CN105863981A - Neutral position return mechanism used for swash plate type variable plunger pump - Google Patents
Neutral position return mechanism used for swash plate type variable plunger pump Download PDFInfo
- Publication number
- CN105863981A CN105863981A CN201610320092.0A CN201610320092A CN105863981A CN 105863981 A CN105863981 A CN 105863981A CN 201610320092 A CN201610320092 A CN 201610320092A CN 105863981 A CN105863981 A CN 105863981A
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- China
- Prior art keywords
- plate
- turning arm
- location
- plunger pump
- variable plunger
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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
- 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
- F04B1/26—Control
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides a neutral position return mechanism used for a swash plate type variable plunger pump. The neutral position return mechanism can make a swash plate automatically return to the neutral position and improves the controllability of the pump. The neutral position return mechanism comprises a positioning plate, a control panel, a first tensioning plate, a second tensioning plate and a spring, wherein the side face of the positioning plate is provided with a first limiting plate; the side face of the control panel is provided with a second limiting plate; the first tensioning plate is provided with a first oblique rotary arm and a first vertical rotary arm; the second tensioning plate is provided with a second oblique rotary arm and a second vertical rotary arm; the two ends of the spring are connected with the first oblique rotary arm and the second oblique rotary arm correspondingly; the first vertical rotary arm and the second vertical rotary arm are located on the two sides of the first limiting plate and the two sides of the second limiting plate correspondingly; when the control panel drives the first vertical rotary arm or the second vertical rotary arm to rotate, the spring is tensioned; and when the spring retracts, the first oblique rotary arm or the second oblique rotary arm rotates in the opposite direction, so that the control panel is located in the neutral position.
Description
Technical field
The present invention relates to a kind of plate variable plunger pump parts, be specifically related to a kind of return to neutral mechanism for plate variable plunger pump.
Background technology
Closed circuit hydrostatic drive system is big with its specific power, speed-regulating range width, low-speed stability are good, work efficiency is high, be prone to layout and have to realize the advantages such as stepless speed regulation, is widely applied in fields such as engineering machinery, building machinery, agricultural machinery.Closed circuit hydrostatic drive system many employings plate variable plunger pump as active energy element, its need to control swash plate pivot angle just can change hydraulic fluid flow rate, i.e. only one of which controllable pair as.The swash plate swinging angle control mode of swash plate plunger pump is varied, such as Non-follow control form, manual servo form, hydraulic control control form, servo of surging form and electro-hydraulic servo control form etc..The all-hydraulic agricultural machinery of China is in the starting stage, and the demand of plate variable plunger pump is grown with each passing day by it, but external Related product is expensive, differs greatly with current China peasant's purchasing power；And domestic swash plate plunger pump product quality is general, and structure is aging, control method is single, has lagged far behind Foreign Advanced Lerel.Current domestic swash plate plunger pump is based on Non-follow control form, low price, but the increase along with pumpage, manipulation force becomes big, and manipulation accuracy reduces, and its manipulation component is based on connecting rod, bracing wire, the gap produced in manufacture, installation process makes pump control to there is the biggest idle stroke, the swash plate centering difficulty of pump, is often in little pivot angle state, causes hydraulic system power waste, the consume of complete machine parts, handling difference.
Summary of the invention
It is an object of the present invention to provide a kind of return to neutral mechanism for plate variable plunger pump, it is possible to make swash plate auto-returned neutral position, strengthen the handling of pump.
For achieving the above object, the present invention is by the following technical solutions:
A kind of return to neutral mechanism for plate variable plunger pump, plate variable plunger pump includes pump case and rotating shaft, rotating shaft is connected with the swash plate of plate variable plunger pump, rotating shaft includes cylindrical shaft part and square shaft portion, return to neutral mechanism includes: location-plate, being connected or integrally formed therewith with the cylindrical shaft part of rotating shaft, side has the first limiting plate；Manipulation plate, shaft portion square with rotating shaft is connected or integrally formed therewith, and side has the second limiting plate；First tensioning plate, has the first oblique turning arm and first and founds turning arm；
Second tensioning plate, has the second oblique turning arm and second and founds turning arm；And spring, two ends connect the first oblique turning arm and the second oblique turning arm respectively；Wherein first founding turning arm and second and found turning arm and lay respectively at the first limiting plate and the second limiting plate both sides, location-plate and manipulation plate are detachably connected as a whole with pump case, and the first tensioning plate and the second tensioning plate shaft portion square with rotating shaft are detachably connected as a whole；When manipulate strip move first stand turning arm or second stand turning arm rotate time, spring is stretched；When spring contraction, the first oblique turning arm or the second oblique turning arm rotate round about, make manipulation plate be in neutral position.
The above-mentioned return to neutral mechanism for plate variable plunger pump, location-plate has the first hole, location, manipulation plate has the second hole, location, and bolt is connected with pump case through the first hole, location with the second hole, location, and bolt axis is parallel with shaft axis.
The above-mentioned return to neutral mechanism for plate variable plunger pump, it also includes connection assembly, connect assembly and include hold-down bolt, pad and axle sleeve, axle sleeve one end has the square hole coordinated with square shaft portion, the other end has internal thread hole, hold-down bolt sequentially passes through pad, the first tensioning plate and the second tensioning plate and is connected with axle sleeve, and hold-down bolt axis and shaft axis are on same straight line.
The above-mentioned return to neutral mechanism for plate variable plunger pump, between the cylindrical shaft part of location-plate and rotating shaft, between location-plate and manipulation plate, between the first tensioning plate and manipulation plate, between the second tensioning plate and axle sleeve, it is respectively arranged with nylon jacket, nylon jacket has the aperture for storing lubricating oil.
The above-mentioned return to neutral mechanism for plate variable plunger pump, the second hole, location includes left locating surface and right locating surface.
The above-mentioned return to neutral mechanism for plate variable plunger pump, manipulation plate has bracing wire hole.
The invention has the beneficial effects as follows:
When manipulate strip move first stand turning arm or second stand turning arm rotate time, spring is stretched；When spring contraction, the first oblique turning arm or the second oblique turning arm rotate round about, manipulation plate is made to be in neutral position, return to neutral mechanism of the present invention can make swash plate auto-returned neutral position, thus strengthen the handling of pump, and the spring in return to neutral mechanism can absorb the shake that swash plate is caused by hydraulic system pulsation, reduce component damage.
Accompanying drawing explanation
The invention will be further described below in conjunction with the accompanying drawings:
Fig. 1 is the return to neutral mechanism structural representation of plate variable plunger pump；
Fig. 2 is the return to neutral mechanism scheme of installation of plate variable plunger pump；
Fig. 3 is axle sleeve structure schematic diagram；
Fig. 4 is pivot structure schematic diagram.
Wherein, 1. pump case, 2 rotating shafts, 3. the first nylon jacket, 4. location-plate, 5. the second nylon jacket, 6. bolt, 7. manipulation plate, 8. spring, 9. the 3rd nylon jacket, 10. the first tensioning plate, 11. second tensioning plates, 12. the 4th nylon jacket, 13. axle sleeves, 14. pads, 15. hold-down bolts, 16. right locating surfaces, 17. left locating surfaces, 18. bracing wire holes, 19. second oblique turning arms, 20. first oblique turning arms, 21. second found turning arm, 22. second limiting plates, 23. first limiting plates, 24. first found turning arm, 25. second hole, location, 26. internal thread holes, 27. square shaft portion, 28. cylindrical shaft parts, 29. square holes.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, develop simultaneously embodiment referring to the drawings, and the present invention is described in more detail.
Plate variable plunger pump includes pump case 1 and rotating shaft 2, rotating shaft 2 includes cylindrical shaft part 28 and square shaft portion 27, rotating shaft 2 axis is vertical with pump case 1, rotating shaft 2 is connected with the swash plate of plate variable plunger pump, rotating shaft 2 rotates can change swashplate angle, thus controls hydraulic fluid flow rate and direction.
A kind of return to neutral mechanism for plate variable plunger pump, including location-plate 4, manipulation plate the 7, first tensioning plate 10 and spring 8；Location-plate 4 is connected or integrally formed therewith with the cylindrical shaft part 28 of rotating shaft 2, and side has first limiting plate 23 orthogonal with it；Manipulation plate 7 shaft portion square with rotating shaft 2 27 is connected or integrally formed therewith, and side has its orthogonal second limiting plate 22；First tensioning plate 10 is ring bodies, ring bodies circumferencial direction is provided with the first oblique turning arm 20 and first and founds turning arm 24；Second tensioning plate 11 is ring bodies, founds turning arm 21 along the oblique turning arm 19 of ring bodies circumferencial direction second and second；Spring 8 two ends connect the first oblique turning arm 20 and the second oblique turning arm 19 respectively；First founds turning arm 24 and second founds turning arm 21 and lays respectively at the first limiting plate 23 and the second limiting plate 22 both sides, location-plate 4 and manipulation plate 7 are detachably connected as a whole with pump case 1, and the first tensioning plate 10 and the second tensioning plate 11 shaft portion square with rotating shaft 2 27 are detachably connected as a whole.
In the present embodiment, location-plate 4 having the first hole, location, manipulation plate 7 has the second hole, location 25, bolt 6 is connected with pump case through the first hole, location with the second hole 25, location, and bolt 6 axis is parallel with rotating shaft 2 axis.
The present embodiment also includes connection assembly, connect assembly and include hold-down bolt 15, pad 14 and axle sleeve 13, axle sleeve 13 one end has the square hole 27 coordinated with square shaft portion 27, the other end has internal thread hole 26, hold-down bolt 15 sequentially passes through pad the 14, first tensioning plate 10 and the second tensioning plate 11 is connected with axle sleeve 13, and hold-down bolt 15 axis and rotating shaft 2 axis are on same straight line.
It is provided with between the cylindrical shaft part 28 of location-plate 4 and rotating shaft 2 in the present embodiment between the first nylon jacket 3, location-plate 4 and manipulation plate 7 to be provided with between second nylon jacket the 5, first tensioning plate 10 and manipulation plate 7 to be provided with between the 3rd nylon jacket the 9, second tensioning plate 11 and axle sleeve 13 and is provided with the 4th nylon jacket 12, the aperture for storing lubricating oil is had, it is possible to reduce friction each other in each nylon jacket.
In the present embodiment, the second hole, location includes left locating surface 17 and right locating surface 16.
The present embodiment manipulates on plate 7 and have multiple bracing wire hole 18, control crank can be connected to by linkage.
Utilize work process of the present invention as follows:
Plate variable plunger pump is when middle position, and first founds turning arm 24 and second founds turning arm 21 and lay respectively at the first limiting plate 23 and the second limiting plate 22 both sides, and now swash plate rotational angle is zero, plate variable plunger pump not output hydraulic pressure oil.In manipulation, shake control crank, by linkage, drive manipulation plate 7 to rotate, thus drive rotating shaft 2 to rotate, make swash plate change angle, plate variable plunger pump output hydraulic pressure oil.nullIf manipulation plate 7 rotates counterclockwise，Second limiting plate 22 drives the first tensioning plate 10 first to found turning arm 24 to rotate counterclockwise，The oblique turning arm of the first of first tensioning plate 10 20 is same to be rotated counterclockwise，The oblique turning arm 19 of the second of second tensioning plate 11 and second founds turning arm 21 and cannot be moved by the stop of the first limiting plate on location-plate 4，Spring 8 between the first oblique turning arm 20 and the second oblique turning arm 19 is stretched，When removing the external force being applied on manipulation plate 7，Spring 8 is under the effect of elastic force，The first oblique turning arm 20 is pulled to turn clockwise，Thus drive the second limiting plate 22 on manipulation plate 7 to turn clockwise，When returning to initial position，Spring 8 recovers to first dress state，First oblique turning arm 20 is by the stop stop motion of the first limiting plate 23 on location-plate 4，Manipulation plate 7 returns to neutral position；nullIf manipulation plate 7 turns clockwise，Second limiting plate 22 drives the second tensioning plate 11 turning arm 21 to turn clockwise，Another turning arm 19 of second tensioning plate 11 turns clockwise equally，The oblique turning arm 20 of two first of first tensioning plate 10、24 cannot be moved by the stop of the first limiting plate 23 on location-plate 4，Spring 8 between the first oblique turning arm 20 and the second oblique turning arm 19 is stretched，When removing the external force being applied on manipulation plate 7，Spring 8 is under the effect of elastic force，The second oblique turning arm 19 is pulled to rotate counterclockwise，Thus drive the second limiting plate 22 on manipulation plate 7 to rotate counterclockwise，When returning to initial position，Spring 8 recovers to first dress state，Second founds turning arm 21 by the stop stop motion of the first limiting plate 23 on location-plate 4，Manipulation plate 7 returns to neutral position，Thus realize in automatic time of pump.
When manipulation plate 7 rotates counterclockwise to certain angle, the right locating surface 16 on hole, manipulation plate 7 second location, by the stop of bolt 6, stops manipulation plate 7 to continue to rotate；When manipulation plate 7 is rotated clockwise to certain angle, the left locating surface 17 on hole, manipulation plate 7 second location, by the stop of bolt 6, stops manipulation plate 7 to continue to rotate.
Above-mentioned detailed description of the invention is only the concrete case of the present invention, is not the restriction that the present invention makees other form, and any those skilled in the art are changed possibly also with the technology contents of the disclosure above or are modified as the equivalent implementations of equivalent variations.But every without departing from the technology of the present invention principle on the premise of, any simple modification, equivalent variations and remodeling embodiment of above made according to the technical spirit of the present invention, all should fall into the scope of patent protection of the present invention.
Claims (6)
1. the return to neutral mechanism for plate variable plunger pump, plate variable plunger pump includes pump case (1) and rotating shaft (2), rotating shaft (2) is connected with the swash plate of plate variable plunger pump, rotating shaft (2) includes cylindrical shaft part and square shaft portion, it is characterised in that return to neutral mechanism includes:
Location-plate (4), is connected or integrally formed therewith with the cylindrical shaft part of rotating shaft (2), and side has the first limiting plate (23)；
Manipulation plate (7), is connected or integrally formed therewith with rotating shaft (2) square shaft portion, and side has the second limiting plate (22)；
First tensioning plate (10), has the first oblique turning arm (20) and first and founds turning arm (24)；
Second tensioning plate (11), has the second oblique turning arm (19) and second and founds turning arm (21)；With
Spring (8), two ends connect the first oblique turning arm (20) and the second oblique turning arm (19) respectively；
Wherein first found turning arm (24) and second and found turning arm (21) and lay respectively at the first limiting plate (23) and the second limiting plate (22) both sides, location-plate (4) and manipulation plate (7) are detachably connected as a whole with pump case (1), and the first tensioning plate (10) and the second tensioning plate (11) are detachably connected as a whole with rotating shaft (2) square shaft portion；When manipulate plate (7) drive first stand turning arm (24) or second stand turning arm (21) rotate time, spring (8) is stretched；When spring (8) shrinks, the first oblique turning arm (20) or the second oblique turning arm (19) rotate round about, make manipulation plate (7) be in neutral position.
The most according to claim 1 for the return to neutral mechanism of plate variable plunger pump, it is characterized in that: there is on location-plate (4) the first hole, location, in manipulation plate (7), there is the second hole, location (25), bolt (6) is connected with pump case through the first hole, location with the second hole, location (25), and bolt (6) axis is parallel with rotating shaft (2) axis.
The most according to claim 1 for the return to neutral mechanism of plate variable plunger pump, it is characterized in that: it also includes connection assembly, connect assembly and include hold-down bolt (15), pad (14) and axle sleeve (13), axle sleeve (13) one end has the square hole coordinated with square shaft portion, the other end has internal thread hole, hold-down bolt (15) sequentially passes through pad (14), the first tensioning plate (10) and the second tensioning plate (11) and is connected with axle sleeve (13), and hold-down bolt (15) axis and rotating shaft (2) axis are on same straight line.
The most according to claim 1 for the return to neutral mechanism of plate variable plunger pump, it is characterized in that: between the cylindrical shaft part of location-plate (4) and rotating shaft (2), between location-plate (4) and manipulation plate (7), between the first tensioning plate (10) and manipulation plate (7), between the second tensioning plate (11) and axle sleeve, it is respectively arranged with nylon jacket, nylon jacket has the aperture for storing lubricating oil.
The most according to claim 2 for the return to neutral mechanism of plate variable plunger pump, it is characterised in that: the second hole, location includes left locating surface (17) and right locating surface (16).
6. according to the return to neutral mechanism being used for plate variable plunger pump described in any one of claim 1 to 5, it is characterised in that: have bracing wire hole (18) on manipulation plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320092.0A CN105863981A (en) | 2016-05-16 | 2016-05-16 | Neutral position return mechanism used for swash plate type variable plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320092.0A CN105863981A (en) | 2016-05-16 | 2016-05-16 | Neutral position return mechanism used for swash plate type variable plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105863981A true CN105863981A (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610320092.0A Pending CN105863981A (en) | 2016-05-16 | 2016-05-16 | Neutral position return mechanism used for swash plate type variable plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863981A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6487857B1 (en) * | 2001-02-20 | 2002-12-03 | Hydro-Gear Limited Partnership | Zero-turn transaxle with mounted return to neutral mechanism |
| CN1576578A (en) * | 2003-07-24 | 2005-02-09 | 伊顿公司 | Swashplate holddown and adjustable centering mechanism |
| CN101512147A (en) * | 2006-09-01 | 2009-08-19 | 克拉克设备公司 | Two bolt adjustable centering system |
| CN101678762A (en) * | 2007-05-01 | 2010-03-24 | 怀特驱动产品有限公司 | Return to neutral mechanism for hydraulic pump |
| CN102439307A (en) * | 2010-03-18 | 2012-05-02 | 怀特(中国)驱动产品有限公司 | Return to neutral mechanism for hydraulic pump |
| CN205779519U (en) * | 2016-05-16 | 2016-12-07 | 山东省农业机械科学研究院 | Return to neutral mechanism for plate variable plunger pump |
-
2016
- 2016-05-16 CN CN201610320092.0A patent/CN105863981A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6487857B1 (en) * | 2001-02-20 | 2002-12-03 | Hydro-Gear Limited Partnership | Zero-turn transaxle with mounted return to neutral mechanism |
| CN1576578A (en) * | 2003-07-24 | 2005-02-09 | 伊顿公司 | Swashplate holddown and adjustable centering mechanism |
| CN101512147A (en) * | 2006-09-01 | 2009-08-19 | 克拉克设备公司 | Two bolt adjustable centering system |
| CN101678762A (en) * | 2007-05-01 | 2010-03-24 | 怀特驱动产品有限公司 | Return to neutral mechanism for hydraulic pump |
| CN102439307A (en) * | 2010-03-18 | 2012-05-02 | 怀特(中国)驱动产品有限公司 | Return to neutral mechanism for hydraulic pump |
| CN205779519U (en) * | 2016-05-16 | 2016-12-07 | 山东省农业机械科学研究院 | Return to neutral mechanism for plate variable plunger pump |
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| PB01 | Publication | ||
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Application publication date: 20160817 |