CN112340634B - Additional brake and escalator or moving sidewalk - Google Patents

Additional brake and escalator or moving sidewalk Download PDF

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Publication number
CN112340634B
CN112340634B CN201910724442.3A CN201910724442A CN112340634B CN 112340634 B CN112340634 B CN 112340634B CN 201910724442 A CN201910724442 A CN 201910724442A CN 112340634 B CN112340634 B CN 112340634B
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China
Prior art keywords
rotating shaft
main
connecting rod
rod
escalator
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CN201910724442.3A
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CN112340634A (en
Inventor
沈宗
唐峰
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Shanghai Mitsubishi Elevator Co Ltd
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Shanghai Mitsubishi Elevator Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B21/00—Kinds or types of escalators or moving walkways
    • B66B21/10—Moving walkways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Escalators And Moving Walkways (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses an additional brake, wherein the relative positions of a driving mechanism, a main rotating shaft, the rear end of an elastic element and the axis of a brake disc are fixed; the main connecting rod is pivoted and fixed around the main rotating shaft; the motion rod is fixed at the front end of the elastic element; the front end of the moving rod is hinged with the head end of the main connecting rod; the tail end of the main connecting rod is connected with a friction plate; when the driving mechanism is not controlled by the motion rod, the elastic element is in a release state, so that the motion rod moves forwards to drive the friction plate at the tail end of the main connecting rod to apply pressure to the brake disc; when the driving mechanism controls the motion rod, the motion rod can move backwards, the elastic element is compressed and deformed backwards, the friction plate connected with the tail end of the main connecting rod is driven to be far away from the brake disc, and the pressure applied to the brake disc by the friction plate is reduced. The invention also discloses an escalator or a moving pavement comprising the additional brake. The invention has higher safety, compact structure, convenient expansion, strong applicability, convenient adjustment of braking force and good field maintainability.

Description

Additional brake and escalator or moving sidewalk
Technical Field
The invention relates to the technology of escalators or moving walkways, in particular to an additional brake and an escalator or a moving walkway with the additional brake.
Background
The escalator or moving sidewalk is a fixed electric driving device with circulating running steps or pedals for up-and-down or horizontal passenger conveying, has the characteristics of continuous work and large transportation volume, and is widely applied to public places with large passenger flow, such as subways, stations, markets and the like.
Escalators are stationary electric drives with cyclically moving steps for transporting passengers upwards or downwards. The escalator consists of a ladder way (a modified slat conveyor) and handrails (a modified belt conveyor) on both sides. The main components of the device comprise steps, a traction chain and a chain wheel, a guide rail system, a main transmission system (comprising a motor, a speed reducer, a brake, an intermediate transmission link and the like), a driving main shaft, a ladder way tensioning device, a handrail system, a comb plate, a ladder truss, an electrical system and the like. The stairs move horizontally at the entrance of the passenger (the passengers can conveniently climb the stairs), and then the stairs are gradually formed; the steps gradually disappear near the outlet, and the steps move horizontally again. The movements are realized by the steps of the main wheels and the auxiliary wheels respectively walking along different step guide rails.
Moving walk refers to a stationary electric drive with a circulating walkway for transporting passengers at horizontal or inclined angles of no more than 12 °. The structure is similar to an escalator and mainly comprises a movable tread and a handrail. Usually, the movable tread is not stepped even in the case of inclination. The passenger can be classified into a pedal type moving sidewalk (the tread on which the passenger stands is a moving sidewalk with a plate block with tooth grooves on the surface and made of metal or other materials, similar to a plate conveyor) and a rubber belt type moving sidewalk (the tread on which the passenger stands is a moving sidewalk with a continuous steel belt with a rubber layer on the surface, similar to a belt conveyor) according to the structural forms.
According to the requirements of GB 16899-2011 safety code for manufacturing and installing escalators and moving sidewalks on additional brakes, the additional brakes should effectively decelerate and stop escalators and moving sidewalks with braking load running downwards and keep the escalator and moving sidewalks in a static state, and the deceleration should not exceed 1m/s 2 。
The existing additional brakes are basically in a ratchet wheel and pawl structure, when the additional brakes act, pawls clamp tooth grooves or stop blocks on ratchet wheels under the action of a brake driver, so that the ratchet wheels arranged on a driving main shaft cannot synchronously rotate along with the driving main shaft to be braked, step (pedal) chain wheels or driving wheels, brake pressure plates and the ratchet wheels relatively move under the action of inertia of an escalator or an automatic sidewalk and passenger load, and the escalator or the automatic sidewalk decelerates until the escalator or the automatic sidewalk stops running under the action of brake friction torque. The additional brake with the structure has poor applicability, for escalators or moving sidewalks with different lifting heights and braking loads, the braking friction torque between a step (pedal) chain wheel or driving wheel, a braking pressure plate and a ratchet wheel needs to be preset according to needs, the set value needs to be larger than the braking load equivalent torque under the full-load working condition of the escalators or moving sidewalks, so that the effective braking of the escalators or moving sidewalks can be ensured, and the braking friction torque can not change after being debugged; the deceleration should not exceed 1m/s because of the need for additional brake actuation 2 The standard requirement of (2) is that the braking friction torque is required to be high in precision during setting and needs to be controlled in a small range, so that the additional brake can be effectively braked and braked when actingThe deceleration meets the standard requirement, and the technical level requirement on installation and adjustment personnel is high.
When the additional brake acts and emergently stops the escalator or the moving sidewalk, the ratchet wheel is instantly clamped by the pawl, the braking friction torque is a large static friction torque preset according to the specification of the escalator or the moving sidewalk, the ratchet wheel relatively rotates relative to the driving main shaft during braking of the additional brake, the static friction torque is converted into a dynamic friction torque, and the braking friction torque can generate huge impact in the conversion process of the static friction torque and the dynamic friction torque, so that the instantaneous value of the braking deceleration of the escalator or the moving sidewalk is violently changed, the steps of the escalator or the pedals of the moving sidewalk are shaken, and passengers on the steps (pedals) are easy to fall down due to standing.
Disclosure of Invention
The invention aims to solve the technical problems that the additional brake has higher safety, compact structure, convenient expansion, strong applicability, convenient adjustment of braking force and good field maintainability.
In order to solve the technical problem, the invention provides an additional brake, which comprises a driving mechanism, a motion rod, an elastic element, a main rotating shaft, a main connecting rod, a brake disc and a friction plate;
the relative positions of the driving mechanism, the main rotating shaft, the rear end of the elastic element and the axis of the brake disc are fixed;
the main connecting rod is pivoted and fixed around the main rotating shaft;
the motion rod is fixed at the front end of the elastic element;
the front end of the motion rod is hinged to the head end of the main connecting rod;
the tail end of the main connecting rod is connected with a friction plate;
the driving mechanism is used for driving the moving rod to move back and forth;
when the driving mechanism is not controlled by the motion rod, the elastic element is in a release state, and the elastic element enables the motion rod to move forwards to drive the friction plate at the tail end of the main connecting rod to be attached to the brake disc and apply pressure to the brake disc;
when the driving mechanism controls the motion rod, the motion rod can move backwards, the elastic element is compressed and deformed backwards, the friction plate connected with the tail end of the main connecting rod is driven to be far away from the brake disc, and the pressure applied to the brake disc by the friction plate is reduced.
Preferably, the driving mechanism is a hydraulic device, a pneumatic device or an electromagnet device.
Preferably, the driving mechanism is an electromagnet device;
when the electromagnet device is not powered on, the electromagnet device does not control the motion rod, and the elastic element is in a release state;
when the electromagnet device is powered on, electromagnetic force for moving the motion rod backwards can be generated.
Preferably, the tail end of the main connecting rod is pivotally connected with the middle part of the second connecting rod through a first rotating shaft;
the tail end of the second connecting rod is pivotally connected with the first friction plate through a second rotating shaft;
the head end of the second connecting rod is pivotally connected with the front end of the third connecting rod through a third rotating shaft;
the relative position of the fourth rotating shaft and the main rotating shaft is fixed;
a fourth link middle portion is pivotally fixed to the fourth rotating shaft;
the head end of the fourth connecting rod is pivotally connected with the rear end of the third connecting rod through a fifth rotating shaft;
the tail end of the fourth connecting rod is pivotally connected with the second friction plate through a sixth rotating shaft.
Preferably, the axes of the main rotating shaft, the first rotating shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all in the front-back direction;
the distance from the main rotating shaft to the first rotating shaft along the left-right direction is less than 1/2 of the distance from the main rotating shaft to the hinged point of the front end of the moving rod and the head end of the main connecting rod along the left-right direction.
Preferably, the distance from the main rotating shaft to the first rotating shaft along the left-right direction is 1/6-1/3 of the distance from the main rotating shaft along the left-right direction to the hinged point of the front end of the motion rod and the head end of the main connecting rod.
Preferably, the friction plate is made of sintered alloy or sintered ceramic.
The invention discloses an escalator or a moving sidewalk comprising the additional brake, wherein a brake disc is fixedly connected with a driving main shaft of the escalator or the moving sidewalk and coaxially rotates along with the driving main shaft;
the driving mechanism, the main rotating shaft and the fourth rotating shaft are fixed on a truss of the escalator or the moving sidewalk.
Preferably, the escalator or moving walkway is provided with a plurality of additional brakes.
Preferably, the brake disc is arranged outside the step chain wheels at two ends of the escalator driving main shaft or outside the pedal chain wheels at two ends of the moving pavement driving main shaft.
Preferably, the brake disc is arranged between step chain wheels at two ends of the escalator driving main shaft or between pedal chain wheels at two ends of the moving pavement driving main shaft.
According to the additional brake, when the driving mechanism is not controlled by the motion rod, the elastic element is in a release state, and the elastic element can provide braking force through the friction plate; when the driving mechanism controls the motion rod, the control motion rod can move backwards, the braking friction torque can be controlled to be gradually increased from zero in the braking process, the impact can be reduced on the premise of effective braking, and the brake device is high in safety, compact in structure, convenient to expand and strong in applicability. The embodiment I of the additional brake is characterized in that the elastic element provides braking force, the elastic force of the elastic element is adjusted, the braking force can be conveniently adjusted, and the field maintainability is good.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of the escalator or moving walkway of the present invention;
fig. 2 is a schematic structural view of another embodiment of the escalator or moving walkway of the present invention;
FIG. 3 is a schematic illustration of an embodiment of the supplemental brake of the present invention in a non-braking state;
fig. 4 is a schematic view of a braking state of an embodiment of the additional brake of the present invention.
Description of the reference numerals
1 a driving mechanism; 2, a motion rod; 30 a main rotating shaft; 31 a first shaft; 32 a second rotating shaft; 33 a third rotating shaft; 34 a fourth rotating shaft; 35 a fifth rotating shaft; 36 a sixth rotating shaft; 40 a main link; 42 a second link; 43 a third link; 44 a fourth link; 5, a brake disc; 71 a first friction plate; 72 a second friction plate; 6 driving the main shaft; 61 sprocket wheel.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 3 and 4, the additional brake includes a driving mechanism 1, a motion bar 2, an elastic element, a main rotating shaft 30, a main connecting rod 40, a brake disk 5, friction plates 71,72;
the relative positions of the driving mechanism 1, the main rotating shaft 30, the rear end of the elastic element and the axis of the brake disc 5 are fixed;
the main connecting rod 40 is fixed around the main rotating shaft 30 in a pivoting way;
the motion rod 2 is fixed at the front end of the elastic element;
the front end of the motion rod 2 is hinged to the head end of the main connecting rod 40;
the tail end of the main connecting rod 40 is connected with friction plates 71 and 72;
the driving mechanism 1 is used for driving the moving rod 2 to move back and forth;
when the driving mechanism 1 does not control the motion rod 2, the elastic element is in a release state, the elastic element enables the motion rod 2 to move forward, and the friction plates 71 and 72 at the tail end of the main connecting rod 40 are driven to be attached to the brake disc 5 and apply pressure to the brake disc 5;
when the driving mechanism 1 controls the motion rod 2, the motion rod 2 can move backwards, and the elastic element is compressed and deformed backwards, so as to drive the friction plates 71 and 72 connected with the tail end of the main connecting rod 40 to be far away from the brake disc, and reduce the pressure applied to the brake disc 5 by the friction plates 71 and 72.
Preferably, the driving mechanism may be a hydraulic device, a pneumatic device, an electromagnet device, or the like.
In the additional brake of the first embodiment, when the driving mechanism 1 does not control the motion rod, the elastic element is in a release state, and the elastic element can provide braking force through the friction plates 71 and 72; when the driving mechanism 1 controls the motion rod, the control motion rod can move backwards, the braking friction torque can be controlled to be gradually increased from zero in the braking process, the impact can be reduced on the premise of effective braking, and the brake device is high in safety, compact in structure, convenient to expand and strong in applicability. The embodiment I of the additional brake is characterized in that the elastic element provides braking force, the elastic force of the elastic element is adjusted, the braking force can be conveniently adjusted, and the field maintainability is good.
Example two
Based on the additional brake of the first embodiment, the driving mechanism 1 is an electromagnet device;
when the electromagnet device is not powered on, the moving rod 2 is not controlled, and the elastic element is in a release state;
when the electromagnet device is powered on, it can generate electromagnetic force to make the moving rod 2 move backwards.
In the additional brake of the second embodiment, the elastic element can provide braking force through the friction plates 71 and 72 when in the release state, and the magnitude of the braking force can be controlled by controlling the current of the electromagnet device.
EXAMPLE III
According to the additional brake of the first embodiment, the tail end of the main link 40 is pivotally connected to the middle part of the second link 42 through the first rotating shaft 31;
the tail end of the second connecting rod 42 is pivotally connected with the first friction plate 71 through the second rotating shaft 32;
the head end of the second connecting rod 42 is pivotally connected with the front end of the third connecting rod 43 through the third rotating shaft 33;
the relative position of the fourth rotating shaft 34 and the main rotating shaft 30 is fixed;
the middle part of the fourth link 44 is pivotally fixed to the fourth rotating shaft 34;
the head end of the fourth connecting rod 44 is pivotally connected to the rear end of the third connecting rod 43 through the fifth rotating shaft 35;
the tail end of the fourth link 44 is pivotally connected to the second friction plate 72 via the sixth rotating shaft 36.
Preferably, the friction plates 71,72 are sintered alloy or sintered ceramic. Preferably, the friction plates 71,72 are made of sintered alloy, so that the friction coefficient between the mating parts is stable, excellent wear resistance can be obtained, and the friction plates are low in cost and high in economical efficiency.
In the additional brake of the third embodiment, when the driving mechanism 1 drives the motion rod 2 to move backward, the head end of the main link 40 moves backward along with the motion rod 2, the main link 40 rotates around the main rotating shaft 30, the tail end of the main link 40 moves forward, the second link 42 moves forward synchronously along with the first rotating shaft 31, at this time, the third link 43 is driven to move forward synchronously, the head end of the fourth link 44 moves forward and rotates around the fourth rotating shaft 34, and the tail end of the fourth link 44 moves backward; while the first friction plate 71 moves forward with the second link 42 and the second friction plate 72 moves backward with the trailing end of the fourth link 44, the first friction plate 71 and the second friction plate 72 move away from each other, and the pressing force (clamping force) applied to the brake disk 5 decreases (or becomes 0).
When the driving mechanism 1 does not control the moving rod 2, the elastic element is in a release state, the elastic element enables the moving rod 2 to move forward, the moving rod 2 is ejected forward, the main connecting rod 40 rotates around the main rotating shaft 30, the tail end of the main connecting rod 40 moves backward, the second connecting rod 42 moves backward synchronously with the first rotating shaft 31, at this time, the third connecting rod 43 is driven to move backward synchronously, the head end of the fourth connecting rod 44 moves backward and rotates around the fourth rotating shaft 34, and the tail end of the fourth connecting rod 44 moves forward; while the first friction plate 71 moves backward along with the second link 42, the second friction plate 72 moves forward along with the trailing end of the fourth link 44, the first friction plate 71 and the second friction plate 72 approach each other, and the pressing force (clamping force) applied to the brake disk 5 increases.
The additional brake of the third embodiment adopts a multi-connecting-rod structure to reduce the volume, and has compact structure and strong expansion capability.
Example four
Based on the additional brake of the third embodiment, the axes of the main rotating shaft 30, the first rotating shaft 31, the second rotating shaft 32, the third rotating shaft 33 and the fourth rotating shaft 34 are all in the front-back direction;
the distance from the main rotating shaft 30 to the first rotating shaft 31 along the left-right direction is less than 1/2 (for example, 1/6 to 1/3) of the distance from the main rotating shaft 30 to the hinge point between the front end of the motion bar 2 and the head end of the main link 40 along the left-right direction.
The additional brake of the fourth embodiment increases the braking force output by the motion rod 2 according to a fixed proportion, and transmits the increased braking force to the friction plates 71 and 72; meanwhile, the displacement output by the motion rod 2 is reduced according to a fixed proportion and is transmitted to the friction plates 71 and 72; the increasing proportion of the braking force is the same as the decreasing proportion of the displacement, and the braking force and the displacement transmitted by the friction plates 71 and 72 on both sides of the brake disc 5 are nearly the same; during braking, braking force and displacement are transmitted to the friction plates 71 and 72, the friction plates 71 and 72 simultaneously press the brake disc 5 to generate braking friction torque, the braking friction torque is gradually increased, and the escalator or the moving sidewalk decelerates under the combined action of the braking friction torque and inertia until braking; if the driving mechanism 1 controls the moving rod 2 to apply a driving force in a direction opposite to the elastic force of the elastic element, the elastic force is partially or completely counteracted, when the driving force is greater than the elastic force, the moving rod moves backwards, the backward displacement of the moving rod is transmitted to the friction plates 71 and 72, the friction plates 71 and 72 are separated from the brake disc 5 and no longer generate friction force with the brake disc, and the escalator or moving walkway can normally run. The additional brake of the fourth embodiment enables the braking force and the displacement to reach a more optimal balance, can reduce the volume of the additional brake, and simultaneously can enable the friction plate to be completely separated from the brake disc and not to be contacted and rubbed with the brake disc when the escalator or the moving sidewalk runs normally.
EXAMPLE five
An escalator or moving walkway including the additional brake of embodiment one, two or three;
the brake disc 5 is fixedly connected with a driving main shaft 6 of the escalator or the moving sidewalk and rotates coaxially with the driving main shaft 6;
the driving mechanism 1, the main rotating shaft 30 and the fourth rotating shaft 34 are fixed on a truss of the escalator or the moving pavement.
Preferably, the escalator or moving walkway is provided with a plurality of additional brakes. When the braking friction torque required by the escalator or the moving pavement is large, the total braking friction torque is shared by the plurality of additional brakes, so that the whole structure is more compact.
In the escalator or moving walk according to the fifth embodiment, when the elastic member is in the released state, the additional brake performs braking control on the escalator or moving walk. The additional brake is divided into two states of no control or control. If the brake is in an uncontrolled state, the driving mechanism 1 does not control the motion rod 2, the elastic element is in a release state, and the braking force provided by the elastic element is transmitted to completely act on the brake disc 5 through the friction plates 71 and 72; when the control state is reached, the driving mechanism 1 can drive the motion rod 2 to counteract the elastic force of all or part of the elastic element to move back and forth. When the escalator or moving walk normally operates, the driving mechanism 1 drives the moving rod 2 to move backwards, and the pressure (clamping force) applied to the brake disc 5 by the first friction plate 71 and the second friction plate 72 is reduced (or changed into 0); when the escalator or moving sidewalk is stopped suddenly, the driving mechanism 1 can reduce the backward force applied to the moving rod 2, the elastic force of the elastic element can drive the moving rod 2 to move forward, the first friction plate 71 and the second friction plate 72 are driven to approach, the pressure (clamping force) applied to the brake disc 5 is increased, and the additional brake brakes the escalator or moving sidewalk.
In the escalator or moving walk of the fifth embodiment, the driving mechanism 1 can drive the moving rod 2 to move gradually, so that the braking friction torque is increased gradually from zero, impact can be reduced on the premise of effective braking, the braking process of the escalator or moving walk is more stable, the risk that a passenger falls down due to violent shaking of steps during emergency braking is avoided, and the safety is higher.
EXAMPLE six
According to the escalator or moving walkway of the fifth embodiment, as shown in fig. 1, the brake disc 5 is disposed outside the step sprockets 61 at both ends of the escalator drive spindle 6 or outside the step sprockets 61 at both ends of the moving walkway drive spindle.
The step or the pedal of the additional brake of the sixth embodiment can not shield the brake disc 5, and the brake disc is easy to access and convenient for daily inspection and maintenance.
EXAMPLE seven
According to the escalator or moving walkway of the fifth embodiment, as shown in fig. 2, the brake disc 5 is disposed between the step sprockets at both ends of the escalator drive spindle or between the step sprockets at both ends of the moving walkway drive spindle.
The seventh additional brake, the brake disc 5, is between the passenger carrying step/step and the return step/step of the escalator or moving sidewalk, does not need to occupy additional machine room space, has higher utilization rate of internal space, and needs to remove part of the steps or steps during daily inspection and maintenance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (11)

1. An additional brake is characterized by comprising a driving mechanism (1), a motion rod (2), an elastic element, a main rotating shaft (30), a main connecting rod (40), a brake disc (5) and friction plates (71, 72);
the driving mechanism (1), the main rotating shaft (30), the rear end of the elastic element and the axis of the brake disc (5) are fixed in relative positions;
the main connecting rod (40) is pivoted and fixed around the main rotating shaft (30);
the motion rod (2) is fixed at the front end of the elastic element;
the front end of the motion rod (2) is hinged with the head end of the main connecting rod (40);
the tail end of the main connecting rod (40) is connected with friction plates (71, 72);
the driving mechanism (1) is used for driving the moving rod (2) to move back and forth;
when the driving mechanism (1) does not control the motion rod (2), the elastic element is in a release state, the elastic element enables the motion rod (2) to move forwards, and the friction plates (71 and 72) at the tail end of the main connecting rod (40) are driven to be attached to the brake disc (5) and apply pressure to the brake disc (5);
when the driving mechanism (1) controls the motion rod (2), the motion rod (2) can move backwards, the elastic element is compressed and deformed backwards, the friction plates (71 and 72) connected with the tail end of the main connecting rod (40) are driven to be far away from the brake disc, and the pressure applied to the brake disc (5) by the friction plates (71 and 72) is reduced.
2. Additional brake according to claim 1,
the driving mechanism (1) is a hydraulic device, a pneumatic device or an electromagnet device.
3. Additional brake according to claim 1,
the driving mechanism (1) is an electromagnet device;
when the electromagnet device is not electrified, the moving rod (2) is not controlled, and the elastic element is in a release state;
when the electromagnet device is powered on, the electromagnet device can generate electromagnetic force which enables the moving rod (2) to move backwards.
4. Additional brake according to claim 1,
the tail end of the main connecting rod (40) is pivotally connected with the middle part of the second connecting rod (42) through a first rotating shaft (31);
the tail end of the second connecting rod (42) is pivotally connected with the first friction plate (71) through a second rotating shaft (32);
the head end of the second connecting rod (42) is pivotally connected with the front end of a third connecting rod (43) through a third rotating shaft (33);
the relative position of the fourth rotating shaft (34) and the main rotating shaft (30) is fixed;
a fourth link (44) is pivotally secured at its mid-portion to the fourth shaft (34);
the head end of the fourth connecting rod (44) is pivotally connected with the rear end of the third connecting rod (43) through a fifth rotating shaft (35);
the tail end of the fourth connecting rod (44) is pivotally connected with a second friction plate (72) through a sixth rotating shaft (36).
5. The additional brake of claim 4,
the axes of the main rotating shaft (30), the first rotating shaft (31), the second rotating shaft (32), the third rotating shaft (33) and the fourth rotating shaft (34) are all in the front-back direction;
the distance from the main rotating shaft (30) to the first rotating shaft (31) along the left-right direction is less than 1/2 of the distance from the main rotating shaft (30) to the hinge point between the front end of the motion rod (2) and the head end of the main connecting rod (40) along the left-right direction.
6. Additional brake according to claim 5,
the distance from the main rotating shaft (30) to the first rotating shaft (31) along the left-right direction is 1/6-1/3 of the distance from the main rotating shaft (30) along the left-right direction to the hinged point of the front end of the motion rod (2) and the head end of the main connecting rod (40).
7. Additional brake according to claim 1,
the friction plates (71, 72) are sintered alloy or sintered ceramic.
8. Escalator or moving walkway comprising an additional brake according to any of claims 4 to 7, characterized in that the brake disc (5) is fixedly connected to the escalator or moving walkway drive spindle (6) and rotates coaxially with the drive spindle (6);
the driving mechanism (1), the main rotating shaft (30) and the fourth rotating shaft (34) are fixed on a truss of the escalator or the moving pavement.
9. Escalator or moving walkway according to claim 8,
the escalator or moving walkway is provided with a number of additional brakes.
10. Escalator or moving walkway according to claim 8,
the brake disc (5) is arranged on the outer side of step chain wheels at two ends of a driving main shaft (6) of the escalator or on the outer side of pedal chain wheels at two ends of the driving main shaft of the moving pavement.
11. Escalator or moving walkway according to claim 8,
the brake disc (5) is arranged between step chain wheels at two ends of a driving main shaft of the escalator or between step chain wheels at two ends of the driving main shaft of the moving pavement.
CN201910724442.3A 2019-08-07 2019-08-07 Additional brake and escalator or moving sidewalk Active CN112340634B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910724442.3A CN112340634B (en) 2019-08-07 2019-08-07 Additional brake and escalator or moving sidewalk

Applications Claiming Priority (1)

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CN201910724442.3A CN112340634B (en) 2019-08-07 2019-08-07 Additional brake and escalator or moving sidewalk

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US4875558A (en) * 1989-03-16 1989-10-24 Otis Elevator Company Safety brake for escalators
CN201961947U (en) * 2011-02-28 2011-09-07 沈阳博林特电梯股份有限公司 Progressive additional brake of escalator
US9162848B2 (en) * 2013-02-08 2015-10-20 Carlos M. Ascua Vacuum brake
CN104276505B (en) * 2014-09-17 2016-08-24 广州广日电梯工业有限公司 The additional brake of self-regulation braking distance and comprise escalator or the moving sidewalk of this additional brake
CN205895975U (en) * 2016-07-20 2017-01-18 大连华锐重工集团股份有限公司 Stopper for tipper
CN206257187U (en) * 2016-11-23 2017-06-16 山东科大机电科技股份有限公司 A kind of pincer structure disk brake of weight-driven

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