Transmission mechanism

Abstract

The utility model relates to a transmission mechanism. The transmission mechanism comprises a transmission box body, a transmission shaft and two transmission assemblies coaxially arranged on the transmission box body at intervals, each transmission assembly comprises an electromagnetic clutch mechanism and a transmission gear, and each transmission gear is provided with a clutch cavity and two ball grooves. The electromagnetic clutch mechanism comprises an electromagnetic mechanism, a clutch rotating frame, an iron sheet and two magnetic beads, the clutch rotating frame is in transmission connection with the transmission shaft, the two magnetic beads are located on the two sides of the clutch rotating frame respectively and attracted to the iron sheet, and the iron sheet is attracted to the side, facing the electromagnetic mechanism, of the clutch rotating frame. A movable gap is formed between the iron sheet and the electromagnetic mechanism, and the electromagnetic mechanism adsorbs the iron sheet when being electrified. The electromagnetic mechanism magnetically attracts the iron sheets and the magnetic beads, so that one transmission assembly performs independent transmission or two transmission assemblies perform combined transmission, and the structure is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of shading, in particular to an opening and closing curtain, and in particular to a transmission mechanism. Background Art

[0002] The opening and closing curtain comprises a track device and a left curtain and a right curtain which are relatively opened and closed along the track device. Conventionally, the left curtain and the right curtain are opened or closed at the same time; or, two motors are used to control the left curtain and the right curtain separately.

[0003] However, opening or closing curtains at the same time is not suitable for some application scenarios where only one side needs to be opened, and the user experience is poor. Using two motors to separately control the left and right curtains is not only costly, but also has technical problems such as complex control systems, so improvements are needed. Utility Model Content

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

[0005] According to a first aspect of an embodiment of the utility model, a transmission mechanism comprises a transmission housing, a transmission shaft and two groups of transmission components coaxially arranged with the transmission housing at intervals, each group of the transmission components comprises an electromagnetic clutch mechanism and a transmission gear, the transmission gear is provided with a concave clutch cavity and two ball grooves distributed on the wall surface of the clutch cavity;

[0006] The electromagnetic clutch mechanism comprises an electromagnetic mechanism, a clutch rotating frame, an iron sheet and two magnetic beads, the clutch rotating frame is in driving connection with the transmission shaft, the two magnetic beads are respectively located on both sides of the clutch rotating frame and adsorbed on the iron sheet, the iron sheet is adsorbed on the side of the clutch rotating frame facing the electromagnetic mechanism, and there is a movable gap between the iron sheet and the electromagnetic mechanism;

[0007] The electromagnetic mechanism absorbs the iron sheet when energized, so that the iron sheet is separated from the clutch rotating frame.

[0008] In one embodiment, the clutch rotating frame includes a plate-shaped pushing portion and a columnar connecting portion protruding from the pushing portion, the connecting portion is movably connected to the iron sheet, both sides of the pushing portion are set as guide rail surfaces, and the magnetic beads are distributed on both sides of the pushing portion and move along the guide rail surfaces.

[0009] In one embodiment, a magnetic member is embedded in a side of the pushing portion facing the iron sheet.

[0010] In one embodiment, the plug-in portion abuts against the electromagnetic mechanism, and a protruding height of the plug-in portion is greater than a thickness of the iron sheet.

[0011] In one embodiment, the clutch rotating frame includes a rotating portion protruding from the pushing portion, the rotating portion and the transmission gear are plug-connected, and the transmission shaft is plug-connected to the rotating portion.

[0012] In one embodiment, the mating surface between the transmission shaft and the rotating part is provided with at least one torque surface.

[0013] In one embodiment, the electromagnetic mechanism is embedded in the transmission housing, and the wires of the electromagnetic mechanism pass through the transmission housing.

[0014] In one embodiment, the electromagnetic mechanism is configured as an electromagnet mechanism.

[0015] In one embodiment, the transmission box includes an upper transmission chamber, a lower transmission chamber and two groups of output ports corresponding to the upper transmission chamber and the lower transmission chamber. The upper transmission chamber protrudes to form an upper support column, the electromagnetic clutch mechanism is embedded in the upper support column, the transmission gear is rotatably connected to the upper support column through a rotating bearing, and another group of the transmission components is installed in the lower transmission chamber.

[0016] In one embodiment, the transmission housing is provided with a partition, and the upper transmission chamber and the lower transmission chamber are arranged back to back with respect to the partition.

[0017] The technical solution provided by the embodiment of the utility model can include the following beneficial effects: two groups of transmission components are coaxially arranged at intervals, and the electromagnetic mechanism of each group of transmission components magnetically absorbs the iron sheet and the magnetic beads, thereby realizing that one group of transmission components performs a single transmission, or two groups of transmission components perform a joint transmission, the structure is simplified, and the control effect is good. The iron sheet is movably absorbed between the clutch rotating frame and the electromagnetic mechanism, and cooperates with the transmission structure of the magnetic beads and the transmission gear to realize the clutch function, and the overall structure is ingenious.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0020] Figure 1 is a schematic structural diagram showing a transmission mechanism according to an exemplary embodiment.

[0021] Figure 2 It is a schematic diagram showing a longitudinal cross-sectional structure of a transmission mechanism according to an exemplary embodiment.

[0022] Figure 3It is a schematic diagram showing a transverse cross-sectional structure of a transmission mechanism according to an exemplary embodiment.

[0023] Figure 4 is a schematic diagram showing an exploded structure of a transmission mechanism according to an exemplary embodiment.

[0024] Figure 5 is a schematic diagram showing a cross-sectional structure of a transmission assembly according to an exemplary embodiment.

[0025] In the figure, there are transmission box 10; output port 11; upper support column 12; partition 13; lower support column 14; upper transmission chamber 15; transmission assembly 20; transmission gear 21; ball groove 211; gear tooth 212; clutch chamber 213; clutch rotating frame 22; guide rail curved surface 221; pushing part 222; rotating part 223; plug-in part 224; magnetic bead 23; iron sheet 24; electromagnetic mechanism 25; positioning rib 251; rotating bearing 26; magnetic member 27; transmission shaft 30. DETAILED DESCRIPTION

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on 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.

[0027] 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", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the 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 the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figures 1 to 5 As shown, the utility model provides a transmission mechanism, which includes a transmission box 10, a transmission shaft 30 and two groups of transmission components 20 coaxially arranged in the transmission box 10, and the transmission shaft 30 is inserted and connected with the two groups of transmission components 20, so that the transmission shaft 30 can drive one or two groups of transmission components 20 to move.

[0030] Each transmission assembly 20 includes an electromagnetic clutch mechanism and a transmission gear 21. The transmission gear 21 is provided with a concave clutch cavity 213 and two ball grooves 211 distributed on the wall of the clutch cavity 213. The clutch cavity 213 is formed by a depression on one end surface of the transmission gear 21. The gear teeth 212 of the transmission gear 21 are located on the outer peripheral wall and are used to connect the transmission belt. The ball grooves 211 are located at a position opposite to the clutch cavity 213 to cooperate with the electromagnetic clutch mechanism to realize power transmission. Among them, the clutch cavity 213 is a circular cavity.

[0031] The electromagnetic clutch mechanism includes an electromagnetic mechanism 25, a clutch rotating frame 22, an iron sheet 24 and two magnetic beads 23. The clutch rotating frame 22 is transmission-connected to the transmission shaft 30. The two magnetic beads 23 are respectively located on both sides of the clutch rotating frame 22 and adsorbed on the iron sheet 24. The iron sheet 24 is adsorbed on the side of the clutch rotating frame 22 facing the electromagnetic mechanism 25. There is a movable gap between the iron sheet 24 and the electromagnetic mechanism 25. When the electromagnetic mechanism 25 is powered on, it adsorbs the iron sheet 24 to separate the iron sheet 24 from the clutch rotating frame 22.

[0032] The iron sheet 24 is located at the opening of the clutch cavity 213, the clutch rotating frame 22 is plugged into the iron sheet 24, and at least part of the clutch rotating frame 22 is located in the clutch cavity 213. The clutch rotating frame 22 separates the clutch cavity 213 into two active areas, and the two magnetic beads 23 are respectively located in the active areas. The magnetic beads 23 are adsorbed on the iron sheet 24, and the iron sheet 24 is adsorbed on one side of the clutch rotating frame 22. The electromagnetic mechanism 25 is located outside the clutch rotating frame 22, and the iron sheet 24 moves between the clutch rotating frame 22 and the electromagnetic mechanism 25.

[0033] In the separation state, the electromagnetic mechanism 25 is powered off, the magnetic beads 23 are adsorbed on the iron sheet 24, the iron sheet 24 is adsorbed on the clutch rotating frame 22, the transmission shaft 30 drives the clutch rotating frame 22, the iron sheet 24 and the magnetic beads 23 to rotate synchronously, and the transmission gear 21 is not in a rotating state.

[0034] In the clutch driving state, the electromagnetic mechanism 25 is energized to generate a magnetic field to attract the iron sheet 24 and the magnetic beads 23, and the transmission shaft 30 drives the clutch rotating frame 22, and the clutch rotating frame 22 pushes the magnetic beads 23 into the corresponding ball grooves 211 to engage and push the transmission gear 21 to rotate synchronously. Therefore, when one electromagnetic mechanism 25 is energized, the transmission shaft 30 drives one transmission assembly 20 to transmit independently. When two electromagnetic mechanisms 25 are energized, the transmission shaft 30 drives two transmission assemblies 20 to transmit synchronously.

[0035] The two transmission components 20 are coaxially arranged at intervals, and the electromagnetic mechanism 25 of each transmission component 20 magnetically absorbs the iron sheet 24 and the magnetic bead 23, so that one transmission component 20 performs a single transmission, or the two transmission components 20 perform a joint transmission, the structure is simplified, and the control effect is good. The iron sheet 24 is movably absorbed between the clutch rotating frame 22 and the electromagnetic mechanism 25, and cooperates with the transmission structure of the magnetic bead 23 and the transmission gear 21 to realize the clutch function, and the overall structure is ingenious.

[0036] In one embodiment, the clutch rotating frame 22 includes a plate-shaped pushing portion 222 and a plug-in portion 224 protruding from the pushing portion 222 in a columnar shape, the plug-in portion 224 movably plugs into the iron sheet 24, and both sides of the pushing portion 222 are provided with guide rail curved surfaces 221, and the magnetic beads 23 are distributed on both sides of the pushing portion 222 and move along the guide rail curved surfaces 221. The guide rail curved surfaces 221 are provided on both sides of the pushing portion 222, and the guide rail curved surfaces 221 are gradually bent from the middle to both ends to form a curved surface structure.

[0037] The iron sheet 24 is a circular plate-shaped structure, and the plug-in portion 224 is plugged into the center of the iron sheet 24. In an optional embodiment, the push portion 222 is magnetic, so that the iron sheet 24 can be adsorbed by the push portion 222. When the electromagnetic mechanism 25 is powered on, the magnetic attraction force generated by the electromagnetic mechanism 25 is greater than the magnetic attraction force of the magnetic member 27, so that the iron sheet 24 and the magnetic bead 23 move toward the electromagnetic mechanism 25, and the push portion 222 rotates to push the magnetic bead 23 to move.

[0038] In another optional embodiment, the pushing portion 222 is made of non-magnetic material, and a magnetic member 27 is provided inside the pushing portion 222. Specifically, two magnetic members 27 are respectively embedded and installed in the pushing portion 222, and the magnetic members 27 face one side of the iron sheet 24, so that the iron sheet 24 can be adsorbed by the magnetic member 27 at the bottom of the pushing portion 222. When the electromagnetic mechanism 25 is powered on, the magnetic attraction force generated by the electromagnetic mechanism 25 is greater than the magnetic attraction force of the magnetic member 27, so that the iron sheet 24 and the magnetic bead 23 move toward the electromagnetic mechanism 25, and the pushing portion 222 rotates to push the magnetic bead 23 to move.

[0039] In one embodiment, the plug-in portion 224 abuts against the electromagnetic mechanism 25, and the protruding height of the plug-in portion 224 is greater than the thickness of the iron sheet 24. The plug-in portion 224 passes through the iron sheet 24 and abuts against the electromagnetic mechanism 25, thereby limiting the movable gap of the iron sheet 24. The minimum distance between the push portion 222 and the electromagnetic mechanism 25 is the movable space of the iron sheet 24. Preferably, the electromagnetic mechanism 25 is provided with an annular positioning rib 251, which protrudes toward the direction of the iron sheet 24 to support and limit the movable distance of the iron sheet 24, while maintaining a good suction effect.

[0040] In order to further improve the rotation stability of the clutch rotating frame 22, the clutch rotating frame 22 includes a rotating portion 223 protruding from the pushing portion 222, the rotating portion 223 and the transmission gear 21 are plugged and connected, and the transmission shaft 30 is plugged and connected with the rotating portion 223. The rotating portion 223 and the plug-in portion 224 are respectively located at the two ends of the pushing portion 222, and the rotating portion 223 and the groove bottom of the transmission gear 21 are plugged and connected to each other to form a rotation connection. The transmission shaft 30 passes through the electromagnetic mechanism 25 and the iron sheet 24 and is connected to the clutch rotating frame 22. Preferably, the transmission shaft 30 is connected to the rotating portion 223 and transmits torque force, wherein the mating surface of the transmission shaft 30 and the rotating portion 223 is provided with at least one torque surface. For example, the rotating portion 223 is provided with a torque hole, the torque hole is provided with at least one torque surface, and the transmission shaft 30 is provided as a chamfered shaft to match the torque hole for transmission connection. Preferably, the torque surfaces are provided as two parallel surfaces.

[0041] In one embodiment, the electromagnetic mechanism 25 is embedded in the transmission housing 10, and the wires of the electromagnetic mechanism 25 pass through the transmission housing 10. The electromagnetic mechanism 25 is embedded in the transmission housing 10 to form an assembly connection structure, which is easy to assemble and the assembly position is controllable. Preferably, the wires set by each electromagnetic mechanism 25 pass through the transmission housing 10. Preferably, the transmission housing 10 is provided with a through wire cavity, and the wire cavity is arranged parallel to the transmission shaft 30 for the wire to pass through and move. Preferably, the electromagnetic mechanism 25 is arranged as an electromagnet mechanism, and the electromagnet mechanism is connected to a power source through a wire, and the internal electromagnetic coil combines with the iron core to form a magnetic attraction, and the electric control effect is good.

[0042] In one embodiment, the transmission housing 10 includes an upper transmission chamber 15, a lower transmission chamber, and two groups of output ports 11 corresponding to the upper transmission chamber 15 and the lower transmission chamber, and the output ports 11 are used to output the transmission belt. The two groups of output ports 11 are arranged at intervals to correspond to the output rotation of the transmission belt. The upper transmission chamber 15 and the lower transmission chamber are arranged at intervals, and each chamber is correspondingly installed with a group of transmission components 20, and the transmission shaft 30 is inserted into the upper transmission chamber 15 and the lower transmission chamber to connect the two groups of transmission components 20.

[0043] The upper transmission cavity 15 protrudes to form an upper support column 12, and the electromagnetic mechanism 25 of one transmission assembly 20 is inserted and embedded in the upper support column 12. The lower transmission cavity protrudes to form a lower support column 14, and the electromagnetic mechanism 25 of another transmission assembly 20 is embedded in the lower support column 14. The upper support column 12 is provided with a rotating bearing 26, and the transmission gear 21 is rotatably connected to the upper support column 12 through the rotating bearing 26. The lower support column 14 is provided with a rotating bearing 26, and another transmission gear 21 is connected to the upper support column 12 through the rotating bearing.

[0044] 26 is rotatably connected with the lower support column 14. That is, the two groups of transmission components 20 are symmetrically or spaced to install the transmission housing 10.

[0045] Further, the transmission housing 10 is provided with a partition 13, and the upper transmission cavity 15 and the lower transmission cavity are arranged opposite to the partition 13. The partition 13 and the peripheral wall of the transmission housing 10 form an integral structure with high strength and stability. The lower support column 14 and the lower support column 14 are arranged opposite to the partition 13 to locate the insertion position and insertion depth of the electromagnetic mechanism 25. The upper support column 12 and the lower support column 14 are both provided with threading holes or threading notches for the wires to pass through.

[0046] The transmission mechanism disclosed in the above embodiment is applied to an opening and closing curtain, wherein the opening and closing curtain includes a track device, a power device and a transmission mechanism, wherein the track device includes a track assembly, a left curtain body assembly and a right curtain body assembly sliding on the track assembly. The left curtain body assembly is connected to one set of transmission assemblies 20, the right curtain body assembly is connected to another set of transmission assemblies 20, and the power device is connected to a transmission shaft 30 to drive the left curtain body assembly and / or the right curtain body assembly to move.

[0047] The left curtain body assembly and the right curtain body assembly are connected by a transmission belt, and slide along the track assembly. The power device drives the transmission shaft 30 to rotate, and the transmission assembly 20 realizes clutch control by controlling the on and off of the electromagnetic mechanism 25, so that the left curtain body assembly and the right curtain body assembly can be controlled to move independently or synchronously, with good control effect and delicate overall structure.

[0048] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0049] It should be understood that the present invention is not limited to the precise structure described above and shown in the 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. A transmission mechanism, characterized in that: Comprising a transmission housing (10), a transmission shaft (30), and two groups of transmission components (20) coaxially spaced from the transmission housing (10), each group of the transmission components (20) comprising an electromagnetic clutch mechanism and a transmission gear (21), the transmission gear (21) being provided with a recessed clutch cavity (213) and two ball grooves (211) distributed on the wall surface of the clutch cavity (213); The electromagnetic clutch mechanism comprises an electromagnetic mechanism (25), a clutch rotating frame (22), an iron sheet (24) and two magnetic beads (23); the clutch rotating frame (22) is drivingly connected to the transmission shaft (30); the two magnetic beads (23) are respectively located on both sides of the clutch rotating frame (22) and adsorbed on the iron sheet (24); the iron sheet (24) is adsorbed on a side of the clutch rotating frame (22) facing the electromagnetic mechanism (25); and a movable gap is provided between the iron sheet (24) and the electromagnetic mechanism (25); The electromagnetic mechanism (25) absorbs the iron sheet (24) when energized, so that the iron sheet (24) is separated from the clutch rotating frame (22).

2. The transmission mechanism according to claim 1, characterized in that: The clutch rotating frame (22) comprises a plate-shaped pushing portion (222) and a plug-in portion (224) protruding from the pushing portion (222) in a columnar shape, the plug-in portion (224) being movably plugged into the iron sheet (24), both sides of the pushing portion (222) being arranged as guide rail curved surfaces (221), and the magnetic beads (23) being distributed on both sides of the pushing portion (222) and moving along the guide rail curved surfaces (221).

3. The transmission mechanism according to claim 2, characterized in that: A magnetic component (27) is embedded in the side of the pushing portion (222) facing the iron sheet (24).

4. The transmission mechanism according to claim 2, characterized in that: The plug-in portion (224) abuts against the electromagnetic mechanism (25), and a protruding height of the plug-in portion (224) is greater than a thickness of the iron sheet (24).

5. The transmission mechanism according to claim 2, characterized in that: The clutch rotating frame (22) comprises a rotating portion (223) protruding from the pushing portion (222); the rotating portion (223) and the transmission gear (21) are plug-connected; and the transmission shaft (30) and the rotating portion (223) are plug-connected.

6. The transmission mechanism according to claim 5, characterized in that: The mating surfaces of the transmission shaft (30) and the rotating part (223) are provided with at least one torque surface.

7. The transmission mechanism according to claim 1, characterized in that: The electromagnetic mechanism (25) is embedded in and installed in the transmission housing (10), and a wire of the electromagnetic mechanism (25) passes through the transmission housing (10).

8. The transmission mechanism according to claim 7, characterized in that: The electromagnetic mechanism (25) is configured as an electromagnet mechanism.

9. The transmission mechanism according to claim 1, characterized in that: The transmission housing (10) comprises an upper transmission chamber (15), a lower transmission chamber and two groups of output ports (11) corresponding to the upper transmission chamber (15) and the lower transmission chamber. An upper support column (12) is formed by a protrusion in the upper transmission chamber (15). The electromagnetic clutch mechanism is embedded in the upper support column (12). The transmission gear (21) is rotatably connected to the upper support column (12) via a rotating bearing (26). Another group of the transmission components (20) is installed in the lower transmission chamber.

10. The transmission mechanism according to claim 9, characterized in that: The transmission housing (10) is provided with a partition (13), and the upper transmission chamber (15) and the lower transmission chamber are arranged with their backs facing the partition (13).

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