CN213176017U - Plunger pump and camshaft thereof - Google Patents
Plunger pump and camshaft thereof Download PDFInfo
- Publication number
- CN213176017U CN213176017U CN202021789602.7U CN202021789602U CN213176017U CN 213176017 U CN213176017 U CN 213176017U CN 202021789602 U CN202021789602 U CN 202021789602U CN 213176017 U CN213176017 U CN 213176017U
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- CN
- China
- Prior art keywords
- camshaft
- cam
- chamber
- support bearing
- pump
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 21
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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Abstract
The application provides a plunger pump and camshaft thereof, the plunger pump includes low pressure subassembly and high pressure subassembly, the high pressure subassembly includes the pump casing, camshaft chamber and oil delivery pump chamber have been seted up in the pump casing, the camshaft part is acceptd and is partly outstanding to the oil delivery pump chamber in the camshaft chamber, be provided with support bearing between camshaft chamber and the oil delivery pump chamber, support bearing sleeve arranges the camshaft in, the clearance has between its inner peripheral face and the outer peripheral face of camshaft, be provided with the cam on the camshaft, support bearing supports in the cam side in the axial, the ditch through groove in intercommunication clearance and camshaft chamber has on the cam. The application can improve the lubricating effect.
Description
Technical Field
The application relates to the field of hydraulic pressure, in particular to a plunger pump and a camshaft thereof.
Background
Plunger pumps are hydraulic devices often used in the hydraulic field. Referring to fig. 1 and 2, a prior art plunger pump 1 includes a high pressure assembly and a low pressure assembly, the high pressure assembly includes a pump housing 10, and a plurality of chambers including a camshaft chamber 11, an oil pump chamber 12 and a plunger chamber 13 are provided in the pump housing 10. A camshaft 20 is partially disposed in the camshaft chamber 11 and partially protrudes into the oil pump chamber 12, and an oil pump, typically a gear pump or a vane pump, is disposed in the oil pump chamber 12. A support bearing 30 is provided between the camshaft chamber 11 and the oil delivery pump chamber 12, and the support bearing 30 is supported by a portion of the pump housing 10 and separates the camshaft chamber 11 from the oil delivery pump chamber 12. A cam 21 is provided on the camshaft 20, and a support bearing 30 is supported on one side in the axial direction by the pump housing 10 or the oil pump and on the other side by the cam 21. A lubricating oil hole 301 is provided in the support bearing 30. The lubricating oil can be conducted to the gap between the support bearing 30 and the camshaft 20 through the above-described lubricating oil hole 301, thereby lubricating the support bearing 30 and reducing the temperature there by the lubricating oil.
However, since the side of the support bearing 30 abuts against the side of the cam 21, there is only a slight gap between the support bearing and the side, and the lubricant is not easily flowed out from the gap, so that the lubricant between the support bearing and the cam shaft cannot be effectively renewed, and the temperature of the place is not easily lowered.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem among the prior art can be solved to the purpose of plunger pump and camshaft thereof.
For accomplishing above-mentioned application purpose, the present application provides a plunger pump, including low pressure subassembly and high pressure subassembly, high pressure subassembly includes the pump casing set up camshaft chamber and oil transportation pump chamber in the pump casing, camshaft portion accept in camshaft chamber part is outstanding extremely the oil transportation pump chamber, camshaft chamber with be provided with support bearing between the oil transportation pump chamber, support bearing sleeve arranges in on the camshaft, the clearance has between the outer peripheral face of its inner peripheral face and camshaft, be provided with the cam on the camshaft, support bearing support in the axial the cam side, the intercommunication has on the cam the groove in clearance and camshaft chamber.
The present application further has a feature that a step portion is formed on one side of the cam facing the support bearing, and the communication groove is provided in the step portion.
This application still has following characteristic, the groove leads to the groove intercommunication the clearance extremely the outer periphery of camshaft.
The present application also features the grooved channel being a tunnel formed in the interior of the cam or a groove on the side of the cam facing the support bearing.
This application still has following characteristic, the cam with be provided with the gasket between the support bearing, the groove set up with on the gasket.
This application still has following characteristic, the groove leads to the groove and has a plurality ofly, a plurality of grooves lead to groove along circumference evenly distributed on the cam.
The present application also has a feature that a lubricating oil hole communicating the clearance with the camshaft cavity is provided on the circumferential surface of the support bearing.
The present application also features the support bearing supported to the pump housing.
The present application also features an oil transfer pump disposed in the oil transfer pump chamber.
The present application further provides a camshaft having a cam thereon with a grooved channel on a side of the cam facing the side for mounting the fuel delivery pump.
By using the technical scheme provided by the application, a better lubricating effect can be provided.
Drawings
Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, it being understood that the following description of the embodiments is only for the purpose of explanation and not limitation of the scope of the present application, and in the accompanying drawings:
fig. 1 is a schematic view of a plunger pump.
Fig. 2 is an enlarged view of a portion of the structure of the plunger pump, showing the structure of the support bearing and the camshaft portion in the prior art.
Fig. 3 is an enlarged schematic view of a part of the structure of the plunger pump for showing the structure of the support bearing and the camshaft portion in one embodiment of the plunger pump of the present application.
FIG. 4 is a schematic structural view of an embodiment of a camshaft of the present application.
FIG. 5 is a side view of the camshaft illustrated in FIG. 4.
The reference numbers are as follows:
Pump housing 10
Camshaft cavity 11
Oil transfer pump chamber 12
Camshaft 20
Cam 21
Groove 211
Support bearing 30
Lubricating oil hole 301
Detailed Description
It should be understood that the drawings are for illustrative purposes only and are not intended to limit the application.
Referring to fig. 1, 3, 4 and 5, a plunger pump 1 of the present application includes a low pressure component and a high pressure component. The low pressure assembly typically includes a fuel transfer pump, which in this embodiment is a vane pump, and in other embodiments may be a gear pump, which is used to transfer fuel into the high pressure assembly. The high-pressure assembly comprises a pump shell 10, and the pump shell 10 is provided with a plurality of cavities, including a camshaft cavity 11, an oil delivery pump cavity 12 and a plunger cavity 13. In the present embodiment, the low pressure assembly is integrated within the pump housing 10. The camshaft 20 is partially disposed in the camshaft chamber 11, and partially protrudes from the camshaft chamber 11 into the oil pump chamber 12. The camshaft cavity 11 has lubricating oil therein to provide lubrication between the camshaft 20 and other components as the camshaft 20 rotates. The camshaft 20 may be keyed to the motor so that the camshaft performs rotational motion within the camshaft cavity.
A support bearing 30 is provided between the camshaft chamber 11 and the oil delivery pump chamber 12. The support bearing 30 is fitted over the camshaft 20, and the camshaft 20 is freely rotatable within the bush of the support bearing 30. A gap is formed between the support bearing 30 and the camshaft, and a lubricating oil hole 301 is formed on the circumferential surface of the support bearing 30, and the lubricating oil hole 301 can transmit lubricating oil to the gap between the support bearing 30 and the camshaft 20, thereby forming a lubricating oil film between the support bearing 30 and the camshaft 20. In fig. 2 and 3, the lubricating oil hole 301 is provided at the downward arrow shown.
In some embodiments including this embodiment, the cam shaft 20 is provided with a cam 21, the cam 21 is provided with 4 uniformly arranged through grooves 211, and the through grooves 211 communicate the gap between the support bearing 30 and the cam shaft 20 and the cam shaft cavity 11. Therefore, the lubricating oil can flow out from between the self-supporting bearing 30 and the cam 21, and after the lubricating oil flows out, new lubricating oil enters the gap from the lubricating oil hole 301, and the lubricating effect is ensured by referring to the schematic diagram of the flowing of the lubricating oil shown by an arrow in the figure.
In other embodiments, the camshaft and plunger pump of the present application have different variations. For example, the communication groove 211 may be a hole provided in the cam 21 or a groove formed recessed from the side of the cam 21 facing the support bearing, as long as it can effectively conduct the lubricating oil. In the present embodiment, the cam 21 has a step portion 22, the step portion 22 is regarded as a part of the cam, and the communication groove 211 of the present application is provided on a side surface of the step portion 22. The through groove 211 may penetrate the outer peripheral surface of the cam 21 or the step 22, or may partially penetrate the outer peripheral surface, as long as the through groove 211 can effectively communicate the gap with the camshaft cavity 11. The through grooves 211 may be single or plural, and are preferably uniformly arranged on the cam side in the radial direction.
In some embodiments including this embodiment, the pump housing 10 is integrally formed, but in other embodiments, the pump housing 10 may be separately formed and then integrally connected by using a connection mechanism.
In some other embodiments, a spacer may be provided between the cam 21 and the support bearing, and the aforementioned recess or aperture may be provided in the spacer.
Of course, other embodiments of the present application are also possible, and the present application is not limited to the embodiments described above.
Claims (10)
1. The utility model provides a plunger pump, includes low pressure subassembly and high pressure subassembly, the high pressure subassembly includes pump casing (10) set up camshaft chamber (11) and oil delivery pump chamber (12) in pump casing (10), camshaft (20) part accept in camshaft chamber (11) part is outstanding to oil delivery pump chamber (12), camshaft chamber (11) with be provided with support bearing (30) between oil delivery pump chamber (12), support bearing (30) cover is arranged in on camshaft (20), has the clearance between its inner peripheral face and the outer peripheral face of camshaft (20), be provided with cam (21) on camshaft (20), support bearing (30) in the axial support in cam (21) side, its characterized in that: the cam (21) is provided with a communication groove (211) which is communicated with the gap and the camshaft cavity (11).
2. The plunger pump according to claim 1, characterized in that a side of the cam (21) facing the support bearing (30) is formed with a stepped portion (22), and the through groove (211) is provided to the stepped portion (22).
3. The plunger pump according to claim 1 or 2, characterized in that the groove (211) communicates the gap to the outer circumferential surface of the camshaft (20).
4. Plunger pump according to claim 1 or 2, characterised in that the through-going groove (211) is a duct formed inside the cam (21) or a groove on the side of the cam (21) facing the support bearing (30).
5. Plunger pump according to claim 1, characterised in that a spacer is arranged between the cam (21) and the support bearing (30), the through-groove (211) being arranged in contact with the spacer.
6. Plunger pump according to claim 1 or 2, characterised in that the through-groove (211) has a plurality, the through-grooves (211) being evenly distributed in the circumferential direction on the cam (21).
7. The plunger pump according to claim 1 or 2, characterized in that a lubricating oil hole (301) communicating the clearance with the camshaft chamber (11) is provided on the circumferential surface of the support bearing (30).
8. Plunger pump according to claim 1 or 2, characterised in that the support bearing (30) is supported to the pump housing (10).
9. Plunger pump according to claim 1 or 2, characterised in that the oil pump chamber (12) is provided with an oil pump.
10. A camshaft having a cam thereon, characterized in that: the cam has a grooved slot (211) on the side facing the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021789602.7U CN213176017U (en) | 2020-08-25 | 2020-08-25 | Plunger pump and camshaft thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021789602.7U CN213176017U (en) | 2020-08-25 | 2020-08-25 | Plunger pump and camshaft thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213176017U true CN213176017U (en) | 2021-05-11 |
Family
ID=75767068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021789602.7U Active CN213176017U (en) | 2020-08-25 | 2020-08-25 | Plunger pump and camshaft thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213176017U (en) |
-
2020
- 2020-08-25 CN CN202021789602.7U patent/CN213176017U/en active Active
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