WO2023024326A1

WO2023024326A1 - High-altitude escape backpack, and descend control device thereof with retractable rope

Info

Publication number: WO2023024326A1
Application number: PCT/CN2021/136716
Authority: WO
Inventors: 冯铭
Original assignee: 金华捷科工具有限公司
Priority date: 2021-08-23
Filing date: 2021-12-09
Publication date: 2023-03-02
Also published as: CN113559429A

Abstract

A high-altitude escape backpack, and a descend control device thereof with a retractable rope. The descend control device comprises a fixing support (11), a hub (12) rotatably mounted on the fixing support (11) for the winding of the rope, and a fixing groove (121) formed on the hub (12) for fixing an end of the rope, wherein the fixing support (11) is further provided with a guide mechanism for guiding the rope; the guide mechanism comprises a first roller set (41) and a second roller set (42), the first roller set (41) being arranged perpendicular to the second roller set (42); the first roller set (41) is composed of two first guide rollers (411) arranged in parallel; and the second roller set (42) is composed of two second guide rollers (421) arranged in parallel, and the second guide roller (421) for the winding of the rope is rotatably sleeved with a shaft sleeve (422). In the descend control device, the first roller set (41) and the second roller set (42) are provided to position the rope to limit the rope-out position, which ensures the balance of the descend control device, thereby improving the safety.

Description

A high-altitude escape backpack and its rope retrievable descending device

technical field

The invention belongs to the technical field of escape equipment, and in particular relates to a high-altitude escape backpack and a retractable rope descending device thereof.

Background technique

At present, the pace of urbanization is getting faster and faster, and the tension of urban land has led to more and more high-rise buildings. When disasters such as fires occur on high floors, people have limited ways to evacuate the accident site, and the risk factor is high. In this context, high-floor slow-descent escape equipment was born. However, the deceleration mechanism of the current slow-descent escape equipment has low reliability and poor slow-down effect, which makes the safety performance of the slow-descent escape equipment low. If it is possible to use would have extremely serious consequences.

The existing slow-descent escape equipment does not limit the exit position of the rope, resulting in poor balance and low safety of the slow-descent escape equipment; and the current slow-descent escape equipment cannot be recovered in time after work, and can only be used by a single person. And in high-rise buildings, it is impossible for everyone to configure them individually, therefore, this defect of the escape device limits its popularization and application, and increases the cost of use.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a rope-recoverable descending device and a high-altitude escape backpack using the descending device.

In order to achieve the above object, the present invention adopts the following technical solutions: a rope retrievable descending device, comprising

fixed frame;

The hub is rotatably mounted on the fixed frame and is used for winding the rope;

A fixing groove is arranged on the hub and is used for fixing the end of the rope;

A guide mechanism for guiding the rope is also provided on the fixed frame, and the guide mechanism includes a first roller set and a second roller set, and the first roller set and the second roller set are vertically arranged; the first roller set and the second roller set are vertically arranged; The roller set is composed of two first guide rollers arranged in parallel; the second roller set is composed of two second guide rollers arranged in parallel, and the second guide roller for rope winding is rotatably sleeved with a bushing ; Take the plane coincident with the axis of the hub as the first reference plane, and use the first reference plane as the section of the centrifugal deceleration mechanism, on this section, the axis of the first guide roller on the side away from the user and the fixed frame are away from the user The distance between the inner walls on one side is L1, the distance between the axis of the first guide roller on the side away from the user and the inner wall on the side of the fixing frame close to the user is L2, wherein L1:L2 is 1:1.5-1.8 .

Optionally, the inner wall of the hub is provided with a first damping part, and the centrifugal block is provided with a second damping part matched with the first damping part, and the plane coincident with the axis of the hub is used as the first reference plane, so as to The first reference plane is used as a section of the centrifugal deceleration mechanism. On this section, the angle formed by the waists on both sides of the first damping part is α, and the angle formed by the side walls on both sides of the second damping part is β, where β≤ α≤1.2β.

Optionally, side plates are provided on both sides of the hub; a braking device is installed on the fixing frame to cooperate with the side plates to brake the hub; a battery for powering the braking device is installed on the fixing frame.

Optionally, it also includes a centrifugal deceleration mechanism associated with the hub to limit the rotation speed of the hub, the centrifugal deceleration mechanism includes a main shaft passing through the hub and rotatably mounted on the fixed frame, A guide rod arranged along the circumferential direction of the main shaft, a centrifugal block slidably sleeved on the guide rod, the hub drives the main shaft to rotate through a transmission mechanism; when the main shaft drives the guide rod to rotate, the centrifugal block contacts the hub under the action of centrifugal force The inner wall is frictionally fitted; the fixed frame is also provided with a driving mechanism associated with the main shaft to drive the rotation of the main shaft. The first bevel gear that rotates and fits, the second bevel gear that is arranged in the transmission case and meshes with the first bevel gear, and the motor used to drive the second bevel gear to rotate, and the motor is installed on the fixed frame through the motor base.

Optionally, the main shaft is associated with the guide rod through a one-way clutch assembly to drive the guide rod to rotate in one direction; the one-way clutch assembly includes a one-way bearing sleeved on the main shaft and a one-way bearing sleeved on the one-way bearing. The inner ring of the one-way bearing is engaged with the main shaft in anti-rotation, and the outer ring of the one-way bearing is engaged with the collar in anti-rotation, and the end of the guide rod facing the main shaft is connected with the collar.

Optionally, two sets of one-way clutch assemblies are provided, and two guide rods are matched with the same centrifugal block, and the two guide rods correspond to two sets of one-way clutch assemblies; and/or the main shaft A first enlarged diameter portion is provided on the top, and the one-way bearings of the two sets of one-way clutch assemblies are symmetrically arranged on both sides of the first enlarged diameter portion.

Optionally, a baffle is provided at the end of the collar away from the first diameter-expanding part, and screws/bolts are used to pass through one of the baffles, two collars and the other baffle in turn and then fixed by bolts; and/or the An elastic piece is sheathed on the guide rod, and one end of the elastic piece is connected with the outer circumference of the collar, and the other end is connected with the centrifugal block.

Optionally, side plates are provided on both sides of the hub; the diameter of the side plate is set as D1, the diameter of the bushing is set as D2, the plane perpendicular to the axis of the hub is the second reference plane, and the axis of the bushing is at The projection point on the second datum plane is the first datum point C1, the projection point of the hub axis on the second datum plane is the second datum point C2, and the length of the line connecting C1 and C2 is L3, where (0.54-0.6 )*(D1+D2)>L3>0.5(D1+D2).

Optionally, the mass of the storage battery is set to m1, the mass of the braking device is set to m2, the plane perpendicular to the axis of the hub is taken as the second reference plane, and the straight line intersecting and perpendicular to the axis of the hub is set as the first reference line R1 , the projection point of the center of the smallest spherical surface that can completely cover the battery on the second reference plane is E1, the vertical distance from E1 to the first reference line R1 is L4, and the center of the smallest spherical surface that can completely cover the brake device is at The projected point on the second datum plane is E2, and the vertical distance from E2 to the first datum line R1 is L5, where m1*L4=(0.8-1.2)m2*L5; and/or when the descender as a whole is in an inclined state , take the plane passing through the axis of the main shaft and set vertically as the third reference plane, take the projection point of the center of the smallest spherical surface that can completely cover the battery on the third reference plane as E3, and take the smallest spherical surface that can completely cover the brake device The projection point of the center of the center on the third datum plane is E4, the intersection point of the projection of the hub axis on the third datum plane and the line E3E4 is E5, and the horizontal straight line passing through E5 is the second datum line R2, from E3 to The vertical distance from the second reference line R2 is L6, and the vertical distance from E4 to the second reference line R2 is L7, where m1*L6=(0.8-1.2)m2*L6.

Optionally, the transmission mechanism includes a ring gear arranged on the inner wall of the hub, a plurality of planetary gears respectively meshing with the ring gear, and a sun gear sleeved on the main shaft and engaged with the main shaft to prevent rotation. The gear meshes with multiple planetary gears simultaneously.

The present invention also discloses a high-altitude escape backpack, including the rope retrievable descending device described in any one of the above, and the high-altitude escape backpack also includes:

Backpack, the descending device is installed in the backpack;

The strap is connected with the backpack and is used for binding on the user;

The embedded part is set on the building body and is used to connect the free end of the rope or the descending device.

In summary, the beneficial effects of the present invention are as follows:

1. By setting the first roller set and the second roller set, the rope is positioned to limit the position of the rope, ensuring the balance of the descending device, thereby improving safety.

2. By setting the shaft sleeve, the bending radius of the rope is increased, and the damage of the rope is reduced, especially for the steel rope, which also reduces the bending force of the rope, and the rope is retracted more smoothly;

3. By limiting the relationship between L1 and L2, the distance between the position where the rope is pulled out from the descending device and the user is controlled to reduce the user's inclination angle when descending, thereby ensuring the balance of the user when descending with the descending device ;

4. Set the centrifugal block to cooperate with the wheel hub. When the centrifugal block rotates with the main shaft through the guide rod, the centrifugal block will frictionally fit with the inner wall of the wheel hub under the action of centrifugal force, and then adjust the speed of the wheel hub during operation. The reliability is high and the slow down effect is good. , improve safety performance;

5. The main shaft is associated with the guide rod through the one-way clutch assembly to drive the guide rod to rotate in one direction. When the rope needs to be recovered, due to the characteristics of the one-way clutch assembly, the rotating power of the hub and the main shaft will not be transmitted to the guide rod. , thereby avoiding frictional contact between the rotation of the centrifugal block and the inner wall of the hub, ensuring the rotation speed of the hub when the rope is recovered, so that the rope can be recovered quickly, so that the descending device can be used repeatedly by multiple people, reducing the use cost and improving the promotion ability.

Description of drawings

Fig. 1 is a perspective view of Embodiment 1 of the present invention.

FIG. 2 is a perspective view from another angle of view of FIG. 1 .

FIG. 3 is a partial cross-sectional structural diagram of FIG. 1 .

Fig. 4 is a cross-sectional view of the centrifugal deceleration mechanism in Fig. 3 .

FIG. 5 is an enlarged view at point A in FIG. 4 .

Fig. 6 is a partial structural schematic diagram of the cooperation between the centrifugal block and the hub in Fig. 4 .

FIG. 7 is a schematic structural diagram of another embodiment of the first and second damping parts in FIG. 1 .

Fig. 8 is a projection view of the hub and the bushing in Fig. 1 on the same reference plane.

FIG. 9 is a schematic structural diagram of the transmission mechanism in FIG. 1 .

FIG. 10 is a cross-sectional view of the mount in FIG. 1 .

Fig. 11 is a perspective view of the hub in Fig. 1 .

Fig. 12 is a perspective view of the brake device installed on the slow descender in Fig. 1 .

Fig. 13 is a perspective view of the installation and driving mechanism of the slow descender in Fig. 1 .

FIG. 14 is an exploded view of FIG. 12 .

Fig. 15 is a schematic diagram of the moment arm of the braking device and the storage battery.

Fig. 16 is a schematic diagram of the moment arm of the braking device and the battery when the descender is in a tilted state.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

As shown in Figures 1-3, a high-altitude escape backpack includes a descending device 10, a strap for binding on the user and a backpack connected with the strap; the descending device 10 includes a fixed frame 11 and a hub 12 and a centrifugal deceleration mechanism 20; the fixed frame 11 is connected and fixed, and is connected with a backpack or a strap; the hub 12 is rotatably mounted on the fixed frame 11, and the hub 12 is set as a cylindrical structure for winding ropes; The centrifugal reduction mechanism 20 is associated with the hub 12 and used to limit the rotation speed of the hub 12 .

In the present embodiment, the knapsack and straps form a structure similar to a knapsack, and the descending device 10 is fixed in the knapsack, and the free end of the rope is pulled out from the knapsack, and the free end of the rope is connected with the rope grab installed on the building body; of course , in other embodiments, the braces can be directly connected with the descending device 10 to be used alone; in the specific operation of this embodiment, during the descending process of the user wearing the straps, the descending device 10 descends synchronously with the user.

Of course, in other embodiments, the slow descender 10 can be used separately from the strap, and the slow descender 10 is fixed on the embedded part of the building, and the strap is connected to the free end of the rope. , during the descending process of the user wearing the harness, the free end of the rope descends synchronously with the user.

3-5, in some embodiments, the centrifugal deceleration mechanism 20 includes a main shaft 21, a one-way clutch assembly 22, a guide rod 23, a centrifugal block 24 and an elastic member 25; On the fixed frame 11, and the axis of the main shaft 21 coincides with the centerline of the hub 12, the hub 12 rotates around the main shaft 21, and drives the main shaft 21 to rotate through the transmission mechanism 30; the centrifugal block 24 is provided with a plurality of Two centrifugal blocks 24 are arranged at intervals along the main shaft 21, and the centrifugal blocks 24 move towards the direction away from the main shaft 21 under the action of centrifugal force; one end of the guide rod 23 is pierced through the centrifugal block 24, so that the centrifugal block 24 can slide along the guide rod 23, and the guide rod The other end of 23 is connected with the main shaft 21 through the one-way clutch assembly 22, thereby driving the centrifugal block 24 to rotate; the same centrifugal block 24 is connected with two guide rods 23, so that the centrifugal block 24 will not be stuck during the sliding process, The operation is more stable; the elastic member 25 is set as a spring, sleeved on the guide rod 23, and located between the centrifugal block 24 and the one-way clutch assembly 22, the elastic member 25 is set to support the centrifugal block 24, so that the elastic member is in a static state The centrifugal block can be held up, so that the distance between the plurality of centrifugal blocks 24 and the main shaft 21 in the initial state is consistent, ensuring the synchronization of the position and state changes of the plurality of centrifugal blocks 24, and the centrifugal force exerted by the elastic member 25 and the centrifugal block 24 Working together to adjust the friction between the centrifugal block 24 and the hub 12; when the centrifugal block rotates with the main shaft, the centrifugal force on the centrifugal block can overcome the restoring force of the elastic member and contact the inner wall of the hub, thereby adjusting the rotating speed of the hub 12; And when the centrifugal block stops rotating, the centrifugal block returns to its initial position under the action of the spring restoring force.

When the main shaft 21 rotates, the one-way clutch assembly 22 drives the guide rod 23 to rotate, and then drives the main shaft 21 to rotate synchronously. The centrifugal block 24 leans against the inner wall of the hub 12 under the action of centrifugal force. The greater the centrifugal force, the greater the pressure between the centrifugal block 24 and the hub 12, and the greater the friction between it and the hub 12, so that the centrifugal block 24 decelerates the hub 12, so that the hub 12 keeps rotating at a constant speed; And the main shaft is associated with the guide rod 23 through the one-way clutch group 22 to drive the guide rod 23 to rotate in one direction. It will not be transmitted to the guide rod 23, thereby avoiding frictional contact between the rotation of the centrifugal block 24 and the inner wall of the hub 12, ensuring the rotation speed of the hub 12 when the rope is recovered, so that the rope can be recovered quickly, so that the descender 10 can be used repeatedly for multiple people. Reduce the cost of use and improve the promotion ability.

Certainly, in other embodiments, the one-way clutch assembly 22 may be a ratchet transmission mechanism, a one-way clutch or other one-way transmission mechanisms.

Preferably, the number of centrifugal blocks 24 in this embodiment is set to two, and the two centrifugal blocks 24 are arranged symmetrically with respect to the main shaft 21, and the two centrifugal blocks 24 compensate each other to achieve a better balance, and the deceleration effect is good.

4 and 5, in some embodiments, the inner wall of the hub 12 is provided with a first damping portion 121, the first damping portion 121 is a protruding ring formed on the inner wall of the hub 12 along the circumferential direction of the hub 12, the The cross-section of the first damping part 121 is set as an isosceles trapezoid; the second damping part 241 matched with the first damping part 121 is provided on the said centrifugal block 24, and the second damping part 241 is formed along the circumferential direction of the inner wall of the hub 12 In the arc groove on the outer periphery of the centrifugal block 24, the cross-section of the second damping portion 241 is also set as an isosceles trapezoid, and the minimum width of the second damping portion 241 is smaller than the minimum width of the first damping portion 121; the first damping portion The side wall of 121 is in frictional contact with the side wall of the second damping part 241 , which increases the contact area between the centrifugal block 24 and the inner wall of the hub 12 , and improves the deceleration effect of the centrifugal block 24 on the wheel hub 12 .

As shown in FIG. 5 , in some embodiments, the plane coincident with the axis of the hub is used as the first reference plane, and the first reference plane is used as the section of the centrifugal reduction mechanism. On this section, both sides of the first damping part 121 The included angle formed by the waist is α, and the included angle formed by the side walls on both sides of the second damping portion 241 is β, wherein β≤α≤1.2β; preferably, β≤α≤1.1β; optimally, β≤α ≤1.05β; ensure that the first damping part 121 is in close contact with the second damping part 241 to improve the damping effect; and limit the maximum value of α to prevent the first damping part 121 and the second damping part 24 under the same centrifugal force. Excessive clamping of the second damping part 241 leads to excessive friction between the two, avoiding the jamming phenomenon during the operation of the wheel hub 12, and ensuring that the wheel hub 12 can finally run at a constant speed after being decelerated by the centrifugal block 24. In this embodiment, β is set to 60°, correspondingly, 60°≤α≤72°; preferably, 60°≤α≤66°; optimally, 60°≤α≤63°.

As shown in FIG. 6 , in some embodiments, the plane coincident with the axis of the hub is used as the first reference plane, and the first reference plane is used as the section of the centrifugal reduction mechanism. On this section, the waist of the first damping part 121 The distance between the edge and the side wall of the second damping part is d, wherein 0≤d<3mm; preferably, 0≤d<2mm; optimally, 0≤d<1mm; so that the wheel hub 12 is in a static state or the rope is retracted In this state, there is a distance between the centrifugal block 24 and the inner wall of the wheel hub, so as to prevent the wheel hub from receiving the damping effect of the centrifugal block in the state of receiving the rope and affecting the speed of receiving the rope; A damping part quickly cooperates to ensure the corresponding speed.

Referring to FIG. 4 and FIG. 5 , in some embodiments, the second damping portion 241 is provided with an inner groove 242 toward one end of the main shaft 21 , the cross section of the inner groove 242 is set in a “U” shape, and communicates with the second damping portion 241 The inner groove 242 is set, when the first damping portion 121 is in close contact with the second damping portion 241, part of the air in the second damping portion 241 is pressed into the inner groove 242, preventing the air in the second damping portion 241 from being completely The negative pressure is formed by extrusion to suck the first damping part 121 and the second damping part 241 tightly, so as to ensure that the centrifugal block 24 can return to the original position under the action of the elastic member 25 after stopping the rotation.

Of course, referring to FIG. 7, in other embodiments, the first damping portion 121a is an annular groove formed on the inner wall of the hub 12a along the circumferential direction of the hub 12a, and the second damping portion 241a is formed on the centrifugal wall along the circumferential direction of the inner wall of the hub 12a. The arc block on the outer periphery of the block 24a, the side wall of the first damping part 121a is in frictional contact with the side wall of the second damping part 241a, which increases the contact area between the centrifugal block 24a and the inner wall of the hub 12a.

Referring to Fig. 3 and Fig. 4, in some embodiments, the one-way clutch assembly 22 is provided with two groups, and the two guide rods 23 connected to the same centrifugal block 24 correspond to the two sets of one-way clutch assemblies 22; The clutch assembly includes a one-way bearing 221 and a collar 222. The one-way bearing 221 is commercially available, and its structure will not be described in detail. The one-way bearing 221 is set on the main shaft 21, and the inner ring of the one-way bearing 221 It is connected with the main shaft 21 through a key to prevent rotation; the main shaft 21 is provided with a first enlarged diameter part 211, and the one-way bearings 221 of the two sets of one-way clutch assemblies 22 are symmetrically arranged on both sides of the first enlarged diameter part 211, thereby The one-way bearing 221 can be quickly positioned on the main shaft 21, and the assembly efficiency is high; the collar 222 is sleeved on the one-way bearing 221, and is connected with the outer ring of the one-way bearing 221 by a key to prevent rotation. 23 is screwed with the collar 222 toward the end of the collar 222; a one-way bearing 221 is set so that the main shaft 21 can only drive the collar 222 to rotate in one direction. The collar 222 rotates, and then the guide rod 23 drives the centrifugal block 24 to rotate, and the centrifugal block 24 presses against the inner wall of the wheel hub 12 to decelerate the wheel hub 12 under the action of centrifugal force; characteristics, the state of the collar 222 will not be affected by the main shaft 21, to ensure that the hub 12 will not be decelerated by the centrifugal block 24 when the rope is recovered, and to improve the efficiency of rope recovery.

Referring to FIG. 4 , in some embodiments, two collars 222 are respectively provided with baffles 223 at the ends away from the first enlarged diameter portion 211 , and screws 224 are used to sequentially install one of the baffles 223 , the two collars 222 and the other. The baffle plate 223 is fixed by a nut behind the baffle plate 223. When the two baffle plates 223 are fixed, the two collars 222 move synchronously to improve the stability of the centrifugal block 24; The inner diameter of the one-way bearing 221 is smaller than the outer diameter of the one-way bearing 221, so that the baffle 223 at least partially abuts against one end of the one-way bearing 221, so that the baffle 223 cooperates with the first enlarged diameter portion 211 to limit the one-way bearing 221.

Referring to FIG. 3 , in some embodiments, the hub 12 is provided with two support rings 13, and the support rings 13 are respectively installed on the main shaft 21 through bearings, so as to adapt to the working condition that there is a difference in speed between the main shaft 21 and the hub 12, And the two supporting rings 13 and the hub 12 enclose a cavity, and the centrifugal reduction mechanism 20 is installed in the cavity.

Referring to Fig. 3, Fig. 4 and Fig. 9, in some embodiments, the transmission mechanism 30 includes a ring gear 31, a planetary gear 32 and a sun gear 33; Integral structure; the planetary gear 32 is provided with a plurality, and the plurality of planetary gears 32 are arranged at intervals along the circumferential direction of the ring gear 31, and mesh with the ring gear 31 respectively, and the planetary gear 32 is installed on the fixed frame 11 through a connecting shaft above; the central gear 33 is sleeved on the main shaft 21, and is connected with the main shaft 21 through a key to prevent rotation, and the central gear 33 and a plurality of planetary gears 32 are meshed at the same time; the hub 12 rotates, and the power transmission through the transmission mechanism Drive the main shaft 21 to rotate, the rotation direction of the main shaft 21 is opposite to the rotation direction of the wheel hub 12, the main shaft 21 drives the centrifugal block 24 to rotate, and then the rotation direction of the centrifugal block 24 is opposite to the rotation direction of the wheel hub 12, so that the centrifugal block 24 acts on the wheel hub 12 deceleration effect.

Referring to FIG. 1 , in some embodiments, the fixed frame 11 includes two support plates 111 symmetrically arranged on both sides of the hub 12 and a plurality of connecting columns connecting the two support plates 111 respectively, so that the fixed frame 11 is arranged into two parts structure to facilitate the disassembly and assembly of the hub 12; specifically, the connecting columns include a first connecting column 1121 and a second connecting column 1122, and the support plate 111 is symmetrically provided with two first connecting columns near the direction of the rope exit of the hub 12 1121, the first connecting column 1121 not only plays the role of connecting, but also restricts the rope, so as to facilitate the winding of the rope; the support plate 111 is provided with a second connecting column 1122 in the direction away from the hub 12, and the second connecting The diameter of the column 1122 is larger than that of the first connecting column 1121, and the second connecting column 1122 can be hung on the embedded parts of the building body, so as to fix the descender 10, and the user connects the free end of the rope to descend.

1-3, in some embodiments, the fixed frame 11 is also provided with a guiding mechanism for guiding the rope, the guiding mechanism includes a first roller set 41 and a second roller set 42, the first The set of rollers 41 and the second set of rollers 42 are vertically arranged to locate the ropes; the first set of rollers 41 is composed of two first guide rollers 411 arranged in parallel, and a supply rail is provided between the two first guide rollers 411. The gap through which the rope passes; the second roller set 42 is composed of two second guide rollers 421 arranged in parallel, and a shaft sleeve 422 is rotatably sleeved on the second guide roller 421 for the rope to be wound, and the shaft sleeve Between 422 and another second guide roller 421, there is a gap for the rope to pass through. The outer diameter of the shaft sleeve 422 is greater than that of all the guide rollers, which increases the bending radius of the rope and reduces the damage of the rope. For steel The rope is especially obvious, and the bending force of the rope is also reduced, and the rope is retracted and released more smoothly.

Referring to FIG. 3 , in some embodiments, the plane coincident with the axis of the hub is used as the first reference plane, and the first reference plane is used as the section of the centrifugal reduction mechanism. On this section, the first guide on the side away from the user The distance between the axis of the roller and the support plate away from the user side is L1, the distance between the axis of the first guide roller away from the user side and the support plate near the user side is L2, wherein L1:L2 is 1: 1.5-1.8; preferably, L1:L2 is 1:1.6-1.7; optimally, L1:L2 is 1:1.72; by limiting the relationship between L1 and L2, the distance between the position where the rope is pulled out from the descent device and the user is controlled. The distance between them reduces the user's inclination angle when descending, thereby ensuring the balance when the user carries the descending device 10 when descending.

Referring to Fig. 8, in some embodiments, the diameter of the side plate 15 is set as D1, the diameter of the sleeve is set as D2, the plane perpendicular to the axis of the hub is used as the second reference plane, and the axis of the sleeve is at the second reference plane The projection point above is the first reference point C1, and the projection point of the hub axis on the second reference plane is the second reference point C2, where the length of the line connecting C1 and C2 is L3, (0.54-0.6)*(D1+ D2)>L3>0.5(D1+D2); preferred, (0.56-0.58)*(D1+D2)>L3>0.5(D1+D2); optimal, 0.57*(D1+D2)>L3> 0.5(D1+D2); while ensuring the bending radius of the rope, the distance between the guide mechanism and the hub 12 is reduced to make the structure compact, thereby reducing the overall space occupied by the descender 10.

Referring to FIG. 15 , in some embodiments, both ends of the second guide roller 421 are rotatably connected to the support plates 111 respectively, and the first guide roller 411 group is installed between the two support plates 111 through the mounting seat 412 . The mounting seat 412 is composed of two subsections 4121 of the same shape connected end to end, and is fixed by fastening screws. The first guide roller 411 is installed between the two subsections 4121, so that the second guide roller 421 and the first guide roller 411 is vertical to limit the position of the rope, and the first and second guide rollers are easy to install in this installation method.

Referring to Fig. 11 , in some embodiments, side plates 15 are installed on both sides of the hub 12, and the side plates 15 and the outer wall of the hub 12 form a wire groove, and the ropes are wound in the wire grooves to facilitate rope retraction. winding, and limit the rope wound on the hub 12; the hub 12 is also provided with a fixing groove 121 for fixing the end of the rope, so as to facilitate the fixed connection of the rope.

In some embodiments, the rope is made of steel wire, nylon, plastic or carbon fiber material, and the rope is wrapped with a fireproof layer or made of added fireproof material. The present embodiment is steel wire. The rope has been treated with fire prevention and can withstand high temperatures above 1000 degrees to improve safety.

Referring to FIG. 12 , in some embodiments, a backpack board 16 is installed on one side of the support board 111 , and the backpack board 16 is provided with a plurality of connection holes 161 that can be connected with a backpack or a strap, and the connection method is simple.

Referring to Fig. 12, in some embodiments, a brake device 51 is installed on the side support plate 111 away from the backpack board 16, and the brake device 51 is purchased, and its structure will not be described in detail. The brake device 51 and the side plate 15 Cooperate with the brake hub 12, so that after the user descends to a non-dangerous floor height, the brake device 51 can restrict the rotation of the hub 12, and then quickly escape. A storage battery 52 electrically connected to the braking device 51 is installed on the side support board 111 away from the backpack board 16 for powering the braking device 51 .

13 and 14, in some embodiments, a drive mechanism 60 associated with the main shaft 21 to drive the rotation of the main shaft 21 is installed on the side support plate 111 away from the backpack board 16, and then through the main shaft 21 through the transmission mechanism 30 Drive the wheel hub 12 to rotate to recover the rope, so that the slow descender 10 returns to the initial state, which is convenient for reuse; the driving mechanism 60 includes a first bevel gear 61, a second bevel gear 62, a transmission case 63, a motor 64 and a motor seat 65 The first bevel gear 61 is sheathed on the main shaft 21, and is connected with the main shaft 21 through a key to prevent rotation; the second bevel gear 62 meshes with the first bevel gear 61 and is connected to the output shaft of the motor 64; The outer diameter of the first bevel gear 61 is larger than the outer diameter of the second bevel gear 62, so that the main shaft 21 obtains a higher rotational speed and ensures the efficiency of the hub 12 to recover the rope; the transmission case 63 is installed on the support plate 111, And it is surrounded by the support plate 111 to form a transmission chamber, the first and second bevel gears are protected, and the output shaft of the motor 64 at least partially extends into the transmission chamber and is connected with the second bevel gear 62; the motor seat 65 is installed on The support plate 111 is used to fix the motor 64 ; the battery 52 is mounted on the support plate 111 or the motor 64 , and the battery 52 supplies power to the braking device 51 and the motor 64 respectively.

Referring to FIG. 15 , in some embodiments, the mass of the battery 52 is set to m1, the mass of the braking device 51 is set to m2, and the plane perpendicular to the axis of the hub 12 is used as the second reference plane, so as to intersect and be perpendicular to the axis of the hub 12 The straight line is the first reference line R1, the projection point of the center of the smallest spherical surface that can completely cover the storage battery 52 on the second reference plane is E1, and the vertical distance from E1 to the first reference line R1 is L4, so that it can completely cover the storage battery 52. The projection point of the center of the smallest spherical surface of the braking device 51 on the second reference plane is E2, and the vertical distance from E2 to the first reference line R1 is L5, wherein m1*L4=(0.8-1.2)m2*L5, preferably , m1*L4=(0.9-1.1)m2*L5, optimally, m1*L4=m2*L5; by setting the installation positions of the storage battery 52 and the braking device 51, the storage battery 52 and the braking device 51 are deviated from the axis of the hub 12 The generated moments cancel each other out to improve the overall balance of the descender.

Referring to Fig. 16, when the whole descender is in an inclined state, take the plane passing through the main axis R0 and set vertically as the third reference plane, so that the center of the smallest spherical surface that can completely cover the battery 52 is on the third reference plane The projection point is E3, the projection point of the center of the smallest spherical surface that can completely cover the braking device 51 on the third datum plane is E4, and the intersection point of the projection of the hub axis on the third datum plane and the line E3E4 is E5, Take the horizontal straight line passing through E5 as the second reference line R2, the vertical distance from E3 to the second reference line R2 is L6, and the vertical distance from E4 to the second reference line R2 is L7, where m1*L6=(0.8-1.2) m2*L6, preferably, m1*L6=(0.9-1.1) m2*L7, optimally, m1*L6=m2*L7; by setting the installation positions of the storage battery 52 and the braking device 51, adjust the slow descender in use The inclination angle of time, and improve the overall balance of the descending device.

The implementation methods described above do not constitute a limitation to the scope of protection of the technical solution. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above implementation methods shall be included in the protection scope of the technical solution.

Claims

A rope retractable descending device, characterized in that: comprising

Fixing frame (11);

The hub (12) is rotatably mounted on the fixed frame (11) and is used for winding the rope;

A fixing groove (121) is provided on the hub (12) for fixing the end of the rope;

A guide mechanism for guiding the rope is arranged on the fixed frame (11), and the guide mechanism includes a first roller set (41) and a second roller set (42), and the first roller set (41) and the second roller set (41) The two roller groups (42) are vertically arranged; the first roller group (41) is composed of two parallel first guide rollers (411); the second roller group (42) is composed of two parallel first guide rollers (411); Two guide rollers (421) are constituted, and the second guide roller (421) for rope winding is rotatably sleeved with an axle sleeve (422); the plane coincident with the axis of the hub is used as the first datum plane, and the first The reference plane is used as the section of the centrifugal deceleration mechanism. On this section, the distance between the axis of the first guide roller (411) on the side away from the user and the inner wall of the fixed frame (11) on the side away from the user is L1. The distance between the axis of the first guide roller (411) on the user's side and the inner wall of the fixing frame (11) near the user's side is L2, wherein L1:L2 is 1:1.5-1.8.
A kind of rope retrievable descending device according to claim 1, characterized in that: the two sides of the hub (12) are provided with side plates (15); The side plate (15) cooperates with the brake hub (12) to obtain a brake device (51); the fixed frame (11) is provided with a battery (50) for powering the brake device (51).
The rope retrievable descending device according to claim 1, characterized in that it further comprises a centrifugal deceleration mechanism (20) associated with the hub (12) to limit the rotation speed of the hub (12) The centrifugal deceleration mechanism (20) includes a main shaft (21) passing through the hub (12) and rotatably mounted on the fixed frame, a plurality of guide rods (23) arranged along the circumferential direction of the main shaft (21) , the centrifugal block (24) that is slidably sleeved on the guide rod (23), the hub (12) drives the main shaft (21) to rotate through the transmission mechanism (30); when the main shaft (21) drives the guide rod (23) When rotating, the centrifugal block (24) is frictionally fitted with the inner wall of the hub (12) under the action of centrifugal force; the fixed frame is also provided with a driving mechanism associated with the main shaft (21) to drive the main shaft (21) to rotate ( 60), the driving device (60) includes a transmission case (63) arranged on the fixed frame (11), a first bevel gear 61 arranged in the transmission case (63) and locked in rotation with the main shaft (21) , the second bevel gear (62) that is located in the transmission case (63) and engages with the first bevel gear (61), the motor (64) that is used to drive the second bevel gear (62) to rotate, and the motor (64 ) is installed on the fixed frame (11) through the motor base (65).
A kind of rope retrievable descending device according to claim 3, characterized in that: the main shaft (21) is associated with the guide rod (23) through a one-way clutch assembly (22) to drive the guide rod (23) One-way rotation; the one-way clutch assembly (22) includes a one-way bearing (221) sleeved on the main shaft (21) and a collar (222) sleeved on the one-way bearing (221), the The inner ring of the one-way bearing (221) is locked in cooperation with the main shaft (21), and the outer ring of the one-way bearing (221) is locked in cooperation with the collar (222), and the guide rod (23) faces the main shaft (21 ) one end links to each other with collar (222).
A kind of rope retrievable type descending device according to claim 4, characterized in that: the one-way clutch assembly (22) is provided with two groups, and two guides are matched with the same centrifugal block (24). Rod (23), two guide rods (23) correspond to two sets of one-way clutch assemblies (22) one by one; The one-way bearings (221) of the clutch assembly (22) are symmetrically arranged on both sides of the first enlarged diameter part (211);
The rope retrievable descending device according to claim 5, characterized in that: the end of the collar (222) away from the first enlarged diameter part (211) is provided with a baffle (223), and the screw/bolt is used to Pass through one of the baffles (223), two collars (222) and the other baffle (223) in sequence and then be fixed by bolts; and/or the guide rod (23) is sleeved with an elastic member (25) , one end of the elastic member (25) is connected to the outer circumference of the collar (222), and the other end is connected to the centrifugal block (24).
A kind of rope retractable descending device according to claim 1, characterized in that: side plates (15) are arranged on both sides of the hub (12); the diameter of the side plates (15) is set to D1, The diameter of axle sleeve (422) is set as D2, with the plane perpendicular to the hub (12) axis as the second datum plane, with the projection point of the axle sleeve (422) axis on the second datum plane as the first reference point C1, Take the projection point of the hub (12) axis on the second datum plane as the second datum point C2, and take the length of the line connecting C1 and C2 as L3, where (0.54-0.6)*(D1+D2)>L3>0.5( D1+D2).
A kind of rope recyclable descending device according to claim 2, characterized in that: the mass of the battery (52) is set to m1, and the mass of the braking device (51) is set to m2, so as to be perpendicular to the hub (12 ) axis plane is the second datum plane, and the straight line intersecting with the hub (12) axis and vertical is the first datum line R1, so that the center of the smallest spherical surface that can completely cover the storage battery (52) is on the second datum plane The projected point of E1 is E1, the vertical distance from E1 to the first datum line R1 is L4, and the projected point on the second datum plane is E2 with the center of the smallest spherical surface that can completely cover the braking device (51), and E2 is to the first datum line The vertical distance of the reference line R1 is L5, where m1*L4=(0.8-1.2)m2*L5; and/or when the descender is in a tilted state as a whole, the third reference is the plane that passes through the axis of the main shaft and is set vertically surface, the projection point of the center of the smallest spherical surface that can fully cover the storage battery (52) on the third datum plane is E3, and the center of the smallest spherical surface that can completely cover the braking device (51) on the third reference plane The projection point is E4, the intersection point of the projection of the axis of the hub (12) on the third datum plane and the line E3E4 is E5, and the horizontal straight line passing through E5 is the second datum line R2, and the distance from E3 to the second datum line R2 The vertical distance is L6, and the vertical distance from E4 to the second reference line R2 is L7, wherein m1*L6=(0.8-1.2)m2*L6.
A kind of rope retrievable type descending device according to claim 3, characterized in that: the transmission mechanism includes a ring gear (31) arranged on the inner wall of the hub (12), a plurality of ring gears ( 31) Engaged planetary gears (32), sun gears (33) sheathed on the main shaft (21) and locked in rotation with the main shaft (21), the sun gears (33) and a plurality of planetary gears (32) Engage simultaneously.
A high-altitude escape backpack, characterized in that it includes the rope retrievable descending device according to any one of claims 1-8, and the high-altitude escape backpack also includes:

Backpack, the descending device is installed in the backpack;

The shoulder strap is connected with the backpack and is used for binding on the user.

The embedded part is set on the building body and is used to connect the free end of the rope or the descending device.