JP7708706B2 - Tail wheel attachment mechanism and walking type cultivator equipped with same - Google Patents

Description

The present invention relates to a tail wheel attachment mechanism and a walk-behind cultivator equipped with the same.

Conventionally, technology for mounting mechanisms that allow the mounting position of the tail wheel to be changed is publicly known. For example, see Patent Document 1.

Patent Document 1 discloses a technology that allows the attachment position of the tail wheel to be changed by rotatably attaching the rotating frame that supports the tail wheel to the main body (support part) of the walk-behind cultivator. Specifically, the rotating frame is inserted into the support part and rotatably supported by the support part. In addition, by attaching a pin that passes through the support part and the rotating frame, the rotation of the rotating frame is restricted and the attitude of the rotating frame can be maintained in a fixed position.

In this type of walk-behind cultivator, the rotating frame can be rotated relative to the support by removing the pin. In this state, the rotating frame can be rotated to any position and the pin can be reattached to change the position of the rotating frame (and therefore the position of the tail wheel).

However, with the technology described in Patent Document 1, when changing the installation position of the tail wheel, the work of attaching and detaching the pin is cumbersome, and there is a risk of losing the removed pin, so there is room for improvement in operability.

JP 2012-90536 A

One aspect of the present disclosure was made in light of the above situation, and the problem it aims to solve is to provide a tail wheel attachment mechanism that can improve workability, and a walk-behind cultivator equipped with the same.

The problem that one aspect of this disclosure aims to solve is as described above, and the means for solving this problem will be described next.

A tail wheel mounting mechanism according to one embodiment of the present disclosure comprises a support portion that supports the tail wheel and can be attached to a mounting portion provided on a walk-behind cultivation machine, and a holding portion that is swingable relative to the support portion and can be switched between a holding position in which the support portion is held against the mounting portion and a release position in which the holding of the support portion against the mounting portion is released by swinging relative to the support portion, the support portion comprising a base portion and a first insertion portion that protrudes from the base portion in a first direction and can be inserted into the mounting portion, the holding portion holds the first insertion portion inserted into the mounting portion in the holding position, and the holding portion comprises a first regulating portion that is located on the opposite side of the base portion across the mounting portion in the holding position to prevent the first insertion portion from coming out of the mounting portion .
According to one aspect of the present disclosure, it is possible to improve the workability when changing the mounting position of the tail wheel. Also, according to one aspect of the present disclosure, it is possible to prevent the support part from falling off by holding the first insertion part in a state in which it is inserted into the mounting part. Also, according to one aspect of the present disclosure, it is possible to hold the first insertion part in a state in which it is inserted into the mounting part with a simple configuration.

In addition, a tail wheel mounting mechanism according to one embodiment of the present disclosure comprises a support portion that supports the tail wheel and can be attached to a mounting portion provided on a walk-behind cultivation machine, and a holding portion that is swingable relative to the support portion and can be switched between a holding position in which the support portion is held against the mounting portion and a release position in which holding of the support portion against the mounting portion is released by swinging relative to the support portion, the support portion comprising a base portion and a first insertion portion that protrudes from the base portion in a first direction and can be inserted into the mounting portion, the holding portion holds the first insertion portion inserted into the mounting portion in the holding position, and the support portion comprises a second insertion portion that protrudes in a second direction different from the first direction and can be inserted into the mounting portion, and the holding portion holds the second insertion portion inserted into the mounting portion in the holding position .
According to one aspect of the present disclosure, it is possible to improve the workability when changing the mounting position of the tail wheel. Also, according to one aspect of the present disclosure, by holding the first insertion portion in a state in which it is inserted into the mounting portion, it is possible to prevent the support portion from falling off. Also, by holding the second insertion portion in a state in which it is inserted into the mounting portion, it is possible to prevent the support portion from falling off. Also, by using the second insertion portion that protrudes in a different direction from the first insertion portion, it is possible to mount the tail wheel in a different direction from the case in which the first insertion portion is used.

In addition, in the tail wheel mounting mechanism according to one embodiment of the present disclosure , the retaining portion is provided with a second regulating portion that is located on the opposite side of the base portion across the mounting portion in the retaining position, thereby preventing the second insertion portion from coming off the mounting portion.
According to one aspect of the present disclosure, the second insertion portion can be held inserted into the attachment portion with a simple configuration.

In addition, in the tail wheel mounting mechanism according to one aspect of the present disclosure, at least one of the first insertion portion and the second insertion portion abuts against the retaining portion to position the retaining portion.
According to one aspect of the present disclosure, the positioning of the holding portion can be performed by utilizing the first insertion portion or the second insertion portion, which allows a common member to be used, thereby simplifying the structure.

Moreover, the tail wheel attachment mechanism according to one aspect of the present disclosure includes a biasing portion that biases the holding portion toward the holding position.
According to one aspect of the present disclosure, it is possible to prevent the support part from falling off, and to easily switch the holding part to the holding position.

In addition, in a tail wheel mounting mechanism according to one aspect of the present disclosure, the holding portion includes an operable operating portion, and the support portion includes a surrounding portion formed to surround the movable range of the operating portion.
According to one aspect of the present disclosure, it is possible to prevent foreign matter from entering the movable range of the operation unit.

Moreover, a walk-behind cultivator according to one embodiment of the present disclosure includes an attachment mechanism for the tail wheel.
According to one aspect of the present disclosure, it is possible to improve the workability when changing the mounting position of the tail wheel.

In addition, in a walk-behind cultivator according to one aspect of the present disclosure, the attachment portions are formed at multiple locations on a resistance rod provided on the walk-behind cultivator.
According to one aspect of the present disclosure, a tail wheel can be attached to multiple locations on the resistance bar.

According to one aspect of the present disclosure, it is possible to improve the workability when changing the mounting position of the tail wheel.

FIG. 2 is a left side view showing a walk-behind cultivator according to one embodiment of the present disclosure. Right side view showing the tail wheel attached to the resistance bar. FIG. 13 is an upper right perspective view showing the attachment mechanism attached to the first attachment portion. FIG. FIG. Also, plan view. 7 is a partial cross-sectional view taken along the line XX in FIG. 6. FIG. 11 is a cross-sectional view showing a state in which the holding portion is switched to a release position. FIG. 11 is a cross-sectional view showing the attachment mechanism attached to the second attachment portion.

In the following explanation, the directions indicated by arrows U, D, F, B, L, and R in the figure are defined as upward, downward, forward, backward, leftward, and rightward, respectively.

Below, one embodiment of the present invention will be described with reference to Figure 1.

The walk-behind cultivator 1 comprises a body frame 2, wheels 3, an engine 4, a fuel tank 5, a bonnet 6, a transmission case 7, a rotary tilling device 8, a clutch mechanism 9, a handle frame 10, a handle connector 11, a steering handle 12, a resistance rod 13, a support 14, and a tail wheel 15.

The aircraft frame 2 is a member formed by appropriately bending a plate material. The aircraft frame 2 is supported by a pair of left and right wheels 3. The engine 4 is mounted on the aircraft frame 2. The fuel tank 5 is disposed behind the engine 4. The engine 4 and fuel tank 5 are covered by a bonnet 6.

The transmission case 7 is a case that houses a power transmission mechanism (not shown) that transmits power from the engine 4 to the wheels 3 and the rotary tilling device 8. The rotary tilling device 8 is provided at the rear of the transmission case 7. The rotary tilling device 8 has tilling tines 8a fixed to a rotating shaft. The upper part of the tilling tines 8a is covered by a tilling cover 8b. The clutch mechanism 9 is used to switch between rotating and stopping the wheels 3 and the tilling tines 8a.

A handle frame 10 is disposed above the tilling cover 8b. The handle frame 10 is a frame for supporting a control handle 12. The handle frame 10 is formed to extend rearward and upward. The control handle 12 is attached to the rear upper end of the handle frame 10 via a handle connector 11. The control handle 12 is provided with switches, levers, etc. that allow the operator to control the walk-behind cultivator 1.

In addition, a resistance rod 13 that applies resistance to the movement of the walk-behind cultivator 1 is arranged behind the transmission case 7 and the tilling claws 8a. The resistance rod 13 is supported by a cylindrical support part 14 provided on the tilling cover 8b. The support part 14 is fixed to the tilling cover 8b with its longitudinal direction facing up and down. The resistance rod 13 is fixed in a state where it is inserted through the support part 14. The vertical position of the resistance rod 13 relative to the support part 14 can be adjusted as desired.

A tail wheel 15 can be attached to the resistance rod 13 via an attachment mechanism 100. By attaching the tail wheel 15 to the bottom of the resistance rod 13, the tail wheel 15 can be used when running the walking cultivator 1. In addition, when the tail wheel 15 is not used, the tail wheel 15 can be attached to the top of the resistance rod 13 (see Figure 2).

The specific configuration of the attachment mechanism 100 is described below.

The mounting mechanism 100 shown in Figures 3 to 5 mainly comprises a support portion 110, a holding portion 120, a connecting shaft 130, and a biasing portion 140.

The support part 110 shown in Figures 4 to 6 is a member that supports the tail wheel 15 and can be attached to the resistance rod 13. The support part 110 mainly includes a base part 111, a support arm 112, a support plate 113, a first insertion part 114, a second insertion part 115, and a stopper 116.

The base portion 111 is a portion to which the support arm 112, the support plate 113, etc., described below, are attached. The base portion 111 is formed in a substantially rectangular flat plate shape.

The support arm 112 is a part that supports the tail wheel 15. The support arm 112 is formed from a longitudinal plate material. The front end of the support arm 112 is bent into an L-shape when viewed from above. Specifically, the front end of the support arm 112, whose thickness direction faces left and right, is bent to the right. Hereinafter, the bent portion of the front end of the support arm 112 is referred to as the bent portion 112a. The front end of the support arm 112 is fixed to the upper surface of the base portion 111. The support arm 112 is formed to extend rearward and upward from the base portion 111. The rear end of the support arm 112 is provided with a support shaft 112b that rotatably supports the tail wheel 15.

The support plate 113, together with the support arm 112, is a part that supports the holding part 120 described below. The support plate 113 is formed in a substantially rectangular flat plate shape. The support plate 113 is disposed behind the bent part 112a of the support arm 112 with its thickness direction facing forward and backward. The left end of the support plate 113 is disposed so as to contact the support arm 112. The support plate 113 is fixed to the rear end of the base part 111.

By arranging the support arm 112 and the support plate 113 in this manner, a U-shaped frame (shown by a dashed line in FIG. 6) is formed on the upper part of the base part 111, surrounding the movable range of the operation part 123 (described later) from the front, rear, and left. Hereinafter, this frame part is referred to as the surrounding part 117.

The first insertion portion 114 is a portion that can be inserted into the resistance rod 13. The first insertion portion 114 is formed in a generally cylindrical shape. The first insertion portion 114 is provided so as to protrude downward from the base portion 111. In this embodiment, an example is shown in which a headed pin is used as the first insertion portion 114. The first insertion portion 114 is fixed to the base portion 111 in a state in which it is inserted into the base portion 111 from above.

The second insertion portion 115 is a portion that can be inserted into the resistance rod 13. The second insertion portion 115 is formed in a generally cylindrical shape. The second insertion portion 115 is provided so as to protrude laterally (to the right in this embodiment) from the base portion 111. Specifically, the second insertion portion 115 is fixed to the upper surface of the base portion 111 with its axial direction facing left and right. The right end portion of the second insertion portion 115 is arranged so as to protrude to the right from the base portion 111. In this way, the second insertion portion 115 is arranged so as to protrude in a direction different from that of the first insertion portion 114 (more specifically, in a direction perpendicular to the first insertion portion 114).

The stopper 116 shown in Figures 5 and 6 limits the swing range of the holding part 120, which will be described later. The stopper 116 is formed in a flat plate shape and is fixed to the rear side surface of the support plate 113. The shape of the stopper 116 can be determined appropriately depending on the shape and swing range of the holding part 120. In this embodiment, an example in which the stopper 116 is formed in a substantially rectangular plate shape is shown.

The holding part 120 shown in Figures 4 to 6 is a member capable of holding the support part 110 in a state in which it is attached to the resistance rod 13. The holding part 120 mainly comprises a main body part 121, a restricting arm 122, and an operating part 123.

The main body 121 is a part that forms the main structure of the holding part 120. The main body 121 is formed in a roughly U-shape when viewed from above. The main body 121 is formed by bending both front and rear ends of a flat plate with its thickness direction facing left and right to the left. Hereinafter, the front-to-rear central part of the main body 121 is referred to as the central part 121a, and the bent parts at both front and rear ends are referred to as the front bent part 121b and the rear bent part 121c, respectively. The front-to-rear distance between the front bent part 121b and the rear bent part 121c is formed to be slightly larger than the front-to-rear width of the surrounding part 117 of the support part 110 (see FIG. 6).

As shown in Figures 4, 5 and 7, an engagement recess 121d is formed in the central portion 121a of the main body portion 121. The engagement recess 121d is a portion that can engage with the second insertion portion 115 of the support portion 110. The engagement recess 121d is formed by cutting out the lower end portion of the central portion 121a toward the upper side.

The restricting arm 122 is a part that restricts the support part 110 attached to the resistance rod 13 from falling off. The restricting arm 122 is formed into a roughly L-shape in front view by bending the lower end of a roughly cylindrical member that extends vertically to the left. The restricting arm 122 is fixed to the front bent part 121b so as to protrude downward from the main body part 121.

The operating unit 123 shown in Figures 4 to 7 is a part that is operated by an operator when swinging the holding unit 120. The operating unit 123 is formed so as to protrude to the left from the upper end of the main body unit 121 (central unit 121a). Specifically, the operating unit 123 is formed by bending a plate-shaped portion that is integrally formed with the central unit 121a to the left and attaching a cover made of resin or the like to that portion.

The connecting shaft 130 is a member that connects the holding part 120 to the support part 110 so that the holding part 120 can swing. The connecting shaft 130 is formed in a generally cylindrical shape. In this embodiment, an example is shown in which a headed pin is used as the connecting shaft 130.

As shown in FIG. 6 etc., the holding part 120 is arranged so that the surrounding part 117 of the support part 110 is sandwiched from the front and rear between the front bent part 121b and the rear bent part 121c, and the connecting shaft 130 is arranged so as to penetrate the support part 110 and the holding part 120 from the front to the rear. The connecting shaft 130 is provided with a stopper (pin, etc.) to prevent the holding part 120 from falling off the support part 110 and the holding part 120. This allows the holding part 120 to be pivoted relative to the support part 110 around the connecting shaft 130.

The biasing portion 140 shown in Figures 4 to 6 biases the holding portion 120 in one direction. The biasing portion 140 is formed of a torsion coil spring. The biasing portion 140 is arranged in a state where it is inserted into the connecting shaft 130. One end of the biasing portion 140 is engaged with the upper end of the rear bent portion 121c of the holding portion 120. The biasing portion 140 biases the holding portion 120 in a clockwise direction as viewed from the front by biasing the rear bent portion 121c so as to press down.

When the holding part 120 swings to a predetermined position in a clockwise direction as viewed from the front, as shown in FIG. 7, the second insertion part 115 abuts (engages) with the engagement recess 121d, thereby restricting the swinging of the holding part 120. In other words, the position of the holding part 120 can be determined by the second insertion part 115. Hereinafter, the swing position of the holding part 120 where the second insertion part 115 engages with the engagement recess 121d is referred to as the "holding position."

By using the mounting mechanism 100 configured as described above, the tail wheel 15 can be attached to the lower or upper part of the resistance rod 13. The configuration of the resistance rod 13 to which the tail wheel 15 is attached is described below.

The resistance rod 13 shown in Figures 2 to 4 mainly comprises a main body portion 13a, a first mounting portion 13b, and a second mounting portion 13c.

The main body 13a is the part that forms the main structure of the resistance rod 13. The main body 13a is formed in a generally rectangular plate shape that is long vertically. The main body 13a can be inserted into the support part 14 with its thickness direction facing left and right.

The first mounting portion 13b is a portion for mounting the tail wheel 15 (mounting mechanism 100) to the lower portion of the resistance rod 13. The first mounting portion 13b is formed in a plate shape with its thickness direction facing up and down. The first mounting portion 13b is provided so as to protrude rearward from near the lower end of the resistance rod 13. The first mounting portion 13b is formed with a first through hole 13d that is used when mounting the mounting mechanism 100.

The second mounting portion 13c shown in FIG. 2 is a portion for mounting the tail wheel 15 (mounting mechanism 100) to the upper portion of the resistance rod 13. In this embodiment, the second mounting portion 13c is formed by the upper end portion of the main body portion 13a. The second mounting portion 13c is formed with a second through hole 13e that is used when mounting the mounting mechanism 100.

The following describes how to attach and detach the tail wheel 15 to the resistance rod 13 using the attachment mechanism 100.

Figures 3, 6, and 7 show the state in which the mounting mechanism 100 is attached to the first mounting portion 13b. In this state, the base portion 111 of the support portion 110 is placed on the first mounting portion 13b, and the first insertion portion 114 is inserted into the first through hole 13d.

In this state, the holding portion 120 is in the holding position, and the lower end of the restricting arm 122 is located below the first mounting portion 13b. In this way, the restricting arm 122 is located on the opposite side of the base portion 111 across the first mounting portion 13b, thereby preventing the first insertion portion 114 from slipping out of the first through hole 13d.

When the mounting mechanism 100 is attached to the first mounting portion 13b, the tail wheel 15 is positioned near the lower end of the resistance rod 13 (i.e., near the ground) as shown in Figure 2. The tail wheel 15 positioned in this way can be used to move the walking tiller 1.

When the tail wheel 15 is not in use, the tail wheel 15 (mounting mechanism 100) can be removed from the first mounting portion 13b. When removing the mounting mechanism 100 from the first mounting portion 13b, the operator operates the operating portion 123 by pushing it downward, as shown in FIG. 8.

At this time, the operating unit 123 moves so as to sink inside the enclosing portion 117 (see FIG. 6). In other words, at least a portion of the movable range of the operating unit 123 is surrounded by the enclosing portion 117. By surrounding the movable range of the operating unit 123 with the enclosing portion 117 in this manner, it is possible to prevent foreign objects (such as stones) from entering the movable range of the operating unit 123.

As shown in FIG. 8, by operating the operating unit 123, the holding unit 120 swings counterclockwise when viewed from the front, and the restricting arm 122 moves to the outside of the first mounting unit 13b (to the right in the illustrated example). In this state, the mounting mechanism 100 can be removed from the first mounting unit 13b by lifting the mounting mechanism 100 upward. Hereinafter, the swing position of the holding unit 120 at which the mounting mechanism 100 can be removed (the position where the holding of the support unit 110 is released) is referred to as the "release position."

When the operating part 123 is operated to a certain extent, the rear bent part 121c comes into contact with the stopper 116 (see FIG. 5), restricting the swinging of the holding part 120. This makes it possible to prevent the operating part 123 from being operated excessively.

The tail wheel 15 removed from the first mounting portion 13b can be attached to the upper portion (second mounting portion 13c) of the resistance rod 13. When attaching the tail wheel 15 (attachment mechanism 100) to the second mounting portion 13c, the operator operates the operating portion 123 by pushing it downward, and switches the holding portion 120 to the release position (see Figure 8).

In this state, as shown in FIG. 9, the second insertion portion 115 is inserted into the second through hole 13e of the second mounting portion 13c. When the operation of the operating portion 123 is further released, the biasing force of the biasing portion 140 causes the holding portion 120 to rotate clockwise when viewed from the front. In this state, the main body portion 121 (center portion 121a) of the holding portion 120 is positioned on the opposite side of the base portion 111 across the second mounting portion 13c, thereby preventing the second insertion portion 115 from coming out of the second through hole 13e. In this way, the mounting mechanism 100 is attached to the second mounting portion 13c.

In this way, when the mounting mechanism 100 is attached to the second mounting portion 13c, the tail wheel 15 is located near the upper end of the resistance rod 13, as shown by the two-dot chain line in Figure 2. In this way, when the tail wheel 15 is not in use, it can be attached in a position that does not interfere with work.

The plate surface of the second mounting portion 13c faces left and right, while the plate surface of the first mounting portion 13b faces up and down. In other words, the plate surfaces of the first mounting portion 13b and the second mounting portion 13c face in different directions. Accordingly, the mounting mechanism 100 is provided with a first insertion portion 114 and a second insertion portion 115 that face in different directions. By appropriately using the first insertion portion 114 and the second insertion portion 115, the tail wheel 15 can be attached in the same position to both the first mounting portion 13b and the second mounting portion 13c.

As described above, the mounting position of the tail wheel 15 can be changed by using the mounting mechanism 100. In this case, the operator can easily attach or detach the tail wheel 15 by operating the operating part 123 to swing the holding part 120. In addition, since the holding part 120 does not separate from the support part 110, there is no risk of losing parts.

As described above, the attachment mechanism 100 of the tail wheel 15 according to this embodiment has the following features:
A support portion 110 that supports the tail wheel 15 and can be attached to the attachment portions (first attachment portion 13b and second attachment portion 13c) provided on the walking type cultivator 1;
a holding portion 120 that is provided to be pivotable relative to the support portion 110 and that is switchable between a holding position in which the support portion 110 is held relative to the attachment portion and a release position in which the support portion 110 is released from the attachment portion by pivoting relative to the support portion 110;
It is equipped with the following.
This configuration improves the ease of operation when changing the mounting position of the tail wheel 15. Specifically, an operator can attach or detach the tail wheel 15 with the simple operation of swinging the holding part 120. In addition, since the holding part 120 does not separate from the support part 110 (it is provided integrally) when attaching or detaching the tail wheel 15, there is no risk of losing a component.

In addition, the attachment mechanism 100 includes:
The holding portion 120 is provided with a biasing portion 140 that biases the holding portion 120 toward the holding position.
With this configuration, it is possible to prevent the support portion 110 from falling off, and it is also possible to easily switch the holding portion 120 to the holding position.

In addition, the support portion 110 is
A base portion 111;
a first insertion portion 114 that protrudes from the base portion 111 in a first direction and can be inserted into the first mounting portion 13 b;
The holding portion 120 is
In the holding position, the first insertion portion 114 is held in a state where it is inserted into the first attachment portion 13b.
With this configuration, the first insertion portion 114 is held inserted into the first attachment portion 13b, thereby preventing the support portion 110 from falling off.

In addition, the holding portion 120 is
In the holding position, a regulating arm 122 (first regulating portion) is provided which is positioned on the opposite side of the base portion 111 across the first mounting portion 13b, thereby preventing the first insertion portion 114 from coming out of the first mounting portion 13b.
With this configuration, the first insertion portion 114 can be held in a state inserted into the first attachment portion 13b with a simple configuration.

In addition, the support portion 110 is
a second insertion portion 115 that protrudes in a second direction different from the first direction and can be inserted into the second mounting portion 13c;
The holding portion 120 is
At the holding position, the second insertion portion 115 is held in a state where it is inserted into the second attachment portion 13c.
With this configuration, the second insertion portion 115 is held in a state inserted into the second mounting portion 13c, thereby preventing the support portion 110 from falling off. Furthermore, by using the second insertion portion 115 that protrudes in a different direction from the first insertion portion 114, the tail wheel 15 can be attached in a different direction than when the first insertion portion 114 is used. As a result, for example, in this embodiment, the tail wheel 15 can be attached in the same position to both the first mounting portion 13b and the second mounting portion 13c.

In addition, the holding portion 120 is
In the holding position, it has a central portion 121a (second regulating portion) that is located on the opposite side of the base portion 111 across the second mounting portion 13c, thereby preventing the second insertion portion 115 from coming out of the second mounting portion 13c.
By configuring in this manner, the second insertion portion 115 can be held in a state where it is inserted into the second attachment portion 13c with a simple configuration.

In addition, at least one of the first insertion portion 114 and the second insertion portion 115 is
The positioning of the holding portion 120 is performed by abutting against the holding portion 120 .
With this configuration, the position of the holding portion 120 can be determined by utilizing the first insertion portion 114 or the second insertion portion 115. This allows the same member to be used for both purposes, and the structure can be simplified.

In addition, the holding portion 120 is
The device is provided with an operable operation unit 123,
The support portion 110 is
The operating portion 123 includes a surrounding portion 117 formed to surround the movable range of the operating portion 123 .
With this configuration, it is possible to prevent foreign matter from entering the movable range of the operation unit 123 .

In addition, the walking type management machine 1 according to this embodiment is
The tail wheel 15 is provided with an attachment mechanism 100.
By configuring in this manner, the workability when changing the mounting position of the tail wheel 15 can be improved.

In addition, the mounting portion (the first mounting portion 13b and the second mounting portion 13c)
The resistance rod 13 is formed at a plurality of locations on the resistance rod 13 provided on the walking type cultivator 1 .
By configuring it in this manner, the tail wheel 15 can be attached to a plurality of points on the resistance rod 13.

The first mounting portion 13b and the second mounting portion 13c according to the present embodiment are one embodiment of the mounting portion.
Moreover, the restricting arm 122 according to the present embodiment is one embodiment of a first restricting portion.
Moreover, the central portion 121a according to the present embodiment is one embodiment of a second restricting portion.

Although an embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

For example, the holding part 120 may be configured to be swingable relative to the support part 110, and the specific configuration is not particularly limited.

In addition, in this embodiment, a torsion coil spring is shown as an example of the biasing portion 140, but the present invention is not limited to this, and various other members (compression coil spring, leaf spring, etc.) can be used.

In addition, in this embodiment, the first insertion portion 114, the second insertion portion 115, and the restricting arm 122 are each formed from a cylindrical member, but the present invention is not limited to this, and members of various other shapes (e.g., rectangular column, plate, etc.) can be used.

In addition, in this embodiment, an example has been shown in which the first insertion portion 114 and the second insertion portion 115 are arranged in directions perpendicular to each other, but the orientation of the first insertion portion 114 and the second insertion portion 115 is not limited to this and can be changed as desired. In addition to the first insertion portion 114 and the second insertion portion 115, it is also possible to provide further insertion portions arranged in other directions.

In addition, in this embodiment, an example is shown in which mounting parts (first mounting part 13b and second mounting part 13c) for attaching the tail wheel 15 are provided above and below the resistance rod 13, respectively, but the present invention is not limited to this, and mounting parts can be formed in any location. For example, mounting parts can be formed in the middle of the top or bottom of the resistance rod 13, or on a member other than the resistance rod 13 (for example, the tiller cover 8b, the handle frame 10, etc.).

In addition, in this embodiment, when attaching the attachment mechanism 100 to the first attachment portion 13b, an example is shown in which the attachment mechanism 100 is attached to the upper side of the first attachment portion 13b (the base portion 111 is placed on the first attachment portion 13b) (see FIG. 7), but the present invention is not limited to this. For example, it is also possible to invert the attachment mechanism 100 upside down and attach the attachment mechanism 100 to the lower side of the first attachment portion 13b. By attaching the attachment mechanism 100 to the first attachment portion 13b from different directions in this way, the position of the tail wheel 15 can be changed (fine-tuned).

REFERENCE SIGNS LIST 1 Walk-behind cultivator 13b First mounting portion 13c Second mounting portion 15 Tail wheel 100 Mounting mechanism 110 Support portion 111 Base portion 114 First insertion portion 115 Second insertion portion 117 Surrounding portion 120 Holding portion 121a Central portion 122 Restricting arm 123 Operation portion 140 Pressing portion

Claims (8)

A support part that supports the tail wheel and can be attached to an attachment part provided on the walk-behind type cultivator;
a holding portion that is provided to be pivotable relative to the support portion and that is switchable between a holding position in which the support portion is held relative to the attachment portion and a release position in which the support portion is released from the attachment portion by pivoting relative to the support portion;
Equipped with
The support portion is
A base portion;
a first insertion portion that protrudes from the base portion in a first direction and is insertable into the mounting portion;
The holding portion is
At the holding position, the first insertion portion is held in a state of being inserted through the mounting portion,
The holding portion is
a first restricting portion that is located on the opposite side of the base portion across the mounting portion at the holding position to prevent the first insertion portion from coming off the mounting portion;
Tail wheel mounting mechanism. A support part that supports the tail wheel and can be attached to an attachment part provided on the walk-behind type cultivator;
a holding portion that is provided to be pivotable relative to the support portion and that is switchable between a holding position in which the support portion is held relative to the attachment portion and a release position in which the support portion is released from the attachment portion by pivoting relative to the support portion;
Equipped with
The support portion is
A base portion;
a first insertion portion that protrudes from the base portion in a first direction and is insertable into the mounting portion;
The holding portion is
At the holding position, the first insertion portion is held in a state of being inserted through the mounting portion,
The support portion is
a second insertion portion that protrudes in a second direction different from the first direction and is insertable into the mounting portion;
The holding portion is
At the holding position, the second insertion portion is held in a state of being inserted through the mounting portion.
Tail wheel mounting mechanism. The holding portion is
a second restriction portion that is located on the opposite side of the base portion across the mounting portion at the holding position to prevent the second insertion portion from coming off the mounting portion;
3. The tail wheel mounting mechanism of claim 2. At least one of the first insertion portion and the second insertion portion is
The holding portion is positioned by contacting the holding portion.
A tail wheel mounting mechanism according to claim 2 or 3. A biasing portion is provided to bias the holding portion toward the holding position.
A tail wheel mounting mechanism according to any one of claims 1 to 4. The holding portion is
The device has an operable operation unit,
The support portion is
A surrounding portion is provided so as to surround the movable range of the operation portion.
A tail wheel mounting mechanism according to any one of claims 1 to 5. The tail wheel mounting mechanism according to any one of claims 1 to 6 is provided.
Walk-behind management machine. The mounting portion is
A resistance rod is formed at a plurality of locations on the resistance rod provided on the walking type management machine.
The walk-behind cultivator according to claim 7.