CN203477848U - Small-sized gear type oil pump - Google Patents
Small-sized gear type oil pump Download PDFInfo
- Publication number
- CN203477848U CN203477848U CN201320568457.3U CN201320568457U CN203477848U CN 203477848 U CN203477848 U CN 203477848U CN 201320568457 U CN201320568457 U CN 201320568457U CN 203477848 U CN203477848 U CN 203477848U
- Authority
- CN
- China
- Prior art keywords
- gear
- oil pump
- shaft
- gear shaft
- installation sleeve
- 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 small-sized gear type oil pump which mainly solves the problem that an existing oil pump is low in machining efficiency and high in machining cost. The small-sized gear type oil pump is characterized in that a pump shell (1) is of a structure formed by two bodies which are combined in a buckled mode, a circular gear chamber (11) and a gear shaft installation sleeve (12) shaped like a straight cylinder are arranged on the pump shell (1), the gear shaft installation sleeve (12) is located on the tangent line of the gear chamber (11), a gear shaft (2) is composed of a center shaft (21) and a plastic gear (22), the plastic gear (22) is arranged on the center shaft (21) in an injection molding mode, the gear shaft (2) is installed in the gear shaft installation sleeve (12), and one end of the gear shaft (2) extends out. Because the plastic gear and the transmission shaft are integrally formed in an injection molding mode, the small-sized gear type oil pump has the advantages of being high in machining efficiency and low in machining cost.
Description
Technical field
The utility model relates to a kind of oil pump, is specifically related to a kind of miniature gear formula oil pump.
Background technique
Oil pump is for engine oil pressure being raise and guaranteeing that certain oil mass is to the device of each friction surface pressure fuel feeding, oil pump is mainly divided into gear type oil pump and rotor-type oil pump, gear type oil pump is wherein simple in structure, easy to process, reliable operation, long service life, pump oil pressure is high, is used widely.Gear type oil pump comprises pump case, driving gear and driven gear, driving gear is connected with external power supply by main drive shaft, with transmitting torque, make oil pump work, for some miniature gasoline engines, because overall structure is less, the structure space of oil pump is also restricted, conventionally driving gear and main drive shaft are processed into integral structure, gear shaft structure namely, gear shaft generally adopts metal to process, need the machine adding methods such as gear hobbing, gear shaping or mill teeth to complete adding man-hour profile of tooth, work efficiency is low, and processing cost is high.
Model utility content
In order to overcome the deficiency that existing oil pump work efficiency is low and processing cost is high, the utility model provides a kind of miniature gear formula oil pump, this miniature gear formula oil pump adopts plastic gear and transmission shaft to be injected into the structure of one, has the advantages that work efficiency is high and processing cost is low.
The technical solution of the utility model is: a kind of miniature gear formula oil pump comprises pump case and gear shaft, pump case is two body structures that mutually fasten, pump case is provided with gear chamber and gear shaft installation sleeve, gear chamber is circular, gear shaft installation sleeve is straight tube shape, and gear shaft installation sleeve is positioned at the tangent position of gear chamber; Gear shaft is comprised of central shaft and plastic gear, and plastic gear is injection-moulded on central shaft, and gear shaft is arranged in gear shaft installation sleeve and stretch out one end.
The central shaft end of described gear shaft external part is flat axle.
Described pump case is provided with mounting ear, on mounting ear with through hole.
Described mounting ear be 2 and be located at respectively gear chamber and gear shaft installation sleeve on.
The utlity model has following beneficial effect: owing to taking such scheme, pump shell structure is simple, be convenient to processing.Plastic gear combines by mode and the central shaft of injection moulding, while using on some put-puts, can meet performance requirement, has effectively improved work efficiency, has reduced processing cost.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is structural representations of Fig. 1 middle gear axle 2.
1-pump case in figure, 11-gear chamber, 12-gear shaft installation sleeve, 13-mounting ear, 2-gear shaft, 21-central shaft, 22-plastic gear.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
By Fig. 1 in conjunction with shown in Fig. 2, a kind of miniature gear formula oil pump comprises pump case 1 and gear shaft 2, pump case 1 is two body structures that mutually fasten, pump case 1 is provided with gear chamber 11 and gear shaft installation sleeve 12, gear chamber 11 is circular, gear shaft installation sleeve 12 is straight tube shape, and gear shaft installation sleeve 12 is positioned at the tangent position of gear chamber 11; Gear shaft 2 is comprised of central shaft 21 and plastic gear 22, and plastic gear 22 is injection-moulded on central shaft 21, and gear shaft 2 is arranged in gear shaft installation sleeve 12 and stretch out one end.Owing to taking such scheme, pump case 1 is simple in structure, is convenient to processing.Plastic gear 22 combines by mode and the central shaft 21 of injection moulding, while using on some put-puts, can meet performance requirement, has effectively improved work efficiency, has reduced processing cost.
Described pump case 1 is provided with mounting ear 13, on mounting ear 13 with through hole.The through hole passing on mounting ear 13 by screw is installed fixing to this oil pump.
Described mounting ear 13 be 2 and be located at respectively gear chamber 11 and gear shaft installation sleeve 12 on.The quantity of mounting ear 13 and position also can be designed according to the space of mounting point.
Claims (4)
1. a miniature gear formula oil pump, comprise pump case (1) and gear shaft (2), it is characterized in that: two body structures of pump case (1) for mutually fastening, pump case (1) is provided with gear chamber (11) and gear shaft installation sleeve (12), gear chamber (11) is circular, gear shaft installation sleeve (12) is straight tube shape, and gear shaft installation sleeve (12) is positioned at the tangent position of gear chamber (11); Gear shaft (2) is comprised of central shaft (21) and plastic gear (22), and it is upper that plastic gear (22) is injection-moulded in central shaft (21), and gear shaft (2) is arranged in gear shaft installation sleeve (12) and stretch out one end.
2. a kind of miniature gear formula oil pump according to claim 1, is characterized in that: central shaft (21) end of described gear shaft (2) external part is flat axle.
3. a kind of miniature gear formula oil pump according to claim 1 and 2, is characterized in that: described pump case (1) is provided with mounting ear (13), and mounting ear (13) is upper with through hole.
4. a kind of miniature gear formula oil pump according to claim 3, is characterized in that: described mounting ear (13) be 2 and be located at respectively gear chamber (11) and gear shaft installation sleeve (12) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320568457.3U CN203477848U (en) | 2013-09-12 | 2013-09-12 | Small-sized gear type oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320568457.3U CN203477848U (en) | 2013-09-12 | 2013-09-12 | Small-sized gear type oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203477848U true CN203477848U (en) | 2014-03-12 |
Family
ID=50226178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320568457.3U Expired - Fee Related CN203477848U (en) | 2013-09-12 | 2013-09-12 | Small-sized gear type oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203477848U (en) |
-
2013
- 2013-09-12 CN CN201320568457.3U patent/CN203477848U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140912 |
|
| EXPY | Termination of patent right or utility model |