CN203730309U - Lower shaft for hydraulic pump - Google Patents
Lower shaft for hydraulic pump Download PDFInfo
- Publication number
- CN203730309U CN203730309U CN201420110354.7U CN201420110354U CN203730309U CN 203730309 U CN203730309 U CN 203730309U CN 201420110354 U CN201420110354 U CN 201420110354U CN 203730309 U CN203730309 U CN 203730309U
- Authority
- CN
- China
- Prior art keywords
- boss
- lug boss
- shaft
- hydraulic pump
- lower 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to a lower shaft for a hydraulic pump. The lower shaft for the hydraulic pump comprises a center shaft, wherein a base circle shaft is arranged outside the center shaft, a convex circular shaft is arranged on the outer side of the base circle shaft, a first lug boss is arranged at the front end of the center shaft, a second lug boss is arranged at the front end of the first lug boss, a third lug boss is arranged at the front end of the second lug boss, the diameters of the first lug boss, the second lug boss and the third lug boss decrease in sequence, a fourth lug boss and a fifth lug boss are in sequence arranged at the rear end of the center shaft, and keyways are formed in the centers of the second lug boss and the fifth lug boss. The lower shaft of the hydraulic pump adopts the improvement measures, and has the obvious benefits that the lower shaft and an upper shaft are matched to realize linear sealing and the sealing effect is good; frequencies of water inflow and inner leakage are reduced; the outer side is matched with the inner hole of the work chamber of a pump case through the convex circular shaft, the friction is small, and the service life is long.
Description
Technical field
The utility model relates to a kind of lower shaft for oil hydraulic pump.
Background technique
Oil hydraulic pump is a kind of common device that the mechanical energy of power engine (as motor and internal-combustion engine etc.) is converted to the pressure energy of liquid, similar oil hydraulic pump mandrel or spiral or gear or eccentric processing complexity, and in same volume, discharge capacity is little, and require high to fluid viscosity.
Model utility content
For the problems referred to above, the utility model provides a kind of lower shaft for oil hydraulic pump, can serve as scraper plate effect, realizes water inlet is scraped to water outlet, manufacture simply, and convenient for maintaining, efficiency is high.
The utility model is achieved through the following technical solutions: a kind of lower shaft for oil hydraulic pump, comprise central shaft, described central shaft outside is basic circle axle, described basic circle axle arranged outside has dome axle, described central shaft front end is provided with the first boss, described the first boss front end is provided with the second boss, described the second boss front end is provided with the 3rd boss, the first boss, the second boss, the 3rd boss diameter reduce successively, described central shaft rear end is provided with the 4th boss, the 5th boss successively, the center of described the second boss is shaped with keyway, and described the 5th boss center is shaped with keyway.Central shaft and basic circle axle can be to mill out dome after first entirety; Also can be first basic circle axle outside be milled out to dome, then with central shaft interference fit.This lower shaft is installed in the pump case that there is no dividing plate, cooperatively interact and realize the conveying of water inlet and outlet with upper axle, it is more firm that more piece boss can make that lower shaft is connected with pump case or other connected elements, and front end keyway is for follow-up fixed gear, and rear end keyway is for follow-up fast pulley.
As preferably, described dome axle is divided equally three equal parts.
The utility model has taked above-mentioned corrective measure to carry out, and its beneficial effect is remarkable: this lower shaft coordinates and realizes linear sealing with upper axle, and good sealing effect reduces in water inlet and leaks, and outside coordinates with pump case working room endoporus by dome axle, rub little, and long service life.
Brief description of the drawings
Fig. 1 is the utility model embodiment 1 structural representation;
In figure, 1 is basic circle axle, the 2nd, and central shaft, the 3rd, dome axle, 4 is first boss, and 5 is second boss, and 6 is the 3rd boss, the 7th, keyway, 8 is the 4th boss, 9 is the 5th boss.
Embodiment
Contrast accompanying drawing is below further described the utility model in conjunction with the embodiments:
Shown in Fig. 1, a kind of lower shaft for oil hydraulic pump, comprise central shaft 2, central shaft 2 outsides are basic circle axle 1, basic circle axle 1 arranged outside has dome axle 3, dome axle 3 is divided equally three equal parts, central shaft 2 front ends are provided with the first boss 4, described the first boss 4 front ends are provided with the second boss 5, described the second boss 5 front ends are provided with the 3rd boss 6, the first boss 4, the second boss 5, the 3rd boss 6 diameters reduce successively, central shaft 2 rear ends are provided with the 4th boss 8 successively, the 5th boss 9, the 4th boss 8, the 5th boss 9 diameters reduce gradually, wherein the center of the second boss 5 of front end and the 5th boss 9 of rear end is all shaped with keyway 7.
What more than enumerate is only specific embodiment of the utility model; obviously; the utility model is not limited to above embodiment, and all distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model, all should belong to protection domain of the present utility model.
Claims (2)
1. the lower shaft for oil hydraulic pump, comprise central shaft, it is characterized in that, described central shaft outside is basic circle axle, described basic circle axle arranged outside has dome axle, described central shaft front end is provided with the first boss, described the first boss front end is provided with the second boss, described the second boss front end is provided with the 3rd boss, the first boss, the second boss, the 3rd boss diameter reduce successively, described central shaft rear end is provided with the 4th boss, the 5th boss successively, and the center of described the second boss is shaped with keyway, and described the 5th boss center is shaped with keyway.
2. the lower shaft for oil hydraulic pump according to claim 1, is characterized in that, described dome axle is divided equally three equal parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420110354.7U CN203730309U (en) | 2014-03-12 | 2014-03-12 | Lower shaft for hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420110354.7U CN203730309U (en) | 2014-03-12 | 2014-03-12 | Lower shaft for hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730309U true CN203730309U (en) | 2014-07-23 |
Family
ID=51200388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420110354.7U Expired - Lifetime CN203730309U (en) | 2014-03-12 | 2014-03-12 | Lower shaft for hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730309U (en) |
-
2014
- 2014-03-12 CN CN201420110354.7U patent/CN203730309U/en not_active Expired - Lifetime
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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: 20140723 |
|
| CX01 | Expiry of patent term |