Walking type work machine

Abstract

To provide a walking type work machine capable of simplifying a structure.SOLUTION: A walking type work machine includes: an attachment part 30 provided in a vehicle body; a swing part 40 provided so as to be swingable with respect to the attachment part 30; an engagement part 70 movable with respect to the swing part 40, engageable with the attachment part 30, and capable of regulating the swing of the swing part 40 by engaging with the attachment part 30; a tail wheel support part 90 provided integrally with the engagement part 70 and supporting a tail wheel 13; and a ridge forming mat 12 supported by the swing part 40.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to the technology of walking work machines.

Background Art

[0002] Conventionally, the technology of walking work machines has been known. For example, it is as described in Patent Document 1.

[0003] The control machine (walking work machine) described in Patent Document 1 includes a rotating pipe, a tail wheel, a fixed shaft, and a spring. The rotating pipe is provided so as to be swingable in the vertical direction with respect to the vehicle body. The tail wheel is supported by the rotating pipe. The spring biases the rotating pipe so that the rotating pipe swings upward. The fixed shaft can hold the rotating pipe (tail wheel) by being inserted through the rotating pipe and the vehicle body in a state where the rotating pipe is swung downward.

[0004] In the control machine described in Patent Document 1, the rotating pipe can be swung upward by pulling out the fixed shaft from the rotating pipe and the vehicle body. Also, the spring can hold the rotating pipe swung upward.

[0005] However, since the control machine described in Patent Document 1 has a configuration in which the rotating pipe that supports the tail wheel is held by a fixed shaft and a spring formed separately from the rotating pipe, there is room for improvement in that the number of parts is large and the structure is complex.

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] One aspect of the present disclosure has been made in view of the above situation, and the problem to be solved is to provide a walking work machine capable of simplifying the structure.

Means for Solving the Problems

[0008] The problem to be solved by one aspect of the present disclosure is as described above, and next, means for solving this problem will be described.

[0009] In one aspect of the present disclosure, it includes a mounting portion provided on a vehicle body, a swing portion provided swingably with respect to the mounting portion, a moving portion movable with respect to the swing portion and engageable with the mounting portion, and an engaging portion capable of restricting the swing of the swing portion by engaging with the mounting portion, and a tail wheel support portion provided integrally with the engaging portion and supporting a tail wheel. According to one aspect of the present disclosure, by integrating the engaging portion and the tail wheel support portion, the structure can be simplified.

[0010] In one aspect of the present disclosure, it further includes a ridging mat supported by the swing portion. According to one aspect of the present disclosure, the tail wheel and the ridging mat can be supported together by the swing portion, and the structure can be simplified.

[0011] In one aspect of the present disclosure, the ridging mat is fixed, and it further includes a mat fixing portion detachable from the swing portion. According to one aspect of the present disclosure, the ridging mat can be detached.

[0012] In one aspect of the present disclosure, the mat fixing portion includes a main body portion to which the ridging mat is fixed, and a shaft portion inserted through the main body portion and the swing portion. The main body portion includes a restricting portion that restricts the swing of the swing portion with respect to the shaft portion by abutting against the swing portion. According to one aspect of the present disclosure, the ridging mat can be easily attached to the swing portion.

[0013] In one aspect of the present disclosure, the shaft portion can restrict the swing of the swing portion by abutting against the mounting portion when the swing portion swings to a predetermined position. According to one aspect of the present disclosure, excessive swing of the swing portion can be restricted.

[0014] In one aspect of the present disclosure, when the swing part swings to a predetermined position, the main body part can contact the attachment part, thereby restricting the swing of the swing part. According to one aspect of the present disclosure, excessive swing of the swing part can be restricted.

[0015] In one aspect of the present disclosure, it further includes a restricting mechanism for restricting the swing of the swing part at a predetermined position, and the engaging part can be engaged with the attachment part in a state where the restricting mechanism restricts the swing of the swing part. According to one aspect of the present disclosure, the swing part can be easily held at a predetermined position.

[0016] In one aspect of the present disclosure, the restricting mechanism restricts the swing part at a first use position where the tail wheel can be used and a first non-use position where the tail wheel cannot be used. According to one aspect of the present disclosure, the swing part can be easily held at the first use position and the first non-use position.

[0017] In one aspect of the present disclosure, it further includes a ridging mat supported by the swing part, and the restricting mechanism restricts the swing part at a second use position where the ridging mat can be used and a second non-use position where the ridging mat cannot be used. According to one aspect of the present disclosure, the swing part can be easily held at the second use position and the second non-use position.

[0018] In one aspect of the present disclosure, it further includes a gripping part provided on the tail wheel support part and arranged so as to extend from the left to the right of the tail wheel in the left-right direction of the vehicle body. According to one aspect of the present disclosure, by gripping the gripping part, the movement of the engaging part and the swing of the swing part can be easily performed.

[0019] In one aspect of the present disclosure, the gripping part is fixed to both the left and right side surfaces of the tail wheel support part respectively. According to one aspect of the present disclosure, when operating the gripping portion, forces are evenly applied to the left and right of the tail ring support portion, so that the engaging portion and the swinging portion can be stably operated.

Effects of the Invention

[0020] According to one aspect of the present disclosure, simplification of the structure can be achieved.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0022] Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the drawings will be defined as the upward direction, downward direction, forward direction, backward direction, left direction, and right direction, respectively, for the description.

[0023] Hereinafter, with reference to FIGS. 1, 2, and 9, a walking type working machine 1 (walking type management machine) according to an embodiment of the present invention will be described.

[0024] The walking type working machine 1 mainly includes a machine body frame 2, a transmission case 3, a motor 4, a motor cover 5, a rotating shaft 6, tilling claws 7, a fender 8, a handle frame 9, a control handle 10, a resistance bar 11, a ridging mat 12, a trailing wheel 13, a posture switching mechanism 20, and the like.

[0025] The machine body frame 2 shown in Fig. 1 is formed by combining a plurality of plate materials. A transmission case 3 is fixed to the front part of the machine body frame 2. A motor 4 is fixed to the upper part of the transmission case 3. The motor 4 is covered by a motor cover 5 from above.

[0026] A transmission mechanism (not shown) for transmitting the power from the motor 4 is accommodated in the transmission case 3. A rotating shaft 6 extending left and right from the transmission case 3 is provided at the lower part of the transmission case 3. The rotating shaft 6 can be rotated by the power of the motor 4 transmitted through the transmission mechanism. The tilling claws 7 are provided so as to be integrally rotatable with the rotating shaft 6. A fender 8 covering the tilling claws 7 from above is provided at the upper part of the transmission case 3.

[0027] The handle frame 9 is a frame for supporting the control handle 10. The handle frame 9 is fixed to the machine body frame 2. The handle frame 9 is formed so as to extend rearward and upward from the machine body frame 2 in a side view. The control handle 10 is arranged so as to extend rearward and upward from the handle frame 9. Various operation tools (levers, switches, etc.) for operating the walking type working machine 1 are provided on the control handle 10.

[0028] The resistance bar 11 is for inserting into the field to generate resistance and adjusting the forward speed of the walking type working machine 1. The resistance bar 11 is formed in a columnar shape. The ridging mat 12 shown in Figs. 1 and 2 is for forming ridges in the field. The ridging mat 12 is composed of a flexible plate-like member. The resistance bar 11 and the ridging mat 12 are arranged behind the tilling claws 7.

[0029] The rear wheel 13 is a wheel for moving the walking type working machine 1. The rear wheel 13 is disposed above the ridging mat 12. The attitude switching mechanism 20 is for switching the attitudes of the resistance bar 11, the ridging mat 12, and the rear wheel 13.

[0030] In the walking type working machine 1 configured as described above, the power from the motor 4 is transmitted to the rotating shaft 6 via a transmission mechanism housed in the transmission case 3. By rotating the rotating shaft 6 by the power from the motor 4, the tilling claws 7 can be rotated to perform tilling work on the field. At this time, by the attitude switching mechanism 20, by setting the attitude of the resistance bar 11 downward as shown in FIG. 1, the resistance bar 11 can be inserted into the field to adjust the forward speed of the walking type working machine 1. Further, by the attitude switching mechanism 20, by setting the attitude of the ridging mat 12 with the plate surface facing forward as shown in FIG. 9, the soil tilled by the tilling claws 7 can be pressed to form ridges.

[0031] Hereinafter, with reference to FIGS. 2 to 6, the attitude switching mechanism 20 will be described. As shown in FIGS. 2 to 4, the attitude switching mechanism 20 includes an attachment portion 30, a swing portion 40, a swing shaft 50, a mat fixing portion 60, an engagement portion 70, a spring 80, a rear wheel support portion 90, a grip portion 100, and a regulating mechanism 110.

[0032] The attachment portion 30 is a portion to which the swing portion 40 and the like are attached. The attachment portion 30 is provided on the vehicle body (the handle frame 9 in the present embodiment). The attachment portion 30 includes side plates 31 and a holding portion 32.

[0033] The side plate 31 is a plate-like portion with the plate surface facing in the left-right direction. A pair of left and right side plates 31 are provided. The front end portion of the side plate 31 is fixed to the front lower portion of the handle frame 9. The side plate 31 includes a first contact portion 31a and a second contact portion 31b.

[0034] The first contact portion 31a shown in FIGS. 3 and 4 is a portion that can contact the shaft portion 62 of the mat fixing portion 60 described later. The first contact portion 31a is formed at the rear end portion of the lower-facing end surface of the side plate 31. Also, the first contact portion 31a is formed in an arc shape in side view. The second contact portion 31b is a portion that can contact the main body portion 61 of the mat fixing portion 60 described later. The second contact portion 31b is formed at the middle portion (in front of the first contact portion 31a) of the lower-facing end surface of the side plate 31. Also, the second contact portion 31b is formed so as to extend upward and rearward.

[0035] The holding portion 32 shown in FIG. 4 is a portion for holding the engaging portion 70 described later. The holding portion 32 is formed in a plate shape. The holding portion 32 is disposed inside the left and right of the pair of left and right side plates 31. The holding portion 32 is formed in a substantially L shape in side view by a first portion 32a that extends downward and rearward and a second portion 32b that extends forward and downward from the lower end portion of the first portion 32a. The holding portion 32 is fixed to the pair of left and right side plates 31. The holding portion 32 includes a first hole portion 32c and a second hole portion 32d.

[0036] The first hole portion 32c is a hole formed in the first portion 32a. The first hole portion 32c is formed in a circular shape. The second hole portion 32d is a hole formed in the second portion 32b. The second hole portion 32d is formed in a circular shape having substantially the same inner diameter as the inner diameter of the first hole portion 32c.

[0037] The swinging portion 40 shown in FIGS. 2, 3, and 6 is a portion that can swing with respect to the vehicle body. The swinging portion 40 is attached to the attachment portion 30 via a swinging shaft 50 described later. The swinging portion 40 includes a connecting portion 41, an extending portion 42, a supporting portion 43, a guiding portion 44, and an insertion portion 45.

[0038] The connecting portion 41 shown in FIGS. 3 and 6 is a portion connected to the side plate 31 of the attachment portion 30. The connecting portion 41 is formed in a substantially U shape in front view with the opening facing upward (see FIG. 5). The front end portions of the left and right side surfaces of the connecting portion 41 are disposed outside the left and right of the side plate 31 of the attachment portion 30.

[0039] The extension part 42 shown in FIGS. 4 and 6 is a part formed to extend upward from the connecting part 41. The extension part 42 is formed in a plate shape with the plate surface facing in the left - right direction.

[0040] The support part 43 is a part for supporting members (resistance rod 11, attachments, etc.) necessary for the work by the walking - type working machine 1. The support part 43 is formed in a cylindrical shape with the axial direction facing up and down. The inner diameter of the support part 43 is substantially the same as the outer diameter of the resistance rod 11. The support part 43 is fixed to the connecting part 41 at the rear side of the extension part 42. Also, the extension part 42 is fixed to the support part 43 and the connecting part 41. Thereby, the extension part 42 can function as a rib to reinforce the swing part 40.

[0041] As shown in FIG. 4, the resistance rod 11 is fixed to the support part 43 via the pin P1 and is arranged to protrude downward from the support part 43. By pulling out the pin P1, the resistance rod 11 can be removed from the support part 43. Also, other members (attachments, etc.) can be attached to the support part 43 from which the resistance rod 11 has been removed.

[0042] The guide part 44 shown in FIGS. 4 and 6 is a part for guiding the engagement part 70. The guide part 44 is formed in a cylindrical shape. The guide part 44 is fixed to the upper end part of the extension part 42 and is arranged to incline upward to the rear. Also, the guide part 44 is arranged rear - upper of the first hole part 32c.

[0043] The insertion part 45 is a part to be inserted into a tail - ring support part 90 described later. The insertion part 45 is formed in a columnar shape and is fixed to the outer peripheral surface of the guide part 44. The insertion part 45 protrudes rear - upward from the guide part 44.

[0044] The swing axis 50 shown in FIGS. 3 and 4 is for swingably supporting the swing part 40. The swing axis 50 is formed in a substantially cylindrical shape with its axial direction oriented in the left-right direction. The swing axis 50 is inserted through the left and right side surfaces of the side plate 31 of the mounting part 30 and the connecting part 41. Thereby, the swing part 40 is provided so as to be swingable in the vertical direction with respect to the mounting part 30 around the swing axis 50. The swing axis 50 of the present embodiment is inserted through the middle part in the front-rear direction of the side plate 31. The swing axis 50 is arranged so as to be located on the extension line in the axial direction of the engaging part 70. Note that the arrangement of the swing axis 50 is not limited to the present embodiment and can be arbitrarily changed.

[0045] The mat fixing part 60 shown in FIGS. 3 and 6 is the part where the ridge-forming mat 12 is fixed. The mat fixing part 60 is arranged behind the swing axis 50. The mat fixing part 60 includes a main body part 61 and a shaft part 62. In FIG. 6, for convenience of explanation, the description of the shaft part 62 is omitted.

[0046] The main body part 61 is the part forming the main structure of the mat fixing part 60. As shown in FIG. 6, the main body part 61 includes a first plate part 61a and a second plate part 61b.

[0047] The first plate part 61a is configured by appropriately bending a plate-like member extending in the front-rear direction. The first plate part 61a is formed in a U shape in front view (see FIG. 5) that can accommodate the connecting part 41 of the swing part 40 inside, except for the rear end part. The rear end part of the first plate part 61a is formed in a flat plate shape with the plate surface facing in the vertical direction. The rear end part of the ridge-forming mat 12 is fixed to the rear end part of the first plate part 61a via a bolt B and a nut N (see FIG. 4).

[0048] The second plate part 61b is formed in a flat plate shape with the plate surface facing in the vertical direction and extending in the left-right direction. The second plate part 61b is fixed to the first plate part 61a with the front end part of the first plate part 61a placed on the left-right central part. The front end part of the ridge-forming mat 12 is fixed to the second plate part 61b via a bolt B and a nut N (see FIG. 4).

[0049] The shaft portion 62 shown in FIGS. 3 to 5 is for attaching the main body portion 61 to the swing portion 40. The shaft portion 62 is formed in a substantially cylindrical shape with its axial direction oriented left and right. The shaft portion 62 is inserted through the connecting portion 41 and the first plate portion 61a of the main body portion 61 in a state where the first plate portion 61a of the main body portion 61 is fitted into the connecting portion 41 of the swing portion 40. As a result, the ridge mat 12 is supported by the swing portion 40 via the mat fixing portion 60. In this state, the main body portion 61 and the ridge mat 12 tend to swing downward about the shaft portion 62 due to their own weights, but the first plate portion 61a abuts against the connecting portion 41, and the swinging of the main body portion 61 and the like is restricted. By restricting the swinging of the main body portion 61 and the like in this way by the connecting portion 41 and the first plate portion 61a, it is not necessary to separately provide a mechanism for restricting the swinging, so that the structure can be simplified.

[0050] In addition, in the present embodiment, by pulling out the shaft portion 62 from the connecting portion 41 and the first plate portion 61a, the main body portion 61 and the ridge mat 12 can be removed from the swing portion 40. Therefore, when attaching an attachment to the support portion 43, by removing the ridge mat 12 and the like, interference between the attachment and the ridge mat 12 can be prevented.

[0051] The engaging portion 70 shown in FIGS. 4 and 6 is a portion that can be engaged with the mounting portion 30 (the first hole portion 32c and the second hole portion 32d in the present embodiment). The engaging portion 70 is formed in a cylindrical shape. The engaging portion 70 is inserted through the guide portion 44. As a result, the engaging portion 70 is arranged so as to be inclined upward (along the handle frame 9 in a side view). Further, the engaging portion 70 is provided so as to swing integrally with the swing portion 40. The upper rear portion of the engaging portion 70 projects rearward and upward from the guide portion 44 and is fixed to the tail ring support portion 90. Also, the lower front portion of the engaging portion 70 projects forward and downward from the guide portion 44 and is inserted through the first hole portion 32c. By being engaged with the mounting portion 30 in this way, the engaging portion 70 can restrict the vertical swinging of the swing portion 40 about the swing axis 50.

[0052] The spring 80 is for biasing the engaging portion 70 toward the mounting portion 30. The spring 80 is externally fitted to the engaging portion 70 and is disposed between a spring receiving portion 71 fixed to the front lower portion of the engaging portion 70 and the guide portion 44.

[0053] The tail ring support portion 90 shown in FIGS. 3, 4, and 6 is for supporting the tail ring 13. The tail ring support portion 90 is configured by appropriately bending a plate-like member. The tail ring support portion 90 includes a first plate portion 91 and a second plate portion 92.

[0054] The first plate portion 91 is disposed to face the guide portion 44 of the swing portion 40. The rear upper end portion of the engaging portion 70 is inserted into the first plate portion 91. By fixing the engaging portion 70 to the first plate portion 91, the first plate portion 91 is integrally formed with the engaging portion 70. Further, when the engaging portion 70 is inserted into the guide portion 44, the insertion portion 45 of the swing portion 40 is inserted into the first plate portion 91. Thereby, the rotation of the tail ring support portion 90 about the axis of the engaging portion 70 can be restricted.

[0055] The second plate portion 92 is disposed with its plate surface facing in the left-right direction. The second plate portion 92 is formed to extend rearward from the first plate portion 91. A pair of left and right second plate portions 92 are provided. The axle P2 is inserted through the rear end portions of the pair of left and right second plate portions 92. The tail ring 13 is supported by the tail ring support portion 90 via the axle P2.

[0056] The gripping portion 100 is a portion for an operator to grip and operate. The gripping portion 100 is formed in a substantially U-shape in a rear view with an opening facing downward by a pair of left and right first portions 101 extending vertically and a second portion 102 extending horizontally. The lower end portions of the first portions 101 are disposed on the left and right outer sides of the tail ring support portion 90 (the pair of left and right first plate portions 91) and are fixed to the tail ring support portion 90. Thus, the gripping portion 100 is disposed so as to extend from the left to the right of the tail ring 13 in the left-right direction. Thereby, the second portion 102 can be made relatively long, making it easier for the operator to grip the gripping portion 100.

[0057] The regulating mechanism 110 shown in Fig. 4 is for regulating the swing of the swing part 40 at a predetermined position. The regulating mechanism 110 is composed of the side plate 31 of the mounting part 30, the main body part 61 of the mat fixing part 60, and the shaft part 62 of the mat fixing part 60. The regulating mechanism 110 can regulate the swing of the swing part 40 at the non-use position and the use position.

[0058] The non-use position shown in Figs. 1 to 4 is a position where the tail wheel 13 cannot be used. More specifically, the non-use position is a position where the tail wheel 13 is separated from the ground (the swing position of the swing part 40). In the present embodiment, it is a position where the guide part 44 (engagement part 70) is inclined upward to the rear. In the non-use position, the ridging mat 12 is separated from the ground and cannot level the plowed soil. Thus, the non-use position of the present embodiment is also a position where the ridging mat 12 cannot be used. In the non-use position, the shaft part 62 of the mat fixing part 60 abuts against the first abutting part 31a of the mounting part 30 (see Fig. 4). In this way, the regulating mechanism 110 regulates the upward swing of the swing part 40 beyond the non-use position.

[0059] The use position shown in Fig. 9 is a position where the tail wheel 13 can be used. More specifically, the use position is a position where the tail wheel 13 contacts the ground. The swing part 40 can be moved to the use position by swinging downward from the non-use position. In the use position, since the ridging mat 12 assumes a posture with the plate surface facing forward, the plowed soil can be leveled when the walking type working machine 1 moves forward. Thus, the use position of the present embodiment is also a position where the ridging mat 12 can be used. In the use position, the main body part 61 of the mat fixing part 60 abuts against the second abutting part 31b of the mounting part 30. In this way, the regulating mechanism 110 regulates the downward swing of the swing part 40 beyond the use position.

[0060] Hereinafter, with reference to Figs. 1, 3, 7 to 9, the procedure for switching the position of the swing part 40 will be described. Also hereinafter, taking the case of switching from the non-use position shown in Fig. 3 to the use position shown in Fig. 9 as an example, the procedure for switching the position of the swing part 40 will be described.

[0061] Note that the position of the swing part 40 can be switched from the state shown in FIG. 1 when the walking type working machine 1 is tilted forward (the walking type working machine 1 is rotated counterclockwise in a left side view around the rotation axis 6). However, for the convenience of explanation below, it is assumed that the position of the swing part 40 is switched in the posture shown in FIG. 1, and the position switching procedure will be described.

[0062] When switching from the non-use position to the use position, first, the operator grips the grip part 100 shown in FIG. 7 and pulls the grip part 100 rearward and upward (in the direction in which the engaging part 70 is separated from the first hole part 32c). As a result, the engaging part 70 slides the guide part 44 rearward and upward against the biasing force of the spring 80. Further, the tail ring support part 90, the grip part 100, and the tail ring 13 move rearward and upward integrally with the engaging part 70. Thus, the engaging part 70 is pulled out from the first hole part 32c, and the engagement between the engaging part 70 and the first hole part 32c is released. For this reason, the swing part 40 can swing downward with respect to the mounting part 30 around the swing shaft 50.

[0063] Next, while keeping the grip part 100 pulled, the operator swings the swing part 40 downward while supporting it via the grip part 100. Along with this swing, members (such as the mat fixing part 60 and the ridge forming mat 12) supported by the swing part 40 also swing downward.

[0064] As shown in FIG. 8, the operator swings the swing part 40 until the main body part 61 of the mat fixing part 60 abuts against the second abutting part 31b of the mounting part 30. The engaging part 70 is located rearward and downward of the second hole part 32d in this state.

[0065] The operator releases the pulling of the engaging part 70 from the state shown in FIG. 8, and moves the engaging part 70 toward the mounting part 30 by the biasing force of the spring 80 and inserts it into the second hole part 32d. As a result, the engaging part 70 is engaged with the second hole part 32d, and the swing part 40 is held at the use position shown in FIG. 9. In this way, in the present embodiment, since the downward swing of the swing part 40 is restricted by the restricting mechanism 110 at the use position (the position where the engaging part 70 can be engaged with the second hole part 32d), the operator can easily switch the swing part 40 to the use position.

[0066] In addition, the operator can switch the position of the swing part 40 from the use position to the non-use position by a procedure opposite to that for switching from the non-use position to the use position. More specifically, the operator operates the grip part 100 to pull out the engaging part 70 from the second hole part 32d and swing the swing part 40 upward. Then, the operator releases the pulling of the engaging part 70 to engage the engaging part 70 with the first hole part 32c by the biasing force of the spring 80.

[0067] In the present embodiment, since the regulation mechanism 110 regulates the swinging of the swing part 40 at the non-use position (the position where the engaging part 70 can be engaged with the first hole part 32c) (see FIG. 7), the operator can easily switch the swing part 40 to the non-use position.

[0068] Also, in the present embodiment, since the tail ring support part 90 that supports the tail ring 13 is provided integrally with the engaging part 70 that holds the posture of the swing part 40, the number of parts can be reduced and the structure can be simplified. Further, by operating the grip part 100 fixed to the tail ring support part 90, the movement of the engaging part 70 and the swinging of the swing part 40 can be respectively performed, so that the operator can easily perform the operation of switching the position of the swing part 40.

[0069] Also, in the present embodiment, the engaging part 70 is arranged obliquely with respect to the horizontal direction. For example, the engaging part 70 is arranged to incline backward downward when the swing part 40 is arranged at the use position shown in FIG. 9 and the tilling claws 7 and the tail ring 13 are in contact with the horizontal plane. Hereinafter, the posture (the posture of the vehicle body) in which the tilling claws 7 and the tail ring 13 are in contact with the horizontal plane is referred to as the "reference posture".

[0070] The engaging portion 70 is arranged to incline upward to the rear when the swing portion 40 is arranged at the non-use position shown in FIG. 3 in the reference posture. The engaging portion 70 is arranged along the handle frame 9. More specifically, the engaging portion 70 is arranged substantially parallel to the handle frame 9 in a side view. For example, the engaging portion 70 is arranged such that the angle formed by a straight line along the axial direction of the engaging portion 70 and a straight line along the longitudinal direction of the handle frame 9 is equal to or less than a predetermined angle (for example, 10°) in a side view.

[0071] In this way, by arranging the engaging portion 70 substantially parallel to the handle frame 9, when the swing portion 40 is arranged at the non-use position, the gripping portion 100 can be pulled along the handle frame 9. As a result, when pulling the gripping portion 100, it is possible to make it difficult for the gripping portion 100 to approach the handle frame 9, so that it is possible to suppress the interference of the gripping portion 100 with the handle frame 9 and other members (such as stays) attached to the handle frame 9. Thereby, it becomes possible to arrange the tail wheel support portion 90, the gripping portion 100, etc. at positions relatively close to each other in a side view with respect to the handle frame 9, and space saving can be achieved.

[0072] As described above, the walking working machine 1 according to the present embodiment includes a mounting portion 30 provided on the vehicle body, a swing portion 40 swingably provided with respect to the mounting portion 30, a moving portion with respect to the swing portion 40 and an engaging portion 70 that can be engaged with the mounting portion 30 and can regulate the swing of the swing portion 40 by engaging with the mounting portion 30, and a tail wheel support portion 90 that is provided integrally with the engaging portion 70 and supports the tail wheel 13.

[0073] By configuring in this way, simplification of the structure can be achieved.

[0074] Further, the walking working machine 1 further includes a ridge forming mat 12 supported by the swing portion 40.

[0075] By configuring in this way, the tail ring 13 and the ridging mat 12 can be supported together by the swing part 40, and the structure can be simplified.

[0076] Further, the walking work machine 1 further includes a mat fixing part 60 to which the ridging mat 12 is fixed and which is detachable from the swing part 40.

[0077] By configuring in this way, the ridging mat 12 can be detached.

[0078] Further, the mat fixing part 60 includes a main body part 61 to which the ridging mat 12 is fixed, and a shaft part 62 inserted through the main body part 61 and the swing part 40. The main body part 61 includes a first plate part 61a (restricting part) that restricts the swing of the swing part 40 around the shaft part 62 by coming into contact with the swing part 40.

[0079] By configuring in this way, the ridging mat 12 can be easily detached by inserting and removing the shaft part 62.

[0080] Further, the shaft part 62 can restrict the swing of the swing part 40 by coming into contact with the mounting part 30 when the swing part 40 swings to a predetermined position (the non-use position shown in FIG. 4). Note that the position where the shaft part 62 restricts the swing part 40 is not particularly limited. For example, the shaft part 62 can also be provided so as to be able to come into contact with the mounting part 30 at the use position, thereby restricting the swing part 40 at the use position. Further, the shaft part 62 can be provided so as to be able to come into contact with the mounting part 30 at each of the non-use position and the use position, thereby restricting the swing part 40 at each of the non-use position and the use position.

[0081] By configuring in this way, excessive swing of the swing part 40 can be restricted. Further, since the swing of the swing part 40 can be restricted by using the shaft part 62, the structure can be simplified.

[0082] Further, when the swing part 40 swings to a predetermined position (the use position shown in FIG. 8), the main body part 61 abuts against the attachment part 30, so that the swing of the swing part 40 can be restricted. The position where the main body part 61 restricts the swing part 40 is not particularly limited. For example, the main body part 61 can be provided so as to be able to abut against the attachment part 30 in the non-use position, so that the swing part 40 can be restricted in the non-use position. Further, the main body part 61 can be provided so as to be able to abut against the attachment part 30 in each of the non-use position and the use position, so that the swing part 40 can be restricted in each of the non-use position and the use position.

[0083] By configuring in this way, excessive swing of the swing part 40 can be restricted. Further, since the swing of the swing part 40 can be restricted by using the main body part 61, the structure can be simplified.

[0084] Further, the walking type working machine 1 further includes a restricting mechanism 110 that restricts the swing of the swing part 40 at predetermined positions (the non-use position shown in FIG. 4 and the use position shown in FIG. 8), and the engaging part 70 can be engaged with the attachment part 30 in a state where the restricting mechanism 110 restricts the swing of the swing part 40 (see FIGS. 7 and 8).

[0085] By configuring in this way, the swing part 40 can be easily held. That is, since the engaging part 70 can be engaged with the attachment part 30 in a state where the swing part 40 is restricted, the alignment of the swing part 40 can be easily performed.

[0086] Further, the restricting mechanism 110 restricts the swing part 40 at a first use position where the tail wheel 13 can be used and a first non-use position where the tail wheel 13 cannot be used (see FIGS. 4 and 8).

[0087] By configuring in this way, the swing part 40 can be easily held at the first use position and the first non-use position.

[0088] Further, the walking work machine 1 further includes a ridge forming mat 12 supported by the swing part 40, and the restricting mechanism 110 restricts the swing part 40 at a second use position where the ridge forming mat 12 can be used and a second non-use position where the ridge forming mat 12 cannot be used (see FIGS. 4 and 8).

[0089] By configuring in this way, the swing part 40 can be easily held at the second use position and the second non-use position.

[0090] Further, the walking work machine 1 further includes a gripping part 100 provided at the tail wheel support part 90 and arranged so as to extend from the left to the right of the tail wheel 13 in the left-right direction of the vehicle body.

[0091] By configuring in this way, by gripping the gripping part 100, the movement of the engaging part 70 and the swing of the swing part 40 can be easily performed.

[0092] Further, the gripping part 100 is fixed to both left and right side surfaces (second plate parts 92) of the tail wheel support part 90, respectively.

[0093] By configuring in this way, when operating the gripping part 100, forces are applied to the left and right of the tail wheel support part 90 in a well-balanced manner, so that the engaging part 70 and the swing part 40 can be stably operated.

[0094] Note that the first plate part 61a according to the present embodiment is one embodiment of the restricting part according to the present invention. Further, the use position according to the present embodiment is one embodiment of the first use position and the second use position according to the present invention. Further, the non-use position according to the present embodiment is one embodiment of the first non-use position and the second non-use position according to the present invention.

[0095] As described above, the embodiments of the present invention have been described, but 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.

[0096] For example, in this embodiment, the motor 4 is exemplified as the drive source, but other drive sources (for example, an engine) can also be used as the drive source.

[0097] Also, although the mat fixing portion 60 is detachable from the swinging portion 40, the mat fixing portion 60 may be provided integrally with the swinging portion 40.

[0098] Also, the regulation mechanism 110 is configured to regulate the swinging of the swinging portion 40 at the non-use position and the non-use position when the mat fixing portion 60 abuts against the mounting portion 30 (see FIGS. 7 and 8). However, the configuration of the regulation mechanism 110 is not limited to this embodiment and can be arbitrarily changed. For example, the regulation mechanism 110 can also regulate the swinging of the swinging portion 40 by bringing a member different from the mat fixing portion 60 into contact with the mounting portion 30. Also, the regulation mechanism 110 can regulate the swinging of the swinging portion 40 only at either the non-use position or the non-use position.

[0099] Also, the mat fixing portion 60 is configured to regulate the swinging with respect to the swinging portion 40 when the main body portion 61 abuts against the connecting portion 41 of the swinging portion 40. However, the configuration for regulating the swinging of the mat fixing portion 60 is not limited to this embodiment and can be arbitrarily changed.

[0100] Also, although the gripping portion 100 is formed in a substantially U shape when viewed from the back, the shape of the gripping portion 100 is not limited to this embodiment and can be arbitrarily changed.

Explanation of Reference Numerals

[0101] 1 Walking type working machine 13 Rear wheel 30 Mounting portion 40 Swinging portion 70 Engaging portion 90 Rear wheel support portion

Claims

1. An attachment portion provided on the vehicle body, A swing portion provided swingably with respect to the attachment portion, An engaging portion that is movable with respect to the swing portion and engageable with respect to the attachment portion, and that can regulate the swing of the swing portion by engaging with the attachment portion, A tail wheel support portion provided integrally with the engaging portion and supporting the tail wheel, A walking type working machine comprising the above.

2. Further comprising a ridging mat supported by the swing portion, The walking type working machine according to Claim 1.

3. The ridging mat is fixed, and further comprising a mat fixing portion that is detachable from the swing portion, The walking type working machine according to Claim 2.

4. The mat fixing portion includes: A main body portion to which the ridging mat is fixed, A shaft portion inserted through the main body portion and the swing portion, And comprises: The main body portion: Comprises a regulating portion that regulates the swing of the swing portion about the shaft portion by contacting the swing portion, The walking type working machine according to Claim 3.

5. The shaft portion: When the swing portion is swung to a predetermined position, it can contact the attachment portion to regulate the swing of the swing portion, The walking type working machine according to Claim 4.

6. The main body portion: When the swing portion is swung to a predetermined position, it can contact the attachment portion to regulate the swing of the swing portion, The walking type working machine according to Claim 4.

7. Further comprising a regulating mechanism that regulates the swing of the swing portion at a predetermined position, The engaging portion: In a state where the regulating mechanism regulates the swing of the swing portion, it is engageable with respect to the attachment portion, The walking type working machine according to Claim 1.

8. The regulating mechanism: Regulates the swing portion at a first use position where the tail wheel can be used and a first non-use position where the tail wheel cannot be used, The walking type working machine according to Claim 7.

9. Further comprising a ridging mat supported by the swing portion, The regulating mechanism: Regulates the swing portion at a second use position where the ridging mat can be used and a second non-use position where the ridging mat cannot be used, The walking type working machine according to Claim 7.

10. Further comprising a gripping portion provided on the tail wheel support portion and arranged so as to extend from left to right of the tail wheel in the left-right direction of the vehicle body, The walking type working machine according to Claim 1.

11. The gripping portion: Is fixed to both left and right side surfaces of the tail wheel support portion respectively, The walking type working machine according to Claim 10.

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