Swing arm assembly and cleaning device

Abstract

The application relates to a swing arm assembly and a cleaning device. The swing arm assembly comprises a transmission member, an input gear, an elastic member, a driver and a swing arm. The transmission member comprises a transmission shaft and a transmission gear fixed to the transmission shaft, and the transmission gear rotates coaxially with the transmission shaft. The input gear is slidably sleeved on the transmission shaft, so that the input gear can slide relative to the transmission gear along the axial direction of the transmission shaft. The transmission gear is provided with a first engagement part, and the input gear is provided with a second engagement part. When the input gear and the transmission gear move relative to each other along the axial direction of the transmission shaft, the first engagement part and the second engagement part are coupled or decoupled. In the coupled state, the input gear rotates coaxially with the transmission member, and in the decoupled state, the input gear rotates relative to the transmission member. Therefore, for the cleaning device provided with the swing arm assembly according to the application, the swing arm is adaptively rotated to an adaptive position according to the environment structure, and the adaptive position of the side-sweeping position is realized.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to a swing arm assembly and a cleaning device having the swing arm assembly. Background Technology

[0002] The side brushes of cleaning equipment (such as sweepers) are usually fixed inside the edge of the machine body. When cleaning an inner right angle, the side brush cannot sweep up the debris in the inner right angle. In order to meet this requirement, the side brush is designed to swing flexibly. When it encounters an inner right angle, the swing arm expands outward so that the side brush can cover the inner right angle.

[0003] In real life, there are various types of inner right angles, and the algorithm is difficult to recognize them. If the swing angle of the swing arm is designed to be a fixed swing angle, the side brush will not be able to adapt to different inner right angles, and there is a risk that the swing arm may be damaged or bump into furniture due to protruding from the body. Utility Model Content

[0004] Therefore, it is necessary to provide a swing arm assembly to address the above-mentioned problems.

[0005] A swing arm assembly includes:

[0006] The transmission component includes transmission gears and a transmission shaft, with the transmission gears fixed to the transmission shaft.

[0007] An input gear is fitted onto a drive shaft and can slide relative to the drive gear along the axial direction of the drive shaft.

[0008] The transmission gear is provided with a first meshing part, and the input gear is provided with a second meshing part. The input gear and the transmission gear move relative to each other along the axial direction of the transmission shaft, so that the first meshing part and the second meshing part are coupled or decoupled.

[0009] An elastic element is configured to apply an elastic force toward the input gear to the drive teeth in the axial direction of the drive shaft;

[0010] The driver is connected to the input gear drive;

[0011] The swing arm has teeth that mesh with the transmission teeth.

[0012] The aforementioned swing arm assembly includes a transmission component, an input gear, an elastic element, a driver, and a swing arm. The transmission component includes a transmission shaft and transmission teeth fixed to the transmission shaft, the transmission teeth rotating coaxially with the transmission shaft. The input gear is slidably fitted onto the transmission shaft, allowing the input gear to slide relative to the transmission teeth along the axial direction of the transmission shaft. The transmission teeth have a first meshing portion, and the input gear has a second meshing portion. When the input gear is fitted onto the transmission shaft, the first and second meshing portions are positioned opposite each other along the axial direction of the transmission shaft. Thus, when the input gear and the transmission teeth move relative to each other along the axial direction of the transmission shaft, the first and second meshing portions are coupled or decoupled. In the coupled state, the input gear rotates coaxially with the transmission component; in the decoupled state, the input gear rotates relative to the transmission component. Therefore, for a cleaning device equipped with the swing arm assembly according to this application, the swing arm can adaptively rotate to a suitable maximum angle according to the environmental structure; that is, for the side sweeper of the cleaning device, adaptive side sweeping position is achieved.

[0013] In one embodiment, the swing arm assembly further includes a driver, which includes a drive body and a drive shaft, the drive body driving the drive shaft to rotate, wherein the drive shaft is configured as a worm gear structure.

[0014] The input gear is constructed as a helical gear.

[0015] In one embodiment, the first and second engaging portions are constructed as mutually mating concave-convex curved surfaces; or,

[0016] Both the first and second meshing parts are constructed as mutually mating tooth structures; or,

[0017] The first and second meshing parts consist of mutually fitting protrusions and grooves.

[0018] In one embodiment, the transmission component is a one-piece molded part; or,

[0019] The transmission gears are detachably mounted on the transmission shaft.

[0020] In one embodiment, the swing arm assembly further includes an elastic element sleeved on the drive shaft, such that the elastic element is configured to apply an elastic force toward the input gear to the drive teeth.

[0021] In one embodiment, the tooth is constructed as a rack, and a limiting block is provided at the end of the tooth along the extension direction of the tooth, the limiting block abutting and limiting the transmission tooth.

[0022] In one embodiment, the swing arm assembly further includes a buffer, which is disposed on the transmission gear and / or the input gear;

[0023] When the first meshing part and the second meshing part are in a coupled state, the buffer is clamped between the transmission teeth and the input gear along the axial direction of the transmission shaft.

[0024] In one embodiment, the buffer is constructed in a ring shape and is fitted onto the drive shaft.

[0025] In one embodiment, the transmission gear and / or input gear are provided with mounting slots, and the buffer is assembled in the mounting slots.

[0026] This application further proposes a cleaning device, which includes:

[0027] body;

[0028] According to some of the above embodiments, the swing arm assembly is mounted on the fuselage. Attached Figure Description

[0029] Figure 1 This is a perspective view of a swing arm assembly according to an embodiment of this application.

[0030] Figure 2 This is an assembly diagram of a transmission component, input gear, elastic component, and buffer component according to an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of the structure of a transmission member, input gear, elastic member, and buffer member according to an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of a cleaning device according to an embodiment of the present application, showing the swing arm in a retracted state.

[0033] Figure 5 This is a schematic diagram of a cleaning device according to an embodiment of the present application, in which the swing arm is in an outward swing state.

[0034] Figure label:

[0035] 100. Swing arm assembly; 1. Transmission component; 11. Transmission gear; 110. First meshing part; 12. Transmission shaft; 2. Input gear; 20. Second meshing part; 3. Elastic component; 4. Driver; 41. Drive body; 42. Drive shaft; 5. Swing arm; 50. Gear; 501. Limiting block; 6. Buffer component; 200. Cleaning equipment; 201. Body; 202. Side brush. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] See Figures 1 to 3 As shown, the swing arm assembly 100 according to this application includes a transmission member 1, an input gear 2, and a swing arm 5. The transmission member 1 includes a transmission tooth 11 and a transmission shaft 12. The transmission tooth 11 is fixed to the transmission shaft 12, that is, the transmission tooth 11 disposed on the transmission shaft 12 rotates coaxially with the transmission shaft 12. The input gear 2 is slidably sleeved on the transmission shaft 12, so that the input gear 2 can slide relative to the transmission tooth 11 along the axial direction of the transmission shaft 12. The transmission tooth 11 is provided with a first meshing portion 110, and the input gear 2 is provided with a second meshing portion 20. When the input gear 2 is sleeved on the transmission shaft 12, the first meshing portion 110 and the second meshing portion 20 are positioned opposite each other along the axial direction of the transmission shaft 12. Thus, when the input gear 2 and the transmission tooth 11 move relative to each other along the axial direction of the transmission shaft 12, the first meshing portion 110 and the second meshing portion 20 are coupled or decoupled. It should be understood that when the first meshing part 110 and the second meshing part 20 are coupled, the input gear 2 and the transmission gear 11 rotate coaxially, that is, the input gear 2 and the transmission component 1 rotate coaxially; when the input gear 2 and the transmission gear 11 are decoupled, the input gear 2 and the transmission gear 11 cannot rotate coaxially, and the input gear 2 and the transmission component 1 can rotate relative to each other.

[0043] Furthermore, see Figure 1 As shown, the tooth profiles of both the transmission tooth 11 and the tooth portion 50 are straight teeth extending axially along the transmission shaft 12. Thus, when the first meshing portion 110 and the second meshing portion 20 switch between a coupled state and a decoupled state, the transmission member 1 can move relative to the input gear 2 along the axial direction of the transmission shaft 12, and ensures that the transmission tooth 11 is always in mesh with the tooth portion 50 of the rocker arm 5.

[0044] For example, in combination Figures 1 to 5 As shown, the application of the swing arm assembly 100 to a cleaning device 200 (such as a sweeper) is used as an example for illustration. It should be noted that this application uses the application of the swing arm assembly 100 to a cleaning device 200 as an example for illustration, but this application is not limited to this, and the swing arm assembly 100 can also be applied to other devices that require the swing arm assembly 100.

[0045] Combination Figures 1 to 5As shown, the cleaning device 200 includes a body 201, a swing arm assembly 100 mounted on the body 201, and a side brush 202 of the cleaning device 200 mounted on the swing arm 5 in the swing arm assembly 100. The swing arm assembly 100 may also include a driver 4, which is connected to the input gear 2 for transmission, i.e., the driver 4 drives the input gear 2 to rotate. It should be understood that when the first engagement part 110 is coupled to the second engagement part 20, the driver 4 drives the input gear 2 to rotate, further driving the transmission member 1 to rotate, and the swing arm 5 swings outward under the driving action of the transmission member 1. If the swing arm 5 is subjected to an external force and can no longer swing outward, the first engagement part 110 and the second engagement part 20 switch from a coupled state to a decoupled state, allowing the input gear 2 and the transmission member 1 to rotate relative to each other. That is, when the first engagement part 110 and the second engagement part 20 are decoupled, the input gear 2 is in an idle state, so that the force output by the driver 4 does not act on the swing arm 5, preventing the swing arm 5 from continuing to swing outward when subjected to an external force, and allowing the swing arm 5 to maintain its current swing angle. Thus, the driver 4 can drive the swing arm 5 to swing outward relative to the body 201, thereby driving the side brush 202 to swing outward relative to the body 201, so that the side brush 202 can be used to clean scenes with right angles (such as corners). In this way, the cleaning device 200 equipped with the swing arm assembly 100 according to this application can be used in a variety of cleaning scenarios.

[0046] Furthermore, since the first meshing part 110 is disposed on the transmission gear 11 and the second meshing part 20 is disposed on the input gear 2, and the input gear 2 is slidably sleeved on the transmission shaft 12, the input gear 2 and the transmission member 1 can move relative to each other in the axial direction of the transmission shaft 12. That is, by controlling the relative movement of the input gear 2 and the transmission member 1 along the axial direction of the transmission shaft 12, the first meshing part 110 and the second meshing part 20 can be coupled or decoupled.

[0047] For example, in some embodiments of this application, the swing arm assembly 100 may further include a sliding mechanism (not shown in the figure), which is connected to the transmission member 1 and is used to drive the transmission member 1 to move axially along the transmission shaft 12. Thus, the transmission member 1 achieves the effect of relative movement with the input gear 2 under the driving action of the sliding mechanism, thereby achieving the effect of coupling or decoupling between the first meshing part 110 and the second meshing part 20.

[0048] Or, see Figure 1As shown, in some embodiments of this application, the swing arm assembly 100 may further include an elastic element 3. In the axial direction of the transmission shaft 12, the elastic element 3 is configured to apply an elastic force toward the input gear 2 to the transmission teeth 11. Thus, when the axial force between the first engagement portion 110 and the second engagement portion 20 is less than or equal to the elastic force applied by the elastic element 3 to the transmission teeth 11, the first engagement portion 110 and the second engagement portion 20 remain coupled, ensuring stable transmission between the input gear 2 and the transmission member 1; when the axial force between the first engagement portion 110 and the second engagement portion 20 is greater than or equal to the elastic force applied by the elastic element 3 to the transmission teeth 11, the first engagement portion 110 and the second engagement portion 20 are decoupled, allowing relative rotation between the input gear 2 and the transmission member 1, i.e., the input gear 2 and the transmission member 1 cannot transmit force between them.

[0049] For details, please refer to Figures 1 to 3 As shown, in one embodiment of this application, the swing arm assembly 100 includes a transmission member 1, an input gear 2, a swing arm 5, a driver 4, and an elastic member 3. The elastic member 3 applies an upward elastic force along the axial direction of the transmission shaft 12 to the transmission gear 11 (i.e., the direction of the elastic force is towards the input gear 2), causing the first meshing portion 110 and the second meshing portion 20 to be coupled. Based on this, when the side brush 202 swings outward relative to the body 201, the driver 4 drives the input gear 2 to rotate clockwise (from the axial direction of the transmission shaft 12 from the input gear 2 to the transmission gear 11 side as the perspective), and the input gear 2 drives the transmission member 1 to rotate synchronously clockwise. Since the transmission member 1 rotates clockwise, the swing arm 5, which meshes with the transmission gear 11, rotates counterclockwise, thereby achieving the effect of the swing arm 5 swinging outward relative to the body 201, and thus causing the side brush 202 disposed on the swing arm 5 to swing outward relative to the body 201.

[0050] For example, when the swing arm 5 comes into contact with an obstacle during its outward swing, the obstacle prevents the swing arm 5 from continuing to swing outward relative to the fuselage 201, causing the swing arm 5 to reach its maximum outward swing angle. In this state, since the swing arm 5 can no longer swing outward relative to the fuselage 201, the swing arm 5 is in a stopped rotating state, and the transmission gear 11 meshing with the swing arm 5 also changes to a stopped rotating state.

[0051] Furthermore, since the driver 4 is still driving the input gear 2 to rotate clockwise, the second meshing part 20 of the input gear 2 applies a downward pressure to the first meshing part 110 of the transmission gear 11. This downward pressure is greater than the upward elastic force applied by the elastic member 3 to the transmission gear 11. In other words, the downward pressure applied by the input gear 2 to the transmission gear 11 is greater than the upward elastic force (i.e., upward support force) applied by the elastic member 3 to the transmission gear 11. This causes the transmission member 1 to move downward relative to the input gear 2, thereby switching the first meshing part 110 and the second meshing part 20 from a coupled state to a decoupled state. This allows the input gear 2 to rotate independently (or, in other words, the first meshing part 110 and the second meshing part 20 to slip). It should be noted that the first meshing part 110 and the second meshing part 20 are always in contact friction during the decoupled state, ensuring that the input gear 2 can apply a certain torque to the transmission member 1 to maintain the transmission member 1 at its current rotation angle, thus ensuring that the swing arm 5 is at its current swing angle.

[0052] Then, when the swing arm 5 is released from contact with the obstacle, and the swing arm 5 has not reached the maximum outward swing angle, since the downward pressure applied by the input gear 2 to the transmission gear 11 is less than the upward elastic force (i.e. upward support force) applied by the elastic member 3 to the transmission gear 11, the transmission member 1 moves upward under the action of the elastic member 3, so that the first meshing part 110 and the second meshing part 20 switch from the decoupled state to the coupled state, so that the swing arm 5 continues to swing outward under the drive of the driver 4.

[0053] In summary, the swing arm assembly 100 according to this application includes a transmission component 1, an input gear 2, and a swing arm 5. The transmission component 1 includes a transmission shaft 12 and transmission teeth 11 fixed to the transmission shaft 12, with the transmission teeth 11 rotating coaxially with the transmission shaft 12. The input gear 2 is slidably fitted onto the transmission shaft 12, allowing it to slide relative to the transmission teeth 11 along the axial direction of the transmission shaft 12. The transmission teeth 11 are provided with a first meshing portion 110, and the input gear 2 is provided with a second meshing portion 20. When the input gear 2 is fitted onto the transmission shaft 12, the first meshing portion 110 and the second meshing portion 20 are positioned opposite each other along the axial direction of the transmission shaft 12. Thus, when the input gear 2 and the transmission teeth 11 move relative to each other along the axial direction of the transmission shaft 12, the first meshing portion 110 and the second meshing portion 20 are coupled or decoupled. In the coupled state, the input gear 2 rotates coaxially with the transmission component 1; in the decoupled state, the input gear 2 rotates relative to the transmission component 1. Therefore, for a cleaning device 200 equipped with a swing arm assembly 100 according to the present application, the swing arm 5 can adaptively rotate to the maximum suitable angle according to the environmental structure, that is, for the side sweeper of the cleaning device 200, the side sweeper position is adaptively adjusted.

[0054] See Figure 1As shown, in some embodiments of this application, the driver 4 may include a drive body 41 and a drive shaft 42. The drive body 41 drives the drive shaft 42 to rotate, wherein the drive shaft 42 is constructed as a worm gear. The input gear 2 is constructed as a helical gear. Thus, when the drive shaft 42 and the input gear 2 are engaged, the axis of the drive shaft 42 is perpendicular to the axis of the input gear 2. This design reduces the axial dimension of the swing arm assembly 100 in the transmission shaft 12.

[0055] For example, in combination Figure 1 and Figure 4 As shown, when the swing arm assembly 100 is mounted on the body 201 of the cleaning device 200, the axial direction of the drive shaft 12 extends along the height direction of the cleaning device 200. Since the drive shaft 42 is constructed as a worm gear and the input gear 2 is constructed as a helical gear, the driver 4 is placed laterally within the body 201 of the cleaning device 200. This results in a smaller space occupied by the swing arm assembly 100 in the height direction of the cleaning device 200, thus reducing the overall height of the cleaning device 200. It should be understood that because the maximum height of the cleaning device 200 is effectively controlled, it can access lower spaces (such as under beds and sofas) for cleaning, expanding its application scenarios and improving the user experience.

[0056] It should be further noted that the above embodiments are described using a worm gear structure as an example of the connection between the driver 4 and the input gear 2, but this application is not limited to this. For example, the driver 4 and the input gear 2 are directly connected. Specifically, the drive shaft 42 of the driver 4 is coaxially arranged with the input gear 2 and the transmission component 1, and the drive shaft 42 of the driver 4 is fixedly connected to the input gear 2, thereby achieving the effect of the driver 4 directly driving the input gear 2 to rotate. Alternatively, the axis of the drive shaft 42 of the driver 4 is parallel to the axis of the input gear 2, and the drive shaft 42 is provided with a gear suitable for meshing and transmitting power with the input gear 2, thereby achieving the effect of the driver 4 driving the input gear 2 to rotate.

[0057] See Figure 3As shown, in some embodiments of this application, the first meshing portion 110 and the second meshing portion 20 are constructed as mutually cooperating concave-convex curved surfaces. Exemplarily, in one embodiment of this application, the upper surfaces of both the first meshing portion 110 and the second meshing portion 20 are continuous concave-convex curved surfaces. For example, it can be understood that both the first meshing portion 110 and the second meshing portion 20 are annular tooth structures composed of multiple teeth arranged in a circular pattern, wherein the outer surface of each tooth is curved, thus making the upper surfaces of both the first meshing portion 110 and the second meshing portion 20 continuous concave-convex curved surfaces. Based on this structural design, when the first meshing portion 110 and the second meshing portion 20 are in a coupled state, the continuous curved surfaces allow them to form a large-area meshing contact, ensuring the stability and uniformity of the torque transmitted from the input gear 2 to the transmission gear 11, and avoiding local stress concentration. When the input gear 2 and the transmission gear 11 are subjected to axial force and move relative to each other to a decoupled state, the continuous concave and convex curved surfaces create a smooth sliding friction pair between the first meshing part 110 and the second meshing part 20. At this time, although the two still maintain contact, the continuous characteristics of the curved surfaces significantly reduce the sliding friction resistance, allowing the input gear 2 to slide smoothly relative to the transmission gear 11, while ensuring that the transmission gear 11 maintains a slight contact pressure with the input gear 2 under the action of the axial elastic force of the elastic element 3. In this way, component wear caused by rigid impact is avoided, and a small torque is applied to the transmission element 1 through continuous friction, so that the swing arm 5 can stably maintain the current swing angle.

[0058] For example, taking the cleaning device 200 during operation: when the side brush 202 is obstructed from swinging outward, the axial downward pressure applied by the input gear 2 to the transmission gear 11 overcomes the elastic force of the elastic element 3, forcing the first meshing part 110 and the second meshing part 20 to slide relative to each other along the curved surface. Since the tooth profile is a continuous curved surface, the decoupling process is smooth and without jamming, the idling noise of the input gear 2 is significantly reduced, and the wear between the transmission gear 11 and the input gear 2 is reduced. When the obstacle is removed, the elastic element 3 pushes the transmission gear 11 upward, and the curved surface guides the first meshing part 110 and the second meshing part 20 to quickly re-mesh, driving the swing arm 5 to continue swinging outward.

[0059] In summary, by constructing the first engagement portion 110 and the second engagement portion 20 as mutually cooperating concave and convex curved surfaces, the smoothness of torque transmission, the smoothness of decoupling action, and the durability of components are further optimized.

[0060] It should be noted that the above embodiments are described using the example of the first meshing portion 110 and the second meshing portion 20 being constructed as mutually cooperating concave and convex curved surfaces, but this application is not limited to this. For example, in some other embodiments of this application, the first meshing portion 110 and the second meshing portion 20 are both constructed as mutually cooperating tooth structures. For example, the first meshing portion 110 and the second meshing portion 20 are mutually adapted crown gears.

[0061] Alternatively, in some embodiments of this application, the first engaging portion 110 and the second engaging portion 20 are mutually cooperating protrusions and grooves. For example, the first engaging portion 110 includes multiple protrusions arranged in a ring; the second engaging portion 20 correspondingly includes multiple grooves arranged in a matching ring. When the first engaging portion 110 and the second engaging portion 20 are coupled, each protrusion moves into its corresponding groove and remains in the groove. When the first engaging portion 110 and the second engaging portion 20 switch from a coupled state to a decoupled state, the protrusion moves out of the groove. When the first engaging portion 110 and the second engaging portion 20 are decoupled, the protrusion still moves into and out of the groove at a certain frequency because the transmission member 1 and the input gear 2 rotate. In this way, a smooth sliding friction pair is formed between the first engaging portion 110 and the second engaging portion 20, thereby applying a small torque to the transmission member 1 and keeping the swing arm 5 stably maintaining the current swing angle.

[0062] See Figure 2 and Figure 3 As shown, in some embodiments of this application, the transmission component 1 is a one-piece molded part. It should be understood that a one-piece molded part refers to a part where the transmission gear 11 and the transmission shaft 12 are formed from the same material in a single process (e.g., through injection molding, casting, or machining), with no assembly interface or connecting structure between them, forming an inseparable whole. Based on this structural design, since the transmission gear 11 and the transmission shaft 12 are fixed by a one-piece molding method, the connection strength between them is significantly higher than that of a split assembly structure. During the operation of the swing arm assembly 100, when the transmission component 1 is in a torque transmission state (i.e., when the first meshing part 110 is coupled with the second meshing part 20), the transmission gear 11 directly applies the torque transmitted by the input gear 2 to the transmission shaft 12. The one-piece molded structure can withstand greater radial shear force and torsional stress, avoiding transmission failure caused by loosening of the split connection. Meanwhile, in the decoupled state, when the input gear 2 applies an axial impact force to the transmission gear 11 (for example, when the swing arm 5 is obstructed, the input gear 2 applies a violent downward pressure to the transmission gear 11), the integrally formed structure can effectively resist the concentrated action of the axial load and prevent deformation or breakage at the connection between the transmission gear 11 and the transmission shaft 12.

[0063] For example, taking the side brush 202 of the cleaning device 200 cleaning a corner as an example: when the side brush 202 frequently collides with obstacles, the transmission component 1 needs to repeatedly withstand the axial impact in the decoupled state and the torque load in the coupled state. The one-piece molded structure eliminates the risk of fretting wear or fatigue fracture that may occur with traditional split transmission components 1 (such as the transmission gear 11 press-fitted to the transmission shaft 12), ensuring that the transmission component 1 can still maintain structural integrity under long-term high-frequency impact, thereby improving the reliability of the swing arm assembly 100 under complex working conditions. By designing the transmission component 1 as a one-piece molded part, the connection rigidity between the transmission gear 11 and the transmission shaft 12 is significantly enhanced, thereby improving the impact resistance and service life of the swing arm assembly 100.

[0064] In some other embodiments of this application, the transmission gear 11 and the transmission shaft 12 in the transmission component 1 are two independent components, and the transmission gear 11 is detachably assembled to the transmission shaft 12. For example, when the transmission gear 11 is worn due to long-term use (e.g., tooth surface wear caused by meshing with the teeth 50 of the rocker arm 5) or damaged by external impact, the transmission gear 11 can be directly disassembled and replaced without replacing the transmission shaft 12 or the entire transmission component 1. It should be further noted that the transmission gear 11 and the transmission shaft 12 are fixedly connected by a rigid connection (e.g., key connection, screw connection, or snap connection), so that the transmission gear 11 and the transmission shaft 12 can achieve the requirement of coaxial rotation.

[0065] See Figure 1 and Figure 2 As shown, in some embodiments of this application, the elastic element 3 is sleeved on the drive shaft 12 so that, in the axial direction of the drive shaft 12, the elastic element 3 is adapted to abut against the drive gear 11 to apply an elastic force to the drive gear 11. Simultaneously, since the elastic element 3 is sleeved on the drive shaft 12, it is advantageous to reduce the size of the swing arm assembly 100 in the direction of the drive shaft 12, thereby facilitating a reduction in the height of the cleaning device 200. For example, see [reference needed]. Figure 1 and Figure 2 As shown, in one embodiment of this application, the elastic element 3 is selected as a helical spring, but this application is not limited to this. For example, the elastic element 3 can also be elastic rubber. The elastic rubber is provided with a through hole extending along its own axial direction. When the elastic rubber is assembled with the transmission component 1, the transmission shaft 12 of the transmission component 1 passes through the through hole of the elastic rubber, thereby achieving the effect of the elastic rubber being sleeved on the transmission shaft 12.

[0066] See Figure 1As shown, in some embodiments of this application, the tooth 50 is constructed as a rack, and a limiting block 501 is provided at the end of the tooth 50 along the extending direction of the tooth 50. The limiting block 501 abuts against the transmission tooth 11 to limit its movement. It should be understood that the limiting block 501 is a rigid protruding structure (such as a metal block or a high-strength plastic block), and its position is configured such that when the swing arm 5 rotates to the maximum outward swing angle, the limiting block 501 abuts against the transmission tooth 11 to prevent the transmission tooth 11 from continuing to drive the rack to move.

[0067] For example, consider the process of the side brush 202 of the cleaning device 200 swinging from the inside out. When the cleaning device 200 is operating in an open area, the swing arm 5 is unobstructed. When the swing arm 5 swings out to its maximum designed angle (e.g., 90°), the limiting block 501 at the end of the rack abuts against the transmission gear 11. The transmission gear 11 stops rotating, causing the downward pressure of the input gear 2 on the transmission gear 11 to surge, instantly overcoming the upward elastic force of the elastic member 3. The transmission member 1 moves downward, decoupling the first meshing part 110 from the second meshing part 20. At this time, the input gear 2 is in a slipping, free-spinning state, and the swing arm 5 stably maintains a 90° outward swing angle. By providing the limiting block 501 on the tooth 50, when the swing arm 5 rotates to its maximum rotation angle, a mechanical hard limit is formed between the swing arm 5 and the transmission member 1, preventing the swing arm 5 from rotating excessively.

[0068] See Figure 1 As shown, in the above embodiment, the tooth 50 provided on the rocker arm 5 is constructed as an arc-shaped rack structure, but this application is not limited to this. For example, the tooth 50 can also be constructed as a gear.

[0069] See Figure 2 and Figure 3As shown, in some embodiments of this application, the swing arm assembly 100 may further include a buffer 6, which is disposed on the transmission gear 11 and / or the input gear 2. For example, the buffer 6 is disposed on the transmission gear 11; or, the buffer 6 is disposed on the input gear 2; or, both the transmission gear 11 and the input gear 2 are provided with buffers 6. When the first meshing portion 110 and the second meshing portion 20 are coupled, the buffer 6 is sandwiched between the transmission gear 11 and the input gear 2 in the axial direction of the transmission shaft 12. It should be understood that the buffer 6 is made of an elastic material (such as rubber or silicone pad), and its thickness is configured to produce compressive deformation when the transmission gear 11 and the input gear 2 are axially pressed together. Based on this, when the transmission member 1 couples the first meshing portion 110 and the second meshing portion 20 under the action of the elastic member 3, the buffer 6 is subjected to axial compression by the transmission gear 11 and the input gear 2, generating elastic force. This elastic force is converted into additional friction between the meshing parts, significantly enhancing the reliability of torque transmission between the input gear 2 and the transmission gear 11, and preventing accidental slippage during coaxial rotation. At the same time, the elastic deformation of the buffer 6 absorbs the axial collision energy between the transmission gear 11 and the input gear 2, reducing the impact noise and component wear caused by "rigid contact".

[0070] For example, consider the reset process of the side brush 202 of the cleaning device 200. After the swing arm 5 disengages from the obstacle, the elastic element 3 pushes the transmission element 1 upward. At the instant the first meshing portion 110 of the transmission gear 11 recouples with the second meshing portion 20 of the input gear 2, the buffer element 6 first contacts and compresses. During this process, the buffer element 6 reduces the impact force of the upward movement of the transmission element 1, preventing the transmission gear 11 from colliding hard with the input gear 2 and producing abnormal noise. After the first meshing portion 110 and the second meshing portion 20 are coupled, the compressed buffer element 6 continues to provide axial pressure, increasing the friction between the first meshing portion 110 and the second meshing portion 20, ensuring that the torque of the driver 4 is stably transmitted to the transmission gear 11, driving the swing arm 5 to continue swinging outward without the risk of slippage.

[0071] See Figure 2 and Figure 3 As shown, in some embodiments of this application, the buffer 6 is constructed in an annular shape and is sleeved on the drive shaft 12. Furthermore, the inner diameter of the buffer 6 is larger than the outer diameter of the first engaging portion 110 and the second engaging portion 20 to ensure that the buffer 6 is sleeved on the outside of the first engaging portion 110 and the second engaging portion 20. Thus, when the first engaging portion 110 and the second engaging portion 20 are coupled, the buffer 6 is sandwiched between the transmission gear 11 and the input gear 2.

[0072] It should be further explained that, because the buffer 6 is annular in shape, it is uniformly pressed across the entire annular contact surface between the transmission gear 11 and the input gear 2. When the first meshing part 110 couples with the second meshing part 20 (e.g., in the reset state), the annular body undergoes axisymmetric elastic deformation, ensuring a balanced axial pressure distribution between the transmission gear 11 and the input gear 2, and avoiding uneven wear caused by localized stress concentration. See also... Figure 2 and Figure 3 As shown, the buffer 6 can be a single component, i.e., the buffer 6 is a ring, which simplifies the assembly of the buffer 6. Alternatively, the buffer 6 can be formed by combining multiple buffer units, which are arranged sequentially to form a ring.

[0073] In some embodiments of this application, the transmission gear 11 and / or the input gear 2 are provided with mounting grooves, and the buffer 6 is assembled within the mounting grooves. When the buffer 6 is assembled within the mounting grooves, the sidewalls of the mounting grooves constrain the buffer 6, effectively preventing the buffer 6 from radially shifting or twisting when the transmission gear 11 and the input gear 2 rotate relative to each other. This design ensures that the buffer 6 always remains within the preset pressure area, avoiding uneven local friction caused by shifting.

[0074] For example, see Figure 2 and Figure 3 As shown, taking the structure of the buffer 6 as an example of a circular ring, the mounting groove is designed to fit the circular groove. When the buffer 6 is assembled in the mounting groove, the side wall of the mounting groove abuts against the peripheral wall of the buffer 6, thereby effectively preventing the buffer 6 from radially shifting or twisting when the transmission gear 11 and the input gear 2 rotate relative to each other.

[0075] In other embodiments of this application, for example, the buffer element is formed by combining multiple buffer units, thus the number of mounting slots is set to multiple, and the multiple mounting slots are arranged in a ring, wherein each mounting slot is used to assemble one buffer unit, so that the multiple buffer units are arranged sequentially to form a ring. Further, in one embodiment of this application, two sets of buffer elements are included (i.e., each set of buffer elements includes multiple buffer units), and both the transmission gear 11 and the input gear 2 are provided with multiple mounting slots, and the mounting slots provided on the transmission gear 11 and the mounting slots provided on the input gear 2 are staggered in the circumferential direction of the transmission shaft 12. Thus, when both the mounting slots of the transmission gear 11 and the mounting slots of the input gear 2 are equipped with buffer units, the buffer units provided on the transmission gear 11 and the buffer units provided on the input gear 2 are staggered in the circumferential direction of the transmission shaft 12. When the first meshing part 110 and the second meshing part 20 are in a coupled state, the buffer unit disposed on the transmission gear 11 can be embedded between two adjacent buffer units disposed on the input gear 2, so that the buffer unit disposed on the transmission gear 11 and the buffer unit disposed on the input gear 2 form a "meshing connection" state, thereby further increasing the friction between the transmission component 1 and the input gear 2, ensuring that the torque of the driver 4 is stably transmitted to the transmission gear 11, and the drive swing arm 5 continues to swing outward without the risk of slippage.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A swing arm assembly, characterized in that, include: A transmission component, comprising transmission teeth and a transmission shaft, wherein the transmission teeth are fixed to the transmission shaft; An input gear is sleeved on the drive shaft, and the input gear is slidable relative to the drive teeth along the axial direction of the drive shaft; The transmission gear is provided with a first meshing part, and the input gear is provided with a second meshing part. The input gear and the transmission gear move relative to each other along the axial direction of the transmission shaft, so that the first meshing part and the second meshing part are coupled or decoupled. The swing arm is provided with teeth that mesh with the transmission teeth.

2. The swing arm assembly according to claim 1, characterized in that, Also includes: A driver, comprising a drive body and a drive shaft, wherein the drive body drives the drive shaft to rotate, and wherein the drive shaft is configured as a worm gear structure; The input gear is constructed as a helical gear.

3. The swing arm assembly according to claim 1, characterized in that, The first and second meshing portions are constructed as mutually mating concave and convex curved surfaces; or, Both the first meshing portion and the second meshing portion are constructed as mutually engaging tooth structures; or, The first engagement portion and the second engagement portion are mutually cooperating protrusions and grooves.

4. The swing arm assembly according to claim 1, characterized in that, The transmission component is a one-piece molded part; or... The transmission gear is detachably mounted on the transmission shaft.

5. The swing arm assembly according to claim 1, characterized in that, Also includes: An elastic element is sleeved on the drive shaft such that the elastic element is configured to apply an elastic force toward the input gear to the drive teeth.

6. The swing arm assembly according to claim 1, characterized in that, The toothed structure is a rack, and a limiting block is provided at the end of the toothed section along the extending direction of the toothed section. The limiting block abuts and limits the transmission tooth.

7. The swing arm assembly according to any one of claims 1 to 6, characterized in that, Also includes: A buffer element, wherein the buffer element is disposed on the transmission gear and / or the input gear; When the first meshing part and the second meshing part are coupled, the buffer is clamped between the transmission teeth and the input gear along the axial direction of the transmission shaft.

8. The swing arm assembly according to claim 7, characterized in that, The buffer is constructed in a circular shape and is sleeved on the drive shaft.

9. The swing arm assembly according to claim 7, characterized in that, The transmission gear and / or the input gear are provided with mounting grooves, and the buffer is assembled in the mounting grooves.

10. A cleaning device, characterized in that, include: body; The swing arm assembly according to any one of claims 1 to 9 is mounted on the fuselage.

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