CN114044093B - A connecting rod type self-locking mechanism for a boat cradle - Google Patents
A connecting rod type self-locking mechanism for a boat cradle Download PDFInfo
- Publication number
- CN114044093B CN114044093B CN202111521773.0A CN202111521773A CN114044093B CN 114044093 B CN114044093 B CN 114044093B CN 202111521773 A CN202111521773 A CN 202111521773A CN 114044093 B CN114044093 B CN 114044093B
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- locking mechanism
- keel block
- iii
- self
- 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.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 50
- 239000004519 grease Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/40—Use of lowering or hoisting gear
- B63B23/60—Additional connections between boat and davits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/62—Fastening or storing of boats on deck
- B63B23/66—Blocks; Chocks
- B63B23/68—Blocks; Chocks for stacking boats
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
本发明公开了一种艇架用连杆式自锁机构，艇架上设有自锁机构，自锁机构与设于动滑轮两侧中心的轴体相连，所述的自锁机构包括连杆Ⅰ、连杆Ⅱ和连杆Ⅲ，连杆Ⅰ和连杆Ⅱ的形状为L形，连杆Ⅰ的长边和短边相交处设有弧形槽口，连杆Ⅰ的长边的中部与艇架铰接于A点，连杆Ⅰ的长边顶部与连杆Ⅱ的长边顶部铰接于B点，连杆Ⅱ的长边和连杆Ⅲ均为圆弧形，连杆Ⅱ的内圆弧与连杆Ⅲ的外圆弧相贴合，连杆Ⅱ的短边与连杆Ⅲ的左端铰接于C点，连杆Ⅲ的右端与艇架铰接于D点，连杆Ⅱ的长边底部设有穿线眼板，控制绳的一端与艇架上的吊环相连，另一端先后穿过船体结构上的滑轮、穿线眼板、艇架底部的滑轮最后与遥控锁紧保护装置相连。
The invention discloses a connecting rod type self-locking mechanism for a davit. The davit is provided with a self-locking mechanism, which is connected to shaft bodies arranged at the centers of both sides of a movable pulley. The self-locking mechanism comprises connecting rods I, II and III. The connecting rods I and II are in an L-shape. An arc notch is arranged at the intersection of the long side and the short side of the connecting rod I. The middle part of the long side of the connecting rod I is hinged to the davit at point A. The top of the long side of the connecting rod I is hinged to the top of the long side of the connecting rod II at point B. The long side of the connecting rod II and the connecting rod III are both arc-shaped. The inner arc of the connecting rod II is fitted with the outer arc of the connecting rod III. The short side of the connecting rod II is hinged to the left end of the connecting rod III at point C. The right end of the connecting rod III is hinged to the davit at point D. A threading eye plate is arranged at the bottom of the long side of the connecting rod II. One end of the control rope is connected to a lifting ring on the davit, and the other end successively passes through a pulley on a hull structure, the threading eye plate, and a pulley at the bottom of the davit, and is finally connected to a remote control locking protection device.
Description
Technical Field
The invention relates to a connecting rod type self-locking mechanism for a keel block.
Background
The boat frame is arranged as shown in figure 1, is arranged on the roof structure of the boat body and is used for accommodating the lifeboats, and is a main bearing device of the lifeboats and a storage and fixing device of the lifeboats.
The hoisting steel wire rope is wound on the keel block, one end of the hoisting steel wire rope is connected to a winding drum of the lifting winch through a guide pulley, the other end of the hoisting steel wire rope is also connected to an eye plate at the tail end of the keel block through the guide pulley, and the hoisting rope is connected with the lifeboat through a movable pulley connecting lifting ring. When the winch drum is lifted and rotated, the movable pulley drives the lifeboat to lift, and finally the lifeboat reaches the highest position of the keel block, namely the storage position of the lifeboat. However, if this state is maintained all the time, the hoist wire rope of the davit will be in a stressed and tensioned state all the time, which will directly affect the service life of the hoist wire rope.
In order to prolong the service life of the hoisting steel wire rope, a mechanism is required to be invented, and the hoisting steel wire rope is used for bearing the load of the lifeboat instead of the hoisting steel wire rope at the storage position of the lifeboat and is reliably self-locked, so that the hoisting steel wire rope is unloaded. When emergency occurs, the mechanism can be opened quickly, and the retraction of the lifeboat is not affected.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a connecting rod type self-locking mechanism for a keel block.
The utility model provides a connecting rod formula self-locking mechanism for keel block, includes the keel block, the keel block be fixed in on the hull structure, the afterbody of keel block is equipped with terminal eye plate, hang heavy wire rope's one end and tie on terminal eye plate, hang heavy wire rope's the other end and pass the corner pulley of keel block head, the movable pulley of corner pulley below again, and pass the fixed pulley behind the corner pulley and link to each other with the reel of lift winch, locate the structural symmetry of keel block on the left and right sides, be equipped with self-locking mechanism on the keel block, self-locking mechanism links to each other with the axis body that locates the movable pulley both sides center, self-locking mechanism include connecting rod I, connecting rod II and connecting rod III, connecting rod I and connecting rod II's shape are L shape, connecting rod I's long limit and short limit crossing department are equipped with the arc notch, connecting rod I's long limit middle part is articulated in the A point with the keel block, connecting rod I's long limit top is articulated in the B point with connecting rod II's long limit top, connecting rod II's long limit and connecting rod III are arc-shaped, connecting rod II's interior and connecting rod III's outer arc looks laminating, connecting rod II's the minor face is articulated in C point, connecting rod III's left end is articulated in C point and C end and connecting rod III is equipped with the end of the eye plate, the end of threading device is continuous with the end on the hull, the end of the control eye plate, the end is continuous with the end of the control device on the keel block, the end is connected with the end of the end on the keel block, the end is connected with the end of the control device.
As a further improvement, the bottom of the movable pulley is provided with a hanging ring, and the hanging ring is connected with the lifeboat.
As a further improvement, the connection mode of the tail end eye plate and the keel block is welded connection or connection through bolts.
As a further improvement, the joints of the connecting rods are coated with lubricating grease.
As a further improvement, the connecting rod I, the connecting rod II and the connecting rod III are all made of stainless steel.
As a further improvement, the surfaces of the connecting rod I, the connecting rod II and the connecting rod III are all coated with rust-proof primer.
Advantageous effects
The novel connecting rod type self-locking mechanism is ingenious in design, the novel connecting rod type self-locking mechanism skillfully utilizes the self-structure form, can effectively bear load and form self-locking under the storage state of the device, enables the hoisting steel wire rope to be unloaded, and cannot rely on the dead weight of the load to open the mechanism no matter how the load changes. When the self-locking mechanism needs to be opened, the connecting rod II must be manually shifted to rotate clockwise for a certain angle. In addition, the whole rotation process of the self-locking mechanism can not interfere with the movable pulley shaft, and the retraction of the lifeboat is not affected.
Drawings
Fig. 1 is a general structural schematic diagram of a connecting rod type self-locking mechanism for a keel block;
FIG. 2 is a schematic diagram of a locking state of the link-type self-locking mechanism;
FIG. 3 is a schematic diagram of a dead point state of the connecting rod type self-locking mechanism;
FIG. 4 is a schematic diagram of the open position of the link-type self-locking mechanism;
FIG. 5 is a force diagram;
1. The ship comprises a tail end eye plate 2, a ship body structure 3, a keel block 4, a hoisting steel wire rope 5, a corner pulley 6, a self-locking mechanism 7, a movable pulley 8, a fixed pulley 9, a connecting rod I10, a connecting rod II 11, a connecting rod III 12, a movable pulley shaft body 13 and a limiting stop lever.
Detailed Description
The present invention will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present invention, which examples are provided for the purpose of illustrating the present invention only and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1-5, a connecting rod type self-locking mechanism for a keel block comprises a tail end eye plate 1, a hull structure 2, the keel block 3, a hoisting steel wire rope 4, a corner pulley 5, a self-locking mechanism 6, a movable pulley 7, a fixed pulley 8, a connecting rod I9, a connecting rod II10, a connecting rod III11, a movable pulley shaft 12 and a limiting stop lever 13.
The connecting rod type self-locking mechanism is arranged at the left side and the right side of the davit structure of the davit, is symmetrically arranged, mainly comprises a connecting rod I, a connecting rod II and a connecting rod III, and three connecting rods are arranged in the same plane. The connecting rod I and the connecting rod II are hinged to a point B, the connecting rod II and the connecting rod III are hinged to a point C, the inner circular arc of the connecting rod II can be attached to the outer circular arc of the connecting rod III, the connecting rod I is hinged to an axis A fixed on the keel block, and the connecting rod III is hinged to an axis D fixed on the keel block.
And (3) stress analysis:
When a load G is hung at the arc notch of the connecting rod I, the connecting rod I of the self-locking mechanism hooks the two ends of the shaft body of the movable pulley (which is equivalent to bearing the load), the connecting rod I receives the vertical downward acting force of G, the connecting rod I has the tendency of rotating clockwise around the shaft A, and at the moment, the connecting rod II can be driven to rotate clockwise or anticlockwise around the hinge point B.
If the link II rotates counterclockwise about the hinge point B, the link III will also rotate counterclockwise about the axis D due to the action of the link II. However, the inner arc of the connecting rod II is attached to the outer arc of the connecting rod III in design, the connecting rod II and the connecting rod III are in the same plane, and the fixed connecting rod II and the connecting rod III cannot actually rotate anticlockwise to form self-locking. The link II thus only has the possibility of rotating clockwise about the hinge point B and brings about a clockwise rotation of the link III about the axis D.
Again, in fig. 2, the straight line connecting the two points BD is L-L, the straight line connecting the two points CD is M-M, and the angle between the straight line L-L and M-M is α. It can be seen from the observation that the hinge point C of the connecting rod II and the connecting rod III is below the straight line L-L, and the connecting rod mechanism can be actually seen as a quadrangle of A-B-C-D-A. Assuming that the link II is manually and actively shifted and the link III is driven to slowly rotate clockwise about the axis D (as shown by force F in fig. 2), when the point C falls on the straight line L-L (see fig. 3), the link mechanism can be seen as A triangle of A-B-C-A, and the triangle has stability (see fig. 5), the link mechanism will be locked, and no matter how the value of G changes, the link mechanism will not rotate.
Continuing to actively toggle the link II and driving the link III to slowly rotate clockwise about the axis D (as shown by force F in fig. 4), the angle between the straight line M-M and the straight line L-L is β, which will also cause the link I to rotate clockwise. In practice, as long as the included angle beta is more than 0, the connecting rod I, the connecting rod II and the connecting rod III can be driven by the dead weight of G to respectively rotate clockwise until the rotation of the connecting rod I touches the limiting stop rod. At the moment, the rotation angle of the connecting rod I is gamma, the angle gamma is required to completely meet the lowering of the movable pulley and the load, and the connecting rod I cannot interfere with a movable pulley shaft after the angle gamma is rotated.
In summary, when the hinge point C is below the straight line L-L, the connecting rod II and the connecting rod III in the connecting rod mechanism have a tendency to rotate counterclockwise, and the mechanism is self-locking.
When the hinging point C is on the straight line L-L, the connecting rod mechanism forms a triangle, which is dead point, and the mechanism is self-locking.
When the hinge point C is above the straight line L-L, the connecting rod II and the connecting rod III in the connecting rod mechanism have clockwise rotation trend, and the mechanism is opened.
The hinge point C must go over an angle a from the storage to the open position and cannot rotate the mechanism by means of the load's own weight, regardless of the load variation. The self-locking mechanism is required to be opened only by pulling the eye plate of the connecting rod II clockwise through the remote control cable in fig. 1.
In the storage state, in order to ensure that the connecting rod II of the self-locking mechanism does not rotate clockwise accidentally due to factors such as vibration and the like, a remote control rope can be arranged to pull the self-locking mechanism downwards so as to play a role in protection.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a connecting rod formula self-locking mechanism for keel block, includes the keel block, the keel block be fixed in on the hull structure, the afterbody of keel block is equipped with terminal eye plate, hang heavy wire rope's one end and tie on terminal eye plate, hang heavy wire rope's the other end and pass the corner pulley of keel block head, the movable pulley of corner pulley below again, and pass the fixed pulley at corner pulley rear and link to each other with the reel of lift winch, its characterized in that is equipped with self-locking mechanism on the keel block, self-locking mechanism links to each other with the axis body that locates the movable pulley both sides center, self-locking mechanism include connecting rod I, connecting rod II and connecting rod III, connecting rod I and connecting rod II's shape is L shape, the crossing department of crossing of long limit and minor face is equipped with the arc notch, connecting rod I's long limit middle part articulates in the A point with the keel block, connecting rod I's long limit top articulates in the B point with connecting rod II's long limit top, connecting rod II's long limit and connecting rod III are convex, connecting rod II's interior is the laminating mutually with connecting rod III's outer arc, connecting rod II's the left end articulates in C point, connecting rod III's right end is articulated with connecting rod III's right end and the boss of keel block and connecting rod I is equipped with the end, the end of connecting rod II is continuous with the control device of wire rope on the hull, the end of threading device, the end is passed through the end on the end of the control eye plate, the end is continuous with the end on the hull, the end of the control device.
2. The connecting rod type self-locking mechanism for the keel block according to claim 1, wherein the bottom of the movable pulley is provided with a hanging ring, and the hanging ring is connected with the lifeboat.
3. The connecting rod type self-locking mechanism for the keel block according to claim 1, wherein the tail end eye plate is connected with the keel block in a welding mode or a bolt mode.
4. The connecting rod type self-locking mechanism for the keel block according to claim 1, wherein the hinge joint of the connecting rods is coated with lubricating grease.
5. The connecting rod type self-locking mechanism for the keel block according to claim 1, wherein the connecting rods I, II and III are made of stainless steel.
6. The connecting rod type self-locking mechanism for the keel block according to claim 1, wherein the surfaces of the connecting rod I, the connecting rod II and the connecting rod III are coated with rust-proof primer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521773.0A CN114044093B (en) | 2021-12-13 | 2021-12-13 | A connecting rod type self-locking mechanism for a boat cradle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521773.0A CN114044093B (en) | 2021-12-13 | 2021-12-13 | A connecting rod type self-locking mechanism for a boat cradle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114044093A CN114044093A (en) | 2022-02-15 |
| CN114044093B true CN114044093B (en) | 2024-12-24 |
Family
ID=80212720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111521773.0A Active CN114044093B (en) | 2021-12-13 | 2021-12-13 | A connecting rod type self-locking mechanism for a boat cradle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114044093B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216508907U (en) * | 2021-12-13 | 2022-05-13 | 中船绿洲镇江船舶辅机有限公司 | Connecting rod type self-locking mechanism for boat davit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8306943L (en) * | 1983-12-15 | 1985-06-16 | Welin Ab | DEVERTANORDNING |
| CN105711748A (en) * | 2014-12-05 | 2016-06-29 | 江阴市北海救生设备有限公司 | Self-locked hook |
| CN207608196U (en) * | 2017-11-28 | 2018-07-13 | 上海孚来迪自动化科技有限公司 | A kind of vacuum absorbing and hoisting machine upset connecting rod self-locking mechanism |
| CN108423128B (en) * | 2018-03-20 | 2023-09-08 | 上海科得威船舶技术工程有限公司 | Rope ladder stop self-locking device |
| CN213229056U (en) * | 2020-08-27 | 2021-05-18 | 无锡市明子机械制造有限公司 | Novel lifeboat release hook |
-
2021
- 2021-12-13 CN CN202111521773.0A patent/CN114044093B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216508907U (en) * | 2021-12-13 | 2022-05-13 | 中船绿洲镇江船舶辅机有限公司 | Connecting rod type self-locking mechanism for boat davit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114044093A (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7845296B1 (en) | Marine lifting apparatus | |
| CN106672817B (en) | A ship anti-rolling crane | |
| CN216508907U (en) | Connecting rod type self-locking mechanism for boat davit | |
| CN220520000U (en) | Equipment quick lifting device on ship | |
| JP5732540B2 (en) | Fixing and releasing device for pulley device | |
| CN114044093B (en) | A connecting rod type self-locking mechanism for a boat cradle | |
| JP3258493B2 (en) | Anti-vibration device for suspended load using ship's up-down type frame | |
| CN114408769B (en) | Balance and safety device for steel wire rope of crane | |
| US2986750A (en) | Connecting means for launching and recovery of water-borne craft from and to ships | |
| JPH11228071A (en) | Multifunctional lifter | |
| CN214003854U (en) | An electric double girder bridge crane | |
| CN109534187A (en) | A kind of hanging method suitable for radial type A-frame on full circle swinging floating-crane ship | |
| CN210064985U (en) | Liftable single armed boat raft gallows and hoist | |
| CN110902553A (en) | Lifting hook for crane | |
| CN222249827U (en) | Folding arm marine A-frame | |
| CN118894452B (en) | Method for using a lifting device for a ship | |
| CN215904690U (en) | Rescue boat support of high-efficient release | |
| CN222475936U (en) | Auxiliary lifting device for ship maintenance | |
| CN220131755U (en) | Amplitude limiting device for crane boom | |
| CN220845138U (en) | Grab bucket gantry crane | |
| CN212832481U (en) | Marine crane convenient to maintain and overhaul | |
| JPS586860Y2 (en) | floating crane | |
| CN222331348U (en) | Wear-resistant steel wire rope sling | |
| CN209668643U (en) | Cable Stabilization System for Offshore Floating Cranes | |
| CN221420429U (en) | Automatic hook collecting device of marine crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |