CN101512158A - Gear pump - Google Patents
Gear pump Download PDFInfo
- Publication number
- CN101512158A CN101512158A CNA2006800557822A CN200680055782A CN101512158A CN 101512158 A CN101512158 A CN 101512158A CN A2006800557822 A CNA2006800557822 A CN A2006800557822A CN 200680055782 A CN200680055782 A CN 200680055782A CN 101512158 A CN101512158 A CN 101512158A
- Authority
- CN
- China
- Prior art keywords
- gear
- main body
- hole
- glasses shape
- shape hole
- 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.)
- Granted
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Classifications
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- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
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- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
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- 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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
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- 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
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- 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
- F04C2/18—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 with similar tooth forms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A gear pump (1) that requires a reduced number of materials and a smaller installation space and that is produced at reduced material costs. The gear pump (1) has one or more gear pairs (6, 7) in which drive gears (61, 71) and driven gears (62, 72) are meshed with each other, and also has a casing (2) for receiving the gear pairs (6, 7). The casing (2) is constructed from a body (4), a front cover (3), and a rear cover (5). The body (4) has eyeglass-shaped holes (4a, 4b) for receiving the gear pairs, bearing holes (4x, 4y) communicating with the eyeglass-shaped holes (4a, 4b) and in which shafts (611, 621, 711, 721) for supporting gears (61, 62, 71, 72) forming the gear pairs are inserted, a low-pressure side port (43) communicating with the eyeglass hole (4a) and sucking a low-pressure operation liquid, high-pressure side ports (41, 42) communicating with the eyeglass-shaped hole (4a) and discharging a high-pressure operation liquid, a valve installation section (44) provided near the high-pressure side ports (41, 42) and on which a valve can be installed, and a return path (45) running from the valve installation section (44) up to the low-pressure side port (43) and positioned in the front-rear direction corresponding to the bearing holes (4x, 4y). The front cover (3) and rear cover (5) are arranged at the front and rear sides of the body (4) to close the eyeglass-shaped hole (4a).
Description
Technical field
The invention particularly relates to the gear pump that can use with hydraulic equipment etc. at construction equipment, vehicle.
Background technique
In the past, as shown in Figures 7 and 8, gear pump X1 possessed: the gear mesh X6 that actuation gear X61 and driven gear X62 engagement form; Casing X2, it has cover X3, the X5 that possesses the glasses shape hole X4a that accommodates this gear mesh X6 and cover the place ahead and even the rear of this main body X4, and utilizing fixed-use bolt X8 that they are formed by connecting, this gear pump X1 is as in the extensive use with the hydraulic pressure supply source of hydraulic equipment etc. of construction equipment, vehicle.This gear pump X1 has working solution is supplied with from the low voltage side stream mouth X43 that is communicated with the described glasses shape hole X4a space between actuation gear X61 and driven gear X62, and from the function of high pressure side stream mouth X41 ejection.
In recent years, have the requirement that valves such as relief valve and flow circuit control valve are installed in the high pressure side of this gear pump X1.At this moment, existence need be from being installed in the situation of on high-tension side valve to the pipe arrangement of low voltage side, and this pipe arrangement is arranged on the outside of this gear pump X1 mostly.
Patent documentation 1: TOHKEMY 2003-336583 communique.
But, when valve is installed in the high pressure side,, then need joint and pipe arrangement conduit etc. if at the above-mentioned pipe arrangement of the outer installment of gear-box X1, and then, need guarantee to be used near this gear pump X1, being provided with the space of joint and pipe arrangement conduit etc.Therefore, for solving this problem, consider in gear pump X1, to be provided with access from valve to the low pressure side opening.
But, when when the glasses shape hole X4a of main body X4 and promptly corresponding with the glasses shape hole X4a fore-and-aft direction position of the part between the described bolt X8 are provided with this access, near the glasses shape hole X4a of main body 4 position wall thickness is very thin, and generation can not fully obtain other unfavorable conditions of the intensity of the hydraulic pressure that born at glasses shape hole X4a.
Summary of the invention
The present invention makes for solving above-mentioned problem.
Promptly, gear pump of the present invention possesses one or more gear mesh that formed by actuation gear and driven gear engagement and the casing of accommodating this gear mesh, described casing possesses: main body, and it has: the glasses shape hole that contains described gear mesh, be communicated with this glasses shape hole and make the gear that constitutes described gear mesh is carried out the bearing hole that the axle of pivot suspension passes, the low voltage side mouth that is communicated with the working solution that sucks low pressure with described glasses shape hole, be communicated with described glasses shape hole and discharge high pressure working solution the high pressure side mouth and be arranged near this high pressure side mouth and the valve assembly department of valve can be installed; Cover, it is arranged at the place ahead of this main body or at least one side in the rear, and inaccessible described glasses shape hole, described gear pump are characterised in that described main body also has the return path of the described valve assembly department of connection to the low voltage side mouth in the fore-and-aft direction position corresponding with described bearing hole.
In view of the above, because the position that is provided with described bearing hole of main body is thicker than the position wall thickness that is provided with described glasses shape hole, so even return path is set, main body intensity does not have by more impaired yet.That is, under situation not than macrolesion main body intensity, design return path, the reducing of components number in the time of can realizing disposing this gear pump or motor and installing space.And then, and the position around the glasses shape hole of main body is set at heavy wall, and the situation that return path is set at this position is relatively, owing to do not need main body itself is constituted with heavy wall compared with the existing, therefore can reduce the material cost when making main body.In addition, so-called " the fore-and-aft direction position corresponding with described bearing hole " is to comprise having whole notion that there is not the fore-and-aft direction position in described glasses shape hole in described bearing hole.
The invention effect
The present invention implements by the mode of above explanation, obtains the effect of the following stated.
Promptly, according to the present invention as can be known, by utilizing the main body wall thickness thick in the fore-and-aft direction position corresponding with bearing hole, and return path is set in this position, thereby can under the situation than macrolesion return path be set in the intensity that makes main body, the reducing of components number when realizing this gear pump of configuration or motor and installing space.And then, with the scheme that position around the glasses shape hole of main body is set at heavy wall and return path is set at this position relatively, do not need main body itself is constituted with heavy wall compared with the existing, therefore can reduce the material cost when making main body.
Description of drawings
Fig. 1 is the side sectional view of the gear pump of expression first embodiment of the invention.
Fig. 2 is the left side view of the gear pump of this mode of execution of expression.
Fig. 3 is the right side view of the gear pump of this mode of execution of expression.
Fig. 4 is the X-X sectional view of Fig. 1.
Fig. 5 is the side sectional view of the gear pump of expression second embodiment of the invention.
Fig. 6 is the Y-Y sectional view of Fig. 5.
Fig. 7 is the side sectional view of the existing gear pump of expression.
Fig. 8 is the Z-Z sectional view of Fig. 7.
Among the figure: 1, A1-gear pump; 2, A2-casing; 3, the anterior cover of A3-; 4, A4-main body; First, second glasses shape hole of 4a, 4b-; A4a-glasses shape hole; 4x, 4y, A4x, A4y-bearing hole; 41, first, second high pressure side stream mouth of 42-; A41-high pressure side stream mouth; 43, A43-low voltage side stream mouth; 44, A44-valve assembly department; 45, A45-return path; 5-rear portion cover; 6, first, second gear mesh of 7-; The A6-gear mesh.
Embodiment
At first, with reference to Fig. 1 and Fig. 2 first mode of execution of the present invention is carried out following explanation.
More specifically, be provided with first and second glasses shape hole 4a, 4b in the rear and front end of described main body 4 one, and, be formed with the intermediate bulkheads 4W that distinguishes two gear mesh 6,7 at the intermediate portion of this main body 4.By described first glasses shape hole 4a and anterior cover 3 indoor first gear mesh 6 that contain that form, covering 5 indoor second gear mesh 7 that contain that form by described second glasses shape hole 4b and rear portion.In addition, be provided with bearing hole 4x at described intermediate bulkheads 4W, this bearing hole 4x is communicated with described first and second glasses shape hole 4a, 4b respectively, and makes the input and output shaft 611 of pivot suspension first actuation gear 61 and the axle 711 bearing hole 4x that pass of pivot suspension second actuation gear 71.In addition, also be provided with bearing hole 4y at described intermediate bulkheads 4W, this bearing hole 4y is communicated with described first and second glasses shape hole 4a, 4b respectively, and makes the axle 621 of pivot suspension first driven gear 62 and the axle 721 bearing hole 4y that pass respectively of pivot suspension second driven gear 72.
In addition, anterior cover 3 and rear portion cover 5 have the identical structure of using with conduct of known structure in this duplex gear pump.That is, forwardly cover 3 and be provided with the axle 621 bearing hole 3y that pass that make the bearing hole 3x that described input and output shaft 611 passes and make pivot suspension first driven gear 62.On the other hand, be provided with 711 axle 711 bearing hole 5x that pass that pass who makes pivot suspension second actuation gear 71 and the axle 721 bearing hole 5y that pass that make pivot suspension second driven gear 72 at rear portion cover 5.And anterior cover 3, main body 4 and rear portion cover 5 are fixed as one by fixed-use bolt 8.In addition, between described anterior cover 3 and described input and output shaft 611, be provided with oil sealing 91.
In addition, Fig. 2 and shown in Figure 3 is provided with first and second high pressure side stream mouth 41,42 in main body 4 one sides as described, is provided with low voltage side stream mouth 43 at opposite side.First and second gear mesh 6,7 is as pump work the time, and low voltage side stream mouth 43 becomes inflow entrance, and first and second high pressure side stream mouth 41,42 becomes ejiction opening.First and second high pressure side stream mouth 41,42 is communicated with the first glasses shape hole 4a that accommodates first gear mesh 6 and the second glasses shape hole 4b that accommodates second gear mesh 7 respectively.On the other hand, low voltage side stream mouth 43 comprises: be communicated with the joint 431 of direction extension forwards, backwards with described first and second glasses shape hole 4a, 4b; The opening portion 432 that wears to described another side from the centre of this joint 431.
And then, in the present embodiment, also be provided with the valve assembly department 44 of the valve (diagram is slightly) that the relief valve representative can be installed in the side of the described high pressure side stream mouth 41,42 that is provided with main body 4.And,, be provided with return path 45 and make its front and back position consistent with described bearing hole 4x, 4y in order to be communicated with this valve assembly department 44 and described low voltage side stream mouth 43.That is, be provided with return path 45 at described intermediate bulkheads 4W.More specifically,, be equipped with the hole that under the roughly certain situation of the distance in the axle center of the bearing hole 4x that keeps at a distance, arrives the shape of described valve assembly department 44 from described opening portion 432, with this hole as return path 45.
During this gear pump 1 work, identical with existing duplex gear pump, working solution is supplied in the teeth groove of first actuation gear 61 and first driven gear 62 and the teeth groove of second actuation gear 71 and second driven gear 72 respectively from low voltage side stream mouth 43, the working solution that is supplied in the teeth groove of first actuation gear 61 and first driven gear 62 sprays from the first high pressure side stream mouth 41, in addition, be supplied in the working solution of teeth groove of second actuation gear 71 and second driven gear 72 from the ejection of the second high pressure side stream mouth 42.At this moment, input and output shaft 611 and the axle 711 that is supported on bearing hole 4x bears because of the bottom-right active force of hydraulic pressure to Fig. 4.
And when the valve that is installed on valve assembly department 44 (diagram slightly) work, working solution returns the described opening portion 432 of described low voltage side stream mouth 43 via described return path 45.
According to the structure of the gear pump 1 of present embodiment as can be known, be provided with among the thick intermediate bulkheads 4W of the position wall thickness of described glasses shape hole 4a at the ratio of described main body 4, the return path 45 of connection from described valve assembly department 44 to low voltage side mouth 43 is set, make its fore-and-aft direction position consistent with described bearing hole, therefore, even return path 45 is set, the intensity of main body 4 does not have than macrolesion yet.In addition, in the present embodiment, because described return path is arranged on the top of the bearing hole 4x of Fig. 4, promptly is arranged on and is supported on the input and output shaft 611 of this bearing hole 4x and the roughly opposition side of the active force that axle 711 bears because of hydraulic pressure with respect to bearing hole 4x, so from this point, the loss of strength that return path 45 caused main bodys 4 are set is less.That is, under can not situation, return path 45 be set, the reducing of components number in the time of can realizing disposing this gear pump 1 and valve and installing space than the intensity of macrolesion main body 4.And then, and the position around the glasses shape hole 4a of main body 4 is set at heavy wall, and the scheme that the relief valve path is set at this position is relatively, does not need main body 4 is constituted with heavy wall compared with the existing itself, therefore can reduce the material cost when making main body 4.
Then, with reference to Fig. 5 and Fig. 6 second mode of execution of the present invention is described.
Shown in the Y-Y sectional view of the longitudinal section of the gear pump A1 of illustrated this mode of execution of Fig. 5, the illustrated Fig. 5 of Fig. 6, the casing A2 that the gear pump A1 of this mode of execution possesses a gear mesh A6 and accommodates this gear mesh A6, is made of front portion cover A3 and main body A 4.Described gear mesh A6 is formed by the first actuation gear A61 and second driven gear A62 engagement.
More specifically, be provided with glasses shape hole A4a, accommodating gear mesh A6 in the space that forms by this glasses shape hole A4a and anterior cover A3 at the front end of described main body A 4.In addition, be provided with bearing hole A4x, A4y in main body A 4, this bearing hole A4x, A4y are communicated with described glasses shape hole A4a, and the input and output shaft A611 of pivot suspension actuation gear A61 and the axle A621 of pivot suspension driven gear A62 are passed respectively.
In addition, anterior cover A3 has the identical structure of using with conduct of known structure in this gear pump.That is, forwardly cover 3 and be provided with the bearing hole A3y that the axle A621 that makes the bearing hole A3x that described input and output shaft A611 passes and make pivot suspension driven gear A62 passes.And anterior cover A3 and main body A 4 are fixed as one by fixed-use bolt A8.In addition, between described anterior cover A3 and described input and output shaft A611, be provided with oil sealing A91.In addition, in Fig. 6, described glasses shape hole A4a is represented by imaginary line.
Actuation gear A61 and input and output shaft A611 are integrally formed.This input and output shaft A611 is supported on casing A2 by lining A92 in the bearing hole A3x that is configured in described anterior cover A3 and the lining A92 that is configured in the bearing hole A4x of described main body.On the other hand, actuation gear A62 is also integrally formed with axle A621.This A621 is supported on casing A2 by lining A92 in the bearing hole A3y that is configured in anterior cover A3 and the lining A92 that is configured in the bearing hole A4y of described main body A 4.
In addition, be provided with high pressure side stream mouth A41 in main body A 4 one sides, be provided with low voltage side stream mouth A43 at opposite side.Gear mesh A6 is as pump work the time, and low voltage side stream mouth A43 becomes inflow entrance, and high pressure side stream mouth A41 becomes ejiction opening.High pressure side stream mouth A41 is communicated with the glasses shape hole A4a that accommodates described gear mechanism A6.On the other hand, low voltage side stream mouth A43 comprises: the joint A431 that is communicated with described glasses shape hole A4a and rearward extends; The opening portion A432 that wears to described another side from the rearward end of this joint A431.In addition, in Fig. 6, described high pressure side stream mouth A41 is represented by imaginary line.
And then, in the present embodiment, also be provided with the valve assembly department A44 of the valve (diagram is slightly) that the relief valve representative can be installed in the stream mouth A41 side, described high pressure side that is provided with main body A 4.And,, be provided with return path 45 and make its front and back position consistent with described bearing hole A4x in order to be communicated with this valve assembly department A44 and described low voltage side stream mouth A43.More specifically,, be equipped with the hole that under the roughly certain situation of the distance in the axle center of the clutch shaft bearing hole A4x that keeps at a distance, arrives the shape of described valve assembly department A44 from described opening portion A432, with this hole as return path A45.
In this gear pump A1 when work,, identical with existing gear pump, working solution is supplied in the teeth groove of actuation gear A61 and driven gear A62 from low voltage side stream mouth A43, and the working solution that is supplied in this space sprays from high pressure side stream mouth A41.At this moment, the input and output shaft A611 that is supported on bearing hole A4x bears because of the bottom-right active force of hydraulic pressure to Fig. 6.
And when the valve that is installed on valve assembly department A44 (diagram slightly) work, working solution returns the described opening portion A432 of described low voltage side stream mouth A43 via described return path A45.
In the structure of the gear pump A1 of present embodiment, as mentioned above, the return path A45 of connection from described valve assembly department A44 to low voltage side mouth A43 is set, makes its fore-and-aft direction position consistent with the described bearing hole A4x of described main body A 4, this position is thicker than the position wall thickness that is provided with glasses shape hole 4a.Thereby, because of the existence of return path can not bring than macrolesion the intensity of main body A 4.In addition, in the present embodiment, because the roughly opposition side of the active force that the input and output shaft A611 that described path A45 is arranged on the top of the bearing hole A4x of Fig. 6, promptly be arranged on and be supported on this bearing hole A4x with respect to bearing hole A4x bears because of hydraulic pressure, so from this point, the loss of strength that the caused main body A 4 of return path A45 is set is less.That is, under can not situation, return path A45 be set, the reducing of components number in the time of can realizing disposing this gear pump A1 and valve and installing space than the intensity of macrolesion main body A 4.And then, and the position around the glasses shape hole A4a of main body A 4 is set at heavy wall, and the scheme that return path is set at this position is relatively, does not need main body A 4 is constituted with heavy wall compared with the existing itself, therefore can reduce the material cost when making main body A 4.
In addition, the present invention is not limited to above-described first, second mode of execution.
For example, the present invention also can be suitable for the gear pump with gear mesh more than three pairs.
In addition, gear pump with two pairs of gear mesh can certainly be constituted as the phase difference gear pump, this phase difference gear pump and unlike the gear pump of first mode of execution of as above stating, but respectively have a high pressure side stream mouth and low voltage side stream mouth, the engagement of two pairs of gear mesh is staggered constantly.
And then, shown in above-mentioned second mode of execution, constitute casing by main body and rear portion cover and replace constituting casing by front portion cover and main body, thereby, also can be, promptly overflow passage is set than position on the front, glasses shape hole at the position that is provided with bearing hole of the main body of this casing.
And the valve that is installed on the valve assembly department is not limited to relief valve, can certainly be the valve of other kinds such as flow control valve.
In addition, also can carry out various changes without departing from the spirit and scope of the present invention.
Industrial applicibility
If apply in a flexible way the present invention, then by utilizing corresponding with dead eye in main body of main body wall thickness The fore-and-aft direction position is thicker than the fore-and-aft direction position corresponding with glasses shape hole, and returns in this position setting Path, thus can under the situation than macrolesion return path be set in the intensity that makes main body, real Reducing of components number when now disposing this gear pump and installing space. And then, with the eye with main body The scheme that the position is set at heavy wall and return path is set at this position around the specular hole does not relatively need Main body itself is consisted of with heavy wall compared with the existing, therefore can reduce the material when making main body Take.
Claims (1)
1. gear pump, it possesses one or more gear mesh that formed by actuation gear and driven gear engagement and the casing of accommodating this gear mesh,
Described casing possesses:
Main body, it has: accommodate the glasses shape hole of described gear mesh, be communicated with and make with this glasses shape hole to the gear that constitutes described gear mesh carry out bearing hole that the axle of pivot suspension passes, the high pressure side mouth of the working solution that is communicated with and sucks the low voltage side mouth of the working solution of low pressure with described glasses shape hole, be communicated with and discharge high pressure and be arranged near the valve assembly department that valve also can be installed this high pressure side mouth with described glasses shape hole;
Cover, it is arranged at the place ahead of this main body or at least one side in the rear, and inaccessible described glasses shape hole,
Described gear pump is characterised in that,
Described main body also has the return path of the described valve assembly department of connection to the low voltage side mouth in the fore-and-aft direction position corresponding with described bearing hole.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2006/317872 WO2008029477A1 (en) | 2006-09-08 | 2006-09-08 | Gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101512158A true CN101512158A (en) | 2009-08-19 |
| CN101512158B CN101512158B (en) | 2013-11-06 |
Family
ID=39156922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800557822A Active CN101512158B (en) | 2006-09-08 | 2006-09-08 | Gear pump |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4952719B2 (en) |
| KR (1) | KR101146501B1 (en) |
| CN (1) | CN101512158B (en) |
| TW (1) | TWI378181B (en) |
| WO (1) | WO2008029477A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012924A (en) * | 2020-08-22 | 2020-12-01 | 苏州讯如电子科技有限公司 | Gear type pressure regulating oil pump with harmonic molded lines |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008054753A1 (en) * | 2008-12-16 | 2010-06-17 | Robert Bosch Gmbh | Internal gear pump |
| US8224481B2 (en) * | 2009-01-19 | 2012-07-17 | Access Business Group International Llc | Method and apparatus for dispensing fluid compositions |
| JP5361074B2 (en) * | 2009-11-20 | 2013-12-04 | ジヤトコ株式会社 | Helical gear pump |
| RU2448272C2 (en) * | 2010-05-20 | 2012-04-20 | Мирослав Георгиевич Георгиевский | Gear hydraulic unit |
| TWI699480B (en) * | 2015-04-01 | 2020-07-21 | 義大利商薩蒂瑪機械股份有限公司 | Geared positive-displacement machine |
| KR102659308B1 (en) | 2022-11-09 | 2024-04-22 | (주)동일산업 | High pressure gear pump for low viscosity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2554470A1 (en) * | 1975-12-04 | 1977-06-08 | Daimler Benz Ag | Gear type lubricating oil pump for IC engine - has pump wheel fixed to engine crank-shaft |
| DE4441505A1 (en) * | 1994-11-22 | 1996-05-23 | Bosch Gmbh Robert | Fuel feed pump for a fuel injection pump for internal combustion engines |
| FR2735534B1 (en) * | 1995-06-15 | 1997-08-29 | Hydroperfect Int | HIGH COMPACTION ELECTRIC MOTOR AND HYDRAULIC PUMP ASSEMBLY |
| JPH10205317A (en) * | 1997-01-20 | 1998-08-04 | Unisia Jecs Corp | Oil pump for internal combustion engine |
-
2006
- 2006-09-08 CN CN2006800557822A patent/CN101512158B/en active Active
- 2006-09-08 KR KR1020097004368A patent/KR101146501B1/en not_active IP Right Cessation
- 2006-09-08 WO PCT/JP2006/317872 patent/WO2008029477A1/en active Application Filing
- 2006-09-08 JP JP2008533020A patent/JP4952719B2/en active Active
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2007
- 2007-08-27 TW TW096131675A patent/TWI378181B/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012924A (en) * | 2020-08-22 | 2020-12-01 | 苏州讯如电子科技有限公司 | Gear type pressure regulating oil pump with harmonic molded lines |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101146501B1 (en) | 2012-05-29 |
| JPWO2008029477A1 (en) | 2010-01-21 |
| TWI378181B (en) | 2012-12-01 |
| CN101512158B (en) | 2013-11-06 |
| KR20090042291A (en) | 2009-04-29 |
| JP4952719B2 (en) | 2012-06-13 |
| WO2008029477A1 (en) | 2008-03-13 |
| TW200813331A (en) | 2008-03-16 |
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