Air pipe assembly and mower

Abstract

The utility model provides an air pipe assembly and a mower, the air pipe assembly is applied to the mower, the mower comprises a grass outlet, and the air pipe assembly comprises an air pipe, a mounting plate, a plug and a grass collecting box; the air pipe is provided with an inlet end and an outlet end, and the inlet end of the air pipe is communicated with the straw discharging port; the mounting plate wraps the outer side of the outlet end of the air pipe, and a first mounting point position and a second mounting point position are respectively formed at different positions of the mounting plate; the plug is detachably connected with the first mounting point position and is used for plugging the inlet end of the air pipe; the grass collecting box is detachably connected with the second mounting point position and is used for sealing the outlet end of the air pipe; wherein one of the plug and the grass collecting box is selected to be connected to the mounting plate so as to be configured into a grass chopping mode or a grass collecting mode. The technical problem that a traditional air pipe assembly is complex in structure is solved.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and in particular to a duct assembly and a lawnmower. Background Technology

[0002] Lawn mowers typically have two modes: shredding and collecting, to meet different operational needs. In shredding mode, the cut grass clippings are continuously pulverized by the blades and returned to the lawn; in collecting mode, the clippings are guided through pipes to a collection tank for centralized collection.

[0003] However, in existing technologies, switching between the two modes often relies on complex structural designs. For example, adjustable baffles, slide rails, or movable air duct components are used to achieve mode switching, and additional operating levers, locking mechanisms, or linkage mechanisms are required, resulting in complex structures and high manufacturing costs. In addition, the connection methods of the above components are prone to wear at the interfaces due to frequent switching, which can lead to problems such as grass clipping leakage or unstable installation of the box, affecting the operation effect and efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a duct assembly and a lawnmower to solve the technical problem of the complex structure of traditional duct assemblies in related technologies.

[0005] This utility model provides a duct assembly for use in a lawnmower, the lawnmower including a grass discharge port, the duct assembly comprising:

[0006] The duct has an inlet end and an outlet end, and the inlet end of the duct is connected to the straw discharge port;

[0007] The mounting plate is wrapped around the outside of the air duct outlet end, and forms a first mounting point and a second mounting point at different positions.

[0008] A plug, detachably connected to the first installation point, is used to seal the inlet end of the air duct;

[0009] The straw collection box is detachably connected to the second installation point and is used to seal the outlet end of the air duct;

[0010] The plug and the grass collection box are selectively connected to the mounting plate to be configured as either grass-crushing mode or grass-collecting mode.

[0011] Furthermore, the plug includes a baffle and a handle connected together. The baffle is used to block the inlet end of the air duct, and the end of the handle opposite to the baffle extends out of the outlet end of the air duct and is detachably connected to the first installation point.

[0012] Furthermore, the baffle is rotatably connected to the handle, and a rotating shaft is provided at the connection between the two, with a torsion spring sleeved on the rotating shaft.

[0013] Furthermore, the outer circumferential surface of the baffle is provided with a limiting protrusion, which can stay outside the grass discharge port.

[0014] Furthermore, the first mounting point consists of several hanging rings, and the handle is provided with several hooks for hanging on the hanging rings.

[0015] Furthermore, the grass collection box has a semi-enclosed structure, and the mounting plate is located on the open part of the grass collection box and can cover the open part.

[0016] Furthermore, one of the grass collection box and the second installation point is provided with a plurality of buckles, and the other is provided with a plurality of locking holes, the buckles being used to engage with the locking holes.

[0017] Furthermore, the duct includes a first section and a second section, with the inlet end and outlet end of the duct formed at the distal ends of the first section and the second section, respectively, and their proximal ends floatingly connected.

[0018] Furthermore, the first segment and the second segment are respectively provided with matching limiting posts and limiting notches, and the limiting posts can float relative to the limiting notches.

[0019] This utility model also provides a lawnmower, including the aforementioned duct assembly.

[0020] Compared with existing technologies, this utility model has the following advantages: By integrating the first and second installation points with a single mounting plate, mode switching can be completed by selectively installing either the plug or the grass collection box, reducing the number of parts and optimizing the structure to reduce manufacturing costs; at the same time, the plug and the grass collection box are set independently, and only the corresponding part in the current mode needs to be disassembled and the other part installed during use, without adjusting additional parts, realizing a quick switch between "grass chopping-grass collection" modes; furthermore, the plug can seal the inlet end of the air duct, and the mounting plate and the outlet end of the air duct are fixed in a wrapping manner. Combined with the tight connection between the grass collection box and the mounting plate, the sealing of the grass clipping conveying path is ensured in both modes, reducing the risk of leakage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the duct assembly in one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the duct assembly in the grass-shredding mode according to one embodiment of the present invention;

[0023] Figure 3This is a schematic diagram of the duct assembly in the grass collection mode according to one embodiment of the present invention;

[0024] Figure 4 This is a partial structural schematic diagram of the duct assembly in one embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the plug structure in one embodiment of the present invention.

[0026] Explanation of icon numbers:

[0027] 1. Air duct; 101. First section; 102. Second section; 103. Inlet end; 104. Outlet end; 2. Straw discharge port; 3. Mounting plate; 4. End cap; 401. Baffle; 402. Limiting protrusion; 403. Handle; 404. Rotating shaft; 405. Torsion spring; 406. Hook; 5. Straw collection box; 6. Buckle; 7. Clip hole; 8. Limiting post; 9. Limiting notch.

[0028] 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

[0029] 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.

[0030] In the embodiments of this utility model, such as Figures 1-3 As shown, the duct assembly includes: a duct 1, a mounting plate 3, a plug 4, and a grass collection box 5; the duct 1 has an inlet end 103 and an outlet end 104, and the inlet end 103 of the duct 1 is connected to the grass discharge port 2; the mounting plate 3 wraps around the outside of the outlet end 104 of the duct 1, and forms a first installation point and a second installation point at different positions; the plug 4 is detachably connected to the first installation point and is used to seal the inlet end 103 of the duct 1; the grass collection box 5 is detachably connected to the second installation point and is used to close the outlet end 104 of the duct 1; wherein, the plug 4 and the grass collection box 5 are selectively connected to the mounting plate 3 to be configured as either a grass-crushing mode or a grass-collecting mode.

[0031] Specifically, in this embodiment of the utility model, the lawnmower includes a blade disc structure, which includes a blade disc body and blades rotatably disposed on the blade disc body. The blade disc body has a grass discharge port 2, through which grass clippings cut by the blades are discharged outward.

[0032] In this embodiment of the utility model, a duct 1 is provided at the grass discharge port 2. The duct 1 has an inlet end 103 and an outlet end 104. The inlet end 103 of the duct 1 is sealed and connected to the grass discharge port 2, and its outlet end 104 extends outward; thereby forming a grass discharge channel between the grass discharge port 2 and the duct 1.

[0033] In this embodiment of the invention, to configure the duct assembly for both grass-chopping and grass-draining modes, the duct assembly also includes two independent plugs 4 and a grass collection box 5. For example, by installing plugs 4 to block the inlet end 103 of the duct 1, the grass clippings cut by the blades cannot be discharged through the duct 1 and will remain inside the blade disc. They will then be pulverized by the high-speed rotating blades and backfilled onto the lawn, forming the grass-chopping mode. Conversely, by installing the grass collection box 5 to close the outlet end 104 of the duct 1, the grass collection box 5, being a box structure, can form a closed structure with the aforementioned grass-draining channel. The grass clippings are discharged through the duct 1 into the grass collection box 5 for centralized collection, forming the grass-collecting mode.

[0034] Specifically, to facilitate the installation of the plug 4 or the grass collection box 5, this embodiment provides an installation plate 3 at the outlet end 104 of the duct 1. This installation plate 3 has a first installation point and a second installation point at different locations, allowing for detachable connection to the plug 4 and the grass collection box 5 respectively. This enables the quick installation of the other after removing one, facilitating rapid switching between the two modes. Since the plug 4 and the grass collection box 5 are independently installed, no complex drive or linkage mechanism is required for their connection, simplifying the overall structure of this duct assembly and reducing manufacturing costs. Furthermore, the independent installation allows for individual maintenance or replacement without affecting operation in the other mode. Additionally, as... Figure 1 As shown, the mounting plate 3 has an opening, the inner wall of which is adapted to the outer side of the outlet end 104 of the air duct 1, and the two are seamlessly connected; and the mounting plate 3 can wrap the outlet end 104 with its opening, thereby improving the sealing of the connection between the two and preventing the leakage of grass clippings.

[0035] This embodiment uses the independent configuration of the plug 4 and the grass collection box 5, allowing for quick installation by selecting one according to actual conditions. No additional components are needed for connection, simplifying the structure and reducing manufacturing costs. When switching modes, only the corresponding plug 4 or grass collection box 5 needs to be replaced; there is no need to replace the main structure such as the duct 1, reducing wear at the interfaces and improving the stability and service life of this component.

[0036] like Figure 4 , Figure 5As shown, in one embodiment, the plug 4 includes a baffle 401 and a handle 403 connected to each other. The baffle 401 is used to block the inlet end 103 of the air duct 1, and the handle 403 extends out of the outlet end 104 of the air duct 1 from the baffle 401 and is detachably connected to the first installation point. Specifically, to ensure that the plug 4 meets the requirements of sealing the inlet end 103 while also being installed on the mounting plate 3, this embodiment defines the plug 4 as including a baffle 401 and a handle 403. The baffle 401 is connected to one end of the handle 403, allowing the baffle 401 to extend through the duct 1 to the inlet end 103 to completely seal it. Simultaneously, the other end of the handle 403 is positioned outside the outlet end 104 of the duct 1 for detachable connection to the first mounting point on the mounting plate 3. That is, the extended handle 403 is used to operate the baffle 401 outside the duct 1, allowing it to seal the inlet end 103 or be moved out of the duct 1. Of course, to improve the sealing performance between the baffle 401 and the inlet end 103, the baffle 401 and the inlet end 103 can be press-fitted, or a corresponding sealing structure can be provided on the outer periphery of the baffle 401. In addition, since the blade generates airflow during rotation at the cutter head, the airflow can attract the baffle 401 to the inlet end 103, thereby preventing the baffle 401 from detaching from the inlet end 103 in the grass-shredding mode; and / or, the handle 403 is installed at the first mounting point of the mounting plate 3, which can also position and fix the plug 4 as a whole, preventing it from falling off.

[0037] like Figure 5 As shown, in one embodiment, the baffle 401 is rotatably connected to the handle 403, and a rotating shaft 404 is provided at the connection point. A torsion spring 405 is sleeved on the rotating shaft 404. Specifically, in order to facilitate the insertion of the baffle 401 into the air duct 1 and to block its inlet end 103, the baffle 401 and the handle 403 in this embodiment are rotatably connected, and a rotating shaft 404 is provided at the rotatable connection point to rotate around the axis of the rotating shaft 404. This allows the angle of the baffle 401 to be adjusted to fit the direction of the inner wall of the air duct 1, thereby enabling the baffle 401 to be smoothly sent into the inlet end 103. On the other hand, a torsion spring 405 is sleeved on the rotating shaft 404. When an external force is applied, the torsion spring 405 can be compressed. When the external force disappears, the torsion spring 405 returns to its original position, allowing the baffle 401 and the handle 403 to return to their original state.

[0038] like Figure 5As shown, in one embodiment, the outer peripheral surface of the baffle 401 is provided with a limiting protrusion 402, which can stay outside the grass discharge port 2. Specifically, in grass shredding mode, in order to further seal the inlet end 103 and quickly identify whether the baffle 401 is installed in place, this embodiment integrally forms a limiting protrusion 402 on the outer peripheral surface of the baffle 401. In grass shredding mode, at least part of the baffle 401 can extend into the grass discharge port 2, so that the limiting protrusion 402 abuts against the surface of the cutter head to form a sealing structure at the connection between the two. At the same time, after the limiting protrusion 402 abuts against the cutter head, the push handle 403 can be stopped. At this time, the blocking force formed can be used to determine whether the invisible baffle 401 is installed in place.

[0039] like Figure 5 As shown, in one embodiment, the first mounting point is a plurality of hanging rings, and the handle 403 is provided with a plurality of hooks 406 for hanging on the hanging rings. Specifically, in order to facilitate the detachable installation of the handle 403 on the mounting plate 3, this embodiment provides hooks 406 on the handle 403 and makes the first mounting point a matching hanging ring; thus, the detachable connection between the two can be achieved by hanging the hooks 406 on the hanging rings. Of course, multiple hooks 406 and hanging rings can be provided to improve the installation stability of the handle 403.

[0040] In one embodiment, the grass collection box 5 has a semi-enclosed structure, and the mounting plate 3 is disposed on the open portion of the grass collection box 5 and can cover the open portion. Specifically, in order to optimize the structure of the grass collection box 5 and reduce its weight, this embodiment sets the grass collection box 5 as a semi-enclosed structure, that is, one side wall of the grass collection box 5 is open; at the same time, the mounting plate 3 is installed at this location, so that the mounting plate 3 can be used as a side wall of the grass collection box 5, which not only reduces the overall weight of the grass collection box 5, but also facilitates the quick installation of the grass collection box 5 at the second mounting point of the mounting plate 3. In addition, after the grass collection box 5 and the mounting plate 3 are separated, the open side can be used as the outlet of the grass collection box 5, and the wide-diameter outlet also facilitates dumping.

[0041] like Figure 3 , Figure 4 As shown, in one embodiment, one of the grass collection box 5 and the second mounting point is provided with a plurality of buckles 6, and the other is provided with a plurality of locking holes 7. The buckles 6 are used to engage with the locking holes 7. Specifically, in order to achieve a detachable connection between the mounting plate 3 and the grass collection box 5, this embodiment provides locking holes 7 at the grass collection box 5 and buckles 6 at the second mounting point of the mounting plate 3, so that after the buckles 6 engage with the locking holes 7, the grass collection box 5 can be fixed to the mounting plate 3 to form a grass collection mode. Of course, there can be multiple buckles 6 and locking holes 7, and their positions can be interchanged, which will not be described in detail here.

[0042] like Figures 1-4 As shown, in one embodiment, the duct 1 includes a first section 101 and a second section 102. The inlet end 103 and the outlet end 104 of the duct 1 are respectively formed at the distal ends of the first section 101 and the second section 102, and their proximal ends are floatingly connected. Specifically, since the cutter head needs to move up and down according to the lawn surface during operation, in order to adapt to the movement of the cutter head, this embodiment defines the duct 1 as including a first section 101 and a second section 102, such that the distal ends of the first section 101 and the second section 102 respectively form the inlet end 103 and the outlet end 104 of the duct 1, and their proximal ends are floatingly connected; that is, the first section 101 can extend movably into the second section 102 to follow the cutter head and float up and down within the second section 102, so as to effectively fit with the cutter head.

[0043] Furthermore, such as Figure 4 As shown, in one embodiment, the first segment 101 and the second segment 102 are respectively provided with cooperating limiting posts 8 and limiting notches 9, and the limiting posts 8 can float relative to the limiting notches 9. Specifically, in order to limit the floating distance of the first segment 101, this embodiment provides limiting posts 8 and limiting notches 9 in the first segment 101 and the second segment 102 respectively, so that the limiting posts 8 can move with the first segment 101 to float relative to the limiting notches 9. Then, when the limiting posts 8 abut against the inner wall of the limiting notches 9, the first segment 101 is prevented from continuing to move. Of course, the limiting notches 9 can be semi-closed, so the length of the first segment 101 that can extend into the second segment 102 needs to be relatively long to avoid the two from separating during operation; in this way, the first segment 101 and the second segment 102 can be a segmented structure, which is convenient for assembly and disassembly. Alternatively, the limiting notch 9 is closed, and the limiting post 8 floats within the limiting notch 9 and is blocked by the opposite end face of the limiting notch 9 to restrict the limiting post 8 from continuing to move. In this case, the first segment 101 and the second segment 102 are spliced ​​structures.

[0044] This embodiment also provides a lawnmower, including the duct assembly described above. The specific structure of the duct assembly 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.

[0045] 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 duct assembly for use in a lawnmower, the lawnmower including a grass discharge outlet, characterized in that, The duct assembly includes: The duct has an inlet end and an outlet end, and the inlet end of the duct is connected to the straw discharge port; The mounting plate is wrapped around the outside of the air duct outlet end, and forms a first mounting point and a second mounting point at different positions. A plug, detachably connected to the first installation point, is used to seal the inlet end of the air duct; The straw collection box is detachably connected to the second installation point and is used to seal the outlet end of the air duct; The plug and the grass collection box are selectively connected to the mounting plate to be configured as either grass-crushing mode or grass-collecting mode.

2. The duct assembly as described in claim 1, characterized in that, The plug includes a baffle and a handle connected together. The baffle is used to block the inlet end of the air duct, and the end of the handle opposite to the baffle extends out of the outlet end of the air duct and is detachably connected to the first installation point.

3. The duct assembly as described in claim 2, characterized in that, The baffle is rotatably connected to the handle, and a rotating shaft is provided at the connection between the two, with a torsion spring sleeved on the rotating shaft.

4. The duct assembly as described in claim 2, characterized in that, The outer circumferential surface of the baffle is provided with a limiting protrusion, which can stay outside the grass discharge port.

5. The duct assembly as described in any one of claims 2-4, characterized in that, The first installation point consists of several hanging rings, and the handle is provided with several hooks for hanging on the hanging rings.

6. The duct assembly as described in claim 1, characterized in that, The grass collection box has a semi-enclosed structure, and the mounting plate is located on the open part of the grass collection box and can cover the open part.

7. The duct assembly as described in claim 1 or 6, characterized in that, One of the grass collection box and the second installation point is provided with a number of buckles, and the other is provided with a number of locking holes. The buckles are used to engage with the locking holes.

8. The duct assembly as described in claim 1, characterized in that, The duct includes a first section and a second section, with the inlet end and outlet end of the duct formed at the far ends of the first section and the second section, respectively, and their proximal ends floatingly connected.

9. The duct assembly as described in claim 8, characterized in that, The first segment and the second segment are respectively provided with matching limiting posts and limiting notches, and the limiting posts can float relative to the limiting notches.

10. A lawnmower, characterized in that, Includes the duct assembly as described in any one of claims 1-9.

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