A fall arrest system and a fall arrest device using the same

Abstract

The utility model relates to a kind of stop falling systems, including first shell, second shell and with thorn rotating wheel;The rectangular cross section ring groove is provided in the cooperation position of second shell and with thorn rotating wheel, the corrugated spring is provided in the rectangular cross section ring groove, the corrugated spring is provided with several arc troughs and several arc peaks, after the rectangular cross section ring groove is loaded into the corrugated spring, the several arc troughs and the groove bottom of rectangular cross section ring groove abut, the several arc peaks and with thorn rotating wheel inner circle face abut.In use, the elastic force formed between second shell and with thorn rotating wheel by the several arc troughs and the several arc peaks of corrugated spring setting can generate damping, and corrugated spring can be self-adapting adjustment, even if the rectangular cross section ring groove position roundness is not enough due to pouring or machining precision problem at the cooperation place of second shell and with thorn rotating wheel, and with thorn rotating wheel inner circle surface roundness is not enough and other problems, also will not have influence on it.

Description

Technical Field

[0001] This utility model belongs to the field of outdoor products, and specifically relates to a fall arrest system and a fall arrest device using the system. Background Technology

[0002] For safety reasons, it is often necessary to install rope stop devices on rappelling ropes during mountaineering, rappelling, rescue, and outdoor sports. Currently, many fall arrest devices have appeared on the market, such as patent application number 202010050878.1, entitled "A Fall Arrest Device for Ropes," which includes a housing, a fall arrest system, a control mechanism, and a connecting mechanism. The fall arrest system includes a first housing, a second housing, and a barbed wheel. Several stop modules are pivotally connected inside the barbed wheel, and a balance spring is also provided at the pivot point between the stop modules and the barbed wheel. At the same time, the rotation speed of the barbed wheel is reduced by the interference fit of O-rings at the mating position of the second housing and the barbed wheel, making the rotation of the barbed wheel smoother and more uniform. However, in the actual production and processing process, problems with the casting or processing accuracy at the mating point of the second housing and the barbed wheel lead to insufficient roundness of the O-ring position, insufficient roundness of the inner surface of the barbed wheel, or unevenness or flash during the injection molding of the O-ring, resulting in uneven damping after the second housing and the barbed wheel are mated. Furthermore, the O-ring will age and harden after long-term use, causing the performance of the fall arrest system to decline. Utility Model Content

[0003] This invention addresses the technical problems existing in this field by providing a fall arrest system and a fall arrest device using the system.

[0004] This utility model provides a fall arresting system to solve the above-mentioned technical problems, including a first housing, a second housing, and a barbed wheel; the second housing is provided with a rectangular cross-section annular groove at the position where it mates with the barbed wheel, and a corrugated spring is provided in the rectangular cross-section annular groove. The corrugated spring is provided with a plurality of arc-shaped troughs and a plurality of arc-shaped peaks. After the corrugated spring is inserted into the rectangular cross-section annular groove, the plurality of arc-shaped troughs abut against the bottom of the rectangular cross-section annular groove, and the plurality of arc-shaped peaks abut against the inner circular surface of the barbed wheel.

[0005] Furthermore, the corrugated spring is formed by stamping a thin sheet of metal. After the corrugated spring is inserted into the rectangular cross-section annular groove, the connection point is located at the trough of the arc and abuts against the bottom of the rectangular cross-section annular groove.

[0006] Furthermore, the barbed wheel is pivotally connected with several stop modules, and the second housing is provided with an arc-shaped stop boss that cooperates with the stop modules. The stop modules are set inside the barbed wheel through a limiting block and a pin. A balance spring is also provided at the pivot position between the stop modules and the barbed wheel. The stop modules, the limiting block and the barbed wheel are a whole and can rotate relative to the second housing.

[0007] Furthermore, the fall arresting system also includes a manual stop mechanism, which includes several stop grooves on the limiting block and stop ribs on the second housing that match the stop grooves. The stop ribs can be controlled by a toggle handle connected to them to engage or disengage from the stop grooves.

[0008] The fall arresting device employing the above-mentioned fall arresting system includes a housing, a control mechanism, and a connecting mechanism. The housing is provided with a rope placement groove. The fall arresting system is pivotally connected to the housing and can be controlled by the control mechanism to keep the rope placement groove in a closed state and an open state. The closed state is used to stop the rope in the rope placement groove in the event of a fall, and the open state is used to release the passage of the rope placement groove to load or unload the rope.

[0009] Furthermore, the control mechanism includes a control slider that can slide along the pivot post of the fall arrest system and abut against the fall arrest system, and a control handle that is pivotally connected to the control slider. The control slider is provided with a drive arc segment and a locking interface that allow the fall arrest system to respectively put the rope placement slot in a closed state and an open state. The control handle is provided with a control head that can slide between the drive arc segment and the locking interface. When the control head of the control handle is in the drive arc segment position of the control slider, the fall arrest system puts the rope placement slot in a closed state. When the control slider is pushed upward and the control head of the control handle is in the locking interface of the control slider, the entire fall arrest system can rotate counterclockwise along the pivot axis, causing the rope placement slot to open, so that the rope can be placed in the rope placement slot or taken out of the rope placement slot.

[0010] Furthermore, the fall arresting system has drive torsion springs in both closed and open states; the control handle is also equipped with a reset torsion spring.

[0011] This utility model relates to a fall arresting system, comprising a first housing, a second housing, and a barbed wheel. A rectangular cross-section annular groove is provided at the mating position between the second housing and the barbed wheel. A corrugated spring is disposed within the rectangular cross-section annular groove, the corrugated spring having several arc-shaped troughs and several arc-shaped peaks. After the corrugated spring is inserted into the rectangular cross-section annular groove, the several arc-shaped troughs abut against the bottom of the groove, and the several arc-shaped peaks abut against the inner circular surface of the barbed wheel. In use, the elastic force formed between the second housing and the barbed wheel by the several arc-shaped troughs and several arc-shaped peaks of the corrugated spring generates damping. Furthermore, the corrugated spring can adaptively adjust, so even if problems arise such as insufficient roundness of the rectangular cross-section annular groove or insufficient roundness of the inner circular surface of the barbed wheel due to casting or machining precision issues at the mating point between the second housing and the barbed wheel, it will not have an impact. Attached Figure Description

[0012] Figure 1 and Figure 2 Schematic diagram of the explosion structure of the fall arrest system;

[0013] Figure 3 A schematic diagram of the corrugated damper structure of a fall arrestor system;

[0014] Figure 4 and Figure 5 Schematic diagram of the fall arrestor;

[0015] Figure 6 A cross-sectional structural diagram of the fall arrestor. Detailed Implementation

[0016] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments of the present invention; however, these descriptions are intended to illustrate the general principles of the invention and are not intended to limit its scope. The scope of protection of this invention is determined by the appended claims.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings. The directional terms such as "upper", "lower", "left", "right", "inner" and "outer" described in the specification are only for better understanding and explanation, and are not intended to limit the present invention. Example

[0018] like Figure 1-3 as well as Figure 6 As shown, a fall arresting system 2 includes a first housing 2a, a second housing 2d, and a barbed wheel 2b. A rectangular cross-section annular groove 2d2 is provided at the mating position between the second housing 2d and the barbed wheel 2b. A corrugated spring piece 2d3 is provided within the rectangular cross-section annular groove 2d2. The corrugated spring piece 2d3 has several arc-shaped troughs 2d3-1 and several arc-shaped peaks 2d3-2. After the corrugated spring piece 2d3 is inserted into the rectangular cross-section annular groove 2d2, the several arc-shaped troughs 2d3-1 abut against the bottom of the rectangular cross-section annular groove 2d2, and the several arc-shaped peaks 2d3-2 abut against the inner circular surface of the barbed wheel 2b.

[0019] When using it, such as Figure 6 As shown, the elastic force formed between the bottom of the rectangular cross-section annular groove 2d2 of the second housing 2d and the inner circular surface of the barbed wheel 2b by the several arc-shaped troughs 2d3-1 and several arc-shaped peaks 2d3-2 set by the corrugated spring sheet 2d3 can generate damping. Furthermore, the corrugated spring sheet 2d3 can be adaptively adjusted. Even if the roundness of the rectangular cross-section annular groove 2d2 is insufficient due to casting or machining accuracy problems at the joint between the second housing 2d and the barbed wheel 2b, or if the roundness of the inner circular surface of the barbed wheel 2b is insufficient, it will not have any impact. Compared with the existing technology that uses O-rings, the performance is more stable and the practicality is better.

[0020] Preferably, the corrugated spring sheet 2d3 is formed by stamping a thin metal sheet. After the corrugated spring sheet 2d3 is inserted into the rectangular cross-section annular groove 2d2, the connection point 2d3-3 is located at the position of the arc-shaped trough 2d3-1 and abuts against the bottom of the rectangular cross-section annular groove 2d2. The corrugated spring sheet 2d3 is formed by stamping a thin metal sheet, which is convenient for processing. During assembly, it can be slightly rolled and deformed before being inserted into the rectangular cross-section annular groove 2d2 and then assembled with the barbed wheel 2b, which is also convenient for assembly.

[0021] More preferably, a plurality of stop modules 2f are pivotally connected inside the barbed wheel 2b, and the second housing 2d is provided with an arc-shaped stop boss 2d1 that cooperates with the stop modules 2f. The stop modules 2f are set inside the barbed wheel 2b through a limiting block 2c and a pin. A balance spring 2g is also provided at the pivotal position between the stop modules 2f and the barbed wheel 2b. The stop modules 2f, the limiting block 2c and the barbed wheel 2b are a whole and can rotate relative to the second housing 2d.

[0022] More preferably, the fall arresting system 2 further includes a manual stop mechanism 2e, which includes a plurality of stop grooves 2c1 provided on the limiting block 2c and stop ribs provided on the second housing 2d that are compatible with the stop grooves 2c1. The stop ribs can be controlled by a toggle handle 2e1 connected thereto to engage or disengage from the stop grooves 2c1.

[0023] like Figures 4-6 As shown, the fall arresting device employing the above-mentioned fall arresting system includes a housing 1, a control mechanism 3, and a connecting mechanism 4. The housing 1 is provided with a rope placement groove 1a. The fall arresting system 2 is pivotally connected to the housing 1 and can be controlled by the control mechanism 3 to keep the rope placement groove 1a in a closed state and an open state. The closed state is used to stop the rope in the rope placement groove 1a in the event of a fall, and the open state is used to release the passage of the rope placement groove 1a to load or unload the rope.

[0024] Preferably, the control mechanism 3 includes a control slider 3b that can slide along the pivot post of the fall arresting system 2 and abut against the fall arresting system 2, and a control handle 3a that is pivotally connected to the control slider 3b. The control slider 3b is provided with a drive arc segment 3b2 and a locking interface 3b1 that allow the fall arresting system 2 to respectively put the rope placement slot 1a in a closed state and an open state. The control handle 3a is provided with a control head 3a1 that can slide between the drive arc segment 3b2 and the locking interface 3b1. When the control head 3a1 of the control handle 3a is in the position of the drive arc segment 3b2 of the control slider 3b, the fall arresting system 2 puts the rope placement slot 1a in a closed state. When the control slider 3b is pushed upward and the control head 3a1 of the control handle 3a is placed in the locking interface 3b1 of the control slider 3b, the fall arresting system 2 as a whole can rotate counterclockwise along the pivot axis, causing the rope placement slot 1a to be in an open state, so that the rope can be placed in the rope placement slot 1a or taken out of the rope placement slot 1a.

[0025] In normal use, the rope is placed in the rope placement groove 1a, and the connecting mechanism 4 is connected to the operator's safety belt or protective belt via a connecting hook, etc. As the operator ascends with the rope, the fall arresting device rises along with the rope. At this time, the stop module 2f is in a balanced state within the barbed wheel 2b under the action of the balance spring 2g, and can rotate clockwise or counterclockwise synchronously and uniformly with the barbed wheel 2b driven by the rope, thus moving up or down with the operator along the rope. When the operator suddenly falls, the barbed wheel 2b will rotate rapidly. At this time, the stop module 2f, under the action of inertia, overcomes the force of the balance spring 2g and rotates outward, engaging with the stop boss 2d1 on the second housing 2d, causing the barbed wheel 2b to stop rotating and engaging with the rope through the barbs, thus stopping the fall and ensuring the operator's safety.

[0026] More preferably, the fall arresting system 2 is provided with a drive torsion spring 2h that keeps the fall arresting system 2 in a closed state and an open state; the control handle 3a is also provided with a reset torsion spring 3c.

[0027] This utility model relates to a fall arresting system, comprising a first housing, a second housing, and a barbed wheel. A rectangular cross-section annular groove is provided at the mating position between the second housing and the barbed wheel. A corrugated spring is disposed within the rectangular cross-section annular groove, the corrugated spring having several arc-shaped troughs and several arc-shaped peaks. After the corrugated spring is inserted into the rectangular cross-section annular groove, the several arc-shaped troughs abut against the bottom of the groove, and the several arc-shaped peaks abut against the inner circular surface of the barbed wheel. In use, the elastic force formed between the second housing and the barbed wheel by the several arc-shaped troughs and several arc-shaped peaks of the corrugated spring generates damping. Furthermore, the corrugated spring can adaptively adjust, so even if problems arise such as insufficient roundness of the rectangular cross-section annular groove or insufficient roundness of the inner circular surface of the barbed wheel due to casting or machining precision issues at the mating point between the second housing and the barbed wheel, it will not have an impact.

[0028] The foregoing description illustrates and describes preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A fall arresting system (2), comprising a first housing (2a), a second housing (2d), and a spiked wheel (2b); characterized in that: The second housing (2d) is provided with a rectangular cross-section annular groove (2d2) at the mating position with the barbed wheel (2b). A corrugated spring piece (2d3) is provided in the rectangular cross-section annular groove (2d2). The corrugated spring piece (2d3) is provided with a number of arc-shaped troughs (2d3-1) and a number of arc-shaped peaks (2d3-2). After the corrugated spring piece (2d3) is inserted into the rectangular cross-section annular groove (2d2), the number of arc-shaped troughs (2d3-1) abut against the bottom of the rectangular cross-section annular groove (2d2), and the number of arc-shaped peaks (2d3-2) abut against the inner circular surface of the barbed wheel (2b).

2. A fall arrest system (2) as claimed in claim 1, characterised in that: The corrugated spring sheet (2d3) is formed by stamping a thin sheet of metal. After the corrugated spring sheet (2d3) is inserted into the rectangular cross-section annular groove (2d2), the connection point (2d3-3) is located at the position of the arc-shaped trough (2d3-1) and abuts against the bottom of the rectangular cross-section annular groove (2d2).

3. A fall arrest system (2) as claimed in claim 1 or 2, characterised in that: A plurality of stop modules (2f) are pivotally connected inside the barbed wheel (2b). The second housing (2d) is provided with an arc-shaped stop boss (2d1) that cooperates with the stop modules (2f). The stop modules (2f) are set inside the barbed wheel (2b) through a limiting block (2c) and a pin. A balance spring (2g) is also provided at the pivot position between the stop modules (2f) and the barbed wheel (2b). The stop modules (2f), the limiting block (2c) and the barbed wheel (2b) are a whole and can rotate relative to the second housing (2d).

4. A fall arrest system (2) as claimed in claim 3, characterised in that: The fall arresting system (2) also includes a manual stop mechanism (2e), which includes a plurality of stop grooves (2c1) provided on the limiting block (2c) and stop ribs provided on the second housing (2d) that are compatible with the stop grooves (2c1). The stop ribs can be controlled by a toggle handle (2e1) connected thereto to engage or disengage from the stop grooves (2c1).

5. A fall arrest device employing a fall arrest system (2) as claimed in claim 1 or 2 or 4 characterised in that: The system includes a housing (1), a control mechanism (3), and a connecting mechanism (4). The housing (1) is provided with a rope placement groove (1a). The fall arresting system (2) is pivotally connected to the housing (1) and can be controlled by the control mechanism (3) to keep the rope placement groove (1a) in a closed state and an open state. The closed state is used to stop the rope in the rope placement groove (1a) by the fall arresting system (2) in the event of a fall. The open state is used to release the passage of the rope placement groove (1a) to load or unload the rope.

6. The fall arrest device of claim 5, wherein: The control mechanism (3) includes a control slider (3b) that can slide along the pivot post of the fall arresting system (2) and abut against the fall arresting system (2), and a control handle (3a) that is pivotally connected to the control slider (3b). The control slider (3b) is provided with a drive arc segment (3b2) and a locking interface (3b1) that allow the fall arresting system (2) to respectively put the rope placement slot (1a) in a closed state and an open state. The control handle (3a) is provided with a control head (3a1) that can slide between the drive arc segment (3b2) and the locking interface (3b1). When the control handle (3a1) is in a closed state, the control head (3a1) can slide between the drive arc segment (3b2) and the locking interface (3b1). When the control head (3a1) is in the drive arc (3b2) position of the control slider (3b), the fall arrest system (2) keeps the rope placement slot (1a) closed. When the control slider (3b) is pushed upward and the control head (3a1) of the control handle (3a) is in the locking interface (3b1) of the control slider (3b), the fall arrest system (2) can rotate counterclockwise along the pivot axis, causing the rope placement slot (1a) to be in the open state, so that the rope can be placed in the rope placement slot (1a) or taken out of the rope placement slot (1a).

7. The fall arrest device of claim 6, wherein: The fall arresting system (2) is provided with a drive torsion spring (2h) to keep the fall arresting system (2) in a closed state and an open state; the control handle (3a) is also provided with a reset torsion spring (3c).

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