JP2004306640A - Interference preventive mechanism at the time of tilting cab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly prevent a front lid from contacting with another member of a vehicle near the lid when a cab tilts, with a comparatively simple structure. <P>SOLUTION: On a front surface of the cab 13, the front lid 19 is provided so as to spring. A tilting pump 28 supplies and discharges pressure oil to a tilting cylinder for tilting the cab, and is provided with a switching lever 29 for switching supplying and discharging of the pressure oil. A switching cover 36 blocks a switching operation hole 34a opposed to the switching lever and provided on a member 34 covering an outside surface of a chassis frame 14 so as to open. A first locking means 31 locks the front lid in a blocking state, and a second locking means 32 locks the switching cover in a blocking state. A first lever 15 for releasing the first locking means is provided in the cab, and the second lever 52 for releasing the second locking means is provided in the lid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mechanism for preventing a front lid or the like from interfering with other members of a vehicle adjacent to the lid when tilting a cab of the vehicle.
[0002]
[Prior art]
Conventionally, a bumper cover covering a gap between an upper flange of a front bumper and a front grill is pivotally mounted inside the front bumper, a rising portion is formed at a rear edge of the bumper cover, and the bumper cover is rotated downward. The front bumper cover device of the vehicle is provided with a return spring biased between the bumper cover and the frame, and a lever that rotates downward in conjunction with the tilt of the cab and is provided in contact with the lower surface of the bumper cover. It is known (for example, see Patent Document 1).
[0003]
In the front bumper cover device for a vehicle configured as described above, the gap between the front bumper and the front grill is closed by the bumper cover, so that the running wind does not enter this gap, and the air resistance can be reduced. Appearance can be improved. When the bumper cover is tilted, the lever rotates downward in conjunction with the tilt, so that the bumper cover rotates downward by the elastic force of the return spring. As a result, it is possible to prevent the bumper cover from interfering with the front grill.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 64-52844
[Problems to be solved by the invention]
In a truck having a cab that can be tilted, when the engine is moved forward to increase the load capacity, the tilt center of the cab, the radiator or the intercooler, etc. also need to be moved forward.
However, in the vehicle front bumper cover device disclosed in Patent Document 1, when the cab tilt center, the radiator or the intercooler is moved forward, the front grill contacts the bumper, the radiator and the like when the cab is tilted. There was a fear.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an interference prevention mechanism at the time of cab tilt, which can reliably prevent the front lid from contacting other members of the vehicle near the lid when the cab is tilted with a relatively simple configuration. It is in.
[0006]
[Means for Solving the Problems]
As shown in FIGS. 1 to 3, the invention according to claim 1 includes a cab 13 mounted on a chassis frame 14 so as to be tiltable, a front lid 19 provided on a front surface of the cab 13 so as to be able to jump up, A tilt pump 28 provided with a switching lever 29 for supplying and discharging pressure oil to a tilt cylinder 26 for tilting the cab 13 and switching the supply and discharge of the pressure oil, and a tilting pump 28 opposed to the switching lever 29 and The switching lid 36 for opening and closing the switching operation hole 34a formed in the member 34 covering the outer side surface, the first locking means 31 for locking the front lid 19 in a closed state, and the switching lid 36 closed. A second locking means 32 for locking in the state, a first lever 51 provided in the cab 13 for releasing the first locking means 31, and a second lever provided in the front lid 19. Tsu is the interference prevention mechanism during Kyabuchiruto that includes a second lever 52 for releasing the click means 32.
[0007]
In the cab tilt interference prevention mechanism according to the first aspect, the first locking means 31 is released by first operating the first lever 51 in the cab 13, and the front lid 19 is flipped up by hand. Next, by operating the second lever 52 in the front lid 19, the second locking means 32 is released and the switching cover 36 is opened. Further, a hand is inserted through the switching operation hole 34a to operate the switching lever 29 of the tilt pump 28, and the tilt cylinder 26 is driven by the tilt pump 28 to tilt the cab 13. At this time, since the front lid 19 is in a state of being flipped up, the front lid 19 does not contact other members of the vehicle close to the lid 19.
The member 34 that covers the outer side surface of the chassis frame 14 is a step cover, and it is preferable that the step cover 34 be provided with a switching operation hole 34a.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 2 and 3, the cab 13 of the cab-over type truck 10 is mounted on the chassis frame 14 so as to be tiltable. Specifically, the cab 13 has its front lower surface mounted on a pair of side members 14a of the chassis frame 14 via a pair of first air springs 11, and its rear lower surface connected to the second air spring 12 and the floating bar 16. It is placed on the side member 14a through the intermediary. The cab 13 has a lower front end pivotally supported by the front ends of a pair of side members 14a via hinge pins 17 so that the cab 13 can be tilted about the hinge pins 17. Further, a concave portion 13a for accommodating an engine accessory (not shown) such as a reservoir tank for engine cooling water is formed on the front surface of the cab 13, and the concave portion 13a is releasably closed by a front lid 19 (FIG. 1, FIGS. 4 and 5). The front lid 19 is attached to the cab 13 via a pair of hinges 19a, 19a (FIGS. 2, 3 and 5) so as to be able to jump up. Reference numeral 20 in FIGS. 1 to 5 denotes a front bumper attached to the front end of the chassis frame 14 and extending in the vehicle width direction along the lower edge of the front end of the cab 13.
[0009]
On the other hand, a pair of lower brackets 18 that protrude upward are fixed to the front ends of the pair of side members 14a (FIGS. 2 and 3). The front ends of a pair of link levers 21 fixed to both ends of a torque tube (not shown) are fitted into upper ends of these lower brackets 18, respectively, and a pair of hinge pins 17 are inserted.
[0010]
A pair of cab frames 13b extending in the traveling direction of the truck 10 are fixed to the bottom surface of the floor panel 13d of the cab 13, and the bottom surface of the pair of cab frames 13b opposed to the pair of link levers 21 is substantially T-shaped. A pair of U-shaped upper brackets 22 are respectively fixed. The lower end of the upper bracket 22 is rotatably attached to the other end of the link lever 21. A pair of pins 23 are provided at the front end of the upper bracket 22 so as to extend in the vehicle width direction. The pins 23 and the hinge pins 17 are connected by a shock absorber 24. The first air spring 11 is mounted between the upper surface of the link lever 21 and the lower surface of the front end of the upper bracket 22.
[0011]
Near the rear end of the upper bracket 22, a tip of a plunger 26a of a tilt cylinder 26 having a base end pivotally attached to the side member 14a is pivotally attached. An upper end of a tilt stopper 27 capable of holding the cab 13 at a predetermined angle when the cab 13 is tilted is pivotally connected to the rear end of the upper bracket 22. The tilt stopper 27 is urged by a spring (not shown) along the tilt cylinder 26.
[0012]
A tilt pump 28 (FIGS. 1 to 3) for supplying and discharging pressure oil to and from the cylinder 26 is connected to the tilt cylinder 26, and the tilt pump 28 is driven by an electric motor (not shown). . The tilt pump 28 is mounted near the front end of the side member 14a, and the tilt pump 28 is provided with a switching lever 29 for manually switching the supply and discharge of the pressure oil. Further, a step 33 for getting on and off the cab 13 and preventing the side member 14a and the like from being seen around the step 33 are provided on the outer surface near the front end of the side member 14a. A covering step cover 34 made of plastic is attached. A switching operation hole 34a is formed in the step cover 34 so as to face the switching lever 29. The switching operation hole 34a is openably closed by a plastic switching cover 36.
[0013]
Further, a first locking means 31 for locking the front lid 19 in a closed state is provided between the lower end of the front lid 19 and the lower edge of the recess 13a on the front surface of the cab 13 (FIG. 1). Further, a first lever 51 connected to the first locking means 31 via a first wire 41 is provided below the instrument panel 13 c in the driver's seat of the cab 13. By operating the first lever 51, the first lock means 31 can be released. On the other hand, between the upper end of the switching lid 36 and the upper edge of the switching operation hole 34a, there is provided a second locking means 32 for locking the switching lid 36 in a closed state. A second lever 52 connected to the second locking means 32 via a second wire 42 is provided in the recess 13 a on the front surface of the cab 13. By operating the second lever 52, the second lock means 52 can be released.
[0014]
Further, a pair of side members 14a facing the rear end of the cab 13 is provided with a rear arch 37 formed in a substantially inverted U-shape (FIGS. 2 and 3). A pair of rear brackets 38 are fixed to both side edges of the rear arch 37 so as to face the pair of cab frames 13b. The floating bar 16 formed in a substantially hat shape is attached to the pair of rear brackets 38 via the pair of second air springs 12. Reference numeral 39 in FIGS. 2 and 3 is an intercooler for cooling intake air compressed by the turbocharger, and reference numeral 40 is a radiator for cooling engine cooling water.
[0015]
A procedure for tilting the cab 13 of the truck 10 configured as described above will be described.
First, by operating the first lever 51 provided on the driver's seat of the cab 13, the first locking means 31 of the front lid 19 is released, and the front lid 19 is jumped up by hand. Next, by operating the second lever 52 provided in the front lid 19, the second locking means 32 is released and the switching lid 36 is opened. Further, a hand is inserted through the switching operation hole 34a to operate the switching lever 29 of the tilt pump 28, and the tilt cylinder 26 is driven by the tilt pump 28 to tilt the cab 13. At this time, since the front lid 19 is in a state of being lifted up, the cab 13 can be smoothly tilted without the front lid 19 coming into contact with the front bumper 20, the intercooler 39, the radiator 40 and the like. That is, since the cab 13 cannot be tilted unless the front lid 19 is flipped up, it is possible to reliably prevent the front lid 19 from contacting the front bumper 20, the radiator 40, and the like when the cab 13 is tilted.
[0016]
Further, since the switching operation hole 34a is provided in the plastic step cover 34 and the switching operation hole 34a is closed by the plastic switching cover 36, the setting of the switching operation hole 34a and the production of the switching lid 36 are relatively easy. It can be easily performed, and the appearance of the truck 10 is hardly impaired.
In this embodiment, the step cover is used as a member for covering the outer surface of the chassis frame, but a front bumper or the like may be used.
[0017]
【The invention's effect】
As described above, according to the present invention, the tilt pump is provided with the switching lever for switching the supply and discharge of the pressure oil to and from the tilt cylinder, and the member that faces the switching lever and covers the outer surface of the chassis frame. The switching operation hole provided in the switch lid is releasably closed by the switching lid, a first lever for releasing the first locking means of the front lid is provided in the cab, and the second locking means of the switching lid is released. Is provided in the front lid, so that the first locking means is released by the first lever and the front lid is jumped up, and then the second locking means is released by the second lever and the switching lid is opened. The switch lever of the tilt pump cannot be operated unless the switch is opened. That is, since the cab cannot be tilted unless the front lid is flipped up, it is possible to reliably prevent the front lid from contacting other members of the vehicle, such as a front bumper and a radiator, which are close to the lid when the cab is tilted.
[Brief description of the drawings]
FIG. 1 is a side view of a cab showing an interference prevention mechanism at the time of cab tilt according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG. 4;
FIG. 3 is a sectional view corresponding to FIG. 2 and showing a state in which the cab is tilted.
FIG. 4 is a perspective view of the cab showing a state where a front lid is closed.
FIG. 5 is a perspective view of the cab showing a state where a front lid is opened.
[Explanation of symbols]
10 Cab-over type truck (vehicle)
13 Cab 14 Chassis frame 19 Front lid 26 Tilt cylinder 28 Tilt pump 29 Switching lever 31 First locking means 32 Second locking means 34 Step cover 34a Switching operation hole 36 Switching lid 51 First lever 52 Second lever

Claims (2)

A cab (13) mounted tiltably on the chassis frame (14),
A front lid (19) provided so as to be able to jump up in front of the cab (13);
A tilt pump (28) provided with a switching lever (29) for supplying and discharging pressure oil to a tilt cylinder (26) for tilting the cab (13) and switching the supply and discharge of the pressure oil;
A switching lid (36) for opening and closing a switching operation hole (34a) formed in a member (34) facing the switching lever (29) and covering an outer surface of the chassis frame (14);
First locking means (31) for locking the front lid (19) in a closed state;
Second locking means (32) for locking the switching lid (36) in a closed state;
A first lever (51) provided in the cab (13) for releasing the first locking means (31);
An interference prevention mechanism at the time of cab tilt, comprising a second lever (52) provided in the front lid (19) for releasing the second locking means (32). The mechanism for preventing interference during cab tilting according to claim 1, wherein the member (34) for covering the outer side surface of the chassis frame (14) is a step cover, and the step cover (34) is formed with a switching operation hole (34a).

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