CN106698137B

CN106698137B - Permanent magnet anti-falling device for steel guide rail

Info

Publication number: CN106698137B
Application number: CN201710015893.0A
Authority: CN
Inventors: 张儆伦
Original assignee: Chengdu Pisi Aviation Technology Co ltd
Current assignee: Chengdu Pisi Aviation Technology Co ltd
Priority date: 2017-01-10
Filing date: 2017-01-10
Publication date: 2023-06-06
Anticipated expiration: 2037-01-10
Also published as: CN106698137A

Abstract

The invention provides a permanent magnet anti-falling device for a steel guide rail, which comprises a shell, a first rotating shaft, a rotating rod, a torsion spring, a pull rope, a bevel gear, a second rotating shaft and a permanent magnet for adsorbing the steel guide rail, wherein the first rotating shaft, the rotating rod, the torsion spring, the pull rope, the bevel gear, the gear and the permanent magnet are arranged in the shell. The invention has the beneficial effects that: the invention is safe and reliable, has lower requirement on the use environment and does not need frequent maintenance.

Description

Permanent magnet anti-falling device for steel guide rail

Technical Field

The invention relates to the field of lifting systems, in particular to a permanent magnet anti-falling device for a steel guide rail.

Background

The traditional lifting system comprises a steel guide rail, a lifting basket and a power device. The lifting basket is used for bearing equipment which needs to be lifted to a preset height by the lifting system, the steel guide rail is used for limiting the movement track of the lifting basket in the operation process of the lifting basket and preventing the lifting basket from shaking, and the power device is used for providing power for lifting/lowering the lifting basket.

The wedge type anti-falling safety device used by the traditional elevator system has strict requirements on the use environment, the sensitivity of wedge type reaction is met by long-term lubrication of engine oil, the engine oil can be washed out after raining, and if the engine oil is stained with dust and dirt, the engine oil needs to be cleaned in time. The safety device needs frequent maintenance, is easy to rust after long-term work in an outdoor use environment, has slow response and even fails. The safety device has lower reliability, and if the maintenance is not timely, falling accidents are easy to happen.

There is also a means of adopting a rack and pinion type fall arrester, which has high reliability, but has a complicated internal structure and high manufacturing cost, and can bring about rust on gears and racks if not used for a long time, thereby bringing about problems such as reduction in reliability and even failure of the fall arrester, and causing unnecessary loss. The safety device is required to be provided with corresponding high-strength racks at the place where the safety device runs, and the number of racks is increased along with the increase of the use height of the lifting device, so that the use cost of the safety device is increased along with the increase of the use cost. The internal structure of the safety hook is complex, and the manufacturing cost of the safety hook is high. The gears and racks are easily rusted in the outdoor long-term non-working condition, causing unnecessary loss.

Both of the above fall arrest safety features the following disadvantages: 1. all the falling protector is additionally arranged outside the steel guide rail to install the holding rail, so that steel waste is caused; 2. when the device is installed, a larger space is required on a projection surface, so that the whole lifting system occupies a larger space, and the space of other devices is occupied; 3. if tiny foreign matters exist on the mounting rail of the anti-falling device, the surface of the guide rail is not smooth and flat, so that the anti-falling safety device is easy to malfunction, and the lifting system is blocked during operation; 4. the installation accuracy requirement of the falling protector installation rail is higher in the construction process. If deviation occurs in the perpendicularity of the falling protector mounting holding rail, misoperation is easy to occur when the falling protector operates, and the falling protector is clamped when the lifting system operates.

Disclosure of Invention

Therefore, the invention provides a permanent magnet anti-falling device for a steel guide rail, which solves the problems that the existing anti-falling means used by a lifting system has strict requirements on the use environment, needs frequent maintenance, has lower reliability, has higher manufacturing cost, wastes materials and space and is easy to cause the lifting system to be blocked.

The technical scheme of the invention is realized as follows: the utility model provides a permanent magnetism anti-falling device for on steel guide rail, includes the casing, still includes locates first pivot, dwang, torsional spring, stay cord, bevel gear, second pivot in the casing, be used for adsorbing the permanent magnet of steel guide rail, the permanent magnet is including fixed magnet, the moving magnet pivoted that set up for fixed magnet, be equipped with the second pivot that runs through moving magnet in the moving magnet, second pivot one end termination is in fixed magnet, the gear is connected to the second pivot other end, the gear is located in the second pivot and is driven the second pivot and rotate, bevel gear meshing is on the gear and cooperate with the gear, establish in the bevel gear and can drive bevel gear pivoted first pivot, first pivot both ends termination is in shells inner wall, the axis of first pivot, second pivot is mutually perpendicular, dwang one end is connected in first pivot, the dwang other end is worn out the casing and can be relative to the casing upper and lower motion, the torsional spring cover is located in first pivot, torsional spring one end termination is in the dwang, the torsional spring is in deviating from dwang side shells inner wall, the stay cord is worn out in the casing. When the rotating rod moves up and down relative to the shell, the first rotating shaft is driven to rotate, the bevel gear is driven to rotate by the first rotating shaft, the gear meshed with the bevel gear is driven to rotate by the bevel gear, the meshed gear and the bevel gear are mutually matched, the second rotating shaft arranged on the gear is driven to rotate by means of bevel gear transmission, the purpose of driving the moving magnet to rotate is finally achieved, and when the moving magnet rotates to the direction of the magnetic induction line of the moving magnet is consistent with the direction of the magnetic induction line of the fixed magnet, namely, when the magnetic pole directions of the moving magnet and the fixed magnet are consistent, the permanent magnet formed by the moving magnet and the fixed magnet is in strong magnetism, and the permanent magnet is tightly adsorbed on the steel guide rail. The safety device is not like a traditional wedge type anti-falling safety device, has the advantages that sensitivity is protected by other means, the requirement on the use environment is low, and frequent maintenance is not needed; the invention can be directly adsorbed on the steel guide rail, and the rail is held without additional falling protector, thereby saving steel and installation space and enabling the design of the lifting system to be more flexible; the clamping rail is not arranged on the anti-falling device, so that clamping between the anti-falling safety device and the anti-falling device clamping rail is not caused, the precision control requirement in the construction process of the lifting system can be relaxed, and the lifting system is simpler and faster to install; the lifting system can not be blocked due to misoperation of the falling protector, and the reliability is higher. The invention has simple structure, adopts the permanent magnet to adsorb the existing steel guide rail, and reduces the whole cost.

Further, an upper yoke is arranged at the top of the fixed magnet, a lower yoke is arranged at the bottom of the fixed magnet, the upper yoke is connected to the top of the shell, the lower yoke is connected to the bottom of the shell, and the movable magnet can rotate between the upper yoke and the lower yoke. The upper yoke iron is matched with the lower yoke iron, so that the fixed magnet can be better fixed, magnetic conduction can be better realized, and the permanent magnet can be more tightly adsorbed on the steel guide rail due to strong magnetism on the outer surface.

Further, a limiting block which is used for preventing the rotating rod from exceeding a preset position when rotating is arranged on the inner wall of the shell. The limit block is matched with the rotation angle of the rotating rod, the number of teeth of the bevel gear and the number of teeth of the gear to ensure that the direction of the magnetic induction line of the moving magnet is consistent with the direction of the magnetic induction line of the fixed magnet when the rotating rod reaches the final position.

Through the above disclosure, the beneficial effects of the invention are as follows:

1, the invention is safe and reliable, has lower requirement on the use environment and does not need frequent maintenance;

2, the invention can be directly adsorbed on the steel guide rail without additional falling protector for mounting the holding rail, and the beneficial effects brought are as follows: a. steel is saved; b. the installation space is saved, so that the design of the lifting system is more flexible; c. the clamping between the falling protector and the falling protector holding rail is not caused, so that the precision control requirement in the construction process of the lifting system can be relaxed, and the lifting system is simpler and faster to install; d. the invention has simple structure, adopts the permanent magnet to adsorb the existing steel guide rail, and reduces the whole cost;

and 3, the lifting system is not blocked due to misoperation of the falling protector, and the reliability is higher.

Drawings

Fig. 1 is a structural view of a permanent magnet fall protection device for a steel rail in a lifted state.

Fig. 2 is a structural view of the permanent magnet fall protection device for steel guide rail in a fall protection state.

Fig. 3 is a schematic structural view of a permanent magnet fall protection device for use on a steel rail.

The reference numerals are as follows:

the device comprises a shell, a first rotating shaft, a rotating rod 3, a torsion spring 4, a pull rope 5, a bevel gear 6, a gear 7, a second rotating shaft 8, a moving magnet 9, a fixed magnet 10, an upper yoke 11, a lower yoke 12, a steel guide rail 13, a basket 14, a power device 15 and a limiting block 16.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 3, the permanent magnet anti-falling device for the steel guide rail comprises a shell 1, and further comprises a first rotating shaft 2, a rotating rod 3, a torsion spring 4, a pull rope 5, a bevel gear 6, a gear 7, a second rotating shaft 8 and a permanent magnet for adsorbing the steel guide rail 13, wherein the first rotating shaft 2, the rotating rod 3, the torsion spring 4, the pull rope 5, the bevel gear 6, the gear 7 and the second rotating shaft 8 are arranged in the shell 1.

The permanent magnet comprises a fixed magnet 10 and a movable magnet 9 which is fixedly arranged and rotates relative to the fixed magnet 10, a second rotating shaft 8 which penetrates through the movable magnet 9 is arranged in the movable magnet 9, the second rotating shaft 8 drives the movable magnet 9 to rotate relative to the fixed magnet 10, one end of the second rotating shaft 8 is connected to the side wall of the fixed magnet 10, the other end of the second rotating shaft 8 is connected with a gear 7, the gear 7 is arranged on the second rotating shaft 8 and drives the second rotating shaft 8 to rotate, the bevel gear 6 is meshed with the gear 7 and is matched with the gear 7, a first rotating shaft 2 which can drive the bevel gear 6 to rotate is arranged in the bevel gear 6, two ends of the first rotating shaft 2 are connected to the inner wall of the shell 1, the axes of the first rotating shaft 2 and the second rotating shaft 8 are mutually perpendicular, one end of the rotating rod 3 is connected to the first rotating shaft 2, the other end of the rotating rod 3 penetrates out of the shell 1 and can move up and down relative to the shell 1, one end of the torsion spring 4 is sleeved on the first rotating shaft 2, the other end of the torsion spring 4 is connected to the rotating rod 3, the other end of the torsion spring 4 is connected to the side of the shell 1 which deviates from the inner wall of the shell 3, and the other end of the torsion rod 5 is connected to the pull rope 3.

Referring to fig. 3, for better fixing the fixed magnet 10 and better magnetic conduction, an upper yoke 11 is arranged at the top of the fixed magnet 10, a lower yoke 12 is arranged at the bottom of the fixed magnet 10, the upper yoke 11 is connected to the top of the shell 1, the lower yoke 12 is connected to the bottom of the shell 1, and the movable magnet 9 can rotate between the upper yoke 11 and the lower yoke 12.

In order to make the magnetic induction line direction of the moving magnet 9 and the magnetic induction line direction of the fixed magnet 10 coincide when the rotating rod 3 reaches the final position, a limiting block 16 for preventing the rotating rod 3 from exceeding a preset position when rotating is arranged on the inner wall of the shell 1.

Referring to fig. 1-2, the lifting system includes a steel rail 13, a basket 14, and a power unit 15. Wherein the basket 14 is used for bearing equipment which needs to be lifted to a preset height by a lifting system, and the steel guide rail 13 is used for limiting the running track of the basket 14 during the running process of the basket 14 and preventing the basket from shaking. One end of the pull rope 5 is connected with the rotating rod 3 penetrating out of the shell 1, and the other end of the pull rope 5 is connected with the power device 15. The steel guide rail 13, the basket 14 and the power unit 15 in this embodiment are not of the structure of the present invention, but are shown in fig. 1-2 for clarity of description of the positional relationship of the present invention thereto; with continued reference to fig. 1-2, the permanent magnetic anti-falling devices are two and symmetrically arranged at two ends of the lifting basket 14. Wherein, the casing 1 plays the effect of parcel shielding and supporting other components, and casing 1 uses the bolt or directly welds the installation on basket 14, and first pivot 2 is installed in casing 1 to can rotate for casing 1, dwang 3 one end and first pivot 2 rigid coupling, dwang 3 other end wear out casing 1, establish the slot hole of cooperation dwang 3 on the shell wall, dwang 3 can be in the slot hole up-and-down motion, can drive first pivot 2 and rotate together when dwang 3 rotates under the exogenic action. The torsion spring 4 is sleeved on the first rotating shaft 2, one end of the torsion spring 4 is fixed on the rotating rod 3, the other end of the torsion spring is fixed on the inner wall of the shell 1 at the side deviating from the rotating rod 3, when the rotating rod 3 rotates in the direction of compressing the torsion spring 4, the torsion spring 4 is compressed, a reverse torque (pretightening force) is generated on the rotating rod 3, and the bevel gear 6 is fixed on the first rotating shaft 2 and rotates along with the rotation of the first rotating shaft 2. One end of the second rotating shaft 8 is connected with the side wall of the fixed magnet 10, the other end of the second rotating shaft 8 is connected with the gear 7, and the gear 7 and the movable magnet 9 encircle the second rotating shaft 8 and can rotate around the second rotating shaft 8; the gear 7 is meshed with the bevel gear 6, so that the rotation of the bevel gear 6 parallel to the plane of the moving magnet 9 can be converted into the rotation of the gear 7 perpendicular to the plane direction of the moving magnet 9. The gear 7 is connected with the movable magnet 9 through bolts, when the gear 7 rotates, the movable magnet 9 can be driven to rotate together, the fixed magnet 10 is fixed on the side wall of the shell 1, for better magnetic conduction effect, the upper yoke 11 and the lower yoke 12 are fixed on the inner wall of the shell 1 and encircle the movable magnet 9 and the fixed magnet 10, and the limiting block 16 is fixed on the inner wall of the shell 1 and used for preventing the rotating rod 3 from exceeding a preset position when rotating.

Referring to fig. 1, one end of a pull rope 5 is fixed at the end of the rotating rod 3 penetrating out of the shell 1, and the other end of the pull rope 5 is connected to a power device 15. When the power device 15 is firmly connected with the pull rope 5, the pull rope 5 is in a tense state, and the rotating rod 3 forms a certain included angle with the horizontal plane under the action of lateral component force of the pull rope 5; referring to fig. 2, when the power device 15 is connected with the pull rope 5 to break or loosen, the pull rope 5 is in a loose state, and the rotating rod 3 rotates towards the horizontal plane under the action of self gravity and/or the reverse pretightening force of the torsion spring 4.

The workflow of the present embodiment:

referring to fig. 1, if the lifting system operates normally, the pull rope 5 will be straightened, and the rotating rod 3 forms a certain included angle with the horizontal plane. The direction of the magnetic induction line of the moving magnet 9 is inconsistent with the direction of the magnetic induction line of the fixed magnet 10, namely, the direction of the magnetic induction line of the moving magnet 9 is inconsistent with the direction of the magnetic pole of the fixed magnet 10, the permanent magnets formed by the two are weak in magnetism, namely, the direction of the magnetic induction line of the moving magnet 9 and the magnetic induction line of the fixed magnet 10 form a closed loop of a magnetic circuit in the permanent magnets, no magnetic induction line comes out of the permanent magnets, so that attraction force is not generated on the steel guide rail 13, and the lifting basket 14 can normally lift.

Referring to fig. 2, if the lifting system falls, the pull rope 5 is in a loose state, and the rotating rod 3 rotates towards the horizontal plane under the action of dead weight and/or the torsion spring 4. The rotation of the rotating rod 3 drives the first rotating shaft 2 and the bevel gear 6 connected to the first rotating shaft 2 to rotate, and drives the moving magnet 9 to rotate after passing through the gear 7. The rotating process is characterized in that the rotating angle of the rotating rod 3, the number of teeth of the bevel gear 6, the number of teeth of the gear 7 and the limit block 16 jointly ensure that when the rotating rod 3 reaches the limit block 16, the direction of a magnetic induction line of the moving magnet 9 rotates to be consistent with that of a magnetic induction line of the fixed magnet 20, namely, the magnetic induction line of the moving magnet 9 is consistent with that of the fixed magnet 10, the permanent magnets formed by the two are ferromagnetic, namely, the magnetic induction line of the fixed magnet 9 comes out of the N pole of the fixed magnet, passes through the upper yoke 11, passes through the steel guide rail 13 and returns to the lower yoke 12 to enter the S pole of the fixed magnet 9, and the moving magnet 10 is similar, so that the permanent magnet can be tightly adsorbed on the steel guide rail 13, even if the permanent magnet is tightly adsorbed on the steel guide rail 13 by the lifting basket 14 fixedly connected with the lifting basket 14, and the lifting basket 14 is prevented from continuously falling.

After the falling accident happens, the system is overhauled to check faults, and when the system needs to run continuously, the lifting system is only required to be normally operated to ascend, at the moment, the pull rope 5 is straightened again under the action of the power device 15, and the rotating rod 3 is driven to move upwards again in the process. At the moment, through linkage transmission of the rotating rod 3, the first rotating shaft 2, the bevel gear 6, the gear 7 and the second rotating shaft 8, the movable magnet 9 rotates to a position with a magnetic pole opposite to that of the fixed magnet 10, and the permanent magnet pair shows weak magnetism.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. Permanent magnet anti-falling device used on steel guide rail, comprising a shell (1), and characterized in that: the device also comprises a first rotating shaft (2), a rotating rod (3), a torsion spring (4), a pull rope (5), a bevel gear (6), a gear (7), a second rotating shaft (8) and a permanent magnet for adsorbing a steel guide rail (13), wherein the first rotating shaft, the rotating rod (3), the torsion spring (4), the pull rope (5), the bevel gear (6), the gear (7) and the second rotating shaft are arranged in the shell (1);

the permanent magnet comprises a fixed magnet (10) fixedly arranged and a movable magnet (9) rotating relative to the fixed magnet (10), a second rotating shaft (8) penetrating through the movable magnet (9) is arranged in the movable magnet (9), one end of the second rotating shaft (8) is connected with the fixed magnet (10), the other end of the second rotating shaft (8) is connected with a gear (7), the gear (7) is arranged on the second rotating shaft (8) and drives the second rotating shaft (8) to rotate, the bevel gear (6) is meshed with the gear (7) and is matched with the gear (7), a first rotating shaft (2) capable of driving the bevel gear (6) to rotate is arranged in the bevel gear (6), two ends of the first rotating shaft (2) are connected with the inner wall of the shell (1), the axes of the first rotating shaft (2) and the second rotating shaft (8) are mutually perpendicular, one end of the rotating rod (3) is connected with the first rotating shaft (2), the other end of the rotating rod (3) penetrates out of the shell (1) and can move up and down relative to the shell (1), the bevel gear (6) is meshed with the gear (7), the first rotating shaft (4) is sleeved on the other end of the rotating rod (4) and is connected with the other end of the torsion spring (4) and is connected with the other end (4) of the rotating rod (4), the pull rope (5) is connected with a rotating rod (3) penetrating out of the shell (1);

an upper yoke (11) is arranged at the top of the fixed magnet (10), a lower yoke (12) is arranged at the bottom of the fixed magnet (10), the upper yoke (11) is connected to the top of the shell (1), the lower yoke (12) is connected to the bottom of the shell (1), and the movable magnet (9) can rotate between the upper yoke (11) and the lower yoke (12);

a limiting block (16) which is used for preventing the rotating rod (3) from exceeding a preset position when rotating is arranged on the inner wall of the shell (1).