CN115250724A - Working machine - Google Patents

Abstract

The invention provides a working machine, which applies a technology capable of restraining damage of an arm part of a handle unit. The work machine includes a work section, a main body case, a handle unit, an operation section, and a protrusion section. The handle unit is movable between a storage position and a working position. The protrusion portion is movable between a restricting position and an unrestricting position in conjunction with an operation of the operation portion by a user. The work machine is configured such that the protrusion restricts movement of the handle unit from the storage position to the work position in a state where the handle unit is located at the storage position and the protrusion is located at the restriction position. When the handle unit is located at the storage position and the projection is located at the restricting position, the projection is moved from the restricting position to the non-restricting position in conjunction with the operation of the operation portion by the user, whereby the handle unit can be moved from the storage position to the working position.

Description

Working machine

Technical Field

The technology disclosed in the present specification relates to a work machine.

Background

Patent document 1 discloses a working machine including: a working unit that contacts the ground; a main body case in which the working section is provided; a handle unit having an arm portion rotatably attached to the main body case and a grip portion which can be gripped by a user; and a protrusion fixed to the main body case.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2006-094796

Disclosure of Invention

Problems to be solved by the invention

In the work machine of patent document 1, the handle unit is movable between a storage position where the arm is placed on the main body case and a working position where the arm is not placed on the main body case. The protrusion restricts the movement of the handle unit from the storage position to the working position in a state where the handle unit is located at the storage position. In the working machine of patent document 1, since the projection is fixed to the main body case, when the handle unit is moved from the working position to the storage position or when the handle unit is moved from the storage position to the working position, the arm portion needs to go over the projection while coming into contact with the projection. Since the projection is fixed to the main body case, the arm portion may be damaged.

In the present specification, a technique capable of suppressing damage to the arm portion of the handle unit is provided.

Means for solving the problems

The work machine disclosed in the present specification operates in contact with the ground. The work machine may include: an operation section; a main body case in which the working unit is provided; a handle unit having an arm portion rotatably attached to the main body case and a grip portion which can be gripped by a user; an operation unit provided in the main body case and operable by a user; and a protrusion provided in the main body case, wherein the handle unit is movable between a storage position where the arm is tilted with respect to the main body case and a working position where the arm is not tilted with respect to the main body case, the protrusion is movable between a restriction position and a restriction position in conjunction with an operation of the operating portion by a user, the restriction position is a position where the protrusion is in contact with the arm of the handle unit when the handle unit is moved from the storage position to the working position, the non-restriction position is a position where the protrusion is not in contact with the arm of the handle unit when the handle unit is moved from the storage position to the working position, and the working machine is configured such that, in a state where the handle unit is located in the storage position and the protrusion is located in the restriction position, the protrusion restricts movement of the handle unit from the storage position to the working position, and, in a state where the handle unit is located in the storage position and the protrusion is located in the restriction position, the protrusion is movable from the restriction position to the non-restriction position in conjunction with the operation of the operating portion by the protrusion, and the protrusion is located in the restriction position, the handle unit is movable from the storage position to the working position.

According to the above configuration, the projection portion can move between the restricting position and the non-restricting position in conjunction with the operation of the operation portion by the user. Therefore, for example, the user can suppress the arm portion from coming into contact with the protrusion portion by moving the handle unit from the working position to the storage position or moving the handle unit from the storage position to the working position after operating the operation portion to move the protrusion portion to the non-restricting position. Thus, damage to the arm portion of the handle unit can be suppressed.

Drawings

Fig. 1 is a perspective view of the lawnmower 2 in the state where the handle unit 6 is located at the working position as viewed from the upper right front in embodiment 1.

Fig. 2 is a right side view of the lawnmower 2 in the state where the handle unit 6 is located at the working position as viewed from the right in embodiment 1.

Fig. 3 is a plan view of the lawnmower 2 in a state where the handle unit 6 is located at the working position in embodiment 1, as viewed from above.

Fig. 4 is a sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a perspective view of the right operation unit 62 of embodiment 1 as viewed from the upper right front.

Fig. 6 is a right side view of the lawnmower 2 in the state where the grass collecting container 12 is detached and the handle unit 6 is located at the storage position as viewed from the right in embodiment 1.

Fig. 7 is a plan view of the lawnmower 2 in a state where the grass collecting container 12 is detached and the handle unit 6 is located at the storage position as viewed from above in embodiment 1.

Fig. 8 is a sectional view taken along line VIII-VIII of fig. 7.

Fig. 9 is a front cross-sectional view of the mower 2 according to embodiment 1, in a state where the left side surface of the 1 st right arm 100 of the handle unit 6 is in contact with the protrusion 78 of the right operation unit 62 and the right side surface of the 1 st left arm 104 is in contact with the protrusion of the left operation unit 64.

Fig. 10 is a front sectional view of the mower 2 according to embodiment 1 in a state where the handle unit 6 is located at the storage position and the right and left operating units 62 and 64 are located at the non-restricting position.

Fig. 11 is a sectional view taken along line XI-XI of fig. 3.

Fig. 12 is a perspective view of the handle unit 110, the 2 nd right arm 102, and the 2 nd left arm 106 of embodiment 1 as viewed from the upper right front.

Fig. 13 is a diagram showing a control structure of the lawnmower 2 according to embodiment 1.

Fig. 14 is a front sectional view of a state where the moving unit 272 on the right side is located at the restricting position in embodiment 2.

Fig. 15 is an upper sectional view of a state where the moving unit 272 on the right side is located at the restricting position in embodiment 2.

Fig. 16 is a front sectional view of a state where the moving unit 272 on the right side is located at the non-restricting position in embodiment 2.

Description of the reference numerals

2. A mower; 4. a main body unit; 6. a handle unit; 8. a wheel; 10. a roller; 12. a grass collecting container; 20. a main body case; 21. 1 st main body case; 22. 2 nd main body case; 24. a battery cover; 26. a cutting knife; 28. a motor; 30. a boss portion; 32. a boss portion; 40. a protrusion; 40a, through holes; 42. a protrusion; 42a, a through hole; 50. a battery pack; 60. an operation unit; 62. a right operation unit; 64. a left operation unit; 66. a spring; 70. an operation unit; 72. a1 st sliding part; 74. a connecting portion; 76. a2 nd sliding part; 78. a protrusion portion; 78a, lower surface; 78b, a flat portion; 78c, an inclined portion; 80. a spring receiving portion; 82. a through hole; 100. 1 st right arm; 100a, one end; 100b, the other end; 102. a2 nd right arm; 104. 1 st left arm; 104a, one end; 104b, the other end; 106. a2 nd left arm; 108. a reinforcing arm; 110. a handle unit; 112. a locking member; 114. a locking member; 120. a handle housing; 122. a rod; 124. an unlock button; 126. an elastic member; 220. a main body case; 220a, a through hole; 260. an operation unit; 262. an operation unit; 264. 1 st shaft part; 266. a rotating part; 268. a clamped part; 270. a clamped part; 272. a mobile unit; 274. a mobile unit; 280. a fastening part; 282. a2 nd shaft part; 284. a sliding part; 286. a shaft coupling part; 288. a protrusion portion; 288a, flat portion; 288b, flat portions; 288c, an inclined portion; 290. a spring; 292. a spring receiving portion; a1, an axis in the length direction; a2, a rotation axis; B. and (4) bolts.

Detailed Description

Hereinafter, representative and non-limiting specific examples of the present invention will be described in detail with reference to the accompanying drawings. The detailed description is merely intended to show those skilled in the art the details of preferred embodiments for practicing the invention, and is not intended to limit the scope of the invention. In addition, the disclosed additional features and aspects may be used independently of or in conjunction with other features and aspects to provide a further improved work machine.

In addition, combinations of features and steps disclosed in the following detailed description are not essential to the practice of the present invention in the broadest sense, and are instead taught merely to particularly describe representative examples of the present invention. Furthermore, in providing additional useful embodiments of the present invention, it is not necessary that the various features of the following representative examples and the various features recited in the claims be combined in the specific examples described herein or in the order of presentation.

All of the features described in the specification and/or claims are intended to be disclosed separately and independently from the structures of the features described in the embodiments and/or claims as limitations on the disclosure of the original application and specific matters described in the claims. Further, all the numerical ranges and descriptions related to organizations or groups are intended to disclose intermediate structures thereof as limitations to specific matters described in the disclosure of the original application and the claims.

In one or more embodiments, the work machine operates in contact with the ground. The work machine may include: a working section; a main body case in which the working unit is provided; a handle unit having an arm portion rotatably attached to the main body case and a grip portion which can be gripped by a user; an operation unit provided in the main body case and operable by a user; and a protrusion provided in the main body case, wherein the handle unit is movable between a storage position where the arm is tilted with respect to the main body case and a working position where the arm is not tilted with respect to the main body case, the protrusion is movable between a restricting position and a non-restricting position in conjunction with an operation of the operating portion by a user, the restricting position is a position where the protrusion is in contact with the arm of the handle unit when the handle unit is moved from the storage position to the working position, the non-restricting position is a position where the protrusion is not in contact with the arm of the handle unit when the handle unit is moved from the storage position to the working position, and the working machine is configured such that, in a state where the handle unit is in the storage position and the protrusion is in the restricting position, the protrusion restricts movement of the handle unit from the storage position to the working position, and, in a state where the handle unit is in the storage position and the protrusion is in the restricting position, the protrusion is movable from the restricting position to the working position by an operation of the protrusion in conjunction with an operation of the user, the protrusion is movable from the restricting position to the working unit from the storage position.

In one or more embodiments, the working machine may further include an urging member that urges the protrusion from the non-restricting position to the restricting position.

Desirably, the protrusion restricts the movement of the handle unit from the storage position to the working position after the handle unit is moved from the working position to the storage position. According to the above configuration, the protrusion is biased to the restricting position by the biasing member in the state where the handle unit is located at the working position. When the handle unit moves from the working position to the storage position, the protrusion moves from the restricting position to the non-restricting position. Then, the arm portion of the handle unit passes through the projection portion, and then the projection portion is moved from the non-restricting position to the restricting position by the urging member. Therefore, although the handle unit is moved from the working position to the storage position, it is possible to suppress occurrence of a situation in which the movement of the handle unit from the storage position to the working position is not restricted. Thus, user convenience can be improved.

In one or more embodiments, the operation portion and the protrusion portion may be integrally formed.

According to the above configuration, the operation portion and the projection portion may not be connected by a connection mechanism or the like. Therefore, the number of components of the work machine can be reduced.

In one or more embodiments, the protrusion may protrude from the main body case in a direction perpendicular to an axis in a longitudinal direction of the arm portion when the handle unit is in the storage position at the restriction position.

According to the above configuration, as compared with a configuration in which the protrusion is inclined with respect to the axis in the longitudinal direction of the arm portion, the movement of the handle unit from the storage position to the working position can be reliably restricted.

In one or more embodiments, an inclined portion may be provided on an upper surface of the protrusion portion, the inclined portion being inclined downward from the non-restricting position side toward the restricting position side in a direction in which the protrusion portion moves between the non-restricting position and the restricting position.

When the inclined portion is not provided on the upper surface of the protruding portion, the user cannot move the handle unit from the operating position to the storage position with the protruding portion located at the restricting position. That is, the user needs to operate the operation portion to move the protrusion portion from the restricting position to the non-restricting position, and then move the handle unit from the operating position to the storage position. According to the above configuration, when the handle unit is moved from the operating position to the storage position in a state where the projection is located at the restriction position, the arm portion of the handle unit comes into contact with the inclined portion on the upper surface of the projection. In this case, the arm portion of the handle unit comes into contact with the inclined portion of the upper surface of the projection portion, and a force acts in a direction in which the projection portion moves from the restricting position to the non-restricting position. Therefore, the protrusion moves from the restricting position to the non-restricting position. Therefore, when the user attempts to move the handle unit from the working position to the storage position with the projecting portion located at the restricting position, the user can move the projecting portion from the restricting position to the non-restricting position without operating the operating portion. Therefore, the user can easily move the handle unit from the working position to the storage position. As a result, the convenience of the user can be improved.

In one or more embodiments, the operating portion may be an operating portion that rotates about a rotation axis, and the protrusion may be movable between the restricting position and the non-restricting position in association with the rotation of the operating portion by the user.

According to the above configuration, the user can move the protrusion by rotating the operation portion. Therefore, the operability of the work machine can be improved.

In one or more embodiments, the working machine may further include a prime mover for driving the working unit.

According to the above configuration, the working unit can be driven more strongly than a configuration in which the working unit is driven in conjunction with the movement of the working machine by the user.

(embodiment 1)

A lawnmower 2 according to embodiment 1 will be described with reference to fig. 1 to 13. The mower 2 operates in contact with the ground. As shown in fig. 1, the mower 2 includes a body unit 4 and a handle unit 6. A pair of wheels 8 is provided at the front of the main body unit 4. As shown in fig. 2, a roller 10 extending in the left-right direction is provided at the rear of the main body unit 4. Further, a grass collecting container 12 is detachably attached to the rear portion of the main unit 4.

(Structure of the body unit 4)

As shown in fig. 1 to 3, the main body unit 4 includes a main body case 20 and a battery cover 24. A cutter 26 is provided at a lower portion of the main body case 20 (see fig. 13). The cutter 26 is opposite to the ground. A motor 28 (see fig. 13) for driving the cutter 26 is accommodated in the main body case 20. The motor 28 may be a brushless DC motor, a brushed DC motor, or another type of motor such as an AC motor. The main body case 20 is composed of a1 st main body case 21 and a2 nd main body case 22. The 2 nd main body case 22 is attached to the 1 st main body case 21 at an upper portion thereof. As shown in fig. 4, boss portions 30 and 32 projecting upward are provided on the upper portion of the 1 st main body case 21. Further, the projecting portions 40, 42 projecting downward are provided at positions of the 2 nd main body case 22 facing the boss portions 30, 32 of the 1 st main body case 21. The projections 40 and 42 are provided with through holes 40a and 42a that penetrate the 2 nd main body case 22 in the vertical direction. The 1 st and 2 nd main body cases 21 and 22 are coupled to each other by screwing bolts B penetrating the through holes 40a and 42a to the boss portions 30 and 32.

As shown in fig. 1 to 3, the battery cover 24 is attached to the rear portion of the 2 nd main body case 22. A battery mounting portion (not shown) is provided inside the battery cover 24. The user can attach and detach the battery pack 50 to and from the main unit 4 by opening the battery cover 24 (see fig. 13).

The main body unit 4 further includes an operation unit 60. As shown in fig. 4, the operation unit 60 includes a right operation unit 62 provided on the right side of the main unit 4, a left operation unit 64 provided on the left side of the main unit 4, and a spring 66. The right and left operation units 62 and 64 are mounted between the 1 st and 2 nd body cases 21 and 22. The right operation unit 62 is in a surface-symmetric relationship with the left operation unit 64 across a plane including the front-rear direction and the up-down direction. Hereinafter, the structure of the right operation unit 62 will be described, and the same reference numerals are given to the same structure of the left operation unit 64 as the right operation unit 62, and the description thereof will be omitted.

As shown in fig. 5, the right operation unit 62 includes an operation portion 70, a1 st slide portion 72, a connection portion 74, a2 nd slide portion 76, a projection portion 78, and a spring receiving portion 80 (see fig. 4). The operation portion 70, the 1 st slide portion 72, the connection portion 74, the 2 nd slide portion 76, the projection portion 78, and the spring receiving portion 80 are integrally formed. The operation unit 70 extends upward from the upper surface of the 1 st sliding unit 72. As shown in fig. 4, the spring receiving portion 80 extends downward from the back surface (the surface on the side opposite to the upper surface) of the 1 st sliding portion 72. As shown in fig. 5, the connecting portion 74 connects the 1 st sliding portion 72 and the 2 nd sliding portion 76. The upper surface of the connecting portion 74 is inclined downward from the left to the right. The upper surface of the 2 nd slide portion 76 is located below the upper surface of the 1 st slide portion 72. The upper surface of the 1 st sliding portion 72 and the upper surface of the 2 nd sliding portion 76 are parallel to a plane including the front-rear direction and the left-right direction. The projection 78 extends rightward from the right end of the 2 nd sliding portion 76. The lower surface 78a of the projection 78 has a shape corresponding to the 1 st right arm 100 of the handle unit 6 described later. The upper surface of the projection 78 is constituted by a flat portion 78b and an inclined portion 78c. The flat portion 78b is parallel to a plane including the front-rear direction and the left-right direction. The inclined portion 78c is inclined downward as going from the inside toward the outside. For example, the inclined portion 78c at the right end of the projection 78 is inclined downward from the left to the right. The connecting portion 74 and the 2 nd sliding portion 76 are provided with through holes 82 extending in the left-right direction. The width of the through hole 82 in the front-rear direction is larger than the width of the protrusion 40 (see fig. 4) of the 2 nd main body case 22 in the front-rear direction.

The mounting step of the right operation unit 62 to the main body case 20 will be described with reference to fig. 4. First, the right operation unit 62 is placed on the 1 st main body case 21 such that the through hole 82 of the right operation unit 62 is positioned above the boss portion 30 of the 1 st main body case 21. Then, the boss portion 30 of the 1 st main body case 21 and the protruding portion 40 of the 2 nd main body case 22 located below the through hole 82 are aligned, and the bolt B is screwed to the boss portion 30. Thus, the right operation unit 62 is attached to the main body case 20. Since the width of the through hole 82 in the front-rear direction is larger than the width of the protruding portion 40 of the 2 nd main body case 22 in the front-rear direction, the right operation unit 62 can slide in the left-right direction. Through the same procedure, the left operation unit 64 can be attached to the main body casing 20.

The spring 66 is provided between the spring receiving portion 80 of the right operation unit 62 on the right side and the spring receiving portion 80 of the left operation unit 64 on the left side in the left-right direction. The spring 66 biases the right operation unit 62 from a position (hereinafter, referred to as a "non-restricting position") where the protrusion 78 of the right operation unit 62 does not contact the 1 st right arm 100 of the handle unit 6 (see fig. 10) to a position (hereinafter, referred to as a "restricting position") where the protrusion 78 contacts the 1 st right arm 100 (see fig. 4 and 8). Further, at the restricting position, the protrusion 78 protrudes rightward from the main body case 20. In the non-limiting position, the protrusion 78 may be completely accommodated in the main body case 20, or may partially protrude rightward from the main body case 20. In addition, the inclined portion 78c of the upper surface of the protruding portion 78 is inclined downward as going from the non-restricting position side toward the restricting position side in a direction in which the protruding portion 78 moves between the restricting position and the non-restricting position (in the present embodiment, the left-right direction).

(Structure of handle unit 6)

As shown in fig. 1 to 3, 8 to 10, and 12, the handle unit 6 includes a1 st right arm 100, a2 nd right arm 102 (see fig. 12), a1 st left arm 104, a2 nd left arm 106 (see fig. 12), a reinforcing arm 108, and a grip unit 110. One end 100a of the 1 st right arm 100 and one end 104a of the 1 st left arm 104 are rotatably attached to the main unit 4. The handle unit 6 is movable between a storage position (see fig. 6 and 7) where the 1 st right arm 100 and the 1 st left arm 104 are tilted with respect to the main body case 20, and a working position (see fig. 1 to 3) where the 1 st right arm 100 and the 1 st left arm 104 are not tilted with respect to the main body case 20. For example, in the working position, the handle unit 110 is located behind the main body casing 20 and above the main body casing 20. In the storage position, for example, the handle unit 110 is positioned forward of the main body case 20.

The other end 100b of the 1 st right arm 100 is provided with a lock member 112, and the other end 104b of the 1 st left arm 104 is provided with a lock member 114. As shown in fig. 8, the 2 nd right arm 102 is accommodated inside the 1 st right arm 100. The 2 nd left arm 106 is housed inside the 1 st left arm 104. As shown in fig. 12, the handle unit 110 is mounted to the 2 nd right arm 102 and the 2 nd left arm 106. The operator can pull out the 2 nd right arm 102 and the 2 nd left arm 106 from the 1 st right arm 100 and the 1 st left arm 104 by operating the lock members 112, 114 from the lock positions to the unlock state and pulling up the handle unit 110. As shown in fig. 1-3, the reinforcing arm 108 extends in the left-right direction between the locking members 112, 114.

The handle unit 110 includes a handle housing 120, a lever 122, and an unlocking button 124. When the worker pulls up the lever 122 in a state where the unlock button 124 is pressed, electric power is supplied from the battery pack 50 (see fig. 13) to the motor 28 (see fig. 13). On the other hand, in a state where the operator does not press the unlock button 124, even if the lever 122 is pulled up, power is not supplied from the battery pack 50 (see fig. 13) to the motor 28 (see fig. 13). That is, when the operator pulls up the lever 122 with the unlock button 124 pressed, the cutting blade 26 (see fig. 13) is driven.

As shown in fig. 11, an elastic member 126 such as rubber is provided inside the handle case 120 between the handle case 120 and the unlock button 124. Water can be prevented from infiltrating into the handle housing 120 by the elastic member 126.

Next, a procedure for moving the handle unit 6 from the working position (see fig. 1 to 3) to the storage position (see fig. 6 and 7) will be described with reference to fig. 4 and 8 to 10. Hereinafter, the operations of the 1 st right arm 100 of the handle unit 6 and the right operation unit 62 of the operation unit 60 will be described, and the operations of the 1 st left arm 104 and the left operation unit 64 will be similar.

The user tilts the handle unit 6 in the state shown in fig. 1 to 3 toward the main unit 4 (specifically, the main body case 20). Then, the 1 st right arm 100 of the handle unit 6 comes into contact with the right end portion (i.e., the inclined portion 78 c) of the upper surface of the protrusion portion 78 of the operation unit 60. In this case, a force acts in a direction (i.e., leftward) in which the protrusion 78 moves from the restricting position to the non-restricting position. Thereby, as shown in fig. 9, the protrusion 78 moves to the non-restricting position. Then, as shown in fig. 8, the 1 st right arm 100 passes through the projection 78. After the 1 st right arm 100 passes the projection 78, the projection 78 moves from the non-restricting position to the restricting position by the spring 66. In this way, the handle unit 6 is moved from the working position to the storage position.

Next, a procedure for moving the handle unit 6 from the storage position (see fig. 6 and 7) to the working position (see fig. 1 to 3) will be described with reference to fig. 4, 8, and 10. Hereinafter, the operations of the 1 st right arm 100 of the handle unit 6 and the right operation unit 62 of the operation unit 60 will be described, and the operations of the 1 st left arm 104 and the left operation unit 64 will be similar.

As described above, the projection 78 extends rightward from the right end of the 2 nd sliding portion 76. That is, in a state where the handle unit 6 is located at the storage position and the projection 78 is located at the restriction position, the projection 78 extends in a direction perpendicular to the axis A1 (see fig. 7) in the longitudinal direction of the 1 st right arm 100. In this case, the projection 78 restricts the movement of the handle unit 6 from the storage position to the working position. Therefore, in the state of fig. 6 to 8, the user cannot pull up the handle unit 6 from the main body case 20 by gripping the grip case 120 of the handle unit 6.

First, the user operates the operation section 70 of the right operation unit 62 in the left direction. Further, the user operates the operation portion 70 of the left operation unit 64 to the right while operating the operation portion 70 of the right operation unit 62. As shown in fig. 10, the projection 78 moves leftward in conjunction with the operation of the operation unit 70 by the user, and moves from the restricting position to the non-restricting position. Thereby, the user can grip the grip housing 120 of the handle unit 6 and pull up the handle unit 6 from the main body housing 20. That is, the handle unit 6 can be moved from the storage position to the working position. After the handle unit 6 passes the projection 78, the user takes his hand off the operation portion 70. In this case, as shown in fig. 4, the protrusion 78 is moved from the non-restricting position to the restricting position by the spring 66. In this way, the handle unit 6 is moved from the storage position to the working position. Further, in the present embodiment, the direction in which the user operates the operation portion 70 coincides with the direction in which the protrusion portion 78 moves. Therefore, the user can easily grasp the direction in which the protrusion 78 moves.

As described above, as shown in fig. 1 to 13, the lawnmower 2 according to one embodiment includes: a cutting knife 26; a main body case 20, in which a cutter blade 26 is provided; a handle unit 6 having a1 st right arm 100 and a1 st left arm 104 rotatably attached to the main body case 20, and a grip unit 110 that can be gripped by a user; an operation unit 70 provided in the main body case 20 and operable by a user; and a protrusion 78 provided on the main body case 20. The handle unit 6 is movable between a storage position (see fig. 6 and 7) where the 1 st right arm 100 and the 1 st left arm 104 are tilted with respect to the main body case 20, and a working position (see fig. 1 to 3) where the 1 st right arm 100 and the 1 st left arm 104 are not tilted with respect to the main body case 20. The projection 78 is movable in conjunction with the operation of the operation portion 70 by the user between a restricting position (see fig. 8) at which the projection 78 comes into contact with the 1 st right arm 100 and the 1 st left arm 104 of the handle unit 6 when the handle unit 6 moves from the storage position to the working position, and an unrestricting position (see fig. 10) at which the projection 78 does not come into contact with the 1 st right arm 100 and the 1 st left arm 104 of the handle unit 6 when the handle unit 6 moves from the storage position to the working position. In a state where the handle unit 6 is located at the storage position and the projection 78 is located at the restriction position (see fig. 8), the projection 78 restricts the movement of the handle unit 6 from the storage position to the working position. As shown in fig. 10, in a state where the handle unit 6 is located at the storage position and the projection 78 is located at the restricting position, the projection 78 is moved from the restricting position to the non-restricting position in conjunction with the operation of the operation portion 70 by the user, whereby the handle unit 6 can be moved from the storage position to the working position. According to the above configuration, the protrusion 78 can move between the restricting position and the non-restricting position in conjunction with the operation of the operation unit 70 by the user. Therefore, for example, the user can suppress the 1 st right arm 100 and the 1 st left arm 104 from coming into contact with the projecting portion 78 by operating the operating portion 70 to move the projecting portion 78 to the non-restricting position, and then moving the handle unit 6 from the working position to the storage position or moving the handle unit 6 from the storage position to the working position. Thus, damage to the 1 st right arm 100 and the 1 st left arm 104 of the handle unit 6 can be suppressed.

In addition, when the protrusion is fixed to the main body case 20, the 1 st right arm 100 and the 1 st left arm 104 need to go over the protrusion. In this case, in order for the 1 st right arm 100 and the 1 st left arm 104 to pass over the protrusion, the 1 st right arm 100 and the 1 st left arm 104 need to be deformed. According to the above configuration, the 1 st right arm 100 and the 1 st left arm 104 do not have to go over the protrusion 78. Therefore, the 1 st right arm 100 and the 1 st left arm 104 can be made less likely to deform. For example, the 1 st right arm 100 and the 1 st left arm 104 may be made less likely to deform by adjusting the position of the reinforcing arm 108 to a position close to the main body casing 20 side, or the 1 st right arm 100 and the 1 st left arm 104 may be made less likely to deform by increasing the rigidity of the 1 st right arm 100 and the 1 st left arm 104. That is, the durability of the 1 st right arm 100 and the 1 st left arm 104 can be improved.

As shown in fig. 4, the lawnmower 2 according to one embodiment includes a spring 66 that biases the protrusion 78 from the non-restricting position to the restricting position. Desirably, the projection 78 restricts the movement of the handle unit 6 from the storage position to the working position after the handle unit 6 is moved from the working position to the storage position. According to the above configuration, the protrusion 78 is biased to the restricting position by the spring 66 in the state where the handle unit 6 is located at the working position. When the handle unit 6 moves from the working position to the storage position, the protrusion 78 moves from the restricting position to the non-restricting position. Then, the 1 st right arm 100 and the 1 st left arm 104 of the handle unit 6 pass the projecting portion 78, and thereafter, the projecting portion 78 is moved from the non-restricting position to the restricting position by the spring 66. Therefore, although the handle unit 6 is moved from the working position to the storage position, it is possible to suppress occurrence of a situation in which the movement of the handle unit 6 from the storage position to the working position is not restricted. Thus, user convenience can be improved.

In the mower 2 according to the embodiment, as shown in fig. 5, the operation portion 70 and the protrusion 78 are integrally formed. According to the above configuration, the operation portion 70 and the projection portion 78 may not be connected by a connection mechanism or the like. Therefore, the number of components of the mower 2 can be reduced.

In the mower 2 according to the embodiment, as shown in fig. 7, in the restricting position, the protrusion 78 protrudes from the main body case 20 in a direction perpendicular to the axis A1 in the longitudinal direction of the 1 st right arm 100 and the 1 st left arm 104 when the handle unit 6 is in the storage position. According to the above configuration, as compared with the configuration in which the protrusion 78 is inclined with respect to the axis A1 in the longitudinal direction of the 1 st right arm 100 and the 1 st left arm 104, the movement of the handle unit 6 from the storage position to the working position can be reliably restricted.

In the lawnmower 2 according to one embodiment, as shown in fig. 4, an inclined portion 78c is provided on the upper surface of the protrusion portion 78, and the inclined portion 78c is inclined downward in a direction in which the protrusion portion 78 moves from the non-restricting position to the restricting position (in the present embodiment, in the left-right direction) as going from the non-restricting position side to the restricting position side. When the inclined portion 78c is not provided on the upper surface of the projection portion 78, the user cannot move the handle unit 6 from the working position to the storage position with the projection portion 78 positioned at the regulation position. That is, the user needs to operate the operation portion 70 to move the protrusion 78 from the restricting position to the non-restricting position, and then move the handle unit 6 from the working position to the storage position. According to the above configuration, when the handle unit 6 is moved from the working position to the storage position in a state where the projection 78 is located at the restriction position, the 1 st right arm 100 and the 1 st left arm 104 of the handle unit 6 come into contact with the inclined portion 78c on the upper surface of the projection 78. In this case, a force acts in a direction to move the protrusion 78 from the restricting position to the non-restricting position. Therefore, the protrusion 78 moves from the restricting position to the non-restricting position. Therefore, when the handle unit 6 is to be moved from the working position to the storage position with the projecting portion 78 positioned at the restricting position, the user can move the projecting portion 78 from the restricting position to the non-restricting position without operating the operation portion 70. Therefore, the user can easily move the handle unit 6 from the working position to the storage position. As a result, the convenience of the user can be improved.

As shown in fig. 13, the mower 2 of one embodiment includes a motor 28 that drives the cutting blade 26. According to the above configuration, the cutter 26 can be driven more strongly than the configuration in which the cutter 26 is driven in conjunction with the movement of the lawnmower 2 by the user.

(corresponding relationship)

The mower 2 is an example of a "work machine". The cutter 26 is an example of a "working unit". The 1 st right arm 100 and the 1 st left arm 104 are an example of an "arm portion". The handle unit 110 is an example of a "grip portion". The spring 66 is an example of the "urging member". The motor 28 is an example of a "prime mover".

(embodiment 2)

Next, a mower according to embodiment 2 will be described with reference to fig. 14 to 16. The structures of the main body case 220 and the operation unit 260 of the lawnmower of the 2 nd embodiment are different from the structures of the main body case 20 and the operation unit 60 of the lawnmower 2 of the 1 st embodiment. Hereinafter, only the main body case 220 and the operation unit 260 of embodiment 2 will be described.

As shown in fig. 14 to 16, a through hole 220a penetrating the main body case 220 in the left-right direction is provided in the right portion of the main body case 220.

As shown in fig. 14 and 15, the operation unit 260 is attached to the main body casing 220. The operation unit 260 includes an operation portion 262, a1 st shaft portion 264, a rotation portion 266, two engaged portions 268 and 270, and two moving units 272 and 274. As shown in fig. 14, the operation portion 262 is a member rotatable about a rotation axis A2. The 1 st shaft portion 264 is coupled to a lower portion of the operation portion 262. The 1 st shaft portion 264 passes through a through hole (not shown) provided in an upper portion of the main body case 220. As shown in fig. 15, the rotation portion 266 extends in the front-rear direction from the 1 st shaft portion 264. An engaged portion 268 is provided at a front end portion of the rotating portion 266, and an engaged portion 270 is provided at a rear end portion of the rotating portion 266. The engaged portions 268 and 270 are members with which the moving units 272 and 274 are engaged.

The moving unit 272 is movable between the positions shown in fig. 14 and 15 and the position shown in fig. 16, which will be described in detail later. The movement unit 272 at the position shown in fig. 14 and 15 will be described below. The shape of the moving element 272 is in a plane-symmetric relationship with the moving element 274 across a plane including the front-rear direction and the up-down direction. Hereinafter, the structure of the right moving means 272 will be described, and the description of the left moving means 274 will be omitted. The moving unit 272 includes an engaging portion 280, a2 nd shaft portion 282, a sliding portion 284, a spring 290, and a spring receiving portion 292. The engaging portion 280 engages with the engaged portion 268. The 2 nd shaft part 282 extends rightward from the right end of the engaging part 280. The right end of the 2 nd shaft part 282 is coupled to the sliding part 284. The sliding portion 284 includes a shaft coupling portion 286 and a protrusion portion 288. The shaft coupling portion 286 is coupled to the 2 nd shaft portion 282. The protrusion 288 extends rightward from the right end of the shaft coupling portion 286. The lower surface of the projection 288 is constituted by a flat portion 288 a. Further, the lower surface of the protrusion 288 may have a shape corresponding to the 1 st right arm 100 of the handle unit 6. The upper surface of the protruding portion 288 is constituted by a flat portion 288b and an inclined portion 288 c. The flat portions 288a, 288b are parallel to a plane including the front-rear direction and the left-right direction. The inclined portion 288c is inclined downward as it goes from the inside toward the outside. The spring receiving portion 292 is provided between the 1 st shaft portion 264 and the shaft coupling portion 286 in the left-right direction. The spring receiver 292 is fixed in the main body case 220. A spring 290 is provided between the shaft coupling portion 286 and the spring receiving portion 292. The spring 290 biases the moving unit 272 from a position (hereinafter, referred to as a "non-restricting position") where the protrusion 288 does not contact the 1 st right arm 100 of the handle unit 6 (see fig. 16) to a position (hereinafter, referred to as a "restricting position") where the protrusion 288 contacts the 1 st right arm 100 of the handle unit 6 (see fig. 14 and 15).

Next, a procedure for moving the handle unit 6 of embodiment 2 from the working position to the storage position will be described with reference to fig. 14 to 16. The following describes the operation of the 1 st right arm 100 and the right moving means 272, and the same applies to the operation of the 1 st left arm 104 and the left moving means 274.

The user tilts the handle unit 6 in the state of fig. 14 and 15 toward the main body unit 4 (specifically, the main body case 220). Then, the 1 st right arm 100 of the handle unit 6 comes into contact with the right end portion (i.e., the inclined portion 288 c) of the upper surface of the protruding portion 288 of the moving unit 272. In this case, a force acts in a direction (i.e., leftward) in which the projecting portion 288 moves from the restricting position to the non-restricting position. Thereby, the moving unit 272 rotates in the 1 st circumferential direction V1 (see fig. 15). Then, the projecting portion 288 moves to the non-restricting position (see fig. 16). Thus, the 1 st right arm 100 passes through the protrusion 288. After the 1 st right arm 100 passes the protrusion 288, the operation portion 262 is rotated in the 2 nd circumferential direction V2 (see fig. 15) by the spring 290. Then, the projecting portion 288 moves from the non-restricting position to the restricting position (see fig. 14 and 15). In this way, the handle unit 6 is moved from the working position to the storage position. In the non-limiting position, the protrusion 288 may be completely accommodated in the main body housing 220, or may partially protrude rightward from the main body housing 220 (specifically, the through hole 220 a).

Next, a procedure for moving the handle unit 6 of embodiment 2 from the storage position to the working position will be described with reference to fig. 14 to 16. Hereinafter, the operations of the 1 st right arm 100 and the moving means 272 of the handle unit 6 will be described, and the operations of the 1 st left arm 104 and the moving means 274 will be similar.

First, the user rotates the operation portion 262 in the 1 st circumferential direction V1 (see fig. 15). In this case, the protrusion 288 of the moving means 272 moves from the restricting position to the non-restricting position in conjunction with the operation of the operation portion 262 by the user (see fig. 16). In the present embodiment, the protrusion of the moving unit 274 is also moved from the restricting position to the non-restricting position in conjunction with the operation of the operating portion 262 by the user. Thereby, the user can grip the grip housing 120 of the handle unit 6 to pull up the handle unit 6 from the main body housing 220. That is, the handle unit 6 can be moved from the storage position to the working position. After the handle unit 6 passes the protruding portion 288, the user disengages the hand from the operating portion 262. In this case, the operation portion 262 is rotated in the 2 nd circumferential direction V2 (see fig. 15) by the spring 290. Then, the protrusion 288 moves from the non-restricting position to the restricting position. In this way, the handle unit 6 is moved from the storage position to the working position. The lawnmower according to embodiment 2 can also provide the same effects as those of the lawnmower 2 according to embodiment 1.

In the lawnmower according to the embodiment, the operation portion 262 may be an operation portion that rotates about the rotation axis A2, and the protrusion 288 may be movable between the restricting position and the non-restricting position in association with the user rotating the operation portion 262. According to the above configuration, the user can move the protrusion 288 by rotating the operation portion 262. Therefore, the operability of the mower 2 can be improved.

Specific examples of the present invention have been described in detail, but these are merely examples and do not limit the claims. The techniques described in the claims include those obtained by variously changing or modifying the specific examples illustrated above.

(modification 1)

The "working machine" is not limited to the mower 2, and may be a cultivator, a ripper, a cleaner, or the like.

(modification 2)

The mower 2 may not have the spring 66. In the present modification, the lawnmower 2 may include a lock mechanism for restricting the movement of the right operation unit 62 and the left operation unit 64.

(modification 3)

In the lawnmower 2, the operation portion 70 and the protrusion portion 78 may be independent of each other. In the present modification, the lawnmower 2 may include a coupling mechanism for coupling the operation portion 70 and the protrusion portion 78. For example, the operation portion 70 may be a button-type operation portion. In this case, the protrusion 78 may be moved by an actuator. In the present modification, the user operates the operation unit to drive the actuator, thereby moving the protrusion 78 between the restricting position and the non-restricting position.

(modification 4)

In the restricting position, the protrusion 78 of the mower 2 may be inclined with respect to the axis A1 in the longitudinal direction of the 1 st right arm 100.

(modification 5)

The inclined portion 78c may not be provided on the upper surface of the protruding portion 78 of the mower 2.

(modification 6)

The mower 2 may not have the motor 28. In the present modification, the cutter 26 is driven in conjunction with the movement of the lawnmower 2 by the user, that is, the rotation of the wheels 8 and the rollers 10.

(modification 7)

The "prime mover" may also be an engine.

(modification 8)

The lawn mower 2 may not have the battery pack 50. In the present modification, the lawnmower 2 may include a plug to which a power cord of an AC power supply can be connected.

Technical elements described in the specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations recited in the claims at the time of filing. Further, the technology illustrated in the present specification or the drawings can achieve a plurality of objects at the same time, and achieving one of the objects has its usefulness in the art itself.

Claims (7)

1. A working machine which operates in contact with the ground, wherein,

the work machine includes:

an operation section;

a main body case in which the working unit is provided;

a handle unit having an arm portion rotatably attached to the main body case and a grip portion which can be gripped by a user;

an operation unit provided in the main body case and operable by a user; and

a protrusion portion provided in the main body case,

the handle unit is movable between a storage position where the arm portion is tilted with respect to the main body case and an operating position where the arm portion is not tilted with respect to the main body case,

the protrusion is movable between a restricting position and an unrestricting position in conjunction with an operation of the operating portion by a user, the restricting position being a position at which the protrusion is in contact with the arm of the handle unit when the handle unit is moved from the storage position to a working position, the unrestricting position being a position at which the protrusion is not in contact with the arm of the handle unit when the handle unit is moved from the storage position to the working position,

the working machine is configured such that,

the protrusion portion restricts movement of the handle unit from the storage position to the working position in a state where the handle unit is located at the storage position and the protrusion portion is located at the restriction position,

when the handle unit is located at the storage position and the projection is located at the restricting position, the projection is moved from the restricting position to the non-restricting position in conjunction with the operation of the operation portion by the user, whereby the handle unit can be moved from the storage position to the working position.

2. The work machine of claim 1,

the work machine further includes an urging member that urges the protrusion from the non-restricting position to the restricting position.

3. The work machine according to claim 1 or 2,

the operation portion and the protrusion portion are formed integrally.

4. The work machine according to any one of claims 1 to 3,

in the restricting position, the protrusion protrudes from the main body case in a direction perpendicular to an axis in a longitudinal direction of the arm portion when the handle unit is in the storage position.

5. The work machine according to any one of claims 1 to 4,

an inclined portion that inclines downward from the non-restricting position side toward the restricting position side in a direction in which the protrusion portion moves between the non-restricting position and the restricting position is provided on an upper surface of the protrusion portion.

6. The work machine according to any one of claims 1 to 5,

the operating portion is an operating portion that rotates about a rotational axis,

the protrusion is movable between the restricting position and the non-restricting position in rotational association with the operation portion by a user.

7. The work machine according to any one of claims 1 to 6,

the work machine further includes a prime mover that drives the work section.

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