Cutter head structure and mower
By employing a dual-cavity design and air guide components on the lawnmower's blade, the clogging problem of traditional blades under high grass loads or wet grass clippings has been solved, achieving efficient grass clipping handling and grass removal capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING DAJIANG POWER EQUIP MFG
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-12
AI Technical Summary
传统刀盘在高草量或潮湿草屑时易因腔内气流紊乱导致草屑滞留、堆积，甚至引发堵塞，影响作业效率。
The design employs a dual-cavity system for partitioned processing of grass clippings, with an air guide assembly between the first and second cavities. This assembly includes two independent air guide sections that guide the grass clippings to the discharge port using the air guide surface. The combination of the circular cavities and the arc-shaped air guide surface creates a coordinated airflow, reducing airflow turbulence.
It improves the ability to handle and remove grass clippings, reduces the risk of clogging, enhances the efficiency of weeding and removal, and avoids grass clipping accumulation caused by airflow turbulence.
Smart Images
Figure CN224218924U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawnmower technology, and in particular to a blade structure and a lawnmower. Background Technology
[0002] Traditional cutter discs typically employ a single-chamber design, utilizing the airflow generated by high-speed rotating blades to transport grass clippings to the collection container. However, when dealing with high volumes of grass or wet clippings, this type of cutter disc often experiences turbulent airflow within the chamber, leading to clipping retention, accumulation, and even blockages, severely impacting operational efficiency.
[0003] To improve the grass clipping processing capacity, a dual-cavity design for zoned grass clipping processing is currently adopted. However, in actual application, due to the proximity of the two cavities and the interaction of airflow, grass clippings are still prone to turbulent interference near the discharge port, causing the airflows of the two cavities to cancel each other out or collide, which in turn aggravates the problem of clogging at the discharge port. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides a blade disc structure and a lawnmower to solve the technical problem that traditional blade discs are prone to clogging in related technologies.
[0005] This utility model provides a cutter head structure, including:
[0006] The cutter head body has a first inner cavity and a second inner cavity, and a grass discharge port is provided between the first inner cavity and the second inner cavity;
[0007] The air guide assembly includes two air guide sections that are independently arranged. The two air guide sections are arranged opposite each other at both ends of the grass discharge port. Each air guide section has a first air guide surface and a second air guide surface. The first air guide surface and the second air guide surface are respectively arranged facing the first inner cavity and the second inner cavity to guide the grass clippings in the first inner cavity and the second inner cavity to the grass discharge port for discharge.
[0008] Furthermore, the cross-sections of the first inner cavity and the second inner cavity are circular.
[0009] Furthermore, the first inner cavity is tangent to the second inner cavity, and the point of tangency formed by the two is located within the straw discharge port. Furthermore, the first air guide surface has an arc-shaped structure, and its center coincides with the center of the first inner cavity; and / or
[0010] The second air guide surface has an arc-shaped structure, and its center coincides with the center of the second inner cavity.
[0011] Furthermore, one end of the first air guide surface extends into the straw discharge port, and the other end connects to the inner wall of the first inner cavity; and / or
[0012] One end of the second air guide surface extends into the grass discharge port, and the other end connects to the inner wall of the second inner cavity.
[0013] Furthermore, a chamfered structure is provided at the connection between the first air guide surface and the first inner cavity and / or at the connection between the second air guide surface and the second inner cavity.
[0014] Furthermore, the grass discharge outlet is equipped with a grass discharge pipe.
[0015] Furthermore, one end of the grass discharge pipe is connected to the grass discharge port, and the other end is inclined upwards.
[0016] Furthermore, the straw discharge pipe is a one-piece molded structure; or
[0017] The grass discharge pipe includes a first splicing part and a second splicing part, which are detachably connected and form a grass discharge channel therebetween for connecting with the grass discharge port.
[0018] This utility model also provides a lawnmower, including the blade disc structure described above.
[0019] Compared with the prior art, this utility model has the following beneficial effects: the first and second air guide surfaces of the air guide can respectively guide the airflow of the first and second inner cavities, so that the two airflows form a synergistic effect near the grass discharge port instead of opposing or canceling each other, thereby reducing the problem of grass clipping accumulation caused by airflow turbulence; at the same time, the synergistic cooperation between the two inner cavities and the two air guides increases the grass clipping processing capacity and grass discharge capacity. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the cutter head structure in one embodiment of the present invention;
[0021] Figure 2 for Figure 1 A bottom view;
[0022] Figure 3 for Figure 1 The left-side view.
[0023] Explanation of icon numbers:
[0024] 1. Cutter head body; 101. First inner cavity; 102. Second inner cavity; 103. Straw discharge port;
[0025] 2. Air guide section; 201. First air guide surface; 202. Second air guide surface;
[0026] 3. Straw discharge pipe; 301. First splicing part; 302. Second splicing part.
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.
[0029] In the embodiments of this utility model, such as Figure 1 , Figure 2 As shown, the cutter head structure includes: a cutter head body 1 and an air guide assembly; the cutter head body 1 has a first inner cavity 101 and a second inner cavity 102, and a grass discharge port 103 is provided between the first inner cavity 101 and the second inner cavity 102; the air guide assembly includes two independently arranged air guide parts 2, which are arranged opposite to each other at both ends of the grass discharge port 103, and each air guide part 2 has a first air guide surface 201 and a second air guide surface 202, which are respectively arranged facing the first inner cavity 101 and the second inner cavity 102 to guide the grass clippings in the first inner cavity 101 and the second inner cavity 102 to be discharged through the grass discharge port 103.
[0030] Specifically, in this embodiment of the invention, the blade body 1 has a first inner cavity 101 and a second inner cavity 102 for mounting two blades respectively, so that the two blades can work simultaneously in the corresponding inner cavities; compared with the single-cavity mode, the weeding efficiency is higher. Furthermore, a weed discharge port 103 is provided at the blade body 1, located between the first inner cavity 101 and the second inner cavity 102, and connected to both inner cavities, so that weeds inside the inner cavities can be discharged through the discharge port 103. In this embodiment, the discharge port 103 is located between the two inner cavities, so that weeds from both inner cavities can be discharged through the same discharge port 103, facilitating centralized discharge into the weed collection container.
[0031] In this embodiment of the invention, the air guiding assembly includes two air guiding sections 2, which are arranged opposite to each other at opposite ends of the grass discharge port 103. On the one hand, the air guiding sections 2 can reduce the overall size of the grass discharge port 103, preventing the grass discharge from being difficult or the grass clippings from clogging due to the interaction of airflows between the two inner cavities due to their proximity. On the other hand, the air guiding sections 2 can guide the grass clippings in each inner cavity into the grass discharge port 103 and discharge them from the grass discharge port 103. Specifically, the air guiding section 2 includes a first air guiding surface 201 and a second air guiding surface 202, which are respectively arranged facing the first inner cavity 101 and the second inner cavity 102. Thus, the grass clippings located in the first inner cavity 101 can be guided to the grass discharge port 103 through the first air guiding surface 201; similarly, the grass clippings located in the second inner cavity 102 can be guided to the grass discharge port 103 through the second air guiding surface 202 and discharged together through the grass discharge port 103.
[0032] This embodiment reduces the mutual influence between airflow and grass clippings in the first inner cavity 101 and the second inner cavity 102 by setting two air guides 2 at the grass discharge port 103. Furthermore, by utilizing the first air guide surface 201 and the second air guide surface 202 of the air guides 2, grass clippings that are independent of the first inner cavity 101 and the second inner cavity 102 can be guided to the same grass discharge port 103 through the corresponding air guide surfaces and finally discharged through the grass discharge port 103, thereby improving the efficiency of weeding and grass discharge and avoiding the blockage of the grass discharge port 103.
[0033] like Figure 2 As shown, in one embodiment, the cross-sections of the first inner cavity 101 and the second inner cavity 102 are circular. Specifically, in order to improve the flow efficiency of airflow within the cavity and facilitate the rapid discharge of grass clippings, this embodiment defines the cross-sections of the first inner cavity 101 and the second inner cavity 102 as circular. This reduces the frictional resistance between the airflow and the cavity wall, avoids turbulence or vortices formed in right-angled or angular areas, and thus allows the grass clippings to be pushed more smoothly towards the discharge port 103, reducing grass clipping retention or secondary accumulation caused by airflow turbulence. Simultaneously, the grass clippings can roll or slide evenly along the cavity wall under the influence of airflow, further improving the discharge efficiency. Furthermore, when the circular cross-section of the inner cavity is combined with the first air guide surface 201 and the second air guide surface 202, a continuous airflow guiding path can be formed, making the convergence of grass clippings from the cavity edge to the discharge port 103 smoother, improving its continuity and stability.
[0034] like Figure 2As shown, in one embodiment, the first inner cavity 101 and the second inner cavity 102 are tangent, and the tangent point formed by the two is located within the grass discharge port 103. Specifically, to further prevent grass clipping blockage, this embodiment makes the first inner cavity 101 externally tangent to the second inner cavity 102, so that the flow paths of the airflow and grass clippings naturally converge at the tangent point, forming a concentrated grass discharge channel. The grass discharge port 103 is directly located at the tangent point, which can avoid energy dispersion or turbulence caused by abrupt changes in the airflow path, ensuring that the airflow from the two inner cavities works together to efficiently discharge grass clippings and reduce energy consumption. At the same time, the movement path of grass clippings to the grass discharge port 103 is minimized, reducing the residence time of grass clippings in the transition area and avoiding the "blind spots" or "corners" formed by the separation or intersection of cavities in traditional dual-cavity structures, thus reducing the possibility of grass clipping accumulation. Of course, the tangential arrangement of the two inner cavities can make the dual-cavity layout more compact, reduce the overall volume of the cutter head, and maximize the use of the space in the area of the grass discharge port 103, so as to ensure grass discharge efficiency and avoid airflow dispersion or increased weight of the cutter head due to excessive distance between the cavities.
[0035] like Figure 2 As shown, in one embodiment, the first air guide surface 201 has an arc-shaped structure, and its center coincides with the center of the first inner cavity 101. Specifically, in order to guide the grass clippings in the first inner cavity 101 to the grass discharge port 103, this embodiment defines the first air guide surface 201 as an arc-shaped structure, and its center coincides with the center of the first inner cavity 101. In this way, the first air guide surface 201 and the cavity wall of the first inner cavity 101 form a continuous streamlined transition, and the centrifugal direction of the airflow rotating along the inner cavity is consistent with the guiding direction of the air guide surface, avoiding kinetic energy loss caused by abrupt changes in airflow direction and improving the grass clipping conveying efficiency. Of course, the second air guide surface 202 has an arc-shaped structure, and its center coincides with the center of the second inner cavity 102. When the first air guide surface 201 is concentric with the first inner cavity 101 and the second air guide surface 202 is concentric with the second inner cavity 102, it can form a symmetrical and independent airflow control unit with the second air guide surface 202 and the second inner cavity 102, ensuring that the direction and intensity of the two airflows are highly coordinated when they meet at the grass discharge port 103, avoiding energy loss caused by the difference in curvature of the air guide surfaces in the dual-cavity airflow, and improving the grass clipping conveying capacity.
[0036] Furthermore, such as Figure 2 As shown, in one embodiment, one end of the first air guide surface 201 extends into the grass discharge port 103, and the other end is connected to the inner wall of the first inner cavity 101. Specifically, in order to further improve the guiding effect of airflow and grass clippings, this embodiment extends one end of the first air guide surface 201 into the grass discharge port 103, and the other end is connected to the inner wall of the first inner cavity 101 (of course, the same applies to the second air guide surface 202), so as to avoid airflow turbulence caused by structural abrupt changes and ensure the stable flow of airflow and grass clippings from the inner cavity to the grass discharge port 103.
[0037] like Figure 2 As shown, in order to adapt to the structure and installation requirements of the cutter head body 1, and to eliminate flow dead zones and reduce grass clipping residue, this embodiment adopts a chamfered structure at the connection between the first air guide surface 201 and the first inner cavity 101. Of course, the chamfered structure described above can also be added at the connection between the second air guide surface 202 and the second inner cavity 102, which will not be described in detail here.
[0038] like Figure 1 , Figure 3 As shown, in one embodiment, the grass discharge port 103 is provided with a grass discharge pipe 3 for discharging grass clippings from the grass discharge port 103 into the grass collection container via the grass discharge pipe 3. Preferably, one end of the grass discharge pipe 3 is connected to the grass discharge port 103, and the other end is inclined upwards.
[0039] like Figure 3 As shown, the grass discharge pipe 3 includes a first splicing part 301 and a second splicing part 302. The first splicing part 301 and the second splicing part 302 are detachably connected, forming a grass discharge channel for communicating with the grass discharge port 103. Specifically, in order to install the grass discharge pipe 3 at the grass discharge port 103, this embodiment adopts a splicing installation method of the first splicing part 301 and the second splicing part 302. Since there is a connectable part between the two splicing parts, the connecting part can be finely adjusted to adapt to the size of the grass discharge port 103, thereby reducing the manufacturing precision of the grass discharge pipe 3. Of course, in other embodiments, the grass discharge pipe 3 can also be integrally formed with the cutter head body 1, with no connection gap between the two, to avoid the occurrence of "grass running" or "grass leakage".
[0040] This embodiment also provides a lawnmower, including the blade disc structure described above. The specific structure of the blade disc structure is as described in the above embodiment. Since this lawnmower adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A cutter head structure, characterized in that, include: The cutter head body has a first inner cavity and a second inner cavity, and a grass discharge port is provided between the first inner cavity and the second inner cavity; The air guide assembly includes two air guide sections that are independently arranged. The two air guide sections are arranged opposite each other at both ends of the grass discharge port. Each air guide section has a first air guide surface and a second air guide surface. The first air guide surface and the second air guide surface are respectively arranged facing the first inner cavity and the second inner cavity to guide the grass clippings in the first inner cavity and the second inner cavity to the grass discharge port for discharge.
2. The cutter head structure as described in claim 1, characterized in that, The cross-sections of the first inner cavity and the second inner cavity are circular.
3. The cutter head structure as described in claim 2, characterized in that, The first inner cavity is tangent to the second inner cavity, and the point of tangency formed by the two is located inside the grass discharge port.
4. The cutter head structure as described in claim 3, characterized in that, The first air guide surface has an arc-shaped structure, and its center coincides with the center of the first inner cavity; and / or The second air guide surface has an arc-shaped structure, and its center coincides with the center of the second inner cavity.
5. The cutter head structure as described in claim 4, characterized in that, One end of the first air guide surface extends into the straw discharge port, and the other end connects to the inner wall of the first inner cavity; and / or One end of the second air guide surface extends into the grass discharge port, and the other end connects to the inner wall of the second inner cavity.
6. The cutter head structure as described in claim 5, characterized in that, The connection between the first air guide surface and the first inner cavity and / or the connection between the second air guide surface and the second inner cavity is provided with a chamfered structure.
7. The cutter head structure as described in any one of claims 1-6, characterized in that, The grass discharge outlet is equipped with a grass discharge pipe.
8. The cutter head structure as described in claim 7, characterized in that, One end of the grass discharge pipe is connected to the grass discharge port, and the other end is inclined upwards.
9. The cutter head structure as described in claim 7, characterized in that, The grass discharge pipe is a one-piece molded structure; or The grass discharge pipe includes a first splicing part and a second splicing part, which are detachably connected and form a grass discharge channel therebetween for connecting with the grass discharge port.
10. A lawnmower, characterized in that, Includes the cutter head structure as described in any one of claims 1-9.