Brake mechanism and lifting device

Abstract

The utility model relates to a brake mechanism and a lifting device, the brake mechanism comprises a machine shell, at least one stage of planetary speed reduction set coaxially installed on the machine shell and a brake assembly, the brake assembly comprises an input piece, and the input piece is connected with a planet wheel of the last stage of planetary speed reduction set. An input piece in the brake assembly is connected with a planet wheel of the last-stage planetary speed reduction set, the brake assembly and the planetary speed reduction sets are combined to reduce parts and transmission connection parts, independent functions of the brake assembly and the planetary speed reduction sets can be achieved, the size of the device is greatly reduced, and the structure is simplified. The planetary speed reduction set can reduce the rotating speed, improve the transmission stability and reduce noise and vibration of the brake mechanism.

Description

Technical Field

[0001] This utility model relates to the field of electric curtain technology, and in particular to a braking mechanism and lifting device. Background Technology

[0002] Electric blinds are equipped with a power output mechanism, at the output end of which an actuator can be connected to perform corresponding functions, such as controlling the opening and closing of the blinds, controlling the raising and lowering of the curtain coils, and other motion controls.

[0003] Motors operate at high speeds, and to ensure accurate starting and stopping of the actuators, some power mechanisms are connected to braking mechanisms for braking control. For example, publication number CN222654968U provides a braking structure for a motor.

[0004] The braking mechanism is directly connected to the motor, enabling it to brake the motor and control the start and stop of power. However, in some applications, a reduction gear is installed between the braking mechanism and the motor, and the output of the reduction gear is then connected to the braking mechanism. This increases the axial length of the entire device and the required installation space, thus requiring improvement. Utility Model Content

[0005] To overcome the problems existing in related technologies, this utility model provides a braking mechanism to solve the technical problems of large device size and large installation space required.

[0006] According to a first aspect of the present invention, a braking mechanism is provided, the braking mechanism including a housing, at least one stage planetary reduction gear coaxially mounted on the housing, and a braking assembly, the braking assembly including an input component connected to the planetary gears of the final stage planetary reduction gear.

[0007] In one embodiment, the planetary reduction gear assembly includes internal tooth grooves formed within the housing.

[0008] In one embodiment, a positioning cavity communicating with the internal tooth groove is formed inside the housing, and the brake assembly is installed in the positioning cavity.

[0009] In one embodiment, the brake assembly includes a housing that engages with the positioning cavity.

[0010] In one embodiment, the input element extends into the housing, and a deceleration section is formed between the housing and the input element.

[0011] In one embodiment, the input component has a positioning hole on the side facing the planetary reduction gear, and a positioning rod is formed on the sun gear of the planetary reduction gear, the positioning rod extending into the positioning hole.

[0012] In one embodiment, the brake assembly includes a roller and an output member. The input member is provided with a deceleration chamber, a plurality of slots, and a plurality of protrusions partially protruding from the chamber wall. The output member is alternately provided with a deceleration plane and a moving slot. The output member is inserted into the deceleration chamber.

[0013] The protrusion extends into the corresponding moving groove, and the roller is located in the space between the groove opening, the deceleration plane and the outer shell to form a deceleration part.

[0014] In one embodiment, the housing is provided with a positioning notch, and the outer shell is provided with a snap-fit ​​protrusion that matches the positioning notch.

[0015] In one embodiment, the braking mechanism includes an input shaft connected to a sun gear, a tube formed on the housing, and one end of the input shaft opposite to the braking assembly extending into the tube.

[0016] According to a second aspect of the present invention, a lifting device is provided, including a braking mechanism as described above and a rope winder or belt winder connected to the output end of the braking assembly.

[0017] The technical solution provided by the embodiments of this utility model can include the following beneficial effects: the input component in the brake assembly is connected to the planetary gears of the final-stage planetary reduction gear set. The combination of the brake assembly and the planetary reduction gear set reduces the number of parts and transmission connection points, while achieving independent functions, greatly reducing the size of the device and simplifying the structure. The planetary reduction gear set can reduce the rotational speed and improve transmission stability, reducing the noise and vibration of the braking mechanism. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form 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.

[0019] Figure 1 This is a schematic diagram of the braking mechanism according to one embodiment.

[0020] Figure 2 This is a cross-sectional structural schematic diagram of a braking mechanism according to one embodiment.

[0021] Figure 3 This is an exploded structural diagram of a braking mechanism according to one embodiment.

[0022] Figure 4 This is a cross-sectional schematic diagram of a braking mechanism according to one embodiment.

[0023] Figure 5 This is a schematic diagram illustrating the connection between the input component and the planetary gears according to one embodiment.

[0024] In the figure, the components are: housing 10; internal tooth groove 11; positioning cavity 12; tube body 13; positioning notch 14; brake assembly 20; input component 21; positioning hole 211; slot 212; protrusion 213; deceleration cavity 214; outer shell 22; snap-fit ​​boss 221; output component 23; deceleration plane 231; moving groove 232; transmission hole 233; roller 24; planetary reduction gear 30; planetary gear 31; sun gear 32; positioning rod 321; and input shaft 40. Detailed Implementation

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] like Figures 1 to 3 As shown, this utility model provides a braking mechanism, which includes a housing 10, at least one stage planetary reduction gear 30 coaxially mounted on the housing 10, and a braking assembly 20. The planetary reduction gear 30 can be connected to a motor or a power input mechanism for power input reduction adjustment. The planetary reduction gear 30 is connected to the braking assembly 20, wherein the braking assembly 20 includes an input component 21, which is connected to the planetary gears 31 of the final stage planetary reduction gear 30. The input component 21 serves as the power input point for the braking assembly 20, and at the same time, the input component 21 is connected to the planetary gears 31, forming the output point of the final stage planetary reduction gear 30; that is, the input component 21 integrates the braking assembly 20 and the final stage planetary reduction gear 30, reducing the number of transmission connection points, while achieving independent functions for each component, greatly reducing the size of the device and simplifying the structure.

[0027] Preferably, the brake assembly 20 further includes an output member 23, which is used to connect to the actuator, thereby enabling the brake mechanism to brake the actuator.

[0028] In one embodiment, the planetary reduction gear 30 includes an internal gear groove 11 formed within the housing 10, and the planetary gears 31 of the planetary reduction gear 30 are meshed with the internal gear groove 11. The housing 10 forms part of the planetary reduction gear 30, and the planetary reduction gear 30 is assembled to the housing 10, reducing the number of components in the planetary reduction gear 30. The internal gear groove 11 and the housing 10 are integrally formed, resulting in high structural strength.

[0029] Furthermore, a positioning cavity 12 communicating with the internal gear groove 11 is formed inside the housing 10, and the brake assembly 20 is installed in the positioning cavity 12. The positioning cavity 12 and the internal gear groove 11 are located in the same communicating space inside the housing 10, making it convenient to assemble and connect the brake assembly 20 and the planetary reduction gear set.

[0030] The internal toothed groove 11 and the positioning cavity 12 are arranged side by side, with the positioning cavity 12 recessed from one end of the housing 10. The brake assembly 20 is inserted and assembled into the positioning cavity 12, and the joint between the two has an anti-rotation structure. For example, the anti-rotation structure is configured such that the plane of the positioning cavity 12 matches and fits against the plane of the brake assembly 20. Alternatively, the anti-rotation structure is configured as a complementary fit of grooves and ribs.

[0031] In one embodiment, the brake assembly 20 includes a housing 22, which engages with a positioning cavity 12. The housing 22 is inserted into the positioning cavity 12 and engaged and fixed with the housing 10, allowing for precise control of the assembly position and angle of the brake assembly 20. The housing 22 and the positioning cavity 12 can be complementarily engaged through grooves and ribs.

[0032] Preferably, the housing 10 is provided with a positioning notch 14, and the outer shell 22 is provided with a snap-fit ​​boss 221 that matches the positioning notch 14. The positioning notch 14 intersects with the opening of the positioning cavity 12, and the snap-fit ​​boss 221 protrudes radially from the outer shell 22. The snap-fit ​​boss 221 and the positioning notch 14 are complementary in positioning to form a snap-fit ​​between the outer shell 22 and the positioning cavity 12. The outer shell 22 has a tubular structure, and the snap-fit ​​boss 221 protrudes radially and partially from the outer peripheral wall of the outer shell 22 to form a lateral protrusion. Optionally, the snap-fit ​​boss 221 is provided as one, two, three, or four to cooperate with the outer shell 22 in snap-fitting and defining the brake assembly 20.

[0033] The outer casing 22 separates the moving parts of the brake assembly 20 from the housing 10. Meanwhile, the planetary gear 31 meshes with the internal gear groove 11 to form the brake assembly 20.

[0034] like Figures 2 to 5 As shown, the input component 21 extends into the housing 22, and a deceleration section is formed between the housing 22 and the input component 21. The housing 22 is inserted into the positioning cavity 12 and surrounds the input component 21, and the input component 21 can rotate relative to the housing 22.

[0035] The deceleration unit connects the input component 21 and the housing 22. The brake assembly 20 also includes an output component 23 and rollers 24. The input component 21 has a deceleration chamber 214, with multiple slots 212 on its wall and multiple protrusions 213 on the inner side of the chamber wall. The slots 212 and protrusions 213 are alternately arranged. The outer peripheral wall of the output component 23 alternately has deceleration planes 231 and moving grooves 232. Preferably, three deceleration planes 231 are provided, and a moving groove 232 is provided between two adjacent deceleration planes 231.

[0036] The output component 23 is inserted into the reduction chamber 214, and the protrusion 213 extends into the moving groove 232. The roller 24 is located in the space formed by the groove 212, the reduction plane 231, and the inner wall of the outer casing 22. The working principle of the brake assembly 20 can be found in CN222654968U, and will not be repeated here. The difference lies in that the input component 21, as part of the planetary reduction gear, constitutes the power input section, and the output component 23 is used to connect the actuator. The planetary reduction gear can first reduce speed, and then brake the actuator through the braking mechanism.

[0037] In one embodiment, the input component 21 has a positioning hole 211 on the side facing the planetary reducer assembly, and a positioning rod 321 is formed on the sun gear 32 of the planetary reducer assembly, extending into the positioning hole 211. The positioning hole 211 accommodates part of the positioning rod 321 to form a coaxial structure, improving the rotational smoothness of the sun gear 32. The positioning rod 321 and the input component 21 are fitted together for positioning and installation, which can define the circumferential and axial positions, reduce the axial space dimension, and reduce the assembly difficulty.

[0038] The positioning rod 321 and the sun gear 32 form an approximately stepped shaft structure. Furthermore, the sun gear 32 is provided with a rib on its side, which extends into the internal tooth groove 11 and is located between the planet gear 31 and the housing 10, so as to further limit the axial movement space of the sun gear 32.

[0039] In one embodiment, the braking mechanism includes an input shaft 40 connected to a sun gear 32. A tube 13 is formed on the housing 10, with one end of the input shaft 40, away from the brake assembly 20, extending into the tube 13. The tube 13 is a tubular protrusion on the housing 10, protruding outwards to increase the contact support area between the input shaft 40 and the housing 10, thereby improving the rotational stability of the input shaft 40.

[0040] Optionally, the input shaft 40 and the sun gear 32 are detachably connected, and the mounting position of the input shaft 40 and the power source connected to it are adjustable.

[0041] Optionally, the input shaft 40 and the sun gear 32 are an integral structure, that is, the sun gear 32 is the toothed part on the input shaft 40. The input shaft 40 is installed on the tube body 13 and extends into the meshing area of ​​the planet gear 31, so as to be able to mesh and connect the planet gear 31.

[0042] The braking mechanism described in the above embodiments is applied to a lifting device, wherein the lifting device includes a braking mechanism and a rope winder or belt winder connected to the output end of the braking assembly 20. The rope winder or belt winder serves as an actuator, enabling the lifting and lowering control of the electric curtains.

[0043] The actuator is connected to the output component 23. The planetary reduction gear can decelerate first, and then brake the actuator through the braking mechanism to improve the smoothness of the rope winder or belt winder.

[0044] Preferably, the output component 23 is provided with a transmission hole 233, and the actuator is plugged into the transmission hole 233 to form a plug-in transmission connection.

[0045] It should be understood that this application 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 its scope. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary technical means in the art that are not disclosed in this invention.

Claims

1. A braking mechanism, characterized in that, The braking mechanism includes a housing (10), at least one stage planetary reduction gear (30) coaxially mounted on the housing (10), and a braking assembly (20). The braking assembly (20) includes an input element (21) connected to the planetary gear (31) of the final stage planetary reduction gear (30).

2. The braking mechanism according to claim 1, characterized in that, The planetary reduction gear (30) includes an internal tooth groove (11) formed within the housing (10).

3. The braking mechanism according to claim 2, characterized in that, The housing (10) has a positioning cavity (12) that communicates with the internal tooth groove (11), and the brake assembly (20) is installed in the positioning cavity (12).

4. The braking mechanism according to claim 3, characterized in that, The brake assembly (20) includes a housing (22) that engages with the positioning cavity (12).

5. The braking mechanism according to claim 4, characterized in that, The input component (21) extends into the housing (22), and a deceleration section is formed between the housing (22) and the input component (21).

6. The braking mechanism according to claim 5, characterized in that, The input component (21) has a positioning hole (211) on the side facing the planetary reduction gear (30), and a positioning rod (321) is formed on the sun gear (32) of the planetary reduction gear (30), and the positioning rod (321) extends into the positioning hole (211).

7. The braking mechanism according to claim 5, characterized in that, The brake assembly (20) includes a roller (24) and an output component (23). The input component (21) is provided with a deceleration chamber (214), multiple slots (212) and multiple protrusions (213) that partially protrude from the chamber wall. The output component (23) is alternately provided with a deceleration plane (231) and a moving slot (232). The output component (23) is inserted into the deceleration chamber (214). The protrusion (213) extends into the corresponding moving groove (232), and the roller (24) is located in the space between the groove (212), the deceleration plane (231) and the outer shell (22) to form a deceleration part.

8. The braking mechanism according to claim 4, characterized in that, The housing (10) is provided with a positioning notch (14), and the outer shell (22) is provided with a snap-fit ​​boss (221) that matches the positioning notch (14).

9. The braking mechanism according to claim 1, characterized in that, The braking mechanism includes an input shaft (40) connected to a sun gear (32), a tube (13) is formed on the housing (10), and one end of the input shaft (40) away from the braking assembly (20) extends into the tube (13).

10. A lifting device, characterized in that, Includes the braking mechanism as described in any one of claims 1 to 9 and a rope winder or belt winder connected to the output end of the braking assembly (20).

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