CN111792510A - Hoisting device for installing speed reducer part of wind driven generator - Google Patents
Hoisting device for installing speed reducer part of wind driven generator Download PDFInfo
- Publication number
- CN111792510A CN111792510A CN202010702702.XA CN202010702702A CN111792510A CN 111792510 A CN111792510 A CN 111792510A CN 202010702702 A CN202010702702 A CN 202010702702A CN 111792510 A CN111792510 A CN 111792510A
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- CN
- China
- Prior art keywords
- sliding sleeve
- speed reducer
- reducer part
- rod
- rods
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/108—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means for lifting parts of wind turbines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
- B66B1/14—Control systems without regulation, i.e. without retroactive action electric with devices, e.g. push-buttons, for indirect control of movements
- B66B1/22—Control systems without regulation, i.e. without retroactive action electric with devices, e.g. push-buttons, for indirect control of movements with means for taking account of delayed calls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A hoisting device for installing the reducer of wind-driven generator is composed of a vertical column with a hoisting ring at its top, a slide sleeve moving up and down on said vertical column, the outer surface of the sliding sleeve is hinged with a plurality of side pull rods, the other end of each side pull rod is respectively hinged with the upper end part of a vertical suspender, the lower end part of the suspender is provided with a lifting hook folded to the outside, the upright post below the sliding sleeve is respectively provided with a positioning sleeve and two connecting rings fixed at intervals, the two connecting rings are respectively hinged with a group of side supporting rods, the other ends of the two groups of side supporting rods are respectively hinged with the hanging rod, when the speed reducer part is hoisted, the hoisting ring is hung on the hoisting machine hook, the sliding sleeve is lifted upwards, the plurality of lifting hooks are hung inside the speed reducer part, and the lifting hook hooks the bottom of the speed reducer part, and after the crane is started, the included angle between the side pull rod and the side support rod is reduced, so that the hanger rod is outwards opened to clamp the speed reducer part. The invention has the characteristics of high assembly efficiency, low cost, reliable performance, simple structure, convenient operation and the like.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a hoisting device, in particular to a hoisting device for installing a speed reducer part of a wind driven generator, which can effectively save the installation time and reduce the labor cost.
[ background of the invention ]
With the increasing contradiction between the increasing demand of modern energy and the worsening of living environment, renewable energy is receiving more and more attention due to its large increase range and high speed. Among various renewable energy sources, wind is an energy source without public nuisance, the wind power generation is very environment-friendly, and the generated electric energy is very huge, so that more and more countries pay more attention to the wind power generation. Moreover, it is inexhaustible. The wind power generation device is very suitable for and can be used for generating electricity by utilizing wind power according to local conditions in coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic.
Wind power generation converts kinetic energy of wind into mechanical kinetic energy, and then converts the mechanical energy into electrical kinetic energy. The principle of wind power generation is that wind power is used for driving windmill blades to rotate, and then the rotating speed is increased through a speed increaser, so that a generator is promoted to generate electricity. The wind power generation yaw speed reducer mainly enables a wind wheel to track the wind direction, and the variable pitch speed reducer is used for changing the attack angle of airflow to blades by adjusting the pitch of blades when the wind speed is too high or too low, so that the aerodynamic torque obtained by a wind turbine generator is changed, and the power output is kept stable. In the installation and maintenance process of the wind driven generator, the amount of the yaw and pitch-variable speed reducer is very large, so that the installation occupation time of the wind driven generator is long, and therefore, the objective requirement is met by how to improve the installation efficiency of the speed reducer and save the installation time and cost of the wind driven generator.
[ summary of the invention ]
The invention aims to solve the problems and provides the hoisting device for installing the wind driven generator speed reducer component, which can effectively improve the installation efficiency of the speed reducer, save the installation time and save the labor cost.
In order to realize the aim of the invention, the invention provides a hoisting device for installing a speed reducer part of a wind driven generator, which is provided with a stand column, the top of the stand column is provided with a hoisting ring, the stand column is provided with a sliding sleeve capable of moving up and down, the outer surface of the sliding sleeve is hinged with a plurality of groups of side pull rods along the circumferential direction, the other ends of the side pull rods are respectively hinged with the upper end part of a vertical hoisting rod, the lower end part of the hoisting rod is provided with a lifting hook folded towards the outside, the stand column below the sliding sleeve is respectively provided with a movable and fixed positioning sleeve and two connecting rings fixed on the stand column at intervals, the two connecting rings are respectively hinged with a group of side supporting rods, the other ends of the two groups of side supporting rods are respectively hinged with the hoisting rod, when the speed reducer part is hoisted, the hoisting ring is, then the sliding sleeve is loosened to enable the lifting hook to hook the bottom of the speed reducer part, and after the crane is started, the included angle between the side pull rod and the side support rod is reduced, so that the hanging rod is outwards opened to clamp the speed reducer part.
The stand is cylindricly, and its top is equipped with the screw hole, rings bottom is equipped with the screw rod with screw hole complex, rings through the screw rod of its screw rod and the screw hole threaded connection of stand.
The hanger rods are rectangular rod-shaped bodies, and three hanger rods are uniformly distributed along the circumferential direction.
The sliding sleeve comprises a sliding sleeve main body and a connecting piece integrally formed at the lower end of the sliding sleeve main body, a plurality of first lug seats are arranged on the outer surface of the connecting piece at intervals along the circumferential direction, and the plurality of groups of side pull rods are hinged with the plurality of first lug seats through pin shafts respectively.
The side pull rods are provided with three groups, each group of side pull rods comprises two pull rods which are arranged in parallel at intervals, one ends of the two pull rods are respectively hinged with the sliding sleeve through pin shafts, and the other ends of the two pull rods are respectively hinged to two sides of the top of the hanging rod through pin shafts.
The positioning sleeve is provided with a threaded hole, an inner hexagonal bolt penetrates through the threaded hole, and the position of the positioning sleeve can be adjusted and fixed by screwing or loosening and moving the inner hexagonal bolt.
The go-between is located the adapter sleeve on the stand and is located a plurality of second ear seats of adapter sleeve surface including the cover, the quantity of second ear seat is corresponding with the quantity of jib, the second ear seat is articulated through round pin axle and collateral branch vaulting pole.
Each group of side supporting rods comprises two supporting rods which are arranged in parallel at intervals, one ends of the two supporting rods are hinged to the connecting ring through pin shafts respectively, and the other ends of the two supporting rods are hinged to the two sides of the hanging rod through pin shafts respectively.
The invention effectively overcomes the defects of low assembly efficiency, high cost and the like of the traditional wind driven generator speed reducer. The hoisting device is used for hoisting yaw and pitch reducer parts when a wind driven generator is installed, the hoisting rings are hung on the hook of the crane, the sliding sleeves are lifted upwards to hang a plurality of suspenders inside the reducer parts, the hooks are hooked on the bottoms of the reducer parts, and after the crane is started, the included angles between the side pull rods and the side support rods are reduced, so that the suspenders are expanded outwards to clamp the reducer parts, thereby realizing the hoisting of the reducer parts, not only saving the installation time and improving the installation efficiency, but also reducing the labor cost. On the other hand, the invention can also adjust the outward expansion range of the suspender by adjusting the position of the positioning sleeve, thereby realizing the hoisting of speed reducer parts with different sizes. In addition, the suspender is supported by the two groups of side supporting rods and clamped between the two supporting rods of each group of side supporting rods, so that the balance of the suspender is ensured, and the reliability of the hoisting device is ensured. The invention also has the characteristics of simple structure, convenient operation and the like.
[ description of the drawings ]
Fig. 1 is a schematic perspective view of the present invention.
[ detailed description ] embodiments
The following examples are further illustrative and supplementary to the present invention and do not limit the present invention in any way.
Referring to fig. 1, the lifting device for installing a reducer component of a wind turbine generator according to the present invention includes a vertical column 10, a suspension rod 20, a sliding sleeve 30, a side pull rod 40, a positioning sleeve 50, a connecting ring 60, and a side support rod 70. The hoisting device is used for installing a yaw speed reducer and a pitch speed reducer part of a wind driven generator, specifically an annular part of the speed reducer, and certainly, other types of speed reducer parts can also be installed according to actual needs.
As shown in fig. 1, the column 10 is cylindrical, and a hanging ring 11 for hanging on a hook of a crane is provided at the top of the column 10. The rings 11 and the upright post 10 of this embodiment are in threaded connection, specifically, a threaded hole is formed in the top of the upright post 10, a screw rod matched with the threaded hole is arranged at the lower end of the rings 11, during installation, the screw rod of the rings 11 is inserted into the threaded hole of the upright post 10, so that the rings 11 are in threaded connection with the threaded hole of the upright post 10 through the screw rod, and the screw rod is screwed down, so that the installation is very convenient. A plurality of hangers 20 are provided at intervals on the outer periphery of the column 10, the hangers 20 are rectangular rod-shaped bodies which are vertically provided, and hooks 21 which are folded outward are provided at the lower end portions of the hangers 20, and the hooks 21 are used for hooking the bottom portions of the speed reducer parts. In this embodiment, the hanger rods 20 are three, and the three hanger rods 20 are uniformly distributed along the circumferential direction.
As shown in fig. 1, a sliding sleeve 30 is provided on the column 10, the sliding sleeve 30 can move up and down on the column 10, a plurality of sets of side rods 40 are hinged to the outer surface of the sliding sleeve 30 along the circumferential direction, and the other ends of the side rods 40 are respectively hinged to the upper end of the suspension rod 20. Specifically, the inner diameter of the sliding sleeve 30 is larger than the outer diameter of the upright post 10, and the sliding sleeve is sleeved on the upright post 10 and can move up and down on the upright post. The sliding sleeve 30 includes a sliding sleeve main body 31 and a connecting member 32, wherein the sliding sleeve main body 31 is a hollow cylinder, and the connecting member 32 is disposed at the lower end of the sliding sleeve main body 31 and is integrally formed with the sliding sleeve main body 31. A plurality of first ear seats 33 are provided on the outer surface of the connecting member 32 in the circumferential direction for being hinged to the plurality of sets of side pull rods 40. In this embodiment, three first ear seats 33 are disposed on the outer surface of the connecting member 32 along the circumferential direction, and the first ear seats 33 are hinged to one end of the side pull rod 40 through a pin 80. The other end of the side pull rod 40 is hinged to the top of the boom 20. Each set of side tie bars 40 includes two tie bars 41, and the two tie bars 41 are disposed at two sides of the top of the suspension rod 20 in parallel and at intervals, so that the suspension rod 20 is clamped between the two tie bars 41. When the sliding sleeve 30 moves upward, it drives each side pull rod 40 upward, so that the included angle between the side pull rod 40 and the suspension rod 20 is increased, and vice versa. As shown in fig. 1, a positioning sleeve 50 is disposed on the column below the sliding sleeve 30, and the positioning sleeve 50 is used for limiting the downward movement position of the sliding sleeve 30. The positioning sleeve 50 in this embodiment can move and be fixed on the column, that is, the positioning sleeve 50 can be set to a fixed position according to actual needs, so that the device is suitable for hoisting speed reducers with different sizes. Specifically, a threaded hole is formed in the positioning sleeve 50, an inner hexagonal bolt 51 penetrates through the threaded hole, the positioning sleeve 50 is fixed on the upright post 10 by screwing the inner hexagonal bolt 51, when the position of the positioning sleeve 50 needs to be adjusted, the positioning sleeve 50 can be moved by loosening the inner hexagonal bolt 51, when the positioning sleeve is moved in place, the positioning sleeve 50 can be fixed on the upright post 10 again by screwing the inner hexagonal bolt 51, and therefore the positioning sleeve 50 can be adjusted and fixed by screwing or loosening and moving the inner hexagonal bolt 51. Meanwhile, the hanging ring 11 disposed on the top of the upright 10 can be used to limit the upward movement position of the sliding sleeve 30, so as to prevent the sliding sleeve 30 from separating from the upright 10 when the sliding sleeve 30 is moved upward. In this embodiment, by adjusting the position of the positioning sleeve 50, under the limiting effect of the positioning sleeve 50 and the hanging ring 11, the included angle between the side pull rod 40 and the hanging rod 20 can be changed within the range of 0-90 degrees when the sliding sleeve 30 is moved.
As shown in fig. 1, two connection rings 60 are further provided on the column below the sliding sleeve 30, a plurality of sets of side support rods 70 are respectively hinged on the two connection rings 60, and the other ends of the plurality of sets of side support rods 70 are respectively hinged with the suspension rod 20. Specifically, the connection ring 60 includes a connection sleeve 61 and a plurality of second ear seats 62, wherein the connection sleeve 61 is sleeved on the upright post 10, the plurality of second ear seats 62 are respectively disposed on the circumference of the outer surface of the connection sleeve 61, the number of the second ear seats 62 corresponds to the number of the suspension rods 20, and in this embodiment, there are three second ear seats 62. Each second ear mount 62 is hinged to the side support 70 by a pin 80. Each group of side supporting rods 70 comprises two supporting rods 71, and the two supporting rods 71 are hinged to two sides of the suspension rod 20 in parallel at intervals through a pin 80, so that the suspension rod 20 is clamped between the two supporting rods 71 to ensure the balance of the suspension rod 20 in the using process. When the sliding sleeve 30 moves upwards, it drives each side rod 40 to move upwards, so that the included angle between the side rod 40 and the suspension rod 20 is increased, meanwhile, the suspension rod 20 moves upwards under the support of the side support rod 70, so that the included angle between the side support rod 70 and the suspension rod 20 is increased, and the three suspension rods 20 are contracted towards the upright post 10, so that the diameter of the circle surrounded by the three suspension rods 20 is decreased, and vice versa. In the process of moving the sliding sleeve 30 up and down, the quadrangle formed by the upright post 10, the hanging rod 20 and the two groups of side supporting rods 70 is always a parallelogram, thereby ensuring the stability of the hanging rod 20. In this embodiment, by adjusting the position of the positioning sleeve 50, under the limiting effect of the positioning sleeve 50 and the hanging ring 11, when the sliding sleeve 30 is moved, the included angle between the side supporting rod 70 and the hanging rod 20 can be changed within the range of 0-90 degrees, so that the hanging rod 20 can be expanded or contracted to meet the hoisting requirements of speed reducer parts with different sizes.
Referring to fig. 1, the method for hoisting the reducer part of the present invention comprises: firstly, the hexagon socket head cap screw 51 on the positioning sleeve 50 is loosened, the position of the positioning sleeve 50 is adjusted according to the inner diameter of the speed reducer part, when the sliding sleeve 30 moves downwards to the positioning sleeve 50, the outer diameter formed by the three suspenders 20 is matched with the inner diameter of the speed reducer part, then the hexagon socket head cap screw 51 is screwed, and the positioning sleeve 50 is fixed on the upright post 10. Then hang rings 11 on the crane hook, pull up sliding sleeve 30, at this moment, the contained angle between side pull rod 40 and side bracing piece 70 increases, jib 20 is inwards contracted, make jib 20 enter the reduction gear inside to lifting hook 21 wear out the reduction gear part, then loosen sliding sleeve 30, make lifting hook 21 hook reduction gear part bottom, after the crane starts, sliding sleeve 30 moves down under the weight effect of reduction gear part, make side pull rod 40 move down, at this moment, the contained angle between side pull rod 40 and side bracing piece 70 reduces, cause jib 20 to outwards open and press from both sides the reduction gear part tightly.
Although the present invention has been described with reference to the above embodiments, the scope of the present invention is not limited thereto, and modifications, substitutions and the like of the above members are intended to fall within the scope of the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a install hoist device of aerogenerator reduction gear part, its characterized in that, the device are equipped with stand (10), the stand top is equipped with rings (11) be equipped with sliding sleeve (30) that can reciprocate on stand (10), and this sliding sleeve (30) surface articulates along the circumferencial direction has multiunit side pull rod (40), and the other end of each group side pull rod (40) articulates respectively in vertical jib (20) upper end, the tip is equipped with lifting hook (21) that rolls over to the outside under jib (20) be equipped with respectively on the stand of sliding sleeve (30) below portable and fixed position sleeve (50) and two intervals are fixed in go-between (60) on the stand, respectively articulate on two go-between (60) have multiunit side bracing piece (70), the other end of multiunit side bracing piece (70) respectively with jib (20) are articulated mutually, and the go-between (60)
When hoisting the speed reducer part, will rings (11) are hung on the crane hook, and to lifting sliding sleeve (30), hang a plurality of jibs (20) inside the speed reducer part, then loosen sliding sleeve (30), make the lifting hook the speed reducer part bottom, the crane starts the back, and the contained angle between side pull rod (40) and side bracing pole (70) reduces, causes jib (20) to outwards open and press from both sides the speed reducer part tightly.
2. The hoisting device for installing the reducer part of the wind driven generator according to claim 1, wherein the upright (10) is cylindrical, the top of the upright is provided with a threaded hole, the bottom of the hanging ring (11) is provided with a screw rod matched with the threaded hole, and the hanging ring (11) is in threaded connection with the threaded hole of the upright (10) through the screw rod of the hanging ring.
3. The lifting device for assembling a reducer part of a wind turbine according to claim 1, wherein the hanger rods (20) are rectangular rod-shaped bodies, three of which are uniformly distributed in the circumferential direction.
4. The lifting device for installing the reducer part of the wind driven generator as claimed in claim 1, wherein the sliding sleeve (30) comprises a sliding sleeve body (31) and a connecting member (32) integrally formed at the lower end of the sliding sleeve body (31), a plurality of first lug seats (33) are arranged on the outer surface of the connecting member (32) at intervals along the circumferential direction, and the plurality of sets of side pull rods (40) are respectively hinged with the plurality of first lug seats (33) through pin shafts (80).
5. The lifting device for assembling the reducer part of the wind driven generator according to claim 1, wherein the side pull rods (40) are provided with three groups, each group of side pull rods (40) comprises two pull rods (41) which are arranged in parallel and at intervals, one ends of the two pull rods (41) are respectively hinged with the sliding sleeve (30) through a pin shaft (80), and the other ends of the two pull rods are respectively hinged with two sides of the top of the suspension rod (20) through the pin shaft (80).
6. The lifting device for assembling a reducer part of a wind turbine according to claim 1, wherein the positioning sleeve (50) is provided with a threaded hole, a hexagon socket head cap screw (51) is inserted into the threaded hole, and the position of the positioning sleeve (50) can be adjusted and fixed by screwing or unscrewing and moving the hexagon socket head cap screw (51).
7. The hoisting device for installing the reducer part of the wind driven generator according to claim 1, wherein the connecting ring (60) comprises a connecting sleeve (61) sleeved on the upright post (10) and a plurality of second lug seats (62) arranged on the outer surface of the connecting sleeve (61), the number of the second lug seats (62) corresponds to the number of the suspension rods (20), and the second lug seats (62) are hinged with the side supporting rods (70) through pin shafts (80).
8. The lifting device for installing the reducer part of the wind-driven generator as claimed in claim 1, wherein each group of the side supporting rods (70) comprises two supporting rods (71) arranged in parallel and spaced, one end of each of the two supporting rods (71) is hinged to the connecting ring (60) through a pin (80), and the other end of each of the two supporting rods (71) is hinged to both sides of the suspension rod (20) through a pin (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010702702.XA CN111792510A (en) | 2020-07-21 | 2020-07-21 | Hoisting device for installing speed reducer part of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010702702.XA CN111792510A (en) | 2020-07-21 | 2020-07-21 | Hoisting device for installing speed reducer part of wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111792510A true CN111792510A (en) | 2020-10-20 |
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ID=72808187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010702702.XA Pending CN111792510A (en) | 2020-07-21 | 2020-07-21 | Hoisting device for installing speed reducer part of wind driven generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN111792510A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014149A (en) * | 2021-11-04 | 2022-02-08 | 中船澄西扬州船舶有限公司 | Lifting device for rudder system polymer bushing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0494396A (en) * | 1990-08-03 | 1992-03-26 | Daicel Chem Ind Ltd | Lifting transportation tool |
| CN102701071A (en) * | 2012-06-21 | 2012-10-03 | 江苏建华管桩有限公司 | Internal expanding type lifting hoist |
| CN202529699U (en) * | 2012-03-29 | 2012-11-14 | 上海宝钢工业技术服务有限公司 | Three-claw folding sling for dismounting and mounting bearing |
| CN104355221A (en) * | 2014-10-27 | 2015-02-18 | 无锡市得力手机械有限公司 | Dry-type wire drawing machine wire rack |
| CN206940235U (en) * | 2017-07-03 | 2018-01-30 | 山西恒跃锻造有限公司 | A kind of flexible normalizing suspender |
-
2020
- 2020-07-21 CN CN202010702702.XA patent/CN111792510A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0494396A (en) * | 1990-08-03 | 1992-03-26 | Daicel Chem Ind Ltd | Lifting transportation tool |
| CN202529699U (en) * | 2012-03-29 | 2012-11-14 | 上海宝钢工业技术服务有限公司 | Three-claw folding sling for dismounting and mounting bearing |
| CN102701071A (en) * | 2012-06-21 | 2012-10-03 | 江苏建华管桩有限公司 | Internal expanding type lifting hoist |
| CN104355221A (en) * | 2014-10-27 | 2015-02-18 | 无锡市得力手机械有限公司 | Dry-type wire drawing machine wire rack |
| CN206940235U (en) * | 2017-07-03 | 2018-01-30 | 山西恒跃锻造有限公司 | A kind of flexible normalizing suspender |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014149A (en) * | 2021-11-04 | 2022-02-08 | 中船澄西扬州船舶有限公司 | Lifting device for rudder system polymer bushing |
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Application publication date: 20201020 |
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| RJ01 | Rejection of invention patent application after publication |