CN207998769U - Screed camber regulating mechanism based on hydraulic-driven - Google Patents
Screed camber regulating mechanism based on hydraulic-driven Download PDFInfo
- Publication number
- CN207998769U CN207998769U CN201721813166.0U CN201721813166U CN207998769U CN 207998769 U CN207998769 U CN 207998769U CN 201721813166 U CN201721813166 U CN 201721813166U CN 207998769 U CN207998769 U CN 207998769U
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- China
- Prior art keywords
- screed
- screw
- sprocket wheel
- pivoted housing
- double thread
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Abstract
The utility model is related to a kind of screed camber regulating mechanism based on hydraulic-driven, by being internally provided with two oppositely oriented internal threads in double thread pivoted housing, opposite with the two thread rotary orientations screw rod cooperation respectively of two screw threads, intermediate chain wheel rotation is driven by fluid-power motor, intermediate chain wheel drives left front sprocket wheel to rotate by drive chain, sprocket coaxiality is connected before left front sprocket wheel and the right side, preceding sprocket wheel and rear sprocket wheel keep rotating synchronously by driving chain, i.e. two double thread pivoted housings, which can synchronize, rotates in same direction, to realize that the camber of screed is adjusted.Relatively reliable compared to the camber regulating mechanism being fixedly mounted on screed, the case where not having de- chain, occurs;Compared to needing manually camber regulating mechanism, camber regulating mechanism in this hair utility model in real time can be adjusted screed camber in paving process, working efficiency higher reduces the chance that worker closely adjusts screed camber manually, advantageously to the safety of construction personnel.
Description
Technical field
The utility model belongs to paver technical field, more particularly to a kind of screed camber tune based on hydraulic-driven
Regulating device.
Background technology
The screed of paver generally comprises left frame and right rack, and the effect of camber regulating mechanism is to adjust screed
Angle between left frame and right rack.In view of the safety requirements of road surface drainage function and bend, different road pavement forms is wanted
Different screed cambers, the camber state of screed is asked to act directly on the road surface to pave, road pavement construction quality shadow
Sound is huge.Especially in thin layer paving process, the satisfy the need influence of face thickness and shape of roadbed injustice becomes apparent, to ensure to pave
Quality, need to frequently adjust camber to adapt to the variation of roadbed, the road surface for the high quality that can just pave out.Camber in original design is adjusted
Device, hydraulic motor are fixedly installed in left screed by support plate, when adjusting screed camber, left and right screed it
Between there is angle, to make big sprocket wheel and minor sprocket in the same plane, the case where taking off chain do not occur.
The existing manual camber regulating mechanism of screed is mostly that a pair of of mounting base is respectively set in left and right rack, each pair of
A hinged left-handed screw and right handed screw in mounting base, and be connected through a screw thread between two bars, it needs manually to rotate spiral shell respectively
The precession or back-out of bar achieve the purpose that adjust screed camber to change the angle between the rack of left and right.This adjusting side
Method, it is cumbersome, it is not only time-consuming and laborious, and be also less prone to reach construction requirement.
Invention content
The utility model provides a kind of existing hydraulic arch-adjusting machine of improvement to solve technical problem present in known technology
Structure is easy the defect of de- chain, simplifies the volume of camber regulating mechanism, and improve the working efficiency for adjusting screed camber based on
The screed camber regulating mechanism of hydraulic-driven.
The utility model is adopted the technical scheme that solve technical problem present in known technology:
A kind of screed camber regulating mechanism based on hydraulic-driven, it is left that screed camber regulating mechanism is mounted on screed
Between rack and the right rack of screed, screed left frame and the right rack of screed are hinged axis connection by rack, and feature exists
In:Including fluid-power motor, middle connecting plate, preceding connecting plate, rear connecting plate, left front axis pin, right front pin axis, left front screw rod, left back
Screw rod, preceding right-handed nut, rear right-handed nut, two preceding copper sheathings, copper sheathing after two, left front sprocket wheel, intermediate chain wheel, it is right before sprocket wheel,
Afterwards sprocket wheel, drive chain, driving chain, preceding double thread pivoted housing, rear double thread pivoted housing, right front screw, it is right after screw rod, two it is left-handed
Nut, left back axis pin, right rear pin shaft, sprocket wheel reducing sleeve, pressing plate, wherein preceding connecting plate one end is equipped with borehole structure, preceding double thread
Pivoted housing is installed in the borehole structure, and there are two preceding copper sheathing, preceding connecting plate is another for installation between preceding connecting plate and preceding double thread pivoted housing
One end is set there are two waist-shaped hole, and two waist-shaped holes are fixedly connected by screw bolt and nut with middle connecting plate one end, preceding double thread
The left end of pivoted housing is equipped with levogyrate inner thread hole, and the right end of preceding double thread pivoted housing is equipped with dextrorotation internal thread hole, left front screw rod and left back
Screw rod periphery is equipped with left hand thread, and screw rod periphery is equipped with right-handed thread after right front screw and the right side, and left front screw rod is with before
The screw-internal thread fit of double thread pivoted housing left end, and there are one left-handed nut, right front screw and preceding double threads for installation between the two
The screw-internal thread fit of pivoted housing right end, and installation between the two, there are one preceding right-handed nut, left front sprocket wheel passes through with sprocket wheel before the right side
Screw is fixedly and coaxially connected with preceding double thread pivoted housing, and left front axis pin is hinged with left front spiro rod rear end circular hole, before right front pin axis and the right side
The circular hole of spiro rod rear end is hinged;
Described rear connecting plate one end is equipped with borehole structure, and rear double thread pivoted housing is installed in the borehole structure, the two it
Between installation there are two rear copper sheathing, the rear connecting plate other end sets that there are two waist-shaped holes, and two waist-shaped holes are by screw bolt and nut in
Between the connecting plate other end be fixedly connected, the left end of rear double thread pivoted housing is equipped with levogyrate inner thread hole, the right end of rear double thread pivoted housing
Equipped with dextrorotation internal thread hole, the internal thread hole of left back screw rod and rear double thread pivoted housing left end coordinates, and is equipped between the two
One left-handed nut, it is right after the internal thread hole of screw rod and rear double thread pivoted housing right end coordinate, and between the two there are one installation
Right-handed nut afterwards, rear sprocket wheel are fixedly and coaxially connected by screw and rear double thread pivoted housing, and left back axis pin is justified with left back spiro rod rear end
Hole is hinged, and the circular hole of right rear pin shaft and spiro rod rear end behind the right side is hinged;
It is equipped with circular hole close to in-between position on the middle connecting plate, fluid-power motor is installed in circular hole, it is intermediate
Sprocket wheel is fixedly connected by sprocket wheel reducing sleeve and pressing plate with fluid-power motor output shaft, is equipped between intermediate chain wheel and left front sprocket wheel
Drive chain is equipped with driving chain between right preceding sprocket wheel and rear sprocket wheel;
It is equipped with two pairs of coaxially connected ears on the upside of screed left frame right end, two pairs are equipped on the upside of the right rack left end of screed together
Axis connection ear, left front axis pin and left back axis pin are hinged with two engaging lugs on screed left frame respectively, right front pin axis and the right side
Rear pin shaft is hinged with two pairs of engaging lugs in the right rack of screed respectively.
The utility model can also use following technical measures:
Further include scale mechanism, the scale mechanism include pointer slide bar, pointer, scale slide bar, scale, left screw,
Right screw, pointer are installed on pointer slide bar close to intermediate position, and scale upper side is equipped with equi-distance scale, and is installed on scale cunning
Bar centre position, pointer slide bar right end are equipped with circular hole, and left end is equipped with waist-shaped hole, and scale slide bar right end is equipped with waist-shaped hole, and left end is set
There are circular hole, the screw thread that left screw passes through the circular hole of scale slide bar left end and the waist-shaped hole and left back end part of pin shaft of pointer slide bar left end
Hole connects, the screw thread that right screw passes through the waist-shaped hole of scale slide bar right end and the circular hole and right rear pin shaft end of pointer slide bar right end
Hole connects.
The utility model has the advantages and positive effects of:The utility model is internally provided with two by double thread pivoted housing
Oppositely oriented internal thread, two screw threads opposite with two thread rotary orientations screw rod cooperation respectively, in being driven by fluid-power motor
Between sprocket wheel rotate, intermediate chain wheel drives left front sprocket wheel to rotate by drive chain, left front sprocket wheel and it is right before sprocket coaxiality be connected, it is right
Preceding sprocket wheel and rear sprocket wheel keep rotating synchronously by driving chain, i.e., two double thread pivoted housings, which can synchronize, rotates in same direction, to
Realize that the camber of screed is adjusted.It is relatively reliable compared to the camber regulating mechanism being fixedly mounted on screed, it does not have de-
The case where chain, occurs;Compared to needing manually camber regulating mechanism, the camber regulating mechanism in this hair utility model can be
Screed camber is adjusted in real time in paving process, working efficiency higher, reduces worker and closely adjust screed manually
The chance of camber, advantageously to the safety of construction personnel.
Description of the drawings
Fig. 1 is the utility model overall schematic;
Fig. 2 is the utility model exploded perspective view;
Fig. 3 is the explosive view of scale mechanism in the utility model;
Fig. 4 is that the utility model adjusts the left and right rack of screed, signal when screed centre position being made to raise up
Figure.
In figure:1, fluid-power motor;2.1, middle connecting plate;2.2, preceding connecting plate;2.3, rear connecting plate;3.1, left front pin
Axis;3.2, right front pin axis;4.1, left front screw rod;4.2, left back screw rod;5, left-handed nut;6.1, preceding copper sheathing;6.2, rear copper sheathing;
7, left front sprocket wheel;8, drive chain;9, driving chain;10.1, preceding double thread pivoted housing;10.2, rear double thread pivoted housing;11.1, in
Between sprocket wheel;11.2, sprocket wheel before the right side;11.3, rear sprocket wheel;12.1, right front screw;12.2, screw rod behind the right side;13.1, preceding right-handed nut;
13.2, rear right-handed nut;14.1, left back axis pin;14.2, right rear pin shaft;15, scale mechanism;15.1, pointer slide bar;15.2, refer to
Needle;15.3, scale slide bar;15.4, scale;15.5, left screw;15.6, right screw;16, rack articulated shaft;17, screed is right
Rack;18, screed left frame;19, sprocket wheel reducing sleeve, 20, pressing plate.
Specific implementation mode
For that can further appreciate that the invention, features and effects of the utility model, the following examples are hereby given, and coordinates
Detailed description are as follows for attached drawing:
It please refers to Fig.1 to Fig.4, a kind of screed camber regulating mechanism based on hydraulic-driven, screed camber adjusts dress
It sets between screed left frame 18 and the right rack of screed 17, screed left frame 18 and the right rack 17 of screed are logical
Cross the connection of rack articulated shaft 16, it is characterised in that:Including fluid-power motor 1, middle connecting plate 2.1, preceding connecting plate 2.2, rear connection
Plate 2.3, left front axis pin 3.1, right front pin axis 3.2, left front screw rod 4.1, left back screw rod 4.2, preceding right-handed nut 13.1, rear dextrorotation
Sprocket wheel before copper sheathing 6.2, left front sprocket wheel (big sprocket wheel) 7, intermediate chain wheel 11.1, the right side after 13.2, two, nut preceding copper sheathing 6.1, two
(minor sprocket) 11.2, rear sprocket wheel 11.3, drive chain 8, driving chain 9, preceding double thread pivoted housing 10.1, rear double thread pivoted housing
10.2,12.2, two left-handed nuts 5 of screw rod, left back axis pin 14.1, right rear pin shaft 14.2, chain rotation behind right front screw 12.1, the right side
Female connector 19, pressing plate 20, wherein preceding 2.2 one end of connecting plate is equipped with borehole structure, preceding double thread pivoted housing 10.1 is installed on the circular hole knot
In structure, there are two preceding copper sheathing 6.1,2.2 other ends of preceding connecting plate for installation between preceding connecting plate 2.2 and preceding double thread pivoted housing 10.1
If there are two waist-shaped hole, two waist-shaped holes are fixedly connected by screw bolt and nut with 2.1 one end of middle connecting plate, and preceding double thread turns
The left end of set 10.1 is equipped with levogyrate inner thread hole, and the right end of preceding double thread pivoted housing 10.1 is equipped with dextrorotation internal thread hole, left front screw rod
4.1 and 4.2 periphery of left back screw rod be equipped with left hand thread, right front screw 12.1 and it is right after 12.2 periphery of screw rod be equipped with the right side
Rotation screw thread, the screw-internal thread fit of left front screw rod 4.1 and preceding 10.1 left end of double thread pivoted housing, and between the two there are one installation
Left-handed nut 5, the screw-internal thread fit of right front screw 12.1 and preceding 10.1 right end of double thread pivoted housing, and it is equipped with one between the two
Sprocket wheel 11.2 passes through screw and the coaxial fixed company of preceding double thread pivoted housing 10.1 before a preceding right-handed nut 13.1, left front sprocket wheel 7 and the right side
It connects, left front axis pin 3.1 is hinged with 4.1 rear end circular hole of left front screw rod, and right front pin axis 3.2 and the circular hole of 12.1 rear end of right front screw are cut with scissors
It connects;
Described 2.3 one end of rear connecting plate is equipped with borehole structure, and rear double thread pivoted housing 10.2 is installed in the borehole structure,
Installation between the two is there are two rear copper sheathing 6.2, and 2.3 other end of rear connecting plate is set there are two waist-shaped hole, and two waist-shaped holes pass through spiral shell
Screw bolt and nut is fixedly connected with 2.1 other end of middle connecting plate, and the left end of rear double thread pivoted housing 10.2 is equipped with levogyrate inner thread hole,
The right end of double thread pivoted housing 10.2 is equipped with dextrorotation internal thread hole afterwards, and left back screw rod 4.2 is interior with rear 10.2 left end of double thread pivoted housing
Threaded hole coordinates, and left-handed nut 5 there are one installation between the two, screw rod 12.2 and rear 10.2 right end of double thread pivoted housing behind the right side
Internal thread hole cooperation, and installation between the two is there are one rear right-handed nut 13.2, rear sprocket wheel 11.3 pass through screw with it is rear double
Screw thread pivoted housing 10.2 is fixedly and coaxially connected, and left back axis pin 14.1 and 4.2 rear end circular hole of left back screw rod are hinged, right rear pin shaft 14.2 with
The circular hole of 12.2 rear end of screw rod is hinged behind the right side;
It is equipped with circular hole close to in-between position on the middle connecting plate 2.1, fluid-power motor 1 is installed in circular hole,
Intermediate chain wheel 11.1 is fixedly connected by sprocket wheel reducing sleeve 19 and pressing plate 20 with 1 output shaft of fluid-power motor, 11.1 He of intermediate chain wheel
Drive chain 8 is installed between left front sprocket wheel 7, driving chain 9 is installed between right preceding sprocket wheel 11.2 and rear sprocket wheel 11.3;
It is equipped with two pairs of coaxially connected ears on the upside of 18 right end of screed left frame, two are equipped on the upside of right 17 left end of rack of screed
To coaxially connected ear, left front axis pin 3.1 and left back axis pin 14.1 are hinged with two engaging lugs on screed left frame 18 respectively,
Right front pin axis 3.2 and right rear pin shaft 14.2 are hinged with two pairs of engaging lugs in the right rack of screed 17 respectively.
Further include scale mechanism 15, the scale mechanism includes pointer slide bar 15.1, pointer 15.2, scale slide bar
15.3, scale 15.4, left screw 15.5, right screw 15.6, pointer 15.2 are installed on the close intermediate position of pointer slide bar 15.1,
15.4 upper side of scale is equipped with equi-distance scale, and is installed on 15.3 centre position of scale slide bar, and 15.1 right end of pointer slide bar is equipped with
Circular hole, left end are equipped with waist-shaped hole, and 15.3 right end of scale slide bar is equipped with waist-shaped hole, and left end is equipped with circular hole, and left screw 15.5 passes through mark
The circular hole of 15.3 left end of ruler slide bar and the waist-shaped hole of pointer slide bar (15.1) left end and the threaded hole of 14.1 end of left back axis pin connect
It connects, circular hole and right rear pin shaft of the right screw 15.6 by 15.1 right end of waist-shaped hole and pointer slide bar of 15.3 right end of scale slide bar
The threaded hole of 14.2 ends connects.
The utility model is internally provided with two oppositely oriented internal threads by double thread pivoted housing, and two screw threads are respectively with two
The opposite screw rod cooperation of a thread rotary orientation, drives intermediate chain wheel rotation, intermediate chain wheel to pass through drive chain band by fluid-power motor
Dynamic left front sprocket wheel rotation, left front sprocket wheel are connected with sprocket coaxiality before the right side, and right preceding sprocket wheel and rear sprocket wheel are kept together by driving chain
Step rotation, i.e., two double thread pivoted housings, which can synchronize, rotates in same direction, to realize that the camber of screed is adjusted.Pacify compared to fixed
Camber regulating mechanism on screed is relatively reliable, and the case where not having de- chain occurs;Compared to needing manually camber
Regulating mechanism, the camber regulating mechanism in this hair utility model in real time can adjust screed camber in paving process
Section, working efficiency higher reduce the chance that worker closely adjusts screed camber manually, to the safety of construction personnel more added with
Profit.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is every according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
Claims (2)
1. a kind of screed camber regulating mechanism based on hydraulic-driven, screed camber regulating mechanism is mounted on the left machine of screed
Between frame (18) and the right rack of screed (17), screed left frame (18) and the right rack of screed (17) pass through rack articulated shaft
Connection, it is characterised in that:Including fluid-power motor (1), middle connecting plate (2.1), preceding connecting plate (2.2), rear connecting plate (2.3),
Left front axis pin (3.1), right front pin axis (3.2), left front screw rod (4.1), left back screw rod (4.2), preceding right-handed nut (13.1), rear right
Spin nut (13.2), two preceding copper sheathings (6.1), copper sheathing (6.2) after two, left front sprocket wheel (7), intermediate chain wheel (11.1), it is right before
Sprocket wheel (11.2), rear sprocket wheel (11.3), drive chain (8), driving chain (9), preceding double thread pivoted housing (10.1), rear double thread turn
It is sold behind screw rod (12.2), two left-handed nuts (5), left back axis pin (14.1), the right side behind set (10.2), right front screw (12.1), the right side
Axis (14.2), sprocket wheel reducing sleeve (19), pressing plate (20), wherein preceding connecting plate (2.2) one end is equipped with borehole structure, preceding double thread turns
Set (10.1) is installed in the borehole structure, and installation is there are two before between preceding connecting plate (2.2) and preceding double thread pivoted housing (10.1)
Copper sheathing (6.1), preceding connecting plate (2.2) other end are set there are two waist-shaped hole, and two waist-shaped holes are connected by screw bolt and nut and centre
Fishplate bar (2.1) one end is fixedly connected, and the left end of preceding double thread pivoted housing (10.1) is equipped with levogyrate inner thread hole, preceding double thread pivoted housing
(10.1) right end is equipped with dextrorotation internal thread hole, and left front screw rod (4.1) and left back screw rod (4.2) periphery are equipped with left-handed spiral shell
Screw rod (12.2) periphery is equipped with right-handed thread, left front screw rod (4.1) and preceding double thread behind line, right front screw (12.1) and the right side
The screw-internal thread fit of pivoted housing (10.1) left end, and installation between the two is there are one left-handed nut (5), right front screw (12.1) with
The screw-internal thread fit of preceding double thread pivoted housing (10.1) right end, and there are one preceding right-handed nuts (13.1) for installation between the two, it is left
Sprocket wheel (11.2) is fixedly and coaxially connected by screw and preceding double thread pivoted housing (10.1) before preceding sprocket wheel (7) and the right side, left front axis pin
(3.1) hinged with left front screw rod (4.1) rear end circular hole, right front pin axis (3.2) and the circular hole of right front screw (12.1) rear end are hinged;
Described rear connecting plate (2.3) one end is equipped with borehole structure, and rear double thread pivoted housing (10.2) is installed in the borehole structure,
Installation between the two is there are two rear copper sheathing (6.2), and rear connecting plate (2.3) other end is set there are two waist-shaped hole, and two waist-shaped holes are logical
It crosses screw bolt and nut to be fixedly connected with middle connecting plate (2.1) other end, the left end of rear double thread pivoted housing (10.2) is equipped with left-handed
The right end of internal thread hole, rear double thread pivoted housing (10.2) is equipped with dextrorotation internal thread hole, left back screw rod (4.2) and rear double thread pivoted housing
(10.2) internal thread hole of left end coordinates, and left-handed nut (5) there are one installation between the two, and screw rod (12.2) is with after behind the right side
The internal thread hole of double thread pivoted housing (10.2) right end coordinates, and rear right-handed nut (13.2) there are one installation between the two, after
Sprocket wheel (11.3) is fixedly and coaxially connected by screw and rear double thread pivoted housing (10.2), left back axis pin (14.1) and left back screw rod
(4.2) rear end circular hole is hinged, and right rear pin shaft (14.2) and the circular hole of screw rod (12.2) rear end behind the right side are hinged;
It is equipped with circular hole close to in-between position on the middle connecting plate (2.1), fluid-power motor (1) is installed in circular hole,
Intermediate chain wheel (11.1) is fixedly connected by sprocket wheel reducing sleeve (19) and pressing plate (20) with fluid-power motor (1) output shaft, intermediate chain
Drive chain (8) is installed between wheel (11.1) and left front sprocket wheel (7), is pacified between right preceding sprocket wheel (11.2) and rear sprocket wheel (11.3)
Equipped with driving chain (9);
It is equipped with two pairs of coaxially connected ears on the upside of screed left frame (18) right end, two are equipped on the upside of the right rack of screed (17) left end
To coaxially connected ear, left front axis pin (3.1) and left back axis pin (14.1) are connect with two on screed left frame (18) respectively
Ear is hinged, and right front pin axis (3.2) and right rear pin shaft (14.2) are hinged with two pairs of engaging lugs in the right rack of screed (17) respectively.
2. the screed camber regulating mechanism according to claim 1 based on hydraulic-driven, it is characterised in that:It further include mark
Ruler mechanism (15), the scale mechanism include pointer slide bar (15.1), pointer (15.2), scale slide bar (15.3), scale
(15.4), left screw (15.5), right screw (15.6), pointer (15.2) are installed on pointer slide bar (15.1) close to intermediate position
It sets, scale (15.4) upper side is equipped with equi-distance scale, and is installed on scale slide bar (15.3) centre position, pointer slide bar (15.1)
Right end is equipped with circular hole, and left end is equipped with waist-shaped hole, and scale slide bar (15.3) right end is equipped with waist-shaped hole, and left end is equipped with circular hole, left screw
(15.5) pass through the waist-shaped hole of the circular hole of scale slide bar (15.3) left end and pointer slide bar (15.1) left end and left back axis pin
(14.1) the threaded hole connection of end, the waist-shaped hole and pointer slide bar that right screw (15.6) passes through scale slide bar (15.3) right end
(15.1) circular hole of right end is connect with the threaded hole of right rear pin shaft (14.2) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813166.0U CN207998769U (en) | 2017-12-21 | 2017-12-21 | Screed camber regulating mechanism based on hydraulic-driven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813166.0U CN207998769U (en) | 2017-12-21 | 2017-12-21 | Screed camber regulating mechanism based on hydraulic-driven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207998769U true CN207998769U (en) | 2018-10-23 |
Family
ID=63835883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721813166.0U Active CN207998769U (en) | 2017-12-21 | 2017-12-21 | Screed camber regulating mechanism based on hydraulic-driven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207998769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974902A (en) * | 2017-12-21 | 2018-05-01 | 天津工程机械研究院有限公司 | Screed camber regulating mechanism based on hydraulic-driven |
-
2017
- 2017-12-21 CN CN201721813166.0U patent/CN207998769U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974902A (en) * | 2017-12-21 | 2018-05-01 | 天津工程机械研究院有限公司 | Screed camber regulating mechanism based on hydraulic-driven |
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