TW201622554A - Blade mechanism for mower - Google Patents

Abstract

A blade mechanism for a mower is disclosed, which comprises a knife holder, two position-limiting assemblies and two blades. The two detachable blades are respectively installed and fixed on the two rotational sections of the knife holder by the two position-limiting assemblies. With the assembled structural design of the knife holder, the two position-limiting assemblies and the two blades of the disclosed blade mechanism, the disassembly and replacement of the blade can be performed alone in the maintenance process of the blade mechanism without need to completely detach the mower. Accordingly, the disclosed blade mechanism is deemed as an innovative and practical design, capable of greatly reducing the maintenance cost and time cost of the mower.

Description

Blade mechanism of lawn mower

The present invention relates to a blade, and more particularly to a blade for a lawn mower.

As shown in FIG. 1 , the blade 100 currently used for the lawn mower is substantially a long piece extending from left to right, and a blade portion 101 is formed on one of the left and right halves thereof toward one side of the rotation direction thereof, so that the blade When 100 is driven by a lawn mower (not shown), the blades 101 can be used to cut plants for mowing.

However, after the blade 100 is used for a period of time, the blade portions 101 may be passivated and damaged due to long-term friction or collision with a hard object, so that the mowing effect is deteriorated, so the entire blade 100 has to be removed at intervals to grind. The blade portion 101 is not only inconvenient, but after the blade 100 is ground several times, the blade portion 101 is gradually retracted and deformed into an arc shape, as indicated by the imaginary line 200, so that the mowing effect is more The worse it is. If the entire blade 100 is replaced when the mowing effect starts to deteriorate, the maintenance cost is too high because the entire blade 100 is expensive. Of course, each time the grinding blade 101 must be removed, ground, assembled, etc., Time and cost must be increased, but if you continue to use it without replacing it, it will be because the mowing efficiency is worse. Spending more time on mowing operations increases the cost of time. Therefore, the blade 100 of the lawn mower currently has many disadvantages.

Accordingly, it is an object of the present invention to provide a blade mechanism for a lawn mower that is easy to disassemble and that also reduces maintenance costs.

Thus, the blade mechanism of the lawn mower of the present invention comprises a knife seat, two limit assemblies, and two blades. The holder has two rotating sections extending back and forth from one of its rotational axes, each of which has a side facing its direction of rotation. The limiting components are respectively fixed and fixed to the rotating sections, and each of the limiting components has a limiting plate spaced apart from the respective rotating sections, and a plurality of screwing holes are respectively threaded through the limiting position. a plate and the rotating section and can be screwed to urge the limiting plate against the locking member of the rotating section, and the limiting plate cooperates with the rotating section to define an in between Space for the knife. The blades are respectively inserted into the space of the equal-capacity knife by the locking members, and are respectively clamped up and down by the respective limiting plates and the respective rotating sections, and have at least one protrusion respectively. Extending the cutting side of the side of the respective rotating section.

The effect of the invention is that the assembly structure of the blade holder, the limiting component and the blades is such that the blade mechanism of the invention does not need to be completely detached from the lawn mower, and only needs to be separately replaced. The blade, which significantly reduces the maintenance cost of the mower, is an innovative and quite practical blade mechanism design.

3‧‧‧ knife holder

30‧‧‧Rotating axis

31‧‧‧Rotating section

310‧‧‧The knife gap

311‧‧‧ side

312‧‧‧Lock hole

4‧‧‧Limited components

41‧‧‧Limited board

410‧‧‧ 刀刀空间

42‧‧‧Locks

5‧‧‧blade

51‧‧‧Transcutting side

52‧‧‧Inlay side

53‧‧‧Positioning holes

530‧‧‧ embedded opening

54‧‧‧cross knife

55‧‧‧ Straight knife department

56‧‧‧blade

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a plan view of a conventional blade for a lawn mower; Figure 2 is a blade mechanism of the lawn mower of the present invention; A top view of a first embodiment of the first embodiment; Fig. 3 is an exploded perspective view of the left half of the first embodiment; Fig. 4 is a sectional view taken along line AA of Fig. 2; Fig. 5 is a view of a blade mechanism of the lawn mower of the present invention 2 is an exploded perspective view of the left half of the second embodiment; FIG. 6 is a side view of the second embodiment of the lawn mower of the present invention; and FIG. 8 is a plan view of a third embodiment of the blade mechanism of the lawn mower of the present invention; An exploded perspective view of the left half of the third embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

As shown in Figures 2, 3 and 4, the first embodiment of the blade mechanism of the lawn mower of the present invention is suitable for being mounted on a drive shaft of a lawn mower (not shown), which can be driven by the drive shaft. Used to cut grass. The blade mechanism comprises a knife seat 3, two limit assemblies 4 mounted to the tool holder 3, and two blades 5 respectively fixed to the holders 3 by the limit assemblies 4.

The blade holder 3 has two long-plate-shaped rotating sections 31 extending from the left and right of one of the rotating shaft centers 30, and the rotating sections 31 are respectively concavely disposed on one side of the rotating direction 31 and extend vertically. Nothing The ports 310 each have a side edge 311 defining a left and right extended edge of the respective pocket 316, and the rotating segments 31 are respectively provided with two left and right spaced locking holes 312.

Since the left and right halves of the rotating shaft 30 of the blade mechanism are symmetrical, the limiting components 4 and the blades 5 are respectively symmetrically mounted to the rotating sections 31 for convenience of explanation. Hereinafter, only the positional assembly 4 of the rotating section 31 attached to the left half of the seat 3 and the structural design and disassembly and use of the blade 5 will be described as an example.

The limiting component 4 includes a limiting plate 41 extending from the left and right and disposed above the rotating section 31, and two left and right spaced portions are disposed on the limiting plate 41 and screwed through the rotating plate The locking member 42 of the locking hole 312 of the segment 31, the limiting plate 41 is spaced apart from the rotating portion 31, and cooperates with the rotating portion 31 to define an in between, and A pocket space 410 in communication with the pocket nick 310. The lock members 42 are respectively bolts which can be respectively turned downward to press the limit plate 41 downward toward the rotating section 31.

The blade 5 is in the form of a sheet and is detachably inserted into the container space 410. The stacking limit is located between the top surface of the rotating section 31 and the bottom surface of the limiting plate 41, and partially protrudes outward. The side edge 311 is extended to be exposed in the pocket gap 310. The blade 5 has a cutting side 51 and a fitting side 52 extending left and right and opposite to each other. The cutting side 51 is oriented in the rotation direction of the rotating section 31 and is exposed to the pocket 30. The insert side 52 is in the direction of rotation facing away from the rotating section 31. The blade 5 also has two left and right intervals and runs up and down and extends to the fitting The positioning holes 53 of the side edges 52 each have an insertion opening 530 at the fitting side 52.

When the blade mechanism of the present invention is assembled, the locking members 42 can be turned up and down, and the limiting plate 41 is moved up relative to the rotating section 31, that is, the container space 410 is enlarged up and down, and then the blade is enlarged. The inserting side 52 of the inserting portion 52 is inserted into the shank space 410, so that the locking members 42 are respectively inserted into the positioning holes 53 from the insertion openings 530, so that the insert 5 can be inserted and positioned without being displaced left and right. Within the equal volume knife space 410. Then, the locking member 42 is screwed down, and the limiting plate 41 is pressed down against the rotating section 31, forcing the limiting plate 41 to clamp the blade 5 up and down with the rotating section 31. The assembly of the blade mechanism is completed at a time, and the blade 5 is positioned by the embedded positioning of the locking members 42 and the positioning plate 41 is clamped up and down with the rotating section 31.

When the blade mechanism is installed on the lawn mower for mowing, since the blades 5 are in the form of a sheet, the cutting side 51 of the blade 5 that is rapidly rotated after the blade mechanism is driven to rotate Will produce the effect of cutting plants. When the blades 5 are passivated or damaged, so that the mowing efficiency is deteriorated, and the blades 5 need to be replaced, the locking members 42 can be loosened to loosen the respective limiting plates 41. The blade 5 is replaced, and then the blade 5 can be pulled out of the container space 410, and then the new blade 5 can be reinserted according to the manner in which the blade 5 is mounted. This is convenient, and the entire blade is not required. Since the mechanism is replaced, the maintenance cost of the lawn mower can be greatly reduced. Therefore, when the mowing efficiency becomes low, the blade 5 can be replaced, thereby improving the mowing efficiency and reducing the time cost of the mowing operation.

In this embodiment, the limiting plates 41 and the blades 5 are mounted on the top side of the rotating sections 31, but in the implementation, the limiting plates 41 and the blades 5 can also be overlapped. Mounted on the bottom side of the rotating sections 31, the same can be used for mowing.

In the implementation, the rotating sections 31 are not necessary to provide the pockets 310. That is, the sides 311 are respectively the front sides of the rotating sections 31. The cutting side edges 51 of the blade 5 are each designed to project forwardly beyond the side edges 311 of the respective rotating sections 31. This blade mechanism can also be used for mowing.

As shown in Figures 5 and 6, the second embodiment of the blade mechanism of the present invention for a lawn mower differs from the first embodiment in the structural design of the blades 5. For convenience of explanation, only the differences between the present embodiment and the first embodiment will be described below.

In the present embodiment, each of the blades 5 has a horizontal knife portion 54 extending horizontally left and right, and a straight knife portion 55 extending upward from the end of the transverse knife portion 54 close to the rotation axis 30, and the horizontal portion The knife portion 54 cooperates with the straight knife portion 55 to define the turning side 51, and the transverse knife portion 54 is provided with the positioning holes 53 and defines the fitting side 52.

When the blade 5 is mounted, the straight blade portion 55 is inserted into the cavity area 410 of the horizontal blade portion 54 adjacent to the rotation axis 30, so that the locking members 42 respectively The insert is positioned in the positioning holes 53 , and the turning side 51 is exposed in the pocket gap 310 . Then, by inserting the locks 42 in a manner, the respective limit plates 41 are forced to clamp the cross-knife portion 54 up and down with the respective rotating segments 31 to complete the knife. The mounting of the sheet 5 is fixed.

When the blade mechanism is driven to rotate by the lawn mower, the blades 5 can be further rotated by the horizontal blade portion 54 to cut the weeds extending up and down, and further, the straight knife extending upward and rotating at a high speed can be further used. a portion 55, which cuts any vine extending laterally adjacent to the drive shaft, and can form a virtual annular retaining wall that protects the outer peripheral side of the drive shaft, thereby effectively preventing the cane of the vine from wrapping around the drive shaft. Causes the mower to malfunction and stop.

Moreover, when the mowing efficiency of the blade mechanism is caused by the passivation or damage of the blades 5, only the blades 5 need to be replaced, and the entire blade mechanism is not required to be replaced, which is convenient and reduces maintenance costs. When the mowing efficiency is low, the replacement of the blade 5 is performed, thereby improving the mowing efficiency and reducing the time cost of the mowing operation.

As shown in Figures 7 and 8, the third embodiment of the blade mechanism of the lawn mower of the present invention differs from the first embodiment in the structural design of the blades 5.

In this embodiment, each of the blades 5 has two cutting sides 51 extending left and right and facing back and forth, and having two blade portions 56 respectively located at the turning sides 51, and the positioning holes 53 The insertion opening 530 is not provided.

When the blade 5 is mounted on the blade holder 3, after the locking member 42 is screwed away from the blade holder 3, the blade 5 is stacked on the top surface of each of the rotating sections 31, and the limit is set. The plate 41 is folded down against the top surface of the blade 5, and then the locking members 42 are respectively passed down through the limiting plate 41 and passed through. The positioning holes 53 of the blade 5 are screwed to the rotating section 31, and the limiting plate 41 is forced to sandwich the blade 5 with the rotating section 31. That is, the installation of the blade 5 is completed. At this time, one of the blades 56 of the blade 5 is exposed outside the side 311 of the rotating section 31, and can be used to cut weeds.

When the blade portion 56 is passivated or damaged and is no longer suitable for mowing, the limiting assembly 4 can be detached from the rotating section 31, and the blade 5 can be flipped up and down by 180° to be replaced by another blade 5 The blade portion 56 is exposed outside the side edge 311, and the blade 5 is locked to the rotating section 31 by the limiting component 4, and the blade mechanism can be used for mowing again, without directly replacing the blade. 5, and when implemented, the blade 5 can also be separately removed for grinding, and can be used repeatedly. When the blade 5 is no longer suitable, the blade 5 can be directly replaced without replacing the entire blade mechanism, and the maintenance cost can be reduced.

In addition, it should be noted that the structure of the positioning holes 53 of the blade 5 of the embodiment and the structure of the blade portions 56 can also be transferred to the first embodiment and the second embodiment, and the first embodiment described above The structure of the positioning holes 53 can also be transferred to the present embodiment, and the object of the present invention can be achieved as well.

Furthermore, in the present embodiment, the seat 3 is only provided with two rotating sections 31, but in practice, the seat 3 can also be changed to have more rotating sections 31, for example three or four. One or more of the rotating sections 31 are respectively protruded outward from the rotating shaft center 30, and a blade 5 and a limiting component 4 are respectively disposed in the rotating sections 31, which are better. Mowing efficiency.

In summary, the assembly structure of the blade holder 3, the limiting components 4 and the blades 5 is such that the blade mechanism of the present invention does not need to be detached from the lawn mower when repairing the blade mechanism, only It is necessary to separately replace the blades 5 directly used for mowing, in addition to being quite convenient, since the price of the blades 5 is much lower than that of the entire blade mechanism, the maintenance cost of the mower can be greatly reduced, so the mowing efficiency can be changed. When the blade 5 is replaced, the blade 5 is replaced, thereby improving the mowing efficiency and reducing the time cost of the mowing operation. This is an innovative and quite practical blade mechanism design, and thus the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

3‧‧‧ knife holder

31‧‧‧Rotating section

310‧‧‧The knife gap

311‧‧‧ side

312‧‧‧Lock hole

4‧‧‧Limited components

41‧‧‧Limited board

42‧‧‧Locks

5‧‧‧blade

51‧‧‧Transcutting side

52‧‧‧Inlay side

53‧‧‧Positioning holes

530‧‧‧ embedded opening

Claims (8)

A blade mechanism of a lawn mower, comprising: a knife seat having two rotating sections extending from left to right of one of the rotating shaft centers, the rotating sections respectively having a side facing the direction of rotation thereof; The limiting components are respectively fixed and fixed to the rotating sections, and each of the limiting components has a limiting plate spaced apart from the respective rotating sections, and a plurality of screwing holes are respectively threaded on the limiting plate The rotating section can be screwed to urge the limiting plate against the locking member of the rotating section, and the limiting plate cooperates with the rotating section to define a tolerance between the two The space and the two blades are respectively inserted into the space of the equal-capacity knife by the locking members, and are respectively clamped up and down by the respective limit plates and the respective rotating sections, and respectively have At least one of the flanging sides projecting from the side of the respective rotating section. The blade mechanism of the lawn mower according to claim 1, wherein each of the blades has a plurality of positioning holes penetrating up and down and respectively for the locking members to pass through the set positions. The blade mechanism of the lawn mower according to claim 2, wherein each of the blades further has a fitting side opposite to the front and back sides of the cutting side, the positioning holes respectively having an extension exposed to the fitting The side edges are respectively detachably inserted into the positioned insertion openings. The blade mechanism of the lawn mower according to claim 1, wherein the rotating sections are respectively recessed to the left and right sides of one side of the rotating direction thereof and And extending through the upper and lower sides, respectively, and respectively forming the cutting edges of the cutting edges of the blades to the left and right extending edges of the equal-shaped cutter notches. A blade mechanism for a lawn mower according to claim 2, 3 or 4, wherein each of the blades has a blade portion formed on the side of the cutting and exposed outside the side. The blade mechanism of the lawnmower of claim 2, 3 or 4, wherein the blades are respectively clamped by the limiting plates against the top surface of the rotating sections, each blade having a left and right a transverse knife portion extending through the setting position and being clamped by the respective limiting plate and the respective rotating section, and a straight knife portion extending upward from the transverse knife portion, the straight knife portion The turning side is formed on the horizontal knife portion and the straight knife portion. The blade mechanism of the lawn mower according to claim 6, wherein the straight knife portion protrudes upward from an end of the transverse knife portion adjacent to the rotation axis of the holder. The blade mechanism of the lawn mower according to claim 2, wherein each of the blades has two front and back turned sides, and can be turned upside down to expose one of the cut sides to the side Outside the side, there are two blades respectively formed on the sides of the cutting sides.