CN202971033U - Hydraulic motor and travel driving device with same - Google Patents
Hydraulic motor and travel driving device with same Download PDFInfo
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- CN202971033U CN202971033U CN 201220673761 CN201220673761U CN202971033U CN 202971033 U CN202971033 U CN 202971033U CN 201220673761 CN201220673761 CN 201220673761 CN 201220673761 U CN201220673761 U CN 201220673761U CN 202971033 U CN202971033 U CN 202971033U
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Abstract
The utility model relates to a hydraulic motor comprising a cylinder assembled by a shell, a close cover and a cylinder cover. One side of the cylinder is fixedly provided with an oil circulation plate; an oil distribution structure is arranged in the oil circulation plate; a crankshaft is supported in the cylinder through a bearing; the cylinder is internally provided with a plurality of plunger cavities; and each plunger cavity is internally provided with a plunger. The hydraulic motor is characterized in that the plungers are circumferentially limited on an eccentric bushing of the crankshaft through snap rings; the bottom surfaces of the plungers are in contact with the peripheral surface of the eccentric bushing; spherical seats are fixed in the plunger cavities; spherical cylinders are arranged in the spherical seats; the peripheral surfaces of the spherical cylinders are in spherical surface contact with the inner circumferential walls of the spherical seats; and the plungers pass through the spherical cylinders and can vertically move. The plungers are in spherical surface contact with the spherical seats through the spherical cylinders sleeved on the plungers, and the structure can ensure that the spherical cylinders enable the axes of the plungers to automatically align to the axis of the eccentric bushing at any rotating angle of the crankshaft, so that the lateral pressure of the plungers to the plunger cavities is eliminated, and the motor can have high bearing capability under the action of high pressure and can reliably work under the condition of high-speed rotation.
Description
Technical field
The utility model relates to a kind of oil hydraulic motor, also relates to a kind of travel driving unit with oil hydraulic motor, and it is a kind of shell drive unit of changing one's profession away, and it is mainly used in wheeled or caterpillar engineering vehicles, as excavator, winch, bulldozer, loader etc.
Background technique
the curved shaft type oil hydraulic motor generally includes housing, the cylinder cap that is connected with housing seal and capping, bent axle, logical food tray, join oily structure, plunger, have a plurality of plunger cavities in housing, logical food tray is fixed on a side of housing, join oily structure and be positioned at logical food tray, joining oily structure divides again planar oil distributing structure (oil distribution casing is joined oil) and axle to join oily structure (oil distributing shaft is joined oil), plunger cavity is odd number, be evenly distributed on radially respectively on the circumference of housing, plunger in plunger cavity is connected with the bulb phase ball-joint on connecting rod top, the cylndrical surface of connecting rod bottom contacts with the eccentric bushing in bent axle, the shaft core position of connecting rod has the oil duct that axially runs through, d-axis in bent axle is bearing in housing and capping by bearing, in bent axle, an end of d-axis is connected with oil distribution casing by double-end key, the other end of d-axis is used for being with dynamic load to rotate.During use, when pressure oil enters into the housing inner chamber of plunger body top by the runner of logical food tray in oil distribution casing or oil distributing shaft, housing, the action of hydraulic force that pressure oil produces is in the plunger body top, this hydraulic coupling resolves into along the connecting rod center line and points to the power at crank throw center of bent axle and the lateral force that the plunger cavity wall is produced, the former tangential force produces moment of torsion to the rotating center of bent axle, make bent axle around its rotating center rotation, realization is mechanical energy with hydraulic energy transfer, reaches the purpose of output speed and moment of torsion.
It is the Chinese utility model patent " crank shaft-connection-lever type hydraulic " of ZL03231170.2 (notification number is CN2622454Y) as a patent No., the patent No. is the Chinese utility model patent " crank shaft-connection-lever type hydraulic " of ZL200620105572.7 (notification number is CN2924113Y), and the patent No. is that the Chinese utility model patent " end face compensation oil distribution crank connecting link type hydraulic motor " of ZL98224223.9 (notification number is CN2336123Y) has just disclosed so similar hydraulic motor structure.
the plunger of existing curved shaft type oil hydraulic motor constrains in plunger cavity and can only straight up and down move, fully contact and be provided with seal ring between plunger periphery and plunger cavity inner circle wall and form oil seal, be sliding friction between plunger and plunger cavity, due to oil hydraulic motor in the course of the work, plunger is not absolute straight up and down motion, have certain skew, there is larger lateral pressure in plunger to the plunger cavity sidewall, the frictional force of plunger in movement process and between plunger cavity is larger, the reliability of motor is lower, affect the mechanical efficiency of oil hydraulic motor, running speed and volumetric efficiency.
Domestic existing engineering truck such as excavator, winch, bulldozer, loader etc. are furnished with exposed walking speed reducing driving device, travel driving unit is driven by oil hydraulic motor, existing travel driving unit is scarcely from band brake, thereby do not have a braking function, but adopt separately an arrestment mechanism, and break separates with travel driving unit and uses and install, and cost is high, fitting operation is inconvenient, especially cisco unity malfunction under slope and mal-condition, braking easily malfunctioning, accident frequency is high.
A kind of travel driving unit that there is no brake portion as the patent No. Chinese utility model patent " planet speed reducer for bridge crane " that is ZL200820023058.8 (notification number is CN201218307Y) has disclosed.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of plunger of eliminating to the oil hydraulic motor of the lateral pressure of cylinder body for above-mentioned prior art present situation, guarantees that oil hydraulic motor has higher bearing capacity and High Rotation Speed reliable operation under High Pressure.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of oil hydraulic motor, comprise the cylinder body that is assembled by housing, capping and cylinder cap, one side of cylinder body is fixed with logical food tray, be provided with in logical food tray and join oily structure, there is bent axle to be bearing in cylinder body by bearing, one end of bent axle with join oily structure driven and be connected, the other end of bent axle stretches out the opposite side of cylinder body as output terminal, have radial uniform plunger cavity on the circumferencial direction of a plurality of eccentric bushings at bent axle in cylinder body, be equipped with plunger in each plunger cavity; It is characterized in that: described plunger is circumferentially spacing on the eccentric bushing of bent axle by snap ring, the bottom surface of plunger contacts with the eccentric bushing outer circumferential face, be fixed with spheric seating in described plunger cavity, be provided with the sphere cylinder body in spheric seating, between this sphere cylinder body outer circumferential face and spheric seating inner circle wall, for spherical contacts, described plunger passes the sphere cylinder body and can move up and down.
Be provided with the first seal ring sealing between the inner peripheral surface of above-mentioned sphere cylinder body and the outer circumferential face of plunger, be provided with the second seal ring sealing between the outer circumferential face of described spheric seating and plunger cavity inner circle wall.Seal ring is set prevents relatively large the letting out to the housing inner chamber of high pressure oil in plunger cavity, reduce the leakage of high pressure oil, elevating mechanism efficient.
Above-mentioned plunger has opening up cavity, form oil storage space between the bottom surface of plunger and eccentric bushing side face, the bottom of described cavity has the damp channel that is communicated with cavity and oil storage space, contacts for sphere-contact or arc surface between plunger bottom surface and eccentric bushing outer circumferential face.Hydraulic oil in plunger cavity has part to enter in the bottom surface of plunger and the oil storage space between the eccentric bushing side face by damp channel like this, this part hydraulic oil can flow between plunger and eccentric bushing lubrication, set up the static balance oil film, prevent from producing between plunger and eccentric bushing the Metal Contact wearing and tearing; Damping hole is set in addition can guarantees that high pressure oil can not enter the bottom surface of connecting rod and the place, mating face of eccentric bushing fast after the damping hole damping, plunger can not lifted by hydraulic oil, guarantees the oil hydraulic motor smooth working.
It is above-mentioned that to join oily structure be the planar oil distributing structure, comprise oil distribution casing and join oily side plate, described oily side plate and the logical food tray of joining fixed by bolt and housing side, joining simultaneously oily side plate is located between logical food tray and housing side, one end of described bent axle is connected with oil distribution casing by transmission shaft, so that the rotation of bent axle can drive the oil distribution casing rotation, the oil duct on logical food tray is selected to be communicated with each plunger cavity by oil distribution casing and the runner of joining on oily side plate.
Also be provided with auxiliary oil distribution casing and wavy spring in above-mentioned logical food tray, described wavy spring acts on auxiliary oil distribution casing and oil distribution casing, joins oily side plate trend so that oil distribution casing keeps compressing.By the effect of wavy spring, oil distribution casing keep to be compressed join oily side plate trend, be conducive to the raising of oil hydraulic motor volumetric efficiency and heat-resistant deforming preferably.Adopt end-face compensate to join oily structure, reduce the leakage loss that flow becomes face, motor is worked under the low speed also can keep higher volumetric efficiency and mechanical efficiency, be conducive to improve low-speed stability and the braking of motor.The simultaneously effect of wavy spring and auxiliary oil distribution casing has the auto-compensation effect to wearing and tearing and the thermal distortion on flow surface, when improving plot ratio, also extremely acts on for the High Rotation Speed of motor prevents calorie, greatly improves the operating life of oil distribution casing.
a kind of travel driving unit with aforementioned hydraulic motor, comprise support, wheel disc and gear ring, wheel disc and gear ring are fixed together and are bearing in by bearing on the outer circumferential face of support, the gear ring outer end is provided with the capping sealing, also being provided with in support can be around the spline housing of self axis rotation, be provided with the third-level planetary transmission group in described gear ring, the wheel shaft of the one-level sun gear in the third-level planetary transmission group insert in spline housing and with the spline housing spline joint, one-level sun gear and the engagement of one-level planet wheel, the one-level planet wheel meshes with gear ring simultaneously, secondary solar gear spline joint on output ring gear on primary planet carrier and the coaxial wheel shaft that is arranged on the one-level sun gear, secondary solar gear and the engagement of secondary planet wheel, the secondary planet wheel meshes with gear ring simultaneously, three grades of sun gear spline joints on output ring gear on the secondary planet frame and the coaxial wheel shaft that is arranged on the one-level sun gear, three grades of sun gears and the engagement of third-level planetary wheel, the third-level planetary wheel meshes with gear ring simultaneously, third-level planetary frame and support are fixed, it is characterized in that: described cylinder body is positioned at support, housing in cylinder body is fixed by the outer side surface of bolt and support, stretch in spline housing and by keyway arrangements as the part of output terminal in bent axle and be connected with spline housing, so that the rotation of bent axle can drive the spline housing rotation, the periphery of spline housing is arranged with multi-disc movable friction plate and the static friction sheet that the each interval stack arranges, movable friction plate is relative with the support endoporus fixing, static friction sheet and spline housing are fixing can be rotated with spline housing, also be provided with the piston with axial step through hole in described support, described movable friction plate and static friction sheet are between third-level planetary frame and piston, form liquid sealing between the periphery of piston and rack inner wall, the outer end of piston is processed with a plurality of mounting holes, be provided with the spring that makes piston keep pressing friction sheet trend in each mounting hole, form oil pocket between the outer terrace of described piston and the inner baffle shoulder of support endoporus, be processed with the oilhole that communicates with described oil pocket on described support.
This travel driving unit is placed in oil hydraulic motor in support, make overall structure more small and exquisite, have additional brake portion in travel driving unit in addition, under vehicle stop state, piston is pressed together each movable friction plate and static friction sheet under spring action, stop the relative support of spline housing around self axis rotation, realize braking; This brake structure is reasonable in design, and is large for the installing space of each friction plate, realizes that the quantity that increases friction plate increases braking torque, strengthened running mechanism Parking stability on gradient inclined-plane, thereby the work deadweight tonnage of running mechanism is improved; Because braking torque increases, provide condition for increasing input power, thereby realized larger wheel disc output torque, the application on winch improves elevator pulling force weight greatly, and the braking Parking is reliable.
The outer end of above-mentioned spring is pushed down by disk, and the outside of disk is by being located at the hole retainer ring spacing in the support endoporus.This limit method is simple in structure and easy for installation.
Above-mentioned third-level planetary frame is fixed with pad on the exterior edge face, and the static friction sheet of described innermost end can contact with this pad, and the movable friction plate of described outermost end can contact with the inner end of piston.
Be provided with block between adjacent two sun gears in above-mentioned third-level planetary transmission group.The sun gear of block between can adjacent two-stage is set directly contacts because of play, guarantee the stability of third-level planetary transmission group transmission.
In above-mentioned third-level planetary transmission group, the rear and front end of each planet wheel is provided with the planet back-up ring.The planet back-up ring is set prevents planet wheel axial float in the course of the work, guarantee the stability of third-level planetary transmission group transmission.
Compared with prior art, the utility model has the advantage of: plunger contacts with spheric seating spherical hinge chain by sheathed sphere cylinder body on it, this structure guarantees under any angle that bent axle rotates, the sphere cylinder body can make axis and the eccentric bushing axle center auto-alignment of plunger, thereby eliminate plunger to the lateral pressure of plunger cavity, guarantee motor higher bearing capacity and High Rotation Speed reliable operation under High Pressure; Become the static rolling friction from original sliding friction between plunger and eccentric bushing surface of contact in addition, greatly reduce the plunger frictional heat, improve the working efficiency of motor and the reliability of motor operations, motor running speed is improved, increase transmitted power.
Description of drawings
Fig. 1 is the utility model oil hydraulic motor embodiment's structure sectional view;
Fig. 2 is the utility model travel driving unit embodiment's structure sectional view.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, be a preferred embodiment of the utility model oil hydraulic motor.
a kind of oil hydraulic motor, comprise by housing 16, the cylinder body that capping 17 and cylinder cap 18 are assembled, one side of cylinder body is fixed with logical food tray 19, logical food tray 19 has oil inlet passage and oil discharge passage, be provided with in logical food tray 19 and join oily structure, there is bent axle 20 to be bearing in cylinder body by bearing 21, one end of bent axle 20 with join oily structure driven and be connected, the other end of bent axle 20 stretches out the opposite side of cylinder body as output terminal, has radial uniform plunger cavity 22 on the circumferencial direction of a plurality of eccentric bushings 21 at bent axle in cylinder body, eccentric bushing 21 is set on the eccentric position of bent axle, be equipped with plunger 23 in each plunger cavity 22.It is more than the conventional structure of oil hydraulic motor.
joining oily structure is the planar oil distributing structure, comprise oil distribution casing 30 and join oily side plate 31, oil distribution casing 30 and runner design how much the setting according to the plunger case number of joining on oily side plate 31, it joins the conventional design of oily structure for oil hydraulic motor, joining oily side plate 31 and logical food tray 19 fixes by bolt 32 and housing 16 sides, joining simultaneously oily side plate 31 is located between logical food tray 19 and housing 16 sides, one end of bent axle 20 is connected with oil distribution casing 30 by transmission shaft 33, so that the rotation of bent axle 20 can drive oil distribution casing 30 rotations, oil duct on logical food tray 19 is selected to be communicated with each plunger cavity 22 by oil distribution casing 30 and the runner of joining on oily side plate 31.
Also be provided with auxiliary oil distribution casing 34 and wavy spring 35 in logical food tray 19, wavy spring 35 acts on auxiliary oil distribution casing 34 and oil distribution casing 30, joins oily side plate 31 trend so that oil distribution casing 30 keeps compressing.
Plunger is by sheathed sphere cylinder body and spheric seating sphere-contact on it, this structure guarantees under any angle that bent axle rotates, the sphere cylinder body can make axis and the eccentric bushing axle center auto-alignment of plunger, thereby eliminate plunger to the lateral pressure of plunger cavity, guarantee motor higher bearing capacity and High Rotation Speed reliable operation under High Pressure; Become the static rolling friction from original sliding friction between plunger and eccentric bushing surface of contact in addition, greatly reduce the plunger frictional heat, improve the working efficiency of motor and the reliability of motor operations, motor running speed is improved, increase transmitted power.
As shown in Figure 2, be a preferred embodiment of travel driving unit.
A kind of travel driving unit with aforementioned hydraulic motor, include support 1, wheel disc 2 and gear ring 3, wheel disc 2 and gear ring 3 are fixed together and are bearing in by bearing 10 on the outer circumferential face of support 1, gear ring 3 outer ends are provided with capping 31 sealings, also being provided with in support 1 can be around the spline housing 4 of self axis rotation, and this spline housing 4 can be by oil hydraulic motor or motor driving rotation.Cylinder body is positioned at support 1, housing 16 in cylinder body is fixed by bolt 36 and the outer side surface of support 1, part as output terminal in bent axle 20 stretches in spline housing 4 and is connected with spline housing 4 by keyway arrangements, so that the rotation of bent axle 20 can drive spline housing 4 rotations.
be provided with the third-level planetary transmission group in gear ring 3, the wheel shaft of one-level sun gear 5a in the third-level planetary transmission group insert in spline housing 4 and with spline housing 4 spline joints, one-level sun gear 5a and one-level planet wheel 9a engagement, one-level planet wheel 9a meshes with gear ring 3 simultaneously, secondary solar gear 5b spline joint on output ring gear on primary planet carrier 6a and the coaxial wheel shaft that is arranged on one-level sun gear 5a, secondary solar gear 5b and secondary planet wheel 9b engagement, secondary planet wheel 9b meshes with gear ring 3 simultaneously, three grades of sun gear 5c spline joints on output ring gear on secondary planet frame 6b and the coaxial wheel shaft that is arranged on one-level sun gear 5a, three grades of sun gear 5c and third-level planetary wheel 9c engagement, third-level planetary wheel 9c meshes with gear ring 3 simultaneously, third-level planetary frame 6c and support 1 are fixing.
Be provided with block 14 between adjacent two sun gears in the third-level planetary transmission group.In the third-level planetary transmission group, the rear and front end of each planet wheel is provided with planet back-up ring 15.
The periphery of spline housing 4 is arranged with multi-disc movable friction plate 7a and the static friction sheet 7b that the each interval stack arranges, movable friction plate 7a is relative fixing with support 1 endoporus, static friction sheet 7b and spline housing 4 are fixing can be with spline housing 4 rotations, also be provided with the piston 8 with axial step through hole in support 1, movable friction plate 7a and static friction sheet 7b are between third-level planetary frame 6c and piston 8, third-level planetary frame 6c is fixed with pad 13 on the exterior edge face, the static friction sheet 7b of innermost end can contact with this pad 13, and the movable friction plate 7a of outermost end can contact with the inner end of piston 8.
Be provided with the seal ring sealing between piston 8 periphery walls and support 1 inner hole wall, the outer end of piston 8 is processed with a plurality of mounting holes 81, be provided with the spring 82 that makes piston 8 keep pressing friction sheet trend in each mounting hole 81, the outer end of spring 82 is pushed down by disk 84, and the outside of disk 84 is spacing with back-up ring 12 by the hole of being located in support 1 endoporus.Form oil pocket 83 between the inner baffle shoulder of the outer terrace of piston 8 and support 1 endoporus, be processed with the oilhole 11 that communicates with described oil pocket 83 on support 1.
transmission process: oil hydraulic motor drives spline housing 4 rotations, spline housing 4 drives one-level sun gear 5a rotation, one-level sun gear 5a drives one-level planet wheel 9a rotation, one-level planet wheel 9a with transmitting torque to gear ring 3, one-level planet wheel 9a drives again primary planet carrier 6a rotation simultaneously, primary planet carrier 6a drives secondary solar gear 5b rotation by the output ring gear on it, secondary solar gear 5b drives secondary planet wheel 9b rotation, secondary planet wheel 9b with transmitting torque to gear ring 3, secondary planet wheel 9b drives again secondary planet frame 6b rotation simultaneously, secondary planet frame 6b drives three grades of sun gear 5c rotations by the output ring gear on it, three grades of sun gear 5c drive third-level planetary wheel 9c rotation, third-level planetary wheel 9c simultaneously with transmitting torque to gear ring 3 and third-level planetary frame 6c, because third-level planetary frame 6c and support 1 is fixing, according to the Gear Planet Transmission principle, gear ring 3 runnings this moment.
Braking process: under vehicle stop state, piston 8 is pressed together each movable friction plate 7a and static friction sheet 7b under spring 82 effects, stops the relative support 1 of spline housing 4 around self axis rotation, realizes braking; During releasing, hydraulic oil enters oil pocket 83 by oilhole 11, will push away before piston 8, and each friction plate loses pressure, and loosening between multi-disc movable friction plate 7a and static friction sheet 7b, spline housing 4 can rotate freely.
This brake structure is reasonable in design, and is large for the installing space of each friction plate, realizes that the quantity that increases friction plate increases braking torque, strengthened running mechanism Parking stability on gradient inclined-plane, thereby the work deadweight tonnage of running mechanism is improved; Because braking torque increases, provide condition for increasing input power, thereby realized larger wheel disc output torque, the application on winch improves elevator pulling force weight greatly, and the braking Parking is reliable.
Claims (10)
1. oil hydraulic motor, comprise by housing (16), the cylinder body that capping (17) and cylinder cap (18) are assembled, one side of cylinder body is fixed with logical food tray (19), be provided with in logical food tray (19) and join oily structure, there is bent axle (20) to be bearing in cylinder body by bearing (21), one end of bent axle (20) with join oily structure driven and be connected, the other end of bent axle (20) stretches out the opposite side of cylinder body as output terminal, has radial uniform plunger cavity (22) on the circumferencial direction of a plurality of eccentric bushings at bent axle (21) in cylinder body, be equipped with plunger (23) in each plunger cavity (22), it is characterized in that: described plunger (23) is by on the circumferential spacing eccentric bushing at bent axle (21) of snap ring (24), the bottom surface of plunger (23) contacts with eccentric bushing (21) outer circumferential face, be fixed with spheric seating (25) in described plunger cavity (22), be provided with sphere cylinder body (26) in spheric seating (25), between this sphere cylinder body (26) outer circumferential face and spheric seating (25) inner circle wall, for spherical contacts, described plunger (23) passes sphere cylinder body (26) and can move up and down.
2. oil hydraulic motor according to claim 1, it is characterized in that: be provided with the first seal ring (27) sealing between the outer circumferential face of the inner peripheral surface of described sphere cylinder body (26) and plunger (23), be provided with the second seal ring (28) sealing between the outer circumferential face of described spheric seating (25) and plunger cavity (22) inner circle wall.
3. oil hydraulic motor according to claim 1, it is characterized in that: described plunger (23) has opening up cavity (231), form oil storage space (29) between the bottom surface of plunger (23) and eccentric bushing (25) side face, the bottom of described cavity (231) has the damp channel (232) that is communicated with cavity (231) and oil storage space (29), contacts for sphere-contact or arc surface between plunger (23) bottom surface and eccentric bushing (21) outer circumferential face.
4. oil hydraulic motor according to claim 1, it is characterized in that: described to join oily structure be the planar oil distributing structure, comprise oil distribution casing (30) and join oily side plate (31), described oily side plate (31) and the logical food tray (19) of joining fixed by bolt (32) and housing (16) side, joining simultaneously oily side plate (31) is located between logical food tray (19) and housing (16) side, one end of described bent axle (20) is connected with oil distribution casing (30) by transmission shaft (33), so that the rotation of bent axle (20) can drive oil distribution casing (30) rotation, oil duct on logical food tray (19) is communicated with each plunger cavity (22) selection by oil distribution casing (30) and the runner of joining on oily side plate (31).
5. oil hydraulic motor according to claim 4, it is characterized in that: also be provided with auxiliary oil distribution casing (34) and wavy spring (35) in described logical food tray (19), described wavy spring (35) acts on auxiliary oil distribution casing (34) and oil distribution casing (30), joins oily side plate (31) trend so that oil distribution casing (30) keeps compressing.
6. travel driving unit with the described oil hydraulic motor of aforementioned arbitrary claim, comprise support (1), wheel disc (2) and gear ring (3), wheel disc (2) and gear ring (3) are fixed together and pass through bearing (10) and be bearing on the outer circumferential face of support (1), gear ring (3) outer end is provided with capping (31) sealing, also being provided with in support (1) can be around the spline housing (4) of self axis rotation, described gear ring is provided with the third-level planetary transmission group in (3), the wheel shaft of the one-level sun gear (5a) in the third-level planetary transmission group insert in spline housing (4) and with spline housing (4) spline joint, one-level sun gear (5a) and one-level planet wheel (9a) engagement, one-level planet wheel (9a) meshes with gear ring (3) simultaneously, secondary solar gear (5b) spline joint on output ring gear on primary planet carrier (6a) and the coaxial wheel shaft that is arranged on one-level sun gear (5a), secondary solar gear (5b) and secondary planet wheel (9b) engagement, secondary planet wheel (9b) meshes with gear ring (3) simultaneously, three grades of sun gears (5c) spline joint on output ring gear on secondary planet frame (6b) and the coaxial wheel shaft that is arranged on one-level sun gear (5a), three grades of sun gears (5c) and third-level planetary wheel (9c) engagement, third-level planetary wheel (9c) meshes with gear ring (3) simultaneously, third-level planetary frame (6c) is fixing with support (1), it is characterized in that:
Described cylinder body is positioned at support (1), housing in cylinder body (16) is fixed by bolt (36) and the outer side surface of support (1), part as output terminal in bent axle (20) stretches in described spline housing (4) and is connected with spline housing (4) by keyway arrangements, so that the rotation of bent axle (20) can drive spline housing (4) rotation;
the periphery of described spline housing (4) is arranged with multi-disc movable friction plate (7a) and the static friction sheet (7b) that the each interval stack arranges, movable friction plate (7a) is relative fixing with support (1) endoporus, static friction sheet (7b) can rotate with spline housing (4) with spline housing (4) is fixing, also be provided with the piston (8) with axial step through hole in described support (1), described movable friction plate (7a) and static friction sheet (7b) are positioned between third-level planetary frame (6c) and piston (8), form liquid sealing between the periphery of piston (8) and support (1) inwall, the outer end of piston (8) is processed with a plurality of mounting holes (81), be provided with the spring (82) that makes piston (8) keep pressing friction sheet trend in each mounting hole (81), form oil pocket (83) between the inner baffle shoulder of the outer terrace of described piston (8) and support (1) endoporus, be processed with the oilhole (11) that communicates with described oil pocket (83) on described support (1).
7. travel driving unit according to claim 6, it is characterized in that: the outer end of described spring (82) is pushed down by disk (84), and the outside of disk (84) is spacing with back-up ring (12) by the hole of being located in support (1) endoporus.
8. travel driving unit according to claim 6, it is characterized in that: described third-level planetary frame (6c) is fixed with pad (13) on the exterior edge face, the static friction sheet (7b) of described innermost end can contact with this pad (13), and the movable friction plate of described outermost end (7a) can contact with the inner end of piston (8).
9. travel driving unit according to claim 6 is characterized in that: be provided with block (14) between adjacent two sun gears in described third-level planetary transmission group.
10. travel driving unit according to claim 6, it is characterized in that: in described third-level planetary transmission group, the rear and front end of each planet wheel is provided with planet back-up ring (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673761 CN202971033U (en) | 2012-12-04 | 2012-12-04 | Hydraulic motor and travel driving device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673761 CN202971033U (en) | 2012-12-04 | 2012-12-04 | Hydraulic motor and travel driving device with same |
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| Publication Number | Publication Date |
|---|---|
| CN202971033U true CN202971033U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220673761 Expired - Fee Related CN202971033U (en) | 2012-12-04 | 2012-12-04 | Hydraulic motor and travel driving device with same |
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| CN (1) | CN202971033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016247A (en) * | 2012-12-04 | 2013-04-03 | 宁波德辰液压科技有限公司 | Hydraulic motor and walking actuating device with hydraulic motor |
-
2012
- 2012-12-04 CN CN 201220673761 patent/CN202971033U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016247A (en) * | 2012-12-04 | 2013-04-03 | 宁波德辰液压科技有限公司 | Hydraulic motor and walking actuating device with hydraulic motor |
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