Motor transmission mechanism

Abstract

The utility model discloses a motor transmission mechanism, which comprises a transmission assembly connected with a motor, and is characterized in that the transmission assembly comprises a first planetary gear set and a second planetary gear set which are in transmission connection, the first planetary gear set comprises a first inner gear sleeve, and the second planetary gear set comprises a second inner gear sleeve; the first inner gear sleeve and the second inner gear sleeve are detachably connected to form a transmission cavity. The first inner gear sleeve and the second inner gear sleeve are combined to form a shell, the first planet gear set and the second planet gear set can be detachably connected respectively, any part can be replaced independently, and the maintenance cost is reduced. The motor is in driving connection with the first planet wheel set, the first planet wheel set and the second planet wheel set form multi-stage speed reduction, and flexible adjustment of the output rotating speed is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric curtain technology, and more specifically to a motor transmission mechanism. Background Technology

[0002] The application of motorized curtains in buildings is becoming increasingly widespread, especially in high-ceilinged living rooms, lobbies, and office buildings. Motorized curtains are equipped with a motor drive mechanism, which uses a reduction gear to adjust the speed and controllable output torque. Existing reduction gears can employ a multi-stage planetary structure for speed reduction, where multiple planetary structures are sequentially arranged within the same housing, thus forming a stable speed reduction transmission.

[0003] However, the existing multi-stage planetary structures are assembled in the same housing, making it difficult to repair and replace individual planetary structures, which increases maintenance costs. In particular, if a problem occurs in the first-stage planetary structure, the entire motor transmission mechanism must be replaced or disassembled, resulting in technical problems that increase maintenance costs. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a motor transmission mechanism for convenient maintenance of the planetary structure in the motor transmission mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a motor transmission mechanism, including a transmission component connected to a motor, the transmission component including a first planetary gear set and a second planetary gear set connected in transmission, the first planetary gear set including a first internal gear sleeve, the second planetary gear set including a second internal gear sleeve, the first internal gear sleeve and the second internal gear sleeve being detachably connected to form a transmission cavity.

[0006] In one embodiment, the first inner toothed sleeve protrudes from its end to form an insertion rib, and the second inner toothed sleeve is recessed from its end to form an insertion groove.

[0007] In one embodiment, the first inner toothed sleeve includes at least one limiting protrusion protruding radially from the insertion protrusion, and the second inner toothed sleeve includes a limiting groove recessed from the inner wall of the insertion groove, wherein the insertion protrusion and the insertion groove are inserted into each other.

[0008] In one embodiment, the first inner toothed sleeve has a locking hole, and the second inner toothed sleeve has a clearance notch corresponding to the locking hole.

[0009] In one embodiment, the output end of the transmission assembly is connected to a clutch mechanism.

[0010] In one embodiment, a receiving cavity is formed inside the second inner gear sleeve, the receiving cavity is in communication with the transmission cavity, and the clutch mechanism is located inside the receiving cavity.

[0011] In one embodiment, the motor transmission mechanism further includes a clutch housing, a clutch mechanism is mounted on the clutch housing, and the clutch housing is detachably connected to the second inner gear sleeve.

[0012] In one embodiment, the clutch mechanism includes an output component, an iron component, a clutch component, and two magnetic beads. The output end of the transmission component is fixedly connected to the clutch component. A clutch cavity is formed inside the output component. The two magnetic beads are located inside the clutch cavity and are respectively located on both sides of the clutch component. The inner wall of the clutch cavity is provided with a groove adapted to the magnetic beads.

[0013] In one embodiment, the output component has a connection hole, and the output end of the transmission assembly extends into the connection hole.

[0014] In one embodiment, a positioning hole is provided on the first inner gear sleeve, and a threaded hole corresponding to the positioning hole is formed on the motor.

[0015] The beneficial effects of this utility model are as follows: In this utility model, the first internal gear sleeve and the second internal gear sleeve are combined to form a housing. The first planetary gear set and the second planetary gear set can be disassembled and connected separately, and any part can be replaced independently, reducing maintenance costs. The motor and the first planetary gear set are driven together, and the first planetary gear set and the second planetary gear set constitute a multi-stage reduction, realizing flexible adjustment of the output speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the motor transmission mechanism in this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the motor transmission mechanism of this utility model;

[0018] Figure 3 This is an exploded view of the motor transmission mechanism in this utility model;

[0019] Figure 4 This is a schematic diagram of the first inner toothed sleeve in this utility model;

[0020] Figure 5 This is a schematic diagram of the transmission connection between the first planetary gear set and the second planetary gear set in this utility model;

[0021] Figure 6 This is a cross-sectional view of the second planetary gear set in this utility model;

[0022] Figure 7 This is an exploded view of the clutch assembly in this utility model.

[0023] Reference numerals: First planetary gear set 10; First internal gear sleeve 11; First tooth groove 111; Insertion rib 112; Limiting protrusion 113; Locking hole 114; Positioning hole 115; First planetary gear 12; First planetary carrier 13; First gear 14; Input gear 15; Second planetary gear set 20; Second internal gear sleeve 21; Second tooth groove 211; Insertion groove 212; Limiting groove 213; Clearance notch 214; Second planetary gear 22; Second planetary carrier 23; Transmission component 24; Motor 30; Clutch assembly 40; Iron part 41; Output component 42; Output shaft 421; Groove 422; Connecting hole 423; Clutch component 43; Magnetic bead 44; Rotary bearing 50; Locking screw 60. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] Reference Figures 1 to 5 As shown in this embodiment, a motor transmission mechanism includes a transmission component connected to a motor 30. The motor 30 is a power element, and preferably, the motor 30 is a brushless motor.

[0026] The transmission assembly is used to adjust the output parameters of the motor 30, especially the output torque and speed.

[0027] The transmission assembly includes a first planetary gear set 10 and a second planetary gear set 20 connected by transmission. The first planetary gear set 10 includes a first internal gear sleeve 11, and the second planetary gear set 20 includes a second internal gear sleeve 21. The first internal gear sleeve 11 and the second internal gear sleeve 21 are detachably connected and form a transmission cavity. The first planetary gear set 10 includes the first internal gear sleeve 11, which has internal tooth grooves. The planet gears of the first planetary gear set 10 are meshed with the internal tooth grooves. Similarly, the second planetary gear set 20 includes the second internal gear sleeve 21, which has internal tooth grooves. The planet gears of the second planetary gear set 20 are meshed with the internal tooth grooves.

[0028] The first planetary gear set 10 is connected to the motor 30, wherein the motor 30 is connected to the sun gear of the first planetary gear set 10, and the output part of the first planetary gear set 10 is connected to the sun gear of the second planetary gear set 20; or, the output part of the first planetary gear set 10 is configured with a toothed structure to form the sun gear of the second planetary gear set 20. The first planetary gear set 10 and the second planetary gear set 20 are a two-stage reduction transmission, which can reduce the speed and increase the torque.

[0029] The first inner gear sleeve 11 and the second inner gear sleeve 21 are detachably connected to form the housing part, and the internal space of the first inner gear sleeve 11 and the second inner gear sleeve 21 forms the transmission cavity. By assembling and disassembling the first inner gear sleeve 11 and the second inner gear sleeve 21, the first planetary gear set 10 and the second planetary gear set 20 can be independently disassembled and assembled, which facilitates production and maintenance and improves the disassembly and assembly flexibility of various parts of the motor transmission mechanism.

[0030] In one embodiment, a positioning hole 115 is formed on the first inner gear sleeve 11, and a threaded hole corresponding to the positioning hole 115 is formed on the motor 30. A fastener passes through the positioning hole 115 and connects to the threaded hole, thereby connecting the first inner gear sleeve 11 and the motor 30, shortening the length between the motor 30 and the transmission assembly, and improving structural compactness. After the first inner gear sleeve 11 and the second inner gear sleeve 21 are assembled, the connecting end of the fastener is located inside the transmission assembly, improving the overall aesthetics.

[0031] The first inner gear sleeve 11 and the second inner gear sleeve 21 can be detachably connected in the following ways: the first inner gear sleeve 11 and the second inner gear sleeve 21 are provided with a flange structure and locked by fasteners; or, the first inner gear sleeve 11 and the second inner gear sleeve 21 are plugged into each other; or, the first inner gear sleeve 11 and the second inner gear sleeve 21 are fixedly connected by a snap-fit ​​structure.

[0032] Reference Figures 2 to 3 As shown, in one embodiment, the first inner toothed sleeve 11 and the second inner toothed sleeve 21 are connected by insertion to form a quick-release and insertion positioning. The end face of one of the first inner toothed sleeve 11 and the second inner toothed sleeve 21 protrudes to form an insertion rib 112, and the end face of the other is correspondingly recessed to form an insertion groove, so as to form a complementary insertion structure.

[0033] In one specific embodiment, the first inner gear sleeve 11 has a protruding insertion rib 112 at its end, and the second inner gear sleeve 21 has a recessed insertion groove 212 at its end. The insertion rib 112 and the insertion groove 212 are engaged to assemble the first inner gear sleeve 11 and the second inner gear sleeve 21 into a single unit, forming a transmission cavity. When the insertion rib 112 and the insertion groove 212 are in place, the first planetary gear set 10 and the second planetary gear set 20 are connected in a transmission manner.

[0034] In an optional embodiment, the first inner toothed sleeve 11 and the second inner toothed sleeve 21 are tightly fitted together to improve the accuracy of the insertion fit.

[0035] Preferably, the first inner toothed sleeve 11 and the second inner toothed sleeve 21 are inserted into each other, and the insertion parts of the two have an anti-rotation structure. The insertion parts of the insertion rib 112 and the insertion groove 212 are provided with complementary matching limiting protrusions 113 and limiting grooves 213.

[0036] Specifically, the first inner toothed sleeve 11 includes at least one limiting protrusion 113 that protrudes radially from the insertion rib 112, and the second inner toothed sleeve 21 includes a limiting groove 213 that is recessed from the inner wall of the insertion groove 212. The insertion rib 112 and the insertion groove 212 are inserted into each other, and the limiting protrusion 113 is inserted into the limiting groove 213 to form a complementary fit. This can limit circumferential rotation, improve the insertion positioning accuracy, and make the insertion direction controllable.

[0037] The motor drive mechanism is mounted on the housing, and at least one of the first inner gear sleeve 11 and the second inner gear sleeve 21 is locked to the housing by fasteners to form a fixed installation. Preferably, the housing is provided with a mounting groove, and the second inner gear sleeve 21 is mounted in the mounting groove.

[0038] Reference Figures 2 to 4 As shown, the first inner gear sleeve 11 has a locking hole 114, and the second inner gear sleeve 21 has a clearance notch 214 corresponding to the locking hole 114. The locking screw 60 passes through the mounting hole on the housing and through the clearance notch 214 before locking into the locking hole 114, thereby locking the first inner gear sleeve 11 and the housing together. The first inner gear sleeve 11 limits the position of the second inner gear sleeve 21 in the mounting groove, thereby fixing the mounting position of the motor drive mechanism and the housing.

[0039] The clearance notch 214 is a notch provided at the end of the second inner toothed sleeve 21 to reduce the difficulty of aligning the locking screw 60 with the locking hole 114 and improve the ease of assembly.

[0040] Reference Figures 2 to 6 As shown, in one embodiment, the first planetary gear set 10 and the first internal gear sleeve 11 constitute a planetary reduction mechanism. Preferably, the first internal gear sleeve 11 is provided with a first tooth groove 111, and the groove wall of the first tooth groove 111 is configured as helical teeth. The first planetary gear set 10 includes a first planet carrier 13, at least one first planetary gear 12 mounted on the first planet carrier 13, and a first gear 14. The first tooth groove 111 adopts helical teeth, and correspondingly, the first planetary gear 12 adopts a helical tooth structure to reduce noise and improve transmission efficiency.

[0041] The motor 30 is connected to the input gear 15, which is the sun gear of the first planetary gear set 10. The input gear 15 meshes with the first planetary gears 12. The first planetary gears 12 mesh with the input gear 15 and the first toothed tooth 111 respectively to drive the first planetary carrier 13 to rotate. Preferably, three first planetary gears 12 are provided, and the three first planetary gears 12 mesh with the input gear 15.

[0042] The first gear 14 and the first planetary carrier 13 rotate synchronously, wherein the first planetary gear set 10 is connected to the second planetary gear set 20 through the first gear 14.

[0043] In one embodiment, the second inner tooth sleeve 21 is provided with a second tooth groove 211, and the groove wall of the second tooth groove 211 is configured as straight teeth.

[0044] The second planetary gear set 20 includes a second planetary carrier 23, at least one second planetary gear 22 mounted on the second planetary carrier 23, and a transmission component 24. The second planetary gear 22 meshes with the first gear 14 and the second tooth groove 211, respectively. Preferably, three second planetary gears 22 are provided, and the three second planetary gears 22 mesh with the first gear 14.

[0045] Both the first gear 14 and the second planetary gear 22 adopt a spur gear structure. The first gear 14 forms the sun gear located in the central area formed by the three second planetary gears 22.

[0046] Reference Figure 2 , Figure 3 and Figure 7 As shown, in one embodiment, the output end of the transmission component is connected to a clutch mechanism, which controls the on / off control of the output power of the motor transmission mechanism, thereby controlling the power of the actuator.

[0047] In an optional embodiment, the clutch mechanism is disposed within the second inner gear sleeve 21, and the clutch mechanism is assembled and connected to the second inner gear sleeve 21. The second inner gear sleeve 21 has a receiving cavity that communicates with the transmission cavity, and the clutch mechanism is located within the receiving cavity. The clutch assembly 40 is used to control the engagement and disengagement of the power output of the motor transmission mechanism, thereby realizing the motion control of the actuator.

[0048] Specifically, the transmission component 24 of the second planetary gear set 20 is inserted into the receiving cavity and connected to the clutch mechanism, which controls the engagement and disengagement of the power input to the transmission component 24.

[0049] Furthermore, a partition is provided between the receiving cavity and the transmission cavity to separate the spaces of the two cavities. A through hole is provided on the partition, through which the transmission component 24 passes and connects to the clutch mechanism.

[0050] The first planetary gear set 10 and the second planetary gear set 20 constitute a two-stage reduction mechanism and are connected to the clutch assembly 40. This can shorten the overall size and provide stable torque output.

[0051] In another embodiment, the motor drive mechanism further includes a clutch housing, on which the clutch mechanism is mounted, and the clutch housing is detachably connected to the second inner gear sleeve 21. The clutch housing has a cavity structure for accommodating and mounting the clutch mechanism. The clutch mechanism and the clutch housing constitute independent components and are detachably connected to the second inner gear sleeve 21, and the clutch mechanism is drive-connected to the second planetary gear set 20. Optionally, the clutch housing and the second inner gear sleeve 21 are connected by fasteners.

[0052] In the above embodiment, the clutch assembly 40 includes an iron part 41, a clutch member 43, an output member 42, and two magnetic beads 44. The output end of the transmission assembly is fixedly connected to the clutch member 43. A clutch cavity is formed in the output member 42, and the two magnetic beads 44 are located in the clutch cavity and are respectively located on both sides of the clutch member 43. The inner wall of the clutch cavity is provided with a groove 422 that is adapted to the magnetic beads 44.

[0053] The clutch element 43 has an approximately elliptical structure, and a space is formed between the clutch element 43 and the cavity wall of the clutch chamber to accommodate the movement of the magnetic bead 44. After the clutch element 43 moves the magnetic bead 44 into the groove 422, the output element 42 outputs power. When the magnetic bead 44 disengages from the groove 422, the power to the output element 42 and the second planetary gear set 20 is disconnected.

[0054] The output component 42 protrudes partially to form an output shaft 421 with a shaft-like protrusion. The output shaft 421 passes through the second inner gear sleeve 21 to form the power output part of the motor transmission mechanism.

[0055] Optionally, the end of the output shaft 421 is a solid shaft, which can output power directly or through an adapter structure.

[0056] Optionally, the end of the output shaft 421 is a concave shaft, which can be used with an actuator.

[0057] Furthermore, the output component 42 has a connection hole 423, and the output end of the transmission component extends into the connection hole 423. The clutch component 43 is fixed to the output end of the transmission component, and the output end of the transmission component is coaxially arranged with the output component 42, which improves the tightness of the connection between the transmission component and the clutch component 40, and improves the compactness in space.

[0058] In one embodiment, the clutch assembly 40 includes a rotary bearing 50 mounted on the second inner gear sleeve 21, and the output member 42 includes an output shaft 421 connected to the rotary bearing 50 and extending out of the second inner gear sleeve 21 at its end. The rotary bearing 50 is located at the opening of the second inner gear sleeve 21 to provide support for the output shaft 421 and improve rotational smoothness.

[0059] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. An electric motor drive mechanism comprising a drive assembly connected to an electric motor (30), characterised in that: The transmission assembly includes a first planetary gear set (10) and a second planetary gear set (20) that are connected in transmission. The first planetary gear set (10) includes a first internal gear sleeve (11), and the second planetary gear set (20) includes a second internal gear sleeve (21). The first internal gear sleeve (11) and the second internal gear sleeve (21) are detachably connected to form a transmission cavity.

2. The motor transmission mechanism according to claim 1, characterized in that: The first inner toothed sleeve (11) has a protruding insertion rib (112) at its end, and the second inner toothed sleeve (21) has a recessed insertion groove (212) at its end.

3. The motor transmission mechanism according to claim 2, characterized in that: The first inner toothed sleeve (11) includes at least one limiting protrusion (113) protruding radially from the insertion protrusion (112), and the second inner toothed sleeve (21) includes a limiting groove (213) recessed from the inner wall of the insertion groove (212), wherein the insertion protrusion (112) and the insertion groove (212) are inserted into each other.

4. The motor transmission mechanism according to claim 2, characterized in that: The first inner toothed sleeve (11) has a locking hole (114), and the second inner toothed sleeve (21) has a clearance notch (214) corresponding to the locking hole (114).

5. The motor transmission mechanism according to claim 1, characterized in that: The output end of the transmission component is connected to a clutch mechanism.

6. The motor drive mechanism according to claim 5, characterized in that: The second inner toothed sleeve (21) has a receiving cavity, which is connected to the transmission cavity, and the clutch mechanism is located in the receiving cavity.

7. The motor drive mechanism according to claim 5, characterized in that: The motor transmission mechanism also includes a clutch housing, the clutch mechanism is installed in the clutch housing, and the clutch housing is detachably connected to the second inner gear sleeve (21).

8. The motor drive mechanism according to claim 6 or 7, characterized in that: The clutch mechanism includes an output component (42), an iron component (41), a clutch component (43), and two magnetic beads (44). The output end of the transmission assembly is fixedly connected to the clutch component (43). A clutch cavity is formed in the output component (42). The two magnetic beads (44) are located in the clutch cavity and are respectively located on both sides of the clutch component (43). The inner wall of the clutch cavity is provided with a groove (422) that is adapted to the magnetic beads (44).

9. The motor transmission mechanism according to claim 8, characterized in that: The output component (42) has a connection hole (423), and the output end of the transmission component extends into the connection hole (423).

10. The motor transmission mechanism according to claim 1, characterized in that: The first inner gear sleeve (11) has a positioning hole (115), and the motor (30) has a threaded hole corresponding to the positioning hole (115).

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