CN111792489A

CN111792489A - Elevator with descending speed limit

Info

Publication number: CN111792489A
Application number: CN201910274730.3A
Authority: CN
Inventors: 郭远军; 郭幸钢; 郭幸铜
Original assignee: Hunan Lingling Hengyuan Power Generation Equipment Co ltd
Current assignee: Hunan Lingling Hengyuan Power Generation Equipment Co ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-10-20

Abstract

The invention discloses an elevator capable of limiting speed to descend, which comprises a car, a traction mechanism, a speed limiting mechanism and a guide mechanism. The traction mechanism is connected with the lift car and provides driving force for the lift car; the speed limiting mechanism is connected with the lift car and prevents the lift car from exceeding a first limit value; and the guide mechanism is arranged between the lift car and the hoistway and used for limiting the movement direction of the lift car. The invention utilizes the speed limiting mechanism to enable the elevator to run in the set speed value, and the overspeed phenomenon can not occur. Utilize third gyro wheel and fourth gyro wheel to carry the deflector, when the car reciprocated, third gyro wheel and fourth gyro wheel were under the drive of deflector, and passive rotation. Causing the rotor blades to also passively rotate, stirring the non-newtonian fluid. And the non-Newtonian fluid does not have too large resistance during low-speed stirring, and when the non-Newtonian fluid is stirred at a high speed, the resistance is rapidly increased, so that the rotating speed of the rotating blade is forced to be reduced, and the rotating speed of the third roller is reduced, thereby playing a role in limiting the speed. Can be widely used in various lifting and conveying occasions.

Description

Elevator with descending speed limit

Technical Field

The invention relates to conveying equipment, in particular to an elevator.

Background

An elevator is a permanent transport device serving a number of specific floors in a building, the cars of which travel in at least two rigid tracks perpendicular to the horizontal or inclined at an angle of less than 15 ° to the vertical. The elevator has its defined moving speed in the process of rising and falling, if exceed the speed operation then can cause the bodily injury, can cause serious personal casualty accident when the elevator stalls and falls, and the elevator generally drives its lift removal by the combination of motor and converter, and the rotational speed of motor can receive frequency and voltage etc. factor and change, when the converter damages, can cause the galloping accident, consequently, needs an elevator that prevents overspeed operation.

In the prior art, a sensor is used for detecting the rotating speed, and when the rotating speed is too high, a controller controls a motor to run at a reduced speed or detects the moving speed of a car through the sensor. However, this technique is not stable enough, and in a severe environment of high temperature and high pressure, components such as sensors, circuits, and controllers are easily damaged and fail, and are also deteriorated with the increase of the use time. And when accidents such as elevator falling occur, the alarm is given by the sensor, and people find that measures are not taken in time.

Therefore, it is important to provide an elevator capable of efficiently and stably preventing overspeed operation.

Disclosure of Invention

In order to solve the above-mentioned problems, an object of the present invention is to provide an elevator capable of preventing a decrease in the speed limit in an overspeed operation.

The embodiment of the invention provides an elevator with a descending speed limit, which comprises:

a car having an accommodation space;

the traction mechanism is connected with the lift car and provides driving force for the lift car;

the speed limiting mechanism is connected with the lift car and prevents the lift car from exceeding a first limit value;

and the guide mechanism is arranged between the lift car and the hoistway and used for limiting the movement direction of the lift car.

Preferably, the guide mechanism includes:

the guide plate is arranged on the inner wall of the shaft along the lifting direction of the lift car;

the first roller is connected with the lift car and arranged on one side of the guide plate;

the second roller is connected with the lift car and arranged on the other side of the guide plate.

Preferably, the speed limiting mechanism includes:

the shell is connected with the car and provided with an accommodating space, and non-Newtonian fluid is hermetically arranged in the accommodating space;

the speed reducing mechanism comprises a rotating sleeve and a rotating blade arranged on the rotating sleeve, and the rotating sleeve is connected with the roller;

the roller mechanism comprises a third roller and a fourth roller, the third roller is connected with the rotating sleeve, and the fourth roller and the third roller are oppositely arranged on two sides of the guide plate;

and the roller pressing mechanism is connected with the rotating shaft of the fourth roller and is used for pressing the fourth roller against the guide plate.

Preferably, the speed limiting mechanism further comprises:

and the adjusting mechanism is connected with the speed reducing mechanism and is used for adjusting the fluid resistance received by the rotating blade during rotation.

Preferably, the roller pressing mechanism includes:

a bracket connected to the housing, the bracket having a cavity to receive a third roller and a fourth roller;

the roller wheel bracket is connected with two ends of the rotating shaft of the fourth roller wheel and clamped on the bracket, so that the fourth roller wheel moves along with the movement of the roller wheel bracket;

and the locking mechanism is fixedly arranged on the bracket, is in locking connection with the roller bracket and is used for locking the position of the roller bracket.

Preferably, the roller pressing mechanism further includes:

the adjusting frame is connected with the roller bracket, and the locking mechanism is connected with the roller bracket through the adjusting frame.

Preferably, the roller pressing mechanism further includes:

and the adjusting frame is connected with the roller bracket through the third elastic piece.

Preferably, be equipped with first tooth's socket on the alignment jig, latched device includes:

the operating handle is rotationally connected to the bracket, a plurality of second tooth grooves for clamping the first tooth grooves are formed in the operating handle, and the adjusting frame is driven to move when the operating handle is rotated;

the locking handle is rotationally connected to the bracket, and a third tooth groove clamped with the first tooth groove is formed in the locking handle and used for clamping the position of the adjusting frame;

and one end of the fourth elastic piece is connected with the locking handle, and the other end of the fourth elastic piece is connected with the bracket and used for providing pulling force between the locking handle and the bracket.

Preferably, the rotating sleeve has an axial through hole and a radial sliding groove, and the adjusting mechanism includes:

the sliding rod is arranged in the rotating sleeve and is used for axially moving relative to the rotating sleeve;

one end of the connecting rod is hinged with the rotating blade, the other end of the connecting rod is hinged with the sliding rod, and the connecting rod drives the rotating blade to move along the radial direction of the sliding groove when swinging;

one end of the first elastic piece is connected with the rotating sleeve, and the other end of the first elastic piece is connected with the sliding rod and used for providing axial pulling force between the rotating sleeve and the sliding rod;

and the operating piece is connected with the sliding rod and the shell and is used for providing pretension for the first elastic piece.

Preferably, the operating member includes:

the screw rod sleeve is sleeved on the sliding rod and can rotate relative to the sliding rod;

the ball nut is matched with the screw rod sleeve and can rotate along with the axial movement of the screw rod sleeve, and the ball nut is provided with a groove.

Preferably, the reduction mechanism further includes:

the first axial limiting mechanism is coaxially arranged between the rotating sleeve and the outer wall of the shell;

and the second axial limiting mechanism is coaxially arranged between the rotating sleeve and the inner wall of the shell.

Preferably, the inner wall of the shell is provided with a friction ring.

Preferably, the elevator further comprises:

and one end of the braking mechanism is connected with the guide mechanism, and the other end of the braking mechanism is connected with the ball nut.

Preferably, the braking mechanism includes:

one end of the output shaft is rotationally connected with the ball nut;

one end of the input shaft is connected with the first roller or the second roller;

and the clutch mechanism is connected with the other end of the output shaft and the other end of the input shaft, and enables the input shaft to be connected with the output shaft when the rotating speed of the input shaft is greater than a second limit value.

Preferably, the clutch mechanism includes:

the first clamping hook is connected with the output shaft;

the second clamping hook is movably arranged on the input shaft, can move radially relative to the input shaft and is clamped with the first clamping hook when moving outwards;

and one end of the fifth elastic piece is connected with the second clamping hook, and the other end of the fifth elastic piece is connected with the input shaft and is used for providing inward elastic force for the second clamping hook.

The invention utilizes the speed limiting mechanism to enable the elevator to run in the set speed value, and the overspeed phenomenon can not occur.

Utilize third gyro wheel and fourth gyro wheel to carry the deflector, when the car reciprocated, just also drove the casing and reciprocated, then third gyro wheel and fourth gyro wheel are under the drive of deflector, and passive rotation. When the third roller is passively rotated, the rotating blade is also passively rotated, and the non-Newtonian fluid is stirred. And the non-Newtonian fluid does not have too large resistance during low-speed stirring, and when the non-Newtonian fluid is stirred at a high speed, the resistance is rapidly increased, so that the rotating speed of the rotating blade is forced to be reduced, and the rotating speed of the third roller is reduced, thereby playing a role in limiting the speed.

And the viscosity of the shear thickening fluid can be well adjusted, so that the shear thickening fluid is suitable for rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

The elevator can be guaranteed to run in a limited speed, the overspeed cannot be caused, and when a frequency converter or a motor breaks down and stalls, the effect of slow landing can be achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIGS. 1 and 2 are perspective views of a preferred embodiment of the present invention, showing two different orientations;

FIGS. 3 and 4 show independently one configuration of the speed limiting mechanism, the guiding mechanism and the braking mechanism;

FIG. 5 illustrates one configuration of the braking mechanism in isolation;

FIG. 6 is a schematic sectional view A-A of FIG. 4;

FIG. 7 is a left side schematic view of the speed limiting mechanism;

FIG. 8 is a perspective view of FIG. 7;

FIG. 9 is a schematic sectional view taken along line A-A of FIG. 7;

FIG. 10 is a schematic sectional view taken along line B-B of FIG. 7;

FIG. 11 is a schematic perspective view of the speed limiting mechanism with portions of the housing and portions of the rotating sleeve cut away, with emphasis on showing the internal retarding mechanism;

fig. 12 is another embodiment of fig. 6.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

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.

It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 12, the present embodiment provides an elevator that limits the descent of a speed, including:

a car 100 having an accommodation space;

a traction mechanism 200 connected to the car 100 to provide a driving force to the car 100;

a speed limiting mechanism 300 connected with the car 100 and preventing the car 100 from exceeding a first limit value;

the guide mechanism 400 is provided between the car 100 and the hoistway 600, and restricts the movement direction of the car 100.

As shown in fig. 1 and 2, the hoisting mechanism 200 is disposed on the top of the car 100 and fixed in the hoistway 600, and the car 100 is driven by the hoisting mechanism 200 to move up and down in the hoistway 600, thereby allowing people and goods to be transported between different floors. The speed limiting mechanism 300 may be disposed at the top or bottom of the car 100 to prevent the car 100 from traveling beyond a first limit, which is a speed value that may be manually set such that the car 100 travels within the first limit. The guide mechanism 400 is disposed outside the car 100 and connected to the hoistway 600 to prevent the car 100 from being randomly shaken when it is lifted.

It can be seen that the speed limiting mechanism 300 of the present embodiment can allow the elevator to operate within the set speed value without causing an overspeed phenomenon.

Wherein, the guiding mechanism 400 can adopt the structure as shown in fig. 3 and fig. 4, and comprises:

a guide plate 440 disposed on an inner wall of the hoistway 600 in a lifting direction of the car 100;

a first roller 410 connected to the car 100 and provided at one side of the guide plate 440;

the second roller 420 is connected to the car 100 and provided at the other side of the guide plate 440.

The first roller 410 and the second roller 420 contact the guide plate 440 and clamp the guide plate 440, and the guide plate 400 is fixed with respect to the hoistway 600, so that the car 100 can only move up and down with respect to the hoistway 600, and cannot swing in a horizontal direction, thereby performing a guiding function.

The speed limiting mechanism 300 may adopt a structure as shown in fig. 7 to 10, and includes:

a housing 310 connected to the car 100 and having an accommodation space in which a non-newtonian fluid is sealingly disposed;

the speed reducing mechanism 330 comprises a rotating sleeve 331 and a rotating blade 334 arranged on the rotating sleeve 331, wherein the rotating sleeve 331 is connected with the roller 351;

the roller mechanism 350 comprises a third roller 351 and a fourth roller 352, the third roller 351 is connected with the rotary sleeve 331, and the fourth roller 352 and the third roller 351 are oppositely arranged on two sides of the guide plate 440;

and a roller pressing mechanism 360 connected to a rotation shaft of the fourth roller 352 for pressing the fourth roller 352 against the guide plate 440.

As shown in fig. 9, the housing 310 may include a first housing 311 and a second housing 312 that are relatively detachable, so that the production and assembly are convenient, and the housing 310 may have a cylindrical shape. Within the housing 310. The non-Newtonian fluid is sealed, and the non-Newtonian fluid refers to a fluid which does not meet the Newtonian viscosity experiment law, namely the fluid with non-linear relation between the shear stress and the shear strain rate. In the present embodiment, it is preferable to use a shear thickening fluid, in which colloidal particles are generally in a densely packed state and are a pasty liquid, and water as a dispersion medium fills gaps between the densely arranged particles. When the applied stress is small and the flow is slow, the viscous resistance exhibited by the colloidal paste is small due to the sliding and flowing action of water. If the ion is stirred with force, the ions in the dense arrangement are disturbed at a stroke to form a porous loose arrangement structure. At this time, since the original water content can no longer fill the gaps between the particles, there is no sliding action of the water layer between the particles, and the viscous resistance increases abruptly, and even the flow property is lost. Because the particles become loosely aligned under strong shear, the apparent volume increases.

The rotating sleeve 331 of the reduction mechanism 330 is rotatably disposed in the housing 310, and rotates relative to the housing 310, and the rotating sleeve 331 may be entirely disposed in the housing 310 or a part thereof may extend out of the housing 310. The number of the rotating blades 334 may be one or more, and is set according to the requirement, and four radially uniform distribution is preferred.

The roller mechanism 350 is disposed outside the housing 310, and includes a third roller 351 and a fourth roller 352, which are disposed on two sides of the guide plate 440. The third roller 351 is connected with the rotating sleeve 331, when the car 100 moves, the third roller 351 is driven to rotate, and when the third roller 351 rotates, the rotating sleeve 331 is driven to rotate, so that the rotating blade 334 is driven to rotate, the non-Newtonian fluid is stirred, and the resistance is generated.

The use method and the working principle of the embodiment are as follows:

the third roller 351 and the fourth roller 352 clamp the guide plate 440, and when the car 100 moves up and down, the housing 310 is driven to move up and down, and then the third roller 351 and the fourth roller 352 are driven to rotate by the guide plate 440. When the third wheel 351 is passively rotated, the rotating blade 334 is also caused to be passively rotated, stirring the non-Newtonian fluid. And the non-Newtonian fluid does not have too large resistance during low-speed stirring, and when the non-Newtonian fluid is stirred at a high speed, the resistance is rapidly increased, so that the rotating speed of the rotating blade 334 is forced to be reduced, and the rotating speed of the third roller 351 is reduced, thereby playing a role in limiting the speed.

It can be seen that this embodiment can guarantee that the elevator is in the operation of limited speed, can not overspeed, when converter or motor break down, when the stall, can play the effect that slowly descends to the speed that this embodiment descends can be adjusted through the protrusion of commentaries on classics leaf 334.

As shown in fig. 9, in order to limit the axial position of the rotating sleeve 331 in the housing 310, the speed reducing mechanism 330 may further include:

a first axial limiting mechanism 335 coaxially arranged between the rotating sleeve 331 and the outer wall of the shell 310;

the second axial limiting mechanism 336 is coaxially disposed between the rotating sleeve 331 and the inner wall of the housing 310.

Referring to fig. 9, the rotating sleeve 331 penetrates the housing 310 at the end of the roller mechanism 350, and the first axial limiting mechanism 335 and the second axial limiting mechanism 336 are respectively disposed at the inner side and the outer side of the housing 310, and are all coaxially disposed on the rotating sleeve 331, so as to respectively limit the left direction and the right direction of the rotating sleeve 331. The rotating sleeve 331 is divided into a small section and a large section, the small section penetrates through the shell 310, the large section is used for connecting the rotating blade 334, a step is formed between the small section and the large section, and the second axial limiting mechanism 336 is just in contact with the step and is arranged between the large section and the inner wall of the shell 310.

The first axial limiting mechanism 335 and the second axial limiting mechanism 336 may be implemented by using a thrust bearing, or implemented by using other rolling elements and rolling grooves. Such as rolling bodies, between the major segments and the inner wall of the housing 310.

Through the arrangement, the axial direction of the rotating sleeve 331 is completely limited, so that the rotating sleeve 331 only can rotate relative to the shell 310 and cannot axially move, and the rotating sleeve 331 is prevented from moving randomly when the rotating sleeve is used.

As a further preferred feature of the present embodiment, in order to adjust the limited rotation speed, that is, to adjust the fluid resistance received by the rotary vane 334 during rotation, an adjusting mechanism 340 may be further included, which is connected to the speed reducing mechanism 330 and is used to adjust the fluid resistance received by the rotary vane 334 during rotation.

Referring to fig. 9, one of the configurations of the adjustment mechanism 340 is illustrated:

the rotating sleeve 331 has an axial through hole and a radial sliding slot, and the rotating blade 334 is disposed in the sliding slot and can move radially with the sliding slot. The adjustment mechanism 340 includes:

the sliding rod 341 is arranged in the rotating sleeve 331 and is used for moving axially relative to the rotating sleeve 331;

one end of the connecting rod 333 is hinged with the rotating blade 334, the other end of the connecting rod 333 is hinged with the sliding rod 341, and when the connecting rod 333 swings, the rotating blade 334 is driven to move along the radial direction of the sliding chute;

one end of the first elastic piece 337 is connected with the rotating sleeve 331, and the other end is connected with the sliding rod 341, and is used for providing axial pulling force between the rotating sleeve 331 and the sliding rod 341;

an operating member, connecting the sliding rod 341 with the housing 310, for providing a pretension to the first elastic member 337.

The first elastic member 337 may be implemented by a tension spring, one end of which is connected to the rotating sleeve 331 and the other end of which is connected to the sliding rod 341, or a protruding ring 346 is disposed on the sliding rod 341 and the other end of the first elastic member 337 is connected to the protruding ring 346. When the speed is not limited, the first elastic member 337 is subjected to a pretension force, that is, the sliding rod 341 is moved toward an end away from the roller mechanism 350, so that the connecting rod 333 swings to retract the rotating blade 334 into the rotating sleeve 331 completely or partially, and the position of the sliding rod 341 is maintained by means of an operating member. At the moment, the invention does not bear any resistance when in work and has the fastest rotating speed. When the speed is limited, the operating member is rotated to adjust the extending length of the rotating blade 334.

The limiting screw 148 can be arranged in the rotating sleeve 331, and the limiting screw 148 is arranged in the rotating sleeve 331, is in threaded fit with the axial through hole of the rotating sleeve 331, and is used for abutting against the axial moving position of the sliding rod 341, namely limiting the extension of the rotating blade 334.

Wherein, the operation member can adopt a structure as shown in fig. 9, comprising:

the screw rod sleeve 342 is sleeved on the sliding rod 341 and can rotate relative to the sliding rod 341;

and a ball nut 343 engaged with the screw housing 342 and rotatable with the axial movement of the screw housing 342, the ball nut 343 having a groove thereon.

Referring to fig. 9, the screw cap 342 passes through the housing 310 at the end away from the roller mechanism 350 and is sealed with the housing 310 by an O-ring, and the inner surface of the screw cap 342 is rounded to be rotatable with respect to the sliding rod 341. The ball nut 343 has a matching outer diameter of the screw housing 342, which is a nut having no self-locking function, and the ball nut 343 can be driven to rotate by the movement of the screw housing 342. When the ball nut 343 is rotated manually, the screw sleeve 342 can be adjusted to move to the left or to the right, so that adjustment is realized. The second elastic member 345 is also implemented as a spring.

As a further preferable aspect of the present embodiment, the roller pressing mechanism 360 includes:

a supporter 361 connected to the housing 310, the supporter 361 having a cavity to receive the third and

fourth rollers

351 and 352;

a roller holder 364 connected to both ends of the rotation shaft of the fourth roller 352 and engaged with the holder 361, so that the fourth roller 352 moves along with the movement of the roller holder 364;

and the locking mechanism is fixedly arranged on the bracket 361, is in locking connection with the roller bracket 364 and is used for locking the position of the roller bracket 364.

As shown in fig. 8, the roller holder 364 is fitted to the holder 361 and can be moved back and forth, and both ends of the rotation shaft of the fourth roller 352 are supported by the roller holder 364, so that the fourth roller 352 can freely roll along its own axis. When the roller holder 364 is closed to the third roller 351, the work is compressed, and the roller holder 364 is locked by the locking mechanism to prevent the roller holder 364 from backing up.

The roller pressing mechanism 360 may further include an adjusting bracket 362 connected to the roller bracket 364, and at this time, the locking mechanism is connected to the roller bracket 364 through the adjusting bracket 362, that is, the adjusting bracket 362 is directly locked, so that the roller bracket 364 is prevented from backing up. As shown in fig. 8, two fourth rollers 352 may be used, and are respectively disposed at two ends of the adjusting frame 362, and the locking mechanism is disposed at a middle position so as to be uniformly stressed.

The roller pressing mechanism 360 may further include a third elastic member 363, and the adjusting frame 362 is connected to the roller bracket 364 through the third elastic member 363, so that the roller bracket 364 bears a non-rigid force, and has a yielding space and an elastic space, which can ensure that the fourth roller 352 can always press the workpiece when the workpiece is not flat. The third elastic member 363 may be implemented by a spring.

The above-mentioned latch mechanism may adopt the structure shown in fig. 8 and 10:

a first tooth slot is provided on the adjusting bracket 362, and the latch mechanism includes:

an operating handle 365 rotatably connected to the bracket 361, wherein the operating handle 365 is provided with a plurality of second tooth grooves for engaging with the first tooth grooves, and the operating handle 365 is rotated to drive the adjusting frame 362 to move;

the locking handle 366 is rotatably connected to the bracket 361, and a third tooth groove for clamping the first tooth groove is formed in the locking handle 366 and is used for clamping the position of the adjusting frame 362;

a fourth elastic member 367 having one end connected to the locking handle 366 and the other end connected to the bracket 361, is used to provide a pulling force between the locking handle 366 and the bracket 361.

The first, second and third tooth grooves are all saw-toothed to form a ratchet structure, and the locking handle 366 has a boss, and under the action of the fourth elastic member 367, the boss contacts with the bracket 361, so that the locking handle 366 is in a relatively fixed state. When the operating handle 365 is rotated counterclockwise as shown in fig. 10, the adjusting bracket 362 can be driven to move inward, i.e., to the left in fig. 10, against the pulling force of the fourth elastic member 367, thereby pressing the work piece. At this time, the locking knob 366 keeps engaging with the adjustment bracket 362 to prevent it from backing up under the pulling force of the fourth elastic member 367. Because the tooth grooves are both sawtooth-shaped, the second tooth groove and the third tooth groove can only clockwise buckle the first tooth groove, and can be separated from the first tooth groove in the anticlockwise direction. Therefore, the operating handle 365 can be operated counterclockwise and clockwise continuously to realize the pressing. When it is desired to release the locking knob 366 counterclockwise by overcoming the elastic force of the fourth elastic member 367, the third spline is disengaged, and the adjustment bracket 362 is in a freely movable state. Wherein the fourth elastic member 367 may also be implemented by a spring.

Wherein, in order to strengthen the deceleration effect, still can be equipped with friction ring 313 at the inner wall of casing 310, when rotating vane 334 stretches out, can rely on the outside border of rotating vane 334, rub this friction ring 313 to further strengthen the deceleration effect, frictional elasticity can be adjusted through stop screw 148, when stop screw 148 was more outwards removed, rotating vane 334 then stretched out more, and is that the friction is more severe.

On the basis of the above-described embodiment, in order to achieve a better safety effect, the elevator may further include a braking mechanism 500 having one end connected to the guide mechanism 400 and the other end connected to the ball nut 343.

The braking mechanism 500 may adopt the structure shown in fig. 3-6, and includes:

an output shaft 510, one end of which is rotatably connected to the ball nut 343;

an input shaft 520 having one end connected to the first roller 410 or the second roller 420;

and a clutch mechanism 530 connecting the other end of the output shaft 510 and the other end of the input shaft 520, for coupling the input shaft 520 with the output shaft 510 when the rotation speed of the input shaft 520 is greater than a second limit value.

As shown in fig. 3, the output shaft 510 may be connected to the ball nut 343 via a pulley and a belt, and when the output shaft 510 rotates, the ball nut 343 is driven to rotate.

The input shaft 520 and the first roller 410 or the second roller 420 rotate according to the rotation of the first roller 410 or the second roller 420. The clutch mechanism 530 is provided between the output shaft 510 and the input shaft 520. The second limit value is based on the first limit value in proportion to which the rotation speed of the input shaft 520 depends on the elevating speed of the car 100.

Specifically, the clutch mechanism 530 may include:

a first hook 531 connected to the output shaft 510;

a second hook 532 movably disposed on the input shaft 520, radially movable relative to the input shaft 520, and engaged with the first hook 531 when moving outward;

a fifth elastic member 533, having one end connected to the second hook 532 and the other end connected to the input shaft 520, for providing an inward elastic force to the second hook 532.

One construction of a clutch 530 is shown in fig. 5 and 6:

the output shaft 510 has a cavity therein, and the first hook 531 is disposed in the cavity. The input shaft 520 also has a cavity therein, and the second hook 532 is movably disposed on the input shaft 520 and can move radially relative to the input shaft 520, i.e. the second hook 532 can extend or retract. One end of the fifth elastic member 533 is connected to the inner wall of the input shaft 520, and the other end is connected to the second hook 532, so as to provide an elastic force to retract the second hook 532 inward. To limit the degree of retraction of the second catch 532, a stop 521 may be provided in the input shaft 520.

The clutch mechanism 530 works as follows:

as shown in fig. 6, when the car 100 descends, the input shaft 520 is driven to rotate clockwise, and during normal operation and when the car does not overspeed, the second hook 532 retracts inward under the action of the fifth elastic member 533, and does not hook the first hook 531, and at this time, the output shaft 510 does not rotate and is in a separated state. When the car 100 falls at a high speed after stalling, the input shaft 520 rotates at a high speed, the centrifugal force generated on the second hook 532 is increased, the pressure of the fifth elastic piece 533 is overcome, the input shaft extends outwards to hook the first hook 531, the output shaft 510 is driven to rotate, the output shaft 510 drives the ball nut 343 to rotate, the sliding rod 341 moves to the maximum value, the rotating blade 334 also extends to the maximum value, the resistance is maximum at the moment, the car 100 is rapidly decelerated or even stopped, after the fault is processed by a worker, the input shaft 520 is rotated reversely, the first hook 531 is separated from the second hook 532, and the car is put into normal operation.

In order to achieve the above effect when the car 100 ascends, the clutch mechanism 530 may have a structure as shown in fig. 12, and the operation principle is the same as above.

It should be noted that, in this document, 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.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. An elevator for limiting the descent of a speed, comprising:

a car (100) having an accommodation space;

the traction mechanism (200) is connected with the car (100) and provides driving force for the car (100);

the speed limiting mechanism (300) is connected with the car (100) and prevents the car (100) from exceeding a first limit value;

and a guide mechanism (400) which is provided between the car (100) and the hoistway (600) and limits the movement direction of the car (100).

2. Elevator according to claim 1, characterized in that the guide means (400) comprise:

a guide plate (440) disposed on an inner wall of the hoistway (600) in a lifting direction of the car (100);

a first roller (410) connected to the car (100) and provided on one side of the guide plate (440);

and a second roller (420) connected to the car (100) and provided on the other side of the guide plate (440).

3. The elevator according to claim 2, characterized in that the speed limiting mechanism (300) comprises:

a housing (310) connected to the car (100) and having an accommodation space in which a non-Newtonian fluid is sealingly disposed;

the speed reducing mechanism (330) comprises a rotating sleeve (331) and a rotating blade (334) arranged on the rotating sleeve (331), and the rotating sleeve (331) is connected with the roller (351);

the roller mechanism (350) comprises a third roller (351) and a fourth roller (352), the third roller (351) is connected with the rotating sleeve (331), and the fourth roller (352) and the third roller (351) are oppositely arranged on two sides of the guide plate (440);

and the roller pressing mechanism (360) is connected with the rotating shaft of the fourth roller (352) and is used for pressing the fourth roller (352) against the guide plate (440).

4. The elevator according to claim 3, characterized in that the speed limiting mechanism (300) further comprises:

and the adjusting mechanism (340) is connected with the speed reducing mechanism (330) and is used for adjusting the fluid resistance received when the rotating blade (334) rotates.

5. Elevator according to claim 3 or 4, characterized in that the roller compacting mechanism (360) comprises:

a cradle (361) connected with the housing (310), the cradle (361) having a cavity that accommodates a third roller (351) and a fourth roller (352);

the roller bracket (364) is connected with two ends of the rotating shaft of the fourth roller (352) and clamped on the bracket (361), so that the fourth roller (352) moves along with the movement of the roller bracket (364);

and the locking mechanism is fixedly arranged on the bracket (361), is in locking connection with the roller bracket (364) and is used for locking the position of the roller bracket (364).

6. The elevator of claim 5, wherein the roller compression mechanism (360) further comprises:

and the adjusting frame (362) is connected with the roller bracket (364), and the latching mechanism is connected with the roller bracket (364) through the adjusting frame (362).

7. The elevator of claim 6, wherein the roller compression mechanism (360) further comprises:

a third elastic member (363), the adjustment frame (362) being connected to the roller bracket (364) by the third elastic member (363).

8. The elevator as claimed in claim 6, wherein the adjustment bracket (362) is provided with a first spline, and the latch mechanism comprises:

the operating handle (365) is rotatably connected to the bracket (361), a plurality of second tooth grooves for clamping the first tooth grooves are formed in the operating handle (365), and the adjusting frame (362) is driven to move when the operating handle (365) is rotated;

the locking handle (366) is rotatably connected to the bracket (361), and a third tooth groove for clamping the first tooth groove is formed in the locking handle (366) and is used for clamping the position of the adjusting frame (362);

a fourth elastic member (367) having one end connected to the locking handle (366) and the other end connected to the bracket (361), for providing a pulling force between the locking handle (366) and the bracket (361).

9. Elevator according to claim 4, characterized in that the rotating sleeve (331) has an axial through hole and a radial slide groove, and the adjusting means (340) comprises:

the sliding rod (341) is arranged in the rotating sleeve (331) and is used for axially moving relative to the rotating sleeve (331);

one end of the connecting rod (333) is hinged with the rotating blade (334), the other end of the connecting rod (333) is hinged with the sliding rod (341), and when the connecting rod (333) swings, the rotating blade (334) is driven to move along the radial direction of the sliding chute;

one end of the first elastic piece (337) is connected with the rotating sleeve (331), and the other end of the first elastic piece is connected with the sliding rod (341) and is used for providing axial pulling force between the rotating sleeve (331) and the sliding rod (341);

an operating member connecting the sliding rod (341) and the housing (310) for providing a pretension to the first elastic member (337).

10. The elevator according to claim 9, wherein the operating member comprises:

the screw rod sleeve (342) is sleeved on the sliding rod (341) and can rotate relative to the sliding rod (341);

and the ball nut (343) is matched with the screw rod sleeve (342) and can rotate along with the axial movement of the screw rod sleeve (342), and the ball nut (343) is provided with a groove.

11. Elevator according to claim 3 or 4, characterized in that the deceleration mechanism (330) further comprises:

the first axial limiting mechanism (335) is coaxially arranged between the rotating sleeve (331) and the outer wall of the shell (310);

and the second axial limiting mechanism (336) is coaxially arranged between the rotating sleeve (331) and the inner wall of the shell (310).

12. Elevator according to claim 3 or 4, characterized in that the inner wall of the housing (310) is provided with a friction ring (313).

13. The elevator according to claim 10, characterized in that it further comprises:

and one end of the braking mechanism (500) is connected with the guide mechanism (400), and the other end of the braking mechanism is connected with the ball nut (343).

14. Elevator according to claim 13, characterized in that the braking mechanism (500) comprises:

an output shaft (510) with one end rotatably connected to the ball nut (343);

an input shaft (520) having one end connected to the first roller (410) or the second roller (420);

and the clutch mechanism (530) is connected with the other end of the output shaft (510) and the other end of the input shaft (520), and enables the input shaft (520) to be connected with the output shaft (510) when the rotating speed of the input shaft (520) is greater than a second limit value.

15. The elevator of claim 14, wherein the clutch mechanism (530) comprises:

a first hook (531) connected to the output shaft (510);

the second hook (532) is movably arranged on the input shaft (520), can move radially relative to the input shaft (520), and is clamped with the first hook (531) when moving outwards;

and a fifth elastic element (533) with one end connected to the second hook (532) and the other end connected to the input shaft (520) for providing an inward elastic force to the second hook (532).