JP2006347301A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance easiness of getting on/off a working vehicle by preventing a filling auxiliary frame from unexpectedly turning during getting on/off, in making the filling auxiliary frame function as a getting on/off grip. <P>SOLUTION: This tractor, turning the filling auxiliary frame 10 into a horizontal posture and a vertical posture, in making the filling auxiliary frame 10 permitting a fuel supply tank to be placed function as the getting on/off grip, includes a posture holding mechanism for holding the filling auxiliary frame 10 in respective postures. The posture holding mechanism releases posture holding of the filling auxiliary frame 10 by pressing the filling auxiliary frame 10 toward the internal tractor body along its rotational center line. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a work vehicle such as a tractor, and more particularly to a work vehicle in which a fueling auxiliary frame on which a fuel supply tank can be placed also functions as a grip for getting on and off.

  In general, in a work vehicle such as a tractor, when refueling a fuel tank, a fuel replenishing tank such as a poly tank is placed near the refueling port, and fuel is supplied using a manual or electric pump. However, in a work vehicle that has a fuel filler opening in the upper part of the fuselage (for example, the upper part of the bonnet) and where the fuel replenishment tank is not secured, the fuel supply tank is placed on the upper part of the fuselage for refueling. Therefore, not only is it difficult to stably support the fuel supply tank, but there is also a disadvantage that the bonnet or the like is damaged.

In view of this, it has been proposed to provide a fuel supply auxiliary frame in which a fuel supply tank can be placed in the vicinity of the fuel supply port (see, for example, Patent Document 1). With such a configuration, since the fuel supply tank can be stably supported during refueling, not only the workability during refueling is improved, but also the inconvenience of damaging the bonnet or the like can be avoided.
Japanese Utility Model Publication No. 61-3123

  By the way, in order to function as a foot cover, the auxiliary fuel supply frame shown in Patent Document 1 is configured to be able to rotate and change between a horizontal posture and a vertical posture, and is always in a vertical posture by a posture holding mechanism. Is supposed to be retained. However, since the posture holding mechanism disclosed in Patent Document 1 is configured to release the posture holding of the auxiliary fuel supply frame by pulling a grip-like stopper outward from the fuselage, the operator misidentifies it as a grip for getting on and off. Then, there is a possibility that the stopper is pulled and the auxiliary oil supply frame rotates unexpectedly.

The present invention was created for the purpose of solving these problems in view of the above-described circumstances, and when the fuel supply auxiliary frame on which the fuel supply tank can be placed functions also as a grip for getting on and off, A work vehicle for turning the refueling auxiliary frame to a horizontal posture and a vertical posture, the work vehicle including a posture holding mechanism that holds the refueling auxiliary frame in each of the postures. The posture retention of the fueling auxiliary frame is released by pressing the frame along the rotation axis toward the inner side of the machine body. If it does in this way, when functioning also as a grip for boarding / alighting, the fueling auxiliary frame can be prevented from rotating unexpectedly at the time of getting on / off, and the boarding / exiting performance of the work vehicle can be improved.
In addition, the posture holding mechanism holds the posture of the auxiliary fuel supply frame by inserting an engagement pin into the engagement hole, and the engagement pin abuts on a peripheral portion of the engagement hole. And having a taper portion for removing the auxiliary oil supply frame and a non-taper small-diameter shaft portion formed on the tip side of the taper portion. In this way, when the oil supply auxiliary frame is loosened by the taper portion, even if the engagement pin is guided in the removal direction by the taper portion, the non-taper small-diameter shaft portion restricts the engagement pin from coming off, thereby assisting in oil supply. Unintentional rotation of the frame can be prevented.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling body of a tractor. An engine mounting portion 2 is formed at the front of the traveling body 1, and an operation portion 3 that is an operator's boarding space is formed behind the engine mounting portion 2. Yes.

  The engine mounting portion 2 includes an engine room (not shown) in which an engine (not shown) and the like are arranged, a front grill 4 that covers the front part of the engine room, and a side cover 5 that covers both the left and right sides of the engine room. And an openable / closable bonnet 6 covering the upper part of the engine room.

  As shown in FIGS. 2 to 4, a fuel tank arrangement chamber (not shown) partitioned by a partition wall 7 is formed at the rear end of the engine room, and a fuel tank 8 is arranged here. The fuel tank 8 has a fuel filler port (cap) 8a in the upper part, and fuel is supplied from here. The partition wall 7 is composed of a front-view-type partition frame 7a supported by a body frame (not shown) and a partition plate 7b provided inside the partition frame 7a.

  Steps 9 for getting on and off are provided on both the left and right sides of the operation unit 3. The operator uses the step 9 for getting on and off to step on and off the aircraft. The front end of the boarding / alighting step 9 is formed so as to rise upward, and is fixed to a bracket 7c protruding from the partition frame 7a.

  The traveling machine body 1 includes a fueling auxiliary frame 10 in the vicinity of the fuel filler opening 8a and in the vicinity of the step 9 for getting on and off. The refueling auxiliary frame 10 is provided for placing a fuel replenishment tank when refueling the fuel tank 8. However, the refueling auxiliary frame 10 according to the present invention is from a lateral position (tank mounting position). When turned to a vertical orientation (grip orientation), it also functions as a grip for getting on and off to assist getting on and off the aircraft. Will be described in detail.

  As shown in FIG. 5 to FIG. 7, the refueling auxiliary frame 10 itself integrally includes a rotation shaft 10 a that faces in the left-right direction and an auxiliary frame member 10 b that is provided at the tip of the rotation shaft 10 a. By rotating about the shaft 10a, the auxiliary frame member 10b is changed into a vertical posture and a horizontal posture. And the auxiliary | assistant frame member 10b is comprised using a U-shaped pipe material, for example so that it may function as a grip for getting on and off when it is a vertical posture, and it may function as an oil supply auxiliary | assistant frame when it is a horizontal posture.

  The rotation support portion of the fuel supply auxiliary frame 10 is configured using a base 11, a boss 12, and a bullet machine 13. The base 11 is a plate member fixed inside the partition frame 7a, and is integrally provided with a boss 12. The boss 12 is a cylindrical member that rotatably supports the rotation shaft 10a of the auxiliary fuel supply frame 10, and also allows left and right sliding of the rotation shaft 10a. The ammunition machine 13 is a compression coil spring interposed between the stepped portion formed on the rotating shaft 10a and the outer end surface of the boss 12, and urges the oil supply auxiliary frame 10 toward the outside of the machine body.

  The posture holding mechanism of the auxiliary fuel supply frame 10 is configured between the base 11 and the arm 14. The arm 14 is a plate member that is integrally fixed to the proximal end portion of the rotating shaft 10a, and an engagement pin 15 that protrudes toward the outside of the machine body is provided at the distal end portion thereof. The engagement pins 15 are selectively inserted from the inside of the machine body into the two engagement holes 11a formed in the base 11, thereby positioning and maintaining the posture of the auxiliary fuel supply frame 10. Further, when releasing the posture maintenance of the fuel supply auxiliary frame 10, the oil supply auxiliary frame 10 is pressed toward the inner side of the machine body along the rotation axis against the urging force of the bullet machine 13. In this way, when the auxiliary fuel supply frame 10 functions also as a grip for getting on and off, it is possible to prevent the auxiliary oil supply frame 10 from rotating unexpectedly even if a tensile force is applied at the time of getting on and off.

  In the present embodiment, a tapered portion 15 a having a smaller diameter toward the distal end side is formed at the distal end portion of the engagement pin 15. When the engagement pin 15 engages with the engagement hole 11a, the taper portion 15a abuts on the peripheral edge of the engagement hole 11a to remove the backlash of the oil supply auxiliary frame 10. As a result, the refueling auxiliary frame 10 can be maintained in a posture without play and the usability as a grip for getting on and off can be enhanced.

  In the present embodiment, when the tapered portion 15a is formed at the distal end portion of the engagement pin 15, the non-tapered small-diameter shaft portion 15b is projected from the distal end side of the tapered portion 15a. In this way, when the auxiliary lubrication frame 10 is loosened by the tapered portion 15a, the non-tapered small-diameter shaft portion 15b is the peripheral edge of the engaging hole 11a even if the engaging pin 15 is guided in the removal direction by the tapered portion 15a. Since the engagement pin 15 is prevented from coming off by engaging with the, the unintended rotation of the auxiliary fuel supply frame 10 can be prevented.

  Next, the usage method of the fueling auxiliary | assistant frame 10 is demonstrated with reference to FIGS. The refueling auxiliary frame 10 is normally held in a vertical posture and used as a grip for getting on and off. At this time, the posture of the auxiliary oil supply frame 10 is maintained by the engagement pin 15 engaging with the engagement hole 11a of the base 11 from the inside of the machine body by the urging force of the bullet machine 13, so that the operator can supply oil when getting on and off. Even if the auxiliary frame 10 is used as a grip, the posture holding is not released by the tensile force.

  When the fuel supply tank is placed on the fuel supply auxiliary frame 10, first, the fuel supply auxiliary frame 10 in the vertical orientation is pressed toward the inner side of the machine body along the rotation axis. Then, the engagement pin 15 comes out of the engagement hole 11a and the rotation of the oil supply auxiliary frame 10 is allowed. Therefore, the oil supply auxiliary frame 10 is operated to rotate by approximately 90 °, and the engagement pin 15 is moved to the other engagement hole. Engage with 11a. As a result, the refueling auxiliary frame 10 is held in the horizontal orientation, and the fuel supply tank can be placed.

  According to the present embodiment configured as described, when the fuel supply auxiliary frame 10 on which the fuel supply tank can be placed also functions as a grip for getting on and off, the fuel supply auxiliary frame 10 is set to a horizontal posture and a vertical posture. A tractor that turns and includes a posture holding mechanism that holds the refueling auxiliary frame 10 in each posture, and the posture holding mechanism moves the refueling auxiliary frame 10 along the rotation axis toward the inside of the body. By pressing, the holding of the auxiliary fuel frame 10 is released, so that even if the auxiliary oil frame 10 functions as a grip for getting on and off, the auxiliary oil frame 10 is prevented from rotating unexpectedly at the time of getting on and off. Entry / exit can be improved.

  Further, the posture holding mechanism of the fuel supply auxiliary frame 10 holds the posture of the fuel supply auxiliary frame 10 by inserting the engagement pin 15 into the engagement hole 11a, and the engagement pin 15 is connected to the engagement hole 11a. Since there is a taper portion 15a that abuts on the peripheral edge portion of the oil supply auxiliary frame 10 to remove the looseness of the oil supply auxiliary frame 10 and a non-tapered small-diameter shaft portion 15b that is formed on the tip side of the taper portion 15a, oil supply assistance is provided by the taper portion 15a. Even when the engagement pin 15 is guided in the removal direction by the taper portion 15a in removing the play of the frame 10, the non-taper small diameter shaft portion 15b regulates the removal of the engagement pin 15, and the refueling auxiliary frame 10 is not intended. Rotation can be prevented.

It is a perspective view of a tractor which omitted a front wheel. It is a front view which shows a partition wall and an oil supply auxiliary | assistant frame. It is the perspective view which looked at the partition wall and the fueling auxiliary frame from the right front. It is the perspective view which looked at the partition wall and the fueling auxiliary frame from the left front. It is a perspective view which shows the rotation support structure and attitude | position holding mechanism of an oil supply auxiliary | assistant frame. It is a perspective view of a fueling auxiliary frame. It is a side view which shows an arm and an engagement pin. It is an external appearance perspective view which shows the fueling auxiliary | assistant frame of a vertical orientation. It is an inside perspective view which shows the fueling auxiliary | assistant frame of a vertical orientation. It is an external appearance perspective view which shows the fueling auxiliary | assistant frame of a horizontal orientation. It is an inside perspective view which shows the fueling auxiliary | assistant frame of a horizontal orientation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 8 Fuel tank 8a Refueling port 10 Refueling auxiliary frame 10a Rotating shaft 10b Auxiliary frame member 11 Base 11a Engagement hole 12 Boss 13 Arm 14 Engagement pin 15a Tapered part 15b Non-tapered small diameter shaft part

Claims (2)

In order to make the refueling auxiliary frame on which the fuel replenishment tank can be placed also function as a grip for getting on and off, a work vehicle that turns the refueling auxiliary frame into a horizontal posture and a vertical posture,
A posture holding mechanism for holding the oil supply auxiliary frame in each of the postures, and the posture holding mechanism presses the oil supply auxiliary frame toward the inner side of the machine body along its rotation axis, thereby providing the oil supply auxiliary frame. A work vehicle characterized in that the posture holding is released.   The posture holding mechanism holds the posture of the oil supply auxiliary frame by inserting an engagement pin into the engagement hole, and the engagement pin abuts on a peripheral portion of the engagement hole. The work vehicle according to claim 1, further comprising: a taper portion that removes play of the auxiliary oil supply frame, and a non-taper small-diameter shaft portion that is formed on the front end side of the taper portion.

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