CN1090721C - Inclined plate type double speed hydraulic motor - Google Patents
Inclined plate type double speed hydraulic motor Download PDFInfo
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- CN1090721C CN1090721C CN96101700A CN96101700A CN1090721C CN 1090721 C CN1090721 C CN 1090721C CN 96101700 A CN96101700 A CN 96101700A CN 96101700 A CN96101700 A CN 96101700A CN 1090721 C CN1090721 C CN 1090721C
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- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 241000219098 Parthenocissus Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 241000231739 Rutilus rutilus Species 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
- Reciprocating Pumps (AREA)
Abstract
To provide a swash plate type two-speed hydraulic motor capable of maintaining a stable stroke displacement by seating a swash plate back surface in the inner wall surface of a casing in a surface contact condition and preventing contact between the seating surface intersecting line of the swash plate and the inner wall surface during rotating in an inclined manner. A positioning member 31 constitutes an inclined rotation center axial line O positioned below the inner wall surface of a casing 10 in the center of a sliding surface 31a having a fixed radius with the back surface side recess 22b of a swash plate 22. First and second seating surfaces 22c and 22d in the swash plate back side form an inclined rotational angle &alpha between each other, these are selectively brought into contact with a casting inner wall surface 12a, and with the first seating surface 22c seated in the inner wall surface of the casing, the second seating surface 22d is caused to be a surface, in which in an X-Y coordinate formed by an inclined rotation center axial line as an original point, an Y axis in parallel with an output rotational axis and a T axis orthogonal to this, when a distance between the T axis and the inner wall surface of the casing is X1 , coordinate variables x and y are represented by y=-x/tan&alpha -X1 /sin&alpha .
Description
The present invention is the invention relevant with inclined plate type double speed hydraulic motor, can realize that the switching (two-stage speed change) of two kinds of speed can be used as the walking drive motor of many endless-track vehicles for building when particularly making swash plate tilt to turn to two diverse locations.
Traditionally, forklift etc. is built with in the endless-track vehicle energetically, in order to allow crawler belt move, is equipped with the walking drive motor of a pair of driving sprocket wheel.This walking drive motor adopts the ramp type oil hydraulic motor that has retarder mostly.With this walking drive motor, shift the output that requires to have low-speed big under the occasion that needs again to be movably walking when action such as operation is carried out onto, the occasion that only is movably walking requires output at a high speed.When the tilt angle that changes swash plate piston rod lopsidedness face can be realized low speed and switching at a high speed constantly.
A kind of oil hydraulic motor that comes to this such as the fair 4-42550 communique record of spy.In this motor, the swash plate back side has formed first and second seating planes that intersect at a certain angle, by a pair of steel ball that the intersection area with two seating planes cooperates, makes swash plate back side concave surface portion be positioned at the inner wall part of motor casing.By above-mentioned a pair of steel ball, make swash plate do to tilt to rotate, so that one of above-mentioned first or second seating plane is supported on the internal face of motor casing around the inclination center of rotation axis vertical with rotary output axis.And the intersection line of above-mentioned first and second seating plane and above-mentioned inclination center of rotation axis are on the internal face of motor body (promptly on the supporting plane of two seating planes) simultaneously.
In addition, the record of opening in the flat 4-29430 communique (or the real 2-70675 of Yuanping City specification and drawing) is in fact: by a pair of steel ball that matches with swash plate back side concave surface portion, formed certain clearance between intersection line at the swash plate back side (the intersection line part that is equivalent to above-mentioned first and second seating plane) and the motor casing internal face, so just can prevent when swash plate tilts to rotate the wearing and tearing that produce between above-mentioned intersection line position and the motor casing internal face.
Also have, open in fact in the motor that flat 4-75162 communique (or specification and drawing of the real 2-119199 of Yuanping City number) recorded and narrated, adopted the oil cylinder that is arranged on around the cylinder block and moves along the rotary output axis direction.Also used above-mentioned steel ball to be positioned on the motor casing internal face as the inclination center of rotation axis of positioning element and swash plate in this motor, this point is identical with the motor that special fair 4-42550 communique is recorded and narrated.
However, in traditional inclined plate type double speed hydraulic motor of recording and narrating in special fair 4-42550 communique and the real openly 4-75162 communique, the inclination center of rotation axis of swash plate is positioned at the motor casing internal face and the invar ball only is used to the location, so have the gap between the swash plate concave spherical surface of steel ball and cooperation with it.Exist under the gapped state this, the intersection line position at the swash plate back side usually contacts with the motor casing internal face and interface pressure enlarges markedly when swash plate tilts to rotate, wearing and tearing have taken place the motor casing internal face, and having produced swash plate thus is that the problem that rotational velocity changes because of stroke and volume-variation is rotated, exported in the inclination of fulcrum with the position different with the inclination center of rotation axis of setting.
Open in traditional inclined plate type double speed hydraulic motor of putting down in writing in the flat 4-29430 communique real, though be provided with the gap between the swash plate back side and motor casing internal face, can solve above-mentioned because of wearing and tearing cause the stroke that the inclination rotating fulcrum changes and causes and the problem of volume-variation thereupon, but the mating part that constitutes the steel ball of fulcrum and swash plate just the face of swash plate and motor casing internal face contact segment press very high usually and easy wearing and tearing.And the swash plate back side is not to be face to contact bearing state with the motor casing internal face, has the problem that supporting is unstable, be easy to vibrate.
When the problem that the present invention exists in view of above-mentioned traditional inclined plate type double speed hydraulic motor, its purpose are that providing a kind of swash plate back side portion and motor casing internal face to be face contact bearing state and inclination rotation the intersection line position and the motor casing of swash plate supporting surface be contactless state, can keep stable stroke and volume, the little inclined plate type double speed hydraulic motor of vibration.
To achieve these goals, the technological scheme taked of the present invention is as follows:
The invention provides a kind of inclined plate type double speed hydraulic motor, wherein
Disposing some plungers, this plunger of installing in the cylinder block that rotary output axis reaches with rotary output axis rotates together in the motor casing rotates above-mentioned rotary output axis and cylinder block to its relative swash plate applied thrust; In the said motor housing, be provided with the positioning element of determining one side concave surface portion position, the above-mentioned swash plate back side, swash plate can rotate and the location around the inclination center of rotation axis vertical with rotary output axis, also be provided with separated by a distance with above-mentioned positioning element, match with above-mentioned swash plate and can make it the inclination device of rotation driving of rotation; On the position, the back side of above-mentioned swash plate, the both sides up and down of above-mentioned inclination center of rotation axis are provided with first and second supporting surface that can select the either party to cooperate with the motor casing internal face, can realize the switching of two kinds of rotating speeds when the tilt angle of above-mentioned swash plate changes; Be installed in a surname position parts in the said motor housing and have the slip outer circumferential face that concave surface portion slides mutually and radius is certain with the one side setting of the above-mentioned swash plate back side, the center by this slip outer circumferential face has constituted inclination center of rotation axis at said motor inner walls basifacial; When above-mentioned first supporting surface was in by said motor inner walls surface bearing state, second supporting surface can be used X-Y system of coordinates Chinese style y=-x/tg α-X
1/ Sin α represents that wherein in the X-Y system of coordinates, initial point is the center of above-mentioned inclination center of rotation axis, X-axis is parallel with above-mentioned rotary output axis, Y-axis is vertical with it and and above-mentioned internal face between distance be X
1
In addition, in order to make swash plate be in the stable support state, the intersection line of first and second supporting surface is being in bearing state one side and on said motor inner walls face the time, its apart from the side-play amount of X-axis by the inclined angle alpha of above-mentioned swash plate and by the distance X of this internal face to above-mentioned inclination center of rotation axis
1Definite fully.And positioning element can be above-mentioned formation inclination center of rotation axis and configuration at certain intervals several steel balls, also can be the cylindrical parts that is hemispherical parts or has certain axial length.
In the present invention, by the center of the slip place side face of positioning element certain radius and constituted and be positioned at the basifacial inclination center of rotation of motor casing inwall axis; Swash plate is done to walk around and is located at the concave surface position of the swash plate back side one side and the above-mentioned slip outer circumferential face sliding contact of positioning element when moving, and is surface contact state when being supported by the motor casing internal face one of in the first or second definite on demand supporting surface.In swash plate inclination rotation process, the intersection line of two supporting surfaces by on the motor casing internal face to cylinder block one side shifting, when being bearing on the motor casing internal face one of in two supporting surfaces, intersection line departs from inclination center of rotation axis and is positioned on the internal face of a side motor casing that is being supported.And the state when the swash plate back side one side is face contact and is bearing on the motor casing internal face is corresponding, and when swash plate was done to tilt to rotate, the intersection line position and the motor casing internal face of swash plate supporting surface were contactless state.
The invention effect has following good effect:
Because the swash plate back side one side is face with the internal face of motor casing and contacts holding state, and the intersection line and the motor casing internal face of its supporting surface were in contactless state when swash plate tilted to rotate, so according to the present invention, the stroke that face is pressed, maintenance is stable of swash plate supporting surface and the inclined plate type double speed hydraulic motor of volume in the time of can providing the wearing and tearing that can either reduce when tilting to rotate can reduce motor operations again.
Following with reference to accompanying drawing, embodiments of the invention are elaborated:
Fig. 1 is the inclined plate type double speed hydraulic motor embodiment's relevant with the present invention the axial sectional view of agent structure.
Fig. 2 is the local enlarged diagram in the swash plate supporting surface intersection area of present embodiment.
Swash plate halted state action principle schematic representation when Fig. 3 is present embodiment medium velocity 1.
Fig. 4 is in the present embodiment, swash plate state action principle figure in 1,2 handoff procedures of speed.
Swash plate halted state action principle schematic representation when Fig. 5 is this enforcement medium velocity 2.
Below, specify enforcement of the present invention with reference to the accompanying drawings.
Fig. 1 to Fig. 5 has represented that one of the inclined plate type double speed hydraulic motor relevant with the present invention is implemented part, and wherein Fig. 1 is the axial section schematic representation of its main structure.
Its composition at first is described.Among Fig. 1, the 10th, the motor casing parts are made up of the cover plate (be the port briquetting, do not draw among the figure) that bottom tube-like housing 11 and sealing tubular shell 11 open ends are arranged with bottom 12.In motor casing parts 10, installed and be provided with some parallel cylinder letters 14 cylinder block 15 of (only having represented a cylinder barrel among Fig. 1).Cylinder body 15 and rotary output axis 16 are supported in the housing parts 10 by bearing 17 and 18 with splined, and can freely rotate.Rotary output axis 16 links to each other with sprocket wheel by the retarder of not drawing among the figure, thus the caterpillar drive of driving track car.Be arranged in several cylinder barrels 14 in the cylinder block 15 and be separately installed with the plunger 19 that can be free to slide, the front end of plunger 19 is equipped with ball cup 21.Ball cup 21 is made up of some ball-head cover 21a and retainer 21b, the oval inclined-plane 22a of several balls headgear 21a and swash plate 22 is in the state of slipping, several plungers 19 slide with respect to swash plate 22 successively by ball cup 21, make cylinder block 15 and rotation output about 16 do rotation motion.For each plunger 19 orders are extruded, between the cover plate of housing parts 10 and cylinder block 15, be provided with synchronous plate 23.By this synchronous plate 23, when cylinder block 15 revolution, a pair of pressure that forms on above-mentioned plate is to one of the row's of giving path (seeing below) cylinder barrel 14 oil in the tow-away zone of being finished, and the cylinder barrel 14 in the meanwhile non-rotating district is by the oil outlet passage oil extraction.
Other direction, for as shown in Figure 2, (the right side of Fig. 1, the back side at swash plate 22, among Fig. 2, Fig. 3 at downside), formed on rotary output axis 16 Vertical direction (among Fig. 2, Fig. 3 with the paper Vertical direction) and decide a pair of concave spherical surface 22b (recess) of arranged spaced and the 1st supporting surface 22c and the second supporting surface 22d of mutual cross-over configuration on 12 the surperficial 12a (internal face) in the bottom by last.Two supporting surfaces form different angles with inclined plane part 22a respectively.The outer circumferential face 31a (slip surface) of the concave spherical surface 22b of swash plate 22 and a pair of steel ball 31 (position, back parts) certain radius freely is slidingly matched.Because this above-mentioned a pair of steel ball, be formed centrally the inclination center of rotation axis O vertical in respectively by each outer circumferential face 31a at the inwall of cylinder block 10 with rotary output axis 16, make swash plate 22 do to tilt to rotate and the location simultaneously around central axis O.And above-mentioned first and second the supporting surface 22c and the 22d that are arranged on central axis O both sides (left and right sides among Fig. 2) can combine with the surperficial 12a (internal face) of bottom 12 as required selectively.The inclination of swash plate 22 is rotated by being arranged on the oil cylinder 35 (driver part that tilts to rotate) of 31 one-tenth a distance of a pair of steel ball and is driven.This oil cylinder 35 has with the free slide 36 of the first supporting surface 22c of swash plate 22, the plunger 37 that can cooperate with slide 36 freely to rotate in any direction, the cylinder tube 38 that forms in the bottom 12 of motor table body component 10 and supplies with cylinder tube 38 with different pressures and press path 39 with the switching of the switch pressure of switch speed.When being supplied to the pressure oil of institute's level pressure power in the cylinder tube 38, plunger 37 jack-up swash plates 22 make the first supporting surface 22c leave end 12, the angle of inclination of its inclined-plane 22a changes, and plunger stroke and volume also change the purpose that (volume change) reaches speed change thereupon like this.
Here, for the mutual alignment relation of internal face 12c that inclination center of rotation axis O, bottom 12 are described and each supporting surface 22c, 22d, be that initial point is set the X-Y system of coordinates with central axis O.Wherein X-axis is parallel with rotary output axis 16, and its forward is the left direction of central axis O among Fig. 2, and Y-axis is vertical with rotary output axis 16, its forward be central axis O among Fig. 2 lower side to.
Below, for shown in Figure 2, ask the position of the second supporting surface 22d when the internal face 12a of the first supporting surface 22c and bottom 12 is in surface contact state with above-mentioned X-Y system of coordinates.
The intersection point of setting the second supporting surface 22d and steel ball 31 outer circumferential face 31a is that the internal face 12a of A, bottom 12 and the intersection point of steel ball 31 outer circumferential face 31a are A ' (for shown in Figure 2), and so, ∠ AOA ' is exactly an inclined angle alpha.If the position of the internal face 12a that makes bottom 12 after initial point O inhour is rotated angle [alpha] is decided to be the position of the second supporting surface 22d, then the 2nd supporting surface 22d clockwise rotates angle [alpha] around initial point O and just is in surface contact state with the internal face 12a of bottom 12.Like this, the second supporting surface 22d can carry out plane coordinate transformation and tries to achieve by the internal face 12a to bottom end 12.
Distance between X-axis and bottom 12 internal face 12a is X
1The time, then the point on the internal face 12a can be used (X
1, P) represent (P counts arbitrarily).Like this, the point on the second supporting surface 22d (X ', Y ') can represent by following relation:
Promptly
x’＝-X
1·cosα-P·sinα……①
y’＝-X
1·sinα+P·cosα……②
According to above-mentioned formula 1. with formula 2., try to achieve X ', the relation of Y ' is for down:
Y '=-x '/tan α-X
1/ sin α replaces X ' with X, Y here, and Y ' can get
Y=-x/tan α-X
1/ sin α ... 3. like this, the second supporting surface 22d can represent that its straight slope is by above-mentioned 3. formula in the projection equation of X-Y plane:
-1/tan α (=tan (α-pi/2)) X-axis is (parallel with the internal face 12a of bottom 12 because of X-axis with the angle of the second supporting surface 22d, so this angle is the internal face 12a of bottom and the angle of the second supporting surface 22d just) be exactly " α ", consistent with above-mentioned inclined angle alpha.
Below, partly be illustrated with regard to the intersection line of the first supporting surface 22c and the second supporting surface 22d.The intersection line of the first supporting surface 22c and the second supporting 22d (is K among Fig. 5 with putting a K on X-Y plane
1) coordinate represent that its coordinate values can be with above-mentioned formula 3. with X=-X
1Substitution is tried to achieve, and is (X
1,-X
1Tg (α/2)).Here angle [alpha]/2nd, above-mentioned K
1Point and the line OK of central axis O and the angle of X-axis.The coordinate of (the inclination rotary state of swash plate behind central axis O rotation angle) above-mentioned intersection line subpoint K (was K among Fig. 5 when in addition, the internal face 12a of the second supporting surface 22d and bottom 12 was in surface contact state
2) be (X
1,-X
1Tg (α/2)).When the first supporting surface 22c or the second supporting surface 22d contact with the internal face 12a of bottom 12 and put K and be positioned at internal face 12a and go up, the intersection line subpoint coordinate K of the first and second supporting surface 22c, 22d
1, K
2With central axis O apart from OK
1, OK
2Distance X greater than the internal face 12a and the central axis O of motor casing internal face bottom 12
1This is apart from OK
1, OK
2Available X
1/ cos (α/2) expression is fully by distance X
1Determine.When swash plate 22 is a fulcrum when tilt rotating with above-mentioned a pair of steel ball 31, the concave spherical surface 22b of swash plate 22 on the outer circumferential face 31a of steel ball 31, slides (for scheming shown in (a)-(c)).Meanwhile, the first supporting surface 22c and the intersection line subpoint K of the second supporting surface 22d in the Y-Y system of coordinates, depict the motion track similar to steel ball 31 outer circumferential face 31a (in Fig. 5, dot from K
1To K
2Track), its equation is: X
2+ Y
2{ X
1/ cos (α/2) }
2Along this track, some K leaves motor casing 10 internal face 12a towards cylinder block 15 1 side shiftings (its displacement distance is represented with S).When supporting surface 22c or 22d contacted with motor casing 10 wall 12a faces, intersection line subpoint K was Y in the lateral deviation decentre axes O distance of surface of contact
1This bias Y
1, be exactly above-mentioned seat village K
1Or (K
2) to the distance of X-axis, its value can be shown ash and be Y=X
1Tg (α/2).The intersection line subpoint K of the first supporting surface 22c and the second supporting surface 22d when one of above-mentioned two supporting surfaces contact with the internal face 12a of said motor housing 10 apart from the bias Y of central axis O
1Distance X less than the internal face 12a and the central axis O of motor casing 10
1In Fig. 5, ∠ OAK=∠ OA ' K.If the intersection point of line segment OA and internal face 12a is C, in Δ CKA and Δ COA ', because ∠ CKA=∠ CA ' is O, so ∠ ACK=∠ A ' CO is Δ CKA ∽ Δ COA '.If the elongation line y of the second supporting surface 22d projection line and the intersection point of X-axis are P, then ∠ APO=∠ AK
1A '=inclined angle alpha.
In Fig. 2,12b is that the bottom 12 of motor casing 10 is used to a pair of steel ball 31 is installed and the concave spherical surface of formation.Among Fig. 1 41 is the pressure springs that are configured in the cylinder block 15.Pressure spring 41 makes center adjustment piece 44 compress (as Fig. 1) all the time to the right by compressing tablet 42 and push rod 43, to guarantee the relative position of ball cup 21 and rotary output axis 16.(among the figure draw) formed a pair of pressure oil and given row path on the above-mentioned cover plate, respectively with figure on the control valve do not drawn be connected for the three position directional valve corresponding with the input operation position.When this three position directional valve mediated, oil pump and fuel tank (all drawing among the figure) and two row's of giving paths connected energy mutually, and other position is enterprising when being in, and the row's of giving path is communicated with oil pump, and then another is communicated with fuel tank.
Below, its operating principle is described.
In having the embodiment of the invention of said structure, when above-mentioned three position directional valve be in decide commutation position, as when being in the position of speed 1, feed speed switch pressure oil not in the oil cylinder 35, plunger 37 is in fully the state of rest of inserting in cylinder barrel 38, the first supporting surface 22c of swash plate 22 and bottom 12 tightly combine with surface contact state.At this moment the plane of inclination 22a of swash plate 22 is the position that is in the angle of internal friction maximum shown in Figure 1, the stroke of plunger 14 and volume-variation maximum.At this moment, if supplying with hydraulic pressure, above-mentioned oil pump gives the pressure oil cylinder body seat 15 of row's path institute flow setting type and the rotating speed 1 of rotary output axis 16 output low-speed bigs.Be equivalent to be in the even walking states of correspondence when pushing away operation at this state such as creeper truck.
On the other hand, when above-mentioned three position directional valve is in speed switching position such as speed 2 correspondences, just can be to oil cylinder 35 feed speed switch pressure oil.At this moment, plunger 37 is outwards moved by motor casing 10 bottoms 12 and jack-up swash plates 22 make it to rotate as shown in Figure 3, the tilt angle of rake 22a reduces, when second supporting surface shown in Fig. 3 c with after the surperficial 12a of bottom 12 contacts fully, the corresponding amount of the stroke of plunger 14 and volume reducing and inclined angle alpha, and reach minimum.At this moment, if above-mentioned oil pump is supplied with the pressure oil that hydraulic pressure is given row's path institute flow setting type, cylinder block 15 and rotary output axis 16 are exported at a high speed but the little rotating speed 2 of specific speed 1 moment of torsion.This state is equivalent to creeper truck and is in the non-loaded state that is movably walking.
Describe with regard to swash plate 22 inclination rotational action principles below.
In the present embodiment, the inclination center of rotation axis O that is positioned at motor casing 10 internal faces belows is that two central point lines by the certain slip outer circumferential face 31a of a pair of steel ball 31 radiuses constitute.When swash plate 22 tilts to rotate, the concave spherical surface 22b of its back side one side setting is in sliding mode with the slip outer circumferential face 31a of steel ball 31 respectively, (as Fig. 4, shown in Figure 5), the intersection line K of the first supporting surface 22c and the second supporting surface 22d from the bottom 12 surperficial 12a to cylinder block 15 1 side shiftings.Thereafter, when (determining) that surperficial 12a with bottom 12 is in surface contact state one of among the first supporting surface 22c or the second supporting surface 22d on demand, above-mentioned intersection line K more presses close to the surperficial 12a of the bottom 12 that is in first or second supporting surface and contacts than central axis O, and instrument thereon.Like this, state when the back side one side of swash plate 22 and motor casing internal face 12a are in face and contact is corresponding, swash plate 22 is when tilting to rotate, and first supporting surface 22c on the swash plate 22 and the intersection line K of the second supporting surface 22d and the bottom 12 of motor casing 10 are in contactless state.
As mentioned above, in the present embodiment, contact bearing state because swash plate 22 back sides one side is definite as required and make its internal face 12a with motor casing 10 bottoms 12 be face, so its bearing state is stable.Vibrate corresponding minimizing; In addition, when tilting to rotate owing to swash plate 22, the intersection line K of its supporting surface 22c and 22d and the surface of bottom 12 (motor casing internal face) 12a are in the roach contact condition, wear and tear mutually so can prevent it.Like this, not only can not produce impression in the bottom, and the inclination rotating fulcrum that can solve swash plate 22 changes, the stroke of motor and the problem that volume is difficult to obtain desired value, make the stroke of motor and volume can remain on respectively with speed 1 and speed 2 corresponding numerical value on.And, supported because the surperficial 12a of the back side one side of swash plate 22 and motor casing 10 bottoms 12 keeps solidly with surface contact state, so formed the inclined plate type double speed hydraulic motor that the bearing state stable vibration of swash plate 22 reduces.
Also have, in the present embodiment with a pair of steel ball 31 as positioning element, but also can with hard hemispherical parts or with the cylindrical parts of inclination center of rotation 15 axis coaxles, its quantity can be several.
Claims (1)
1, a kind of inclined plate type double speed hydraulic motor, dispose some plungers, this plunger of installing in the cylinder block that rotary output axis reaches with rotary output axis rotates together in the housing and above-mentioned rotary output axis and cylinder block rotated, it is characterized in that to its relative swash plate applied thrust:
In above-mentioned housing, be provided with the positioning element of determining one side concave surface portion position, the above-mentioned swash plate back side, swash plate can rotate and the location around the inclination center of rotation axis vertical with rotary output axis, also be provided with above-mentioned positioning element separated by a distance, match with above-mentioned swash plate and can make it the inclination device of rotation driving of rotation, on the position, the back side of above-mentioned swash plate, the both sides up and down of above-mentioned inclination center of rotation axis are provided with first and second supporting surface that can select the either party and cooperate with the internal face of housing, by changing the tilt angle of above-mentioned swash plate, can carry out the switching of two kinds of rotating speeds;
Be installed in positioning element in the above-mentioned housing and have the slip surface that concave surface portion slides mutually and radius is certain with the one side setting of the above-mentioned swash plate back side, the center by this slip surface has constituted inclination center of rotation axis at above-mentioned inner walls basifacial;
When above-mentioned first supporting surface was in by above-mentioned inner walls surface bearing state, second supporting surface can be used X-Y system of coordinates Chinese style y=-x/tg α-X
1/ sin α represents that wherein in the X-Y system of coordinates, initial point is the axle center of above-mentioned inclination center of rotation axis, X-axis be line of direction, the Y-axis parallel with above-mentioned rotary output axis be vertical with it line of direction and and above-mentioned internal face between distance be X
1
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7110588A JPH08303341A (en) | 1995-05-09 | 1995-05-09 | Swash plate type two-speed hydraulic motor |
| JP110588/95 | 1995-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1137617A CN1137617A (en) | 1996-12-11 |
| CN1090721C true CN1090721C (en) | 2002-09-11 |
Family
ID=14539668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96101700A Expired - Lifetime CN1090721C (en) | 1995-05-09 | 1996-03-29 | Inclined plate type double speed hydraulic motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH08303341A (en) |
| KR (1) | KR100387767B1 (en) |
| CN (1) | CN1090721C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102346663B1 (en) * | 2019-10-24 | 2022-01-04 | 주식회사 모트롤 | HYDRAULIC rotator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4738185A (en) * | 1985-08-09 | 1988-04-19 | Teijin Seiki Company Limited | Swash plate-type pump-motor |
| CN88210908U (en) * | 1988-03-26 | 1988-12-14 | 机械委济南铸造锻压机械研究所 | Rolling friction stroking mechanism of axial plunger pump |
-
1995
- 1995-05-09 JP JP7110588A patent/JPH08303341A/en active Pending
-
1996
- 1996-03-26 KR KR1019960008247A patent/KR100387767B1/en not_active IP Right Cessation
- 1996-03-29 CN CN96101700A patent/CN1090721C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4738185A (en) * | 1985-08-09 | 1988-04-19 | Teijin Seiki Company Limited | Swash plate-type pump-motor |
| CN88210908U (en) * | 1988-03-26 | 1988-12-14 | 机械委济南铸造锻压机械研究所 | Rolling friction stroking mechanism of axial plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08303341A (en) | 1996-11-19 |
| KR960041764A (en) | 1996-12-19 |
| CN1137617A (en) | 1996-12-11 |
| KR100387767B1 (en) | 2003-09-26 |
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