CN111483918A - Automatic locking hook of crane - Google Patents
Automatic locking hook of crane Download PDFInfo
- Publication number
- CN111483918A CN111483918A CN202010342360.5A CN202010342360A CN111483918A CN 111483918 A CN111483918 A CN 111483918A CN 202010342360 A CN202010342360 A CN 202010342360A CN 111483918 A CN111483918 A CN 111483918A
- Authority
- CN
- China
- Prior art keywords
- hook
- automatic locking
- sliding groove
- soft rack
- fixedly connected
- Prior art date
- 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.)
- Pending
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Classifications
-
- 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
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
- B66C1/34—Crane hooks
- B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
- F16H1/163—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel with balls between the co-operating parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
Abstract
The invention discloses an automatic locking lifting hook of a crane, which comprises a hook body and a fixing box, wherein the fixing box is fixedly connected to the upper end of the hook body, the back of the hook body is provided with a sliding groove, the bottom and two side surfaces of the sliding groove are respectively provided with a guide roller, the front end inside the sliding groove is provided with a clamping ring, the tooth surface of a soft rack faces outwards, the outer side of the soft rack is meshed with a turbine gear, the inside of the fixing box is fixedly connected with a motor, the output end of the motor is in transmission connection with a driving gear, the outer side of the driving gear is meshed with a worm gear, the axis end of the worm gear is fixedly connected with a worm, the worm is in transmission connection with a turbine. This automatic locking lifting hook of hoist through the setting of the inside drive mechanism of fixed box, has played the effect of the automatic joint shutoff of control card ring, and the reverse locking effect in worm gear area certainly to guaranteed that the snap ring joint can remain the lock throughout after the inside of draw-in groove.
Description
Technical Field
The invention relates to the technical field of crane equipment, in particular to an automatic locking hook of a crane.
Background
In recent years, with the rapid development of the industry in China, the requirement of the crane in the industry is increased day by day, so that the hoisting machinery in China is also rapidly developed, and the hook is one of the widely used working devices in the field of cranes, and belongs to a special part with higher safety and reliability requirements in tools used by the cranes. However, in the process of lifting or dropping, the existing lifting hook is easy to get out of hook due to collision, mechanical or personal safety accidents are caused, safety production is affected, and the existing lifting hook cannot realize automatic locking of the lifting hook.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an automatic locking lifting hook of a crane, which has the advantages of automatic locking, unhooking prevention, safety, practicability and the like, and solves the problems.
(II) technical scheme
In order to realize the purposes of automatic locking, unhooking prevention, safety and practicability, the invention provides the following technical scheme: automatic locking lifting hook of hoist, including coupler body and fixed box, fixed box fixed connection is in the upper end of coupler body, the spout has been seted up at the back of coupler body, the bottom and two sides of spout all are provided with guide roller, the inside front end of spout is provided with the snap ring, the inside rear end of spout has soft rack, the flank of tooth of soft rack is outwards, the outside meshing of soft rack has the turbine gear, the inside fixedly connected with motor of fixed box, the output transmission of motor is connected with the driving gear, the outside meshing of driving gear has the worm gear, the axle center fixedly connected with worm of worm gear, worm transmission is connected with the turbine, the axle center fixedly connected with transfer line of turbine, the turbine gear passes through the transfer line and is connected with the turbine transmission.
Preferably, the top of the hook body penetrates through the upper end of the fixing box, and the top of the hook body is provided with a connecting hole.
Preferably, the upper end of the fixed box is buckled with a gland, and the top of the gland is fixedly connected with a pull head.
Preferably, the soft rack and the close end of the clamping ring are welded and fixed, and edges are reserved on two sides of the soft rack.
Preferably, the guide rollers at the bottom of the chute are defined as a group A rollers, and the guide rollers at the two side surfaces of the chute are defined as a group B rollers.
Preferably, the back of the soft rack is in transmission connection with the surface of the group A roller, and the edge of the soft rack is in transmission connection with the surface of the group B roller.
Preferably, the track of the sliding groove is consistent with the outer contour of the hook body, and the tail end of the sliding groove penetrates through the inner side of the hook head of the hook body.
Preferably, the clamping ring is concentric with the arc of the lifting hook of the hook body, the inner side of the hook body is provided with a clamping groove, and the clamping groove is located on the rotating track of the clamping ring.
Preferably, the snap ring is slidably connected inside the sliding groove, and the snap ring can be inserted into the clamping groove through the sliding groove.
(III) advantageous effects
Compared with the prior art, the invention provides an automatic locking hook of a crane, which has the following beneficial effects:
1. the crane automatic locking lifting hook has the advantages that through the matching effect of the sliding groove, the clamping ring and the clamping groove, the tail end of the sliding groove penetrates through the inner side of the lifting hook, the clamping ring slides out along the clamping groove in the using process, and one end of the clamping ring is inserted into the clamping groove, so that clamping is completed, the effect of locking the lifting hook is achieved, and heavy objects can be effectively prevented from slipping; through the setting of soft rack, guide roller, the one end and the snap ring welding of soft rack are in the same place to limiting displacement through two rows of guide roller makes soft rack drive the inside slip-in or the roll-off of snap ring edge spout, and the slip effect of snap ring is smooth, has guaranteed the stability of automatic joint locking.
2. This automatic locking lifting hook of hoist, through the setting of the inside drive mechanism of fixed box, utilize a small-size motor to make the turbine worm cooperation rotate, and through the slip of the soft rack of gear drive control, thereby the effect of the automatic joint shutoff of control card ring has been played, in addition, the worm gear is from taking reverse locking effect, thereby guaranteed the snap ring joint in the inside back of draw-in groove, can remain the locking throughout, prevent unexpected unhook, the security of hoist lifting hook has been improved, and this lifting hook can accomplish automatic locking, high durability and convenient use.
Drawings
FIG. 1 is a schematic structural view of a hook and a fixing box according to the present invention;
FIG. 2 is a schematic view of the interior of the fixing box according to the present invention;
FIG. 3 is a side sectional view of the fixing box according to the present invention;
FIG. 4 is a side sectional structural view of the hook body according to the present invention;
FIG. 5 is a schematic view of the structure of the guide roller and the chute according to the present invention;
fig. 6 is an enlarged schematic structural view of a portion a in fig. 4 according to the present invention.
In the figure: 1. a hook body; 2. a fixing box; 201. a gland; 202. a slider; 3. a chute; 4. a guide roller; 5. a snap ring; 6. a soft rack; 7. a turbine; 701. a turbine gear; 8. a motor; 801. a driving gear; 9. a worm; 901. a worm gear; 10. a transmission rod; 11. connecting holes; 12. a clamping groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the automatic locking hook of the crane comprises a hook body 1 and a fixed box 2, the fixed box 2 is fixedly connected to the upper end of the hook body 1, the upper end of the fixed box 2 is buckled with a gland 201, the top of the gland 201 is fixedly connected with a pull head 202, the back of the hook body 1 is provided with a chute 3, the bottom and two side surfaces of the chute 3 are both provided with guide rollers 4, the end close to the snap ring 5 is welded and fixed with a soft rack 6, two sides of the soft rack 6 are provided with edges, the guide rollers 4 at the bottom of the chute 3 are defined as group a rollers, the guide rollers 4 at two side surfaces of the chute 3 are group B rollers, the back of the soft rack 6 is in transmission connection with the surface of the group a rollers, the edge of the soft rack 6 is in transmission connection with the surface of the group B rollers, the snap ring 5 is arranged at the front end inside of the chute 3, the rear end of, the tail end of the sliding groove 3 penetrates through the inner side of the hook head of the hook body 1, the soft rack 6 and the close end of the clamping ring 5 are welded and fixed, the clamping ring 5 is concentric with a lifting hook arc of the hook body 1, the inner side of the hook body 1 is provided with the clamping groove 12, the clamping groove 12 is located on the rotating track of the clamping ring 5, the clamping ring 5 is connected to the inner part of the sliding groove 3 in a sliding mode, the clamping ring 5 can penetrate through the sliding groove 3 and be connected to the inner part of the clamping groove 12 in an inserting mode, through the matching effect of the sliding groove 3, the clamping ring 5 and the clamping groove 12, the tail end of the sliding groove 3 penetrates through the inner side of the lifting hook, the clamping ring 5 slides out along the clamping groove 12 in the using; through the arrangement of the soft rack 6 and the guide rollers 4, one end of the soft rack 6 is welded with the snap ring 5, and through the limiting action of the two rows of guide rollers 4, the soft rack 6 drives the snap ring 5 to slide in or out along the inside of the chute 3, the sliding effect of the snap ring 5 is smooth, the stability of automatic clamping and locking is ensured, edges are left on two sides of the soft rack 6, the tooth surface of the soft rack 6 faces outwards, the outer side of the soft rack 6 is meshed with a turbine gear 701, the inside of the fixed box 2 is fixedly connected with a motor 8, the output end of the motor 8 is in transmission connection with a driving gear 801, the outer side of the driving gear 801 is meshed with a worm gear 901, the axis end of the worm gear 901 is fixedly connected with a worm 9, the worm 9 is in transmission connection with a turbine 7, the axis end of the turbine 7 is fixedly connected with a transmission rod 10, the turbine gear 701 is in transmission, utilize a small-size motor 8 to make the turbine worm cooperation rotate to through the slip of gear drive control soft rack 6, thereby played the effect of 5 automatic joint shutoff of control card ring, in addition, the reverse locking effect in worm gear area certainly, thereby guaranteed 5 joints of snap ring and can remain the locking throughout after the inside of draw-in groove 12, prevent unexpected unhook, improved crane hook's security, and this lifting hook can accomplish automatic locking, convenient to use.
When in use, a fixed box 2 is fixedly connected at the upper end of an original hook body 1 and is used for installing a power component of the self-locking lifting hook of the crane, a sliding groove 3 is arranged at the back of the hook body 1 along the outline of the outer side of the hook body, the sliding groove 3 extends to the head end of the lifting hook and penetrates through the inner side of the lifting hook, a snap ring 5 is connected in the sliding groove 3 in a sliding manner, the snap ring 5 is concentric with the arc of the lifting hook, so that the snap ring 5 can slide around the inner part of the sliding groove 3 to be blocked in the clamping groove 12, one end of the snap ring 5 is welded with a soft rack 6, a motor 8 in the fixed box 2 works to drive a worm 9 and a turbine 7 to rotate, a turbine gear 701 is driven by a transmission rod 10, the soft rack 6 starts to slide along the inner part of the sliding groove 3, and the tensile force and the thrust force of the soft rack 6 can be transmitted to the upper, thereby make snap ring 5 slide along the inside of spout 3, 3 roll-offs of spout are followed to final one end of snap ring 5, and plug in the inside of draw-in groove 12, accomplish the joint, have utilized worm gear's effect, have guaranteed that this snap ring can be from locking, prevent the danger of unexpected unhook, and this hoist automatic locking lifting hook reasonable in design possesses stable auto-lock effect.
To sum up, the crane automatically locks the lifting hook, the tail end of the sliding chute 3 penetrates through the inner side of the lifting hook through the matching action of the sliding chute 3, the clamping ring 5 and the clamping groove 12, the clamping ring 5 slides out along the clamping groove 12 in the use process, and one end of the clamping ring is inserted into the clamping groove 12, so that clamping is completed, the effect of locking the lifting hook is achieved, and heavy objects can be effectively prevented from sliding out; one end of the soft rack 6 is welded with the clamping ring 5 through the arrangement of the soft rack 6 and the guide rollers 4, and the soft rack 6 drives the clamping ring 5 to slide in or out along the inner part of the sliding groove 3 through the limiting action of the two rows of guide rollers 4, the sliding effect of the clamping ring 5 is smooth, and the stability of automatic clamping and locking is ensured; this automatic locking lifting hook of hoist, setting through the inside drive mechanism of fixed box 2, utilize a small motor 8 to make the worm gear cooperation rotate, and through the slip of gear drive control soft rack 6, thereby the effect of 5 automatic joint shutoff of control card ring has been played, in addition, the worm gear is from taking reverse locking effect, thereby guaranteed 5 joints of snap ring behind the inside of draw-in groove 12, can remain locking all the time, prevent unexpected unhook, the security of hoist lifting hook has been improved, and this lifting hook can accomplish automatic locking, high durability and convenient use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. Automatic locking lifting hook of hoist, including coupler body (1) and fixed box (2), its characterized in that: the fixed box (2) is fixedly connected to the upper end of the hook body (1), a sliding groove (3) is formed in the back of the hook body (1), guide rollers (4) are arranged at the bottom and two side faces of the sliding groove (3), a clamping ring (5) is arranged at the front end inside the sliding groove (3), a soft rack (6) is arranged at the rear end inside the sliding groove (3), the tooth surface of the soft rack (6) faces outwards, a turbine gear (701) is meshed with the outer side of the soft rack (6), a motor (8) is fixedly connected inside the fixed box (2), an output end of the motor (8) is in transmission connection with a driving gear (801), a worm gear (901) is meshed with the outer side of the driving gear (801), a worm (9) is fixedly connected with the axis of the worm gear (901), a turbine (7) is in transmission connection with the axis of the turbine (7), a transmission rod (10) is fixedly connected with the axis of, the turbine gear (701) is in transmission connection with the turbine (7) through a transmission rod (10).
2. The crane automatic locking hook as claimed in claim 1, wherein: the top of the hook body (1) penetrates through the upper end of the fixed box (2), and a connecting hole (11) is formed in the top of the hook body (1).
3. The crane automatic locking hook as claimed in claim 1, wherein: the upper end of the fixed box (2) is buckled with a gland (201), and the top of the gland (201) is fixedly connected with a pull head (202).
4. The crane automatic locking hook as claimed in claim 1, wherein: the soft rack (6) is welded and fixed with the end, close to the clamping ring (5), of the clamping ring, and edges are reserved on two sides of the soft rack (6).
5. The crane automatic locking hook as claimed in claim 4, wherein: the guide rollers (4) at the bottom of the chute (3) are defined as group A rollers, the guide rollers (4) at the two side surfaces of the chute (3) are group B rollers, and the group A gears and the group B gears are symmetrically arranged.
6. The crane automatic locking hook as claimed in claim 5, wherein: the back of the soft rack (6) is in transmission connection with the surface of the group A of rollers, and the edge of the soft rack (6) is in transmission connection with the surface of the group B of rollers.
7. The crane automatic locking hook as claimed in claim 1, wherein: the track of the sliding chute (3) is consistent with the outline of the outer side of the hook body, and the tail end of the sliding chute (3) penetrates through the inner side of the hook head of the hook body (1).
8. The crane automatic locking hook as claimed in claim 1, wherein: the clamping ring (5) is concentric with a lifting hook circular arc of the hook body (1), a clamping groove (12) is formed in the inner side of the hook body (1), and the clamping groove (12) is located on a rotating track of the clamping ring (5).
9. The crane automatic locking hook as claimed in claim 8, wherein: the clamping ring (5) is connected to the inside of the sliding groove (3) in a sliding mode, and the clamping ring (5) can penetrate through the sliding groove (3) and be inserted into the clamping groove (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342360.5A CN111483918A (en) | 2020-04-27 | 2020-04-27 | Automatic locking hook of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342360.5A CN111483918A (en) | 2020-04-27 | 2020-04-27 | Automatic locking hook of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111483918A true CN111483918A (en) | 2020-08-04 |
Family
ID=71813081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010342360.5A Pending CN111483918A (en) | 2020-04-27 | 2020-04-27 | Automatic locking hook of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111483918A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336069A (en) * | 2021-08-06 | 2021-09-03 | 纽科伦（新乡）起重机有限公司 | Automatic snatch hoist of ton bag |
| CN115893184A (en) * | 2023-03-10 | 2023-04-04 | 济宁四通工程机械有限公司 | Hanging device |
| CN116986451A (en) * | 2023-09-27 | 2023-11-03 | 江苏卫华海洋重工有限公司 | Lifting device for manufacturing special equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1576468A2 (en) * | 1988-09-19 | 1990-07-07 | Производственное объединение "Новокраматорский машиностроительный завод" | Hook |
| KR20020050312A (en) * | 2000-12-21 | 2002-06-27 | 이구택 | Apparatus for preventing separation of hook |
| CN202643097U (en) * | 2012-04-12 | 2013-01-02 | 天津工业大学 | Anti-falling lifting hook |
| CN106629384A (en) * | 2015-10-28 | 2017-05-10 | 天津天纺高新物流有限公司 | A processing process of a lifting hook for logistic loading and unloading |
| CN206477702U (en) * | 2016-12-27 | 2017-09-08 | 王群 | A kind of Intelligent external bicycle lock |
| CN208585956U (en) * | 2018-07-26 | 2019-03-08 | 中铝瑞闽股份有限公司 | A kind of slide rail type anticreep hook structure |
| CN209890079U (en) * | 2019-05-10 | 2020-01-03 | 新乡市豫飞机械制造股份有限公司 | Lifting hook device for crane |
| CN210214560U (en) * | 2019-08-07 | 2020-03-31 | 新乡市长江起重机械有限公司 | Unhooking-proof lifting hook |
-
2020
- 2020-04-27 CN CN202010342360.5A patent/CN111483918A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1576468A2 (en) * | 1988-09-19 | 1990-07-07 | Производственное объединение "Новокраматорский машиностроительный завод" | Hook |
| KR20020050312A (en) * | 2000-12-21 | 2002-06-27 | 이구택 | Apparatus for preventing separation of hook |
| CN202643097U (en) * | 2012-04-12 | 2013-01-02 | 天津工业大学 | Anti-falling lifting hook |
| CN106629384A (en) * | 2015-10-28 | 2017-05-10 | 天津天纺高新物流有限公司 | A processing process of a lifting hook for logistic loading and unloading |
| CN206477702U (en) * | 2016-12-27 | 2017-09-08 | 王群 | A kind of Intelligent external bicycle lock |
| CN208585956U (en) * | 2018-07-26 | 2019-03-08 | 中铝瑞闽股份有限公司 | A kind of slide rail type anticreep hook structure |
| CN209890079U (en) * | 2019-05-10 | 2020-01-03 | 新乡市豫飞机械制造股份有限公司 | Lifting hook device for crane |
| CN210214560U (en) * | 2019-08-07 | 2020-03-31 | 新乡市长江起重机械有限公司 | Unhooking-proof lifting hook |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336069A (en) * | 2021-08-06 | 2021-09-03 | 纽科伦（新乡）起重机有限公司 | Automatic snatch hoist of ton bag |
| CN115893184A (en) * | 2023-03-10 | 2023-04-04 | 济宁四通工程机械有限公司 | Hanging device |
| CN116986451A (en) * | 2023-09-27 | 2023-11-03 | 江苏卫华海洋重工有限公司 | Lifting device for manufacturing special equipment |
| CN116986451B (en) * | 2023-09-27 | 2023-12-08 | 江苏卫华海洋重工有限公司 | Lifting device for manufacturing special equipment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200804 |