CN201502858U - Oil pump for cylinder shaft driver - Google Patents
Oil pump for cylinder shaft driver Download PDFInfo
- Publication number
- CN201502858U CN201502858U CN200920065899XU CN200920065899U CN201502858U CN 201502858 U CN201502858 U CN 201502858U CN 200920065899X U CN200920065899X U CN 200920065899XU CN 200920065899 U CN200920065899 U CN 200920065899U CN 201502858 U CN201502858 U CN 201502858U
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- shaft
- oil pump
- driving gear
- driving 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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- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
An oil pump for a cylinder shaft driver comprises a driving shaft (1), an outer rotor (2), an inner rotor (3), a pump body (4), a pump cover (5) and a driving gear (6). The driving shaft (1) is of a cylinder shape, i.e., the driving shaft (1) is provided with neither a threaded step section nor a key slot or a keyway. The driving shaft (1) is installed in shaft holes of the pump (4) and the pump cover (5). The inner rotor (3) is sheathed on the middle part of the driving shaft (1) via a shaft hole thereon. The shaft hole of the inner rotor (3) is in interference fit with the driving shaft (1). The driving gear (6) is sheathed on the external end of the driving shaft (1) via a shaft hole thereon. The shaft hole of the driving gear (6) is in interference fit with the driving shaft (1). The utility model can promote the moving reliability, safety and cutting resistance of the driving shaft of the oil pump and can decrease the heavy accident due to poor quality.
Description
Technical field
The utility model relates to a kind of oil pump of engine lubrication system, particularly a kind of cylinder axis driver oil pump that can improve reliability, Security and the shear resistance of transmission shaft motion.
Background technique
As shown in Figure 1, it is present and the supporting a kind of oil pump of engine lubrication system, it comprises transmission shaft 1, external rotor 2, internal rotor 3, the pump housing 4, pump cover 5, driving gear 6, lateral pin 7, key 8, plain washer 9, spring washer 10 and hexagon nut 11, transmission shaft 1 is installed in the axis hole of the pump housing 4 and pump cover 5, be equipped with the fixed internal rotor 3 of lateral pin 7 rivetings at the middle part of transmission shaft 1, the spindle nose stepped portions of transmission shaft 1 is equipped with key 8 and driving gear 6, and the outer end of transmission shaft 1 also is equipped with driving gear 6 is pressed on plain washer 9 on the step of transmission shaft 1, spring washer 10 and nut 11.When this oil pump turned round, its driving torque drove by the key in the keyway 8 by driving gear 6; Simultaneously, the internal rotor 3 at the middle part of transmission shaft 1 transmits flywheel moment by lateral pin 7, realizes the normal operation of oil pump.Its deficiency is: because the microseism that driving gear 6 is produced when driving transmission shaft 1, and the effect of cross shear, cause the spindle nose step root stress of transmission shaft 1 to concentrate and fracture; Perhaps because of keyway bursts apart, and internal rotor 3 splits and lateral pin 7 such as is cut off at quality problems, and causes serious accident.
Summary of the invention
The purpose of this utility model is to overcome the deficiency on the prior art and a kind of cylinder axis driver oil pump is provided, and reliability, Security and anti-shear ability that it can improve transmission shaft motion of oil pump reduce the generation of serious Accident due to quality.
The technical solution of the utility model is: a kind of cylinder axis driver oil pump, and it comprises transmission shaft, external rotor, internal rotor, the pump housing, pump cover and driving gear; Transmission shaft is installed in the axis hole of the pump housing and pump cover; Internal rotor is contained in the middle part of transmission shaft by the shaft hole sleeve on it, and the axis hole of internal rotor and transmission shaft are interference fit; Driving gear is contained in the outer end of transmission shaft by the shaft hole sleeve on it.
The further technological scheme of the utility model is: the axis hole of driving gear and transmission shaft are interference fit.
The utility model further technological scheme is: transmission shaft is cylindric.
The utility model compared with prior art has following characteristics:
Adopt interference fit between transmission shaft and internal rotor and the driving gear, improved friction torque and driving torque between driving gear, internal rotor and the transmission shaft; Transmission shaft does not have screw thread step section, does not need on the transmission shaft to offer keyway and cotter way yet, has exempted the machining damage of transmission shaft, driving gear and internal rotor, thereby has improved the intensity of transmission shaft, driving gear and internal rotor.The intensity of transmission shaft and internal rotor and driving gear improves and the friction torque therebetween and the raising of driving torque, transmission shaft and internal rotor and driving gear the withstand shocks ability and the shear resistance of load have been strengthened, thereby improved reliability of the present utility model, Security and working life, reduced the generation of serious Accident due to quality.
Below in conjunction with the drawings and specific embodiments detailed structure of the present utility model is further described.
Description of drawings
Fig. 1 is the structural representation of existing oil pump;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Embodiment
As shown in Figure 2, a kind of cylinder axis driver oil pump, it comprises transmission shaft 1, external rotor 2, internal rotor 3, the pump housing 4, pump cover 5 and driving gear 6; Transmission shaft 1 is cylindric, and promptly transmission shaft 1 does not have screw thread step section, does not also need to offer keyway and cotter way on the transmission shaft 1; Transmission shaft 1 is installed in the axis hole of the pump housing 4 and pump cover 5; Internal rotor 3 is contained in the middle part of transmission shaft 1 by the shaft hole sleeve on it, and the axis hole of internal rotor 3 and transmission shaft 1 are interference fit; Driving gear 6 is contained in the outer end of transmission shaft 1 by the shaft hole sleeve on it, and the axis hole of driving gear 6 and transmission shaft 1 are interference fit.
The utility model is not limited to above-mentioned concrete structure, so long as internal rotor 3 just drops within the protection domain of the present utility model with the cylinder axis driver oil pump that driving gear 6 adopts interference fit to be installed on the transmission shaft 1.
Claims (3)
1. cylinder axis driver oil pump, it comprises transmission shaft (1), external rotor (2), internal rotor (3), the pump housing (4), pump cover (5) and driving gear (6); Transmission shaft (1) is installed in the axis hole of the pump housing (4) and pump cover (5); Internal rotor (3) is contained in the middle part of transmission shaft (1) by the shaft hole sleeve on it; Driving gear (6) is contained in the outer end of transmission shaft (1) by the shaft hole sleeve on it; It is characterized in that: the axis hole of internal rotor (3) and transmission shaft (1) are interference fit.
2. cylinder axis driver oil pump according to claim 1 is characterized in that: the axis hole of described driving gear (6) and transmission shaft (1) are interference fit.
3. cylinder axis driver oil pump according to claim 1 and 2 is characterized in that: described transmission shaft (1) is cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920065899XU CN201502858U (en) | 2009-09-09 | 2009-09-09 | Oil pump for cylinder shaft driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920065899XU CN201502858U (en) | 2009-09-09 | 2009-09-09 | Oil pump for cylinder shaft driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201502858U true CN201502858U (en) | 2010-06-09 |
Family
ID=42453791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920065899XU Expired - Fee Related CN201502858U (en) | 2009-09-09 | 2009-09-09 | Oil pump for cylinder shaft driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201502858U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494235A (en) * | 2011-12-13 | 2012-06-13 | 湖南机油泵股份有限公司 | Novel rotor type oil pump |
| CN108953576A (en) * | 2018-09-27 | 2018-12-07 | 湖南机油泵股份有限公司 | A kind of transmission oil pump being avoided that eccentric wear |
-
2009
- 2009-09-09 CN CN200920065899XU patent/CN201502858U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494235A (en) * | 2011-12-13 | 2012-06-13 | 湖南机油泵股份有限公司 | Novel rotor type oil pump |
| CN108953576A (en) * | 2018-09-27 | 2018-12-07 | 湖南机油泵股份有限公司 | A kind of transmission oil pump being avoided that eccentric wear |
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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 |
Granted publication date: 20100609 Termination date: 20170909 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |