CN112279050B - Safety braking traction device with overspeed protection for elevator - Google Patents
Safety braking traction device with overspeed protection for elevator Download PDFInfo
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- CN112279050B CN112279050B CN202011175469.0A CN202011175469A CN112279050B CN 112279050 B CN112279050 B CN 112279050B CN 202011175469 A CN202011175469 A CN 202011175469A CN 112279050 B CN112279050 B CN 112279050B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0065—Roping
- B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
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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
- B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
- B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
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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
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a safety braking traction device with overspeed protection for an elevator, which comprises a motor, a quick-opening wheel, an outer rotor, an inner rotor, a differential transmission assembly, a speed taking assembly and a brake, wherein the outer rotor and the inner rotor are coaxially arranged, one ends of the outer rotor and the inner rotor in the same direction are in transmission connection with the quick-opening wheel, and the differential transmission assembly is arranged between the outer rotor and the inner rotor. The quick starter comprises a revolution frame and revolution gears, the outer rotor comprises a sleeve and a wire coil gear, the inner rotor comprises a middle shaft and a speed taking gear, the sleeve is sleeved on the middle shaft through a bearing rotating sleeve, the wire coil gear taking the middle shaft as an axis is arranged at one end of the sleeve, the speed taking gear taking the middle shaft as an axis is arranged at one end of the middle shaft, the revolution axis of the revolution frame is taken as the middle shaft, one end of the revolution frame is in transmission connection with a motor, one end of the revolution frame, far away from the motor, is radially inwards provided with a revolution gear capable of rotating, the revolution gear, the wire coil gear and the speed taking gear are bevel gears, and the revolution gear is respectively in meshing connection.
Description
Technical Field
The invention relates to the technical field of elevator traction devices, in particular to a safety braking traction device with overspeed protection for an elevator.
Background
The elevator is an essential part in a building in the society nowadays, the flow of people is great, the safe traction of the elevator must be ensured, and although more safety measures can be provided in the elevator to prevent the elevator from falling, the stable traction and overspeed protection of the elevator are still a difficult problem.
In the prior art, a traction wire disc connected with a traction steel rope of an elevator car is basically directly connected with a motor, so that the contradiction between the stable starting of the elevator and the quick starting of the motor is caused, or the motor is started slowly to ensure the stable lifting of the elevator, or the motor is started quickly at high power to cause the shaking of the elevator, when the motor is started slowly, the rotating speed of a motor shaft is slow, the motor cannot reach a rotating speed high-efficiency area quickly, the motor loss is large, the heat of a machine room where a traction device is located is increased, and the burden of a ventilation system is increased.
There is currently no elevator system that can achieve fast operation of the traction motor to a highly efficient working area.
Disclosure of Invention
The object of the present invention is to provide a safety brake traction device with overspeed protection for an elevator, which solves the problems mentioned in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an elevator is with safe braking draw gear who has overspeed protection, including the motor, the wheel that opens soon, the external rotor, the inner rotor, differential transmission subassembly, get fast subassembly and brake ware, external rotor and inner rotor coaxial arrangement, the one end of external rotor and inner rotor equidirectional all is connected with the wheel transmission that opens soon, set up differential transmission subassembly between external rotor and the inner rotor, the wheel that opens soon sets up for rotation of rotation axis with the inner rotor axis, the motor is connected with the wheel rigid drive that opens soon, the brake ware gives the external rotor braking force, the one end that the wheel that opens soon is kept away from to the inner rotor sets up the subassembly that gets fast, the subassembly that gets the inner rotor rotational speed and control brake ware is to the.
The motor is a source of rotation power of the braking traction device, a part of disc-shaped structure is manufactured in the outer rotor to be used as a wire spool of a traction steel rope in the whole elevator structure, the rotation of the outer rotor is the lifting motion of an elevator car, the outer rotor is separated from the rotation power source-the motor, the purposes of quick starting of the motor and stable starting and stopping of the elevator can be achieved, when the motor runs, the driving object of the motor is a quick starting wheel which can be quickly started, when the outer rotor bears a load and the rotating speed is increased from zero, the rotation resistance of the quick starting wheel is smaller than that of the outer rotor, the direct-connected motor can also quickly increase the rotating speed to a high-efficiency working area, the running process of realizing the differential rotating speed starting among the quick starting wheel, the outer rotor and the inner rotor is realized through a group of gears, the rotation resistance of, the differential transmission assembly between the inner rotor and the outer rotor is used as a structure for driving the outer rotor to increase in speed,
the analysis is the corresponding situation when the elevator car rises, when the elevator car descends, the outer rotor has no resistance except the brake, in this situation, as long as the brake is unlocked, the speed of the outer rotor is increased even more than that of the inner rotor, in this situation, the outer rotor needs to reversely drive the inner rotor to increase the speed, the speed-taking component obtains the rotating speed of the inner rotor to control the braking force of the brake on the outer rotor, when the speed of the inner rotor is zero or too high, the braking force needs to be provided, the speed of the inner rotor is zero corresponding to the stop state of the elevator, at this moment, the brake needs to lock the outer rotor to prevent the outer rotor from rotating, with this control purpose, the brake is required to be a failure shutdown principle, when the device is in failure or in sexual shutdown, the brake locks the outer rotor through a self mechanical structure, and the brake is controlled to unlock logic, when the external rotor rotational speed was too fast, corresponding the too fast condition of car acceleration and deceleration, also required the external rotor rotational speed to reduce this moment, the brake provides bigger brake power promptly, summarizes the brake logic of brake from this: the rotating speed of the inner rotor rises from zero, the braking force is reduced firstly and then increased, the rotating speed of the inner rotor corresponding to the moment when the braking force is minimum is the corresponding rotating speed of the lift car at the designed lifting speed, the rotating speeds of the inner rotor and the outer rotor have certain difference, but the rotating speeds of the inner rotor and the outer rotor tend to be the same through the transmission of the differential transmission assembly;
the main operating principle of the device under two conditions of lift of the car is as follows:
when the lift car ascends: the outer rotor can rise only by power input, the power of the motor is input, the fast starting wheel revolves, the rotating speed of the inner rotor rises, the brake gradually releases the braking force, the rotating speed of the outer rotor rises, the traction lift car rises, if the traction speed is too high, namely the input speed of the motor is too high, the rotating speeds of the inner rotor and the outer rotor are both larger, the speed taking component recognizes that the rotating speed of the inner rotor is too high, the brake is controlled to provide larger braking force, the rotating speed of the rotor is prevented from being further improved, and the purpose of overspeed protection is achieved;
when the lift car descends initially, the brake increases the locking force of the outer rotor, the motor is started, the inner rotor is accelerated in advance, the speed taking component obtains a signal to slightly loosen the brake, the outer rotor is subjected to different-speed transmission of the inner rotor and pull of the lift car to increase the speed, similarly, when the speed is increased to be larger, the speed of the inner rotor is also increased along with the speed of the outer rotor, and the speed taking component starts to control the brake to give gradually-increased brake force to prevent the rotating speed of the rotor from increasing;
in the following analysis, the operation is described in the process of car ascending, and the corresponding car descending is not described again.
Furthermore, the quick starter comprises a revolution frame and revolution gears, the outer rotor comprises a sleeve, a wire coil gear and a traction wire coil, the inner rotor comprises a middle shaft and a speed taking gear, the sleeve is sleeved on the middle shaft through a bearing rotating sleeve, the wire coil gear taking the middle shaft as an axis is arranged at one end of the sleeve, the traction wire coil is further radially arranged on the outer surface of the sleeve, the speed taking gear taking the middle shaft as the axis is arranged at one end of the middle shaft, the revolution axis of the revolution frame is taken as the middle shaft, one end of the revolution frame is in transmission connection with the motor, the revolution gear capable of rotating is radially inwards arranged at one end of the revolution frame far away from the motor, the revolution gear, the wire coil gear and the speed taking gear are bevel gears, and the revolution gear is. The structure realizes the quick starting process of the motor rotating shaft, when the motor is started, the revolution frame is driven to revolve, the middle shaft has small rotation resistance, the traction wire disc externally connected with the sleeve is a wire disc wound by a traction rope in an elevator system and has large rotation resistance, the revolution frame is quickly started to revolve, the revolution gear also rotates, the rotating speed of the speed taking gear also quickly rises to drive the middle shaft to quickly rise, in the subsequent time, because the sleeve and the middle shaft have a rotating speed difference, the differential transmission assembly between the sleeve and the middle shaft can enable the rotating speeds of the sleeve and the middle shaft to tend to be consistent, therefore, the rotating speed of the sleeve slowly rises, the traction wire disc carries out steel rope traction operation, in the process that the speed of the sleeve rises and the speed of the revolution shaft tends to be synchronous, the speed of an inner rotor of the revolution frame is kept unchanged along with the motor, but the rotating speed of the revolution gear gradually decreases, and the purposes that the brake is quickly lifted and the.
Furthermore, the differential transmission assembly comprises an outer rotor speed escaping assembly and an inner rotor speed escaping assembly, the outer rotor speed escaping assembly comprises an outer inclined plane disc, an outer rolling ball and an outer sliding block, the inner rotor speed escaping assembly comprises an inner inclined plane disc, an inner rolling ball and an inner sliding block, the outer rotor also comprises a speed distribution cavity formed by bending a sleeve, the inner surface of the speed distribution cavity is radially inwards extended and provided with the outer inclined plane disc, the conical tip of the outer inclined plane disc deviates from the inner rotor speed escaping assembly, one surface of the outer inclined plane disc facing the inner rotor speed escaping assembly is provided with the outer rolling ball capable of radially sliding, the outer sliding block is axially arranged along the inner surface of the speed distribution cavity, the outer sliding block and the inner surface of the speed distribution cavity are in transmission through a key, one side end face of the outer,
the inner inclined plane disc is arranged on the middle shaft, the conical tip of the conical surface of the inner inclined plane disc deviates from the outer rotor speed escaping assembly, one surface of the inner inclined plane disc, facing the outer rotor speed escaping assembly, is provided with an inner rolling ball capable of sliding radially, the inner sliding block is arranged in a sliding mode along the axial direction of the middle shaft, the inner sliding block and the middle shaft are in transmission through a key, one end face of one side of the inner sliding block is tightly attached to the inner rolling ball, and the other end face of the inner sliding.
This structure realizes the different speed transmission purpose, when the well axle speed is greater than joining in marriage fast chamber rotational speed and rotational speed great, interior ball receives centrifugal force and goes on moving outward, because the existence of interior bevel disk, interior ball can push the interior slider of axial thrust makes it towards the laminating of outside slider, through friction transmission, impel and join in marriage fast chamber rotational speed and promote, the same, when the external rotor rotational speed is great, also can push the outer slider through the outer ball axial thrust that removes, make interior slider and the laminating of outer slider friction surface fully transmit, as long as there is the rotational speed difference in interior outer rotor, friction transmission just exists always, impel both rotational speeds to tend to the same.
The safety braking traction device further comprises a heterodromous locking structure, the heterodromous locking structure is arranged between the outer rotor and the inner rotor, and the heterodromous locking structure prevents the outer rotor and the inner rotor from rotating in a heterodromous manner. The heterodromous locking structure ensures that the inner rotor and the outer rotor can only rotate in the same direction, at most, only one of the inner rotor and the outer rotor can stop and rotate the other one of the inner rotor and the outer rotor, and the heterodromous locking component is used for ensuring that the rotating speed of the inner rotor and the outer rotor can fall and return to zero when the motor stops.
Furthermore, the different-direction locking structure comprises a different-direction locking pin plate, the outer rotor further comprises a first wheel body, the inner rotor further comprises a second wheel body, the first wheel body is arranged at one end of the sleeve, a plurality of first convex teeth uniformly distributed on the circumference are radially arranged outwards of the first wheel body, the second wheel body is arranged on the middle shaft, a plurality of second convex teeth uniformly distributed on the circumference are radially arranged outwards of the second wheel body, the diameters of tooth tops of the first convex teeth and the second convex teeth are the same, the different-direction locking pin plate is arranged on one side of the first wheel body and the second wheel body in the radial direction, the different-direction locking pin plate covers the first wheel body and the second wheel body in the axial direction of the middle shaft, the different-direction locking pin plate is arranged around a rotating shaft parallel to the middle shaft, a torsion spring is arranged between the different-direction locking pin plate and the rotating shaft thereof, the original elastic position of the different-direction locking pin plate radially penetrates through the axial line, and the length of the different-direction locking pin plate and the tooth top radius of the first convex teeth are larger than. When the outer rotor rotates clockwise, the different-direction lock pin plate is shifted to deflect towards one side, the expected falling position falls back to the vertical position, if the second wheel body on the inner rotor also rotates clockwise, the rotation is smooth, if the second wheel body rotates reversely, the second wheel body can be clamped by the different-direction lock pin plate deflected towards the right, the inner rotor and the outer rotor can also rotate anticlockwise in the same direction, and when the outer rotor rotates anticlockwise, the different-direction lock pin plate is pushed to deflect towards the left.
Furthermore, the speed taking assembly comprises a speed taking inclined plane disc, a speed taking rolling ball, a speed taking sliding block, a spring and an electromagnetic valve, the brake comprises a brake pad and an air inlet pipe, the brake pad receives air inlet control of the air inlet pipe and gives braking force to the surface of the traction line disc, the electromagnetic valve is arranged on the air inlet pipe, the speed taking inclined plane disc is radially arranged on the central shaft, the speed taking rolling ball capable of sliding radially is arranged on the conical surface of the speed taking inclined plane disc, the speed taking sliding block is sleeved on the central shaft through a linear bearing, one side end face of the speed taking sliding block abuts against the speed taking rolling ball, axial linear movement of the speed taking sliding block controls the opening degree of the electromagnetic valve, one end of the spring abuts against one base, and one end of the spring pushes the speed taking sliding. The speed-taking sliding block corresponds to two axial positions when the rotating speed of the middle shaft is zero and the rotating speed reaches the maximum rotating speed, the two axial positions are respectively used as control nodes of the electromagnetic valve, however, in the process from one position to the other position, the opening degree of the electromagnetic valve should be increased and then decreased, so that more gas is introduced into the brake pad to be smaller, and the braking force is maximum when the gas is not introduced.
Furthermore, the speed taking assembly further comprises a sliding needle and a sliding resistor, the sliding needle is connected with the speed taking sliding block, the needle point of the sliding needle is in contact with the surface of the sliding resistor to form a resistor, and one end of the sliding needle and one end of the sliding resistor are connected with the electromagnetic valve. The resistance value of the sliding resistor is used as the opening degree control of the electromagnetic valve, and the electric signal conversion is accurate.
Compared with the prior art, the invention has the following beneficial effects: the invention realizes that the power motor rapidly enters a high-efficiency working area through the structure of the inner rotor and the outer rotor, the inner rotor is used as a component for preferential start in the early stage of the start of the elevator and can be used as a start mark of a brake, and the inner rotor is used as a speed replacement measuring component of the outer rotor because the speed of the inner rotor is synchronous with the speed of the outer rotor in the later stage, when the rotating speed of the outer rotor is overlarge, a signal is given to the electromagnetic valve to drive the brake block to give more braking force to prevent the rotating speed of the outer rotor from being increased, and the arrangement of the different-direction locking component ensures that.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the installation structure of the invention in an elevator system;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic structural view of the quick release wheel of the present invention and associated components connected thereto;
FIG. 4 is a schematic structural view of an outer rotor of the present invention;
FIG. 5 is a schematic view of the construction of the inner rotor of the present invention;
FIG. 6 is a partial schematic view A of FIG. 2;
FIG. 7 is a schematic structural view of the anisotropic dowel plate and associated components connected thereto according to the present invention;
FIG. 8 is view B-B of FIG. 7;
FIG. 9 is a schematic structural view of the speed pickup assembly and associated components connected thereto in accordance with the present invention.
In the figure: 1-motor, 2-quick starting wheel, 21-revolution frame, 22-revolution gear, 3-outer rotor, 31-sleeve, 32-wire coil gear, 33-traction wire disc, 34-speed matching cavity, 35-first wheel body, 351-first convex tooth, 4-inner rotor, 41-middle shaft, 42-speed taking gear, 43-second wheel body, 431-second convex tooth, 5-differential transmission component, 51-outer rotor speed escape component, 511-outer inclined plane disc, 512-outer rolling ball, 513-outer sliding block, 5131-friction transmission surface, 52-inner rotor, 521-inner inclined plane disc, 522-inner rolling ball, 523-inner sliding block, 6-anisotropic lock pin plate, 7-speed taking component, 71-speed taking inclined plane disc, 72-speed taking inclined plane disc, 73-speed taking slide block, 74-spring, 75-sliding needle, 76-sliding resistance, 77-electromagnetic valve, 8-brake, 81-brake block, 82-air inlet pipe, 91-coupler, 92-rolling bearing, 93-key, 94-linear bearing and 99-foundation.
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. 1-9, the present invention provides the following technical solutions:
a safety braking traction device with overspeed protection for an elevator comprises a motor 1, a quick-opening wheel 2, an outer rotor 3, an inner rotor 4, a differential transmission assembly 5, a speed taking assembly 7 and a brake 8, wherein the outer rotor 3 and the inner rotor 4 are coaxially arranged, one ends of the outer rotor 3 and the inner rotor 4 in the same direction are in transmission connection with the quick-opening wheel 2, the differential transmission assembly 5 is arranged between the outer rotor 3 and the inner rotor 4, the axis of the inner rotor 4 in the quick-opening wheel 2 is arranged in a rotating mode as a rotating shaft, the motor 1 is in rigid transmission connection with the quick-opening wheel 2, a coupler 91 in a diagram 3 is in a transmission connection mode, the brake 8 gives braking force to the outer rotor 3, the speed taking assembly 7 is arranged at one end, far away from the quick-opening wheel 2, of the inner rotor 4, and the speed taking assembly 7 obtains the rotating speed of the.
The motor 1 is a source of rotation power of a braking traction device, a part of disc-shaped structure is manufactured in the outer rotor 3 to be used as a wire spool of a traction steel rope in the whole elevator structure, the outer rotor 3 rotates to be the lifting motion of an elevator car, the outer rotor 3 is separated from a rotation power source-the motor 1, the purposes of quick motor starting and stable elevator starting and stopping can be achieved, when the elevator is in operation, a driving object of the motor 1 is a quick starting wheel 2, the quick starting wheel 2 can be quickly started, when the outer rotor 3 bears a load and starts to lift the rotating speed from zero, the rotating resistance of the quick starting wheel 2 is smaller than that of the outer rotor 3, the directly connected motor 1 can also quickly lift the rotating speed to a high-efficiency working area, the operation process of realizing the differential rotating speed starting among the quick starting wheel 2, the outer rotor 3 and the inner rotor 4 is realized through a group, the inner rotor 4 also reaches the rated speed quickly, the differential transmission assembly 5 between the inner rotor 4 and the outer rotor 3 is used as a structure for driving the outer rotor 3 to rise in speed,
the above analysis is the corresponding situation when the elevator car is rising, when the elevator car is falling, the outer rotor 3 has no resistance except the brake 8, in this case, as long as the brake 8 is unlocked, the speed of the outer rotor 3 is increased even more than the inner rotor 4, in this case, the outer rotor 3 needs to reversely drive the inner rotor 4 to increase the speed, the speed-taking component 7 obtains the rotating speed of the inner rotor 4 to control the braking force of the brake 8 to the outer rotor 3, when the speed of the inner rotor 4 is zero or the speed is too high, the braking force needs to be provided, the speed of the inner rotor 4 is zero, which corresponds to the elevator stop state, at this time, the brake 8 needs to lock the outer rotor 3 to make it not rotate, so as to control, the brake 8 is required to be the shutdown principle, and when the device is in failure or in purposefully shutdown, the brake 8 locks the outer rotor 3 through the self mechanical structure, brake 8 is controlled and unties the logic, when external rotor 3 rotational speed was too fast, corresponding car speed of rise and fall too fast the condition, also required external rotor 3 rotational speed to reduce this moment, and brake 8 provides bigger brake power promptly, summarizes brake 8's braking logic from this: the process that the rotating speed of the inner rotor 4 rises from zero, the braking force is firstly reduced and then increased, the rotating speed of the inner rotor 4 corresponding to the moment when the braking force is minimum is the corresponding rotating speed of the lift car at the designed lifting speed, the rotating speeds of the inner rotor 4 and the outer rotor 3 have certain difference, but tend to be the same through the transmission of the differential transmission assembly 5;
the main operating principle of the device under two conditions of lift of the car is as follows:
when the lift car ascends: the outer rotor 3 can rise only by power input, the motor 1 inputs power, the fast starting wheel 2 revolves, the rotating speed of the inner rotor 4 rises, the brake 8 gradually releases brake force, the rotating speed of the outer rotor 3 rises, the traction lift car rises, if the traction speed is too high, namely the input speed of the motor 1 is too high, the rotating speeds of the inner rotor and the outer rotor are both larger, the speed taking component 7 recognizes that the rotating speed of the inner rotor 4 is too high, the brake 8 is controlled to provide larger brake force, the rotating speed of the rotor is prevented from being further increased, and the purpose of overspeed protection is achieved;
when the lift car descends initially, the brake 8 improves the locking force of the outer rotor 3, the motor 1 is started, the inner rotor 4 is accelerated in advance, the speed taking component 7 obtains a signal to slightly loosen the brake 8, the outer rotor 3 is subjected to different-speed transmission of the inner rotor 4 and lift car dragging to increase the speed, similarly, when the speed is increased to be larger, the speed of the inner rotor 4 is also increased along with the speed of the outer rotor 3, and the speed taking component 7 starts to control the brake 8 to give gradually-increased brake force to prevent the rotating speed of the rotor from being increased;
in the following analysis, the operation is described in the process of car ascending, and the corresponding car descending is not described again.
The quick starter 2 comprises a revolution frame 21 and a revolution gear 22, the outer rotor 3 comprises a sleeve 31, a wire coil gear 32 and a traction wire coil 33, the inner rotor 4 comprises a middle shaft 41 and a speed taking gear 42, the sleeve 31 is rotatably sleeved on the middle shaft 41 through a bearing 92, the wire coil gear 32 taking the middle shaft 41 as an axis is arranged at one end of the sleeve 31, the traction wire coil 33 is further radially arranged on the outer surface of the sleeve 31, the speed taking gear 42 taking the middle shaft 41 as an axis is arranged at one end of the middle shaft 41, the revolution axis of the revolution frame 21 is taken as the middle shaft 41, one end of the revolution frame 21 is in transmission connection with the motor 1, the revolution gear 22 capable of being radially arranged inwards at one end of the revolution frame 21 far away from the motor 1, the revolution gear 22, the wire coil gear 32 and the rotation gear 42 are all bevel gears, and the revolution gear 22 is in meshing connection. The structure realizes the quick starting process of the rotating shaft of the motor 1, as shown in figure 3, when the motor 1 is started, the revolution frame 21 is driven to revolve, the central shaft 41 has smaller rotating resistance, the traction wire disc 33 externally connected with the sleeve 31 is a wire disc wound by a traction rope in an elevator system and has larger rotating resistance, when the revolution frame 21 is quickly started to revolve, the revolution gear 22 also rotates, the rotating speed of the speed taking gear 42 also rises quickly, the speed of the central shaft 41 is driven to rise quickly, in the subsequent time, because the sleeve 31 and the central shaft 41 have a rotating speed difference, the differential transmission assembly 5 between the sleeve 31 and the central shaft 41 can cause the rotating speeds of the sleeve 31 and the central shaft 41 to tend to be consistent, therefore, the rotating speed of the sleeve 31 rises slowly, the traction wire disc 33 carries out steel rope traction operation, in the process that the speed of the sleeve 31 rises and tends to be synchronous with the central shaft 41, the revolving speed of, however, the rotation speed of the revolution gear 22 is gradually reduced, and the purpose of rapidly lifting and releasing the brake 8 at the speed of the inner rotor 4 and rapidly reaching the high-efficiency working area by the motor 1 is achieved in sequence.
The differential transmission assembly 5 comprises an outer rotor speed escaping assembly 51 and an inner rotor speed escaping assembly 52, the outer rotor speed escaping assembly 51 comprises an outer inclined disc 511, an outer rolling ball 512 and an outer sliding block 513, the inner rotor speed escaping assembly 52 comprises an inner inclined disc 521, an inner rolling ball 522 and an inner sliding block 523, the outer rotor 3 further comprises a speed distribution cavity 34 formed by bending a sleeve 31, the inner surface of the speed distribution cavity 34 is radially and inwardly provided with the outer inclined disc 511, the conical tip of the conical surface of the outer inclined disc 511 deviates from the inner rotor speed escaping assembly 52, one surface of the outer inclined disc 511 facing the inner rotor speed escaping assembly 52 is provided with the outer rolling ball 512 capable of radially sliding, the outer sliding block 513 is axially and slidably arranged along the inner surface of the speed distribution cavity 34, the outer sliding block 513 is in transmission with the inner surface of the speed distribution cavity 34 through a key 93, one side end surface of the outer sliding block 513 is tightly attached to,
the inner inclined plane disc 521 is arranged on the central shaft 41, the conical tip of the conical surface of the inner inclined plane disc 521 deviates from the outer rotor speed escaping assembly 51, one surface of the inner inclined plane disc 521 facing the outer rotor speed escaping assembly 51 is provided with an inner rolling ball 522 capable of sliding radially, the inner sliding block 523 is arranged along the axial direction of the central shaft 41 in a sliding mode, the inner sliding block 523 and the central shaft 41 are in transmission through a key 93, one side end face of the inner sliding block 523 is tightly attached to the inner rolling ball 522, and the other side end face of the inner sliding block 523 serves as a friction.
This structure realizes the purpose of different speed transmission, when the middle shaft 41 rotational speed is greater than the chamber 34 rotational speed of joining in marriage a speed and the rotational speed is great, interior ball 522 receives centrifugal force and carries out and outwards removes, because the existence of interior bevel disk 521, interior ball 522 can axial push interior slider 523 make its laminating towards outside slider 513, through friction transmission, impel join in marriage a speed chamber 34 rotational speed and promote, it is the same, when 3 rotational speeds of external rotor are great, also can push outer slider 513 through the outer ball 512 axial that removes, make interior slider 523 and the laminating of outer slider 513 friction surface fully carry out the transmission, as long as there is the rotational speed difference in interior and exterior rotor, friction transmission just exists always, impel both rotational speeds to tend to the same.
The safety braking traction device further comprises a heterodromous locking structure, the heterodromous locking structure is arranged between the outer rotor 3 and the inner rotor 4, and the heterodromous locking structure prevents the outer rotor 3 and the inner rotor 4 from rotating in a heterodromous manner. The counter-rotating locking structure ensures that the inner rotor and the outer rotor can only rotate in the same direction, at most, only one of the inner rotor and the outer rotor can stop and rotate the other one of the inner rotor and the outer rotor, and the counter-rotating locking component is used for ensuring that the rotating speed of the inner rotor and the outer rotor can drop and return to zero when the motor stops, and referring to the above quick starting principle of the revolution gear 22, the wire coil gear 32 and the speed taking gear 42, if the counter-rotating locking structure does not exist, after the motor 1 stops and the revolution speed of the revolution frame 21 returns to zero, if the inner rotor 4 rapidly passes through a rotating speed zero state in the return-to-zero process and rotates in the opposite direction, the outer rotor 3 can continuously maintain the rotating speed, so that the danger that.
The different-direction locking structure comprises a different-direction locking pin plate 6, the outer rotor 3 further comprises a first wheel body 35, the inner rotor 4 further comprises a second wheel body 43, the first wheel body 35 is arranged at one end of the sleeve 31, the first wheel body 35 is radially outwards provided with a plurality of first convex teeth 351 uniformly distributed in the circumference, the second wheel body 43 is arranged on the middle shaft 41, the second wheel body 43 is radially outwards provided with a plurality of second convex teeth 431 uniformly distributed in the circumference, the diameters of addendum circles of the first convex teeth 351 and the second convex teeth 431 are the same, the different-direction locking pin plate 6 is arranged at one side of the first wheel body 35 and the second wheel body 43 in the radial direction, the different-direction locking pin plate 6 covers the first wheel body 35 and the second wheel body 43 in the axial direction of the middle shaft 41, the different-direction locking pin plate 6 is arranged around a rotating shaft parallel to the middle shaft 41, a torsion spring is arranged between the different-direction locking pin plate 6 and the rotating shaft, the original elastic position of the different-direction locking pin plate, the length of the different-direction lock pin plate 6 and the tooth top radius of the first convex teeth 351 are greater than the center distance between the rotating shaft of the different-direction lock pin plate 6 and the middle shaft 41. As shown in fig. 7 and 8, when the outer rotor 3 rotates clockwise, the different-direction locking pin plate 6 is pushed to deflect to one side, and its expected falling position is fallen to the vertical position, while if the second wheel body 43 on the inner rotor 4 also rotates clockwise, the rotation is smooth, if the rotation is reversed, the different-direction locking pin plate 6 deflected to the right is blocked, the inner and outer rotors can also rotate counterclockwise in the same direction, and when the rotation is counterclockwise, the different-direction locking pin plate 6 is pushed to deflect to the left.
The speed taking assembly 7 comprises a speed taking inclined disc 71, a speed taking rolling ball 72, a speed taking sliding block 73, a spring 74 and an electromagnetic valve 77, the brake 8 comprises a brake pad 81 and an air inlet pipe 82, the brake pad 81 receives air inlet control of the air inlet pipe 82 and gives braking force to the surface of the traction wire disc 33, the electromagnetic valve 77 is arranged on the air inlet pipe 82, the speed taking inclined disc 71 is radially arranged on the middle shaft 41, the speed taking rolling ball 72 capable of radially sliding is arranged on the conical surface of the speed taking inclined disc 71, the speed taking sliding block 73 is sleeved on the middle shaft 41 through a linear bearing 94, one side end face of the speed taking sliding block 73 is tightly abutted with the speed taking rolling ball 72, axial linear movement of the speed taking sliding block 73 controls the opening of the electromagnetic valve 77, one end of the spring 74 is abutted to a base 99, and the other end pushes the speed taking sliding. The speed-taking sliding block 73 corresponds to two axial positions when the rotating speed of the middle shaft 41 is zero and the rotating speed reaches the maximum rotating speed, the two axial positions are respectively used as control nodes of the electromagnetic valve 77, however, in the process from one position to the other position, the opening degree of the electromagnetic valve 77 should be increased and then decreased, so that most of gas introduced into the brake pad 81 has smaller braking force, and the braking force is maximum when the gas is not introduced.
The speed taking assembly 7 further comprises a sliding needle 75 and a sliding resistor 76, the sliding needle 75 is connected with the speed taking sliding block 73, the needle tip of the sliding needle 75 is in surface contact with the sliding resistor 76 to form a resistor, and one end of the sliding needle 75 and one end of the sliding resistor 76 are connected with the electromagnetic valve 77. The resistance value of the sliding resistor is used as the opening degree control of the electromagnetic valve 77, and the electric signal conversion is accurate.
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.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an elevator is with safe braking draw gear who has overspeed protection which characterized in that: the safety braking traction device comprises a motor (1), a quick-opening wheel (2), an outer rotor (3), an inner rotor (4), a differential transmission assembly (5), a speed taking assembly (7) and a brake (8), the outer rotor (3) and the inner rotor (4) are coaxially arranged, one ends of the outer rotor (3) and the inner rotor (4) in the same direction are in transmission connection with the quick-opening wheel (2), a differential transmission assembly (5) is arranged between the outer rotor (3) and the inner rotor (4), the quick-opening wheel (2) is rotationally arranged by taking the axis of the inner rotor (4) as a rotating shaft, the motor (1) is in rigid transmission connection with the quick opening wheel (2), the brake (8) applies braking force to the outer rotor (3), a speed taking component (7) is arranged at one end of the inner rotor (4) far away from the quick starting wheel (2), the speed taking component (7) acquires the rotating speed of the inner rotor (4) and controls the braking force of the brake (8) on the outer rotor (3).
2. The safety brake traction device with overspeed protection for elevator according to claim 1, characterized in that: the quick starting wheel (2) comprises a revolution frame (21) and a revolution gear (22), the outer rotor (3) comprises a sleeve (31), a wire coil gear (32) and a traction wire coil (33), the inner rotor (4) comprises a middle shaft (41) and a speed taking gear (42), the sleeve (31) is rotatably sleeved on the middle shaft (41) through a bearing (92), one end of the sleeve (31) is provided with the wire coil gear (32) taking the middle shaft (41) as an axis, the outer surface of the sleeve (31) is also radially provided with the traction wire coil (33), one end of the middle shaft (41) is provided with the speed taking gear (42) taking the middle shaft (41) as an axis, the revolution axis of the revolution frame (21) is the middle shaft (41), one end of the revolution frame (21) is in transmission connection with the motor (1), one end of the revolution frame (21) far away from the motor (1) is radially inwards provided with the revolution gear (22) capable of, the revolution gear (22), the wire coil gear (32) and the speed taking gear (42) are all bevel gears, and the revolution gear (22) is respectively meshed and connected with the wire coil gear (32) and the speed taking gear (42) towards two sides.
3. The safety brake traction device with overspeed protection for elevator according to claim 2, characterized in that: the differential transmission assembly (5) comprises an outer rotor speed escaping assembly (51) and an inner rotor speed escaping assembly (52), the outer rotor speed escaping assembly (51) comprises an outer inclined disc (511), an outer rolling ball (512) and an outer sliding block (513), the inner rotor speed escaping assembly (52) comprises an inner inclined disc (521), an inner rolling ball (522) and an inner sliding block (523), the outer rotor (3) further comprises a speed distribution cavity (34) formed by bending a sleeve (31), the inner surface of the speed distribution cavity (34) is radially and inwardly provided with the outer inclined disc (511), the conical tip of the outer inclined disc (511) deviates from the inner rotor speed escaping assembly (52), one surface of the outer inclined disc (511) facing the inner rotor speed escaping assembly (52) is provided with an outer rolling ball (512) capable of radially sliding, the outer sliding block (513) is axially arranged along the inner surface of the speed distribution cavity (34) in a sliding mode, and the outer sliding block (513) and the inner surface of the speed distribution cavity (34) are in a transmission mode through a key (93, one end surface of the outer sliding block (513) is tightly attached to the outer rolling ball (512), the other side of the outer sliding block (513) is provided with a friction transmission surface (5131),
the inner inclined plane disc (521) is arranged on the middle shaft (41), the conical tip of the conical surface of the inner inclined plane disc (521) deviates from the outer rotor speed escaping assembly (51), the inner inclined plane disc (521) is provided with an inner rolling ball (522) capable of sliding radially towards one surface of the outer rotor speed escaping assembly (51), the inner sliding block (523) is arranged in a sliding mode along the axial direction of the middle shaft (41), the inner sliding block (523) is in transmission with the middle shaft (41) through a key (93), and one side end face of the inner sliding block (523) is tightly attached to the inner rolling ball (522), and the other side end face of the inner sliding block (523) is used as a friction face and faces a friction.
4. The safety brake traction device with overspeed protection for elevator according to claim 2, characterized in that: the safety braking traction device further comprises a heterodromous locking structure, the heterodromous locking structure is arranged between the outer rotor (3) and the inner rotor (4), and the heterodromous locking structure prevents the outer rotor (3) and the inner rotor (4) from rotating in a heterodromous manner.
5. The safety brake traction device with overspeed protection for elevator according to claim 4, characterized in that: the different-direction locking structure comprises a different-direction locking pin plate (6), the outer rotor (3) further comprises a first wheel body (35), the inner rotor (4) further comprises a second wheel body (43), the first wheel body (35) is arranged at one end of the sleeve (31), a plurality of first convex teeth (351) uniformly distributed on the circumference are radially outwards arranged on the first wheel body (35), the second wheel body (43) is arranged on the middle shaft (41), a plurality of second convex teeth (431) uniformly distributed on the circumference are radially outwards arranged on the second wheel body (43), the diameters of addendum circles of the first convex teeth (351) and the second convex teeth (431) are the same, the different-direction locking pin plate (6) is arranged on one side of the first wheel body (35) and the second wheel body (43) in the radial direction, the different-direction locking pin plate (6) covers the first wheel body (35) and the second wheel body (43) in the axial direction of the middle shaft (41), and the different-direction locking pin plate (6) is arranged around a rotating shaft parallel to the middle shaft (41), a torsion spring is arranged between the different-direction lock pin plate (6) and the rotating shaft of the different-direction lock pin plate, the elastic original position of the different-direction lock pin plate (6) radially penetrates through the axis of the middle shaft (41), and the length of the different-direction lock pin plate (6) plus the tooth top radius of the first convex teeth (351) is larger than the center distance between the rotating shaft of the different-direction lock pin plate (6) and the middle shaft (41).
6. The safety brake traction device with overspeed protection for elevator according to claim 2, characterized in that: the speed taking assembly (7) comprises a speed taking inclined plane disc (71), a speed taking rolling ball (72), a speed taking sliding block (73), a spring (74) and an electromagnetic valve (77), the brake (8) comprises a brake pad (81) and an air inlet pipe (82), the brake pad (81) receives air inlet control of the air inlet pipe (82) and gives braking force on the surface of the traction wire disc (33), the air inlet pipe (82) is provided with the electromagnetic valve (77), the speed taking inclined plane disc (71) is radially arranged on the middle shaft (41), the speed taking rolling ball (72) capable of sliding radially is arranged on the conical surface of the speed taking inclined plane disc (71), the speed taking sliding block (73) is sleeved on the middle shaft (41) through a linear bearing (94), one side end surface of the speed taking sliding block (73) is tightly abutted against the speed taking rolling ball (72), the opening degree of the axial linear movement control electromagnetic valve (77) of the speed taking sliding block (73) is controlled, one end of the spring (74) is abutted against a foundation, one end pushes the speed-taking slider (73) to the speed-taking bevel disk (71).
7. The safety brake traction device with overspeed protection for elevator according to claim 6, characterized in that: the speed taking assembly (7) further comprises a sliding needle (75) and a sliding resistor (76), the sliding needle (75) is connected with the speed taking sliding block (73), the needle point of the sliding needle (75) is in surface contact with the sliding resistor (76) to form a resistor, and one ends of the sliding needle (75) and the sliding resistor (76) are connected with the electromagnetic valve (77).
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| CN202011175469.0A CN112279050B (en) | 2020-10-28 | 2020-10-28 | Safety braking traction device with overspeed protection for elevator |
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| CN202011175469.0A CN112279050B (en) | 2020-10-28 | 2020-10-28 | Safety braking traction device with overspeed protection for elevator |
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| CN113098192B (en) * | 2021-04-02 | 2022-02-18 | 常州市江南三翔电机有限公司 | Permanent magnet brushless direct current motor with accurate rotating speed regulation control |
| CN113889974B (en) * | 2021-09-24 | 2022-06-28 | 华南农业大学 | Protection device based on mechanical centrifugal switch and relay and control method |
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