CN212155563U - Hoisting machinery overspeed protection clutch device - Google Patents
Hoisting machinery overspeed protection clutch device Download PDFInfo
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- CN212155563U CN212155563U CN202020981580.8U CN202020981580U CN212155563U CN 212155563 U CN212155563 U CN 212155563U CN 202020981580 U CN202020981580 U CN 202020981580U CN 212155563 U CN212155563 U CN 212155563U
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Abstract
The utility model provides an overspeed protection clutch device of hoisting machinery, which relates to the technical field of safety protection of hoisting machinery, and comprises a driven ratchet wheel rotatably arranged on a supporting end cover; a load mechanism connected to an end of the driven ratchet; the driving wheel hub is fixedly connected with the supporting end cover; is coaxially arranged with the driven ratchet wheel and is connected with the driven ratchet wheelThe driving ratchet wheels can be mutually clamped after being matched and connected; is arranged between the driving ratchet wheel and the driven ratchet wheel and provides pretightening force FdA first spring of (a); arranged between the driving ratchet wheel and the driving wheel hub and capable of applying axial thrust F to the inclined plane of the driving ratchet wheel through centrifugal force in the rotating processtThe centrifugal block of (1); the utility model discloses a full mechanical structure guarantees still can reliably protect when the system loses the electricity, and protection device designs into integrative independent part, links to each other with hoisting mechanism's rotary part, and commonality and adaptability are better, applicable in various hoisting machinery's overspeed protection.
Description
Technical Field
The utility model relates to a hoisting machinery safety protection technical field specifically is a hoisting machinery overspeed protection clutch.
Background
In the running process of potential energy load equipment such as cranes, elevators, stackers and the like, dangerous conditions of overspeed sliding of a hoisting mechanism, such as phase loss of a motor, overweight in hoisting, failure of a brake or out-of-control of an electrical system, can be caused by various abnormal factors.
For example, the related patent documents are as follows: 1. the utility model discloses the name: elevator overspeed protection device, application No. CN108584603A, published (bulletin no): CN108584603A, applicant (patentee): dam Ji Elevator, Huzhou. Utility model (design) people: yangrong root; song feather; the trunk is wound. This patent relates to elevator safety protection technical field, the utility model discloses an elevator overspeed protection device. The device drives the centrifugal box to rotate through the guide wheel, and when the elevator car is overspeed, the locking unit is mechanically triggered by centrifugal force to act on the speed reducing rail so as to reduce or stop the elevator car; the arrangement of the independent guide wheels and the guide rails enables the car to be more stable during braking and deceleration, and the situation that the car shakes due to uneven stress is avoided;
2. the utility model discloses the name: elevator, overspeed protection system and its trigger device, application No. CN201910191770.1, published (bulletin no): CN109775507A, applicant (patentee): hitachi elevator (china) ltd. Utility model (design) people: xiwe; herba Artemisiae Anomalae. This patent relates to elevator safety protection technical field, the utility model discloses an elevator, overspeed protection system and trigger device thereof, trigger device includes: the safety tongs comprise a first transmission piece and an elastic reset piece, wherein one end of the first transmission piece is provided with a trigger piece, the other end of the first transmission piece is in trigger fit with the safety tongs, and one end of the elastic reset piece is connected with the first transmission piece or the trigger piece, so that the trigger piece is attached to the outer wall of the rotating body; when the lift car descends at an overspeed, the triggering part is separated from the rotating body, and the other end of the first transmission part triggers the safety gear to work;
3. the utility model discloses the name: vertical lift full overspeed protection system, application No. CN201910769770.5, published (bulletin no): CN110422720A, applicant (patentee): wuhan city Yunnan bamboo electromechanical new technology development limited company. Utility model (design) people: duckweed; xuxiaojian; king courage; a mammalian macro; song Xiao Yu; the Sun and Wen war; segment forest; a horse language; a left key; next, song; zhengrenjie. The patent relates to the technical field of safety protection of hoisting machinery, and the utility model relates to a vertical lifting whole-course overspeed protection system, which comprises a vertical lifting device, wherein the vertical lifting device comprises a lifting container and a lifting winch for lifting the lifting container, and an anti-collision beam is also arranged right above the lifting container; the system also comprises a steel belt type braking device, a steel rope catching device and a controller, wherein the steel belt type braking device is fixedly arranged on the anti-collision beam, and the lower end of a steel belt of the steel belt type braking device is connected with a braking steel rope; the steel rope catching device is arranged on the lifting container and is used for catching a braking steel rope and is triggered by an electromagnetic switch; the hoisting winch is provided with a speed encoder for measuring the rotating speed of the hoisting winch, the speed encoder is connected with the controller, the controller is also connected with the electromagnetic switch, and the controller is used for controlling the electromagnetic switch according to a speed signal of the speed encoder;
4. the utility model discloses the name: stacker carrier overspeed protection device, application No. CN201910963342.6, published (bulletin no): CN110615380A, applicant (patentee): robertak automation technology (suzhou) ltd. Utility model (design) people: storing in a weekly maintenance mode; wangjiaxing. The patent relates to the technical field of safety protection of a tunnel stacker crane, in particular to an overspeed protection device for a stacker carrier, wherein the overspeed protection device for the stacker carrier is installed on the stacker carrier, the stacker carrier can move up and down along a preset guide rail on a stacker upright post under the traction of a traction rope, the stacker carrier protection device consists of a safety tongs and a safety tongs triggering mechanism, the safety tongs triggering mechanism comprises a pulley traction part and a lever triggering part, and the pulley traction part is movably connected with the lever triggering part; the pulley guide part is connected with a traction rope, the lever trigger part is connected with a safety rope, the safety rope is connected with a speed limiter of the objective table, the pulley traction part is provided with a spring mechanism, and the traction force of the traction rope and the elasticity of the spring structure form balance with the tension of the safety rope transmitted by the lever trigger part;
5. the utility model discloses the name: elevator system, application No. CN201910689626.0, published (bulletin no): CN110872040A, applicant (patentee): tongli shares, Inc. Utility model (design) people: a, Katainan; J.Kantola. This patent relates to the field of elevator safety protection, according to one aspect, there is provided an elevator system comprising an elevator car (202) configured to move in an elevator hoistway (200); a primary safety controller (106) comprising a primary safety output (108) and a secondary safety output (110), wherein the primary safety output (108) is configured to control a machinery brake of the elevator car (202); and a secondary safety circuit (102) connected to the secondary safety output (110) and arranged in the elevator car (202) and comprising at least one safety contact configured to control a stopping device (104) arranged in the elevator car (202); wherein the secondary safety circuit (102) is configured to control the stopping appliance to stop the elevator car (202) when the at least one safety contact is triggered;
6. the utility model discloses the name: hoisting machinery and hoisting mechanism overspeed protection method, device and equipment thereof, application number CN201911049404.9, publication (publication number): CN110963415A, applicant (patentee): sinkiang institute of Engineers. Utility model (design) people: cinnting; aging and flying; leaf viagra; deer sword; wang Yuan; zhang hongxia; the present of normal effect. The patent relates to the technical field of safety protection of hoisting machinery, and discloses an overspeed protection method for a hoisting mechanism of the hoisting machinery, which is applied to the hoisting machinery, and comprises the following steps: acquiring a rotor electric frequency value of a hoisting motor of a hoisting mechanism; judging whether the rotor electric frequency value exceeds a preset overspeed frequency value; the preset overspeed frequency value is the rotor electric frequency value when the descending running speed of the hoisting mechanism is a preset multiple of rated descending running speed; wherein the preset multiple is a safety multiple specified in a safety regulation; if the judgment result is yes, a control coil loop of a main contactor of a main control loop of the hoisting mechanism of the hoisting machine is cut off, so that the hoisting motor is stopped. Therefore, when faults such as overspeed falling occur, the rotor electrical frequency value exceeds the preset overspeed frequency value, and when the rotor electrical frequency value exceeds the preset overspeed frequency value, a control coil loop of a main contactor of a main control loop of the hoisting mechanism is cut off, so that the hoisting motor is stopped to avoid occurrence;
7. the utility model discloses the name: an elevator overspeed protection device, application No. CN201920640454.3, published (bulletin no): CN209974038U, applicant (patentee): hangzhou Yunjin Elevator engineering Co., Ltd. Utility model (design) people: back transport; zhang jin ball. This patent relates to elevator safety protection technical field, the utility model discloses an elevator overspeed protection device. Relates to the technical field of elevator protection equipment. The utility model comprises a bracket and a guide rail, wherein the bracket is a rectangular frame structure, and two opposite side plates of the bracket are correspondingly provided with two groove bodies; the guide rail passes through the two groove bodies; a synchronous frame is arranged in the bracket, and through holes formed on two opposite side plates of the synchronous frame correspond to through holes formed on two opposite side plates of the bracket; a left clamp body is arranged on the left side in the synchronous frame, and a fixed block is fixed on one side of the left clamp body; a right clamp body is arranged on the right side in the synchronous frame, and a movable wedge block is slidably arranged on one side of the right clamp body; the left clamp body and the right clamp body are installed through different bolts which sequentially penetrate through the bracket side plate and the synchronous frame side plate. The utility model limits the moving direction of the left clamp body and the right clamp body through the guide plate, thereby ensuring the reliability in the deceleration process;
8. the utility model discloses the name: an overspeed protection device for a loading platform of a stacker, with application number CN201920713067.8, published (bulletin number): CN210313309U, applicant (patentee): tianhai Oukan scientific and technical information (Xiamen) Co., Ltd. Utility model (design) people: d, brave; zeng rock; carrying out billow. This patent relates to tunnel stacker crane safety protection technical field, the utility model discloses a stacker carries cargo bed overspeed protection device, carries cargo bed and reciprocates and is driven by the steel wire along two parallel stand guide rails, include: the connecting shaft is fixedly connected with the cargo carrying platform through a bearing seat, two ends of the connecting shaft are respectively and fixedly connected with a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are vertical to the connecting shaft; the safety device comprises a first safety gear, a second safety gear, a speed limiter and a speed limiter steel wire rope, wherein the speed limiter can lock the speed limiter steel wire rope when the speed limiter steel wire rope reaches a preset speed. When the goods carrying platform descends in an overspeed manner and reaches the preset speed of the speed limiter, the steel wire rope of the speed limiter stops, so that the connecting rod stops, and the goods carrying platform descends continuously to force the connecting rod to drive the safety gear to move upwards so as to clamp and fix the safety gear on the upright post guide rail.
The technical solutions provided by the above patent documents, as well as other various forms of overspeed protection devices currently appearing, all adopt the following two working principles: one is to measure the speed or rotating speed of the hoisting mechanism through a sensor and realize the overspeed protection function through an electric control system. The scheme has the advantages of simple structure, easy realization and lower cost, but has no effect on overspeed caused by the faults of the motor, the brake, the power supply and the electric control system, and has poorer reliability. The other is to set a mechanical device to sense the descending speed of the lifting load, and to realize emergency braking after overspeed by using a rail clamping device shared with a rope breaking protection device or a single rail clamping device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hoisting machinery overspeed protection clutch, this overspeed protection clutch have compact structure, full mechanical type, modularization, installation and debugging convenience, applicable use with most of hoisting machinery and can be connected characteristics such as the steady fast load of different characteristics as required, can be supplementary each other with disconnected rope protection device's protect function, realize the comprehensive safety protection who falls to rising to play the load to be used for solving the problem mentioned in the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the hoisting machinery overspeed protection clutch device comprises a driven ratchet wheel rotatably mounted on a supporting end cover; a load mechanism connected to an end of the driven ratchet; the driving wheel hub is fixedly connected with the supporting end cover; the driving ratchet wheel is coaxially arranged with the driven ratchet wheel and can be mutually clamped after being matched and connected with the driven ratchet wheel; is arranged between the driving ratchet wheel and the driven ratchet wheel and provides pretightening force FdA first spring of (a); arranged between the driving ratchet wheel and the driving wheel hub and capable of applying axial thrust F to the inclined plane of the driving ratchet wheel through centrifugal force in the rotating processtThe centrifugal block of (1); wherein, when the driving hub is in the normal rotating speed, Fd>FtThe driven ratchet wheel is separated from the driving ratchet wheel, and when the driving hub is in the condition of overspeedd<FtThe driven ratchet wheel is clamped with the driving ratchet wheel.
The utility model has the further technical proposal that the driving ratchet wheel is connected with the central shaft end of the driving hub through a spline, so that the driving ratchet wheel has the capability of moving axially relative to the driving hub while the driving ratchet wheel rotates along with the driving hub.
The technical scheme of the utility model is that the centrifugal block is a steel ball or a steel column, the opposite sides of the driving ratchet wheel and the driving wheel hub are inclined planes to form a groove-shaped cavity, and the cross section of the groove-shaped cavity is in a cone shape with one side facing the axis as a wide end and one side away from the axis as a narrow end.
The further technical proposal of the utility model is that the driving hub is connected with the output shaft of the motor of the hoisting mechanism, the winding drum, the traction wheel or the output shaft of the reducer.
The utility model adopts the further technical proposal that the first spring is a disc spring with small axial size, good dynamic balance and nonlinear characteristic.
The technical proposal of the utility model is that the utility model also comprises an overspeed adjusting device arranged on the driving wheel hub.
The utility model discloses a further technical scheme overspeed adjusting device includes that threaded connection holds the regulation round nut on active wheel hub's center pin, and the center pin of active wheel hub is served the regulation disc that still the activity cup jointed and was adjusted the contact of round nut, adjust the disc with active wheel hub's side is through second spring coupling, the contact is provided with the regulation goods of furniture for display rather than for use on the regulation disc, the centrifugation piece with the inclined plane contact of regulation goods of furniture for display rather than for use, the one end of adjusting the goods of furniture for display rather than for use with the active wheel hub is articulated.
The utility model adopts the further technical proposal that the driven ratchet wheel and the driving ratchet wheel adopt a one-way clamping limiting structure or a two-way clamping limiting structure so as to realize the one-way rotation limiting or the two-way rotation limiting of the driven ratchet wheel to the driving ratchet wheel.
The technical proposal of the utility model is that the driven ratchet wheel is provided with a shaft hole with a key groove, and the shaft hole with the key groove can be matched and connected with a main shaft with a flat key on a load mechanism.
The utility model has the further technical proposal that the device also comprises a sensor for detecting the joint state of the driven ratchet wheel and the driving ratchet wheel or the rotation state of the driven ratchet wheel, and the sensor is electrically connected with the electric control system of the load mechanism and the alarm.
The utility model has the advantages that: the utility model discloses a full mechanical structure guarantees still can reliably protect when the system loses the electricity, and protection device designs into integrative independent part, links to each other with hoisting mechanism's rotary part, and commonality and adaptability are better, and applicable in various hoisting machinery's overspeed protection, can be used to any occasion that needs to carry out overspeed protection to the rotating part even, like aerogenerator, gliding vehicle and amusement facilities etc..
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an overspeed protection clutch apparatus of a hoisting machine.
Fig. 2 is a force analysis diagram of a flyweight in an embodiment of the hoisting machinery overspeed protection clutch device.
Fig. 3 is an overspeed protection characteristic diagram of an exemplary embodiment of a hoisting machine overspeed protection clutching device.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1-3, the overspeed protection clutch device for hoisting machinery comprises a driven ratchet wheel 3 rotatably mounted on a support end cover 2; a load mechanism connected to an end of the driven ratchet 3; a driving wheel hub 6 fixedly connected with the supporting end cover 2; the driving ratchet wheel 5 is coaxially arranged with the driven ratchet wheel 3 and can be mutually clamped after being matched and connected with the driven ratchet wheel 3; is arranged between the driving ratchet wheel 5 and the driven ratchet wheel 3 and provides pretightening force FdThe first spring 4; arranged between the driving ratchet wheel 5 and the driving hub 6 and capable of applying axial thrust F to the inclined surface of the driving ratchet wheel 5 by centrifugal force during rotationtThe centrifugal block 8; wherein, when the driving hub 6 is in the normal rotating speed, Fd>FtThe driven ratchet 3 and the driving ratchet 5 are separated, and F is realized when the driving hub 6 is in the condition of overspeedd<FtThe driven ratchet wheel 3 is clamped with the driving ratchet wheel 5.
In a specific embodiment, the driving ratchet 5 is connected with the central shaft end of the driving hub 6 through a spline, so that the driving ratchet 5 has the capability of moving axially relative to the driving hub 6 while the driving ratchet 5 rotates along with the driving hub 6.
Preferably, in order to meet the requirement of the angle change of the inclined plane, the centrifugal blocks 8 are steel balls or steel column members, the number and the mass of the centrifugal blocks 8 are determined according to the structure and the centrifugal force requirement, the diameter is determined according to the ratchet stroke, the opposite side surfaces of the driving ratchet 5 and the driving hub 6 are inclined planes to form a groove-shaped cavity 61, and the cross section of the groove-shaped cavity 61 is in a conical shape, wherein one side facing the axis is a wide end, and the other side far away from the axis is a narrow end.
Preferably, the driving ratchet wheel 5 and the driven ratchet wheel 3 adopt axial ratchet wheels with compact structure, stable combination and good combination synchronism, and the angle of the ratchet combination surface needs to be designed and calculated according to the requirements of overspeed protection and ratchet wheel combination.
Preferably, the driving hub 6 is connected with an output shaft of a motor of the hoisting mechanism, a winding drum, a traction sheave or an output shaft of a speed reducer.
Preferably, the first spring 4 is a belleville spring with small axial size, good dynamic balance and nonlinear characteristics, parameters of the belleville spring need to be calculated and determined according to a set value of overspeed protection, and if the stroke of the driving ratchet 5 is large, a mode of connecting a plurality of belleville springs in series can be adopted.
Preferably, the driven ratchet wheel 3 is supported on the supporting end cover 2 through a bearing 1, and the supporting end cover 2 is connected with the driving hub 6 through screws.
In a specific embodiment, the centrifugal wheel hub further comprises an overspeed adjusting device arranged on the driving hub 6, the overspeed adjusting device comprises an adjusting round nut 11 in threaded connection with the central shaft end of the driving hub 6, an adjusting disc 9 in contact with the adjusting round nut 11 is further movably sleeved on the central shaft end of the driving hub 6, the adjusting disc 9 is connected with the side surface of the driving hub 6 through a second spring 10, preferably, the second spring 10 is a belleville spring, an adjusting swing part 7 is arranged on the adjusting disc 9 in a contact mode, the centrifugal block 8 is in contact with the inclined surface of the adjusting swing part 7, and one end of the adjusting swing part 7 is hinged to the driving hub 6.
Optionally, the driven ratchet 3 and the driving ratchet 5 adopt a one-way clamping limiting structure or a two-way clamping limiting structure so as to realize the one-way rotation limiting or two-way rotation limiting of the driven ratchet 3 to the driving ratchet 5.
Preferably, the driven ratchet 3 is provided with a shaft hole 31 with a key slot, and the shaft hole 31 with the key slot can be matched and connected with a main shaft with a flat key on the loading mechanism.
In one embodiment, the device further comprises a sensor (not shown) for detecting the clamping state of the driven ratchet 3 and the driving ratchet 5 or the rotating state of the driven ratchet 3, and the sensor is electrically connected with an electric control system of the load mechanism and an alarm; the abnormal state of overspeed can be obtained by the sensor signal, so that the electric control system can realize speed stabilization or brake shutdown protection and can realize alarm. The arrangement of the device does not have adverse effect on the overspeed protection of the device.
The specific working principle is as follows: under the rotation state, the flyweight 8 is subjected to centrifugal force, so that the rotating speed of a motor or a winding drum of the lifting mechanism is converted into the centrifugal force by the steel ball or the steel column-shaped flyweight 8, and axial thrust is generated on the driving ratchet wheel 5 by adjusting the inclined surface of the swing part 7 and is balanced with the pretightening force of the first spring 4; when the speed is over-speed, the force balance is broken, the driving ratchet wheel 5 is connected with the driven ratchet wheel 3 in a clamping mode, and the driven ratchet wheel 3 is connected with a load, so that potential energy is consumed, and the lifting mechanism reaches a stable speed; when the speed returns to normal and reaches a set value, the elastic force of the first spring 4 is greater than the axial thrust generated by centrifugal force, and the driving ratchet wheel 5 is separated from the driven ratchet wheel 3 and returns to a normal working state; the utility model has a thrust adjusting mechanism, which can meet the requirements of different overspeed protection; through the design of relevant parameters, the full-tooth combination of the driving ratchet wheel 5 and the driven ratchet wheel 3 can be ensured, the overspeed protection has the hysteresis characteristic, and the defect of frequent clutching in an overspeed critical area is prevented.
The utility model discloses a key parameter needs carry out the design calculation according to the overspeed protection needs, and key parameter mainly has: the design calculation methods of the flyweight mass, the inclined plane inclination angle, the characteristic parameters of the belleville spring, the moving distance of the driving ratchet wheel, the ratchet tooth inclination angle and the like are specifically described as follows:
from the flyweight force diagram shown in fig. 2, one can derive:
Fl＝Fj2+Fg2＝Fjsinα+Fgsinβ (1)
Fj1＝Fg1
namely: fjcosα＝Fgcosβ (2)
The following formula (1) and (2) can be obtained:
Fl＝Fj2+Fg2＝Fjcosα(tgα+tgβ) (3)
and centrifugal force:
Fl＝mrω2＝Fjcosα(tgα+tgβ) (4)
in the formula, m is the total mass of the flyweight 8, r is the gyration radius of the center of mass of the flyweight, and omega is the angular velocity of the driving hub 6.
The thrust Ft of the driving ratchet 5 by the centrifugal force is equal to Fj1, and therefore it can be obtained from equation (4):
let the initial radius of gyration of the center of mass of the flyweight be r0The precompression amount of the Belleville spring 4 is x0When the flyweight 8 generates radial displacement deltar under the action of centrifugal force, the belleville spring 4 is pushed to be further compressed, and the additional compression amount is deltax. Then:
Δx＝Δr(tgα+tgβ)
equation (5) can be written as:
in the formula
x is the compression of the belleville spring 4.
According to the characteristics of the belleville spring, the thrust F of the driving ratchet 5 is set at a certain angular speed omegatAs a function of x, two curves of fig. 3 can be drawn.
According to fig. 3, the first spring 4 using the belleville spring is selected from a type a or B, and the type C may cause the situation that the rotation is reversed and the recovery is not possible, when the angular velocity reaches the overspeed critical angular velocity ωcrThereafter, the use of a non-linear belleville spring helps to push the force F against the driving ratchet 5tExceeding the pre-tension F of the belleville spring 4d0Then, FtIncrease ratio FdIncrease much faster and ensureThe full tooth length meshing of the ratchet wheel is ensured, and the ratchet wheel is combined quickly.
As can be seen from FIG. 3, in order to protect the clutch from rapid full tooth length engagement during overspeed and to ensure rapid response and reliable operation of the overspeed protection, it is necessary to ensure compliance
The conditions of (1).
When the ratchet wheel is completely engaged due to overspeed, the belleville spring generates additional displacement delta x, the turning radius of the flyweight is increased by delta r, and at the moment, the angular speed of the driving ratchet wheel 5 must be reduced to a separation angular speed omega to separate the ratchet wheelfr. Due to omegafr＜ωcrTherefore, the overspeed protection clutch has hysteresis effect, and can prevent the oscillation condition of frequent clutching when the ratchet wheel is near the overspeed set value. Angular velocity of separation omegafrThe value of (b) can be determined by selecting the H/t value of the belleville spring.
When the flyweight 8 rubs against the inclined surface, ω is also increased by the influence of the friction angle and the direction thereofcrAnd ωfrThe difference in (c) is negligible in design because the friction angle is small and at the same time it is unstable in dynamic operation.
In addition, the hysteresis effect can also be realized by changing the tooth form angle of the ratchet wheel, but the method is influenced by the speed stabilizing load besides the tooth form angle. Therefore, it is not preferable to make the angle larger, but it is preferable to make the angle smaller than 10 ℃. Such as the ratchet tooth bevel of the driving ratchet 5 and the driven ratchet 3 of fig. 1.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A hoisting machinery overspeed protection clutch device is characterized by comprising:
a driven ratchet wheel (3) rotatably mounted on the support end cover (2);
a load mechanism connected to an end of the driven ratchet (3);
a driving wheel hub (6) fixedly connected with the supporting end cover (2);
the driving ratchet wheel (5) is coaxially arranged with the driven ratchet wheel (3) and can be mutually clamped after being matched and connected with the driven ratchet wheel (3);
is arranged between the driving ratchet wheel (5) and the driven ratchet wheel (3) and provides pretightening force FdA first spring (4);
is arranged between the driving ratchet wheel (5) and the driving wheel hub (6) and can apply axial thrust F to the inclined plane of the driving ratchet wheel (5) through centrifugal force in the rotating processtThe centrifugal block (8);
wherein, when the driving hub (6) is in the normal rotating speed, Fd>FtA driven ratchet (3) and a driveThe ratchet wheel (5) is separated, and F is carried out when the driving wheel hub (6) is in the condition of overspeedd<FtThe driven ratchet wheel (3) is clamped with the driving ratchet wheel (5).
2. Hoisting machinery overspeed protection clutch apparatus according to claim 1, characterized in that the driving ratchet (5) is splined to the central shaft end of the driving hub (6) such that the driving ratchet (5) has the ability to move axially relative to the driving hub (6) while the driving ratchet (5) follows the rotation of the driving hub (6).
3. The hoisting machinery overspeed protection clutch apparatus according to claim 1, wherein the centrifugal block (8) is a steel ball or a steel column, and the opposite sides of the driving ratchet (5) and the driving hub (6) are inclined to form a groove-shaped cavity (61), and the cross section of the groove-shaped cavity (61) is in a cone shape with one side facing the axis being a wide end and one side away from the axis being a narrow end.
4. Hoisting machine overspeed protection clutch apparatus according to claim 1, characterized in that the driving hub (6) is connected to the output shaft of the hoisting mechanism's motor, the drum, the traction sheave or the reducer.
5. Hoisting machine overspeed protection clutch apparatus according to claim 1, characterized in that said first spring (4) is a belleville spring.
6. Hoisting machine overspeed protection clutching device of claim 1, further comprising an overspeed governor device provided on the driving hub (6).
7. The hoisting machinery overspeed protection clutch device according to claim 6, characterized in that the overspeed adjustment device comprises an adjustment round nut (11) which is screwed on the central shaft end of the driving hub (6), an adjustment disc (9) which is in contact with the adjustment round nut (11) is movably sleeved on the central shaft end of the driving hub (6), the adjustment disc (9) is connected with the side surface of the driving hub (6) through a second spring (10), an adjustment swing part (7) is arranged on the adjustment disc (9) in a contact manner, the centrifugal block (8) is in contact with the inclined surface of the adjustment swing part (7), and one end of the adjustment swing part (7) is hinged with the driving hub (6).
8. The hoisting machinery overspeed protection clutch apparatus according to any one of claims 1 to 7, characterized in that the driven ratchet wheel (3) and the driving ratchet wheel (5) adopt a one-way clamping limit structure or a two-way clamping limit structure to realize the one-way rotation limit or the two-way rotation limit of the driven ratchet wheel (3) to the driving ratchet wheel (5).
9. Hoisting machine overspeed protection clutch assembly according to any of claims 1 to 7, characterized in that the driven ratchet (3) is provided with a splined shaft hole (31), and the splined shaft hole (31) is fittingly connectable to a flat-keyed main shaft of a load carrying means.
10. Hoisting machine overspeed protection clutching device according to any of claims 1 to 7, characterized by further comprising a sensor for detecting a clutching condition of the driven ratchet (3) and the driving ratchet (5) or for detecting a rotation condition of the driven ratchet (3), the sensor being electrically connected to the electrical control system of the load mechanism and to an alarm.
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| CN202020981580.8U CN212155563U (en) | 2020-06-02 | 2020-06-02 | Hoisting machinery overspeed protection clutch device |
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| CN202020981580.8U CN212155563U (en) | 2020-06-02 | 2020-06-02 | Hoisting machinery overspeed protection clutch device |
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| CN (1) | CN212155563U (en) |
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2020
- 2020-06-02 CN CN202020981580.8U patent/CN212155563U/en active Active
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