CN204591605U - A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump - Google Patents

A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump Download PDF

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Publication number
CN204591605U
CN204591605U CN201520205088.0U CN201520205088U CN204591605U CN 204591605 U CN204591605 U CN 204591605U CN 201520205088 U CN201520205088 U CN 201520205088U CN 204591605 U CN204591605 U CN 204591605U
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CN
China
Prior art keywords
plunger
ball
groove
swash plate
hydraulic pump
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.)
Expired - Fee Related
Application number
CN201520205088.0U
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Chinese (zh)
Inventor
范淑琴
赵升吨
杨雪松
李省
李靖祥
曹苗
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Xian Jiaotong University
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Xian Jiaotong University
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Filing date
Publication date
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Priority to CN201520205088.0U priority Critical patent/CN204591605U/en
Application granted granted Critical
Publication of CN204591605U publication Critical patent/CN204591605U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump, comprise the plunger of cam-type axial piston oil hydraulic pump, plunger is arranged in the plunger cavity of rotor, and the end of plunger is provided with groove, and ball is contained in groove, the little firm ball of one deck is covered with between groove and ball, cover plate is connected by screw and plunger, and the another side of ball withstands in the groove of swash plate, and cam-type axial piston pump in the course of the work, be rolling friction between little firm ball and swash plate, frictional force is much smaller than sliding friction; Be directly installed in addition in the groove of plunger head, structure is less, the angle of inclination maximal regulated of swash plate can be made to 20 degree, thus improve the maximum pump discharge of cam-type axial piston oil hydraulic pump.

Description

A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump
Technical field
The utility model belongs to radial plunger hydraulic pump technical field, particularly a kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump.
Background technique
Hydraulics, as an importance of modern industrial technology, various industry equipment, running mechanism and boats and ships, aircraft is obtained for extensive use.In hydraulic system, the function of oil hydraulic pump is the pressure energy mechanical energy of motor or internal combustion engine prime movers being converted to liquid, provides pressure oil and drives executive component work, belong to Hydraulic power units to system.
Its centerline parallel of cam-type axial piston pump is in the axis of cylinder body.Cylinder body is uniformly distributed the plunger hole of these axially-aligned, plunger can move vertically in hole, the center line of swash plate and cylinder center line oblique angle.Swash plate and oil distribution casing maintain static.Plunger can be pressed on swash plate under low pressure or spring action.Cylinder body rotates a circle, and each plunger reciprocates once, completes an oil suction and force feed action.Change the angle of swash plate and cylinder center line, just can change the running length of plunger, thus can change pump delivery.Current plunger is connected by piston shoes with swash plate, and be sliding friction between piston shoes and swash plate, frictional force is larger, piston shoes serious wear, volume in addition due to piston shoes is comparatively large, such that the inclination angle of swash plate is maximum can only be adjusted to 15 degree, thus limits the maximum pump discharge of pump.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump, improves the maximum pump discharge of cam-type axial piston oil hydraulic pump.
In order to achieve the above object, the technical solution of the utility model is as follows:
A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump, comprise the plunger 2 of cam-type axial piston oil hydraulic pump, plunger 2 is arranged in the plunger cavity of rotor 3, one end of plunger 2 withstands on above swash plate 1, spring 6 is enclosed within transmission shaft 5, spring 6 one end withstands on rotor 3, the other end withstands on pressing plate 7, when plunger cavity oil suction, one end of plunger 2 is withstood on the surface of swash plate 1 by spring 6 by pressing plate 7, rotor 3 and thrust plate 4 are connected, rotor 3, thrust plate 4, swash plate 1 is arranged in pump case 9, first end lid 10 is provided with outside thrust plate 4, the second end cap 8 is provided with outside swash plate 1, first end cap 10, second end cap 8 is connected with pump case 9.
The end of described plunger 2 is provided with groove 2-1, and ball 2-2 is contained in groove 2-1, and between groove 2-1 and ball 2-2, be covered with one deck little firm ball 2-3, cover plate 2-5 be connected by screw 2-4 and plunger 2, the another side of ball 2-2 withstands in the groove on swash plate 1.
Advantage of the present utility model: cam-type axial piston pump in the course of the work, adopts little firm ball 2-3, ball 2-2 coordinates between plunger 2 and swash plate 1, be rolling friction between little firm ball 2-3 and swash plate 1, frictional force is much smaller than sliding friction; Be directly installed in addition in the groove of plunger head, structure is less, the angle of inclination maximal regulated of swash plate 1 can be made to 20 degree, thus improve the maximum pump discharge of cam-type axial piston oil hydraulic pump.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the three-view diagram of plunger 2 erection drawing, and wherein (a) is for plan view is along the sectional view of its median plane, and (b) is left view, and (c) is plan view.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
With reference to Fig. 1, a kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump, comprise the plunger 2 of cam-type axial piston oil hydraulic pump, plunger 2 is arranged in the plunger cavity of rotor 3, one end of plunger 2 withstands on above swash plate 1, spring 6 is enclosed within transmission shaft 5, spring 6 one end withstands on rotor 3, the other end withstands on pressing plate 7, when plunger cavity oil suction, one end of plunger 2 is withstood on the surface of swash plate 1 by spring 6 by pressing plate 7, rotor 3 and thrust plate 4 are connected, rotor 3, thrust plate 4, swash plate 1 is arranged in pump case 9, first end lid 10 is provided with outside thrust plate 4, the second end cap 8 is provided with outside swash plate 1, first end cap 10, second end cap 8 is connected with pump case 9.
With reference to Fig. 2, the end of described plunger 2 is provided with groove 2-1, ball 2-2 is contained in groove 2-1, the little firm ball 2-3 of one deck is covered with between groove 2-1 and ball 2-2, cover plate 2-5 is connected by screw 2-4 and plunger 2, prevent ball in movement process from coming off, the another side of ball 2-2 withstands in the groove on swash plate 1.
Working principle of the present utility model is:
When hydraulic pump works, plunger 2 is reciprocating in the plunger hole of rotor 3, realize the change of sealed volume, and plunger 2 is followed rotor 3 and moved in a circle, rotor 3 often circles, each plunger 2 makes a round trip, complete an oil suction and oil extraction process, hydraulic oil enters plunger hole in through thrust plate 4 inner passage when rotor 3 forwards upper half to by pump housing inlet port, after rotor 3 forwards lower half boosting to, discharge from the zone of high pressure of thrust plate 4 Lower Half through oil drain out, supply actuator.
In the groove 2-1 at plunger 2 top, one deck small ball 2-3 is covered with between ball 2-2 and plunger 2, thus make the friction that between ball 2-2 and plunger 2, relative movement produces be rolling friction, frictional force is very little, the another side of ball 2-2 withstands in the groove on swash plate 1, when plunger 2 rotates with rotor 3, ball 2-2 rolls in the surface groove of swash plate 1, thus reaches the effect reducing friction.

Claims (2)

1. one kind is applicable to the plunger head rolling structure without piston shoes of axial plunger hydraulic pump, comprise the plunger (2) of cam-type axial piston oil hydraulic pump, it is characterized in that: plunger (2) is arranged in the plunger cavity of rotor (3), one end of plunger (2) withstands on above swash plate (1), spring (6) is enclosed within transmission shaft (5), spring (6) one end withstands on rotor (3), the other end withstands on pressing plate (7), when plunger cavity oil suction, one end of plunger (2) is withstood on the surface of swash plate (1) by spring (6) by pressing plate (7), rotor (3) and thrust plate (4) are connected, rotor (3), thrust plate (4), swash plate (1) is arranged in pump case (9), first end lid (10) is provided with outside thrust plate (4), the second end cap (8) is provided with in swash plate (1) outside, first end cap (10), second end cap (8) is connected with pump case (9).
2. a kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump according to claim 1, it is characterized in that: the end of described plunger (2) is provided with groove (2-1), ball (2-2) is contained in groove (2-1), the little firm ball (2-3) of one deck is covered with between groove (2-1) and ball (2-2), cover plate (2-5) is connected by screw (2-4) and plunger (2), and the another side of ball (2-2) withstands in the groove on swash plate (1).
CN201520205088.0U 2015-04-07 2015-04-07 A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump Expired - Fee Related CN204591605U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520205088.0U CN204591605U (en) 2015-04-07 2015-04-07 A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520205088.0U CN204591605U (en) 2015-04-07 2015-04-07 A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump

Publications (1)

Publication Number Publication Date
CN204591605U true CN204591605U (en) 2015-08-26

Family

ID=53927766

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520205088.0U Expired - Fee Related CN204591605U (en) 2015-04-07 2015-04-07 A kind of plunger head rolling structure without piston shoes being applicable to axial plunger hydraulic pump

Country Status (1)

Country Link
CN (1) CN204591605U (en)

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150826

Termination date: 20170407

CF01 Termination of patent right due to non-payment of annual fee