CN102146903A - Axial piston pump of swash plate design - Google Patents
Axial piston pump of swash plate design Download PDFInfo
- Publication number
- CN102146903A CN102146903A CN2011100361063A CN201110036106A CN102146903A CN 102146903 A CN102146903 A CN 102146903A CN 2011100361063 A CN2011100361063 A CN 2011100361063A CN 201110036106 A CN201110036106 A CN 201110036106A CN 102146903 A CN102146903 A CN 102146903A
- Authority
- CN
- China
- Prior art keywords
- hinge member
- swash plate
- piston pump
- hinge
- axial piston
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining means
Abstract
An axial piston pump of swash plate design comprises a cylindrical drum which is rotatably supported in a housing and has a plurality of cylindrical bores with pistons longitudinally displaceable therein which rest against a swash plate via a joint. The joint has a first joint part with a spherical head and a second joint part with a spherical seat for the head. The joint can be manufactures quickly using simple, economical production engineering, in that the first joint part is rotatably held in the second joint part, which has an annular groove in the inner surface of a tubular edge, into which a wire has been introduced through a bore.
Description
Technical field
The present invention relates to a kind of axial piston pump of inclined disc type structure.
Background technique
Disclosed such axial piston pump has the cylinder barrel of a rotatable support in housing, this cylinder barrel has a plurality of cylinders hole, in the cylinder hole, has vertical piston mobile, these pistons pass through a hinge support on a swash plate, wherein, hinge has second hinge member that first hinge member that has a ballhead and have the accommodating part of the sphere that is used to hold head.
Usually hinge has the function that contacts that guarantees the working surface of hinge member and swash plate in each oblique position of swash plate.
In common hinge joint, have first hinge member of ballhead and adaptive connection of second hinge member shape after insertion of correspondence with spherical accommodating part, its way is that the fringe region of second hinge member for example blocks first hinge member by crimping or joint (F ü gen).It is very bothersome aspect manufacturing technology to make such hinge.Hinge member is made by different materials.In order to make the edge shaping of the hinge member with spherical accommodating part on the one hand, this hinge member normally is made of softer material.In order to satisfy in requirement high aspect the wearing and tearing, this hinge member with ballhead is again to be made by harder material on the other hand.Need special instrument in order to carry out crimping or to engage, these instruments make the production process cost very high.
Make that by the head that blocks sphere described herein this hinge joint is irreversible.
Summary of the invention
Task of the present invention is to improve the axial piston pump of the inclined disc type structure type of the preamble feature with claim 1 so further, can be fast, manufacturing technology is simple and cost is advantageously set up the hinge joint.
This task is accomplished by the feature that additionally is equipped with claim 1 characteristic for the axial piston pump of the inclined disc type structure type of the preamble feature with claim 1.
In the axial piston pump according to inclined disc type structure type of the present invention, first hinge member remains in second hinge member rotationally, and its way is that second hinge member has circular groove in the internal surface at tubular edge.A wire rod is incorporated in this circular groove by a hole.
Hinge joint according to the present invention has a plurality of advantages.
This hinge joint cost is obviously more favourable, because saved special forming tool, and be used for the needed Master Cost of hinge joint be used to be provided with circular groove and the manufacturing technology aspect that is used to punch measure produced becomes this part especially little.
Hinge joint according to the present invention can be fast and these hinge members is installed simply.First hinge member remains in second hinge member rotationally, and its way is by with the tangential hole of extending of the circumference of circular groove wire rod being incorporated in the circular groove of second hinge member after setting hinge components.
This hinge joint is knock-down, and can little expense rebulid this hinge joint.
In the dependent claims some the favourable schemes according to the axial piston pump of inclined disc type structure type of the present invention are illustrated.
According to a particularly preferred scheme of the present invention, first hinge member with ballhead is formed on the piston, and second hinge member with spherical accommodating part is supported on the swash plate.Though structure of piston is long, ballhead is smaller.
If first hinge member is supported on the swash plate, and second hinge member is formed on the piston, and then piston structure is a little slightly short.Spherical more bigger, and therefore produce comprehensive static pressure unloading.
Have a end face by second hinge member towards first hinge member, and circular groove be arranged on this end face neighbouringly then can when making tubular edges, for example process this circular groove easily and simply with lathe tool.
Circumference by hole and circular groove tangentially extends, and can simply wire rod be incorporated in this circular groove from the outside.
Preferably this wire rod is a kind of spring wire.So it can be set in the circular groove especially simply because it has good crooking ability and elasticity capacity.This spring wire is engaged in this circular groove by its rebound characteristics after inserting fully, and can not keep still rotating piston head with losing.
When first hinge member is supported on the swash plate, and have spheroid form, then structure of piston is the shortest, and can save the formation piston shoes.
When first hinge member is that a plane earth is supported on the piston shoes on the swash plate, then the contact surface between hinge and the swash plate is bigger.
The task of piston shoes is to make the contact between piston and swash plate that enough static pressure unloadings be arranged, and therefore allows this contact to have high bearing capacity.Ballhead is bigger then, and makes hinge static pressure unloading all sidedly.
When second hinge member be a plane earth when being supported on piston shoes on the swash plate contact surface between hinge and the swash plate bigger.
The task of piston shoes is to make the contact between piston and the swash plate that enough static pressure unloadings be arranged in this scheme, and therefore allows this contact to have high bearing capacity.The ballhead that is shaped on piston then is less, and hinge is narrower.
Description of drawings
Some embodiments of axial piston pump according to inclined disc type structure type of the present invention shown in the drawings.By these accompanying drawings the present invention is described in more details now.
These accompanying drawings are:
Fig. 1: according to the part longitdinal cross-section diagram of the axial piston pump of inclined disc type structure type of the present invention.
Fig. 2: longitdinal cross-section diagram with hinge joint of the spherical accommodating part on ballhead and the piston.
Fig. 3: longitdinal cross-section diagram with hinge joint of the piston shoes of plane bearing of the ballhead that has shaping and the spherical accommodating part on piston.
Fig. 4: longitdinal cross-section diagram with hinge joint of the piston shoes of the planar support that has spherical accommodating part and the ballhead on piston.
Fig. 5: the longitdinal cross-section diagram of the tubular edges of hinge joint.
The top view of the hinge joint of Fig. 6: Fig. 3.
Fig. 7: the longitdinal cross-section diagram of the hinge joint by circular groove.
Embodiment
The piston 7 that vertically is directed to movably in cylinder hole 6 is preferably cylindrical design.The end that deviates from the cylinder barrel side of piston 7 is supported on the swash plate 11 by a hinge 10 respectively.These swash plate 11 driven shafts 4 pass.Not shown in this drawing it be designed to have the swing reel cage of supporting swingably of semi-cylindrical cross section, and in corresponding swing position, can regulate ground and be provided with by a controlling device 12.Side that faces cylinder barrel 5 at it forms a working surface 13.
When live axle 4 rotates owing to be not relatively rotate to connect this cylinder barrel 5 and rotate together with piston 7.These pistons 7 are finished stroke movement when swinging to one oblique position by operating regulation device 12 these swash plates 11 with respect to cylinder barrel 5.Suction of each piston experience and compression stroke when cylinder barrel 5 rotates a whole circle wherein produce corresponding oil stream.Finish the conveying and the discharge of oil stream by unshowned remittance passage, control panel 9 and unshowned pressure and suction passage.
Now Fig. 2,3 and Fig. 4 the hinge 10 of different designs is shown.These hinge support are passed through on the working surface 13 of swash plate 11 in the end that deviates from the cylinder barrel side of piston 7.Each hinge 10 has first hinge member 20 that has a ballhead 21 and one and has spherical voids 23, and second hinge member 22 of a tubular edges 30.This first hinge member 20 is maintained in second hinge member 22, and its way is that second hinge member 22 has a circular groove 31 in the internal surface of tubular edges 30.A wire rod 40 is incorporated in this circular groove 31 by a hole 32.Spherical voids 23 is enclosed the first half that sticks ballhead 21.21 Lower Half nearly half sink in the tubular edge 30.
In Fig. 2, second hinge member 22 has spherical space 23 on the end that deviates from the cylinder barrel side of piston 7.First hinge member of rotatably support has the shape of spheroid 25 in second hinge member 22.The load piston 7 that alleviates hinge 10 for static pressure ground has a straight-through passage 26 along the medial axis.The opening 27 1 of this put-through channel 26 8 logical radial expansion from the plunger compartment is through to the space 23 of sphere.
Have spherical 21 according to Fig. 4 first hinge member 20 on the end that deviates from the cylinder barrel side of piston 7.21 of this sphere is rotatably supported in the space 23 of sphere of second hinge member 22.Second hinge member 22 is the piston shoes 24 with planar support of spherical voids 23.This ballhead 21 of load that alleviates hinge member 10 for static pressure ground has a straight-through passage 26 along the medial axis.This straight-through passage is the spherical space 23 of 8 feedings from the plunger compartment.Put-through channel 28 forms along the medial axis of piston shoes, and this put-through channel imports in the pressure bag 29, and has the opening 27 of a radial expansion in the first side of piston.Hydraulic oil is provided for piston shoes surface with 28 with being connected of pressure bag 29 through straight-through through hole 26 by plunger compartment 8, alleviates the load of piston shoes 24 with static pressure ground.
Fig. 5 shows the partial graph of Fig. 2.The changeover portion 33 of truncated cone shape couples together tubular edge 30 and spherical space 23, and like this, the inner diameter at tubular edge 30 is more bigger than the inner diameter in spherical space 33.Circular groove 31 submarginal end faces 34 ground are arranged on the internal surface of tubular edges 30.Tubular edges 30 is repaiied the garden with one of circular groove 31 towards end face 34 directions, and slightly short groove side 35 finishes.
Fig. 6 illustrates the top view of the hinge joint of Fig. 3.Second hinge member 22 that has spherical voids 23 in this top view is formed on the end that deviates from the cylinder barrel side of piston 7, and will be in second hinge member 22 first hinge member 20 of rotatable support be designed to have the piston shoes 24 that the plane earth of the ballhead 21 that has flange supports.Hole 32 is provided with near the end face 34 of tubular edges 30.
Fig. 7 illustrates the cross-sectional view by the hinge joint in hole 32.This hole 32 tangentially imports in the circular groove 31.The inner diameter in hole 32 is suitable with the width of circular groove 31 in Fig. 7.Wire rod 40 does not remain on ballhead 21 in the spherical space 23 with not losing.The length of wire rod 40 is more smaller than the circumference of circular groove 31, and like this, wire rod 40 extends along circular groove 31 fully, makes wire rod 40 that uniform load be arranged.
Finish the installation of hinge in a kind of simple especially mode, its way be first hinge member 20 is arranged on second hinge member 22 after with wire rod 40, for example a spring wire is incorporated in the circular groove 31 by hole 32, perhaps also injection.The cross section of the cross section of wire rod 40 and circular groove 31 is suitable.Wire rod 40 tangentially is installed in the circular groove.Wire rod 40 after putting fully and is not keeping still rotating ballhead 21 because its rebound characteristics is engaged in the circular groove 31 with losing.
Particularly also working surface 13 can be designed to independently parts about Fig. 2,3 and 4.Independently working surface when designing, piston shoes is not set usually.Piston shoes directly move on the swash plate face.In spheroid piston scheme, be favourable, because also can use the bearing part of standard in this case from become present technique and function technological standpoint to see carrying out working surface independently integrated.
About the hole in the tubular edges 30 32, its diameter needn't be forcibly corresponding to the width of circular groove 31.Yet this diameter must be greater than the diameter of wire rod 40.The tangential trend in hole 32 is not compulsory, yet it has simplified the importing of wire rod 40.Hole 32 also can slightly inwardly shift to install with respect to the outer diameter of circular groove 31, can prevent that like this wire rod 40 from skidding off.
The spring element of preferably a kind of elongated rod of wire rod 40.It is linearly extended at relaxed state.Yet do not require this design forcibly yet.Wire rod 40 also can be the spring element of annular.But this point always requires to accomplish, be that this wire rod is outer setting when packing state into, perhaps the installing space of wire rod 40 so designs by the conveying of side, and promptly wire rod 40 can not run out of forward, has so just guaranteed that ballhead 21 can not keep with losing.
Carry the design of wire rod 40 piston shoes to also have additional advantage by side ground, promptly the gap between piston 7 and the piston shoes 24 can keep than little when importing from the front.
Claims (9)
1. the axial piston pump of inclined disc type structure type (1), it has the cylinder barrel (5) of rotatably support in housing (3), this cylinder barrel has a plurality of cylinders hole (6), in the cylinder hole, has vertical piston mobile (7), these pistons are supported on the swash plate (11) by hinge (10), wherein, hinge (10) has first hinge member (20) that has ballhead (21) and has second hinge member (22) of the accommodating part (23) of the sphere that is used for head (21), it is characterized in that, first hinge member (20) remains in second hinge member (22) rotationally, mode is, second hinge member (22) has circular groove (31) in the internal surface of tubular edges (30), wire rod (40) is incorporated in this circular groove by hole (32).
2. according to the described axial piston pump of claim 1 (1), it is characterized in that first hinge member (20) is formed on the piston (7), and second hinge member (22) is supported on the swash plate (11).
3. according to the described axial piston pump of claim 1 (1), it is characterized in that first hinge member (20) is supported on the swash plate (11), and second hinge member (22) is formed on the piston (7).
4. according to each described axial piston pump (1) of aforementioned claim, it is characterized in that second hinge member (22) has the end face (34) towards first hinge member (20), and circular groove (31) is provided with near end face (34).
5. according to each described axial piston pump (1) of aforementioned claim, it is characterized in that the circumference of hole (32) and circular groove (31) extends tangently, and is passed in this circular groove (31).
6. according to each described axial piston pump (1) of aforementioned claim, it is characterized in that wire rod (40) is a spring wire.
7. according to claim 1,3,4, each described axial piston pump (1) of 5 or 6, it is characterized in that first hinge member (20) is supported on that swash plate (11) is gone up and it has the shape of spheroid (25).
8. according to claim 1,3,4, each described axial piston pump (1) of 5 or 6, it is characterized in that first hinge member (20) is that plane earth is supported on the piston shoes (24) on the swash plate (11).
9. according to claim 1,2,4, each described axial piston pump (1) of 5 or 6, it is characterized in that second hinge member (22) is that plane earth is supported on the piston shoes (24) on the swash plate (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010006908A DE102010006908A1 (en) | 2010-02-05 | 2010-02-05 | Axial piston machine in swash plate design |
| DE102010006908.6 | 2010-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102146903A true CN102146903A (en) | 2011-08-10 |
Family
ID=43975412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100361063A Pending CN102146903A (en) | 2010-02-05 | 2011-02-09 | Axial piston pump of swash plate design |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110192276A1 (en) |
| CN (1) | CN102146903A (en) |
| DE (1) | DE102010006908A1 (en) |
| IT (1) | IT1403313B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907317A (en) * | 2015-11-11 | 2017-06-30 | 林德液压两合公司 | The hydrostatic axial piston machine of inclined shaft frame mode |
| CN107002632A (en) * | 2014-12-09 | 2017-08-01 | 大金工业株式会社 | Hydraulic means |
| CN114008339A (en) * | 2019-08-21 | 2022-02-01 | 舍弗勒技术股份两合公司 | Pivot bracket bearing and method for producing a synchronization device for a pivot bracket bearing |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2502623A (en) * | 2012-06-01 | 2013-12-04 | Rolls Royce Engine Control Systems Ltd | Piston device with mechanism to secure piston to slipper |
| CH714838A1 (en) * | 2018-03-22 | 2019-09-30 | Liebherr Machines Bulle Sa | Piston shoe unit for an axial piston machine. |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1001387A (en) * | 1961-06-24 | 1965-08-18 | Hydromatik G M B H | Improvements in or relating to swash plate mechanisms |
| US3941493A (en) * | 1973-10-11 | 1976-03-02 | Societe Nouvelle De Roulements | Device for mounting spherical piston-rod ends of barrel-type hydraulic machine |
| DE19636274A1 (en) * | 1996-09-06 | 1998-03-12 | Sauer Sundstrand Gmbh & Co | Sliding bearing in e.g. hydraulic motor |
| JP2000009025A (en) * | 1998-06-19 | 2000-01-11 | Honda Motor Co Ltd | Plunger assembly in axial plunger type hydraulic unit |
| JP2004084660A (en) * | 2002-06-10 | 2004-03-18 | Ebara Corp | Axial piston pump or motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1868891A (en) * | 1928-10-09 | 1932-07-26 | Faudi Fritz | Coupling |
| US5743090A (en) * | 1995-09-29 | 1998-04-28 | Barrowman; Andrew W. | Hydraulic torque transmitter and synchronizer |
| DE10341791B4 (en) * | 2003-09-10 | 2005-09-29 | Brueninghaus Hydromatik Gmbh | Hollow piston for a piston engine and method for producing a hollow piston |
| DE102006057364B4 (en) * | 2006-12-04 | 2011-08-25 | Danfoss A/S | Water hydraulic machine |
-
2010
- 2010-02-05 DE DE102010006908A patent/DE102010006908A1/en not_active Withdrawn
-
2011
- 2011-01-24 US US13/012,135 patent/US20110192276A1/en not_active Abandoned
- 2011-01-25 IT ITMI2011A000076A patent/IT1403313B1/en active
- 2011-02-09 CN CN2011100361063A patent/CN102146903A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1001387A (en) * | 1961-06-24 | 1965-08-18 | Hydromatik G M B H | Improvements in or relating to swash plate mechanisms |
| US3941493A (en) * | 1973-10-11 | 1976-03-02 | Societe Nouvelle De Roulements | Device for mounting spherical piston-rod ends of barrel-type hydraulic machine |
| DE19636274A1 (en) * | 1996-09-06 | 1998-03-12 | Sauer Sundstrand Gmbh & Co | Sliding bearing in e.g. hydraulic motor |
| JP2000009025A (en) * | 1998-06-19 | 2000-01-11 | Honda Motor Co Ltd | Plunger assembly in axial plunger type hydraulic unit |
| JP2004084660A (en) * | 2002-06-10 | 2004-03-18 | Ebara Corp | Axial piston pump or motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107002632A (en) * | 2014-12-09 | 2017-08-01 | 大金工业株式会社 | Hydraulic means |
| CN107002632B (en) * | 2014-12-09 | 2018-06-26 | 大金工业株式会社 | Hydraulic device |
| CN106907317A (en) * | 2015-11-11 | 2017-06-30 | 林德液压两合公司 | The hydrostatic axial piston machine of inclined shaft frame mode |
| CN106907317B (en) * | 2015-11-11 | 2021-09-24 | 林德液压两合公司 | Hydrostatic axial piston machine with inclined shaft |
| CN114008339A (en) * | 2019-08-21 | 2022-02-01 | 舍弗勒技术股份两合公司 | Pivot bracket bearing and method for producing a synchronization device for a pivot bracket bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1403313B1 (en) | 2013-10-17 |
| DE102010006908A1 (en) | 2011-08-11 |
| US20110192276A1 (en) | 2011-08-11 |
| ITMI20110076A1 (en) | 2011-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110810 |