A highly stable dual-drive opening and closing lock mechanism

Abstract

The utility model provides a highly stable double-drive opening and locking mechanism, belonging to the technical field of mechanical locks; this mechanism includes a first transmission part, a second transmission part and a fixing part. The first transmission part is provided with a driving tenon, a core shaft and a power input structure; the second transmission part is provided with a driven tenon groove in the shape of a "convex" - shaped through groove and two parallel linear first guiding grooves and second guiding grooves; the driving tenon is a rectangular boss structure, which is embedded in the driven tenon groove to transmit torque, and the wear is greatly reduced through surface contact; the core shaft slides through the first guiding groove, and the stepped guiding pin on the fixing part slides through the second guiding groove, forming two parallel movement paths to ensure the precise linear expansion and contraction of the lock tongue on the second transmission part; the base body is coaxial with the core shaft and has a larger diameter, and cooperates with the fixing part to form the first axial limit; the stepped guiding pin matches with the second guiding groove to form the second axial limit, completely suppressing axial movement and significantly improving stability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical lock technology, and more specifically, to a highly stable dual-drive opening and closing lock mechanism. Background Technology

[0002] Traditional locking mechanisms commonly suffer from insufficient transmission stability during long-term use. Existing locks are prone to radial offset during power transmission, resulting in inaccurate bolt movement trajectories and affecting the lock's reliability and lifespan. This is particularly problematic in applications requiring simultaneous electric and manual operation, where conventional transmission mechanisms struggle to meet the stability requirements of both methods. Furthermore, the mating structure between transmission and fixed components in existing technologies often exhibits axial movement, further reducing the lock's operational stability. More significantly, when transmission components are subjected to high torque, traditional tenon-and-groove mating structures are prone to wear gaps, leading to decreased power transmission efficiency and loss of motion accuracy. These technical deficiencies are especially pronounced in lock applications requiring high-precision linear motion, severely hindering performance improvements. Therefore, improvements to existing technologies are urgently needed to address these issues. Summary of the Invention

[0003] This utility model provides a highly stable dual-drive opening and closing lock mechanism, comprising: a first transmission component, a second transmission component, and a fixed component; the first transmission component includes a driving tenon, a spindle, and a power input structure; the second transmission component includes a driven tenon groove that engages with the driving tenon, and a first guide groove and a second guide groove; wherein, the fixed component is fixedly connected to the housing; a guide pin is provided on the fixed component, and the first transmission component is rotatably connected to the fixed component through the spindle; the first guide groove and the second guide groove are two parallel straight through grooves; the spindle 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 locking tongue is fixedly connected to one end of the second transmission component; the driving tenon transmits torque to the driven tenon groove, pushing the second transmission component to move linearly along the first guide groove and the second guide groove, thereby causing the locking tongue to extend and retract.

[0004] The second transmission component and the fixed component are plate-shaped, with the second transmission component positioned between the fixed component and the first transmission component. The first transmission component further includes a cylindrical base with a diameter larger than the mandrel and coaxial with the mandrel. The height of the cylindrical base is smaller than that of the mandrel, and the mandrel penetrates both the upper and lower bottom surfaces. The fixed component has a mandrel hole in its center, and the mandrel is placed in the mandrel hole for sliding and rotational connection. The width of the first guide groove is larger than the outer diameter of the mandrel but smaller than the outer diameter of the base. The base and the fixed component cooperate to axially limit the second transmission component.

[0005] Among them, the driven mortise groove is a "convex"-shaped through groove; the driving tenon is a rectangular boss structure radially protruding from one side of the base body; the rectangular boss structure is inserted into the "convex"-shaped through groove, and torque is transmitted through rotation. The groove type design of the "convex"-shaped through groove precisely matches the motion envelope of the rectangular boss structure.

[0006] One side of the fixed component is provided with a guide pin fixing hole; the groove type cross-section of the second guide groove is in a stepped shape, forming a narrow groove at the bottom and a wide groove on the face; the guide pin is a cylinder, and the bottom is in a three-stage stepped shape. The thinner lower end is inserted into the guide pin fixing hole and fixedly connected to the fixed component. The middle section passes through the narrow groove and is in sliding connection therewith, and the thicker upper section passes through the wide groove and is in sliding connection therewith. The stepped cylinder of the guide pin matches the stepped groove type of the second guide groove, and the guide pin and the fixed component cooperate to axially limit 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 outside of the sector gear, and the sector gear meshes with the electric drive gear of the electric drive mechanism to achieve smooth electric drive; the spline hole is arranged at the center of the mandrel and connects a knob or a key core to achieve standby operation when powered off or to quickly unlock and lock from the inside of the closed body.

[0008] Among them, the locking tongue and the second transmission member are integrally formed; the first transmission member is integrally formed.

[0009] When the power source drives the first transmission member to rotate, the driving tenon is embedded in the driven mortise groove to generate a tangential thrust; among them, the driving tenon of the rectangular boss structure is inserted into the driven mortise 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 at the wide opening 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 at the narrow opening 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 opening side of the "convex"-shaped through groove, so that the conduction of the torque is mainly based on face-to-face contact, avoiding stress concentration caused by line contact or point contact, and greatly reducing the wear of the parts. At the same time, the groove type design of the "convex"-shaped through groove precisely matches the motion envelope of the rectangular boss structure, so that the driving tenon will not get stuck in the driven mortise groove.

[0010] When the first transmission member rotates, the mandrel rotates in the first guide groove and at the same time makes the first guide groove slide along the outer wall of the mandrel, forming a first motion constraint path. At the same time, the guide pin on the fixed component is in the second guide groove, making the second guide groove slide along the outer wall of the guide pin, forming a second motion constraint path. The two parallel guide grooves jointly limit the motion freedom of the second transmission member, so that the locking tongue can only move linearly along the preset direction.

[0011] The base is a cylinder coaxial with the mandrel but with a larger diameter. It works with the fixing component to form the first axial limit for the second transmission component. The stepped column of the guide pin works with the fixing component to form the second axial limit for the second transmission component. The dual axial limit mechanism together suppresses the axial movement of the second transmission component.

[0012] The one-piece molded first and second transmission components further enhance the stability and durability of the locking and unlocking mechanism.

[0013] Therefore, the high-stability dual-drive opening and closing lock mechanism provided by this utility model effectively solves the technical problems of transmission offset and axial movement of traditional locks through dual guide grooves and dual axial limiting mechanisms, and has the advantages of compact structure, reliable operation and long service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a high-stability dual-drive opening and closing locking mechanism according to this utility model.

[0015] Figure 2 This is a schematic diagram showing the connection relationship between the first transmission component, the second transmission component, and the fixed component in a high-stability dual-drive opening and closing lock mechanism of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the second transmission component and guide pin in a high-stability dual-drive opening and closing lock mechanism of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the first transmission component in a high-stability dual-drive opening and closing lock mechanism of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the fixed component in a high-stability dual-drive opening and closing lock mechanism of this utility model. Detailed Implementation

[0019] The technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings. In the description of this application, the terms "first", "second", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] like Figure 1-5 As shown, a highly stable dual-drive opening and closing locking mechanism includes: a first transmission component 1, a second transmission component 2, a fixed component 3, and an electric drive mechanism 4. The first transmission component 1 is integrally formed by metal die casting and includes a base 10, a drive tenon 11, a spindle 12, a sector gear 13, and a spline hole 14. The spindle 12 is a cylindrical structure located in the center of the first transmission component 1; The substrate 10 is a cylinder with a diameter larger than that of the mandrel 12 and coaxial with the mandrel 12. The height of the cylinder of the substrate 10 is less than that of the mandrel 12, and the mandrel 12 penetrates through the upper and lower bottom surfaces thereof. The driving tenon 11 is a rectangular boss structure radially protruding from one side of the substrate 10. The sector gear 13 is arranged on the other side of the substrate 10 in a sector shape. The surface where the sector gear 13 is located is perpendicular to the mandrel 12. Its center is fixedly connected to the substrate 10 on the inner side, and an arc-shaped gear structure is arranged on its arc on the outer side. The spline hole 14 is a through hole arranged in the mandrel 12 and can be connected to a knob or a key core in a matching manner to achieve a backup operation when power is off or to quickly unlock / lock from the inside of the closed body. The second transmission member 2 is a plate-like structure integrally formed by a die-casting process of metal, and includes a driven tenon groove (从动榫槽) 24, a first guide groove 21 and a second guide groove 22. The driven tenon groove 24 is a "convex"-shaped 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"-shaped through groove, and torque is transmitted through rotation. The groove type design of the "convex"-shaped through groove precisely matches 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 notch of the first guide groove 21 is slightly larger than the outer diameter of the mandrel 12 and smaller than the outer diameter of the substrate 10. The bottom of the mandrel 12 passes through the first guide groove 21 and is slidably connected thereto. The bottom surface of the substrate 10 cooperates with the fixing member 3 to axially limit the second transmission member 2. The groove type cross-section of the second guide groove 22 is in a stepped shape, forming a narrow groove with a smaller bottom notch width and a wide groove with a larger notch width on the face. One end of the second transmission member 2 is connected with a locking tongue 23, and the locking tongue 23 and the second transmission member 2 are integrally formed by a die-casting process of metal.

[0021] The fixing member 3 is integrally formed by a die-casting process of metal and is fixedly connected to the housing. A mandrel 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 arranged on the guide pin fixing hole 33, and the mandrel 12 is rotatably connected in the mandrel hole 32. The guide pin 31 is a cylinder with a three-level stepped bottom. The thinner lower end is inserted into the guide pin fixing hole 33 and fixedly connected to the fixing member 3. The middle section passes through the narrow groove of the second guide groove 22 and is slidably connected thereto. The thicker upper section passes through the wide groove of the second guide groove 22 and is slidably connected thereto. The stepped cylinder of the guide pin 31 precisely matches the stepped groove type of the second guide groove 22 and maintains a small gap for sliding. The stepped structure of the guide pin 31 and the fixing member 3 cooperate to axially limit the second transmission member 2.

[0022] The electric drive mechanism 4 includes an electric drive gear 41, and the electric drive gear 41 meshes with the sector gear 13 to achieve smooth electric drive.

[0023] When the electric drive mechanism 4 receives the lock-opening and lock-closing signals, the electric drive gear 41 of the electric drive mechanism 4 meshes with 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拨动 within 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 guiding groove 21 and the second guiding groove 22, driving the lock tongue 23 to retract and extend.

[0024] When it is necessary to use the manual path to open and close the lock, insert the key core into the spline hole 14 or turn the core shaft 12 directly through the knob inside the door, and the driving tenon 11 also pushes the driven tenon groove 24 to achieve manual unlocking and locking.

[0025] Beneficial effects of the embodiment: 1. The stepped cross-section of the second guiding groove 22 is precisely matched with the three-stage stepped cylinder of the guiding pin 31. The narrow groove restricts the middle section of the guiding pin, and the wide groove cooperates with the thicker section, completely eliminating axial play, and at the same time greatly reducing the up-and-down晃动 during sliding, ensuring the smoothness of the movement.

[0026] The first guiding groove 21 cooperates with the core shaft 12; the second guiding groove 22 cooperates with the guiding pin 31. The double guiding grooves are designed in parallel, forming a spatial two-point constraint, greatly improving the linear trajectory accuracy of the lock tongue, and avoiding path deviation or skew.

[0027] 3 The side surface of the rectangular boss of the driving tenon 11 forms a full contact surface with the narrow-side groove wall of the "convex"-shaped through groove of the driven tenon groove 24, maximizing the bearing area, effectively dispersing stress, solving the problems of local wear and slipping caused by stress concentration. The wide-side of the "convex"-shaped through groove envelopes the rotational trajectory, avoiding movement interference and jamming, and ensuring smooth transmission.

[0028] The diameter of the base body 10 is larger than that of the core shaft 12, and its bottom surface forms the first axial limit with the fixed component 3; the stepped guiding pin 31 and the second guiding groove 22 form the second 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 fixed component 3 are respectively three major components formed by integral molding, eliminating the gaps and assembly errors of the split structure, greatly strengthening the overall rigidity and structural stability and firmness, and providing a solid foundation for the realization of the above-mentioned precise fitting and limiting functions.

Claims

1. A high-stability double drive opening and closing lock mechanism, characterized in that, Comprising: A first transmission member (1), a second transmission member (2) and a fixed member (3); The first transmission member (1) includes a driving tenon (11), a core shaft (12) and a power input structure; The second transmission member (2) includes a driven tenon groove (24) engaged with the driving tenon (11), a first guiding groove (21) and a second guiding groove (22); The fixed member (3) is fixedly connected to the housing; a guiding pin (31) is provided on the fixed member (3), and the first transmission member (1) is rotationally connected to the fixed member (3) through the core shaft (12); the first guiding groove (21) and the second guiding groove (22) are two parallel through grooves; the core shaft (12) passes through the first guiding groove (21) and is slidably connected thereto; the guiding pin (31) passes through the second guiding groove (22) and is slidably connected thereto; one end of the second transmission member (2) is fixedly connected with a locking tongue (23); the driving tenon (11) transmits torque to the driven tenon groove (24), pushing the second transmission member (2) to linearly move along the first guiding groove (21) and the second guiding groove (22), thereby driving the locking tongue (23) to expand and contract.

2. A high-stability double drive opening and closing lock mechanism according to claim 1, characterized in that: The second transmission member (2) and the fixed member (3) are in a plate-like structure, and the second transmission member (2) is arranged between the fixed member (3) and the first transmission member (1); the first transmission member (1) further includes a cylindrical base body (10) with a diameter larger than that of the core shaft (12) and coaxial with the core shaft (12), the column height of the base body (10) is less than that of the core shaft (12), and the core shaft (12) penetrates through the upper and lower bottom surfaces thereof; 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 rotational connection; Wherein, the notch width of the first guiding groove (21) is larger than the outer diameter of the core shaft (12) and smaller than the outer diameter of the base body (10), and the base body (10) and the fixed member (3) cooperate to form axial limitation for the second transmission member (2).

3. The high-stability dual-drive opening and closing lock mechanism according to claim 2, characterized in that: The driven tenon groove (24) is a "convex”-shaped through groove; the driving tenon (11) is a rectangular boss structure radially protruding from one side of the base body (10); the rectangular boss structure is inserted into the "convex”-shaped through groove, and torque is transmitted through rotation, and the groove type design of the "convex”-shaped through groove accurately matches the movement envelope of the rectangular boss structure.

4. A high-stability double drive opening and closing lock mechanism according to claim 2, characterized in that: A guiding pin fixing hole (33) is provided on one side of the fixed member (3); the groove type cross-section of the second guiding groove (22) is in a stepped shape, forming a narrow groove at the bottom and a wide groove at the face; the guiding pin (31) is a column, the bottom is in a three-level stepped shape, the thinner lower end is inserted into the guiding pin fixing hole (33) and fixedly connected to the fixed member (3), the middle section passes through the narrow groove and is slidably connected thereto, the thicker upper section passes through the wide groove and is slidably connected thereto, the stepped column of the guiding pin (31) matches the stepped groove type of the second guiding groove (22), and the guiding pin (31) and the fixed member (3) cooperate to form axial limitation for the second transmission member (2).

5. A high-stability double drive opening and closing lock mechanism according to any one of claims 1-4, characterized in that: The power input structure includes at least one of a sector gear (13) and a spline hole (14); the sector gear (13) has an arc-shaped tooth structure on its outer side, and the arc-shaped tooth structure is connected to the electric drive mechanism (4); the spline hole (14) is located at the center of the spindle (12) and is connected to the manual drive input component.

6. A high-stability double drive opening and closing lock mechanism according to any one of claims 1-4, characterized in that: The locking tongue (23) and the second transmission component (2) are integrally formed.

7. The high-stability dual-drive opening and closing lock mechanism according to claim 5, characterized in that: The first transmission component (1) is integrally formed.

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