A roller brush assembly and a leaf sweeper

Abstract

This invention discloses a roller brush assembly and a leaf sweeper. The roller brush assembly includes a rolling body and at least one set of brush blades disposed on the rolling body. The brush blades include multiple sets of brush units arranged in a row. Each brush unit includes multiple bristle bodies, and the tip of each bristle body has a deformable, non-linear, bent section. By introducing a bristle structure with a bent section, this invention improves the mechanical fit with the ground, alleviates stress concentration and breakage at the bristle root caused by rigid impact, and effectively extends the service life of the bristles. Simultaneously, it enhances the ground adaptability and the ability to collect fine debris during sweeping, reduces operating vibration and noise, and improves the overall machine's operational stability and cleaning performance.

Description

Technical Field

[0001] This invention relates to the field of garden machinery technology, and in particular to a roller brush assembly and a leaf sweeper. Background Technology

[0002] A leaf sweeper is a mechanical device specifically designed for cleaning up garden debris such as fallen leaves, twigs, and grass clippings. It is commonly used for daily cleaning in home courtyards, parks, streets, and residential communities. Its structure generally includes a main unit and a sweeping mechanism and a leaf collection mechanism mounted on the main unit. The inlet of the leaf collection mechanism connects to the sweeping mechanism, which collects fallen leaves and other debris and sends them to the leaf collection mechanism, thus achieving the leaf sweeping function.

[0003] As the execution unit of the sweeping mechanism, the structure of the roller brush assembly directly affects the sweeping effect. Traditional roller brush assemblies generally include a rolling body and brush blades located on the outer periphery of the rolling body. The brush blades are composed of arranged brush units, each with straight bristles. During operation, rigid impacts can easily cause stress concentration at the bristle roots, leading to fatigue fracture. At the same time, the mechanical matching between the bristle tips and the ground or fallen leaves is poor during sweeping. For fallen leaves that adhere closely to the ground or garbage hidden in grass, they are easily bounced away rather than being drawn in. Furthermore, the roller brush assembly requires a high degree of ground flatness, resulting in problems such as low sweeping efficiency and short lifespan.

[0004] Therefore, it is necessary to optimize the structure of the existing leaf sweeper's roller brush assembly to solve the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a roller brush assembly and leaf sweeper that alleviates stress concentration, effectively extends the service life of the brush bristles, and improves the stability and cleaning performance of the sweeping operation.

[0006] The technical solution to achieve the objective of this invention is: A roller brush assembly includes a rolling body and at least one set of brush blades disposed on the rolling body. The brush blades include multiple sets of brush units arranged in a row. Each brush unit includes multiple bristle bodies. The top end of each bristle body is provided with a deformable bending section, and the bending direction of the bending section is towards the rotation direction of the roller brush assembly during operation.

[0007] Furthermore, the bent segment includes at least one arc segment and / or at least one broken line segment.

[0008] Furthermore, the bent section is integrally formed with the bristle body or is connected at an adjustable angle.

[0009] Furthermore, when the bent section is an arc-shaped section integrally formed with the bristle body, the bent section is tangential to the bristle body and its opening direction is parallel to the length direction of the bristle body.

[0010] Furthermore, the bent section is provided with a protective body to limit its deformation and prevent plastic deformation.

[0011] Furthermore, the protective body is a protective layer covering the bent section, the bent section is spring steel wire, high-hardness nylon or carbon fiber, and the protective layer is made of TPE thermoplastic elastomer.

[0012] Furthermore, when the bent segment is an arc-shaped segment, the protective body includes a reinforcing rib disposed on the back of the bent segment and a plurality of limiting portions disposed on the belly of the bent segment; the reinforcing rib extends along the length direction of the bent segment; the plurality of limiting portions are arranged along the length direction of the bent segment, each limiting portion extends along the thickness direction of the bent segment and its size gradually decreases, when the radius of curvature of the bent segment decreases to a preset threshold, adjacent limiting portions abut against each other to limit the bending segment from continuing to deform.

[0013] Furthermore, the cross-section of the bent section is an irregular cross-section with the opening facing the belly of the bent section. The irregular cross-section is C-shaped, U-shaped, or I-shaped, forming the protective body.

[0014] Furthermore, the multiple brush units of the same group of brush blades are arranged in a V-shape.

[0015] A leaf sweeper includes a roller brush assembly as described above.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: (1) By introducing a bristle structure with a bent section, the present invention improves the mechanical compatibility with the ground, improves the stress concentration and breakage problem at the root of the bristles caused by rigid impact, and effectively extends the service life of the bristles; at the same time, it improves the ground adaptability and the ability to collect fine debris during the sweeping process, reduces operating vibration and noise, and improves the overall machine operation stability and cleaning performance.

[0017] (2) The present invention provides a protective body on the bending section to enhance the structural stability and anti-deformation ability of the bending section; when the bristles encounter hard obstacles, the protective body prevents the bending section from undergoing plastic deformation due to excessive bending, ensuring that the bristles can maintain their original shape and cleaning performance after long-term high-frequency operation.

[0018] (3) The present invention arranges the brush units on the same set of brush blades in a V-shape. This layout allows the garbage to converge towards the middle along the V-shaped guide when the roller brush is rotating and cleaning, effectively preventing the garbage from escaping to both ends of the roller brush, and further improving the collection concentration and cleaning effect of the garbage. Attached Figure Description

[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a simplified structural diagram of the roller brush assembly in Example 1; Figure 2 This is a simplified structural diagram of the brush unit in Example 1; Figure 3 This is a simplified structural diagram of the bent section in Example 2; Figure 4 This is a simplified structural diagram of the brush unit in Example 5.

[0020] The labels in the attached diagram are: Rolling element 1, brush blade 2, brush bristle body 2-1, bending section 2-2, protective layer 2-3, reinforcing rib 2-4, limiting part 2-5. Detailed Implementation

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] Example 1: The leaf sweeper in this example includes a main unit and a component installed on the main unit, such as... Figure 1 and 2 The roller brush assembly shown includes a rolling body 1 and three sets of brush blades 2 evenly arranged circumferentially along the rolling body 1. The rolling body 1 is rotatably mounted on the main unit and is connected to the drive mechanism on the main unit, rotating around itself during operation. Each set of brush blades 2 includes multiple brush units arranged in an array, and each brush unit includes multiple brush bristle bodies 2-1 arranged in an array. The top of each brush bristle body 2-1 has a deformable bending section 2-2, and the bending direction of the bending section 2-2 faces the rotation direction of the roller brush assembly during operation. By introducing a brush structure with a bending section, the mechanical matching with the ground is improved, the stress concentration and breakage problems at the bristle root caused by rigid impact are mitigated, and the service life of the bristles is effectively extended. At the same time, it improves the ground adaptability and the ability to collect fine debris during the cleaning process, reduces operating vibration and noise, and improves the overall machine operation stability and cleaning performance.

[0023] Specifically, the bent section 2-2 is integrally formed with the bristle body, improving the overall structural strength and service life of the bristles, simplifying the production process, and reducing manufacturing costs. The bent section 2-2 is an arc-shaped hook, forming an arc segment with the opening direction of the hook opposite to the rotation direction, enhancing the bristles' ability to collect debris. The arc segment effectively prevents debris from being directly bounced away by the rotating bristles when sweeping the ground, reducing the rate of missed sweeps. The bent section 2-2 is tangentially positioned to the bristle body 2-1, and the opening direction of the hook is parallel to the length direction of the bristle body 2-1, making the force on the bristles more even during rotation and allowing for better hooking of debris when in contact with the ground.

[0024] To enhance the structural stability and deformation resistance of the bending section, this embodiment includes a protective layer on the bending section 2-2 to limit its deformation and prevent plastic deformation. The protective layer is a protective layer 2-3 covering the bending section 2-2. The bending section is made of spring steel wire, high-hardness nylon, or carbon fiber, possessing excellent resilience to ensure rapid recovery after deformation. The protective layer 2-3 is made of TPE thermoplastic elastomer, utilizing its toughness to absorb the impact generated during cleaning and extend the service life of the brush tips.

[0025] To further improve the cleaning effect, the multiple brush units of the same group of brush blades 2 in this embodiment are arranged in a V-shape. This layout allows the garbage to converge towards the center along the V-shaped guide when the roller brush assembly rotates for cleaning, effectively preventing the garbage from escaping to both ends of the roller brush, thereby improving the collection concentration of garbage and the cleaning effect.

[0026] Example 2: The structure of this example is similar to that of Example 1, except that... Figure 3 As shown, the bent section 2-2 is made of nylon 66. The protective body consists of reinforcing ribs 2-4 on the back of the bent section 2-2 and multiple limiting parts 2-5 on the abdomen of the bent section 2-2. The reinforcing ribs 2-4 extend along the length of the bent section 2-2. The multiple limiting parts are arranged along the length of the bent section 2-2. Each limiting part 2-5 extends along the thickness of the bent section 2-2 and its size gradually decreases. In this embodiment, a limiting part with a triangular cross-section is used. When the bent section is bent to its limit position, the adjacent limiting parts 2-5 abut against each other and close together to limit the bending of the bent section 2-2 from further deformation and avoid plastic deformation.

[0027] Example 3: The bending section in this example uses the same material as in Example 2, and the structure is similar to that in Example 2. The difference is that the cross-section of the bending section 2-2 is an irregular cross-section with the opening facing the belly of the bending section. This irregular cross-section is C-shaped, U-shaped, or I-shaped, forming a protective body. Compared with a circular cross-section, it improves the bending section's resistance to plastic deformation, and the manufacturing process is simple and the cost is low.

[0028] Example 4: The structure of this example is similar to that of Example 1, except that the bent section 2-2 and the bristle body 2-1 are connected at an adjustable angle. Different bending angles can be set for different ground surfaces to adapt to different working conditions. The specific connection structure is existing technology.

[0029] Example 5: The structure of this example is similar to that of Example 1, except that... Figure 4 As shown, the bending section 2-2 is composed of multiple continuous broken line segments, which also improves the ground adaptability and the ability to collect small debris during the cleaning process.

[0030] The leaf sweeper of this invention adopts a roller brush assembly with a bent section bristle structure, which can better pick up and suck up fallen leaves during sweeping operations and improve the durability of the bristles. It solves the technical problems of existing leaf sweepers that easily scatter garbage and the bristles are prone to deformation and failure, and significantly improves the cleaning performance and service life of the whole machine.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A roller brush assembly, comprising a rolling body and at least one set of brush blades disposed on the rolling body, wherein the brush blades comprise a plurality of arranged brush units, characterized in that: The brush unit includes multiple brush bristle bodies, each brush bristle body having a deformable bending section at its tip; the bending section includes at least one arc segment and / or at least one zigzag segment; the bending section is provided with a protective body to limit its deformation degree, so as to prevent the bending section from undergoing plastic deformation.

2. The roller brush assembly according to claim 1, characterized in that: The bent section is integrally formed with the bristle body or connected at an adjustable angle.

3. A roller brush assembly according to claim 2, characterized in that: When the bent section is an arc-shaped section integrally formed with the bristle body, the bent section is tangential to the bristle body and its opening direction is parallel to the length direction of the bristle body.

4. A roller brush assembly according to claim 1, characterized in that: The protective body is a protective layer covering the bent section, which is made of spring steel wire, high-hardness nylon, or carbon fiber.

5. A roller brush assembly according to claim 1, characterized in that: When the bent segment is an arc-shaped segment, the protective body includes a reinforcing rib on the back of the bent segment and a plurality of limiting portions on the belly of the bent segment; the reinforcing rib extends along the length direction of the bent segment; the plurality of limiting portions are arranged along the length direction of the bent segment, each limiting portion extends along the thickness direction of the bent segment and its size gradually decreases, when the radius of curvature of the bent segment decreases to a preset threshold, adjacent limiting portions abut against each other to limit the bending segment from continuing to deform.

6. A roller brush assembly according to claim 1, characterized in that: The cross-section of the bent section is an irregular cross-section with the opening facing the belly of the bent section. The irregular cross-section is C-shaped, U-shaped, or I-shaped, forming the protective body.

7. A roller brush assembly according to any one of claims 1 to 6, characterized in that: The multiple brush units of the same group of brush blades are arranged in a V-shape.

8. A leaf sweeper, characterized in that: Includes the roller brush assembly as described in any one of claims 1 to 7.

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