Lawn edger

Abstract

The utility model provides a kind of grass head and grass machine, it is related to garden tool technical field.The grass head is equipped with the joint of adaptation with connecting shaft, and the grass head is equipped with several threading passageways;On the projection plane perpendicular to connecting shaft, the axis of joint coincides with at least one threading passageway.The grass head not only facilitates the threading passageway of nylon thread, but also can avoid the threading passageway and nylon thread to cause the mass center of grass head to deviate from the axis of connecting shaft, improves the threading convenience and vibration performance of grass head.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, and in particular to a grass trimmer head and grass trimmer. Background Technology

[0002] The lawnmower uses a motor-driven trimmer head, which in turn drives a nylon cord to cut vegetation. In conventional operation, installing the nylon cord usually requires disassembling the trimmer head, which increases the difficulty of installation and affects ease of use. Furthermore, in traditional designs, the nylon cord must be threaded through the trimmer head, avoiding its geometric axis to prevent interference with the connecting shaft. However, this arrangement may cause the trimmer head's center of gravity to deviate from its rotation axis, adversely affecting its vibration characteristics during operation. Utility Model Content

[0003] The purpose of this utility model is to provide a grass trimmer head and a grass trimmer to alleviate the technical problems of inconvenient operation and poor vibration performance of the existing grass trimmer head with nylon thread.

[0004] Firstly, the grass trimmer provided by this utility model has a joint portion adapted to the connecting shaft, and the grass trimmer has several threading channels. On a projection plane perpendicular to the connecting axis, the axis of the joint coincides with at least one of the threading channels.

[0005] In conjunction with the first aspect, this utility model provides a first possible implementation of the first aspect, wherein the grass trimming head includes a single-channel pressure plate and a winding wheel, and the single-channel pressure plate is coaxially arranged and connected to the winding wheel; The plurality of said threading channels include a first channel located between the single-channel pressure plate and the winding wheel; The middle part of the first channel protrudes away from the joint.

[0006] In conjunction with the first possible implementation of the first aspect, this utility model provides a second possible implementation of the first aspect, wherein the winding wheel is connected to a double-channel pressure plate on the side away from the single-channel pressure plate, and the winding wheel and the double-channel pressure plate are coaxially arranged. The threading channels include a second channel and a third channel located between the winding wheel and the dual-channel pressure plate; Both the second channel and the third channel intersect the axis of the winding wheel.

[0007] In conjunction with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the second channel is perpendicular to the third channel on a projection plane perpendicular to the axis of the winding wheel.

[0008] In conjunction with the second possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the middle portion of the second channel and the middle portion of the third channel both protrude in a direction away from the joint portion.

[0009] In conjunction with the second possible implementation of the first aspect, this utility model provides a fifth possible implementation of the first aspect, wherein the grass trimmer head includes: a base, an elastic element, and a cover; The joint is disposed on the base, and the base is connected to the cover; The winding wheel is installed between the base and the cover; The elastic element abuts between the base and the single-channel pressure plate, or the elastic element abuts between the base and the winding wheel.

[0010] In conjunction with the fifth possible implementation of the first aspect, this utility model provides a sixth possible implementation of the first aspect, wherein the winding wheel is provided with a helical stop tooth, and the cover is provided with a one-way limiting tooth adapted to the helical stop tooth.

[0011] In conjunction with the fifth possible implementation of the first aspect, this utility model provides a seventh possible implementation of the first aspect, wherein the winding wheel passes through the cover and the winding wheel is connected to a striking head; The cover is located between the base and the striking head.

[0012] In conjunction with the fifth possible implementation of the first aspect, this utility model provides an eighth possible implementation of the first aspect, wherein two wire hole connectors are installed on the cover, and the two wire hole connectors are spaced apart along the cover; With one end of one of the wire passages aligned with one of the wire hole connectors, the other end of the wire passage is aligned with the other wire hole connector.

[0013] Secondly, the grass cutter provided by this utility model is equipped with the grass cutting head described in the first aspect.

[0014] The present invention provides the following beneficial effects: by using a grass trimmer head with several threading channels, the axis of the joint on the projection plane perpendicular to the connecting shaft coincides with at least one threading channel. This not only facilitates the threading of nylon thread through the threading channels, but also avoids the threading channels and nylon thread causing the grass trimmer head's center of gravity to deviate from the axis of the connecting shaft, thus improving the threading convenience and vibration performance of the grass trimmer head.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 An exploded view of the grass trimming head provided in an embodiment of this utility model; Figure 2 A partial cross-sectional view of the single-channel pressure plate and winding wheel of the grass trimming head provided in an embodiment of this utility model; Figure 3 An exploded view of the double-channel pressure plate and winding wheel of the grass trimmer provided in this embodiment of the utility model; Figure 4 A schematic diagram of the winding reel of the grass trimmer provided in an embodiment of this utility model; Figure 5 Cross-sectional view of the grass trimming head provided in the embodiment of this utility model Figure 1 ; Figure 6 Cross-sectional view of the grass trimming head provided in the embodiment of this utility model Figure 2 ; Figure 7 A schematic diagram of the cover for the grass trimming head provided in an embodiment of this utility model; Figure 8 A partial cross-sectional view of the lawn mower provided in an embodiment of this utility model.

[0018] Icons: 001-Single-channel pressure plate; 002-Winding wheel; 003-Double-channel pressure plate; 004-Base; 005-Elastic element; 006-Cover; 007-Striking head; 008-Wire hole connector; 009-Nylon wire; 010-Connecting shaft; 101-Joint; 102-First channel; 103-Second channel; 104-Third channel; 201-Helical stop tooth; 601-One-way limiting tooth. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are only used to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, the grass trimmer provided in this embodiment of the present invention has a joint portion 101 adapted to the connecting shaft 010, and the grass trimmer has a plurality of threading channels; on the projection plane perpendicular to the connecting shaft 010, the axis of the joint portion 101 coincides with at least one threading channel.

[0023] The joint 101 is connected to the connecting shaft 010 of the lawn mower by means of threaded engagement or snap-fit ​​engagement. At least one threading channel coincides with the axis of the joint 101 on the projection plane perpendicular to the connecting shaft 010, thereby ensuring that the nylon thread 009 passing through the threading channel coincides with the center of gravity of the lawn mower head on the projection plane.

[0024] In a preferred embodiment, multiple threading channels can be aligned with the axis of the joint 101 on a projection plane perpendicular to the connecting shaft 010. When the nylon thread 009 is threaded through any of these channels, it can coincide with the center of gravity of the trimmer head on the projection plane perpendicular to the connecting shaft 010. This avoids the nylon thread 009 being biased to the side of the connecting shaft 010, which would cause the nylon thread 009 and the trimmer head to form a center of gravity deviating from the axis of the connecting shaft 010, thus improving the overall vibration performance of the trimmer head.

[0025] like Figure 1 , Figure 2 and Figure 5 As shown in the embodiment of this utility model, the grass trimmer head includes a single-channel pressure plate 001 and a winding wheel 002. The single-channel pressure plate 001 and the winding wheel 002 are coaxially arranged and connected. A plurality of threading channels include a first channel 102 located between the single-channel pressure plate 001 and the winding wheel 002. The middle part of the first channel 102 protrudes in a direction away from the joint 101.

[0026] The winding wheel 002 is provided with a groove that is recessed in the direction away from the joint 101. A first wire groove is provided at the bottom of the groove. A single-channel pressure plate 001 covers the first wire groove so that a first channel 102 is formed between the single-channel pressure plate 001 and the winding wheel 002.

[0027] On the projection plane perpendicular to the axis of the joint 101, the first channel 102 extends along one of the diameter lines of the winding wheel 002. The middle part of the first channel 102 protrudes in the direction away from the joint 101 with an arc-shaped corner transition, so as to facilitate the insertion of the nylon thread from one end of the first channel 102 and its exit through the other end of the first channel 102.

[0028] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, a double-channel pressure plate 003 is connected to the side of the winding wheel 002 away from the single-channel pressure plate 001, and the winding wheel 002 and the double-channel pressure plate 003 are coaxially arranged; a plurality of threading channels include a second channel 103 and a third channel 104 located between the winding wheel 002 and the double-channel pressure plate 003; the second channel 103 and the third channel 104 both intersect the axis of the winding wheel 002.

[0029] The second channel 103 and the third channel 104 are located on the same layer and intersect each other. The first channel 102 is a single channel, while the second channel 103 and the third channel 104 are two intersecting channels. The nylon thread 009 can be selectively threaded through one of the first channel 102, the second channel 103, and the third channel 104.

[0030] Furthermore, on the projection plane perpendicular to the axis of the winding wheel 002, the second channel 103 is perpendicular to the third channel 104. Specifically, the angle between the intersection of the second channel 103 and the third channel 104 on the projection plane perpendicular to the axis of the winding wheel 002 is 90°. A nylon thread 009 inserted from one end of the second channel 103 will continue to extend along the second channel 103 at the intersection of the second channel 103 and the third channel 104, thus ensuring that the nylon thread 009 can exit through the other end of the second channel 103. Similarly, a nylon thread 009 inserted from one end of the third channel 104 will continue to extend along the third channel 104 at the intersection of the second channel 103 and the third channel 104, thus ensuring that the nylon thread 009 can exit through the other end of the third channel 104.

[0031] See Figure 4 The second channel 103 and the third channel 104 can be bent and extended on the projection plane perpendicular to the axis of the winding wheel 002, as long as the intersection of the second channel 103 and the third channel 104 forms a 90° angle. In an optional embodiment, the angle between one end of the second channel 103 and one end of the third channel 104 is 60°, and the angle between the other end of the second channel 103 and the other end of the third channel 104 is also 60°.

[0032] like Figure 1 , Figure 3 , Figure 6 and Figure 8 As shown, the middle part of the second channel 103 and the middle part of the third channel 104 both protrude in the direction away from the joint 101.

[0033] The winding wheel 002 has a convex surface that protrudes away from the joint 101. This convex surface has a second groove and a third groove along the preset tracks of the second channel 103 and the third channel 104. The dual-channel pressure plate 003 fits against this convex surface and covers the second groove and the third groove, thereby forming an intersecting second channel 103 and third channel 104 between the winding wheel 002 and the dual-channel pressure plate 003. When the nylon line is inserted into either the second channel 103 or the third channel 104, it will shift away from the joint 101 at the middle position of the channel. This ensures that the nylon line 009 still intersects with the axis of the center of gravity of the hay bale head, while avoiding interference between the nylon line 009 and the joint 101 and the connecting shaft 010.

[0034] See Figure 1 , Figure 5 , Figure 6 and Figure 8As shown, the grass trimmer head includes: a base 004, an elastic element 005, and a cover 006; a joint 101 is disposed on the base 004, and the base 004 is connected to the cover 006; a winding wheel 002 is installed between the base 004 and the cover 006; the elastic element 005 abuts against the base 004 and the single-channel pressure plate 001, or the elastic element 005 abuts against the base 004 and the winding wheel 002.

[0035] The winding wheel 002 is connected between the single-channel pressure plate 001 and the double-channel pressure plate 003 by screws or clips. The base 004 and the cover 006 are connected by clips or threads. The elastic element 005 is a compression spring or sheet device. By pressing the single-channel pressure plate 001 or the winding wheel 002, the winding wheel 002 tends to abut against the cover 006 axially.

[0036] like Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, the winding wheel 002 is provided with a spiral stop tooth 201, and the cover 006 is provided with a one-way limiting tooth 601 that is adapted to the spiral stop tooth 201.

[0037] Among them, the spiral stop tooth 201 and the one-way limiting tooth 601 can be configured as a ratchet mechanism that is compatible with each other. In other words, when the spiral stop tooth 201 and the one-way limiting tooth 601 are engaged, the compatible mating surfaces are biased towards the cover 006 along one of the rotation directions of the winding wheel 002.

[0038] Under the action of the elastic element 005, the spiral stop tooth 201 and the one-way limiting tooth 601 are engaged. The one-way limiting tooth 601 will restrict the winding wheel 002 from rotating in the opposite direction, so that the winding wheel 002 can only rotate in one direction. When the winding wheel 002 rotates, the nylon line 009 can be wound on the winding wheel 002.

[0039] Furthermore, the winding wheel 002 passes through the cover 006, and the winding wheel 002 is connected to the striking head 007; the cover 006 is located between the base 004 and the striking head 007.

[0040] During the wire release operation, the striking head 007 is used to strike the ground. The reaction force will squeeze the striking head 007, and the striking head 007 will push the winding wheel 002 to overcome the elastic force of the elastic element 005 and generate axial movement. The spiral stop tooth 201 disengages from the one-way limit tooth 601. Under the action of centrifugal force, the nylon line 009 can be released outward along the radial direction of the winding wheel 002 for a certain length.

[0041] See Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, two wire hole connectors 008 are installed on the cover 006, and the two wire hole connectors 008 are arranged at intervals along the cover 006; with one end of one wire channel aligned with one wire hole connector 008, the other end of the wire channel is aligned with the other wire hole connector 008.

[0042] Among them, the two openings of any one of the first channel 102, the second channel 103 and the third channel 104 are symmetrical about the center of the circumference of the winding wheel 002. When the two wire hole connectors 008 are one-to-one corresponding to the two ends of the first channel 102, the nylon wire 009 can pass into the first channel 102 through its first wire hole connector 008 and then pass out through the other wire hole connector 008; when the two wire hole connectors 008 are one-to-one corresponding to the two ends of the second channel 103, the nylon wire 009 can pass into the second channel 103 through its first wire hole connector 008 and then pass out through the other wire hole connector 008; when the two wire hole connectors 008 are one-to-one corresponding to the two ends of the third channel 104, the nylon wire 009 can pass into the third channel 104 through its first wire hole connector 008 and then pass out through the other wire hole connector 008.

[0043] like Figure 8 As shown, the grass cutter provided in this embodiment of the present invention is equipped with the grass cutting head described in the above embodiments. The grass cutter has the technical effects of the grass cutting head described above, which will not be repeated here.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A type of grass trimming head, characterized in that, The hay-trimming head is provided with a joint (101) adapted to the connecting shaft (010), and the hay-trimming head is provided with several wire-threading channels. On a projection plane perpendicular to the connecting shaft (010), the axis of the joint (101) coincides with at least one of the threading channels.

2. The hay trimmer according to claim 1, characterized in that, The grass trimming head includes a single-channel pressure plate (001) and a winding wheel (002), wherein the single-channel pressure plate (001) and the winding wheel (002) are coaxially arranged and connected. The plurality of said threading channels include a first channel (102) located between the single channel pressure plate (001) and the winding wheel (002). The middle part of the first channel (102) protrudes away from the joint (101).

3. The hay trimmer according to claim 2, characterized in that, The winding wheel (002) is connected to a double-channel pressure plate (003) on the side away from the single-channel pressure plate (001), and the winding wheel (002) and the double-channel pressure plate (003) are coaxially arranged. The threading channels include a second channel (103) and a third channel (104) located between the winding wheel (002) and the dual-channel pressure plate (003). The second channel (103) and the third channel (104) both intersect the axis of the winding wheel (002).

4. The hay trimmer according to claim 3, characterized in that, On the projection plane perpendicular to the axis of the winding wheel (002), the second channel (103) is perpendicular to the third channel (104).

5. The hay trimmer according to claim 3, characterized in that, The middle portion of the second channel (103) and the middle portion of the third channel (104) both protrude in a direction away from the joint (101).

6. The hay trimmer according to claim 3, characterized in that, The grass trimmer head includes: a base (004), an elastic element (005), and a cover (006); The joint (101) is disposed on the base (004), and the base (004) is connected to the cover (006); The winding wheel (002) is installed between the base (004) and the cover (006); The elastic element (005) abuts between the base (004) and the single-channel pressure plate (001), or the elastic element (005) abuts between the base (004) and the winding wheel (002).

7. The hay trimmer according to claim 6, characterized in that, The winding wheel (002) is provided with a spiral stop tooth (201), and the cover (006) is provided with a one-way limiting tooth (601) that is adapted to the spiral stop tooth (201).

8. The hay trimmer according to claim 6, characterized in that, The winding wheel (002) passes through the cover (006), and the winding wheel (002) is connected to a striking head (007). The cover (006) is located between the base (004) and the striking head (007).

9. The hay trimmer according to claim 6, characterized in that, Two wire hole connectors (008) are installed on the cover (006), and the two wire hole connectors (008) are spaced apart along the cover (006); With one end of one of the wire passages aligned with one of the wire hole connectors (008), the other end of the wire passage is aligned with another wire hole connector (008).

10. A lawn mower, characterized in that, The mower is equipped with a mower head as described in any one of claims 1 to 9.

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