum of the teeth groove die cavity 24 between 2 ', be full of machine oil in the teeth groove die cavity 24, when driving external rotor 19, internal rotor 13 rotates counterclockwise, after turning an angle, the tooth 1 of internal rotor 13 is gradually with 1 ', teeth groove engagement between 2 ', as shown in Figure 4, this moment, teeth groove die cavity 24 interior volumes reduced gradually, oil pressure in the teeth groove die cavity 24 raises, and the machine oil in the teeth groove die cavity 24 flows into laminated oil zone 21.When internal rotor 13 turns to as shown in Figure 5 the position, when the teeth groove between the tooth 1 of internal rotor 13 and the outer rotor teeth 1 ', 2 ' meshes fully, the flank of tooth of tooth 1 and the flank of tooth of tooth 2 ' are fitted fully, the minimum that the volume of teeth groove die cavity 24 becomes approaches zero, this moment, teeth groove die cavity 24 interior machine oil were extruded fully, and this oil pump is just finished an oil extraction like this.
Said process is the description that the working procedure of a teeth groove die cavity of this oil pump is done, this oil pump can form several teeth groove die cavities identical with number of inner teeth, the working procedure of each teeth groove die cavity is the same substantially, be that internal rotor rotates a circle, a teeth groove die cavity will be finished an oil suction and oil extraction.In sum, this eccentric rotor formula oil pump is exactly the purpose that reaches the oil suction oil extraction with this periodic variation, concerning whole eccentric rotor formula oil pump, has n teeth groove die cavity and finishes an oil suction and oil extraction, n is the number of teeth of internal rotor, and n equals 5 for present embodiment.
The pump housing 18 is provided with the pressure limiting hole; when oil pump oil outlet pressure surpasses certain value; pressure limiting plunger 15 in the pressure limiting hole is subjected to engine oil pressure; compression pressure limiting spring 16; make pressure limiting plunger 15 move on to the drain tap position; this moment, the drain tap of oil pump was communicated with filler opening, and machine oil is by circulating in drain tap and the filler opening, thereby oil pump is protected.
The internal rotor of this oil pump is positioned at the inside of external rotor, it between the inner and outer rotors interior engagement, oil pump with respect to the outer gearing mode, the structure of the pump housing of this oil pump is more compact, volume is little, in light weight, and this oil pump actual volume efficient is higher, under the situation of discharging identical oil mass, the volume of this oil pump is half of outer gearing oil pump volume, therefore also can effectively reduce the cost of production of oil pump.
More than a kind of eccentric rotor formula oil pump that the utility model embodiment is provided be described in detail; for one of ordinary skill in the art; thought according to the utility model embodiment; part in specific embodiments and applications all can change; in sum; this description should not be construed as restriction of the present utility model, and all any changes of being made according to the utility model design philosophy are all within protection domain of the present utility model.
Claims (4)
1, a kind of eccentric rotor formula oil pump, comprise the pump housing, pump cover, pump shaft, the described pump housing is provided with filler opening and oil outlet, be formed with oil suction district and laminated oil zone in the described pump housing, described filler opening is communicated with described oil suction district, described oil outlet is communicated with described laminated oil zone, be provided with the internal rotor that an external rotor and with interior engaging tooth has the outer gearing tooth in the described pump housing, described external rotor and described internal rotor are eccentric to be provided with, described internal rotor is connected with described pump shaft, it is characterized in that: few one of the number of teeth of the described external rotor of gear ratio of described internal rotor, described internal rotor and external rotor are meshed and form a complete meshing zone and form a seal area at its opposite location place, in described complete meshing zone, the flank of tooth of the described internal rotor flank of tooth and described external rotor is fitted fully; In described seal area, the tooth top sliding contact of the tooth top of described internal rotor and described external rotor, described seal area is with described oil suction district and described laminated oil zone seal isolation.
2, eccentric rotor formula oil pump according to claim 1, it is characterized in that: the tooth top of described external rotor and the tooth top of described internal rotor are circular arc.
3, eccentric rotor formula oil pump according to claim 1, it is characterized in that: described external rotor is provided with 6 teeth, and described internal rotor is provided with 5 teeth.
4, eccentric rotor formula oil pump according to claim 1, it is characterized in that: also be provided with a pressure limiting hole on the described pump housing, described pressure limiting is provided with a drain tap in the hole, also be provided with a pressure limiting plunger in the described pressure limiting hole, described pressure limiting plunger is connected with a pressure-limit valve plug screw by a pressure limiting spring, and described pressure-limit valve plug screw is connected with the described pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200723683U CN201416541Y (en) | 2009-05-15 | 2009-05-15 | Eccentric rotor type oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200723683U CN201416541Y (en) | 2009-05-15 | 2009-05-15 | Eccentric rotor type oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201416541Y true CN201416541Y (en) | 2010-03-03 |
Family
ID=41792958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200723683U Expired - Lifetime CN201416541Y (en) | 2009-05-15 | 2009-05-15 | Eccentric rotor type oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201416541Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482385A (en) * | 2014-12-10 | 2015-04-01 | 重庆小康工业集团股份有限公司 | Engine oil pump of internal combustion engine |
| CN105371090A (en) * | 2015-12-14 | 2016-03-02 | 联禾厚普（太仓）精密机械有限公司 | Pressure-stabilized engine oil pump |
| CN109000139A (en) * | 2018-08-06 | 2018-12-14 | 奇瑞汽车股份有限公司 | Rotor engine oil pump |
-
2009
- 2009-05-15 CN CN2009200723683U patent/CN201416541Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482385A (en) * | 2014-12-10 | 2015-04-01 | 重庆小康工业集团股份有限公司 | Engine oil pump of internal combustion engine |
| CN104482385B (en) * | 2014-12-10 | 2016-09-14 | 重庆小康工业集团股份有限公司 | Engine oil pump of internal combustion engine |
| CN105371090A (en) * | 2015-12-14 | 2016-03-02 | 联禾厚普（太仓）精密机械有限公司 | Pressure-stabilized engine oil pump |
| CN109000139A (en) * | 2018-08-06 | 2018-12-14 | 奇瑞汽车股份有限公司 | Rotor engine oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190402 Address after: Building No. 18, 998 Tongji Road, Baoshan District, Shanghai, 20199 Patentee after: Huayu Pilberg Pump Technology Co., Ltd. Address before: No. 309 Youyi Road, Baoshan District, Shanghai, 201900 Patentee before: Shanghai Xingfu Motorcycle Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |
|
| CX01 | Expiry of patent term |