CN113995979A

CN113995979A - Falling protection device

Info

Publication number: CN113995979A
Application number: CN202111250388.7A
Authority: CN
Inventors: 刘子昭; 魏亚男; 任亚飞; 候宏鹏; 于占江
Original assignee: Ficont Industry Beijing Co Ltd
Current assignee: Ficont Industry Beijing Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-02-01

Abstract

The invention relates to the technical field of anti-falling equipment, and provides a falling protection device which comprises a transmission part, a rope return assembly, a rope wheel assembly, a buffer mechanism and a locking mechanism, wherein the transmission part is arranged on the rope return assembly; the shell positioned on the outermost side is assembled through the corresponding cover body in a sealing manner, so that a plurality of cavities are formed by the plurality of shells and the plurality of cover bodies; the rope return assembly, the rope wheel assembly, the buffer mechanism and the locking mechanism are arranged in the plurality of cavities, wherein the rope return assembly, the rope wheel assembly and the locking mechanism are connected through transmission parts; the buffer mechanism is connected through a transmission part or is matched and connected with the locking mechanism. According to the invention, each part can be assembled after being modularized respectively, so that each part can be conveniently and independently installed, maintained and replaced, the installation and maintenance time can be effectively saved, and the technical requirements on maintenance personnel are low; each part can carry out the transmission of power through the driving medium, has simplified the structure, and makes the gyration precision high, and the protection effect of preventing falling is better.

Description

Falling protection device

Technical Field

The invention relates to the technical field of anti-falling equipment, in particular to a falling protection device.

Background

The falling protection is mainly used for preventing the falling personnel from being injured when falling. Fall protection devices are usually provided as safety protection modules suspended from anchor points.

The existing fall protection device comprises a rope wheel wound with a safety rope, a centrifugal speed limiting mechanism for preventing the rotating speed of the rope wheel from being higher than a preset rotating speed, and a buffer device. When the rotating speed of the rope wheel is higher than the preset rotating speed and the centrifugal speed limiting mechanism is activated, the buffer device is started.

Although current protector that falls can effectively prevent personnel high altitude and fall. But current protector that falls generally sets up rope sheave, speed-limiting mechanism, buffer etc. into monolithic structure, when leading to one of them part to maintain the change, need will fall the whole dismantlement of protector and change, not only increase maintenance duration, be unfavorable for the modularization production equipment, lead to falling protector assembly to be useless because of maintenance personal's level difference moreover easily.

In addition, if the existing falling protection device is used in an extreme environment, such as an offshore wind turbine platform and other corrosive extreme environments, the existing falling protection device is easily corroded to cause the failure of the function of equipment.

Disclosure of Invention

The invention provides a falling protection device, which is used for solving at least one technical defect in the prior art, realizing the purposes of independent installation, independent maintenance and replacement of each component, having better sealing performance and effectively avoiding the problem of equipment failure caused by easy corrosion of the falling protection device.

In order to achieve the purpose, the invention provides a falling protection device which comprises a transmission part, a rope return assembly, a rope wheel assembly, a buffer mechanism and a locking mechanism, wherein the transmission part is arranged on the rope return assembly; the shell positioned at the outermost side is assembled through the corresponding cover body in a sealing way, so that a plurality of cavities are formed by the shells and the cover bodies;

the transmission piece penetrates through the plurality of cavities and is in transmission connection with each shell;

the rope return assembly, the rope wheel assembly, the buffer mechanism and the locking mechanism are arranged in the cavities, wherein the rope return assembly, the rope wheel assembly and the locking mechanism are connected through the transmission parts; the buffer mechanism is connected with the transmission part or is matched and connected with the locking mechanism.

According to the falling protection device provided by the invention, each shell is provided with at least one accommodating cavity, and the shells and the outermost shell are connected with the corresponding cover body through corresponding connecting pieces.

According to the falling protection device provided by the invention, the transmission part is a transmission shaft, and the transmission shaft is provided with a second clamping groove connected with the rope returning component, a key groove or a prismatic surface in transmission connection with the rope pulley component and the locking mechanism, and a third clamping groove matched with the locking mechanism for axial positioning.

According to the fall protection device provided by the invention, the rope return assembly comprises an adjusting ring and a rope return spring;

the adjusting ring is fixedly connected to the corresponding cover body or the corresponding shell, a first clamping groove connected with the first mounting end of the rope return spring is formed in the inner wall of the adjusting ring, and the second mounting end of the rope return spring is connected with the second clamping groove.

According to the falling protection device provided by the invention, the rope return assembly comprises a rope return spring, a first clamping groove connected with a first mounting end of the rope return spring is arranged on a shell corresponding to the rope return spring, and a second mounting end of the rope return spring is connected with a second clamping groove.

According to the falling protection device provided by the invention, the rope wheel assembly comprises a wheel body and a rope;

the wheel body is matched with the key groove through a key or is in matched transmission connection with the transmission shaft through a through hole matched with the prismatic surface through the prismatic surface, and the rope is wound on the wheel body and extends out of the corresponding cavity.

According to the falling protection device provided by the invention, the locking mechanism comprises a tooth body, a swinging assembly and an elastic element;

the tooth body sleeve is established on the transmission shaft, the swing subassembly transmission is connected on the transmission shaft, elastic element with the swing subassembly is connected.

According to the fall protection device provided by the invention, the swing assembly comprises a supporting piece, a swing locking block and a mandrel;

the swing locking block is rotationally connected to the supporting piece through the mandrel;

the supporting piece is matched with the key groove through a key or is in transmission connection with the transmission shaft through a through hole matched with the prism surface through the prism surface.

According to the falling protection device provided by the invention, the supporting piece is connected with one end of the elastic element to form a first connecting point, and the swinging locking block is connected with the other end of the elastic element to form a second connecting point;

the connecting line between the center of the mandrel and the first connecting point forms a transition line, and the second connecting point switches positions on two sides of the transition line so as to realize state switching between the swing lock block and the tooth body locking and between the swing lock block and the tooth body unlocking.

According to the falling protection device provided by the invention, the locking mechanism further comprises a clamp spring, and the clamp spring is arranged on the transmission shaft through the third clamp groove.

According to the falling protection device provided by the invention, the buffer mechanism comprises a brake plate connected with the corresponding shell and two friction wheel sets arranged on two sides of the brake plate;

the gear body comprises an installation part, the brake plate and the two friction wheel sets are connected to the installation part and close to the gear body, and the friction wheel sets and the gear body are provided with pressure springs.

According to the falling protection device provided by the invention, the friction wheel set consists of a steel plate and a friction plate, the friction plate is arranged close to the brake plate, the central positions of the steel plate and the friction plate are respectively provided with a limiting hole, and a first limiting surface matched with a second limiting surface arranged on the mounting part is arranged on the limiting hole.

According to the falling protection device provided by the invention, the transmission shaft comprises a first transmission part and a second transmission part, the first transmission part and the second transmission part are not coaxially arranged, and the two transmission parts are in meshing transmission through gears.

According to the falling protection device provided by the invention, sealing parts are arranged among a plurality of shells, or between the shells and corresponding cover bodies, or between the shells and the transmission parts.

The falling protection device provided by the invention is provided with a plurality of cavities for installing each component, the rope return assembly, the rope wheel assembly, the buffer mechanism and the locking mechanism are arranged in the plurality of cavities, each component can be assembled after being modularized respectively, and each component can be conveniently and independently installed, maintained and replaced, so that the installation and maintenance time can be effectively saved, and meanwhile, the technical requirements on maintenance personnel are lower.

And the rope return assembly, the rope pulley assembly, the buffer mechanism and the locking mechanism are all connected with the transmission part, so that a plurality of parts can transmit force through the transmission part, the structure is simplified, the integral structure of the falling protection device is more compact, the rotation precision is high, and the falling protection effect is better.

In addition, each cavity for installation is a sealed independent cavity, so that other substances can be prevented from entering the cavity to influence the use of each component, and the falling protection device has a remarkable effect particularly in an extreme environment.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Figure 1 is an exploded schematic view of embodiment 1 of a fall protection device provided in accordance with the present invention;

figure 2 is a cross-sectional view of embodiment 1 of a fall protection device provided in accordance with the present invention;

figure 3 is a schematic view of the construction of the transmission member in embodiment 1 of the fall protection arrangement provided by the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

figure 5 is a schematic view of a partial explosion arrangement of embodiment 1 of a fall protection arrangement provided in accordance with the invention;

figure 6 is a schematic view of the return line spring of embodiment 1 of the fall protection arrangement provided by the present invention;

figure 7a is a schematic view of a swing lock in a first position in accordance with embodiment 1 of the fall protection arrangement provided by the present invention;

figure 7b is a schematic view of a swing lock in a second position in accordance with embodiment 1 of the fall protection arrangement provided by the present invention;

reference numerals:

1: a first housing; 2: a second housing; 3: a first cover body;

4: a second cover body; 5: a transmission member; 51: a first cylindrical surface;

52: a second cylindrical surface; 53: a third cylindrical surface; 54: a step surface;

55: a first step; 56: a second step; 57: a second card slot;

58: a keyway; 59: third card slot 6: a rope return assembly;

61: an adjusting ring; 611: a first card slot; 62: a rope return spring;

621: a spring body; 622: a first mounting end; 623: a second mounting end;

7: a sheave assembly; 71: a wheel body; 72: a rope;

73: a handle; 74: a hook; 8: a buffer mechanism;

81: a pressure spring; 82: a first friction wheel set; 821: a limiting hole;

822: a first limiting surface; 83: a brake plate; 831: a first hole;

832: a second hole; 84: a second friction wheel set; 85: fixing a nut;

9: a locking mechanism; 91: a tooth body; 911: a tooth portion;

912: an installation part; 913: positioning holes; 914: a second limiting surface;

92: a swing assembly; 921: a support member; 922: swinging the locking block;

922 a: a trigger end; 922 b: a locking end; 923: a mandrel;

93: an elastic element; 931: a body; 932: a first connection end;

933: a second connection end; 10: a first cavity; 11: a second cavity;

12: a third cavity; 13: a clamp spring; 14: a bearing;

15: a seal member; 16: a key.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "first", "second", "third" and "fourth" do not denote any sequence relationship, but are merely used for convenience of description. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Embodiments of the present invention are described below with reference to fig. 1 to 7 b. It should be understood that the following description is only exemplary embodiments of the present invention and is not intended to limit the present invention in any way.

As shown in fig. 1 and 2, the fall protection device provided by the invention comprises a transmission piece 5, a rope return assembly 6, a rope pulley assembly 7, a buffer mechanism 8 and a locking mechanism 9; the multifunctional cover body is characterized by further comprising a plurality of shells and a plurality of cover bodies, the shells are sequentially connected, and the shell positioned on the outermost side is sealed through the corresponding cover body to be assembled, so that a plurality of cavities are formed after the shells and the cover bodies are assembled.

Wherein, driving medium 5 runs through a plurality of cavitys and sets up to all transmission connection between driving medium 5 and every casing, so that driving medium 5 rotates on the casing, and the casing keeps motionless for driving medium 5.

Wherein, it sets up in a plurality of cavities to return rope subassembly 6, rope sheave subassembly 7, buffer gear 8 and locking mechanism 9, and returns rope subassembly 6, rope sheave subassembly 7 and locking mechanism 9 and be connected with driving medium 5 respectively, and buffer gear 8 can be connected with driving medium 5, and buffer gear 8 also can cooperate with locking mechanism 9 to be connected, provides corresponding cushioning effect at the locking in-process for locking mechanism 9.

Specifically, the buffer mechanism 8 is connected with the transmission member 5, and is adapted to the rope return assembly 6, the rope pulley assembly 7, the buffer mechanism 8 and the locking mechanism 9 which are respectively and independently arranged in different cavities; the buffer mechanism 8 can also be connected with the locking mechanism 9 in a matching way, which is suitable for the situation that the buffer mechanism 8 and the locking mechanism 9 are located in the same corresponding cavity, and the more detailed description is described in detail in the following, please refer to it.

The falling protection device provided by the invention can be suitable for lifting equipment series, such as climbing-free devices, elevators, offshore platform manned lifting devices and the like, and can also be suitable for protective structures of life saving ropes, safety belts and the like for high-altitude operation, such as: circuit maintenance, high-altitude glass curtain wall cleaning, high-altitude installation and the like.

Example 1

Referring to fig. 1 to 7b, at least one of the rope return assembly 6, the rope pulley assembly 7, the buffer mechanism 8 and the locking mechanism 9 is independently arranged in one of the cavities, and as an example, the falling protection device provided by the present invention is applied to a lifting device.

The structure of the fall protection device of the present embodiment will be described in detail below by taking as an example that two housings and two covers are assembled to form three cavities, namely a first cavity 10, a second cavity 11, and a third cavity 12, wherein the transmission member 5 penetrates through the three cavities, the rope return assembly 6, the rope pulley assembly 7, the buffer mechanism 8, and the locking mechanism 9 are disposed in the three cavities, and the rope return assembly 6, the rope pulley assembly 7, the buffer mechanism 8, and the locking mechanism 9 are connected to the transmission member 5, respectively.

Referring to fig. 1 in particular, the fall protection device provided in this embodiment includes a first housing 1, a second housing 2, a first cover 3, and a second cover 4, where the first housing 1 and the second housing 2 are connected to each other first, and then the first cover 3 and the second cover 4 close two ends of the two housings to realize sealing assembly.

The first housing 1 has a body and two end faces located at two ends of the body, a first accommodating chamber (not numbered in the figure) is formed inward from one end face of the first housing 1, and a second accommodating chamber (not numbered in the figure) is formed inward from the other end face of the first housing 1. The two accommodating cavities are separated to form independent cavities, that is, the first housing 1 is not through, and the two ends of the first housing 1 form a first opening end (not numbered in the figure) and a second opening end (not numbered in the figure).

Similarly, the second housing 2 has a body and two end faces located at both ends of the body, a third accommodating chamber (not numbered in the figure) is opened inward from one end face of the second housing 2, and a fourth accommodating chamber (not numbered in the figure) is opened inward from the other end face of the second housing 2. The two accommodating cavities are separated to form independent cavities, that is, the second housing 2 is not through, and a third opening end (not numbered in the figure) and a fourth opening end (not numbered in the figure) are formed at two ends of the second housing 2.

When the first shell 1 and the second shell 2 are connected first, the second accommodating cavity can coincide with the third accommodating cavity, so that the two shells and the two covers jointly form three independent cavities when the first cover body 3 and the second cover body 4 are packaged at the two ends of the two shells.

Or, the second housing 2 has a body and two end faces located at two ends of the body, a third accommodating cavity (not numbered in the figure) is formed inwards from one end face of the second housing 2, and the other end face is a closed plane.

When the first housing 1 and the second housing 2 are connected first, the closed end surface of the second housing 2 is connected to the second opening end of the first housing 1 and connected to the first housing 1 through the second connector, so that the sidewall of the second housing 2 and the second accommodating cavity enclose together to form the second cavity 11.

As shown in fig. 2, the first cover 3 is connected to the first open end of the first casing 1 and connected to the first casing 1 through a first connector, so that an inner wall (a side wall close to the accommodating cavity is referred to as an inner wall) of the first cover 3 and the first accommodating cavity jointly enclose to form a first cavity 10.

As shown in fig. 2, the third open end of the second housing 2 is connected to the second open end of the first housing 1 and connected to the first housing 1 through a second connector, so that the third accommodating cavity of the second housing 2 and the second accommodating cavity of the first housing 1 enclose together to form a second cavity 11.

As shown in fig. 2, the second cover 4 is connected to the fourth opening end of the second casing 2 and connected to the second casing 2 through a third connection member, so that the inner wall (the side wall close to the containing cavity is referred to as the inner wall) of the second cover 4 and the fourth containing cavity of the second casing 2 enclose together to form a third cavity 12.

As shown in fig. 3 to 5, the transmission member 5 is a transmission shaft, the transmission shaft is a stepped shaft, and includes a first cylindrical surface 51, a second cylindrical surface 52, and a third cylindrical surface 53 in this order, a stepped surface 54 and a first step 55 are provided between the first cylindrical surface 51 and the second cylindrical surface 52, and a second step 56 is provided between the second cylindrical surface 52 and the third cylindrical surface 53.

As shown in fig. 1, the circumferential centers of the first casing 1 and the second casing 2 are both provided with a first mounting hole (not numbered in the figure) and a second mounting hole (not numbered in the figure), the transmission member 5 penetrates through the first cavity 10, the second cavity 11 and the third cavity 12 through the first mounting hole and the second mounting hole, and bearings 14 (shown in fig. 2) are respectively arranged in the first mounting hole and the second mounting hole, so that the transmission member 5 is in transmission connection with the first casing 1 and the second casing 2 through the bearings 14.

Thus, when the transmission element 5 is rotated clockwise or counterclockwise about its central axis, the first housing 1 and the second housing 2 remain stationary relative to the transmission element 5, so that components such as a pull ring can be provided on the first housing 1 for connection to an anchor point or a hanging point.

It should be noted that, the first connecting piece, the second connecting piece and the third connecting piece can be threaded fasteners, and two adjacent components are fastened together to form a detachable connection. Specifically, the threaded fastener can be a bolt connection, a stud connection, a screw and the like, and can be selected according to the thickness of the component and the specific use requirement.

In the present embodiment, the rope return assembly 6 may be installed in any one of the first cavity 10, the second cavity 11 and the third cavity 12, and the installation of the rope return assembly 6 in the first cavity 10 is taken as an example for illustration.

As shown in fig. 1, the rope return assembly 6 includes an adjusting ring 61 and a rope return spring 62, the adjusting ring 61 can be fixedly connected to the first housing 1 by a bolt or a connecting column, and the fixing process requires that a connecting hole is provided in the first housing 1 and the adjusting ring 61 in advance.

As shown in fig. 6, the return cord spring 62 includes a spring body 621, and the spring body 621 is formed by continuously spirally winding a sheet spring to form two free ends. The two free ends are respectively designated as a first mounting end 622 and a second mounting end 623.

As shown in fig. 1, the adjusting ring 61 has a ring structure, and may also have a cup structure, the adjusting ring 61 is configured to accommodate the return cord spring 62, and a first locking groove 611 is provided on an inner side wall of the adjusting ring 61, and the first mounting end 622 of the return cord spring 62 can be accommodated in the first locking groove 611 and cannot be disengaged from the first locking groove 611 as the return cord spring 62 is deformed and restored.

As shown in fig. 3 to 5, a second engaging groove 57 is formed on the first cylindrical surface 51 of the transmission member 5, and the second mounting end 623 of the rope return spring 62 can be accommodated in the second engaging groove 57 and cannot be disengaged from the second engaging groove 57 along with the deformation recovery of the rope return spring 62.

Therefore, as shown in fig. 2, the rope returning spring 62 can provide an elastic restoring force to the pulley assembly 7 with both ends fixed, so that the rope 72 pulled out by the pulley assembly 7 can be automatically wound on the wheel body 71. Further, the return cord spring 62 can be set to an initial restoring force by rotating the adjusting ring 61, and after setting, the adjusting ring 61 is fixed to the first housing 1 again.

In addition, the adjusting ring 61 may not be provided in the rope returning assembly 6, the first clamping groove 611 is provided in the first accommodating cavity of the first housing 1, the initial restoring force of the rope returning spring 62 needs to be set in advance, so that the adjusting ring 61 is replaced by the first accommodating cavity, the structural components of the falling protection device are effectively reduced, the structure is simplified, the installation process is simplified, and the maintenance is more convenient.

In the present embodiment, the pulley assembly 7 can be installed in any one of the first cavity 10, the second cavity 11 and the third cavity 12, and the installation of the pulley assembly 7 in the second cavity 11 is taken as an example for description.

As shown in fig. 2, the pulley assembly 7 includes a pulley body 71 and a rope 72, and the rope 72 is wound on the pulley body 71 and can be selectively pulled out of the second cavity 11, and can be automatically returned to the second cavity 11 under the action of the rope returning assembly 6.

As shown in fig. 3 to 5, the transmission member 5 has a key groove 58 formed on the second cylindrical surface 52, the pulley body 71 is in transmission connection with the transmission member 5 through the key 16, and the rope 72 is wound clockwise or counterclockwise along the circumferential direction of the pulley body 71. Therefore, pulling the rope 72 along the free end of the rope 72 can drive the pulley body 71 to rotate, so that the pulley body 71 drives the transmission member 5 to rotate, and the rotating force of the pulley body 71 is transmitted to the transmission member 5.

In addition, a handle 73 is provided below the rope 72, a hook 74 is provided at a lower end of the handle 73, the rope 72 is pulled out from the second cavity 11 by the handle 73 or the hook 74, and the rope 72 is wound around the pulley body 71, so that the pulley body 71 can rotate along with the rope 72.

In this embodiment, the buffer mechanism 8 may be installed in any one of the first cavity 10, the second cavity 11 and the third cavity 12, and similarly, the locking mechanism 9 may also be installed in any one of the first cavity 10, the second cavity 11 and the third cavity 12, and the locking mechanism 9 and the buffer mechanism 8 are connected in sequence, and the description is given by taking an example in which the buffer mechanism 8 and the locking mechanism 9 are simultaneously disposed in the third cavity 12.

As shown in fig. 5, the locking mechanism 9 includes a gear body 91 and a movable structure, wherein the movable structure is drivingly connected to the transmission member 5, and the gear body 91 is kept stationary relative to the movable structure, so that when the movable structure moves centrifugally with the rotation of the transmission member 5, the gear body 91 can be restricted from being locked.

The cushion mechanism 8 is fitted over the tooth body 91, and the cushion mechanism 8 is also held stationary relative to the movable structure, so that a cushion effect can be provided at the moment of locking between the movable structure and the tooth body 91.

In particular, the movable structure comprises a swinging assembly 92 and an elastic element 93, wherein the swinging assembly 92 is suitable for switching between a first position and a second position; the elastic element 93 is connected with the swinging assembly 92, in the first position, the swinging assembly 92 is locked with the tooth body 91, and the swinging assembly 92 is relatively static with the tooth body 91; in the second position, the swing member 92 is unlocked from the tooth 91, and the swing member 92 and the tooth 91 move relatively.

As shown in fig. 5, the swing assembly 92 includes a support member 921, a swing lock block 922 and a spindle 923, the swing lock block 922 is connected to the support member 921 through the spindle 923, the support member 921 is connected to the transmission member 5 through a key 16, so that the support member 921 moves along with the transmission member 5, the swing lock block 922 can perform a pivotal movement around a center line of the spindle 923 along with the movement of the support member 921, and the support member 921 may be a fixed frame, as shown in fig. 5.

As shown in fig. 7a and 7b, the pendulum lock 922 has an activation end 922a and a locking end 922b, respectively, disposed on opposite sides of the centerline of the mandrel 923.

When the swing assembly 92 is located at the second position and the swing lock block 922 rotates with the support 921, the triggering end 922a of the swing lock block 922 contacts with the top of each tooth of the tooth body 91.

When the swing assembly 92 is in the first position, the locking end 922b of the swing lock block 922 is shaped to lock with the teeth of the gear body 91.

As shown in fig. 7a and 7b, a first end of the elastic element 93 is connected to the supporting member 921 to form a first connection point, and the other end of the elastic element 93 is connected to the swing lock block 922 to form a second connection point; a line between the center of the mandrel 923 and the first connection point forms a transition line, and the second connection point can be switched in position on both sides of the transition line.

When the second connection point moves to a direction close to the tooth body 91 and the second connection point is located at an inner side of the transition line (which may be understood as a side where the tooth body 91 is located, i.e., a first side), the elastic element 93 provides an inward pushing force or locking force to the swing lock block 922 so that the swing lock block 922 is in a locked state.

When the second connection point is moved away from the tooth body 91 and the second connection point is located outside the transition line (which may be understood as a side away from the tooth body 91, i.e., the second side), the elastic element 93 provides an outward pulling force or unlocking force to the swing lock block 922 to place the swing lock block 922 in the unlocked state.

Locking mechanism takes place to fall the locking back, because assault too greatly in the twinkling of an eye and lead to personnel and equipment to rock, and then leads to support piece 921 can take place a small amount of counter rotation, and the second tie point can still be located the inboard of cross-over line, can give the inward thrust of swing locking piece 922, consequently swing locking piece 922 under elastic element 93's effect, can guarantee that locking mechanism still is in the state of locking. When the shaking stop back support 921 rotates a little forward again, the swing lock block 922 can recover to the locking state, and the continuous falling locking condition can not occur. Therefore, the problem that the locking mechanism 9 may be disengaged after the falling is stopped and the person starts falling again in the prior art can be effectively solved, so that the safety of the locking mechanism is higher.

Under the control of the rope returning assembly 6, when the rope is quickly returned, the rotating speed of the wheel body 71 exceeds a set value, when the rope is completely received in the wheel body 71, if the force of the triggering end 922a of the swing lock block 922 hitting the tooth top is too large, the swing lock block 922 shakes, but the position of the second connection point is still located on the outer side of the transition line, the force provided by the elastic element 93 to the swing lock block 922 is a pulling force which resets outwards, so the swing lock block 922 can restore to an unlocking state under the action of the elastic element 93, and the rope cannot be pulled out again. Therefore, the problem that in the prior art, when a rope is quickly returned under the control of the rope return assembly 6, the rotating speed of the wheel body 71 exceeds a set value, the locking mechanism is in a locking state, and the rope cannot be pulled out again is effectively solved.

Therefore, the elastic element 93 can judge that the elastic element 93 provides forces in different directions for the swing lock block 922 by taking the transition line as a reference according to different states between the swing lock block 922 and the tooth body 91, so that the swing lock block 922 has a function of keeping an original state, and the possibility that the swing lock block 922 fails to be locked and people fall down again is prevented.

Special attention is needed to the installation positions of the tooth body 91 and the swing lock block 922, when the support 921 rotates along its axis to drive the swing lock block 922 to rotate, the triggering end 922a of the swing lock block 922 can collide with each tooth crest of the tooth body 91; it is necessary to ensure that the triggering end 922a of the swing lock block 922 is contacted with the tooth back of the tooth body 91 after impacting the tooth top of the tooth body 91 and being away from the tooth top of the tooth body 91, and if the swing lock block 922 does not rotate any more, the swing lock block 922 is restored to the running state under the action of the elastic element 93 to avoid the occurrence of the false locking.

Preferably, the elastic member 93 is a torsion spring, or a spring plate.

As can be understood by referring to fig. 7a, the elastic element 93 may be an elastic structure including a body 931, a first connection end 932 and a second connection end 933, the body is disposed on the support 921, the first connection end 932 and the support 921 are connected to form a first connection point, the second connection end 933 and the swing lock block 922 are connected to form a second connection point, the swing lock block 922 and the support 921 are connected to form a rotation point (i.e. the center of the core shaft 923), and a connection line between the first connection end and the rotation point forms a transition line. With the pivoting movement of the pendulum lock 922, the second connection point can be switched in position on both sides of the transition line. The elastic structure can be a structure formed by spring pieces.

In this embodiment, the locking mechanism 9 is in operation: the supporting member 921 rotates clockwise along with the transmission member 5, the swing lock block 922 rotates along with the supporting member 921, and the triggering end 922a of the swing lock block 922 strikes each tooth crest on the tooth body 91.

When the rotating speed of the transmission member 5 is less than the set value, the impact force between the swing lock block 922 and the top of the teeth of the tooth body 91 is less than the elastic force of the elastic element 93, and the swing lock block 922 enables the locking end 922b of the swing lock block 922 not to enter the root of the teeth of the tooth body 91 to be locked under the action of the elastic element 93, so that the normal rotation of the transmission member 5 can be ensured.

When the rotation speed of the transmission member 5 exceeds the set value, the impact force between the swing lock block 922 and the tooth crest of the tooth body 91 exceeds the elastic force of the elastic element 93, and the swing lock block 922 overcomes the elastic force of the elastic element 93, so that the locking end 922b of the swing lock block 922 enters the tooth root of the tooth body 91 to be locked, and the rotation of the transmission member 5 is stopped.

Therefore, when the operator stalls and falls down, the rope 72 pulls the wheel body 71 to rotate quickly, the wheel body 71 synchronously drives the transmission member 5 to rotate quickly, the rotating speed of the transmission member 5 exceeds a set value, the locking mechanism 9 is locked, accidental falling is prevented, and the safety of the operator is improved.

In addition, a handle 73 is arranged below the rope 72, a hook 74 is further arranged at the lower end of the handle 73, the rope 72 is pulled out from the second cavity 11 through the handle 73 or the hook 74, and the rope 72 is wound on the wheel body 71, so that the wheel body 71 rotates along with the rope 72.

As shown in fig. 5, the damper mechanism 8 includes a brake plate 83 and two friction wheel sets, which may be referred to as a first friction wheel set 82 and a second friction wheel set 84, and the first friction wheel set 82 and the second friction wheel set 84 are symmetrically disposed on both sides of the brake plate 83.

The cross section of the tooth body 91 is T-shaped and comprises a tooth part 911 and a mounting part 912; and a positioning hole 913 is formed through the tooth 91, the tooth 91 is sleeved on the third cylindrical surface 53 of the transmission member 5 through the positioning hole 913, and the tooth 91 can be kept stationary relative to the transmission member 5 or the movable structure.

As shown in fig. 5, the pressure spring 81 is further disposed on a side of the first friction wheel set 82 contacting the tooth portion 911, and corresponds to the pressure spring 81, the first friction wheel set 82, the brake plate 83, and the second friction wheel set 84 being sequentially disposed on the mounting portion 912 of the tooth body 91, an external thread being partially disposed on an outer circumferential surface of the mounting portion 912, and a fixing nut 85 being screwed on the mounting portion 912 to restrict the pressure spring 81, the first friction wheel set 82, the brake plate 83, and the second friction wheel set 84 on the mounting portion 912 of the tooth body 91.

A first hole 831 is formed in the center of the brake plate 83, and the brake plate 83 is connected to the mounting portion 912 of the tooth 91 through the first hole 831, so that the brake plate 83 can rotate relative to the mounting portion 912 of the tooth 91.

The brake plate 83 is fixedly connected to the second housing 2 through the second holes 832, preferably, the second holes 832 may be screwed to the second housing 2 through bolts so that the brake plate 83 is fixed with respect to the second housing 2, and therefore, the brake plate 83 can limit the tooth body 91 on the second housing 2, so that the tooth body 91 does not rotate with the rotation of the transmission member 5, and the tooth body 91 is kept immovable with respect to the transmission member 5 or the movable structure.

The first friction wheel set 82 and the second friction wheel set 84 are each formed by combining a steel plate (not numbered) for transmitting force and a friction plate (not numbered) for making frictional contact with the brake plate 83 to increase the friction coefficient, and the friction plate is disposed adjacent to the brake plate 83.

The central point of steel sheet and friction plate puts all to have seted up spacing hole 821 in the friction wheelset, all is provided with first spacing face 822 on this spacing hole 821, is provided with the spacing face 914 of second with this first spacing face 822 matched with on the installation department 912, can restrict the friction wheelset through the cooperation of first spacing face 822 and the spacing face 914 of second and rotate for installation department 912, provides the prerequisite for realizing the cushioning effect.

In this embodiment, the buffer mechanism 8 can also be connected with a transmission member, and only the buffer mechanism 8 needs to be kept stationary relative to the transmission member, so that corresponding buffering action can be provided at the instant of locking of the locking mechanism 9.

In the working process of the buffer mechanism 8 in this embodiment: the pressure generated by the pressure spring 81 always maintains a certain pressure between the friction plate of the friction wheel set and the brake plate 83.

The brake plate 83 is fixedly mounted on the second housing 2 and cannot rotate, so that the gear body 91 is configured to rotate on the third cylindrical surface 53 of the transmission member 5, when the swing lock block 922 in the locking mechanism 9 touches the gear body 91, the torque formed by the generated impact force is greater than the torque generated between the two friction wheel sets and the brake plate 83 due to the friction force, the gear body 91 can rotate relatively, and further the impact force can be buffered to some extent, so that the impact on the operator is reduced, and the injury is avoided.

The pressure spring 81 arranged in the buffer mechanism 8 is used for generating certain pressure to the friction wheel set and the brake plate 83, so that the friction wheel set and the brake plate 83 generate friction force to form friction torque to perform buffering operation, and the friction plate arranged in the friction wheel set plays a certain compensation role after being worn, so that the buffer mechanism 8 can be used for multiple times to prolong the service life of the buffer mechanism.

It should be noted that the number of the brake plates 83 is not limited specifically, and may be two or more, if the number of the brake plates 83 is increased, the number of the friction wheel sets is increased synchronously correspondingly, and the specific arrangement form and number of the brake plates 83 and the friction wheel sets are selected according to the actual use requirement.

Finally, locking mechanism 9 still includes jump ring 13, has seted up third draw-in groove 59 on the second face of cylinder 52 of driving medium 5 and near the position of second step 56, and jump ring 13 sets up in this third draw-in groove 59, can make locking mechanism 9 carry out axial positioning through jump ring 13 to guarantee that whole protector that falls can carry out normal installation and work.

In the working process of the embodiment, the rope pulley assembly 7 transmits rotation to the transmission shaft through the key 16, the transmission shaft transmits rotation to the locking mechanism 9 and the buffering mechanism 8 through the key 16, meanwhile, the transmission is transmitted to the rope returning spring 62 through the second clamping groove 57, and the rope returning spring 62 rotates together with the transmission shaft to gradually increase the elastic restoring force, so that the rope 72 can be automatically fed back into the second cavity 11. Specifically, the rope returning spring 62 transmits the elastic restoring force to the wheel body 71 through the transmission shaft, and the wheel body 71 rotates under the elastic restoring force to wind the rope 72 on the wheel body 71.

It should be noted that the faster the rope 72 is pulled, the faster the wheel 71 rotates, and thus the faster the support member 921 rotates in the locking mechanism 9. When the rotating speed is lower than the set value, the swing lock block 922 enables the swing lock block 922 not to be locked on the tooth body 91 under the action of the elastic element 93, and the rope 72 is ensured to be normally pulled out. When the rotating speed exceeds the set value, the impact force between the swing lock block 922 and the gear body 91 exceeds the elastic force of the elastic element 93, so that the swing lock block 922 is locked on the gear body 91, the support piece 921 stops rotating, the wheel body 71 stops rotating, the rope 72 stops pulling out, and the operator is prevented from falling.

It can be understood that the protector that falls that this embodiment provided is provided with three mutually independent installation cavity to carry out the transmission of power each other through the driving medium between the three independent installation cavity, thereby make and return rope subassembly, rope sheave subassembly, buffer gear and locking mechanism homoenergetic and produce modularly, each part of being convenient for simultaneously maintains alone and changes, can effectively save installation time, and the technical requirement to maintenance personal is lower simultaneously.

In the fall protection arrangement of this embodiment, it is also possible to mount the sheave assembly 7 in the first chamber 10, the return rope assembly 6 in the second chamber 11, and the buffer gear 8 and the locking gear 9 simultaneously in the third chamber 12. The understanding is made with specific reference to the various figures in example 1.

When the sheave assembly 7 is installed in the first cavity 10, a first locking groove formed in the first cylindrical surface 51 of the transmission member 5 needs to be eliminated, and a key groove may be formed in the first cylindrical surface 51, so that the sheave body 71 of the sheave assembly 7 is in key connection with the transmission member 5; or the first cylindrical surface 51 may be configured to be formed by a plurality of prismatic surfaces, such as a triangular prism, a quadrangular prism, a pentagonal prism, and the like, and a through hole having the same shape as the cross section of the prism is correspondingly formed in the wheel body 71, so that the wheel body 71 is in interference fit with the prism through the through hole, and the prism rotates along with the wheel body 71, thereby realizing the transmission connection between the wheel body 71 and the transmission member 5.

When the rope returning assembly 6 is installed in the second cavity 11, on the premise that the key groove 58 for key transmission with the locking mechanism 9 is arranged on the second cylindrical surface 52 of the transmission member 5, a second clamping groove capable of fixing the second installation end 623 of the rope returning spring 62 is formed in the second cylindrical surface 52, so that the rope returning spring 62 cannot be separated from the clamping groove along with deformation recovery.

The damping mechanism 8 and the locking mechanism 9 are both mounted in the third chamber 12, as can be understood with reference to the arrangement of the present embodiment. In addition, since each component of the fall protection device of this embodiment mainly transmits force through the transmission member 5, in addition to the two structures described in the above embodiments, on the premise of ensuring that the buffer mechanism 8 is directly or indirectly connected to the locking mechanism 9 (i.e. has a certain buffering effect on the impact force generated by the locking mechanism 9), the arrangement order of the cavities of the rope return assembly 6, the rope pulley assembly 7, the buffer mechanism 8 and the locking mechanism 9, i.e. the installation order of each component, specifically, the following situation can be adopted: (1) a rope return assembly 6 or a rope wheel assembly 7 is arranged in the first cavity 10, a locking mechanism 9 and a buffering mechanism 8 are arranged in the second cavity 11, and the rope wheel assembly 7 or the rope return assembly 6 is correspondingly arranged in the third cavity 12; (2) a locking mechanism 9 and a buffering mechanism 8 are arranged in the first cavity 10, a rope return assembly 6 or a rope wheel assembly 7 is arranged in the second cavity 11, and the rope wheel assembly 7 or the rope return assembly 6 is correspondingly arranged in the third cavity 12. The above-mentioned various setting situations only need to correspondingly adjust the structure of the transmission member 5 according to the operating principle of each component (for example, correspondingly adjust the positions of the second locking groove 57, the key groove 58 and the third locking groove 59 according to the installation positions of the rope returning assembly 6, the rope pulley assembly 7 and the locking mechanism 9), so that each component and the transmission member 5 can be connected, which is not described in detail herein.

Example 2

As can be understood by referring to the drawings in embodiment 1, the fall protection device provided in this embodiment includes a first housing and two cover bodies, a first accommodating cavity (not numbered) is formed inward at one end surface of the first housing 1, a second accommodating cavity (not numbered) is formed inward at the other end surface of the first housing 1, the two accommodating cavities are separated to form independent cavities, and the two end surfaces of the first housing 1 are correspondingly connected with the two cover bodies through corresponding connectors to form a cavity a (not shown) and a cavity B (not shown).

Wherein, rope sheave assembly 7 and rope return assembly 6 can be installed in cavity A, and buffer gear 8 and locking mechanism 9 can be installed in cavity B. Alternatively, the buffering mechanism 8 and the locking mechanism 9 can be installed in the cavity a, and the rope pulley assembly 7 and the rope return assembly 6 can be installed in the cavity B. Alternatively, the sheave assembly 7 may be mounted in the cavity a and the rope return assembly 6, the buffer mechanism 8 and the locking mechanism 9 may be mounted in the cavity B. Alternatively, the rope return assembly 6 may be mounted in the cavity a, and the rope pulley assembly 7, the buffer mechanism 8 and the locking mechanism 9 may be mounted in the cavity B. Alternatively, the rope return assembly 6, the buffer mechanism 8 and the locking mechanism 9 can be arranged in the cavity A, and the rope pulley assembly 7 can be arranged in the cavity B. Alternatively, the sheave assembly 7, the buffer mechanism 8 and the locking mechanism 9 may be installed in the cavity a, and the rope return assembly 6 may be installed in the cavity B.

Taking the example that the rope pulley assembly 7 and the rope return assembly 6 are installed in the cavity a, and the buffering mechanism 8 and the locking mechanism 9 are installed in the cavity B, the wheel body 71 in the rope pulley assembly 7 may be connected to the transmission member 5 through a key, see the above embodiment 1, or may be installed on the transmission member 5 through a prism-shaped through hole in an interference fit manner, meanwhile, a first engaging groove assembled with the first installation end 622 of the rope return spring 62 may be provided on the cavity where the rope return assembly 6 is located, or an adjusting ring having the first engaging groove may be provided on the cavity where the rope return assembly 6 is located, and a second engaging groove assembled with the second installation end 623 of the rope return spring 62 may be provided on the transmission member 5, see the above embodiment 1, or the second installation end 623 of the rope return spring 62 may be installed at the center position of the rope pulley assembly 7 through a connecting member, so that the wheel body 71 and the rope return spring 62 rotate synchronously. The working principle of the rope pulley assembly 7 and the rope return assembly 6 is the same as that of embodiment 1, and the description is omitted here.

When the damper mechanism 8 and the lock mechanism 9 are simultaneously installed in the cavity B, the embodiment can be implemented with reference to the above-described embodiment 1.

Example 3

As can be understood by referring to the drawings in embodiment 1, the fall protection device provided in this embodiment includes two covers and three housings, namely a first cover, a second cover, a first housing, a second housing, and a third housing, where the housings are connected in sequence, and the housing located at the outermost side is assembled through the corresponding cover seals, so that a plurality of cavities are formed after the housings and the covers are assembled. Specifically, a first accommodating cavity (not numbered) is formed inwards from one end face of the first shell, and a second accommodating cavity (not numbered) is formed inwards from the other end face of the first shell; a third accommodating cavity (not numbered in the figure) is formed inwards from one end face of the second shell, and a fourth accommodating cavity (not numbered in the figure) is formed inwards from the other end face of the second shell; a fifth accommodating cavity (not numbered in the figure) is formed inwards from one end face of the third shell, and a sixth accommodating cavity (not numbered in the figure) is formed inwards from the other end face of the third shell; the first accommodating cavity and the second accommodating cavity, the third accommodating cavity and the fourth accommodating cavity, and the fifth accommodating cavity and the sixth accommodating cavity are separated to form mutually independent cavities.

The first cover body and the second cover body seal the first shell and the second shell through corresponding connecting pieces, so that the first cover body and the first containing cavity form a first cavity, the second containing cavity and the third containing cavity form a second cavity, the fourth containing cavity and the fifth containing cavity form a third cavity, and the second cover body and the sixth containing cavity form a fourth cavity.

Under the prerequisite of guaranteeing that buffer gear 8 directly or indirectly connects at locking mechanism 9 (the impact force that produces locking mechanism 9 has certain cushioning effect promptly), can adjust the cavity setting order of returning rope subassembly 6, rope sheave subassembly 7, buffer gear 8 and locking mechanism 9 wantonly, realize returning rope subassembly 6, rope sheave subassembly 7, buffer gear 8 and locking mechanism 9 configuration in the cavity of difference. The method specifically comprises the following setting modes: (1) a rope return assembly 6 is arranged in the first cavity, a rope wheel assembly 7 is arranged in the second cavity, a locking mechanism 9 is arranged in the third cavity, and a buffer mechanism 8 is arranged in the fourth cavity; (2) a rope wheel assembly 7 is arranged in the first cavity, a rope return assembly 6 is arranged in the second cavity, a locking mechanism 9 is arranged in the third cavity, and a buffer mechanism 8 is arranged in the fourth cavity; (3) a locking mechanism 9 is arranged in the first cavity, a buffer mechanism 8 is arranged in the second cavity, a rope return assembly 6 is arranged in the third cavity, and a rope wheel assembly 7 is arranged in the fourth cavity; (4) a locking mechanism 9 is arranged in the first cavity, a buffer mechanism 8 is arranged in the second cavity, a rope wheel assembly 7 is arranged in the third cavity, and a rope returning assembly 6 is arranged in the fourth cavity; (5) a rope return assembly 6 is arranged in the first cavity, a locking mechanism 9 is arranged in the second cavity, a buffer mechanism 8 is arranged in the third cavity, and a rope wheel assembly 7 is arranged in the fourth cavity; (6) a rope wheel assembly 7 is arranged in the first cavity, a locking mechanism 9 is arranged in the second cavity, a buffer mechanism 8 is arranged in the third cavity, and a rope returning assembly 6 is arranged in the fourth cavity. The above-mentioned various setting situations only need to correspondingly adjust the structure of the transmission member 5 according to the operating principle of each component (for example, correspondingly adjust the positions of the second locking groove 57, the key groove 58 and the third locking groove 59 according to the installation positions of the rope returning assembly 6, the rope pulley assembly 7 and the locking mechanism 9), so that each component and the transmission member 5 can be connected, which is not described in detail herein.

Example 4

As can be understood by referring to the drawings in embodiment 1, the fall protection device provided by this embodiment further includes a sealing member 15, and the sealing member 15 may be a sealing ring, different from the above embodiments.

The seal 15 may be provided between a plurality of housings, or between a housing and a corresponding cover, or between a housing and a transmission.

Referring to fig. 2, taking embodiment 1 as an example for illustration, a sealing member 15 is disposed between the first housing 1 and the wheel body 71, so that the first cavity 10 forms a sealed cavity, thereby preventing other substances (e.g., corrosive liquid) from entering the cavity, and ensuring that the components in the first cavity 10 can be used normally.

A sealing member 15 is also provided between the second housing 2 and the wheel body 71, so that the second cavity 11 forms a sealed cavity, thereby preventing other substances (such as corrosive liquid) from entering the cavity, and ensuring that the components in the second cavity 11 can be used normally.

In addition, a sealing element 15 can be arranged between a plurality of shells, or between a shell and a corresponding cover body, or between a shell and a transmission piece, or a sealing element 15 can be arranged at the position where the connecting piece is connected, so that the sealing performance of each cavity is improved.

Example 5

The fall protection device provided by the present embodiment is different from the above embodiments in that the transmission shaft includes a first transmission portion and a second transmission portion (not shown in the figures), the first transmission portion and the second transmission portion are not coaxially disposed, and the first transmission portion and the second transmission portion are engaged with each other through a gear.

Specifically, the tip of first transmission portion can pass through the first gear of key-type connection, and the tip of second transmission portion can pass through the key-type connection second gear, and two gear intermeshing transmissions realize the transmission between first transmission portion and the second transmission portion and connect.

Further, the gear ratios between the first gear and the second gear are different, so that speed regulation between the first transmission part and the second transmission part is realized.

The components can be arranged on different transmission parts according to actual needs, and in order to realize connection with the components, a second locking groove 57, a key groove 58, a third locking groove 59 and the like are arranged on the corresponding transmission parts, which will not be described in detail here.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A falling protection device is characterized by comprising a transmission part, a rope return component, a rope wheel component, a buffer mechanism and a locking mechanism; the shell positioned at the outermost side is assembled through the corresponding cover body in a sealing way, so that a plurality of cavities are formed by the shells and the cover bodies;

the rope return assembly, the rope wheel assembly, the buffer mechanism and the locking mechanism are arranged in the cavities, wherein the rope return assembly, the rope wheel assembly and the locking mechanism are connected through the transmission parts; the buffer mechanism is connected with the transmission part, or the buffer mechanism is connected with the locking mechanism in a matching way.

2. A fall protection device according to claim 1, wherein each housing defines at least one receiving cavity and the housings and the outermost housing and the respective cover are connected by respective connectors.

3. The fall protection device of claim 1,

the transmission part is a transmission shaft, and the transmission shaft is provided with a second clamping groove connected with the rope returning component, a key groove or a prismatic surface in transmission connection with the rope wheel component and the locking mechanism, and a third clamping groove matched with the locking mechanism for axial positioning.

4. The fall protection device of claim 3, wherein the return line assembly comprises an adjustment ring and a return line spring;

5. The fall protection device according to claim 3, wherein the return cable assembly comprises a return cable spring, and a housing corresponding to the return cable spring is provided with a first engaging groove connected to a first mounting end of the return cable spring, and a second mounting end of the return cable spring is connected to the second engaging groove.

6. The fall protection device of claim 3, wherein the sheave assembly comprises a wheel and a rope;

7. The fall protection device of claim 3,

the locking mechanism comprises a tooth body, a swinging assembly and an elastic element;

8. The fall protection device according to claim 7, wherein the swing assembly comprises a support, a swing lock block, and a spindle;

9. The fall protection device according to claim 8, wherein the support member is connected to one end of the resilient member to form a first connection point, and the swing lock block is connected to the other end of the resilient member to form a second connection point;

10. The fall protection device according to claim 3, wherein the locking mechanism further comprises a snap spring disposed on the drive shaft through the third snap groove.

11. The fall protection device according to claim 6, wherein the damping mechanism comprises a brake plate connected to the respective housing and two sets of friction wheels arranged on either side of the brake plate;

12. The fall protection device according to claim 11, wherein the friction wheel set comprises a steel plate and a friction plate, the friction plate is disposed adjacent to the brake plate, and a first limiting surface is disposed in a central position of each of the steel plate and the friction plate, and the first limiting surface is engaged with a second limiting surface disposed on the mounting portion.

13. A fall protection device according to any one of claims 3 to 12, wherein the transmission shaft comprises a first transmission part and a second transmission part, the first transmission part and the second transmission part being arranged non-coaxially, the two transmission parts being in meshing transmission via gears.

14. A fall protection device according to any one of claims 1 to 12, wherein a seal is provided between a plurality of the housings, or between a housing and a respective cover, or between a housing and the transmission.