Grass trimming head of mower

Abstract

The utility model belongs to the technical field of mowing machines, and particularly relates to a mowing head of a mowing machine, a machine head main body is composed of a shell, a cutting area and a protective chassis, a cutting device is arranged in the cutting area, and the cutting area is located between the shell and the protective chassis. According to the mowing head of the mowing machine, under the action of centrifugal force generated by rotation of the cutting disc, the pay-off wheel is driven to rotate in the rotary bearing, so that the mowing rope is thrown out of the interior of the pay-off wheel under the cooperation of the balance weight ball, the length of the mowing rope does not need to be manually adjusted, the mowing head is more convenient to use, the mowing rope is thrown out of the interior of the through hole, and when cutting is stopped, the mowing head is convenient to use. The torsion spring pulls the pay-off wheel to rotate and reset under the action of the torsion of the torsion spring, so that the grass trimming rope is recycled, and the counterweight ball is larger than the inner diameter of the through hole, so that the through hole is blocked by the counterweight ball, the grass trimming rope is prevented from being completely recycled, and mosquitoes and the like can be prevented from entering the pay-off bin through the through hole.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a lawn mower head. Background Art

[0002] The lawn mower is a portable garden machine, and the mowing head is particularly important as the cutting device of the lawn mower. Its structure directly affects the labor intensity and work quality of the operator, as well as the consumption of the nylon rope and the service life of the mowing mechanism itself. The storage mowing rope type uses a high-speed rotating turntable to drive the nylon rope wound on the turntable to rotate, and the grass is cut by the inertia of the nylon rope. The extended length of the mowing rope of the existing lawn mower cannot be adjusted, and cannot meet different mowing needs.

[0003] For example, Chinese patent publication number CN217241454U discloses a mowing head structure for a lawn mower. When the length of a single mowing rope needs to be adjusted, the winding shaft only needs to be pressed along the axis direction by a wrench, the rotating gear disengages from the locking tooth, and then the winding shaft is rotated to adjust the length of the mowing rope. After the adjustment is completed, the winding shaft is loosened to make the rotating gear mesh with the locking tooth. When the length of all mowing ropes needs to be adjusted together, the locking wheel is pressed by a tool to disengage the locking wheel from the transmission wheel. At this time, the winding shaft only needs to be rotated by a wrench to drive all the winding shafts to rotate through the transmission gear to adjust the length of all the mowing ropes. After the adjustment is completed, the locking wheel is loosened to make the locking wheel mesh with the transmission gear. When the starting length of all the mowing ropes is the same and the target length is also the same, this function can greatly improve the adjustment efficiency and accuracy.

[0004] However, the mowing head structure for the lawn mower in the above application needs to be adjusted by a wrench when adjusting the cutting length of the mowing rope, which is cumbersome to operate and therefore has certain limitations.

[0005] For this reason, we urgently need to provide a lawn mower grass trimming head. Utility Model Content

[0006] The utility model aims to provide a mower head for a lawn mower, so as to solve the problem that the mower head structure for a lawn mower proposed in the above-mentioned background technology needs to be adjusted by a wrench when adjusting the cutting length of the mowing rope, which is relatively cumbersome to operate.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lawn mower trimmer head, including a head body, the head body is composed of a shell, a cutting area and a protective chassis, a cutting device is arranged inside the cutting area, and the cutting area is located between the shell and the protective chassis.

[0008] The cutting device comprises a rotating unit, a wire-releasing unit and a cleaning unit.

[0009] The rotating unit includes a cutting disc, a wire-paying bin, and a rotating shaft. The cutting disc is installed below the machine head body, the wire-paying bin is opened inside the cutting disc, and the bottom of the rotating shaft extends into the wire-paying bin and is connected to the cutting disc. The cutting disc is driven to rotate by the rotating shaft, thereby driving the grass rope inside the cutting disc to rotate, so as to mow and clean the lawn.

[0010] A further improvement is that the pay-off unit comprises a rotating bearing, a pay-off wheel, a torsion spring, a mowing rope, and a counterweight ball, the rotating bearing being installed on the left side inside the pay-off bin, the pay-off wheel being rotatably connected to the inside of the rotating bearing, the torsion spring being fixedly connected between the top of the pay-off wheel and the top wall of the pay-off bin, the mowing rope being wound around the pay-off wheel, and the counterweight ball being fixedly connected to the outer end of the mowing rope. Under the action of the centrifugal force generated by the rotation of the cutting disc, the pay-off wheel is driven to rotate inside the rotating bearing, so that with the cooperation of the counterweight ball, the mowing rope is thrown out from the inside of the pay-off wheel. There is no need to manually adjust the length of the mowing rope, and it is more convenient to use.

[0011] A further improvement is that through holes are respectively provided on the left and right outer surfaces of the cutting disk, and the through holes are communicated with the line-paying bin. The diameter of the counterweight ball is larger than the inner diameter of the through hole, and the mowing rope is thrown out from the inside of the through hole. When cutting stops, the torsion spring pulls the line-paying wheel to rotate and reset under the action of its own torque, thereby recovering the mowing rope. Because the counterweight ball is larger than the inner diameter of the through hole, the through hole is blocked by the counterweight ball to prevent the mowing rope from being completely recovered, and mosquitoes and the like can be prevented from entering the interior of the line-paying bin through the through hole.

[0012] A further improvement is that there are two groups of line-paying units, which are symmetrically installed on the left and right sides of the inside of the line-paying bin, and two grass-cutting ropes cooperate to better trim and cut the lawn.

[0013] A further improvement is that the cleaning unit includes a sliding chamber, an electromagnet, an elastic rope, a sliding rod, a curved plate, and a cleaning sponge, the sliding chamber is opened on one side of the through hole, the electromagnet is installed inside the sliding chamber, the elastic rope is fixedly connected to the outer end of the electromagnet, the sliding rod is fixedly connected to the outer end of the elastic rope and is slidably connected to the inner wall of the sliding chamber, the curved plate is fixedly connected to the outer end of the sliding rod, and the cleaning sponge is adhered to the outer surface of the curved plate.

[0014] A further improvement is that the sliding rod is made of magnetic material, and there are two groups of cleaning units. The two groups of cleaning units are symmetrically installed on the front and rear sides of the two through holes, two by two. When cutting is stopped and the mowing rope is recovered, the electromagnet is energized to repel the sliding rod, thereby pushing the sliding rod to slide out from the inside of the sliding cavity, so that the arc plate at its outer end contacts the surface of the mowing rope, and the cleaning sponge on the outer surface of the arc plate is used to wipe off the grass juice on the outer surface of the mowing rope during the retraction process, so as to prevent grass juice from dripping and contaminating the line-releasing bin.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The mowing head of the lawn mower drives the pay-off wheel to rotate inside the rotary bearing under the action of the centrifugal force generated by the rotation of the cutting disc, so that the mowing rope is thrown out from the inside of the pay-off wheel with the cooperation of the counterweight ball. There is no need to manually adjust the length of the mowing rope, which is more convenient to use.

[0017] 2. With the mowing head of the lawn mower, the mowing rope is thrown out from the inside of the through hole. When cutting stops, the torsion spring pulls the pay-off wheel to rotate and reset under the action of its own torque, thereby recovering the mowing rope. Because the counterweight ball is larger than the inner diameter of the through hole, the through hole is blocked by the counterweight ball to prevent the mowing rope from being completely recovered and to prevent mosquitoes and the like from entering the interior of the pay-off bin through the through hole.

[0018] 3. When the mower head stops cutting and retracts the mowing rope, the electromagnet is energized to repel the slide bar, thereby pushing the slide bar out of the sliding cavity, so that the arc plate at its outer end contacts the surface of the mowing rope, and the cleaning sponge on the outer surface of the arc plate is used to wipe off the grass juice on the outer surface of the mowing rope during the retraction process, so as to prevent grass juice from dripping and contaminating the line-releasing bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the split cross-sectional structure of the utility model;

[0021] Figure 3 For the utility model Figure 1 A schematic diagram of the enlarged structure of the cross-section at the center;

[0022] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged cross-section structure at point B in the middle.

[0023] In the figure: 1. Machine head body; 2. Shell; 3. Cutting area; 301. Cutting disc; 302. Pay-off bin; 303. Rotating shaft; 304. Rotating bearing; 305. Pay-off wheel; 306. Torsion spring; 307. Mowing rope; 308. Counterweight ball; 309. Sliding cavity; 310. Electromagnet; 311. Elastic rope; 312. Sliding rod; 313. Arc plate; 314. Cleaning sponge; 4. Protective chassis. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A lawn mower mower head comprises a head body 1, wherein the head body 1 is composed of a shell 2, a cutting area 3 and a protective chassis 4, a cutting device is arranged inside the cutting area 3, and the cutting area 3 is located between the shell 2 and the protective chassis 4.

[0028] The cutting device comprises a rotating unit and a wire-releasing unit.

[0029] The rotating unit includes a cutting disc 301, a wire-paying bin 302, and a rotating shaft 303. The cutting disc 301 is installed below the head body 1, the wire-paying bin 302 is opened inside the cutting disc 301, and the bottom of the rotating shaft 303 extends into the inside of the wire-paying bin 302 and is connected to the cutting disc 301. The cutting disc 301 is driven to rotate by the rotating shaft 303, thereby driving the grass rope 307 inside the cutting disc 301 to rotate, so as to mow and clean the lawn.

[0030] The pay-off unit includes a rotating bearing 304, a pay-off wheel 305, a torsion spring 306, a mowing rope 307, and a counterweight ball 308. The rotating bearing 304 is installed on the left side inside the pay-off bin 302, the pay-off wheel 305 is rotatably connected to the inside of the rotating bearing 304, the torsion spring 306 is fixedly connected between the top of the pay-off wheel 305 and the top wall of the pay-off bin 302, the mowing rope 307 is wound around the pay-off wheel 305, and the counterweight ball 308 is fixedly connected to the outer end of the mowing rope 307. Under the action of the centrifugal force generated by the rotation of the cutting disc 301, the pay-off wheel 305 is driven to rotate inside the rotating bearing 304, so that with the cooperation of the counterweight ball 308, the mowing rope 307 is thrown out from the inside of the pay-off wheel 305, and there is no need to manually adjust the length of the mowing rope 307, which is more convenient to use.

[0031] Through holes are respectively provided on the outer surfaces of the left and right sides of the cutting disk 301, and the through holes are communicated with the line-releasing bin 302. The diameter of the counterweight ball 308 is larger than the inner diameter of the through hole, and the grass-cutting rope 307 is thrown out from the inside of the through hole. When cutting stops, the torsion spring 306 pulls the line-releasing wheel 305 to rotate and reset under the action of its own torque, thereby recovering the grass-cutting rope 307. Because the counterweight ball 308 is larger than the inner diameter of the through hole, the through hole is blocked by the counterweight ball 308 to prevent the grass-cutting rope 307 from being completely recovered, and mosquitoes and the like can be prevented from entering the interior of the line-releasing bin 302 through the through hole.

[0032] There are two groups of line-releasing units, which are symmetrically installed on the left and right sides of the inside of the line-releasing bin 302, and the two grass-cutting ropes 307 cooperate to better trim and cut the lawn.

[0033] Embodiment 2:

[0034] On the basis of Example 1, the cutting device includes a cleaning unit, which includes a sliding chamber 309, an electromagnet 310, an elastic rope 311, a sliding rod 312, an arc plate 313, and a cleaning sponge 314. The sliding chamber 309 is opened on one side of the through hole, the electromagnet 310 is installed inside the sliding chamber 309, the elastic rope 311 is fixedly connected to the outer end of the electromagnet 310, the sliding rod 312 is fixedly connected to the outer end of the elastic rope 311, and is slidably connected to the inner wall of the sliding chamber 309, the arc plate 313 is fixedly connected to the outer end of the sliding rod 312, and the cleaning sponge 314 is adhered to the outer surface of the arc plate 313.

[0035] The slide bar 312 is made of magnetic material, and there are two groups of cleaning units. The two groups of cleaning units are symmetrically installed on the front and rear sides of the two through holes, two by two. When cutting is stopped and the grass rope 307 is recovered, the electromagnet 310 is energized, so that it repels the slide bar 312, thereby pushing the slide bar 312 to slide out from the inside of the sliding cavity 309, so that the arc plate 313 at its outer end contacts the surface of the grass rope 307, and the cleaning sponge 314 on the outer surface of the arc plate 313 is used to wipe off the grass juice on the outer surface of the grass rope 307 during the retraction process, so as to prevent the grass juice from dripping and contaminating the line-releasing bin 302.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A lawn mower mowing head, comprising a head body (1), characterized in that: The machine head body (1) is composed of a shell (2), a cutting area (3) and a protective chassis (4); a cutting device is arranged inside the cutting area (3); and the cutting area (3) is located between the shell (2) and the protective chassis (4); The cutting device comprises a rotating unit, a wire-releasing unit and a cleaning unit; The rotating unit comprises a cutting disc (301), a wire-paying bin (302), and a rotating shaft (303); the cutting disc (301) is installed below the machine head body (1); the wire-paying bin (302) is opened inside the cutting disc (301); the bottom of the rotating shaft (303) extends into the inside of the wire-paying bin (302) and is connected to the cutting disc (301).

2. A lawn mower trimmer head according to claim 1, characterized in that: The line-releasing unit comprises a rotary bearing (304), a line-releasing wheel (305), a torsion spring (306), a grass-cutting rope (307), and a weight ball (308); the rotary bearing (304) is installed on the left side of the inside of the line-releasing bin (302); the line-releasing wheel (305) is rotatably connected to the inside of the rotary bearing (304); the torsion spring (306) is fixedly connected between the top of the line-releasing wheel (305) and the top wall of the line-releasing bin (302); the grass-cutting rope (307) is wound on the line-releasing wheel (305); and the weight ball (308) is fixedly connected to the outer end of the grass-cutting rope (307).

3. The lawn mower head according to claim 2, characterized in that: The outer surfaces of the left and right sides of the cutting disc (301) are respectively provided with through holes, and the through holes are communicated with the line-releasing bin (302), and the diameter of the weighted ball (308) is larger than the inner diameter of the through holes.

4. The lawn mower head according to claim 3, characterized in that: There are two groups of wire-paying units, which are symmetrically installed on the left and right sides of the wire-paying bin (302).

5. The lawn mower trimmer head according to claim 2, characterized in that: The cleaning unit comprises a sliding chamber (309), an electromagnet (310), an elastic rope (311), a sliding rod (312), an arc-shaped plate (313), and a cleaning sponge (314); the sliding chamber (309) is opened on one side of the through hole; the electromagnet (310) is installed inside the sliding chamber (309); the elastic rope (311) is fixedly connected to the outer end of the electromagnet (310); the sliding rod (312) is fixedly connected to the outer end of the elastic rope (311) and is slidably connected to the inner wall of the sliding chamber (309); the arc-shaped plate (313) is fixedly connected to the outer end of the sliding rod (312); and the cleaning sponge (314) is adhered to the outer surface of the arc-shaped plate (313).

6. The lawn mower trimmer head according to claim 5, characterized in that: The sliding rod (312) is made of magnetic material. There are two groups of cleaning units in total. The two groups of cleaning units are symmetrically installed in pairs on the front and rear sides of the two through holes.

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