CN108131266B

CN108131266B - Fluid pump

Info

Publication number: CN108131266B
Application number: CN201810101727.7A
Authority: CN
Inventors: 李涌权
Original assignee: 李涌权
Current assignee: Shanghai Hai special Intelligent Technology Co., Ltd.
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2019-08-30
Anticipated expiration: 2038-02-01
Also published as: CN108131266A; WO2019148911A1

Abstract

The invention discloses a kind of fluid pumps, comprising: shell, the enclosure interior are formed with driving space；Swash plate, the swash plate are located at the driving space of the shell, and the state being kept fixed simultaneously has inclined surface；Cylinder block, the cylinder block are located at the driving space and are rotated by drive shaft, extend in internal multiple cylinder-bores and the drive shaft same direction；At least part of multiple piston components, the piston component is inserted in inside the cylinder-bore of cylinder block, carries out linear movement in the inside of the cylinder-bore while rotation with the cylinder block, one end has ball-and-socket joint；And discoid retainer, the retainer is in conjunction with swash plate and maintains to be in close contact the state in inclined surface, can rotate independently with swash plate, be connected with the ball-and-socket joint of the piston component, it is in close contact in the state of the inclined surface of swash plate by piston component, as the piston component rotates together.

Description

Fluid pump

Technical field

The present invention relates to a kind of fluid pump (fluid pump), and in particular to a kind of discoid holding being set on swash plate Device is independently rotated with swash plate, so that the piston connecting with retainer generates the stream of Fluid pressure (oil pressure or hydraulic pressure) Body pump.

Background technique

Common fluid pump, such as oil pressure pump utilize phase when rotating to the inclined swash plate in side (Swash Plate) to change The phenomenon that change.Its structure is simply observed it is found that passing through column by the piston that the linear movement in cylinder interior generates Fluid pressure Plug piston shoes are connect with retainer.Retainer plays the role of hanging plunger piston slippery boots, since retainer is adjacent with swash plate, as a result, Piston can be in close contact with swash plate.At this point, the retainer is connect using piston as medium with cylinder, so that the retainer It is rotated inside housings.

In these existing fluid pumps, retainer, therefore can inclining swash plate between swash plate and plunger piston slippery boots Slope driving pulls the strength of piston to pass to piston by retainer.For example, the piston for being located at cylinder interior passes through plunger Piston shoes are connect with retainer, therefore during retainer is rotated along the inclined surface of swash plate, may be kept device pulling.

However, due to not having the other structures that such retainer is immobilized in the shell to portion, retainer is revolving It can be tilted to multiple directions during turning.For example, retainer can be centered on other axis other than basic rotary shaft It is rolled and is spiraled simultaneously.Therefore, the abrasion of retainer is easy to happen in the use process of pump, there are asking for durability difference Topic.

In particular, applying to the interconnecting piece of retainer and plunger piston slippery boots biggish during piston is pulled out cylinder Load has that retainer is torn in the process.

In addition, since the connection structure between piston and swash plate is made of multiple components, there are number of components increase, The problem of assemblability is deteriorated.Consider the connection between piston and swash plate, need the assembling between retainer and plunger piston slippery boots and lives Assembling between plug and plunger piston slippery boots, assembling need accurate operation, this makes automation become difficult and further increase Manufacturing cost is added.

Existing technical literature

Patent document

Korean Patent Publication No. 10-2012-0126134

Korean Patent Publication No. 10-2006-0060168

Summary of the invention

Technical problem to be solved

The technical issues of present invention is to solve the above-mentioned prior art and complete, it is an object of the present invention to make to justify Disc-like holder is in close contact in rotating retainer in the case where maintaining certain angle.

It is another object of the present invention to insert the piston into retainer, retainer is made to play the work of plunger piston slippery boots With while, convenient for the assembling between piston and retainer.

The technological means of solution

Complete in order to achieve the above object it is a feature of the present invention that fluid pump of the invention includes: shell, the shell Internal portion is formed with driving space；Swash plate, the swash plate are located at the driving space of the shell, and the state being kept fixed and having is inclined Inclined-plane；Cylinder block, the cylinder block are located at the driving space and are rotated by drive shaft, in internal multiple cylinder-bores and drive The moving axis same direction extends；Multiple piston components, at least part of the piston component are inserted in the cylinder-bore of the cylinder block Inside carries out linear movement in the inside of the cylinder-bore while rotation with the cylinder block, and one end has ball And-socket joint；And discoid retainer, the retainer is in conjunction with swash plate and maintains to be in close contact the state in inclined surface, can with it is oblique Disk rotates independently, and is connected with the ball-and-socket joint of the piston component, is in close contact by piston component in the inclined surface of swash plate In the state of, as the piston component rotates together.

Further, the retainer is rotatably engaged by rotary joint in the central part of the swash plate, is had It is rotated in the case where certain inclination angle of inclined surface corresponding to the swash plate.

Further, the retainer is with certain thickness discoid, and central part is by the drive shaft, with embedding The centre bore for entering the rotary joint is formed with multiple keeper bore in a circumferential direction centered on the centre bore to be pressed into The ball-and-socket joint.

Further, the piston component includes: piston body, which is inserted in the cylinder-bore of the cylinder block；With And ball-and-socket joint, one end are pivotably coupled to towards the part on the outside of cylinder-bore in the piston body, the other end is connected to institute State retainer.

Further, the both ends of the ball-and-socket joint are respectively rotatably connected to piston body and the holding of piston component Device.

Further, one end of the ball-and-socket joint is pressed into the connector mounting hole for being assemblied in the piston body, the other end It is in close contact with the retainer is passed through in the ball of the inclined surface of the swash plate.

Further, the opposite side for the part for being combined with the ball-and-socket joint in the piston body is combined with presser unit, The presser unit pressurizes to fluid in the cylinder-bore of the cylinder block.

Technical effect

Fluid pump according to the present invention as described above has the effect that

In fluid pump of the invention, it is in close contact piston and is rotatably engaged in the retainer of swash plate in swash plate, because This is rotated in the case where being in close contact the rotation angle for remaining certain while the inclined surface of swash plate.Therefore, in pump In motion process, can prevent retainer by basic rotary shaft without other relevant rotary shafts centered on arbitrarily rotate or incline Tiltedly, it prevents the abrasion occurred during it and has the effect of improving durability.

Also, since retainer of the invention is rotated with the certain tilt angle for corresponding to the inclined surface of swash plate, Therefore the noise as caused by the shaking of retainer is reduced in the operating process of pump, can be realized retainer and connected to it The operating reliability of pump can be improved in the operating stably of piston.

In addition, in the present invention, when the ball-and-socket joint for being connected to piston is pressed into the keeper bore of retainer, realizes and live Assembling between plug and retainer.Therefore, it is convenient to omit complicated assembling process between retainer and plunger piston slippery boots, and can be with Reduce the number of components of retainer and plunger piston slippery boots.Thus have the effect of reducing the manufacturing cost of fluid pump.

Particularly, retainer is rotationally fixed on swash plate, therefore substantially can be with stable operation, so for keeping The stable operation of device and prevent manufacture/assembling allowable error of each component of abrasion from can become drop with relative increase The factor of the manufacturing expense of the low part.

In addition, in the present invention, retainer also has the function of sharing plunger piston slippery boots, so that the interval between piston be made to begin It keeps constant eventually, therefore also has the effect of more smooth and even running.

Detailed description of the invention

It should be understood by those skilled in the art that following explanation is only schematically to illustrate the principle of the present invention, the principle It can apply in many ways, to realize many different alternative embodiments.These explanations are only used for showing religion of the invention Lead the General Principle of content, it is not intended to which limitation is conceived in this disclosed invention.

It is incorporated in the present specification and forms part of this specification that accompanying drawing shows embodiment of the present invention, and And the principle for explaining the present invention together with the detailed description of general description and following drawings above.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

Fig. 1 is the perspective view for indicating the structure of an embodiment of fluid pump of the invention；

Fig. 2 is the decomposition perspective view that the component for the embodiment for being constituted Fig. 1 is shown with decomposing state；

Fig. 3 is to cut the perspective view of the state of a part to show the housing interior structure in the component for being shown in Fig. 2；

Fig. 4 is the sectional view intercepted along the I-I' line of Fig. 1；

Fig. 5 is illustrated in the decomposition perspective view that the structure of piston component is decomposed in the component of Fig. 2；

Fig. 6 is the perspective view for removing shell in Fig. 1 and showing internal structure.

Description of symbols in figure:

10 be first shell, and 11 be the main body of first shell,

12 be driving space,

13,13 ' be the first connectivity slot, the second connectivity slot,

14 be locking ring portion, and 15 be inner housing,

17 be lid, and 18 be external intercommunicating pore,

18a, 18c are first port, second port, and 18b is tap,

19 be first flange, and 19 ' be the first fastener hole,

30 be second shell, and 31 be second flange,

32 be the second fastener hole,

33 be first shaft hole, and 34 be matrix,

35 be swash plate, and 36 be inclined surface,

50 be cylinder block,

52 be the second axis hole, and 55 be cylinder-bore,

55a is piston portion, and 55b is fluid flow portion,

70 be piston component, and 71 be piston body,

72 be connector mounting hole, and 72 ' be assembling protrusion,

73 be ball-and-socket joint,

74 be ball, and 75 be Piston connecting portion,

76 be presser unit, and 77 be assembling grove,

80 be retainer, and 81 be disc body,

82 be keeper bore, and 83 be center hole,

88 be rotary joint, and 90 be drive shaft,

91 be shaft body, and 92 be drive connection portion,

93 be cylinder interconnecting piece.

Specific embodiment

In the following, some embodiments of the present invention are described in detail referring to illustrative figures.It should be noted that each When the constituent element of a attached drawing assigns appended drawing reference, for identical constituent element, even if showing in different drawings, also to the greatest extent Identical appended drawing reference may be made it have.In addition, in the explanation of the embodiment of the present invention, it is believed that relevant known features or When illustrating obstruction understanding of embodiments of the invention of function, is omitted its detailed description.

In the constituent element for illustrating the embodiment of the present invention, such as first can be used, second, A, B, (a's) and (b) Term.These terms are intended to distinguish constituent element and other constituent elements, these terms do not limit the property of constituent element, Sequence or sequence.When being described as certain constituent element " connection ", " in conjunction with " or it is " connected " to another constituent element when, constituent element It can be directly connected to or be connected to another constituent element, but be also understood that and " can also be connected " between each component or " phase Even " other constituent elements.

The present invention relates to drive shaft 90 is rotated by motor or engine etc., the rotary force of drive shaft 90 is turned The parallel motion of piston is changed to form the fluid pump of oil pressure or hydraulic pressure.Especially, in the present invention, swash plate 35 do not rotate and by Fixed, retainer 80 is relative to the independent rotation of swash plate 35 but to be rotatably fixed relative to swash plate 35.Thus make It obtains retainer 80 always to be rotated in a manner of the inclination angle for remaining certain, to prevent retainer 80 in rotary course Inclination is shaken.The specific structure of aforementioned present invention is illustrated as follows.

With reference to Fig. 1, frame of the invention is formed by shell 10,30.The shell 10,30 is generally cylindrical and at it Inside has driving space 12.The shell 10,30 is considered to be constituted by 2, in this embodiment, the shell 10, it 30 is made of first shell 10 and second shell 30.When first shell 10 and second shell 30 assembled with one another, shape wherein At the driving space 12 of sealing.Second shell 30 is considered a kind of lid.As can be seen that 10 He of first shell in Fig. 2 Second shell 30 is separated from each other.

As shown in figure 3, first shell 10 has driving space 12 on the inside of the main body 11 of first shell 10, in driving space 12 insides have connectivity slot.Connectivity slot is generally divided into two parts, and the connectivity slot can be divided into the first connection separated from each other Slot 13 and the second connectivity slot 13 '.First connectivity slot 13 and the second connectivity slot 13 ' are connected to the piston component 70 of following the description Entrance.In multiple entrances, the first port 18a as a part is connected to the first connectivity slot 13, remainder Second port 18c is connected to the second connectivity slot 13 '.The fluid squeezed out as a result, by piston component 70 can be by the first connectivity slot 13 or second connectivity slot 13 ' be discharged.

First connectivity slot 13 is connected to first port 18a, and the second connectivity slot 13 ' is connected to second port 18c.Such as figure 1 to shown in Fig. 3, and the first port 18a and second port 18c are to the outer openings of fluid pump, first port 18a and second Port 18c may be coupled to external device (ED) for example, executor (not shown) or fluid reservoir (fluid reservoir, does not scheme Show).Foregoing first connectivity slot 13, the second connectivity slot 13 ' and coupled first port 18a and second port Quantity, the location and shape of 18c are only example, can be changed.

The driving space 12 of first shell 10 has inner housing 15 and locking ring portion 14.Inner housing 15 and first shell 10 Inner surface is in close contact, and the most inner side that locking ring portion 14 is located at driving space 12 is locked in cylinder block as described below herein 50 edge part.Inner housing 15 and locking ring portion 14 can be omitted or integrally formed with first shell 10.

In this embodiment, the lid 17 and first shell 10 positioned at the end of first shell 10 are integrally formed.By institute The synthetic resin material for stating first shell 10 is formed by injection moulding, so lid 17 can also be formed together as first shell 10 a part.Certainly, lid 17 is assembled again after can also being separately manufactured with first shell 10.Appended drawing reference 18b is indicated One of external intercommunicating pore 18 indicates the tap 18b that compressed air is discharged in the assembling process of drive shaft 90.Discharge Hole 18b constitutes the external intercommunicating pore 18 for being formed in first shell 10 together with above-mentioned first port 18a and second port 18c.

The edge of the first shell 10 is provided with first flange 19.The first flange 19 is from the side of first shell 10 Protrusion is divided in edge, is the part with the assembling of the second flange 31 of second shell 30.When first shell 10 and second shell 30 assemble The first flange 19 and second flange 31 are closely contacted with each other, if fastened in this part fasteners (not shown), It can be with first shell 10 assembled with one another and second shell 30.

As shown in Fig. 2, protruding second flange 31 in the second shell 30, multiple are through with round second flange 31 Two fastener holes 32.Second fastener hole 32 is on the identical position of the first fastener hole 19 ' with first flange 19 with identical Quantity is formed.Fastener passes through the second fastener hole 32, and part of it is mobile to the first fastener hole 19 ' and assembles each other, for this purpose, the Caning be processed on 32 inner surface of one fastener hole 19 ' and the second fastener hole has screw thread.

Cylindric matrix 34 is protruded in the second shell 30, and swash plate 35 is equipped on matrix 34.Swash plate 35 be with It is skewed from the part outstanding of second shell 30, when first shell 10 and second shell 30 assembled with one another, the swash plate 35 In in driving space 12.It is skewed due to swash plate 35, relative to the component that swash plate 35 rotates, more precisely cylinder block 50, during piston component 70 and retainer 80 are rotated along the inclined surface 36 of swash plate 35, phase constantly becomes Change.Since swash plate 35 is fixed on shell 10,30, itself is not rotated, but the piston component 70 of relative rotation surrounds During rotating around swash plate 35, height changes.In this embodiment, the swash plate 35 and second shell 30 1 Body is formed, can also be assembled after separately fabricated again.

The outside outstanding of the swash plate 35, more precisely, the outer surface towards cylinder block 50 has inclined surface 36, Its center has first shaft hole 33.The part that the drive shaft 90 that the first shaft hole 33 is discussed further below passes through.Due to swash plate 35 Tilted shape, the inclined surface 36 has to the part more outstanding of cylinder block 50 and less part outstanding.

The inclined surface 36 is located at swash plate 35 in this embodiment, but inclined surface 36 may be alternatively located at cylinder block 50.That is, only Cylinder block 50 and inclined surface 36 is wanted to be inclined relative to one another, therefore can be in face of the outer surface phase of the cylinder block 50 of swash plate 35 The mode of ground inclination is formed.

It is intended for that there is cylinder block 50 on the position of the swash plate 35.The cylinder block 50 is assembled into driving space 12, And with fixed 35 relative rotation of shell 10,30 and swash plate.Cylinder block 50 is the component rotated by drive shaft 90, such as Fig. 2 institute Show, it is generally cylindrical.It is formed with the second axis hole 52 in the center of cylinder block 50, being fitted into the second axis hole 52 has drive shaft 90.Second axis hole 52 is connected with first shaft hole 33.

There are multiple cylinder-bores 55 in the cylinder block 50.Inserted with the piston body for constituting piston component 70 in cylinder-bore 55 71.Piston body 71 is along 55 linear movement of cylinder-bore, and fluid is compressed or sucked in the process.Around cylinder block 50 Multiple cylinder-bores 55 are formed on the circumferencial direction of central peripheral, each cylinder block is embedded.

Referring to Fig. 4, the cylinder-bore 55 is formed by two parts with different-diameter.The relatively large part of diameter is The piston portion 55a that piston body 71 passes in and out, the relatively small part of diameter are discharge or the fluid flow portion 55b for attracting fluid.Institute Fluid flow portion 55b is stated to be connected with the first connectivity slot 13 as described above and the second connectivity slot 13 '.The piston portion 55a and stream Various modifications may be made for the shape and size of body flow portion 55b.

Has piston component 70 between the cylinder block 50 and swash plate 35.The piston component 70 is made of multiple, number It measures identical as the cylinder-bore 55 of foregoing cylinder block 50.Piston component 70 played while entering and leaving cylinder-bore 55 compression or Suck the effect of fluid.Piston component 70 is in close contact by the inclined surface 36 of retainer 80 and swash plate 35 as described below, root The phase changed during according to being rotated around inclined surface 36 enters and leaves the inside and outside of cylinder-bore 55, carries out linear reciprocal fortune It is dynamic.

As shown in figure 5, specifically observation piston component 70 is it is found that the piston component 70 can be roughly divided into piston body 71, ball And-socket joint 73 and presser unit 76.The piston body 71 is the part that linear reciprocal movement is carried out inside cylinder-bore 55, is formed For cylindrical shape.It is connected separately with ball-and-socket joint 73 and presser unit 76 at the both ends of piston body 71, and is moved together with piston body 71 It is dynamic.It is equipped with connector mounting hole 72 in one end of the piston body 71, the other end is equipped with assembling protrusion 72 '.Ball-and-socket joint 73 can It is rotatably pressed into connector mounting hole 72, is pressed into presser unit 76 in assembling protrusion 72 '.

The ball-and-socket joint 73 is for connecting piston body 71 and retainer 80.The ball-and-socket joint 73 is in a rotatable way Connect piston body 71 and retainer 80.More specifically, the Piston connecting portion 75 positioned at 73 side of ball-and-socket joint rotatably connects It connects in piston body 71 in face of part, the i.e. connector mounting hole 72 in the outside of cylinder-bore 55, and the retainer interconnecting piece of the other side It is rotatably connected to the keeper bore 82 of the retainer 80.Therefore, the maintenance of ball-and-socket joint 73 can be in retainer 80 and work The state rotated freely to a certain extent between cock body 71, therefore can compensate in the opposite of retainer 80 and piston component 70 The gap generated in moving process by the inclined surface 36 of swash plate 35.

The Piston connecting portion 75 and retainer interconnecting piece of the ball-and-socket joint 73 are approximately spherical, are respectively pressed into and pacify in connector It fills in hole 72 and keeper bore 82.And retainer interconnecting piece is provided with ball 74.The ball 74 is pressed into retainer In ball press-in hole on the inside of interconnecting piece, and connect in a rotatable way.The ball 74 be by the retainer 80 with The part that the inclined surface 36 of the swash plate 35 is in close contact.The ball 74 is played to be reduced in the rotary course of piston component 70 The effect of friction between ball-and-socket joint 73 and the inclined surface 36 of swash plate 35.

In addition, constituting in the presser unit 76 and piston body 71 of the piston component 70 and ball-and-socket joint 73 connected component Opposite side part combines, and in the present embodiment, the assembling grove 77 for being formed in the presser unit 76 is pressed into as described above In the assembling protrusion 72 ' of piston body 71.The presser unit 76 played in the cylinder-bore 55 of the cylinder block 50 to fluid into The effect of row pressurization.The presser unit 76 is that the part of fluid is substantially pushed in the moving process of piston component 70, tightly Contiguity touching plays the role of strength in the inner surface of the piston portion 55a of cylinder-bore 55 and pushes fluid.When using water in fluid, need Presser unit 76 is wanted, but in the case of the oil, it is convenient to omit presser unit 76.

As shown in Fig. 2, retainer 80 and the swash plate 35 are in close contact.The retainer 80 is kept and the swash plate 35 The state that inclined surface 36 is in close contact, but rotated independently of swash plate 35.The retainer 80 has circular plate structure Discoid disc body 81 is connected with the ball-and-socket joint 73 of the piston component 70, plays and closely connect piston component 70 It touches in the effect of the inclined surface of swash plate 35 36.That is, the retainer 80 keeps the ball-and-socket joint 73 of piston component 70, ball-and-socket is prevented Connector 73 is detached from from inclined plate 35.

The retainer 80 is rotatably connected to the central part of swash plate 35.The retainer 80 can with swash plate 35 The corresponding certain tilt angle in inclined surface 36 rotate without shaking.That is, the retainer 80 is with holding and tiltedly The state that the inclined surface 36 of disk 35 is parallel is rotated.Therefore, it can prevent retainer 80 from surrounding and base during the operation of pump The unrelated other rotation axis of this rotation axis are arbitrarily rotated or are tilted.

The structure that the retainer 80 is assembled into the swash plate 35 is observed, the retainer 80 is assembled by rotary joint 88 To swash plate 35.As shown in Figure 2 and Figure 4, the rotary joint 88 is embedded in the edge of the centre bore 83 of retainer 80.Herein, As shown in Fig. 2, the rotary joint 88 can be as the structure for being installed to swash plate 35 with the other component that swash plate 35 separates, It can be integrally formed with swash plate 35.When rotary joint 88 and swash plate 35 are integrally formed, with the centre bore 83 of the retainer 80 The mode of the middle insertion rotary joint 88, is assembled in swash plate 35 for retainer 80.

Multiple keeper bore 82 are formed in a circumferential direction around centre bore 83.The retainer of the ball-and-socket joint 73 connects Portion is embedded in the keeper bore 82.The keeper bore 82 runs through the retainer 80, when retainer interconnecting piece is embedded in When in the keeper bore 82, the ball 74 of retainer interconnecting piece passes through retaining hole 82, contacts with the inclined surface 36 of swash plate 35.This The state of sample is shown in Fig. 4.

Appended drawing reference 90 indicates drive shaft 90.Drive connection in the drive shaft 90, positioned at the side of shaft body 91 Portion 92 is connected with driving portions (not shown) such as motor and receives rotary force, the cylinder interconnecting piece 93 and cylinder block 50 of the other side It is connected and the rotary force of driving portion is transferred to cylinder block 50.As shown in Figure 1, being integrated to the state of fluid pump in drive shaft 90 Under, drive connection portion 92 is in the outside state outstanding to shell 10,30.

In the present invention, the shell 10,30, cylinder block 50, piston component 70 and retainer 80 can be by synthesizing tree Rouge material is made.That is, they can be assembled after being made by injection molding.Synthetic resin material is easy Molding, and each component can flexible deformation to a certain extent so that the assembling by indentation becomes easier to.

Next, being illustrated to the operating process of fluid pump according to the present invention:

It is illustrated referring to Fig. 6, firstly, driving portion rotates drive shaft 90.When drive shaft 90 is revolved along the direction of arrow 1. When turning, the cylinder block 50 for being fixed on drive shaft 90 rotates together.Cylinder block 50 is rotated with direction identical with drive shaft 90, arrow 2. indicating the direction of rotation of cylinder block 50.At this point, the rotation axis of cylinder block 50 becomes drive shaft 90.

When cylinder block 50 rotates, the piston component 70 for being inserted in cylinder block 50 rotates together.Due to the work of piston component 70 Cock body 71 is inserted into the cylinder-bore 55 of cylinder block 50, therefore as the rotary-piston component 70 of cylinder block 50 also rotates together. It the piston component 70 that is inserted into multiple cylinder-bores 55 while being rotated.

When piston component 70 rotates, the retainer 80 for being connected to piston component 70 also rotates.It is arranged in piston component 70 Ball-and-socket joint 73 be attached with retainer 80 while connect with piston body 71, as a result, piston component 70 makes retainer 80 rotations.The retainer interconnecting piece of the ball-and-socket joint 73 is pressed into the keeper bore 82 of the retainer 80 respectively, and can revolve Turn.Since retainer 80 can be rotated independently of swash plate 35, with fixed 35 relative rotation of swash plate.3. arrow indicates retainer 80 direction of rotation.

When retainer 80 rotates, retainer 80 is in the holding angle parallel with the inclined surface 36 of swash plate 35 and rotation.Its Reason is that retainer 80 maintains the state being in close contact with swash plate 35 by rotary joint 88, as a result, the retainer 80 It is revolved in the case where will not being shaken in rotary course to have certain inclination angle corresponding to the inclined surface 36 of swash plate 35 Turn.Therefore, it can prevent retainer 80 in the operating process of pump around another rotary shaft unrelated with basic rotation axis Any rotation or inclination of line.

In addition, since the retainer 80 is keeping the angle parallel with the inclined surface 36 of swash plate 35 and rotation, with The piston component 70 that retainer 80 rotates together carries out lifting moving by inclined surface 36.Referring to Fig. 6, when the piston component in left side 70 rotate and when moving to the right, are moved to relatively high position and therefore rising along inclined surface 36.As a result, piston Medial movement of the piston body 71 of assembly 70 to cylinder-bore 55.When piston component 70 further rotates, piston component 70 is again It is secondary to be moved downward to relatively low position along inclined surface 36 and therefore decline.4. arrow indicates 70 side of lifting of piston component To.

Also, in the lifting process of piston component 70, piston component 70 carries out compression/extension movement, flows in the process Body is compressed or is sucked.The fluid being present in cylinder-bore 55 is compressed in the uphill process of piston component 70 and by the One connectivity slot 13 is discharged by first port 18a.Meanwhile the piston component 70 of decline is drawn fluid by second port 18c To the inside of the second connectivity slot 13 ', prepare to be compressed during next with this.With the cylinder block 50, piston component 70 and retainer 80 rotation, be carried out continuously this sequence of operations, thus repeat sucking and discharge process.

At this point, the first port 18a or second port 18c of shell 10,30 can be cut according to the direction of rotation of drive shaft 90 Change entrance or the outlet of fluid into.That is, when being benchmark with specific piston component 70, when cylinder block 50 is revolved clockwise Piston component 70 carries out compression movement when turning, and when cylinder block 50 rotates counterclockwise, piston component 70 carries out stretching routine.As a result, First port 18a and second port 18c is by being discharged or sucking fluid conversion direction.This is that swash plate 35 is fixed and cylinder block The advantages of obtaining when 50 rotation has the formation direction that switching oil pressure can be easy by the direction of rotation of switching drive shaft 90 The advantages of.

In addition, the retainer interconnecting piece in ball-and-socket joint 73 has ball 74, ball 74 and the inclined surface 36 of swash plate 35 are tight Contiguity touching.Ball 74 is pressed into the ball press-in hole for the inside for being set to retainer interconnecting piece and connects in a rotatable way It connects, the ball 74 is being played in the rotary course of piston component 70 between reduction ball-and-socket joint 73 and the inclined surface 36 of swash plate 35 Friction effect.

Although all constituent elements for being construed as the embodiment of the present invention are combined as a whole or are grasped in a manner of combination Make, but the present invention is not limited to these Examples.That is, within the scope of the invention, all constituent elements can choose one It is operated more than a.It should be understood that term " includes " as used herein, " composition " or " having " refer to can have There is this composition element, unless otherwise indicated opposite situation, but should be interpreted not exclude other constituent elements, It can also include other elements.Unless otherwise defined, all terms including technology or scientific term have with belonging to the present invention The normally understood identical meaning of the those of ordinary skill in field.In advance by the essential term of dictionary definition should be interpreted with The identical meaning of meaning in the context of related fields is not necessarily to be construed as idealizing unless explicitly defining in the present invention Or the meaning excessively formalized.

Described above is only to technical idea of the invention for example, in the feelings for not departing from intrinsic propesties of the invention Under condition, various modifications can be carried out and variation by those skilled in the art.Therefore, disclosed embodiment of this invention is not intended to It limits the scope of the invention, but it is disclosed in order to illustrate the present invention, these embodiments are not intended to limit technology of the invention and think The range thought.Protection scope of the present invention should be subject to claims and explain, all in same protection of the invention Within the scope of technical idea, should all be interpreted to be included within protection scope of the present invention.

Claims

1. a kind of fluid pump characterized by comprising

Shell (10,30), the enclosure interior are formed with driving space (12)；

Swash plate (35), the swash plate are located at the driving space (12) of the shell (10,30), and the state being kept fixed simultaneously has inclination Face (36)；

Cylinder block (50), which is located at the driving space (12) and is rotated by drive shaft (90), more in inside A cylinder-bore (55) and drive shaft (90) same direction extend；

Multiple piston components (70), the cylinder-bore (55) that at least part of the piston component is inserted in cylinder block (50) is internal, Linear movement is carried out in the inside of the cylinder-bore (55) while rotation with the cylinder block (50), one end has Ball-and-socket joint (73)；And

Discoid retainer (80), the retainer and swash plate (35) combine and maintain to be in close contact in the state of inclined surface (36), It can be rotated independently with swash plate (35), be connected with the ball-and-socket joint (73) of the piston component (70), by piston component (70) It is in close contact in the state of the inclined surface (36) of swash plate (35), as the piston component (70) rotates together；

The retainer (80) is rotatably engaged by rotary joint (88) in the central part of the swash plate (35), is had pair It is rotated in the case where certain inclination angle of the inclined surface (36) of swash plate described in Ying Yu (35)；

The rotary joint (88) is fixedly connected with the swash plate (35)；

The rotation of the drive shaft (90) is able to drive cylinder block (50) and multiple piston components (70) rotate together, to drive The discoid retainer (80) rotates independently relative to swash plate (35) so that the discoid retainer (80) maintain with tiltedly The state that disk (35) is in close contact.

2. fluid pump according to claim 1, which is characterized in that the retainer (80) is with certain thickness disk Shape, central part have the centre bore for being embedded in the rotary joint (88) by the drive shaft (90), with the centre bore are The heart is formed with multiple keeper bore (82) in a circumferential direction to be pressed into the ball-and-socket joint (73).

3. according to claim 1 to fluid pump described in any one of 2, which is characterized in that the piston component (70) includes:

Piston body (71), the piston body are inserted in the cylinder-bore (55) of the cylinder block (50)；And

Ball-and-socket joint (73), one end are pivotably coupled in the piston body (71) towards the part on the outside of cylinder-bore (55), The other end is connected to the retainer (80).

4. fluid pump according to claim 3, which is characterized in that the both ends of the ball-and-socket joint (73) are respectively rotatably It is connected to the piston body (71) and retainer (80) of piston component (70).

5. fluid pump according to claim 4, which is characterized in that the indentation of one end of the ball-and-socket joint (73) is in being assemblied in The connector mounting hole (72) of the piston body (71), the other end, which has, to be in close contact by the retainer (80) in the swash plate (35) ball of inclined surface (36).

6. fluid pump according to claim 5, which is characterized in that be combined with the ball-and-socket joint in the piston body (71) (73) opposite side of part is combined with presser unit (76), cylinder-bore of the presser unit (76) in the cylinder block (50) (55) it pressurizes to fluid.