Roller motor self-locking device and roller motor

Abstract

The invention provides a roller motor self-locking device and a roller motor, and relates to the technical field of motors. A self-locking mechanism and a tensioning mechanism are arranged in the roller motor, and when the roller motor is in a working state, a power transmission path from the driving mechanism to the input piece, the balls, the output piece and the tensioning mechanism can be formed; and when the roller motor is in a shutdown state and the load drives the transmission mechanism and the transmission part to rotate due to gravity, the output piece can correspondingly rotate, but based on the structure of the self-locking cavity, the ball can only be attached to the self-locking cavity to rotate and cannot drive the input piece to rotate, and therefore self-locking of the roller motor is achieved. Compared with the prior art, the self-locking device is located in the roller motor, the overall size and weight of the roller motor are effectively reduced, response is rapid during self-locking, and no delay occurs.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a self-locking device for a drum motor and a drum motor. Background Technology

[0002] Roller motors are commonly used equipment in the logistics and conveying industry (for example, they can be used as drive devices for downhill conveyors or vertical elevators). However, when a roller motor loses power, it is necessary to prevent the load from reversing due to gravity and causing safety accidents. Traditional roller motors rely on external brakes (such as electromagnetic brakes) to achieve stopping and locking. However, electromagnetic brakes require 0.3-0.5 seconds from power failure to complete locking, resulting in a response delay and making them prone to slippage under heavy load conditions. At the same time, external brakes increase the size and weight of the equipment. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a self-locking device for a drum motor and a drum motor, so as to solve the problems of response delay and large size and weight of the existing drum motor locking method that achieves motor locking through an external electromagnetic brake.

[0004] To achieve the above objectives, a first aspect of the present invention provides a self-locking device for a roller motor, disposed within the inner cavity of the roller motor, wherein the self-locking device for the roller motor comprises: The self-locking mechanism includes an input component and an output component, with a self-locking cavity formed between the input component and the output component. The inner contour of the self-locking cavity is formed into a trapezoidal shape. A ball bearing is disposed in the self-locking cavity to allow the input component and the output component to be movably connected. The input component is correspondingly connected to the drive mechanism of the roller motor. The tensioning mechanism is connected to the output component; the tensioning mechanism has a transmission part that is connected to the transmission mechanism of the drum motor. When the roller motor is in operation, the drive mechanism drives the input component to rotate, and the input component drives the output component to rotate through the balls, so as to transmit power to the transmission part of the tensioning mechanism; When the roller motor is in a stopped state and the transmission mechanism drives the transmission part to rotate, the output component can rotate accordingly and drive the ball to rotate in contact with the self-locking cavity, while the input component is in a stationary state so that the roller motor self-locks.

[0005] Preferably, the self-locking mechanism includes a fixed shell, the interior of which is formed a receiving cavity that extends through the axial end face of the fixed shell; the input component and the output component are located in the receiving cavity and are arranged sequentially along the axial direction of the fixed shell; the fixed shell, the input component, and the output component correspondingly form the self-locking cavity.

[0006] Preferably, the self-locking mechanism has multiple self-locking cavities, which are evenly distributed circumferentially along the receiving cavity; each self-locking cavity is provided with a ball bearing. In the cross-section of the self-locking mechanism, the inner contour of the self-locking cavity is composed of sequentially connected arc segments, a first inclined segment, a second inclined segment, and a third inclined segment; the output component has the first inclined segment, and the input component has the third inclined segment; the distance between the connection point of the first inclined segment and the second inclined segment and the center of the cross-section is L1, and the distance between the connection point of the third inclined segment and the second inclined segment and the center of the cross-section is L2, where L1 < L2.

[0007] Preferably, the input component includes a first disc and a plurality of first protrusions. The input component is sleeved on the outer side of the first drive shaft of the drive mechanism via the first disc. The plurality of first protrusions are located on the first end face of the first disc away from the drive mechanism, and the plurality of first protrusions are evenly distributed at circumferential intervals along the first disc. The output component includes a second disc and a second protrusion. The second disc is rotatably connected to the fixed housing via a first bearing. The second protrusion is located on the second end face of the second disc near the drive mechanism. The first protrusion and the second protrusion are correspondingly fitted together and form the self-locking cavity with the corresponding fixed shell.

[0008] Preferably, the second protrusion includes a support block formed in a ring shape and a plurality of stop blocks located on the outer side of the support block; the plurality of stop blocks are evenly spaced along the circumferential direction of the support block; and the first protrusion is disposed between any two stop blocks. In the cross-section of the self-locking mechanism, the stop block has a first inclined section, the support block has a second inclined section, and the first protrusion has a third inclined section.

[0009] Preferably, in the cross-section of the self-locking mechanism, the portion of the support block located between any two stop blocks is composed of a first arc segment, a second arc segment, and a third arc segment connected in sequence; Along the radial direction of the self-locking mechanism, the radial thickness of the second arc segment is constant, and the first protrusion is correspondingly disposed on the outer side of the second arc segment; from the stop block to the first protrusion, the radial thickness of the first arc segment and the third arc segment gradually increases.

[0010] Preferably, in the cross-section of the self-locking mechanism, both the first protrusion and the stop block are formed into a trapezoidal shape.

[0011] Preferably, a gap is formed between the first disc and the second disc and the inner wall of the receiving cavity.

[0012] Preferably, the tensioning mechanism includes a bracket assembly correspondingly connected to the output component and a tensioning member correspondingly sleeved on the outer side of the bracket assembly. The outer wall of the tensioning member forms a friction surface that abuts against the inner cavity wall of the roller motor, and the friction surface forms the transmission part.

[0013] According to a second aspect of the present invention, a roller motor is provided, wherein the roller motor includes a roller motor self-locking device, a drive mechanism and a transmission mechanism as described above, the drive mechanism including a brushless motor and a gearbox; the transmission mechanism including a drive shaft correspondingly connected to the inner cavity of the roller motor.

[0014] According to the self-locking device and roller motor of the present invention, a self-locking mechanism and a tensioning mechanism are provided inside the roller motor. The self-locking mechanism is connected to the drive mechanism of the roller motor through an input component and to the tensioning mechanism through an output component. Furthermore, a self-locking cavity is formed between the input component and the output component, and the inner contour of the self-locking cavity is formed into a trapezoidal shape. In addition, a ball bearing is provided in the self-locking cavity to enable the input component and the output component to be movably connected. Thus, when the roller motor is in operation, a power transmission path is formed from the drive mechanism to the input component, ball bearings, output component, and tensioning mechanism. When the roller motor is stopped and the load drives the transmission mechanism and transmission unit to rotate due to gravity, the output component will rotate accordingly. However, due to the structure of the self-locking cavity, the ball bearings can only rotate within the self-locking cavity and cannot drive the input component to rotate, thereby enabling the roller motor to self-lock. Compared to existing methods, this self-locking device is located inside the roller motor, effectively reducing the overall size and weight of the roller motor, and the self-locking response is rapid with no delay.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial schematic diagram of the shaft cross-section of a drum motor according to an embodiment of the present invention; Figure 2This is a partial schematic diagram of a self-locking mechanism according to an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of a self-locking mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of an input device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the output component according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a cross-section of the output component according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a tensioning mechanism according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the first part of the tensioning mechanism according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the second part of the tensioning mechanism according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the third part of the tensioning mechanism according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the fourth part of the tensioning mechanism according to an embodiment of the present invention.

[0018] Icons: 1-Main housing; 11-Brushless motor; 12-Gearbox; 121-First drive shaft; 122-Second bearing; 21-Fixed housing; 22-Input component; 221-First disc; 222-First protrusion; 23-Output component; 231-Second disc; 232-Support block; 2321-First arc segment; 2322-Second arc segment; 2323-Third arc segment; 233-Stop block; 234-First drive shaft; 235-First bearing; 24-Ball bearing; 25-Self-locking cavity; 251-Arc segment; 252-First inclined segment; 253-Second inclined segment; 254-Third inclined segment; 31-Bottom bracket; 32-Tensioning rubber; 33-Tensioning bracket; 331-First gear tooth; 34-Cage; 341-Second gear tooth; 35-Tensioning component. Detailed Implementation

[0019] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] According to a first aspect of the present invention, a self-locking device for a roller motor is provided, which is disposed within the inner cavity of the roller motor. In this embodiment, as... Figures 1 to 11 As shown, the self-locking device includes a self-locking mechanism and a tensioning mechanism. The self-locking mechanism is connected to the drive mechanism of the motor, and the tensioning mechanism is connected to the transmission mechanism of the motor. This forms a power transmission path from the drive mechanism to the self-locking mechanism, the tensioning mechanism, and the transmission mechanism, thereby achieving the driving effect of the drum motor. When the drum motor stops and its load drives the transmission mechanism to rotate due to gravity, the self-locking mechanism can generate a large self-locking force to ensure the safe use of the drum motor. The specific structure and assembly method of each of the above-mentioned mechanisms of the drum motor self-locking device according to the present invention will be described in detail below.

[0029] In this embodiment, as Figures 1 to 7As shown, the self-locking mechanism includes a fixed housing 21, an input component 22, and an output component 23. The fixed housing 21 has an internal cavity that extends through its axial end face. The input component 22 and the output component 23 are located within the cavity and are sequentially arranged along the axial direction of the fixed housing 21. The fixed housing 21 is located within the inner cavity of the roller motor and has a gap with the inner wall of the roller motor. Further, the fixed housing 21, the input component 22, and the output component 23 correspondingly form a self-locking cavity 25. Preferably, there are multiple self-locking cavities 25, evenly distributed circumferentially around the cavity. Each self-locking cavity 25 contains a ball bearing 24. The ball bearings 24 enable the movable connection between the input component 22 and the output component 23. Combined with the structure of the self-locking cavity 25, this allows the input component 22 to drive the output component 23 in one direction (i.e., the output component 23 cannot drive the input component 22 to rotate).

[0030] Specifically, such as Figure 3 As shown, the inner contour of the self-locking cavity 25 is formed into a trapezoidal shape. That is, in the cross-section of the self-locking mechanism, the self-locking cavity 25 is formed into a trapezoidal structure. The inner contour of the self-locking cavity 25 is composed of a series of arc segments 251, a first inclined segment 252, a second inclined segment 253, and a third inclined segment 254 connected end to end. The output member 23 is formed with the first inclined segment 252, the input member 22 is formed with the third inclined segment 254, and the second inclined segment 253 is formed by the input member 22 and / or the output member 23. In addition, the distance between the connection point of the first inclined segment 252 and the second inclined segment 253 and the center of the cross-section is set as L1, and the distance between the connection point of the third inclined segment 254 and the second inclined segment 253 and the center of the cross-section is set as L2, where L1 < L2.

[0031] Thus, the second tilting segment 253 is defined between the input member 22 and the output member 23, with the tilting direction from the input member 22 to the output member 23. So when the input member 22 rotates (whether the input member 22 rotates clockwise or counterclockwise), with the tilting assistance of the second tilting segment 253, the input member 22 can easily drive the ball 24 to move to the first inner angle formed by the first tilting segment 252 and the second tilting segment 253 (equivalent to the ball 24 being "downhill"). Then, when the input member 22 rotates further, it can smoothly drive the output member 23 to rotate.

[0032] Based on the tilt direction of the second inclined section 253 as described above, when the load drives the output component 23 to rotate due to its own weight, if the load weight is small, the ball 24 is not easily pushed to contact the input component 22 under the obstruction of the tilt of the second inclined section 253 (equivalent to the ball 24 "climbing a slope"), and can only rotate at the first inner angle to achieve the initial self-locking of the drum motor; if the load weight is large, the ball 24 will also be pushed by the output component 23 to the second inner angle formed by the third inclined section 254 and the second inclined section 253, or the third inner angle formed by the third inclined section 254 and the arc section 251, and will be clamped by the output component 23 and the input component 22. During the process of pushing the ball 24 to move, the second inclined section 253 can realize the release of force on the ball 24, so that the output component 23 cannot drive the input component 22 to rotate through the ball 24, so as to achieve further self-locking of the drum motor.

[0033] More specifically, in this embodiment, as Figures 2 to 6 As shown, the input component 22 includes a first disc body 221 and a plurality of first protrusions 222. The input component 22 is correspondingly sleeved on the outer side of the first drive shaft 121 of the drive mechanism via the first disc body 221. The plurality of first protrusions 222 are located on the first end face of the first disc body 221 away from the drive mechanism, and the plurality of first protrusions 222 are evenly distributed at circumferential intervals along the first disc body 221. Furthermore, as... Figures 1 to 6 As shown, the output component 23 includes a second disc 231 and a second protrusion. The second disc 231 is rotatably connected to the fixed shell 21 via a first bearing 235. The second protrusion is located on the second end face of the second disc 231 near the drive mechanism. The first protrusion 222 is correspondingly fitted with the second protrusion and forms the self-locking cavity 25 with the fixed shell 21.

[0034] like Figures 5 to 6As shown, the second protrusion includes a support block 232 formed in a ring shape and a plurality of stop blocks 233 located on the outer side of the support block 232; the plurality of stop blocks 233 are evenly spaced along the circumferential direction of the support block 232; a first protrusion 222 is provided between any two stop blocks 233; in the cross-section of the self-locking mechanism, the stop block 233 forms a first inclined section 252, the support block 232 forms a second inclined section 253, and the first protrusion 222 forms a third inclined section 254; specifically, the support block 232 is located between any two stop blocks 233. The portion between them is composed of a first arc segment 2321, a second arc segment 2322, and a third arc segment 2323 connected in sequence; along the radial direction of the self-locking mechanism, the radial thickness of the second arc segment 2322 is constant, and the first protrusion 222 is correspondingly disposed on the outer side of the second arc segment 2322; while from the stop block 233 to the first protrusion 222, the radial thickness of the first arc segment 2321 and the third arc segment 2323 gradually increases, and the outer sides of the first arc segment 2321 and the second arc segment 2322 respectively form a second inclined segment 253 corresponding to the self-locking cavity 25.

[0035] In this embodiment, the staggered arrangement of the stop block 233 and the first protrusion 222, and the symmetrical arrangement of the first arc segment 2321 and the third arc segment 2323 of the support block 232, ensure that the input component 22 can quickly input power regardless of whether it rotates forward or backward, while the output component 23 cannot drive the input component 22 regardless of whether it rotates forward or backward. This effectively guarantees the self-locking effect of the roller motor under various working conditions. In addition, in the cross-section of the self-locking mechanism, both the first protrusion 222 and the stop block 233 are formed into a trapezoidal shape. The end face of the first protrusion 222 facing the stop block 233 has a third inclined segment 254, while the end face of the stop block 233 facing the first protrusion 222 has a first inclined segment 252. Along the radial direction of the self-locking mechanism, from the outer end to the inner end of the self-locking mechanism, both the first protrusion 222 and the stop block 233 gradually taper inward, which facilitates the self-locking mechanism to achieve the above-mentioned technical effects.

[0036] In this embodiment, as Figure 1As shown, the first drive shaft 121 of the drive mechanism extends from one end of the fixed housing 21 into the receiving cavity, and the first disc 221 of the input member 22 is sleeved on the outer side of the first drive shaft 121. Further, the output member 23 has a clearance hole, meaning the first drive shaft 121 extends into the clearance hole and forms a gap with it. The other end of the output member 23 has a first transmission shaft 234, which extends from the other end of the fixed housing 21 to the outside of the receiving cavity. A first bearing 235 is sleeved on the outer side of the first transmission shaft 234 and correspondingly connected to the inner wall of the fixed housing 21. In addition, a second bearing 122 is also sleeved on the outer side of the first drive shaft 121, and this second bearing 122 is correspondingly connected to both the fixed housing 21 and the outer shell of the drive mechanism. Meanwhile, a gap is formed between the first disc 221 and the second disc 231 and the inner wall of the fixed housing 21.

[0037] In this way, the fixed shell 21 can be fixedly connected to the shell of the drive mechanism to increase the stability of the self-locking device and the drive mechanism assembly, and at the same time, it can facilitate the self-locking mechanism to achieve the above-mentioned technical effects.

[0038] In this embodiment, as Figure 1 and Figures 7 to 11 As shown, the tensioning mechanism includes a bracket assembly corresponding to the first drive shaft 234 of the output component 23 and a tensioning member 35 correspondingly sleeved on the outer side of the bracket assembly. The outer side wall of the tensioning member 35 forms a friction surface that abuts against the inner cavity side wall of the roller motor. The friction surface is formed as a transmission part that can drive the transmission mechanism of the roller motor to rotate.

[0039] Specifically, such as Figure 1 As shown, the support assembly includes a bottom support 31 that is threadedly fixed to the outer side of the first drive shaft 234. This bottom support has multiple triangular prism-shaped limiting blocks. A tensioning rubber 32 is correspondingly fitted onto the outer side of the bottom support 31. Based on the structure and arrangement of the multiple limiting blocks, circumferential and radial limiting of the tensioning rubber 32 is achieved. Furthermore, the support assembly also includes a tensioning bracket 33, which is correspondingly fitted onto the outer side of the tensioning rubber 32 and has a first gear tooth 331.

[0040] Furthermore, the support assembly also includes a retainer 34, such as Figures 8 to 11 As shown, it has a second gear tooth portion 341 that corresponds to and engages with the first gear tooth portion 331; each tooth in the second gear tooth portion 341 is formed as a polygonal tubular structure with multiple steps. The tensioning member 35 is correspondingly sleeved on the outer side of the first gear tooth portion 331 and the second gear tooth portion 341. Based on the first gear tooth portion 331 and the second gear tooth portion 341, it is convenient to achieve circumferential and radial limiting of the tensioning member 35. Furthermore, the retainer 34 and the tensioning bracket 33 are also connected by a bolt assembly to improve the overall stability of the tensioning mechanism.

[0041] In this embodiment, the drive mechanism ultimately transmits power through the outer wall of the tensioner 35. That is, the outer wall of the tensioner 35 (i.e. its transmission part) drives the main housing 1 of the roller motor to rotate through friction. However, there is no limitation on the specific form of the transmission part. For example, the transmission part can maintain its roughness through metal electric hemping or knurling processes, or it can be set as a concave-convex structure as in this embodiment.

[0042] According to the self-locking device of the roller motor described above, a self-locking mechanism and a tensioning mechanism are provided inside the roller motor. The self-locking mechanism is connected to the drive mechanism of the roller motor via an input member 22 and to the tensioning mechanism via an output member 23. Furthermore, a self-locking cavity 25 is formed between the input member 22 and the output member 23, and the inner contour of the self-locking cavity 25 is formed into a trapezoidal shape. In addition, a ball bearing 24 is provided in the self-locking cavity 25 so that the input member 22 and the output member 23 are movably connected. Thus, when the roller motor is in operation, a power transmission path can be formed from the drive mechanism to the input component 22, the ball bearing 24, the output component 23, and the tensioning mechanism. When the roller motor is stopped and the load drives the transmission mechanism and transmission part to rotate due to gravity, the output component 23 will rotate accordingly. However, based on the structure of the self-locking cavity 25, the ball bearing 24 can only rotate in contact with the self-locking cavity 25 and cannot drive the input component 22 to rotate, thereby enabling the roller motor to achieve self-locking. Compared with the existing method, this self-locking device is located inside the roller motor, effectively reducing the overall size and weight of the roller motor, and the response is rapid during self-locking without any delay.

[0043] According to a second aspect of the present invention, a roller motor is provided, comprising a main housing 1, the inner cavity of which is provided with the self-locking device, drive mechanism, and transmission mechanism as described above. In this embodiment, the drive mechanism includes a brushless motor 11 and a gearbox 12, the gearbox 12 having a first drive shaft 121. Based on the structure of the gearbox 12, the difficulty of the ball bearing 24 driving the input component 22 to rotate is further increased, thereby further enhancing the locking effect of the self-locking device. The transmission mechanism includes a second transmission shaft fixedly connected to the inner wall of the main housing 1, so that the tensioning mechanism can drive the main housing 1 and the transmission shaft to rotate, thereby outputting power.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A self-locking device for a drum motor, disposed within the inner cavity of the drum motor, characterized in that, The self-locking device of the drum motor includes: The self-locking mechanism includes an input component and an output component, with a self-locking cavity formed between the input component and the output component. The inner contour of the self-locking cavity is formed into a trapezoidal shape. A ball bearing is disposed in the self-locking cavity to allow the input component and the output component to be movably connected. The input component is correspondingly connected to the drive mechanism of the roller motor. The tensioning mechanism is connected to the output component; the tensioning mechanism has a transmission part that is connected to the transmission mechanism of the drum motor. When the roller motor is in operation, the drive mechanism drives the input component to rotate, and the input component drives the output component to rotate through the balls, so as to transmit power to the transmission part of the tensioning mechanism; When the roller motor is in a stopped state and the transmission mechanism drives the transmission part to rotate, the output component can rotate accordingly and drive the ball to rotate in contact with the self-locking cavity, while the input component is in a stationary state so that the roller motor self-locks.

2. The self-locking device for the drum motor according to claim 1, characterized in that, The self-locking mechanism includes a fixed shell, the interior of which forms a receiving cavity that extends through the axial end face of the fixed shell; the input component and the output component are located in the receiving cavity and are arranged sequentially along the axial direction of the fixed shell; the fixed shell, the input component, and the output component correspondingly form the self-locking cavity.

3. The self-locking device for the drum motor according to claim 2, characterized in that, The self-locking mechanism has multiple self-locking cavities, which are evenly distributed at circumferential intervals along the receiving cavity; each self-locking cavity is provided with a ball bearing. In the cross-section of the self-locking mechanism, the inner contour of the self-locking cavity is composed of sequentially connected arc segments, a first inclined segment, a second inclined segment, and a third inclined segment; the output component has the first inclined segment, and the input component has the third inclined segment; the distance between the connection point of the first inclined segment and the second inclined segment and the center of the cross-section is L1, and the distance between the connection point of the third inclined segment and the second inclined segment and the center of the cross-section is L2, where L1 < L2.

4. The self-locking device for the drum motor according to claim 3, characterized in that, The input component includes a first disc and a plurality of first protrusions. The input component is sleeved on the outer side of the first drive shaft of the drive mechanism via the first disc. The plurality of first protrusions are located on the first end face of the first disc away from the drive mechanism, and the plurality of first protrusions are evenly distributed at intervals along the circumference of the first disc. The output component includes a second disc and a second protrusion. The second disc is rotatably connected to the fixed housing via a first bearing. The second protrusion is located on the second end face of the second disc near the drive mechanism. The first protrusion and the second protrusion are correspondingly fitted together and form the self-locking cavity with the corresponding fixed shell.

5. The self-locking device for the drum motor according to claim 4, characterized in that, The second protrusion includes a support block formed in a ring shape and a plurality of stop blocks located on the outer side of the support block; the plurality of stop blocks are evenly spaced along the circumferential direction of the support block; the first protrusion is disposed between any two stop blocks; In the cross-section of the self-locking mechanism, the stop block has a first inclined section, the support block has a second inclined section, and the first protrusion has a third inclined section.

6. The self-locking device for the drum motor according to claim 5, characterized in that, In the cross-section of the self-locking mechanism, the portion of the support block located between any two stop blocks is composed of a first arc segment, a second arc segment, and a third arc segment connected in sequence; Along the radial direction of the self-locking mechanism, the radial thickness of the second arc segment is constant, and the first protrusion is correspondingly disposed on the outer side of the second arc segment; from the stop block to the first protrusion, the radial thickness of the first arc segment and the third arc segment gradually increases.

7. The self-locking device for the drum motor according to claim 5, characterized in that, In the cross-section of the self-locking mechanism, both the first protrusion and the stop block are formed into a trapezoidal shape.

8. The self-locking device for the drum motor according to claim 4, characterized in that, A gap is formed between the first disc and the second disc and the inner wall of the receiving cavity.

9. The self-locking device for the drum motor according to claim 1, characterized in that, The tensioning mechanism includes a bracket assembly connected to the output component and a tensioning member sleeved on the outer side of the bracket assembly. The outer wall of the tensioning member has a friction surface that abuts against the inner wall of the roller motor, and the friction surface forms the transmission part.

10. A drum motor, characterized in that, The drum motor includes a drum motor self-locking device, a drive mechanism, and a transmission mechanism as described in any one of claims 1 to 9. The drive mechanism includes a brushless motor and a gearbox. The transmission mechanism includes a drive shaft that is connected to the inner cavity of the drum motor.

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