CN111573550B - Agricultural lifting device stall self-locking assembly utilizing electromagnetic pole-changing principle - Google Patents
Agricultural lifting device stall self-locking assembly utilizing electromagnetic pole-changing principle Download PDFInfo
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- CN111573550B CN111573550B CN202010420043.0A CN202010420043A CN111573550B CN 111573550 B CN111573550 B CN 111573550B CN 202010420043 A CN202010420043 A CN 202010420043A CN 111573550 B CN111573550 B CN 111573550B
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- clamping jaw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/04—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes actuated by centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The utility model provides an utilize agricultural hoisting device stall auto-lock subassembly of electromagnetism pole-changing principle, relates to agricultural technical field, including the installation base, the top swing joint of installation base has main hoisting wheel, the front swing joint of main hoisting wheel has self-locking mechanism, the right side of main hoisting wheel is provided with vice hoisting wheel. This utilize agricultural hoisting device stall auto-lock subassembly of electromagnetism pole-changing principle can be at the device normal during operation, do not influence the normal use of equipment, when stall whereabouts appears in the overhead hoist, in time with hoisting device's pivot auto-lock, prevent it to continue to descend, the property and personnel loss of having avoided probably existing, very big assurance site construction personnel's safety, the practicality and the security of equipment have been improved, not only accord with the requirement of country to safety in production more, also can improve agricultural product operator's production efficiency, further increase its income. Compared with the prior art, the reliability is higher.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a stall self-locking assembly of an agricultural lifting device by utilizing an electromagnetic pole-changing principle.
Background
With the development of modern technology, agricultural equipment is gradually developed to automation and mechanization, and compared with the traditional manual work, the agricultural equipment not only improves the production efficiency, but also saves a large amount of time.
The grain yield of China is continuously increased in recent years, and the domestic reserves are sufficient, so that part of agricultural products are exported or deeply processed to create higher value. When agricultural products are exported, the agricultural products are generally transported by ships at sea in consideration of cost, and are lifted by using equipment such as a crane at a loading dock. Because the mass of once handling is great, and receive the effect of dead weight, gravitation and gravity in the handling removal process, often the actual weight that hoisting equipment's hoisting device bore is greater than the weight of the thing of handling. Frequent handling operation may lead to the phenomenon of hoisting device stall to appear because machinery is tired or weight is overweight, and handling thing descends fast promptly, has very big potential safety hazard to field operation personnel, does not conform to the requirement of country to the safety in production, and simultaneously, the stall not only can cause the damage of equipment, still can lead to the handling thing to bear the additional loss, to the operator of agricultural product, seriously influences its income.
In order to solve the problems, the inventor provides an agricultural lifting device stall self-locking assembly utilizing an electromagnetic pole-changing principle, the agricultural lifting device stall self-locking assembly has the advantages of stall self-locking and falling prevention, when the device normally works, the normal use of equipment is not influenced, when a lifting device stalls and falls, a rotating shaft of the lifting device is self-locked in time to prevent the lifting device from continuously falling, possible property and personnel loss is avoided, the safety of site constructors is greatly guaranteed, the practicability and the safety of the equipment are improved, the requirements of the state on safe production are met better, the production efficiency of agricultural product operators can be improved, and the income of the agricultural product operators is further increased. Compared with the prior art, the reliability is higher.
Disclosure of Invention
In order to realize the purposes of stall self-locking and falling prevention, the invention provides the following technical scheme: the utility model provides an utilize agricultural hoisting device stall auto-lock subassembly of electromagnetism pole change principle, includes installation base, main lifting wheel, self-locking mechanism, vice lifting wheel, positioning disk, locking mechanical system, mounting disc, roller bearing, auto-lock piece, pole change mechanism, jack catch one, jack catch two, spacing spring, balancing weight, return spring, movable contact, spacing groove, fixed contact, positive current contact, negative current contact, casing, current variant, fixture block, reset spring.
The positions and the connection relations of the structures are as follows:
the top of the mounting base is movably connected with a main lifting wheel, the front of the main lifting wheel is movably connected with a self-locking mechanism, and the right side of the main lifting wheel is provided with an auxiliary lifting wheel;
the self-locking mechanism comprises a positioning disc, a locking mechanism is movably connected inside the positioning disc, an installation disc is movably connected inside the positioning disc, a rolling shaft is fixedly connected to the front side of the installation disc, a self-locking block is movably connected to the outer side of the installation disc, and a pole changing mechanism is movably connected to the front side of the installation disc;
the pole changing mechanism comprises a first clamping jaw, a second clamping jaw is movably connected to the left side of the first clamping jaw, a limiting spring is arranged between the first clamping jaw and the second clamping jaw, a balancing weight is fixedly connected to the outer side of the second clamping jaw, a return spring is arranged between the first clamping jaw and the second clamping jaw, a movable contact is fixedly connected to the bottom of the return spring, a limiting groove is formed in the back of the movable contact, a fixed contact is arranged below the movable contact, and a positive current contact and a negative current contact are respectively arranged on the outer side of the second clamping jaw;
the locking mechanism comprises a shell, an electrorheological body is arranged in the shell, a clamping block is movably connected in the shell, and a return spring is fixedly connected to the outer side of the clamping block.
Preferably, in the initial state, the distance between the first jaw and the second jaw is smaller than the size of the movable contact, and the movable contact is limited in position.
Preferably, the housing is provided with a cavity inside, and the electrorheological fluid is located inside the cavity.
Preferably, the size of the housing is larger than the maximum moving stroke of the latch.
Preferably, the end of the latch is provided with an obtuse-angle-shaped protrusion structure, so that friction force when the latch contacts with the self-locking block can be reduced.
Compared with the prior art and products, the invention has the beneficial effects that:
this utilize agricultural hoisting device stall auto-lock subassembly of electromagnetism pole-changing principle can be at the device normal during operation, do not influence the normal use of equipment, when stall whereabouts appears in the overhead hoist, in time with hoisting device's pivot auto-lock, prevent it to continue to descend, the property and personnel loss of having avoided probably existing, very big assurance site construction personnel's safety, the practicality and the security of equipment have been improved, not only accord with the requirement of country to safety in production more, also can improve agricultural product operator's production efficiency, further increase its income. Compared with the prior art, the reliability is higher.
Drawings
FIG. 1 is a front view of the structural attachment of the present invention;
FIG. 2 is a schematic view of the connection structure of the self-locking mechanism of the present invention;
FIG. 3 is a schematic view of the connection structure of the pole-changing mechanism of the present invention;
FIG. 4 is a schematic diagram of the movement traces of the structures shown in FIG. 3 according to the present invention;
FIG. 5 is a schematic view of the connection structure of the locking mechanism and the self-locking block of the present invention;
FIG. 6 is a schematic diagram of the movement traces of the structures of FIG. 5 according to the present invention;
FIG. 7 is an enlarged view of the structure of FIG. 5A in accordance with the present invention;
FIG. 8 is an enlarged view of the structure of FIG. 6 at B according to the present invention.
In the figure: 1. installing a base; 2. a main lifting wheel; 3. a self-locking mechanism; 4. an auxiliary lifting wheel; 31. positioning a plate; 32. a locking mechanism; 33. mounting a disc; 34. a roller; 35. a self-locking block; 36. a pole changing mechanism; 360. a first clamping jaw; 361. a second jaw; 362. a limiting spring; 363. a balancing weight; 364. a return spring; 365. a movable contact; 366. a limiting groove; 367. a fixed contact; 368. a positive current contact; 369. a negative current contact; 320. a housing; 321. an electrorheological fluid; 322. a clamping block; 323. a return spring;
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.
Please refer to fig. 1-8:
the stall self-locking assembly of the agricultural lifting device utilizing the electromagnetic pole-changing principle comprises a mounting base 1, a main lifting wheel 2, a self-locking mechanism 3, an auxiliary lifting wheel 4, a positioning disc 31, a locking mechanism 32, a mounting disc 33, a rolling shaft 34, a self-locking block 35, a pole-changing mechanism 36, a first jaw 360, a second jaw 361, a limiting spring 362, a balancing weight 363, a return spring 364, a movable contact 365, a limiting groove 366, a fixed contact 367, a positive current contact 368, a negative current contact 369, a shell 320, a current variant 321, a clamping block 322 and a return spring 323.
The initial positions and the connection relations of the structures are as follows:
the top of the mounting base 1 is movably connected with a main lifting wheel 2, the front of the main lifting wheel 2 is movably connected with a self-locking mechanism 3, and the right side of the main lifting wheel 2 is provided with an auxiliary lifting wheel 4;
the self-locking mechanism 3 comprises a positioning disc 31, a locking mechanism 32 is movably connected inside the positioning disc 31, a mounting disc 33 is movably connected inside the positioning disc 31, a rolling shaft 34 is fixedly connected to the front of the mounting disc 33, a self-locking block 35 is movably connected to the outer side of the mounting disc 33, and a pole-changing mechanism 36 is movably connected to the front of the mounting disc 33;
the pole-changing mechanism 36 comprises a first jaw 360, a second jaw 361 is movably connected to the left side of the first jaw 360, a limiting spring 362 is arranged between the first jaw 360 and the second jaw 361, a balancing weight 363 is fixedly connected to the outer side of the second jaw 361, a return spring 364 is arranged between the first jaw 360 and the second jaw 361, a movable contact 365 is fixedly connected to the bottom of the return spring 364, a limiting groove 366 is arranged on the back of the movable contact 365, a fixed contact 367 is arranged below the movable contact 365, and a positive current contact 368 and a negative current contact 369 are respectively arranged on the outer side of the second jaw 361;
the locking mechanism 32 includes a housing 320, an electrorheological fluid 321 is disposed inside the housing 320, a latch 322 is movably connected inside the housing 320, and a return spring 323 is fixedly connected to an outer side of the latch 322.
Wherein:
a. the axes of the main lifting wheel 2, the positioning disc 31, the mounting disc 33 and the roller 34 are collinear. In the initial state, the distance between the first jaw 360 and the second jaw 361 is smaller than the size of the movable contact 365, and the movable contact 365 is limited in position.
b. The number of the locking mechanisms 32 is not less than ten, the specifications of the locking mechanisms 32 are the same, the locking mechanisms 32 are uniformly distributed by taking the circle center of the positioning disc 31 as a reference, and the distance between every two adjacent locking mechanisms 32 is matched with the size of the self-locking block 35; from locking piece 35 is provided with and is no less than five and the specification is all the same to the centre of a circle of mounting disc 33 is evenly distributed for the reference, and its shape is curved surface form and top corner sets up to radius angle.
c. The pole changing mechanisms 36 are provided in two and have the same specification, and are symmetrically distributed with reference to the center of the mounting disk 33. The interior of the housing 320 is provided with a cavity, inside which the current transformer 321 is located.
Wherein:
d. the first jaw 360 and the second jaw 361 are the same in shape, L-shaped and distributed oppositely; the first jaw 360 is made of magnetic materials, a magnetic pole displays an N pole, the outer side of the second jaw 361 is provided with a coil, and the coil is in contact with a positive current contact 368 to display an S pole and is in contact with a negative current contact 369 to display an N pole; the current direction of the positive current contact 368 and the negative current contact 369 are set in opposite directions. The end of the latch 322 is provided with an obtuse-angle protrusion structure, so that the friction force when contacting the self-locking block 35 can be reduced.
e. The movable contact 365 and the fixed contact 367 are provided with current passing through and are respectively electrically connected with the current transformer 321; the movable contact 365 is in sliding connection with the limiting groove 366, and lubricating liquid is arranged in the limiting groove 366; the limit groove 366 is formed inside the mounting plate 33, and the movable contact 365, the fixed contact 367, the positive current contact 368, and the negative current contact 369 are formed on the surface of the mounting plate 33.
f. The main materials of the current transformer 321 are gypsum, lime, carbon powder and olive oil, and the current transformer 321 is in a solid state in an electrified state and in a liquid state in a non-electrified state. The size of the housing 320 is larger than the maximum moving stroke of the latch 322.
When the device is used, in an initial state, the lifting speed of the roller 34 and the mounting disc 33 is normal, no extra centrifugal force is generated, the second jaw 361 is in contact with the positive current contact 368, the first jaw 360 is made of magnetic materials, the magnetic pole displays an N pole, the outer side of the second jaw 361 is provided with a coil, the coil is in contact with the positive current contact 368 to display an S pole, and the coil is in contact with the negative current contact 369 to display an N pole; the current directions of the positive current contact 368 and the negative current contact 369 are set to be opposite, so that the second jaw 361 shows an S pole, and opposite attraction is formed between the second jaw 360 and the first jaw, so that the position of the movable contact 365 is limited and the movable contact 365 cannot be contacted with the fixed contact 367. At this time, no current-through circuit is generated in the current variant 321, and the current variant 321 is in a liquid state and can be extruded into the shell 320 by the self-locking block 35, so that the normal operation of the device is not affected.
When the stalling phenomenon occurs on the mounting disc 33 and the roller 34, the rotating speed of the mounting disc is suddenly increased, the instantaneous centrifugal force is increased, the second jaw 361 starts to move under the action of the centrifugal motion of the balancing weight 363 and finally contacts with the negative current contact 369, the second jaw 361 shows an N pole at the moment, the phenomenon of like-pole repulsion is formed between the second jaw and the first jaw 360, the repulsion is that the distance between the second jaw and the first jaw is increased, the movable contact 365 is not limited any longer, at the moment, the movable contact 365 moves downwards under the action of the return spring 364 and finally contacts with the fixed contact 367, and at the moment, a complete current path is formed.
At this time, a current path exists in the current variant 321, the current path changes from liquid to solid, the self-locking piece 35 is limited and cannot move, and the mounting plate 33 and the roller 34 are stopped synchronously, so that the stall is prevented from falling.
The above structure and process are shown in FIGS. 2-8.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides an utilize agricultural hoisting device stall auto-lock subassembly of electromagnetism pole-changing principle, includes installation base (1), its characterized in that: the top of the mounting base (1) is movably connected with a main lifting wheel (2), the front of the main lifting wheel (2) is movably connected with a self-locking mechanism (3), and the right side of the main lifting wheel (2) is provided with an auxiliary lifting wheel (4);
the self-locking mechanism (3) comprises a positioning disc (31), a locking mechanism (32) is movably connected inside the positioning disc (31), an installation disc (33) is movably connected inside the positioning disc (31), a rolling shaft (34) is fixedly connected to the front of the installation disc (33), a self-locking block (35) is movably connected to the outer side of the installation disc (33), and a pole changing mechanism (36) is movably connected to the front of the installation disc (33);
the pole changing mechanism (36) comprises a first clamping jaw (360), a second clamping jaw (361) is movably connected to the left side of the first clamping jaw (360), a limiting spring (362) is arranged between the first clamping jaw (360) and the second clamping jaw (361), a balancing weight (363) is fixedly connected to the outer side of the second clamping jaw (361), a return spring (364) is arranged between the first clamping jaw (360) and the second clamping jaw (361), a movable contact (365) is fixedly connected to the bottom of the return spring (364), a limiting groove (366) is arranged on the back of the movable contact (365), a fixed contact (367) is arranged below the movable contact (365), and a positive current contact (368) and a negative current contact (369) are respectively arranged on the outer side of the second clamping jaw (361); the first clamping jaw (360) and the second clamping jaw (361) are identical in shape, L-shaped and distributed oppositely; the first jaw (360) is made of magnetic materials, the magnetic pole of the first jaw shows an N pole, the outer side of the second jaw (361) is provided with a coil, the coil is in contact with the positive current contact (368) to show an S pole, and the coil is in contact with the negative current contact (369) to show an N pole; the current directions of the positive current contact (368) and the negative current contact (369) are set to be opposite;
the locking mechanism (32) comprises a shell (320), an electrorheological body (321) is arranged inside the shell (320), a clamping block (322) is movably connected inside the shell (320), and a return spring (323) is fixedly connected to the outer side of the clamping block (322).
2. The agricultural lifting device stall self-locking assembly based on the electromagnetic pole-changing principle of claim 1, wherein: the axes of the main lifting wheel (2), the positioning disc (31), the mounting disc (33) and the rolling shaft (34) are on the same straight line.
3. The agricultural lifting device stall self-locking assembly based on the electromagnetic pole-changing principle of claim 1, wherein: the number of the locking mechanisms (32) is not less than ten, the specifications of the locking mechanisms are the same, the locking mechanisms (32) are uniformly distributed by taking the circle center of the positioning disc (31) as a reference, and the distance between every two adjacent locking mechanisms (32) is matched with the size of the self-locking block (35); from locking piece (35) be provided with be no less than five and the specification is the same to the centre of a circle of mounting disc (33) is evenly distributed for reference, and its shape is curved surface form and top corner sets up to radius angle.
4. The agricultural lifting device stall self-locking assembly based on the electromagnetic pole-changing principle of claim 1, wherein: the pole changing mechanisms (36) are arranged in two and have the same specification, and are symmetrically distributed by taking the circle center of the mounting disc (33) as a reference.
5. The agricultural lifting device stall self-locking assembly based on the electromagnetic pole-changing principle of claim 1, wherein: the movable contact (365) and the fixed contact (367) are provided with current passing and are respectively and electrically connected with the current variant (321); the movable contact (365) is in sliding connection with the limiting groove (366), and lubricating liquid is arranged in the limiting groove (366); the limiting groove (366) is formed in the mounting disc (33), and the movable contact (365), the fixed contact (367), the positive current contact (368) and the negative current contact (369) are arranged on the surface of the mounting disc (33).
6. The agricultural lifting device stall self-locking assembly based on the electromagnetic pole-changing principle of claim 1, wherein: the main materials of the electrorheological fluid (321) are gypsum, lime, carbon powder and olive oil, and the electrorheological fluid (321) is solid in a power-on state and liquid in a non-power-on state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420043.0A CN111573550B (en) | 2020-05-18 | 2020-05-18 | Agricultural lifting device stall self-locking assembly utilizing electromagnetic pole-changing principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420043.0A CN111573550B (en) | 2020-05-18 | 2020-05-18 | Agricultural lifting device stall self-locking assembly utilizing electromagnetic pole-changing principle |
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| CN111573550A CN111573550A (en) | 2020-08-25 |
| CN111573550B true CN111573550B (en) | 2021-07-23 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010186A (en) * | 2020-08-27 | 2020-12-01 | 湖州南浔上福线缆有限公司 | Crane hanging scaffold stall self-locking mechanism based on cable hoisting |
| CN111973157B (en) * | 2020-08-30 | 2023-08-08 | 深圳市安泰医疗科技有限公司 | Laser scanning device for medical treatment |
| CN112158736A (en) * | 2020-09-21 | 2021-01-01 | 广州优品工程有限公司 | Stall self-locking device for building based on current variant principle |
| CN111996950A (en) * | 2020-09-21 | 2020-11-27 | 福今(广州)贸易有限公司 | Prevent that roof beam unusual whereabouts protection device when freight transportation discrepancy inspection |
| CN112276175A (en) * | 2020-10-19 | 2021-01-29 | 浙江火萌互娱信息技术有限公司 | Anti-stall device used during hole milling of hybrid heat exchanger |
| CN112158737A (en) * | 2020-10-29 | 2021-01-01 | 张忠勋 | Rail sling cart hoisting mechanism for preventing rail hoisting stall from hurting people |
| CN113104749A (en) * | 2021-03-26 | 2021-07-13 | 杭州荒楠信息技术有限公司 | Agricultural lifting device stall self-locking device based on centrifugal force principle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6374953B1 (en) * | 1999-11-30 | 2002-04-23 | Alan V. Casas | Vertical plunger brake control device |
| KR100945302B1 (en) * | 2009-06-23 | 2010-03-04 | (주)반도호이스트크레인 | A break for hoist |
| CN206126543U (en) * | 2016-06-29 | 2017-04-26 | 西继迅达（许昌）电梯有限公司 | Novel automatically, prevent one -way automatic re -setting overspeed governor of swift current car |
| CN210480703U (en) * | 2019-08-26 | 2020-05-08 | 中铁十二局集团安徽混凝土制品有限公司 | Anti-falling speed reducer for electric hoist crane |
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