JP2585436Y2 - Hinge device for tilt cab type vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device for connecting a cab to a vehicle body side in a tilt cab type vehicle so that the cab can be bent.

[0002]

2. Description of the Related Art In general, in a tilt cab type vehicle, a cab arranged above an engine can be moved up and down with respect to a vehicle body by a hinge device. The cab is raised to perform engine maintenance. Is pivoted down to be connected to the vehicle body.

In the hinge device, a bearing pipe is fixed in the width direction to one of the inner ends of arms each having a U-shaped cross section, the outer end of which is attached to the vehicle body and the cab, respectively. The cab-side arm is connected to the body-side arm in a bendable manner by inserting a connection shaft into the arm. A bearing pipe is also fixed in the width direction to the outer end side of the arm connecting the vehicle body side and the cab side, and the vehicle body side and the cab side are connected by inserting a connecting shaft into this bearing pipe.

[0004]

FIG. 7 is a perspective explanatory view showing a peripheral portion of a bearing pipe of a hinge device of a conventional tilt cab type vehicle, in which a bearing pipe 2 is provided on an inner end side 1a of one of arms 1 in a width direction. Are fixed by welding means such as welding. However, in the above hinge device, the strength of the peripheral portion to which the bearing pipe 2 is fixed is low, and when a tensile load is applied, the hinge device may be broken as shown in FIG.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the invention is to provide a hinge device for a tilt cab type vehicle capable of improving the strength of an arm around a bearing pipe. To provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a cab-side arm and a vehicle-side arm each having a U-shaped cross section, the outer end of which is attached to the vehicle body and the cab. A hinge device for a tilt cab type vehicle, in which a bearing pipe is fixed in a width direction to one of the inner ends and a connecting shaft is inserted into the bearing pipe so that the vehicle body side and the cab side can be bent. A reinforcing tongue is formed at the end of the arm on the bearing pipe mounting side , and the reinforcing tongue is
Abut the outer surface of the bearing pipe and weld this abutment
It is characterized by being integrally fixed.

[0007]

[Action] A reinforcing tongue piece is attached to the end of the arm on the bearing pipe mounting side.
The reinforcing tongue is formed to protrude and abuts against the outer surface of the bearing pipe.
However, since the contact portions are integrally fixed by welding , the strength of the peripheral portion of the bearing pipe can be greatly increased. Thereby, it is possible to sufficiently cope with the tensile load applied to the peripheral portion of the bearing pipe, to prevent breakage of the peripheral portion of the bearing pipe, and to improve the durability of the hinge device.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 is a perspective view of a hinge device for a tilt cab type vehicle according to a first embodiment of the present invention, FIG. 2 is a perspective view of a bearing pipe mounting side arm, and FIG. 3 is mounted with the hinge device of the present invention. FIG. 2 is a schematic front explanatory view showing a part of the tilt cab type vehicle.

In the figure, E denotes a hinge device of a tilt cab type vehicle, and arms U, C having a U-shaped cross section for attaching outer end sides 10a, 20a to a vehicle body side and a cab side, respectively.
, For example, the inner end side 2 of the cab-side arm 20.
0b, a bearing pipe 30 is fixed in the width direction, and a connecting shaft 31 is inserted into the bearing pipe 30 to connect the vehicle body side and the cab side in a bendable manner.

The present invention is characterized in that the bearing pipe mounting end 21 of the arm 20 is fixed to the bearing pipe 30.

Next, the structure of the first embodiment of the present invention will be described in more detail.

As shown in FIG. 3, the cab 40 is connected to a chassis frame 41 on the vehicle body side by a hinge device E, and a lower portion thereof is pivotally supported so as to be able to ascend and descend so that a rear portion of the cab 40 is pivoted around a pivot 42. I have.

The hinge device E includes arms 10 and 20 on the vehicle body side and cab side, and a lock mechanism 50. The vehicle body side arm 10 is formed in a U-shaped cross section and its outer end side 10a
Are rotatably supported on a bracket 43 fixed to the chassis frame 41 by a support shaft 44. Arm 1
An inclined surface 10c that gradually decreases toward the outer end side 10a is formed on the end face of the inner end side 10b.

The cab-side arm 20 is formed in a U-shape in cross section, and has its outer end 20a pivotally supported by a support shaft 46 on a bracket 45 fixed to the cab 40. The inner end side 20b of the arm 20 is fitted into the inner end side 10b of the vehicle body side arm 10, and the bearing pipe 30 is fixed to the inner end side 20b of the arm 20 in the width direction.
Then, the connecting shaft 31 is inserted into the bearing pipe 30, and E-rings 32 are attached to both ends of the connecting shaft 31 protruding from the arm 10.
(Only one is shown) is press-fitted so as to restrict movement in the axial direction. Thus, the cab-side arm 20 is connected to the vehicle-body-side arm 10 so as to be able to bend around the connection shaft 31.

On the inner end side 20b of the arm 20, there is formed a reinforcing tongue 21 which protrudes from the rear side and is a bearing pipe mounting side end. The reinforcing tongue 21 is attached to the outer surface of the bearing pipe 30. , And the contact portion is integrally fixed by welding.

The lock mechanism 50 is mounted on the cab side arm 20 and includes a lock plate 51 integrally provided with an operation lever 52. The lock plate 51 is rotatably supported by a mounting shaft 53 in the vicinity of a bearing pipe mounting portion of the arm 20. A lock hole 51 a formed at a lower portion of the lock plate 51 and a notch hole formed in the arm 20. It is urged to rotate clockwise by a tension spring 54 mounted between the spring 20d and the spring 20d.

The upper portion of the lock plate 51 protrudes upward from a notch hole 20e formed in the arm 20, and an operation lever 52 is integrally provided at this protruding portion. Further, the inner end 10b of the vehicle body side arm 10 is
A hook portion 51b that contacts the back surface is formed.

On both sides of the cab side arm 20,
An insertion hole 20f for inserting the lock pin 55 is formed. The insertion hole 20f has a circular portion 20g, and a slit portion 20h extending in the axial direction continuously to the circular portion 20g.
It consists of The lock pin 55 includes a shaft portion 55a, grip portions 55b and weight portions 55c formed at both ends of the shaft portion 55a, and the diameter of the shaft portion 55a is equal to the diameter of the insertion hole 2.
The diameter of the circular portion 20g of 0f and the shape of the weight portion 55c are set substantially the same as the shape of the slit portion 20h, and the length of the shaft portion 55a is set slightly longer than the length of the arm 20 in the width direction. ing. Further, the lock pin 55 has a locking hole 55d formed in the grip portion 55b.
And the locking portion 20 m formed on the arm 20, and is attached to the arm 20 by a wire 56 mounted on the arm 20.

Next, the operation of the first embodiment of the present invention will be described.

When the cab 40 is tilted as shown in FIG. 3, the hinge device E is moved by the spring force of the tension spring 54 as shown in FIG.
b is in pressure contact with the back surface of the inner end 10 b of the vehicle body side arm 10, and the lock pin 55 is inserted into the insertion hole 20 f of the cab side arm 20. In this case, the weight portion 55c of the lock pin 55 protruding from the side surface of the arm 20
Is rotated in the direction of the circular portion 20g by its own weight, thereby preventing the lock pin 55 from dropping out of the insertion hole 20f.

In order to bring the cab 40 to the normal position from the tilt position, first, the lock pin 55 is taken out from the insertion hole 20f. Next, the operation lever 52 is rotated counterclockwise against the spring force of the tension spring 54. Then, the engagement between the hook portion 51b of the lock plate 51 and the back surface of the inner end side 10b of the vehicle body side arm 10 is released. When the cab 40 is lowered in this state, the vehicle body side arm 10 rotates clockwise about the support shaft 44, while the cab side arm 20
Is superimposed in the vehicle body side arm 10 while rotating counterclockwise about the connection shaft 31. This allows the cab 40 to be in the normal position.

By the way, in the hinge device E of the present invention,
A reinforcing tongue piece 21 is provided at the end of the cab-side arm 20 on the bearing pipe mounting side, and the reinforcing tongue piece 21 is brought into contact with the outer surface of the outer surface of the bearing pipe 30 , and this contact portion is welded.
Since they are integrally fixed, the strength of the periphery of the bearing pipe is greatly improved. Therefore, it is possible to prevent the peripheral portion of the bearing pipe from being broken by the tensile load applied to the peripheral portion of the bearing pipe, and to improve the durability of the hinge device E. FIG. 4 is a perspective explanatory view showing a state of a peripheral portion of a bearing pipe according to a second embodiment of the present invention.
A is processed to be longer than the reinforcing tongue piece 21 of the first embodiment to increase the contact area with the outer surface of the bearing pipe 30 to further improve the strength.

FIG. 5 is a perspective explanatory view showing a state of a peripheral portion of a bearing pipe according to a third embodiment of the present invention.
1B is formed to be longer than the reinforcing tongue piece 21A of the second embodiment, and is closely attached to the outer peripheral surface of the bearing pipe 30 to further improve the strength.

FIG. 6 is a perspective explanatory view showing a state of a peripheral portion of a bearing pipe according to a fourth embodiment of the present invention.
1C is to bend the left and right end portions of the reinforcing tongue piece 21 shown in the first embodiment to the side opposite to the bearing pipe 30, thereby further increasing the strength of the reinforcing tongue piece 21C itself, and furthermore, the strength of the periphery of the bearing pipe. Has been improved.

In each of the above embodiments, the bearing structure is such that the bearing pipe 30 is provided only on the inner end side 20b of the cab side arm 20.
The outer end sides 10a and 20b of the 0 and cab side arms 20 may have the same bearing structure. Further, a bearing structure in which the bearing pipe 30 is provided on the inner end side 10b of the vehicle body side arm 10 instead of the inner end side 20b of the cab side arm 20 may be adopted.

[0027]

As described above, according to the present invention, a reinforcing tongue is formed to protrude from the end of the arm on the bearing pipe mounting side .
This reinforcing tongue is brought into contact with the outer surface of the bearing pipe,
Since the portions are integrally fixed by welding, the strength of the peripheral portion of the bearing pipe can be greatly increased. by this,
It is possible to sufficiently cope with a tensile load applied to the peripheral portion of the bearing pipe, to prevent the peripheral portion of the bearing pipe from breaking, and to improve the durability of the hinge device.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a hinge device of a tilt cab type vehicle according to a first embodiment of the present invention.

FIG. 2 is an explanatory perspective view of a bearing pipe mounting side arm.

FIG. 3 is a schematic front explanatory view showing a part of a tilt cab type vehicle equipped with the hinge device according to the present invention.

FIG. 4 is a perspective explanatory view showing a state of a peripheral portion of a bearing pipe according to a second embodiment of the present invention.

FIG. 5 is an explanatory perspective view showing a state of a peripheral portion of a bearing pipe according to a third embodiment of the present invention.

FIG. 6 is an explanatory perspective view showing a state of a peripheral portion of a bearing pipe according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory perspective view showing a peripheral portion of a bearing pipe of a hinge device of a conventional tilt cab type vehicle.

FIG. 8 is a perspective explanatory view showing a broken state of a peripheral portion of the bearing pipe shown in FIG. 7;

[Explanation of symbols]

 E Hinge device for tilt cab type vehicle 10 Body side arm 10a Outer end side 10b Inner end side 20 Cab side arm 20a Outer end side 20b Inner end side 21 Bearing pipe attachment side end (reinforcement tongue piece) 21A Reinforcement tongue piece 21B Reinforcement tongue Piece 21C reinforcing tongue piece 30 bearing pipe 40 cab 41 chassis frame 50 lock mechanism 51 lock plate 52 operating lever 54 tension spring 55 lock pin

──────────────────────────────────────────────────続 き Continuation of the front page (56) Reference Jikgyo Hei 3-8545 (JP, Y2) Jigyo Sho 35-6623 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁶ , DB name) B62D 33/06-33/073

Claims (1)

(57) [Scope of request for utility model registration] 1. A bearing pipe is provided in a width direction on one of inner ends of a cab-side arm and a vehicle-body-side arm having a U-shaped cross section for attaching an outer end to a vehicle body and a cab, respectively. And a hinge shaft of a tilt cab type vehicle having a vehicle body side and a cab side foldably connected by inserting a connection shaft into the bearing pipe, wherein the arm is reinforced at a bearing pipe mounting side end of the arm. Projecting tongue piece
The reinforcing tongue is brought into contact with the outer surface of the bearing pipe.
A hinge portion for the tilt cab type vehicle , wherein the contact portion is welded and fixed integrally .