Lawn mower

Abstract

This application provides a lawnmower to solve the problem that the cutting component is difficult to lift in time when it accidentally collides with an obstacle. The lawnmower provided by this application includes: a cutting component, a first support, a first rotating member, a second support, and a lifting drive assembly. The cutting component is connected to the first support. The first rotating member includes a first part, a second part, and a third part. The first part is rotatably connected to the first support, the second part is rotatably connected to the second support, and the third part is located between the first part and the second part. The lifting drive assembly is connected to the second support and has a power output section. The third part is supported by the power output section, which is used to drive the third part to lift and lower, so that the first rotating member rotates relative to the second support and drives the first support and the cutting component to lift and lower.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and more particularly to a lawnmower. Background Technology

[0002] During the mowing process, lawnmowers need to be raised and lowered to adjust the height of the cutting assembly, thereby adjusting the amount of grass trimmed. In related technologies, the lifting drive is directly connected to the cutting assembly. If the cutting assembly accidentally bumps into an obstacle, it may be difficult to raise in time, potentially causing damage to the cutting assembly. Utility Model Content

[0003] This application provides a lawnmower to solve the problem that the cutting component is difficult to lift in time when it accidentally bumps into an obstacle.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] The lawnmower provided in this application includes: a cutting assembly, a first bracket, a first rotating component, a second bracket, and a lifting drive assembly; the cutting assembly is connected to the first bracket, the first rotating component includes a first part, a second part, and a third part, the first part is rotatably connected to the first bracket, the second part is rotatably connected to the second bracket, and the third part is located between the first part and the second part; the lifting drive assembly is connected to the second bracket, the lifting drive assembly is provided with a power output part, the third part is supported by the power output part, and the power output part is used to drive the third part to lift and lower, so that the first rotating component rotates relative to the second bracket, and drives the first bracket and the cutting assembly to lift and lower.

[0006] Optionally, the cutting assembly includes a cutting blade, a cutting blade driver, and a cover; both the cutting blade driver and the cover are connected to the first bracket, the cutting blade driver is connected to the cutting blade, the cutting blade is disposed in the area enclosed by the cover, one end of the cover is provided with a feed inlet, and a guide portion is provided on the side of the feed inlet of the cover, and the bottom surface of the guide portion gradually rises in the opening direction of the feed inlet.

[0007] Optionally, the lifting drive assembly includes a rotary motor, a screw, and a threaded mating component. The rotary motor is driven by the screw, the screw is threadedly connected to the threaded mating component, and the power output part is located on the threaded mating component.

[0008] Optionally, the second bracket is provided with a vertically extending guide groove, and the power output part is a bearing boss provided on the threaded mating part. The bearing boss is embedded in the guide groove so that the screw is threadedly connected to the threaded mating part.

[0009] Optionally, the screw has a helical protrusion, the threaded fitting has a helical groove, the helical protrusion is embedded in the helical groove, and the helical protrusion includes a first end and a second end, with the second end positioned higher than the first end.

[0010] Optionally, the screw is further provided with a stop portion, which is connected to the first end and is used to abut against the threaded engagement member when the threaded engagement member is located at the first end.

[0011] Optionally, the lifting drive assembly further includes a first gear and a second gear, the rotary motor is driven by the first gear, the second gear is coaxially connected to the screw, and the first gear and the second gear mesh.

[0012] Optionally, the screw is provided with a rotation operation interface for connecting to a rotary wrench.

[0013] Optionally, the lawnmower further includes a second rotating component, which includes a fourth part and a fifth part; the fourth part is rotatably connected to the first bracket, and the fifth part is rotatably connected to the second bracket; the fourth part is located below the first part, and the fifth part is located below the second part; the distance between the fourth part and the first part is equal to the distance between the fifth part and the second part.

[0014] Optionally, the lawnmower further includes a tension spring, which has a third end and a fourth end. The third end is connected to the second bracket, and the fourth end is connected to the second rotating member. The position of the third end is higher than the position of the fourth end.

[0015] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0016] In the embodiments of this application, a first portion of the first rotating member is rotatably connected to a first bracket, and a second portion of the first rotating member is rotatably connected to a second bracket. Further, a third portion located between the first and second portions is supported by the power output section of the lifting drive assembly. Thus, the first rotating member, the power output section, and the first bracket form a lever-type structure.

[0017] Thus, during the upward movement of the power output section, the first rotating component rotates relative to the second support, and the first part of the first rotating component rises, thereby driving the first support and the cutting assembly to rise. During the downward movement of the power output section, the first support and the cutting assembly descend under the action of gravity.

[0018] When the cutting component comes into contact with an obstacle below, the obstacle will lift the cutting component up, and the third part of the first rotating member will move upward relative to the power output part and separate from the power output part. Therefore, since the cutting component can be lifted up by the obstacle when it comes into contact with it, it avoids direct collision with the obstacle, thus preventing the cutting component from being damaged by hitting the obstacle.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a lawnmower provided in an embodiment of this application;

[0022] Figure 2 In order to be in Figure 1 The provided lawnmower conceals components such as the chassis and walking mechanism.

[0023] Figure 3 A schematic diagram of a lawnmower including a cutting assembly, a first bracket, a first rotating component, a second rotating component, a second bracket, a lifting drive assembly, and a tension spring, provided for embodiments of this application;

[0024] Figure 4 A schematic diagram of a lifting drive assembly provided in an embodiment of this application;

[0025] Figure 5 A right view of a second bracket and a lifting drive assembly provided in an embodiment of this application;

[0026] Figure 6 This is a top view of a screw provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1- Lawn mower;

[0029] 100-Cutting assembly; 110-Cutting blade; 120-Cutting blade driver; 130-Cover; 131-Feed inlet; 132-Guide section;

[0030] 200 - First stent;

[0031] 300 - First rotating component; 310 - First part; 320 - Second part; 330 - Third part;

[0032] 400 - Second bracket; 410 - Guide groove;

[0033] 500-Lifting drive assembly; 510-Power output unit; 520-Rotary motor; 530-Screw; 531-Helical protrusion; 5311-First end; 5312-Second end; 532-Stop part; 533-Rotation operation interface; 540-Threaded mating part; 541-Helical groove; 550-First gear; 560-Second gear;

[0034] 600 - Second rotating component; 610 - Fourth part; 620 - Fifth part;

[0035] 700 - Tension spring; 710 - Third end; 720 - Fourth end;

[0036] 800-chassis;

[0037] 900 - Walking mechanism. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Furthermore, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application specification may have been selected by the applicant at his or her own discretion, and their detailed meanings are explained in the relevant sections of this description.

[0041] Furthermore, this application is required to be understood not only through the actual terms used, but also through the meaning implied by each term.

[0042] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0043] This application provides a lawnmower. (See reference...) Figures 1 to 6 The lawnmower 1 provided in this application embodiment includes: a cutting component 100, a first bracket 200, a first rotating component 300, a second bracket 400, and a lifting drive component 500.

[0044] The cutting assembly 100 is connected to the first support 200. The first rotating member 300 includes a first part 310, a second part 320, and a third part 330. The first part 310 is rotatably connected to the first support 200, and the second part 320 is rotatably connected to the second support 400. The third part 330 is located between the first part 310 and the second part 320. The lifting drive assembly 500 is connected to the second support 400. The lifting drive assembly 500 is provided with a power output part 510, and the third part 330 is supported on the power output part 510. The power output part 510 is used to drive the third part 330 to lift and lower, so that the first rotating member 300 rotates relative to the second support 400, and drives the first support 200 and the cutting assembly 100 to lift and lower.

[0045] In this manner, in the embodiments of this application, the first portion 310 of the first rotating member 300 is rotatably connected to the first bracket 200, and the second portion 320 of the first rotating member 300 is rotatably connected to the second bracket 400. Further, the third portion 330 located between the first portion 310 and the second portion 320 is supported by the power output portion 510 of the lifting drive assembly 500. Thus, the first rotating member 300, the power output portion 510, and the first bracket 200 form a lever-type structure.

[0046] Thus, during the upward movement of the power output unit 510, the first rotating member 300 rotates relative to the second support 400, and the first part 310 of the first rotating member 300 rises, thereby driving the first support 200 and the cutting assembly 100 to rise. During the downward movement of the power output unit 510, the first support 200 and the cutting assembly 100 descend under the action of gravity.

[0047] When the cutting assembly 100 comes into contact with an obstacle below, the obstacle will lift the cutting assembly 100, and the third part 330 of the first rotating member 300 will move upward relative to the power output part 510 and separate from the power output part 510. Therefore, since the cutting assembly 100 can be lifted by the obstacle when it comes into contact with it, it avoids direct collision with the obstacle, thus preventing the cutting assembly 100 from being damaged by hitting the obstacle.

[0048] refer to Figures 1 to 3 In some embodiments, the cutting assembly 100 includes a cutting blade 110, a cutting blade driver 120, and a cover 130. Both the cutting blade driver 120 and the cover 130 are connected to the first bracket 200, with the cutting blade driver 120 connected to the cutting blade 110. The cutting blade 110 is disposed within the area enclosed by the cover 130. One end of the cover 130 has a feed inlet 131, and a guide portion 132 is provided on the side where the feed inlet 131 is located. The bottom surface of the guide portion 132 gradually rises in the opening direction of the feed inlet 131.

[0049] For example, the feed inlet 131 of the cover 130 faces left. As the lawnmower 1 moves to the left, the lawn enters the area where the cutting blade 110 is located from left to right relative to the feed inlet 131 of the cover 130. The upper end of the lawn is then cut by the rotating cutting blade 110. Furthermore, a guide portion 132 is provided on the left side of the cover 130, and the bottom surface of the guide portion 132 gradually rises from right to left. Therefore, when the cover 130 comes into contact with an obstacle, the obstacle moves from left to right relative to the guide portion 132, causing the obstacle to lift the cover 130 via the guide portion 132, thereby causing the cutting assembly 100 to rise upwards and avoid the obstacle.

[0050] In some embodiments, the lifting drive assembly 500 includes a rotary motor 520, a screw 530, and a threaded engagement member 540. The rotary motor 520 is driven to the screw 530, and the screw 530 is threadedly engaged with the threaded engagement member 540. A power output portion 510 is disposed on the threaded engagement member 540. In other words, a portion of the threaded engagement member 540 forms the power output portion 510. Thus, because the threaded connection has a self-locking effect, the threaded engagement of the screw 530 with the threaded engagement member 540 prevents the threaded engagement member 540 from falling down when the lifting drive assembly 500 stops operating, thereby preventing the cutting assembly 100 from falling down on its own.

[0051] In some embodiments, the second bracket 400 is provided with a vertically extending guide groove 410. The power output part 510 is a bearing boss provided on the threaded mating part 540, and the bearing boss is embedded in the guide groove 410. In this way, by the bearing boss being embedded in the guide groove 410, the threaded mating part 540 can be guided to move up and down by the groove walls on both sides of the guide groove 410, so that the threaded mating part 540 can move up and down relatively smoothly under the guidance of the guide groove 410.

[0052] In some embodiments, the screw 530 is provided with a helical protrusion 531, and the threaded mating part 540 is provided with a helical groove 541, with the helical protrusion 531 embedded in the helical groove 541. In this way, the screw 530 and the threaded mating part 540 are threadedly connected by the helical protrusion 531 and the helical groove 541.

[0053] Furthermore, the helical protrusion 531 includes a first end 5311 and a second end 5312. The second end 5312 is positioned higher than the first end 5311. Thus, when the threaded engagement member 540 moves relative to the helical protrusion 531 from the first end 5311 to the second end 5312, the helical protrusion 531 will drive the threaded engagement member 540 to rise. When the threaded engagement member 540 moves relative to the helical protrusion 531 from the second end 5312 to the first end 5311, the helical protrusion 531 will drive the threaded engagement member 540 to descend.

[0054] In some embodiments, the screw 530 further includes a stop portion 532. The stop portion 532 is connected to the first end 5311. The stop portion 532 is used to abut against the threaded engagement member 540 when the threaded engagement member 540 is located at the first end 5311. In other words, when the threaded engagement member 540 moves along a helical trajectory relative to the screw 530 from the second end 5312 towards the first end 5311, the threaded engagement member 540 will move at most to the position of abutting against the threaded engagement member 540 before stopping its movement.

[0055] In this way, by the stop portion 532 abutting against the threaded engagement part 540 when the threaded engagement part 540 is located at the first end 5311, the threaded engagement part 540 is restricted from moving to the lower limit position and will not descend further, thereby avoiding the problem of the cutting assembly 100 colliding with the ground due to excessive descent of the threaded engagement part 540.

[0056] In some embodiments, the lifting drive assembly 500 further includes a first gear 550 and a second gear 560. A rotary motor 520 is driven by the first gear 550, and the second gear 560 is coaxially connected to the screw 530, with the first gear 550 and the second gear 560 meshing. Thus, the lifting drive assembly 500 can drive the first gear 550 to rotate, the first gear 550 drives the second gear 560 to rotate, and the second gear 560 drives the screw 530 to rotate, thereby driving the threaded engagement member 540 to rise and fall.

[0057] In some embodiments, the screw 530 is provided with a rotation operation interface 533. The rotation operation interface 533 is used to connect to a rotary wrench. Exemplarily, the rotation operation interface 533 is a slotted groove provided at the end of the screw 530. For example, the rotary wrench is a slotted screwdriver, which can be driven by inserting the slotted screwdriver into the slotted groove, thereby causing the screw 530 to rotate. In this way, during the assembly process, the second gear 560 can be rotated synchronously by rotating the screw 530, and the second gear 560 can be smoothly engaged with the first gear 550 by adjusting the second gear 560 to a suitable angle.

[0058] In some embodiments, the lawnmower 1 further includes a second rotating member 600. The second rotating member 600 includes a fourth portion 610 and a fifth portion 620. The fourth portion 610 is rotatably connected to the first support 200, and the fifth portion 620 is rotatably connected to the second support 400. The fourth portion 610 is located below the first portion 310, and the fifth portion 620 is located below the second portion 320. The distance between the fourth portion 610 and the first portion 310 is equal to the distance between the fifth portion 620 and the second portion 320. Thus, by adding the second rotating member 600, the stability of the lifting and lowering of the first support 200 relative to the second support 400 can be improved.

[0059] For example, the first rotating member 300 includes a first side rod portion, a second side rod portion, and a first connecting rod portion. The first side rod portion and the second side rod portion are spaced apart, and both ends of the first connecting rod portion are fixedly connected to the first side rod portion and the second side rod portion, respectively. One end of the first side rod portion is rotatably connected to the first bracket 200, and the other end is rotatably connected to the second bracket 400. One end of the second side rod portion is rotatably connected to the first bracket 200, and the other end is rotatably connected to the second bracket 400.

[0060] For example, the second rotating member 600 includes a third side rod, a fourth side rod, and a second connecting rod. The third side rod and the fourth side rod are spaced apart, and both ends of the second connecting rod are fixedly connected to the third side rod and the fourth side rod, respectively. One end of the third side rod is rotatably connected to the first bracket 200, and the other end is rotatably connected to the second bracket 400. One end of the fourth side rod is rotatably connected to the first bracket 200, and the other end is rotatably connected to the second bracket 400.

[0061] In some embodiments, the axis of rotation of the first portion 310 of the first rotating member 300 relative to the first support 200 is the first axis of rotation, and the axis of rotation of the second portion 320 of the first rotating member 300 relative to the second support 400 is the second axis of rotation. The axis of rotation of the fourth portion 610 of the second rotating member 600 relative to the first support 200 is the third axis of rotation, and the axis of rotation of the fifth portion 620 of the second rotating member 600 relative to the second support 400 is the fourth axis of rotation. The first, second, third, and fourth axes of rotation are parallel to each other. Further, the first, second, third, and fourth axes of rotation are all parallel to the horizontal direction. The first, second, third, and fourth axes of rotation are arranged in a parallelogram. The second axis of rotation is located below the first axis of rotation, and the fourth axis of rotation is located below the third axis of rotation.

[0062] It should be noted that the “third part 330 is located between the first part 310 and the second part 320” described above means that a connecting line is formed by connecting the first rotating shaft and the second rotating shaft, a first vertical plane is made at the first rotating shaft that is perpendicular to the connecting line and passes through the first rotating shaft, a second vertical plane is made at the second rotating shaft that is perpendicular to the connecting line and passes through the second rotating shaft, and the third part 330 is located between the first vertical plane and the second vertical plane.

[0063] In some embodiments, the lawnmower 1 further includes a tension spring 700. The tension spring 700 includes a third end 710 and a fourth end 720. The third end 710 is connected to the second bracket 400, and the fourth end 720 is connected to the second rotating member 600. The third end 710 is positioned higher than the fourth end 720. In this way, the tension spring 700 can apply an upward force to the first bracket 200 via the second rotating member 600 to counteract part of the weight of the first bracket 200 and the cutting assembly 100, thereby reducing the lifting force that the lifting drive assembly 500 needs to apply to the third portion 330 of the first rotating member 300.

[0064] It should be noted that in other embodiments, the lifting drive assembly 500 may also include a linear actuator such as a linear motor or a hydraulic cylinder capable of outputting linear driving force. In this way, the third part 330 of the first rotating member 300 can be directly driven to rise and fall using a linear actuator, without the need for transmission mechanisms such as the screw 530 and the threaded mating part 540, thus simplifying the structure of the lifting drive assembly 500.

[0065] Alternatively, the lifting drive assembly 500 may also include a rotary motor 520 and a cam. The cam abuts against the power output section 510, so that as the rotary motor 520 drives the cam to rotate, the cam lifts the power output section 510 or lowers the power output section 510.

[0066] In some embodiments, the second support 400 may include a housing and a cover. The rotary motor 520 and the screw 530 may be housed within the housing. A threaded engagement member 540 is partially located within the housing and partially exposed outside the housing via a guide groove 410. The portion of the threaded engagement member 540 exposed outside the housing forms a power output section 510, thereby allowing the third portion 330 of the first rotating member 300 to be lifted and lowered by the power output section 510.

[0067] In some embodiments, the lawnmower 1 further includes a chassis 800 and a walking mechanism 900. A second support 400 is fixedly connected to the chassis 800. The chassis 800 is supported by the walking mechanism 900. Exemplarily, the walking mechanism 900 consists of wheels. An operator can manually push the lawnmower 1 to move. Alternatively, the lawnmower 1 may also include a walking drive assembly. The walking drive assembly is driven by the wheels and can drive the lawnmower 1 to move.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the embodiments of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lawnmower, characterized in that, include: The cutting assembly (100), the first bracket (200), the first rotating component (300), the second bracket (400), and the lifting drive assembly (500) are included. The cutting assembly (100) is connected to the first bracket (200). The first rotating member (300) includes a first part (310), a second part (320), and a third part (330). The first part (310) is rotatably connected to the first bracket (200), the second part (320) is rotatably connected to the second bracket (400), and the third part (330) is located between the first part (310) and the second part (320). The lifting drive assembly (500) is connected to the second bracket (400). The lifting drive assembly (500) is provided with a power output part (510). The third part (330) is supported on the power output part (510). The power output part (510) is used to drive the third part (330) to lift and lower, so that the first rotating member (300) rotates relative to the second bracket (400), and drives the first bracket (200) and the cutting assembly (100) to lift and lower.

2. The lawnmower according to claim 1, characterized in that, The cutting assembly (100) includes a cutting blade (110), a cutting blade driver (120), and a cover (130). The cutting blade driver (120) and the cover (130) are both connected to the first bracket (200). The cutting blade driver (120) is connected to the cutting blade (110). The cutting blade (110) is located in the area enclosed by the cover (130). One end of the cover (130) is provided with a feed inlet (131). A guide part (132) is provided on the side of the feed inlet (131) of the cover (130). In the opening direction of the feed inlet (131), the bottom surface of the guide part (132) gradually rises.

3. The lawnmower according to claim 1, characterized in that, The lifting drive assembly (500) includes a rotary motor (520), a screw (530), and a threaded engagement component (540). The rotary motor (520) is driven to the screw (530), and the screw (530) is threaded to the threaded engagement component (540). The power output part (510) is located on the threaded engagement component (540).

4. The lawnmower according to claim 3, characterized in that, The second bracket (400) is provided with a vertically extending guide groove (410), and the power output part (510) is a bearing boss provided on the threaded fitting (540), and the bearing boss is embedded in the guide groove (410).

5. The lawnmower according to claim 3, characterized in that, The screw (530) is provided with a helical protrusion (531), and the threaded fitting (540) is provided with a helical groove (541). The helical protrusion (531) is embedded in the helical groove (541) so that the screw (530) and the threaded fitting (540) are threadedly connected. The spiral protrusion (531) includes a first end (5311) and a second end (5312), with the second end (5312) positioned higher than the first end (5311).

6. The lawnmower according to claim 5, characterized in that, The screw (530) is also provided with a stop (532), which is connected to the first end (5311). The stop (532) is used to abut against the threaded mating part (540) when the threaded mating part (540) is located at the first end (5311).

7. The lawnmower according to claim 3, characterized in that, The lifting drive assembly (500) further includes a first gear (550) and a second gear (560). The rotary motor (520) is driven by the first gear (550), and the second gear (560) is coaxially connected to the screw (530). The first gear (550) and the second gear (560) mesh.

8. The lawnmower according to claim 7, characterized in that, The screw (530) is provided with a rotation operation interface (533), which is used to connect to a rotary wrench.

9. The lawnmower according to claim 1, characterized in that, The lawnmower also includes a second rotating component (600), which includes a fourth part (610) and a fifth part (620). The fourth part (610) is rotatably connected to the first bracket (200), and the fifth part (620) is rotatably connected to the second bracket (400). The fourth part (610) is located below the first part (310), and the fifth part (620) is located below the second part (320). The distance between the fourth part (610) and the first part (310) is equal to the distance between the fifth part (620) and the second part (320).

10. The lawnmower according to claim 9, characterized in that, The lawnmower also includes a tension spring (700), which has a third end (710) and a fourth end (720). The third end (710) is connected to the second bracket (400), and the fourth end (720) is connected to the second rotating member (600). The position of the third end (710) is higher than the position of the fourth end (720).

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