CN202441598U - Oil pump gear - Google Patents
Oil pump gear Download PDFInfo
- Publication number
- CN202441598U CN202441598U CN2012200737743U CN201220073774U CN202441598U CN 202441598 U CN202441598 U CN 202441598U CN 2012200737743 U CN2012200737743 U CN 2012200737743U CN 201220073774 U CN201220073774 U CN 201220073774U CN 202441598 U CN202441598 U CN 202441598U
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- CN
- China
- Prior art keywords
- gear
- oil pump
- adjacent
- pump gear
- gear shaft
- 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 provides an oil pump gear, belonging to the technical field of machinery. The oil pump gear solves the problems of serious abrasion, high noise and large medium leakage existing in the traditional oil pump gear component. The oil pump gear comprises gears and a gear shaft; bearings are arranged at the two sides of the gear shaft which are adjacent to the gears; journals for assembling the bearings arranged at the two sides of the gear shaft adjacent to the gears are conical bearing journals; and the diameters of the end surfaces of the conical bearing journals adjacent to gear ends are less than that of large ends. The oil pump gear has the advantages of being low in component abrasion, low in noise and less in medium leakage, effectively ensuring the working efficiency and prolonging the service life of a gear pump.
Description
Technical field
The utility model belongs to field of mechanical technique, particularly a kind of oil pump gear.
Background technique
Gear pump is to be used for a critical component of conveyance fluid medium in the machinery hydraulic system, and it relies on the high speed rotary motion fed sheet of a media of a pair of oil pump gear.When a pair of oil pump gear is made the high speed engagement driving in the pump housing; Along with contact points changes, the oil sucting cavity swept volume increases in the meshing zone, and the pressure in space reduces and the generation parital vacuum; Oil inlet port in the entering oil pump low pressure area under atmospheric effect in the oil sump produces the oil suction effect; In pumping cavity, because the oil pump gear teeth progress into engagement, its swept volume reduces, and produces the oil effect of pressing to pressure piping.The gear shaft of oil pump gear is cylindric in the existing technology, and oil pump gear comprises gear and gear shaft, and gear shaft is cylindric, but the both sides running in bearings adjacent on the gear shaft with gear.Oil pump gear is the operation element of gear pump most critical, and through the gear engagement effect, gear pump could be exported the required certain pressure and the medium of flow.Because oil pump gear requires different with general mechanical drive gear job specification; Its sideshake and bottom clearance are all very little during the oil pump gear engagement; The pressure medium of output is higher again, and its suffered load that interacts is very big, deflection deformation that gear shaft produces during work; Pressure medium is high more, and distortion is just big more.Because distortion causes gear shaft and bearing supporting place mated condition to worsen, impel the aggravation of gear pump component abrasion, generation abnormal sound, dielectric leakage, pressure to descend, utilization efficiency reduces, and shortens operating life.The continuous rotation of gear simultaneously, what the alternating stress of generation can continue acts on the gear shaft, and the long-term work meeting makes material production fatigue and causes axle journal fracture teeth wheel pump to scrap.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind ofly to alleviate component abrasion, reduces noise, reduces dielectric leakage, effectively guarantees working efficiency, has prolonged the oil pump gear of gear pump operating life.
The purpose of the utility model can realize through following technical proposal: a kind of oil pump gear; Comprise gear and gear shaft; The both sides that described gear shaft and gear are adjacent all are equipped with bearing; It is characterized in that the axle journal of the running in bearings of adjacent both sides with gear is coniform bearing journal on the described gear shaft, the coniform bearing journal end face diameter of contiguous gear end is less than Outside diameter.
In above-mentioned oil pump gear, the coniform bearing journal end face diameter of described contiguous gear end and Outside diameter footpath are poor to be 0.03mm～0.06mm.As preferred version, the coniform bearing journal end face diameter of contiguous gear end and Outside diameter footpath poor for 0.04mm be the best.
Compared with prior art; The utility model changes into cylindric axle journal coniform; Can make gear shaft when work because the deflection deformation of stressed generation is effectively compensated, this be because the distortion that the stressed back of gear shaft is produced that pointed journal is cooperated with bearing supporting place is more identical, support the fitting surface increasing; Pressure reduces relatively; Alleviated force-bearing situation, working attitude is greatly improved, thereby alleviates component abrasion, reduces noise, reduces dielectric leakage, effectively guarantees working efficiency, prolongs the gear pump operating life.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure, 1, gear; 2, bearing; 3, bearing journal.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.
As shown in Figure 1; This oil pump gear comprises gear 1 and gear shaft; Gear shaft and gear 1 adjacent both sides all are equipped with bearing 2; Axle journal with gear 1 adjacent both sides running in bearings 1 on the gear shaft is coniform bearing journal 3, and coniform bearing journal 3 end face diameters of contiguous gear end are less than Outside diameter.Coniform bearing journal 3 end face diameters of contiguous gear end and Outside diameter footpath are poor to be 0.03mm～0.06mm.As preferred version, coniform bearing journal 3 end face diameters of contiguous gear end and Outside diameter footpath poor for 0.04mm be the best.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Claims (2)
1. oil pump gear; Comprise gear (1) and gear shaft; The both sides that described gear shaft and gear (1) are adjacent all are equipped with bearing (2); It is characterized in that the axle journal with gear (1) adjacent both sides running in bearingss (2) on the described gear shaft is coniform bearing journal (3), coniform bearing journal (3) end face diameter of contiguous gear end is less than Outside diameter.
2. oil pump gear according to claim 1 is characterized in that, coniform bearing journal (3) end face diameter of described contiguous gear end and Outside diameter footpath are poor to be 0.03mm～0.06mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200737743U CN202441598U (en) | 2012-02-26 | 2012-02-26 | Oil pump gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200737743U CN202441598U (en) | 2012-02-26 | 2012-02-26 | Oil pump gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202441598U true CN202441598U (en) | 2012-09-19 |
Family
ID=46823050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200737743U Expired - Fee Related CN202441598U (en) | 2012-02-26 | 2012-02-26 | Oil pump gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202441598U (en) |
-
2012
- 2012-02-26 CN CN2012200737743U patent/CN202441598U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20140226 |