CN212941039U

CN212941039U - Rope access structure and movable descending equipment

Info

Publication number: CN212941039U
Application number: CN202021333278.8U
Authority: CN
Inventors: 璩红宝; 唐树龙
Original assignee: Saikaer Beijing Industrial Technology Co ltd
Current assignee: Saikaer Beijing Industrial Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-04-13
Anticipated expiration: 2030-07-03

Abstract

The application provides a rope access structure for portable descending equipment, rope access structure includes the direction subassembly, the direction subassembly be used for with the rope with sliding friction between the casing of portable descending equipment turns into the rope with rolling friction between the direction subassembly. The rope structure of cominging in and going out of this application has avoided the excessive wearing and tearing problem that causes of direct friction between rope and the casing rope access & exit, very big promotion the life of portable descending equipment. Meanwhile, the requirement for the weight difference between the overhead workers and the rope is reduced, a longer rope can be added into the movable descending equipment, and the maximum descending height of the equipment is indirectly improved.

Description

Rope access structure and movable descending equipment

Technical Field

The invention relates to the technical field of aerial work, in particular to a rope access structure and movable descending equipment.

Background

The movable descending equipment is a tool for helping high-altitude operators to quickly and stably descend to the ground or a safety zone, the rope is used as an important component of the movable descending equipment, and the weight of the rope is difficult to obviously reduce in order to ensure the strength of the rope under the existing material technology and economic conditions; with the increase of the modern building level, the maximum use height of the mobile descending equipment needs to be continuously lifted, so that the length of the matched rope is increased, and the weight is increased correspondingly.

However, in the prior art, when the mobile descending equipment runs, the friction between the rope and the rope opening of the equipment is too concentrated, and the friction force is increased along with the increase of the weight of the rope, so that the rope opening of the equipment and the rope are excessively worn, and the service life is shortened. In addition, the weight range of most high-altitude operators is generally between 50kg and 100kg, when the maximum using height of the descending equipment exceeds a certain height, the length of the suspended part of the rope at the entrance end is extremely long, the weight of the rope is further increased, so that the weight difference between the high-altitude operators and the rope is reduced, and the descending equipment is difficult to start or even cannot descend due to the influence of the friction force, so that the high-altitude operators are directly suspended at the high altitude, the descending or emergency escape fails, and serious consequences such as casualties are caused.

Therefore, a brand-new rope in-and-out structure is developed, the concentration of the friction force between the rope and the rope opening of the movable descending equipment is avoided, the useless friction between the rope and the rope opening of the descending equipment is reduced or eliminated, and the rope in-and-out structure has positive practical significance for solving the problems.

Disclosure of Invention

To solve the above technical problems, the present application provides a rope access structure and a mobile descending device.

In a first aspect, the present application provides a rope access structure for a mobile descending device, the rope access structure comprising a guide component for converting sliding friction between the rope and a housing of the mobile descending device into rolling friction between the rope and the guide component.

In one embodiment according to the first aspect, the guide assembly comprises:

a limiting block arranged on the shell;

two guide wheels which are arranged at the positions of the limiting blocks close to the rope wheel of the movable descending equipment,

a positioner arranged at the edge position of the limit block,

wherein an introduction port for introducing a rope is formed between the positioner and the sheave, one of the guide wheels forms a first stopper portion for restricting the movement path of the rope, and the other guide wheel forms a second stopper portion for restricting the discharge path of the rope.

In one embodiment according to the first aspect, the stopper is configured in an arc shape conforming to a shape of a bottom of a casing of the mobile descending device.

In one embodiment according to the first aspect, the rope access structure further comprises a rope distributor disposed between the two guide wheels for separating the entry section and the exit section of the rope.

In one embodiment according to the first aspect, the guide wheel comprises a guide shaft, a bearing, and a guide wheel, the bearing is fitted over the guide shaft, the guide wheel is fitted over the bearing,

the rope is in contact with the guide wheel, and the rope moves to drive the guide wheel to rotate.

In one embodiment according to the first aspect, the positioner comprises a positioning shaft and a sleeve sleeved on the positioning shaft, and the sleeve can rotate around the central axis of the positioning shaft.

In a second aspect, the present application provides a mobile descending device comprising a rope access arrangement of the first aspect.

In one embodiment according to the second aspect, the rope wheel, the transmission assembly and the brake assembly are further included, and the transmission assembly is respectively connected with the rope wheel and the brake assembly and used for braking the rope wheel through the brake assembly.

In one embodiment according to the second aspect, the transmission assembly includes a gearwheel and a pinion engaged with the gearwheel, and an axle of the pinion extends outward until penetrating into the brake assembly and is fixedly connected with the brake assembly.

In one embodiment according to the second aspect, the number of the braking assemblies is a plurality of groups, and the plurality of groups of the braking assemblies are evenly distributed around the circumference of the gearwheel.

Compared with the prior art, the method has the following advantages:

the rope discrepancy structure of this application turns into the rope with the slip friction between the casing of portable descending equipment the rope with rolling friction between the direction subassembly has avoided the excessive wearing and tearing problem that the direct friction between rope and the casing rope access & exit caused, very big promotion portable descending equipment's life. Meanwhile, because the friction between the rope and the rope inlet and outlet of the shell is effectively reduced, the starting load of the movable descending equipment is further reduced, the requirement on the weight difference between high-altitude operation personnel and the rope is reduced, the movable descending equipment can be added with a longer rope, and the maximum descending height of the equipment is indirectly improved.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 shows a mobile descending device one according to the present application.

Figure 2 shows a second mobile descending device according to the present application.

Fig. 3 is a first schematic structural diagram of the mobile descending device shown in fig. 1 or fig. 2 after a brake chamber shell is removed.

Fig. 4 is a schematic structural diagram ii of the mobile descending device shown in fig. 1 or fig. 2 after the brake chamber shell is removed.

Fig. 5 is a schematic view of the mobile descending device of fig. 4 with the brake assembly removed.

Fig. 6 is a schematic view of the structure of a brake assembly in the mobile descending device of fig. 1.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

2-a brake assembly; 3-rope wheels; 5-a rope;

11-brake chamber shell; 12-a drive housing; 111-brake chamber cover; 121-a transmission bin cover;

21-a centrifuge base; 22-a centrifugal mass; 23-friction plate;

41-bull gear; 42-pinion gear; 421-axle;

5A-a lead-in terminal; 5B-a leading-out end;

61-a limiting block; 621, 622-guide wheels; 63-a positioner; 65-a rope separator; 621A, 622A-guide shaft; 621B, 622B-bearing; 621C, 622C-guide wheel;

a-an introduction port.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1-4 show an embodiment of a rope access structure according to the present application applied to a mobile descending device comprising a machine housing forming a brake chamber housing 11 for housing a brake assembly 2 and a drive chamber housing 12 for housing a rope sheave 3 and a drive assembly. The transmission assembly is respectively connected with the rope wheel 3 and the braking assembly 2 so as to control the rotation speed of the rope wheel 3 through the braking assembly 2 and further control the moving speed of the rope 5.

As shown in fig. 3 and 4, the rope access structure includes a guide assembly for converting sliding friction between the rope 5 and the cabinet of the mobile descending device into rolling friction between the rope 5 and the guide assembly.

Specifically, the guide assembly includes a stopper 61, two

guide wheels

621, 622, and a retainer 63. The stopper 61 is provided on the casing, and the stopper 61 is preferably constructed in an arc shape conforming to the shape of the bottom of the casing. Two

guide wheels

621 and 622 are disposed on the stopper 61 at positions close to the sheave 3, and the retainer 63 is disposed at an edge position of the stopper 61.

An introduction port a for introducing the rope 5 is formed between the positioner 63 and the sheave 3, a first stopper portion for restricting a movement path of the rope 5 is formed around one of the guide wheels 621, and a second stopper portion for restricting a lead-out path of the rope 5 is formed around the other guide wheel 622. The rope 5 enters from the inlet a, is wound around the guide pulley 621 from the side of the guide pulley 621 close to the edge of the housing, then enters from the gap between the guide pulley 621 and the sheave 3, is wound around the sheave 3, finally is wound out from the gap between the guide pulley 622 and the sheave 3, and finally is led out of the housing around the guide pulley 622. It should be noted that, when the rope 5 is naturally and vertically descended, the leading-out end 5B of the rope 5 is vertical, and the rope 5 finally goes out of the casing after approximately 1/4 circles around the guide wheel 622; when the upper and lower ends of the line are fixed, the descender can be lowered down the inclined line, the leading-out end 5B of the line 5 is not vertical, and the line 5 can be led out around 1/4 circumference larger than the guide pulley 622. In short, the rope entry/exit state of the rope entry/exit structure of the present application changes according to the actual descending state of the worker.

Thus, the stopper 61, the

guide wheels

621 and 622, and the retainer 63 form a passage for allowing the rope 5 to smoothly go in and out on the mobile descending device, i.e., the rope going-in and going-out structure.

As shown in fig. 5, the rope entrance and exit structure further includes a rope separator 65 disposed between the two

guide wheels

621, 622 for separating the entrance section and the exit section of the rope 5. The rope distributor 65 shown in fig. 5 is fixed, and in practical use, the rope distributor 65 may be a roller type. Whether stationary or roller, are well known to those skilled in the art and will not be described in further detail herein.

The guide wheel 621 comprises a guide shaft 621A, a bearing 621B and a guide wheel 621C, the bearing 621B is sleeved on the guide shaft 621A, the guide wheel 621C is sleeved on the bearing 621B, the rope 5 is in contact with the guide wheel 621C, and the rope 5 moves to drive the guide wheel 621C to rotate. Similarly, the guide wheel 622 includes a guide shaft 622A, a bearing 622B and a guide wheel 622C, the bearing 622C is disposed on the guide shaft 622A, the guide wheel 622C is disposed on the bearing 622B, the rope 5 contacts with the guide wheel 622C, and the rope 5 moves to drive the guide wheel 622C to rotate.

Referring again to fig. 3, the positioner 63 includes a positioning shaft 631, and a sleeve 632 disposed on the positioning shaft 631, wherein the sleeve 632 can rotate around the central axis of the positioning shaft 631.

Referring to fig. 5 and 6, the transmission assembly includes a large gear 41, and a small gear 42 engaged with the large gear 41, the large gear 41 being disposed coaxially with the sheave 3. The wheel shaft 421 of the pinion gear 42 extends outward to penetrate through the brake assembly 2 and is fixedly connected with the brake assembly 2. Wherein, the quantity of braking subassembly 2 can be multiunit, and to a certain extent, the quantity of braking subassembly 2 is more, and the braking effect is better. In this embodiment, the number of the braking units 2 is 3, and the braking units 2 are evenly distributed around the circumference of the large gear 41.

The specific structure of the housing and how it cooperates with the various components described above will now be described. The brake chamber shell 11 and the transmission chamber shell 12 are respectively provided with a corresponding brake chamber cover 111 and a corresponding transmission chamber cover 121, and the brake chamber cover 111 and the transmission chamber cover 121 are fixedly connected with the machine shell through bolts. The centers of the brake chamber cover 111 and the transmission chamber cover 121 are respectively provided with shaft holes for mounting the wheel shaft 421 of the pinion gear 42 and the wheel shaft of the bull gear 41. The rope wheel 3 is sleeved on the wheel shaft of the big gear 41 and is fixedly connected with the wheel shaft through a pin.

As shown in fig. 6, the brake assembly 2 includes a centrifugal seat 21, a centrifugal block 22 embedded in the centrifugal seat 21 (a friction plate 23 is fixed on the periphery of the centrifugal block 22), and an extension spring (not shown in the figure, which is inserted into a slot 24 and connected end to form a closed loop, similar to the extension spring, for binding the centrifugal block 22). When the rotating speed is high enough, the centrifugal block 22 overcomes the pulling force of the extension spring 24 to open and gradually move outwards under the action of centrifugal force, the friction plate 23 bonded on the centrifugal block 22 gradually rubs with the friction bin on the inner wall of the shell, and the friction force adversely affects the rotating speed of the centrifugal block 22, so that the rotating speed of the rotating shaft 421 is reduced, and then the rotating speeds of the pinion gear 42, the bull gear 41 and the rope pulley 3 are reduced. When the rotating speed is reduced to a certain degree, the friction force does work to just offset the gravitational potential energy of the person falling, and the uniform falling is realized.

When the movable descending equipment is used as an aerial quick-descending escape device, the leading-out end 5B of the rope 5 is connected with an anchor point arranged in the high altitude, the suspension hole 7 on the machine shell is connected with a safety belt of an aerial worker, when the aerial worker jumps down, the movable descending equipment starts descending, in the process, the rope 5 drives the rope pulley 3 to rotate, the rope pulley 3 then drives the large gear 41 which is coaxially arranged to rotate, the large gear 41 then drives the small gear 42 which is meshed with the large gear to rotate, and the wheel shaft of the small gear 42 is fixedly connected with the braking assembly 2, so that the rotating speed of the small gear 42 is controlled by the braking assembly 2, and the descending speed of the movable descending equipment is quickly reduced. It can be understood that, in order to reduce the descending speed to a safe range of 0.5-2m/s in about 0.2 second, (a person skilled in the art can adjust the weight of the centrifugal block, the friction coefficient of the tension spring or the friction block according to needs, and thus adjust the descending speed at a constant speed) so as to ensure the safe descending of the operator.

The rope discrepancy structure of this application turns into the rope and the rolling friction between the direction subassembly with the slip friction between the casing of rope and portable descending equipment, has avoided the excessive wearing and tearing problem that the direct friction between rope and the casing rope access & exit caused, very big promotion portable descending equipment's life. Meanwhile, because the friction between the rope and the rope inlet and outlet of the shell is effectively reduced, the starting load of the movable descending equipment is further reduced, the requirement on the weight difference between high-altitude operation personnel and the rope is reduced, the movable descending equipment can be added with a longer rope, and the maximum descending height of the equipment is indirectly improved.

In addition, it should be noted that the suspension holes of the existing high-altitude rescue equipment or descending equipment are arranged at the top, the suspension holes arranged at the top are connected with the high-altitude anchor points, one end of the rope is connected with the safety belt of the high-altitude operation personnel, after the operation personnel start to descend, the rope can move through the rope pulley, and only one person can descend along with the rope after the rope descends. The suspension hole 7 of the mobile descending equipment is positioned at the lower end of the equipment, so that multiple people can be suspended by one piece of equipment, namely, the safety of high-altitude operation of multiple people can be simultaneously protected by one piece of mobile descending equipment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A rope access structure for a mobile descending device, the rope access structure comprising a guide assembly for converting sliding friction between the rope and a housing of the mobile descending device into rolling friction between the rope and the guide assembly.

2. A cord access arrangement as recited in claim 1, wherein said guide assembly comprises:

a limiting block arranged on the shell;

a positioner arranged at the edge position of the limit block,

3. The rope access structure of claim 2, wherein the stopper is configured in an arc shape conforming to the shape of the bottom of the housing of the mobile descending device.

4. A cord access arrangement as claimed in claim 2 or 3, further comprising a cord dispenser arranged between said two guide wheels for separating an entry section and an exit section of said cord.

5. A rope entrance and exit structure according to claim 2 or 3, wherein said guide pulley comprises a guide shaft, a bearing fitted over said guide shaft, and a guide pulley fitted over said bearing,

6. A cord access arrangement as claimed in claim 2 or claim 3, wherein said locator includes a locating shaft and a sleeve mounted on said locating shaft, said sleeve being rotatable about a central axis of said locating shaft.

7. A mobile descending device comprising a rope access structure according to any of claims 1 to 6.

8. The mobile descending device of claim 7 further comprising a sheave, a transmission assembly and a brake assembly, the transmission assembly connecting the sheave and the brake assembly, respectively, for braking the sheave via the brake assembly.

9. The mobile descending device of claim 8 wherein the transmission assembly includes a bull gear and a pinion gear engaged with the bull gear, the pinion gear extending laterally outwardly through the brake assembly and fixedly connected thereto.

10. The mobile descending device of claim 9 wherein the number of brake assemblies is in groups and the groups of brake assemblies are evenly distributed around the circumference of the bull gear.