CN109205434B - Overspeed-preventing elevator traction device - Google Patents
Overspeed-preventing elevator traction device Download PDFInfo
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- CN109205434B CN109205434B CN201811344295.9A CN201811344295A CN109205434B CN 109205434 B CN109205434 B CN 109205434B CN 201811344295 A CN201811344295 A CN 201811344295A CN 109205434 B CN109205434 B CN 109205434B
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- centrifugal
- piece
- traction
- overspeed
- elevator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an overspeed prevention elevator traction device, which is characterized in that when an elevator is in overspeed, a safety module is powered off by triggering a centrifugal disc, a control module electrically connected with the safety module is triggered, a brake is finally used for braking a traction sheave, and then the brake is directly fed back to the traction sheave to realize rapid braking by the overspeed of the elevator; the centrifugal force directly acts on the centrifugal piece, so that the centrifugal piece eccentrically runs and touches the shifting plate, and the brake is triggered; through the outage to the motor, not only make the motor lose power, but also still braked to the driving sheave through the stopper, made the hoisting device not only obtain life's assurance like this, but also avoided the influence to the car after the braking.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to an overspeed preventing elevator traction device.
Background
An elevator is a vertical elevator powered by an electric motor and equipped with a box-like car for carrying people or cargo in a multi-story building. Elevators have become important building facilities and are indispensable in high-rise buildings and public places as transportation vehicles in the vertical direction. With the development of computer technology, automation technology and power electronics technology, modern elevators have become typical mechatronic products. With the improvement of the whole national economic strength, the living consumption level of people is obviously increased, and real estate developers vigorously push out middle-high-grade small high-rise buildings and high-rise residential buildings, so that the residential elevators are driven to rapidly increase, and the residential elevators become the main growth point of the whole elevator market.
However, as the floors are increased, the running speed of the elevator is increased, the difficulty of elevator overspeed control is increased, most elevators adopt a mode of car safety gear protection to deal with elevator overspeed, the mode is usually to decelerate or stop the car through the action of the safety gear and the outside when the elevator is overspeed, but at the moment, the tractor is still in a working state and always presents a traction state to the car, so that certain potential safety hazards exist, and the braking effect of the safety gear is reduced.
Disclosure of Invention
The invention aims to provide an overspeed preventing elevator traction device, which can brake a motor through the triggering of a centrifugal disc so as to stop a traction sheave.
The invention provides an overspeed preventing elevator traction device, which comprises a motor, a brake, a reduction gearbox, a traction sheave and a fixed base, wherein the brake is used for triggering to brake to stop the rotation of the traction sheave when in power failure, the overspeed preventing elevator traction device also comprises a transmission wheel, a centrifugal disc and a safety module, the transmission wheel is used for synchronously rotating with the traction sheave and acquiring the instant rotating speed of the traction sheave, the centrifugal disc is arranged at one end of the transmission wheel and is used for triggering through centrifugal force when the rotating speed of the traction sheave is overspeed, the safety module is used for enabling the motor to be powered off through the transmission of the triggered centrifugal disc, and the safety module is electrically connected with the motor.
Furthermore, the driving wheel is provided with a groove for winding the steel wire rope.
Further, the centrifugal disc comprises a disc body and a cover plate used for covering the disc body.
The centrifugal plate further comprises a cylindrical central block arranged in the center of the plate body and internally provided with a through hole, a centrifugal piece which penetrates through the through hole and can slide in a reciprocating manner through centrifugal force generated by rotation of the plate body, and an elastic piece which is sleeved on one side of the centrifugal piece, wherein one end of the centrifugal piece is fixed on the central block, and the other end of the elastic piece is fixed on the centrifugal piece.
Furthermore, one end of the centrifugal piece is provided with a weighted part used for enabling the centrifugal piece to rapidly slide to one side of the central block under the action of centrifugal force.
Furthermore, the center block is provided with an elastic sheet which is elastic and used for controlling the friction force with the centrifugal piece through the elasticity of the center block, and the elastic sheet is fixed at the top of the through hole.
Furthermore, the top of the central block is also provided with an adjusting knob for adjusting the elasticity of the elastic sheet by changing the deformation of the elastic sheet.
Further, the safety module comprises a switch box for controlling the power supply of the motor to be disconnected or connected and a shift lever for controlling the switch box by shifting the centrifugal piece.
Furthermore, the disk body is provided with an opening for the centrifugal piece to extend out and stir the shifting lever when the traction sheave rotates and exceeds the speed.
Furthermore, the centrifugal piece is further provided with a limiting piece used for limiting the extending position of the centrifugal piece, and the length of the limiting piece is larger than the width of the opening.
According to the overspeed prevention elevator traction device, when an elevator is in overspeed, the centrifugal disc is triggered to enable the safety module to perform power-off operation, the brake electrically connected with the safety module is triggered to finally brake, and then the brake is directly fed back to the traction sheave to realize rapid braking through the overspeed of the elevator; the centrifugal force directly acts on the centrifugal piece, so that the centrifugal piece eccentrically runs and touches the shifting plate, and the brake is triggered; through the outage to the motor, not only make the motor lose power, but also still braked to the driving sheave through the stopper, made the hoisting device not only obtain life's assurance like this, but also avoided the influence to the car after the braking.
Drawings
Fig. 1 is a schematic structural diagram of an overspeed preventing elevator traction device according to an embodiment of the invention;
fig. 2 is a top view of an overspeed preventing elevator traction apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the non-triggered state of the overspeed preventing elevator traction device of the embodiment of the invention;
fig. 4 is a schematic diagram of the triggering state of the overspeed preventing elevator traction device of the embodiment of the invention;
fig. 5 is a schematic diagram of the internal structure of a disc body of an overspeed preventing elevator traction device of an embodiment of the invention;
fig. 6 is a side view of the center block of the traction apparatus of an overspeed preventing elevator according to an embodiment of the present invention.
In the figure: 1-motor, 2-brake, 3-traction wheel, 4-fixed base, 5-driving wheel, 51-groove, 6-centrifugal disk, 61-disk body, 611-opening, 62-cover plate, 63-center block, 631-spring plate, 632-adjusting knob, 633-through hole, 64-centrifugal piece, 641-weighting part, 642-limiting piece, 65-elastic piece, 7-safety module, 71-driving lever and 72-switch box.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort. In addition, the term "orientation" merely indicates a relative positional relationship between the respective members, not an absolute positional relationship.
Please refer to fig. 1 and fig. 2. The overspeed preventing elevator traction device comprises a motor 1, a brake 2, a reduction gearbox, a traction sheave 3 and a fixed base 4, wherein the brake 2 is used for triggering to brake to stop the rotation of the traction sheave 3 when power is off, the overspeed preventing elevator traction device also comprises a transmission wheel 5, a centrifugal disc 6 and a safety module 7, the transmission wheel 5 is arranged on the fixed base 4 and used for synchronously rotating with the traction sheave 3 and acquiring the instant rotating speed of the traction sheave 3, the centrifugal disc 6 is arranged at one end of the transmission wheel 5 and used for triggering the traction sheave 3 through centrifugal force when the rotating speed of the traction sheave 3 is overspeed, the safety module 7 is used for enabling the power of the motor 1 to be off through the transmission of the triggered centrifugal disc 6, and the safety module 7.
The driving wheel 5 is provided with a groove 51 for winding the steel wire rope.
Please refer to fig. 3, 4 and 5. The centrifugal disk 6 comprises a disk body 61 and a cover plate 62 for covering the disk body 61.
The centrifugal plate further comprises a cylindrical central block 63 arranged in the center of the plate body 61 and internally provided with a through hole 633, a centrifugal piece 64 penetrating through the through hole 633 and capable of sliding in a reciprocating manner through centrifugal force generated by rotation of the plate body 61, and an elastic piece 65 which is sleeved on one side of the centrifugal piece 64, one end of the elastic piece is fixed on the central block 63, and the other end of the elastic piece is fixed on the centrifugal piece 64.
The centrifugal member 64 has a weight 641 at one end thereof for allowing the centrifugal member 64 to rapidly slide toward the center block 63 by centrifugal force.
After the centrifugal piece 64 penetrates through the central block 63, the whole centrifugal piece 64 is arranged eccentrically, namely, the length of the extending end on one side of the central block 63 is longer than that of the extending end on the other side, so that the extending end can move outwards under the action of centrifugal force when the disc body 61 rotates. Meanwhile, in order to ensure the smooth sliding of the centrifugal piece 64 in the central block 63, the invention not only carries out extensive treatment on the surface of the centrifugal piece 64 and the inside of the central block 63, but also adds graphite powder as a lubricant.
Please refer to fig. 6. The central block 63 has an elastic piece 631 with elasticity for controlling the friction force with the centrifugal member 64 by the elasticity of the central block, and the elastic piece 631 is fixed on the top of the through hole 633. The top of the central block 63 is further provided with an adjusting knob 632 for adjusting the elastic force of the elastic piece 631 by changing the deformation of the elastic piece 631.
The safety module 7 comprises a switch box 72 for controlling the power supply of the motor 1 to be disconnected or connected and a shift lever 71 for controlling the switch box 72 by shifting the centrifugal member 64.
The disc 61 is provided with an opening 611 for the eccentric 64 to protrude and move the shift lever 71 when the traction sheave 3 rotates at an overspeed.
The centrifugal member 64 is further provided with a limiting member 642 for limiting the extending position of the centrifugal member 64, and the length of the limiting member 642 is greater than the width of the opening 611.
The invention controls the deformation of the spring plate 631 by adjusting the screwing-in and screwing-out of the adjusting knob 632, thereby adjusting different pressures of the spring plate 631 on the centrifugal piece 64, further changing the friction force of the spring plate 631 on the centrifugal piece 64, ensuring that the centrifugal piece 64 can extend out of the opening 611 of the disc body 61 under the action of the centrifugal force generated by the specified rotating speed, and achieving the length of stirring the deflector rod 71.
The elastic member 65 of the present invention is a spring, and because the elastic coefficient of the spring, the elastic force of the elastic sheet 631 and the weight of the weight-added part 641 jointly determine the relationship between the extension length of the centrifugal member 64 and the rotation speed of the centrifugal disc 6, the selection of the spring, the deformation of the elastic sheet 631 and the weight of the weight-added part 641 need to be verified and tested for many times according to the actual design speed requirement of the elevator, so as to ensure that the centrifugal member 64 cannot extend out to toggle the shift lever 71 during the normal operation speed of the elevator; during overrun operation, eccentric 64 must extend toggle lever 71.
The driving wheel 5 and the centrifugal disc 6 of the invention run synchronously, can be integrally welded and also can be detachably fixed by bolts, so that the centrifugal disc 6 can better acquire the instant rotating speed of the driving wheel 5. The driving wheel 5 and the traction sheave 3 of the invention can be synchronously operated and connected through a belt, or the traction sheave 3 and the driving wheel 5 can be directly and sequentially wound through a steel wire rope on the traction sheave 3, so that the driving wheel 5 can better acquire the instant rotating speed of the traction sheave 3, when a traction system is abnormal, the traction sheave 3 runs in an overspeed manner, the driving wheel 5 can immediately acquire the overspeed speed, a centrifugal piece 64 in a centrifugal disc 6 extends out from an opening 611 of a disc body 61 under the action of centrifugal force, the extending part rotates along with the centrifugal disc 6 to directly toggle a shifting lever 71 on a safety module 7 for controlling a switch box 72 to open and close, when the shifting lever 71 is toggled, the switch box 72 is powered off, and as the switch box 72 and the motor 1 are installed in a serial connection manner, the motor 1 is powered off, and a brake 2 is triggered to brake, so that the traction sheave 3 stops running, and the elevator is decelerated or stopped, the brake 2 adopted by the invention is a service brake 2 in the field of elevators.
The working principle of the brake 2 is as follows: when the elevator is in a static state, no current passes through coils of the traction motor 1 and the electromagnetic brake 2, and the brake wheel is tightly held under the action of the pressure of the brake spring due to the fact that attraction force does not exist between electromagnetic cores and the brake shoe, so that the motor is guaranteed not to rotate; when the traction motor 1 is electrified and rotated, the coil in the brake electromagnet is electrified and attracted at the same time, the electromagnetic iron core is quickly magnetized and attracted to drive the brake arm to enable the brake spring to bear acting force, the brake shoe block is opened and completely separated from the brake wheel, and the elevator can run.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. The utility model provides an prevent overspeed elevator draw gear, includes motor (1), stopper (2), reducing gear box, traction sheave (3) and unable adjustment base (4), stopper (2) are used for triggering when motor (1) cuts off the power supply and brake and make traction sheave (3) stall, its characterized in that: the traction mechanism is characterized by further comprising a driving wheel (5) which is arranged on the fixed base (4) and used for synchronously rotating with the traction wheel (3) and obtaining the instant rotating speed of the traction wheel (3), a centrifugal disc (6) which is arranged at one end of the driving wheel (5) and used for being triggered by centrifugal force when the rotating speed of the traction wheel (3) is over-speed, and a safety module (7) which is used for powering off the motor (1) through the transmission of the triggered centrifugal disc (6), wherein the safety module (7) is electrically connected with the motor (1); the centrifugal disc (6) comprises a disc body (61) and a cover plate (62) used for covering the disc body (61), and further comprises a cylindrical central block (63) arranged at the center of the disc body (61) and internally provided with a through hole (633), a centrifugal piece (64) penetrating through the through hole (633) and capable of sliding in a reciprocating manner through centrifugal force generated by rotation of the disc body (61) and an elastic piece (65) sleeved on the centrifugal piece (64) and fixed at one end of one side of the central block (63) and at the other end of the central block (63), the central block (63) is provided with an elastic sheet (631) with elasticity for controlling the friction force with the centrifugal piece (64) through the elasticity of the central block, the elastic sheet (631) is fixed on the top of the through hole (633), and the top of the center block (63) is further provided with an adjusting knob (632) for adjusting the elastic size of the elastic sheet (631) by changing the deformation of the elastic sheet (631).
2. The traction device of an overspeed preventing elevator as set forth in claim 1, wherein: and a groove (51) for winding the steel wire rope is arranged on the driving wheel (5).
3. The traction device of an overspeed preventing elevator as set forth in claim 1, wherein: one end of the centrifugal piece (64) is provided with a weighted part (641) which is used for enabling the centrifugal piece (64) to rapidly slide to one side of the central block (63) under the action of centrifugal force.
4. The traction device of an overspeed preventing elevator as set forth in claim 1, wherein: the safety module (7) comprises a switch box (72) for controlling the power supply of the motor (1) to be disconnected or connected and a driving lever (71) for controlling the switch box (72) through the driving of the centrifugal piece (64).
5. The traction device of an overspeed preventing elevator as set forth in claim 4, wherein: the disc body (61) is provided with an opening (611) for the centrifugal piece (64) to extend out and shift the shift lever (71) when the traction sheave (3) rotates and exceeds the speed.
6. The traction device of an overspeed preventing elevator as set forth in claim 5, wherein: the centrifugal piece (64) is further provided with a limiting piece (642) used for limiting the extending position of the centrifugal piece (64), and the length of the limiting piece (642) is larger than the width of the opening (611).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344295.9A CN109205434B (en) | 2018-11-13 | 2018-11-13 | Overspeed-preventing elevator traction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344295.9A CN109205434B (en) | 2018-11-13 | 2018-11-13 | Overspeed-preventing elevator traction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109205434A CN109205434A (en) | 2019-01-15 |
| CN109205434B true CN109205434B (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811344295.9A Active CN109205434B (en) | 2018-11-13 | 2018-11-13 | Overspeed-preventing elevator traction device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112056801B (en) * | 2020-09-17 | 2022-01-14 | 宁波职业技术学院 | Intelligent lifting cabinet |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514997A (en) * | 2011-12-08 | 2012-06-27 | 安徽丰海起重设备制造有限公司 | Fall-protection safety device of lifter |
| CN202883833U (en) * | 2012-09-13 | 2013-04-17 | 芜湖三六机械有限公司 | Centrifugal overspeed motion device |
| CN106032234B (en) * | 2015-03-18 | 2018-02-27 | 赫仲伟 | One kind automatically resets anti-falling safety device |
| JP6522564B2 (en) * | 2016-08-22 | 2019-05-29 | 株式会社日立製作所 | Governor and test equipment |
| CN206955396U (en) * | 2017-04-25 | 2018-02-02 | 杭州沪宁电梯部件股份有限公司 | Limiter of speed trigger device |
| CN108584603B (en) * | 2018-07-12 | 2019-10-11 | 湖州德玛吉电梯有限公司 | Elevator overspeed protecting device |
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| Publication number | Publication date |
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| CN109205434A (en) | 2019-01-15 |
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