Descent control device and descent control system

Abstract

The utility model relates to the technical field of rescue equipment, and provides a descent control device and a descent control system.The descent control device comprises a shell assembly, a speed limiting device and a rope wheel assembly, the speed limiting device comprises a transmission shaft and at least one speed limiting assembly, the transmission shaft is rotatably arranged in a containing cavity, and each speed limiting assembly comprises a positioning part, an elastic element and at least two friction parts; the positioning part is fixedly connected with the transmission shaft, the elastic element sleeves the outer circumferential surface of the positioning part, the at least two friction parts are arranged at intervals along the circumference of the positioning part, each friction part is embedded in the elastic element, and the elastic element rotates along with the positioning part so as to expand under the action of centrifugal force. The friction part is driven to abut against the cavity wall of the containing cavity so as to achieve friction speed reduction. The rope wheel assembly is in transmission fit with the transmission shaft. The descent control device can operate continuously and stably, and the problems that the descent control device is prone to clamping stagnation and poor in operation stability in the operation process can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rescue equipment, in particular to a descender and a descent system. Background Art

[0002] Existing engineering construction, wind power generation, ship hoisting, communication construction, bridge construction and other fields all involve high-altitude operations. Since accidents of accidental falling from high altitude are likely to occur during high-altitude operations. Therefore, in order to protect the safety of climbers, a descender is equipped for escape or rescue. When encountering dangerous situations and unable to quickly evacuate through elevators or climbing equipment, one can descend from a higher position to a safe position through the descender.

[0003] In related technologies, such as a friction device of a life-saving descender (publication number: CN203280927U), the friction device is formed by pasting and extruding friction plates onto the steel back of a centrifugal block, and the steel backs of the centrifugal blocks with the pasted friction plates are connected together by a tension spring. The centrifugal force is transmitted through a brake shaft to make the centrifugal blocks push the friction plates to separate outwards. After the friction plates contact the inner wall of the housing, frictional resistance is generated to limit the rotation speed of the rope wheel.

[0004] Although the above structure can limit the rotation speed of the rope wheel through frictional resistance, the friction plates are pasted and extruded onto the steel back of the centrifugal block, which is easily affected by the environment (such as environmental factors like high temperature, low temperature or soaking in water, etc.) and causes delamination, so that the descender is prone to jamming during operation and the operation stability is not good. Summary of the Utility Model

[0005] The first aspect of the utility model provides a descender to solve the above technical defects in the prior art. The descender can operate continuously and stably, and can effectively avoid the problem that the friction plates are pasted and extruded onto the steel back of the centrifugal block, which is easily affected by the environment and causes delamination, so that the descender is prone to jamming during operation and the operation stability is not good.

[0006] The second aspect of the utility model provides a descent system.

[0007] The first aspect of the utility model provides a descender, which includes a housing assembly, a speed limiting device and a rope wheel assembly.

[0008] The housing assembly is suitable for being hung on an anchoring point, and an accommodation cavity is constructed inside the housing assembly.

[0009] The speed-limiting device is located in the accommodating cavity. The speed-limiting device includes a transmission shaft and at least one set of speed-limiting components. The transmission shaft is rotatably arranged in the accommodating cavity. The speed-limiting component includes a positioning part, an elastic element, and at least two friction parts. The positioning part is fixedly connected to the transmission shaft. The elastic element is sleeved on the outer circumferential surface of the positioning part. At least two of the friction parts are arranged at intervals along the circumference of the positioning part. Each friction part is embedded in the elastic element. The elastic element rotates with the positioning part and expands under the action of centrifugal force, driving the friction part to abut against the cavity wall of the accommodating cavity to achieve frictional deceleration.

[0010] The rope wheel assembly is located in the accommodating cavity. The rope wheel assembly is in transmission cooperation with the transmission shaft.

[0011] For the descender provided by the present utility model, each friction part includes a friction element and a support element; mounting grooves are symmetrically arranged on both sides of the friction element. The support element is arranged in the mounting groove. The support element is detachably connected to the friction element through a connecting part. The elastic element is located between the friction element and the support element.

[0012] For the descender provided by the present utility model, the friction element includes a friction main body and a support part; the support part is vertically connected to the friction main body. The support element is detachably connected to the support part through a connecting part. The elastic element is located between the support part and the support element; the surface of the friction main body facing away from the support part is adapted to abut against the cavity wall of the accommodating cavity to achieve frictional deceleration.

[0013] For the descender provided by the present utility model, the connecting part includes a connecting piece and a fastening piece. One end of the connecting piece forms a flange. The other end of the connecting piece passes through the friction element and the support element. The fastening piece is connected to the end of the connecting piece that passes through to detachably connect the friction element and the support element.

[0014] For the descender provided by the present utility model, the positioning part includes a positioning element and a stop piece. The positioning element includes a positioning main body and a limiting part. The limiting part is arranged at one end of the positioning main body; the elastic element and at least two of the friction parts are arranged along the outer circumference of the positioning main body. The stop piece is fixedly arranged at the end of the positioning main body away from the limiting part.

[0015] For the descender provided by the present utility model, the rope wheel assembly includes a rope wheel body, a transmission gear, and a working rope. The transmission gear is meshed with the transmission shaft. The rope wheel body is fixed to the transmission gear. The working rope is wound around the rope wheel body. Both ends of the working rope extend out of the housing assembly respectively.

[0016] According to the descender provided by the present utility model, the housing assembly includes a first housing and a second housing which are oppositely arranged, the first housing and the second housing are fixedly connected, and the first housing and the second housing enclose to form the accommodating cavity; at least one of the first housing and the second housing is adapted to be hung on an anchoring point.

[0017] The descender provided by the present utility model further includes a hook assembly, a handwheel and an anti-rotation assembly. The hook assembly is arranged on the housing assembly and is adapted to be hung on an anchoring point. The handwheel is fixedly connected to the transmission shaft. The anti-rotation assembly is arranged on the housing assembly and is adapted to limit the retraction of the working rope.

[0018] According to the descender provided by the present utility model, the hook assembly includes a hook body and a connecting body. The connecting body includes a first connecting portion and a second connecting portion. The first connecting portion can rotate circumferentially relative to the second connecting portion; the hook body is arranged on one of the first connecting portion and the second connecting portion, and the other of the first connecting portion and the second connecting portion is connected to the housing assembly.

[0019] The second aspect of the present utility model provides a descender system, which includes a safety belt and the descender according to any one of the above items. The safety belt is connected to the working rope of the descender.

[0020] In the descender provided by the present utility model, a speed-limiting assembly is formed by arranging a positioning member, an elastic element and at least two friction members. The positioning member is fixedly connected to the transmission shaft. The elastic element is sleeved on the outer circumferential surface of the positioning member. At least two friction members are arranged at intervals along the circumferential direction of the positioning member. At least two friction members are embedded in the elastic element, that is, the elastic element is located between the friction member and the positioning member; the elastic element can rotate with the transmission shaft, and expand under the action of centrifugal force to push the friction member against the wall of the accommodating cavity, thereby realizing friction deceleration.

[0021] By improving the structure of the friction member, the friction member is integrally embedded on the elastic element. When the elastic element rotates at a high speed with the transmission shaft and expands outward under the action of centrifugal force, the elastic element pushes the friction member against the wall of the accommodating cavity to realize friction deceleration. The braking force generated by the friction member acts on the transmission shaft in the reverse direction, so as to decelerate the transmission shaft, and then decelerate the rope wheel assembly, realizing the constant-speed descent of the descender. With such a setting, since the friction member as a whole participates in the friction action as a deceleration unit, the structure has a large volume and weight, and a large inertia, and can operate continuously and stably. It can effectively avoid the problem that the friction plate is pasted and extruded onto the steel back of the centrifugal block, and is easily affected by the environment (such as environmental factors such as high temperature, low temperature or soaking in water) and causes the problem of glue opening, so that the descender is prone to jamming during operation and the operation stability is poor.

[0022] Compared with the speed-limiting device in the related art, the speed-limiting component provided by the embodiment of the present invention can increase the contact area between the friction component and the cavity wall of the accommodating cavity, thereby increasing the frictional force between the friction component and the cavity wall of the accommodating cavity, so that the stability of the speed-limiting component is better.

[0023] The descent speed control system provided by the present invention includes the above-mentioned descent speed controller, so it has all the above advantages. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural view of the descent speed controller provided by the embodiment of the present invention.

[0026] Figure 2 It is a side view of the descent speed controller provided by the embodiment of the present invention.

[0027] Figure 3 It is Figure 2 a cross-sectional view taken along line A-A in

[0028] Figure 4 It is a front view of the speed-limiting component in the descent speed controller provided by the embodiment of the present invention.

[0029] Figure 5 It is Figure 4 a cross-sectional view taken along line B-B in

[0030] Figure 6 It is a side view of the speed-limiting component in the descent speed controller provided by the embodiment of the present invention.

[0031] Figure 7 It is an exploded schematic structural view of the friction component in the descent speed controller provided by the embodiment of the present invention.

[0032] Figure 8 It is a cross-sectional view of the friction component in the descent speed controller provided by the embodiment of the present invention.

[0033] Figure 9 It is a schematic structural view of the hook component in the descent speed controller provided by the embodiment of the present invention.

[0034] Reference Signs:

[0035] 10. Housing assembly; 11. Accommodating cavity; 12. First housing; 13. Second housing; 14. Rope groove;

[0036] 20. Speed limiting device; 21. Transmission shaft; 211. Gear part; 22. Speed limiting component; 221. Positioning part; 2211. Positioning element; 2211-1. Positioning main body; 2211-2. Limiting part; 2212. Stop piece; 222. Elastic element; 223. Friction part; 2231. Friction element; 2231-1. Friction main body; 2231-2. Support part; 2232. Support element; 2232-1. Notch part; 224. Connection part; 2241. Connector; 2242. Fastener;

[0037] 30. Rope wheel assembly; 31. Rope wheel body; 32. Transmission gear; 33. Working rope; 40. Hook assembly; 41. Hook body; 42. Connection main body; 421. First connection part; 422. Second connection part; 50. Handwheel; 60. Anti-rotation assembly. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0041] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] Figure 1 is a schematic structural view of a descender provided by an embodiment of the present utility model. Figure 2 is a side view of a descender provided by an embodiment of the present utility model. Figure 3 is Figure 2 a cross-sectional view along line A-A in

[0043] Referring to Figures 1 to 3 , an embodiment of the present utility model provides a descender, which includes a housing assembly 10, a speed-limiting device 20, and a rope wheel assembly 30.

[0044] The housing assembly 10, as the main structure that cooperates with the speed-limiting device 20 for frictional deceleration, can be made of high-strength aluminum alloy material or stainless steel material. The housing assembly 10 has high anti-corrosion performance, high structural strength, and is corrosion-resistant. The housing assembly 10 includes a first housing 12 and a second housing 13 that are oppositely arranged. The first housing 12 and the second housing 13 can be fixedly connected by fasteners such as screws, bolts, and rivets. The first housing 12 and the second housing 13 enclose a receiving cavity 11. The receiving cavity 11 can be formed inside either the first housing 12 or the second housing 13, and the other of the first housing 12 and the second housing 13 can act as a cover plate. It is also possible to form receiving sub-cavities by inwardly recessing from the end faces in both the first housing 12 and the second housing 13. When the first housing 12 and the second housing 13 are connected, the first housing 12 and the second housing 13 jointly enclose the receiving cavity 11.

[0045] Among them, at least one of the first housing 12 and the second housing 13 is adapted to be hung on an anchor point. That is, the first housing 12 or the second housing 13 can be hung on the anchor point, or both the first housing 12 and the second housing 13 can be hung on the anchor point.

[0046] The speed-limiting device 20 is arranged inside the accommodating cavity 11. The speed-limiting device 20 includes a transmission shaft 21 and at least one group of speed-limiting components 22. That is, one group of speed-limiting components 22 can be arranged, or two groups or multiple groups can be arranged. The transmission shaft 21 is rotatably arranged in the accommodating cavity 11, that is, the position where the transmission shaft 21 contacts the first housing 12 or the second housing 13 is connected by a bearing.

[0047] The speed-limiting component 22 includes a positioning member 221, an elastic element 222, and at least two friction members 223. The positioning member 221 is fixedly connected to the transmission shaft 21. The elastic element 222 is sleeved on the outer circumferential surface of the positioning member 221. At least two friction members 223 are arranged at intervals along the circumferential direction of the positioning member 221. At least two friction members 223 are embedded in the elastic element 222, that is, the elastic element 222 is located between the friction member 223 and the positioning member 221. The elastic element 222 can rotate with the transmission shaft 21 to expand under the action of centrifugal force and push the friction member 223 against the cavity wall of the accommodating cavity, thereby realizing friction deceleration.

[0048] The rope pulley assembly 30 is arranged in the accommodating cavity 11. The rope pulley assembly 30 is in transmission cooperation with the transmission shaft 21. The rope pulley assembly 30 rotates at a high speed under the action of an external force and simultaneously drives the transmission shaft 21 to rotate at a high speed. The elastic element 222 also rotates at a high speed with the transmission shaft 21 to expand outwards under the action of centrifugal force and push the friction member 223 against the cavity wall of the accommodating cavity 11 for friction deceleration. The braking force generated by the friction member 223 acts on the transmission shaft 21 in the reverse direction, so that the transmission shaft 21 decelerates, and then the rope pulley assembly 30 decelerates, realizing the constant-speed descent of the descender.

[0049] It can be understood that for the descender provided by the embodiment of the present invention, by arranging the positioning member 221, the elastic element 222, and at least two friction members 223 to form the speed-limiting component 22, the positioning member 221 is fixedly connected to the transmission shaft 21. The elastic element 222 is sleeved on the outer circumferential surface of the positioning member 221. At least two friction members 223 are arranged at intervals along the circumferential direction of the positioning member 221. At least two friction members 223 are embedded in the elastic element 222, that is, the elastic element 222 is located between the friction member 223 and the positioning member 221. The elastic element 222 can rotate with the transmission shaft 21 to expand under the action of centrifugal force and push the friction member 223 against the cavity wall of the accommodating cavity, thereby realizing friction deceleration.

[0050] By improving the structure of the friction member 223, the friction member 223 is integrally embedded on the elastic element 222. When the elastic element 222 rotates at a high speed with the transmission shaft 21 and expands outward under the action of centrifugal force, the elastic element 222 pushes the friction member 223 to abut against the cavity wall of the accommodation cavity to achieve frictional deceleration. The braking force generated by the friction member 223 acts on the transmission shaft 21 in the reverse direction, thereby decelerating the transmission shaft 21, and further decelerating the rope wheel assembly 30 to achieve constant-speed descent of the descender. With this setting, since the friction member 223 as a whole participates in the frictional action as a deceleration unit, it has a relatively large structural volume and weight, and a large inertia, and can operate continuously and stably. It can effectively avoid the problem that the friction plate is pasted and extruded onto the steel back of the centrifugal block, and is easily affected by the environment (such as environmental factors such as high temperature, low temperature or soaking in water) and causes delamination, so that the descender is prone to jamming during operation and the operation stability is poor.

[0051] Compared with the speed-limiting device 20 in the related art, the speed-limiting assembly 22 provided by the embodiment of the present invention can increase the contact area between the friction member 223 and the cavity wall of the accommodation cavity 11, thereby increasing the frictional force between the friction member 223 and the cavity wall of the accommodation cavity 11, so that the stability of the speed-limiting assembly 22 is better.

[0052] It should be noted that, in the embodiment of the present invention, the speed-limiting assemblies 22 are symmetrically arranged on both sides of the plane where the rope wheel assembly 30 is located, which is equivalent to the descender adopting a double-brake system, having the advantages of large load and stable transmission. Moreover, the descender provided by the embodiment of the present invention adopts a two-way operation design. One end of the working rope 33 descends while the other end ascends simultaneously, which can achieve continuous descending escape and support two people to escape simultaneously, thereby improving the escape efficiency in case of danger.

[0053] Figure 4 It is the front view of the speed-limiting assembly in the descender provided by the embodiment of the present invention. Figure 5 Figure 4 It is the cross-sectional view along the line B-B in. Figure 6 It is the side view of the speed-limiting assembly in the descender provided by the embodiment of the present invention.

[0054] Refer to Figures 4 to 6 In some embodiments of the present invention, the structures of each friction member 223 are the same. The friction member 223 includes a friction element 2231 and a support element 2232. Installation grooves (not labeled in the figure) are symmetrically arranged on both sides of the friction element 2231, and the support element 2232 is arranged in the installation groove to form an integral structure with the friction element 2231.

[0055] The support element 2232 is detachably connected to the friction element 2231 through the connecting component 224, and a receiving cavity (not labeled in the figure) for accommodating the elastic element 222 is defined between the support element 2232 and the friction element 2231. The elastic element 222 is located in the receiving cavity between the friction element 2231 and the support element 2232.

[0056] Correspondingly, each friction component 223 is composed of a friction element 2231 and a support element 2232. The friction element 2231 can be a block-shaped piece with a sector-shaped cross-section. The friction element 2231 is mainly made of materials such as asbestos-based friction materials, semi-metallic friction materials, composite fiber friction materials, and ceramic fiber friction materials, which have a sufficiently high and stable friction coefficient and good wear resistance.

[0057] The support element 2232 mainly cooperates with the friction element 2231 to define a receiving cavity for accommodating the elastic element 222. When the elastic element 222 is embedded in this receiving cavity, it can be understood that the friction component 223 is embedded on the elastic element 222 and can expand with the elastic element 222 to abut against the cavity wall of the receiving cavity 11 to achieve frictional deceleration.

[0058] By symmetrically arranging mounting grooves on both sides of the friction element 2231, the longitudinal section shape of the friction element 2231 is similar to a "T" shape. Such a setting can not only increase the friction area of the friction element 2231, improve the stability and reliability of frictional braking, but also reduce the material of the friction element 2231 and lower the manufacturing cost of the friction element 2231.

[0059] Figure 7 It is a schematic exploded view of the structure of the friction component 223 in the descender provided by the embodiment of the present invention. Figure 8 It is a sectional view of the structure of the friction component 223 in the descender provided by the embodiment of the present invention.

[0060] Refer to Figure 7 and Figure 8 In some embodiments of the present invention, the friction element 2231 includes a friction main body 2231-1 and a support portion 2231-2. The support portion 2231-2 is perpendicularly connected to the friction main body 2231-1. The support element 2232 is detachably connected to the support portion 2231-2 through the connecting component 224, and the elastic element 222 is located between the support portion 2231-2 and the support element 2232.

[0061] The support element 2232 is detachably connected to the support portion 2231-2 of the friction element 2231 through the connecting member 224. The support element 2232 can act as a part of the friction element 2231 to play a supporting role, and can cooperate with the support portion 2231-2 of the friction element 2231 to define a receiving cavity for accommodating the elastic element 222, facilitating the connection of the friction member 223 and the elastic element 222.

[0062] Wherein, one side surface of the friction main body 2231-1 facing away from the support portion 2231-2 is adapted to abut against the cavity wall of the accommodating cavity 11 to achieve frictional deceleration. Since the longitudinal section shape of the friction main body 2231-1 is arranged in a structure similar to a "T" shape, a friction surface is formed on one side surface of the friction main body 2231-1 facing away from the support portion 2231-2. Compared with the friction structure in the related art, such an arrangement can not only increase the contact area of frictional braking, enable the friction main body 2231-1 to fully friction with the cavity wall of the accommodating cavity 11 to achieve deceleration, and further make the operation of the descender device more stable; moreover, the overall structure of the friction element 2231 is in a "T" shape, which is convenient for enhancing the overall structural strength of the friction element 2231.

[0063] Continue to refer to Figure 7 and Figure 8 In some embodiments of the present invention, the connecting member 224 includes a connecting piece 2241 and a fastening piece 2242. One end of the connecting piece 2241 forms a flanging. The other end of the connecting piece 2241 passes through the friction element 2231 and the support element 2232, and the fastening piece 2242 is connected to the end of the connecting piece 2241 that passes through, so as to detachably connect the friction element 2231 and the support element 2232.

[0064] Equivalently, the other end of the connecting piece 2241 sequentially passes through the support element 2232, the friction element 2231 and the support element 2232, and the position extending out of the support element 2232 is fixed by the fastening piece 2242. The fastening piece 2242 may include a nut and a gasket. Only the gasket is shown in the figure, and the nut is not shown.

[0065] Equivalently, the connecting member 224 provided in the embodiment of the present invention presses and rivets the material at one end of the connecting piece 2241 through a riveting press, and uses the static pressure generated by the riveting press to upset the connecting piece 2241 to form a upset head, that is, a closed annular flanging is formed at the end of the connecting piece 2241, so that the connecting piece 2241 has strong stability and load-bearing capacity, facilitating the connection of the connecting piece 2241. In addition to the above setting method of the connecting member 224, the connecting member 224 can also adopt the cooperation method of bolts and nuts to fix the support element 2232 and the friction element 2231.

[0066] In some embodiments of the present utility model, a notch portion 2232-1 is provided on a side of the support element 2232 close to the support portion 2231-2. When the support element 2232 is connected to both sides of the support portion 2231-2 through a connecting member 224, a side wall of the notch portion 2232-1 and a wall surface of the support portion 2231-2 jointly enclose a receiving cavity for receiving the elastic element 222. Since the support elements 2232 are symmetrically arranged on both sides of the support portion 2231-2, elastic elements 222 can be provided between each support element 2232 and the support portion 2231-2. Equivalently, two sets of elastic elements 222 are arranged in parallel with one friction member 223, which can improve the stability and reliability of the friction member 223.

[0067] Continue to refer to Figures 4 to 6 , in some embodiments of the present utility model, the positioning member 221 includes a positioning element 2211 and a stopper 2212. The positioning element 2211 includes a positioning body 2211-1 and a limiting portion 2211-2, and the limiting portion 2211-2 is provided at one end of the positioning body 2211-1.

[0068] Equivalently, the shape of the cut surface of the positioning element 2211 along the axis is a "T"-shaped structure, and the positioning body 2211-1 is a cylindrical structure. The limiting portion 2211-2 is integrally formed with the positioning body 2211-1, and the limiting portion 2211-2 is equivalent to a limiting flange at one end of the positioning body 2211-1. The limiting portion 2211-2 and the positioning body 2211-1 can also be separately provided, and the limiting portion 2211-2 is fixedly connected to one end of the positioning body 2211-1.

[0069] The elastic element 222 and at least two friction members 223 are arranged along the outer circumference of the positioning body 2211-1. The stopper 2212 is fixedly provided at one end of the positioning body 2211-1 away from the limiting portion 2211-2 for restricting the elastic element 222 and at least two friction members 223 from disengaging from the positioning body 2211-1. Equivalently, the limiting portion 2211-2 and the stopper 2212 are spaced apart at positions close to both ends of the positioning body 2211-1, and an installation space is defined between the positioning body 2211-1, the limiting portion 2211-2 and the stopper 2212. The elastic element 222 and at least two friction members 223 are located in this installation space, which can improve the overall stability and reliability of the structure.

[0070] That is to say, it is equivalent to using the limiting part 2211-2 and the stopper 2212 to limit the degrees of freedom of the elastic element 222 and at least two friction members 223 moving along the axial direction of the positioning main body 2211-1, so as to ensure that under the action of centrifugal force, the elastic element 222 and at least two friction members 223 can expand outwards so that the friction members 223 abut against the cavity wall of the accommodating cavity 11 for friction to achieve friction deceleration and improve the reliability of the friction members 223.

[0071] It should be noted that the elastic element 222 is a spring, and the head and tail of the spring are connected end to end to form an annular structure. The elastic element 222 is sleeved on the outer circumferential surface of the supporting main body. When the elastic element 222 and the friction member 223 rotate at a high speed along with the supporting part 2231-2 fixedly arranged on the transmission shaft 21, the stopper 2212 and the limiting part 2211-2 limit and block the elastic element 222 and the friction member 223. The friction member 223 is affected by the centrifugal force and expands outwards against the tension of the elastic element 222, so that the friction surface of the friction element 2231 in the friction member 223 frictions with the cavity wall of the accommodating cavity 11 for deceleration. The braking force generated by the friction member 223 acts on the transmission shaft 21 in the reverse direction, thereby realizing the constant-speed descent of the rope pulley assembly 30.

[0072] Continue to refer to Figure 3 , in some embodiments of the present invention, the rope pulley assembly 30 includes a rope pulley body 31, a transmission gear 32 and a working rope 33. The transmission gear 32 is meshed with the transmission shaft 21. The rope pulley body 31 is fixed to the transmission gear 32. The working rope 33 is wound around the rope pulley body 31, and both ends of the working rope 33 extend out of the housing assembly 10 respectively.

[0073] Equivalently, a gear part 211 is provided on the transmission shaft 21, and the gear part 211 can be meshed with the transmission gear 32. When the transmission gear 32 rotates at a high speed, it can drive the transmission shaft 21 and the gear part 211 to rotate at a high speed; or a gear is provided separately and fixedly connected to the transmission shaft 21 to form the gear part 211. Among them, the position of the gear part 211 corresponds to the position of the transmission gear 32, and the gear part 211 is meshed with the transmission gear 32.

[0074] An installation part is provided on one side of the transmission gear 32. The installation part is coaxially arranged with the body of the transmission gear 32. The rope pulley body 31 is sleeved on the installation part and connected to the transmission gear 32 through fasteners 2242 such as screws and bolts, and can rotate along with the transmission gear 32.

[0075] A rope groove 14 is provided on the first housing 12 or the second housing 13. The rope groove 14 is engaged with the working rope 33 to further provide a deceleration effect. Among them, the rope groove 14 is a conical groove, and a plurality of teeth are arranged at intervals on the groove wall of the rope groove 14. The closer the working rope 33 is engaged with the rope groove 14, the closer the working rope 33 is to the bottom of the rope groove 14, and the greater the frictional force provided by the rope groove 14 for the working rope 33, and the more obvious the deceleration or even braking effect. Among them, the working rope 33 can adopt a polyamide fiber working rope, which is wear-resistant, resistant to high / low temperatures, and resistant to salt spray, and is suitable for harsh environments.

[0076] Continue to refer to Figures 1 to 3 , in some embodiments of the present invention, the descender further includes a hook assembly 40, a handwheel 50 and an anti-rotation assembly 60. The hook assembly 40 is provided on the housing assembly 10. The hook assembly 40 is adapted to be hung on an anchoring point. The handwheel 50 is fixedly connected to the transmission shaft 21. The anti-rotation assembly 60 is provided on the housing assembly 10 and is adapted to limit the one-way extension of the working rope 33.

[0077] By adding a handwheel 50 to achieve the rescue function, the shaking can be effectively reduced during the lifting operation, and the secondary injury to the rescued person can be reduced. The anti-rotation assembly 60 has the function of real-time locking and braking. By adding the anti-rotation assembly 60 on the housing assembly 10, real-time braking is achieved during the rescue process, and the rescue is more labor-saving.

[0078] It can be understood that the descender provided by the embodiment of the present invention, by providing a handwheel 50 and an anti-rotation assembly 60 on the housing assembly 10, the working rope 33 can be reversely retracted through the descender and then extended by rotating the handwheel 50. In this way, with the help of the rescuer, the rescued person can be lifted from the ground or other low-level positions to the top floor of the building to achieve the lifting rescue.

[0079] Figure 9 is a schematic structural diagram of the hook assembly 40 in the descender provided by the embodiment of the present invention.

[0080] Continue to refer to Figure 9 , in some embodiments of the present invention, the hook assembly 40 includes a hook body 41 and a connection body 42. The connection body 42 includes a first connection portion 421 and a second connection portion 422. The first connection portion 421 can rotate circumferentially relative to the second connection portion 422. Equivalently, there is a 360° universal rotation function between the first connection portion 421 and the second connection portion 422, which can facilitate the actual use requirements of the descender.

[0081] The hook body 41 is provided on one of the first connection portion 421 and the second connection portion 422, and the other of the first connection portion 421 and the second connection portion 422 is connected to the housing assembly 10.

[0082] It should be noted that the descender provided by the embodiment of the present utility model is provided with ventilation holes and heat dissipation fins on at least one of the first housing 12 and the second housing 13 for heat dissipation, which can effectively reduce the damage to the working rope 33.

[0083] During the operation of the descender provided by the embodiment of the present utility model, the rope wheel assembly 30 rotates at a high speed under the action of the working rope 33, and then drives the transmission shaft 21 meshed with the transmission gear 32 in the rope wheel assembly 30 to rotate at a high speed. The elastic element 222 and the friction member 223 are jointly limited by the stopper 2212 and the limiting portion 2211-2, and rotate at a high speed with the transmission shaft 21. Under the action of centrifugal force, the friction member 223 expands outward against the tension of the elastic element 222 and frictions with the wall of the accommodating cavity 11 to decelerate. The braking force generated by the friction braking structure acts on the transmission gear 32 shaft in the reverse direction to achieve a constant-speed descent for escape.

[0084] In addition, the structural shape of the friction element 2231 is a "T" shape, and the overall structural strength is relatively high. The contact surface between the friction element 2231 and the housing assembly 10 is an arc contact surface, which can fully perform friction braking and has a better deceleration effect.

[0085] The friction member 223 is connected to the friction element 2231 and the support element 2232 by riveting, and has relatively high reliability. Even when the descender operates continuously under extreme harsh environments, such as high-temperature environments, low-temperature environments, immersion environments and other extreme conditions, when the speed-limiting assembly 22 operates, it can avoid the connection failure of the speed-limiting assembly 22 caused by factors such as continuous high-temperature accumulation and low-temperature brittleness, and ensure the continuous and stable descent ability of the descender during the descent process.

[0086] The present utility model also provides a descension system, which includes a safety belt and the descender according to any one of the above. The safety belt is connected to the working rope 33 of the descender. The descension system can also be used in combination with various rescue accessories such as brackets, edge protectors, and T-shaped seesaws, and can complete rescue tasks more efficiently.

[0087] When encountering a dangerous situation and being unable to quickly evacuate through an elevator or climbing equipment, the staff can descend from a higher position to a safe position through the descender. For example, the rescued person can slowly descend to the ground from a construction building through the descender to achieve self-rescue; or with the help of the rescuer, the rescued person can be lifted to the top floor of the building through the descender to achieve lifting rescue, which can meet the escape needs in different scenarios.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A descending device, characterized in that: include: A shell assembly, suitable for being mounted on an anchor point, wherein the shell assembly has an accommodating cavity inside; A speed limiting device is located in the accommodating cavity, the speed limiting device comprises a transmission shaft and at least one set of speed limiting components, the transmission shaft is rotatably arranged in the accommodating cavity, the speed limiting component comprises a positioning component, an elastic element and at least two friction components, the positioning component is fixedly connected to the transmission shaft, the elastic element is sleeved on the outer circumferential surface of the positioning component, at least two friction components are arranged at intervals along the circumference of the positioning component, each friction component is embedded in the elastic element, the elastic element rotates with the positioning component to expand under the action of centrifugal force, and drives the friction component to abut against the cavity wall of the accommodating cavity to achieve friction deceleration; The rope pulley assembly is located in the accommodating cavity, and the rope pulley assembly is in transmission cooperation with the transmission shaft.

2. The descending device according to claim 1, characterized in that: Each of the friction components comprises a friction element and a support element; The friction element is symmetrically provided with mounting grooves on both sides, the support element is arranged in the mounting grooves, the support element is detachably connected to the friction element through a connecting component, and the elastic element is located between the friction element and the support element.

3. The descending device according to claim 2, characterized in that: The friction element comprises a friction body and a support portion; The support portion is vertically connected to the friction body, the support element is detachably connected to the support portion via a connecting component, and the elastic element is located between the support portion and the support element; A side surface of the friction body facing away from the support portion is suitable for abutting against a cavity wall of the accommodating cavity to achieve friction deceleration.

4. The descending device according to claim 2, characterized in that: The connecting component includes a connecting piece and a fastener, one end of the connecting piece forms a flange, the other end of the connecting piece is passed through the friction element and the supporting element, and the fastener is connected to the end of the connecting piece that passes through so as to detachably connect the friction element and the supporting element.

5. The descending device according to claim 1, characterized in that: The positioning component includes a positioning element and a stopper, the positioning element includes a positioning body and a limiting portion, and the limiting portion is arranged at one end of the positioning body; The elastic element and at least two friction components are arranged along the outer circumference of the positioning body, and the stopper is fixedly arranged at one end of the positioning body away from the limiting portion.

6. The descending device according to any one of claims 1 to 5, characterized in that: The rope pulley assembly includes a rope pulley body, a transmission gear and a working rope. The transmission gear is meshed with the transmission shaft, the rope pulley body is fixed to the transmission gear, the working rope is wound around the rope pulley body, and both ends of the working rope extend from the housing assembly respectively.

7. The descending device according to any one of claims 1 to 5, characterized in that: The housing assembly comprises a first housing and a second housing which are arranged opposite to each other, the first housing and the second housing are fixedly connected, and the first housing and the second housing enclose the accommodating cavity; At least one of the first shell and the second shell is adapted to be mounted to an anchor point.

8. The descending device according to any one of claims 1 to 5, characterized in that: It also includes a hook assembly, a handwheel and an anti-rotation assembly. The hook assembly is arranged on the shell assembly, the hook assembly is suitable for being hung on an anchor point, the handwheel is fixedly connected to the transmission shaft, and the anti-rotation assembly is arranged on the shell assembly, suitable for limiting the retraction of the working rope.

9. The descending device according to claim 8, characterized in that: The hook assembly comprises a hook body and a connecting body, wherein the connecting body comprises a first connecting portion and a second connecting portion, wherein the first connecting portion can rotate along a circle relative to the second connecting portion; The hook body is disposed on one of the first connection portion and the second connection portion, and the other of the first connection portion and the second connection portion is connected to the housing assembly.

10. A descent control system, characterized in that: It comprises a safety belt and the descender according to any one of claims 1 to 9, wherein the safety belt is connected to a working rope of the descender.

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