High-stability dual-drive unlocking and locking mechanism
The design of double guide grooves and double axial limit mechanisms solves the transmission offset and axial movement problems of traditional opening and closing lock mechanisms, achieving improved lock performance with high stability and long life.
Patent Information
- Application Number
- CN202511054975.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-09-26
AI Technical Summary
Traditional opening and closing locking mechanisms have problems with insufficient transmission stability, radial offset, axial movement and wear clearance during power transmission. In particular, it is difficult to meet the stability requirements when both electric and manual drive are taken into account, which affects the reliability and service life of the lock.
The dual guide grooves and dual axial limit mechanism are adopted to limit the freedom of movement of the transmission parts through the parallel first and second guide grooves. The precise matching design of the rectangular boss and the "convex" shaped through groove avoids stress concentration and jamming, achieving stable transmission.
It improves the structural compactness, operational reliability and service life of the lock, ensures the linear motion accuracy of the lock tongue and the smoothness of the transmission, and enhances the stability of the lock in high-precision applications.
Smart Images
Figure CN120701203A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mechanical locks, and in particular to a high-stability dual-drive opening and closing locking mechanism. Background Art
[0002] Traditional opening and closing locking mechanisms generally have the problem of insufficient transmission stability during long-term use. Existing locks are prone to radial deviation during power transmission, resulting in inaccurate movement trajectory of the lock tongue, affecting the reliability and service life of the lock. Especially in application scenarios that need to support both electric and manual drive, conventional transmission mechanisms are difficult to take into account the stability requirements of the two drive modes. In addition, the matching structure of the transmission parts and the fixed parts in the existing technology often has axial movement, which further reduces the working stability of the lock. More prominently, when the transmission parts are subjected to large torque, the traditional tongue and groove matching structure is prone to wear gaps, resulting in a decrease in power transmission efficiency and loss of motion accuracy. These technical defects are particularly evident in lock applications that require high-precision linear motion, which seriously restricts the performance improvement of lock products. In view of the above problems, the existing technology is in urgent need of improvement. Summary of the Invention
[0003] The present invention provides a high-stability dual-drive opening and closing lock mechanism, comprising: a first transmission member, a second transmission member and a fixed member; the first transmission member comprises a driving tenon, a core shaft and a power input structure; the second transmission member comprises a driven tenon groove and a first guide groove and a second guide groove engaged with the driving tenon; wherein, the fixed member is fixedly connected to the shell; a guide pin is provided on the fixed member, and the first transmission member is rotatably connected to the fixed member through the core shaft; the first guide groove and the second guide groove are two parallel linear through grooves; the core shaft passes through the first guide groove and is slidably connected to it; the guide pin passes through the second guide groove and is slidably connected to it; a lock tongue is fixedly connected to one end of the second transmission member; the driving tenon pushes the second transmission member to move linearly along the first guide groove and the second guide groove by transmitting torque to the driven tenon groove, thereby driving the lock tongue to extend and retract.
[0004] In which, the second transmission member and the fixed member are plate-shaped structures, and the second transmission member is arranged between the fixed member and the first transmission member; the first transmission member also includes a cylindrical base with a diameter greater than the core shaft and coaxial with the core shaft, the column height of the base is less than the core shaft, and the core shaft penetrates the upper and lower bottom surfaces; a core shaft hole is provided in the center of the fixed member, and the core shaft is placed in the core shaft hole for sliding and rotation connection; the slot width of the first guide groove is greater than the outer diameter of the core shaft and smaller than the outer diameter of the base, and the base and the fixed member cooperate to form an axial limit for the second transmission member.
[0005] Among them, the driven tenon is a "convex" shaped through groove; the driving tenon is a rectangular boss structure radially extending from one side of the base; the rectangular boss structure is inserted into the "convex" shaped through groove, and torque is transmitted through rotation. The groove design of the "convex" shaped through groove accurately matches the motion envelope of the rectangular boss structure.
[0006] A guide pin fixing hole is provided on one side of the fixing component; the groove section of the second guide groove is stepped, forming a narrow groove at the bottom and a wide groove on the surface; the guide pin is a column, and the bottom is three-stepped, the thinner end at the bottom is inserted into the guide pin fixing hole and fixedly connected to the fixing component, the middle section passes through the narrow groove and slides therewith, and the thicker section at the top passes through the wide groove and slides therewith, the stepped column of the guide pin matches the stepped groove of the second guide groove, and the guide pin cooperates with the fixing component to form an axial limit for the second transmission member.
[0007] Among them, the power input structure includes at least one of a sector gear and a spline hole; an arc-shaped tooth structure is provided on the outer side of the sector gear, and the sector gear is engaged with the electric drive gear of the electric drive mechanism to realize smooth electric drive; the spline hole is arranged at the center of the core shaft, connected to the knob or key core, to realize backup operation when power is off or to realize rapid opening and closing of the lock from the inside of the closed body.
[0008] Wherein, the lock tongue and the second transmission member are integrally formed; the first transmission member is also integrally formed.
[0009] When the power source drives the first transmission member to rotate, the driving tenon is embedded in the driven tenon groove to generate a tangential thrust; wherein, the driving tenon of the rectangular boss structure is inserted into the driven tenon groove of the "convex" shaped through groove, and torque is transmitted through rotation. When the first transmission member rotates to the two limit positions, the driving tenon of the rectangular boss structure is located on the wide side of the "convex" shaped through groove. When the first transmission member rotates to the middle position, the driving tenon of the rectangular boss structure is located on the narrow side of the "convex" shaped through groove. The side surface of the driving tenon of the rectangular boss structure forms a surface contact with the narrow side of the convex shaped through groove, so that the transmission of torque is mainly face-to-face contact, avoiding stress concentration caused by line contact or point contact, and greatly reducing the wear of parts. At the same time, the groove design of the "convex" shaped through groove accurately matches the motion envelope of the rectangular boss structure, so that the driving tenon will not get stuck in the driven tenon groove.
[0010] When the first transmission member rotates, the core shaft rotates within the first guide groove and slides along the outer wall of the core shaft, forming a first motion-constrained path. Simultaneously, the guide pin on the fixed component slides within the second guide groove along its outer wall, forming a second motion-constrained path. These two parallel guide grooves jointly restrict the second transmission member's freedom of movement, limiting the bolt's ability to linearly move in a predetermined direction.
[0011] Among them, the base is a cylinder that is coaxial with the core shaft and has a larger diameter, which cooperates with the fixed component to form the first axial limit for the second transmission component. The stepped column of the guide pin cooperates with the fixed component to form the second axial limit for the second transmission component; the double axial limit mechanism jointly suppresses the axial movement of the second transmission component.
[0012] The integrally formed first transmission member and second transmission member further enhance the stability and durability of the opening and closing locking mechanism.
[0013] Therefore, the high-stability dual-drive opening and closing locking mechanism provided by the present invention effectively solves the technical problems of transmission offset and axial movement of traditional locks through dual guide grooves and dual axial limit mechanisms, and has the advantages of compact structure, reliable operation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of a high-stability dual-drive opening and closing locking mechanism of the present invention.
[0015] Figure 2 The figure is a schematic diagram of the connection relationship between the first transmission member, the second transmission member and the fixed member in a high-stability dual-drive opening and closing locking mechanism of the present invention.
[0016] Figure 3 This is a structural schematic diagram of the second transmission member and guide pin in a high-stability dual-drive opening and closing locking mechanism of the present invention.
[0017] Figure 4 This is a schematic structural diagram of the first transmission member in a high-stability dual-drive opening and closing locking mechanism of the present invention.
[0018] Figure 5 This is a schematic structural diagram of the fixed components in a high-stability dual-drive opening and closing locking mechanism of the present invention. DETAILED DESCRIPTION
[0019] The technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0020] like Figure 1-5 As shown, a high-stability dual-drive opening and closing locking mechanism includes: a first transmission member 1, a second transmission member 2, a fixing member 3 and an electric drive mechanism 4. The first transmission member 1 is integrally formed by a metal die-casting process and includes a base 10, a driving tenon 11, a core shaft 12, a sector gear 13 and a spline hole 14; The core shaft 12 is a cylindrical structure arranged in the center of the first transmission member 1; The base 10 is a cylindrical body having a diameter greater than that of the core shaft 12 and coaxial with the core shaft 12. The base 10 is smaller in height than the core shaft 12 and is penetrated by the core shaft 12 on both the upper and lower bottom surfaces. The driving tenon 11 is a rectangular boss structure extending radially from one side of the base 10; The sector gear 13 is a sector-shaped structure provided on the other side of the base 10. The surface of the sector gear 13 is perpendicular to the core shaft 12. The center of the sector gear 13 is fixedly connected to the base 10 on the inside, and the arc is provided with an arc-shaped gear structure on the outside. The spline hole 14 is a through hole set in the core shaft 12, which can be matched with a knob or key core to realize backup operation in the event of power failure or to realize rapid opening and closing of the lock from the inside of the closed body. The second transmission member 2 is a plate-shaped structure integrally formed by metal die-casting process, including a driven tenon groove 24, a first guide groove 21 and a second guide groove 22; The driven tenon groove 24 is a convex through groove arranged on one side of the second transmission member 2; the rectangular boss structure of the driving tenon 11 is inserted into the convex through groove and torque is transmitted by rotation. The groove shape of the convex through groove is precisely matched with the motion envelope of the rectangular boss structure. The first guide groove 21 and the second guide groove 22 are parallel linear through grooves. The width of the first guide groove 21 is slightly larger than the outer diameter of the core shaft 12 and smaller than the outer diameter of the base 10. The bottom of the core shaft 12 passes through the first guide groove 21 and is slidably connected thereto. The bottom surface of the base 10 cooperates with the fixing member 3 to form an axial limit for the second transmission member 2. The groove cross section of the second guide groove 22 is stepped, forming a narrow groove with a smaller groove width at the bottom and a wide groove with a larger groove width at the surface; One end of the second transmission member 2 is connected to a lock tongue 23 , and the lock tongue 23 and the second transmission member 2 are integrally formed by a metal die-casting process.
[0021] The fixing member 3 is integrally formed by a metal die-casting process and is fixedly connected to the housing; a core shaft hole 32 is provided in the center of the fixing member 3; a guide pin fixing hole 33 is provided on one side of the fixing member 3; a guide pin 31 is fixedly provided on the guide pin fixing hole 33, and the core shaft 12 is rotatably connected in the core shaft hole 32; The guide pin 31 is a cylindrical body with a three-step bottom. The thinner end at the bottom is inserted into the guide pin fixing hole 33 and fixedly connected to the fixing component 3. The middle section passes through the narrow groove of the second guide groove 22 and slides therewith. The thicker section at the top passes through the wide groove of the second guide groove 22 and slides therewith. The stepped column of the guide pin 31 is precisely matched with the stepped groove of the second guide groove 22 and maintains a small gap for sliding. The stepped structure of the guide pin 31 cooperates with the fixing component 3 to form an axial limit for the second transmission member 2.
[0022] The electric drive mechanism 4 includes an electric drive gear 41 , and the electric drive gear 41 is engaged with the sector gear 13 to achieve smooth electric drive.
[0023] When the electric drive mechanism 4 receives the opening and closing lock signals, the electric drive gear 41 of the electric drive mechanism 4 engages the sector gear 13, driving the first transmission member 1 to rotate as a whole, and the rectangular boss of the driving tenon 11 is moved in the "convex"-shaped through groove of the driven tenon groove 24, converting the rotational torque into a horizontal thrust; the thrust pushes the second transmission member 2 to move linearly along the first guide groove 21 and the second guide groove 22, driving the lock tongue 23 to retract and extend.
[0024] When the lock needs to be opened or closed manually, the key core is inserted into the spline hole 14 or the knob inside the door is turned to directly rotate the core shaft 12. The driving tenon 11 also pushes the driven tenon groove 24 to achieve manual opening and closing of the lock.
[0025] Beneficial effects of the embodiment: 1. The stepped cross-section of the second guide groove 22 precisely matches the three-step column of the guide pin 31. The narrow groove constrains the middle section of the guide pin, while the wide groove cooperates with the thicker section, completely eliminating axial movement and greatly reducing up and down shaking during sliding, ensuring smooth movement.
[0026] The first guide groove 21 cooperates with the core shaft 12; the second guide groove 22 cooperates with the guide pin 31. The double guide grooves are designed in parallel to form a spatial double-point constraint, which greatly improves the linear trajectory accuracy of the lock tongue and avoids path deviation or skew.
[0027] The rectangular boss side of the driving tenon 11 forms a full contact surface with the narrow side groove wall of the "convex" shaped groove of the driven tenon groove 24, maximizing the load-bearing area, effectively dispersing stress, and solving the problems of local wear and slippage caused by stress concentration. The wide side of the "convex" shaped groove envelops the rotation trajectory to avoid motion interference and jamming, ensuring smooth transmission.
[0028] The diameter of the base 10 is larger than the core shaft 12, and its bottom surface and the fixing component 3 form the first axial limit; the stepped guide pin 31 and the second guide groove 22 constitute the secondary axial limit. The integrated dual axial limit mechanism significantly enhances the stability of the locking mechanism when bearing axial loads and the overall structural stability.
[0029] The first transmission member 1, the second transmission member 2 and the fixing member 3 are three integrally formed components, which eliminate the gaps and assembly errors of the split structure, greatly enhance the overall rigidity and structural stability and firmness, and provide a solid foundation for the realization of the above-mentioned precision matching and limiting functions.
Claims
1. A high stability dual drive opening and closing locking mechanism, characterized in that: include: A first transmission member (1), a second transmission member (2) and a fixing member (3); The first transmission member (1) comprises a driving tenon (11), a core shaft (12) and a power input structure; The second transmission member (2) comprises a driven tenon groove (24) engaged with the driving tenon (11), a first guide groove (21), and a second guide groove (22); The fixed component (3) is fixedly connected to the housing; a guide pin (31) is provided on the fixed component (3); the first transmission component (1) is rotationally connected to the fixed component (3) through the core shaft (12); the first guide groove (21) and the second guide groove (22) are two parallel through grooves; the core shaft (12) passes through the first guide groove (21) and is slidably connected thereto; the guide pin (31) passes through the second guide groove (22) and is slidably connected thereto; a lock tongue (23) is fixedly connected to one end of the second transmission component (2); the driving tenon (11) pushes the second transmission component (2) to move linearly along the first guide groove (21) and the second guide groove (22) by transmitting torque to the driven tenon groove (24), thereby driving the lock tongue (23) to extend and retract.
2. A high-stability dual-drive opening and closing locking mechanism according to claim 1, characterized in that: The second transmission member (2) and the fixed member (3) are plate-shaped structures, and the second transmission member (2) is arranged between the fixed member (3) and the first transmission member (1); the first transmission member (1) also includes a cylindrical base (10) with a diameter greater than the core shaft (12) and coaxial with the core shaft (12), the column height of the base (10) is less than the core shaft (12), and the core shaft (12) penetrates the upper and lower bottom surfaces; a core shaft hole (32) is provided in the center of the fixed member (3), and the core shaft (12) is placed in the core shaft hole (32) for sliding and rotating connection; The width of the first guide groove (21) is greater than the outer diameter of the core shaft (12) and smaller than the outer diameter of the base (10), and the base (10) cooperates with the fixing component (3) to form an axial limit for the second transmission component (2).
3. The high-stability dual-drive opening and closing locking mechanism according to claim 2, characterized in that: The driven tenon (24) is a convex through-groove; the driving tenon (11) is a rectangular boss structure radially extending from one side of the base (10); the rectangular boss structure is inserted into the convex through-groove and torque is transmitted by rotation, and the groove design of the convex through-groove precisely matches the motion envelope of the rectangular boss structure.
4. The high-stability dual-drive opening and closing locking mechanism according to claim 2, characterized in that: A guide pin fixing hole (33) is provided on one side of the fixing component (3); the groove section of the second guide groove (22) is stepped, forming a narrow groove at the bottom and a wide groove at the top; the guide pin (31) is a column, the bottom of which is stepped in three steps, the thinner end at the bottom is inserted into the guide pin fixing hole (33) and fixedly connected to the fixing component (3), the middle section passes through the narrow groove and is slidably connected thereto, and the thicker section at the top passes through the wide groove and is slidably connected thereto, the stepped column of the guide pin (31) matches the stepped groove of the second guide groove (22), and the guide pin (31) cooperates with the fixing component (3) to form an axial limit for the second transmission member (2).
5. A high-stability dual-drive opening and closing locking mechanism according to any one of claims 1 to 4, characterized in that: The power input structure includes at least one of a sector gear (13) and a spline hole (14); an arc-shaped tooth structure is provided on the outer side of the sector gear (13) for connecting to an electric drive source; and the spline hole (14) is provided at the center of the core shaft (12) for connecting to a manual drive input component.
6. A high-stability dual-drive opening and closing locking mechanism according to any one of claims 1 to 4, characterized in that: The locking tongue (23) and the second transmission member (2) are integrally formed.
7. The high-stability dual-drive opening and closing locking mechanism according to claim 5, characterized in that: The first transmission member (1) is integrally formed.