CN103256220B - Gear pump and engineering machinery - Google Patents
Gear pump and engineering machinery Download PDFInfo
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- CN103256220B CN103256220B CN201310164893.9A CN201310164893A CN103256220B CN 103256220 B CN103256220 B CN 103256220B CN 201310164893 A CN201310164893 A CN 201310164893A CN 103256220 B CN103256220 B CN 103256220B
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- gear pump
- module
- end cover
- rear end
- axle
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Abstract
The invention discloses a gear pump which comprises a front end cover (1), a rear end cover (3) and a pump body (2) connected between the front end cover (1) and the rear end cover (3), wherein the pump body (2) is provided with a transmission input shaft (6) extending out of the rear end cover, the gear pump also comprises a connecting module, the connecting module comprises an end cover (8) and a module shaft (9), the end cover (8) is fixedly connected with the rear end cover (3), one end of the module shaft (9) is connected with the transmission input shaft (6), and the other end of the module shaft extends out of the module end cover (8). In addition, the invention also discloses engineering machinery comprising the gear pump. The connecting module not only ensures the coaxiality of the output shaft of the engine or the gearbox and the gear pump, but also prevents hydraulic oil from leaking into the engine or the gearbox.
Description
Technical field
The present invention relates to the Hydraulic Power Transmission System of engineering machinery, particularly, relate to a kind of gear pump and comprise the engineering machinery of this gear pump.
Background technique
At present, in hydraulic transmission field, gear pump obtains application widely because of advantages such as its cost are low, system is simple as power source.In the installation of gear pump, usually have two kinds of mounting types in prior art, the first is connected with motor or gearbox by gear pump by transmission shaft etc.; The second is directly installed on motor or gearbox by gear pump.The defect of the first mounting type above-mentioned is: due to reasons such as making, installation, transmission shaft strengths, can not reach absolute coaxial between the input shaft three of the output shaft of motor or gearbox, transmission shaft, gear pump, always exist each other and beat or vibration, like this, when transmission shaft is in the process of quick rotation, due to the existence of beating, certainly will have an impact to the bearing of gear pump, motor or gearbox and Sealing, after long working, its working life must be affected; The defect of above-mentioned the second mounting type is: because be directly installed on motor or gearbox by gear pump, so gear pump occur shaft seal aging, damage and leakage of oil time, hydraulic oil can enter in motor or gearbox, affects its lubrication system or makes it burn out.
Given this, need to design a kind of novel gear pump, to overcome or to alleviate above-mentioned defect of the prior art.
Summary of the invention
The object of this invention is to provide a kind of gear pump, this gear pump can either prevent hydraulic oil from leaking outside in motor or gearbox, can ensure again the output shaft of motor or gearbox and the transmission coaxality of gear pump preferably.
To achieve these goals, the invention provides a kind of gear pump, the pump housing that this gear pump comprises front cover, rear end cover and is connected between described front cover and rear end cover, the described pump housing has the transmission input shaft stretching out described rear end cover, and wherein, described gear pump also comprises link block, this link block comprises module end cap and module axle, described module end cap is fixedly connected with described rear end cover, and one end of described module axle is connected to described transmission input shaft, and the other end stretches out described module end cap.
Preferably, described rear end cover extends outward a holding space to assemble described link block.
Preferably, the sidewall of described rear end cover is provided with drain tap, and described drain tap is positioned in the radial direction corresponding to described module axle and transmission input shaft link position.
Preferably, described link block also comprises the module bearing between described rear end cover and described module axle.
Preferably, described link block also comprises the fixed base between described rear end cover and described module axle, inside described fixed base and between described module axle, there is module shaft seal, and described module bearing, fixed base and module end cap three axially arrange successively along described module axle.
Preferably, be provided with groove to the external circumferential of described fixed base, this groove is built with seal ring.
Preferably, also back-up ring is provided with between described module bearing and described fixed base.
Preferably, one end of described module axle and described drive input spline joint.
Preferably, also shaft seal is provided with between described rear end cover and transmission input shaft.
On the basis of the technological scheme of said gear pump, the present invention also provides a kind of engineering machinery, this project machinery comprises motor and gear pump, wherein, described gear pump is the gear pump described in technique scheme of the present invention, the described module axle on this gear pump and the output shaft spline joint of described motor.
Pass through technique scheme, the link block that increases newly and gear pump is made to connect as one structure, then the module axle of link block is connected with motor or gearbox, can ensure that the output shaft of motor or gearbox and the alignment of gear pump are to improve the working life of gear pump, motor or gearbox preferably, this link block prevents hydraulic oil to leak outside in motor or gearbox simultaneously, thus avoids the hydraulic oil that leaks outside and affect the lubrication system of motor or gearbox or make it burn out.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the sectional view of the gear pump according to one embodiment of the present invention.
Fig. 2 is the schematic diagram be connected with motor according to the gear pump of one embodiment of the present invention.
Description of reference numerals
1 front cover 2 pump housing
3 rear end cover 4 shaft seals
5 drain tap 6 transmission input shaft
7 module shaft seal 8 module end caps
9 module axle 10 module bearings
11 first gear 12 minor axises
13 second gear 14 fixed bases
15 back-up ring 20 motors
21 output shaft 22 bolts
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
According to an aspect of the present invention, as shown in Figure 1, there is provided a kind of gear pump, the pump housing 2 that this gear pump comprises front cover 1, rear end cover 3 and is connected between front cover 1 and rear end cover 3, the pump housing 2 has the transmission input shaft 6 stretching out rear end cover 3, wherein, this gear pump also comprises link block, and this link block comprises module end cap 8 and module axle 9, and module end cap 8 is fixedly connected with rear end cover 3, one end of module axle 9 is connected to transmission input shaft 6, and the other end stretches out module end cap 8.
In technique scheme, structure is connected as one owing to making the link block that increases newly and gear pump, then the module axle of link block is connected with motor or gearbox, can ensure that the output shaft of motor or gearbox and the alignment of gear pump are to improve the working life of gear pump, motor or gearbox preferably, gear pump and motor are separated a determining deviation by this link block simultaneously, prevent hydraulic oil to leak outside in motor or gearbox, thus avoid the hydraulic oil that leaks outside and affect the lubrication system of motor or gearbox or make it burn out.
As can be seen from Figure 1, rear end cover 3 extends outward a holding space to assemble described link block, and the requirement structurally meeting link block and gear pump and connect as one like this, really ensure that the alignment of gear pump and motor or gearbox.
According to the embodiment of the present invention, as shown in Figure 1, the sidewall of rear end cover 3 is provided with drain tap 5, drain tap 5 is positioned in the radial direction corresponding to module axle and transmission input shaft 6 link position.Like this, once rear end cover 3 around chamber in there is the hydraulic oil that leaks outside, this hydraulic oil will flow out from drain tap 5.Here, obviously the plug cock supporting with this drain tap 5 or oil cap can also be set, to make when gear pump is in off working state, this drain tap 5 can be closed and enter into gear pump to prevent extraneous impurity.
Keep module axle 9 central position to fix in order to the friction factor that reduces in power transmission process, link block 9 also comprises the module bearing 10 between rear end cover 3 and module axle 9.
Leak outside in motor or gearbox to prevent hydraulic oil further, preferably, link block also comprises the fixed base 14 between rear end cover 3 and module axle 9, be provided with module shaft seal 7 in case leak-stopping is oily inside fixed base 14 and between described module axle 9, and described module bearing 10, fixed base 14 and module end cap 8 three axially arrange successively along described module axle 9.
Preferably, be provided with groove to the external circumferential of described fixed base 14, this groove is built with seal ring.The number of turns of groove and seal ring can be a circle, two enclose or two enclose more than, do not limit here, as long as ensure that easily manufactured property has been taken into account to realize the function that it prevents leakage of oil simultaneously.
In addition, back-up ring 15 is also provided with between module bearing 10 and described fixed base 14.The setting of back-up ring 15, both served position-limiting action to module bearing 10, prevented again module shaft seal 7 when pump carries out operating or module shaft seal is installed to module bearing 10 play, and then served certain protective action to parts such as module bearing 10 and module shaft seals 7.
According to the embodiment of the present invention, one end of module axle 9 and major axis input end spline joint.Obviously, be understandable that other the Placement that can ensure power transmission between module axle 9 and transmission input shaft 6 all should fall within protection scope of the present invention, repeat no more here.
In addition, preferably, shaft seal 4 is also provided with between rear end cover 3 and transmission input shaft 6 in case leak-stopping is oily.
As shown in Figure 2, according to another aspect of the present invention, present invention also offers a kind of engineering machinery, this project machinery comprises motor 20 and gear pump, wherein, this gear pump is the gear pump described in technique scheme, the module axle 9 on this gear pump and output shaft 21 spline joint of motor.
Wherein, the body of motor 20 is connected with the link block of gear pump by bolt 22, and the other end spline joint of the output shaft 21 of motor 20 and module axle 9, thus the transmission of power between motor and gear pump can be realized.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a gear pump, this gear pump comprises front cover (1), rear end cover (3) and the pump housing (2) be connected between described front cover (1) and rear end cover (3), the described pump housing (2) has the transmission input shaft (6) stretching out described rear end cover (3), it is characterized in that, described gear pump also comprises link block, this link block comprises module end cap (8) and module axle (9), described module end cap (8) is fixedly connected with described rear end cover (3), one end of described module axle (9) is connected to described transmission input shaft (6), the other end stretches out described module end cap (8), the sidewall of described rear end cover (3) is provided with drain tap (5), and described drain tap (5) is positioned at corresponding to described module axle (9) with in the radial direction of transmission input shaft (6) link position.
2. gear pump according to claim 1, is characterized in that, described rear end cover (3) extends outward a holding space to assemble described link block.
3. gear pump according to claim 1 and 2, is characterized in that, described link block also comprises the module bearing (10) be positioned between described rear end cover (3) and described module axle (9).
4. gear pump according to claim 3, it is characterized in that, described link block also comprises the fixed base (14) be positioned between described rear end cover (3) and described module axle (9), between described fixed base (14) inner side and described module axle (9), there is module shaft seal (7), and described module bearing (10), fixed base (14) and module end cap (8) three axially arrange successively along described module axle (9).
5. gear pump according to claim 4, is characterized in that, be provided with groove to the external circumferential of described fixed base (14), this groove is built with seal ring.
6. gear pump according to claim 4, is characterized in that, is also provided with back-up ring (15) between described module bearing (10) and described fixed base (14).
7. gear pump according to claim 1 and 2, is characterized in that, one end of described module axle (9) and described transmission input shaft (6) spline joint.
8. gear pump according to claim 1 and 2, is characterized in that, is also provided with shaft seal (4) between described rear end cover (3) and transmission input shaft (6).
9. an engineering machinery, this project machinery comprises motor (20) and gear pump, it is characterized in that, described gear pump is gear pump as claimed in any of claims 1 to 8, the output shaft spline joint of the described module axle (9) on this gear pump and described motor (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164893.9A CN103256220B (en) | 2013-05-07 | 2013-05-07 | Gear pump and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164893.9A CN103256220B (en) | 2013-05-07 | 2013-05-07 | Gear pump and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103256220A CN103256220A (en) | 2013-08-21 |
| CN103256220B true CN103256220B (en) | 2016-04-20 |
Family
ID=48960366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310164893.9A Active CN103256220B (en) | 2013-05-07 | 2013-05-07 | Gear pump and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103256220B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259045A (en) * | 1978-11-24 | 1981-03-31 | Kayabakogyokabushikikaisha | Gear pump or motor units with sleeve coupling for shafts |
| JP2002013485A (en) * | 2000-06-30 | 2002-01-18 | Tokico Ltd | Gear pump |
| CN201162670Y (en) * | 2008-01-11 | 2008-12-10 | 詹建程 | Dual idler gear pump |
| CN201461397U (en) * | 2009-05-13 | 2010-05-12 | 河南豫通电机股份公司 | Transmission structure of hydraulic gear pump and motor |
| CN201621064U (en) * | 2010-03-18 | 2010-11-03 | 阜新众恒液压有限公司 | Double-rotary direction gear pump |
| CN102102667A (en) * | 2011-03-30 | 2011-06-22 | 浙江奥力电机股份有限公司 | Direct-connected integrated gear pump |
| CN202391732U (en) * | 2011-12-07 | 2012-08-22 | 愚公机械股份有限公司 | Integrated motor pump |
| CN202746193U (en) * | 2012-09-11 | 2013-02-20 | 阜新北星液压有限公司 | Direct-insertion type gear pump |
-
2013
- 2013-05-07 CN CN201310164893.9A patent/CN103256220B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259045A (en) * | 1978-11-24 | 1981-03-31 | Kayabakogyokabushikikaisha | Gear pump or motor units with sleeve coupling for shafts |
| JP2002013485A (en) * | 2000-06-30 | 2002-01-18 | Tokico Ltd | Gear pump |
| CN201162670Y (en) * | 2008-01-11 | 2008-12-10 | 詹建程 | Dual idler gear pump |
| CN201461397U (en) * | 2009-05-13 | 2010-05-12 | 河南豫通电机股份公司 | Transmission structure of hydraulic gear pump and motor |
| CN201621064U (en) * | 2010-03-18 | 2010-11-03 | 阜新众恒液压有限公司 | Double-rotary direction gear pump |
| CN102102667A (en) * | 2011-03-30 | 2011-06-22 | 浙江奥力电机股份有限公司 | Direct-connected integrated gear pump |
| CN202391732U (en) * | 2011-12-07 | 2012-08-22 | 愚公机械股份有限公司 | Integrated motor pump |
| CN202746193U (en) * | 2012-09-11 | 2013-02-20 | 阜新北星液压有限公司 | Direct-insertion type gear pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103256220A (en) | 2013-08-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Applicant after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410007 ZOOMLION grand pond Industrial Park, Yuanda Road, Changsha economic and Technological Development Zone, Changsha, Hunan 2, China Applicant before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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Free format text: CORRECT: ADDRESS; FROM: 410007 CHANGSHA, HUNAN PROVINCE TO: 410013 CHANGSHA, HUNAN PROVINCE |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |