CN202016817U - Hydraulic winch - Google Patents
Hydraulic winch Download PDFInfo
- Publication number
- CN202016817U CN202016817U CN2011200789902U CN201120078990U CN202016817U CN 202016817 U CN202016817 U CN 202016817U CN 2011200789902 U CN2011200789902 U CN 2011200789902U CN 201120078990 U CN201120078990 U CN 201120078990U CN 202016817 U CN202016817 U CN 202016817U
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- clutch
- piston
- hydraulic
- bolster
- brake
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Abstract
The utility model relates to a hydraulic winch. The hydraulic winch comprises a machine frame, a winding barrel, a hydraulic motor, and a hydraulic brake, a planet gear speed reducer and a hydraulic clutch which are arranged in the winding barrel, wherein the hydraulic clutch comprises an outer barrel, a clutch friction plate and a clutch oil cylinder; a bearing shaft is fixed on the machine frame; the outer barrel and a piston of the clutch oil cylinder are fixed on the bearing shaft through bearings respectively; and the piston is in transmission connection with the output end of a planet carrier of the planet gear speed reducer. The outer barrel and the piston are fixed on the bearing shaft, so that the outer barrel, the piston and the bearing shaft have higher coaxiality, and a dynamical friction plate and a static friction plate which are arranged on the outer barrel and the piston respectively have higher parallelism; and the dynamical friction plate and the static friction plate can be well contacted with each other and can be completely separated from each other, so that the hydraulic winch has more stable and reliable clutch performance, and the abrasion and the heat radiation of the clutch friction plate are reduced. In the hydraulic winch, transmission efficiency and operational reliability can be improved, and service life can be prolonged; and the hydraulic winch has a simplified integral structure and higher machining and assembling manufacturability.
Description
Technical field
The utility model relates to a kind of winch of Wound steel rope, especially relates to a kind of hydraulic wireline winch.
Background technology
For solving the hydraulic wireline winch draw bail complicated processing difficulty of band power-transfer clutch, the dynamical axis that hydraulic wireline winch exists be subjected to force unbalance, bearing axial pushing force and can't realize the modular problem of clutch components on the frame, the utility model people has proposed the technology of " transmission last level has the hydraulic wireline winch of power-transfer clutch " (Granted publication CN 101190770 B) by name, show a kind of dynamical axis stress balance, simple in structure, the transmission last level of processing and easy accessibility has the hydraulic wireline winch of power-transfer clutch, it is by HM Hydraulic Motor, hydraulic brake, epicyclic reduction gear, hydraulic clutch, reel and the hydraulic control circuit of controlling its work are formed, be arranged on the end that the interior hydraulic clutch of reel is in system's messenger chain, epicyclic reduction gear is arranged in the reel, the right side mouth of its final stage pinion carrier is exactly the castellated shaft that connects multi-plate friction clutch, the right-hand member of castellated shaft is exactly the piston of clutch control oil cylinder, the pinion carrier of its epicyclic reduction gear and the castellated shaft of power-transfer clutch and the integrated structure of piston.This granted patent has solved the force unbalance that is subjected to of existing hydraulic wireline winch draw bail complexity, processing and assembling difficulty and dynamical axis effectively, and frame is subjected to axial force to cause junction to be worn and torn easily, the problem that mechanical efficiency is low and service life is short; In long-term production practice and use, find that it still comes with some shortcomings: at first be that urceolus is fixedly mounted on the reel, and castellated shaft is fixedly mounted in the retarder, make urceolus and castellated shaft be difficult to obtain higher right alignment, decide friction lining and the movable friction plate be located on both are difficult to obtain higher parallelism, thereby influence performance of clutch, make easier heating of clutch-lining and wearing and tearing, have a strong impact on the service life of winch; Next is that the castellated shaft and the final stage pinion carrier of power-transfer clutch are that integral structure, the other end are enclosed within on the oil-guiding shaft, this integral structure, castellated shaft is axially stretched out than strong point in the state of suspending, this end end that suspends does not have radial location, because the accumulation of each messenger chain Mismachining tolerance, make the axle center of power-transfer clutch castellated shaft axle center and reel have bigger coaxiality deviation, thereby easily produce bigger beating in the running, further reduced the parallelism of deciding friction lining and movable friction plate on the castellated shaft; Once more, because there is bigger radial runout in power-transfer clutch castellated shaft in running condition, the oil transportation cover and the sealing between the oil-guiding shaft that cause control clutch to open and close are very fragile, and produce the problem of leakage of oil; In addition, limit by structure, have processing and the relatively poor problem of assembly process process.
Summary of the invention
The utility model main purpose provides that friction lining is decided in a kind of clutch and movable friction plate has higher parallelism, can reduce the clutch friction plate wearing and tearing, the power-transfer clutch performance is better, reliability is higher, longer service life, the more stable hydraulic wireline winch of operation.
Another purpose of the utility model provides a kind of more compact structure, be easier to the hydraulic wireline winch that assembles and process.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: a kind of hydraulic wireline winch, comprise reel, the HM Hydraulic Motor of frame, Wound steel rope, and be located at hydraulic brake, epicyclic reduction gear and hydraulic clutch in the reel; Described hydraulic clutch comprises urceolus, clutch friction plate and the clutch oil cylinder that drives the clutch friction plate clutch; Described clutch oil cylinder comprises cylinder body, piston and dish spring, it is characterized in that: be fixed with bolster on the described frame; Described urceolus, piston respectively by bearing fixing on this bolster, urceolus, piston and the coaxial setting of bolster three; The pinion carrier mouth formation of this piston left end and epicyclic reduction gear is in transmission connection; Described reel one end is fixed in urceolus, the other end by on the sheathed shell that is supported on hydraulic brake of bearing.Urceolus is by the middle part of bearing fixing at this bolster; The right-hand member of piston is a hollow and by the end of bearing fixing in this bolster, and the pinion carrier mouth of left end and epicyclic reduction gear constitutes and is in transmission connection; This urceolus and piston all are fixed in the structure on the bolster, make urceolus and piston be easy to have higher right alignment, be located at the movable friction plate on urceolus and the piston respectively and decide friction lining and also have higher parallelism, make movable friction plate and decide friction lining to obtain excellent contact, make disengaging performance more reliable and more stable; Because movable friction plate and decide friction lining and contact well, when power-transfer clutch unlatching disconnection transmission, movable friction plate with decide friction lining and can break away from fully, thereby can reduce the wearing and tearing and the heating of clutch friction plate, prolong its service life; In addition, obtain in power-transfer clutch reliability and service life to significantly improve, the work capacity and the maintenance cost of maintenance and replacing clutch friction plate can significantly be reduced; This structure decrease wearing and tearing and vibration, and can improve driving efficiency, functional reliability and service life, and integral structure is simplified, volume reduces, material reduces, the technique effects such as good manufacturability processing and assemble; In addition, because bolster is fixed on the frame, so vibrations, impact during the power-transfer clutch running, all directly transfer on the frame by bolster, but not on the reel, the running of reel is shaken, the influence impacted is less, thereby improved the stability of reel operation.In addition, this structure has been utilized the inner space of reel fully, makes integral structure compact more.
In order to strengthen the radial location of piston, as preferably, be provided with oil ring between described piston and the piston, this oil ring and bolster, piston constitute sliding bearing structure.Oil ring and bolster, piston constitute a secondary plain bearing, this plain bearing and antifriction-bearing box constitute the radial location of piston jointly, the radial location precision of piston is largely increased, improved piston and urceolus, the right alignment of bolster when running work thus, thus the parallelism that has improved movable friction plate and decided friction lining.In addition, the setting of oil ring, as connecting device, the oil duct of both being convenient to bolster and piston is processed between bolster and piston, in the time of can causing leaking wearing and tearing occurring again, only needs the replacing oil ring to get final product, thereby avoids changing the situation of bolster and piston.
In order to reduce the influence of retarder mouth to piston spline axle head, as preferably, the piston left end shaft is to extending into spline shaft structure, and constitutes spline with this axle head and pinion carrier and be connected; The tooth of this castellated shaft is an involute gear profile.This spline is connected to float and connects, and makes the right alignment requirement between pinion carrier and the piston lower, is beneficial to manufacturing, assembling; The more important thing is, in whole messenger chain, because the morpheme error during various transmission parts are made, and cause the problem that has bigger malalignment between the transmission mouth of drg and planetary reduction gear and the power-transfer clutch, can connect by the spline that floats and solve.
As preferably, the right-hand member excircle of described urceolus is provided with lateral wall, and the reel right-hand member is fixedly connected on the lateral wall, and the outer rim of lateral wall protrudes from the outer circumference surface of reel.This structure, lateral wall both provided good fixing for reel, again can be the time around the volume steel rope as the inhibiting device of steel rope; Therefore, do not need to be provided with special steel rope position limiting structure on the reel, thus, simplified the structure of reel.
As preferably, be provided with sidewall in the middle part of the described cylinder body, this sidewall and piston space are provided with the clutch oil pocket, and bolster is provided with the clutch oil duct that feeds this clutch oil pocket.When injecting hydraulic oil by the clutch oil duct in the clutch oil pocket, cylinder body moves and the compact disc spring, makes the movable friction plate of power-transfer clutch and decide friction lining and separates, the messenger chain disconnection that power-transfer clutch is interior; When the power-transfer clutch oil pocket was discharged hydraulic oil, cylinder body moved until resetting under the application force of dish spring, made the movable friction plate of power-transfer clutch and decide friction lining to contact, and the messenger chain of power-transfer clutch reconnects; Establish the oil duct of control clutch on bolster, oil channel structure is simple, also is convenient to the outside oil pipe of laying.For ease of the processing of oil duct be connected, as preferably, be arranged with oil ring on the described bolster, the inner groove that this oil ring is provided with outer groove, communicate with clutch oil duct port and be connected outer groove and the oil guiding hole of inner groove, inner groove, outer groove lay respectively on the inside and outside circumference of oil ring and are circular groove.
As preferably, described hydraulic brake comprises shell, braking main shaft, brake strip, disc brake spring, and the brake piston that can be resisted against the brake strip sidewall; Be provided with brake chamber B between brake piston middle part and shell, shell is provided with the braking oil duct that feeds this braking oil pocket B.This brake structure, braking is reliable, more compact structure.
In order further to improve integrally-built compactness, integrally-built intensity, as preferably, be provided with stopper tab in the described shell, this stopper tab one sidewall and brake strip offsets, another sidewall is provided with surface bearing and constitute with this surface bearing and pinion carrier and to be in transmission connection.This structure, with pinion carrier directly and hydraulic brake integrated, by the axial limiting of surface bearing as pinion carrier, thereby simplified the structure of epicyclic reduction gear, make the integrated level of hydraulic brake and epicyclic reduction gear higher, reduced the volume of drg and retarder, made drg and retarder be easier to be built in reel.
As preferably, the left end of sun wheel of described epicyclic reduction gear extends to axle, and this axle is provided with spline and constitutes with the braking main shaft with this spline and is in transmission connection.This structure, simple in structure, reliable, especially further simplified integral structure.
As preferably, described urceolus right-hand member is provided with gear ring, this gear ring and the coaxial setting of bolster; Described bolster is fixedly connected with right support, and right support is provided with rotating shaft, and rotating shaft is provided with and the gear ring gears in mesh.Gear ring, rotating shaft and reel are synchronized with the movement, and thus, can measure the rotating speed of reel by rotating shaft; Gear ring, this velocity measurement mechanisms of rotating shaft, simple, test the speed convenient and reliable.Gear ring and urceolus are convenient to the processing of profile of tooth for dividing body structure.
For the ease of the assembling of gear ring, as preferably, the right-hand member of described urceolus is provided with madial wall, and on bolster, madial wall is provided with boss to madial wall by bearing fixing, and gear ring is fixed on this boss.This structure, gear ring can have smaller volume, and required installing space is also less.
Existing reel is an end standard-sized sheet mouth, the semi-enclosed structure of the other end, semiclosed end has the sidewall of inside extension more, and the existence of this sidewall has limited the retarder in the reel, the assembly manipulation space of power-transfer clutch, therefore as preferred, described reel connects the tube structure at two ends for the equal diameter endoporus.This structure, the reel two ends are full open type, for the parts in the reel provide bigger operational space.
In sum, the utlity model has following beneficial effect:
1, urceolus and piston all by bearing fixing on bolster, make urceolus and piston have higher right alignment, thereby make movable friction plate and decide friction lining and have higher parallelism and obtain excellent contact, make the disengaging performance of power-transfer clutch more reliable and more stable;
2, adopt the unsteady type of attachment of involute teeth between planetary reduction gear and the piston, messenger chain is solved because of making the morpheme error problem that produces, reduced thus each driving parts accuracy requirement, improved the fabrication properties of each part, thereby reduced manufacturing cost, can also improve driving efficiency, reliability and service life simultaneously;
3, adopted oil ring and piston, bolster to constitute the structure of a secondary plain bearing, this plain bearing and bearing constitute the radial location of piston jointly, improved piston and urceolus, the right alignment of bolster when running work further, thus the parallelism that has further improved movable friction plate and decided friction lining;
4, vibrations, the impact in power-transfer clutch when running all can directly be transferred on the frame by bolster, and the influence that the running of reel is hit is less, thereby has improved the stability of reel operation;
5, urceolus and piston have all utilized the inner space of reel fully by the structure of bearing fixing on bolster, make integral structure compact more;
6, have higher hydraulic brake of integrated level and reducer structure, simplified the axial limiting structure of epicyclic reduction gear, saved the reel inner space;
7, the reel structure of the complete open type in two ends makes power-transfer clutch, retarder, drg in the reel that bigger assembly manipulation space arranged, and makes it to be easier to Assembly ﹠Disassembly.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is a kind of structural representations of oil ring.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of hydraulic wireline winch of the utility model, as shown in Figure 1, it comprises reel 13, HM Hydraulic Motor 20, the fluid control piece 1 of frame, Wound steel rope, and is located at hydraulic brake, epicyclic reduction gear 4 and hydraulic clutch in the reel 13.
Hydraulic clutch comprises urceolus 11, decides friction lining 10, movable friction plate 9 and the clutch oil cylinder that drives two friction plate clutch, and clutch oil cylinder comprises cylinder body 12, piston 7 and dish spring 14.Cylinder body 12 middle parts are provided with sidewall, and 7 in this sidewall and piston are provided with clutch oil pocket A.Dish spring 14 is fixed on the piston 7 by block 15.
Be fixed with bolster 17 on the frame, this bolster 17 and urceolus 11, the coaxial setting of piston 7 threes, urceolus 11 is fixed on the middle part of this bolster 17 by bearing 16, the right-hand member of piston 7 is hollow and is provided with spline and constitutes spline with this spline with pinion carrier 5 mouths of epicyclic reduction gear 4 by end, left end that bearing 21 is sheathed on this bolster 17 and be connected, this spline is connected to float and connects, and this spline is an invoice serration; Reel 13 1 ends are fixed in urceolus 11, the other end is supported on the shell 29 of hydraulic brake by bearing 3.The interstitial hole left end of piston 7 is provided with end cover 6.
Be provided with oil ring 22 between bolster 17 and the piston 7, oil ring 22 is a flush fit with bolster 17, and constitutes sliding bearing structure with bolster 17.
As shown in Figure 2, the inner groove 221 that oil ring 22 is provided with outer groove 222, communicate with clutch oil duct L port and be connected outer groove 222 and the oil guiding hole L1 of inner groove 221, inner groove 221, outer groove 222 lay respectively on the inside and outside circumference of oil ring 22 and are circular groove.
Frame comprises left socle 2, right support 19, and the shell 29 of hydraulic brake is fixed in left socle 2, and bolster 17 is fixed in right support 19.
Hydraulic brake comprises shell 29, braking main shaft 28, brake strip 26, disc brake spring 27, and the brake piston 36 that can be resisted against brake strip 26 sidewalls; 29 on brake piston 36 middle parts and shell are provided with brake chamber B, and shell 29 is provided with the braking oil duct p4 that feeds this braking oil pocket B.Be provided with stopper tab 25 in the shell 29, this stopper tab 25 1 sidewalls and brake strip 26 offsets, another sidewall is provided with surface bearing 24 and constitute with pinion carrier 5 with this surface bearing 24 and to be in transmission connection.Sun wheel 38 left ends of epicyclic reduction gear 4 extend to axle, and this axle is provided with spline and is in transmission connection with this spline and braking main shaft 28 formations.Disc brake spring 27 is located between brake piston 36, the drg end cap 37 compressiblely.
Urceolus 11 right-hand members are provided with gear ring 24, this gear ring 24 and bolster 17 coaxial settings; Described bolster 17 is fixedly connected with right support 19, and right support 19 is provided with rotating shaft 18, and rotating shaft 18 is provided with and gear ring 24 gears in meshs 23.The right-hand member of urceolus 11 is provided with madial wall 132, and madial wall 132 is fixed on the bolster 17 by bearing 16, and madial wall 132 is provided with boss, and gear ring 24 is fixed on this boss.
Wait term position about as herein described, direction is the direction shown in the accompanying drawing 1.
Claims (10)
1. a hydraulic wireline winch comprises reel (13), the HM Hydraulic Motor (20) of frame, Wound steel rope, and is located at hydraulic brake, epicyclic reduction gear (4) and hydraulic clutch in the reel (13); Described hydraulic clutch comprises urceolus (11), clutch friction plate and the clutch oil cylinder that drives the clutch friction plate clutch; Described clutch oil cylinder comprises cylinder body (12), piston (7) and dish spring (14), it is characterized in that: be fixed with bolster (17) on the described frame; Described urceolus (11), piston (7) are fixed on the bolster (17) by bearing (16), bearing (21) respectively, the coaxial setting of three; Pinion carrier (5) the mouth formation of described piston (7) left end and epicyclic reduction gear (4) is in transmission connection; Described reel (13) one ends are fixed in urceolus (11), the other end is set on the shell (29) of hydraulic brake by bearing (3).
2. a kind of hydraulic wireline winch according to claim 1 is characterized in that: be provided with oil ring (22) between described bolster (17) and the piston (7), this oil ring (22) constitutes sliding bearing structure with bolster (17), piston (7).
3. a kind of hydraulic wireline winch according to claim 1 is characterized in that: described piston (7) left end shaft is to extending into spline shaft structure, and constitutes spline with this axle head and pinion carrier (5) and be connected; The spline tooth of this castellated shaft is an involute gear profile.
4. a kind of hydraulic wireline winch according to claim 1, it is characterized in that: the right-hand member excircle of described urceolus (11) is provided with lateral wall (131), reel (13) right-hand member is fixedly connected on the lateral wall (131), and the outer rim of lateral wall (131) protrudes from the outer circumference surface of reel (13).
5. a kind of hydraulic wireline winch according to claim 1, it is characterized in that: described cylinder body (12) middle part is provided with sidewall, be provided with clutch oil pocket (A) between this sidewall and piston (7), bolster (17) is provided with the clutch oil duct (L) that feeds this clutch oil pocket (A); Be arranged with oil ring (22) on the described bolster (17), the inner groove (221) that this oil ring (22) is provided with outer groove (222), communicate with clutch oil duct (L) port and be connected outer groove (222) and the oil guiding hole (L1) of inner groove (221), inner groove (221), outer groove (222) lay respectively on the inside and outside circumference of oil ring (22) and are circular groove.
6. according to claim 1 or 2 or 3 or 4 or 5 described a kind of hydraulic wireline winchs, it is characterized in that: described hydraulic brake comprises shell (29), braking main shaft (28), brake strip (26), disc brake spring (27), and the brake piston (36) that can be resisted against brake strip (26) sidewall; Be provided with brake chamber (B) between brake piston (36) middle part and shell (29), shell (29) is provided with the braking oil duct (p4) that feeds this braking oil pocket (B).
7. a kind of hydraulic wireline winch according to claim 6, it is characterized in that: be provided with stopper tab (25) in the described shell (29), this stopper tab (25) one sidewalls and brake strip (26) offsets, another sidewall is provided with surface bearing (24) and constitute with this surface bearing (24) and pinion carrier (5) and to be in transmission connection.
8. a kind of hydraulic wireline winch according to claim 6 is characterized in that: sun wheel (38) left end of described epicyclic reduction gear (4) extends to axle, and this axle is provided with spline and is in transmission connection with this spline and braking main shaft (28) formation.
9. according to claim 1 or 2 or 3 or 4 or 5 described a kind of hydraulic wireline winchs, it is characterized in that: described urceolus (11) right-hand member is provided with gear ring (24), this gear ring (24) and the coaxial setting of bolster (17); Described bolster (17) is fixedly connected with right support (19), and right support (19) is provided with rotating shaft (18), and rotating shaft (18) is provided with and gear ring (24) gears in mesh (23); The right-hand member of described urceolus (11) is provided with madial wall (132), and madial wall (132) is fixed on the bolster (17) by bearing (16), and madial wall (132) is provided with boss, and gear ring (24) is fixed on this boss.
10. according to claim 1 or 2 or 3 or 4 or 5 described a kind of hydraulic wireline winchs, it is characterized in that: described reel (13) connects the tube structure at two ends for the equal diameter endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200789902U CN202016817U (en) | 2011-03-24 | 2011-03-24 | Hydraulic winch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200789902U CN202016817U (en) | 2011-03-24 | 2011-03-24 | Hydraulic winch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202016817U true CN202016817U (en) | 2011-10-26 |
Family
ID=44810491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200789902U Expired - Lifetime CN202016817U (en) | 2011-03-24 | 2011-03-24 | Hydraulic winch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202016817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718161A (en) * | 2011-03-24 | 2012-10-10 | 意宁液压股份有限公司 | Hydraulic winch |
| CN106586859A (en) * | 2016-12-29 | 2017-04-26 | 意宁液压股份有限公司 | Integrated hydraulic winch structure |
| CN108059102A (en) * | 2018-01-18 | 2018-05-22 | 青岛科技大学 | A kind of electric motor built-in underwater winch |
-
2011
- 2011-03-24 CN CN2011200789902U patent/CN202016817U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718161A (en) * | 2011-03-24 | 2012-10-10 | 意宁液压股份有限公司 | Hydraulic winch |
| CN102718161B (en) * | 2011-03-24 | 2015-05-06 | 意宁液压股份有限公司 | Hydraulic winch |
| CN106586859A (en) * | 2016-12-29 | 2017-04-26 | 意宁液压股份有限公司 | Integrated hydraulic winch structure |
| CN106586859B (en) * | 2016-12-29 | 2019-02-19 | 意宁液压股份有限公司 | A kind of integrated hydraulic winch structure |
| CN108059102A (en) * | 2018-01-18 | 2018-05-22 | 青岛科技大学 | A kind of electric motor built-in underwater winch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO DAGANG INI HYDRAULIC CO., LTD. Free format text: FORMER OWNER: HU SHIXUAN Effective date: 20120723 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120723 Address after: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee after: Ningbo Dagang Yining Hydraulic Co., Ltd. Address before: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee before: Hu Shixuan |
|
| C56 | Change in the name or address of the patentee |
Owner name: INI HYDRAULIC CO., LTD. Free format text: FORMER NAME: NINGBO DAGANG YI'NING HYDRAULIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee after: Ini Hhydraulic Co., Ltd. Address before: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee before: Ningbo Dagang Yining Hydraulic Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111026 |
|
| CX01 | Expiry of patent term |