Grass trimmer

Abstract

The utility model discloses a grass trimmer which comprises a motor providing power, a battery pack, a handrail, a connecting rod and a cutter head assembly, the cutter head assembly comprises a cutter head (1), the cutter head (1) is provided with a first installation structure and a second installation structure, and the first installation structure is located on the top face of the cutter head (1) and used for installing blades (2); the blade (2) is of a whole structure and is coaxially installed with the cutter head (1), and the two ends of the blade (2) extend out of the side wall of the cutter head (1). The first mounting structure is provided with a positioning mechanism for positioning the blade (2); the second installation structure is located on the side wall of the cutter head (1) and used for installing a grass mowing rope (3), the second installation structure is provided with a fixing mechanism used for positioning the grass mowing rope (3), and one of the blades (2) and the grass mowing rope (3) is installed on the cutter head (1) in the working state. According to the grass trimmer, the integral blade can be used, the cutter head does not need to be disassembled and assembled when the blade and the grass trimming rope are replaced, and the applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a grass trimmer. Background Art

[0002] At present, a cutter disc mechanism for use with both a mowing rope and a blade has been disclosed, comprising a cutter disc body, a blade connecting shaft, a blade, a mowing rope, a mowing rope locking assembly, a cutter disc base plate and a mowing rotary power shaft, characterized in that a double-key connecting shaft sleeve is provided in the middle of the cutter disc body for receiving power provided by the mowing rotary power shaft, and a cutter disc inner cavity is formed by isolating the outer periphery of the double-key connecting shaft sleeve through a cutter disc inner cavity column for storing a mowing rope bundle formed by bundles of mowing ropes, and the mowing rope bundle is nested on the double-key connecting shaft sleeve, a cutter disc base plate is provided under the cutter disc body, and the cutter disc base plate is fixed on the cutter disc inner cavity column; the outer ends of the cutter disc body are respectively welded with mowing rope locking assemblies for locking the mowing rope, and the mowing rope locking assembly is provided with a locking block hole, and a mowing rope lead-out hole is provided on the cutter disc body at a position corresponding to the locking block hole; blade connecting shafts for installing the blades are symmetrically welded on the cutter disc body at both ends of the cutter disc base plate, and the blades can rotate around the blade connecting shaft. When the blade and the mowing rope are replaced separately in this structure, the two blades and the mowing rope need to be replaced separately without replacing the embedding of the cutter disc body, which makes it troublesome, time-consuming and labor-intensive for the operator to disassemble and install, and it is also impossible to use an integrated blade.

[0003] There is also a publicly available multi-blade lawn mower, comprising a turntable and a mowing element disposed on the turntable for mowing grass, the mowing element comprising a mowing blade and a mowing rope. The mower further comprises a first mounting structure for connecting the mowing blade to the turntable and a second mounting structure for connecting the mowing rope to the turntable, the mowing blade and the mowing rope being interchangeably mounted on the turntable; the second mounting structure comprising a first flange located at the bottom edge of the turntable and extending downward, the first flange having a transversely arranged second fixing hole, the mowing rope being connected to the second fixing hole via a fastener. The mowing blade has a mounting portion, the first mounting structure comprising first mounting holes arranged vertically on the mounting portion and first fixing holes arranged vertically on the turntable, and rivets passing through the first mounting hole and the first fixing hole connect the mowing blade to the turntable. The second mounting structure also includes a second flange located on the inner side of the bottom of the turntable and extending downward. The second flange is radially spaced from the first flange and has transversely arranged receiving holes. The fastener is a connecting sleeve circumferentially fixed to the outer wall of the cutting rope. The end of the cutting rope passes through the second fixing hole, the connecting sleeve, and the receiving hole in sequence. The outer end of the connecting sleeve connects to the inner side wall of the first flange, securing the cutting rope to the first flange. Although this structure does not require replacing the cutter disc when replacing the blade and cutting rope, the blade is also installed separately on the cutter disc, making it impossible to install a single, integrated blade, resulting in poor applicability. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a mower which can use an integral blade and does not need to disassemble the cutter disc when replacing the blade and the mowing rope, and has better applicability.

[0005] The technical solution of the present utility model is to provide a lawn mower with the following structure, including a motor for providing power, a battery pack, an armrest, a connecting rod and a cutter head assembly, the cutter head assembly including a cutter disc, the cutter disc being mounted at one end of the motor and rotating synchronously with the output shaft of the motor, and characterized in that: a first mounting structure and a second mounting structure are provided on the cutter disc, the first mounting structure being located on the top surface of the cutter disc and being used for mounting a blade; the blade is a whole structure and is mounted coaxially with the cutter disc, with both ends extending out of the side wall of the cutter disc; the first mounting structure is provided with a positioning mechanism for positioning the blade; the second mounting structure is located on the side wall of the cutter disc and is used for mounting a mowing rope, the second mounting structure is provided with a fixing mechanism for positioning the mowing rope, and in the working state, the cutter disc is mounted with one of the blade and the mowing rope.

[0006] The first mounting structure means that the center hole of the blade is sleeved on the motor output shaft extending out of the cutter disc and is locked with a locking nut.

[0007] The positioning mechanism is composed of at least one positioning post and at least one positioning block provided on the top surface of the cutter disc. The positioning post and the positioning block are eccentrically arranged with a distance between them. The blade body is provided with a first through hole, and the positioning post is embedded in the first through hole. The blade is long and its side wall is against the side wall of the positioning block.

[0008] There are two positioning blocks and they are symmetrically arranged. A circular ring is provided at the center of the blade, and two parallel edges are provided on the outside of the circular ring. After the blade is installed, the two parallel edges of the circular ring are embedded between the two positioning blocks.

[0009] The second mounting structure is provided with a fixing mechanism, which means that a groove is provided on the edge of the top surface of the cutter disc, and a second through hole and a third through hole are provided on the outer side surface of the groove. The mowing rope enters from one of the second through hole and the third through hole and exits from the other hole and is fixed after being tightened from the inside to the outside.

[0010] There are two groups of the second mounting structures, which are located at both ends of the diameter of the cutter disc.

[0011] A gasket is provided on the screw between the blade and the locking nut. After the gasket is added, the blade and the cutter disc are made parallel.

[0012] After adopting the above structure, the utility model has the following advantages: 1. There is no need to replace the cutter disc when disassembling the blade or the mowing rope, which has good applicability, saves time and effort during replacement, and brings convenience to the operator. 2. With an integral blade, it is only necessary to fix the center of the blade during installation, which further improves the convenience of replacement. 2. Since the cutter disc is provided with a first mounting structure and a second mounting structure, the first mounting structure is located on the top surface of the cutter disc and is used to install the blade; the blade is a whole structure and is installed coaxially with the cutter disc, with both ends extending out of the side wall of the cutter disc; the first mounting structure is provided with a positioning mechanism for positioning the blade; the second mounting structure is located on the side wall of the cutter disc and is used to install the mowing rope, that is, the blade mounting structure and the mowing rope mounting structure are separated so that the two do not affect each other's disassembly and assembly.

[0013] As an improvement, the first mounting structure means that the center hole of the blade is sleeved on the motor output shaft extending out of the cutter disc and is locked with a locking nut, which is convenient for disassembly and assembly and has sufficient locking force.

[0014] As an improvement, the first mounting structure is at least one positioning post and at least one positioning block provided on the top surface of the cutter disc, the positioning post and the positioning block are eccentrically arranged and a distance is provided between the two, the blade body is provided with a first through hole, the positioning post is embedded in the first through hole, the blade is long and the side wall is against the side wall of the positioning block, thereby increasing the positioning strength of the blade and providing side support and positioning effect.

[0015] As an improvement, the positioning blocks are two and symmetrically arranged. A circular ring is provided in the center of the blade, and two parallel edges are provided on the outside of the circular ring. After the blade is installed, the two parallel edges of the circular ring are embedded between the two positioning blocks, further increasing the side support force and positioning effect.

[0016] As an improvement, the second mounting structure is provided with a fixing mechanism, which means that a groove is provided on the edge of the top surface of the cutter disc, and a second through hole and a third through hole are provided on the outer side surface of the groove. The mowing rope enters from one of the second through hole and the third through hole and exits from the other hole and is fixed after being tightened from the inside to the outside. The rigidity of the mowing rope itself is utilized to tighten it between the two holes, and the centripetal force is utilized during operation to ensure that the mowing rope has sufficient locking force.

[0017] As an improvement, the second mounting structure has two groups, and is located at both end portions on the diameter of the cutter disc, where one group of mowing ropes or two groups can be placed.

[0018] As an improvement, a gasket is provided on the screw between the blade and the locking nut. After adding the gasket, the blade is parallel to the cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of installing a mowing rope on a mower according to the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the split body.

[0021] Figure 3 This is a schematic diagram of installing a blade on a grass trimmer of the present invention.

[0022] Figure 4 for Figure 3 Schematic diagram of the split body.

[0023] Figure 5 This is a schematic diagram of the connection between the blades and the mowing rope.

[0024] Figure 6 This is a three-dimensional schematic diagram of the connection between blades and mowing ropes.

[0025] Figure 7 This is a schematic diagram of the cross-section of the connection between the blades and the mowing rope.

[0026] As shown in the figure:

[0027] 1. Cutter disc, 2. Blade, 3. Mowing rope, 4. Motor output shaft, 5. Positioning column, 6. Positioning block, 7. First through hole, 8. Second through hole, 9. Third through hole, 10. Locking nut, 11. Groove, 12. Gasket. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1-7 As shown, a lawn mower according to the present invention includes a motor providing power, a battery pack, an armrest, a connecting rod, and a cutter head assembly. The cutter head assembly includes a cutter disc 1, which is mounted on one end of the motor and rotates synchronously with the motor output shaft 4. The cutter disc 1 of the present lawn mower can be equipped with either a blade 2 or a trimming rope 3, provided that the cutter disc does not need to be replaced. In the operating state, the cutter disc 1 is equipped with either the blade 2 or the trimming rope 3.

[0030] like Figure 1-2 As shown, a grass trimmer of the present invention is provided with a blade 2, and a first mounting structure and a second mounting structure are provided on the cutter disc 1. The first mounting structure is located on the top surface of the cutter disc 1 and is used to mount the blade 2; the blade 2 is a whole structure and is mounted coaxially with the cutter disc 1, with both ends extending out of the side wall of the cutter disc 1.

[0031] The first mounting structure is provided with a positioning mechanism for positioning the blade 2. The first mounting structure means that the center hole of the blade 2 is sleeved on the motor output shaft 4 extending out of the cutter disc 1 and is locked with a locking nut 10; the positioning mechanism is at least one positioning post 5 and at least one positioning block 6 provided on the top surface of the cutter disc 1. The positioning post 5 and the positioning block 6 are eccentrically arranged with a spacing therebetween. The blade 2 body is provided with a first through hole 7, and the positioning post 5 is embedded in the first through hole 7. The blade 2 is in the shape of an elongated strip and its side walls are against the side walls of the positioning block 6. The positioning blocks 6 are two and symmetrically arranged. A circular ring is provided in the center of the blade 2, and two parallel edges are provided on the outer side of the circular ring. After the blade 2 is installed, the two parallel edges of the circular ring are embedded between the two positioning blocks 6. A gasket 12 is provided on the screw between the blade 2 and the locking nut 10. After adding the gasket 12, the blade 2 is parallel to the cutter disc 1.

[0032] like Figure 3-4 As shown, a grass trimmer of the present invention is installed with a grass trimming rope 3, and the second mounting structure is located on the side wall of the cutter disc 1 for installing the grass trimming rope 3. The second mounting structure is provided with a fixing mechanism for positioning the grass trimming rope 3. The second mounting structure is provided with a fixing mechanism, which means that the top edge of the cutter disc 1 is provided with a groove 11, and the outer side surface of the groove 11 is provided with a second through hole 8 and a third through hole 9. The grass trimming rope 3 enters from one of the second through hole 8 and the third through hole 9 and exits from the other hole and is fixed after being tightened from the inside to the outside. The steel wire rope is a plastic rope with a certain rigidity. After being tightened and combined with the centrifugal force during use, it can ensure sufficient installation strength. There are two groups of the second mounting structures, which are located at both end portions on the diameter of the cutter disc 1.

Claims

1. A lawn mower comprising a motor for providing power, a battery pack, an armrest, a connecting rod and a cutter head assembly, wherein the cutter head assembly comprises a cutter disc (1), the cutter disc (1) being mounted at one end of the motor and rotating synchronously with the motor output shaft (4), and characterized in that: The cutter disc (1) is provided with a first mounting structure and a second mounting structure, wherein the first mounting structure is located on the top surface of the cutter disc (1) and is used for mounting a blade (2); the blade (2) is a whole structure and is mounted coaxially with the cutter disc (1), with both ends extending out of the side wall of the cutter disc (1); the first mounting structure is provided with a positioning mechanism for positioning the blade (2); the second mounting structure is located on the side wall of the cutter disc (1) and is used for mounting a mowing rope (3); the second mounting structure is provided with a fixing mechanism for positioning the mowing rope (3); in the working state, the cutter disc (1) is installed with one of the blade (2) and the mowing rope (3).

2. A grass trimmer according to claim 1, characterized in that: The first mounting structure means that the center hole of the blade (2) is sleeved on the motor output shaft (4) extending out of the cutter disc (1) and is locked with a locking nut (10).

3. The grass trimmer according to claim 1, characterized in that: The positioning mechanism comprises at least one positioning column (5) and at least one positioning block (6) provided on the top surface of the cutter disc (1); the positioning column (5) and the positioning block (6) are eccentrically arranged with a spacing therebetween; the blade (2) body is provided with a first through hole (7); the positioning column (5) is embedded in the first through hole (7); the blade (2) is in an elongated strip shape and its side wall abuts against the side wall of the positioning block (6).

4. A grass trimmer according to claim 3, characterized in that: The positioning blocks (6) are two and symmetrically arranged. A circular ring is provided at the center of the blade (2), and two parallel edges are provided on the outer side of the circular ring. After the blade (2) is installed, the two parallel edges of the circular ring are embedded between the two positioning blocks (6).

5. The grass trimmer according to claim 3, characterized in that: The second mounting structure is provided with a fixing mechanism, which means that a groove (11) is provided on the edge of the top surface of the cutter disc (1), and a second through hole (8) and a third through hole (9) are provided on the outer side surface of the groove (11); the mowing rope (3) enters from one of the second through hole (8) and the third through hole (9) and exits from the other hole and is fixed after being tightened from the inside to the outside.

6. The grass trimmer according to claim 1, characterized in that: There are two groups of the second mounting structures, which are located at both ends of the diameter of the cutter disc (1).

7. The grass trimmer according to claim 1, characterized in that: A gasket (12) is provided on the screw between the blade (2) and the locking nut (10), and after the gasket (12) is added, the blade (2) and the cutter disc (1) are parallel.

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