CN203067204U - Swashplate type plunger pump and swashplate type plunger motor - Google Patents

Swashplate type plunger pump and swashplate type plunger motor Download PDF

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Publication number
CN203067204U
CN203067204U CN 201220582145 CN201220582145U CN203067204U CN 203067204 U CN203067204 U CN 203067204U CN 201220582145 CN201220582145 CN 201220582145 CN 201220582145 U CN201220582145 U CN 201220582145U CN 203067204 U CN203067204 U CN 203067204U
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CN
China
Prior art keywords
swash plate
plunger
cylinder
main shaft
motor
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Application number
CN 201220582145
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Chinese (zh)
Inventor
易小刚
唐省名
李�东
赵宇峰
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三一重工股份有限公司
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Priority to CN 201220582145 priority Critical patent/CN203067204U/en
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Publication of CN203067204U publication Critical patent/CN203067204U/en

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Abstract

The utility model provides a swashplate type plunger pump and a swashplate type plunger motor. The swashplate type plunger pump or the swashplate type plunger motor comprises a shell, a main shaft, a plurality of plunger assemblies, a swashplate, a cylinder, a valve plate and a connection component, wherein the connection component comprises a first component and a second component, the first component and the second component swing relatively, the first component is combined with the main shaft, the first component and the main shaft rotate synchronously, the swashplate is combined with the second component, and the swashplate and the second component rotate synchronously; and an inner cylindrical hole is formed in the center of the cylinder, the main shaft stretches into the inner cylindrical hole, the main shaft is matched with the inner cylindrical hole, and when the main shaft rotates, the cylinder rotates under the action of the plunger assemblies. According to the swashplate type plunger pump, the main shaft can be in clearance fit with the cylinder, and a transmission route relates to the main shaft, the connection component, the swashplate, the plunger assemblies and the cylinder. The swashplate type plunger pump and the swashplate type plunger motor have the advantages of being good in assembling performance, high in overall efficiency, small in lateral force, capable of achieving coaxial or through-shaft connection, and the like.

Description

A kind of swash plate plunger pump and motor

Technical field

The utility model relates to Hydraulic Field, specifically, relates to a kind of swash plate plunger pump and oblique tray type plunger motor.

Background technique

Oil hydraulic pump and oil hydraulic motor are very important energy conversion components in the hydraulic system, and oil hydraulic pump converts mechanical energy to the hydraulic pressure energy, and oil hydraulic motor can convert hydraulic pressure to mechanical energy, and both can switch mutually in theory, just have the part difference.Concise and to the point on illustrating, this paper emphasis is discussed the design of oil hydraulic pump, and the structure of oil hydraulic motor can be with reference to the description of oil hydraulic pump.

Plunger pump is wherein a kind of form of oil hydraulic pump.Plunger pump with its high pressure, at a high speed, plurality of advantages such as efficient and variable easy to control obtained in fields such as engineering machinery using widely.Different according to the layout of plunger and moving direction and transmission main shaft relative position, plunger pump can be divided into axial piston pump and radial plunger pump two classes.And axial piston pump is changed the mechanism according to its motion and can be divided into swash plate plunger pump (having another name called the direct shaft type axial piston pump) and bent axis type axial piston pump.

For swash plate plunger pump, its plunger axis is with the Boring mill line parallel or near parallel, and cylinder body axis and transmission dead in line.Be distributed on the piston shoes of the plunger assembly end in the cylinder body cylinder hole, owing to be subjected to the spacing of backhaul dish, be close on the inclined-plane of swash plate.When the prime mover driven transmission shaft rotates, drive the plunger group by cylinder body and rotate, while plunger group is because of the spacing relation on swash plate inclined-plane, and is reciprocating with respect to cylinder body, thereby realizes the operating mode of imbibition and hydraulic fluid.

Swash plate plunger pump has three pairs of main friction pairs: cylinder body and thrust plate, plunger and cylinder body cylinder hole, plunger piston slippery boots and swash plate.Because plunger piston slippery boots makes to also have tangential force and moment when plunger is bearing axial force in normal force suffered on the swash plate, this power and moment come balance for the active force of plunger by the rotor cylinder hole, and the sliding friction under this power and the moment loading will cause the reduction of mechanical efficiency and the wearing and tearing of parts.Cylinder body also makes central shaft produce amount of deflection because being subjected to the tilting moment effect.Therefore, mainly there is a following difficult problem in swash plate plunger pump: the one, and total efficiency is relatively low; The 2nd, relatively more responsive to oil contamination; The 3rd, allow rotating speed not high.

For bent axis type axial piston pump, its main shaft and cylinder body axis but in an angle, are compared following advantage with swash plate plunger pump not on same straight line: the one, and the lateral force that plunger bears is much smaller, thereby the frictional loss that lateral force causes is less; The 2nd, plunger or plunger connecting rod bulb and main shaft are connected firmly, and compare with swash plate plunger pump to have stronger suction capacity; The 3rd, inclined shaft pump main shaft does not need to pass thrust plate, makes that diameter of cylinder is corresponding to reduce, and leaks and frictional loss reduces.Therefore the overall efficiency of inclined shaft pump will be higher than swash plate pump, under equal technological level than the high 3%-4% of swash plate pump.

But bent axis type axial piston pump relies on cylinder body to swing to realize variable, needs bigger swing space, makes boundary dimension bigger; Bent axis type axial piston pump can not adopt the axle of perforation or the mode that diaxon is connected, thereby realizes relatively difficulty of duplex pump.

Problem at aforementioned swash plate plunger pump existence, application number is that 200780009019.0 Chinese patent file discloses a kind of axial piston pump or motor, this patent is in conjunction with the structural advantage of bent axis type axial piston pump, and apply it on the swash plate plunger pump, its cylinder body is by the main shaft driven rotary, main shaft rotates by constant-speed universal coupling driven rotary swash plate simultaneously, and the plunger assembly that is articulated on the wobbler is made axially reciprocating in plunger hole, realizes suction and the extrusion of fluid.

For this technological scheme, there are a plurality of assembling matching relationships, one is the spline fitted between main shaft and the Hooks coupling universal coupling, it two is spline fitted between main shaft and the cylinder body, it three is being sealed and matched between plunger and the plunger hole, and it four is cooperating between ball-and-socket and the plunger connecting rod bulb on the swash plate.Above matching relationship is more many, and then manufacture difficulty is more big.

Because cylinder body and swash plate are rotated by main shaft drives simultaneously, after being assembled to main shaft on by spline cylinder body, also need by spline Hooks coupling universal coupling and swash plate to be assembled on the main shaft, at this moment, it is very difficult that any one that guarantees a plurality of plunger assemblies all is assemblied between swash plate ball-and-socket and the plunger hole exactly, very harsh requirement has been proposed the manufacturing precision, when serious even can't assemble.And, even assembling is finished, problems such as assembly precision is low, plunger seal difference also may appear, oil liquid leakage and frictional loss are bigger, influence the overall efficiency of this swash plate plunger pump.

The model utility content

In view of this, the utility model aims to provide a kind of swash plate plunger pump or motor, and this plunger pump or motor can reduce assembling difficulty, improves assembly precision and overall efficiency.

Swash plate plunger pump of the present utility model or motor, comprise housing, be arranged at the main shaft on the described housing, a plurality of plunger assembly, the swash plate, the cylinder body that is provided with plunger hole that are connected with described plunger assembly first end, the thrust plate that is arranged at described cylinder ends rotationally, and comprise connected element, wherein:

Described connected element comprises first parts and second parts of relative swing, described first parts rotate synchronously in conjunction with described main shaft and with described main shaft, described swash plate rotates synchronously in conjunction with described second parts and with described second parts, and the rotation axis of described main shaft and the rotation axis of described swash plate are mutually angle;

The center of described cylinder body offers the cylindricality endoporus, and described main shaft stretches into described cylindricality endoporus, and forms between described main shaft and described cylindricality endoporus and cooperate, and when main shaft rotated, described cylinder body rotated under the drive of plunger assembly.

Further, first end of described plunger assembly is provided with bulb, and described swash plate is provided with ball-and-socket, and described bulb is arranged at and forms ball pivot in the ball-and-socket of described swash plate and connect, and also is provided with on the described swash plate for the backhaul dish spacing to described bulb.

Further, second end of described plunger assembly slides and is arranged in the plunger hole of described cylinder body, described plunger assembly comprises plunger rod, described plunger rod has cone structure, wherein, end away from described cylinder body is the small end of described cone structure, and an end of contiguous described cylinder body is the big end of described cone structure.

Further, also comprise balance and stroking mechanism, wherein:

Described balance is arranged on the described housing under the driving of described stroking mechanism swingably, and described swash plate connects described balance, when described balance is swung, and the corresponding adjustment of the angle of yaw of described swash plate.

Further, connect by swashplate bearing between described swash plate and the described balance, described swash plate is provided with boss, and described balance is provided with groove, and the inner ring of described swashplate bearing connects described boss, and the outer ring of described swashplate bearing connects described groove.

Further, described balance is supported on the described housing by two bearing pins, and swings centered by the axis of described two bearing pins, the whole gudgeon formula supporting structure that forms.

Further, described balance is connected on the described housing by the crescent moon bearing, and swings centered by the axis of described crescent moon bearing, the whole bracket type supporting structure that forms.

Further, described stroking mechanism is the variable piston, and described variable piston connects described balance, and described variable piston stretches out under the effect of hydraulic coupling and spring force respectively and withdraws.

Further, also comprise elastic element, described elastic element acts on the described cylinder body, is used for the end face of described cylinder body is pressed in described thrust plate.

Further, described connected element is ball pivot, and described first parts are the inner ring of described ball pivot, and described second parts are the outer ring of described ball pivot, connects for crowned spline between the inner ring of described ball pivot and the outer ring of described ball pivot.

Further, described first parts are for being provided with the inner ring of concave tracks at outer surface, described second parts are for being provided with the outer ring of concave tracks at internal surface, between the concave tracks of described first parts and second parts spin or slide block are installed, described spin or slide block move with the direction that departs from main-shaft axis in concave tracks.

Further, the formation that is combined as a whole between described first parts and the described main shaft, and/or the formation that is combined as a whole between described second parts and the described swash plate.

Further, described swash plate plunger pump or motor comprise at least 2 independently described housings, are provided with described a plurality of plunger assembly, swash plate, cylinder body, thrust plate, connected element in each housing, and a main shaft connects each housing.

The drive path of swash plate plunger pump of the present utility model is main shaft, connected element, swash plate, plunger assembly, cylinder body, drive in the cylinder body rotating process at plunger assembly, plunger assembly also moves back and forth in the plunger hole of cylinder body, thereby realize oil suction and press oily process, and then realize the conversion between mechanical energy and the hydraulic pressure energy.The working principle of oblique tray type plunger motor is reversible in aforementioned swash plate plunger pump.

Cylinder body of the present utility model center offers the cylindricality endoporus, forms the hole axle between this cylindricality endoporus and the main shaft and cooperates.For the spline fitted of prior art main shaft and cylinder body, reduced the assembling matching relationship, requirement to the machining accuracy of each parts reduces relatively, can more easily a plurality of plunger assemblies be assemblied between swash plate ball-and-socket and the plunger hole exactly, and can guarantee plunger seal and assembly precision, have assembling good, be easy to the advantage making and implement.

The utility model has adopted the structure of wobbler and ball pivot plunger, the structural advantages of bent axis type axial piston pump or motor is incorporated in the swash plate plunger pump of the present utility model, use the ball pivot plunger assembly to replace the plunger piston slippery boots of existing swash plate plunger pump or motor, and sliding friction become rolling friction, reduce frictional loss and oil liquid leakage, improved the total efficiency of pump or motor.

The friction pair of the utility model for forming between plunger and the plunger hole, the lateral force that its plunger bears is more much smaller than existing swash plate plunger pump or motor, thereby the frictional loss that lateral force causes is less, can reduce the requirement to the oil strain precision, make impact resistance, oil resistant dirt, limit speed and the life-span of pump or motor be improved.

The utility model is for bent axis type axial piston pump or motor, because the spatial structure compactness, and main shaft crosses in housing, and can be applied to need be with the occasion of shaft drive or axis transmission, such as duplex pump etc., thereby forms pump group or groups of motors structure.

In a word, the utility model has also guaranteed assembly precision and overall efficiency in the advantage of taking into account bent axis type axial piston pump or motor and direct shaft type plunger pump or motor, and the beneficial effects of the utility model are apparent.

Description of drawings

Fig. 1 is the utility model one embodiment's swash plate plunger pump or the structural representation of motor;

Fig. 2 is A-A sectional view embodiment illustrated in fig. 1;

Fig. 3 a is the structural representation of the utility model one embodiment's balance, swash plate and second parts part;

Fig. 3 b is the structural representation of the utility model one embodiment's first parts;

Fig. 4 a is the structural representation of another embodiment's of the utility model balance, swash plate and second parts part;

Fig. 4 b is the structural representation of another embodiment's of the utility model first parts;

Fig. 5 is another embodiment's of the utility model swash plate plunger pump or the structural representation of motor;

Fig. 6 is A-A sectional view embodiment illustrated in fig. 5.

Embodiment

In order more to be expressly understood above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments the utility model is further described in detail.

A lot of details have been set forth in the following description so that fully understand the utility model, but, the utility model can also adopt other to be different from other modes described here and implement, and therefore, the utility model is not limited to the restriction of following public specific embodiment.

Illustrated in figures 1 and 2 is the utility model one embodiment's swash plate plunger pump or the structural representation of motor, and this swash plate plunger pump or motor comprise housing 1, main shaft 2, plunger assembly 3, swash plate 4, cylinder body 5, thrust plate 6 and connected element 7 at least.

This housing 1 plays the skeleton function that supports other parts, and it can comprise front case and rear end cover 11, connects and form the housing structure of sealing between this front case and the rear end cover 11 by bolt.The split-type structural that it also can adopt front cover, middle casing and rear end cover 11 to form all can be realized technique effect of the present utility model.Housing 1 can cylinder iron be cast or alloy aluminum die casting forms.

Main shaft 2 is arranged on the housing 1 rotationally, and it can be supported on the housing 1 by fore bearing 21 and rear bearing 22, and can seal by Oil sealing assembly 23 between main shaft 2 and housing 1.When structure illustrated in figures 1 and 2 during as plunger pump, rotated by this main shaft 2 of prime mover driven; And when this structure during as piston motor, then drive swash plates 4 by plunger assembly 3 to rotate, and then drive main shaft 2 and rotate, the rotation of this main shaft 2 is as the output of mechanical energy.

Plunger assembly 3 comprises a plurality of, and its quantity can be 7,9 or other any possible number.First end of plunger assembly 3 connects swash plate 4, second end moves back and forth in the plunger hole of cylinder body 5.Each plunger assembly 3 can be parallel to each other, and the axis of plunger assembly 3 is parallel with main-shaft axis; In addition, also can be not parallel between each plunger assembly 3, can realize technique effect of the present utility model equally.

Plunger assembly 3 of the present utility model is preferably the ball pivot plunger assembly, and it also can be other structure.First end of this ball pivot plunger assembly 3 is provided with bulb, and swash plate 4 is provided with ball-and-socket, and bulb is arranged at and forms ball pivot in the ball-and-socket of swash plate 4 and connect.

This ball pivot plunger part is preferably monolithic construction, and its second end slides and is arranged in the plunger hole of cylinder body 5.As another mode of execution, this ball pivot plunger part can be split-type structural, comprise that two ends are provided with connecting rod and the plunger piece of bulb, one of them bulb is arranged in the ball-and-socket of swash plate 4 as first end of plunger assembly, another bulb is arranged in the endoporus of plunger piece, the plunger piece is arranged in the plunger hole of cylinder body 5, and plunger piece and connecting rod move back and forth with respect to cylinder body 5 together.

Preferred plunger assembly 3 comprises plunger rod, this plunger rod has cone structure, wherein, is the small end of described cone structure away from an end of described cylinder body 5, one end of contiguous described cylinder body 5 is the big end (with reference to figure 5 and Fig. 6) of described cone structure, rotates so that plunger assembly 3 drives cylinder body 5.

Further, can also plunger assembly 3 axially offer oilhole, oilhole is communicated with the hydraulic oil end of the plunger hole of the ball-and-socket of swash plate 4 and cylinder body 5, pressure oil can be introduced the ball-and-socket of swash plate 4 so that it is lubricated by this oilhole.

As previously mentioned, can be provided with ball-and-socket on the swash plate 4 of the present utility model, the quantity of this ball-and-socket is consistent with the quantity of plunger assembly 3, and ball-and-socket is uniformly distributed on the swash plate 4, and the line of ball-and-socket central point can form a disc.In addition, also need be provided with for the backhaul dish 41 spacing to bulb by swash plate 4.The bulb of first end of ball pivot plunger assembly 3 embeds the ball-and-socket of swash plate 4, and by backhaul dish 41 bulb is limited in the ball-and-socket.This swash plate 4 need have certain inclination, namely is mutually angle (angle of yaw) between the axis of the axis of this swash plate 4 and main shaft 2.For quantitative plunger pump or motor, the angle of yaw of this swash plate 4 is fixed; And for Variable plunger pump or motor, the angle of yaw of this swash plate 4 can be adjusted.In addition, this swash plate 4 is provided with through hole, so that main shaft 2 passes through and the installation of connected element 7.

Cylinder body 5 is provided with plunger hole, and the quantity of this plunger hole is consistent with the quantity of plunger assembly 3.Cylinder body 5 can be cylindrical structure, also can be conical structure, and the utility model is not limited to this.Plunger assembly 3 to-and-fro motion in plunger hole needs between them to form movingly closely, reveals to prevent fluid.Be provided with thrust plate 6 in the end of cylinder body 5, this thrust plate 6 distributes hydraulic oil to the plunger hole of each cylinder body 5, and the effect of playing its oil-feed of control and going out oil condition.

There are two pairs of friction pairs at this cylinder body 5: plunger assembly 3 and plunger hole, cylinder body 5 and thrust plate 6.Can carry out Wear-resistant Treatment at the corresponding rubbing surface of cylinder body 5, as nested or coating.Further, the utility model can arrange spherical concave surface at the end face of cylinder body 5, at the end face of thrust plate 6 spherical convex surface is set, and sphere cooperates between cylinder body 5 and the thrust plate 6, and this sphere is joined and had good Self-centering Action.Should be understood that, also can be that the plane cooperates between cylinder body 5 ends and the thrust plate 6, is beneficial to manufacturing.

In order to guarantee the reliable sealing between cylinder body 5 and the thrust plate 6, the utility model can also comprise elastic element 9, and elastic element 9 acts on the cylinder body 5, is used for the end face of cylinder body 5 is pressed in thrust plate 6.This elastic element 9 can be butterfly or spirality stage clip.

In addition, offer the cylindricality endoporus at the center of cylinder body 5, main shaft 2 stretches into the cylindricality endoporus, and forms between main shaft 2 and cylindricality endoporus and cooperate, and cylinder body 5 rotates under the drive of plunger assembly 3.This cooperation can be Spielpassung, transition fit and interference fit, and preferred gap cooperates.Cooperate by the hole axle, cylinder body 5 can be supported on the main shaft 2.This cylindricality endoporus can be cylindrical bore, also can be circular cone cylindricality endoporus.

As swash plate plunger pump the time, main shaft 2 rotates under the driving of prime mover, and passes through the transmission of connected element 7, swash plate 4 and plunger assembly 3 successively, drives cylinder body 5 at last and rotates; And as the oblique tray type plunger motor time, plunger assembly 3 to-and-fro motion under the effect of hydraulic coupling, and drive swash plate 4 and cylinder body 5 rotates, the rotation of swash plate 4 is passed to main shaft 2 after the transmission of connected element 7, drive main shaft 2 at last and rotate.

Need to prove, except aforementioned cylindricality endoporus and plunger hole, can also be provided with other hole on this cylinder body 5, as mounting hole of being communicated with the cylindricality endoporus etc., the utility model is not limited to this.

Connected element 7 of the present utility model comprises first parts 71 and second parts 72 of relative swing, first parts 71 rotate synchronously in conjunction with main shaft 2 and with main shaft 2, swash plate 4 rotates synchronously in conjunction with second parts 72 and with second parts 72, and the rotation axis of the rotation axis of main shaft 2 and swash plate 4 is mutually angle.By the transmission of this connected element 7, main shaft 2 can be converted to the rotation of swash plate 4 on the swash plate axis in the rotation on the main-shaft axis.This connected element 7 can be multiple possible mechanism, as structures such as Hooks coupling universal couplings.

As a kind of mode of execution, shown in Fig. 3 a and Fig. 3 b, this connected element 7 can be ball pivot, and aforementioned first parts 71 are the inner ring of ball pivot, and aforementioned second parts 72 are the outer ring of ball pivot, connects for crowned spline between the inner ring of ball pivot and the outer ring of ball pivot.The inner ring of ball pivot can be combined by spline, flat key between main shaft 2, also can adopt integrally formed mode; Also can be combined by spline, flat key between swash plate 4 in the outer ring of ball pivot, or adopt integrally formed mode.

The outer surface integral body of the crowned spline on the ball pivot inner ring is spherical, and can be center tooth height, structure that two end teeth are low, but also the structure characteristic that transverse tooth thickness is big in the middle of can adopting, the two ends transverse tooth thickness is little, to avoid the interference problem in the relative swing process with the outer ring of inner ring.

As another kind of mode of execution, as shown in Figs. 4a and 4b, first parts 71 are for being provided with the inner ring of concave tracks 70 at outer surface, second parts 72 are for being provided with the outer ring of concave tracks 70 at internal surface, spin or slide block (not shown) are installed between the concave tracks 70 of first parts 71 and second parts 72, and spin or slide block roll or slide with the direction that departs from main-shaft axis in concave tracks 70.

Can transmit moment of torsion between main shaft 2 and the swash plate 4 by spin or slide block, in swash plate 4 rotating process, spin or slide block move back and forth in concave tracks 70, and the rotation path of the path of concave tracks 70 and swash plate 4 is complementary.

First parts 71 can be combined by spline, flat key between main shaft 2, also can adopt integrally formed mode; Second parts 72 also can be combined by spline, flat key between swash plate 4, or adopt integrally formed mode.

Further, the utility model embodiment illustrated in figures 1 and 2 can also realize the variable adjusting of swash plate plunger pump or motor, and correspondingly it also is provided with balance 8 and stroking mechanism 80.Wherein, this balance 8 is arranged on the housing 1 under the driving of stroking mechanism 80 swingably, and swash plate 4 connects balance 8, during balance 8 swings, and the corresponding adjustment of the angle of yaw of swash plate 4.

Need to prove that swash plate 4 rotates centered by the axis of second parts 72 of connected element 7, and balance 8 only carries out wobbling action, its oscillation center is perpendicular to main-shaft axis (perpendicular to paper direction shown in Figure 1).Therefore, when connecting between swash plate 4 and the balance 8, relatively rotate between swash plate 4 and the balance 8.Preferably connect by swashplate bearing 40 between swash plate 4 and balance 8, swash plate 4 is provided with boss, and balance 8 is provided with groove, and the inner ring of swashplate bearing 40 connects boss, and the outer ring of swashplate bearing 40 connects groove.This swashplate bearing 40 embeds in the groove of balance 8, and is sleeved on the boss of swash plate 4.As a kind of optional embodiment, the outer ring of swashplate bearing 40 and balance are 8 integrally formed, inner ring and swash plate 4 are integrally formed.This swashplate bearing 40 can be tapered roller bearing, thrust-bearing or various combination bearing, with bearing radial force and axial force.

Balance 8 can be connected on the housing 1 in many ways, and as a kind of mode of execution, shown in Fig. 2, Fig. 3 a and Fig. 4 a, balance 8 is supported on the housing 1 by two bearing pins 81, and swings centered by the axis of two bearing pins 81, the whole gudgeon formula supporting structure that forms.In orientation shown in Figure 1, the axis normal of two bearing pins 81 is in paper, and passes the center of connected element 7, so that the angle of yaw of balance 8 and swash plate 4 and connected element 7 are complementary.For the ease of the installation of bearing pin 81, bearing and gland can also correspondingly be set, this bearing pin 81 is sleeved on the inner ring of bearing, and the outer ring of bearing is installed on the housing 1, and by gland enclosing housing 1.

As another kind of mode of execution, as shown in Figure 5 and Figure 6, balance 8 is connected on the housing 1 by crescent moon bearing 82, and swings centered by the axis of crescent moon bearing 82, the whole bracket type supporting structure that forms.Similarly, in orientation shown in Figure 5, the axis normal of crescent moon bearing 82 is in paper, and passes the center of connected element 7, so that the angle of yaw of balance 8 and swash plate 4 and connected element 7 are complementary.

Aforementioned stroking mechanism 80 can be multiple possible parts, as rotating gudgeon or variable piston etc.Fig. 1 and stroking mechanism 80 shown in Figure 5 are the variable piston, and this variable piston connects balance 8, and the variable piston stretches out under the effect of hydraulic coupling and spring force respectively and withdraws.As a kind of mode of execution, during oil-feed, piston stretches out under action of hydraulic force in cavity; And in cavity during oil return, piston is withdrawn under action of hydraulic force and is resetted.Need to prove that the utility model can also be connected with two variable pistons at balance 8, as Fig. 1 and shown in Figure 5, the variable piston is installed in two positions up and down respectively, when regulating balance 8 angle of yaw, and two variable pistons concerted action up and down, when one of them stretches out, another withdrawal.

As another by way of example, the utility model comprises at least 2 independently housings 1, is provided with a plurality of plunger assemblies 3, swash plate 4, cylinder body 5, thrust plate 6, connected element 7 in each housing 1, and the each several part annexation is described with reference to preamble.A main shaft 2 connects each housing 1, thereby forms duplex, multiplex pump or motor, has advantages such as spatial structure compactness.

In the structure of previous embodiment of the present utility model during as swash plate plunger pump, under prime mover effect, drive main spindle 2 is rotated centered by its horizontal axis, and drive comprises that the connected element 7 of first parts 71 and second parts 72 rotates, first parts 71 rotate centered by its horizontal axis, second parts 72 rotate centered by its tilt axis, second parts 72 drive swash plate 4 and rotate centered by tilt axis, thereby make plunger assembly 3 in the plunger hole of cylinder body 5, move back and forth, form the volume-variation of hydraulic oil in the cylinder body 5, realize oil suction and press the process of oil, so realize from the mechanical energy of prime mover to plunger pump hydraulic pressure can conversion.In aforementioned process, because piston shoes are not set, plunger assembly 3 drives cylinder body 5 and rotates centered by horizontal axis, and whole drive path is: prime mover → first parts, 71 → the second parts, 72 → swash plate, 4 → plunger assembly, 3 → cylinder body 5.

In the structure of previous embodiment of the present utility model during as the oblique tray type plunger motor, plunger assembly 3 to-and-fro motion under the effect of hydraulic coupling, and drive swash plate 4 and cylinder body 5 rotates, the rotation of swash plate 4 is passed to main shaft 2 after the transmission of connected element 7, drive at last that main shaft 2 rotates and output, and then realize can be to the conversion of the mechanical energy of piston motor from hydraulic pressure.

Because oil hydraulic pump and oil hydraulic motor can switch in theory mutually, just have the part difference.For structure and the working principle of oblique tray type plunger motor of the present utility model, can be with reference to the explanation of the plunger pump of this paper.As long as adopted the hydraulic pressure installation of the utility model aforementioned structure, no matter be swash plate plunger pump and piston motor, all within protection domain of the present utility model.

Compare with the inclined disc type or bent axis type axial piston pump of prior art, the beneficial effects of the utility model are apparent, can comprise at least following some:

1) assembling is good

Cylinder body of the present utility model 5 centers offer the cylindricality endoporus, form the hole axle between this cylindricality endoporus and the main shaft 2 and cooperate.For the spline fitted of prior art main shaft 2 and cylinder body 5, reduced the assembling matching relationship, requirement to the machining accuracy of each parts reduces relatively, can more easily a plurality of plunger assemblies 3 be assemblied between swash plate 4 ball-and-sockets and the plunger hole exactly, and can guarantee plunger seal and assembly precision, have assembling good, be easy to the advantage making and implement.

2) total efficiency height

The utility model has adopted the structure of wobbler 4 and ball pivot plunger, the structural advantages of bent axis type axial piston pump or motor is incorporated in the swash plate plunger pump of the present utility model, use ball pivot plunger assembly 3 to replace the plunger piston slippery boots of existing swash plate plunger pump or motor, and sliding friction become rolling friction, reduce frictional loss and oil liquid leakage, improved the total efficiency of pump or motor.

3) lateral force is little

The friction pair of the utility model for forming between plunger and the plunger hole, the lateral force that its plunger bears is more much smaller than existing swash plate plunger pump or motor, thereby the frictional loss that lateral force causes is less, can reduce the requirement to the oil strain precision, make impact resistance, oil resistant dirt, limit speed and the life-span of pump or motor be improved.

4) can realize coaxial or the axis connection

The utility model is for bent axis type axial piston pump or motor, because the spatial structure compactness, and main shaft 2 crosses in housing 1, and can be applied to need be with the occasion of shaft drive or axis transmission, such as duplex pump etc., thereby forms pump group or groups of motors structure.

The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (13)

1. a swash plate plunger pump or motor, comprise housing (1), the thrust plate (6) that is arranged at the main shaft (2) on the described housing (1), a plurality of plunger assembly (3), the swash plate (4), the cylinder body (5) that is provided with plunger hole that are connected with described plunger assembly (3) first ends rotationally, is arranged at described cylinder body (5) end, it is characterized in that, also comprise connected element (7), wherein:
Described connected element (7) comprises first parts (71) and second parts (72) of relative swing, described first parts (71) rotate synchronously in conjunction with described main shaft (2) and with described main shaft (2), described swash plate (4) rotates synchronously in conjunction with described second parts (72) and with described second parts (72), and the rotation axis of the rotation axis of described main shaft (2) and described swash plate (4) is mutually angle;
The center of described cylinder body (5) offers the cylindricality endoporus, described main shaft (2) stretches into described cylindricality endoporus, and between described main shaft (2) and described cylindricality endoporus, form and cooperate, when main shaft (2) rotated, described cylinder body (5) rotated under the drive of plunger assembly (3).
2. swash plate plunger pump according to claim 1 or motor, it is characterized in that, first end of described plunger assembly (3) is provided with bulb, described swash plate (4) is provided with ball-and-socket, described bulb is arranged at and forms ball pivot in the ball-and-socket of described swash plate (4) and connect, and also is provided with on the described swash plate (4) for the backhaul dish (41) spacing to described bulb.
3. swash plate plunger pump according to claim 2 or motor, it is characterized in that, second end of described plunger assembly (3) slides and is arranged in the plunger hole of described cylinder body (5), described plunger assembly (3) comprises plunger rod, described plunger rod has cone structure, wherein, be the small end of described cone structure away from an end of described cylinder body (5), an end of contiguous described cylinder body (5) is the big end of described cone structure.
4. swash plate plunger pump according to claim 1 or motor is characterized in that, also comprise balance (8) and stroking mechanism (80), wherein:
Described balance (8) is arranged on the described housing (1) under the driving of described stroking mechanism (80) swingably, and described swash plate (4) connects described balance (8), during described balance (8) swing, and the corresponding adjustment of angle of yaw of described swash plate (4).
5. swash plate plunger pump according to claim 4 or motor, it is characterized in that, connect by swashplate bearing (40) between described swash plate (4) and the described balance (8), described swash plate (4) is provided with boss, described balance (8) is provided with groove, the inner ring of described swashplate bearing (40) connects described boss, and the outer ring of described swashplate bearing (40) connects described groove.
6. swash plate plunger pump according to claim 4 or motor, it is characterized in that, described balance (8) is supported on the described housing (1) by two bearing pins (81), and swings centered by the axis of described two bearing pins (81), the whole gudgeon formula supporting structure that forms.
7. swash plate plunger pump according to claim 4 or motor, it is characterized in that, described balance (8) is connected on the described housing (1) by crescent moon bearing (82), and swings centered by the axis of described crescent moon bearing (82), the whole bracket type supporting structure that forms.
8. swash plate plunger pump according to claim 4 or motor, it is characterized in that, described stroking mechanism (80) is the variable piston, and described variable piston connects described balance (8), and described variable piston stretches out under the effect of hydraulic coupling and spring force respectively and withdraws.
9. according to claim 1-8 each described swash plate plunger pump or motor, it is characterized in that, also comprise elastic element (9), described elastic element (9) acts on the described cylinder body (5), is used for the end face of described cylinder body (5) is pressed in described thrust plate (6).
10. according to claim 1-8 each described swash plate plunger pump or motor, it is characterized in that, described connected element (7) is ball pivot, described first parts (71) are the inner ring of described ball pivot, described second parts (72) are the outer ring of described ball pivot, connect for crowned spline between the inner ring of described ball pivot and the outer ring of described ball pivot.
11. according to claim 1-8 each described swash plate plunger pump or motor, it is characterized in that, described first parts (71) are for being provided with the inner ring of concave tracks (70) at outer surface, described second parts (72) are for being provided with the outer ring of concave tracks (70) at internal surface, between the concave tracks (70) of described first parts (71) and second parts (72) spin or slide block are installed, described spin or slide block move with the direction that departs from main-shaft axis in concave tracks (70).
12. according to claim 1-8 each described swash plate plunger pump or motor, it is characterized in that, the formation that is combined as a whole between described first parts (71) and the described main shaft (2), and/or the formation that is combined as a whole between described second parts (72) and the described swash plate (4).
13. according to claim 1-8 each described swash plate plunger pump or motor, it is characterized in that, comprise at least 2 independently described housings (1), be provided with described a plurality of plunger assembly (3), swash plate (4), cylinder body (5), thrust plate (6), connected element (7) in each housing (1), a main shaft (2) connects each housing (1).
CN 201220582145 2012-11-07 2012-11-07 Swashplate type plunger pump and swashplate type plunger motor CN203067204U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926959A (en) * 2012-11-07 2013-02-13 三一重工股份有限公司 Swash plate type axial piston pump or motor
CN104533743A (en) * 2014-12-30 2015-04-22 南京萨伯工业设计研究院有限公司 Hydraulic pump bilateral pressure-bearing servo variable device and control method thereof
CN104948408A (en) * 2015-07-01 2015-09-30 张意 Variable axial plunger pump
CN105114278A (en) * 2015-07-24 2015-12-02 杭州绿聚科技有限公司 Novel axial plunger pump
CN106593851A (en) * 2017-01-10 2017-04-26 段俊荣 Inclined disc and axial plunger pump/motor adopting inclined disc
CN104454753B (en) * 2014-11-29 2017-06-13 桂林理工大学 Modified motor spindle component and its processing method
CN108425820A (en) * 2017-12-30 2018-08-21 徐秀芳 A kind of cam-type axial piston pump of included slippage pump
CN108884815A (en) * 2016-03-28 2018-11-23 株式会社神户制钢所 Hydraulic rotary machine
CN109416031A (en) * 2016-07-08 2019-03-01 Kyb株式会社 Swash plate plunger pump
WO2020182201A1 (en) * 2019-03-13 2020-09-17 青岛科而泰控股有限公司 Sliding disc supported non-through shaft plunger pump or motor
WO2020182206A1 (en) * 2019-03-13 2020-09-17 青岛科而泰控股有限公司 Tandem-type axial plunger pump

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926959A (en) * 2012-11-07 2013-02-13 三一重工股份有限公司 Swash plate type axial piston pump or motor
CN104454753B (en) * 2014-11-29 2017-06-13 桂林理工大学 Modified motor spindle component and its processing method
CN104533743A (en) * 2014-12-30 2015-04-22 南京萨伯工业设计研究院有限公司 Hydraulic pump bilateral pressure-bearing servo variable device and control method thereof
CN104948408A (en) * 2015-07-01 2015-09-30 张意 Variable axial plunger pump
CN104948408B (en) * 2015-07-01 2017-06-30 张意 A kind of axial variable displacement plunger pump
CN105114278A (en) * 2015-07-24 2015-12-02 杭州绿聚科技有限公司 Novel axial plunger pump
CN108884815B (en) * 2016-03-28 2020-06-09 株式会社神户制钢所 Hydraulic rotary machine
CN108884815A (en) * 2016-03-28 2018-11-23 株式会社神户制钢所 Hydraulic rotary machine
US10808686B2 (en) 2016-03-28 2020-10-20 Kobe Steel, Ltd. Hydraulic rotary machine
CN109416031A (en) * 2016-07-08 2019-03-01 Kyb株式会社 Swash plate plunger pump
CN109416031B (en) * 2016-07-08 2020-03-31 Kyb株式会社 Swash plate type plunger pump
CN106593851B (en) * 2017-01-10 2018-09-14 段俊荣 A kind of swash plate and the axial plunger pump/motor for using the swash plate
CN106593851A (en) * 2017-01-10 2017-04-26 段俊荣 Inclined disc and axial plunger pump/motor adopting inclined disc
CN108425820A (en) * 2017-12-30 2018-08-21 徐秀芳 A kind of cam-type axial piston pump of included slippage pump
WO2020182201A1 (en) * 2019-03-13 2020-09-17 青岛科而泰控股有限公司 Sliding disc supported non-through shaft plunger pump or motor
WO2020182206A1 (en) * 2019-03-13 2020-09-17 青岛科而泰控股有限公司 Tandem-type axial plunger pump

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