A new locking mechanism of a speed-difference self-controller

Abstract

The utility model discloses a novel locking mechanism of speed difference self -controller, including main installation subassembly, be provided with the installation shaft on main installation subassembly, be provided with drum wheel, ratchet on the installation shaft, drum wheel is fixedly connected with ratchet, and the locking mechanism includes the auxiliary installation subassembly of setting on main installation subassembly and located one side of ratchet, the pawl installation subassembly is symmetrically set up on the auxiliary installation subassembly, is provided with the pawl main part on the pawl installation subassembly, is provided with side installation subassembly on the side of pawl installation subassembly of the auxiliary installation subassembly, and is provided with magnetic pre -tight constraint subassembly on side installation subassembly. This technical scheme adopts " magnetic pre -tight constraint + mechanical meshing limit " dual protection mechanism, effectively avoids the problem of mistaken back -off of ratchet because of elastic potential, effectively avoids accidental unlocking because of instantaneous impact force or elastic rebound, and the locking stability and structural durability of ratchet under the working condition of big impact force are improved greatly, and more reliable safety protection guarantee is provided for high altitude operation personnel.

Description

Technical Field

[0001] This utility model relates to the field of speed difference automatic controller technology, and in particular to a novel locking mechanism for a speed difference automatic controller. Background Technology

[0002] The speed difference controller is a core safety protection device in high-altitude work scenarios. Its core working logic is as follows: when a worker falls accidentally, the locking mechanism senses the speed difference and triggers the internal pawl to engage with the ratchet, thereby quickly locking the wire rope and preventing the worker from falling further.

[0003] Traditional differential speed controllers rely on tooth engagement to lock. However, under the instantaneous impact of a fall from a height, the impact force is directly transmitted to the locking component through the steel cable. This causes elastic movement between the teeth of the ratchet and pawl. When the elastic movement exceeds the engagement length of the teeth, the pawl can easily slip to the next ratchet tooth, causing repeated fluctuations in the locking process. Furthermore, the elastic potential energy of the falling object can drive the locking device to retract, posing a safety hazard of accidental unlocking and seriously affecting the reliability and durability of the locking mechanism.

[0004] Patent search revealed application number 201110178541.X, patent title: "A Speed ​​Differential Controller," which discloses a housing and a drum wheel disposed within the housing. The housing contains a central shaft; a drum wheel and a ratchet are sleeved on the central shaft, and the drum wheel and ratchet are fixedly connected; the drum wheel is an integral structure, and a spring is installed inside the drum wheel, one end of which is fixed to the central shaft, and the other end is fixed to the drum wheel; a sling is wound around the outer surface of the drum wheel; a pawl is also provided inside the housing. The pawl is rotatably connected to the housing. One end of the pawl, located at the pivot point, is connected to the housing by a spring. Under the action of the spring, this end slides into contact with the ratchet teeth of the ratchet. The other end of the pawl, located at the pivot point, protrudes at an acute angle. When the pawl is struck at high speed by the ratchet, the acute angle protrusion engages with the ratchet teeth. During the use of this speed differential controller, elastic jumping occurs between the ratchet and the pawl teeth. When the elastic jumping exceeds the engagement length of the teeth, the pawl is prone to slipping to the next ratchet tooth, causing repeated fluctuations in the locking process and posing a safety hazard of accidental unlocking.

[0005] To address this, a novel locking mechanism for a speed difference controller was designed. Utility Model Content

[0006] The purpose of this invention is to solve the above problems by designing a novel locking mechanism for a speed difference controller.

[0007] To achieve the above objectives, the technical solution of this utility model is a novel locking mechanism for a speed differential controller, comprising a main mounting assembly, a mounting shaft on the main mounting assembly, a drum and a ratchet on the mounting shaft, the drum and the ratchet being fixedly connected, and the locking mechanism including an auxiliary mounting assembly on the main mounting assembly located on one side of the ratchet, symmetrically arranged pawl mounting assemblies on the auxiliary mounting assembly, a pawl body on the pawl mounting assembly, and a side mounting assembly on the auxiliary mounting assembly located on the side of the pawl mounting assembly, with a magnetic pre-tightening constraint assembly on the side mounting assembly. In the locked state, the magnetic pre-tightening constraint assembly attracts one end of the pawl body, and the pawl body engages with the ratchet. When the externally applied reverse driving force is greater than the attraction force of the magnetic pre-tightening constraint assembly and the ratchet retraction angle α reaches 30° or more, the pawl body disengages from the ratchet, thus reopening the locking mechanism.

[0008] As a further description of this technical solution, the main mounting assembly includes a main mounting frame, on which a mounting shaft is provided, and an auxiliary mounting assembly is provided on the main mounting frame on the ratchet side.

[0009] As a further description of this technical solution, the auxiliary mounting assembly includes an auxiliary mounting plate disposed on the main mounting assembly on one side of the ratchet, and pawl mounting assemblies are symmetrically arranged on the auxiliary mounting plate.

[0010] As a further description of this technical solution, the pawl mounting assembly includes an auxiliary shaft disposed on an auxiliary mounting assembly, and a pawl body is disposed on the auxiliary shaft.

[0011] As a further description of this technical solution, the side mounting assembly includes a side mounting seat disposed on the auxiliary mounting assembly located on the side of the pawl mounting assembly, the side mounting seat being provided with an auxiliary mounting groove, and a magnetic pre-tightening constraint assembly being disposed within the auxiliary mounting groove.

[0012] As a further description of this technical solution, the magnetic pre-tightening constraint assembly includes a square magnet disposed in an auxiliary mounting slot.

[0013] As a further description of this technical solution, the cross-sectional shape of the pawl body is L-shaped.

[0014] As a further description of this technical solution, the ratchet is provided with a plurality of ratchet teeth, a locking groove is provided on one side of the ratchet teeth, and a meshing long contact surface is provided on the ratchet at the locking groove.

[0015] Its beneficial effects are as follows: 1. This technical solution adopts a dual protection mechanism of "magnetic preload constraint + mechanical meshing limit": When the ratchet is subjected to a falling impact force, it accelerates its rotation, and the ratchet teeth on the ratchet strike the rear end of a pawl body. Inertia causes the front end of the pawl to insert into the locking groove of the next ratchet tooth on the ratchet. The radial adsorption force generated by the magnetic preload constraint component will tightly adhere to the rear end face of the pawl body, suppressing elastic runout and angular displacement between the tooth surfaces. Secondly, this technical solution further improves the anti-slip capability of the pawl body and the ratchet meshing surface by designing a retraction angle of 30° or more, a locking groove, and a long meshing contact surface. This technical solution effectively avoids the problem of false retraction caused by elastic potential energy in traditional core gears.

[0016] 2. This technical solution, by designing a retraction angle α of 30° or more, ensures that once the locking action is triggered, it will not be accidentally unlocked due to instantaneous impact or elastic rebound. This significantly improves the locking stability and structural durability of the ratchet under high impact conditions, providing more reliable safety protection for workers at heights. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of the drum wheel of this utility model; Figure 3 This is a schematic diagram of the ratchet mechanism of this utility model; Figure 4 This is a schematic diagram of the retraction angle of this utility model.

[0018] In the diagram, 1. Main mounting assembly; 2. Mounting shaft; 3. Drum wheel; 4. Ratchet; 5. Auxiliary mounting assembly; 6. Pawl mounting assembly; 7. Pawl body; 8. Side mounting assembly; 9. Magnetic pre-tightening constraint assembly; 10. Main mounting bracket; 11. Auxiliary mounting plate; 12. Auxiliary shaft; 13. Side mounting base; 14. Auxiliary mounting slot; 15. Square magnet; 16. Racket tooth; 17. Locking slot; 18. Engaging long contact surface. Detailed Implementation

[0019] First, let me explain the design intent of this utility model. The locking structure of a traditional speed-differential controller relies on the meshing of pawls to complete the locking action. However, under the instantaneous large impact force generated by a fall from a height, the impact force is directly transmitted to the locking component through the steel wire rope, causing elastic jumping between the pawl and the ratchet teeth. When the elastic jumping exceeds the meshing length of the pawl, the pawl is prone to slip to the next ratchet tooth, causing repeated fluctuations in the locking process. Moreover, the elastic potential energy of the falling object will drive the locking device to retract, posing a safety hazard of accidental unlocking and seriously affecting the reliability of the locking and the durability of the mechanism. Therefore, this utility model designs a new locking mechanism for a speed-differential controller.

[0020] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figures 1-4 As shown, a novel locking mechanism for a speed differential controller includes a main mounting assembly 1. The main mounting assembly 1 will be described in detail below. The main mounting assembly 1 includes a main mounting frame 10, on which a mounting shaft 2 is provided. An auxiliary mounting assembly 5 is provided on the main mounting frame 10 on one side of the ratchet 4.

[0021] To facilitate the installation of the drum wheel 3 and ratchet 4, a mounting shaft 2 is provided on the main mounting assembly 1, and the drum wheel 3 and ratchet 4 are mounted on the mounting shaft 2, with the drum wheel 3 and ratchet 4 fixedly connected.

[0022] To facilitate locking the wire rope, the locking mechanism will be described in detail below. The locking mechanism includes an auxiliary mounting component 5 located on the main mounting component 1 on one side of the ratchet 4. The auxiliary mounting component 5 will be described in detail below. The auxiliary mounting component 5 includes an auxiliary mounting plate 11 located on the main mounting component 1 on one side of the ratchet 4. Pawl mounting components 6 are symmetrically arranged on the auxiliary mounting plate 11.

[0023] To facilitate the installation of the pawl, a pawl mounting assembly 6 is symmetrically arranged on the auxiliary mounting assembly 5. The pawl mounting assembly 6 will be described in detail below. The pawl mounting assembly 6 includes an auxiliary shaft 12 arranged on the auxiliary mounting assembly 5, and a pawl body 7 is arranged on the auxiliary shaft 12.

[0024] A pawl body 7 is provided on the pawl mounting assembly 6, and the cross-sectional shape of the pawl body 7 is L-shaped.

[0025] To facilitate the installation of the magnetic pre-tightening constraint component 9, a side mounting component 8 is provided on the auxiliary mounting component 5 at the side of the ratchet mounting component 6. The side mounting component 8 will be described in detail below. The side mounting component 8 includes a side mounting seat 13 provided on the auxiliary mounting component 5 at the side of the ratchet mounting component 6. An auxiliary mounting groove 14 is provided on the side mounting seat 13, and the magnetic pre-tightening constraint component 9 is disposed in the auxiliary mounting groove 14.

[0026] To facilitate pre-tightening constraint, a magnetic pre-tightening constraint component 9 is provided on the side mounting component 8. The magnetic pre-tightening constraint component 9 will be described in detail below. The magnetic pre-tightening constraint component 9 includes a square magnet 15 disposed in the auxiliary mounting groove 14.

[0027] In the locked state, the magnetic pre-tightening constraint component 9 adsorbs one end of the pawl body 7, and the pawl body 7 engages with the ratchet 4. When the externally applied reverse driving force is greater than the adsorption force of the magnetic pre-tightening constraint component 9 and the ratchet 4 retracts at an angle α of 30° or more, the pawl body 7 disengages from the ratchet 4, thus restarting the locking mechanism.

[0028] The ratchet 4, as the core actuator of the locking mechanism of the speed differential controller, is the key load-bearing component for realizing the locking and unlocking actions of the wire rope. Its structural design directly determines the locking reliability and safety protection effect. In this technical solution, the ratchet 4 is formed using an integrated forging process. Several ratchet teeth 16 are provided on the ratchet 4, and a locking groove 17 is provided on one side of the ratchet teeth 16. A long meshing contact surface 18 is provided on the ratchet 4 at the locking groove 17.

[0029] The ratchet 4 is fixed on the drum 3, which is equipped with a wire rope. In the event of a fall, the ratchet 4 is locked in place by the instantaneous engagement of the ratchet 4 and the pawl body 7. This locks the ratchet 4 in place and transmits the lock to the drum 3, thus achieving emergency braking of the wire rope and preventing the worker from falling further.

[0030] In traditional speed differential controllers, the design of the ratchet 4 and pawl body 7 has a key flaw: during emergency braking, the meshing tooth profile of the pawl body 7 and the ratchet is a conventional symmetrical inclined plane, with a limited contact area and a lack of effective pre-tightening constraint structure. When a worker falls from a height, the instantaneous and enormous impact force is directly transmitted to the meshing tooth surface of the ratchet 4 through the wire rope. This impact force causes instantaneous elastic deformation between the ratchet 4 and the pawl teeth, accompanied by tooth surface slippage and elastic jump. Due to the lack of an anti-reverse constraint mechanism, the elastic potential energy of the falling object will drive the ratchet 4 to produce a reverse rebound displacement. When the rebound displacement exceeds the meshing length between the pawl and the ratchet 4, the pawl will slide from the current tooth groove into the adjacent tooth groove, causing the ratchet 4 to retract unexpectedly. This leads to an unstable state of repeated locking and unlocking of the locking mechanism, which in severe cases may even cause locking failure, posing a fatal safety hazard to the worker.

[0031] This invention addresses the aforementioned deficiencies of the ratchet 4 and pawl body 7 by making targeted improvements. While retaining its original installation and fitting dimensions, it upgrades performance through structural design and auxiliary constraints. On one hand, the meshing tooth profile design of the core ratchet 4 is optimized by adjusting the tooth groove slope angle to a 30° self-locking angle, increasing the meshing contact area with the pawl, improving the tooth surface load-bearing capacity, and simultaneously deepening the tooth groove depth to extend the insertion stroke of the pawl body 7, thereby enhancing meshing stability. On the other hand, symmetrical magnetic adsorption areas are provided on both end faces of the pawl body 7, forming a directional adsorption fit with the magnetic pre-tightening constraint component 9, providing continuous meshing constraint for the ratchet 4 through magnetic pre-tightening force.

[0032] This technical solution adopts a dual protection mechanism of "magnetic preload constraint + mechanical meshing limit": when the ratchet 4 is subjected to falling impact force in the locked state, the radial adsorption force generated by the magnetic preload constraint component 9 will tightly adhere to the end face of the pawl body 7, suppressing the elastic runout and angular deviation between the tooth surfaces. Secondly, this technical solution further improves the anti-slip capability of the meshing surface between the pawl body 7 and the ratchet 4 by designing a retraction angle α of 30° or more and locking groove 17 and meshing long contact surface 18. This technical solution effectively avoids the problem of false retraction caused by elastic potential energy in traditional core gears.

[0033] Through actual testing and verification, this technical solution enables the ratchet 4 in the locked state to have a clear retraction threshold. When the externally applied reverse driving force is greater than the attraction force of the magnetic pre-tightening constraint component 9 and the ratchet 4 retraction angle reaches 30° or more, the pawl body 7 disengages from the ratchet 4, thereby realizing the reopening of the locking mechanism.

[0034] This technical solution, by designing a retraction angle of 30° or more, ensures that once the locking action is triggered, it will not be accidentally unlocked due to instantaneous impact or elastic rebound. This significantly improves the locking stability and structural durability of the ratchet 4 under high impact conditions, providing more reliable safety protection for workers at heights.

[0035] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A novel locking mechanism for a speed differential controller, comprising a main mounting assembly (1), wherein a mounting shaft (2) is provided on the main mounting assembly (1), and a drum wheel (3) and a ratchet wheel (4) are provided on the mounting shaft (2), characterized in that, The drum (3) is fixedly connected to the ratchet (4). The locking mechanism includes an auxiliary mounting component (5) located on the main mounting component (1) on one side of the ratchet (4). A pawl mounting component (6) is symmetrically arranged on the auxiliary mounting component (5). A pawl body (7) is arranged on the pawl mounting component (6). A side mounting component (8) is arranged on the auxiliary mounting component (5) on the side of the pawl mounting component (6). A magnetic pre-tightening constraint component (9) is arranged on the side mounting component (8). In the locked state, the magnetic pre-tightening constraint component (9) attracts one end of the pawl body (7). The pawl body (7) engages with the ratchet (4). When the externally applied reverse driving force is greater than the attraction force of the magnetic pre-tightening constraint component (9) and the ratchet (4) retraction angle α reaches 30° or more, the pawl body (7) disengages from the ratchet (4), thereby restarting the locking mechanism.

2. The novel locking mechanism of the speed difference controller according to claim 1, characterized in that, The main mounting assembly (1) includes a main mounting bracket (10), on which a mounting shaft (2) is provided, and an auxiliary mounting assembly (5) is provided on the main mounting bracket (10) on one side of the ratchet (4).

3. The novel locking mechanism of the speed difference controller according to claim 1, characterized in that, The auxiliary mounting assembly (5) includes an auxiliary mounting plate (11) disposed on the main mounting assembly (1) on one side of the ratchet (4), and pawl mounting assemblies (6) are symmetrically disposed on the auxiliary mounting plate (11).

4. The novel locking mechanism of the speed difference controller according to claim 1, characterized in that, The pawl mounting assembly (6) includes an auxiliary shaft (12) disposed on the auxiliary mounting assembly (5), on which a pawl body (7) is disposed.

5. The novel locking mechanism of the speed difference controller according to claim 1, characterized in that, The side mounting assembly (8) includes a side mounting seat (13) located on the side of the pawl mounting assembly (6) on the auxiliary mounting assembly (5). The side mounting seat (13) is provided with an auxiliary mounting groove (14), and a magnetic pre-tightening constraint assembly (9) is provided in the auxiliary mounting groove (14).

6. The novel locking mechanism of the speed difference controller according to claim 1, characterized in that, The magnetic pre-tightening constraint assembly (9) includes a square magnet (15) disposed in the auxiliary mounting slot (14).

7. A novel locking mechanism for a speed difference controller according to claim 1, characterized in that, The cross-sectional shape of the pawl body (7) is L-shaped.

8. A novel locking mechanism for a speed difference controller according to claim 1, characterized in that, The ratchet (4) is provided with a plurality of ratchet teeth (16), and a locking groove (17) is provided on one side of the ratchet teeth (16). A meshing long contact surface (18) is provided on the ratchet (4) at the locking groove (17).

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