CN110651594A

CN110651594A - Grass cutter

Info

Publication number: CN110651594A
Application number: CN201910577771.XA
Authority: CN
Inventors: 塔那皮帕尔特·阿卡拉威吉特沃恩
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2018-06-29
Filing date: 2019-06-28
Publication date: 2020-01-07
Anticipated expiration: 2039-06-28
Also published as: CN110651594B; JP7077160B2; JP2020000139A

Abstract

The invention provides a technology capable of easily removing grass in a grass collecting box. The lawn mower includes: a body having a wheel; a cutter provided to the main body for trimming grass growing on the ground; and a grass collection box detachably attached to the main body, the grass collection box collecting grass cut by the cutter. The grass collecting box has a discharge port for discharging the collected grass in a state where the grass collecting box is detached from the main body. The body has a movable cover that closes the discharge opening of the grass collecting box when the grass collecting box is attached to the body.

Description

Grass cutter

Technical Field

This description relates to a lawn mower.

Background

Patent document 1 discloses a lawn mower. This lawn mower includes: a body having a wheel; a cutter provided to the main body; and a grass collection box for collecting grass cut by the cutter. The grass collecting box can be assembled and disassembled relative to the main body, and a user can detach the grass collecting box from the main body and remove grass collected in the grass collecting box.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2009-118823

Disclosure of Invention

Problems to be solved by the invention

A cover or a door for discharging the collected grass can be provided at the grass collecting box. With this configuration, the user can quickly remove grass in the grass collecting box by opening the cover or the door. However, if the cover or the door is provided in the grass-collecting box, the cover or the door may become an obstacle when the user removes the grass from the grass-collecting box. The present specification provides a technique that can solve or reduce such problems and easily remove grass in a grass collecting box.

Means for solving the problems

The mowing disclosed in the present specification includes: a body having a wheel; a cutter provided to the main body for trimming grass growing on the ground; and a grass collection box detachably attached to the body, the grass collection box collecting grass cut by the cutter. The grass collecting box has a discharge port for discharging the collected grass in a state where the grass collecting box is detached from the main body. The body has a movable cover that closes the discharge opening of the grass collecting box in a state where the grass collecting box is attached to the body.

In the above configuration, the movable cover for closing the discharge port of the grass collecting box is provided not in the grass collecting box but in the main body. When the grass-collecting box is detached from the main body, the movable cover is left on the main body. Therefore, when the user removes the grass in the grass collecting box, the movable cover does not obstruct the grass. The user can easily remove grass in the grass-collecting box.

Drawings

Fig. 1 is a perspective view showing a lawnmower 10 according to an embodiment.

Fig. 2 is a sectional view showing the internal structure of the lawnmower 10.

Fig. 3 is a perspective view showing the rear part of the lawnmower 10, in which the grass-collecting box 18 is attached to the main body 14, and the movable cover 42 is disposed at the closing position.

Fig. 4 is a perspective view showing the rear part of the lawnmower 10, in which the grass-collecting box 18 is attached to the main body 14, and the movable cover 42 is disposed at the open position.

Fig. 5 is a perspective view showing the rear part of the lawnmower 10, where the grass-collecting box 18 is detached from the main body 14 and the movable cover 42 is disposed at the open position.

Fig. 6 is a sectional view showing the movable cover 52 for closing the cleaning opening 50.

Fig. 7 is a sectional view showing movable cover 52 for opening cleaning opening 50.

Description of the reference numerals

12. A wheel; 14. a main body; 16. a cutter; 18. a grass collecting box; 20. a cutter unit; 22. a handle unit; 24. a grass collecting pipeline; 26. a motor; 30. a handle; 40. a discharge port of the grass collecting pipeline; 42. a movable cover; 44. a torsion coil spring; 46. a locking mechanism; 50. a cleaning port; 52. a movable cover.

Detailed Description

In one embodiment, the movable lid may be swingable between a closing position for closing the discharge port and an opening position for opening the discharge port. However, the connection structure between the main body and the movable cover is not particularly limited. As another embodiment, the movable lid may be connected to the main body so as to be slidable between the closed position and the open position.

In one embodiment, when the movable lid is in the closing position, the movable lid may be engaged with the grass-collecting box to prohibit the grass-collecting box from being detached from the main body. In addition to this, or alternatively, when the movable lid is in the open position, the movable lid may not be engaged with the grass-collecting box, allowing the grass-collecting box to be detached from the main body. With this configuration, the user can fix the grass-collecting box to the main body or release the fixation of the grass-collecting box only by opening and closing the movable cover.

In one embodiment, the lawn mower may further include: an urging member that urges the movable lid from the closing position toward the opening position; and a locking mechanism for locking the movable cover with respect to the grass-collecting box when the movable cover is at the closing position. With this configuration, the user can open the movable lid only by unlocking the lock mechanism. Further, when the movable lid is not correctly locked, the movable lid automatically moves to the open position, and thus it is possible to notify the user that the movable lid is not correctly locked.

In the above embodiment, the lock mechanism may have an unlocking operation portion that is operated by a user to unlock the movable lid from the grass collecting box. With this configuration, the user can unlock the lock mechanism by operating the unlock operation unit, and can easily open the movable lid.

In the above embodiment, the grass-collecting box may have a handle to be held by a user. In this case, the unlocking operation portion may be provided at or near the handle. With this configuration, when the user removes the grass collecting box from the main body, the user can release the lock of the lock mechanism while gripping the handle of the grass collecting box.

In one embodiment, the body may also include a cutter unit provided with a cutter, and a handle unit swingably connected to the cutter unit with respect to the cutter unit. In this case, the grass-collecting box may be detachably attached to the handle unit. With this configuration, since the grass-collecting box is disposed along the handle unit, the grass-collecting box can be designed to be relatively large along the longitudinal direction of the handle unit.

In the above embodiment, the main body may further include a grass collecting duct for guiding grass cut by the cutter to the grass collecting box. In this case, at least a part of the grass collecting duct may be provided in the handle unit. According to this configuration, grass cut by the cutter can be reliably accommodated in the grass-collecting box attached to the handle unit.

In the above embodiment, the main body may further include a cleaning port provided at an intermediate position of the grass collecting duct, and a movable cover for opening and closing the cleaning port. In this case, when the grass-collecting box is attached to the main body, the grass-collecting box is preferably engaged with the movable cover, and the movable cover is preferably fixed to a position where the cleaning opening is closed. Further, it is preferable that when the grass collecting box is detached from the main body, the engagement between the grass collecting box and the movable cover is released, and the movable cover can open the cleaning opening. With this configuration, the user can fix or release the movable cover by attaching or detaching the grass collecting box to or from the main body.

[ examples ] A method for producing a compound

An embodiment of the lawn mower 10 is explained with reference to the drawings. The lawn mower 10 is a power device for gardening and is mainly used for trimming a lawn. The mower 10 of the present embodiment is not particularly limited, but is a small mower mainly intended for home use, and is required to be easy to handle and easy to maintain for most users. However, the technology disclosed in the present specification is not limited to the home-oriented lawnmower 10, and can be applied to various types of lawnmowers as well. For example, the lawnmower 10 of the present embodiment is a hand-push type lawnmower operated by a user, and as another embodiment, the lawnmower 10 may be a lawnmower that is at least partially capable of autonomous traveling.

As shown in fig. 1 and 2, the lawnmower 10 includes: a main body 14 having a pair of wheels 12; a cutter 16 provided to the body 14 and used to trim grass growing on the ground; and a grass collection box 18 that collects grass cut by the cutter 16. The grass-collecting box 18 is detachably attached to the main body 14, and when a user removes the collected grass, the grass-collecting box 18 can be detached from the main body 14. The grass-collecting box 18 is provided with a handle 19 to be held by a user. Here, the lawnmower 10 of the present embodiment has two wheels 12, but the number of the wheels 12 is not limited to two. The main body 14 of the mower 10 may include at least one wheel 12.

The main body 14 includes a cutter unit 20 provided with the cutter 16 and a handle unit 22 swingably connected to the cutter unit 20 with respect to the cutter unit 20. The cutter 16 is mounted to the bottom of the cutter unit 20 in such a manner as to oppose a lawn growing on the ground. As shown in fig. 2, the cutter unit 20 has a motor 26 that drives the cutter 16, and a blower fan 28 that is driven by the motor 26. As an example, the cutter 16 in the present embodiment is configured to have a fixed blade 16a fixed to the cutter unit 20 and a driving blade 16b driven by the motor 26, and to cut a lawn by the pair of

blades

16a, 16 b. However, the structure of the cutter 16 is not particularly limited. Instead of the metallic blade, the cutter 16 may be a cutter having a linear body such as a nylon cord, or may be a cutter having a linear body such as a nylon cord as well as a metallic blade. The motor for driving the cutter 16 is not limited to the motor 26. Instead of the motor 26, the lawnmower 10 may include, for example, an engine as a prime mover for driving the cutter 16, or the lawnmower 10 may include, for example, an engine as a prime mover for driving the cutter 16 in addition to the motor.

The handle unit 22 extends upward from the cutter unit 20. As described above, the handle unit 22 can swing with respect to the cutter unit 20. The pivot axis of the handle unit 22 is parallel to the rotation axes of the pair of wheels 12. An operating knob 30 to be held by a user is provided on the top of the handle unit 22. Generally, a user stands behind the lawnmower 10, and holds the operation handle 30 to operate the lawnmower 10. A trigger switch 32 for activating the motor 26 is provided on the operating handle 30. The trigger switch 32 is electrically connected to the motor 26, and when the user operates the trigger switch 32, electric power is supplied to the motor 26 to drive the cutter 16.

The grass-collecting box 18 is configured to be detachable from the handle unit 22. The body 14 is provided with a grass collecting duct 24, and the grass collecting duct 24 guides grass cut by the cutter 16 to the grass collecting box 18 (see fig. 2). A grass collecting duct 24 extends throughout both the cutter unit 20 and the handle unit 22, and is connected to an upper portion of the grass collecting box 18. As described above, the cutter unit 20 includes the blower fan 28 driven by the motor 26. The blower fan 28 not only cools the motor 26 but also creates an air flow for transporting grass within the grass collecting duct 24. Further, the specific structure of the grass collecting duct 24 is not particularly limited. As an example, in the present embodiment, most of the grass collecting duct 24 is provided in the handle unit 22, and the grass collecting duct 24 extends along the longitudinal direction of the handle unit 22.

As described above, in the lawnmower 10 according to the present embodiment, the grass collecting box 18 is attached to the handle unit 22. With this configuration, since the grass-collecting box 18 is disposed along the handle unit 22, the grass-collecting box 18 can be designed to be relatively large along the longitudinal direction of the handle unit 22. Further, by swinging the grass collecting box 18 together with the handle unit 22, the grass in the grass collecting box 18 can be leveled.

Next, the structure of the grass collecting box 18 will be described with reference to fig. 3 to 5. The grass-collecting box 18 is provided with a discharge port 40, and the discharge port 40 is used for discharging the collected grass in a state that the grass-collecting box 18 is detached from the main body 14. The main body 14 is provided with a movable cover 42, and the movable cover 42 is configured to close the discharge port 40 of the grass collecting box 18 when the grass collecting box 18 is attached to the main body 14. With this structure, when the grass-collecting box 18 is detached from the main body 14, the movable cover 42 remains on the main body 14. Therefore, when the user removes grass in the grass collecting box 18, the user is not hindered by the movable cover 42. The user can easily remove grass from the grass-collecting box 18.

Further, the larger the discharge port 40 of the grass collecting box 18, the easier it is for the user to remove grass from the grass collecting box 18. However, if the discharge port 40 of the grass-collecting box 18 is made large, the movable cover 42 needs to be made large. In this regard, if the movable lid 42 is provided in the grass collecting box 18, the large movable lid 42 may become an obstacle, and the operability of the user may be deteriorated. In contrast, if the movable lid 42 is provided on the main body 14, the operation of the user is not hindered by the movable lid 42 regardless of the size of the movable lid 42. Therefore, the discharge port 40 of the grass-collecting box 18 and the movable cover 42 thereof can be designed to be large.

The specific structure of the movable lid 42 is not particularly limited. As an example, in the present embodiment, the movable lid 42 is configured to be swingable between a closing position (see fig. 3) for closing the discharge port 40 and an opening position (see fig. 4 and 5) for opening the discharge port 40. When the movable lid 42 moves to the open position, the handle unit 22 comes into contact with the movable lid 42 and functions as a stopper for stabilizing the movable lid 42. In another embodiment, the movable lid 42 may be slid between a position where the discharge port 40 is closed and a position where the discharge port is opened, for example.

As shown in fig. 4 and 5, a frame (japanese リム)43 is provided in the movable lid 42 as an example. The frame 43 is provided along the peripheral edge of the movable lid 42, and the frame 43 fits into the discharge port 40 of the grass box 18 when the movable lid 42 is in the closed position. Thus, when the movable lid 42 is at the closing position (see fig. 3), the movable lid 42 is engaged with the grass collecting box 18, and the grass collecting box 18 is prohibited from being detached from the main body 14. On the other hand, when the movable lid 42 is in the open position (see fig. 4 and 5), the movable lid 42 is not engaged with the grass collecting box 18, and therefore the grass collecting box 18 is allowed to be detached from the main body 14. With this configuration, the user can fix or release the grass-collecting box 18 to or from the main body 14 by opening or closing the movable cover 42. Here, the frame 43 of the movable lid 42 is an example of a structure for engaging the movable lid 42 with the grass collecting box 18, and may be changed to another structure having such a function.

As shown in fig. 3 to 5, the lawnmower 10 further includes a torsion coil spring 44 and a lock mechanism 46, as an example. The torsion coil spring 44 is disposed coaxially with the pivot of the movable lid 42, and is configured to urge the movable lid 42 from the closing position (see fig. 3) toward the opening position (fig. 4 and 5). The lock mechanism 46 is configured such that when the movable lid 42 is at the closing position, the lock mechanism 46 locks (fixes) the movable lid 42 to the grass collecting box 18. With this structure, the user can open the movable lid 42 by simply unlocking the lock mechanism 46. This also releases the fixation of the grass-collecting box 18 to the main body 14. Further, when the movable lid 42 is not correctly locked, the movable lid 42 automatically moves to the open position, and thus it is possible to notify the user that the movable lid 42 is not correctly locked. Here, the torsion coil spring 44 is an example of an urging member for urging the movable lid 42 from the closed position to the open position, and the torsion coil spring 44 may be changed to another urging member having such a function. In this case, the biasing member may be a separate member or may be a member (i.e., a part) integrally formed with the main body 14 or the movable cover 42.

The specific structure of the lock mechanism 46 is not particularly limited. As an example, the locking mechanism 46 in the present embodiment includes a hook portion 46a provided on the movable cover 42 and a hook receiving portion 46b provided on the grass-collecting box 18. The hook receiving portion 46b is attached to the grass collecting box 18 so as to be able to swing with respect to the grass collecting box 18, and the hook receiving portion 46b is able to engage with and disengage from the hook portion 46a of the movable cover 42. The hook receiving portion 46b and the hook receiving portion 46b are integrally provided with an unlocking operation portion 46c operated by a user. When the user operates the unlocking operation portion 46c, the hook receiving portion 46b swings to release the engagement between the hook portion 46a and the hook receiving portion 46 b. That is, the lock of the lock mechanism 46 is released. In this way, the user can unlock the movable lid 42 by the lock mechanism 46 by simply operating the unlock operating portion 46c, and can easily open the movable lid 42.

The unlocking operation portion 46c is provided on the handle 19 of the grass collecting box 18. With this configuration, the user can directly detach the grass collecting box 18 from the main body 14 by operating the unlocking operation portion 46c while holding the handle 19. Here, the specific structure of the unlocking operation portion 46c is not particularly limited. For example, the unlock operating portion 46c in the present embodiment is located at the upper end of the handle 19 and can be operated by the thumb of the hand gripping the handle 19. In another embodiment, for example, the unlock operating portion 46c may be a trigger type operating portion that is operated by the index finger of the hand gripping the grip 19.

As shown in fig. 5 and 6, the grass-collecting box 18 is provided with a collecting port 48 continuously extending from the discharge port 40. When the grass-collecting box 18 is mounted to the main body 14, the collecting port 48 is connected to the grass-collecting duct 24. Thus, grass cut by the cutter 16 is guided along the grass collecting duct 24 and received in the grass collecting box 18 from the collecting port 48. The collection port 48 is distinguished from the discharge port 40 closed by the movable cover 42, but when the user removes grass from the grass collection box 18, the grass in the grass collection box 18 can be discharged from the collection port 48.

There is a concern that grass or other foreign matter may clog in the grass collecting duct 24. Therefore, as shown in fig. 6 and 7, the main body 14 includes: a cleaning opening 50 provided at an intermediate position of the grass collecting duct 24; and a movable cover 52 for opening the cleaning port 50 and closing the cleaning port 50. Thus, the user can clean the inside of the grass collecting duct 24 from the cleaning port 50 by opening the movable cover 52. As an example, the movable hood 52 in the present embodiment has a knob 53 to be operated by the user, and the movable hood 52 is swingably supported by the main body 14. The cleaning opening 50 and the movable cover 52 may be provided in either the blade unit 20 or the handle unit 22, or in both the blade unit 20 and the handle unit 22.

The movable cover 52 is provided with a 1 st engaging portion 54, the main body 14 is provided with a 2 nd engaging portion 56, and the grass-collecting box 18 is provided with a 3 rd engaging portion 58. The 1 st engaging portion 54 is provided at the distal end of the movable cover 52, and when the movable cover 52 is closed, the 1 st engaging portion 54 of the movable cover 52 is adjacent to the 2 nd engaging portion 56 of the main body 14. When the grass collecting box 18 is attached to the main body 14, the 3 rd engaging portion 58 of the grass collecting box 18 engages with the 1 st engaging portion 54 and the 2 nd engaging portion 56, and the movable cover 52 is fixed to a position where the cleaning opening 50 is closed. On the other hand, when the grass collecting box 18 is detached from the main body 14, the 3 rd engaging portion 58 is disengaged from the 1 st engaging portion 54 and the 2 nd engaging portion 56, and the movable cover 52 is in a state in which the cleaning opening 50 can be opened. As described above, in the lawnmower 10 according to the present embodiment, when the grass collecting box 18 is attached to the main body 14, the movable cover 52 is fixed at a position where the cleaning opening 50 is closed by engaging the grass collecting box 18 with the movable cover 52. With this configuration, the user can fix the movable cover 52 to the closed position or release the fixation by attaching and detaching the grass collecting box 18 to and from the main body 14.

For example, when the movable cover 52 is closed, the 1 st engaging portion 54 of the movable cover 52 and the 2 nd engaging portion 56 of the main body 14 are integrated into one shaft shape. The 3 rd engaging portion 58 of the grass-collecting box 18 has a concave curved surface that partially surrounds the shaft shape (i.e., the 1 st engaging portion 54 and the 2 nd engaging portion 56). According to such a configuration, when the grass-collecting box 18 is attached to and detached from the main body 14, the grass-collecting box 18 can swing with respect to the main body 14 with the 1 st engaging portion 54 and the 2 nd engaging portion 56, which are formed in the shape of shafts, as fulcrums. This allows the user to easily attach and detach the grass collecting box 18 to and from the main body 14.

Although specific examples have been described in detail above, these are merely examples and do not limit the scope of the claims. The techniques described in the claims include those obtained by applying various modifications and alterations to the specific examples illustrated above. The technical elements described in the specification or the drawings exhibit technical usefulness alone or in various combinations.

Claims

1. A lawn mower, wherein,

this lawn mower includes: a body having a wheel;

a cutter provided to the body for trimming grass growing on the ground; and

a grass collection box detachably attached to the body, the grass collection box collecting grass cut by the cutter,

the grass collecting box has a discharge port for discharging the collected grass in a state where the grass collecting box is detached from the main body,

the body has a movable cover that closes the discharge port of the grass collecting box in a state where the grass collecting box is attached to the body.

2. The lawn mower of claim 1,

the movable cover is connected to the main body so as to be capable of swinging between a closed position for closing the discharge port and an open position for opening the discharge port.

3. The lawn mower of claim 2,

when the movable lid is at the closing position, the movable lid engages with the grass collecting box to prohibit the grass collecting box from being detached from the main body,

when the movable cover is in the open position, the movable cover is not engaged with the grass collecting box, and the grass collecting box is allowed to be detached from the main body.

4. The mower of claim 2 or 3,

this lawn mower still includes:

an urging member that urges the movable lid from the closing position toward the opening position; and

and a locking mechanism for locking the movable cover with respect to the grass-collecting box when the movable cover is in the closing position.

5. The lawn mower of claim 4,

the locking mechanism has an unlocking operation part operated by a user to unlock the movable cover and the grass collecting box.

6. The mower of claim 5 wherein

The grass-collecting box is provided with a handle held by a user,

the unlocking operation portion is provided at the handle or in the vicinity of the handle.

7. The lawn mower of any of claims 1-6,

the body includes a cutter unit provided with the cutter and a handle unit swingably connected to the cutter unit with respect to the cutter unit,

the grass-collecting box is detachably attached to the handle unit.

8. The lawn mower of claim 7,

the body has a grass collecting duct for guiding grass cut by the cutter toward the grass collecting box,

at least a part of the grass collecting pipeline is arranged on the handle unit.

9. The lawn mower of claim 8,

the main body further comprises a cleaning opening provided at an intermediate position of the grass collecting duct and a movable cover for opening and closing the cleaning opening,

when the grass collecting box is mounted on the main body, the grass collecting box is clamped with the movable cover, the movable cover is fixed at a position for blocking the cleaning opening,

when the grass collecting box is detached from the main body, the engagement between the grass collecting box and the movable cover is released, and the movable cover can open the cleaning opening.