CN107289271B - Light oil pump with idle gear - Google Patents
Light oil pump with idle gear Download PDFInfo
- Publication number
- CN107289271B CN107289271B CN201710708542.8A CN201710708542A CN107289271B CN 107289271 B CN107289271 B CN 107289271B CN 201710708542 A CN201710708542 A CN 201710708542A CN 107289271 B CN107289271 B CN 107289271B
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- Prior art keywords
- shaft
- idler
- hole
- oil
- annular gap
- 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.)
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- 239000003921 oil Substances 0.000 claims abstract description 56
- 230000001050 lubricating effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 239000010705 motor oil Substances 0.000 description 8
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides a light oil pump with an idler gear, which comprises an aluminum pump body, a transmission gear, the idler gear, an idler shaft and a bolt, wherein an oil cavity and an idler shaft mounting hole are formed in the pump body; a large shaft section of the idler shaft is installed in a shaft hole of the idler gear, a small shaft section is installed in a circular hole of the pump body, a first annular gap is formed between the end face of the lower end of the small shaft section and the boss, and a lubricating oil channel for communicating the first annular gap and the oil cavity is arranged between the first annular gap and the oil cavity; a screw rod of the bolt penetrates through a bolt mounting hole of the idler shaft and then is screwed into a threaded hole of the pump body, so that the idler shaft is fixed on the pump body, and a second annular gap is formed between the bolt and the inner wall of the bolt mounting hole of the idler shaft; the high-pressure oil in the oil cavity sequentially passes through the lubricating oil channel, the first annular gap, the second annular gap and the lubricating through hole to provide lubrication for the bushing and the idler shaft.
Description
Technical Field
The invention relates to an engine lubricating system component, in particular to an oil pump with an idle gear.
Background
The existing large-displacement oil pump is usually installed in an oil shell below an engine crankcase, a transmission gear of the oil pump is driven by a gear on the engine crankshaft, the engine crankcase is very large, the center distance between a transmission shaft of the oil pump and the crankshaft is relatively large, and on the premise of determining the transmission ratio, if the center distance is matched by simply increasing the diameters of the transmission gear of the oil pump and the gear on the crankshaft, the gear on the crankshaft and the transmission gear of the oil pump are necessarily too large, so the cost is increased, and in addition, the engine does not have enough space for arranging the gear with the large diameter. Therefore, an idle gear must be added between the transmission gear of the oil pump and the crankshaft gear to transmit the driving force of the gear on the crankshaft to the transmission gear of the oil pump, so that the cost can be reduced, and the structure of the engine is more compact.
The idler gear is typically mounted to the pump body by an idler shaft, which in the prior art is essentially a cast iron member, such that the idler shaft can be mounted to the pump body by interference fit. Because the cast iron has the defect of heavy weight, if the material of the pump body is changed into the cast aluminum, although the weight can be reduced, the idler shaft cannot be arranged on the aluminum pump body in an interference fit mode, so a new installation mode and a new structure are needed to be adopted to adapt to the aluminum pump body, and the problems of lubrication and heat dissipation between the inner wall of the shaft hole of the idler gear and the idler shaft need to be solved.
Disclosure of Invention
The invention aims to provide a light oil pump with an idler gear.
In order to solve the technical problems, the invention adopts the following technical scheme: a light oil pump with an idler gear comprises a pump body, a transmission gear, an idler shaft, the idler gear and bolts, wherein the pump body is an aluminum casting, an oil cavity and an idler shaft mounting hole are formed in the pump body, the idler shaft mounting hole is a stepped hole and comprises a round hole in the upper portion and a threaded hole in the lower portion, the diameter of the round hole is larger than that of the threaded hole, and a circle of boss is formed at the joint of the round hole and the threaded hole; the idler shaft is a stepped shaft and comprises a thrust disc, a large shaft section and a small shaft section, the idler shaft is provided with an axial bolt mounting hole penetrating through the idler shaft, and the large shaft section is provided with a lubricating through hole intersected with the bolt mounting hole; the large shaft section of the idler shaft is arranged in a shaft hole of the idler gear, a bushing is arranged between the large shaft section and the inner wall of the shaft hole of the idler gear, and the small shaft section is arranged in a circular hole of the pump body; the length of a small shaft section of the idler shaft is smaller than the depth of the round hole, a first annular gap is formed between the end face of the lower end of the small shaft section and the boss, and a lubricating oil channel for communicating the first annular gap and the oil cavity is arranged between the first annular gap and the oil cavity; a screw rod of the bolt penetrates through a bolt mounting hole of the idler shaft and then is screwed into a threaded hole of the pump body, so that the idler shaft is fixed on the pump body, the diameter of the bolt is smaller than the diameter of the bolt mounting hole of the idler shaft, and a second annular gap is formed between the bolt and the inner wall of the bolt mounting hole of the idler shaft; and high-pressure oil in the oil cavity sequentially passes through the lubricating oil channel, the first annular gap, the second annular gap and the lubricating through hole to lubricate the bushing and the idler shaft.
In the technical scheme, the pump body is an aluminum casting, and the idler gear and the idler shaft are mounted on the pump body through bolts, so that the weight of the pump body is reduced, and the mounting problem between the idler shaft and the pump body is solved. Meanwhile, the length of the small shaft section of the idler shaft is smaller than the depth of the round hole of the idler shaft mounting hole, and the diameter of the bolt is smaller than the aperture of the bolt mounting hole of the idler shaft, so that a first annular gap and a second annular gap are ingeniously formed, and high-pressure oil in the oil cavity sequentially passes through the lubricating oil channel, the first annular gap, the second annular gap and the lubricating through hole to lubricate the bushing and the idler shaft. And then, high-pressure oil can continuously flow to the two ends of the idle gear shaft block through a gap between the idle gear shaft and the shaft hole of the bush, so that the engine oil leaks from the end surfaces of the two shaft blocks of the idle gear and returns to the engine oil shell, the engine oil circulation between the idle gear shaft hole and the idle gear shaft is realized, the lubrication and the heat dissipation can be continuously provided for the idle gear rotating under a large load, and the faults of burning, shaft locking and the like of the idle gear shaft hole and the idle gear shaft are avoided.
The further technical scheme of the invention is as follows: and oil drainage grooves are formed in two end faces of the shaft table of the idle gear.
Preferably, four oil drainage grooves are uniformly distributed on two end faces of the shaft table of the idle gear.
Because the oil drainage groove is formed in the end face of the idler gear shaft table, the flow speed of engine oil between the bushing shaft hole and the large shaft section of the idler shaft can be increased, and the lubricating and heat radiating effects are better.
Preferably, the bushing is in interference fit with the inner wall of the shaft hole of the idler gear.
Preferably, the lubricating through hole on the idler shaft is perpendicularly intersected with the bolt mounting hole.
Preferably, a weight-reducing counter bore is formed in a thrust disc of the idler shaft.
Drawings
Fig. 1 is a schematic diagram of an overall structure of an oil pump in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a pump body according to an embodiment of the present invention;
FIG. 3 is an enlarged view of the structure of portion A in FIG. 1;
FIG. 4 is a schematic view of the construction of an idler gear in an embodiment of the present invention;
the reference signs are:
1-pump body 2-transmission gear 3-idle wheel shaft
4-idler gear 5-bolt 6-bush
7-first annular gap 8-second annular gap 11-oil chamber
12-mounting hole 121 of idle wheel shaft-round hole 122-threaded hole
13-lubricating oil channel 31-lubricating through hole 41-oil drainage groove.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention is further described below with reference to the following examples and the accompanying drawings, which are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
As shown in fig. 1 to 3, the preferred embodiment of the present invention is: a light oil pump with an idler gear comprises a pump body 1, a transmission gear 2, an idler shaft 3, the idler gear 4 and a bolt 5, wherein the pump body 1 is an aluminum casting, an oil cavity 11 and an idler shaft mounting hole 12 are formed in the pump body 1, the idler shaft mounting hole 12 is a stepped hole and comprises a round hole 121 in the upper portion and a threaded hole 122 in the lower portion, the diameter of the round hole 121 is larger than that of the threaded hole 122, and a circle of boss is formed at the connecting position of the round hole 121 and the threaded hole 122; the idler shaft 3 is a stepped shaft and comprises a thrust disc, a large shaft section and a small shaft section, wherein a weight-reducing counter bore is formed in the thrust disc, an axial bolt mounting hole penetrating through the idler shaft 3 is formed in the idler shaft in the whole axial direction, and a lubricating through hole 31 vertically intersected with the bolt mounting hole is formed in the large shaft section; the large shaft section of the idler shaft 3 is arranged in a shaft hole of the idler gear 4, a bushing 6 is arranged between the large shaft section and the inner wall of the shaft hole of the idler gear 4, the bushing 6 is in interference fit with the inner wall of the shaft hole of the idler gear 4, and the small shaft section is arranged in a round hole 121 of the pump body 1; the length of a small shaft section of the idler shaft 3 is smaller than the depth of the round hole 121, a first annular gap 7 is formed between the lower end face of the small shaft section and the boss, and a lubricating oil channel 13 for communicating the first annular gap 7 and the oil chamber 11 is arranged between the first annular gap 7 and the oil chamber 11; the screw of the bolt 5 passes through the bolt mounting hole of the idler shaft 3 and then is screwed into the threaded hole 122 of the pump body 1, so that the idler shaft 3 is fixed on the pump body 1, the diameter of the bolt 5 is smaller than the diameter of the bolt mounting hole of the idler shaft 3, and a second annular gap 8 is formed between the bolt 5 and the inner wall of the bolt mounting hole of the idler shaft 3; the high-pressure oil in the oil chamber 11 sequentially passes through the lubricating oil passage 13, the first annular gap 7, the second annular gap 8 and the lubricating through hole 31 to lubricate the bushing 6 and the idler shaft 3.
In the technical scheme, the pump body 1 is an aluminum casting, and the idler gear 4 and the idler shaft 3 are installed on the pump body 1 through the bolt 5, so that the weight of the pump body 1 is reduced, and the problem of installation between the idler shaft 3 and the pump body 1 is solved. Meanwhile, as the length of the small shaft section of the idler shaft 3 is smaller than the depth of the round hole 121 of the idler shaft mounting hole, and the diameter of the bolt 5 is smaller than the aperture of the bolt mounting hole of the idler shaft 3, the first annular gap 7 and the second annular gap 8 are ingeniously formed, and high-pressure oil in the oil cavity 11 sequentially passes through the lubricating oil channel 13, the first annular gap 7, the second annular gap 8 and the lubricating through hole 31 to lubricate the bushing 6 and the idler shaft 3. Afterwards, high-pressure oil can continuously flow to the two ends of the shaft platform of the idle gear 4 through a gap between the idle gear shaft 3 and the lining 3, so that the engine oil leaks from the end surfaces of the two shaft platforms of the idle gear 4 and returns to an engine oil shell, and the engine oil circulation between the shaft hole of the idle gear 4 and the idle gear shaft 3 is realized, so that the idle gear 4 rotating under a large load can be continuously lubricated and cooled, and the faults of burning, shaft locking and the like of the shaft hole of the idle gear 4 and the idle gear shaft 3 are avoided.
As shown in fig. 4, a further technical solution of this embodiment is: four oil drainage grooves 41 are uniformly distributed on two end faces of the shaft table of the idle gear 4. Because the oil drainage groove 41 is formed in the end face of the shaft boss of the idler gear 4, the flow speed of engine oil between the shaft hole of the bushing 6 and the large shaft section of the idler shaft 3 can be increased, and the lubricating and heat radiating effects are better.
The above embodiments are preferred implementations of the present invention, and besides, the present invention can be implemented in other ways, and any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.
Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.
Claims (6)
1. A light oil pump with an idle gear is characterized in that: the device comprises a pump body (1), a transmission gear (2), an idler shaft (3), an idler gear (4) and a bolt (5), wherein the pump body (1) is an aluminum casting, an oil cavity (11) and an idler shaft mounting hole (12) are formed in the pump body (1), the idler shaft mounting hole (12) is a stepped hole and comprises an upper round hole (121) and a lower threaded hole (122), the diameter of the round hole (121) is larger than that of the threaded hole (122), and a circle of boss is formed at the joint of the round hole (121) and the threaded hole (122); the idler shaft (3) is a stepped shaft and comprises a thrust disc, a large shaft section and a small shaft section, the idler shaft (3) is provided with an axial bolt mounting hole penetrating through the whole idler shaft, and the large shaft section is provided with a lubricating through hole (31) intersected with the bolt mounting hole; a large shaft section of the idler shaft (3) is arranged in a shaft hole of the idler gear (4), a bushing (6) is arranged between the large shaft section and the inner wall of the shaft hole of the idler gear (4), and a small shaft section is arranged in a round hole (121) of the pump body (1); the length of a small shaft section of the idler shaft (3) is smaller than the depth of the round hole (121), a first annular gap (7) is formed between the end face of the lower end of the small shaft section and the boss, and a lubricating oil channel (13) for communicating the first annular gap (7) and the oil cavity (11) is arranged between the first annular gap (7) and the oil cavity; a screw of the bolt (5) penetrates through a bolt mounting hole of the idler shaft (3) and then is screwed into a threaded hole (122) of the pump body (1), so that the idler shaft (3) is fixed on the pump body (1), the diameter of the bolt (5) is smaller than the aperture of the bolt mounting hole of the idler shaft (3), and a second annular gap (8) is formed between the bolt (5) and the inner wall of the bolt mounting hole of the idler shaft (3); and high-pressure oil in the oil cavity (11) sequentially passes through the lubricating oil channel (13), the first annular gap (7), the second annular gap (8) and the lubricating through hole (31) to lubricate the bushing (6) and the idler shaft (3).
2. The light-weight oil pump with an idler gear according to claim 1, characterized in that: and oil drainage grooves (41) are formed in two end faces of the shaft table of the idle gear (4).
3. The light-weight oil pump with an idler gear according to claim 2, characterized in that: four oil drainage grooves (41) are uniformly distributed on two end faces of the shaft table of the idle gear (4).
4. A light-weight oil pump with an idler gear according to any one of claims 1-3, characterized in that: and the bushing (6) is in interference fit with the inner wall of the shaft hole of the idle gear (4).
5. A light oil pump with an idler gear according to any one of claims 1-3, characterized in that: and the lubricating through hole (31) on the idler shaft (3) is vertically intersected with the bolt mounting hole.
6. A light-weight oil pump with an idler gear according to any one of claims 1-3, characterized in that: and a weight-reducing counter bore is arranged on a thrust disc of the idler shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708542.8A CN107289271B (en) | 2017-08-17 | 2017-08-17 | Light oil pump with idle gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708542.8A CN107289271B (en) | 2017-08-17 | 2017-08-17 | Light oil pump with idle gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107289271A CN107289271A (en) | 2017-10-24 |
| CN107289271B true CN107289271B (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710708542.8A Active CN107289271B (en) | 2017-08-17 | 2017-08-17 | Light oil pump with idle gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289271B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827061A (en) * | 2019-04-08 | 2019-05-31 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump with idle gear of structure optimization |
| CN110513593B (en) * | 2019-09-24 | 2024-08-02 | 联禾厚普（太仓）精密机械有限公司 | Self-lubricating oil pump shell |
| CN112065956A (en) * | 2020-08-07 | 2020-12-11 | 中国北方发动机研究所(天津) | Idler combination structure with axial fastening function |
| CN111764982A (en) * | 2020-08-12 | 2020-10-13 | 湖南机油泵股份有限公司 | Externally-mounted oil pump with idle gear |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070062037A (en) * | 2005-12-12 | 2007-06-15 | 현대자동차주식회사 | Discrete type idler gear shaft assembly |
| CN204283862U (en) * | 2014-11-28 | 2015-04-22 | 都江堰龙鼎镁铝科技发展有限公司 | A kind of high strength oil pump casing for motor |
| CN105423106A (en) * | 2015-12-16 | 2016-03-23 | 湖南机油泵股份有限公司 | Engine oil pump provided with idle wheel, and assembly fixture |
| CN106051443A (en) * | 2016-08-17 | 2016-10-26 | 湖南机油泵股份有限公司 | Machine oil pump with idle gear |
| CN206280711U (en) * | 2016-12-20 | 2017-06-27 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump of use aluminium alloy pump body |
| CN107388004A (en) * | 2017-01-03 | 2017-11-24 | 湖南湘衡泵业有限责任公司 | A kind of lubricating oil pump |
| CN207049584U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | A kind of lightweight lubricating oil pump with idle gear |
-
2017
- 2017-08-17 CN CN201710708542.8A patent/CN107289271B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070062037A (en) * | 2005-12-12 | 2007-06-15 | 현대자동차주식회사 | Discrete type idler gear shaft assembly |
| CN204283862U (en) * | 2014-11-28 | 2015-04-22 | 都江堰龙鼎镁铝科技发展有限公司 | A kind of high strength oil pump casing for motor |
| CN105423106A (en) * | 2015-12-16 | 2016-03-23 | 湖南机油泵股份有限公司 | Engine oil pump provided with idle wheel, and assembly fixture |
| CN106051443A (en) * | 2016-08-17 | 2016-10-26 | 湖南机油泵股份有限公司 | Machine oil pump with idle gear |
| CN206280711U (en) * | 2016-12-20 | 2017-06-27 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump of use aluminium alloy pump body |
| CN107388004A (en) * | 2017-01-03 | 2017-11-24 | 湖南湘衡泵业有限责任公司 | A kind of lubricating oil pump |
| CN207049584U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | A kind of lightweight lubricating oil pump with idle gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107289271A (en) | 2017-10-24 |
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Address after: No.69 Beizheng street, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee after: Hunan Meihu Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: No.69 Beizheng street, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee before: Hunan Oil Pump Co.,Ltd. Country or region before: China |
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