CN110745727B - Electric hoist and wind driven generator - Google Patents
Electric hoist and wind driven generator Download PDFInfo
- Publication number
- CN110745727B CN110745727B CN201911029649.5A CN201911029649A CN110745727B CN 110745727 B CN110745727 B CN 110745727B CN 201911029649 A CN201911029649 A CN 201911029649A CN 110745727 B CN110745727 B CN 110745727B
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- China
- Prior art keywords
- friction
- assembly
- main shaft
- centrifugal
- armature
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B1/00—Devices for lowering persons from buildings or the like
- A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
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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
- B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
- B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
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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
Abstract
The invention relates to the field of hoisting machinery, in particular to an electric hoist and a wind driven generator; the electric hoist comprises a shell, a main shaft, a friction assembly and a centrifugal assembly, wherein the main shaft is arranged on the shell and can rotate relative to the shell; when the rotating speed of the main shaft exceeds a preset speed, the centrifugal assembly can extend out of the friction assembly under the action of centrifugal force and is in friction abutment with the inner wall of the shell so as to limit the rotating speed of the main shaft; when the rotating speed of the main shaft does not exceed the preset speed, the centrifugal assembly does not contact the inner wall of the shell, and the main shaft rotates at the speed not higher than the preset speed; the electric hoist can be used for high-altitude escape.
Description
Technical Field
The invention relates to the field of hoisting machinery, in particular to an electric hoist and a wind driven generator.
Background
Wind generating sets of related art are usually equipped with corresponding electric hoists so as to facilitate hoisting of heavy objects and the like; however, the electric hoist provided by the related art is difficult to be applied to high-altitude escape by workers working at high altitude.
Disclosure of Invention
Objects of the present invention include, for example, providing an electric block and a wind power generator that can be used for high-altitude escape.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides an electric hoist, including a housing, a spindle, a friction component, and a centrifugal component, where the spindle is mounted in the housing and can rotate relative to the housing, the spindle is fixedly connected to the friction component, and the centrifugal component is disposed in the friction component; when the rotating speed of the main shaft exceeds a preset speed, the centrifugal assembly can extend out of the friction assembly under the action of centrifugal force and is in friction abutment with the inner wall of the shell so as to limit the rotating speed of the main shaft; when the rotating speed of the main shaft does not exceed the preset speed, the centrifugal assembly does not contact with the inner wall of the shell, and the main shaft rotates at the speed not higher than the preset speed.
In an alternative embodiment, the friction assembly further comprises a first friction member and a second friction member which are connected with each other, the first friction member and the second friction member are distributed along the axial direction of the shell, and the main shaft is connected with the first friction member; a mounting gap is formed between the first friction piece and the second friction piece, and the centrifugal assembly is arranged in the mounting gap.
In an alternative embodiment, the first friction member comprises a friction disc, the friction disc is connected with the main shaft, one end of the main shaft extends out of the shell, the other end of the main shaft is connected with the second friction member, a mounting gap is arranged between the friction disc and the second friction member, one end of the centrifugal assembly is fixedly connected with the main shaft, and the other end of the centrifugal assembly is separated from or in friction fit with the inner wall of the shell.
In an alternative embodiment, the centrifugal assembly comprises a centrifugal block and a first elastic piece, one end of the first elastic piece is fixedly connected with the main shaft, the other end of the first elastic piece is connected with the centrifugal block, and the centrifugal block is separated from or in friction fit with the inner wall of the shell; the first elastic piece is configured to enable the centrifugal block to always have a tendency to be separated from the inner wall of the shell.
In an alternative embodiment, the first friction member further comprises at least two friction blocks, each friction block is connected to the friction disc, and the end of the friction block remote from the friction disc is connected to the second friction member, and two adjacent friction blocks have a sliding gap therebetween, and the centrifugal assembly is located in the sliding gap.
In an alternative embodiment, the friction discs are discs, the axis of the main shaft overlapping the axis of the friction discs, the friction assembly comprising a plurality of centrifugal assemblies distributed around the circumference of the main shaft.
In an alternative embodiment, the electric block further comprises a brake assembly disposed on the housing, the brake assembly being configured to cooperate with the friction assembly to brake or release the spindle.
In an alternative embodiment, the brake assembly includes an armature, a second resilient member, and an electromagnet; the armature is positioned between the friction component and the electromagnet and is abutted against or separated from the friction component; the electromagnet and the armature are magnetically attracted or separated; a second elastic member is arranged between the armature and the electromagnet, and the second elastic member is configured to enable the armature to always have the tendency of abutting with the friction assembly; when the electromagnet is powered off, the second elastic piece can push the armature to abut against the friction assembly; when the electromagnet is electrified, the electromagnet can magnetically attract the armature to overcome the elastic force of the second elastic piece.
In an alternative embodiment, the brake assembly further comprises an eccentric rotatably connected to the armature; the eccentric wheel has a locking position; when the eccentric wheel is located at the locking position and the electromagnet is powered off, the armature is driven by the eccentric wheel to be separated from the friction assembly.
In an alternative embodiment, the armature comprises a body part and a connecting part which are mutually connected, the electromagnet is provided with a through hole, the connecting part is slidably inserted into the through hole, the body part is positioned between the friction component and the electromagnet, the body part can be abutted against or separated from the friction component, and the eccentric wheel is rotatably connected with one end of the connecting part far away from the body part; when the eccentric wheel is located at the locking position, the periphery of the eccentric wheel is abutted against the electromagnet or the shell, and the armature is driven to move towards the direction far away from the friction assembly, so that the body part is separated from the friction assembly.
In a second aspect, an embodiment of the present invention provides a wind power generator, including the electric hoist according to any one of the foregoing embodiments.
The electric hoist of the embodiment of the invention has the beneficial effects that: the main shaft of the electric hoist of the embodiment of the invention is under the action of external force, for example: when the rotating speed of the main shaft is higher than a preset speed, the centrifugal assembly can extend out of the friction assembly under the action of centrifugal force and is in friction abutment with the inner wall of the shell so as to limit the rotating speed of the main shaft; therefore, when the electric hoist is used for escaping and descending, the rotating speed of the main shaft is prevented from being too fast, namely, the escaping personnel can jump down to escape by using the electric hoist and the rotating speed of the main shaft is higher than the preset speed, the centrifugal assembly is supported by the friction of the inner wall of the shell, the continuous rotating speed of the main shaft is prevented from being increased, the slow descending effect is achieved, the escaping personnel are prevented from falling and being damaged under the too fast gravitational acceleration, and the electric hoist is enabled to be applied to high-altitude escaping.
The wind driven generator of the embodiment of the invention has the beneficial effects that: the wind driven generator provided by the embodiment of the invention is provided with the electric hoist, and when the escape from the wind driven generator is needed, the electric hoist can be used for high-altitude escape and slow descent escape.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a sectional view of an electric hoist in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a brake assembly and friction assembly in an embodiment of the present invention;
fig. 3 is a sectional view taken along a-a in fig. 2.
Icon: 010-electric hoist; 100-a housing; 200-speed limiting hoisting mechanism; 300-a brake assembly; 210-a hoisting assembly; 220-a friction assembly; 230-a centrifuge assembly; 221-a first friction member; 222-a second friction member; 223-mounting clearance; 224-a friction disc; 225-main shaft; 226-friction block; 231-centrifugal mass; 232-a first elastic member; 227-sliding clearance; 310-an armature; 320-a second elastic member; 330-an electromagnet; 240-eccentric wheel; 241-a handle; 311-a body portion; 312-a connecting portion; 331-a through hole; 211-a motor; 212-a sprocket; 213-a hoisting chain; 313-attachment hole; 314-a guide post; 315-fastener.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present embodiment provides an electric hoist 010, which includes a housing 100, a main shaft 225, a friction element 220 and a centrifugal element 230, wherein the main shaft 225 is mounted on the housing 100 and can rotate relative to the housing 100, the main shaft 225 is fixedly connected to the friction element 220, and the centrifugal element 230 is disposed on the friction element 220; when the rotation speed of the main shaft 225 exceeds a preset speed, the centrifugal assembly 230 can extend out of the friction assembly 220 under the action of centrifugal force and is in friction abutment with the inner wall of the shell 100, so as to limit the rotation speed of the main shaft 225; when the rotation speed of the main shaft 225 does not exceed the preset speed, the centrifugal assembly 230 does not contact the inner wall of the housing 100, and the main shaft 225 is rotated at a speed not higher than the preset speed.
The electric hoist 010 of the present embodiment can be used for high-altitude escape, when the main shaft 225 is under the action of external force, for example: when the rotation speed of the main shaft 225 is higher than a preset speed, the centrifugal component 230 can extend out of the friction component 220 and be in friction abutment with the inner wall of the shell 100 under the action of centrifugal force so as to limit the rotation speed of the main shaft 225; therefore, when the electric hoist 010 is used for escape and landing, the rotation speed of the main shaft 225 is prevented from being too high, namely, the escape personnel can jump down to escape by the electric hoist 010 and the rotation speed of the main shaft 225 is higher than the preset speed, the centrifugal component 230 is abutted against the inner wall of the shell 100 by friction, the continuous rotation speed of the main shaft 225 is prevented from being increased, the slow descending effect is achieved, the escape personnel are prevented from being damaged by falling under the too high gravitational acceleration, and the electric hoist 010 can be applied to high-altitude escape.
It should be noted that the electric hoist 010 of this embodiment may be used in high-altitude operation equipment such as a wind turbine generator, a tower crane, and the like.
Further, the electric hoist 010 of the embodiment further includes a speed-limiting hoisting mechanism 200 and a brake assembly 300, wherein the brake assembly 300 is disposed on the housing 100; the brake assembly 300 is used for braking or releasing the speed-limiting hoisting mechanism 200; the speed-limiting lifting mechanism 200 comprises a lifting component 210, the friction component 220 and a main shaft 225, wherein the friction component 220 is rotatably arranged in the shell 100, and the friction component 220, the centrifugal component 230 and the main shaft 225 can synchronously rotate; the lifting assembly 210 is drivingly connected to the main shaft 225. Brake assembly 300 cooperates with friction assembly 220 to brake spindle 225 from rotating or to release spindle 225 from rotating.
When the brake assembly 300 releases the speed-limiting lifting mechanism 200 and the lifting assembly 210 drives the main shaft 225 and the friction assembly 220 to rotate at a speed not higher than the preset speed, the centrifugal assembly 230 does not contact with the inside of the housing 100, and the main shaft 225 and the friction assembly 220 keep rotating at a speed not higher than the preset speed; when the brake assembly 300 releases the speed-limiting lifting mechanism 200 and the rotation speed of the main shaft 225 and the friction assembly 220 is higher than the preset speed, the centrifugal assembly 230 extends out of the friction assembly 220 and is in friction contact with the inner wall of the housing 100 under the action of centrifugal force to limit the rotation speed of the main shaft 225 and the friction assembly 220.
It should be noted that, when the brake assembly 300 of the present embodiment releases the speed-limiting lifting mechanism 200, the lifting assembly 210 can drive the main shaft 225 and the friction assembly 220 to rotate synchronously therewith; alternatively, when an external force acts on the lifting assembly 210 to rotate the lifting assembly 210, the lifting assembly 210 can drive the main shaft 225 and the friction assembly 220 to rotate; when an external force is applied to the friction assembly 220 and the main shaft 225 to affect the rotation of the friction assembly 220 and the main shaft 225, the friction assembly 220 may also adversely affect the rotation state of the lifting assembly 210.
The electric hoist 010 of the present embodiment has three different states, the first state is a standing state, and when the brake assembly 300 brakes the speed-limiting lifting mechanism 200, the lifting assembly 210 of the speed-limiting lifting mechanism 200 is in a standing and non-operating state; the second is a working state, when the brake assembly 300 releases the speed-limiting lifting mechanism 200, the lifting assembly 210 of the speed-limiting lifting mechanism 200 can rotate to lift or put down an object; in the third escape state, when the brake assembly 300 releases the speed-limiting lifting mechanism 200, an external force can be applied to the lifting assembly 210, so that the lifting assembly 210 rotates and synchronously drives the main shaft 225 and the friction assembly 220 to rotate, for example: when the braking component 300 releases the speed-limiting lifting mechanism 200, a person needing to escape can apply an external force on the lifting component 210 to escape by utilizing the lifting component 210, and synchronously drive the spindle 225 and the friction component 220 to rotate when the force is applied to the lifting component 210, and when the rotation speed of the friction component 220 and the spindle 225 is greater than a preset speed, the centrifugal component 230 is in friction contact with the inner wall of the shell 100 under the action of centrifugal force to limit the rotation speed of the friction component 220 and the spindle 225 and limit the rotation speed of the lifting component 210.
Therefore, the electric hoist 010 of the embodiment has the lifting function of a common electric hoist and can be used for escape, and when the electric hoist 010 is used for escape, the rotation speed of the main shaft 225 is limited by the friction between the centrifugal component 230 and the inner wall of the shell 100, the rotation of the lifting component 210 is limited, the speed of the lifting component 210 for descending escape personnel is reduced, and the slow descent escape is realized.
Referring to fig. 1, the lifting assembly 210 of the present embodiment includes a motor 211, a sprocket 212 and a lifting chain 213, the sprocket 212 is fixedly sleeved on a main shaft 225, and one end of the main shaft 225 is connected to an output shaft of the motor 211, and the other end is connected to a friction assembly 220; the lifting chain 213 is connected with the chain wheel 212; when the brake assembly 300 releases the speed-limiting lifting mechanism 200, the output shaft of the motor 211 can drive the main shaft 225 to drive the chain wheel 212 to rotate, and the rotating chain wheel 212 can roll up the lifting chain 213 or release the lifting chain 213, so as to realize the function of lifting or releasing an object connected to the lifting chain 213, i.e. the working state, at the moment, the friction assembly 220 synchronously rotates along with the main shaft 225 and the chain wheel 212, the rotating speeds of the friction assembly 220, the lifting assembly 210 and the main shaft 225 are not higher than the preset speed, and the centrifugal assembly 230 is not in contact with the inside of the shell 100; when the brake assembly 300 releases the speed-limiting lifting mechanism 200, the motor 211 is not operated, and an external force is applied to drag the lifting chain 213, for example: when people drag the lifting chain 213 to jump downwards from a high position, the lifting chain 213 can be released from the chain wheel 212 under the action of external force, namely, when the lifting chain 213 is dragged by the external force, the chain wheel 212 can rotate under the action of the lifting chain 213, the main shaft 225, the friction component 220 and the centrifugal component 230 are driven to synchronously rotate when the chain wheel 212 rotates, when the rotating speed of the main shaft 225 driven by the lifting chain 213 is greater than a preset speed, the centrifugal component 230 is in frictional contact with the inner wall of the shell 100 under the action of the centrifugal force, so that the rotating speeds of the main shaft 225, the friction component 220 and the chain wheel 212 can be prevented from being continuously increased through the frictional force between the centrifugal component 230 and the inner wall of the shell 100, the speed limiting effect is achieved, particularly, when the electric hoist is used for descending and escaping from the high position, the slow descending effect can be achieved, and the escape is facilitated.
It should be noted that the above-mentioned preset rates may be differentiated when the friction coefficient between the centrifugal assembly 230 and the casing 100 is different, for example: the speed of the electric hoist 010 is 1m/s, that is, the speed of the electric hoist 010 generally lifting and lowering a heavy object is not higher than 1m/s, and when the evacuee drags the hoisting chain 213 of the hoisting assembly 210 to jump down and the speed generated after free fall is higher than 1m/s, the centrifugal assembly 230 can rub against the inner wall of the housing 100 to limit the rotation speed of the friction assembly 220 and the hoisting assembly 210.
It should be further noted that, in the electric hoist 010 of the embodiment, the centrifugal component 230 disposed on the friction component 220 limits the descending rate of the escape person dragging the lifting chain 213 to jump down, so as to sufficiently reduce the descending rate of the escape person, and reduce the damage caused by the over-fast landing speed of the escape person when the escape person drops down, that is, when the electric hoist 010 is used for escaping from a height, and when the escape person drags the lifting chain 213 to fall down to have a certain descending rate, the main shaft 225 and the friction component 220 rotate together with the chain wheel 212 to the centrifugal component 230 and the inner part of the housing 100 to be frictionally held, so as to limit the rotation speed of the main shaft 225, that is, limit the releasing rate of the lifting chain 213 from the chain wheel 212, and avoid the descending rate of the escape person from increasing continuously, that is, the electric hoist 010 of the embodiment is used for slow-down escape is implemented.
Referring to fig. 2 and 3, the friction assembly 220 of the present embodiment further includes a first friction member 221 and a second friction member 222 connected to each other, the first friction member 221 and the second friction member 222 are distributed along the axial direction of the casing 100, a mounting gap 223 is formed between the first friction member 221 and the second friction member 222, and the centrifugal assembly 230 is disposed in the mounting gap 223; the main shaft 225 is connected to the first friction member 221, so that when the main shaft 225 rotates, the first friction member 221 is driven to rotate, and the centrifugal assembly 230 is driven to rotate.
The second friction piece 222 is positioned between the first friction piece 221 and the brake assembly 300, and the brake assembly 300 is matched with or separated from the second friction piece 222 to brake or release the speed-limiting lifting mechanism 200, namely when the brake assembly 300 is matched with the second friction piece 222, the brake assembly 300 can brake the speed-limiting lifting mechanism 200 to enable the electric hoist 010 to be in a static and non-working state; when the brake assembly 300 is separated from the second friction member 222, the brake assembly 300 releases the speed-limiting lifting mechanism 200, so that the electric hoist is in a working or escaping state.
Further, when the brake assembly 300 is separated from the second friction member 222, the brake assembly 300 releases the speed-limiting lifting mechanism 200, and at this time, if the electric hoist 010 is used for escaping, when the rotating speed of the friction assembly 220 is higher than a preset speed, the centrifugal assembly 230 can move in the installation gap 223, so that the centrifugal assembly 230 and the inner wall of the housing 100 rub against each other, thereby preventing the lifting assembly 210 in transmission connection with the centrifugal assembly 230 from continuously accelerating, controlling the escaping speed, and achieving the effect of slow descent.
Referring to fig. 1 and fig. 3, the first friction member 221 includes a friction disc 224, the friction disc 224 is connected to a main shaft 225, one end of the main shaft 225 extends out of the housing 100 and is connected to the sprocket 212, the other end of the main shaft 225 is connected to the second friction member 222, a mounting gap 223 is formed between the friction disc 224 and the second friction member 222, one end of the centrifugal assembly 230 is fixedly connected to the main shaft 225, and the other end of the centrifugal assembly 230 is separated from or frictionally engaged with an inner wall of the housing 100 so as to rotate synchronously with the main shaft 225, the friction assembly 220, and the centrifugal assembly 230 disposed in the mounting gap 223.
When the electric hoist 010 is in a working state, and the output shaft of the motor 211 rotates at a speed not higher than a preset speed, the output shaft of the motor 211 drives the main shaft 225 and the chain wheel 212 to rotate, that is, the motor 211 synchronously drives the chain wheel 212, the first friction member 221, the second friction member 222 and the centrifugal assembly 230 arranged in the mounting gap 223 to synchronously rotate, and the centrifugal assembly 230 does not contact with the inner wall of the housing 100 when rotating at a speed not higher than the preset speed, so that when the motor 211 operates, the original rotation speed can be maintained, and articles placed on the chain can be hoisted or put down; when the electric hoist 010 is in an escape state, an evacuee drags a chain to jump down from a high position, the chain drives the chain wheel 212 to rotate, and synchronously drives the main shaft 225, the first friction member 221, the second friction member 222 and the centrifugal assembly 230 arranged in the installation gap 223 to synchronously rotate, when the evacuee falls to a state that the descending speed is higher than a preset speed, the speed of the main shaft 225, the friction assembly 220 and the centrifugal assembly 230 is higher than the preset speed, the centrifugal assembly 230 moves in the installation gap 223 to be in frictional contact with the inner wall of the shell 100 to limit the rotation of the first friction member 221 and the second friction member 222, namely the rotation speeds of the main shaft 225 and the chain wheel 212 and the speed of the chain wheel 212 releasing the chain are limited, so that the descending speed during escape is controlled, and a slow descending effect is realized.
Referring to fig. 2, the centrifugal assembly 230 includes a centrifugal block 231 and a first elastic member 232, one end of the first elastic member 232 is fixedly connected to the main shaft 225, the other end is connected to the centrifugal block 231, and the centrifugal block 231 is separated from or rubbed against the inner wall of the housing 100; the first elastic member 232 is configured to make the centrifugal block 231 always have a tendency to be separated from the inner wall of the housing 100.
When the electric hoist 010 is in a working state and the motor 211 drives the sprocket 212, the spindle 225 and the friction element 220 to rotate synchronously at a speed not higher than a predetermined speed, the centrifugal block 231 of the centrifugal element 230 in the mounting gap 223 does not move to contact with the inner wall of the housing 100 under the elastic action of the first elastic element 232, so that no friction is formed between the centrifugal block 231 and the inner wall of the housing 100; when the electric hoist 010 is in an escape state, the motor 211 stops operating, the evacuee drags the lifting chain 213 to jump downwards from a high position, the lifting chain 213 is released from the chain wheel 212 under the gravity of the evacuee, the lifting chain 213 drives the chain wheel 212, the main shaft 225, the friction assembly 220 and the centrifugal assembly 230 to rotate, when the evacuee descends to a certain height and has a speed higher than a preset speed, the main shaft 225, the friction assembly 220 and the centrifugal assembly 230 all rotate at a speed higher than the preset speed, so that the centrifugal block 231 located in the installation gap 223 overcomes the elastic force of the first elastic member 232 to move to be in contact and abutting contact with the inner wall of the housing 100, and generates friction during rotation, so that the friction between the centrifugal block 231 and the inner wall of the housing 100 interferes with the friction interference of the friction assembly 220 and the main shaft 225 to continuously accelerate rotation, thereby interfering with the continuous accelerated rotation of the chain wheel 212, and finally realizing the effect of interfering the release speed of the lifting chain 213, the descending speed of the escape personnel can be slowed down, and the slow descending effect is achieved.
The first elastic member 232 can be selected according to the requirement, and the first elastic member 232 of the present embodiment is a tension spring; in other embodiments, the first elastic member 232 may also be an elastic rubber block or the like.
Two ends of the first elastic element 232 of the present embodiment are respectively welded with the main shaft 225 and the centrifugal block 231; in other embodiments, the connection manner of the first elastic element 232, the main shaft 225 and the eccentric block 231 may also be a snap connection, an adhesive connection, or the like.
Referring to fig. 2, the first friction member 221 of the present embodiment further includes at least two friction blocks 226, each friction block 226 is connected to the friction disc 224, and one end of the friction block 226 away from the friction disc 224 is connected to the second friction member 222, a sliding gap 227 is formed between two adjacent friction blocks 226, and the centrifugal assembly 230 is located in the sliding gap 227; so configured, the centrifugal block 231 of the centrifugal assembly 230 can move in the sliding gap 227, and the moving path of the centrifugal block 231 is prevented from being deviated; when the electric hoist 010 is used for escaping from a high place and the speed of the main shaft 225 and the friction component 220 is higher than the preset speed, the centrifugal block 231 can stably move to be in contact with and rub against the inner wall of the shell 100, so that the speed limiting and slow descending functions during escaping can be stably realized.
It should be noted that the friction block 226 can also be used to support the installation gap 223 between the friction disc 224 and the second friction member 222, so that the centrifugal block 231 can smoothly move in the installation gap 223.
In the present embodiment, the friction disc 224 of the first friction member 221 is a disc, the second friction member 222 is a disc having the same diameter as the friction disc 224, and the housing 100 has a mounting cavity with a circular cross section for mounting the friction assembly 220, that is, the first friction member 221 and the second friction member 222 are both disposed in the mounting cavity; so set up for friction pack 220 can be stable, smooth rotation in the installation cavity of casing 100.
The main shaft 225 of the first friction member 221 overlaps with the axis of the friction disc 224, that is, the main shaft 225 and the friction disc 224 are coaxially arranged, and the electric hoist 010 includes a plurality of centrifugal assemblies 230, and the plurality of centrifugal assemblies 230 are distributed around the circumference of the main shaft 225; further, a plurality of centrifugal assemblies 230 are fanned around the circumference of the main shaft 225; with such an arrangement, when the speed of the friction assembly 220 and the lifting assembly 210 is higher than the preset speed, the plurality of centrifugal assemblies 230 can be used for rubbing against the inner wall of the housing 100, so as to achieve a better speed limiting effect.
Further, the plurality of centrifugal assemblies 230 are uniformly distributed around the circumference of the main shaft 225, so that when the velocity of the friction assembly 220 and the lifting assembly 210 is higher than the preset velocity, the plurality of centrifugal assemblies 230 uniformly distributed more uniformly and stably limit the acceleration of the friction assembly 220 and the lifting assembly 210, thereby more effectively achieving the effect of reducing the velocity.
The number of the friction blocks 226 and the number of the centrifugal assemblies 230 may be selected as required, the number of the friction blocks 226 and the number of the centrifugal assemblies 230 in this embodiment are four, the four friction blocks 226 are spaced apart along the circumferential direction of the friction disc 224, a sliding gap 227 is provided between each two adjacent friction blocks 226, one centrifugal assembly 230 is provided in each sliding gap 227, and the centrifugal block 231 of each centrifugal assembly 230 can move in the sliding gap 227.
In other embodiments, the number of friction blocks 226 and centrifugal assemblies 230 may also be two, three, etc.
Referring to fig. 3, the brake assembly 300 of the present embodiment includes an armature 310, a second elastic member 320, and an electromagnet 330, wherein the armature 310 is located between the friction assembly 220 and the electromagnet 330, and the armature 310 abuts against or separates from the friction assembly 220; the electromagnet 330 is magnetically attracted or separated from the armature 310; a second elastic member 320 is disposed between the armature 310 and the electromagnet 330, the second elastic member 320 being configured to cause the armature 310 to always have a tendency to abut the friction member 220; when the electromagnet 330 is de-energized, the second elastic member 320 can push the armature 310 to abut against the friction assembly 220; when the electromagnet 330 is energized, the electromagnet 330 can magnetically attract the armature 310 to overcome the elastic force of the second elastic member 320.
When the electromagnet 330 is powered off, the electromagnet 330 has no adsorption, the electromagnet 330 can be separated from the armature 310, and the armature 310 moves towards the friction component 220 to abut against the friction component 220 under the elastic action of the second elastic element 320, so that the rotation of the friction component 220 can be limited, and the friction component 220 is braked, namely the speed-limiting hoisting mechanism 200 is braked; when the electromagnet 330 is energized, the electromagnet 330 is attracted, and the electromagnet 330 is attracted to the armature 310, so that the armature 310 moves away from the friction assembly 220, i.e., the armature 310 and the friction assembly 220 are separated, and the friction assembly 220, i.e., the speed-limiting lifting mechanism 200, is released.
It should be noted that when the electromagnet 330 of the brake assembly 300 is powered off, the electric hoist 010 is in a static state, i.e., a non-operating state; when the electromagnet 330 of the brake assembly 300 is energized, the electric block 010 can be in an operating state.
Referring to fig. 3, the armature 310 of the present embodiment has a connection hole 313, the housing 100 is fixedly connected with a guide post 314, the guide post 314 is slidably inserted into and matched with the connection hole 313, the guide post 314 has a threaded hole, the electromagnet 330 has a fastening member 315, the fastening member 315 can be threadedly connected with the threaded hole, so that the armature 310 can slide along the axial direction of the guide post 314 to enable the armature 310 to approach the friction component 220 or approach the electromagnet 330. The fastening member 315 includes a bolt, a screw, and the like.
The second elastic member 320 of this embodiment is a compression spring, the compression spring is sleeved on the guide post 314, and two ends of the compression spring are respectively connected to the armature 310 and the electromagnet 330; thus, when the electromagnet 330 is de-energized, the compression spring can stably drive the armature 310 to move into abutment with the friction member 220 under the guidance of the guide post 314.
It should be noted that, the number of the connecting holes 313, the guide posts 314, the fastening members 315 and the second elastic members 320 may be the same, the number of the connecting holes 313, the guide posts 314, the fastening members 315 and the second elastic members 320 in this embodiment is four, the four guide posts 314 are uniformly distributed on the periphery of the limiting assembly, the four guide posts 314 are in one-to-one slidable insertion fit with the four connecting holes 313, the four guide posts 314 are in one-to-one threaded fit with the four fastening members 315, and each guide post 314 is sleeved with one second elastic member 320. In other embodiments, the number of the connection holes 313, the guide posts 314, the fastening members 315, and the second elastic members 320 may also be one, two, three, etc.
Referring to fig. 3, the brake assembly 300 of the present embodiment further includes an eccentric 240, wherein the eccentric 240 is rotatably connected to the armature 310; the eccentric 240 has a locked position; when the eccentric wheel 240 is located at the locking position and the electromagnet 330 is powered off, the eccentric wheel 240 drives the armature 310 to be separated from the friction component 220, and the electric hoist 010 is in an escape state; therefore, even if the electromagnet 330 is powered off and the eccentric wheel 240 moves to the locking position, the armature 310 can be separated from the friction component 220, the brake component 300 can release the speed-limiting lifting mechanism 200, the electric hoist 010 is used for escaping in the state, the electromagnet 330 is not used for releasing the speed-limiting lifting mechanism 200, the electromagnet 330 is further protected, and the damage of the electromagnet 330 is reduced.
Further, referring to fig. 3, the armature 310 of the present embodiment includes a body portion 311 and a connecting portion 312, the electromagnet 330 has a through hole 331, the connecting portion 312 is slidably inserted into the through hole 331, the body portion 311 is located between the friction component 220 and the electromagnet 330, the body portion 311 can be abutted to or separated from the friction component 220, and the eccentric wheel 240 is rotatably connected with one end of the connecting portion 312 away from the body portion 311; when the eccentric 240 is in the locked position, the outer periphery of the eccentric 240 abuts against the electromagnet 330 and drives the armature 310 to move away from the friction assembly 220, so that the body 311 is separated from the friction assembly 220.
It should be noted that, referring to fig. 1, the eccentric wheel 240 further has an unlocking position, and when the eccentric wheel 240 rotates to the unlocking position, a preset distance is provided between the outer periphery of the eccentric wheel 240 and the electromagnet 330, so that the connecting portion 312 can slide in the through hole 331, i.e. the armature 310 can slide in the axial direction of the connecting portion 312 relative to the electromagnet 330; when the eccentric wheel 240 is located at the unlocking position and the electromagnet is powered on, the electromagnet 330 adsorbs the armature 310, so that the armature 310 moves to be separated from the friction assembly 220 along the axial direction of the connecting part 312, and the electric hoist 010 is in a working state; when the eccentric wheel 240 is located at the unlocking position and the electromagnet 330 is powered off, the armature 310 moves along the axial direction of the connecting portion 312 to abut against the friction assembly 220 under the elastic action of the second elastic member 320, and the electric hoist 010 is in a braking static state.
In other embodiments, the outer circumference of the eccentric 240 in the locked position abuts the housing 100.
Referring to fig. 3, the eccentric wheel 240 of the present embodiment is further connected with a handle 241, so that the handle 241 can be moved to adjust the position of the eccentric wheel 240; further, the eccentric 240 is rotatably connected to the connecting portion 312 of the armature 310 via a rotating shaft.
The body portion 311 and the connection portion 312 of the armature 310 in this embodiment are integrally formed; in other embodiments, the body portion 311 and the connection portion 312 of the armature 310 may also be welded or connected with a fastener 315, etc.
The body part 311 of the armature 310 of the embodiment can abut against or separate from the second friction piece 222 of the friction component 220 to brake or release the friction component 220, so as to brake or release the main shaft 225 connected with the friction component 220, that is, when the body part 311 of the armature 310 abuts against the side of the second friction piece 222 away from the first friction piece 221, the brake component 300 brakes the friction component 220, the electric hoist 010 is in a static state, and neither the friction component 220 nor the main shaft 225 can rotate; when the body portion 311 of the armature 310 is separated from the side of the second friction member 222 facing away from the first friction member 221, the brake assembly 300 releases the friction assembly 220, and the electric block 010 can be in an operating state or an escape state.
The embodiment also provides a wind driven generator, which comprises the electric hoist 010; the electric hoist 010 arranged on the wind driven generator can be used for lifting articles and escaping from a high place.
The working principle of the electric hoist 010 of the embodiment includes:
the eccentric wheel 240 is moved to the unlocking state, the electromagnet 330 is powered off, and the armature 310 moves to be abutted against the second friction piece 222 under the action of the second elastic piece 320 so as to brake the friction component 220 and the lifting component 210, namely the speed-limiting lifting mechanism 200, and the electric hoist 010 is in the standing state.
The eccentric wheel 240 is moved to an unlocking state, the electromagnet 330 is electrified, the electromagnet 330 adsorbs the armature 310 to overcome the elastic action of the second elastic piece 320, the armature 310 moves to be separated from the second friction piece 222 to release the friction component 220 and the lifting component 210, namely the speed-limiting lifting mechanism 200 is released, and the electric hoist 010 is in a working state; at this time, under the driving of the motor 211, the lifting chain 213 can be wound around the sprocket 212 or released from the sprocket 212, and the friction assembly 220 rotates synchronously with the main shaft 225 while the main shaft 225 is driven by the motor 211 to drive the sprocket 212 to rotate, because the rotation speed of the output shaft of the motor 211 in the working state is not higher than the preset speed, the centrifugal force applied to the centrifugal block 231 of the centrifugal assembly 230 is smaller than the elastic force of the first elastic member 232, and the centrifugal block 231 is kept separated from the inner wall of the housing 100, that is, the centrifugal assembly 230 does not limit the speed at which the motor 211 releases the lifting chain 213 or retracts the lifting chain 213 in the working state.
The eccentric wheel 240 is moved to a locking state, the electromagnet 330 is powered off, the eccentric wheel 240 drives the armature 310 to overcome the elastic action of the second elastic piece 320 and lock the armature 310 at a position separated from the second elastic piece 222, namely, the brake assembly 300 releases the friction assembly 220 and the lifting assembly 210, namely, the brake assembly 300 releases the speed-limiting lifting mechanism 200, and the electric hoist 010 is in an escape state; at this time, if there is a worker needing to escape, the worker can drag the lifting chain 213 to jump downwards from a high position, the lifting chain 213 is dragged to be released from the chain wheel 212 by the gravity of the worker, and synchronously pull the sprocket 212, the main shaft 225, the friction assembly 220 and the centrifugal assembly 230 to rotate, when the descending speed of the staff is higher than the preset speed under the action of the gravity acceleration of the staff, the centrifugal block 231 of the centrifugal assembly 230 overcomes the elastic action of the first elastic member 232 under the action of the centrifugal force, the centrifugal block 231 rubs against the inner wall of the housing 100, to interfere with the continuous acceleration of the friction assembly 220 and the main shaft 225, thereby limiting the continued acceleration of sprocket 212, and interfering with the rate at which lifting chain 213 is released, namely, the continuous accelerated release of the hoisting chain 213 is avoided, so that the escape descending speed of the workers is limited, and the slow descending escape effect is achieved.
In summary, the electric hoist 010 of the embodiment can be used for high-altitude escape, when the rotation speed of the main shaft 225 is higher than the preset speed under the action of the external force, the centrifugal component 230 can extend out of the friction component 220 and be in friction contact with the inner wall of the housing 100 under the action of the centrifugal force to limit the rotation speed of the main shaft 225; therefore, when the electric hoist 010 is used for escape and landing, the rotation speed of the main shaft 225 is prevented from being too high, namely, the escape personnel can jump down to escape by the electric hoist 010 and the rotation speed of the main shaft 225 is higher than the preset speed, the centrifugal component 230 is abutted against the inner wall of the shell 100 by friction, the continuous rotation speed of the main shaft 225 is prevented from being increased, the slow descending effect is achieved, the escape personnel are prevented from being damaged by falling under the too high gravitational acceleration, and the electric hoist 010 can be applied to high-altitude escape.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An electric hoist is characterized by comprising a shell (100), a main shaft (225), a friction component (220) and a centrifugal component (230), wherein the main shaft (225) is mounted on the shell (100) and can rotate relative to the shell (100), the main shaft (225) is fixedly connected with the friction component (220), and the centrifugal component (230) is arranged on the friction component (220);
when the rotating speed of the main shaft (225) exceeds a preset speed, the centrifugal assembly (230) can extend out of the friction assembly (220) under the action of centrifugal force and is in friction abutment with the inner wall of the shell (100) so as to limit the rotating speed of the main shaft (225); when the rotation speed of the main shaft (225) does not exceed the preset speed, the centrifugal assembly (230) is not in contact with the inner wall of the shell (100), and the main shaft (225) keeps rotating at a speed not higher than the preset speed;
the electric hoist further comprises a brake assembly (300), the brake assembly (300) is arranged on the shell (100), and the brake assembly (300) is used for being matched with the friction assembly (220) to brake the main shaft (225) or release the main shaft (225);
the brake assembly (300) comprises an armature (310), a second elastic piece (320) and an electromagnet (330);
the armature (310) is positioned between the friction component (220) and the electromagnet (330), and the armature (310) is abutted against or separated from the friction component (220); the electromagnet (330) is magnetically attracted or separated from the armature (310);
the second elastic member (320) is arranged between the armature (310) and the electromagnet (330), and the second elastic member (320) is configured to enable the armature (310) to always have the tendency to abut against the friction component (220);
when the electromagnet (330) is powered off, the second elastic piece (320) can push the armature (310) to abut against the friction component (220); when the electromagnet (330) is electrified, the electromagnet (330) can magnetically attract the armature (310) to overcome the elastic force of the second elastic piece (320);
the friction assembly (220) further comprises a first friction piece (221) and a second friction piece (222) which are connected with each other, the first friction piece (221) and the second friction piece (222) are distributed along the axial direction of the shell (100), and the main shaft (225) is connected with the first friction piece (221); a mounting gap (223) is formed between the first friction member (221) and the second friction member (222), and the centrifugal assembly (230) is arranged in the mounting gap (223);
the armature (310) abuts against or separates from the second friction member (222) to brake or release the friction assembly (220).
2. The electric block of claim 1, characterized in that the first friction member (221) comprises a friction disc (224), the friction disc (224) is connected with a main shaft (225), one end of the main shaft (225) extends out of the housing (100) and the other end is connected with the second friction member (222), the mounting gap (223) is arranged between the friction disc (224) and the second friction member (222), one end of the centrifugal assembly (230) is fixedly connected with the main shaft (225), and the other end is separated from or in friction fit with the inner wall of the housing (100).
3. The electric hoist according to claim 2, characterized in that the centrifugal assembly (230) comprises a centrifugal block (231) and a first elastic member (232), one end of the first elastic member (232) is fixedly connected with the main shaft (225), the other end is connected with the centrifugal block (231), and the centrifugal block (231) is separated from or frictionally engaged with the inner wall of the housing (100); the first elastic member (232) is configured to make the centrifugal block (231) always have a tendency to be separated from the inner wall of the housing (100).
4. The electric block of claim 2, characterized in that the first friction member (221) further comprises at least two friction blocks (226), each friction block (226) is connected with the friction disc (224), and one end of the friction block (226) far away from the friction disc (224) is connected with the second friction member (222), two adjacent friction blocks (226) have a sliding gap (227) therebetween, and the centrifugal assembly (230) is located in the sliding gap (227).
5. Electric block of claim 1, characterized in that the braking assembly (300) further comprises an eccentric (240), the eccentric (240) being rotatably connected with the armature (310); the eccentric (240) has a locked position;
when the eccentric (240) is in the locked position and the electromagnet (330) is de-energized, the eccentric (240) drives the armature (310) to disengage from the friction assembly (220).
6. The electric block as claimed in claim 5, characterized in that the armature (310) comprises a connecting body portion (311) and a connecting portion (312), the electromagnet (330) has a through hole (331), the connecting portion (312) is slidably inserted into the through hole (331), the body portion (311) is located between the friction component (220) and the electromagnet (330), the body portion (311) can be abutted against or separated from the friction component (220), and the eccentric (240) is rotatably connected with one end of the connecting portion (312) far away from the body portion (311);
when the eccentric wheel (240) is located at the locking position, the outer periphery of the eccentric wheel (240) abuts against the electromagnet (330) or the shell (100) and drives the armature (310) to move in a direction away from the friction component (220), so that the body part (311) is separated from the friction component (220).
7. Wind generator, characterized in that it comprises an electric block (010) according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029649.5A CN110745727B (en) | 2019-10-25 | 2019-10-25 | Electric hoist and wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029649.5A CN110745727B (en) | 2019-10-25 | 2019-10-25 | Electric hoist and wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN110745727A CN110745727A (en) | 2020-02-04 |
| CN110745727B true CN110745727B (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911029649.5A Active CN110745727B (en) | 2019-10-25 | 2019-10-25 | Electric hoist and wind driven generator |
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| Country | Link |
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| CN (1) | CN110745727B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113772572B (en) * | 2021-09-26 | 2023-03-24 | 枣庄矿业（集团）有限责任公司柴里煤矿 | Energy-saving hoisting winch for coal mine |
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| CN2818435Y (en) * | 2005-07-25 | 2006-09-20 | 余万松 | Miniature electric hoister |
| CN201410236Y (en) * | 2009-06-10 | 2010-02-24 | 何国苗 | Illumination alarming descent control device adopting micro-generator for speed limit control |
| CN201668883U (en) * | 2010-06-08 | 2010-12-15 | 德州学院 | Building escape system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404889A (en) * | 2001-08-16 | 2003-03-26 | 张海楠 | High-building intelligent life saver and microcomputer monitoring-controlling system |
| CN206397980U (en) * | 2016-12-27 | 2017-08-11 | 陕西老枪科技工程有限公司 | Electromagnetic brake is released manually |
| CN208087103U (en) * | 2018-03-28 | 2018-11-13 | 佳力机械股份有限公司 | Electric block suitable for wind turbine |
| CN208631996U (en) * | 2018-07-26 | 2019-03-22 | 法兰泰克重工股份有限公司 | Explosion-proof electric block lifting mechanism safety catch |
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|---|---|---|---|---|
| CN2090281U (en) * | 1989-08-05 | 1991-12-11 | 蒋文斌 | Safety life-saving apparatus |
| CN2280782Y (en) * | 1996-02-04 | 1998-05-06 | 青岛石油机械厂 | Unloading protecting mechanism for chain oil-sucking machine |
| CN2818435Y (en) * | 2005-07-25 | 2006-09-20 | 余万松 | Miniature electric hoister |
| CN201410236Y (en) * | 2009-06-10 | 2010-02-24 | 何国苗 | Illumination alarming descent control device adopting micro-generator for speed limit control |
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| CN110745727A (en) | 2020-02-04 |
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Address after: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee after: Sany Heavy Energy Co.,Ltd. Address before: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee before: SANY HEAVY ENERGY Co.,Ltd. |