TWI566685B - Lawn mower - Google Patents

Description

Mower unloading device

The invention relates to a knife unloading technique for a lawn mower.

The lawn mower usually has a rotating mechanism and a blade. After the rotating mechanism is energized, the driving blade rotates in one direction, and the grass cutting operation is performed on the grass passing by the lawn mower.

Some hard objects are hidden in the grass, such as stones or discarded metal objects. These hard objects cause damage to the blade, and the lighter damages the sharpness of the blade, and the heavy one causes the blade to be twisted and deformed, and it is necessary to replace the old one to perform the mowing operation.

However, the blade adopts a single-chip design, and the rotation is not easy to stop. It is often necessary for a user to prevent the blade from rotating by hand to perform the disassembly or installation work. In particular, the blade cuts the skin and easily infects the wound.

Therefore, how to safely remove or assemble a blade in a lawn mower is an urgent problem to be solved by the present invention.

The main object of the present invention is to prevent the blade from being unidirectionally rotated by using a staggered configuration, whether it is to assemble the blade on the lawn mower or to remove the blade from the lawn mower, which is safer than the prior art.

As a result of the above object, the present invention provides a knife unloading device for a lawn mower, comprising: a support plate; two blocking units, the blocking units are fastened to the support plate at a certain distance from each other; and a exposed structure is disposed on the support plate and located between the two blocking units.

When the support plate is close to a lawn mower, the two barrier units contact different sides of a blade to prevent the blade from rotating in one direction, thereby avoiding an unintended danger. At the same time, the exposed structure faces the joint of the blade and the lawn mower, facilitating the unloading of the knife or the assembly work.

Hereinafter, the objects, structures, and features of the related embodiments will be described in detail based on the drawings, and it is believed that the techniques, means, and effects of the present invention can be obtained from an in-depth and specific understanding.

10‧‧‧Unloading device

12‧‧‧ grip

20‧‧‧ Connection structure

22‧‧‧First bend

24‧‧‧second bend

26‧‧‧Connecting section

30‧‧‧Support board

32‧‧‧Combination hole

34‧‧‧ arc segments

36‧‧‧Adjustment hole

38‧‧‧Long hole

40‧‧‧block unit

42‧‧‧ nuts

44‧‧‧ straight column

46‧‧‧External thread section

50‧‧‧ revealed structure

52‧‧‧ holes

54‧‧‧ concave surface

60‧‧‧Mower

62‧‧‧blade

64‧‧‧fasteners

66‧‧‧Wrench

68‧‧‧Sleeve

70‧‧‧ drive parts

72‧‧‧ accommodating slot

74‧‧‧ head

76‧‧‧ditch

78‧‧‧ buckle

Figure 1 is an exploded view of a first embodiment of the knife unloading device of the present invention.

Fig. 2 is a view showing the state of use of the unloading device.

Figure 3 is an exploded view of a second embodiment of the knife unloading device of the present invention.

Figure 4 is a combination view of a third embodiment of the knife unloading device of the present invention.

Fig. 5 is a combination view showing a fourth embodiment of the unloading device of the present invention.

Figures 6, 7 and 8 are exploded views of the fifth, sixth and seventh embodiments of the unloading device of the present invention, respectively.

Please refer to FIG. 1 to illustrate a first embodiment of the unloading device 10. The specific structure. The unloading device 10 has a support plate 30 on which two blocking units 40 and a revealing structure 50 are disposed. These blocking units 40 are positioned below the support plate 30 at a distance from one another. The exposed structure 50 is located between the two barrier units 40.

The support plate 30 is flat, and the middle portion thereof is wider than the two ends, and the support plate 30 is coupled to a grip portion 12 through a connecting structure 20.

The connecting structure 20 in the figure is composed of a first curved portion 22 and a second curved portion 24. The second curved portion 24 is formed at the tail of the support plate 30, and is also bent by a flat plate material, and is fastened to the round grip portion 12 by free end welding. The first curved portion 22 is substantially in the shape of a round bar, and one end thereof is connected to the grip portion 12, and the other end is fixed to the support plate 30 adjacent to the second curved portion 24, and the second curved portion 24 is enclosed to form a hollow structure. The grip portion 12 is integrated with the support plate 30.

In the present embodiment, each of the blocking units 40 includes a straight column 44 and a nut 42. An externally threaded section 46 is formed at the top end of the straight post 44, and the externally threaded section 46 passes through a coupling hole 32 formed in the support plate 30. The nut 42 is locked to the externally threaded section 46 to form a pressing action on the support plate 30, so that the straight post 44 is fixed under the support plate 30 but is not easily separated.

The exposed structure 50 in the figure refers to a hole 52 formed in a wider portion of the support plate 30. The aperture 52 is round and has a diameter greater than the width of any of the unloading tools (not shown).

The unloading tool referred to herein generally refers to a wrench, a screwdriver, a post, a sleeve or other tool for blade removal.

As shown in Fig. 2, the grip portion 12 is forced to be coupled with the support plate 30 until the support plate 30 approaches the lawn mower 60. Two blocking unit 40 The straight post 44 contacts the different sides of the blade 62, preventing the blade 62 from rotating in one direction. For the blade 62, the two straight posts 44 are staggered.

At this point, the aperture 52 of the support plate 30 faces the junction of the blade 62 and the lawn mower 60, revealing a fastener 64, such as a screw, that locks the blade 62. Each user can hold the wrench 66, and the end of the sleeve 68 is placed around the driving portion of the wrench 66, and the other end passes through the hole 52 and covers the non-circular portion of the fastener 64, so that the unloading or assembly work is facilitated. Worried that the blade 62 is rotating at will.

Briefly, the blade 62 is blocked from the two straight posts 44 and cannot be rotated counterclockwise along the drawing to remove the blade 62 from the mower 60 by the wrench 66.

Conversely, with the two straight posts 44 preventing the blade 62 from rotating in a clockwise direction, the blade 62 can be assembled to the lawn mower 60 with a wrench 66.

Fig. 3 is a second embodiment of the unloading device 10, the construction of which is substantially the same as that of the first embodiment, with the difference that an additional drive member 70 is provided.

The driving member 70 has a receiving groove 72 at the top end and a head 74 at the bottom end. The head 74 and the receiving groove 72 are both non-circular. In addition to the head 74, the other portion of the drive member 70 is a circumferential surface having a smaller diameter than the aperture 52 of the support plate 30. A dimple 76 is formed on the outer surface of the driving member 70.

When the driving member 70 passes through the hole 52 of the supporting plate 30, the driving member 70 can rotate and rotate inside the hole 52, and the two buckles 78 are embedded in the corresponding grooves 76 of the driving member 70, so that the head portion 74 exposes the supporting plate 30 and is interposed therebetween. Between the two straight columns 44. These buckles 78 are generally C-shaped, and the diameter of each of the buckles 78 is larger than the diameter of the holes 52, which naturally prevents the drive member 70 from leaving the hole 52 of the support plate 30 without affecting the rotation of the drive member 70 relative to the support plate 30.

Thus, the receiving groove 72 of the driving member 70 covers the above-mentioned wrench 66 The drive portion is coupled to the fastener of the mower through the sleeve, and the blade can be safely removed or assembled.

Fig. 4 is a third embodiment of the unloading device 10, the construction of which is substantially the same as that of the first embodiment, the difference being as follows: First, the support plate 30 has an arcuate section 34, and the arcuate section 34 is located on the support plate 30. Far from the location of the connection structure 20.

Next, the exposed structure 50 is a concave curved surface 54 in place of the aperture of the first embodiment. The concave curved surface 54 is formed at the edge of the curved section 34, and its two ends are connected to the same side of the support plate 30. The concave curved surface 54 is located between the two barrier units 40 to reveal the fasteners of the lawn mower combined with the blade without affecting the unloading or assembly work.

In the present embodiment, each of the blocking units 40 has only straight legs 44, but no threaded segments and nuts. The top end of the straight column 44 is fastened to the bottom surface of the support plate 30 through a welding device (not shown).

Fig. 5 is a fourth embodiment of the unloading device 10, the construction of which is substantially the same as that of the third embodiment, the difference being that:

First, the grip portion 12 and the support plate 30 are both flat sheets.

Secondly, the connecting structure 20 is an engaging portion 26, one end of which is connected to the grip portion 12, and the other end is connected to the supporting plate 30 instead of the original curved frame surrounding structure. The engaging portion 26 is flat and inclined, so that the height difference between the grip portion 12 and the support plate 30 is formed, which is convenient for the user to hold the unloading device 10 without affecting the unloading or assembly work.

Fig. 6 is a fifth embodiment of the unloading device 10, the construction of which is substantially the same as that of the first embodiment, except that two rows of coupling holes 32 are formed on both sides of the hole 52 of the support plate 30.

There are three coupling holes 32 in each row, allowing the externally threaded section 46 to be locked by the nut 42 through the coupling hole 32, adjusting the distance of the straight column 44 to the exposed structure 50, and determining the distance between the two blocking units 40.

Fig. 7 is a sixth embodiment of the unloading device 10, the construction of which is substantially the same as that of the fifth embodiment, except that the two adjustment holes 36 are formed on both sides of the hole 52 of the support plate 30.

Each of the adjustment holes 36 corresponds to an integrated shape of the intersection of the three coupling holes, allowing the externally threaded section 46 to be locked by the nut 42 through the adjustment hole 36, and the distance between the straight column 44 and the exposed structure 50 can also be adjusted to determine the second blocking unit. 40 distances.

Fig. 8 is a seventh embodiment of the unloading device 10, the construction of which is substantially the same as that of the first embodiment, except that the two elongated holes 38 are located on both sides of the hole 52 of the support plate 30 instead of the original coupling hole.

The nut 42 is locked by the portion of the outer threaded portion 46 through the elongated hole 38, and the distance between the straight column 44 and the exposed structure 50 is adjusted to determine the distance between the two blocking units 40.

The above examples are merely illustrative of the invention and are not intended to limit the invention. Various changes, modifications, and applications derived from the above-described embodiments will be apparent to those skilled in the art.

10‧‧‧Unloading device

12‧‧‧ grip

20‧‧‧ Connection structure

22‧‧‧First bend

24‧‧‧second bend

30‧‧‧Support board

40‧‧‧block unit

42‧‧‧ nuts

44‧‧‧ straight column

50‧‧‧ revealed structure

52‧‧‧ holes

60‧‧‧Mower

62‧‧‧blade

64‧‧‧fasteners

66‧‧‧Wrench

68‧‧‧Sleeve

Claims (10)

A knife removing device (10) for a lawn mower, comprising: a supporting plate (30); two blocking units (40), the blocking units (40) are fastened to the supporting plate (30) at a certain distance from each other; The exposed structure (50) is disposed between the support plate (30) and between the two blocking units (40); when the support plate (30) is close to a lawn mower (60), the two blocking units (40) contact a blade (62) The different sides prevent the blade (62) from rotating in one direction to expose the structure (50) facing the joint of the blade (62) and the lawn mower (60), facilitating the unloading or assembly work. The unloading device of the lawn mower according to claim 1, wherein the exposed structure (50) is a hole (52) formed in an intermediate portion of the support plate (30). The unloading device of the lawn mower according to claim 2, further comprising a driving member (70) having a receiving groove (72) at the top end and a head (74) at the bottom end, the head (74) and The receiving groove (72) is non-circular, except for the head (74), the other part of the outer surface of the driving member (70) has a circumferential surface smaller than the hole (52) and two grooves (76) formed on the circumferential surface. When the driving member (70) passes through the hole (52) of the supporting plate (30), the two buckles (78) are respectively inserted into the corresponding grooves (76) of the driving member (70), and the diameters of the buckles (78) are larger than The diameter of the hole (52) prevents the driving member (70) from leaving the supporting plate (30) without affecting the rotation of the driving member (70) relative to the supporting plate (30), so that the head (74) Between two straight columns (44). The unloading device of the lawn mower according to the first aspect of the invention, wherein the exposed structure (50) is a concave curved surface (54), and the two ends of the concave curved surface (54) are connected to the same side of the supporting plate (30). It is in turn located between the two barrier units (40). The unloading device of the lawn mower according to claim 1, further comprising a grip portion (12) and a connecting structure (20), and the grip portion (12) and the support plate are transmitted through the connecting structure (20) (30) combined together. The unloading device of the lawn mower according to claim 5, wherein the connecting structure (20) comprises: a first bending portion (22), one end of which is connected to the grip portion (12), and the other end is firm. The support plate (30); a second curved portion (24), one end of which is connected to the support plate (30), and the other end is fixed to the grip portion (12). The unloading device of the lawn mower according to claim 5, wherein the connecting structure (20) is an engaging section (26), and one end of the engaging section (26) is connected to the grip portion (12), and the other end is connected. The support plate (30), the engaging section (26) is inclined, so that the grip portion (12) and the support plate (30) form a height difference with each other. The unloading device of the lawn mower according to claim 1, wherein each of the blocking units (40) comprises a straight column (44), and one end of the straight column (44) is fastened to the supporting plate (30). The unloading device of the lawn mower according to Item 8 of the patent application, wherein each of the blocking units (40) further has a nut (42), and the one is disposed on the straight column. The externally threaded section (46) of (44) is locked by a nut (42) through a coupling hole (32) formed in the support plate (30). The unloading device of the lawn mower according to claim 9, wherein the coupling hole is formed on the support plate (30) by an adjustment hole (36) or an elongated hole (38).