Traveling vehicle

Abstract

Provided is a traveling vehicle with which it is possible to reduce the number of components of an interlocking mechanism for interlocking a pedal with a first operation body and a second operation body, and to suppress any variation in operation.　A traveling vehicle (1) comprises: a first locking part (61) that locks a steering shaft (26) at a changed tilt angle; a first operation body (43) that releases the locking of the first locking part; a second locking part (20) that locks the steering shaft to an adjusted length; a second operation body (51) that releases the locking of the second locking part; a rotating shaft (44) that is supported so as to be capable of rotating around an axis, and that operates the first operation body so as to release the locking of the first locking part (61) when the first operation body is attached so as to be capable of rotating integrally and the first operation body rotates; a pedal (47) that is attached to the rotating shaft so as to be capable of rotating integrally; a connecting part (90) that is provided so as to be capable of rotating integrally with the pedal or the rotating shaft; and an interlocking link (71) that connects the connecting part and the second operation body.

Description

Vehicles in motion

[0001] The present invention relates to a traveling vehicle.

[0002] BACKGROUND ART A traveling vehicle disclosed in Patent Document 1 is known.

[0003] The vehicle disclosed in Patent Document 1 is equipped with a steering shaft whose tilt angle can be changed and whose length can be adjusted, a first locking unit (first meshing unit, second locking member) that locks the steering shaft at a changed tilting angle, a first operating body (latching member) that releases the lock by the first locking unit, a second locking unit (telescopic locking unit) that locks the steering shaft at an adjusted length, a second operating body (actuating member) that releases the lock by the second locking unit, and a pedal (operating pedal) that is linked to the first operating body and the second operating body when depressed, and releases the lock by the first locking unit and the lock by the second locking unit.

[0004] Japanese Patent Publication No. 2020-32968

[0005] In conventional running vehicles, the interlocking mechanism that links the pedal with the first and second operating bodies has a large number of parts, which creates a problem of variations in operation due to the accumulation of dimensional tolerances of the components that make up the interlocking mechanism.

[0006] In view of the above-mentioned problems, the present invention aims to provide a moving vehicle that can reduce the number of parts in the interlocking mechanism that links the pedal with the first operating body and the second operating body, and can suppress variations in operation.

[0007] A traveling vehicle according to one aspect of the present invention is a traveling vehicle comprising: a steering shaft to which a steering handle is attached, the steering shaft having a variable tilt angle and an adjustable length; a first locking unit that locks the steering shaft at a changed tilting angle; a first operating body that releases the locking by the first locking unit; a second locking unit that locks the steering shaft at an adjusted length; and a second operating body that releases the locking by the second locking unit; a rotating shaft that is supported so as to be rotatable about its axis and to which the first operating body is attached so as to be rotatable integrally, and that operates the first operating body by rotating to release the locking by the first locking unit; a pedal that is attached so as to be rotatable integrally to the rotating shaft and that rotates the rotating shaft by stepping on it; a connecting unit that is rotatable integrally to the pedal or the rotating shaft; and an interlocking link that connects the connecting unit and the second operating body, so as to operate the second operating body by rotating the rotating shaft to release the locking by the second locking unit.

[0008] The connecting portion may be attached to the pivot shaft.

[0009] The traveling vehicle may include a tilt axis that is a center of tilting movement of the steering shaft, and a movable bracket to which the steering shaft is attached, the movable bracket being supported so as to be rotatable about the tilt axis, the first locking portion having a locking member that locks rotation of the movable bracket about the tilt axis by engaging with the movable bracket in a manner that allows it to be engaged or disengaged, and an engagement pin provided on the locking member, the first operating body having an engagement groove through which the engagement pin is inserted, the engagement groove having a first groove portion in which the engagement pin is positioned when the locking member has locked rotation of the movable bracket about the tilt axis, and a second groove portion that pushes the engagement pin when the first operating body rotates together with the rotation axis from a state in which the engagement pin is positioned in the first groove portion, thereby operating the locking member to unlock rotation of the movable bracket about the tilt axis.

[0010] The interlocking link may have one longitudinal end portion connected to the connecting portion, and the second operating body may have a long groove through which the other longitudinal end portion of the interlocking link is inserted, and the long groove may be configured to allow the other end portion of the interlocking link to move relatively within the long groove so that, when the pedal is depressed a predetermined amount from a non-depressed position, the lock on the rotation of the movable bracket about the tilt axis is released before the second operating body releases the lock by the second locking portion.

[0011] The second groove portion may be formed to have a groove length that allows the other end of the interlocking link to push the end of the long groove and operate the second operating body to release the lock by the second lock portion by further depressing the pedal after the movable bracket has been unlocked from rotation around the tilt axis.

[0012] The interlocking link may be disposed between the connecting portion and the second operating body so as to pass near the tilt shaft when viewed from the axial direction of the tilt shaft.

[0013] According to the above-described traveling vehicle, it is possible to reduce the number of parts of the interlocking mechanism that interlocks the pedal with the first and second operating bodies, thereby suppressing variations in operation.

[0014] 1 is a schematic side view of a traveling vehicle. FIG. 1 is a left perspective view showing the support body and the surrounding area of ​​the steering shaft. FIG. 2 is a right perspective view showing the support body and the surrounding area of ​​the steering shaft. FIG. 3 is a side view showing the support body and the surrounding area of ​​the steering shaft. FIG. 4 is a left perspective view of a support frame. FIG. 5 is a right perspective view of the support frame. FIG. 6 is a perspective view showing a state in which a steering post is attached to a movable bracket. FIG. 7 is a cross-sectional view of the steering post and the steering shaft. FIG. 8 is a rear view showing a first locking portion and a first operating body, etc. FIG. 9 is an exploded perspective view showing a pedal, a rotating shaft, a first bracket, a first side wall, a first locking member, a first operating body, etc. FIG. 10 is an enlarged right side view showing the first locking portion and the first operating body. FIG. 11 is a right side view showing a state in which the pedal is depressed to a first depression position. FIG. 12 is a right side view showing a state in which the pedal is depressed to a second depression position. FIG. 13 is a right side view showing a state in which the pedal is depressed to a third depression position. FIG. 14 is a side view showing a mechanism, etc., that interlocks the pedal and the second operating body. FIG. 15 is a side cross-sectional view of the second locking portion. FIG. 16 is a perspective view showing the pedal and the second operating body, etc., as seen from the rear. FIG. 17 is a perspective view showing the pedal and the second operating body, etc., as seen from the front. 10A and 10B are side views showing a second operating body and a second locking member, a side view showing a second operating body and a second locking member, and a side view showing a second operating body and a second locking member.

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.

[0016] 1 is a schematic side view showing a traveling vehicle 1 according to this embodiment. In this embodiment, a tractor is exemplified as the traveling vehicle 1. In the following, the traveling vehicle 1 will be described as a tractor.

[0017] In this embodiment, the direction of arrow A1 in FIG. 1 (the forward direction of the tractor 1) will be described as the front, and the direction of arrow A2 in FIG. 1 (the reverse direction of the tractor 1) will be described as the rear. Therefore, the front side of FIG. 1 is the left, and the back side of FIG. 1 is the right. Furthermore, the horizontal direction perpendicular to the fore-and-aft direction A3 will be described as the vehicle width direction. The direction from the center of the tractor 1 in the vehicle width direction toward the right or left will be described as the vehicle outside (also referred to as the vehicle width outside). In other words, the vehicle outside is the direction away from the center of the tractor 1 in the vehicle width direction. The direction opposite to the vehicle outside is described as the vehicle inside (also referred to as the vehicle width inside). In other words, the vehicle inside is the direction toward the center of the tractor 1 in the vehicle width direction.

[0018] 1, the tractor 1 has a travellable vehicle body 2. The vehicle body 2 has a prime mover E1, a flywheel housing 3, a clutch housing 4, a transmission case 5, and a front axle frame 6.

[0019] The prime mover E1 is a diesel engine. The prime mover E1 is located at the front of the tractor 1 and is covered by a hood 10. The prime mover E1 may be an electric motor, or may be a hybrid type having a diesel engine and an electric motor.

[0020] The flywheel housing 3 is connected to the rear of the prime mover E1. A flywheel is accommodated inside the flywheel housing 3. The clutch housing 4 is connected to the rear of the flywheel housing 3. A clutch that intermittently transmits the power of the prime mover E1 transmitted via the flywheel is accommodated inside the clutch housing 4. The transmission case 5 is connected to the rear of the clutch housing 4. A transmission that changes the speed of the power transmitted via the clutch is accommodated inside the transmission case 5. The transmission has a forward / reverse switching mechanism that rotates the power transmitted by the transmission in the forward or reverse direction to switch the output between forward and reverse.

[0021] The front axle frame 6 is fixed to the engine E1 and protrudes forward from the engine E1. A front axle case 15 is supported on the front axle frame 6.

[0022] As shown in Figure 1, the tractor 1 has a traveling device 8 that supports the body 2 so that it can travel. The traveling device 8 is a wheel-type traveling device that has left and right front wheels 11L, 11R provided at the front of the body 2 and left and right rear wheels 12L, 12R provided at the rear of the body 2. The left front wheel 11L is supported on the left side of a front axle case 15, and the right front wheel 11R is supported on the right side of the front axle case 15. The left rear wheel 12L is supported on the left side of a transmission case 5, and the right rear wheel 12R is supported on the right side of the transmission case 5.

[0023] As shown in FIG. 1 , the left front wheel 11L and the right front wheel 11R are steerable wheels that can be steered by moving the cylinder rod of a steering cylinder 16 disposed in front of a front axle case 15. The direction of the vehicle body 2 can be changed (the vehicle body 2 can be steered) by steering the left front wheel 11L and the right front wheel 11R. The steering cylinder 16 is configured with a hydraulic cylinder. Note that the steering device that steers the vehicle body 2 may be a hydraulic power steering device that includes the steering cylinder 16, an electric power steering device that uses the power of an electric motor to steer the front wheels 11L, 11R, or a steering device that transmits the operating force of the steering handle 19 to the front wheels 11L, 11R via a mechanical transmission mechanism.

[0024] As shown in Figure 1, a driver's seat 13 where a driver (operator) sits is mounted at the rear of the vehicle body 2. A floor 32 is provided on the upper surface of the transmission case 5 in front of the driver's seat 13. The floor 32 forms a tread surface for the operator riding in the tractor 1, a rest surface on which the operator seated in the driver's seat 13 places their feet, and the like.

[0025] A steering device 14 for steering the vehicle body 2 is provided in front of the driver's seat 13. The steering device 14 is mounted on a support body 30 that is erected on the vehicle body 2. The support body 30 is disposed behind the bonnet 10. The support body 30 has a base portion 30a and a frame portion 30b. The base portion 30a is disposed in front of the floor portion 32 and covers the upper part of the transmission case 5. The frame portion 30b is made up of multiple members and is erected behind the base portion 30a.

[0026] As shown in Figure 1, the steering device 14 has a steering handle 19 for steering the vehicle body 2 (front wheels 11L, 11R), a steering shaft 26 to which the steering handle 19 is attached, a support frame 17 (see Figures 2 and 3) that supports the steering shaft 26, and a front cover 18 that covers the lower side of the steering handle 19, the support body 30, etc.

[0027] As shown in Figures 2, 3, and 4, the support frame 17 has a fixed bracket 21 and a movable bracket 22. The fixed bracket 21 is fixed to the support body 30. In this embodiment, the fixed bracket 21 is configured to have a first bracket 21L and a second bracket 21R. Note that the fixed bracket 21 may be configured with one or three or more members. The first bracket 21L and the second bracket 21R are formed from plate material and are arranged side by side with a gap in the vehicle width direction.

[0028] The first bracket 21L is elongated in the vertical direction. The upper portion of the first bracket 21L is fixed to the upper portion of the frame portion 30b, and the lower portion is fixed to the base portion 30a. The second bracket 21R is disposed to the right of the upper portion of the first bracket 21L. The second bracket 21R is fixed to the upper portion of the frame portion 30b.

[0029] As shown in FIGS. 5 and 6 , the movable bracket 22 is supported by the fixed bracket 21 so as to be rotatable (tiltable) around an axis (tilt axis) X1 extending in the vehicle width direction. The movable bracket 22 is formed of a plate material and includes an upper wall portion 22A, a first side wall portion 22B, and a second side wall portion 22C. The upper portion of the first side wall portion 22B is fixed to the left end of the upper wall portion 22A and is provided so as to protrude downward from the upper wall portion 22A. The first side wall portion 22B is disposed on the upper portion of the right surface (the surface facing inward in the vehicle width direction) of the first bracket 21L. The second side wall portion 22C extends downward from the right end of the upper wall portion 22A. The second side wall portion 22C is disposed to the right of the first side wall portion 22B with a gap therebetween. The second side wall portion 22C is disposed on the left surface side (the surface on the inner side in the vehicle width direction) of the second bracket 21R.

[0030] As shown in FIGS. 5 and 6 , first side wall portion 22B is pivotally supported on first bracket 21L via tilt shaft 25 (referred to as first tilt shaft 25L). As shown in FIGS. 6 and 9 , a support plate 34 is disposed on the right surface of first side wall portion 22B. First tilt shaft 25L is fixed to the upper part of support plate 34. First tilt shaft 25L penetrates through a vertically middle portion of first side wall portion 22B and the upper rear portion of first bracket 21L. First tilt shaft 25L has a male threaded portion and is attached to first bracket 21L by screwing a nut 35 onto the male threaded portion (male threads mating with female threads).

[0031] A support shaft 36 is fixed to the front part of the support plate 34, midway in the up-down direction. The support shaft 36 passes through the first bracket 21L. The support shaft 36 has a male threaded portion, and is attached to the first bracket 21L by threading a nut 37 onto the male threaded portion. The support plate 34 is fixedly attached to the first bracket 21L by the first tilt shaft 25L and nut 35, and the support shaft 36 and nut 37.

[0032] With the above configuration, the first side wall portion 22B is supported by the first bracket 21L and the support plate 34 so as to be rotatable about the axis (tilt axis X1) of the first tilt shaft 25L.

[0033] As shown in Figures 5 and 6, second side wall portion 22C is pivotally supported on second bracket 21R via tilt shaft 25 (referred to as second tilt shaft 25R). Second tilt shaft 25R is fixed to a plate member 46 located on the left surface of second side wall portion 22C. Plate member 46 is attached to second bracket 21R with bolts 48. Second tilt shaft 25R penetrates the lower part of second side wall portion 22C and the rear part of the lower part of second bracket 21R. Second tilt shaft 25R has a male threaded portion and is attached to second bracket 21R by threading a nut 66 onto the male threaded portion.

[0034] With the above configuration, the lower portion of second side wall portion 22C is supported by second bracket 21R so as to be rotatable about the axis (tilt axis X1) of second tilt shaft 25R.

[0035] As described above, the movable bracket 22 is supported by the fixed bracket 21 so as to be rotatable about the tilt axis X1 by the first tilt shaft 25L and the second tilt shaft 25R.

[0036] In this embodiment, tilt axis 25 includes first tilt axis 25L and second tilt axis 25R, but this is not limited to this, and tilt axis 25 may be formed by a single axis.

[0037] As shown in Figure 5, a circular opening 23 is formed in the upper wall portion 22A. The opening 23 is formed by penetrating the upper wall portion 22A. A first attachment piece 62 extending upward is provided at the rear edge of the upper wall portion 22A. A second attachment piece 63 extending forward is provided at the front edge of the upper wall portion 22A.

[0038] As shown in Figures 7 and 8, a steering post 27 is attached to the movable bracket 22. More specifically, as shown in Figure 8, the steering post 27 has an outer cylinder 27A and an inner cylinder 27B. As shown in Figure 7, a first mounting bracket 64 and a second mounting bracket 65 are fixed to the lower part of the outer cylinder 27A. The first mounting bracket 64 is fixed to the first mounting piece 62 with bolts, and the second mounting bracket 65 is fixed to the second mounting piece 63 with bolts. In this way, the steering post 27 is attached to the movable bracket 22.

[0039] As shown in FIG. 7, a steering shaft 26 is supported on a steering post 27 so as to be rotatable about its axis.

[0040] Therefore, the steering shaft 26 can tilt (tilt) about the tilt axis X1 by rotating the movable bracket 22 about the tilt axis X1 (tilt axis 25) relative to the fixed bracket 21. The tilt axis 25 (first tilt axis 25L and second tilt axis 25R) is the center of the tilting movement (tilt movement) of the steering shaft 26, and the tilt angle of the steering shaft 26 can be adjusted (tilt adjustment) about the tilt axis X1.

[0041] 9, 10, and 11, the tractor 1 has a first locking portion 61 that locks the steering shaft 26 at an adjusted tilt angle. The first locking portion 61 has a first meshing portion 24 and a locking member (referred to as the first locking member) 40.

[0042] As shown in FIGS. 9 , 10 , and 11 , the first meshing portion 24 is formed at the lower end of the first side wall portion 22B. The first meshing portion 24 has a plurality of engagement teeth 24a. The plurality of engagement teeth 24a are formed in the circumferential direction around the tilt axis X1. A restriction hole 38 is formed in the first side wall portion 22B between the first tilt axis 25L and the first meshing portion 24. The restriction hole 38 is formed to penetrate the first side wall portion 22B. The restriction hole 38 is formed as an elongated hole in an arc shape centered on the tilt axis X1. A restriction pin 39 is inserted through the restriction hole 38. The restriction pin 39 is fixed to the support plate 34. Therefore, the movable bracket 22 can tilt within a range in which the restriction pin 39 moves relatively from one end to the other end within the restriction hole 38.

[0043] As shown in FIG. 11 , the first locking member 40 is disposed below the first side wall portion 22B. Also, as shown in FIG. 9 , the first locking member 40 is disposed between the first bracket 21L and the support plate 34. Furthermore, as shown in FIG. 11 , the front portion of the first locking member 40 is supported by the support shaft 36 so as to be rotatable about an axis extending in the vehicle width direction. As shown in FIG. 11 , a second meshing portion 41 including a plurality of engagement teeth 41 a is formed at the upper end of the rear portion of the first locking member 40. The second meshing portion 41 is capable of meshing with the first meshing portion 24. The plurality of engagement teeth 41 a are formed in the circumferential direction about the tilt axis X1 when the second meshing portion 41 is meshed with the first meshing portion 24. When the engagement teeth 24a of the first meshing portion 24 and the engagement teeth 41a of the second meshing portion 41 mesh with each other, the first locking portion 61 is brought into a locked state, restricting the swing of the movable bracket 22. This makes it possible to lock the steering shaft 26 at the adjusted tilt angle.

[0044] When the first locking member 40 swings downward and the second meshing portion 41 moves away from the first meshing portion 24 (see Figure 14), the movable bracket 22 is allowed to swing (the lock by the first locking portion 61 is released), and the tilt angle of the steering shaft 26 becomes adjustable.

[0045] As shown in FIGS. 9, 10 and 11, an engagement pin 67 is fixed to the lower rear portion of the first locking member 40 so as to protrude rightward.

[0046] 9, 10, and 11, the tractor 1 has a first operating body 43 that releases the lock provided by the first locking unit 61, and a rotating shaft 44 that rotates to operate the first operating body 43 to release the lock provided by the first locking unit 61. The first operating body 43 is disposed on the right side of the first locking member 40 (to the right of the support plate 34).

[0047] As shown in Figures 9 and 11 , the first operating body 43 is attached to the pivot shaft 44 so as to be integrally rotatable. Specifically, the pivot shaft 44 has an axis extending in the vehicle width direction and is supported by a support bracket 68 fixed to the left surface of the first bracket 21L, the first bracket 21L, and the support plate 34 so as to be rotatable about the axis. As shown in Figure 10 , the support bracket 68 has a front wall 68a and a rear wall 68b spaced apart in the fore-and-aft direction, and a side wall 68c connecting the left ends of the front wall 68a and the rear wall 68b, with the right ends of the front wall 68a and the rear wall 68b fixed to the left surface of the first bracket 21L. The pivot shaft 44 penetrates the side wall 68c of the support bracket 68, the first bracket 21L, and the support plate 34. The pivot shaft 44 protrudes rightward from the support plate 34. A first operating body 43 is attached to the portion of the rotary shaft 44 that protrudes from the support plate 34 so as not to be rotatable relative to the rotary shaft 44 (but can be rotated integrally with the rotary shaft 44).

[0048] 12 , the first operating body 43 is disposed in an inclined manner that gradually increases in height toward the rear. A spring hook 70 is provided at the bottom of the first operating body 43 in the inclined direction D1, and an engagement groove 69 is formed at the top of the first operating body 43 in the inclined direction D1. The portion of the first operating body 43 between the spring hook 70 and the engagement groove 69 is attached to the rotation shaft 44.

[0049] As shown in FIG. 12 , a spring hook pin 72 is disposed below the spring hook portion 70. The spring hook pin 72 is fixed to the first bracket 21L (see FIG. 11 ). A biasing member 73 is provided between the spring hook portion 70 and the spring hook pin 72. The biasing member 73 is configured by a tension coil spring. In FIG. 12 , the first operating body 43 is biased by the biasing member 73 so that the upper portion in the inclination direction D1 rotates clockwise D3 (upward in the circumferential direction D2 about the axis X2 of the rotation shaft 44). In other words, the biasing member 73 biases the first operating body 43 upward in the circumferential direction D2 about the axis X2 of the rotation shaft 44.

[0050] As shown in FIG. 12 , the engagement pin 67 is inserted into the engagement groove 69. The engagement groove 69 is formed elongated in the circumferential direction D2 around the axis X2 of the pivot shaft 44. The engagement groove 69 includes a first groove portion 69a and a second groove portion 69b. The first groove portion 69a is a portion of the engagement groove 69 on the lower side in the circumferential direction D2. The second groove portion 69b is a portion of the engagement groove 69 on the upper side in the circumferential direction D2. The engagement groove 69 is formed in a stepped shape by the first groove portion 69a and the second groove portion 69b. More specifically, the first groove portion 69a is shifted in position away from the pivot shaft 44 relative to the second groove portion 69b in the tilt direction D1 of the first operating body 43. A step portion 74 is formed between an upper edge 69c of the first groove portion 69a and an upper edge 69d of the second groove portion 69b.

[0051] As will be described later, the first groove portion 69a is a portion in which the engagement pin 67 is positioned when the locking member (first locking member 40) locks the rotation of the movable bracket 22 around the tilt axis 25 (first tilt axis 25L, second tilt axis 25R), and the second groove portion 69b is a portion that operates the locking member to push the engagement pin 67 when the first operating body 43 rotates together with the rotation axis 44 from a state in which the engagement pin 67 is positioned in the first groove portion 69a, thereby unlocking the rotation of the movable bracket 22 around the tilt axis 25.

[0052] As shown in Figures 4, 9, and 10, the tractor 1 is equipped with a pedal 47 attached to the rotating shaft 44 so as to be rotatable integrally therewith. The front portion of the upper part of the pedal 47 is attached to the left end of the rotating shaft 44. A foot pedal 47a is provided at the bottom of the pedal 47 for the operator to step on (to operate the pedal 47 with their foot). By stepping on the pedal 47, the rotating shaft 44 rotates, and the first operating body 43 rotates downward together with the rotating shaft 44 about the axis X2 of the rotating shaft 44. In other words, the first operating body 43 is rotated by the pedal 47.

[0053] As shown in Figure 4, the lower end of a return spring 75 is hooked to the rear of the upper part of the pedal 47. The upper end of the return spring 75 is hooked to a spring hook 76 provided on the frame portion 30b of the support body 30. The return spring 75 is formed of a tension coil spring. The position of the pedal 47 shown in Figures 4 and 11 is a non-depressed position P1 where the pedal 47 is not depressed (operated with foot) by the operator, and the return spring 75 returns the pedal 47 to the non-depressed position P1 (holds the pedal 47 at the non-depressed position P1) when the operator is not depressing the pedal 47 with his foot.

[0054] As shown in FIG. 11 , when the pedal 47 is in the non-depressed position P1, the engagement pin 67 is in a position where it abuts against the lower end of the engagement groove 69 (first groove portion 69 a) in the circumferential direction D2. When the pedal 47 is in the non-depressed position P1, the second meshing portion 41 is engaged with the first meshing portion 24, and tilting of the steering shaft 26 is not possible. In other words, the first locking portion 61 is in a locked state. When the engagement pin 67 is in a position where it abuts against the lower end of the engagement groove 69 in the circumferential direction D2, the first locking member 40 cannot pivot downward. In other words, the locked state of the first locking portion 61 is maintained. Therefore, the first operating body 43 is a member that releases the lock provided by the first locking portion 61 and also a member that maintains the locked state of the first locking portion 61.

[0055] 13 , even when the pedal 47 is depressed from the non-depressed position P1 to a position where the stepped portion 74 abuts the engagement pin 67 (referred to as a first depressed position P2), the second meshing portion 41 remains engaged with the first meshing portion 24. In other words, the first locking portion 61 remains in the locked state. At this time, in this embodiment, the upper edge of the first groove portion 69 a is configured to begin to press down the engagement pin 67. However, without being limited thereto, the upper edge 69 c of the first groove portion 69 a does not necessarily have to begin to press down the engagement pin 67 when the pedal 47 is depressed to the first depressed position P2.

[0056] Next, when the pedal 47 is further depressed from the first depression position P2, as shown in FIG. 14 , the first operating body 43 rotates downward, and the engagement pin 67 is positioned in the second groove portion 69b. At this time, the engagement pin 67 is pushed down by the step portion 74 and the upper edge 69d of the second groove portion 69b. As a result, the first locking member 40 swings downward about the axis X3 of the support shaft 36, and the second meshing portion 41 moves away from the first meshing portion 24. In other words, the lock by the first locking portion 61 is released. The position of the pedal 47 in the state shown in FIG. 14 is referred to as the second depression position P3. There is resistance when depressing the pedal 47 from the first depression position P2 to the second depression position P3, and this resistance informs the operator that the lock by the first locking portion 61 has been released.

[0057] Next, as shown in Figure 15, when the pedal 47 is depressed from the second depression position P3 to a position (referred to as the third depression position P4) where the upper end of the second groove portion 69b (engagement groove 69) in the circumferential direction D2 abuts the engagement pin 67, the upper edge 69d of the second groove portion 69b simply slides against the engagement pin 67, and the lock by the first lock portion 61 remains released.

[0058] As shown in Figure 4, the tractor 1 is provided with a biasing member 77 that biases the movable bracket 22 forward. This biasing member 77 is formed of a tension coil spring, one end of which is hooked to a spring hook portion 78 provided on the movable bracket 22 and the other end of which is hooked to a spring hook portion 79 provided on the frame portion 30b. The fixed bracket 21 is provided with a stopper 80 that restricts the forward swing of the movable bracket 22 by coming into contact with the stopper 80.

[0059] When the operator dismounts from the tractor 1, to make dismounting easier, he / she releases the lock provided by the first locking section 61 and moves the steering shaft 26 and steering handle 19 forward. At this time, the force of the biasing member 77 can assist in the operation of moving the steering shaft 26 and steering handle 19 forward.

[0060] 8, the outer cylinder 27A is provided so as to communicate with the opening 23. The inner cylinder 27B is inserted into the outer cylinder 27A. The inner cylinder 27B is movable in the axial direction relative to the outer cylinder 27A.

[0061] As shown in Figure 8, the steering shaft 26 has a first shaft 28 and a second shaft 29. The first shaft 28 is disposed within the inner cylinder 27B, and its lower portion passes through the opening 23 and protrudes downwardly from the upper wall portion 22A. The lower portion of the first shaft 28 is supported by a bearing body 31 fixed to the upper wall portion 22A so as to be rotatable about its axis. The upper portion of the bearing body 31 is fixed to the inner circumferential surface of the opening 23 and protrudes downwardly from the upper wall portion 22A. The lower portion of the first shaft 28 protrudes downwardly from the bearing body 31. A universal joint 81 shown in Figures 2 and 3 is connected to this protruding portion.

[0062] 2 and 3, a transmission shaft 82 is connected to the universal joint 81. The transmission shaft 82 passes through an opening 83 formed in the base portion 30a of the support body 30. The transmission shaft 82 is operatively connected to a steering valve (not shown). The steering valve is a rotary valve that is operated by the steering shaft 26 and outputs hydraulic oil that actuates the steering cylinder 16. The steering valve does not have to be directly connected to the transmission shaft 82.

[0063] As shown in FIG. 8 , the second shaft 29 has a lower shaft portion 29A and an upper shaft portion 29B. The lower shaft portion 29A is cylindrical. The lower portion of the upper shaft portion 29B is fixed to the upper portion of the lower shaft portion 29A. The lower shaft portion 29A is disposed within the inner cylinder 27B. The lower shaft portion 29A is spline-coupled to the first shaft 28. Therefore, the second shaft 29 is movable in the axial direction relative to the first shaft 28. In other words, the steering shaft 26 is extendable in the axial direction, and its length can be adjusted by extension and retraction. The first shaft 28 and the second shaft 29 are rotatable together about their axes.

[0064] The upper shaft portion 29B protrudes upward from the inner cylinder 27B. The steering handle 19 is attached to the upper portion of the upper shaft portion 29B.

[0065] 8, a bearing member 84 is fixedly provided on the upper part of the inner cylinder 27B. The upper shaft portion 29B is inserted through the bearing member 84. The upper shaft portion 29B is supported by the bearing member 84 so as to be rotatable relative to the inner cylinder 27B about the axis. The second shaft 29 and the inner cylinder 27B are also movable integrally in the axial direction.

[0066] 7 and 17, the tractor 1 has a second locking unit 20 that locks the steering shaft 26 at an adjusted length. The second locking unit 20 has a locking member (referred to as a second locking member) 33 that restricts the extension and contraction of the steering shaft 26.

[0067] 7 and 8, the second locking member 33 is provided on the upper part of the outer cylinder 27A. The second locking member 33 is formed in a cylindrical shape and fitted onto the outside of the inner cylinder 27B so as to be relatively movable in the axial direction (up and down).

[0068] 18 and 19, the upper portion 33A of the second locking member 33 is formed in a cylindrical shape. The lower portion of the second locking member 33 is formed as a tapered portion 33B in the shape of a truncated cone that tapers downward. More specifically, the tapered portion 33B is formed as a tapered surface whose outer shape gradually decreases in diameter (the diameter gradually decreases) as it extends downward, and is formed in an outer cone shape.

[0069] 17, the second locking portion 20 has an insertion portion 27a that engages with the tapered portion 33B of the second locking member 33. The insertion portion 27a is formed on the upper part of the outer tube 27A. The inner surface of the insertion portion 27a is formed into a tapered surface that gradually increases in diameter (the diameter gradually expands) as it extends upward.

[0070] 17 shows the second locking member 33 in the locked position. In this locked position, the tapered portion 33B of the second locking member 33 is pressed between the insertion portion 27a and the inner cylinder 27B. Therefore, in the locked position, the second locking member 33 restricts relative movement between the outer cylinder 27A and the inner cylinder 27B by wedging action. This allows the steering shaft 26 to be locked at the adjusted length.

[0071] 22 shows the fully raised position, which is the position where the second locking member 33 is moved most upward from the locked position. At this fully raised position, the second locking member 33 is displaced upward from the locked position relative to the insertion portion 27a. Therefore, at the fully raised position, a gap is formed between the insertion portion 27a and the tapered portion 33B, which releases the wedging action and allows relative movement between the outer tube 27A and the inner tube 27B. This allows the steering shaft 26 to extend and retract, allowing the length of the steering shaft 26 to be adjusted.

[0072] 16, 18, and 19, the tractor 1 has a second operating body 51 that releases the lock provided by the second locking unit 20. The second operating body 51 supports the second locking member 33 so that the second locking member 33 can move up and down. The second operating body 51 has a first member 52 and a second member 53.

[0073] As shown in Figures 18 and 19, the first member 52 has a first portion 52a located to the left of the second locking member 33, a second portion 52b extending leftward from the lower front portion of the first portion 52a, a third portion 52c extending rearward and downward from the lower rear portion of the first portion 52a, a fourth portion 52d extending rightward from the rear end of the third portion 52c, and a fifth portion 52e extending leftward from the upper rear portion of the first portion 52a.

[0074] The first portion 52a has an upwardly convex, arc-shaped groove 54 at the rear of its upper portion. The groove 54 is formed to penetrate the first member 52 (first portion 52a). A roller 56 is fitted in the groove 54 so as to be rotatable about an axis extending in the vehicle width direction and movable in the longitudinal direction of the groove.

[0075] As shown in FIG. 17, a pin portion 57 provided on the upper portion 33 A of the second locking member 33 is inserted into the roller 56 .

[0076] As shown in Fig. 18, a cylindrical support shaft member 55 penetrates below the front portion of the groove portion 54 in the first member 52. As shown in Fig. 17, the support shaft member 55 is fixed to the outer surface of the upper part of the outer cylinder 27A. A long groove 58 that is long in the up-down direction is formed in the front portion of the first portion 52a. The long groove 58 is formed to penetrate the first member 52 (first portion 52a).

[0077] As shown in Figures 18 and 19, the second member 53 has a first portion 53a located to the right of the second locking member 33, a second portion 53b extending forward from the lower front portion of the first portion 53a, a third portion 53c extending leftward from the front end portion of the second portion 53b, a fourth portion 53d extending rearward and downward from the lower rear portion of the first portion 53a, a fifth portion 53e extending leftward from the rear end of the fourth portion 53d, and a sixth portion 53f extending rightward from the upper rear portion of the first portion 53a.

[0078] The third portion 53c is overlapped with the second portion 52b of the first member 52 and connected to them by fasteners (bolts and nuts) 85. The fifth portion 53e is overlapped with the fourth portion 52d of the first member 52 and connected to them by fasteners (bolts and nuts) 86.

[0079] The first portion 53a of the second member 53 has an arc-shaped groove 54 at the rear of the upper portion, similar to the first member 52. A roller 56 is fitted in the groove 54 so as to be rotatable about an axis extending in the vehicle width direction and movable in the longitudinal direction of the groove.

[0080] As shown in FIG. 17, a pin portion 57 provided on the upper portion 33 A of the second locking member 33 is inserted into the roller 56 .

[0081] 19, a cylindrical support shaft member 55 penetrates below the front portion of the groove portion 54 in the second member 53. As shown in Fig. 17, the support shaft member 55 is fixed to the outer surface of the upper portion of the outer cylinder 27A.

[0082] 17 , the axis X4 of the support shaft member 55 of the first member 52 and the axis X5 of the support shaft member 55 of the second member 53 are concentric. The second operating body 51 is supported by the outer cylinder 27A so as to be swingable about the axes X4 and X5 of the support shaft member 55.

[0083] As shown in Figure 17, a rotation-preventing member 60 is attached to the support shaft member 55 of the first member 52. The rotation-preventing member 60 passes through the outer tube 27A. A rotation-preventing portion 60a is formed on the rotation-preventing member 60. The rotation-preventing portion 60a passes through the inner tube 27B of the steering post 27. The rotation-preventing portion 60a restricts rotation of the inner tube 27B about the axis relative to the outer tube 27A.

[0084] The insertion hole 87 formed in the inner cylinder 27B for inserting the anti-rotation portion 60a is formed long in the axial direction of the inner cylinder 27B, thereby allowing axial movement of the inner cylinder 27B relative to the outer cylinder 27A. Furthermore, the steering shaft 26 is extendable and contractible within a range in which the anti-rotation portion 60a moves relatively between the upper and lower ends of the insertion hole 87.

[0085] 2 and 3, the upper ends of biasing members 88, each formed of a tension coil spring, are hooked to the fifth portion 52e of the first member 52 and the sixth portion 53f of the second member 53. The lower ends of the biasing members 88 are hooked to spring hook members 89 fixed to the movable bracket 22. The biasing members 88 bias the second operating body 51 downward (in the direction in which it is pulled down). In other words, the biasing members 88 bias the second operating body 51 in the direction in which the tapered portion 33B of the second locking member 33 is inserted into the insertion portion 27a.

[0086] As shown in Figures 18 and 19, the second operating body 51 is directly or indirectly connected to the pedal 47 via an interlocking link 71. The second operating body 51 releases the lock provided by the second locking unit 20 in response to depression of the pedal 47. Specifically, as shown in Figures 10, 18, and 19, the tractor 1 includes a coupling portion 90 attached to the pivot shaft 44. The coupling portion 90 is formed of a plate material and includes a base portion 90a, a connection portion 90b, and a link connection portion 90c. The base portion 90a is disposed between the side wall 68c of the support bracket 68 and the upper portion of the pedal 47, and its front portion is fixedly attached to the pivot shaft 44. The connection portion 90b connects the base portion 90a and the link connection portion 90c and extends rightward from the rear end of the base portion 90a. The link connection portion 90c extends rearward from the right end of the connection portion 90b. The link connection portion 90c is located rearward of the support bracket 68. One end portion 71a of the interlocking link 71 is connected to the rear portion of the link connection portion 90c. The interlocking link 71 is formed from a cylindrical rod. The one end portion 71a of the interlocking link 71 has an axis extending in the vehicle width direction, and is connected to the link connection portion 90c so as to be rotatable about the axis of the one end portion 71a. The other end portion 71b of the interlocking link 71 has an axis extending in the vehicle width direction, and is inserted into the long groove 58. The other end portion 71b is movable within the long groove 58.

[0087] As shown in Figure 16, the main body portion 71c of the interlocking link 71 extends upward from one end portion 71a, then bends at the upper end of the first bracket 21L and extends in an inclined direction that transitions rearward as it goes upward along the handle post, and then bends near the second operating body 51 and extends upward to connect to the other end portion 71b.

[0088] Furthermore, the interlocking link 71 (main body portion 71c) is disposed so as to pass near the tilt axis X1 (tilt axis 25) in a side view (seen from the direction of the axis X1 of the tilt axis 25). This makes it possible to suppress variation in the amount of depression of the pedal 47 when releasing the second operating body 51, depending on the angle at which the steering shaft 26 is tilted.

[0089] 20 shows the second locking member 33 in the locked position. The second locking member 33 is in the locked position when the pedal 47 is not depressed by the operator (when the pedal 47 is in the non-depressed position P1). In this state, the roller 56 is located at the front end of the groove 54. The other end portion 71b of the interlocking link 71 is inserted into the long groove 58 with a certain distance between it and the lower end of the long groove 58. The center X6 of the arc of the arc-shaped groove 54 is located below the support shaft 55 and is at a different position from the axes X4 and X5 of the support shaft 55.

[0090] When the pedal 47 is depressed a predetermined amount from the state shown in Figure 20, the depression of the pedal 47 pulls the interlocking link 71 down, and as shown in Figure 21, the other end portion 71b of the interlocking link 71 abuts against the lower end of the long groove 58. The second operating body 51 does not move until the other end portion 71b of the interlocking link 71 abuts against the lower end of the long groove 58. In other words, the second locking member 33 remains in the locked position. Furthermore, by the time the other end portion 71b of the interlocking link 71 abuts against the lower end of the long groove 58, the first operating body 43 releases the lock provided by the first locking unit 61. In other words, the lock provided by the first locking unit 61 is released before the lock provided by the second locking unit 20 is released. Furthermore, when the other end portion 71b of the interlocking link 71 is in contact with the lower end of the elongated groove 58, there is a distance between the engagement pin 67 and the upper end of the engagement groove 69 in the circumferential direction D2 (see, for example, FIG. 14 ), and the pedal 47 can still be depressed. Furthermore, when the lock by the first locking portion 61 is released and the other end portion 71b of the interlocking link 71 is in contact with the lower end of the elongated groove 58, resistance is provided by the biasing member 88 when depressing the pedal 47, so the pedal 47 can easily be maintained in a position where the lock by the first locking portion 61 is released but the lock by the second locking portion 20 is not released.

[0091] When the pedal 47 is further depressed from the state shown in Figure 21, the front portion of the second operating body 51 is pulled down by the interlocking link 71. Then, as shown in Figure 22, the second operating body 51 rotates about the axes X4 and X5 of the support shaft member 55. At this time, the second operating body 51 rotates so that the rear portion moves upward. When the second operating body 51 rotates so that the rear portion of the second operating body 51 moves upward, the roller 56 is pushed up by the lower edge of the groove portion 54, which pushes up the second locking member 33, and the wedging action of the second locking member 33 is released. This makes it possible to adjust the length of the steering shaft 26.

[0092] 22, with the roller 56 positioned at the rear end of the groove 54, the engagement pin 67 is positioned at the upper end of the engagement groove 69 in the circumferential direction D2, as shown in FIG.

[0093] As described above, the long groove 58 allows the other end portion 71b of the interlocking link 71 to move relatively within the long groove 58 so that when the pedal 47 is depressed a predetermined amount from the non-depressed position P1, the lock on the rotation of the movable bracket 22 around the tilt axis 25 is released before the second operating body 51 releases the lock by the second locking section 20.

[0094] In the tractor 1 configured as described above, as shown in Fig. 16, the pivot shaft 44, the connecting portion 90, and the interlocking link 71 constitute an interlocking mechanism 49 that interlocks the pedal 47 with the first operating body 43 and the second operating body 51. By configuring the interlocking mechanism 49 that interlocks the pedal 47 with the first operating body 43 and the second operating body 51 with the pivot shaft 44, the connecting portion 90, and the interlocking link 71, it is possible to reduce the number of parts of the interlocking mechanism 49 compared to conventional interlocking mechanisms. This makes it possible to suppress variations in operation.

[0095] In the above configuration, the connecting portion 90 is attached to the rotating shaft 44, but this is not limiting, and the connecting portion 90 may be provided on the pedal 47 as shown in Fig. 10. In this case, the connecting portion 90 may be formed by a part of the member that forms the pedal 47, or may be formed by a member different from the member that forms the pedal 47 and fixed to the pedal 47.

[0096] A preferred embodiment of the present invention provides a traveling vehicle 1 described in the following items.

[0097] (Item 1) A traveling vehicle 1 includes a steering shaft 26 to which a steering handle 19 is attached, the steering shaft 26 having a variable tilt angle and an adjustable length, a first locking unit 61 that locks the steering shaft 26 at a changed tilt angle, a first operating body 43 that releases the locking by the first locking unit 61, a second locking unit 20 that locks the steering shaft 26 at an adjusted length, and a second operating body 51 that releases the locking by the second locking unit 20, and the first operating body 43 is supported so as to be rotatable about an axis. A traveling vehicle 1 is provided with: a pivot shaft 44 that is attached so as to be rotatable together and that operates the first operating body 43 by rotating to release the lock by the first locking unit 61; a pedal 47 that is attached so as to be rotatable together with the pivot shaft 44 and that rotates the pivot shaft 44 by stepping on it; a connecting part 90 that is attached so as to be rotatable together with the pedal 47 or the pivot shaft 44; and an interlocking link 71 that connects the connecting part 90 and the second operating body 51 to operate the second operating body 51 to release the lock by the second locking unit 20 by rotating the pivot shaft 44.

[0098] According to the traveling vehicle 1 according to this item 1, it is possible to reduce the number of parts of the interlocking mechanism 49 that interlocks the pedal 47 with the first operating body 43 and the second operating body 51, thereby simplifying the structure. This makes it possible to suppress variations in operation.

[0099] (Item 2) The traveling vehicle 1 according to Item 1, wherein the connecting portion 90 is attached to the rotating shaft 44.

[0100] According to the traveling vehicle 1 according to this item 2, by attaching the connecting portion 90 to the rotating shaft 44, the configuration of the pedal 47 can be simplified.

[0101] (Item 3) The steering apparatus includes a tilt axis 25 that is the center of tilting movement of the steering shaft 26, and a movable bracket 22 to which the steering shaft 26 is attached, the movable bracket 22 being supported so as to be rotatable around the tilt axis 25, the first locking portion 61 has a locking member 40 that is detachably engaged with the movable bracket 22 to lock the rotation of the movable bracket 22 around the tilt axis 25, and an engagement pin 67 provided on the locking member 40, and the first operating body 43 has a locking member 40 through which the engagement pin 67 is inserted. 3. The traveling vehicle 1 according to item 1 or 2, which has an engagement groove 69, the engagement groove 69 having a first groove portion 69a in which the engagement pin 67 is positioned when the locking member 40 locks the rotation of the movable bracket 22 about the tilt axis 25, and a second groove portion 69b that operates the locking member 40 to push the engagement pin 67 when the first operating body 43 rotates together with the rotation axis 44 from a state in which the engagement pin 67 is positioned in the first groove portion 69a, thereby unlocking the rotation of the movable bracket 22 about the tilt axis 25.

[0102] According to the running vehicle 1 relating to this item 3, the first operating body 43 is operated by the pivot shaft 44 which is directly rotated by the pedal 47, and the first operating body 43 pushes the engagement pin 67, whereby the locking member 40 unlocks the rotation of the movable bracket 22 around the tilt axis 25, thereby suppressing variations in the operation of the locking member 40.

[0103] (Item 4) The interlocking link 71 has one longitudinal end portion 71 a connected to the connecting portion 90, the second operating body 51 has a long groove 58 into which the other longitudinal end portion 71 b of the interlocking link 71 is inserted, and the long groove 58 allows the other end portion 71 b of the interlocking link 71 to move relatively within the long groove 58 so that the rotation of the movable bracket 22 about the tilt axis 25 is unlocked before the second operating body 51 releases the lock by the second locking portion 20 when the pedal 47 is depressed a predetermined amount from the non-depressed position P1.

[0104] According to the traveling vehicle 1 relating to this item 4, the structure of the interlocking mechanism 49 that interlocks the pedal 47 with the first operating body 43 and the second operating body 51 can be simplified, and variation in operation can be suppressed.

[0105] (Item 5) The second groove portion 69b is formed with a groove length that allows the other end portion 71b of the interlocking link 71 to push the end of the long groove 58 and operate the second operating body 51 to release the lock by the second lock portion 20 by further depressing the pedal 47 after the lock on the rotation of the movable bracket 22 around the tilt axis 25 has been released.

[0106] According to the traveling vehicle 1 according to this item 5, the structure can be simplified.

[0107] (Item 6) The traveling vehicle 1 according to any one of Items 3 to 5, wherein the interlocking link 71 is disposed between the connecting portion 90 and the second operating body 51 so as to pass near the tilt shaft 25 when viewed from the axial direction of the tilt shaft 25.

[0108] According to the traveling vehicle 1 according to this item 6, the amount of depression of the pedal 47 when releasing the second operating body 51 can be prevented from varying depending on the angle at which the steering shaft 26 is tilted.

[0109] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0110] 19 Steering handle 20 Second locking portion 22 Movable bracket 25 Tilt axis 26 Steering shaft 40 Locking member 43 First operating body 44 Rotating axis 47 Pedal 51 Second operating body 58 Long groove 61 First locking portion 67 Engagement pin 69 Engagement groove 69a First groove portion 69b Second groove portion 71 Interlocking link 71a One end portion 71b Other end portion 90 Connecting portion P1 Non-depressed position

Claims

1. A traveling vehicle comprising: a steering shaft to which a steering handle is attached, the steering shaft having a variable tilt angle and an adjustable length; a first locking unit that locks the steering shaft at a changed tilt angle; a first operating body that releases the lock set by the first locking unit; a second locking unit that locks the steering shaft at an adjusted length; and a second operating body that releases the lock set by the second locking unit; a rotating shaft that is supported to be rotatable about its axis and is attached to be rotatable as one unit with the first operating body, and that operates the first operating body by rotating to release the lock set by the first locking unit; a pedal that is attached to the rotating shaft to be rotatable as one unit and that rotates by stepping on it; a connecting unit that is attached to the pedal or the rotating shaft to be rotatable as one unit; and an interlocking link that connects the connecting unit and the second operating body, so that the second operating body is operated to release the lock set by the second locking unit by rotating the rotating shaft.

2. A vehicle according to claim 1, wherein the connecting portion is attached to the pivot shaft.

3. A traveling vehicle as claimed in claim 1 or 2, comprising: a tilt axis that is the center of tilting movement of the steering shaft; and a movable bracket to which the steering shaft is attached, the movable bracket being supported so as to be rotatable about the tilt axis; wherein the first locking portion has a locking member that engages with the movable bracket in a manner that allows it to be engaged or disengaged, thereby locking the rotation of the movable bracket about the tilt axis, and an engagement pin provided on the locking member; the first operating body has an engagement groove through which the engagement pin is inserted, and the engagement groove has: a first groove portion in which the engagement pin is located when the locking member has locked the rotation of the movable bracket about the tilt axis; and a second groove portion that operates the locking member to push the engagement pin when the first operating body rotates together with the rotation axis from a state in which the engagement pin is located in the first groove portion, thereby unlocking the rotation of the movable bracket about the tilt axis.

4. A running vehicle as described in claim 3, wherein one longitudinal end portion of the interlocking link is connected to the connecting portion, and the second operating body has a long groove through which the other longitudinal end portion of the interlocking link is inserted, and the long groove allows the other end portion of the interlocking link to move relatively within the long groove so that, when the pedal is depressed a predetermined amount from a non-depressed position, the lock on the rotation of the movable bracket about the tilt axis is released before the second operating body releases the lock by the second locking portion.

5. A running vehicle as described in claim 4, wherein the second groove portion is formed with a groove length that allows the other end of the interlocking link to push the end of the long groove and operate the second operating body to release the lock by the second lock portion by further depressing the pedal after the movable bracket has been unlocked from rotation around the tilt axis.

6. A traveling vehicle as described in claim 3, wherein the interlocking link is arranged between the connecting portion and the second operating body so as to pass near the tilt axis when viewed from the axial direction of the tilt axis.

Images