Opening and closing transmission mechanism

Abstract

The utility model relates to an opening and closing transmission mechanism, which includes a gear frame, a rotating assembly and an assembly pin. The gear frame is provided with a gear cavity and a belt opening for passing a shuttle transmission belt. The rotating assembly includes a pulley located in the gear cavity, the pulley is rotatably connected to the gear frame, and the assembly pin is inserted to connect the gear frame and the pulley. The assembly pin is inserted to fix the gear frame and the pulley to lock the connection between the three, and the disassembly and assembly are convenient. The pulley is used to connect the transmission belt, reduce the height size of the gear frame, thereby realizing flexible adjustment of the installation position of the driving part and the gear frame, and simplifying the transmission box structure.

Description

Technical Field

[0001] The utility model relates to the technical field of blinds, in particular to a vertical blind, and more particularly to an opening and closing transmission mechanism. Background Art

[0002] The electric curtain is equipped with a transmission box device for transferring power, wherein the transmission box device includes a main transmission box and an auxiliary transmission box. The main transmission box and the auxiliary transmission box are each provided with a pulley connected to the transmission belt, and the pulley is mounted on the transmission frame. The transmission frame is provided with a rotating shaft, and the pulley is rotatably connected to the rotating shaft.

[0003] The existing transmission frame has an assembly groove at the top, a rotating shaft is positioned within the groove, and a pulley is rotatably mounted on the rotating shaft, forming a single unit. The transmission frame and pulley are then mounted laterally to the housing, creating a side-mounted, drawer-style assembly structure. However, the side-mounted transmission frame requires complete disassembly of the housing during assembly or maintenance, making repairs difficult. Furthermore, the pulley presents technical challenges in assembling and debugging, thus requiring improvement. Utility Model Content

[0004] In order to overcome the problems existing in the related art, an embodiment of the present utility model provides an opening and closing transmission mechanism.

[0005] According to the first aspect of the embodiment of the utility model, an opening and closing transmission mechanism is provided, which includes a gear frame, a rotating component and an assembly pin. The gear frame is provided with a gear cavity and a belt port for a shuttle transmission belt. The rotating component includes a pulley located in the gear cavity, the pulley is rotatably connected to the gear frame, and the assembly pin is inserted and connected between the gear frame and the pulley.

[0006] In one embodiment, the gear rack includes a mounting seat and a buckle plate buckled on the mounting seat, and the pulley is rotatably connected to the mounting seat.

[0007] In one embodiment, the pinch plate is provided with a plug-in column, the plug-in column is plug-connected to the pulley, and the assembly pin is plugged into the plug-in column.

[0008] In one embodiment, the pinch plate includes a stepped hole recessed along the center line of the plug-in column, and the assembly pin is adapted to fit into the stepped hole.

[0009] In one embodiment, the mounting seat includes a rotating column formed by a tubular protrusion from the bottom of the gear cavity, and the pulley is rotatably mounted on the rotating column.

[0010] In one embodiment, the rotating assembly further includes a bevel gear, which is located outside the gear rack and connected to the pulley.

[0011] In one embodiment, the pulley is plug-connected to the bevel gear, and the assembly pin is plug-connected to the bevel gear.

[0012] In one embodiment, the bevel gear is provided with at least two reinforcing ribs, and the pulley is inserted into the bevel gear and engages with the reinforcing ribs.

[0013] In one embodiment, the end of the assembly pin passes through the bevel gear, and the end of the assembly pin is used for rotatably plugging and connecting to the transmission housing.

[0014] In one embodiment, the assembly pin is provided with a drawing portion, and the drawing portion is located outside the gear rack.

[0015] The technical solution provided by the embodiments of the present invention can provide the following beneficial effects: the assembly pins penetrate and secure the gear rack and pulley, locking the three together and facilitating assembly and disassembly. The pulley is used to connect the drive belt, reducing the height of the gear rack, thereby enabling flexible adjustment of the mounting position of the drive unit and the gear rack, and simplifying the transmission box structure.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0018] Figure 1 The figure is a schematic structural diagram showing an opening and closing transmission mechanism according to an exemplary embodiment.

[0019] Figure 2 The figure is a schematic cross-sectional view of an opening and closing transmission mechanism according to an exemplary embodiment.

[0020] Figure 3 is an exploded schematic diagram showing an opening and closing transmission mechanism according to an exemplary embodiment.

[0021] Figure 4 The diagram is a schematic diagram showing the connection between an opening and closing transmission mechanism and an opening and closing transmission assembly according to an exemplary embodiment.

[0022] In the figure, the gear frame 10; the mounting seat 11; the rotating column 111; the buckle plate 12; the plug-in column 121; the stepped hole 122; the gear cavity 13; the assembly pin 20; the pulling portion 21; the buckle groove 211; the rotating component 30; the pulley 31; the rotating groove 311; the shaft hole 312; the plug-in portion 313; the torque groove 314; the bevel gear 32; the reinforcing rib 321; the opening and closing transmission component 40; and the transmission box 50. DETAILED DESCRIPTION

[0023] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0026] like Figures 1 to 3 As shown, the present invention provides an opening and closing transmission mechanism, which includes a gear frame 10, a rotating assembly 30, and an assembly pin 20. The gear frame 10 is provided with a gear cavity 13 and two belt openings for a shuttle drive belt. The rotating assembly 30 includes a pulley 31 located within the gear cavity 13 and rotatably connected to the gear frame 10. The assembly pin 20 extends through the gear frame 10 and connects the pulley 31.

[0027] Pulley 31 connects to the transmission belt, enabling flexible adjustment of the mounting position of the drive unit and gear rack 10, simplifying the transmission case structure. Furthermore, the pulley 31, installed within the gear rack 10, reduces the height of the gear rack 10 while allowing for adjustment of the transmission connection position, enhancing ease of adjustment. An assembly pin 20 extends through the gear rack 10 and secures the pulley 31, locking the three together and facilitating assembly and disassembly.

[0028] In one embodiment, a pulley 31 is mounted within the gear frame 10 to form a tensioning mechanism for the transmission belt. The gear frame 10 is mounted at one end of the track assembly to form a transmission box. In an alternative embodiment, the pulley 31 is mounted on the gear frame 10 and directly connected to a power motor to drive the transmission belt. For example, the pulley 31 and the gear frame 10 form a drive mechanism for opening and closing a curtain.

[0029] In another embodiment, the rotating assembly 30 includes a pulley 31 and a bevel gear 32. The pulley 31 and bevel gear 32 are detachably connected for assembly and installation on the gear frame 10. Alternatively, the pulley 31 and bevel gear 32 are plug-fitted together to form an integral structure, such as by using complementary tooth profiles. Alternatively, the pulley 31 and bevel gear 32 are matingly connected and laterally locked into an integral structure by a fastener.

[0030] The bevel gear 32 connects to the opening and closing transmission assembly 40. The pulley 31 and bevel gear 32 are arranged in separate areas on the gear frame 10, with the pulley 31 mounted inside the gear frame 10 and the bevel gear 32 located outside. The pulley 31 connects to the drive belt, and the bevel gear 32 connects to the opening and closing transmission assembly 40. The opening and closing transmission assembly 40 is connected to the power drive unit to generate the driving force for opening and closing the curtain. The drive belt connects to the track assembly of the electric curtain to drive the curtain's opening and closing motion.

[0031] Preferably, the gear rack 10 includes a mounting base 11 and a pinch plate 12 that is snapped onto the mounting base 11. The pulley 31 is rotatably connected to the mounting base 11. The assembly pin 20 passes through the pinch plate 12 and is connected to the pulley 31. The mounting base 11 is a thin-walled structural member. The mounting base 11 is partially recessed from the top to form a groove. The pinch plate 12 covers the opening of the mounting base 11 to form a gear cavity 13.

[0032] The pulley 31 is installed into the gear cavity 13 from the opening of the mounting base 11, and the bevel gear 32 is connected to the pulley 31 from the outside of the mounting base 11 to form an assembly structure. Preferably, the mounting base 11 includes a rotating column 111 formed by a tubular protrusion from the bottom of the gear cavity 13. The rotating column 111 is a hollow tube structure, and the rotating assembly 30 can be rotatably mounted on the rotating column 111. The pulley 31 is provided with an axially recessed rotating groove 311, and the rotating groove 311 is engaged with the rotating column 111 so that the pulley 31 can rotate relative to the rotating column 111 and maintain axial positioning. Gear teeth are provided on the outside of the pulley 31, and an axial hole 312 coaxial with the rotating column 111 is provided in the center of the pulley 31.

[0033] The bevel gear 32 is located outside the mounting base 11 and is assembled and connected to the pulley 31 . The size of the bevel gear 32 is larger than the hole size of the rotating column 111 , so that the bevel gear 32 and the pulley 31 define and connect the rotating column 111 .

[0034] like Figures 2 to 4 As shown, the pinch plate 12 is snapped onto the mounting base 11 to define the top of the pulley 31. Further preferably, the pinch plate 12 is provided with a plug-in post 121, which is plugged into the pulley 31, and the assembly pin 20 is plugged into the plug-in post 121. The plug-in post 121 is inserted into the shaft hole 312 of the pulley 31 to locate the position of the pulley 31. The plug-in post 121 and the rotation post 111 provide a comprehensive definition, maintaining the appropriate rotation of the pulley 31 while preventing movement.

[0035] The assembly pin 20 is inserted into the plug post 121 to connect the pinch plate 12 to the rotating assembly 30. The assembly pin 20 extends through the mounting base 11 and connects to the bevel gear 32. The bevel gear 32 can rotate around the assembly pin 20, forming a rotating structure. Alternatively, the bevel gear 32 is connected to the pulley 31 and has a clearance fit with the assembly pin 20; alternatively, the bevel gear 32 is connected to the pulley 31 and has a plug-in fit with the assembly pin 20.

[0036] Furthermore, the gusset plate 12 includes a stepped hole 122 recessed along the centerline of the plug post 121. The assembly pin 20 fits into the stepped hole 122, with the distal end of the assembly pin 20 extending through the mounting base 11. The assembly pin 20 is a stepped pin structure, inserted into the stepped hole 122 to define the assembly pin 20. The cross-sectional dimensions of the assembly pin 20 in the stepped hole 122 region are large, enhancing overall rigidity.

[0037] In one embodiment, the pulley 31 is plugged into the bevel gear 32, and the assembly pin 20 is plugged into the bevel gear 32. The pulley 31 is provided with a tubular plug-in portion 313, which is inserted into the rotating column 111. The distal end of the plug-in portion 313 extends through the mounting base 11 and plugs into the bevel gear 32. The plug-in post 121 of the pinch plate 12 is plugged into the plug-in portion 313 to provide centering.

[0038] The plug-in portion 313 is plug-fitted and connected to the bevel gear 32 for integrated transmission. Optionally, the plug-in portion 313 and the bevel gear 32 are assembled and fixed with lateral fasteners to achieve connection between the two and transmit torque. Optionally, the plug-in portion 313 is plug-connected to the bevel gear 32 and snap-fitted with the bevel gear 32 for locking. Among them, the end of the plug-in portion 313 is provided with a barb, and the bevel gear 32 is provided with a slot for elastic snap-fit ​​connection. Optionally, the plug-in portion 313 is plug-fitted and connected to the bevel gear 32, and the two form a sliding fit, the assembly pin 20 is plug-fitted and connected to the bevel gear 32, and the axial position of the bevel gear 32 can be matched and limited by the transmission housing 50.

[0039] In one embodiment, the end of the assembly pin 20 passes through the bevel gear 32, and the end of the assembly pin 20 is used to rotatably connect to the transmission housing 50. The rotating assembly 30 is assembled through the assembly pin 20 and the transmission housing 50, and the movable space position of the bevel gear 32 is adjusted.

[0040] The pulley 31 is plugged into the bevel gear 32 to further enhance torque transmission. The bevel gear 32 is equipped with at least two reinforcing ribs 321. The pulley 31 is inserted into the bevel gear 32 and engages the reinforcing ribs 321. The end of the plug-in portion 313 is provided with torque grooves 314, each of which engages with two sides of the reinforcing rib 321 to achieve torque transmission. Preferably, the number of reinforcing ribs 321 is two, three, four, five, or six, and the plug-in portion 313 is provided with torque grooves 314 corresponding to the position and angle of the reinforcing ribs 321 to achieve plug-in fit and transmit torque.

[0041] The assembly pin 20 is inserted into the rotating assembly 30 from the latch plate 12. Preferably, the assembly pin 20 is provided with a laterally recessed pullout portion 21, which is located outside the gear rack 10. The pullout portion 21 is located at the end of the assembly pin 20 to form an end positioning structure. The outer diameter of the pullout portion 21 is larger than the diameter of the stepped hole 122, thereby providing abutment and positioning.

[0042] Preferably, the lateral local depression of the pulling portion 21 forms a buckle groove 211, and the buckle groove 211 is used to facilitate the pulling out of the assembly pin 20 from the gear frame 10 during maintenance, thereby improving the convenience of disassembly and assembly.

[0043] Those skilled in the art will readily envision other embodiments of the present invention after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present invention being indicated by the following claims.

[0044] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An opening and closing transmission mechanism, characterized in that: The opening and closing transmission mechanism comprises a gear frame (10), a rotating assembly (30) and an assembly pin (20); the gear frame (10) is provided with a gear cavity (13) and a belt opening for passing a shuttle transmission belt; the rotating assembly (30) comprises a pulley (31) located in the gear cavity (13); the pulley (31) is rotatably connected to the gear frame (10); and the assembly pin (20) is inserted and connected between the gear frame (10) and the pulley (31).

2. The opening and closing transmission mechanism according to claim 1, characterized in that: The gear rack (10) comprises a mounting seat (11) and a buckle plate (12) buckled on the mounting seat (11), and the pulley (31) is rotatably connected to the mounting seat (11).

3. The opening and closing transmission mechanism according to claim 2, characterized in that: The pinch plate (12) is provided with a plug-in column (121), the plug-in column (121) is plug-connected with the pulley (31), and the assembly pin (20) is plug-connected with the plug-in column (121).

4. The opening and closing transmission mechanism according to claim 3, characterized in that: The buckle plate (12) comprises a stepped hole (122) which is recessed along the center line of the plug-in column (121), and the assembly pin (20) is adapted to fit the stepped hole (122).

5. The opening and closing transmission mechanism according to claim 2, characterized in that: The mounting seat (11) comprises a rotating column (111) formed by a tubular protrusion from the bottom of the gear chamber (13), and the pulley (31) is rotatably mounted on the rotating column (111).

6. The opening and closing transmission mechanism according to claim 1, characterized in that: The rotating assembly (30) further comprises a bevel gear (32), wherein the bevel gear (32) is located outside the gear frame (10) and is connected to the pulley (31).

7. The opening and closing transmission mechanism according to claim 6, characterized in that: The belt pulley (31) is plug-connected to the bevel gear (32), and the assembly pin (20) is plug-connected to the bevel gear (32).

8. The opening and closing transmission mechanism according to claim 7, characterized in that: The bevel gear (32) is provided with at least two reinforcing ribs (321), and the pulley (31) is inserted into the bevel gear (32) and is clamped with the reinforcing ribs (321).

9. The opening and closing transmission mechanism according to claim 6, characterized in that: The end of the assembly pin (20) passes through the bevel gear (32), and the end of the assembly pin (20) is used for rotatably plugging and connecting to the transmission housing (50).

10. The opening and closing transmission mechanism according to claim 1, characterized in that: The assembly pin (20) is provided with a drawing portion (21), and the drawing portion (21) is located outside the gear rack (10).

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