CN211203611U - Oil pump - Google Patents
Oil pump Download PDFInfo
- Publication number
- CN211203611U CN211203611U CN201921703317.6U CN201921703317U CN211203611U CN 211203611 U CN211203611 U CN 211203611U CN 201921703317 U CN201921703317 U CN 201921703317U CN 211203611 U CN211203611 U CN 211203611U
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- Prior art keywords
- pump
- limiting valve
- hole
- rotor
- oil
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 45
- 238000005299 abrasion Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A kind of oil pump, including the pump casing, pump cover, pump spindle, drive gear, inner rotor, outer rotor and pressure-limiting valve module set in pump cover that is connected with pump casing detachably, the pressure-limiting valve module includes setting up in the upper limit pressure valve mounting region of pump cover and setting up in the steel ball, spring and fixed part of the pressure-limiting valve mounting region, there are pressure-limiting valve mounting holes on the axial direction of the pressure-limiting valve mounting region, and the aperture of the pressure-limiting valve mounting hole locating in the inboard part is smaller than the aperture locating in the outboard part, the steel ball locates in the outboard part of the pressure-limiting valve mounting hole and sets up near the inboard part, the spring sets up in the pressure-limiting valve mounting hole and locates in the outboard of the steel ball, the inner end contact steel ball of the spring, there is a through hole and the through hole locates in the radial direction of the pressure-limiting valve mounting, inconvenient assembly and easy damage to the engine.
Description
Technical Field
The utility model relates to an oil pump field especially relates to an oil pump.
Background
The oil pump is one of essential tools in a lubricating system, and the oil pump is used for forcibly pressing and conveying oil to the moving surfaces of various parts of an engine after the oil is increased to a certain pressure. In the operation of the engine oil pump, the three factors of pressure, flow and flow rate of lubricating oil at each lubricating part are different from each other in strict meaning, and reliable and reasonable oil supply at each different part is more important. The oil pump has high assembly precision requirement, the pressure limiting valve on the traditional oil pump needs larger installation space, the installation space in the engine is limited, the assembly is inconvenient, and the engine is easy to damage.
SUMMERY OF THE UTILITY MODEL
The purpose of this application embodiment is through providing an oil pump, has solved the required installation space of voltage limiting valve that exists on the traditional oil pump among the prior art great, and the assembly is inconvenient, damages the problem of engine easily.
The embodiment of the application provides various oil pumps, which comprise a pump body, a pump cover detachably connected with the pump body, a pump shaft, a transmission gear, an inner rotor, an outer rotor and a pressure limiting valve assembly arranged on the pump cover,
the pump body comprises a connecting part and a rotor mounting part, a through pump shaft hole is arranged in the connecting part along the axial direction of the connecting part, a rotor cavity is arranged in the rotor mounting part, the rotor cavity is communicated with the pump shaft hole, an interval is arranged between the axis of the rotor cavity and the axis of the pump shaft hole, the pump shaft is arranged in the pump shaft hole, one end of the pump shaft extends out of the pump body and is fixedly connected with a transmission gear, the other end of the pump shaft extends into the rotor cavity and is fixedly connected with an inner rotor, the inner rotor and the outer rotor are both arranged in the rotor cavity, and,
the pump cover is communicated with the pump body after being covered, an oil inlet cavity and an oil outlet cavity are arranged in one side of the pump cover communicated with the pump body, an oil inlet communicated with the oil inlet cavity and an oil outlet communicated with the oil outlet cavity are arranged on the pump cover,
the pressure limiting valve assembly comprises a pressure limiting valve mounting part arranged on the pump cover, a steel ball, a spring and a fixing part, wherein the steel ball, the spring and the fixing part are arranged in the pressure limiting valve mounting part, a pressure limiting valve mounting hole is formed in the pressure limiting valve mounting part in the axial direction, the hole diameter of the pressure limiting valve mounting hole in the inner side part is smaller than that of the outer side part, the steel ball is located in the outer side part of the pressure limiting valve mounting hole and is close to the inner side part, the spring is arranged in the pressure limiting valve mounting hole and is located on the outer side of the steel ball, the inner end of the spring is in contact with the steel ball, a through hole is formed.
In a further improvement of this embodiment, the inner rotor is fixedly secured to the pump shaft by a fixed pin. The inner rotor and the pump shaft are fixed through the fixing pin, so that the inner rotor and the pump shaft can be prevented from moving, and the normal and effective work of the oil pump can be guaranteed.
The further improvement to this embodiment, seted up the mounting hole on the pump cover lies in one side of oil-out, and the axis of mounting hole is parallel with the axis of oil-out. The pump cover is connected with the engine through the mounting hole so as to communicate the oil outlet with an oil duct of the engine.
The pump shaft is sleeved with a shaft sleeve, and the shaft sleeve is positioned at the upper end of the connecting part of the pump body. The shaft sleeve is arranged, so that abrasion between the pump shaft and the pump body is reduced.
In a further improvement of this embodiment, an ear seat is fixedly disposed on the outer wall of the pump body.
In a further improvement of the embodiment, a bolt is also provided,
the pump cover is provided with a first mounting hole, the pump cover is provided with a second mounting through hole in a relatively opened mode, the axis directions of the first mounting hole and the second mounting through hole are parallel to the axis direction of the pump shaft hole, and after the pump body and the pump cover are closed, the bolt is screwed down through the second mounting through hole and the first mounting hole in sequence to fasten the pump body and the pump cover. Set up first mounting hole on the pump body, set up second installation perforating hole on the pump cover, through with in inserting first mounting hole and second installation perforating hole with the bolt, screw up and fasten, realize the connection of dismantling between the pump body and the pump cover.
In a further development of this embodiment, the fixing element is a cotter pin.
In a further development of this embodiment, a spacer is arranged between the spring and the fixing element. The pressure of the oil pump is adjusted by arranging the gasket.
In a further improvement of this embodiment, the transmission gear is a bevel gear, and the number of teeth of the bevel gear is 11. The number of teeth of the helical gear is reduced, the rotating speed of the engine is improved, and the oil supply amount is increased.
Compared with the prior art, the embodiment of the utility model provides a beneficial effect that can realize is: the traditional pressure limiting valve arrangement mode is changed, and the split pin is arranged to fix the spring in the pressure limiting valve mounting hole, so that the pressure limiting valve assembly is more compact in structure, the mounting space required by the pressure limiting valve assembly in an engine is reduced, the pressure limiting valve assembly is convenient to mount, and the possibility of damaging the engine is greatly reduced.
Drawings
Fig. 1 is a cross-sectional view of an oil pump provided by an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a pump body of an oil pump provided by an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a pump cover of an oil pump provided by the embodiment of the present invention.
Fig. 4 is a cross-sectional view of a pump cover of the oil pump provided by the embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.
Referring to fig. 1-4, an embodiment of the present invention provides an oil pump, including a pump body 3, a pump cover 7 detachably connected to the pump body 3, a pump shaft 1, a transmission gear 2, an inner rotor 4, an outer rotor 5, a bolt 11, and a pressure limiting valve assembly disposed on the pump cover 7.
The pump body 3 includes connecting portion 31 and rotor installation portion 32, a pump shaft hole 311 that link up is seted up along the axial direction of connecting portion 31 in the connecting portion 31 inside, rotor cavity 321 has been seted up in the rotor installation portion 32, rotor cavity 321 communicates with each other with pump shaft hole 311, and there is the interval between the axis of rotor cavity 321 and the axis of pump shaft hole 311 to make inner rotor and outer rotor can take place to rotate each other, pump shaft 1 sets up in pump shaft hole 311, the one end of pump shaft 1 stretches out the pump body 3 and fixed connection drive gear 2, the other end of pump shaft 1 stretches into in rotor cavity 321 and inner rotor 4 fixed connection, inner rotor 4 and outer rotor 5 all set up in rotor cavity 321, and inner rotor 4 is located outer rotor 5, inner rotor 4 and outer rotor 5 intermeshing. Helical gear in this embodiment, and the number of teeth of helical gear is 11, and current helical gear number of teeth generally adopts 12, and this embodiment is through reducing the number of teeth of helical gear for the rotational speed of the engine that is connected with it improves, with the increase fuel feeding volume.
In this embodiment, the inner rotor 4 is fixedly sleeved on the pump shaft 1 through a fixing pin 6, so as to prevent the inner rotor and the pump shaft from rotating relatively, thereby ensuring that the oil pump can work normally and effectively.
In this embodiment, a shaft sleeve 9 is sleeved on the pump shaft 1, and the shaft sleeve 9 is located at the upper end of the connecting portion 31 of the pump body 3. The arrangement of the shaft sleeve can reduce abrasion between the pump shaft and the pump body and prolong the service life of the oil pump.
In this embodiment, an ear seat 10 is fixedly disposed on the outer wall of the pump body 3. When in use, the oil pump can be fixed by the ear seat.
The rotor mounting portion 32 of the pump body 3 is provided with a first mounting hole 322, the pump cover 7 is provided with a second mounting through hole 76, and the axial directions of the first mounting hole 322 and the second mounting through hole 76 are both parallel to the axial direction of the pump shaft hole 311. In this embodiment, there are 4 first mounting holes 322 and 4 second mounting through holes 76. After the pump body 3 and the pump cover 7 are closed, the 4 bolts 11 are respectively screwed down through the second mounting through holes 76 and the corresponding first mounting holes 322 in sequence, so that the pump body 3 and the pump cover 7 are fixed.
Referring to fig. 3 and 4, the pump cover 7 is covered and communicated with the pump body 3, an oil inlet cavity 71 and an oil outlet cavity 72 are formed in one side of the pump cover 7 communicated with the pump body 3, and an oil inlet 73 communicated with the oil inlet cavity 71 and an oil outlet 74 communicated with the oil outlet cavity 72 are formed in the pump cover 7.
The pressure limiting valve assembly comprises an upper pressure limiting valve mounting part 8 arranged on the pump cover 7 and a steel ball 82 arranged in the pressure limiting valve mounting part 8, the pressure limiting valve mounting structure comprises a spring 83 and a fixing piece 84, wherein a pressure limiting valve mounting hole 81 is formed in the pressure limiting valve mounting portion 8 in the axial direction, the axis of the pressure limiting valve mounting hole 81 is perpendicular to the axis of a pump shaft hole 311, the aperture of the inner portion of the pressure limiting valve mounting hole 81 is smaller than that of the outer portion of the pressure limiting valve mounting hole 81, a steel ball 82 is located on the outer portion of the pressure limiting valve mounting hole 81 and is close to the inner portion of the pressure limiting valve mounting hole, the spring 83 is arranged in the pressure limiting valve mounting hole 81 and is located on the outer side of the steel ball 82, the inner end of the spring 83 contacts with the steel ball 82, the inner diameter of the spring 83 is smaller than the outer diameter of the steel ball 82, a through hole 811 is.
In this embodiment, the fixing member is a cotter, after the steel ball 82 and the spring 83 are installed, the two leg ends of the cotter are passed through the through hole 811, then the two legs are pulled apart and bent to prevent the cotter from falling out of the through hole 811, and the spring can be limited in the pressure limiting valve installation hole 81 by arranging the cotter to prevent the spring from popping out. The pressure limiting valve assembly is different from the traditional arrangement mode, and the spring is fixed in the pressure limiting valve mounting hole 81 through the split pin, so that the size of the pressure limiting valve can be effectively reduced, the mounting space required by the pressure limiting valve assembly in an engine is reduced, and the pressure limiting valve assembly is convenient to mount.
In this embodiment, a spacer is provided between the spring 83 and the cotter pin. In actual need, different quantity of gaskets can be arranged according to needs, so that the pressure of the oil pump can be adjusted.
An installation hole 75 is formed in one side of the pump cover 7, which is located at the oil outlet 74, and the axial direction of the installation hole 75 is parallel to the axial direction of the oil outlet 74. In this embodiment, 2 mounting holes 75 are formed. The oil pump is connected to the engine through the mounting hole such that an oil outlet 74 of the oil pump communicates with an oil passage of the engine.
The utility model discloses the part that does not relate to all is the same with prior art or adopts prior art to realize.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (9)
1. An oil pump, characterized in that: comprises a pump body (3), a pump cover (7) detachably connected with the pump body (3), a pump shaft (1), a transmission gear (2), an inner rotor (4), an outer rotor (5) and a pressure limiting valve component arranged on the pump cover (7),
the pump body (3) comprises a connecting part (31) and a rotor mounting part (32), a through pump shaft hole (311) is formed in the connecting part (31) along the axial direction of the connecting part (31), a rotor cavity (321) is formed in the rotor mounting part (32), the rotor cavity (321) is communicated with the pump shaft hole (311), an interval is formed between the axis of the rotor cavity (321) and the axis of the pump shaft hole (311), the pump shaft (1) is arranged in the pump shaft hole (311), one end of the pump shaft (1) extends out of the pump body (3) and is fixedly connected with the transmission gear (2), the other end of the pump shaft (1) extends into the rotor cavity (321) and is fixedly connected with the inner rotor (4), the inner rotor (4) and the outer rotor (5) are both arranged in the rotor cavity (321), and the inner rotor (4) and the outer rotor (5) are,
the pump cover (7) is communicated with the pump body (3) after being covered, one side of the pump cover (7) communicated with the pump body (3) is internally provided with an oil inlet cavity (71) and an oil outlet cavity (72), the pump cover (7) is provided with an oil inlet (73) communicated with the oil inlet cavity (71) and an oil outlet (74) communicated with the oil outlet cavity (72),
the pressure limiting valve assembly comprises a pressure limiting valve mounting part (8) arranged on the pump cover (7), a steel ball (82), a spring (83) and a fixing part (84) which are arranged in the pressure limiting valve mounting part (8), a pressure limiting valve mounting hole (81) is arranged in the axial direction of the pressure limiting valve mounting part (8), the aperture of the pressure limiting valve mounting hole (81) located in the inner side portion is smaller than that of the outer side portion, the steel ball (82) is located in the outer side portion of the pressure limiting valve mounting hole (81) and is arranged close to the inner side portion, the spring (83) is arranged in the pressure limiting valve mounting hole (81) and located on the outer side of the steel ball (82), the inner end of the spring (83) is in contact with the steel ball (82), a through hole (811) is formed in the radial direction of the pressure limiting valve mounting portion (8), the through hole (811) is located on the outer side of the spring (83), and the fixing piece (84) penetrates through the through hole (811) to fix the spring (83) in the pressure limiting.
2. An oil pump according to claim 1, characterized in that: the inner rotor (4) is fixedly sleeved on the pump shaft (1) through a fixing pin (6).
3. An oil pump according to claim 1, characterized in that: a mounting hole (75) is formed in one side, located at the oil outlet (74), of the pump cover (7), and the axis of the mounting hole (75) is parallel to the axis of the oil outlet (74).
4. An oil pump according to claim 1, characterized in that: a shaft sleeve (9) is sleeved on the pump shaft (1), and the shaft sleeve (9) is positioned at the upper end of the connecting part (31) of the pump body (3).
5. An oil pump according to claim 1, characterized in that: an ear seat (10) is fixedly arranged on the outer wall of the pump body (3).
6. An oil pump according to claim 1, characterized in that: a bolt (11) is also provided,
first mounting hole (322) have been seted up on rotor installation department (32) of the pump body (3), relatively open on pump cover (7) is equipped with second installation perforating hole (76), the axis direction of first mounting hole (322) and second installation perforating hole (76) all parallels with the axis direction of pump shaft hole (311), the pump body (3) closes the back with pump cover (7) lid, pass second installation perforating hole (76) and first mounting hole (322) with bolt (11) in proper order and screw up in order to fasten pump body (3) and pump cover (7).
7. An oil pump according to claim 1, characterized in that: the fixing member (84) is a cotter pin.
8. An oil pump according to claim 1, characterized in that: a spacer is provided between the spring (83) and the fixing member (84).
9. An oil pump according to claim 1, characterized in that: the transmission gear (2) is a helical gear, and the number of teeth of the helical gear is 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921703317.6U CN211203611U (en) | 2019-10-12 | 2019-10-12 | Oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921703317.6U CN211203611U (en) | 2019-10-12 | 2019-10-12 | Oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211203611U true CN211203611U (en) | 2020-08-07 |
Family
ID=71888966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921703317.6U Active CN211203611U (en) | 2019-10-12 | 2019-10-12 | Oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211203611U (en) |
-
2019
- 2019-10-12 CN CN201921703317.6U patent/CN211203611U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |