CN208518828U - A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure - Google Patents
A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure Download PDFInfo
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- CN208518828U CN208518828U CN201820764350.9U CN201820764350U CN208518828U CN 208518828 U CN208518828 U CN 208518828U CN 201820764350 U CN201820764350 U CN 201820764350U CN 208518828 U CN208518828 U CN 208518828U
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Abstract
Swash plate plunger pump or motor the utility model discloses a kind of sphere static pressure bearing sliding plate auxiliary structure and comprising the structure, including swash plate and sliding plate, the sliding plate is overall structure, the end face of the sliding plate is provided with multiple plunger ball-and-sockets, the sliding plate end face is provided with static-pressure supporting spherical, the swash plate has Ball support identical with static-pressure supporting spherical radius of curvature face, oil-through-hole is provided on sliding plate, the oil-through-hole introduces oil liquid between static-pressure supporting spherical and Ball support face, and the static pressure oil film for making the sliding plate and swash plate form clearance fit supports.On the one hand the utility model eliminates the piston shoes structure of multiple dispersions, the eccentric wear that can prevent piston shoes centrifugation from generating and return plate fracture, on the other hand, using spherical surface sliding plate auxiliary structure and cone-shaped plunger structure, drastically reduce the cross component force of effect lower prop beyond the Great Wall, the wedge gap for occurring excessive between cylinder body and valve plate is prevented, therefore, the utility model structure improves the functional reliability and working life of swash plate plunger pump or motor.
Description
Technical field
The utility model belongs to hydraulic drive and control technology field, in particular to a kind of sphere static pressure supports sliding plate pair knot
Structure and swash plate plunger pump or motor comprising the structure.
Background technique
Axial plunger pump and motor are in Modern hydraulic transmission using most wide one of Hydraulic Elements, wherein hingeless formula inclined shaft
Pump and crawler shoe cam-type axial piston pump are most widely used at present, are also most important two classes axial plunger pump.Inclined disc type column
Plug pump is pumped compared to clino-axis type, and relatively simple for structure, compact, small volume, lighter in weight are swung by swash plate and realize stepless change
Amount, variable is more convenient, and variable format is relatively more, and the inertia of variable is small, and variable response speed is than very fast, therefore, inclined disc type column
Plug pump becomes a kind of present most important type of pump.
Existing swash plate plunger pump or its operating pressure of motor and operating rate are relatively high, the reason is that breaching
Core key technology, wherein being exactly one of key technology using piston shoes auxiliary structure, Slipper coupling makes plunger and swash plate by point
Or line contact becomes face contact, and makes using liquid static-pressure support the face contact for becoming having lubrication between plunger and swash plate,
The friction of plunger and swash plate can be substantially reduced in this way, so that the operating pressure of swash plate plunger pump or motor greatly improves.By
This is as it can be seen that Slipper coupling is the important critical component of axial plunger pump, in hydraulic axial plunger pump high-voltage high-speed development process,
The appearance of piston shoes to the specific contact pressure reduced between plunger and swash plate, reduce fretting wear, improve efficiency and functional reliability meaning
It is great.Therefore, the improvement of any pair of Slipper coupling may exert far reaching influence to the performance for improving axial plunger pump, especially exist
It is even more so under the development trend of hydraulic drive high-voltage high-speed.
As shown in Figure 1, being piston shoes auxiliary structure and return mechanism common in the art.Wherein, Slipper coupling is by piston shoes 120
It is formed with swash plate 40, piston shoes 120 are that support pushes plunger to axially move to liquid acting with swash plate 40, and piston shoes 120 subject
Hydraulic coupling, spring force, inertia force and frictional force, while high-speed slide is done on swash plate again；Return mechanism include return plate 130,
The components such as central spring 100, sleeve 106, steel ball 104,100 one side of central spring can allow between cylinder body 80 and valve plate 90
Pre- envelope is kept, on the other hand, precompression is compressed return plate 130, return plate by sleeve 106, steel ball 104 by central spring 100
130 main function is to compress piston shoes 120, is bonded its piston shoes surface uniformly with swash plate working face, to pull plunger in cylinder
Scapus plug is intracavitary to move reciprocatingly, and since central spring 100 bears dead load, decrement does not become with the rotation of pump main shaft,
Therefore central spring will not generate fatigue rupture.
This structure has the following characteristics that
1, both Slipper coupling and return mechanism are relatively independent components, and the piston shoes being connected with each plunger are also independent
Component.It is to connect between Slipper coupling and return mechanism, on the one hand this structure should guarantee that return plate and piston shoes table top are equal
Even fitting, it is desirable that return plate cannot be too thick, needs certain deformability, on the other hand to prevent between piston shoes and return plate
It interferes, it is high to the boring requirement of return plate, i.e., to make to keep certain gap between piston shoes neck and return plate drilling, it is no
It is then easy so that phenomena such as piston shoes neck and shoulder abrasion even cause failure by shear, and return plate boring sites in curing cracks.
2, produced by piston shoes are rotated by centrifugal moment caused by circumferential movement and with cylinder body during high speed exercise
Moment of friction comprehensive function under, can make piston shoes with respect to swash surfaces generation topple, to form wedge-shaped oil film, and lead to piston shoes
Eccentric wear, to destroy the normal work of piston shoes.Practice have shown that pump practical work process in, piston shoes eccentric wear abrasion be exactly because
Occur caused by seriously toppling for piston shoes, influence of this eccentric wear to pump or motor is very big.
3, with pressure, the raising of revolving speed, when the wearability of oil lubrication and friction pair material is not good enough, due to
The presence of residual clamping force more serious abrasion will occur between piston shoes and swash plate friction pair, or even " burning boots " phenomenon occurs.
4, each piston shoes and return plate are individual member, at the same be also high-precision tooling member, therefore, processing capacity compared with
Greatly, processing request is higher.
5, since both piston shoes and return plate are components relatively independent and with certain interval, it deposits between the two
Phenomena such as friction, pushing, impacting, it is easy to issue larger mechanicalness noise.
6, the supporting force that swash plate provides can generate a lateral component, which acts on cylinder body via plunger, make
Inclination of the cylinder body generation relative to flow side surface is obtained, when tilting larger, cylinder body and sliding plate seal break-off generate excessive let out
Leakage, so that the oil film supporting of cylinder body and valve plate be made to fail.
Utility model content
The goal of the invention of the utility model is: in view of the above problems, providing one kind can prevent piston shoes to be centrifuged
Eccentric wear, return plate fracture and the cylinder body inclination failure of generation, to improve functional reliability, extend the sphere static pressure of working life
Support sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure.
The technical solution implementation of the utility model technology: a kind of sphere static pressure bearing sliding plate auxiliary structure, feature exist
In: the sliding plate auxiliary structure includes the sliding plate for providing the swash plate of bearing and being supported on swash plate, and the sliding plate is whole
Structure, the end face of the sliding plate towards cylinder body side are provided with multiple plunger ball-and-sockets, and the sliding plate end face opposed with swash plate is set
It is equipped with static-pressure supporting spherical, the swash plate end face opposed with sliding plate has ball branch identical with static-pressure supporting spherical radius of curvature
The static-pressure supporting spherical of bearing surface, the sliding plate is supported on the Ball support face of the swash plate in a manner of it can slide, in the cunning
The oil-through-hole of connection plunger ball-and-socket and static-pressure supporting spherical is provided on disk, oil liquid is introduced the static pressure branch of sliding plate by the oil-through-hole
It holds between spherical surface and the Ball support face of swash plate, the static pressure oil film for making the sliding plate and swash plate form clearance fit supports.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, and the static-pressure supporting spherical of the sliding plate is equipped with
Multiple grease chambers, the grease chamber are distributed on static-pressure supporting spherical by center compartment of terrain of sliding plate axle center, each grease chamber bottom with
It is provided with oil-through-hole between corresponding plunger ball-and-socket, oil liquid is introduced the grease chamber by the oil-through-hole, makes the static-pressure supporting spherical
The static pressure oil film for forming clearance fit with swash plate end face supports.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, and the static-pressure supporting spherical is on sliding plate, edge
The radial spherical surface boss face extended to swash plate side, is provided with multiple grease chambers, the grease chamber is with cunning in the spherical surface boss face
The dish axle heart is that center compartment of terrain is distributed in spherical surface boss face, is provided between each grease chamber bottom and corresponding plunger ball-and-socket logical
Oil liquid is introduced the grease chamber by oilhole, the oil-through-hole, and the end face of the spherical surface boss face and swash plate is made to form clearance fit
Static pressure oil film bearing.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, is provided with and is used in the spherical surface boss face
The sealing of oil liquid is sealed, the sealing includes the interior sealing and outer seal portion that the radially inner and outer side of grease chamber is arranged in, and
Separation seal portion between adjacent grease chamber is set.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, sets in the spherical surface boss face periphery of the sliding plate
Multiple aiding support faces are equipped with, are provided with radial drain pan between the aiding support face, the aiding support face and described outer
It is provided with annular drain pan between sealing, is interconnected between the radial direction drain pan and annular drain pan.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, and the oil-through-hole or plunger centre bore are arranged to
Damping hole is provided with damper, and the damping hole or damper can make the oil pressure of grease chamber change with external load and change, with
The hydrostatic support fed back with oil film pressure is formed, so that gap is in metastable shape always between the sliding plate and swash plate
State.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, at the sliding plate axle center of the sliding plate and swash plate
Be formed with the pin hole of an opening on opposed end face, the central axle portion of the sliding plate and swash plate is arranged pivot pin, the pivot pin with
The mode for penetrating through the swash plate is inserted into the pin hole of the sliding plate and is slidably matched with the sliding plate, and the sliding plate is relative to axis
Pin is rotated around Pivot Point Center.
Sphere static pressure described in the utility model supports sliding plate auxiliary structure, is provided at least one on the sliding plate and passes through
Logical sliding plate unloads oilhole, and the two sides of sliding plate are connected to by the oilhole that unloads, and the oilhole that unloads can will be trapped between sliding plate and swash plate
Oil liquid lead in the chamber of shell.
A kind of includes the swash plate plunger pump or motor of above-mentioned sphere static pressure bearing sliding plate auxiliary structure, including main shaft, shell
Body, first bearing, second bearing, plunger, cylinder body, valve plate and central spring, the spindle axis of the main shaft and the cylinder
The cylinder center axle center of body is overlapped, and described main shaft one end is supported in first bearing, the other end penetrate through valve plate and with the cylinder
Body is connected by key, and the cylinder body is supported in second bearing by cylinder sleeve, and the plunger ball of the plunger is fixed on the cunning
It being slidably matched on the plunger ball-and-socket of disk and with plunger ball-and-socket, the central spring is compressed the sliding plate by sleeve and steel ball,
The static-pressure supporting spherical of the sliding plate is supported on swash plate, and keeps being fitted close with the Ball support face of the swash plate, the master
In rotary work, under the reverberation matrix method effect of the supporting force and central spring of the swash plate, the plunger is in cylinder for axis and cylinder body
It moves reciprocatingly in the plunger cavity of body, realizes the suction oil work of pump or motor.
Swash plate plunger pump or motor described in the utility model, the plunger include the connecting rod column with pyramidal structure
Plug, both ends are provided with one kind of the rod-plunger of bulb, spherical surface plunger with universal hinge, and the plunger at one end can opposing cylinder
In the plunger hole of cylinder body described in the mode borrowing to reciprocatingly slide, the other end is with opposite sliding plate end face far from limited and can fascinate
State is fixed on the plunger ball-and-socket of the sliding plate.
Swash plate plunger pump or motor described in the utility model, one end of the pivot pin is with can opposite slide valve sliding
Mode is connect with slide valve, and the hydraulic coupling of stroking mechanism drives the slide valve to move back and forth, and via pivot pin drive the swash plate and
Sliding plate fascinates relative to pivot pin axle center and the intersection point in cylinder center axle center, realizes the variable of swash plate plunger pump or motor.
Based on the above-mentioned technical proposal, the beneficial effects of the utility model are:
1, the hydrostatic support sliding plate structure of the utility model by multiple independent piston shoes and with piston shoes connect backhaul
Disk integrates so that plunger connect with sliding plate, sliding plate and platen it is relatively reliable, avoid in original structure piston shoes neck and
Phenomena such as shoulder abrasion, failure by shear and return plate boring sites in curing crack, to improve swash plate plunger pump or motor
Functional reliability.
2, the monoblock type sphere static pressure that the utility model uses supports sliding plate structure, the centrifugal force of sliding plate each section and friction
Power is cancelled out each other, and avoids single piston shoes during high speed exercise by centrifugal moment caused by circumferential movement and with cylinder body
Piston shoes can be made to topple under moment of friction comprehensive function caused by rotating with respect to swash surfaces generation, the abrasion of monoblock type sliding plate structure
Uniformly, original Slipper coupling friction phenomenon is eliminate or reduced.
3, the monoblock type sphere static pressure that the utility model uses supports sliding plate structure, due to biggish contact area,
Therefore, it wears smaller and more uniform between sliding plate and swash plate friction are secondary, avoids occurring " burning disk " phenomenon too early, be conducive to further
Improve operating pressure, the working speed of pump or motor.
4, on the one hand, due to using rod-plunger structure, the lateral force of sliding plate is acted on by acting on plunger
Lateral force on cylinder body reduces, since the lateral force that cylinder body is subject to is reduced further such that the lateral moment of flexure acted on main shaft subtracts
It is few, therefore be conducive to cylinder body end face and valve plate holding tight fit, prevent oil liquid from occurring from cylinder body end face and flow side surface
The diseases such as excessive leakage loss, eccentric wear be serious, improve the service life and operating pressure of pump or motor.
On the other hand, due to using sphere static pressure sliding plate auxiliary structure, lateral force one of plunger is acted on via swash plate
Divide and be cancelled, another part is transferred in swash plate by the pivot pin at setting sliding plate axle center, therefore, acts on cylinder body via plunger
On cross component force be almost cancelled so that the opposite inclination very little between flow side surface of cylinder body or not generating, to protect
The validity of the oil film supporting of cylinder body and valve plate is demonstrate,proved.
5, the monoblock type sphere static pressure that the utility model uses supports sliding plate structure, advantageously reduces because of piston shoes and return plate
There are gap because of mechanicalness noise caused by the reasons such as friction, pushing, impact.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of skid shoe type oblique plate plunger pump or motor in the prior art.
Fig. 2 is a kind of reality of the swash plate plunger pump with spherical surface hydrostatic support sliding plate auxiliary structure or motor in the utility model
Apply a structural schematic diagram.
Fig. 3 is a kind of structural schematic diagram that sphere static pressure supports sliding plate auxiliary structure in the utility model.
Fig. 4 is a kind of embodiment schematic diagram of sliding plate in the utility model.
Fig. 5 is another embodiment schematic diagram of sliding plate in the utility model.
Fig. 6 is a kind of embodiment schematic diagram of the sliding plate with aiding support face in the utility model.
Fig. 7 is A-A sectional view in Fig. 4 and Fig. 5.
Fig. 8 is the direction sliding plate y-z force analysis figure in the utility model.
Fig. 9 is the resultant force figure in the direction sliding plate x-y in the utility model.
Figure 10 is the resultant force exploded view in the direction sliding plate x-y in the utility model.
Marked in the figure: 10 be main shaft, 10C is spindle axis, and 11 be first bearing supporting part, and 21 be first bearing, and 22 are
Second bearing, 31 be the pump housing, and 32 be housing body, and 33 be end cap or stroking mechanism, and 33a is slide valve, and 34 be the first cavity, 35
It is bolt for the second cavity, 36,40 be swash plate, and 40C is pin shaft axle center, and 43 be pivot pin, and 43a is pivot pin front, and 43b is after pivot pin
Portion, 50 be sliding plate, and 50a is static-pressure supporting spherical, and 50C is sliding plate axle center, and 51 be spherical surface boss face, and 52 be grease chamber, and 53 be logical oil
Hole, 54 be outer seal portion, and 55 be interior sealing, and 56 be separation seal portion, and 57 is unload oilhole, and 58 be plunger ball-and-socket, centered on 59
Ball-and-socket, 510 be auxiliary bearing surface, and 511 be radial drain pan, and 512 be annular drain pan, and 513 be pin hole, and 60 be pressing plate, 70
It is plunger ball for plunger, 71,72 be plunger centre bore, and 73 be taper bar portion, and 74 be plunger portion, and 80 be cylinder body, and 81 be plunger
Hole, 82 be main shaft pilot hole, and 83 be cylinder body end face, and 84 be cylinder sleeve, and 80C is cylinder center axle center, 90 be valve plate, and 100 are
Heart spring, 104 be steel ball, and 105 be sleeve, and 106 be housing, and 120 be piston shoes, and 130 be return plate, and AH is higher-pressure region, and AL is low
Pressure area.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
Although the utility model admits of various forms of embodiments, the specification and drawings disclose only such as this reality
With novel exemplary some particular forms.However the utility model is not intended to be limited to the embodiment described.The utility model
Range provide in the appended claims.
For the convenience of description, the embodiments of the present invention are shown with being typically oriented, the orientation is so that when inclined disc type
The central axis horizontal rest of the main shaft of plunger pump or motor is a left side with the shaft coupling end side of main shaft, and end cap is the right side, is made in description
The terms such as " longitudinal direction ", " transverse direction " "upper", "lower", "front", "rear", "left", "right" "horizontal", "bottom", "inner", "outside" are all
It uses, is merely for convenience of describing the present invention and simplifying the description referring to this position, rather than indication or suggestion institute
The device or element of finger must have a particular orientation and specific orientation constructs and operation, it should be understood that this is practical new
The orientation that type can be different from the position is manufactured, is stored, is transported, used and is sold.
For ease of description, emphasis is illustrated swash plate plunger pump, and the structure of oblique tray type plunger motor is referred to
The structure of swash plate plunger pump simultaneously makes necessary change, it should be noted that all utilize the inclined disc type of the utility model principle
In plunger pump or motor can be contemplated as falling with.
As shown in Fig. 2, for a kind of preferred embodiment with spherical surface hydrostatic support sliding plate auxiliary structure in the utility model, it is described
Swash plate plunger pump is presented with bearing bearing cylinder body structure type, but it should be recognized that also comprising being pivotally supported housing structure shape
The swash plate plunger pump of formula.
The swash plate plunger pump includes main shaft 10, shell 30, first bearing 21, second bearing 22, swash plate 40, sliding plate
50, plunger 70, cylinder body 80, valve plate 90 and central spring 100.The spindle axis 10C of the main shaft 10 and the cylinder body 80
Cylinder center axle center 80C be overlapped, described 10 one end of main shaft is supported in first bearing 21, the other end penetrate through valve plate 90 and with
The cylinder body 80 is keyed, and the cylinder body 80 covers 84 by cylinder body and is supported in second bearing 21, and the sliding plate 50 is towards cylinder body
The ring of the end face of side is circumferential to be provided with multiple plunger ball-and-sockets 58 with 70 relative position of plunger, and the bulb of the plunger 70 passes through pressure
Plate 60 is fixed on the plunger ball-and-socket 58 of the sliding plate 50, and is slidably matched with the plunger ball-and-socket 58, the central spring 100
The sliding plate 50 is compressed by sleeve 105 and steel ball 104, the hydrostatic support surface bearing of the sliding plate 50 is in the swash plate 50
On, and keep being fitted close with 40 working face of swash plate, the main shaft 10 and cylinder body 80 are in rotary work, in the swash plate
Under the reverberation matrix method effect of 40 supporting force and central spring 100, the plunger 70 moves reciprocatingly in cylinder body plunger hole 81, real
The now suction oil of pump or motor work.
Wherein, the shell 30 includes the pump housing 31, housing body 32 and end cap 33(or stroking mechanism), the housing body
32 pass through bolt 36 and connect for one end and the pump housing of hollow form, the other end and end cap 33(or stroking mechanism) it connect, the pump housing
31 have the first cavity 34 for accommodating first bearing 21, and oil inlet 31a and oil outlet 31b, institute are arranged on the pump housing
Housing body 32 is stated with the second cavity 35 for accommodating cylinder body 80 and second bearing 22.
First cavity 33 of the cylindrical perforation pump housing 31 of main shaft 10 and the second cavity of housing body 32, on it
It is provided with first bearing supporting part 11, first bearing 21 is folded between the first bearing supporting part 11 and the pump housing 31, it is described
10 one end of main shaft stretches out shell and is used for extraneous prime mover (or load) and is supported on the pump housing 31 via first bearing 21, another
End is connected by key with cylinder body 80, and the main shaft 10 is rotated freely via first bearing 21 around the axle center of itself.
Cylinder sleeve 84 is arranged in the peripheral part of the cylinder body 80, is folded with the second axis between the cylinder sleeve 84 and housing body 32
22 are held, the cylinder body 80 rotates freely under the supporting role of second bearing 22 around Pivot Point Center.The cylinder body 80 is radially
Section is circular column-shaped configuration, and is contained in the second cavity 35 of housing body 32, is had with cylinder center axle center 80C
Circumferential equally distributed multiple plunger holes 81 and the spindle mounted hole 82 for being used to accommodate main shaft at center.The plunger hole 81 and
Spindle mounted hole 82 is circular shape along radial section, and forms opening in the end face of cylinder body towards 50 side of sliding plate.Institute
In the plunger hole 81 for stating 70 one end of plunger borrowing cylinder body 80 in a manner of it can move back and forth, the main shaft 90 is with its axis body periphery
Set key connection type is connect with cylinder body 80, and passes through the spindle mounted hole 82 of cylinder body, and the cylinder body 80 is synchronous with main shaft with it
The mode of movement is supported in second bearing 22.
Wherein, cylinder body spindle mounted hole 82 is provided with the housing 106 to 40 1 side opening of swash plate, in housing 106
Central spring 100 is provided in heart cavity, described 100 one end of central spring is supported on 106 bottom surface of housing, the other end by
Sleeve 105 and steel ball 104 are supported on the center ball-and-socket 59 of sliding plate 50.At work, the central spring 100 is in compression shape
State, by the effect of central spring 100, so that 80 one end of cylinder body acts on to slide via 100 precompression of central spring
Mode is closely abutted with 90 end face of valve plate, and being formed, there is the static pressure oil film of clearance fit to support, and the other end passes through central spring
100 precompressions are acted on and are acted on sliding plate 50 via sleeve 105 and steel ball 104, are adjacent to sliding plate 50 with swash plate 40 always, and
Play the role of backhaul to plunger 70.The valve plate 90 is arranged between the pump housing 31 and cylinder body 80, is arranged on the valve plate 90
There are high-pressure mouth and low pressure port (not shown) and is communicated respectively with the oil inlet 31a of the pump housing 31 and oil outlet 31b, the valve plate 90
High-pressure mouth and low pressure port be divided into two sides by the plane of spindle axis 10C
The plunger 70 includes that one end is supported on the plunger ball-and-socket 58 of sliding plate 50 and is fixed on sliding plate end via pressing plate 60
The plunger ball 71 in face, for being connected to plunger hole 81 and plunger ball-and-socket 58 and oil liquid being passed to the plunger centre bore in hydrostatic support face
72, outer peripheral surface in cone taper bar portion 73 and with 81 wall clearance fit of cylinder body plunger hole and can its move back and forth
Plunger portion 74.The plunger ball 71 is in the taper on the plunger ball-and-socket for being supported on sliding plate that is spherical and can sliding freely
Bar portion 73 is the cone-shaped substantially gradually increased from plunger ball end to plunger portion 74, when plunger 70 moves to a certain position, cone
Shape bar portion 74 is contacted with 81 inner ring of cylinder body plunger hole, plays intermal force.But it should be recognized that plunger 70 is not limited to bore
Shape plunger-type, the plunger and both ends that can also be in the form of a column comprising outer peripheral surface be the rod-plunger of bulb or with universal hinge
Spherical surface plunger.
The ring of end face of the sliding plate 50 towards cylinder body side is circumferential to be provided with multiple plunger balls with 70 relative position of plunger
Nest 58, the plunger ball-and-socket 58 form opening substantially at hemispherical recess portion in 50 end face of sliding plate, and plunger ball-and-socket 58 is in sliding plate
The state of common even circumferential compartment of terrain distribution on 50 with sliding plate axle center 50C supports plunger ball 71, in plunger
It after bulb 71 is mounted on plunger ball-and-socket 58, is fixed in by pressing plate 60 on the end face of sliding plate 50, so that plunger 70 is relatively sliding
The end face of disk 50 is restricted far from movement.Distinguishingly, for plunger 70 is fixed on sliding plate 50 end face mode not yet
It is limited to by the way of pressing plate, for example, it is also possible to be provided with the sealed pressing device (not shown) of shape, the pressure on sliding plate 50
Tight device plunger ball 71 can be fixed by being greater than the cladding of 180 degree.
Wherein, the sliding plate 50 end face opposed with swash plate 40 is provided with static-pressure supporting spherical 50a, the swash plate 40 and cunning
The opposed end face of disk 50 has Ball support face identical with the static-pressure supporting spherical 50a radius of curvature of the sliding plate 50, the cunning
The static-pressure supporting spherical of disk 50 is supported on the Ball support face of the swash plate 40 in a manner of it can slide, and sets on the sliding plate 50
It is equipped with the oil-through-hole 53 for being connected to the plunger ball-and-socket 58 and static-pressure supporting spherical 50a, the oil-through-hole 53 introduces oil liquid
Between the static-pressure supporting spherical 50a of sliding plate 50 and the Ball support face of swash plate 40, so that the sliding plate 50 is formed gap with swash plate 40 and match
The static pressure oil film of conjunction supports.
Further, the static-pressure supporting spherical 50a of the sliding plate 50 is equipped with multiple grease chambers 52, and the grease chamber 52 is with cunning
Dish axle heart 50C is that center compartment of terrain is distributed on the static-pressure supporting spherical 50a, and distinguishingly the grease chamber 52 is uniform intervals point
Cloth, is provided with oil-through-hole 53 between 52 bottom of grease chamber and each plunger ball-and-socket 58, and the oil-through-hole 53 introduces oil liquid
The grease chamber 52, the static pressure oil film for making the static-pressure supporting spherical 50a and 40 end face of swash plate form clearance fit support.
Further, it is provided on the sliding plate 50 end face opposed with swash plate 40 radially to the extension of 40 side of swash plate
The spherical surface boss face 51 of protrusion, the spherical surface boss face 51 are that the region surrounded by interior diameter and overall diameter is constituted, the sliding plate
50 spherical surface boss face 51 is mutually abutted in a manner of it can slide with the Ball support face of swash plate 40.In the spherical surface boss face 51
Upper and 58 position corresponding position of plunger ball-and-socket is additionally provided with grease chamber 52, and the grease chamber 52 is identical as plunger ball-and-socket or plunger quantity, institute
Stating grease chamber 52 is that the common even circumferential compartment of terrain centered on the 50C of sliding plate axle center is distributed in the spherical surface boss face 51,
It is provided with oil-through-hole 53 between each 52 bottom of grease chamber and corresponding plunger ball-and-socket 58, the oil-through-hole 53 is via being set to plunger
The oil-through-hole 53 at center is connected to the high-voltage oil liquid in cylinder body 80, and by high-voltage oil liquid introduce sliding plate 50 spherical surface boss face oil
In room, so that forming the static pressure oil film bearing of clearance fit between spherical surface boss face 51 and the Ball support face of swash plate 40.
In order to make to be formed effective static pressure oil film bearing between spherical surface boss face 51 and swash plate 40, in the spherical surface boss face
The sealing for sealing oil liquid effect is provided on 51, the sealing is arranged with the state for surrounding the grease chamber 52 in grease chamber
Interior periphery, the sealing include be distributed in the radially inner and outer interior sealing 55 of grease chamber, outer seal portion 54, and be arranged in phase
Separation seal portion 56 between adjacent grease chamber.The interior sealing 55 is by the interior diameter of grease chamber 52 inward flange and spherical surface boss face 51
The region surrounded, the outer seal portion 54 are the region surrounded by the overall diameter of 52 outer edge of grease chamber and spherical surface boss face 51, institute
Stating separation seal portion 56 is by the spaced-apart bosses face region between two grease chambers 52, the sealing and swash plate of the spherical surface boss face 51
Remain that certain reasonable gap makes oil film leakage in reasonable level between 40.
Wherein, section in the spherical surface boss face 51 with the grease chamber 52 of 58 position corresponding position of plunger ball-and-socket setting radially
The settable diversified forms in face, Fig. 4-Fig. 6 are three kinds of embodiments shown in the utility model, but the utility model without being limited thereto three
Kind embodiment, all can be contemplated as falling with interior using the embodiment of the utility model principle.
Fig. 4 be one of preferred embodiment, in embodiment, from along sliding plate axle center 50C to sliding plate end view, in cunning
The section of the grease chamber 52 being arranged in the spherical surface boss face 51 of disk radially is in kidney-shaped, and kidney-shaped grease chamber both ends preferentially use half of circular arc
Shape, each kidney-shaped grease chamber is corresponding with corresponding plunger ball-and-socket 58, and kidney-shaped grease chamber is uniformly circlewise distributed in spherical surface boss
On face 51, kidney-shaped grease chamber bottom is provided with the oil-through-hole 53 of connection grease chamber 52 and 50 ball-and-socket of sliding plate.
Fig. 5 be one of embodiment, in embodiment, from along sliding plate axle center 50C to sliding plate end view, in sliding plate
The section of the grease chamber 52 being arranged in spherical surface boss face 51 radially is rounded, each round grease chamber and corresponding plunger ball-and-socket 58 are right
It answers, round grease chamber is uniformly circlewise distributed in spherical surface boss face 51, and round grease chamber bottom is provided with connection grease chamber
With the oil-through-hole 53 of 50 ball-and-socket of sliding plate.
Further, in order to reduce the supporting force on bearing surface, abrasion is reduced, circle can be set in spherical surface boss face 51
On the basis of grease chamber or kidney-shaped grease chamber, multiple aiding support faces 510 are radially added on 50 excircle of sliding plate, as shown in fig. 6,
Be provided with radial drain pan 511 between the aiding support face 510, the aiding support face 510 and the outer seal portion 54 it
Between be also equipped with annular drain pan 512, be interconnected between the radial direction drain pan 511 and annular drain pan 512.
Distinguishingly, the oil-through-hole 53 for penetrating through 52 bottom of grease chamber and plunger ball-and-socket 58 can be arranged to damp well format, or
Damper (not shown) can also be arranged in person in oil-through-hole 53.This structure with damping hole or damper makes 50 end face of sliding plate
The plane static pressure oil film fed back with oil film pressure is formed with swash plate 40 to support.This structure can make the pressure of grease chamber 52 with external load
And change, the specific working principle is as follows: when external load increases, oil film thickness is reduced, and leakage loss is reduced, and passes through the pressure drop of damping hole
It reduces, 52 pressure rise of grease chamber, 50 end face gross thrust of sliding plate increases, so that oil film thickness restores to original value；Conversely, working as outer lotus
It carries and reduces, oil film thickness increases, and leakage loss increases, and the decline of 52 pressure of grease chamber, 50 end face gross thrust of sliding plate is reduced, so that oil film thickness
Restore to original value.
Wherein, the pin hole of an opening is formed on the end face on sliding plate 50, opposed with swash plate 40 at the 50C of sliding plate axle center
513, the central through hole 43 opposed with the pin hole of sliding plate, the sliding plate 50 and swash plate 40 are provided at the 40C of swash plate axle center
Central axle portion is provided with pivot pin 43, and the pivot pin 43 is inserted into the pin hole of the sliding plate 50 in a manner of penetrating through the swash plate 40
And be slidably matched with sliding plate 50, the sliding plate 50 is rotated relative to pivot pin 43 around Pivot Point Center.Distinguishingly, the pivot pin 43 can also
For a part of swash plate 40, i.e. pivot pin 43 is in the pin hole 513 of swash plate central axle portion partial insertion sliding plate outstanding.
For being connected with the stroking mechanism adjusted for variable in 32 rear end face of housing body in variable type oblique plate plunger pump
33, which is equipped with reciprocating slide valve 33a, the other end for the pivot pin 43 connecting with swash plate under action of hydraulic force
It being connect in a manner of it can be slided with respect to slide valve with slide valve, the hydraulic coupling of the stroking mechanism 33 drives the slide valve to move back and forth,
And the swash plate 40 and sliding plate 50 is driven to incline relative to pivot pin axle center 40C and the intersection point of cylinder center axle center 80C via pivot pin 43
It is dynamic, realize the variable of swash plate plunger pump or motor.
It as seen in figs. 8-10, is the force analysis figure of sliding plate, in plunger pump operational process, in higher-pressure region AH, plunger 70
High-voltage oil liquid pressure p by cylinder body plunger hole 81 acts on, and applies one close to horizontal liquid to sliding plate 50 through plunger ball 71
Pressure F1 effect, the hydraulic coupling are pushed sliding plate 50 to swash plate 40 and are in close contact with 40 end face of swash plate.40 end face of swash plate is to sliding plate
50 apply a reaction force F2, since 50 end face of sliding plate with 40 end face of swash plate is contacted in the form of spherical surface, by the ball of swash plate 40
The power that bearing surface acts on sliding plate static-pressure supporting spherical resolves into horizontal component F2z and edge along the direction spindle axis 10C
The cross component force (F2x, F2y) in the vertical major axle center direction 10C.With this simultaneously as sliding plate 50 and swash plate 40 central axis
Portion is provided with pivot pin 43, and therefore, pivot pin 43 generates a reaction force F3 to sliding plate on being in contact with it face, which can
It is decomposed into the cross component force F3x along the horizontal component F3z in the direction spindle axis 10C and along the vertical major axle center direction 10C,
F3y).In addition to this, sliding plate is also by reverberation matrix method F4 effect, inertia force effect (cancelling out each other) and the frictional force of central axis
(not shown) etc. is acted on, above-mentioned several power constitute the balance of the power of sliding plate.
It should be noted that each power acts on the hydraulic coupling F1 of sliding plate along the horizontal component and plunger in the direction spindle axis z
Balance.Along the direction of vertical major axle center 10C (including the cross component force along the direction x and y), as shown in Figures 9 and 10, due to setting
The Ball support face of swash plate 40 can be acted on sliding plate hydrostatic support by the pivot pin 43 for setting the central axle portion in sliding plate 50 Yu swash plate 40
Cross component force (F2x and F3x, F2y and F3y) on spherical surface is transferred on swash plate 40, so that the cross component force is balanced, that is,
Say, acting on the cross component force on sliding plate along the vertical major axle center direction 10C can be offset in sliding plate, without into
One step is transferred in cylinder body via plunger, it may be assumed that the lateral force undertaken in the prior art by cylinder body is undertaken with pivot pin, so that cylinder
Body does not generate inclination with valve plate, and lateral force is transferred to swash plate by pivot pin, and is further transferred to shell.
Wherein, oil liquid is the sphere static pressure oil film branch formed with clearance fit between 40 end face of 50 end face of sliding plate and swash plate
It holds, with swash plate plunger pump in operational process, oil liquid will certainly be produced in the sealing of 50 end face of sliding plate and 40 end face of swash plate
First portion leakage, the oil liquid of the leakage is between 40 end face of 50 end face of sliding plate and swash plate and within the scope of the interior diameter of inner seal band
Gap aggregation, on the one hand the oil liquid lubricating action is played to the sliding of pivot pin and sliding plate, but then, with oil liquid
The aggregation of gap, oil liquid are trapped in gap, so that oil liquid pressure increases, the delay of oil liquid can be generated to sliding plate 50 to cylinder body 80 1
The thrust of side, to destroy the hydrostatic balanced action of 50 end face of sliding plate Yu 40 end face of swash plate.It therefore is to prevent this not
Benefit effect is provided at least one second cavity 35 of the perforation to 50 both ends of sliding plate to housing body 32 on sliding plate 40
Oilhole 57 is unloaded, the oilhole 57 that unloads connects the gap between the second cavity 35 and the sliding plate 50 and swash plate 40 of housing body
It is logical, the oil liquid being trapped between sliding plate 50 and swash plate 40 is led to the second cavity 35 of the housing body of cylinder body side, made hydraulic
Oil liquid does not destroy the bearing of the static pressure oil film between sliding plate 50 and swash plate 40.
Since the monoblock type sphere static pressure of use supports sliding plate structure, sliding plate is by multiple independences in existing piston shoes structure technology
Piston shoes and the return plate that is connected with piston shoes integrate so that plunger and sliding plate, sliding plate and pressure in the utility model
Plate connection is relatively reliable, avoids piston shoes neck and shoulder abrasion, failure by shear and return plate bore portion in original piston shoes structure
Phenomena such as position is cracked, to improve the functional reliability of swash plate plunger pump or motor.Simultaneously as sliding plate is symmetrical
Circular configuration, plunger pump and motor high speed operation operating under, the centrifugal force and frictional force of sliding plate each section are cancelled out each other, and are kept away
Exempt from single piston shoes in existing structure to revolve by centrifugal moment caused by circumferential movement and with cylinder body during high speed exercise
Under moment of friction comprehensive function caused by turning, piston shoes is made to generate topple phenomenon, therefore, monoblock type sliding plate knot with respect to swash surfaces
Structure abrasion are more uniform, eliminate or reduce friction phenomenon in original piston shoes structure.Furthermore the monoblock type hydrostatic support of use is sliding
Dish structure, since bearing stress can be reduced with biggish contact area, therefore, sliding plate and swash plate friction it is secondary between wear it is smaller,
It avoids occurring " burning disk " phenomenon too early, is conducive to the operating pressure and working speed that further increase pump or motor.
Further, since plunger ball being fixed on sliding plate using pressing plate, and backhaul is provided by sleeve and steel ball
Therefore power is conducive to the backhaul of plunger, improve the suction capacity of pump or motor.
Further, the utility model use monoblock type sphere static pressure support sliding plate structure, hydrostatic support face, grease chamber,
Ball-and-socket is processed on sliding plate, and original piston shoes structure must process respectively each piston shoes and return plate, is reduced high-precision and is added
Work component workload.Meanwhile monoblock type hydrostatic support sliding plate structure, it advantageously reduces because of piston shoes and backhaul in original piston shoes structure
Take inventory the mechanicalness noise caused by gap and because of reasons such as friction, pushing, impacts.
Further, on the one hand, due to using rod-plunger structure, act on the lateral force of sliding plate by making plunger
The lateral force acted on cylinder body reduces, since the lateral force that cylinder body is subject to reduces the side further such that on the main shaft acted on
It is reduced to moment of flexure, therefore is conducive to cylinder body end face and valve plate holding tight fit, prevent oil liquid from cylinder body end face and valve plate
There are the diseases such as excessive leakage loss, eccentric wear be serious in end face, improves the service life and operating pressure of pump or motor.On the other hand, by
It in using sphere static pressure sliding plate auxiliary structure, is cancelled via lateral force a part that swash plate acts on plunger, another part is logical
The pivot pin for crossing setting sliding plate central axis is transferred on swash plate, so that acting on sliding plate along the lateral of vertical major axis direction
Component can be offset in sliding plate, without being further transferred in cylinder body via plunger, therefore cylinder body it is opposite with match
Inclination very little between flow table end face does not generate, to ensure that the validity of the oil film supporting of cylinder body and valve plate.
It, cannot the above content is specific optimal technical scheme further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to and these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, and all are not
Be detached from the spirit and scope of the utility model technical solution and and its improve, the right that should all cover in the utility model wants
It asks in range.
Claims (11)
1. a kind of sphere static pressure supports sliding plate auxiliary structure, it is characterised in that: the sliding plate auxiliary structure includes for providing bearing
Swash plate (40) and the sliding plate (50) being supported on swash plate (40), the sliding plate (50) are overall structure, sliding plate (50) court
The end face of cylinder body side is provided with multiple plunger ball-and-sockets (58), the sliding plate (50) end face opposed with swash plate (40) is provided with
Static-pressure supporting spherical (50a), the swash plate (40) end face opposed with sliding plate (50) have and static-pressure supporting spherical (50a) curvature
The identical Ball support face of radius, the static-pressure supporting spherical (50a) of the sliding plate (50) are supported on described in a manner of it can slide
The Ball support face of swash plate (40) is provided with connection plunger ball-and-socket (58) and static-pressure supporting spherical (50a) on the sliding plate (50)
Oil-through-hole (53), oil liquid introduces static-pressure supporting spherical (50a) and swash plate (40) of sliding plate (50) by the oil-through-hole (53)
Between Ball support face, the static pressure oil film for making the sliding plate (50) and swash plate (40) to form clearance fit is supported.
2. sphere static pressure according to claim 1 supports sliding plate auxiliary structure, it is characterised in that: the static pressure of the sliding plate (50)
Supporting spherical (50a) is equipped with multiple grease chambers (52), and the grease chamber (52) is that center compartment of terrain is distributed in sliding plate axle center (50C)
On static-pressure supporting spherical (50a), oil-through-hole (53) are provided between each grease chamber (52) bottom and corresponding plunger ball-and-socket (58),
Oil liquid is introduced the grease chamber (52) by the oil-through-hole (53), makes the static-pressure supporting spherical (50a) and swash plate (40) end face shape
It is supported at the static pressure oil film of clearance fit.
3. sphere static pressure according to claim 2 supports sliding plate auxiliary structure, it is characterised in that: the static-pressure supporting spherical
(50a) is the spherical surface boss face (51) extended on sliding plate (50), radially to swash plate (40) side, in the spherical surface boss face
(51) it is provided on multiple grease chambers (52), the grease chamber (52) is that center compartment of terrain is distributed in the ball with sliding plate axle center (50C)
In face boss face (51), it is provided with oil-through-hole (53) between each grease chamber (52) bottom and corresponding plunger ball-and-socket (58), it is described
Oil liquid is introduced the grease chamber (52) by oil-through-hole (53), and the end face of the spherical surface boss face (51) and swash plate (40) is made to form gap
The static pressure oil film of cooperation supports.
4. sphere static pressure according to claim 3 supports sliding plate auxiliary structure, it is characterised in that: in the spherical surface boss face
(51) sealing for sealing oil liquid is provided on, the sealing includes being arranged in the interior close of grease chamber (52) radially inner and outer side
Envelope portion (55) and outer seal portion (54), and the separation seal portion (56) being arranged between adjacent grease chamber (52).
5. sphere static pressure according to claim 4 supports sliding plate auxiliary structure, it is characterised in that: the ball in the sliding plate (50)
Face boss face (51) periphery is provided with multiple aiding support faces (510), and radial let out is provided between the aiding support face (510)
Oil groove (511) is provided with annular drain pan (512) between the aiding support face (510) and the outer seal portion (54), described
It is interconnected between radial drain pan (511) and annular drain pan (512).
6. sphere static pressure according to claim 2 supports sliding plate auxiliary structure, it is characterised in that: the oil-through-hole (53) or column
Plug centre bore (72) is arranged to damping hole or is provided with damper, and the damping hole or damper can make the oil pressure of grease chamber (52)
Change with external load and change, to form the hydrostatic support fed back with oil film pressure, so that the sliding plate (50) and swash plate (40)
Between gap be in relatively steady state always.
7. sphere static pressure according to claim 1 supports sliding plate auxiliary structure, it is characterised in that: the cunning in the sliding plate (50)
It is formed with the pin hole (513) of an opening at the dish axle heart (50C) on the end face opposed with swash plate (40), the sliding plate (50) and tiltedly
Pivot pin (43) are arranged in the central axle portion of disk (40), and the pivot pin (43) is inserted into the sliding plate in a manner of penetrating through the swash plate (40)
(50) it is slidably matched in pin hole (513) and with the sliding plate (50), the sliding plate (50) is relative to pivot pin (43) around itself
Axle center rotation.
8. sphere static pressure according to claim 1 supports sliding plate auxiliary structure, it is characterised in that: set on the sliding plate (50)
It is equipped with unloading oilhole (57) at least one perforation sliding plate (50), the two sides of sliding plate (50) are connected to by the oilhole (57) that unloads, described
Unloading oilhole (57) can lead to the oil liquid being trapped between sliding plate (50) and swash plate (40) in the chamber of shell.
9. a kind of includes the inclined disc type column of the bearing sliding plate auxiliary structure of sphere static pressure described in any one of claim 1 to 8
Plug pump or motor, including main shaft (10), shell (30), first bearing (21), second bearing (22), plunger (70), cylinder body (80),
In valve plate (90) and central spring (100), the spindle axis (10C) of the main shaft (10) and the cylinder body of the cylinder body (80)
The mandrel heart (80C) is overlapped, and described main shaft (10) one end is supported on first bearing (21), the other end penetrate through valve plate (90) and with
The cylinder body (80) is connected by key, and the cylinder body (80) is supported on second bearing (22) by cylinder sleeve (84), the plunger
(70) plunger ball (71) is fixed on the plunger ball-and-socket (58) of the sliding plate (50) and is slidably matched with plunger ball-and-socket (58),
The central spring (100) by sleeve (106) and steel ball (104) by the sliding plate (50) compression, the sliding plate (50) it is quiet
Hydraulic support spherical surface (50a) is supported on swash plate (40), and keeps being fitted close with the Ball support face of the swash plate (40), the master
Axis (10) and cylinder body (80) are in rotary work, in the supporting force of the swash plate (40) and the backhaul masterpiece of central spring (100)
Under, the plunger (70) moves reciprocatingly in the plunger cavity of cylinder body (80), realizes the suction oil work of pump or motor.
10. swash plate plunger pump according to claim 9 or motor, it is characterised in that: the plunger (70) includes band cone
The rod-plunger of shape structure, both ends are provided with one kind of the rod-plunger of bulb, spherical surface plunger with universal hinge, the plunger
(70) one end can be in the plunger hole (81) of cylinder body described in the mode borrowing that reciprocatingly slides of opposing cylinder (80), and the other end is with relatively sliding
Disk (50) end face is fixed on the plunger ball-and-socket (58) of the sliding plate (50) far from state that is limited and can fascinating.
11. swash plate plunger pump according to claim 9 or 10 or motor, it is characterised in that: the sliding plate (50) and tiltedly
Pivot pin (43) are arranged in the central axle portion of disk (40), one end of the pivot pin (43) by can in a manner of opposite slide valve (33a) sliding with
Slide valve (33a) connection, the hydraulic coupling of stroking mechanism drive the slide valve (33a) to move back and forth, and drive institute via pivot pin (43)
It states swash plate (40) and sliding plate (50) fascinates relative to pivot pin axle center (40C) and the intersection point of cylinder center axle center (80C), realize swash plate
The variable of formula plunger pump or motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820764350.9U CN208518828U (en) | 2018-05-22 | 2018-05-22 | A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820764350.9U CN208518828U (en) | 2018-05-22 | 2018-05-22 | A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure |
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| Publication Number | Publication Date |
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| CN208518828U true CN208518828U (en) | 2019-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820764350.9U Active CN208518828U (en) | 2018-05-22 | 2018-05-22 | A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure |
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| CN (1) | CN208518828U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110067855A (en) * | 2019-03-13 | 2019-07-30 | 钟彪 | A kind of hydraulic stepless speed change transmission device |
| CN110067718A (en) * | 2018-05-22 | 2019-07-30 | 钟彪 | A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure |
| CN110067715A (en) * | 2019-03-13 | 2019-07-30 | 钟彪 | A kind of flow sliding plate pair and plunger pump or motor comprising the structure |
| CN110107447A (en) * | 2019-06-24 | 2019-08-09 | 杭州力龙液压有限公司 | High and low speed switching device, hydraulic motor and excavator |
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2018
- 2018-05-22 CN CN201820764350.9U patent/CN208518828U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067718A (en) * | 2018-05-22 | 2019-07-30 | 钟彪 | A kind of sphere static pressure bearing sliding plate auxiliary structure and swash plate plunger pump or motor comprising the structure |
| CN110067855A (en) * | 2019-03-13 | 2019-07-30 | 钟彪 | A kind of hydraulic stepless speed change transmission device |
| CN110067715A (en) * | 2019-03-13 | 2019-07-30 | 钟彪 | A kind of flow sliding plate pair and plunger pump or motor comprising the structure |
| WO2020182204A1 (en) * | 2019-03-13 | 2020-09-17 | 青岛科而泰控股有限公司 | Hydraulic infinitely-variable speed transmission device |
| WO2020182199A1 (en) * | 2019-03-13 | 2020-09-17 | 青岛科而泰控股有限公司 | Flow-distributing sliding plate pair and piston pump or motor including said structure |
| CN110107447A (en) * | 2019-06-24 | 2019-08-09 | 杭州力龙液压有限公司 | High and low speed switching device, hydraulic motor and excavator |
| CN110107447B (en) * | 2019-06-24 | 2024-03-26 | 杭州力龙液压有限公司 | High-low speed switching device, hydraulic motor and excavator |
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Effective date of registration: 20231115 Address after: 610041 No. 6, D District, Tianfu Software Park, 599 Century City South Road, Chengdu High-tech Zone, Sichuan, China. Patentee after: CHENGDU ZHONGWU LIANCHUANG TECHNOLOGY CO.,LTD. Address before: 611130 room 11, 6 / F, unit 4, building 16, No. 66, middle section of Yangliu West Road, Liucheng, Wenjiang District, Chengdu, Sichuan Patentee before: Zhong Biao |
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Effective date of registration: 20240206 Address after: Room J9296, 7th Floor, Building 7, No. 328 Jiajian Road, Jiading District, Shanghai, 2018 Patentee after: Shanghai Qiangtian Drive Technology Co.,Ltd. Country or region after: China Address before: 610041 No. 6, D District, Tianfu Software Park, 599 Century City South Road, Chengdu High-tech Zone, Sichuan, China. Patentee before: CHENGDU ZHONGWU LIANCHUANG TECHNOLOGY CO.,LTD. Country or region before: China |
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