JP2007314108A - Tilt mechanism of steering wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive tilt mechanism for a steering wheel, capable of largely turning a steering wheel to an operator side only during maintenance, except when a working vehicle is maneuvered by a driver. <P>SOLUTION: This tilt mechanism turnably supports a mounting bracket 25 provided with a steering column 23 attached on the main body side for supporting the steering wheel 6 mounted on a working vehicle (tractor 1). A tilt operation lever 33 is turnably provided on the steering handle 6 side. A retaining mechanism 22 for a tilting angle includes a locking member 33b mounted on the top end of the tilt operation lever 33 and a locked member 34 mounted on the main body side allowing locking with the locking member 33b in a plurality of positions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique of a tilt mechanism of a steering handle in a work vehicle such as a tractor.

  2. Description of the Related Art Conventionally, a work vehicle such as a tractor is provided with a tilt mechanism that can be adjusted to an appropriate steering handle position in accordance with the body shape of a driver. The tilt mechanism is a mechanism in which a steering shaft is provided with a pivot shaft, and the steering handle is freely pivoted or fixed to the front and rear sides in the traveling direction, and is mainly disposed in the lower front part of the cockpit. It is operated by a tilt pedal or a tilt lever provided in the vicinity of the clutch pedal or the like. Therefore, the operator can easily adjust the position of the steering handle to an appropriate position corresponding to his / her body shape while sitting in the cockpit.

On the other hand, the steering handle whose position has been adjusted by the tilt mechanism is an appropriate position for the operator to steer the work vehicle, but is usually a position close to the operator, so that the operator can work. When the vehicle is lifted or lowered from the vehicle, it is necessary to rotate the steering handle to the bonnet side again. In order to safely perform the turning operation of the steering handle, a technique described in “Patent Document 1” is publicly known.
JP 61-200052 A

In the “Patent Document 1”, in the conventional steering handle tilt mechanism, when the steering handle is largely rotated toward the bonnet side, the brake mechanism of the work vehicle is forcibly operated. As a result, the operator can safely adjust the position of the steering wheel and release the steering wheel.
However, the tilt angle change range by the tilt mechanism has been limited from the vicinity of the operation panel to the vicinity of the driver seated in the cockpit, and it is difficult to maintain a dash when performing maintenance on the base of the steering wheel or its front. It is necessary to remove the cover of the board, and the seat is configured to be able to rotate forward, but when it is tilted forward, the backrest hits the steering handle and cannot be rotated further. It was difficult to work when performing maintenance. In particular, in the case of the cabin specification, the space occupied by the seats in the cabin is large, which sometimes hinders work.
Therefore, in the present invention, apart from the case where the work vehicle is steered by the operator, the mechanism that can largely rotate the steering handle toward the operator only at the time of maintenance or the like is inexpensive in the tilt mechanism of the steering handle. It is a problem to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, in the tilt mechanism that supports the handle column that supports the steering handle provided on the work vehicle so as to be rotatable with respect to the bracket provided on the main unit side, the tilt operation lever is rotatable to the steering handle side. The tilt angle holding mechanism is configured by a locking member provided at the tip of the tilt operation lever and a locked member provided on the machine side that can be locked with the locking member at a plurality of positions. Is.

  According to a second aspect of the present invention, a tilt restricting member is disposed on both sides of the tilt range of the locked member, and a stopper for restricting the rotation range of the tilt operation lever is disposed in the vicinity of the tilt operation lever, and the stopper is released. In this case, the locking member provided on the tilt operation lever is configured to be rotatable outside the tilt regulation range.

  According to a third aspect of the present invention, an arc-shaped long hole centering on the tilt rotation fulcrum shaft of the handle column is formed in the bracket provided on either the machine side or the handle column side, and inserted into the long hole. A restricting body is detachably fixed to a bracket provided on either the main unit side or the handle column side to restrict the change range of the tilt angle.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, regarding the tilt mechanism of the steering handle, the tilt angle holding mechanism includes a tilt operation lever that is rotatably provided on the steering side and a locking plate that is fixed on the frame side. Thus, there is no complicated mechanism, the number of parts can be reduced, and it can be realized economically and inexpensively.

  In claim 2, by restricting the rotation angle of the tilt operation lever by the stopper, the change range of the tilt angle is restricted. For example, during normal operation of the work vehicle, the steering angle is larger than necessary. An appropriate handling position corresponding to each pilot's steering posture can be adjusted in a short time without tilting the steering wheel toward the cockpit.

  In claim 3, by providing the long hole and the regulating body as a lock pin in the vicinity of the tilt fulcrum, the lock pin is slid along the long hole in conjunction with the tilting operation of the steering handle. There is no complicated mechanism, the change range of the tilt angle is regulated with a simple structure, and it can be realized economically and inexpensively. Since the lock pin can be inserted and removed, the operator can easily change the change range of the tilt angle only by attaching and detaching the lock pin.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an overall configuration of a tractor according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the overall configuration of the tilt mechanism of the steering handle that can regulate the rotation range of the tilt operation lever of the present invention.
FIG. 3 is also a side view.
FIG. 4 is a perspective view showing the overall configuration of the steering handle tilt mechanism that restricts the rotation range of the tilt operation lever by the stopper pin.
FIG. 5 is also a plan view.
FIG. 6 is a perspective view showing the vicinity of the tilt fulcrum of the steering handle that restricts the rotation range of the tilt operation lever by a lock pin provided at the tilt fulcrum.
FIG. 7 is a side view showing the structure of the lock pin.
FIG. 8 is a side view (first embodiment) illustrating a sheet storage method according to an embodiment of the present invention.
FIG. 9 is a side view showing a second embodiment of the sheet storage method.
FIG. 10 is a view showing an embodiment in which a stopper is provided on the column cover.

[Overall configuration of tractor 1]
First, an overall configuration of a tractor 1 equipped with a cabin according to an embodiment of the present invention will be described with reference to FIG.
A bonnet 4 is disposed at the front of the main body on which the front wheels 2 and 2 and the rear wheels 3 and 3 are suspended in front and rear, and an engine 5 is built in the bonnet 4. A steering handle 6 is provided behind the bonnet 4, and a seat 7 is provided behind the steering handle 6. Driving units such as the steering handle 6 and the seat (control seat) 7 are covered with a cabin 8.

  The cabin 8 is fixed to the airframe via an elastic member such as a vibration isolating rubber, for example, so that the vibration of the airframe is not easily transmitted to the cabin 8 and the noise in the cabin 8 is reduced. ing. It is configured in a so-called floating structure cabin. A door window 9 is formed on the side of the cabin 8, and a side window 10 is formed behind the door window 9. An air conditioner 12 is provided on the cabin roof 11 of the cabin 8. It is installed inside.

A clutch housing 13 is connected to the rear of the engine 5, and a transmission case 14 is connected to the rear of the clutch housing 13. Power from the engine 5 is transmitted to the rear wheel 3.
Further, the driving force of the engine 5 is transmitted to the power take-off shaft 15 protruding from the rear end of the transmission case 14, and the power take-out shaft (or PTO shaft) 15 is driven to operate the work machine at the rear end of the machine body. The work machine connected to the mounting device 16 is configured to be driven. The front wheels 2 and 2 are mounted on the front axle 26 and can be driven.

[Moving method of sheet 7]
Next, a first embodiment of the movable configuration of the seat 7 of the present invention will be described with reference to FIG. (Note that the direction of arrow A shown in FIG. 8 indicates the direction of travel.)
Conventionally, in the case of maintenance of a hydraulic device or the like located under the seat 7 provided in the cockpit of the tractor 1, the seat 7 is rotated forward about the lower front portion of the seating surface, and the backrest portion is brought into contact with the upper surface of the steering handle 6. The upper plate constituting the seat bracket 39 below the seat 7 is removed, and the upper portion is opened. However, since the seat surface and the backrest portion of the seat 7 are integrally configured, the seat surface of the seat 7 configured in an L shape when viewed from the side is positioned at the front upper side of the open space in a substantially vertical state during maintenance. As a result, the sheet 7 may become an obstacle during work.

Therefore, as shown in FIG. 8, the upper plate of the seat bracket 39 and the seat 7 are configured to be folded and can be stored above the step 44. That is, the seat 7 includes a backrest portion 7a and a seat portion 7b. A rotation support portion 7c is provided between the backrest portion 7a and the seat portion 7b, and the rotation support portion 7c can be fixed at an arbitrary angle. . A front / rear slide mechanism 37 is provided at the lower portion of the seat portion 7b so that the front / rear position can be adjusted according to the body shape of the operator. However, a configuration in which the front / rear slide mechanism 37 is not provided is also possible.
The seat 7 is mounted on a seat bracket 39. The seat bracket 39 is formed in a substantially “h” shape in a side view, and is fixed to the transmission case 14 or the rear axle case, and fenders are provided on both sides of the seat bracket 39. It is attached. An opening 39b for maintenance is formed in a horizontal portion located below the seat 7 of the seat bracket 39, and the opening 39b is configured to be closed by an upper plate 39a.
That is, the upper plate 39a is substantially the same size or slightly larger than the opening 39b, and is rotated in the left-right direction between the front portion of the upper plate 39a and the upper end of the rising portion 39c of the seat bracket 39. A fulcrum shaft 38 is provided and connected so that the upper plate 39a can be rotated forward and upward. The front / rear slide mechanism 37 is fixed on the upper surface of the upper plate 39a.

  In such a configuration, when the seat 7 is folded for maintenance or the like and the upper part of the hydraulic device or the like is opened, the rotation support portion 7c is unlocked and the backrest portion 7a is tilted forward before the rotation fulcrum. By rotating the seat 7 forward about 38, the opening 39b is opened, and the seat 7 is positioned below the horizontal surface of the seat bracket 39 and does not protrude upward. It is possible to easily put a hand into or look into the opening 39b from above, and maintenance and the like can be easily performed.

Next, a second embodiment of the movable configuration of the seat 7 of the present invention will be described with reference to FIG. (The direction of arrow A shown in FIG. 9 indicates the direction of travel.)
In FIG. 9, the seat 7 is provided with a slide mechanism 37 and a rotation mechanism for the backrest portion 7a as in the first embodiment. The seat bracket 40 is configured in substantially the same manner as described above, but the front plate can also be opened. That is, the lower upper plate 40a where the seat 7 of the seat bracket 40 is located and the front plate 40b located in front and lower of the seat bracket 40 are configured to be removable, and the opening 40c is opened so that the upper and front sides of the seat bracket 40 can be opened. Is formed. A front / rear slide mechanism 37 is fixed on the upper plate 40a, and one end of the upper plate 40a and one end of the front plate 40b are connected by a left and right pivot point 40d, and the other end of the front plate 40b is the seat bracket 40. Or a rear portion of step 44 via a rotation fulcrum shaft 40e.

  In such a configuration, when performing maintenance or the like, the upper plate 40a and the front plate 40b are folded and placed on the step 44 by rotating forward about the rotation fulcrum shafts 40d and 40e. The seat 7 is positioned on the seat 7 and the seat 7 can be opened largely by tilting the backrest portion 7a forward with the rotation support portion 7c as the center. The work can be easily performed from above.

[Tilt mechanism of steering handle 6]
Next, a tilt mechanism of the steering handle 6 according to an embodiment of the present invention will be described with reference to FIGS. (The direction of the arrow A shown in FIGS. 2 to 7 indicates the traveling direction.)
The steering handle 6 in the present embodiment is provided with a tilt function that can be tilted by rotating back and forth, and a tilt support portion 21 that supports a rotating portion when the steering handle 6 is tilted, and A holding mechanism 22 that holds the position of the steering handle 6 at an arbitrary tilt angle is provided.

[Tilt support portion 21]
The tilt support portion 21 is inserted into the cylindrical handle column 23 that holds the steering shaft 24 and the like, the mounting bracket 25 fixed to the vehicle body frame of the tractor 1 on the main body side, and the members 23 and 25 so as to rotate. It is composed of pins 27 and 27, etc., which are moving fulcrums.

  The handle column 23 rotatably supports a handle shaft in a cylindrical main body portion 23a, and a steering wheel is fixed to an upper end portion of the handle shaft. An accelerator lever, a forward / reverse switching lever or the like is attached to the upper part of the handle column 23, and a bracket 28 connected to the mounting bracket 25 is fixed to the lower part and covered with a column cover 29.

  The bracket 28 is formed by bending a flat plate member downwardly in a front view, and is bent into a “U” shape. The upper part of each side surface is slightly rearward, that is, toward the cockpit. It extends long and is bent outward. That is, a portion having an “L” shape that is bent outward in plan view is provided at the rear end of the bracket 28. Through holes 28b and 28b are respectively provided at the ends of the “L” -shaped portion, and the column cover 29 is attached by bolts or the like using the through holes 28b.

  Further, through holes 28c and 28c are penetrated on the same line in front portions on both side surfaces of the bracket 28, and are pivotally supported via mounting brackets 25 and pins 27 and 27, which will be described later.

  Note that the "L" -shaped part located at the rear part of the bracket 28 does not need to be formed integrally with the bracket 28 as shown in the present embodiment. It is good also as a structure fixed to the flat plate member bent by the fastening parts, such as a volt | bolt, or horizontal "U" shape by welding. A main body 23a is supported at the center of the upper surface of the bracket 28 via a boss member 23d.

The mounting bracket 25 is disposed outside the bracket 28, that is, the bracket 28 is rotatably supported inside the mounting bracket 25. The mounting bracket 25 is formed by bending a flat plate member into a “U” shape that is opened rearward in the plan view, that is, toward the cockpit.
Similar to the bracket 28, through holes 25 a and 25 a are provided on both sides of the mounting bracket 25 so as to penetrate the coaxial line, and the mounting bracket 25 and the bracket 28 rotate via pins 27 and 27. It is freely pivoted. That is, as described above, the bracket 28 is disposed in the mounting bracket 25 formed in a “U” shape in a plan view so as to enter the inside from the rear opening portion. Since the pins 27 are simultaneously inserted into the through holes 25 a and 28 c provided on both side surfaces of the bracket 28, the bracket 28 is pivotally supported with respect to the mounting bracket 25.
Further, the lower part of both side surfaces of the mounting bracket 25 is fixed to the vehicle body frame via the support member 32.

[Tilt angle holding mechanism 22]
The tilt angle holding mechanism 22 is disposed between the handle column 23 and the mounting bracket 25 on the machine side, and is provided with a locking member provided on the steering handle 6 (handle column 23) side and on the vehicle body frame side. It is comprised by the to-be-latched member to be fixed.

The locking member is constituted by a tilt operation lever 33 having a claw portion, and the tilt operation lever 33 is formed in a letter “L” shape in a plan view, and a substantially flat claw member 33 b is provided at a front tip portion of one end. A grip 36 is provided at the rear end of the other side of the cockpit, and a rotation shaft 33c is horizontally provided in the left-right direction in the middle of the front and rear.
Further, a support stay 35 for supporting the tilt operation lever 33 is provided at a substantially central portion in the upper and lower portions of the handle column 23 so as to protrude rearward, that is, toward the cockpit, and to support the tilt operation lever 33. It is formed in a U-shape as viewed, and through holes 33d are coaxially penetrated on both side surfaces, and both end portions of the rotating shaft 33c are inserted and supported in the through holes 33d. The tilt operating lever 33 is attached to the handle column 23. On the other hand, it is provided to be rotatable up and down.

  Further, the tilt operation lever 33 is urged by an urging means made of an elastic body so that the locking member and the locked member are engaged. In this embodiment, the rotation shaft 33c of the tilt operation lever 33 is One end of the tension spring 41 is hooked at the rear, and the other end of the tension spring 41 is hooked on a stay 23c fixed to the upper part of the handle column 23. Thereby, the tilt operation lever 33 is always urged clockwise around the rotation shaft 33c in the side view, and the claw member 33b provided at the tip of the tilt operation lever 33 is always locked as described later. The plate 34 is biased so as to be engaged with a groove 34a.

  The biasing means for the tilt operation lever 33 is not necessarily limited to the tension spring 41 shown in the present embodiment. For example, the biasing spring 33 or the like is biased by the rotating shaft 33c provided in the tilt operation lever 33. The tilt operation lever 33 may be always urged clockwise in a side view using means.

  The locked member is composed of a locking plate 34 having a plurality of grooves, and the locking plate 34 is formed of a flat plate member as shown in FIG. A plurality of grooves 34a, 34a,... Are provided in the front-rear direction, that is, in the tilt direction at a predetermined interval on the opposite side, that is, on the upper side located below the claw member when the handle column 23 is tilted. .

The plurality of grooves 34a, 34a,... Provided at the upper end of the locking plate 34 are provided in a “comb shape” along the side of the upper end.
In this embodiment, the hooking member and the hooked member are configured by the claw member and the groove portion, but are not limited to this configuration, and may be configured by a pin and a pin hole, a long hole and a knob screw, or the like. Is possible.

  In this way, the tilt angle holding mechanism 22 is configured, and by the rotation operation of the tilt operation lever 33, the engagement state between the claw member 33b and the groove 34a or the open state can be set. And the handle column 23 can be rotated in the opened state.

  And the tilt range control part is formed in the both sides of the to-be-latched part, ie, the outer side of groove part 34a * 34a located in the both ends of said some groove part 34a * 34a .... That is, in order to set the rotation operation range of the handle column 23, the standing portion 34b located on both outer sides of the groove portions 34a and 34a extends upward from the standing portion 34c located on the inner side. Specifically, in FIG. 3, the dimension X of the upright portions 34b at the front and rear end portions provided at the upper end of the locking plate 34 is formed to be somewhat longer than the dimension Y of the other upright portions 34c. ing.

At this time, the vertical rotation range (downward in this embodiment) of the tilt operation lever 33 is restricted by a stopper so that the claw member 33b does not get over the standing portion 34b. That is, in FIGS. 4 and 5, through holes 33f are separately provided on both sides of the support stay 35 on which the tilt operation lever 33 is provided between the pivot shaft 33c and the claw member 33b on the coaxial line. A stopper pin 43 is detachably provided on 33f. Thus, the tilt operation lever 33 is configured to restrict the vertical rotation range, and the stopper pin 43 is positioned above the tilt operation lever 33 and in front of the rotation shaft 33c. Since it is orthogonal to the support portion 33a of the lever 33, it does not rotate significantly upward.
In addition, a stopper may be provided below the lever guide hole 29a of the column cover 29 in order to restrict the claw member 33b from getting over the standing portion 34b. That is, as shown in FIG. 10, a lever guide hole 29a is provided on the rear surface of the column cover 29 to guide the tilt operation lever 33 so as to be pivotable up and down, and is detachable or pivotable below the lever guide hole 29a. A stopper plate 45 is provided so as to restrict the downward rotation of the tilt operation lever 33.

  With this configuration, when the rotation angle of the tilt operation lever 33 is within the set range, the claw member 33b comes out from the groove 34a, and the standing portions 34b and 34b provided at the front and rear ends of the locking plate 34 described above. The steering handle 6 can be tilted within the range, and the angle can be maintained by engaging the claw member 33b with the groove 34a at a desired position within the range.

  Then, by releasing the stopper plate 45 and pivoting the tilt operation lever 33 downward greatly, the claw member 33b can get over the upright portion 34b, and the handle column 23 can be tilted backward. The front part of the board can be opened widely, and maintenance of equipment arranged in the front part of the dashboard, for example, the wiring to the fuel tank and the display panel can be easily performed without removing the column cover 29 or the dashboard cover. become able to. Further, when the claw member 33b gets over the upright portion 34b and pivots the handle column 23 to the front, the backrest portion 7a of the seat 7 is not folded and the upper end of the backrest portion 7a is rotated largely until it hits the step 44. Therefore, the maintenance of the hydraulic equipment and the like disposed below the seat 7 can be facilitated.

  The tilt range restricting portion can be formed on the mounting bracket 25. That is, in FIG. 6, an arc-shaped long hole 25 b centering on the through hole 25 a is provided in the vicinity of the through hole 25 a on one side surface portion of the mounting bracket 25, and the lock pin 30 inserted into the bracket 28 is By sliding along the long hole 25b, the rotation angle of the handle column with respect to the mounting bracket 25, that is, the change range of the tilt angle is regulated.

[Lock pin 30]
Here, as shown in FIG. 7, the lock pin 30 is a round bar member provided with a stepped portion 30 a at a substantially central portion, and an inclined portion is provided at one end portion, and is inserted into the bracket 28. A handle 30b is provided at the end on the opposite side. The handle 30b is formed by bending a very thin round bar member into a "U" shape.

  The stepped portion 30 a functions as positioning when the lock pin 30 is inserted into the bracket 28 through the long hole 25 b of the mounting bracket 25. That is, in FIG. 7, the width of the through hole 28b provided in one side surface portion of the bracket 28 and the long hole 25b provided in the mounting bracket 25 is formed smaller than the outer diameter of the stepped portion 30a. Therefore, the stepped portion 30a is brought into contact with the side surface of the mounting bracket 25 and is regulated in position, and the lock pin 30 is not inserted more than a certain length.

  Further, a through hole 30d is provided at the tip of the lock pin 30 on the opposite side to the stepped portion 30a, and a through hole 30d is provided perpendicular to the axis of the lock pin 30, and a retaining pin 31 is inserted into the through hole 30d. By doing so, the lock pin 30 is prevented from falling off after being inserted into the bracket 28. Note that through holes are provided at both ends of the retaining pin 31, and the retaining pin 31 is prevented from falling off by a split pin or the like.

With this configuration, as long as the lock pin 30 is slid along the long hole 25b, the tilt angle of the steering handle is restricted, and when the lock pin 30 is removed from the bracket 28, the tilt angle is regulated. And the steering handle can be tilted back and forth greatly.
That is, by removing the lock pin 30 from the bracket 28 and tilting the handle column 23 rearward, the dashboard front part can be largely opened, and the dashboard front can be removed without removing the column cover or dashboard cover. Maintenance of equipment arranged in the unit, for example, wiring to a fuel tank or a display panel can be easily performed. Further, when the handle column 32 is largely rotated forward, it can be largely rotated until the upper end of the backrest portion hits the step 44 without folding the backrest portion of the seat 7 and is disposed below the seat 7. Maintenance of the hydraulic equipment to be performed can be facilitated.

  As a result, when the operator adjusts the tilt angle of the steering handle 6 while operating the tractor 1, there is no fear that the steering handle 6 will be greatly tilted by carelessness. By detaching and tilting the steering handle 6 greatly toward the cockpit, the side of the dashboard facing the front of the steering handle 6 is exposed, and maintenance, cleaning, etc. relating to the wiring of the equipment can be easily performed. it can.

The side view which showed the whole structure of the tractor based on one Example of this invention. The perspective view which showed the whole structure of the tilt mechanism of the steering handle which can regulate the rotation range of the tilt operation lever of this invention. Similarly, side view. The perspective view which showed the whole structure of the tilt mechanism of a steering handle which regulates the rotation range of a tilt operation lever with a stopper pin. Similarly, a plan view. The perspective view which showed the vicinity of the tilt fulcrum of a steering handle which controls the rotation range of a tilt operation lever with the lock pin provided in the tilt fulcrum. The side view which showed the structure of the lock pin. The side view which showed the storage method of the sheet | seat based on one Example of this invention (1st Example). Similarly, the side view which showed the 2nd Example of the storage method of a sheet | seat. The figure which shows the Example which provided the stopper in the column cover.

Explanation of symbols

6 Steering handle 21 Tilt support portion 22 Holding mechanism 23 Handle column 23a Main body portion 23c Stay 23d Boss material 24 Steering shaft 25 Mounting bracket 25a Through hole 27 Pin 28 Bracket 28b Through hole 28c Through hole 29 Column cover 29a Lever guide hole 33 Tilt operation Lever 33a Support portion 33b Claw member 33c Rotating shaft 33d Through hole 34 Locking plate 34a Groove portion 35 Support stay 36 Grip 41 Tension spring

Claims (3)

  In a tilt mechanism that rotatably supports a handle column that supports a steering handle provided on a work vehicle with respect to a bracket provided on the side of the machine, a tilt operating lever is provided on the steering handle so as to be rotatable. A steering handle characterized in that a tilt angle holding mechanism is constituted by a locking member provided at a tip end and a locked member provided on the machine side that can be locked at a plurality of positions with the locking member. Tilt mechanism.   A tilt restricting member is disposed on both sides of the tilt range of the locked member, and a stopper for restricting the rotation range of the tilt operation lever is disposed in the vicinity of the tilt operation lever, and the tilt operation is performed when the stopper is released. 2. The steering handle tilt mechanism according to claim 1, wherein a locking member provided on the lever is configured to be rotatable outside a tilt restriction range. A bracket provided on either the machine side or the handle column side is formed with an arc-shaped long hole centering on the tilt rotation fulcrum shaft of the handle column, and a restricting body inserted into the long hole is provided in the machine body. The steering handle tilt mechanism is characterized in that it is detachably fixed to a bracket provided on either the side or the handle column side and restricts a change range of the tilt angle.

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