A high-rise escape backpack with controllable descent speed

Abstract

The invention discloses a high-rise escape backpack with controllable descent speed, which relates to the technical field of escape backpacks and solves the technical defect that the existing escape backpacks cannot control the descent speed. The technical scheme comprises: a backpack body and a descender, the descender comprises a fixing frame, a central axis, a winding wheel, a planetary gear mechanism and a friction damping mechanism. The beneficial effects of the invention are: the friction damping mechanism comprises a passive centrifugal deceleration mechanism and an active air brake deceleration mechanism, the active air brake deceleration mechanism comprises a first brake assembly, a second brake assembly and a pneumatic brake control assembly, the brake assembly comprises a brake chamber, a brake wheel disc, a brake push rod, a limiting base, a driving gear disc, a driving rack and a brake cylinder, the pneumatic brake control assembly controls the brake cylinder to push the driving rack to rotate the driving gear disc, and drives the brake push rod to clamp the brake wheel disc through an arc-shaped driving groove to increase the friction damping of the descender, thereby controlling the descent speed. The structure is simple, reliable and easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of escape backpacks, and more particularly to a high-rise escape backpack capable of adjusting damping magnitude according to actual needs during use to control a slow descent speed. Background Art

[0002] As people's awareness of safety precautions increases, residents living on higher floors usually equip their homes with high-rise escape backpacks. Such high-rise escape backpacks have a retarder fixed in the cavity. The basic mechanism of most retarders includes a fixed frame, in which a winding wheel is rotatably connected through a central axis, and a steel wire rope is wound on the winding wheel to drive the winding wheel to rotate. The tail end of the steel wire rope is fixed on the winding wheel, and the head end of the steel wire rope is provided with a safety hook that extends out of the escape backpack through the upper end of the fixed frame and is hung on a fixed anchor point indoors. The retarder is also provided with a planetary gear mechanism for driving the central axis to rotate in the opposite direction relative to the winding wheel during the rotation of the winding wheel, and a friction damping mechanism that slides against the cylindrical inner wall of the winding wheel driven by the central axis to reduce its rotation speed.

[0003] The friction damping size that the friction damping mechanism can provide for the descender in the vast majority of existing escape backpacks is based on the gravity size of the user, and the gravity of the user is constant during the descending escape process, and the friction damping size that the friction damping mechanism can provide is also certain. The user cannot adjust the damping size of the descender according to actual use needs, so it is impossible to manually adjust, control the descending speed or control the hovering during use, and the use process is uncontrolled. Moreover, this type of descender has certain requirements for the weight range of the user. If the weight is too light, the descending speed will be too slow, affecting the escape efficiency. If the weight is too large, the descending speed will be too fast, causing panic or discomfort to the user. In particular, some people who are seriously overweight cannot use the existing descender to descend and escape, and the applicability is poor.

[0004] In summary, the existing high-rise escape backpack has an unreasonable structural design, the damping size during use cannot be adjusted, the descent speed cannot be controlled, the user's weight is highly restricted, and the applicability is low, which needs to be improved. Summary of the invention

[0005] In summary, the purpose of the present invention is to solve the technical deficiencies of the existing escape backpacks, such as unreasonable structural design, unadjustable damping size, uncontrollable descent speed, and low applicability, and to provide a high-rise escape backpack that can adjust the damping size at any time according to actual needs during use, thereby controlling the descent speed, and is suitable for people of different weights.

[0006] In order to solve the technical deficiencies proposed by the present invention, the technical solution adopted is:

[0007] A high-rise escape backpack with controllable descent speed comprises a backpack body, a descent control device is fixedly arranged in a cavity of the backpack body, a winding wheel is rotatably connected to a fixing frame of the descent control device via a central axis, a steel wire rope is arranged on the winding wheel, a head end of the steel wire rope extending out of the backpack body is provided with a safety hook hung on a fixed anchor point indoors, a planetary gear mechanism for driving the central axis to rotate in the opposite direction during the rotation of the winding wheel, and a friction damping mechanism for hindering the rotation of the winding wheel to allow the steel wire rope to be slowly released outwards is arranged on the descent control device. The friction damping mechanism includes a passive centrifugal deceleration mechanism and an active air brake deceleration mechanism. The active air brake deceleration mechanism includes a first brake assembly and a second brake assembly correspondingly arranged on both sides of a fixed frame, and a pneumatic brake control assembly. The first brake assembly and the second brake assembly both include a brake chamber, a brake disc, a brake push rod, a limiting base, a driving gear disc, a driving rack and a brake cylinder. The brake chamber is fixedly connected to the outer wall of the fixed frame, and the central axis is rotatably connected between the centers of the two end faces of the brake chamber. The brake disc is fixedly sleeved on one end of the central axis and is located in the brake chamber. The limiting base surrounds the outside of the brake disc and is fixedly connected to the end face of the brake chamber, and is radially evenly distributed with a plurality of guide grooves connected to the brake disc. The brake push rod is movably connected in the guide groove, and the driving gear disc is rotatably connected in the brake chamber. The end face of the corresponding limiting base is evenly distributed with arc driving grooves equal in number to the brake push rod, and the brake push rod is provided with a connecting column corresponding to the arc driving groove. A notch is provided on the annular outer wall of the brake compartment, the driving rack is slidably connected to the outer wall of the fixed frame and meshes with the driving gear plate through the notch, the brake cylinder is fixedly connected to the outer wall of the fixed frame, and its piston rod is axially connected to the driving rack. When the pneumatic brake control assembly drives the brake cylinder to push the driving rack, the driving gear plate rotates and drives the brake push rod to radially clamp the brake wheel disc along the guide groove through the arc-shaped driving groove to hinder the rotation of the winding wheel disc through the central axis and the planetary gear mechanism.

[0008] Specifically, the pneumatic brake control component includes a 24V power supply, a meter control controller, a two-way solenoid valve, a miniature gas storage bottle and a button switch. The 24V power supply is connected to the meter control controller, the output end of the meter control controller is connected to the input end of the two-way solenoid valve, the miniature gas storage bottle is connected to the air inlet of the two-way solenoid valve through an air duct, and its air outlet is connected to the brake cylinder through an air duct, and the button switch is connected to the input end of the meter control controller.

[0009] Specifically, the button switch includes a power switch and a control switch. When the power switch is pressed, the 24V power supply supplies power or cuts off power to the pneumatic brake control component. When the control switch is continuously pressed, the two-way solenoid valve remains powered on so that the piston rod of the brake cylinder continues to push the drive rack, thereby gradually increasing the friction damping between the brake push rod and the brake wheel disc.

[0010] Furthermore, the micro gas storage bottle is provided with a pressure display gauge for displaying the internal air pressure thereof, and the cavity of the backpack body is provided with at least one spare micro gas storage bottle.

[0011] Preferably, the 24V power supply is a polymer lithium-ion rechargeable battery, which is provided with a power indicator light for displaying its power level.

[0012] Preferably, at least three guide grooves are provided on each of the limiting bases.

[0013] Furthermore, a sliding sleeve is rotatably provided on the connecting column and is movable in the arc-shaped driving groove.

[0014] Specifically, the planetary gear mechanism includes a gear ring fixedly connected to the winding wheel, a sun gear located at the center of the gear ring is fixedly provided on the central shaft, and three planetary gears are rotatably connected to the fixed frame, which are respectively meshed between the sun gear and the gear ring, and transmit the torque of the gear ring to the sun gear to drive the central shaft to rotate in the opposite direction relative to the winding wheel when the winding wheel rotates.

[0015] Specifically, the passive centrifugal reduction mechanism includes a fixed slide rod vertically inserted on the central axis, with both ends extending to the inner wall of the winding wheel disc, and both ends of the fixed slide rod are slidably connected to a friction block. Between each of the friction blocks and the central axis, there is a set of friction block return springs provided on the fixed slide rod for driving the friction block to elastically abut against the inner wall of the winding wheel disc to provide friction damping.

[0016] Furthermore, a smoke alarm is also provided on the backpack body, and the smoke alarm has an Internet of Things communication module and a GPS positioning module built in. The Internet of Things communication module is wirelessly connected to the user's smart terminal to send smoke detection data and positioning detection data to the user.

[0017] The beneficial effects of the present invention are as follows: the friction damping mechanism not only includes a passive centrifugal deceleration mechanism, but also includes an active air brake deceleration mechanism, with various deceleration modes, and higher safety and reliability for slow descent escape. When used by a person with a lighter weight, he can rely only on the friction damping provided by the passive centrifugal deceleration mechanism for slow descent escape, and when used by a person with a heavier weight, he can start the active air brake deceleration mechanism on the basis of the friction damping provided by the passive centrifugal deceleration mechanism to provide greater friction damping, thereby achieving the purpose of adjusting the size of the friction damping during use, and being suitable for use by people of different weights. In addition, the user can also adjust the slow descent speed at any time through the active air brake deceleration mechanism to reduce panic, or can also actively control the hovering through the active air brake deceleration mechanism for fixed-point rappelling, which is convenient for use, so that the present invention can be used for slow descent escape and high-altitude slow descent rescue, expanding the scope of use of the present invention.

[0018] At the same time, the active air brake deceleration mechanism of the present invention includes a first brake assembly and a second brake assembly correspondingly arranged on both sides of the fixed frame, which can provide a relatively balanced braking force for the central axis during the slow descent process, prevent damage caused by uneven local force on the central axis, and increase the service life of the central axis. At the same time, the uniform braking force can also ensure that the slow descent process is more stable. Moreover, the correspondingly arranged first brake assembly and second brake assembly also play a double insurance role. In actual use, even if one of the brake assemblies fails, another brake assembly will still work, further improving the safety and reliability of slow descent escape.

[0019] Moreover, the driving rack of the present invention drives the driving gear plate meshed with it to rotate under the drive of the brake cylinder. During the rotation of the driving gear plate, the brake ram is driven by the arc-shaped driving groove and the connecting column to radially clamp the brake wheel plate to provide additional friction damping to hinder the rotation of the central axis. The structure is simple, the space is small, and the overall structural size of the descending device can be reduced and its weight can be reduced. Moreover, the use of the brake cylinder as a power source to drive the driving gear plate to rotate has a faster response speed compared to the traditional hydraulic power source, a simpler structure, convenient use and maintenance, higher reliability, and a longer service life. Moreover, compared with the hydraulic power source, the active air brake type deceleration mechanism used in the present invention can be safely used in high-temperature fire scenes, further improving the safety and reliability of the present invention. In addition, the brake cylinder is driven by the high-pressure gas in the micro gas storage bottle. Since the compressed gas has a certain buffering characteristic, it can play a certain buffering effect compared to the hydraulic power source, which reduces the load borne by the brake cylinder to a certain extent, reduces the wear of the driving rack and the driving gear plate, and improves its service life.

[0020] Moreover, the pneumatic brake control assembly of the present invention is controlled by a meter controller, which does not require the professional skill level of the user. Ordinary people can use or maintain it without professional training, and the use cost is low and the reliability is high. At the same time, the miniature gas cylinder 58 is small in size, light in weight, easy to carry, contains many types of gases, is easy to buy, and has a low price. At the same time, the user can grasp the gas pressure in the miniature gas cylinder at any time by observing the pressure display meter on it, and can replace the spare miniature gas cylinder at any time when the pressure is insufficient. In addition, the user can also grasp the power level of the 24V power supply by observing the power indicator light on the polymer lithium ion rechargeable battery, and charge it in time when the power is insufficient, which is convenient for later use and has higher safety. Moreover, the polymer lithium ion rechargeable battery has a high power level, is light in overall weight, small in size, easy to carry, and has high reliability.

[0021] In actual use, the user powers on the pneumatic brake control assembly by pressing the power switch of the button switch, and then starts the operation of the brake cylinder by pressing the control switch during the slow descent, and the brake cylinder continuously pushes the drive rack and drives the drive gear plate to rotate, thereby using the arc-shaped drive groove on the drive gear plate to drive the brake push rod to gradually clamp the brake wheel disc, thereby continuously increasing the friction damping between the brake push rod and the brake wheel disc until the slow descent stops. The operation is simple, which is conducive to the user to adjust the slow descent speed at any time according to actual needs, and the controllability is strong.

[0022] In addition, the backpack body of the present invention is also provided with a smoke alarm with Internet of Things and positioning functions, and the smoke alarm is wirelessly connected to the user's mobile terminal through the Internet of Things communication module. When a fire occurs indoors, the smoke alarm can immediately sound an alarm and wirelessly send the fire warning to the user's mobile terminal, and the user can also quickly find the specific location of the backpack body through the GPS positioning module of the smoke alarm on the mobile terminal, preventing the trapped personnel from being unable to accurately find the escape backpack under the interference of the fire smoke and fire when the fire occurs, which is conducive to the trapped personnel finding the escape backpack in time and slowly descending to escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the escape backpack of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the descending device of the present invention;

[0025] Figure 3 It is a schematic diagram of the axial side cross-section structure of the descending device of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the planetary gear mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the brake chamber structure of the present invention;

[0028] Figure 6 A schematic diagram of the structure of the drive gear plate of the present invention;

[0029] Figure 7 It is a side view of the limiting base and the brake top rod of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure in which the driving gear plate of the present invention drives the brake push rod to be retracted;

[0031] Fig. 9 This is a schematic diagram of the structure in which the driving gear plate of the present invention drives the brake push rod to extend.

[0032] In the figure: 1. backpack body, 11. safety strap, 12. shoulder strap, 13. storage bag, 2. descender, 21. central axis, 22. winding wheel, 221. first circular plate, 222. cylinder, 223. second circular plate, 224. limit ring, 23. wire rope, 24. safety hook, 25. first fixed plate, 251. binding groove, 26. second fixed plate, 261. rotating shaft, 27. connecting rod, 28. bearing, 29. bearing, 30. screw, 31. screw, 32. bearing, 33. roller, 34. wire rope threading bracket, 35. guide wheel, 36. gear ring, 37. sun gear, 38. planetary gear, 39. fixed slide bar, 40. friction block, 41. friction block reset spring, 42. brake chamber, 421. through hole, 42 2. Limiting ring, 423. Notch, 43. Brake wheel, 44. Brake push rod, 441. Connecting column, 4411. Sleeve, 45. Limiting base, 451. Guide groove, 46. Driving gear plate, 461. Circular avoidance space, 462. Arc driving groove, 47. Driving rack, 48. Brake cylinder, 49. Screw, 50. Bearing, 51. Screw, 52. Limiting slide groove, 53. Slide rail, 54. Screw, 55. 24V power supply, 551. Power indicator light, 56. Meter control controller, 57. Dual-way solenoid valve, 58. Miniature gas cylinder, 581. Pressure display gauge, 582. Switch valve, 59. Push button switch, 591. Power switch, 592. Control switch, 60. Wire, 61. Air duct, 62. Air duct, 7. Smoke alarm. DETAILED DESCRIPTION

[0033] The structure of the present invention is further described below in conjunction with the accompanying drawings and preferred specific embodiments of the present invention.

[0034] Reference Figure 1 to Figure 2 As shown in, the present invention:

[0035] A high-rise escape backpack with controllable descent speed comprises a backpack body 1, a descent control device 2 is fixedly arranged in a cavity of the backpack body 1, a winding wheel 22 is rotatably connected to the fixed frame of the descent control device 2 via a central axis 21, a steel wire rope 23 is arranged on the winding wheel 22, the tail end of the steel wire rope 23 is fixedly connected to the winding wheel 22, the head end of the steel wire rope 23 extending outside the backpack body 1 is provided with a safety hook 24 hung on a fixed anchor point indoors, the descent control device 2 is provided with a planetary gear mechanism for driving the central axis 21 to rotate in the opposite direction during the rotation of the winding wheel 22, and a friction damping mechanism for hindering the rotation of the winding wheel 22 to allow the steel wire rope 23 to be slowly released outwards.

[0036] Specifically, refer to Figure 1 As shown, the backpack body 1 of the present invention is made of fireproof and high temperature resistant fabric material, and is provided with a safety strap 11 and a shoulder strap 12. When actually in use, the backpack body 1 is tied and fixed to the user by the safety strap 11 and the shoulder strap 12.

[0037] Specifically, refer to Figures 2 to 3 As shown, the fixing frame of the descending device 2 of the present invention includes a first fixing plate 25 and a second fixing plate 26 which are parallel to each other and made of stainless steel. The first fixing plate 25 and the second fixing plate 26 are screwed and fixedly connected as a whole through a plurality of connecting rods 27. A first through hole (not shown in the figure) and a second through hole (not shown in the figure) are respectively opened at the middle positions corresponding to the first fixing plate 25 and the second fixing plate 26. The central shaft 21 passes through a bearing 28 (as shown in FIG. Figure 4 As shown in the figure, the central axis 21 is rotatably connected to the first through hole and the second through hole, and the two ends of the central axis 21 respectively pass through the first through hole and the second through hole to extend out of the first fixing plate 25 and the second fixing plate 26.

[0038] Specifically, binding grooves 251 are provided at four sides of the first fixing plate 25 , and the fixing frame is bound and fixed in the cavity of the backpack body 1 through the four binding grooves 251 .

[0039] Specifically, two corresponding rollers 33 located on the upper part of the winding wheel 22 are rotatably connected between the upper parts of the first fixed plate 25 and the second fixed plate 26, and a wire rope threading bracket 34 is provided on the upper part of the two rollers 33, which is threadedly fixedly connected to the upper edges of the first fixed plate 25 and the second fixed plate 26. A guide wheel 35 for guiding the wire rope 23 is rotatably connected in the wire rope threading bracket 34 through a pin shaft (not marked in the figure). During actual assembly, the head end of the wire rope 23 passes through the gap between the two rollers 33, bypasses the guide wheel 35, and extends out of the fixed frame through the wire rope threading bracket 34.

[0040] The roller 33 and the guide wheel 35 provided in the present invention can effectively reduce the friction between the wire rope 23 and the fixed frame when it is released outward, and the wire rope threading bracket 34 and the guide wheel 35 can effectively limit the position of the wire rope 23 released outward, preventing the wire rope 23 from swinging back and forth during the release process and affecting the normal slow descent.

[0041] Specifically, refer to Figure 3 As shown, the reel 22 of the present invention includes a first circular plate 221 corresponding to the inner side of the first fixed plate 25, and a third through hole (not shown in the figure) for the central axis 21 to pass through is provided at the center of the circle, and a bearing 29 is rotatably connected between the third through hole and the central axis 21. A cylinder 222 coaxial with the central axis 21 is threadedly fixedly connected to the right side of the first circular plate 221 facing the second fixed plate 26 through a screw 30, and a second circular plate 223 parallel to and opposite to the first circular plate 221 is threadedly fixedly connected to the right end opening of the cylinder 222 corresponding to the second fixed plate 26 through a screw 31, and the diameter of the second circular plate 223 matches the diameter of the opening of the cylinder 222. A fourth through hole (not shown in the figure) for the central axis 21 to pass through is provided at the center of the second circular plate 223, and a bearing 32 is rotatably connected between the fourth through hole and the central axis 21. A stop ring 224 is threadedly fixedly connected to the second circular plate 223 at the right edge of the second fixed plate 26 by a screw rod 31 and is parallel to and opposite to the first circular plate 221. The outer diameter of the stop ring 224 matches the diameter of the first circular plate 221, and the inner diameter of the stop ring 224 matches the cross-sectional diameter of the cylinder 222. The steel wire rope 23 is evenly coiled on the outer wall of the cylinder 222 and is located between the first circular plate 221 and the stop ring 224.

[0042] The fixing frame and the winding wheel 22 of the present invention are compact and simple in structure, highly reliable, and easy to assemble, which is beneficial to production assembly and later use and maintenance.

[0043] Specifically, refer to Figure 3 and Figure 4As shown, the planetary gear mechanism of the present invention includes a gear ring 36, a sun gear 37 and a planetary gear 38. The diameter of the gear ring 36 matches the diameter of the second circular plate 223, and is clamped and fixed between the limit ring 224 and the second circular plate 223 by a screw 31. The sun gear 37 is fixedly sleeved on the central shaft 21 and is located at the center of the gear ring 36. A total of three planetary gears 38 are evenly meshed between the gear ring 36 and the sun gear 37 at an angle of 120°. Three rotating shafts 261 that are parallel to the central shaft 21, evenly surround the outside of the central shaft 21 and extend toward the second circular plate 223 are fixedly connected to the side of the second fixed plate 26 facing the first fixed plate 25. The planetary gears 38 are rotatably connected to the rotating shafts 261 so that when the winding wheel 22 is pulled by the wire rope 23 and rotates, the torque of the gear ring 36 is transmitted to the sun gear 37 through the planetary gears 38, thereby driving the central shaft 21 to rotate in the opposite direction of the rotation direction of the winding wheel 22 through the sun gear 37.

[0044] The present invention transmits the torque of the winding wheel 22 in reverse to the central shaft 21 through the planetary gear mechanism, so that the two rotate relative to each other. The structure is simple and reliable, and the diameter of the planetary gear 38 is larger than the diameter of the sun gear 37, ensuring that when the winding wheel 22 rotates, it can drive the central shaft 21 to rotate in the opposite direction at a relatively fast speed, which is beneficial for the friction damping mechanism to provide friction damping to slow down the rotation speed of the winding wheel 22.

[0045] Specifically, the friction damping mechanism of the present invention includes a passive centrifugal speed reduction mechanism and an active air brake speed reduction mechanism.

[0046] Specifically, refer to Figure 3 As shown, the passive centrifugal speed reduction mechanism of the present invention includes a fixed slide bar 39 vertically fixedly inserted on the central shaft 21, and the fixed slide bar 39 is radially located in the cylinder 222 of the winding wheel 22, and its two ends extend to the inner wall of the cylinder 222. A friction block 40 is slidably connected to the two ends of the fixed slide bar 39, and a set of friction block return springs 41 are provided between each friction block 40 and the central shaft 21, which are arranged on the fixed slide bar 39 and are used to drive the friction block 40 to elastically abut against the inner wall of the cylinder 222 of the winding wheel 22 to provide friction damping.

[0047] The friction block return spring 41 of the present invention can elastically drive the friction block 40 to automatically abut against the inner wall of the cylinder 222 of the winding wheel 22 under normal conditions. When the winding wheel 22 rotates under the pulling of the wire rope 23, the planetary gear mechanism drives the central shaft 21 to rotate in the opposite direction. During the reverse rotation of the central shaft 21, the fixed slide rod 39 is driven to rotate synchronously, so that the friction block 40 slidably sleeved on both ends of the fixed slide rod 39 slides and abuts against the inner wall of the cylinder 222 under the action of centrifugal force and the elastic force of the friction block return spring 41 to hinder its rotation.

[0048] The passive centrifugal deceleration mechanism of the present invention can provide a certain friction damping for the descending retarder 2. As long as the winding wheel 22 of the descending retarder 2 rotates, the friction block 40 will slide against the inner wall of the cylinder 222 and provide corresponding friction damping. When used by a person with a light weight, he can rely only on the friction damping provided by the passive centrifugal deceleration mechanism to escape by descending slowly.

[0049] Specifically, the active air brake deceleration mechanism of the present invention includes a first brake assembly and a second brake assembly correspondingly arranged on both sides of a fixing frame, and a pneumatic brake control assembly for controlling the operation of the first brake assembly and the second brake assembly.

[0050] Specifically, refer to Figure 2 , Figure 3 , Figures 5 to 9 As shown, the first brake assembly and the second brake assembly of the present invention both include a brake chamber 42, a brake wheel disc 43, a brake top rod 44, a limit base 45, a drive gear disc 46, a drive rack 47 and a brake cylinder 48. The brake chamber 42 is an oblate cylindrical structure as a whole, and is respectively connected to the brake cylinder 48 by screws 49 (such as Figure 3 The brake chamber 42 is fixedly connected to the outer wall of the first fixing plate 25 or the second fixing plate 26. A through hole 421 (as shown) is provided at the center position of the circular end surface of the first fixing plate 25 or the second fixing plate 26. Figure 5 As shown, both ends of the central shaft 21 are respectively connected by bearings 50 (as shown in FIG. Figure 3 As shown) is rotatably connected between the through holes 421 on the circular end faces of the two brake chambers 42.

[0051] Specifically, refer to Figure 3 As shown, the two brake discs 43 are respectively fixedly sleeved at the two ends of the central shaft 21 and are correspondingly located in the middle of the brake chamber 42. The limiting base 45 is an annular structure as a whole, and is correspondingly sleeved on the outer side of the brake disc 43 and is connected through a screw 51 (as shown in FIG. Figure 2 As shown) is threadedly fixedly connected to the circular end surface of the brake chamber 42.

[0052] Specifically, refer to Figure 3 , Figures 7 to 9 As shown, each limiting base 45 is radially and evenly distributed with eight guide grooves 451 connected to the middle brake wheel disc 43, and each brake top rod 44 is correspondingly and movably arranged in each guide groove 451. The head end of the brake top rod 44 faces the brake wheel disc 43, and the tail end of the brake top rod 44 vertically extends outward to have a connecting column 441 parallel to the central axis 21 and extending to the outer wall of the first fixing plate 25 or the second fixing plate 26. The outer wall of the first fixing plate 25 or the second fixing plate 26 is provided with eight limiting slide grooves 52 (such as 52) arranged in a scattered manner and corresponding to the guide grooves 451, and the ends of the limiting connecting column 441 move radially Figure 3 as shown).

[0053] Specifically, refer to Figure 3 , Figure 5 and Figure 6 As shown, the driving gear plate 46 is an overall flat cylindrical structure, which is rotatably connected in the two brake chambers 42 respectively, and one end of the circular opening of the driving gear plate 46 is movably connected to the circular end face of the brake chamber 42, and a limiting ring 422 for limiting the driving gear plate 46 is vertically provided on the edge of the circular end face of the brake chamber 42. After assembly, the inner wall of the driving gear plate 46 movably abuts against the outer wall of the limiting ring 422, and rotates in the brake chamber 42 under the limiting and guiding action of the limiting ring 422.

[0054] Specifically, a circular avoidance position 461 for the central axis 21 and the brake wheel disc 43 to pass through is provided at the middle position of the end surface of the driving gear plate 46 between the limiting base 45 and the first fixing plate 25 or the second fixing plate 26. Eight arc-shaped driving grooves 462 arranged in a divergent manner are evenly distributed on the end surface of each driving gear plate 46. Each arc-shaped driving groove 462 corresponds to a guide groove 451 and a brake top rod 44, and the connecting column 441 at the rear end of each brake top rod 44 is inserted into the corresponding arc-shaped driving groove 462.

[0055] Specifically, refer to Figure 2 , Figure 3 , Figure 5 As shown, the outer wall of the driving gear plate 46 is surrounded by teeth, and one side of the outer wall of the brake chamber 42 is provided with a notch 423 (as shown in FIG. Figure 5 The first fixing plate 25 and the second fixing plate 26 are both provided with a slide rail 53 on the outer surface thereof corresponding to one side of the notch 423 (as shown in FIG. Figure 2 As shown in FIG. 4 , two drive racks 47 are respectively slidably connected to two slide rails 53, and the two drive racks 47 are respectively meshed with the drive gear plate 46 through two notches 423. The two brake cylinders 48 are respectively connected to the two slide rails 53 through two notches 423. Figure 2 The first fixing plate 25 and the second fixing plate 26 are threadedly fixedly connected to the outer surface of the first fixing plate 25 or the second fixing plate 26, and the piston rod of the brake cylinder 48 is axially fixedly connected to the driving rack 47 to drive the driving rack 47 to slide along the slide rail 53 and drive the driving gear plate 46 to rotate in the brake chamber 42. During the rotation of the driving gear plate 46, the eight brake push rods 44 are driven to clamp the brake wheel disc 43 radially along the guide groove 451 through the arc-shaped driving groove 462 and the connecting column 441, thereby generating friction damping between the brake push rods 44 and the brake wheel disc 43. As the brake cylinder 48 continues to push, the force of the brake push rod 44 clamping the brake wheel disc 43 continues to increase, and the friction damping generated between the two will also continue to increase, thereby achieving the purpose of adjusting the damping size during the slow descent process of the present invention.

[0056] The brake top rod 44 of the present invention is limited between the circular end surface of the brake chamber 42 and the first fixed plate 25 or the second fixed plate 26 by the connecting column 441 and the limiting groove 52, preventing the brake top rod 44 from deviating or shaking along the axial direction of the central axis 21 during the radial movement along the guide groove 451, ensuring that the head end of the brake top rod 44 can accurately abut against the brake wheel 43, thereby improving the reliability of the present invention.

[0057] Furthermore, a sliding sleeve 4411 is rotatably sleeved on the connecting column 441 and is movable in the arc-shaped driving groove 462. When the driving gear plate 46 rotates and drives the brake top rod 44 to clamp the brake wheel disc 43, the sliding sleeve 4411 can effectively reduce the friction between the connecting column 441 and the arc-shaped driving groove 462, slow down the wear of the arc-shaped driving groove 462, increase the service life of the brake assembly, and ensure the reliability of the driving gear plate 46 driving the brake top rod 44 to clamp the brake wheel disc 43.

[0058] It should be noted that, in order to ensure that the brake push rod 44 can continuously clamp the brake wheel disc 43 under the drive of the driving gear plate 46, the radial spacing difference between the two ends of the arc-shaped driving groove 462 of the driving gear plate 46 should be greater than the moving distance of the head end of the brake push rod 44 to the brake wheel disc 43. That is, when the driving gear plate 46 drives the head end of the brake push rod 44 to clamp on the brake wheel disc 43, the connecting column 441 is not completely moved to the other end of the arc-shaped driving groove 462, and there is still a certain distance between the two so that the driving gear plate 46 can further drive the brake push rod 44 to clamp the brake wheel disc 43, thereby preventing the problem that the arc-shaped driving groove 462 of the driving gear plate 46 cannot drive the brake push rod 44 to clamp the brake wheel disc 43 due to the wear of the brake push rod 44 after long-term use, thereby ensuring the reliability of the first brake assembly and the second brake assembly of the present invention.

[0059] Moreover, in this embodiment, eight brake push rods 44 are provided in each brake assembly, which is only a preferred embodiment of the present invention and is not a limitation of the present invention. Eight brake push rods 44 can better clamp the brake wheel 43, provide the brake assembly with the greatest possible friction damping, and also reduce the wear of the brake push rods 44, thereby increasing their service life. Of course, in some other embodiments, the number of brake push rods 44 in each brake assembly can be three or more, as long as the brake push rods 44 can effectively clamp the brake wheel 43.

[0060] When a person with a heavier weight uses the present invention to perform slow descent escape, if the friction damping provided by the passive centrifugal deceleration mechanism cannot make it slowly descend at an appropriate speed, the user can control the operation of the first brake assembly and the second brake assembly through the pneumatic brake control assembly as needed, and use the brake cylinder 48 to drive the brake top rod 44 to clamp the brake wheel 43, thereby increasing the damping size provided by the friction damping mechanism until the user can perform slow descent at an appropriate speed, or brake the winding wheel 22, so that the user can hover at an appropriate position as needed to avoid obstacles or enter other floors to escape. It has strong controllability and does not require high weight for the user. It is suitable for people of different weights and has strong applicability. Moreover, the first brake assembly and the second brake assembly of the present invention are used in combination to play a double insurance role. Even if one of the brake assemblies fails during use, the other brake assembly will still work. Even if both the first brake assembly and the second brake assembly fail, the friction damping mechanism of the present invention still has the passive centrifugal brake mechanism working, which can maximize the safety of the user and has higher reliability.

[0061] In addition, the driving rack 47 of the first brake assembly and the second brake assembly of the present invention drives the driving gear plate 46 meshed therewith to rotate under the drive of the brake cylinder 48. During the rotation of the driving gear plate 46, the arc-shaped driving groove 462 and the connecting column 441 drive the brake jack 44 to radially clamp the brake wheel disc 43. The structure is relatively simple, and the brake chamber 42, the brake wheel disc 43, the brake jack 44, the limiting base 45 and the driving gear plate 46 are all radially arranged around the outside of the central axis 21. The overall thickness can be designed to be thinner, occupying less space, and reducing the overall structural size of the descending device 2 and its weight. Moreover, the use of the brake cylinder 48 as a power source to drive the driving gear plate 46 to rotate has a faster response speed compared to the traditional hydraulic power source, a simpler structure, convenient use and maintenance, higher reliability, and a longer service life. In addition, compared with the hydraulic power source, the active air brake deceleration mechanism used in the present invention can be safely used in high-temperature fire scenes, further improving the safety and reliability of the present invention.

[0062] Specifically, refer to Figure 1 and Figure 2As shown, the pneumatic brake control assembly of the present invention includes a 24V power supply 55, a meter control controller 56, a two-way solenoid valve 57, a micro gas cylinder 58 and a button switch 59. The 24V power supply 55 is arranged in the cavity of the backpack body 1 and is connected to the input end of the meter control controller 56 through a wire 60. The meter control controller 56 is arranged in the cavity of the backpack body 1, and its output end is connected to the input end of the two-way solenoid valve 57. The micro gas cylinder 58 is arranged in the cavity of the backpack body 1, and its air outlet is connected to the air inlet of the two-way solenoid valve 57 through an air guide pipe 61. The two-way solenoid valve 57 is arranged in the cavity of the backpack body 1, and its air outlet is connected to the brake cylinder 48 through an air guide pipe 62. The button switch 59 is arranged outside the backpack body 1 to facilitate the user to hold and control it during the slow descent process.

[0063] Specifically, refer to Figure 2 and Figure 3 As shown, the button switch 59 of the present invention includes a power switch 591 and a control switch 592. When the power switch 591 is pressed, the 24V power supply 55 supplies power or cuts off power to the pneumatic brake control component. When the control switch 592 is continuously pressed, the two-way solenoid valve 57 remains powered on, and its gas outlet port is opened to output the high-pressure gas in the micro gas bottle 58 to the brake cylinder 48 through the air duct 62, so that the piston rod of the brake cylinder 48 continuously pushes the driving rack 47 slidably connected to the slide rail 53 under the action of the high-pressure gas. During the movement of the driving rack 47, the driving gear plate 46 meshed with it is driven to rotate, and then the brake top rod 44 is driven to clamp the brake wheel disc 43 through the driving gear plate 46, thereby gradually increasing the friction damping between the brake top rod 44 and the brake wheel disc 43.

[0064] When not in use, the user can cut off the power to the pneumatic brake control component through the power switch 591, thereby reducing the power consumption of the 24V power supply 55 and increasing its battery life.

[0065] Preferably, a pressure display gauge 581 and a switch valve 582 are provided on the opening of the micro gas cylinder 58 for displaying the internal air pressure, and at least one spare micro gas cylinder is also provided in the cavity of the backpack body 1. The micro gas cylinder 58 is small in size, light in weight, easy to carry, contains many types of gas, is easy to purchase, and has a low price.

[0066] When not in use, the user can close the micro gas cylinder 58 by switching the valve 582 to prevent the gas from leaking outwards and increase its service life. Moreover, the user can conveniently understand the gas content in the micro gas cylinder 58 by observing the value of the pressure display meter 581, and can replace the spare micro gas cylinder 58 in time when the pressure is insufficient, which is safer.

[0067] The brake cylinder 48 of the present invention is driven by the high-pressure gas in the micro gas cylinder 58. Since the compressed gas has certain buffering characteristics, it can play a certain buffering effect compared to the hydraulic power source, which to a certain extent reduces the load borne by the brake cylinder 48, reduces the wear of the drive rack 47 and the drive gear plate 46, and improves its service life.

[0068] Moreover, the pneumatic brake control assembly of the present invention is controlled by a meter controller 56, which does not require the user's professional skill level. Ordinary people can use or maintain it normally without professional training, and the use cost is low and the reliability is high.

[0069] Preferably, refer to Figure 2 As shown, the 24V power supply 55 of the present invention is a polymer lithium ion rechargeable battery, which is provided with a power indicator 551 for displaying its power. The user can easily grasp the power status of the 24V power supply 55 through the power indicator 551, and charge it in time when the power is insufficient, which is convenient for later use. Moreover, the power of the polymer lithium ion rechargeable battery is relatively high, which ensures the battery life of the present invention. In addition, the polymer lithium ion rechargeable battery is light in weight, compact in size, easy to carry, and highly reliable.

[0070] Further, see Figure 1 As shown, the backpack body 1 of the present invention is further provided with a zipper storage bag 13 on the outside, and a smoke alarm 7 is arranged in the storage bag 13. The smoke alarm 7 is equipped with an Internet of Things communication module (not shown in the figure) for wirelessly connecting the smoke sensor to the user's mobile terminal and a GPS positioning module (not shown in the figure) for detecting the specific position of the smoke sensor.

[0071] Under normal circumstances, the smoke alarm 7 on the backpack body 1 detects the smoke situation in the surrounding environment. Once the indoor smoke concentration exceeds the preset safe concentration range, the smoke sensor will automatically send out an audible and visual alarm to remind indoor personnel to pay attention to the fire.

[0072] Since the probability of using the escape backpack is low, it is usually stored in a hidden corner or cabinet. After a period of time, the user may forget where the escape backpack is placed. Once a fire occurs indoors, the smoke alarm 7 can sound an alarm to warn in the first time, and the user can also identify the specific location of the escape backpack by sound, which is conducive to quickly finding the escape backpack. In addition, the smoke alarm 7 is wirelessly connected to the user's smart terminal through the Internet of Things communication module. When no one is indoors, the user can also receive the alarm of the indoor fire through the smart terminal, which is convenient for the user to call the fire department in time to report the fire and reduce the losses caused by the fire. At the same time, the smoke alarm 7 is preferably equipped with a GPS positioning module. When the trapped person cannot find the escape backpack through the sound of the smoke alarm 7, the GPS positioning module can be used through the mobile terminal to quickly locate the location of the escape backpack.

[0073] The above embodiments are only for the purpose of clearly describing a specific implementation of the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other adjustments or modifications to the backpack body 1, the descender 2, the planetary gear mechanism, the friction damping mechanism, etc. can be deduced and summarized based on the present invention, or other methods of use deduced and summarized based on the present invention are not listed here one by one. Any modification, replacement or improvement made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A high-rise escape backpack with controllable descent speed, comprising a backpack body, a descent control device fixedly arranged in a cavity of the backpack body, a winding wheel rotatably connected to a central axis in a fixed frame of the descent control device, a steel wire rope being arranged on the winding wheel, a safety hook being hung on a fixed anchor point indoors at the head end of the steel wire rope extending out of the backpack body, a planetary gear mechanism for driving the central axis to rotate in the opposite direction during the rotation of the winding wheel, and a friction damping mechanism for hindering the rotation of the winding wheel so that the steel wire rope is slowly released outwards on the descent control device; the characteristics are as follows: The friction damping mechanism includes a passive centrifugal reduction mechanism and an active air brake reduction mechanism. The active air brake reduction mechanism includes a first brake assembly and a second brake assembly correspondingly arranged on both sides of a fixed frame, and a pneumatic brake control assembly. The first brake assembly and the second brake assembly both include a brake chamber, a brake disc, a brake push rod, a limiting base, a driving gear plate, a driving rack and a brake cylinder. The brake chamber is fixedly connected to the outer wall of the fixed frame, and the central axis is rotatably connected between the centers of the two brake chamber end faces. The brake disc is fixedly sleeved on one end of the central axis and is located in the brake chamber. The limiting base surrounds the outside of the brake disc and is fixedly connected to the end face of the brake chamber, and has a plurality of guide grooves radially distributed thereon that are connected to the brake disc. The brake push rod is movably connected in the guide groove. The driving gear plate The wheel disc is rotatably connected in the brake chamber, and the end face of the corresponding limit base is evenly distributed with arc-shaped driving grooves equal to the number of the brake push rod. The brake push rod is provided with a connecting column corresponding to the arc-shaped driving groove, and at least 3 guide grooves are set on each of the limit bases; a notch is provided on the annular outer wall of the brake chamber, and the driving rack is slidably connected to the outer wall of the fixed frame and meshes with the driving gear plate through the notch; the brake cylinder is fixedly connected to the outer wall of the fixed frame, and its piston rod is axially connected to the driving rack. When the pneumatic brake control assembly drives the brake cylinder to push the driving rack, the driving gear plate rotates and drives the brake push rod through the arc-shaped driving groove to radially clamp the brake wheel disc along the guide groove to hinder the rotation of the winding wheel disc through the central axis and the planetary gear mechanism; the rotating sleeve on the connecting column is provided with a sliding sleeve that is movable in the arc-shaped driving groove.

2. The high-rise escape backpack with controllable descent speed according to claim 1, characterized in that: The pneumatic brake control component includes a 24V power supply, a meter control controller, a two-way solenoid valve, a miniature gas storage bottle and a button switch. The 24V power supply is connected to the meter control controller, the output end of the meter control controller is connected to the input end of the two-way solenoid valve, the miniature gas storage bottle is connected to the air inlet of the two-way solenoid valve through an air duct, and its air outlet is connected to the brake cylinder through an air duct, and the button switch is connected to the input end of the meter control controller.

3. The high-rise escape backpack with controllable descent speed according to claim 2 is characterized by: The button switch includes a power switch and a control switch. When the power switch is pressed, the 24V power supply supplies power or cuts off power to the pneumatic brake control component. When the control switch is continuously pressed, the two-way solenoid valve remains powered on so that the piston rod of the brake cylinder continues to push the drive rack, thereby gradually increasing the friction damping between the brake push rod and the brake wheel disc.

4. The high-rise escape backpack with controllable descent speed according to claim 2 is characterized by: The miniature gas storage bottle is provided with a pressure display gauge for displaying the internal air pressure thereof, and the containing cavity of the backpack body is provided with at least one spare miniature gas storage bottle.

5. The high-rise escape backpack with controllable descent speed according to claim 2 is characterized by: The 24V power supply is a polymer lithium ion rechargeable battery, which is provided with a power indicator light for displaying the power level.

6. The high-rise escape backpack with controllable descent speed according to claim 1 is characterized by: The planetary gear mechanism includes a gear ring fixedly connected to the winding wheel, a sun gear located at the center of the gear ring is fixedly provided on the central shaft, and three planetary gears are rotatably connected to the fixed frame, which are respectively meshed between the sun gear and the gear ring and transmit the torque of the gear ring to the sun gear when the winding wheel rotates to drive the central shaft to rotate in the opposite direction relative to the winding wheel.

7. The high-rise escape backpack with controllable descent speed according to claim 1 is characterized by: The passive centrifugal reduction mechanism includes a fixed slide rod vertically inserted on the central axis, with both ends extending to the inner wall of the winding wheel disk, and a friction block is slidably connected to each end of the fixed slide rod. A set of friction block return springs is provided between each friction block and the central axis, which is arranged on the fixed slide rod and is used to drive the friction block to elastically abut against the inner wall of the winding wheel disk to provide friction damping.

8. The high-rise escape backpack with controllable descent speed according to claim 1 is characterized by: The backpack body is also provided with a smoke alarm, which has an Internet of Things communication module and a GPS positioning module built in. The Internet of Things communication module is wirelessly connected to the user's smart terminal to send smoke detection data and positioning detection data to the user.

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