A drive locking mechanism suitable for small center distance

Abstract

The utility model provides a kind of transmission locking mechanism suitable for small centre distance, comprising: runner, connecting rod and two fixed plates;The center of runner is equipped with shaft hole, and the outer periphery edge of runner is equipped with gear portion, and arc protrusion is equipped between shaft hole and gear portion;Transmission hole is opened in connecting rod and is engaged with the gear portion of runner;Two fixed plates are symmetrically arranged and are mutually fixed, and connecting rod is arranged between two fixed plates, and runner is rotatably connected between two fixed plates, and is engaged transmission connection with connecting rod;At least one fixed plate is equipped with arc slot, and arc protrusion is arranged in arc slot.The utility model is equipped with arc protrusion between gear portion and shaft hole on runner, and arc slot for accommodating arc protrusion is arranged on fixed plate, and limit direction is provided for runner rotation, fundamentally avoids the strength defect that traditional cantilever type transmission shaft is easy to bend and fracture under the scene of small centre distance, and significantly improves the structural strength and anti-failure ability of mechanism in small centre distance application.

Description

Technical Field

[0001] This utility model relates to the field of door and window hardware technology, and more specifically to a transmission and locking mechanism suitable for small center distances. Background Technology

[0002] The transmission locking mechanism is the core component for doors and windows to achieve stable opening and closing and reliable locking. It ensures the convenience and safety of doors and windows and is widely used in various types of casement windows, sliding windows and other door and window products.

[0003] In the current door and window hardware industry, a typical transmission locking mechanism is a transmission locking structure that uses a stainless steel rotating wheel, a lever, and a connecting rod. Its transmission principle is similar to a cam mechanism; the rotation of the stainless steel rotating wheel directly drives the lever to reciprocate, and the lever then drives the connecting rod to transmit the locking action. This solution has a certain degree of adaptability in practical applications and can be applied to various center-to-center distance scenarios according to different door and window design requirements.

[0004] However, the design of this stainless steel rotary wheel in conjunction with the lever and connecting rod has significant technical flaws and cannot meet more comprehensive usage requirements. For example, the transmission locking mechanism of this design cannot be adapted to scenarios with small center distances. In scenarios where door and window designs require small center distances, such as 10mm, the installation space is extremely limited. To achieve effective cooperation between the stainless steel rotary wheel and the lever, the transmission shaft connecting the two must extend into the connecting rod, forming a cantilever structure. During the long-term opening and closing of the door and window, this cantilever structure will continuously bear radial and axial forces. Its structural characteristics determine that its resistance to deformation and fracture is weak. Long-term use can easily lead to failures such as bending and breakage of the transmission shaft, directly causing the transmission locking mechanism to fail. This not only affects the normal use of the door and window but may also cause safety hazards in severe cases.

[0005] Therefore, the existing transmission locking mechanism is not strong enough under small center distances, making it difficult to meet the needs of actual production and application. Utility Model Content

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a transmission locking mechanism suitable for small center distances, so as to solve the technical problem that the existing transmission locking mechanisms are not strong enough under small center distances.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a transmission locking mechanism suitable for small center distances, which includes: A rotating wheel, wherein the center of the rotating wheel is provided with a shaft hole, the outer peripheral edge of the rotating wheel is provided with a gear part, and an arc-shaped protrusion is provided between the shaft hole and the gear part; A connecting rod, wherein a transmission hole is provided on the connecting rod to mesh with the gear part of the rotating wheel; Two fixed plates are symmetrically arranged and fixed to each other. A connecting rod is located between the two fixed plates. A rotating wheel is rotatably connected between the two fixed plates and meshes with the connecting rod for transmission. At least one of the fixed plates is provided with an arc-shaped groove, and an arc-shaped protrusion passes through the arc-shaped groove.

[0008] In one embodiment, the fixing plate is provided with a first through hole, and both ends of the rotating wheel are provided with rotating shafts. The rotating shafts extend outward along the axial direction of the rotating wheel, and the two rotating shafts are respectively inserted through the two first through holes.

[0009] In one embodiment, the transmission locking mechanism suitable for small center distance further includes: a limiting shell; the limiting shell is disposed between the connecting rod and the two fixed plates, the limiting shell has a through groove on the side facing the connecting rod, and the two side walls adjacent to the side wall where the through groove is located are respectively provided with a mounting groove and a second through hole, the through groove and the second through hole are respectively connected to the mounting groove; the rotating wheel is embedded in the mounting groove, the arc-shaped protrusion extends through the mounting groove to the arc-shaped groove, the rotating shaft on the side away from the arc-shaped protrusion passes through the second through hole, and the gear part extends from the mounting groove through the through groove to the connecting rod.

[0010] In one embodiment, the limiting shell is made of plastic.

[0011] In one embodiment, the transmission locking mechanism suitable for small center distance further includes: two mounting seats and a panel; the two ends of the connecting rod are respectively fixedly connected to the two mounting seats; a limiting groove is provided on one side of the panel, the mounting seat passes through the limiting groove, and the fixing plate is located between the inner sidewalls of the limiting groove.

[0012] In one embodiment, the fixing plate has a first limiting protrusion on the sidewalls that are far apart from each other, and the two inner sidewalls of the limiting groove have a second limiting protrusion protruding towards the fixing plate. The first limiting protrusion and the second limiting protrusion are offset from each other.

[0013] In one embodiment, the connecting rod is provided with two first receiving holes, and the two mounting seats are respectively provided with second receiving holes corresponding to the first receiving holes. The first receiving holes and the second receiving holes communicate to form an oil storage hole.

[0014] In one embodiment, the transmission locking mechanism suitable for small center distance further includes: a plurality of rivet shafts; the fixing plate is provided with a plurality of first mounting holes, and the plurality of rivet shafts pass through the first mounting holes and are riveted to the fixing plate.

[0015] In one embodiment, the fixing plate is made of stainless steel.

[0016] In one embodiment, the impeller is made of zinc alloy.

[0017] The advantages of this invention compared to the prior art are as follows: By setting a gear on the outer periphery of the rotating wheel, which directly meshes with the transmission hole on the connecting rod, the rotating wheel rotates and drives the connecting rod to move through the meshing action to transmit the locking action; by using two symmetrically fixed plates to clamp and support the rotating wheel and the connecting rod, the coaxiality and stability of the movement of each component are ensured; by setting an arc-shaped protrusion on the rotating wheel between the gear and the shaft hole, and setting an arc-shaped groove on the fixed plate to accommodate the arc-shaped protrusion, the rotating wheel rotation is provided with limiting guidance, which fundamentally avoids the strength defects of traditional cantilever transmission shafts that are prone to bending and breakage in small center distance scenarios, and significantly improves the structural strength and failure resistance of the mechanism in small center distance applications.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 2 An exploded view of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 3 A schematic diagram of the installation steps of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 4 A schematic diagram of the second installation step of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 5 A schematic diagram of the third step in the installation of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 6 A schematic diagram of the fourth step in the installation of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 7 A schematic diagram of step five of the installation process for a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 8 A schematic diagram of the installation step six of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 9A schematic diagram of the installation steps seven of a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 10 A schematic diagram of the installation steps eight for a transmission locking mechanism suitable for small center distances provided by this utility model; Figure 11 This is a structural diagram illustrating step nine of the installation process for a transmission locking mechanism suitable for small center distances, provided by this utility model.

[0020] Figure label: 1. Rotary wheel; 11. Shaft hole; 12. Gear part; 121. Raised tooth; 13. Arc-shaped protrusion; 14. Rotary shaft; 2. Connecting rod; 21. Transmission hole; 22. Positioning groove; 23. First receiving hole; 24. Snap groove; 25. Second mounting hole; 3. Fixing plate; 31. Arc-shaped groove; 32. First through hole; 33. First limiting protrusion; 34. First mounting hole; 4. Limiting shell; 41. Through groove; 42. Mounting groove; 43. Second through hole; 44. Limiting part; 45. Through hole; 46. Slot; 5. Anti-pull slant block; 51. Insertion part; 52. Bending part; 6. Mounting base; 61. Second receiving hole; 62. Snap-fit ​​protrusion; 7. Panel; 71. Limiting groove; 8. Rivet; 9. Rivet shaft. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] See Figures 1-11 As shown, this embodiment discloses a transmission locking mechanism suitable for small center distances, which includes: a rotating wheel 1, a connecting rod 2, and two fixed plates 3; the rotating wheel 1 has a shaft hole 11 at its center, a gear part 12 on its outer peripheral edge, and an arc-shaped protrusion 13 between the shaft hole 11 and the gear part 12; the connecting rod 2 has a transmission hole 21 that meshes with the gear part 12 of the rotating wheel 1; the two fixed plates 3 are symmetrically arranged and fixed to each other, the connecting rod 2 is located between the two fixed plates 3, the rotating wheel 1 is rotatably connected between the two fixed plates 3, and is meshed with the connecting rod 2 for transmission connection, at least one fixed plate 3 has an arc-shaped groove 31, and the arc-shaped protrusion 13 passes through the arc-shaped groove 31.

[0026] This embodiment of the transmission locking mechanism suitable for small center distances uses a gear part 12 set on the outer peripheral edge of the rotating wheel 1, which directly meshes with the transmission hole 21 on the connecting rod 2. When the rotating wheel 1 rotates, it drives the connecting rod 2 to move through the meshing action to transmit the locking action. This replaces the complex transmission structure of the traditional stainless steel rotating wheel 1 and the lever block, reducing the number of parts and the assembly complexity. Two symmetrically fixed fixing plates 3 form a clamping support for the rotating wheel 1 and the connecting rod 2, ensuring the coaxiality and stability of the movement of each component. By setting an arc-shaped protrusion 13 on the rotating wheel 1 between the gear part 12 and the shaft hole 11, and setting an arc-shaped groove 31 on the fixing plate 3 to accommodate the arc-shaped protrusion 13, the rotation of the rotating wheel 1 is limited and guided, and the radial force of the rotating wheel 1 is distributed to the fixing plate 3, avoiding the cantilever force on the rotating shaft 14. This fundamentally avoids the strength defects of traditional cantilever transmission shafts that are prone to bending and breakage in small center distance scenarios, and significantly improves the structural strength and failure resistance of the mechanism in small center distance applications.

[0027] See Figures 2-3 As shown, the gear section 12 has a plurality of protruding teeth 121 distributed circumferentially along the rotating wheel 1. The number of transmission holes 21 is the same as the number of protruding teeth 121, and the plurality of transmission holes 21 are linearly distributed along the length direction of the connecting rod 2. In specific implementation, the external transmission rod is inserted into the shaft hole 11, driving the rotating wheel 1 to rotate. The protruding teeth 121 of the rotating wheel 1 push the inner wall of the transmission hole 21, causing the connecting rod 2 to move along its length direction. The gear section 12 directly meshes with the transmission hole 21, resulting in low power loss when transmitting the locking action. Compared with the traditional paddle drive, the transmission efficiency is improved, and there is no problem of increased transmission clearance caused by paddle wear.

[0028] See Figures 2-3As shown, the fixed plate 3 has a first through hole 32, and both ends of the rotating wheel 1 have rotating shafts 14. The rotating shafts 14 extend outward along the axial direction of the rotating wheel 1, and the two rotating shafts 14 pass through the two first through holes 32 respectively. Preferably, the first through hole 32 is a round hole; the diameter of the first through hole 32 is adapted to the outer diameter of the rotating shaft 14 of the rotating wheel 1; the rotating shaft 14 of the rotating wheel 1 is integrally die-cast with the rotating wheel 1 and extends to both ends along the axial direction of the rotating wheel 1. The rotating shaft 14 cooperates with the first through hole 32 to provide stable rotational support for the rotating wheel 1, ensuring that the axis of the rotating wheel 1 does not deviate when rotating, and ensuring that the gear part 12 and the transmission hole 21 are always precisely meshed; the rotating shaft 14 extends along the axial direction of the rotating wheel 1, further avoiding the problem of insufficient strength caused by the excessive cantilever of the traditional transmission shaft under small center distance, and also eliminating the need for additional bearing installation. The rotation of the rotating wheel 1 is achieved through the direct cooperation between the rotating shaft 14 and the first through hole 32, reducing the number of parts, lowering costs, simplifying the installation process, and improving assembly efficiency.

[0029] See Figures 2-3 As shown, the outer diameter of the rotating shaft 14 is smaller than the outer diameter of the rotating wheel 1, and the inner diameter of the first through hole 32 is smaller than the outer diameter of the rotating wheel 1. It can be understood that the outer diameter of the rotating shaft 14 is smaller than the outer diameter of the rotating wheel 1, forming a stepped structure; the inner diameter of the first through hole 32 matches the outer diameter of the rotating shaft 14 and is smaller than the outer diameter of the rotating wheel 1. During installation, when the rotating shaft 14 passes through the first through hole 32, the end face of the rotating wheel 1 will fit against the inner wall of the fixing plate 3. Since the inner diameter of the first through hole 32 is smaller than the outer diameter of the rotating wheel 1, the rotating wheel 1 cannot pass through the first through hole 32, forming an axial limit. During assembly, there is no need to add additional retaining rings, snap rings, or other limiting parts 44; the axial positioning of the rotating wheel 1 can be achieved solely through the difference in outer diameter between the rotating shaft 14 and the rotating wheel 1, and the difference in outer diameter between the first through hole 32 and the rotating wheel 1.

[0030] See Figures 2-3As shown, the transmission locking mechanism suitable for small center distances also includes: a limiting shell 4; the limiting shell 4 is disposed between the connecting rod 2 and the two fixed plates 3, the limiting shell 4 is provided with a through groove 41 on the side facing the connecting rod 2, and the two side walls adjacent to the side wall where the through groove 41 is located are respectively provided with a mounting groove 42 and a second through hole 43, the through groove 41 and the second through hole 43 are respectively connected to the mounting groove 42; the rotating wheel 1 is embedded in the mounting groove 42, the arc-shaped protrusion 13 extends through the mounting groove 42 to the arc-shaped groove 31, the rotating shaft 14 on the side away from the arc-shaped protrusion 13 passes through the second through hole 43, and the gear part 12 extends from the mounting groove 42 through the through groove 41 to the connecting rod 2. During installation, first embed the rotating wheel 1 into the mounting groove 42, and then adjust the position of the rotating wheel 1 to ensure that the arc-shaped protrusion 13 of the rotating wheel 1 extends through the through groove 41 to the arc-shaped groove 31 of the fixing plate 3, and that the rotating shaft 14 on the side away from the arc-shaped protrusion 13 passes through the second through hole 43 of the limiting shell 4; then align the first through holes 32 of the two fixing plates 3 with the rotating shaft 14 and insert them, so that the two fixing plates 3 are tightly attached to both sides of the limiting shell 4, and the two fixing plates 3 are fixedly connected; then adjust the position of the connecting rod 2 so that the gear part 12 of the rotating wheel 1 passes through the through groove 41 of the limiting shell 4 and aligns and meshes with the transmission hole 21 of the connecting rod 2. The limiting shell 4 protects the rotating wheel 1, preventing dust and impurities from entering the mating part between the rotating wheel 1 and the fixed plate 3, thus avoiding impurities affecting the smooth rotation of the rotating wheel 1 and improving the service life of the mechanism. The through groove 41 provides clearance space for the meshing of the gear part 12 and the transmission hole 21, while limiting the lateral displacement of the connecting rod 2 to ensure accurate meshing. The mounting groove 42 and the second through hole 43 position the rotating wheel 1 to prevent it from shifting during rotation, further ensuring transmission stability.

[0031] See Figures 2-3 As shown, a limiting part 44 is provided on the side wall opposite to the through groove 41 of the limiting shell 4. The limiting part 44 is a protruding structure integrally formed on the side wall of the limiting shell 4, located on the inner side wall opposite to the through groove 41, and located at the edge of the mounting groove 42. The limiting part 44 is used to limit the rotation range of the gear part 12, to prevent the rotating wheel 1 from rotating excessively and causing the connecting rod 2 to exceed its stroke, damaging the transmission locking mechanism itself, or disengaging from the connecting rod 2, thus improving the safety of use; no additional electronic limiting device or parts are required to achieve the limiting, resulting in low cost and high reliability; the limiting part 44 is integrally formed with the limiting shell 4, with a simple structure, requiring no additional assembly, simplifying the production process and reducing assembly difficulty.

[0032] See Figures 2-3As shown, the fixing plate 3 near the mounting groove 42 covers the opening of the mounting groove 42, and the length of the fixing plate 3 is less than the length of the opening of the mounting groove 42. In this embodiment, the length direction of the fixing plate 3 is consistent with the length direction of the connecting rod 2. The fixing plate 3 near the mounting groove 42 covers the opening of the mounting groove 42, forming a closed protection for the mounting groove 42; the opening of the mounting groove 42 also provides a locking space for the fixing plate 3, making the connection between the fixing plate 3 and the limiting shell 4 more stable, improving the transmission reliability of the transmission locking mechanism, and extending the service life of the transmission locking mechanism.

[0033] See Figure 2 As shown, this embodiment of the transmission locking mechanism for small center distances further includes: two anti-pull-off blocks 5; the anti-pull-off blocks 5 are provided with mutually perpendicular insertion portions 51 and bending portions 52; two slots 46 are provided on one side wall of the limiting shell 4 where the mounting groove 42 is located, the two slots 46 are symmetrically arranged on both sides of the opening of the mounting groove 42, the two insertion portions 51 are respectively inserted into the two slots 46, and the two bending portions 52 are bent and extended from the two insertion portions 51 to the side away from each other. Preferably, the insertion portion 51 is a rectangular sheet structure, and the bending portion 52 is formed by bending one end of the insertion portion 51 vertically. The anti-pull-off blocks 5 can withstand the axial tension transmitted by the connecting rod 2, avoid the tension being concentrated at the meshing part of the gear part 12 and the transmission hole 21, prevent the meshing part from being damaged due to excessive force, and improve the tensile strength of the mechanism.

[0034] In a further embodiment, the limiting shell 4 is made of plastic. More specifically, the limiting shell 4 is injection molded from plastic. The cost of the plastic limiting shell 4 is lower than that of a metal shell, effectively reducing the overall cost of the transmission locking mechanism and meeting the design requirements of low cost; the plastic material is lightweight, which can reduce the weight of the mechanism compared to a metal shell, making it easier to install and reducing the load on application carriers such as doors and windows; the plastic material has good moldability, and complex structures such as the mounting groove 42, through groove 41, and second through hole 43 can be injection molded in one go, with high processing efficiency and guaranteed dimensional accuracy; and the plastic material has a certain degree of cushioning, which can reduce the noise when the rotating wheel 1 rotates and improve the user experience.

[0035] See Figure 2As shown, the connecting rod 2 has positioning grooves 22 on its symmetrical side walls, and the transmission hole 21 is located between the two positioning grooves 22; the two fixing plates 3 are respectively embedded in the two positioning grooves 22 at their ends near the through groove 41. The positioning grooves 22 of the connecting rod 2 are opened in the middle of its symmetrical side walls and are rectangular groove structures. The transmission hole 21 is located between the two positioning grooves 22, and the width of the positioning grooves 22 is adapted to the thickness of the fixing plates 3. In specific implementation, the connecting rod 2 is placed between the two fixing plates 3 that are installed with the rotating wheel 1 and the limiting shell 4. The position of the connecting rod 2 is adjusted so that the ends of the two fixing plates 3 near the through groove 41 are aligned with the corresponding positioning grooves 22. The fixing plates 3 are slowly pushed so that the ends of the fixing plates 3 near the through groove 41 are fully embedded in the positioning grooves 22. At this time, the connecting rod 2 is positioned with the fixing plates 3 through the positioning grooves 22, and the transmission hole 21 is aligned with the gear part 12 of the rotating wheel 1, which facilitates subsequent meshing and assembly. The positioning groove 22 cooperates with the fixing plate 3 to achieve precise positioning of the connecting rod 2 between the two fixing plates 3, ensuring that the transmission hole 21 and the gear part 12 can be quickly aligned and meshed, improving assembly efficiency; the positioning groove 22 can limit the lateral displacement of the connecting rod 2, preventing the connecting rod 2 from deviating during transmission, ensuring that the gear part 12 and the transmission hole 21 are always precisely meshed, improving transmission stability; there is no need to set additional positioning pins, bolts and other positioning components, the positioning is achieved by the embedded cooperation of the positioning groove 22 and the fixing plate 3, which simplifies the structure, reduces costs and reduces assembly steps.

[0036] See Figure 2 As shown, this embodiment of the transmission locking mechanism applicable to small center distance also includes: two mounting seats 6 and a panel 7; the two ends of the connecting rod 2 are respectively fixedly connected to the two mounting seats 6; a limiting groove 71 is provided on one side of the panel 7, the mounting seat 6 passes through the limiting groove 71, and the fixing plate 3 is located between the inner sidewalls of the limiting groove 71. During installation, the two mounting seats 6 are respectively inserted into the two ends of the connecting rod 2, and the two ends of the connecting rod 2 are fixedly connected to the mounting seats 6 by snap-fit, interference fit or riveting; then the connecting rod 2 is installed on the assembled rotating wheel 1, limiting shell 4 and fixing plate 3; after filling the oil reservoir with lubricating oil, the limiting groove 71 of the panel 7 is aligned with the mounting seat 6 so that the mounting seat 6 is inserted into the limiting groove 71; then the panel 7 and the fixing plate 3 are fixed by stamping or other means, and finally the anti-pull-out block 5 is installed to complete the installation of the transmission locking mechanism. Mounting base 6 enhances the structural strength of both ends of connecting rod 2, preventing deformation of both ends of connecting rod 2 during transmission, and provides an interface for connecting rod 2 to external components; panel 7 provides protection and decoration for the entire mechanism, preventing internal components from being exposed to the outside and damaged or contaminated, and improving the aesthetics of the mechanism; limiting groove 71 of panel 7 limits the mounting base 6 and fixing plate 3, further ensuring the positional stability of each component of the mechanism and improving the overall structural stability.

[0037] In a further embodiment, the mounting base 6 is made of plastic. The mounting base 6, injection molded from plastic, is lightweight and low-cost, which helps reduce the installation cost of the transmission locking mechanism and lowers production difficulty.

[0038] See Figure 2 As shown, the fixing plate 3 has a first limiting protrusion 33 on its mutually distant sidewalls, and a second limiting protrusion (not shown) protruding towards the fixing plate 3 on both inner sidewalls of the limiting groove 71. The first limiting protrusion 33 and the second limiting protrusion are staggered. Preferably, the difference in the number of the first limiting protrusion 33 and the second limiting protrusion on the mutually close side is one. For example, there are two first limiting protrusions 33 on the side closer to the groove opening of the mounting groove 42, and three second limiting protrusions, which are staggered from the first limiting protrusion 33. The staggered cooperation of the first limiting protrusion 33 and the second limiting protrusion can effectively limit the relative displacement between the fixing plate 3 and the panel 7, preventing the panel 7 from shifting or falling off during use, and improving the overall stability of the mechanism; no additional bolts, clips, or other fixing components are required, and fixing is achieved through the staggered cooperation of the protrusions, simplifying the structure, reducing costs, and reducing assembly steps, thus improving assembly efficiency.

[0039] In a preferred embodiment, the second limiting protrusion is formed by pressing the panel 7 inward after it has been installed with the fixing plate 3. The first limiting protrusion 33 and the second limiting protrusion have simple structures and are integrally formed with the fixing plate 3 and the panel 7 respectively, requiring no additional assembly, which significantly improves the installation efficiency of the fixing plate 3 and the panel 7.

[0040] See Figure 2 As shown, this embodiment of the transmission locking mechanism applicable to small center distances also includes: two rivets 8; each end of the connecting rod 2 is provided with a second mounting hole 25, and the two rivets 8 are respectively inserted into the two second mounting holes 25 and riveted to the connecting rod 2. During installation, the two rivets 8 are aligned with the second mounting holes 25 and inserted, ensuring that the shank of the rivet 8 passes through the second mounting hole 25; then, a riveting tool is used to rivet the rivets 8 so that the rivets 8 are tightly fitted to the surface of the connecting rod 2, so as to firmly rivet the rivets 8 to the connecting rod 2. The riveting of the rivets 8 can achieve a firm connection between the connecting rod 2 and the mounting seat 6, preventing the mounting seat 6 from falling off during transmission and improving structural stability; compared with bolt connection, the riveting of the rivets 8 does not require thread processing, simplifying the processing process and reducing costs; after riveting, the structure is compact, without any protruding parts similar to bolts, avoiding interference with other parts, and reducing the number of parts, simplifying the structure; the riveting operation is simple, the assembly efficiency is high, and it is suitable for mass production.

[0041] See Figure 2 and Figure 8As shown, the connecting rod 2 has two first receiving holes 23, and the two mounting seats 6 each have a second receiving hole 61 corresponding to the first receiving holes 23. The first receiving holes 23 and the second receiving holes 61 communicate to form an oil storage hole. In front of the assembly panel 7, lubricating oil is squeezed into the oil storage hole through the opening of the oil storage hole, i.e., the top opening of the second receiving hole 61, until the lubricating oil fills to the preset height of the oil storage hole, thus completing the oil storage operation. The oil storage hole can store lubricating oil. During the transmission and locking mechanism, the lubricating oil can slowly seep out to lubricate the meshing parts of the gear part 12 and the transmission hole 21, and the mating parts of the rotating wheel 1 and the fixed plate 3, reducing component wear and extending the service life of the mechanism.

[0042] See Figure 2 As shown, the connecting rod 2 has slots 24 at both ends, and the mounting base 6 has a locking protrusion 62 on one side, which engages with the slots 24. The slots 24 are located on the side wall of the connecting rod 2. During installation, the locking protrusion 62 of the mounting base 6 is aligned with the slots 24 at both ends of the connecting rod 2, and the mounting base 6 is pushed so that the locking protrusion 62 is fully engaged in the slot 24. After engagement, the mounting base 6 and the connecting rod 2 are positioned by the locking protrusion 62 and the slots 24. The engagement structure can withstand a certain lateral force, preventing the mounting base 6 from shifting laterally during transmission, and simultaneously improving the connection stability between the connecting rod 2 and the mounting base 6.

[0043] In a further embodiment, panel 7 is made of aluminum alloy. The aluminum alloy panel 7 has high strength, effectively protecting the internal parts of the mechanism and preventing damage from external impacts; it is also lightweight, reducing the overall weight of the mechanism compared to steel panel 7, making installation easier; furthermore, the aluminum alloy panel 7 can undergo various surface treatments, achieving high forming precision and an aesthetically pleasing appearance, enhancing the overall aesthetics of the mechanism and meeting the appearance requirements of different application scenarios.

[0044] See Figure 2As shown, this embodiment of the transmission locking mechanism applicable to small center distance also includes: a plurality of rivet shafts 9; the fixing plate 3 is provided with a plurality of first mounting holes 34, and the plurality of rivet shafts 9 pass through the first mounting holes 34 and are riveted to the fixing plate 3. During installation, the rivet shafts 9 are first aligned with the first mounting holes 34 of the fixing plate 3 assembled with the rotating wheel 1 and the limiting shell 4, and the plurality of rivet shafts 9 are sequentially inserted into the first mounting holes 34 to ensure that the lengths of the two ends of the rivet shafts 9 extending out of the fixing plate 3 are consistent; then, a riveting tool is used to rivet the two ends of the rivet shafts 9, so that the two ends of the rivet shafts 9 are deformed to form shaft heads, which are tightly attached to the surface of the fixing plate 3, and the two fixing plates 3 are firmly riveted together. At this time, a stable installation space is formed between the two fixing plates 3. The riveting shaft 9 enables a firm connection between the two fixed plates 3, ensuring a stable gap between the two plates and providing a stable installation space for internal components. This prevents the fixed plates 3 from loosening during transmission, which could lead to component displacement. Compared to bolt connections, the riveting shaft 9 eliminates the need for thread processing, resulting in lower processing costs and higher assembly efficiency, making it suitable for mass production. The riveted structure is compact, without any protruding parts similar to bolts, thus avoiding interference with other components. Furthermore, the high strength of the riveting shaft 9 allows it to withstand greater clamping forces, enhancing the overall structural strength of the mechanism.

[0045] See Figure 2 As shown, the limiting shell 4 is also provided with through holes 45, which correspond to the first mounting holes 34. The rivet shaft 9 passes through the through holes 45 and is riveted to the fixing plate 3 on the other side. The number of through holes 45 on the limiting shell 4 is the same as the number of first mounting holes 34 on the fixing plate 3, and their positions correspond one-to-one. The rivet shaft 9 passes through the through holes 45 to fix the limiting shell 4 and the fixing plate 3 at the same time, preventing the limiting shell 4 from shifting during the transmission of the mechanism, further ensuring the positioning function of the limiting shell 4 on the rotating wheel 1, and improving the transmission stability; there is no need to set up additional components to fix the limiting shell 4, and the fixing of the limiting shell 4 and the fixing plate 3 are achieved by the existing rivet shaft 9, which reduces the number of parts, simplifies the structure, and reduces costs; at the same time, it reduces the assembly steps, and there is no need to assemble the limiting shell 4 separately, which improves the assembly efficiency.

[0046] In a further embodiment, the fixing plate 3 is made of stainless steel. Preferably, the connecting rod 2 is also made of stainless steel. More specifically, the fixing plate 3 and the connecting rod 2 are stamped from stainless steel sheet. The stainless steel fixing plate 3 has high strength, providing stable support for components such as the rotating wheel 1 and the connecting rod 2, bearing the forces during transmission, preventing deformation of the fixing plate 3 and the connecting rod 2, and improving the overall strength of the mechanism; stainless steel has good corrosion resistance, is not prone to rusting in humid or outdoor environments, and extends the service life of the mechanism; the stamping process of stainless steel sheet is efficient, ensuring the dimensional accuracy of the fixing plate 3 and the connecting rod 2, ensuring the matching accuracy with other components, and improving assembly quality; compared with zinc alloy, the stainless steel fixing plate 3 is lower in cost and has more guaranteed strength.

[0047] In a further embodiment, the rotating wheel 1 is made of zinc alloy. The rotating wheel 1 is formed by die casting of zinc alloy. Zinc alloy rotating wheel 1 has good die-casting properties, allowing for precise fabrication of irregular structures such as gear parts 12 and arc-shaped protrusions 13, ensuring dimensional accuracy and the precision of its fit with the connecting rod 2 and the fixed plate 3. Zinc alloy has sufficient strength to withstand the meshing forces during transmission, preventing damage to the gear parts 12 and ensuring stable transmission. Compared to pure stainless steel rotating wheel 1, zinc alloy rotating wheel 1 has lower die-casting costs and is lighter, reducing the overall weight of the mechanism. The surface of zinc alloy can be passivated to improve corrosion resistance and extend service life.

[0048] See Figures 2-11 As shown, the following are the installation steps for the transmission locking mechanism applicable to small center distances in this embodiment: See Figure 3 As shown, the installation step one is as follows: Insert the rotating wheel 1 into the mounting groove 42 of the limiting shell 4, so that the arc-shaped protrusion 13 of the rotating wheel 1 and the rotating shaft 14 on the same side extend to the outside through the groove of the mounting groove 42, and the rotating shaft 14 on the side away from the arc-shaped protrusion 13 passes through the second through hole 43 of the limiting shell 4; place the two fixing plates 3 symmetrically on both sides of the limiting shell 4, so that the first through hole 32 of the fixing plate 3 is aligned with the rotating shaft 14 of the rotating wheel 1 and the insertion is completed, so that the arc-shaped groove 31 of the fixing plate 3 is fitted over the arc-shaped protrusion 13 of the rotating wheel 1.

[0049] See Figure 2 and Figure 4 As shown, installation step two: Align the first mounting hole 34 of the fixing plate 3 with the through hole 45 of the limiting shell 4, insert the riveting shaft 9 and rivet it to fix it, so that the two fixing plates 3 and the limiting shell 4 form a whole.

[0050] See Figure 5 As shown, installation step three: insert rivet 8 into the second mounting hole 25 of connecting rod 2 and rivet it in place.

[0051] See Figure 6 As shown, installation step four: Connect both ends of the connecting rod 2 to the snap-fit ​​protrusion 62 of the mounting base 6 through the snap-fit ​​groove 24.

[0052] See Figure 2 and Figure 7 As shown, installation step five: Place the connecting rod 2 between the two fixing plates 3, so that the transmission hole 21 of the connecting rod 2 meshes with the protruding tooth 121 of the rotating wheel 1, and the positioning groove 22 fits into the fixing plate 3.

[0053] See Figure 8 As shown, installation step six: squeeze lubricating oil into the oil storage hole formed by the connection between the first receiving hole 23 and the second receiving hole 61.

[0054] See Figure 9As shown, installation step seven: Align the limiting groove 71 of the panel 7 with the mounting base 6, and push the panel 7 along the length of the connecting rod 2 so that the mounting base 6 enters the limiting groove 71.

[0055] See Figure 10 As shown, installation step eight: A second limiting protrusion is formed by stamping on the panel 7 at the position corresponding to the first limiting protrusion 33, so that the first limiting protrusion 33 and the second limiting protrusion form a toothed meshing structure, thus completing the fixation of the panel 7 and the fixing plate 3.

[0056] See Figure 11 As shown, installation step nine: Insert the plug part 51 of the anti-pull block 5 into the slot 46 of the limiting shell 4 to complete the installation of the entire locking transmission mechanism.

[0057] Therefore, it can be seen that the transmission locking mechanism of this embodiment is suitable for small center distances. It has a simple and compact structure and is suitable for door and window transmission locking applications with small center distances, such as 10 center distances. It also has fewer parts and a simple installation method, which significantly shortens the overall production and assembly time and helps to improve the market influence of the transmission locking mechanism.

[0058] This embodiment provides a transmission locking mechanism suitable for small center distances. By setting a gear on the outer periphery of the rotating wheel, which directly meshes with the transmission hole on the connecting rod, the rotating wheel rotates and drives the connecting rod to move through the meshing action to transmit the locking action. Two symmetrically fixed plates form a clamping support for the rotating wheel and the connecting rod, ensuring the coaxiality and stability of the movement of each component. By setting an arc-shaped protrusion on the rotating wheel between the gear and the shaft hole, and setting an arc-shaped groove on the fixed plate to accommodate the arc-shaped protrusion, the rotation of the rotating wheel is limited and guided. This fundamentally avoids the strength defects of traditional cantilever transmission shafts that are prone to bending and breakage in small center distance scenarios, and significantly improves the structural strength and failure resistance of the mechanism in small center distance applications.

[0059] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A transmission locking mechanism suitable for small center distances, characterized in that, include: A rotating wheel, wherein the center of the rotating wheel is provided with a shaft hole, the outer peripheral edge of the rotating wheel is provided with a gear part, and an arc-shaped protrusion is provided between the shaft hole and the gear part; A connecting rod, wherein a transmission hole is provided on the connecting rod to mesh with the gear part of the rotating wheel; Two fixed plates are symmetrically arranged and fixed to each other. A connecting rod is located between the two fixed plates. A rotating wheel is rotatably connected between the two fixed plates and meshes with the connecting rod for transmission. At least one of the fixed plates is provided with an arc-shaped groove, and an arc-shaped protrusion passes through the arc-shaped groove.

2. The transmission locking mechanism suitable for small center distances according to claim 1, characterized in that, The fixing plate is provided with a first through hole, and both ends of the rotating wheel are provided with rotating shafts. The rotating shafts extend outward along the axial direction of the rotating wheel, and the two rotating shafts are respectively inserted through the two first through holes.

3. The transmission locking mechanism suitable for small center distances according to claim 2, characterized in that, Also includes: A limiting shell is disposed between the connecting rod and the two fixing plates. The limiting shell has a through groove on the side facing the connecting rod. The two side walls adjacent to the side wall where the through groove is located are respectively provided with mounting grooves and second through holes. The through groove and the second through hole are respectively connected to the mounting groove. The rotating wheel is embedded in the mounting groove. The arc-shaped protrusion extends through the mounting groove to the arc-shaped groove. The rotating shaft on the side away from the arc-shaped protrusion passes through the second through hole. The gear part extends from the mounting groove through the through groove to the connecting rod.

4. The transmission locking mechanism suitable for small center distances according to claim 3, characterized in that, The limiting shell is made of plastic.

5. The transmission locking mechanism suitable for small center distances according to claim 1, characterized in that, Also includes: Two mounting bases and a panel; the two ends of the connecting rod are respectively fixedly connected to the two mounting bases; a limiting groove is provided on one side of the panel, the mounting base passes through the limiting groove, and the fixing plate is located between the inner sidewalls of the limiting groove.

6. The transmission locking mechanism suitable for small center distances according to claim 5, characterized in that, The fixing plate has a first limiting protrusion on its mutually distant sidewalls, and the two inner sidewalls of the limiting groove have a second limiting protrusion protruding towards the fixing plate. The first limiting protrusion and the second limiting protrusion are offset from each other.

7. The transmission locking mechanism suitable for small center distances according to claim 5, characterized in that, The connecting rod is provided with two first receiving holes, and the two mounting seats are respectively provided with second receiving holes corresponding to the first receiving holes. The first receiving holes and the second receiving holes are connected to form an oil storage hole.

8. The transmission locking mechanism suitable for small center distances according to claim 1, characterized in that, Also includes: A plurality of rivet shafts; the fixing plate is provided with a plurality of first mounting holes, and the plurality of rivet shafts pass through the first mounting holes and are riveted to the fixing plate.

9. The transmission locking mechanism suitable for small center distances according to claim 1, characterized in that, The fixing plate is made of stainless steel.

10. The transmission locking mechanism suitable for small center distances according to claim 1, characterized in that, The impeller is made of zinc alloy.

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