Combined four-wheel grass trimmer

Abstract

The combined four-wheel grass trimmer comprises a handheld grass trimming main machine and an unpowered wheel type base, the unpowered wheel type base is provided with a base body and a limiting component, the limiting component comprises a release button, a limiting plate and a reset spring, the release button is movably connected with the limiting plate, one end of the release button is located outside the base body, and the other end of the release button is located outside the reset spring. The other end of the release button is located in the base body and movably connected with the base body, the limiting plate is provided with an inclined face, the inclined face intersects with the linear sliding direction of the limiting plate on the base body, and the pushing protrusion faces the inclined face and is movably connected with the inclined face. The combined type four-wheel grass trimmer is provided with a large-amplitude swing driving structure, a limiting plate can be driven to obtain a larger linear motion range, and the contact part between the handheld grass trimming main machine and the unpowered wheel type base is promoted to be effectively increased; the connection tightness between the handheld grass mowing main machine and the unpowered wheel type base, namely the stability of the combination state of the handheld grass mowing main machine and the unpowered wheel type base, is improved.

Description

Technical Field

[0001] The utility model relates to a combined four-wheel lawn mower. Background Art

[0002] As a gardening tool, the lawn mower is an essential tool for gardening work and has very strong professionalism for weed removal operations. Lawn mowers are usually divided into two types: wheeled lawn mowers and handheld lawn mowers. However, in order to provide both wheeled functions and a handheld operation mode, the prior art provides a combined four-wheel lawn mower. For example, a Chinese patent with the invention name of a combined lawn mower and the publication number of CN217657104U, which was published on October 28, 2022. In this patent document, it is recorded that a combined lawn mower is formed by combining a lawn mower main body with a sliding base and a roller assembly. This lawn mower can be used as a wheeled lawn mower in the combined state and can be used as a handheld lawn mower in the disassembled state. When the lawn mower main body is combined with the sliding base, it needs to be limited by a limiting component. The limiting component is provided with a driving member and a first limiting plate. Relying on the swinging motion of the driving member, the protrusion moves along an arc path, and after the protrusion moves, it drives the driving member to move. Since the radius of the swinging path of the protrusion is very small, the linear pushing range transferred to the driving member is extremely small, which also makes the movement range of the first limiting plate small. Then the size of the part on the first limiting plate that can block the lawn mower main body is small. Eventually, the combined state between the lawn mower main body and the sliding base is not stable enough and is easily disassembled by external forces.

[0003] Summary of the Invention

[0004] The technical problem to be solved by the utility model is how to improve the stability of the combined state, thereby obtaining a combined four-wheel lawn mower.

[0005] To solve the above technical problems, the present utility model adopts the following technical solutions: The combined four-wheel lawn mower includes a handheld lawn mowing main body and a non-powered wheeled base. A protective cover is provided on the handheld lawn mowing main body. The non-powered wheeled base is provided with a base body and a limiting member. The handheld lawn mowing main body is movably installed on the non-powered wheeled base through the limiting member. An installation groove for accommodating the protective cover is provided on the base body. The limiting member includes a release button, a limiting plate, and a return spring. The limiting plate is movably installed on the base body in a linear sliding manner. The return spring is located between the limiting plate and the base body. One end of the limiting plate extends into the installation groove under the push of the return spring. The release button is movably connected to the limiting plate. One end of the release button is located outside the base body, and the other end of the release button is located inside the base body and is movably connected to the base body. The release button is movably installed on the base body in a swinging manner. The release button includes a pressing part, a pushing protrusion, and an n-shaped swinging part. The swinging part is provided with two swing arms and a cross plate. The swing arms are respectively located at both ends of the cross plate. The pushing protrusion and the pressing part are both located in the middle of the cross plate. The extending directions of the swing arms and the pressing part are both perpendicular to the extending direction of the cross plate. The extending directions of the swing arms and the pressing part intersect. A rotating shaft is provided on the swing arm. The release button is embedded in the base body through the rotating shaft and is movably connected to the base body. The pressing part is located outside the base body, and the pushing protrusion faces the inside of the base body. The linear sliding range of the limiting plate on the base body is located between the two swing arms. An inclined surface is provided on the limiting plate. The inclined surface intersects with the linear sliding direction of the limiting plate on the base body. The pushing protrusion faces the inclined surface and is movably connected to the inclined surface.

[0006] The design concept of driving the limiting plate to move in the limiting member no longer relies on small swing movements, but large swing movements. This change in the design concept greatly increases the movement range of the limiting plate, effectively increasing the size of the part of the protective cover that the limiting plate can cover. As a result, the connection tightness between the handheld lawn mowing main body and the non-powered wheeled base is greatly increased, and it is not easy to be interfered by external forces and cause the handheld lawn mowing main body to abnormally disengage from the non-powered wheeled base.

[0007] To ensure the consistency of the contact process between the pushing protrusion and the inclined surface, the surface of the pushing protrusion is an arc surface, which can ensure that the direction of the force exerted by the pushing protrusion on the inclined surface remains consistent.

[0008] To facilitate the installation operation between the limiting bottom plate and the base body, the base body is provided with a chute Ⅰ, and the bottom of the limiting plate is provided with a sliding protrusion Ⅰ embedded in the chute Ⅰ. The return spring is located in the chute Ⅰ. At the same time, the sliding range of the limiting plate in the horizontal direction is restricted.

[0009] In order to be able to limit the movement range of the limit plate in the vertical direction, the base body is provided with a chute II, and sliding protrusions II that are embedded in the chute II are provided on both sides of the limit plate.

[0010] The present utility model adopts the above technical solution: The combined four-wheel lawn mower has a large swing drive structure, which can drive the limit plate to obtain a larger linear movement range, effectively increasing the contact part between the handheld lawn mowing main machine and the powerless wheeled base, and improving the connection tightness between the handheld lawn mowing main machine and the powerless wheeled base, that is, the stability of the combined state of the two. Description of the Drawings

[0011] The present invention will be further specifically described below in conjunction with the drawings and specific embodiments.

[0012] Figure 1 is a structural schematic diagram of a combined four-wheel lawn mower of the present utility model;

[0013] Figure 2 is a structural schematic diagram of the protective cover of a combined four-wheel lawn mower of the present utility model being embedded in the installation groove;

[0014] Figure 3 is Figure 1 a partial enlarged view of;

[0015] Figure 4 is a structural schematic diagram of a combined four-wheel lawn mower of the present utility model when entering the disassembly operation;

[0016] Figure 5 is a structural schematic diagram of the limit plate of a combined four-wheel lawn mower of the present utility model;

[0017] Figure 6 is a three-dimensional view of the release button of a combined four-wheel lawn mower of the present utility model;

[0018] Figure 7 is a structural schematic diagram of the release button of a combined four-wheel lawn mower of the present utility model; Specific Embodiments

[0019] As Figure 1 , 2 , 3, 4, 5, 6, 7 show, the combined four-wheel lawn mower includes two parts, namely a handheld lawn mowing main machine 1 and a powerless wheeled base.

[0020] The handheld grass trimmer main machine 1 is provided with a protective cover 2, and the grass cutting tool of the handheld grass trimmer main machine 1 is located in the protective cover 2. The non-powered wheeled base is provided with a base body 3 and a limiting component. Wheels are installed around the base body 3, and the base body 3 can be moved by pushing the base body 3 with external force; the base body 3 is provided with a mounting groove 4 for accommodating the protective cover 2, and the base body 3 is provided with a concave structure on one side of the mounting groove 4, which allows one side of the protective cover 2 to be embedded in the concave structure, and the limiting component is installed on the base body 3 and is located on the other side of the mounting groove 4. The function of the limiting component is to allow the protective cover 2 to enter the mounting groove 4 and limit the position of the protective cover 2 in the mounting groove 4, so as to achieve a combined state in which the base body 3 and the protective cover 2 are combined together; it also allows the protective cover 2 to be separated from the mounting groove 4, so as to achieve a state in which the base body 3 and the protective cover 2 are separated. Therefore, the handheld grass trimmer main machine 1 is movably installed on the non-powered wheeled base through the limiting component.

[0021] The limiting component includes a release button 5, a limiting plate 6, and a reset spring 7. The limiting plate 6 is movably mounted on the base body 3 in a linear sliding manner. A sliding protrusion Ⅰ13 is provided at the bottom of the limiting plate 6, the length of the sliding protrusion Ⅰ13 is less than the overall length of the limiting plate 6, and the sliding protrusion Ⅰ13 is located at the bottom of the middle position of the limiting plate 6. Symmetrically distributed sliding protrusions Ⅱ14 are provided on both sides of the limiting plate 6, and the two sliding protrusions Ⅱ14 extend in opposite directions in the horizontal direction. One end of the limiting plate 6 is used to extend into the mounting groove 4 to limit the protective cover 2, and the other end of the limiting plate 6 is provided with an inclined surface 15 for receiving external forces. The surface of the end of the limiting plate 6 extending into the mounting groove 4 is provided with an inclined guide surface.

[0022] A slide groove Ⅰ12 and two slide grooves Ⅱ are provided on the base body 3. The slide groove Ⅰ12 corresponds to the sliding protrusion Ⅰ13, and the slide groove Ⅱ corresponds to the sliding protrusion Ⅱ14. The two slide grooves Ⅱ are located on both sides of the slide groove Ⅰ12. When the limit plate 6 is installed on the base body 3, the sliding protrusion Ⅰ13 is embedded in the slide groove Ⅰ12, and the sliding protrusion Ⅱ14 is embedded in the slide groove Ⅱ. The slide groove Ⅰ12 limits the movement range of the sliding protrusion Ⅰ13 in the horizontal direction, and the two slide grooves Ⅱ limit the movement range of the sliding protrusion Ⅱ14 in the vertical direction. The reset spring 7 is located between the limit plate 6 and the base body 3. Specifically, the reset spring 7 is located inside the slide groove Ⅰ12, one end of the reset spring 7 is blocked by the sliding protrusion Ⅰ13, and the other end of the reset spring 7 is blocked by the base body 3. After installation, the reset spring 7 is in a compressed state, and the reset spring 7 always has a movement tendency to push the limit plate 6 toward the installation groove 4; in the initial state, the limit plate 6 extends into the installation groove 4.

[0023] The release button 5 is an integrated structure, which includes a pressing portion 8, a pushing protrusion 9, and an N-shaped swinging portion.

[0024] There are two swing arms 10 and a cross plate 11 at the swinging part. The swing arms 10 are respectively located at both ends of the cross plate 11. The pushing protrusion 9 and the pressing part 8 are both located at the middle position of the cross plate 11. The surface of the pushing protrusion 9 is an arc surface. The extending directions of the swing arms 10 and the pressing part 8 are both perpendicular to the extending direction of the cross plate 11, and the extending directions of the swing arms 10 and the pressing part 8 intersect. A rotating shaft is provided on the outer side of each swing arm 10, and the release button 5 is embedded on the base body 3 through the rotating shaft and is movably connected to the base body 3. After installation, the pressing part 8 is located outside the base body 3, that is, one end of the release button 5 is located outside the base body 3, and the part of the swing arm 10 where the rotating shaft is provided is located inside the base body 3, that is, the other end of the release button 5 is located inside the base body 3 and is movably connected to the base body 3. The release button 5 is movably installed on the base body 3 in a swinging manner; the pushing protrusion 9 faces the inside of the base body 3, and the inclined surface 15 intersects with the linear sliding direction of the limiting plate 6 on the base body 3. The pushing protrusion 9 faces the inclined surface 15 and the pushing protrusion 9 can be tightly pressed on the inclined surface 15 so that the pushing protrusion 9 is movably connected to the inclined surface 15. Therefore, the release button 5 is movably connected to the limiting plate 6. When the pushing protrusion 9 pushes the limiting plate 6, the limiting plate 6 can be driven to move. The linear sliding range of the limiting plate 6 on the base body 3 is located between the two swing arms 10.

[0025] During use, as long as the pressing part 8 of the release button 5 is pressed, the pushing protrusion 9 is urged to squeeze the inclined surface 15, and the limiting plate 6 starts to move along the direction away from the installation groove 4 under the action of an external force until one end of the limiting plate 6 no longer obstructs the protective cover 2 in the vertical direction. At this time, the handheld grass trimming main machine 1 can be removed from the powerless wheeled base. When assembling the handheld grass trimming main machine 1 to the powerless wheeled base, it is only necessary to ensure that one side of the protective cover 2 is embedded in the concave structure on one side of the base body 3 in the installation groove 4, and the other side of the protective cover 2 can smoothly enter the installation groove 4 without being obstructed by the end of the limiting plate 6 extending into the installation groove 4 in the initial state in the vertical direction. Then release the release button 5, let the limiting plate 6 extend into the installation groove 4 and cover the protective cover 2, and limit the position of the protective cover 2 in the vertical direction. In this way, the handheld grass trimming main machine 1 is assembled on the powerless wheeled base. It is also possible to apply pressure to the handheld grass trimming main machine 1 without pressing the release button 5, so that the edge of the protective cover 2 interacts with the guiding surface on the limiting plate 6, and then the protective cover 2 pushes away the limiting plate 6 to finally obtain the assembly effect.

Claims

1. A combined four-wheel lawn mower, the combined four-wheel lawn mower comprising a handheld lawn mowing main machine (1) and a powerless wheeled base. A protective cover (2) is provided on the handheld lawn mowing main machine (1). The powerless wheeled base is provided with a base body (3) and a limiting member. The handheld lawn mowing main machine (1) is movably installed on the powerless wheeled base through the limiting member. An installation groove (4) for accommodating the protective cover (2) is provided on the base body (3). The limiting member includes a release button (5), a limiting plate (6), and a return spring (7). The limiting plate (6) is movably installed on the base body (3) in a linear sliding manner. The return spring (7) is located between the limiting plate (6) and the base body (3). One end of the limiting plate (6) is pushed by the return spring (7) and extends into the installation groove (4). The release button (5) is movably connected to the limiting plate (6), and it is characterized in that: One end of the release button (5) is located outside the base body (3), and the other end of the release button (5) is located inside the base body (3) and is movably connected to the base body (3). The release button (5) is movably mounted on the base body (3) in a swinging manner. The release button (5) includes a pressing portion (8), a pushing protrusion (9), and a swinging portion in an "n" shape. The swinging portion is provided with two swing arms (10) and a cross plate (11). The swing arms (10) are respectively located at both ends of the cross plate (11). The pushing protrusion (9) and the pressing portion (8) are both located at the middle position of the cross plate (11). The extending direction of the swing arm (10) and the extending direction of the pressing portion (8) are both perpendicular to the extending direction of the cross plate (11). The extending direction of the swing arm (10) and the extending direction of the pressing portion (8) intersect. A rotating shaft is provided on the swing arm (10). The release button (5) is movably connected to the base body (3) by embedding the rotating shaft in the base body (3). The pressing portion (8) is located outside the base body (3), and the pushing protrusion (9) faces the inside of the base body (3). The linear sliding range of the limiting plate (6) on the base body (3) is located between the two swing arms (10). An inclined surface (15) is provided on the limiting plate (6). The inclined surface (15) intersects with the linear sliding direction of the limiting plate (6) on the base body (3). The pushing protrusion (9) faces the inclined surface (15) and the pushing protrusion (9) is movably connected to the inclined surface (15).

2. The combined four-wheel lawn mower according to claim 1, characterized in that: The surface of the pushing protrusion (9) is an arc surface.

3. The combined four-wheel lawn mower according to claim 1, wherein: The base body (3) is provided with a chute I (12). A sliding protrusion I (13) embedded in the chute I (12) is provided at the bottom of the limiting plate (6). The return spring (7) is located in the chute I (12).

4. The combined four-wheel lawn mower according to claim 1, characterized in that: The base body (3) is provided with a chute II. Sliding protrusions II (14) embedded in the chute II are provided on both sides of the limiting plate (6).

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