High-stability descent control device adaptive to escape
By designing a stabilizing mechanism and auxiliary mechanisms, the problems of rope breakage and friction plate thermal failure are solved, achieving stability and safety of the descent device and ensuring that the rope maintains uniform spacing and linear motion during the retrieval and deployment process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SEA SUN PROTECTIVE EQUIP CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-19
AI Technical Summary
Existing descent devices are prone to rope breakage due to centrifugal force or vibration during repeated rope retrieval and release, and the friction plate locking device is prone to thermal failure under high load, making it impossible to achieve mechanical locking.
The system employs a stabilizing mechanism and an auxiliary mechanism. The stabilizing mechanism forms a mechanical self-locking effect by having multiple points of contact between the locking blocks and the rope surface. The auxiliary mechanism uses a double-circle structure to limit the lateral displacement and serpentine swing of the rope, ensuring uniform rope spacing and linear motion.
It effectively prevents rope breakage, ensures uniform spacing of the rope during release and retrieval, avoids rope breakage due to centrifugal force or vibration, and achieves stable mechanical locking and linear motion.
Smart Images
Figure CN224251955U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of escape equipment technology, specifically a highly stable escape-adaptive descent device. Background Technology
[0002] A descent device is a safety device used for emergency escape or high-altitude operations. Its core structure includes a rope winding mechanism, a braking device, and a guiding assembly. During operation, it connects to the person or load via a rope and controls the descent speed using friction braking or centrifugal force. It is primarily used in scenarios such as high-rise building fire escapes and industrial equipment maintenance. Its core function is to convert potential energy into controllable kinetic energy, ensuring that personnel descend at a safe speed.
[0003] Publication number CN213192193U describes a descent device, in which multiple magnetic components are located on the side of the upper and lower deceleration plates near the ratchet. It boasts advantages such as simple structure, convenient operation, and stable safety. However, during repeated rope retraction and release, centrifugal force or vibration can cause changes in the rope loop spacing, leading to rope breakage or knotting. Existing locking devices mostly employ friction plate structures, which are prone to thermal failure under high loads and cannot achieve mechanical locking.
[0004] Therefore, in order to address the shortcomings of the existing system, we conducted research and improvements and proposed a highly stable escape-adaptive descent device. Utility Model Content
[0005] The purpose of this invention is to provide a highly stable escape descent device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a highly stable escape descent device, comprising: an inner tube, a locking mechanism and an auxiliary mechanism, wherein an outer shell is provided on the outer side of the inner tube, a round hole is provided at the top of the outer shell, a rope is annularly sleeved on the outer side of the inner tube, a round groove block is provided at the front end of the inner tube, a bottom groove is provided at the bottom end of the outer shell, and an auxiliary mechanism is provided on one side of the bottom groove;
[0007] The stabilizing mechanism is used to prevent the rope from collapsing.
[0008] Furthermore, the locking mechanism includes a cover plate, an insert shaft, and a locking block. The insert shaft is inserted into the inner side of the circular groove block, and the cover plate is provided on the outer side of the insert shaft. A locking block is provided in a ring at one end of the cover plate near the outer shell, and a groove is provided at the bottom end of the locking block.
[0009] Furthermore, the insertion shaft and the circular groove block are connected by an insertion joint.
[0010] Furthermore, the length of the card block is greater than the thickness of the circular groove block.
[0011] Furthermore, the auxiliary mechanism includes a side block, a front convex disc, a rotating shaft, a rear disc, and a receiving rod. A side block is provided on one side of the bottom groove, and a rotating shaft is rotatably provided at both ends of the side block. A receiving rod is provided at one end of the rotating shaft, and a rear disc and a front convex disc are provided on the outer side of the receiving rod.
[0012] Furthermore, the center of the rear circular piece and the center of the front convex circular piece are on the same straight line.
[0013] Furthermore, the rotating shaft rotates downwards in one direction to 45 degrees.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. The locking mechanism of this utility model forms multi-point contact with the rope surface through the concave and convex grooves at the bottom of the locking block, generating a mechanical self-locking effect when the rope is under load. The length of the locking block exceeds the thickness of the circular groove block by 15mm, ensuring that the toothed groove is fully embedded in the gap between the rope loops, forming a stable mechanical locking structure. This design keeps the rope loop spacing uniform during the rope winding and unwinding process, effectively preventing the rope from collapsing due to centrifugal force or vibration.
[0016] 2. The auxiliary mechanism of this utility model adopts a double circular plate structure. The front convex circular plate and the rear circular plate are connected by a unidirectional rotating shaft. When the rope is under force, the circular plate assembly can rotate downward by 45° around the shaft. The friction between the edge of the circular plate and the rope restricts the lateral displacement. The supporting rod rigidly connects the two circular plates to form a three-point support structure, which suppresses serpentine swing during the rope movement and keeps the rope in a straight line trajectory. Attached Figure Description
[0017] Figure 1 This is a side view of the appearance structure of this utility model;
[0018] Figure 2 This is a top view of the structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the structure of this utility model from below;
[0020] Figure 4 This is a schematic diagram of the axial side view structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the auxiliary mechanism of this utility model.
[0022] In the diagram: 1. Inner tube; 2. Outer shell; 3. Bottom groove; 4. Auxiliary mechanism; 41. Side block; 42. Forward protruding disc; 43. Rotating shaft; 44. Rear disc; 45. Supporting rod; 5. Cover plate; 6. Locking block; 7. Circular groove block; 8. Rope; 9. Circular hole; 10. Insert shaft. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] like Figures 1-5 As shown, a highly stable escape-adaptive descent device includes: an inner tube 1, a locking mechanism and an auxiliary mechanism 4. An outer shell 2 is provided on the outer side of the inner tube 1. A circular hole 9 is provided at the top of the outer shell 2. A rope 8 is annularly sleeved on the outer side of the inner tube 1. A circular groove block 7 is provided at the front end of the inner tube 1. A bottom groove 3 is provided at the bottom end of the outer shell 2. An auxiliary mechanism 4 is provided on one side of the bottom groove 3.
[0025] The stabilizing mechanism is used to prevent the rope 8 from collapsing.
[0026] The stabilizing mechanism includes a cover plate 5, an insert shaft 10, and a locking block 6. The insert shaft 10 is inserted into the inner side of the circular groove block 7, and the cover plate 5 is provided on the outer side of the insert shaft 10. The locking block 6 is provided in a ring at one end of the cover plate 5 near the outer shell 2, and the bottom end of the locking block 6 is provided with a groove.
[0027] The rest are as follows: since the outer diameter of the inner cylinder 1 matches the inner diameter of the outer shell 2, the two form a sliding fit. The top of the outer shell 2 has a 12mm diameter circular hole 9 with a 3mm wide chamfer on the edge of the circular hole 9. The outer surface of the inner cylinder 1 is provided with 3 sets of spiral guide grooves, each with a depth of 2mm and a pitch of 15mm.
[0028] In addition, the stabilizing mechanism consists of a cover plate 5, a shaft 10, and a locking block 6. The cover plate 5 is made of Q235 steel with a thickness of 5mm and a width that is the same as the width of the front of the outer shell 2. The shaft 10 has a diameter of 8mm and a length of 20mm, and forms an H7 / g6 fit with the insertion hole of the circular groove block 7. The locking block 6 adopts a trapezoidal cross-section design with a height of 10mm and a triangular toothed groove with a depth of 2mm on the bottom surface. The toothed groove spacing is 3mm. The locking block 6 is fixedly connected to the cover plate 5 by M6 bolts. The end of the locking block 6 extends 15mm beyond the rear end face of the circular groove block 7.
[0029] The auxiliary mechanism 4 includes a side block 41, a front convex disc 42, a rotating shaft 43, a rear disc 44, and a support rod 45. The side block 41 is welded to the right side of the bottom groove 3. The side block 41 is 8mm thick and 30mm high. The rotating shaft 43 is 10mm in diameter and 40mm in length. Both ends are connected to the side block 41 through deep groove ball bearings. The front convex disc 42 and the rear disc 44 are both steel discs with a diameter of 50mm. The center hole is interference-fitted with the rotating shaft 43. The support rod 45 is 6mm in diameter and 80mm in length. Both ends are fixed to the front convex disc 42 and the rear disc 44 through threads.
[0030] Finally, the 8mm diameter escape rope is wound into the spiral groove of the built-in cylinder 1, with the rope end passing through the round hole 9. The cover plate 5 is positioned with the round groove block 7 via the insert shaft 10. The toothed groove of the locking block 6 is embedded in the gap of the rope loop. When the rope 8 is under tension, the toothed groove of the locking block 6 generates friction with the rope loop, limiting the loosening of the rope 8. In the auxiliary mechanism 4, the rope 8 passes through the gap between the front protruding round plate 42 and the rear round plate 44. The rotating shaft 43 allows the round plate assembly to rotate 45° in one direction. When the rope 8 moves downward, the round plate assembly follows the rotation through friction, limiting the lateral displacement of the rope 8.
[0031] like Figures 1-5 As shown, a highly stable escape-adaptive descent device includes an auxiliary mechanism 4 comprising a side block 41, a front convex disc 42, a rotating shaft 43, a rear disc 44, and a receiving rod 45. A side block 41 is provided on one side of the bottom groove 3. A rotating shaft 43 is rotatably mounted at both ends of the side block 41. A receiving rod 45 is provided at one end of the rotating shaft 43. A rear disc 44 and a front convex disc 42 are provided on the outer side of the receiving rod 45.
[0032] The rest are made of aluminum alloy, with an outer diameter of 40mm and a length of 150mm. The outer shell 2 is made of two parts connected by 4 M8 bolts. The top round hole 9 has a diameter of 15mm and the bottom groove 3 has a width of 20mm.
[0033] The stabilizing mechanism adopts a detachable design, including a cover plate 5, a shaft 10, and two sets of locking blocks 6. The cover plate 5 has a through hole with a diameter of 8mm in the middle. The shaft 10 is fixed to the cover plate 5 by interference fit. The locking blocks 6 are made of spring steel, are 30mm long, and have a serrated structure at the end with a serration angle of 60°. The locking blocks 6 are connected to the cover plate 5 by a pin with a diameter of 5mm. The locking blocks 6 can rotate ±15° around the pin.
[0034] The auxiliary mechanism 4 adopts a double-shaft structure, including a side block 41, two sets of shafts 43 and a circular plate assembly. The side block 41 is provided with two bearing holes with a diameter of 12mm and a spacing of 50mm. The shafts 43 have a diameter of 10mm and a length of 60mm, and deep groove ball bearings are installed at both ends. The circular plate assembly consists of a front convex circular plate 42, a middle circular plate 46 and a rear circular plate 44. The three circular plates are fixed to the shafts 43 by bolts with a plate spacing of 10mm. The front convex circular plate 42 and the rear circular plate 44 have a diameter of 60mm, and the middle circular plate 46 has a diameter of 40mm.
[0035] In addition, when the rope 8 is wound around the inner tube 1, the locking block 6 remains horizontal under the action of the spring. After the cover plate 5 is installed, the insert shaft 10 is positioned with the circular groove block 7, and the saw teeth of the locking block 6 are embedded in the rope loop. When the rope 8 is under force, the locking block 6 rotates under the action of tension, and the saw teeth and the rope loop produce a self-locking effect. In the auxiliary mechanism 4, the rope 8 passes through the middle circular plate 46 and the front convex circular plate 42 in sequence. The double rotating shaft structure allows the circular plate assembly to rotate within the range of 0-45°. Through the stepped contact of the three circular plates, the serpentine swing of the rope 8 is effectively suppressed.
[0036] Working principle: When using this high-stability escape adapter, first put the rope 8 into the inside of the outer shell 2, then roll the rope 8 into a circular loop and put it on the outside of the inner tube 1, so that the front end of the rope 8 abuts against the rear side of the circular groove block 7. Then, the cover plate 5 is inserted into the front of the outer shell 2. At this time, the insert shaft 10 in the middle of one side of the cover plate 5 is inserted into the inner side of the circular groove block 7, and the locking block 6 is embedded in the inner side of the outer shell 2. Because the bottom of the locking block 6 has an uneven structure, the bottom of the locking block 6 abuts against the outside of the rope 8, so that the bottom of the locking block 6 is locked on the outer loop of the rope 8 when it is rolled up.
[0037] When rope 8 is pulled out, one end of rope 8 passes through the middle of the bottom groove 3, and both sides of one end of rope 8 are held in place by the rear circular plate 44 and the front convex circular plate 42. Since the side block 41 is fixedly connected to the bottom groove 3, when rope 8 is pulled, the rear circular plate 44 and the front convex circular plate 42 rotate with the outside of rope 8. Since the rotating shaft 43 rotates outside the side block 41, and the rotating shaft 43 can only rotate downwards by 45 degrees outside the side block 41, when the rotating shaft 43 can no longer rotate, the front convex circular plate 42 and the rear circular plate 44 restrict the movement space outside rope 8. At the same time, the receiving rod 45 connects the rear circular plate 44 and the front convex circular plate 42. At this time, the rear circular plate 44 and the front convex circular plate 42 prevent rope 8 from swaying left and right. This is the working principle of this high-stability escape adapter descent device.
[0038] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A high stability escape fitted descent control comprising: The built-in cylinder (1), the stabilizing mechanism and the auxiliary mechanism (4) are characterized in that the outer side of the built-in cylinder (1) is provided with a shell (2), the top of the shell (2) is provided with a round hole (9), the outer side of the built-in cylinder (1) is provided with a rope (8) in an annular shape, the front end of the built-in cylinder (1) is provided with a round groove block (7), the bottom end of the shell (2) is provided with a bottom groove (3), and the side of the bottom groove (3) is provided with an auxiliary mechanism (4). The stabilizing mechanism is used to prevent the rope (8) from collapsing.
2. A high stability escape fitted descent control device according to claim 1, wherein, The stabilizing mechanism includes a cover plate (5), an insert shaft (10), and a locking block (6). The insert shaft (10) is inserted into the inner side of the circular groove block (7), and the cover plate (5) is provided on the outer side of the insert shaft (10). The locking block (6) is provided in a ring at one end of the cover plate (5) near the outer shell (2), and the bottom end of the locking block (6) is provided with a groove.
3. A high stability escape fitted descent control device according to claim 2, wherein, The insertion shaft (10) and the circular groove block (7) are connected by insertion.
4. A high stability escape fitted descent control device according to claim 2, wherein, The length of the card block (6) is greater than the thickness of the circular groove block (7).
5. A high stability escape fitted descent control device as claimed in claim 1, wherein, The auxiliary mechanism (4) includes a side block (41), a front convex disc (42), a rotating shaft (43), a rear disc (44), and a receiving rod (45). A side block (41) is provided on one side of the bottom groove (3). A rotating shaft (43) is rotatably provided at both ends of the side block (41). A receiving rod (45) is provided at one end of the rotating shaft (43). A rear disc (44) and a front convex disc (42) are provided on the outer side of the receiving rod (45).
6. A high stability escape fitted descent control device according to claim 5, wherein, The center of the rear circular piece (44) and the center of the front convex circular piece (42) are on the same straight line.
7. A high stability escape fitted descent control device according to claim 5, wherein, The shaft (43) rotates downwards in one direction to 45 degrees.