CN204402778U - A kind of axial plunger type hydraulic pump - Google Patents
A kind of axial plunger type hydraulic pump Download PDFInfo
- Publication number
- CN204402778U CN204402778U CN201420756143.0U CN201420756143U CN204402778U CN 204402778 U CN204402778 U CN 204402778U CN 201420756143 U CN201420756143 U CN 201420756143U CN 204402778 U CN204402778 U CN 204402778U
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- commutation
- hole
- valve body
- spool
- groove
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Abstract
The utility model discloses a kind of axial plunger type hydraulic pump, comprise the pump housing, be provided with in the pump housing swash plate, rotor and and plunger assembly, plunger assembly leans on swash plate by piston shoes; Also comprise the hydraulic commutator for controlling swash plate angle of inclination, hydraulic commutator comprises hydraulicdirectional control valve and driven valve; Hydraulicdirectional control valve, comprises commutation valve body, and the two ends of commutation valve body are respectively equipped with commutation valve gap, commutation slide bar is provided with between two commutation valve gaps, commutation slide bar is equiped with piston with its sliding fiting sleeve, the two ends end face of piston is respectively equipped with cavity, in cavity, is provided with commutation reset unit; Commutation reset unit comprise be slidably matched be sleeved on commutation slide bar and with contact bottom cavity coordinate in slide with to be sleeved on the slide bar that commutates and the outer slide be slidably matched with cavity, the Returnning spring be sleeved on commutation slide bar is provided with between interior slide and outer slide, commutation slide bar is provided with outer groove, is provided with the outer shroud collar for spacing outer slide in outer groove.
Description
Technical field
The utility model belongs to oil hydraulic pump technical field, is specifically related to a kind of axial plunger type hydraulic pump.
Background technique
In hydraulic system, the mechanical energy of electronic motivation, as energy conversion component, is converted to the pressure energy of fluid by oil hydraulic pump, for hydraulic system provides the liquid with certain pressure and flow.Can oil hydraulic pump be mentioned regulating can be divided into metering pump and variable displacement pump by being inputted (or output) fluid within the unit time, and axial plunger type hydraulic pump just belongs to the one in variable displacement pump.In existing axial plunger type hydraulic pump, adjust flux is carried out at angle of inclination generally by changing swash plate, and the angle of inclination of swash plate generally adopts manual servovalve to regulate, although can meet usage requirement to a certain extent, but there is manually-operable complexity, the defect that control accuracy is not high.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of axial plunger type hydraulic pump, can control the angle of inclination of swash plate easily, and have easy to operate, reliability is high and sensitive advantage.
For achieving the above object, the utility model provides following technological scheme:
A kind of axial plunger type hydraulic pump, comprise the pump housing, be provided with swash plate, rotor and the plunger assembly with described rotor synchronous axial system in the described pump housing, described plunger assembly leans on swash plate by piston shoes; Also comprise the hydraulic commutator for controlling described swash plate angle of inclination,
Described hydraulic commutator comprises hydraulicdirectional control valve and driven valve;
Described hydraulicdirectional control valve comprises commutation valve body, the two ends of described commutation valve body are respectively equipped with commutation valve gap, the piston cavity that between described commutation valve body and commutation valve gap, formation one is airtight, commutation slide bar is provided with between two described commutation valve gaps, described commutation slide bar is equiped with piston with its sliding fiting sleeve, the two ends end face of described piston is respectively equipped with cavity, in described cavity, is provided with commutation reset unit;
Described commutation reset unit comprise be slidably matched be sleeved on described commutation slide bar and with contact bottom described cavity coordinate in slide and being sleeved on described commutation slide bar and the outer slide be slidably matched with described cavity, the Returnning spring be sleeved on described commutation slide bar is provided with between described interior slide and outer slide, described commutation slide bar is provided with outer groove, is provided with the outer shroud collar for spacing described outer slide in described outer groove;
The middle part of described piston is provided with bearing pin, correspondingly with described bearing pin on described commutation valve body is provided with resigning hole, and described bearing pin is connected with described swash plate;
Described driven valve comprises the valve body be fixedly mounted on described commutation valve body, is provided with spool chamber in described valve body, is provided with inner spool and outer spool in described spool chamber, and described outer valve core housing is contained on described inner spool; Described spool chamber inwall is provided with an oil inlet hole, a spill port and two oil outlets be connected with the two ends of described piston cavity respectively, the axis of described oil inlet hole and the dead in line of described spill port, the axis of two described oil outlets overlap and with the axes normal of described oil inlet hole; Correspondingly with described oil inlet hole respectively on described outer spool be provided with oil-feed through hole, be provided with oil return through-hole with described spill port is corresponding and is provided with out oil hole with described oil outlet is corresponding, on the periphery wall of described inner spool, described oil outlet one_to_one corresponding is provided with two grooves with two, the bottom surface of two described grooves is parallel to each other, and the beeline between two described grooves is less than the internal diameter of described oil-feed through hole and oil return through-hole; The resetting-mechanism be also provided with the rotating and limiting mechanism for limiting described inner spool slewing area between described valve body and described inner spool, resetting for described inner spool and for driving the feedback mechanism of described outer valve core rotation.
Further, in described cavity, being provided with inner groove, being provided with in described inner groove for preventing described outer slide from skidding off inner ring collar outside described cavity.
Further, the two ends of described piston are provided with wear ring and axle Glais ring respectively and between described commutation valve body.
Further, the middle part of described commutation valve body is provided with pendulum pin through hole, on described piston corresponding with described through hole be provided with to put sell groove.
Further, described feedback mechanism comprises and being arranged in described valve body and the pin-and-hole of axis and described spool chamber axis being parallel, locating stud is provided with in described pin-and-hole, on described locating stud, cover is equiped with pendulum pin, in described valve body and described put to sell to coordinate be provided with pendulum cotter way, described outer spool is provided with puts with described the pendulum pin-and-hole sold and coordinate, and one end of described pendulum pin coordinates with described pendulum pin-and-hole, and the other end of described pendulum pin is sold through hole through described pendulum and stretched in described pendulum pin groove.
Further, the center of described through hole and resigning hole is all positioned on the symmetry plane of described commutation valve body, and the symmetry plane of described groove overlaps with the symmetry plane of described piston, and the axis of described bearing pin is positioned on the symmetry plane of described piston.
Further, described locating stud is provided with eccentric segment, and described pendulum guide is contained on described eccentric segment, and described locating stud is threaded connection structure installment in described pin-and-hole; Described locating stud is provided with locking nut.
Further, described rotating and limiting mechanism comprises and being sleeved on described inner spool and the gland be fixedly mounted on described valve body, described inner spool be provided with collar and between described collar and described gland and with the pressing plate of described inner spool synchronous axial system, described gland is provided with restraining groove towards the side of described pressing plate, and described pressing plate is positioned at described restraining groove.
Further, described resetting-mechanism comprises and being arranged in described valve body and the mounting hole of axis and described spool chamber axes normal, described mounting hole communicates with described spool chamber, be provided with plug screw and one end in described mounting hole and stretch into bayonet lock in described spool chamber, between described plug screw and described bayonet lock, be provided with spring; Described outer spool is provided with the slot to make way I for described bayonet lock of stepping down, and described inner spool is provided with the draw-in groove coordinated with described bayonet lock, and described bayonet lock is fixed in described draw-in groove by described spring compression.
Further, the bottom land of described groove is provided with the groove extended along its length.
The beneficial effects of the utility model are:
Axial plunger type hydraulic pump of the present utility model, by arranging hydraulic commutator, during use, rotate the inner spool of driven valve, one of them groove be arranged on inner spool can be made to be communicated with one of them oil outlet with oil inlet hole respectively, another groove is communicated with another oil outlet respectively at spill port, so, the high pressure liquid force feed that just can control one of them oil outlet is injected into one end of piston cavity, driven plunger is slided in piston cavity, and then utilize piston actuated swash plate to rotate, realize the object regulating swash plate angle of inclination; By arranging commutation slide bar and arranging commutation reset unit at the two ends of piston, when piston is along commutation valve body and commutation sliding bar, the Returnning spring of one of them commutation reset unit is stretched, the Returnning spring of another commutation reset unit is compressed, so, when high pressure liquid force feed is blocked, utilize the elastic force effect of Returnning spring can realize piston reset rapidly, and need not need to be resetted by the pressure effect driven plunger of hydraulic oil as existing selector valve, be quick on the draw, reliability is high.
By arranging feedback mechanism, when piston slides in piston cavity, movable pendulum pin can be with to rotate, pendulum pin drives outer valve core rotation, now, even if inner spool resets, also can guarantee that the mode of communicating on crude oil road can continual communication, namely, when operating, rotation inner spool is only needed can to ensure the continual communication of oil circuit, simple to operate.
Accompanying drawing explanation
In order to make the purpose of this utility model, technological scheme and beneficial effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is the structural representation of axial plunger type hydraulic pump embodiment of the present utility model;
Fig. 2 is the structural representation of hydraulicdirectional control valve;
Fig. 3 is the structural representation of driven valve;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the B-B sectional view of Fig. 3;
Fig. 6 is the stereogram of the present embodiment driven valve;
Fig. 7 is the structural representation of inner spool;
Fig. 8 is the structural representation of outer spool;
Fig. 9 is the structural representation of locating stud.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, and to make those skilled in the art better can understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As shown in Figure 1, be the structural representation of axial plunger type hydraulic pump embodiment of the present utility model.The axial plunger type hydraulic pump of the present embodiment, comprises the pump housing 200, and be provided with swash plate 201, rotor 202 and the plunger assembly 203 with rotor 202 synchronous axial system in the pump housing 200, plunger assembly 203 is leaned on swash plate 201 by piston shoes 204.The axial plunger type hydraulic pump of the present embodiment also comprises the hydraulic commutator for controlling swash plate 201 angle of inclination.
A kind of hydraulic commutator of the present embodiment comprises hydraulicdirectional control valve 205 and driven valve 206.
The hydraulicdirectional control valve of the present embodiment comprises commutation valve body 101, the two ends of commutation valve body 101 are respectively equipped with commutation valve gap 102, airtight piston cavity is formed between commutation valve body 101 and commutation valve gap 102, commutation slide bar 103 is provided with between two commutation valve gaps 102, commutation slide bar 103 is equiped with piston 104 with its sliding fiting sleeve, the two ends end face of piston 104 is respectively equipped with cavity 105, in cavity 105, is provided with commutation reset unit.The commutation reset unit of the present embodiment comprise be slidably matched be sleeved on commutation slide bar 103 and with contact bottom cavity 105 coordinate in slide 106 with to be sleeved on the slide bar 103 that commutates and the outer slide 107 be slidably matched with cavity 105, the Returnning spring 108 be sleeved on commutation slide bar 103 is provided with between interior slide 106 and outer slide 107, commutation slide bar 103 is provided with outer groove 109, is provided with the outer shroud collar 110 for spacing outer slide 107 in outer groove 109.The middle part of the piston 104 of the present embodiment is provided with bearing pin 117, and commutation valve body 101 correspondingly with bearing pin 117 is provided with resigning hole 118, and bearing pin 117 is connected with swash plate 201.
The driven valve of the present embodiment, comprises valve body 1, is provided with spool chamber in valve body 1, is provided with inner spool 2 and outer spool 3 in spool chamber, and outer spool 3 is sleeved on inner spool 2.Spool chamber inwall is provided with an oil inlet hole 4a, a spill port 4b and two oil outlet 4c, two oil outlets are connected with the two ends of piston cavity respectively, the axis of oil inlet hole 4a and the dead in line of spill port 4b, the axis of two oil outlet 4c overlap and with the axes normal of oil inlet hole 4a.Correspondingly with oil inlet hole 4a respectively on outer spool 3 be provided with oil-feed through hole 5a, be provided with oil return through-hole 5b with spill port 4b is corresponding and is provided with out oil hole 5c with oil outlet 4c is corresponding, the periphery wall of inner spool 2 is provided with two grooves 6 with two oil outlet 4c one_to_one corresponding, the bottom surface of two grooves 6 is parallel to each other, and the beeline between two grooves 6 is less than the internal diameter of oil-feed through hole 5a and oil return through-hole 5b.The resetting-mechanism be also provided with the rotating and limiting mechanism for limiting inner spool 2 slewing area between valve body 1 and inner spool 2, resetting for inner spool 2 and the feedback mechanism for driving outer spool 3 to rotate.The bottom land of the groove 6 of the present embodiment is provided with the groove extended along its length.
Being provided with inner groove 111 in the cavity 105 of the present embodiment, being provided with in inner groove 111 for preventing outer slide 107 from skidding off inner ring collar 112 outside cavity 105.The two ends of piston 104 are provided with wear ring 113 and axle Glais ring 114 respectively and between commutation valve body 101, can play seal action.
The middle part of the commutation valve body 101 of the present embodiment is provided with pendulum pin through hole, on piston 104 with pendulum sell through hole corresponding be provided with to put sell groove 116, the pendulum pin through hole of the present embodiment and the center of resigning hole 118 are all positioned on the symmetry plane of commutation valve body 101, the symmetry plane of pendulum pin groove 116 overlaps with the symmetry plane of piston 104, and the axis of bearing pin 117 is positioned on the symmetry plane of piston 104.
The feedback mechanism of the present embodiment comprises and being arranged in valve body 1 and the pin-and-hole 16 of axis and spool chamber axis being parallel, locating stud 17 is provided with in pin-and-hole 16, on locating stud 17, cover is equiped with pendulum pin 18, coordinate to be provided with pendulum pin 18 in valve body 1 and put cotter way 19, outer spool 3 is provided with and the pendulum pin-and-hole 20 put pin 18 and coordinate, one end of pendulum pin 18 coordinates with pendulum pin-and-hole 20, and the other end of pendulum pin 18 is through putting pin through hole and stretching in pendulum pin groove 116.The inner spool 2 of the present embodiment is provided with for the slot to make way II 21 prevented with put pin 18 and interfere.By arranging feedback mechanism, when the selector valve action of driven valve hydraulic control, the piston of hydraulicdirectional control valve can be with movable pendulum pin 18 to rotate, and drives outer spool 3 to rotate, and now, even if inner spool 2 resets, the oil circuit that also can realize crude oil connects effect, can reduce operation.
Further, the locating stud 17 of the present embodiment is provided with eccentric segment 22, pendulum guide 18 is contained on eccentric segment 22, and locating stud 17 is threaded connection structure installment in pin-and-hole 16, locating stud 17 is provided with locking nut 23, by arranging eccentric segment 22, the position location of pendulum pin 18 can be adjusted, namely can avoid interfering between pendulum pin 18 and inner spool 2.
The rotating and limiting mechanism of the present embodiment comprises and being sleeved on inner spool 2 and the gland 7 be fixedly mounted on valve body, inner spool be provided with collar 8 and between collar 8 and gland 7 and with the pressing plate 9 of inner spool 2 synchronous axial system, gland 7 is provided with restraining groove towards the side of pressing plate, pressing plate 9 is positioned at restraining groove, pressing plate 9 is in strip, when pressing plate 9 is along with inner spool 2 synchronous axial system, the sidewall of restraining groove carries out spacing to its rotation angle, prevents inner spool 2 from rotating excessive.
The resetting-mechanism of the present embodiment comprises and being arranged in valve body 1 and the mounting hole 10 of axis and spool chamber axes normal, mounting hole 10 communicates with spool chamber, be provided with plug screw 11 and one end in mounting hole 10 and stretch into bayonet lock 12 in spool chamber, between plug screw 11 and bayonet lock 12, be provided with spring 13.Outer spool 3 is provided with the slot to make way I 14 for bayonet lock 12 of stepping down, and inner spool 2 is provided with the draw-in groove 15 coordinated with bayonet lock 12, and bayonet lock 12 is pressed abd fixed in draw-in groove 15 by spring 13, utilizes the elastic force effect of spring, and inner spool 2 can be made to get back to initial position.
The above embodiment is only for absolutely proving the preferred embodiment that the utility model is lifted, and protection domain of the present utility model is not limited thereto.The equivalent alternative or conversion that those skilled in the art do on the utility model basis, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.
Claims (10)
1. an axial plunger type hydraulic pump, comprise the pump housing, be provided with swash plate, rotor and the plunger assembly with described rotor synchronous axial system in the described pump housing, described plunger assembly leans on swash plate by piston shoes, it is characterized in that: also comprise the hydraulic commutator for controlling described swash plate angle of inclination
Described hydraulic commutator comprises hydraulicdirectional control valve and driven valve;
Described hydraulicdirectional control valve comprises commutation valve body, the two ends of described commutation valve body are respectively equipped with commutation valve gap, the piston cavity that between described commutation valve body and commutation valve gap, formation one is airtight, commutation slide bar is provided with between two described commutation valve gaps, described commutation slide bar is equiped with piston with its sliding fiting sleeve, the two ends end face of described piston is respectively equipped with cavity, in described cavity, is provided with commutation reset unit;
Described commutation reset unit comprise be slidably matched be sleeved on described commutation slide bar and with contact bottom described cavity coordinate in slide and being sleeved on described commutation slide bar and the outer slide be slidably matched with described cavity, the Returnning spring be sleeved on described commutation slide bar is provided with between described interior slide and outer slide, described commutation slide bar is provided with outer groove, is provided with the outer shroud collar for spacing described outer slide in described outer groove;
The middle part of described piston is provided with bearing pin, correspondingly with described bearing pin on described commutation valve body is provided with resigning hole, and described bearing pin is connected with described swash plate;
Described driven valve comprises the valve body be fixedly mounted on described commutation valve body, is provided with spool chamber in described valve body, is provided with inner spool and outer spool in described spool chamber, and described outer valve core housing is contained on described inner spool; Described spool chamber inwall is provided with an oil inlet hole, a spill port and two oil outlets be connected with the two ends of described piston cavity respectively, the axis of described oil inlet hole and the dead in line of described spill port, the axis of two described oil outlets overlap and with the axes normal of described oil inlet hole; Correspondingly with described oil inlet hole respectively on described outer spool be provided with oil-feed through hole, be provided with oil return through-hole with described spill port is corresponding and is provided with out oil hole with described oil outlet is corresponding, on the periphery wall of described inner spool, described oil outlet one_to_one corresponding is provided with two grooves with two, the bottom surface of two described grooves is parallel to each other, and the beeline between two described grooves is less than the internal diameter of described oil-feed through hole and oil return through-hole; The resetting-mechanism be also provided with the rotating and limiting mechanism for limiting described inner spool slewing area between described valve body and described inner spool, resetting for described inner spool and for driving the feedback mechanism of described outer valve core rotation.
2. axial plunger type hydraulic pump according to claim 1, is characterized in that: be provided with inner groove in described cavity, is provided with for preventing described outer slide from skidding off inner ring collar outside described cavity in described inner groove.
3. axial plunger type hydraulic pump according to claim 1, is characterized in that: the two ends of described piston are provided with wear ring and axle Glais ring respectively and between described commutation valve body.
4. axial plunger type hydraulic pump according to claim 1, is characterized in that: the middle part of described commutation valve body is provided with pendulum pin through hole, on described piston corresponding with described through hole be provided with to put sell groove.
5. axial plunger type hydraulic pump according to claim 4, it is characterized in that: described feedback mechanism comprises and being arranged in described valve body and the pin-and-hole of axis and described spool chamber axis being parallel, locating stud is provided with in described pin-and-hole, on described locating stud, cover is equiped with pendulum pin, in described valve body and described put to sell to coordinate be provided with pendulum cotter way, described outer spool is provided with puts with described the pendulum pin-and-hole sold and coordinate, one end of described pendulum pin coordinates with described pendulum pin-and-hole, and the other end of described pendulum pin passes described pendulum pin through hole and stretches in described pendulum pin groove.
6. axial plunger type hydraulic pump according to claim 4, it is characterized in that: the center of described pendulum pin through hole and resigning hole is all positioned on the symmetry plane of described commutation valve body, the symmetry plane of described groove overlaps with the symmetry plane of described piston, and the axis of described bearing pin is positioned on the symmetry plane of described piston.
7. axial plunger type hydraulic pump according to claim 5, it is characterized in that: described locating stud is provided with eccentric segment, described pendulum guide is contained on described eccentric segment, and described locating stud is threaded connection structure installment in described pin-and-hole; Described locating stud is provided with locking nut.
8. axial plunger type hydraulic pump according to claim 1, it is characterized in that: described rotating and limiting mechanism comprises and being sleeved on described inner spool and the gland be fixedly mounted on described valve body, described inner spool be provided with collar and between described collar and described gland and with the pressing plate of described inner spool synchronous axial system, described gland is provided with restraining groove towards the side of described pressing plate, and described pressing plate is positioned at described restraining groove.
9. axial plunger type hydraulic pump according to claim 1, it is characterized in that: described resetting-mechanism comprises and being arranged in described valve body and the mounting hole of axis and described spool chamber axes normal, described mounting hole communicates with described spool chamber, be provided with plug screw and one end in described mounting hole and stretch into bayonet lock in described spool chamber, between described plug screw and described bayonet lock, be provided with spring; Described outer spool is provided with the slot to make way I for described bayonet lock of stepping down, and described inner spool is provided with the draw-in groove coordinated with described bayonet lock, and described bayonet lock is fixed in described draw-in groove by described spring compression.
10. axial plunger type hydraulic pump according to claim 1, is characterized in that: the bottom land of described groove is provided with the groove extended along its length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420756143.0U CN204402778U (en) | 2014-12-05 | 2014-12-05 | A kind of axial plunger type hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420756143.0U CN204402778U (en) | 2014-12-05 | 2014-12-05 | A kind of axial plunger type hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204402778U true CN204402778U (en) | 2015-06-17 |
Family
ID=53426644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420756143.0U Expired - Fee Related CN204402778U (en) | 2014-12-05 | 2014-12-05 | A kind of axial plunger type hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204402778U (en) |
-
2014
- 2014-12-05 CN CN201420756143.0U patent/CN204402778U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20151205 |
|
| EXPY | Termination of patent right or utility model |