Lawn mower

Abstract

The utility model discloses a mower. According to the mowing machine, a concave cutting space is formed in a chassis, and a guide-in opening is formed in the side wall of the chassis and used for grass clippings to enter a grass collecting bag after the grass clippings pass through the guide-in opening; the blade assembly is arranged in the cutting space; the blade assembly rotates around the rotating axis; the annular part is arranged on the base plate around the rotating axis, and the annular part is separated from the side wall of the base plate to form an airflow guide channel; the guiding piece is located in the airflow guiding channel, and the guiding piece comprises a stopping part, a flow guiding part and a connecting part which are sequentially connected in the airflow flowing direction in the airflow guiding channel; the flow guide part and the connecting part are connected with the annular piece, and the flow guide part extends in the circumferential direction of the annular piece; the stop part and the flow guide part form a preset included angle, and the stop part extends in the radial direction to penetrate through the side wall of the base plate to separate the guide-in opening from the flow guide part. Compared with the prior art, the grass chopping efficiency and the grass clippings discharging efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the field of garden tools, in particular to a lawn mower. Background Art

[0002] Lawn mowers are common gardening tools. With the continuous development of science and technology, highly intelligent automatic lawn mowers are becoming more and more common. As a gardening tool, lawn mowers can be used by users to remove weeds, mow lawns, etc.

[0003] The main body of the existing lawn mower includes a chassis, which forms a vortex channel downward, and a grass collecting port is provided on the side wall of the chassis. For the existing chassis, a part of the airflow cannot flow out directly from the outlet but circulates repeatedly in the vortex channel, thereby making the discharge efficiency of grass clippings low, and some grass clippings flowing in the vortex channel are not easy to be quickly cut by the blade, resulting in low cutting efficiency. Utility Model Content

[0004] The utility model aims to provide a lawn mower, which increases the grass chopping efficiency and the grass clippings discharge efficiency.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a lawn mower, comprising:

[0006] A chassis, wherein the chassis has a recessed cutting space, and a side wall of the chassis is provided with an inlet for grass clippings to pass through and enter a grass collecting bag;

[0007] A blade assembly, the blade assembly being disposed in the cutting space; the blade assembly rotating about a rotation axis;

[0008] an annular member, the annular member is disposed on the chassis around the rotation axis, and the annular member is separated from the side wall of the chassis to form an airflow guiding channel; and

[0009] A guide member, the guide member is located in the airflow guiding channel, and the guide member includes: a stop portion, a guide portion and a connecting portion connected in sequence along the airflow flow direction in the airflow guiding channel; the guide portion and the connecting portion are connected to the annular member, and the guide portion extends along the circumferential direction of the annular member; and the stop portion and the guide portion form a preset angle, and the stop portion radially extends through the side wall of the chassis to separate the inlet from the guide portion.

[0010] Compared with the prior art, the embodiment of the utility model is provided with a guide, which includes a stopper, a guide part and a connecting part. When the lawn mower is in the export mode, when grass clippings need to be introduced into the grass collection bag from the introduction port, the stopper can partially stop the grass clippings, thereby improving the grass clipping collection efficiency. At the same time, the guide part is connected to the stopper, so that when part of the grass clippings pass over the stopper, they can also fall on the guide part and be quickly cut by the blade, thereby increasing the grass cutting efficiency.

[0011] In one embodiment, the circular cross-sectional area of ​​the surface where the guide portion in the airflow guiding channel is located is S; the surface area of ​​the guide portion and the connecting portion extending along the annular member is S1; and the ratio of S1 to S is in the range of 1 / 5 to 1 / 3.

[0012] In one embodiment, the ratio of S1 to S is 1 / 4.

[0013] In one embodiment, along the direction of the rotation axis, the height of the cutting plane of the blade assembly from the chassis is greater than the height of the annular member from the chassis.

[0014] In one embodiment, along the direction of the rotation axis, the height of the stop portion from the chassis is smaller than the height of the annular member from the chassis.

[0015] In one embodiment, the ratio of the height of the annular member from the bottom plate to the height of the stopper from the bottom plate is in the range of 0.3 to 0.8.

[0016] In one embodiment, the ratio of the height of the annular member from the bottom plate to the height of the stopper from the bottom plate is 0.5.

[0017] In one embodiment, the guide portion is connected to the connecting portion by a bend, and the connecting portion is inclined toward the inside of the chassis.

[0018] In one embodiment, at least one of the stopper portion, the guide portion and the connecting portion is provided with a reinforcing rib.

[0019] In one embodiment, the lawn mower further comprises: a motor penetrating through the chassis and driving the blade assembly to rotate;

[0020] A baffle is provided at the inlet, and the baffle is detachably connected to the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a lawn mower according to an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the bottom structure of a lawn mower according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure in which a guide member is located in a chassis according to an embodiment of the utility model;

[0024] Figure 4 It is a cross-sectional view of a lawn mower according to one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0026] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0027] The following will be combined with the accompanying drawings to describe the various embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0028] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0029] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0030] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0031] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0032] This example relates to a lawn mower 100. Figure 1 and Figure 2 As shown, the lawn mower 100 includes: a body 1, a fan 2, a blade assembly 3 and a motor 4. The motor 4 is mounted on the body 1, and the fan 2 and the blade assembly 3 are arranged on a chassis 7 at the bottom of the body 1, and the blade assembly 3 is located on the side of the fan 2 away from the body 1. The blade assembly 3 is fixedly connected to the rotating shaft of the fan 2 and the motor 4 through a locking member, and the locking member can be a bolt or other conventional mechanical fixing member. The blade assembly 3 can be formed by two overlapping and fixed blades. A controller is arranged on the body 1, and the controller controls the motor 4 to rotate the fan 2 and the blade assembly 3. The lawn mower 100 also includes an operating rod 5 and a self-propelled mechanism, and the self-propelled mechanism includes a walking wheel 61 and a driving motor for driving the walking wheel 61 to move. A speed knob is arranged on the operating rod 5, and a signal is sent to the controller through the speed knob. The controller includes a PCB control board, so that the controller controls the driving motor to make the walking wheel 61 move. When the lawn mower 100 is working, the operator can hold the handle on the operating rod 5 and push the lawn mower 100 to move.

[0033] Specifically, Figure 2 and Figure 3 As shown, a chassis 7 is provided at the bottom of the body 1, and the chassis 7 has a recessed cutting space, and an inlet 70 for grass clippings to pass through and enter the grass collecting bag is provided on the side wall of the chassis 7. The inlet 70 is shielded by a baffle. When the lawn mower 100 is in the export mode, the baffle is removed from the chassis 7, and the inlet 70 is disassembled to facilitate grass clippings to enter the grass collecting bag. In the grass chopping mode, the baffle can be installed on the side wall of the chassis 7 to shield the inlet 70. The blade assembly 3 is disposed in the cutting space, and the blade assembly 3 rotates around the rotation axis P. The lawn mower 100 also includes a ring 8 and a guide 9. As shown Figure 2 , Figure 3 and Figure 4 As shown, the annular member 8 is arranged on the chassis 7 around the rotation axis P, and the annular member 8 is separated from the side wall of the chassis 7 to form an airflow guide channel 73. The arrow A in the guide channel is the rotation direction of the blade assembly 3, that is, the effective airflow movement direction is formed when the blade assembly 3 rotates. The guide member 9 is located in the airflow guide channel 73, and the guide member 9 includes: a stopper 91, a guide portion 92 and a connecting portion 93 connected in sequence along the airflow flow direction in the airflow guide channel 73, the guide portion 92 and the connecting portion 93 are connected to the annular member 8, and the guide portion 92 extends along the circumference of the annular member 8; and the stopper 91 and the guide portion 92 form a preset angle, and the stopper 91 radially extends through the side wall of the chassis 7 to separate the inlet 70 from the guide portion 92, which is used to partially stop the grass clippings.

[0034] It is not difficult to find from the above contents that, since the guide member 9 is provided, the guide member 9 includes a stopper 91, a guide part 92 and a connecting part 93. When the lawn mower 100 is in the export mode, when grass clippings need to be introduced into the grass collecting bag from the introduction port 70, the stopper 91 can partially stop the grass clippings, thereby improving the grass clippings collection efficiency. At the same time, the guide part 92 is connected to the stopper 91, so that when part of the grass clippings pass over the stopper 91, they can also fall on the guide part 92 and be quickly cut by the blade, thereby increasing the grass cutting efficiency.

[0035] The implementation details of this embodiment are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0036] Specifically, in this embodiment, Figure 3 and Figure 4 As shown, the stopper 91 is nearly vertically arranged, that is, parallel to the direction of the rotation axis, and the stopper 91 partially extends outside the chassis 7 and is inserted into the fuselage 1, and the stopper 91 can be abutted against the bottom of the chassis 7. The annular member 8 is arranged around the rotation axis as the center, and the guide portion 92 is horizontally arranged in the chassis 7, connected to the annular member 8 and the side wall of the chassis 7. The angle between the stopper 91 and the guide plate is not limited to the vertical angle in this embodiment, and can also be other angles.

[0037] Furthermore, if Figure 2 As shown, the air guide portion 92 is connected to the connecting portion 93 by bending, and the connecting portion 93 is inclined toward the inside of the chassis 7. That is, it is inclined toward the direction away from the blade assembly 3.

[0038] In addition, if Figure 2 As shown, at least one of the stopper 91, the guide 92 and the connecting portion 93 is provided with a reinforcing rib 90. The reinforcing rib 90 is provided to increase the strength, reduce the damage to the guide member 9 when hard objects enter the chassis 7, and increase the service life.

[0039] In addition, if Figure 3 As shown, the circular cross-sectional area of ​​the surface where the guide portion 92 is located in the airflow guiding channel 73 is S, the surface area of ​​the guide portion 92 and the connecting portion 93 extending along the annular member 8 is S1, and the ratio of S1 to S is in the range of 1 / 5 to 1 / 3. Optionally, the ratio of S1 to S is 1 / 4.

[0040] Furthermore, if Figure 4 As shown, along the direction of the rotation axis P, the height L1 of the cutting plane of the blade assembly 3 from the chassis 7 is greater than the height L2 of the ring member 8 from the chassis 7 .

[0041] In addition, if Figure 4 As shown, along the direction of the rotation axis P, the height L3 of the stopper 91 from the chassis 7 is smaller than the height L2 of the ring member 8 from the chassis 7 .

[0042] Furthermore, if Figure 4 As shown, the ratio of the height L2 of the ring 8 from the chassis 7 to the height L3 of the stopper 91 from the chassis 7 is in the range of 0.3 to 0.8. This is conducive to forming the airflow guide channel 73 on the one hand, and on the other hand, the grass clippings entering the guide portion 92 can fall quickly and be re-cut by the blade, thereby increasing the cutting efficiency and improving the grass chopping ability. The height of the ring 8 from the chassis 7 is the height of the ring 8 from the bottom of the chassis 7, and the bottom of the chassis 7 is the surface facing the top of the fuselage 1. The height of the stopper 91 from the chassis 7 is also the height from the bottom of the chassis 7.

[0043] Alternatively, if Figure 4 As shown, the ratio of the height L2 of the ring 8 from the chassis 7 to the height L3 of the stopper 91 from the chassis 7 is 0.5. The ratio of the height L2 of the ring 8 from the chassis 7 to the height L3 of the stopper 91 from the chassis 7 can also be 0.6 or 0.7.

[0044] Preferred embodiments of the present invention have been described in detail above, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0045] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0046] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A lawn mower, characterized in that: include: A chassis, wherein the chassis has a recessed cutting space, and a side wall of the chassis is provided with an inlet for grass clippings to pass through and enter a grass collecting bag; A blade assembly, the blade assembly being disposed in the cutting space; the blade assembly rotating about a rotation axis; an annular member, the annular member is disposed on the chassis around the rotation axis, and the annular member is separated from the side wall of the chassis to form an airflow guiding channel; as well as A guide member, the guide member is located in the airflow guiding channel, and the guide member includes: a stop portion, a guide portion and a connecting portion connected in sequence along the airflow flow direction in the airflow guiding channel; the guide portion and the connecting portion are connected to the annular member, and the guide portion extends along the circumferential direction of the annular member; and the stop portion and the guide portion form a preset angle, and the stop portion radially extends through the side wall of the chassis to separate the inlet from the guide portion.

2. The lawn mower according to claim 1, characterized in that The circular cross-sectional area of ​​the surface where the guide portion in the airflow guiding channel is located is S; the surface area of ​​the guide portion and the connecting portion extending along the annular member is S1; the ratio of S1 to S is in the range of 1 / 5 to 1 / 3.

3. The lawn mower according to claim 2, characterized in that S1 and S account for 1 / 4.

4. The lawn mower according to claim 1, characterized in that: Along the direction of the rotation axis, the height of the cutting plane of the blade assembly from the chassis is greater than the height of the annular member from the chassis.

5. The lawn mower according to claim 1, characterized in that Along the direction of the rotation axis, the height of the stopper from the chassis is smaller than the height of the annular member from the chassis.

6. The lawn mower according to claim 5, characterized in that The ratio of the height of the annular member from the chassis to the height of the stopper from the chassis is in the range of 0.3 to 0.

8.

7. The lawn mower according to claim 6, characterized in that The ratio of the height of the annular member from the chassis to the height of the stopper from the chassis is 0.

5.

8. The lawn mower according to claim 1, characterized in that The guide portion is connected to the connecting portion in a bent manner, and the connecting portion is inclined toward the inside of the chassis.

9. The lawn mower according to claim 1, characterized in that At least one of the stopper portion, the guide portion and the connecting portion is provided with a reinforcing rib.

10. The lawn mower according to claim 1, characterized in that The lawn mower further comprises: a motor penetrating through the chassis and driving the blade assembly to rotate; A baffle is provided at the inlet, and the baffle is detachably connected to the chassis.

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