CN109113986A - Gear box oil pump and gearbox with emptying structure - Google Patents
Gear box oil pump and gearbox with emptying structure Download PDFInfo
- Publication number
- CN109113986A CN109113986A CN201710482182.4A CN201710482182A CN109113986A CN 109113986 A CN109113986 A CN 109113986A CN 201710482182 A CN201710482182 A CN 201710482182A CN 109113986 A CN109113986 A CN 109113986A
- Authority
- CN
- China
- Prior art keywords
- oil pump
- annular groove
- oil
- gear box
- emptying
- 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.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 47
- 239000011148 porous material Substances 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 17
- 125000006850 spacer group Chemical group 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 147
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000010721 machine oil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The present invention provides a kind of gear box oil pump and gearbox with emptying structure.Gear box oil pump provided by the invention with emptying structure is equipped with annular groove and emptying oil duct on shell, and annular groove is located at the outside of oil Pump rotor, and annular groove is arranged on the face that shell and partition fit；Emptying oil duct is connected to annular groove；Intercommunicating pore is provided on partition, one end of intercommunicating pore is connected to annular groove, and the other end of intercommunicating pore is connected to the suction passage of gear box oil pump.By the way that annular groove is arranged on oil pump case, there are also the emptying oil ducts being connected to annular groove, intercommunicating pore is set at position corresponding with annular groove on partition, it is connected to respectively with the suction passage of annular groove and oil pump, so as to which the oil liquid in oil pump case and spacer gap to be drained into the inlet port of oil pump, to slow down the rate of climb of oil pressure in oil pump case and partition gap, oil liquid is effectively reduced to the axial force of part in oil pump, improves the service life of oil pump.
Description
Technical field
The present invention relates to machinery field more particularly to a kind of gear box oil pumps and gearbox with emptying structure.
Background technique
Oil pump is one of key component of automatic gear-box, is the power source of automatic gear-box hydraulic system, is held to be hydraulic
The components such as units, control valve, fluid torque-converter provide hydraulic oil, are also clutch, synchronizer, gear, bearing etc. provide
Lubrication oil.
Existing gear box oil pump generally is split type structure, i.e., oil Pump rotor is first assembled to oil pump case rotor slot
In, then bulkhead cover is set on oil pump case, finally use bolt fastening.In assembling process, it is generally required to oil pump case lower end
Face and baffle end face machining accuracy with higher and flatness.But it still cannot eliminate between oil pump case and partition
Therefore gap can be full of oil liquid in the gap between the shell and partition of oil pump.Simultaneously because the oil pressure of oil pump out of the mouth by
Hydraulic system determines that oil liquid can have certain pressure in the gap.
In gear box oil pump work, the pressure in gap act on oil pump case and partition can make oil pump parts by
Axial stress, and then cause the deformation of oil pump case and partition, thus cause the gap between oil pump case and partition further
Become larger, increases oil pump leakage.Moreover, the axial stress that the effect of the axial force can be such that the bolt for fastening oil pump is subject to increases,
Reduce the service life of bolt.
Summary of the invention
The present invention provides a kind of gear box oil pump and gearbox with emptying structure, to solve in the prior art due to oil
The problem of there are hydraulic oil between pump case and partition, cause shell and the partition deformation aggravation of oil pump, and oil leak amount increases.
Gear box oil pump provided by the invention with emptying structure, comprising: the shell and partition for the oil pump being fixedly connected,
And the intracorporal oil Pump rotor of chamber that shell and partition surround is set, shell is equipped with annular groove and emptying oil duct, annular groove
Positioned at the outside of oil Pump rotor, and annular groove is arranged on the face that shell and partition fit；Emptying oil duct and annular groove connect
It is logical；
Intercommunicating pore is provided on partition, one end of intercommunicating pore is connected to annular groove, the other end and gear box oil of intercommunicating pore
The suction passage of pump is connected to.
Optionally, oil Pump rotor includes driving gear and driven gear, the external tooth of driving gear and the internal tooth of driven gear
Engagement, and selenodont partition is equipped between driving gear and driven gear, selenodont partition is by driving gear and driven gear
Between working chamber be divided into oil sucting cavity and pumping cavity；Region of the selenodont partition in oil Pump rotor is transition region.
Optionally, emptying oil duct is located at the outside that gear box oil pump oil sucting cavity is corresponded on shell.
Optionally, emptying oil duct is located at the outside that gear box oil pump transition region is corresponded on shell.
Optionally, it is connected between intercommunicating pore and suction passage by oil groove.
Optionally, the quantity of emptying oil duct is multiple, and multiple emptying oil ducts are distributed in the outside of oil sucting cavity, and and ring
The outer rim of shape slot is connected to；
Optionally, the width of each emptying oil duct is all larger than the groove width of annular groove.
Optionally, the cross-sectional area of each draining oil duct is greater than the cross-sectional area of annular groove.
Optionally, the outer rim of annular groove and inner edge are circle, and the center of circle of annular groove is overlapped with the axle center of driven rotor, and
And the diameter of annular groove inner edge is greater than driven rotor.
Optionally, the center of circle of annular groove is overlapped with the axle center of driven gear, and annular groove inner edge diameter is greater than driven gear
Outer diameter.
The present invention also provides a kind of gearboxes, including as described above with the gear box oil pump of emptying structure.
Gear box oil pump provided by the invention with emptying structure, comprising: the shell and partition for the oil pump being fixedly connected,
And the intracorporal oil Pump rotor of chamber that shell and partition surround is set, shell is equipped with annular groove and emptying oil duct, annular groove
Positioned at the outside of oil Pump rotor, and annular groove is arranged on the face that shell and partition fit；Emptying oil duct and annular groove connect
It is logical；Intercommunicating pore is provided on partition, one end of intercommunicating pore is connected to annular groove, the suction of the other end and gear box oil pump of intercommunicating pore
Oily channel connection.For the present invention by the way that annular groove is arranged on the face that fits on shell with partition, annular groove is located at oil Pump rotor
Outside, be additionally provided with the emptying oil duct being connected to annular groove, at the same on partition at position corresponding with annular groove be arranged
There is intercommunicating pore, be connected to respectively with annular groove and suction passage, so as to drain into oil pump case and the oil liquid in spacer gap
The inlet port of oil pump is effectively reduced oil pump gap inner fluid to the axial force of components in oil pump, improves the use of oil pump
Service life.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic elevation view of the shell for the gear box oil pump with emptying structure that the embodiment of the present invention one provides；
Fig. 2 is the Section A-A schematic diagram in Fig. 1；
Fig. 3 is the structural schematic diagram for the gear box oil pump with emptying structure that the embodiment of the present invention one provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 is the schematic elevation view of the shell for the gear box oil pump with emptying structure that the embodiment of the present invention one provides.
Fig. 2 is the Section A-A schematic diagram in Fig. 1.Fig. 3 is the gear box oil pump with emptying structure that the embodiment of the present invention one provides
Structural schematic diagram.As shown in Figure 1 to Figure 3, the gear box oil pump provided in this embodiment with emptying structure, comprising: fixed to connect
The shell 1 and partition 2 of the oil pump connect, and the intracorporal oil Pump rotor of chamber that shell 1 and partition 2 surround is set and (is not shown in figure
Out), shell 1 is equipped with annular groove 3 and emptying oil duct 4, and annular groove 3 is located at the outside of oil Pump rotor, and the setting of annular groove 3 exists
On the face that shell 1 and partition 2 fit；Emptying oil duct 4 is connected to annular groove 3.
Specifically, oil Pump rotor includes driving gear and driven gear, the external tooth of driving gear and the internal tooth of driven gear
Engagement, and selenodont partition is equipped between driving gear and driven gear, selenodont partition is by driving gear and driven gear
Between working chamber be divided into oil sucting cavity and pumping cavity.Oil sucting cavity is connected to oil inlet passage, when driving gear is disengaged, oil suction
The volume of chamber is gradually increased, and generates vacuum, and machine oil is inhaled into；Rotor continues to rotate, and machine oil is brought to the side of oil road, this
When, driving gear just enters with driven gear to be engaged, and pumping cavity volume is reduced, and oil pressure increases, and machine oil is squeezed out from pumping cavity
And it goes out through oil discharge passage force feed.That is, being low-pressure area in oil sucting cavity, and in pumping cavity it is higher-pressure region.Selenodont partition exists simultaneously
Region in oil Pump rotor is transition region, and for separating oil sucting cavity and pumping cavity, the pressure of transition region is between oil sucting cavity and pressure
Between oil pocket.
The annular groove 3 being arranged on shell 1 is located on the binding face of shell 1 and partition 2, while also setting up and unloading on shell 1
Oil duct 4, emptying oil duct 4 are connected to annular groove 3, so that the liquid oil in 2 gap of shell 1 and partition is first flowed into emptying channel 4
It is interior, then flow in annular groove 3 by emptying oil duct 4.Therefore, in order to make liquid oil smoothly flow to emptying oil duct 4, it is preferred that can will
Emptying oil duct 4 is arranged in the low-pressure area of gear box oil pump, so that liquid oil smoothly enters in low-pressure area from higher-pressure region.Certainly,
Emptying oil duct 4 can be arranged in the transition region of gear box oil pump, liquid oil is made to enter transition region by higher-pressure region.
Further, the inner edge of the annular groove 3 should be located at the outside of oil Pump rotor, meanwhile, for the ease of laying emptying
Emptying oil duct 4 can be arranged the outer rim of annular groove 3, be connected to emptying oil duct 4 and the outer rim of annular groove 3 by oil duct 4.
Further, intercommunicating pore 5 is provided on partition 2, intercommunicating pore 5 is located at corresponding with the annular groove 3 on partition 2
On position, intercommunicating pore 5 is connected to annular groove 3, meanwhile, intercommunicating pore 5 can also pass through oil groove and gear box oil pump
Suction passage connection.So that can be returned into the liquid oil in annular groove 3 by intercommunicating pore 5 to gear box oil pump
Inlet port is gathered in the gap between the shell 1 and partition 2 of gear box oil pump with effectively reducing liquid oil.
Preferably, in order to improve the speed and oil mass that liquid oil enters annular groove, the accumulation of liquid oil is reduced as early as possible, it can be by emptying
The quantity of oil duct 4 is set as multiple, and multiple emptying oil ducts 4 are distributed in the outside of oil sucting cavity or transition region, and with
The outer rim of annular groove 3 is connected to.Specifically, emptying oil duct 4 can equidistantly be spaced laying.It further, can be by multiple emptying oil
The width in road 4 is set greater than the width of annular groove 3.Specifically, the width of annular groove 3 may be configured as 2mm, groove depth position 0.8mm,
Emptying oil duct 4 may be configured as width and unload oil hole greater than 2mm, then be connected to annular groove 3.
Further, the outer rim of annular groove 3 and inner edge can be disposed as circle, that is, annular groove 3 is the annulus of trough of belt,
The center of circle of annular groove 3 is overlapped with the axle center of driven gear simultaneously, and the diameter of 3 inner edge of annular groove is greater than driven gear.This
Sample annular groove 3 is equal with distance in driven gear all directions, and the oil liquid leaked between partition 2 and shell 1 can be made uniform
It flow in annular groove 3, avoids annular groove 3 from locally bearing the excessive situation of oil liquid pressure and occur, in addition, annular groove 3 and driven tooth
Wheel with one heart, is also beneficial to the gravity centre distribution of balance oil pump.
Gear box oil pump provided by the invention with emptying structure, passes through the face to fit on oil pump case with partition
Upper setting annular groove, there are also the emptying oil ducts being connected to annular groove, while setting at position corresponding with annular groove on partition
It is equipped with intercommunicating pore, is connected to respectively with the suction passage of annular groove and oil pump, so as to will be in oil pump case and spacer gap
Oil liquid drains into the inlet port of oil pump, to slow down the rate of climb of oil pressure in oil pump case and partition gap, is effectively reduced between oil pump
Gap inner fluid also reduces assembly axial stress in bolt to the axial force of components in oil pump, improves the use of oil pump
Service life.
In addition, the present invention also provides a kind of gearbox, including the change with emptying structure as described in previous embodiment one
Fast case oil pump, wherein have the function of the specific structure of the gear box oil pump of emptying structure and in previous embodiment one
It is described in detail, details are not described herein again.
Gearbox provided by the invention, including the gear box oil pump with emptying structure, by oil pump case with every
Annular groove is set on the face that plate fits, the emptying oil duct being also connected to annular groove, and meanwhile it is opposite with annular groove on partition
Be provided with intercommunicating pore at the position answered, be connected to respectively with the suction passage of annular groove and oil pump, so as to by oil pump case with
Oil liquid in spacer gap drains into the inlet port of oil pump, to slow down the rate of climb of oil pressure in oil pump case and partition gap, has
Effect reduces oil pump gap inner fluid to the axial force of components in oil pump, also reduces assembly axial stress in bolt, improves
The service life of oil pump.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of gear box oil pump with emptying structure, comprising: the shell and partition for the oil pump being fixedly connected, and setting exist
The intracorporal oil Pump rotor of chamber that the shell and the partition surround, which is characterized in that the shell is equipped with annular groove and unloads
Oil duct, the annular groove are located at the outside of the oil Pump rotor, and annular groove setting the shell and it is described every
On the face that plate fits；The emptying oil duct is connected to the annular groove；
Intercommunicating pore is provided on the partition, one end of the intercommunicating pore is connected to the annular groove, the intercommunicating pore it is another
End is connected to the suction passage of the gear box oil pump.
2. gear box oil pump according to claim 1, which is characterized in that the oil Pump rotor includes driving gear and driven
Gear, the interior tooth engagement of the external tooth of the driving gear and the driven gear, and the driving gear and the driven tooth
Selenodont partition is equipped between wheel, the selenodont partition divides the working chamber between the driving gear and the driven gear
For oil sucting cavity and pumping cavity；Region of the selenodont partition in the oil Pump rotor is transition region.
3. gear box oil pump according to claim 2, which is characterized in that the emptying oil duct is located on the shell corresponding
The outside of the gear box oil pump oil sucting cavity.
4. gear box oil pump according to claim 2, which is characterized in that the emptying oil duct is located on the shell corresponding
The outside of the gear box oil pump transition region.
5. gear box oil pump according to claim 1 to 4, which is characterized in that the intercommunicating pore and the suction passage
Between pass through oil groove be connected to.
6. gear box oil pump according to claim 1 to 4, which is characterized in that the quantity of the emptying oil duct is more
A, the multiple emptying oil duct is distributed in the outside of the oil sucting cavity, and is connected to the outer rim of the annular groove.
7. gear box oil pump according to claim 1 to 4, which is characterized in that the width of each emptying oil duct is equal
Greater than the groove width of the annular groove.
8. gear box oil pump according to claim 1 to 4, which is characterized in that the cross section of each draining oil duct
Area is greater than the cross-sectional area of the annular groove.
9. gear box oil pump according to claim 1 to 4, which is characterized in that the outer rim of the annular groove and inner edge are equal
For circle, the center of circle of the annular groove is overlapped with the axle center of the driven rotor, and the diameter of the annular groove inner edge is greater than
The driven rotor.
10. a kind of gearbox, which is characterized in that including the described in any item speed changes with emptying structure of such as claim 1-9
Case oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482182.4A CN109113986A (en) | 2017-06-22 | 2017-06-22 | Gear box oil pump and gearbox with emptying structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482182.4A CN109113986A (en) | 2017-06-22 | 2017-06-22 | Gear box oil pump and gearbox with emptying structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109113986A true CN109113986A (en) | 2019-01-01 |
Family
ID=64732811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710482182.4A Pending CN109113986A (en) | 2017-06-22 | 2017-06-22 | Gear box oil pump and gearbox with emptying structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109113986A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3313238A (en) * | 1964-07-04 | 1967-04-11 | Bosch Gmbh Robert | Hydraulic apparatus |
| DE3321380A1 (en) * | 1983-06-14 | 1984-12-20 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Gear machine for self-lubricating pumping media |
| JPH0579472A (en) * | 1991-09-17 | 1993-03-30 | Toyota Motor Corp | Variable capacity pump |
| KR20040051456A (en) * | 2002-12-12 | 2004-06-18 | 임락복 | Low noise external gear pump with floating gear housing |
| EP1503081A1 (en) * | 2003-07-31 | 2005-02-02 | Voith Turbo GmbH & Co. KG | Hydraulic pump |
| CN201016338Y (en) * | 2007-02-26 | 2008-02-06 | 南京金润机油泵制造有限公司 | Oil pump |
| JP2012233405A (en) * | 2011-04-28 | 2012-11-29 | Daihatsu Motor Co Ltd | Internal gear type oil pump |
| CN103363278A (en) * | 2012-03-29 | 2013-10-23 | 比亚迪股份有限公司 | Oil pump, engine front cover and engine |
| CN103511602A (en) * | 2013-10-30 | 2014-01-15 | 盛瑞传动股份有限公司 | Gearbox oil pump with oil discharge groove |
| CN203441740U (en) * | 2013-08-15 | 2014-02-19 | 北汽福田汽车股份有限公司 | Gearbox oil pump structure |
| CN205714737U (en) * | 2016-04-26 | 2016-11-23 | 内蒙古欧意德发动机有限公司 | Oil pump for automatic transmission |
| CN207539022U (en) * | 2017-06-22 | 2018-06-26 | 江阴华欧德汽车动力系统研发有限公司 | Gear box oil pump and gearbox with emptying structure |
-
2017
- 2017-06-22 CN CN201710482182.4A patent/CN109113986A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3313238A (en) * | 1964-07-04 | 1967-04-11 | Bosch Gmbh Robert | Hydraulic apparatus |
| DE3321380A1 (en) * | 1983-06-14 | 1984-12-20 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Gear machine for self-lubricating pumping media |
| JPH0579472A (en) * | 1991-09-17 | 1993-03-30 | Toyota Motor Corp | Variable capacity pump |
| KR20040051456A (en) * | 2002-12-12 | 2004-06-18 | 임락복 | Low noise external gear pump with floating gear housing |
| EP1503081A1 (en) * | 2003-07-31 | 2005-02-02 | Voith Turbo GmbH & Co. KG | Hydraulic pump |
| CN1580575A (en) * | 2003-07-31 | 2005-02-16 | 沃伊特涡轮两合公司 | Oil pump |
| CN201016338Y (en) * | 2007-02-26 | 2008-02-06 | 南京金润机油泵制造有限公司 | Oil pump |
| JP2012233405A (en) * | 2011-04-28 | 2012-11-29 | Daihatsu Motor Co Ltd | Internal gear type oil pump |
| CN103363278A (en) * | 2012-03-29 | 2013-10-23 | 比亚迪股份有限公司 | Oil pump, engine front cover and engine |
| CN203441740U (en) * | 2013-08-15 | 2014-02-19 | 北汽福田汽车股份有限公司 | Gearbox oil pump structure |
| CN103511602A (en) * | 2013-10-30 | 2014-01-15 | 盛瑞传动股份有限公司 | Gearbox oil pump with oil discharge groove |
| CN205714737U (en) * | 2016-04-26 | 2016-11-23 | 内蒙古欧意德发动机有限公司 | Oil pump for automatic transmission |
| CN207539022U (en) * | 2017-06-22 | 2018-06-26 | 江阴华欧德汽车动力系统研发有限公司 | Gear box oil pump and gearbox with emptying structure |
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