CN103256220A - Gear pump and engineering machinery - Google Patents
Gear pump and engineering machinery Download PDFInfo
- Publication number
- CN103256220A CN103256220A CN2013101648939A CN201310164893A CN103256220A CN 103256220 A CN103256220 A CN 103256220A CN 2013101648939 A CN2013101648939 A CN 2013101648939A CN 201310164893 A CN201310164893 A CN 201310164893A CN 103256220 A CN103256220 A CN 103256220A
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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, the engineering machinery that relates to a kind of gear pump and comprise this gear pump.
Background technique
Advantages such as at present, in the hydraulic transmission field, gear pump is low because of its cost, system's simplicity of design have obtained using very widely as power source.Aspect the installation of gear pump, two kinds of mounting types are arranged in the prior art usually, first kind is by transmission shaft etc. gear pump to be connected with motor or gearbox; Second kind is that gear pump directly is installed on motor or the gearbox.The defective of above-mentioned first kind of mounting type is: owing to reasons such as making, installation, transmission shaft intensity, can not reach absolute coaxial between the input shaft three of the output shaft of motor or gearbox, transmission shaft, gear pump, always existence is beated or is gone here and there moving each other, like this, when transmission shaft is in the process of quick rotation, because the existence of beating certainly will exert an influence to bearing and the Sealing of gear pump, motor or gearbox, after the long working, must influence its working life; The defective of above-mentioned second kind of mounting type is: because gear pump directly is installed on motor or the gearbox, so occur at gear pump that the axle envelope is aging, when damage and leakage of oil, hydraulic oil can enter in motor or the gearbox, influences its lubrication system or it is burnt out.
Given this, need a kind of novel gear pump of design, to overcome or to alleviate above-mentioned defective of the prior art.
Summary of the invention
The purpose of this invention is to provide a kind of gear pump, this gear pump can either prevent that hydraulic oil from leaking outside to motor or gearbox, can guarantee the transmission coaxality of output shaft and the gear pump of motor or gearbox again preferably.
To achieve these goals, the invention provides a kind of gear pump, this gear pump comprises front cover, rear end cover and is connected in the pump housing between described front cover and the rear end cover, the described pump housing has the transmission input shaft that stretches out described rear end cover, and wherein, described gear pump also comprises link block, this link block comprises end cap and module axle, described end cap is fixedlyed connected with described rear end cover, and an end of described module axle is connected in 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 the footpath that described drain tap is positioned at corresponding to described module axle and transmission input shaft link position makes progress.
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, have the module axle envelope between described fixed base inboard and the described module axle, and described module bearing, fixed base and module end cap three arrange successively axially along described module axle.
Preferably, be provided with groove to the external circumferential of described fixed base, in this groove seal ring be housed.
Preferably, also be provided with back-up ring between described module bearing and the described fixed base.
Preferably, an end of described module axle is connected with described transmission input end spline.
Preferably, also be provided with the axle envelope between described rear end cover and the 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 described gear pump of technique scheme of the present invention, and the described module axle on this gear pump is connected with the output shaft spline of described motor.
Pass through technique scheme, make newly-increased link block and gear pump connect as one structure, module axle with link block links to each other with motor or gearbox then, can guarantee preferably that the alignment of the output shaft of motor or gearbox and gear pump is to improve the working life of gear pump, motor or gearbox, this link block has prevented that hydraulic oil from leaking outside to motor or gearbox simultaneously, thereby the hydraulic oil of having avoided leaking outside influences the lubrication system of motor or gearbox or it is burnt out.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sectional view according to the gear pump of one embodiment of the present invention.
Fig. 2 is the schematic representation that the gear pump according to one embodiment of the present invention is connected with motor.
Description of reference numerals
1 front cover, 2 pump housings
4 envelopes of 3 rear end covers
5 drain taps, 6 transmission input shafts
7 module axles seal 8 module end caps
9 module axles, 10 module bearings
11 first gears, 12 minor axises
13 second gears, 14 fixed bases
15 back-up rings, 20 motors
21 output shafts, 22 bolts
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
In the present invention, under the situation of not doing opposite explanation, the noun of locality of use is as the upper and lower, left and right shown in " upper and lower, left and right " typically refer to reference to the accompanying drawings; " inside and outside " refers to inside and outside with respect to the profile of each parts itself.
According to an aspect of the present invention, as shown in Figure 1, a kind of gear pump is provided, this gear pump comprise front cover 1, rear end cover 3 and be connected in front cover 1 and rear end cover 3 between the pump housing 2, the pump housing 2 has the transmission input shaft 6 that stretches out rear end cover 3, wherein, this gear pump also comprises link block, and this link block comprises end cap 8 and module axle 9, and end cap 8 is fixedlyed connected with rear end cover 3, one end of module axle 9 is connected in transmission input shaft 6, and the other end stretches out module end cap 8.
In technique scheme, owing to make newly-increased link block and gear pump connect as one structure, module axle with link block links to each other with motor or gearbox then, can guarantee preferably that the alignment of the output shaft of motor or gearbox and gear pump is to improve the working life of gear pump, motor or gearbox, this link block separates a determining deviation with gear pump and motor simultaneously, prevented that hydraulic oil from leaking outside to motor or gearbox, thereby the hydraulic oil of having avoided leaking outside influences the lubrication system of motor or gearbox or it is burnt out.
As can be seen from Figure 1, rear end cover 3 extends outward a holding space to assemble described link block, is structurally satisfying the requirement that link block and gear pump connect as one like this, has really guaranteed 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, and the footpath that drain tap 5 is positioned at corresponding to module axle and transmission input shaft 6 link positions makes progress.Like this, in case when occurring leaking outside hydraulic oil in the chamber that rear end cover 3 centers on, this hydraulic oil will flow out from drain tap 5.Here, plug cock or the oil cap supporting with this drain tap 5 can also be set obviously, so that when gear pump is in off working state, can seals this drain tap 5 and enter into gear pump to prevent extraneous impurity.
In order to reduce the friction factor in the power transmission process and to keep module axle 9 central positions to fix, link block 9 also comprises the module bearing 10 between rear end cover 3 and module axle 9.
In order to prevent that further hydraulic oil from leaking outside to motor or gearbox, preferably, link block also comprises the fixed base 14 between rear end cover 3 and module axle 9, fixed base 14 inboard with described module axle 9 between be provided with module axle envelope 7 in case leak-stopping oil, and described module bearing 10, fixed base 14 and module end cap 8 threes are along described module axle 9 layout successively axially.
Preferably, be provided with groove to the external circumferential of described fixed base 14, in this groove seal ring be housed.The number of turns of groove and seal ring can be more than a circle, two circles or two enclose, not do restriction here, has taken into account the function that realizes that it prevents leakage of oil simultaneously as long as guaranteed easily manufactured property.
In addition, also be provided with back-up ring 15 between module bearing 10 and the described fixed base 14.The setting of back-up ring 15 had both been played position-limiting action to module bearing 10, prevented again module axle envelope 7 pump turn round or the module axle envelope when installing to module bearing 10 plaies, and then module bearing 10 and module axle are sealed parts such as 7 have played the certain protection effect.
According to the embodiment of the present invention, an end of module axle 9 is connected with major axis input end spline.Obviously, be understandable that other the Placement that can guarantee power transmission between module axle 9 and the transmission input shaft 6 all should fall within protection scope of the present invention, repeat no more here.
In addition, preferably, also be provided with axle envelope 4 between rear end cover 3 and the transmission input shaft 6 in case leak-stopping oil.
As shown in Figure 2, according to another aspect of the present invention, the present invention also provides a kind of engineering machinery, this project machinery comprises motor 20 and gear pump, wherein, this gear pump is the gear pump described in the technique scheme, and the module axle 9 on this gear pump is connected with output shaft 21 splines of motor.
Wherein, the body of motor 20 links to each other with the link block of gear pump by bolt 22, and the output shaft 21 of motor 20 is connected with the other end spline of module axle 9, thereby can realize the transmission of power between motor and the gear pump.
Below describe preferred implementation of the present invention by reference to the accompanying drawings in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope 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.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up by any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various 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 (10)
1. gear pump, this gear pump comprises front cover (1), rear end cover (3) and be connected in described front cover (1) and rear end cover (3) between the pump housing (2), the described pump housing (2) has the transmission input shaft (6) that stretches out described rear end cover (3), it is characterized in that, described gear pump also comprises link block, this link block comprises end cap (8) and module axle (9), described end cap (8) is fixedlyed connected with described rear end cover (3), one end of described module axle (9) is connected in described transmission input shaft (6), and the other end stretches out described module end cap (8).
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, it is characterized in that, the sidewall of described rear end cover (3) is provided with drain tap (5), and the footpath that described drain tap (5) is positioned at corresponding to described module axle (9) and transmission input shaft (6) link position makes progress.
4. gear pump according to claim 1 and 2 is characterized in that, described link block also comprises the module bearing (10) that is positioned between described rear end cover (3) and the described module axle (9).
5. gear pump according to claim 4, it is characterized in that, described link block also comprises the fixed base (14) that is positioned between described rear end cover (3) and the described module axle (9), have module axle envelope (7) between described fixed base (14) inboard and the described module axle (9), and described module bearing (10), fixed base (14) and module end cap (8) three arrange successively axially along described module axle (9).
6. gear pump according to claim 5 is characterized in that, is provided with groove to the external circumferential of described fixed base (14), in this groove seal ring is housed.
7. gear pump according to claim 5 is characterized in that, also is provided with back-up ring (15) between described module bearing (10) and the described fixed base (14).
8. gear pump according to claim 1 and 2 is characterized in that, an end of described module axle (9) is connected with described transmission input shaft (6) spline.
9. gear pump according to claim 1 and 2 is characterized in that, also is provided with axle envelope (4) between described rear end cover (3) and the transmission input shaft (6).
10. engineering machinery, this project machinery comprises motor (20) and gear pump, it is characterized in that described gear pump is according to any described gear pump in the claim 1 to 9, the described module axle (9) on this gear pump is connected with the output shaft spline of 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 true CN103256220A (en) | 2013-08-21 |
| CN103256220B 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 |
|---|---|
| CN103256220B (en) | 2016-04-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| 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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| COR | Change of bibliographic data |
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 |