TWI722769B - Turntable device of lawn mower - Google Patents

Abstract

A turntable device of a lawn mower, comprising a cutter head, a plurality of limit components arranged on the cutter head spaced apart and arranged circularly, and a plurality of elastic weeding rods are respectively limited on the limit components, and And the plural respectively fix the limit components to the fixing parts on the cutter head. Each weeding rod can swing relative to the corresponding limit component with the axial direction of the cutter head as the rotation axis. The weeding rods can break the weed tissue surface, make the cut surface uneven and slow down the growth rate of weeds, and each weeding rod can rotate relative to the cutter head after being hit, so that the impact force can be relieved and avoided Hard-to-hard conditions, and the weeding rods are relatively hard but flexible rod-shaped bodies, which are wear-resistant and can increase their service life.

Description

Turntable device of lawn mower

The present invention relates to a cutting component, in particular to a turntable device of a lawn mower.

Generally, hand-held lawn mowers cut weeds by driving a turntable with blades to rotate to achieve the effect of weeding. However, the blades are too sharp and rigid. Although the former can reduce the vibration during weeding, it can also cause impurities. The cut surface on the grass is too flat and easy to regenerate quickly, and the latter is likely to cause serious damage to the blade itself when it hits a stone or other obstacles, which reduces the service life. In addition, the blade also has a safety problem that easily hurts people. In view of the above-mentioned shortcomings of blades or saw blades, nowadays, tendon ropes are often fixed on the turntable to replace traditional blades. Compared with the blade cutting weeds, the tendon ropes are used to weed the weeds by hitting. The cut surface is uneven to slow down the regeneration speed. On the other hand, when the beef tendon rope hits an obstacle, the rope structure can provide a buffer space to avoid damage caused by hard collisions. Compared with the blade, the beef tendon rope is also more effective. It's much safer to come.

However, tendon ropes are mostly fixed to the turntable by winding or clamping. On the other hand, the former is not easy to disassemble and assemble, while the latter has the problem of poor fixing ability. In addition, the strength of the tendon rope itself is poor, and the loss rate is faster, resulting in a short service life and the problem of frequent replacement.

Therefore, the object of the present invention is to provide a turntable device that is durable and can make the cut surface of weeds uneven.

Therefore, the turntable device of the lawn mower of the present invention includes a cutter head, a plurality of limit components arranged on the cutter head spaced apart from each other and arranged in a ring shape, and the plurality of limit components are respectively constrained on the limit components and are elastic The weeding rod and a plurality of fixing parts respectively fixing the limit components on the cutter head. Each of the limiting components includes two positioning pieces superimposed on each other along the axial direction of the cutter head, and the positioning pieces respectively define a plurality of openings. The weeding rods are respectively sleeved on the positioning pieces and can respectively pass through the openings, and can swing with the axial direction of the cutter disk as the rotation axis relative to the corresponding limit components. When the positioning pieces are superimposed, the openings of the positioning pieces face opposite directions, so that the opening of one positioning piece of the positioning pieces is blocked by the other positioning piece of the positioning pieces, so that the weeding rods are separately It is rotatably confined on the positioning pieces.

The effect of the present invention is that the weeding rods can break the tissue surface of weeds, make the cut surface uneven and slow down the growth speed of weeds, and each weeding rod can rotate relative to the cutter head after being hit. It can alleviate the impact force and avoid hard hits. In addition, the weeding rods are harder but elastic rod-shaped bodies, which are wear-resistant and can improve Service life.

1: Turntable device

11: cutter head

111: Hole

112: Around the wall

113: Connection part

114: Disc body

115: ring groove

116: Through hole

12: Limit components

121: positioning film

122: Ring Board

123: Hook

124: fixed hole

125: Extension slot

126: opening

13: Weeding rod

131: Ring

132: Rod Body

14: fixed parts

141: Bolt

142: Nut

2: Lawn mower

A: Axial direction

B: radial direction

C: circumferential direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a three-dimensional exploded view illustrating an embodiment of the turntable device of the lawn mower of the present invention, and only in FIG. 1 Shows one of the limiting components, one weeding rod, and one fixing member; Figure 2 is a side cross-sectional view, illustrating the side cross-sectional state of this embodiment; Figure 3 is a top view, illustrating the top state of this embodiment 4 is a three-dimensional exploded view, illustrating that this embodiment can be installed on a lawn mower.

Referring to Figures 1, 2, and 3, there is an embodiment of the turntable device 1 of the lawn mower of the present invention, which includes a cutter head 11, six equiangularly spaced and annularly arranged on the cutter head 11 Limiting components 12 (only one of them is shown in Figure 1), six weeding rods 13 (only one of which is shown in Figure 1) that are respectively limited to the limiting components 12, and six such weeding rods, respectively The limiting component 12 is fixed to the fixing member 14 on the cutter head 11 (only one of them is shown in FIG. 1). It should be noted that the axial direction A, the radial direction B, and the circumferential direction C mentioned in this embodiment are based on the cutter head 11. In addition, the limiting components 12 and the weeding rods 13 , And the number of the fixing parts 14 can also be other according to the demand, and the number is not limited to six.

The cutter head 11 includes a surrounding wall portion 112 surrounding an opening 111 extending in the axial direction A, a connecting portion 113 located in the opening 111 and connected to the surrounding wall portion 112 in the radial direction B, and Two disk parts 114 connected to the outer peripheral surface of the surrounding wall 112 and spaced apart from each other in the axial direction A. The disk body portions 114 cooperate with the surrounding wall portion 112 to define an annular groove 115 extending along the circumferential direction C. Each limiting component 12 includes two positioning pieces 121 superimposed on each other in the axial direction A but opposite to each other in the radial direction B. Each positioning piece 121 has a ring plate portion 122 placed in the ring groove 115 and a hooked portion 123 connected to the ring plate portion 122 and extending outside the ring groove 115 in the radial direction B. The ring plate 122 surrounds and defines a fixing hole 124 extending in the axial direction A. The hook portion 123 is bent to define an extension groove 125 extending in the radial direction B. The ring portion 122 and the hook portion 123 cooperate to define an opening 126 that communicates with the extension groove 125 and extends along the circumferential direction C. Each weeding rod 13 is an elastic steel bar, of course, it can also be an iron bar or other metal bar, and it is not limited to this. The weeding rod 13 includes a loop portion 131 that passes through the extension grooves 125 of the corresponding limit component 12 and is sleeved on the hook portions 123, and a loop portion 131 connected to the loop portion 131 and along the radial direction B The rod portion 132 that extends outward. Each fixing member 14 includes a bolt 141 penetrating the fixing holes 124 of the disc body portion 114 and the corresponding limit component 12 along the axial direction A, and a nut 142 locked at the end of the bolt 141 .

The following describes the method of installing each weeding rod 13 on the corresponding one of the limit components 12, firstly, the loop portion 131 of the weeding rod 13 is passed through one of the positioning pieces. The opening 126 of 121 enters the extension groove 125, and the loop portion 131 is sleeved on the hook portion 123, and then the above steps are repeated to fit the loop portion 131 on the hook curve of another positioning piece 121 On the part 123, the positioning pieces 121 are then superimposed, and the openings 126 of the positioning pieces 121 face the opposite direction as shown in FIG. 1, so that the opening 126 of each positioning piece 121 is blocked by another positioning piece 121, In turn, the weeding rod 13 is rotatably confined to the positioning pieces 121. As a result, the weeding rod 13 can swing and rotate relative to the positioning pieces 121 with the axial direction A as the axis of rotation. In addition, it can also have Degrees of freedom of rotation in other directions. When the weeding rod 13 needs to be removed, it is only necessary to loosen (but do not need to remove) the corresponding fixing member 14 to the extent that the positioning pieces 121 can be relatively rotated, and then the ring of the weeding rod 13 The portion 131 passes inwardly through the gap between the hooked and curved portions 123, so that the loop portion 131 is sleeved on only one of the positioning pieces 121, and then the positioning pieces 121 are rotated around the axis of the fixing hole 124 The relative rotation of the ground to make the positioning pieces 121 unfold. At this time, the ring portion 131 is also only sleeved on one of the positioning pieces 121 and the opening 126 is no longer restricted. Therefore, the weeding rod 13 can be removed from the opening. 126 moved out. Through the foregoing method, the weeding rod 13 can be removed without removing the fixing member 14, which is easy to operate and does not scatter parts everywhere. Of course, the fixing member 14 can also be removed to remove the limiting assembly 12 and the weeding rod 13 together.

1, 2, and 4, the connecting portion 113 of the cutter head 11 can be opened with a through hole 116, through the through hole 116, the cutter head 11 can be installed in a lawn mower as shown in Figure 4 2, the lawn mower 2 can drive the cutter head 11 to rotate, and the centrifugal force will The weeding rods 13 are thrown out along the radial direction B. Each weeding rod 13 can break the weeds by hitting to make the weed tissue surface rough and uneven, which can slow down the regeneration speed of the weeds. Since the weeding rods 13 can rotate relative to the limiting components 12, when each weeding rod 13 hits an obstacle such as a stone, it can be rotated in the opposite direction to relieve the impact force, avoiding hard hits and reducing injuries. In addition, the weeding rods 13 are elastic, wear-resistant, and hard-to-break iron rods, which can effectively extend the service life. On the other hand, the positioning pieces 121 only need to be locked with a corresponding bolt 141 and overlapped in opposite directions to limit the corresponding weeding rod 13, so that the weeding rod 13 has a degree of freedom of rotation but not. Will detach, the structure is simple but ingenious, and the disassembly and assembly are quick and convenient.

In summary, the weeding rod 13 of the present invention is wear-resistant and not easy to break, and can delay the regeneration speed of weeds. It has the advantages of beef tendon rope and blades, but also overcomes the shortcomings of both. The positioning component 12 is reversely superimposed through the two positioning pieces 121 to limit the position corresponding to the weeding rod 13 and still have the freedom of rotation. The disassembly and assembly are simple and the manufacturing is easy, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

1: Turntable device

11: cutter head

111: Hole

112: Around the wall

113: Connection part

114: Disc body

115: ring groove

116: Through hole

12: Limit components

121: positioning film

122: Ring Board

123: Hook

124: fixed hole

125: Extension slot

126: opening

13: Weeding rod

131: Ring

132: Rod Body

14: fixed parts

141: Bolt

142: Nut

2: Lawn mower

A: Axial direction

B: radial direction

C: circumferential direction

Claims (6)

A rotary table device of a lawn mower, comprising: a cutter head; a plurality of limit components, which are arranged on the cutter head in a circular arrangement and spaced apart from each other; each of the limit components includes two positions along the axial direction of the cutter head. Overlapping positioning pieces, the positioning pieces respectively define several openings; a plurality of weeding rods are respectively arranged on the positioning pieces so that they can pass through the openings and are elastic, and the weeding rods can be relatively limited relative to each other. The positioning component swings with the axial direction of the cutter head as the axis of rotation. When the positioning pieces are superimposed, the openings of the positioning pieces face the opposite direction, so that the opening of one of the positioning pieces is covered by the positioning pieces. The other positioning piece is shielded so that the weeding rods are respectively rotatably limited on the positioning pieces; and a plurality of fixing parts respectively fix the limiting components on the cutter head. The turntable device of a lawn mower according to claim 1, wherein each of the positioning pieces has a ring plate portion surrounding and defining a fixing hole, and a hook connected to the ring plate portion and provided with corresponding weeding rods A curved part, the ring plate part cooperates with the hook and curved part to define the opening, and the fixing parts are respectively penetrated with the fixing holes of the corresponding limit components along the axial direction of the cutter head. For the turntable device of a lawn mower according to claim 2, wherein the hook portions of the positioning pieces define an extension slot communicating with the corresponding opening, and each of the weeding rods includes a corresponding limiting component passing through The extension grooves are sleeved on the loop parts on the hook and curved parts, and a rod body part connected with the loop parts and extending outward. The turntable device of a lawn mower according to claim 3, wherein the cutter head includes a surrounding wall portion surrounding an opening extending in the axial direction, and a surrounding wall portion located in the opening and connected to the surrounding wall in the radial direction. The connecting portion of the wall portion, and two disk body portions connected to the outer peripheral surface of the surrounding wall portion and spaced in the axial direction, the disk body portions cooperate with the surrounding wall portion to define a limiting component for One end of the ring groove is inserted. The turntable device of a lawn mower according to claim 4, wherein each of the fixing parts includes a bolt that penetrates the disc body portion of the cutter head and the fixing holes corresponding to the limit components, and a Lock the nut at the end of the bolt. The turntable device of the lawn mower according to claim 1, wherein the weeding rods are made of metal.

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