CN113908455A - Descent control device - Google Patents

Descent control device Download PDF

Info

Publication number
CN113908455A
CN113908455A CN202111410138.5A CN202111410138A CN113908455A CN 113908455 A CN113908455 A CN 113908455A CN 202111410138 A CN202111410138 A CN 202111410138A CN 113908455 A CN113908455 A CN 113908455A
Authority
CN
China
Prior art keywords
adjusting
shaft
brake
control device
friction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111410138.5A
Other languages
Chinese (zh)
Inventor
涂文兵
张桂源
杨本梦
罗丫
张腾
吴在炎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
East China Jiaotong University
Original Assignee
East China Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by East China Jiaotong University filed Critical East China Jiaotong University
Priority to CN202111410138.5A priority Critical patent/CN113908455A/en
Publication of CN113908455A publication Critical patent/CN113908455A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
    • A62B1/10—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys mechanically operated

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Friction Gearing (AREA)

Abstract

The invention discloses a descent control device which comprises a shell, wherein an installation cavity is formed in the shell; the rope winding mechanism comprises a winding shaft and a rescue rope, and two ends of the winding shaft are rotatably arranged on the inner wall of the mounting cavity; the rescue rope is wound on the winding shaft, and the free end of the rescue rope is led out of the winding shaft and extends out of the mounting cavity; a brake mechanism for providing a resistance force to limit rotational movement of the spool when the spool rotates. The descent control device can perform brake hovering operation when an emergency is encountered in the escape process or a safety area is reached.

Description

Descent control device
Technical Field
The invention relates to the technical field of fire emergency rescue equipment, in particular to a descent control device.
Background
At present, along with the flourishing and development of economy of China, high-rise buildings are also rapidly developed correspondingly in recent years, and meanwhile, the phenomenon of fire in the high-rise buildings is frequent, so that the escape from the high position in the fire becomes the focus of people in the society at present.
The lifesaving descent control device is used as a main component of high-rise fire rescue equipment, and a common descent control device comprises a hook, a hanging strip, a rope and the like, and is a safety rescue device capable of enabling people to slowly descend along the rope. The common descent control device can be arranged at a window of a building, a balcony or a flat top of the building by using a special mounting device to rescue fire escape personnel in a high-rise building. Present fire rescue descent control device has inconvenient scheduling problem of operation, and inside gear drive that adopts, when the in-process flee personnel need change the falling speed of falling down, because the discontinuity of gear drive ratio, its descending speed can appear the shake phenomenon when leading to the descent control device change speed, and the falling speed is difficult to control, the in-process descent control device of using in-process also difficult realization is hovered and functions such as brake, the escaper not only can increase escaper's burden in the in-process of fleing like this, and be unfavorable for the implementation of saving oneself.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a descent control device which can perform a brake hovering operation when an emergency is encountered during escape or a safety area is reached.
The purpose of the invention is realized by adopting the following technical scheme:
a descent control device comprises a descent control device,
a housing formed with a mounting cavity therein;
the rope winding mechanism comprises a winding shaft and a rescue rope, and two ends of the winding shaft are rotatably arranged on the inner wall of the mounting cavity; the rescue rope is wound on the winding shaft, and the free end of the rescue rope is led out of the winding shaft and extends out of the mounting cavity;
a brake mechanism for providing a resistance force to limit rotational movement of the spool when the spool rotates.
Furthermore, the descent control device also comprises a transmission shaft, and the transmission shaft is rotatably arranged in the mounting cavity; one end of the transmission shaft is formed into a transmission end, and the transmission end is in transmission connection with the winding shaft through a gear transmission mechanism.
Furthermore, the brake mechanism comprises a brake support, a brake handle, a brake wheel and two brake holding discs, the brake support is installed outside the shell, the two brake holding discs are arranged on the brake support at intervals, one ends of the brake holding discs are hinged to the brake support, and the other ends of the brake holding discs are hinged to the brake handle through connecting rods; the brake handle is used for driving the two brake discs to approach or separate from each other when the brake handle moves up and down; the brake wheel is arranged on the transmission shaft and is positioned between the two brake holding discs; the two brake holding discs are used for being in friction fit with the brake wheel when the two brake holding discs are close to each other.
Furthermore, the descent control device also comprises an output shaft and a transmission assembly, wherein a driving end is formed on the transmission shaft far away from the transmission end, and a driving disc and a thrust piece are arranged on the driving end; one end of the output shaft is formed into a driven end, the other end of the output shaft is formed into an output end, and the driven end is provided with a driven disc;
the transmission assembly comprises an adjusting frame and at least two adjusting balls, and the at least two adjusting balls are hinged to the circumferential direction of the adjusting frame through a hinge assembly; the at least two adjusting balls are uniformly distributed around the circumference of the central axis of the adjusting frame at intervals; the at least two adjusting balls are clamped between the driving disc and the driven disc; the adjusting frame is coaxially arranged with the driving disc and the driven disc; the adjusting frame is used for moving close to or far away from the driving disc under the action of external force so as to drive the adjusting ball to swing around the axis of the transmission shaft; the thrust piece is used for applying a thrust force to the driving disc so as to enable the driving disc to be pressed on the at least two adjusting balls.
Furthermore, the hinge assembly comprises a hinge shaft and two brackets, and one ends of the two brackets are respectively hinged to two axial ends of the adjusting frame; the hinged shaft penetrates through the adjusting ball, and two ends of the hinged shaft extend out of two ends of the adjusting ball and are respectively hinged to the two brackets; the end part of the bracket is hinged with a roller; the roller is matched with the adjusting frame in a rolling manner.
Furthermore, the transmission assembly further comprises an adjusting shaft, one end of the adjusting shaft is connected to the adjusting frame, and the other end of the adjusting shaft penetrates through the driven disc and penetrates through the output shaft to extend out of the output end; the part of the adjusting shaft extending out of the output end is formed into an adjusting end, and the adjusting end can drive the adjusting shaft to move along the axial direction when being stressed.
Furthermore, the outer surface of the output end is provided with a plurality of friction blocks and friction cylinders, and the friction blocks are fixedly connected to the outer surface of the output end and are circumferentially distributed around the central axis of the output shaft; the friction blocks are used for moving along the radial direction of the output shaft when the output shaft rotates; the friction cylinder is sleeved outside the friction blocks and is in friction fit with the friction blocks when the output end rotates.
Furthermore, a sleeve is sleeved on the outer surface of the output end, and a plurality of friction struts are arranged outside the sleeve; the friction block is provided with an insertion hole; the friction blocks are sleeved outside the sleeve, so that the friction supports are inserted into the insertion holes of the friction blocks.
Furthermore, the thrust piece comprises an installation cylinder and a plurality of elastic sheets, the installation cylinder is sleeved outside the transmission shaft, and one end of each elastic sheet is connected to the end part of the installation cylinder; the other end of the elastic sheet is abutted against the driving disc.
Further, the flexure strip includes first linkage segment and second linkage segment, the one end of first linkage segment connect in an installation section of thick bamboo, the other end of first linkage segment connect in the one end of second linkage segment, the other end of second linkage segment is kept away from first linkage segment slope and with driving-disc butt.
Compared with the prior art, the invention has the beneficial effects that: the descent control device is provided with the brake mechanism, when an escape person encounters an emergency or arrives at a safe area in the escape process, the brake mechanism can provide resistance to limit the rotation movement of the winding shaft when the winding shaft rotates, the operation of braking and hovering is carried out, the operation is simple and convenient, the safety and reliability of the escape process are improved, and the actual operation is convenient and fast.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-1 of FIG. 1;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a schematic structural view of the brake mechanism and the transmission shaft according to the present invention;
FIG. 5 is a schematic view of the output shaft of the present invention;
FIG. 6 is an exploded view of the drive shaft and drive assembly of the present invention;
FIG. 7 is an exploded view of the transmission assembly of the present invention;
FIG. 8 is a partial schematic view of the transmission assembly of the present invention;
FIG. 9 is a schematic view of the transmission assembly of the present invention in one state of its operating principle;
FIG. 10 is a schematic view of another state of the operating principle of the transmission assembly of the present invention;
fig. 11 is a schematic view of another state of the operating principle of the transmission assembly of the present invention.
In the figure: 10. a drive shaft; 11. a drive disc; 121. mounting the cylinder; 122. an elastic sheet; 123. a thrust bearing; 20. an output shaft; 21. a driven plate; 22. a friction block; 221. inserting holes; 23. a friction cylinder; 231. a friction plate; 24. a sleeve; 241. a friction strut; 30. a transmission assembly; 31. an adjusting bracket; 32. adjusting the ball; 33. hinging a shaft; 34. a support; 341. a roller; 35. an adjustment shaft; 351. an external threaded section; 352. operating a hand wheel; 40. a housing; 41. a mounting cavity; 50. a rescue rope; 60. a spool; 61. a bobbin; 70. a gear transmission mechanism; 71. a gear; 72. a gear shaft; 80. a brake mechanism; 81. a brake bracket; 82. a brake wheel; 83. a brake handle; 84. a brake holding disc; 85. a connecting rod.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
in the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
A descent control device as shown in fig. 1-11 comprises a housing 40, a rope winding mechanism and a brake mechanism 80, wherein a mounting cavity 41 is arranged in the housing 40, the rope winding mechanism is mounted in the mounting cavity 41 in the housing 40, and the brake mechanism 80 is mounted outside the housing 40.
The rope winding mechanism comprises a winding shaft 60 and a rescue rope 50, wherein two ends of the winding shaft 60 are rotatably mounted on the inner wall of the mounting cavity 41, the rescue rope 50 is wound on the winding shaft 60, the free end of the rescue rope 50 is led out of the winding shaft 60 and extends out of the mounting cavity 41, in the embodiment, two ends of the winding shaft 60 can be rotatably mounted on the side wall of the mounting cavity 41 through bearings, and the winding shaft 60 can rotate smoothly.
In addition, the brake mechanism 80 may provide a resistance to rotation of the spool 60 to limit the rotational movement of the spool 60.
On the basis of the structure, when the descent control device is used, the winding reel 61 can be arranged outside the winding reel 60, the rescue rope 50 is wound on the winding reel 61, two free ends of the rescue rope 50 can be led out through the shell 40, when the descent control device is used, a person who escapes can hold the rescue rope 50 by hand and can also tie the rescue rope 50 to the person, when the descent control device is used, the rescue rope 50 can drive the winding reel 60 to rotate along with the descent of the person who escapes, and the rescue rope 50 is gradually led out in the rotation process of the winding reel 60.
When the emergency situation is encountered or the safety area is reached in the escape process, the brake mechanism 80 can be operated, the brake mechanism 80 can provide resistance to limit the rotation movement of the winding shaft 60 when the winding shaft 60 rotates, the operation of braking and hovering is carried out, the operation is simple and convenient, the safety and reliability of the escape process are improved, and the actual operation is convenient and fast.
Further, this ware slowly falls still includes transmission shaft 10, with rotatable the installing in the installation cavity 41 of transmission shaft 10, and the one end of transmission shaft 10 forms the transmission end, the transmission end is connected with the transmission of spool 60 through gear drive 70, on this structural basis, in the pivoted in-process of spool 60, spool 60 can pass through gear drive 70 and transmission shaft 10 transmission, gear drive 70 can stabilize the slew velocity of spool 60, prevent that spool 60 slew velocity is too fast or slow, lead to the condition that the person of escaping appears the decline velocity too fast and the shake in the escape in-process, the person of escaping the while appears the decline velocity too slow and can not fall in time and fear.
Further, referring to fig. 4, the brake mechanism 80 in this embodiment includes a brake bracket 81, a brake handle 83, a brake wheel 82 and two brake discs 84, the brake bracket 81 is installed outside the housing 40, the two brake discs 84 are installed on the brake bracket 81 at intervals, one ends of the brake discs 84 are hinged to the brake bracket 81, the other ends of the brake discs 84 are hinged to the brake handle 83 through a connecting rod 85, the brake handle 83 can move up and down under the external force, and the brake handle 83 can drive the two brake discs 84 to approach to each other or move away from each other when moving up and down.
In addition, the brake wheel 82 is mounted on the transmission shaft 10, and the brake wheel 82 is located between the two brake discs 84, and the two brake discs 84 can be in friction fit with the brake wheel 82 when approaching each other.
On the basis of the structure, when assembling, the end part of the transmission end of the transmission shaft 10 can extend out of the shell 40 and is assembled with the brake wheel 82 through splines, and the mounting bracket 34 can be assembled on the shell 40 through a screw structure and the like. When the brake is operated, an escaper can drive the brake handle 83 to move upwards by hands, the brake handle 83 can move upwards to pull the two connecting rods 85, the two brake holding discs 84 can be pulled to rotate close to each other by the two connecting rods 85, and the two brake holding discs 84 can be tightly held on the outer surface of the brake wheel 82 to be in friction fit with the outer surface of the brake wheel 82, so that the brake is realized.
It should be noted that the brake wheel 82 can be implemented by a friction wheel structure in the prior art.
Further, the descent control device further comprises an output shaft 20 and a transmission assembly 30, wherein the transmission shaft 10 is formed as a driving end away from the transmission end, a driving disc 11 and a thrust piece are arranged at the driving end, one end of the output shaft 20 is formed as a driven end, the other end of the output shaft 20 is formed as an output end, and the driven end is provided with a driven disc 21.
In addition, the transmission assembly 30 includes an adjusting bracket 31 and at least two adjusting balls 32, the at least two adjusting balls 32 are hinged to the circumferential direction of the adjusting bracket 31 through a hinge assembly, and the at least two adjusting balls 32 are distributed around the circumference of the central axis of the adjusting bracket 31 at regular intervals, so that the at least two adjusting balls 32 can be distributed uniformly in the circumferential direction of the adjusting bracket 31, and the at least two adjusting balls 32 are clamped between the driving disc 11 and the driven disc 21; the transmission force between the driving disc 11 and the driven disc 21 is made smoother.
The adjusting frame 31 is arranged coaxially with the driving disc 11 and the driven disc 21; the adjusting bracket 31 is used for moving close to or far away from the driving disc 11 under the action of external force so as to drive the adjusting ball 32 to swing around the axis of the transmission shaft 10; the thrust member is used to apply a thrust force to the driving disk 11 to press the driving disk 11 against the at least two adjusting balls 32.
Specifically, the specific operation principle of the transmission assembly 30 is shown in fig. 9, 10 and 11: the driving disk 11 is in spline fit with the driving end of the transmission shaft 10, so that the rotating speed of the transmission shaft 10 and the rotating speed of the driving disk 11 are both omega1(ii) a In addition, the driven disc 21 is connected with the output shaft 20 through a flat key, so that the rotating speeds of the driven disc 21 and the output shaft 20 are both omega2The thrust member can provide the driving disk 11 with a sufficient pressing force F so that no slip occurs between the adjusting balls 32 and the driving disk 11 and the driven disk 21, and since the driving disk 11 rotates simultaneously with the transmission shaft 10, the adjusting balls 32 and the driving disk 21 rotate simultaneouslyThe discs 11 are rotated about the hinge assembly by static friction at a speed omega0。
During normal driving of the transmission assembly 30, see fig. 10, the circumferential radius r of the plane of rotation of the contact point of the adjusting ball 32 and the drive disk 111Radius r of the circumference of the plane of rotation of the contact point of the adjusting ball 32 with the driven disk 212Equal, so that the adjusting balls 32 contact the two contact points O of the driving disk 11 and the driven disk 211，O2All have the linear velocity of omega1Xr, drive speed ω of disc 111With the rotational speed omega of the driven disc 212I.e. equal, the transmission ratio i between the driving disc 11 and the driven disc 21 in the transmission assembly 30 is 1: 1;
when the transmission assembly 30 is under-actuated, referring to fig. 9, the adjusting bracket 31 can be adjusted to drive the adjusting bracket 31 to move close to the driving disc 11, the adjusting bracket 31 deflects to the left by an angle phi, and the contact point O of the adjusting ball 32 and the driving disc 11 is at this moment1Radius r of the circumference of the plane of rotation1Increasing, adjusting the contact point O of the ball 32 with the driven disk 212Radius r of the circumference of the plane of rotation2Reduced, the drive disk 11 drives the adjusting ball 32 to rotate around the hinge axis, the contact point O1Linear velocity of1X R, the rotating speed of the steel ball rotating around the hinge shaft is omega0And ω is0＝ω1×R/r1While the adjusting ball 32 drives the driven disk 21 to rotate, the contact point O2Linear velocity of0×r2At this time, the rotation speed of the output shaft 20 is ω2，And omega2＝(ω0×r2)/R＝((ω1×R/r1)×r2)/R＝ω1×r2/r1Since r1 > r2, ω is2＜ω1The transmission ratio i is ω1/ω2＝r1/r2＞1。
When the transmission assembly 30 is overdriven, referring to fig. 11, the adjusting bracket 31 is driven to move close to the driving disk 11, the adjusting bracket 31 deflects to the right hand by an angle phi, and the contact point O of the adjusting ball 32 and the driving disk 11 is formed1Radius r of the circumference of the plane of rotation1Reduce the contact circumferential radius r between the contact point O2 rotation plane of the adjusting ball 32 and the driven disc 212Increasing, which likewise yields a rotational speed of the output shaft 20 ofω2＝ω1×r2/r1At this time, since r1＜r2Therefore ω is2＞ω1The transmission ratio i is ω1/ω2＝r1/r2＜1。
It should be noted that, since the driving disk 11 and the driven disk 21 can be driven by the plurality of adjusting balls 32 of the driving assembly 30, when the adjusting bracket 31 moves on the axis, the adjusting balls 32 can swing by a certain angle, so that the circumferential radius at the contact point of the adjusting balls 32 and the rotation plane of the driving disk 11 increases or decreases, and the circumferential radius at the contact point of the adjusting balls 32 and the driven disk 21 decreases or increases, thereby realizing the change of the transmission ratio between the driving disk 11 and the driven disk 21, and since the deflection angle of the adjusting bracket 31 is continuously changed, the transmission ratio between the driving disk 11 and the driven disk 21 is also continuously changed, so that the stepless speed change between the driving disk 11 and the driven disk 21 can be realized, and the condition of shaking occurring when the speed is changed under the condition of fixing the transmission ratio is avoided, and the speed change is more gradual.
Since the transmission shaft 10 is in transmission connection with the winding shaft 60 through the gear transmission mechanism 70, the rotation of the transmission shaft 10 can be linked with the rotation of the winding shaft 60, and the rotation speed of the winding shaft 60 is the same as that of the transmission shaft 10.
When the descent control device is used, the descent control device is fixed at a window of a building floor, a balcony or a building flat top through the rescue rope 50, when an escape person needs to take the descent control device for escape, the escape person fixes the position of the lower chest of the arm of the escape person through the hanging strip sleeve, and meanwhile, the holding handle on the shell 40 can be held by two hands to be suspended in the air; under the action of gravity, the bobbin 61 starts to rotate, and the descent control device starts to descend. The winding reel 61 drives the winding reel 60 to rotate, the gear 71 on the winding reel 60 can be meshed with the gear shaft 72 on the transmission shaft 10 for transmission, so as to drive the transmission shaft 10 to rotate, the rotating motion of the transmission shaft 10 drives the output shaft 20 to rotate through the static friction force among the driving disc 11, the adjusting ball 32 and the driven disc 21, and the human body can descend stably.
When an escaper encounters an emergency or arrives at a safe area, the escaper can manually brake by pulling the brake handle 83 on the descent control device, and when the escaper pulls the brake handle 83, the brake disc 84 in the brake mechanism 80 can tightly hold the brake wheel 82 on the transmission shaft 10 to block the transmission shaft 10 from running, so that the descent control device can suspend and brake.
When the escaper needs to slow down or increase the descending speed, the escaper can control the adjusting frame 31 to move left and right, so that the angle of the adjusting ball 32 is continuously changed, the circumferential radius of the rotating plane of the contact point of the adjusting ball 32 and the driving disc 11 and the driven disc 21 is continuously changed, the transmission ratio between the driving disc 11 and the driven disc 21 is further driven to change, the stepless transmission is realized, and the descent control device is very stable when the descending speed is changed.
When the gravity borne by the descent control device reaches balance, the descent control device falls at a constant speed, and the rotating speed of the output shaft 20 is a certain value omega2Assuming the rotation speed of the spool 60 is ωInto(i.e., descent speed), the rotational speed of the propeller shaft 10 is ω1The transmission ratio of the gear shaft 72 on the propeller shaft 10 and the propeller shaft 10 is a constant value i1And i is1< 1, the transmission ratio of the transmission assembly 30 is i, and the rotating speed omega of the transmission shaft 101＝ωIntoI, the rotation speed of the output shaft 20 is omega2＝ω1/i＝ωInto/(i1Xi); when the evacuee needs to increase the descending speed, the adjusting frame 31 is adjusted to move to the left, and the transmission ratio i between the driving disc 11 and the driven disc 21 is continuously increased due to omega2To a constant value, when i increases, ωIntoThe descending speed is increased, and the descending speed of the descent control device is correspondingly increased; when the evacuee needs to reduce the descending speed, the adjusting bracket 31 is adjusted to move to the right, and the transmission ratio i between the driving disc 11 and the driven disc 21 is continuously reduced due to omega2Constant, when i decreases, ωIntoThe descent speed is also reduced, and the descent speed of the descent control device is also reduced correspondingly. Because the transmission ratio of the transmission assembly 30 is continuously changed, when the descending speed is changed, the descending speed of the descent control device is very slowly changed, the phenomenon that the descending speed is jittered and changed is avoided, the psychological burden of escape personnel is relieved, and the running stability of the descent control device is improved.
Further, referring to fig. 6, 7 and 8, the hinge assembly in this embodiment includes a hinge shaft 33 and two brackets 34, one ends of the two brackets 34 are respectively hinged to two axial ends of the adjusting bracket 31, the hinge shaft 33 is penetrated into the adjusting ball 32, and two ends of the hinge shaft 33 extend from two ends of the adjusting ball 32 and are respectively hinged to the two brackets 34.
On the basis of the structure, the adjusting balls 32 can be respectively hinged on the two brackets 34 through the hinge shafts 33, and then the two brackets 34 are hinged on the adjusting frame 31 as a mounting base, so that when the adjusting balls 32 move along the axial direction of the adjusting frame 31, the adjusting balls 32 can drive the hinge shafts 33 to deflect in the axial direction, the circumferential radius of the rotating plane at the contact point of the adjusting balls 32 and the driving disc 11 is increased or decreased, the circumferential radius of the rotating plane at the contact point of the adjusting balls 32 and the driven disc 21 is decreased or increased, the transmission ratio between the driving disc 11 and the driven disc 21 is changed, and the mounting structure of the adjusting balls 32 is relatively stable.
Further, a roller 341 may be hinged to an end of the bracket 34; the roller 341 is in rolling fit with the adjusting frame 31, so that when the adjusting frame 31 moves along the axial direction, the roller 341 can be in rolling fit with the adjusting frame 31, the deflection of the bracket 34 is facilitated, and the deflection is smoother.
Further, the transmission assembly 30 further includes an adjusting shaft 35, one end of the adjusting shaft 35 is connected to the adjusting bracket 31, the other end of the adjusting shaft 35 penetrates through the driven plate 21 and is inserted into the output shaft 20 to extend from the output end, a portion of the adjusting shaft 35 extending from the output end is formed as an adjusting end, and the adjusting end can drive the adjusting shaft 35 to move in the axial direction when being stressed.
When the adjusting frame 31 is adjusted to move axially, the adjusting end can be manually driven by a person, and the adjusting shaft 35 is driven to reciprocate axially, so that manual operation is facilitated.
Specifically, the external thread section 351 may be arranged at the adjusting end, the internal thread section is arranged at the output end, the external thread section 351 and the internal thread section are in thread fit, when the adjusting frame 31 is adjusted to move axially, the adjusting end can be rotated, the external thread section 351 at the adjusting end and the internal thread section are in thread fit, and axial movement can be realized in the rotating process, so that the thread fit can limit the axial movement of the adjusting shaft 35, and only when a human hand rotates, the adjusting shaft can move.
It should be noted that, in this embodiment, in order to facilitate the rotation operation of the adjustment end, an operation hand wheel 352 may be disposed at the adjustment end, and the escaper may operate the hand wheel 352 at a rotating speed to drive the adjustment shaft 35 to rotate, so that the adjustment shaft 35 may move left and right in the axial direction.
Of course, on the basis of the structure without the external thread section 351 and the internal thread section, the adjusting shaft 35 can directly slide in the output shaft 20, can be pushed by a hand to slide when sliding is needed, and can be fixed by an external connecting piece when sliding is not needed.
In addition, the internal thread section arranged at the output end can be formed by a nut structure arranged at the output end.
Further, referring to fig. 5, the outer surface of the output end may be further provided with a plurality of friction blocks 22 and a friction cylinder 23, the plurality of friction blocks 22 are fixedly connected to the outer surface of the output end, and the plurality of friction blocks 22 may be circumferentially distributed around the central axis of the output shaft 20. The plurality of friction blocks 22 are movable in a radial direction of the output shaft 20 when the output shaft 20 rotates, and the friction cylinder 23 is fitted around the plurality of friction blocks 22 and frictionally engages with the friction blocks 22 when the output shaft rotates.
On the basis of the structure, when the speed of the output shaft 20 is too fast, the friction blocks 22 can move outwards along the radial direction of the output shaft 20 under the action of the centrifugal force of the output shaft 20, at the moment, the friction blocks 22 can be in friction contact with the inner wall of the friction cylinder 23, the surface friction of the output shaft 20 is increased, certain resistance is provided for the output shaft 20, the output shaft 20 is further decelerated, the output speed of the output shaft 20 is prevented from being too fast, and therefore the rotating speed is relatively stable.
Specifically, the friction plate 231 may be provided on the inner wall of the friction cylinder 23 to be frictionally engaged with the friction block 22.
Of course, during the initial use, the bobbin 61 starts to rotate under the action of gravity, and the descent control device starts to descend. The bobbin 61 drives the spool 60 to rotate, and the gear 71 on the spool 60 can be meshed with the gear shaft 72 on the transmission shaft 10 for transmission, so as to drive the transmission shaft 10 to rotate. The rotation motion of the transmission shaft 10 drives the output shaft 20 to rotate through the static friction force among the driving disc 11, the adjusting ball 32 and the driven disc 21; when the rotating speed of the output shaft 20 reaches the fixed value ω 2, the friction block 22 on the output shaft 20 contacts with the friction cylinder 23 under the action of centrifugal force to generate friction force, and when the friction force and the self gravity reach balance, the descent control device starts to fall at a constant speed.
Further, the outer surface of the output end is sleeved with a sleeve 24, the sleeve 24 can be fixed on the key groove of the output end through a flat key, and after the sleeve 24 is assembled, nut structures can be arranged at two ends of the sleeve 24 for further fixing.
Specifically, a plurality of friction support columns 241 are arranged outside the sleeve 24, and insertion holes 221 are correspondingly arranged on the friction blocks 22; the friction blocks 22 are sleeved outside the sleeve 24, so that the friction supports 241 are inserted into the insertion holes 221 of the friction blocks 22, and thus, the friction supports 241 can be slidably inserted into the insertion holes 221 of the friction blocks 22, when the output shaft 20 rotates, centrifugal force can drive the friction blocks 22 to move in the radial direction, and the friction supports 241 can slide in the insertion holes 221 to guide the friction blocks 22 to move stably in the radial direction, so that the friction blocks 22 are prevented from being disengaged from the output shaft 20, and the radial movement structure is stable.
Of course, the friction block 22 may be directly connected to the outer surface of the output shaft 20 through an elastic block without the sleeve 24, and the friction block may be spread by centrifugal force and frictionally engaged with the friction cylinder 23.
Further, referring to fig. 4 and 6, the thrust member includes a mounting tube 121 and a plurality of elastic pieces 122, the mounting tube 121 is sleeved outside the transmission shaft 10, one end of each of the elastic pieces 122 is connected to an end of the mounting tube 121, and the other end of each of the elastic pieces 122 abuts against the driving disc 11, when the thrust member is assembled, the mounting tube 121 can be sleeved outside the transmission shaft 10, and the elastic pieces 122 are clamped between the driving disc 11 and the mounting tube 121 in a compressed state, so that the driving disc 11 can be driven to abut against the adjusting balls 32 by the elastic stress provided by the elastic pieces 122, and the adjusting balls 32 abut against the driven disc 21, thereby realizing transmission. In addition, because the elastic stress provided by the elastic piece 122 has flexibility, the transmission structure is more flexible, and the occurrence of the blocking condition in the transmission process is reduced.
Further, thrust spare still includes thrust bearing 123, thrust bearing 123 suit is outside transmission shaft 10 and with installation section of thick bamboo 121 butt, when the assembly, a plurality of flexure strips 122 can be suit between driving-disc 11 and installation section of thick bamboo 121, through thrust bearing 123 and installation section of thick bamboo 121, make flexure strip 122 compressed and produce certain deformation, transmit the certain extrusion force of driving-disc 11, transmission shaft 10 rotates output more nimble, and the thrust that provides is more stable.
More specifically, the elastic piece 122 includes a first connection section and a second connection section, one end of the first connection section is connected to the mounting tube 121, the other end of the first connection section is connected to one end of the second connection section, and the other end of the second connection section is away from the first connection section and inclines and abuts against the driving disc 11, so that the second connection section can be abutted against the driving disc 11 in an inclined state, and the application surface is larger than the application surface of the straight line top pressure, and the applied elastic force is more stable.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.

Claims (10)

1. A descent control device is characterized by comprising,
a housing formed with a mounting cavity therein;
the rope winding mechanism comprises a winding shaft and a rescue rope, and two ends of the winding shaft are rotatably arranged on the inner wall of the mounting cavity; the rescue rope is wound on the winding shaft, and the free end of the rescue rope is led out of the winding shaft and extends out of the mounting cavity;
a brake mechanism for providing a resistance force to limit rotational movement of the spool when the spool rotates.
2. The descent control device of claim 1, further comprising a drive shaft rotatably mounted within the mounting chamber; one end of the transmission shaft is formed into a transmission end, and the transmission end is in transmission connection with the winding shaft through a gear transmission mechanism.
3. The descent control device according to claim 2, wherein the brake mechanism comprises a brake bracket, a brake handle, a brake wheel and two brake discs, the brake bracket is mounted outside the housing, the two brake discs are arranged on the brake bracket at intervals, one ends of the brake discs are hinged to the brake bracket, and the other ends of the brake discs are hinged to the brake handle through a connecting rod; the brake handle is used for driving the two brake discs to approach or separate from each other when the brake handle moves up and down; the brake wheel is arranged on the transmission shaft and is positioned between the two brake holding discs; the two brake holding discs are used for being in friction fit with the brake wheel when the two brake holding discs are close to each other.
4. The descent control device of claim 2, further comprising an output shaft and a drive assembly, the drive shaft distal from the drive end being formed as a drive end, the drive end being provided with a drive disc and a thrust member; one end of the output shaft is formed into a driven end, the other end of the output shaft is formed into an output end, and the driven end is provided with a driven disc;
the transmission assembly comprises an adjusting frame and at least two adjusting balls, and the at least two adjusting balls are hinged to the circumferential direction of the adjusting frame through a hinge assembly; the at least two adjusting balls are uniformly distributed around the circumference of the central axis of the adjusting frame at intervals; the at least two adjusting balls are clamped between the driving disc and the driven disc; the adjusting frame is coaxially arranged with the driving disc and the driven disc; the adjusting frame is used for moving close to or far away from the driving disc under the action of external force so as to drive the adjusting ball to swing around the axis of the transmission shaft; the thrust piece is used for applying a thrust force to the driving disc so as to enable the driving disc to be pressed on the at least two adjusting balls.
5. The descent control device according to claim 4, wherein the hinge assembly comprises a hinge shaft and two brackets, one ends of the two brackets are respectively hinged to two axial ends of the adjusting bracket; the hinged shaft penetrates through the adjusting ball, and two ends of the hinged shaft extend out of two ends of the adjusting ball and are respectively hinged to the two brackets; the end part of the bracket is hinged with a roller; the roller is matched with the adjusting frame in a rolling manner.
6. The descent control device according to claim 4, wherein the transmission assembly further comprises an adjusting shaft, one end of the adjusting shaft is connected to the adjusting bracket, and the other end of the adjusting shaft passes through the driven disc and is disposed through the output shaft to extend from the output end; the part of the adjusting shaft extending out of the output end is formed into an adjusting end, and the adjusting end can drive the adjusting shaft to move along the axial direction when being stressed.
7. The descent control device according to claim 4, wherein the outer surface of the output end is provided with a plurality of friction blocks and a friction cylinder, and the plurality of friction blocks are fixedly connected to the outer surface of the output end and circumferentially distributed around the central axis of the output shaft; the friction blocks are used for moving along the radial direction of the output shaft when the output shaft rotates; the friction cylinder is sleeved outside the friction blocks and is in friction fit with the friction blocks when the output end rotates.
8. The descent control device of claim 7, wherein a sleeve is sleeved over an outer surface of the output end, the sleeve having a plurality of friction struts disposed thereon; the friction block is provided with an insertion hole; the friction blocks are sleeved outside the sleeve, so that the friction supports are inserted into the insertion holes of the friction blocks.
9. The descent control device according to any one of claims 4 to 8, wherein the thrust member comprises a mounting cylinder and a plurality of elastic pieces, the mounting cylinder is sleeved outside the transmission shaft, and one ends of the plurality of elastic pieces are connected to the end of the mounting cylinder; the other end of the elastic sheet is abutted against the driving disc.
10. The descent control device according to claim 9, wherein the resilient tab comprises a first connecting section and a second connecting section, one end of the first connecting section is connected to the mounting cylinder, the other end of the first connecting section is connected to one end of the second connecting section, and the other end of the second connecting section is inclined away from the first connecting section and abuts against the driving disc.
CN202111410138.5A 2021-11-25 2021-11-25 Descent control device Pending CN113908455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111410138.5A CN113908455A (en) 2021-11-25 2021-11-25 Descent control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111410138.5A CN113908455A (en) 2021-11-25 2021-11-25 Descent control device

Publications (1)

Publication Number Publication Date
CN113908455A true CN113908455A (en) 2022-01-11

Family

ID=79248045

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111410138.5A Pending CN113908455A (en) 2021-11-25 2021-11-25 Descent control device

Country Status (1)

Country Link
CN (1) CN113908455A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114849093A (en) * 2022-06-02 2022-08-05 杭州合泰安防科技有限公司 Rescue descent control device with manual and electric double adjustment functions
CN114849092A (en) * 2022-06-02 2022-08-05 杭州合泰安防科技有限公司 Electric-adjusting descent control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114849093A (en) * 2022-06-02 2022-08-05 杭州合泰安防科技有限公司 Rescue descent control device with manual and electric double adjustment functions
CN114849092A (en) * 2022-06-02 2022-08-05 杭州合泰安防科技有限公司 Electric-adjusting descent control device

Similar Documents

Publication Publication Date Title
CN113908455A (en) Descent control device
JPH06212867A (en) Roll blind with controllable cord
US4602699A (en) Fire escape with cable reel brake
CN216798522U (en) Descent control device
JP2637268B2 (en) Screen lifting device for continuous roll blind
TW202216245A (en) Fall-protection apparatus comprising dual-actuatable braking device
CN108853766B (en) Reverse lifting lifter
KR100985144B1 (en) Winding Apparatus For Roll Screen
JPH07324572A (en) Slat lifting device for lateral blind
CN103041519A (en) Fixed self-adaptive elastic force firefighting escape slow-descending system
CN103100152A (en) Self-adaption elasticity continuous and slow descent fire protection escaping device
CN101791455B (en) Lifesaving device
CN208611616U (en) A kind of high building earthquake escape fire emergency safe escape device
US10864387B2 (en) Tactical rope insertion assist device
CN214762927U (en) High-rise escape device
CN112972921B (en) High-rise escape device
CN102526902A (en) High-altitude escape self-rescue device
CN213285413U (en) Single-use escape backpack
CN2468510Y (en) Centrifugal and friction type device for rescuing from fire from high building
CN112245821A (en) Cable descending device and cable descending method
CN203154629U (en) Self-adaptation elastic force fire protection escape descent control device
CN213285414U (en) Improved escape backpack
CN221014217U (en) Safety emergency escape device
CN114558255B (en) Family fire control lifesaving window
CN220137808U (en) Safe escape exercise auxiliary device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination