Linear displacement driving self-locking mechanism
By designing a linear displacement driven self-locking mechanism, and utilizing the cooperation between the sliding plate and the locking claw, as well as the torsion spring structure, automatic locking and unlocking are achieved. This solves the limitations of traditional locking devices in terms of positional accuracy and dynamic holding, and improves safety and ease of operation.
Patent Information
- Application Number
- CN202520637742.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-07
AI Technical Summary
Traditional locking devices have limitations in terms of positional accuracy and dynamic retention, and require manual locking, which is cumbersome and poses safety hazards.
Design a linear displacement driven self-locking mechanism. Through the cooperation of a sliding plate and a locking claw, and by utilizing the structure of a torsion spring and a bracket lock, self-locking and unlocking are achieved. The sliding plate automatically locks when sliding on the support plate, and unlocks by disengaging through the compression state of the torsion spring.
It achieves automatic locking and unlocking during linear displacement, improving positional accuracy and dynamic holding safety, simplifying the operation process, and avoiding the cumbersome operation and potential safety risks of traditional locking devices.
Smart Images
Figure CN223854574U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automatic unhooking mechanisms, and specifically relates to a linear displacement driven self-locking mechanism. Background Technology
[0002] Locking devices, as key functional components in mechanical systems, have permeated various fields of modern industry and daily life. In the industrial sector, they are used in tool fixing systems for heavy machine tools, safety latches for hydraulic lifting platforms, and flange connection devices for oil pipelines. In the construction sector, they are used in positioning locks for high-rise curtain walls, fixing mechanisms for bridge expansion joints, and outrigger locking devices for construction machinery. They are also widely used in emergency locking mechanisms for car seat belts, leveling locking devices for elevator cars, and automatic locking systems for smart door locks. However, traditional locking devices generally suffer from two constraints: regarding positional accuracy requirements, for example, in a machine tool tool changer mechanism, the tool must be positioned with an accuracy of ±0.05mm before the hydraulic pin can complete the locking action; and regarding dynamic holding requirements, for example, during the raising and lowering of a ship's gangway, the operator must ensure the suspension mechanism is completely stationary before implementing mechanical locking, otherwise slippage accidents may occur. Therefore, breaking through the limitations of traditional mechanical structures and inventing a new generation of locking devices has significant scientific and engineering application value. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a linear displacement driven self-locking mechanism to overcome the cumbersome and inconvenient nature of the traditional method of first driving a linearly moving object to a fixed position and then manually locking it, so as to realize the self-locking of the entire mechanism by driving the linear displacement.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] A linear displacement driven self-locking mechanism includes a support plate, a locking seat on the support plate, the locking seat being hinged to a locking pawl, and the locking pawl engaging with an elastic element; the support plate is slidably engaged with a sliding plate, the sliding plate having holes or grooves adapted to the locking pawl.
[0006] Preferably, the locking seat and the locking claw are connected by a locking claw pin; the support plate is provided with a locking seat mounting hole for installing the locking seat, and the locking seat mounting hole provides space for the locking claw to move.
[0007] The position of the locking pin is higher than the upper surface of the support plate.
[0008] Preferably, the elastic element is a torsion spring, and the locking claw is connected to the support plate by a torsion spring; or the locking claw is connected to the locking seat by a torsion spring.
[0009] Preferably, the locking claw is a hook plate, and the sliding plate is provided with a square hole that matches the locking claw.
[0010] Preferably, the support plate has a bracket lock on its side, the bracket lock has a protrusion, and the sliding plate has a protrusion on its side, the protrusion and the protrusion being compatible.
[0011] Preferably, the bracket lock is an elastic component, and the bracket lock deforms when the protrusion contacts and is squeezed.
[0012] Preferably, when the locking claw is in the disengaged state, the top of the locking claw is tilted away from the sliding plate, and the tail of the locking claw is tilted inside the mounting hole of the locking seat.
[0013] The present invention can achieve the following beneficial effects:
[0014] In use, this invention simply requires pushing the sliding plate onto the support plate. When the bottom end of the sliding plate contacts and presses against the locking pawl, the locking pawl rotates, and the torsion spring is compressed. As the sliding plate continues to move, the locking pawl continues to rotate until the sliding plate is blocked by the locking seat and cannot move further, at which point the locking pawl is in a hooked state on the sliding plate. Simultaneously, due to the different inclinations on both sides of the protrusion on the bracket lock, during sliding, the hemispherical protrusion on the sliding plate presses outward against the protrusion on the bracket lock. After the locking pawl is locked, the protrusion on the bracket lock blocks the sliding plate to prevent it from rebounding. This achieves linear displacement-driven self-locking. To release the lock, simply move the bracket lock outward by a certain angle. The protrusion on the bracket lock releases the sliding plate. Since the torsion spring is compressed in the locked state, the torsion spring pushes the locking pawl back to the unhooked state, and the locking pawl pushes the sliding plate back a short distance. This completes the release of the lock. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0016] Figure 1 This is the front view of the self-locking mechanism of this utility model;
[0017] Figure 2 This is a top view of the self-locking mechanism of this utility model;
[0018] Figure 3 This is the front view of the self-locking mechanism of this utility model;
[0019] Figure 4 This is a top view of the self-locking mechanism of this utility model.
[0020] In the diagram: 1. Support plate; 2. Locking seat; 3. Claw pin; 4. Locking claw; 6. Bracket lock; 7. Sliding plate. Detailed Implementation
[0021] Preferred solutions include Figures 1 to 4As shown, a linear displacement driven self-locking mechanism includes: a support plate 1 with two square holes, locking seats 2 installed at both ends of the square holes, locking pins 3 fixed to locking claws 4 on the locking seats, the locking claws being rotatable around the locking pins, and a torsion spring installed between the locking claws and the support plate; holes of a certain depth are drilled on both sides of the support plate, and bracket locks 6 are provided on the holes; a sliding plate 7 is installed on the support plate and can slide along the support plate, the sliding plate having two square holes at corresponding positions to the support plate, and hemispherical protrusions on both sides.
[0022] The torsion spring ensures the locking pawl is initially in a disengaged state, with its tail positioned inside the square hole in the support plate. The bracket lock is a composite component; the mating points with the two holes in the support plate are made of plastic material. A protrusion is located on the upper part of the bracket lock. After movement, the protrusion on the bracket lock and the protrusion on the sliding plate come into contact with each other.
[0023] When the sliding plate slides on the support plate, and its bottom end contacts and presses against the locking pawl, the locking pawl rotates, and the torsion spring is compressed. As the sliding plate continues to move, the locking pawl continues to rotate until the sliding plate is blocked by the locking seat and cannot move further; at this point, the locking pawl is hooking the sliding plate. Simultaneously, due to the different slopes on both sides of the protrusion on the bracket lock, during sliding, the hemispherical protrusion on the sliding plate presses outward against the protrusion on the bracket lock. After the locking pawl is locked, the protrusion on the bracket lock blocks the sliding plate, preventing it from rebounding. This achieves linear displacement-driven self-locking. To release the lock, simply move the bracket lock outward by a certain angle. The protrusion on the bracket lock releases the sliding plate. Since the torsion spring is compressed in the locked state, it pushes the locking pawl back to the unhooked state, causing the locking pawl to push the sliding plate back a short distance. This completes the release of the lock.
[0024] The applicable scenarios for this invention are:
[0025] As a key functional component in mechanical systems, locking devices have permeated various fields of modern industry and daily life: in the industrial sector, they are used in tool fixing systems of heavy machine tools, safety locks of hydraulic lifting platforms, and flange connection devices of oil pipelines; in the construction sector, they are used in positioning locks of high-rise curtain walls, fixing mechanisms of bridge expansion joints, and outrigger locking devices of engineering machinery; and they are also widely used in emergency locking mechanisms of car seat belts, leveling locking devices of elevator cars, and automatic locking systems of smart door locks. However, traditional locking devices generally have two constraints: in terms of positional accuracy requirements, for example, in the tool changer mechanism of a machine tool, the tool needs to be positioned with an accuracy of ±0.05mm before the hydraulic pin can complete the locking action; and in terms of dynamic holding requirements, for example, during the raising and lowering of ship gangways, the operator can only implement mechanical locking when the suspension mechanism is completely stationary, otherwise it may cause slippage accidents; in addition, they are widely used in the consumer sector, such as folding structures of furniture and buckle designs of child safety seats.
Claims
1. A linear displacement drive self-locking mechanism, characterized by: The utility model relates to a locking device for supporting plate, comprising a supporting plate (1), a locking seat (2) is arranged on the supporting plate (1), the locking seat (2) is hinged with a locking claw (4), and the locking claw (4) is matched with an elastic member; the supporting plate (1) is slidably connected with a sliding plate (7), and the sliding plate (7) is provided with a hole or a groove matched with the locking claw (4).
2. A linear displacement drive self-locking mechanism according to claim 1, characterized in that: The locking seat (2) is connected with the locking claw (4) through a fixed claw pin (3); the supporting plate (1) is provided with a locking seat mounting hole used for mounting the locking seat (2), and the locking seat mounting hole reserves a space for the locking claw (4) to move; The position of the fixed claw pin (3) is higher than the upper surface of the supporting plate (1).
3. A linear displacement drive self-locking mechanism according to claim 2, characterized in that: The elastic member is a torsion spring, and the locking claw (4) is connected with the supporting plate (1) through the torsion spring; or the locking claw (4) is connected with the locking seat (2) through the torsion spring.
4. A linear displacement drive self-locking mechanism according to claim 3, characterized in that: The locking claw (4) is a hook plate, and the sliding plate (7) is provided with a square hole matched with the locking claw (4).
5. A linear displacement drive self-locking mechanism according to claim 4, characterized in that: The supporting plate (1) is provided with a bracket lock (6) on the side surface, the bracket lock (6) is provided with a protrusion, the side surface of the sliding plate (7) is provided with a protrusion, and the protrusion is matched with the protrusion.
6. A linear displacement drive self-locking mechanism according to claim 5, characterized in that: The bracket lock (6) is an elastic member, and when the protrusion and the protrusion are in contact and extruded, the bracket lock (6) is deformed.
7. A linear displacement drive self-locking mechanism according to claim 6, characterized in that: When the locking claw (4) is in an unhooking state, the top of the locking claw (4) is inclined to the side away from the sliding plate (7), and the tail of the locking claw (4) is obliquely arranged in the locking seat mounting hole.