Lawn mower

Abstract

The utility model relates to a mowing machine and aims to solve the technical problem that the existing mowing machine is poor in adaptability on uneven road surfaces and damages lawns and the mowing machine. The mower comprises a shell, a mowing unit and a pull-up piece, the mowing unit and the pull-up piece are both arranged on the shell, the mowing unit comprises a bearing frame and a cutting assembly arranged on the bearing frame, and the pull-up piece is connected to the bearing frame so as to apply pull force from bottom to top to the bearing frame. The mowing machine can always bear pulling force from bottom to top when working on a lawn, and the design is beneficial for stabilizing movement of the mowing unit and further reducing pressure on the lawn; meanwhile, the bearing frame can rotate along with the terrain of the lawn, the inflexibility of a traditional rigid structure is overcome, and local compaction and damage caused by uneven pressure distribution of the lawn mower under the uneven lawn are avoided.

Description

Technical Field

[0001] The utility model relates to a lawn mower, in particular to a lawn mower that moves using a self-moving device. Background Art

[0002] The market demand for lawn mowers is growing, especially in urban residential areas, public landscape areas and large lawns. With the accelerated pace of life and people's pursuit of a convenient and efficient lifestyle, lawn mowers that can operate autonomously have become an increasingly popular choice. This type of lawn mower has the advantages of intelligent path planning and no need for manual intervention, which greatly reduces the user's workload and improves mowing efficiency.

[0003] However, existing autonomous lawn mowers still face some challenges when facing uneven roads. Users have higher requirements for the adaptability of lawn mowers on different terrains, hoping to achieve a more flexible and efficient mowing experience without compromising the quality of the lawn. Autonomous lawn mowers currently on the market often show insufficient adaptability on uneven terrains. Due to the rigid structure and the design of the fixed mowing unit, they cannot flexibly adjust the machine according to the ups and downs of the terrain. The pressure distribution of the lawn mower is uneven, resulting in the compaction of the grass in direct contact with the lawn mower, causing damage to the lawn surface and poor mowing effect; lawn mowers that work in such conditions for a long time will also be subject to unnecessary vibration and impact, which will affect the life and stability of the machine. Utility Model Content

[0004] The utility model provides a lawn mower in view of the prior art, aiming to solve the problem that the prior lawn mowers are insufficiently adaptable on uneven roads, thus damaging the lawn and the machine itself. The utility model achieves the above-mentioned purpose through the following technical solutions.

[0005] The utility model provides a lawn mower, comprising:

[0006] A shell, and a mowing unit and a pulling member both arranged on the shell, wherein the mowing unit comprises a carrier and a cutting assembly arranged on the carrier, and the pulling member is connected to the carrier to apply a pulling force from bottom to top to the carrier.

[0007] In some embodiments, the outer shell includes a back shell located at the rear side of the supporting frame, and the pulling member is disposed on the back shell.

[0008] In some embodiments, the pulling member is a tension spring, and one end of the pulling member is connected to the top of the back shell.

[0009] In some embodiments, at least two pulling members are provided, and the at least two pulling members are symmetrically distributed about the longitudinal axis of the mowing unit.

[0010] In some embodiments, the lawn mower also includes a movable component connected between the back shell and the supporting frame, the movable component includes a first rotating shaft installed on the back shell, the first rotating shaft is parallel to the width direction of the mowing unit, and the supporting frame is connected to the first rotating shaft so as to rotate up and down around the first rotating shaft.

[0011] In some embodiments, the back shell is provided with two first limit members, and the two first limit members are distributed along the rotation direction of the first rotation axis to limit the rotation amplitude of the first rotation axis to 30°.

[0012] In some embodiments, the movable component also includes a second rotating shaft, which is parallel to the length direction of the mowing unit, one end of the second rotating shaft is fixed to the supporting frame, and the other end is rotatably connected to the first rotating shaft so that the supporting frame can rotate around the second rotating shaft.

[0013] In some embodiments, the movable component further includes a bearing, an outer ring of the bearing is fixedly connected to the first rotating shaft, and an inner ring of the bearing is fixedly connected to the other end of the second rotating shaft.

[0014] In some embodiments, the outer ring of the bearing is provided with two second limit members, and the two second limit members are distributed along the rotation direction of the second rotation axis to limit the rotation amplitude of the second rotation axis to 30°.

[0015] In some embodiments, the lawn mower further comprises a self-moving device, wherein the self-moving device is detachably connected to the housing.

[0016] In some embodiments, the self-moving device includes a lifting assembly detachably connected to the back shell, the lifting assembly drives the back shell to perform a pitch movement, the support frame remains close to the grass under the action of the first rotating axis, and the tension spring expands and contracts with the pitch of the back shell.

[0017] The beneficial effects of the utility model are as follows: when the lawn mower of this embodiment is working on the lawn, the mowing unit can always be subjected to a pulling force from bottom to top, which not only helps to stabilize the movement of the mowing unit, but also further reduces the pressure on the lawn; at the same time, the support frame can rotate with the terrain of the lawn, overcoming the inflexibility of the traditional rigid structure and avoiding local compaction and damage caused by uneven pressure distribution of the lawn mower on uneven lawns. The lawn mower of this application brings users a more efficient, more stable, and more environmentally friendly mowing experience, effectively protects the quality of the lawn, and optimizes the overall mowing effect through flexible adaptability, making the lawn smoother after the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a lawn mower provided by an embodiment of the utility model is shown;

[0020] Figure 2 Shows Figure 1 A top view of the mower is provided;

[0021] Figure 3 Shows Figure 1 A schematic diagram of a lawn mower having a housing is provided;

[0022] Figure 4 A schematic diagram showing the components between the mowing unit and the back shell;

[0023] Figure 5 A schematic diagram of a lawn mower in a state of being disassembled from a mobile device is shown;

[0024] Description of Figure Numbers:

[0025] 100. Lawn mower;

[0026] 10. outer shell; 101. back shell;

[0027] 11. mowing unit; 111. carrier frame; 112. cutting assembly; 113. supporting wheel set; 12. pulling member;

[0028] 20. movable component; 201. first rotating shaft; 202. second rotating shaft; 203. bearing; 2031. outer ring; 2032. inner ring;

[0029] 30. A first limiting member;

[0030] 40. A second limiting member;

[0031] 50. Self-equipping equipment; 501. Lifting assembly. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] Please refer to Figure 5 The mowing unit 11 of the mower 100 can be easily installed on a self-moving device. The self-moving device generates a predetermined mowing path based on the mowing area set by the user. The self-moving device can be a mobile carrier such as a crawler vehicle or a wheeled vehicle that can have a mowing unit 11 installation position. The self-moving device and the mowing unit 11 are combined to form an automatic mower 100 to complete the automatic mowing work; the mowing unit 11 is used to complete the mowing operation of the predetermined area along the predetermined path generated by the self-moving device 50 under the drive of the self-moving device 50.

[0035] In the related art, the traditional lawn mower 100 has some inherent defects in design, especially when facing a lawn with large terrain undulations, its rigid connection method may cause a series of problems. First, the mowing unit 11 is usually directly and rigidly connected to the front end of the vehicle body. In the case of uneven lawn terrain, this rigid connection design may cause the support wheels of the mowing unit 11 to be unable to flexibly fit the terrain in areas with obvious height differences, which not only affects the overall cutting quality of the lawn, but may also cause the mower 100 to be subjected to strong vibrations and shocks during long-term use, thereby affecting the life and stability of the machine. The key to solving this problem lies in the flexible connection and reliable support mechanism of the mowing unit 11.

[0036] Based on this, the applicant conducted in-depth research to solve the technical problem that the existing lawn mower 100 is not adaptable enough on uneven roads, which damages the lawn and the machine itself, so as to form the technical solution of the present application.

[0037] The structure of the lawn mower 100 in the present application is described in detail below.

[0038] Please refer to Figures 1 to 3 The lawn mower 100 includes a housing 10, and a mowing unit 11 and a pulling member 12 both disposed on the housing 10. The mowing unit 11 includes a carrier 111 and a cutting assembly 112 disposed on the carrier 111. The pulling member 12 is connected to the carrier 111 to apply a pulling force from bottom to top to the carrier 111.

[0039] The housing 10 refers to an external structure that surrounds and forms a housing for the mowing unit 11, and its main function is to provide overall protection and structural support for the machine. The mowing unit 11 is located at the front end of the mower 100, and a cutting assembly 112 and a supporting wheel assembly 113 of the mowing unit 11 are fixed on a supporting frame 111, which supports the various components of the mowing unit 11.

[0040] It should be noted that the support wheel group 113 of the mowing unit 11 is in direct contact with the grass, especially when the mower 100 is turning, the grass is repeatedly crushed by the support wheel group 113 and is easily damaged. The pull-up member 12 of this embodiment is connected to the support frame 111 of the mowing unit 11, and supports the support frame 111 by applying a pulling force from bottom to top. The pulling force of the pull-up member 12 shares part of the vertical pressure from the support wheel group 113, thereby reducing the direct pressure of the support wheel group 113 on the grass. The beneficial effect of this design is that it helps to maintain the overall quality of the lawn and reduce unnecessary damage to the lawn caused by the support wheel group 113.

[0041] Please refer to Figure 1 In some embodiments, the housing 10 includes a back shell 101 located at the rear side of the carrier 111 , and the pull-up member 12 is disposed on the back shell 101 .

[0042] The back shell 101 is made of plastic or metal material, and its shape fits the rear side of the carrier 111. One end of the pull-up member 12 is arranged in the back shell 101 and connected to the carrier 111. This ensures full coverage of the mowing unit 11, reduces interference of external objects on the internal components of the mower 100, and effectively prevents the mowing unit 11 from being damaged during operation.

[0043] Please continue to refer to Figure 1 In some embodiments, the pulling member 12 is a tension spring, and one end of the pulling member 12 is connected to the top of the back shell 101.

[0044] When the pull-up member 12 is a tension spring, both ends of the tension spring have hooks, and the top of the back shell 101 is provided with a hook connector. One end of the tension spring is connected to the back shell 101 through the hook, or a connecting hole can be directly opened on the back shell 101, and one end of the hook is connected to the back shell 101 through the connecting hole, and the other end of the tension spring is connected to the support frame 111 through the hook, forming an inclined angle, so that the tension spring can generate an upward tension. The tension spring relieves the direct pressure of the support wheel group 113 on the grass through the tension from bottom to top, thereby reducing possible damage to the lawn. In addition, the presence of the tension spring also has the function of effectively alleviating the vibration and impact generated by the lawn mower 100 in operations such as uneven terrain and turning. As an elastic element, the tension spring can absorb and disperse the vibration force caused by uneven terrain and machine movement, thereby protecting the internal components of the machine from unnecessary vibration and impact. This buffering effect helps to extend the service life of the machine and improve the overall stability of the lawn mower 100.

[0045] In some embodiments, at least two pull-up members 12 are provided, and the at least two pull-up members 12 are symmetrically distributed about the longitudinal axis of the mowing unit 11 .

[0046] By means of at least two symmetrically distributed pulling members 12, the tension on the supporting frame 111 can be distributed more evenly, providing stable support. This symmetrically distributed design not only helps to improve the stability of the lawn mower 100, thereby effectively reducing damage to the lawn, but also improves the shock absorption effect of the lawn mower.

[0047] Please refer to Figure 1 and Figure 4 In some embodiments, the lawn mower 100 further includes a movable component 20 connected between the back shell 101 and the carrier 111, the movable component 20 includes a first rotating shaft 201 installed on the back shell 101, the first rotating shaft 201 is parallel to the width direction of the lawn mowing unit 11, and the carrier 111 is connected to the first rotating shaft 201 so as to rotate up and down around the first rotating shaft 201.

[0048] In the prior art, the conventional lawn mower 100 is often unable to effectively cope with the ups and downs of the terrain due to the rigid structure and the design of the fixed mowing unit 11. This rigid connection method makes it difficult for the lawn mower 100 to flexibly adapt to uneven terrain, and easily causes the height difference between the mowing unit 11 and the ground to be inconsistent, thereby affecting the cutting effect.

[0049] In addition, this rigid structure makes it difficult for the lawn mower 100 to flexibly cope with the ups and downs of the terrain, especially when facing bumpy or uneven terrain, which may cause the lawn mower 100 to have difficulty in crossing bumps, increase the resistance of the machine during operation, and reduce mowing efficiency.

[0050] In view of the above problems, the lawn mower 100 provided in the present application is designed with a movable component 20, which includes a first rotating shaft 201, which is laterally fixed to the two ends of the back shell 101 through bearings 203.

[0051] Specifically, the first rotating shaft 201 is laterally fixed at both ends of the back shell 101 through the bearing 203 seat, forming a rotatable connection point. The carrier 111 is connected to the first rotating shaft 201 so as to rotate up and down around the shaft. When the lawn mower 100 travels to a higher terrain, the movable component 20 allows the carrier 111 to rotate upward through the first rotating shaft 201. On the contrary, when the machine travels from a high terrain to a lower terrain, the carrier 111 can rotate downward, so that the mowing unit 11 can be flexibly adjusted according to the terrain, reducing the damage to the lawn caused by local pressure and ensuring the uniformity of the cutting height.

[0052] Please refer to Figure 4 In some embodiments, the back shell 101 is provided with two first limit members 30, and the two first limit members 30 are distributed along the rotation direction of the first rotation axis 201 to limit the rotation amplitude of the first rotation axis 201 to 30°.

[0053] The first stopper 30 is fixed to the back shell 101 and protrudes from the plane of the back shell 101. The two first stoppers 30 are arranged along the rotation direction of the first rotating shaft 201. At the same time, a protruding structure is adaptively arranged between the two first stoppers 30 on the first rotating shaft 201. The protruding structure swings with the rotation of the first rotating shaft 201. When the carrier 111 rotates up and down, the swing of the protruding structure is limited by the two first stoppers 30, thereby controlling the rotation amplitude to ensure that it does not exceed the range of 30°. When the lawn mower 100 is on uneven terrain or needs to perform large-scale operations, the first stopper 30 limits the excessive rotation of the carrier 111, ensuring the stability and safety of the machine.

[0054] Please refer to Figure 2 and Figure 4 The movable component 20 also includes a second rotating shaft 202, which is parallel to the length direction of the mowing unit 11, one end of the second rotating shaft 202 is fixed to the supporting frame 111, and the other end is rotatably connected to the first rotating shaft 201, so that the supporting frame 111 can rotate around the second rotating shaft 202.

[0055] It can be understood that in order to better adapt to the terrain of the lawn, in addition to the rotation in the up and down direction relative to the back shell 101, the lawn mower 100 is further designed with a degree of freedom of movement perpendicular to the first rotation axis 201, so as to more comprehensively adapt to the ups and downs of the lawn terrain. To this end, the second rotation axis 202 is set parallel to the length direction of the mowing unit 11, that is, perpendicular to the direction of the first rotation axis 201. One end of the second rotation axis 202 is firmly fixed to the carrier 111, ensuring a firm connection with the overall structure of the lawn mower 100; at the same time, the other end is rotatably connected to the first rotation axis 201, and the mowing unit 11 can deflect in the left and right directions with the second rotation axis 202 as the rotation center. In this way, when the lawn mower 100 is traveling on the lawn, not only can the mowing unit 11 be flexibly adjusted in the up and down directions to adapt to terrains of different heights, but also through the left and right deflection of the second rotating shaft 202, the lawn mower 100 can effectively adapt to the ups and downs of the lawn in the left and right directions. This makes the lawn mower 100 more flexible in operation, can better fit the actual shape of the lawn, and improves the overall mowing effect.

[0056] Please refer to Figure 4 In some embodiments, the movable component 20 further includes a bearing 203 , an outer ring 2031 of the bearing 203 is fixedly connected to the first rotating shaft 201 , and an inner ring 2032 of the bearing 203 is fixedly connected to the other end of the second rotating shaft 202 .

[0057] The bearing 203 has an outer ring 2031 and an inner ring 2032. The middle of the first rotating shaft 201 has a docking surface for fixing the bearing 203. The outer ring 2031 of the bearing 203 is fixed to the first rotating shaft 201 through the docking surface, and the second rotating shaft 202 is fixed to the inner ring 2032 of the bearing 203 through an interference fit. The first rotating shaft 201 and the second rotating shaft 202 are connected together through the bearing 203.

[0058] Please continue to refer to Figure 4 In some embodiments, the outer ring 2031 of the bearing 203 is provided with two second limit members 40, and the two second limit members 40 are distributed along the rotation direction of the second rotation axis 202 to limit the rotation amplitude of the second rotation axis 202 to 30°.

[0059] In order to prevent the mowing unit 11 from excessively deflecting in the left-right direction with the second rotating shaft 202 as the rotation center, two second stoppers 40 are arranged on the outer ring 2031 of the bearing 203. These stoppers are distributed on the outer ring 2031 of the bearing 203 and are arranged along the rotation direction of the second rotating shaft 202. The second stopper 40 protrudes from the outer ring 2031 of the bearing 203. At the same time, another protruding structure is adaptively arranged between the two second stoppers 40 on the second rotating shaft 202, and the protruding structure swings with the rotation of the second rotating shaft 202. When the carrier 111 deflects in the left-right direction with the second rotating shaft 202 as the rotation center, the swing of the protruding structure is limited by the two second stoppers 40, thereby controlling the rotation amplitude and ensuring that it does not exceed the range of 30°, which helps to prevent the mower 100 from excessively rotating with the second rotating shaft 202 as the rotation center during operation, and ensures the stability and safety of the machine.

[0060] Please refer to Figure 5 In some embodiments, the lawn mower 100 further includes a self-moving device 50 , which is detachably connected to the housing 10 .

[0061] The self-moving device 50 is a flexible mobile vehicle body, which can be designed in a variety of ways, such as a crawler vehicle, a wheeled vehicle, etc. Such a vehicle body has good mobility and adaptability, and can move freely under different terrains and environmental conditions. The self-moving device 50 can be disassembled from the lawn mower 100 through the housing 10.

[0062] Please refer to Figure 5 The self-moving device 50 includes a lifting component 501 detachably connected to the back shell 101, and the lifting component 501 drives the back shell 101 to perform a pitching movement. The support frame 111 remains close to the grass under the action of the first rotating axis 201, and the tension spring expands and contracts with the pitching of the back shell 101.

[0063] Generally speaking, when the lawn mower 100 is turning, the support wheel group 113 of the mowing unit 11 is more likely to cause the grass to be crushed, and the damage to the grass affects the beauty of the lawn. The jacking assembly 501 of this embodiment includes an electric push rod and a jacking frame, the electric push rod is rotatably connected to the jacking frame, and the jacking frame is detachably connected to the back shell 101. When the electric push rod performs linear motion, the jacking frame drives the back shell 101 to perform pitching motion. Due to the action of the first rotating shaft 201, the support frame 111 can flexibly rotate with it to maintain a state close to the lawn. When the back shell 101 is lifted by the jacking assembly 501, the tension spring between the back shell 101 and the support frame 111 is stretched, and the support frame 111 is subjected to a greater tension from the tension spring, thereby reducing the pressure of the support wheel group 113 directly in contact with the lawn on the lawn. Therefore, the lifting of the jacking assembly 501 during the turning process can prevent the lawn from being excessively crushed. After turning, the jacking assembly 501 drops and returns to its original height.

[0064] In the description of the present utility model, it should be understood that the terms "length", "width", "depth", "up", "down", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. Terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a transmission connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0065] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present utility model, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present utility model and the features of different embodiments or examples without contradiction.

[0066] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A lawn mower, characterized in that: The utility model comprises a shell, and a mowing unit and a pulling member both arranged on the shell. The mowing unit comprises a supporting frame and a cutting assembly arranged on the supporting frame. The pulling member is connected to the supporting frame to apply a pulling force from bottom to top to the supporting frame.

2. The lawn mower according to claim 1, characterized in that The outer shell comprises a back shell located at the rear side of the supporting frame, and the pulling member is arranged on the back shell.

3. The lawn mower according to claim 2, characterized in that The pulling member is a tension spring, and one end of the pulling member is connected to the top of the back shell.

4. The lawn mower according to claim 1, characterized in that: There are at least two pull-up members, and the at least two pull-up members are symmetrically distributed about the longitudinal axis of the mowing unit.

5. The lawn mower according to claim 3, characterized in that: It also includes a movable component connected between the back shell and the supporting frame, the movable component includes a first rotating shaft installed on the back shell, the first rotating shaft is parallel to the width direction of the mowing unit, and the supporting frame is connected to the first rotating shaft so as to rotate up and down around the first rotating shaft.

6. The lawn mower according to claim 5, characterized in that The back shell is provided with two first limit members, and the two first limit members are distributed along the rotation direction of the first rotation axis to limit the rotation amplitude of the first rotation axis to 30°.

7. The lawn mower according to claim 5, characterized in that The movable component also includes a second rotating shaft, which is parallel to the length direction of the mowing unit. One end of the second rotating shaft is fixed to the supporting frame, and the other end is rotatably connected to the first rotating shaft so that the supporting frame can rotate around the second rotating shaft.

8. The lawn mower according to claim 7, characterized in that The movable component further comprises a bearing, an outer ring of the bearing is fixedly connected to the first rotating shaft, and an inner ring of the bearing is fixedly connected to the other end of the second rotating shaft.

9. The lawn mower according to claim 8, characterized in that The outer ring of the bearing is provided with two second limit members, and the two second limit members are distributed along the rotation direction of the second rotation axis to limit the rotation amplitude of the second rotation axis to 30°.

10. The lawn mower according to claim 5, characterized in that It also includes a self-moving device, which is detachably connected to the housing.

11. The lawn mower according to claim 10, characterized in that The self-moving device includes a lifting component detachably connected to the back shell, the lifting component drives the back shell to perform a pitching movement, the support frame is kept close to the grass under the action of the first rotating axis, and the tension spring expands and contracts with the pitching of the back shell.

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