Automatic folding grass cutter

Abstract

The utility model discloses an automatic folding grass knife, which relates to the technical field of garden instruments and comprises a base rod and at least one folding blade component. The folding blade assembly comprises a cutting blade and a linkage rod; the cutting blade comprises a connecting part and a cutting part; one end of the connecting part is fixedly connected with one end of the cutting part; a first shaft rod is arranged at one end of the connecting part; a second shaft rod is arranged at one end of the linkage rod; a rotating part is arranged on the connecting part, and the end, away from the second shaft rod, of the linkage rod is rotationally connected with the rotating part around a first axis; the base body rod is provided with a sliding groove. The first shaft rod and the second shaft rod are arranged in the sliding groove in a sliding mode in the first direction, and the first direction is perpendicular to the first axis. The first shaft rod and the second shaft rod are fixedly connected with the corresponding ends of the base body rod through elastic pieces respectively. The end, away from the connecting part, of the cutting part extends in the direction away from the base rod, and a cutting blade is arranged on the side, in the rotating direction of the base rod, of the cutting part. The damage degree of the blade is reduced, and the blade is automatically folded and is convenient to store.

Description

Technical Field

[0001] This utility model relates to the field of garden machinery technology, and in particular to an automatic folding grass knife. Background Technology

[0002] A lawnmower is a mechanical tool used for trimming lawns, vegetation, etc. It consists of a frame, motor, turntable, blades, and handle. The motor is mounted in the frame, which has a handle. The turntable is mounted on the motor's output shaft, and blades are mounted on the edge of the turntable.

[0003] When a lawnmower is mowing, the blades are easily damaged when they hit rocks or hard objects, increasing maintenance costs. In addition, most existing lawnmower blades are fixed, taking up a lot of space and being inconvenient to store when not in use. Utility Model Content

[0004] The purpose of this invention is to provide an automatic folding grass knife to solve the problems existing in the prior art, reduce the degree of damage to the blade, realize the automatic folding of the blade, and facilitate storage.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides an automatic folding grass knife, including a base rod and at least one folding blade assembly; the base rod is fixedly connected to the output shaft of a motor; the folding blade assembly is located on one side of the base rod; the folding blade assembly includes a cutting blade and a connecting rod; the cutting blade includes a connecting part and a cutting part, one end of the connecting part is fixedly connected to one end of the cutting part; a first shaft is provided at the end of the connecting part away from the cutting part, and a second shaft is provided at one end of the connecting rod; a rotating part is provided on the connecting part, and the end of the connecting rod away from the second shaft is rotatably connected to the rotating part about a first axis, the first axis being parallel to the axes of both the first and second shafts; the base rod opens... A sliding groove is provided; both the first shaft and the second shaft are slidably disposed in the sliding groove along a first direction, which is perpendicular to the first axis; one end of each of the first shaft and the second shaft is fixedly connected to an elastic element, and the other end of each elastic element is fixedly connected to the base rod; the end of the cutting part away from the connecting part extends away from the base rod, and the cutting part has a cutting blade on one side along the rotation direction of the base rod; in its natural state, the elastic element on the first shaft can pull the first shaft to move away from the second shaft, and the elastic element on the second shaft can pull the second shaft to move away from the first shaft.

[0007] Preferably, a folding blade assembly is provided on each side of the base rod.

[0008] Preferably, the elastic element is a spring.

[0009] Preferably, the linkage includes a first connecting piece and a second connecting piece; a first through hole is provided at one end of both the first connecting piece and the second connecting piece, and a second through hole is provided at the other end of both the first connecting piece and the second connecting piece; a third through hole is provided on the connecting part, and the third through hole forms the rotating part; a second shaft located in the sliding groove passes through the first through hole of the first connecting piece and the first through hole of the second connecting piece; the first connecting piece and the second connecting piece are respectively located on the upper and lower sides of the connecting part, and a third shaft passes through the second through hole of the first connecting piece, the third through hole, and the second through hole of the second connecting piece in sequence.

[0010] Preferably, a connecting block is fixed at the center of the base rod. The connecting block has a shaft hole and a pin limiting hole communicating with the shaft hole. The shaft hole is used to pass through the motor output shaft, and the pin limiting hole is used to pass through a pin that limits the relative position between the connecting block and the motor output shaft.

[0011] Preferably, it further includes a protective cover, which covers the base rod, and each of the elastic elements and part of the connecting blocks are located inside the protective cover.

[0012] The present invention achieves the following technical advantages over the prior art:

[0013] The automatic folding grass knife provided by this utility model adopts a folding blade assembly consisting of a connecting rod and a cutting blade, which is set on the base rod. Under the pulling action of the elastic element, the cutting part of the cutting blade has an opening or closing action, thereby realizing the opening and closing of the cutting part. When the motor output shaft drives the base rod to rotate, as the speed increases, due to the centrifugal force, the first shaft and the second shaft move in opposite directions within the sliding groove, thereby realizing the opening action of the cutting part and cutting action under the cutting blade of the cutting part. When the cutting part encounters a stone or a relatively hard object, the speed of the cutting part drops sharply. At this time, the centrifugal force at the first shaft and the second shaft decreases, and under the action of the elastic element, the cutting part retracts, reducing the damage to the cutting blade of the cutting part. After the cutting is completed, the cutting part moves closer to the base rod under the movement of the connecting part and the connecting rod, that is, the retraction action is realized, realizing its automatic folding and retraction, reducing the space occupied, and facilitating storage.

[0014] Furthermore, a folding blade assembly is installed on each side of the base rod to achieve double-blade cutting, which can improve cutting efficiency and ensure stable operation of the device.

[0015] Furthermore, the elastic element is a spring, whose components are common and readily available, making installation simple, convenient, and easy to maintain.

[0016] Furthermore, the linkage consists of a first connecting piece and a second connecting piece located above and below the cutting blade, and their connection is firm and stable.

[0017] Furthermore, the connecting block enhances the connection strength between the block and the motor output shaft, and the shaft hole and shaft pin limiting hole on it facilitate a quick and secure connection with the motor output shaft.

[0018] Furthermore, the protective cover can protect the elastic component, prevent foreign objects from interfering with it, and ensure its normal operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the automatic folding grass knife provided by this utility model in its unfolded state;

[0021] Figure 2 A schematic diagram of the structure of the automatic folding grass knife provided by this utility model with the protective cover removed in the unfolded state;

[0022] Figure 3 for Figure 2 A schematic diagram of the bottom structure;

[0023] Figure 4 for Figure 2 Axonometric drawing;

[0024] Figure 5 A schematic diagram of the overall structure of the automatic folding grass knife provided by this utility model in its retracted state;

[0025] Figure 6 for Figure 5 Top view;

[0026] Figure 7 A schematic diagram of the overall structure of the automatic folding grass knife provided by this utility model when it is opened to a greater extent;

[0027] Figure 8 for Figure 7 Top view.

[0028] In the picture:

[0029] 100-Automatic Folding Grass Knife;

[0030] 1-Base rod; 11-Sliding groove;

[0031] 2-Cutting blade; 21-Connecting part; 22-Cutting part; 23-Rotating part; 24-Cutting edge;

[0032] 3-Connecting rod; 31-First connecting piece; 32-Second connecting piece;

[0033] 4-First shaft;

[0034] 5-Second shaft;

[0035] 6-Third shaft;

[0036] 7-Connecting block; 71-Shaft hole; 72-Shaft pin limiting hole;

[0037] 8-Protective cover;

[0038] 9-Elastic element. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] The purpose of this invention is to provide an automatic folding grass knife to solve the problems existing in the prior art, reduce the degree of damage to the blade, realize the automatic folding of the blade, and facilitate storage.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] This embodiment provides an automatic folding grass knife 100, such as Figures 1 to 8As shown, it includes a base rod 1 and at least one folding blade assembly; the base rod 1 is fixedly connected to the output shaft of a motor; the folding blade assembly is located on one side of the base rod 1; the folding blade assembly includes a cutting blade 2 and a connecting rod 3; the cutting blade 2 includes a connecting part 21 and a cutting part 22, one end of the connecting part 21 is fixedly connected to one end of the cutting part 22; a first shaft 4 is provided at the end of the connecting part 21 away from the cutting part 22, and a second shaft 5 is provided at one end of the connecting rod 3; a rotating part 23 is provided on the connecting part 21, and the end of the connecting rod 3 away from the second shaft 5 is rotatably connected to the rotating part 23 about a first axis, the first axis being parallel to the axes of the first shaft 4 and the second shaft 5; the base rod 1 has a sliding groove 11; the first Both shaft 4 and second shaft 5 are slidably disposed in sliding groove 11 along a first direction, which is perpendicular to the first axis. One end of each of the first shaft 4 and second shaft 5 is fixedly connected to an elastic element 9, and the other end of each elastic element 9 is fixedly connected to the base rod 1. The end of the cutting part 22 away from the connecting part 21 extends away from the base rod 1, and the cutting part 22 has a cutting blade 24 on one side along the rotation direction of the base rod 1. In its natural state, the elastic element 9 on the first shaft 4 can pull the first shaft 4 to move away from the second shaft 5, and the elastic element 9 on the second shaft 5 can pull the second shaft 5 to move away from the first shaft 4, that is, the elastic element 9 is in a contracted state when not subjected to external force.

[0044] A folding blade assembly consisting of a connecting rod 3 and a cutting blade 2 is mounted on the base rod 1. Under the pulling action of the elastic element 9, the cutting part 22 of the cutting blade 2 opens or retracts, thereby realizing the opening and retraction of the cutting part 22. When the motor output shaft drives the base rod 1 to rotate, as the speed increases, due to the centrifugal force, the first shaft 4 and the second shaft 5 move away from each other in the sliding groove 11, thereby realizing the opening action of the cutting part 22, and cutting is performed under the cutting edge 24 of the cutting part 22. Cutting action; when the cutting part 22 encounters a stone or a relatively hard object, the speed of the cutting part 22 drops rapidly. At this time, the centrifugal force at the first shaft 4 and the second shaft 5 is reduced, and under the action of the elastic element 9, the cutting part 22 retracts, reducing the damage to the cutting blade 24 on the cutting part 22. After the cutting is completed, the cutting part 22 will move closer to the base rod 1 under the movement of the connecting part 21 and the linkage rod 3, that is, the retraction action is realized, realizing its automatic folding and retraction, reducing the space occupied, and making it easy to store.

[0045] Specifically, during the unfolding process of the cutting blade 2, the angle between the extending direction of the cutting edge 24 on the cutting part 22 of the cutting blade 2 and the first direction can change from an acute angle to an obtuse angle; for example... Figure 5 and Figure 6 At this time, the motor is not started, and the angle between the extension direction of the cutting edge 24 of the cutting blade 2 and the first direction is an acute angle; such as Figures 1-4As shown, at this time, with the motor running, the motor output shaft drives the automatic folding grass knife 100 to rotate, and the extension direction of the cutting edge 24 of the cutting blade 2 forms a right angle with the first direction; as shown Figure 7 and Figure 8 As shown, at this time, the angle between the extension direction of the cutting edge 24 of the cutting blade 2 and the first direction is an obtuse angle.

[0046] Specifically, the first shaft 4 and the second shaft 5 can both realize the reciprocating movement of the corresponding ends of the connecting part 21 and the connecting rod 3 in the first direction, and also realize their rotation about a direction parallel to the first axis.

[0047] Specifically, the connecting part 21 and the cutting part 22 are integrally formed.

[0048] Specifically, a folding knife assembly is installed on each of the left and right sides of the base rod 1, as follows:

[0049] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1 to 8 As shown, a folding blade assembly is provided on each side of the base rod 1. By providing a folding blade assembly on each side of the base rod 1, dual-blade cutting is achieved, which can improve cutting efficiency and ensure stable operation of the device.

[0050] Specifically, when a folding blade assembly is provided on both sides of the base rod 1, the end of the connecting part 21 of the folding blade assembly on one side away from the cutting part 22 and the connecting rod 3 of the folding blade assembly on the other side share a shaft (such as the first shaft 4 at the end of the connecting part 21 or the second shaft 5 at the end of the connecting rod 3); similarly, one end of the connecting rod 3 of the folding blade assembly on that side and the end of the connecting part 21 of the folding blade assembly on the other side away from the cutting part 22 share a shaft (such as the second shaft 5 at the end of the connecting rod 3 or the first shaft 4 at the end of the connecting part 21).

[0051] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 2-4 As shown, the elastic element 9 is a spring. The elastic element 9 uses a spring, whose components are common and readily available, making installation simple, convenient, and easy to maintain.

[0052] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 2-4As shown, the linkage 3 includes a first connecting piece 31 and a second connecting piece 32; each of the first connecting pieces 31 and 32 has a first through hole at one end and a second through hole at the other end; a third through hole is formed on the connecting part 21, which forms a rotating part 23; a second shaft 5 located in the sliding groove 11 passes through the first through hole of the first connecting piece 31 and the first through hole of the second connecting piece 32; the first connecting piece 31 and the second connecting piece 32 are located on the upper and lower sides of the connecting part 21 respectively, and a third shaft 6 passes through the second through hole, the third through hole of the first connecting piece 31, and the second through hole of the second connecting piece 32 in sequence. The linkage 3 is composed of the first connecting piece 31 and the second connecting piece 32 located above and below the cutting blade 2, and its connection is firm and stable.

[0053] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1 to 8 As shown, a connecting block 7 is fixed at the center of the base rod 1. The connecting block 7 has a shaft hole 71 and a pin limiting hole 72 communicating with the shaft hole 71. The shaft hole 71 is used for the motor output shaft to pass through, and the pin limiting hole 72 is used for a pin to pass through to limit the relative position between the connecting block 7 and the motor output shaft. The connecting block 7 enhances its connection strength with the motor output shaft, and the shaft hole 71 and pin limiting hole 72 facilitate a quick and secure connection with the motor output shaft.

[0054] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figures 5-8 As shown, it also includes a protective cover 8, which covers the base rod 1, and each elastic element 9 and part of the connecting block 7 are located inside the protective cover 8. The protective cover 8 can protect the elastic elements 9, prevent foreign objects from interfering with the elastic elements 9, and ensure the normal operation of the elastic elements 9.

[0055] Specifically, such as Figures 2-4 The diagram shows the structure without the protective cover 8. The protective cover 8 protects the spring, which is normally retracted (i.e., when the motor is not running). The two cutting blades 2 are retracted, and the moment of inertia is small. When the motor starts, the speed gradually increases, and the cutting blades 2 gradually open. The opening angle is proportional to the speed. When the cutting blades 2 encounter a stone or a relatively hard object, the speed of the cutting blades 2 drops drastically. At this time, the cutting blades 2 retract to avoid further damage.

[0056] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An automatic folding grass cutter, characterized in that: including a base rod and at least one folding blade assembly; The base rod is used to be fixedly connected to the motor output shaft; the folding blade assembly is located on one side of the base rod; The folding blade assembly comprises a cutting blade and a linkage rod; the cutting blade comprises a connecting portion and a cutting portion, one end of the connecting portion is fixedly connected to one end of the cutting portion; a first shaft rod is provided at one end of the connecting portion away from the cutting portion, and a second shaft rod is provided at one end of the linkage rod; a rotating portion is provided on the connecting portion, and one end of the linkage rod away from the second shaft rod is rotatably connected to the rotating portion around a first axis, and the first axis is parallel to the axes of the first shaft rod and the second shaft rod; The base rod is provided with a sliding groove; the first shaft rod and the second shaft rod are both slidably arranged in the sliding groove along a first direction, and the first direction is perpendicular to the first axis; the first shaft rod and the second shaft rod are respectively connected to one end of an elastic member, and the other end of each elastic member is connected to the base rod; One end of the cutting portion away from the connecting portion extends in a direction away from the base rod, and the cutting portion has a cutting blade on one side along the rotation direction of the base rod; In a natural state, the elastic member on the first shaft can pull the first shaft to move in a direction away from the second shaft, and the elastic member on the second shaft can pull the second shaft to move in a direction away from the first shaft.

2. The automatic folding grass cutter according to claim 1, characterized in that: A folding blade assembly is respectively arranged on both sides of the base rod.

3. The automatic folding grass cutter according to claim 1, characterized in that: The elastic member is a spring.

4. The automatic folding grass cutter according to claim 1, characterized in that: The connecting rod includes a first connecting piece and a second connecting piece; A first through hole is formed at one end of the first connecting piece and the second connecting piece, and a second through hole is formed at the other end of the first connecting piece and the second connecting piece; a third through hole is formed on the connecting portion, and the third through hole forms the rotating portion; The second shaft rod located in the sliding groove is passed through the first through hole of the first connecting piece and the first through hole of the second connecting piece; the first connecting piece and the second connecting piece are respectively located on the upper and lower sides of the connecting part, and a third shaft rod is passed through the second through hole of the first connecting piece, the third through hole and the second through hole of the second connecting piece in sequence.

5. The automatic folding grass cutter according to claim 1, characterized in that: A connecting block is fixed at the center of the base rod, and an axial hole and an axial pin limiting hole connected to the axial hole are opened on the connecting block. The axial hole is used to pass the motor output shaft, and the axial pin limiting hole is used to pass the axial pin that limits the relative position between the connecting block and the motor output shaft.

6. The automatic folding grass cutter according to claim 5, characterized in that: It also includes a protective cover, which covers the base rod, and each of the elastic members and part of the connecting blocks are located inside the protective cover.

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