JPH1029479A - Vehicle with retracting rear bamper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle having a retracting rear bamper in which a mounting position of the rear bamper can be easily moved in a direction where its ground height may become high in such a way that the rear bamper is not abutted against any equipment placed on the ground when a vehicle moves in a rearward direction. SOLUTION: This vehicle having a retracting rear bamper is constructed such that a rear bamper 3 is mounted below a rear part of a vehicle chassis 2 of the vehicle in a vehicle width direction and a mounting position of the rear bamper 3 is movably arranged in such a direction as one in which its ground height is increased. A moving device (a) to cause the rear bamper 3 to move is arranged at the rear bamper 3, the moving device (a) is provided with a bent link mechanism 18 which can be bent to keep its extended state for supporting a shock applied against the rear bamper 3 and further an operation switch 4 for operating the moving device (a) is installed at such a position as one where a driver can operate it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle having a rear bumper which is retracted.

[0002]

2. Description of the Related Art A dump truck is provided with a rear bumper for preventing a rear-end collision. At the time of loading, the lower and rear sides of the rear bumper hit the earth and sand dropped from the loading platform and hindered running, and the rear bumper hit a part of the waiting work vehicle, and the inconvenience sometimes occurred. There is a disadvantage that the parts of the working vehicle are damaged.

In particular, when pouring stones or gravel on the bed of a dump truck into a hopper of a gravel plant, or when retreating a dump truck in front of an asphalt finisher, a rear bumper is used for equipment around the hopper or asphalt finisher of the gravel plant. There was an inconvenience that it had to be removed each time it came into contact.

The present invention provides a vehicle equipped with a retractable rear bumper which solves the above-mentioned problem by moving the position of the rear bumper so as to increase the ground height via a moving device having a bending link mechanism. Is what you do.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

[0006] A rear bumper 3 is installed in the width direction of the vehicle below the rear portion of the chassis 2 of the vehicle 1, and a moving device a for moving the installation position of the rear bumper 3 in a direction of increasing the ground height is provided on the rear bumper 3. The rear bumper 3
A vehicle equipped with a retractable rear bumper, wherein a bending link mechanism 18 for supporting an impact on the vehicle is provided, and an operation switch 4 for operating the moving device a is provided at a position where the driver can operate. is there.

Further, a rear bumper 3 is installed in the width direction of the vehicle below the rear part of the vehicle body 2 of the vehicle 1, and the installation position of the rear bumper 3 is provided so as to be movable in a direction of increasing the ground height. A moving device a to be moved is provided on the rear bumper 3, and a bending link mechanism 18 for supporting the impact on the rear bumper 3 while maintaining a stretchable state is provided for the moving device a, and the moving device a is operated. The present invention relates to a vehicle provided with a retractable rear bumper, wherein an operation switch 4 to be operated is provided at a position where the driver can operate it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings, which are examples of embodiments, showing the functions and effects.

An embodiment according to claim 1 will be described.

When the operation switch 4 is operated, the moving device a is operated, and the erection position of the rear bumper 3 is changed to the bending link mechanism 18.
As a result, the rear bumper 3 moves in a direction in which the ground height is increased, and the rear bumper 3 collides with an instrument or earth and sand installed on the ground while the vehicle 1 is traveling, thereby obstructing the traveling and damaging parts of the instrument.

When the operation switch 4 is reversely operated and the rear bumper 3 is returned to the original state by the bending link mechanism, the bending link mechanism 18 returns to the original state of supporting the shock to the rear bumper 3, so that the vehicle is returned again. When the vehicle 1 is backed or collided, it comes into contact with the rear bumper 3 to protect the vehicle body from damage.

A second embodiment will be described.

When the operation switch 4 is actuated, the moving device a is actuated, and the erection position of the rear bumper 3 is changed to the bending link mechanism 18.
The rear bumper 3 hits instruments or earth and sand installed on the ground during traveling of the vehicle 1 and hinders traveling, or damages machine parts. Disappears.

When the operation switch 4 is reversely operated to return the rear bumper 3 to the original state, the bending link mechanism 18 maintains the extended state and supports the impact to the rear bumper 3, so that the vehicle 1 backs. The rear bumper 3 is brought into contact with the rear bumper 3 when a rear-end collision occurs, thereby protecting the vehicle body from damage.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 show a first embodiment, FIGS. 3, 4 and 5 show a second embodiment, and FIGS. 7 shows a fourth embodiment, FIG. 7 shows a fourth embodiment, and FIG. 8 shows a fifth embodiment.

A rear bumper 3 is erected in the width direction of the vehicle below the rear part of the pedestal 2 of the vehicle 1, and a moving device a for moving the erected position of the rear bumper 3 in a direction of increasing the ground height is provided on the rear bumper 3. The rear bumper 3
A bending link mechanism 18 for supporting an impact on the moving device a is provided, and an operation switch 4 for operating the moving device a is provided at a position where the driver can operate.

A rear bumper 3 is erected in the width direction of the chassis below the rear portion of the chassis 2 of the vehicle 1, and the erected position of the rear bumper 3 is provided so as to be movable in a direction of increasing the ground height, and the rear bumper 3 is moved. Move the moving device a to the rear bumper 3
And a bending link mechanism 18 for supporting the impact to the rear bumper 3 while maintaining a stretchable state in the moving device a. The driver operates an operation switch 4 for operating the moving device a. Provide at a position where it can be.

The first embodiment will be described. (FIGS. 1 and 2) Bearings 26 and 26 are provided near the lower rear portion of the chassis 2 and these bearings 26 are provided.
The shaft stoppers 27 protruding from the rear bumper 3 are attached to the shaft 28.
Connect at 28. At the front upper ends of the left and right shaft stoppers 27, fulcrum shaft portions 29, 29 are provided, respectively. On the other hand, front bearings 30, 30 are provided on the left and right of the upper part of the chassis 2 slightly forward of the bearings 26, 26, and a through shaft 31 is laid on the front bearings 30, 30. The bases of the link rods 32, 32 whose bases are formed in a bifurcated joint shape on the fulcrum shafts 29, 29 of the bearing pieces 27, 27 are axially fitted with link pins 33, 33,
The bases of the front links 34, 34 are integrally fastened to the left and right of the through shaft rod 31 by welding or other means, and the front ends of the front links 34, 34 and the front ends of the link rods 32, 32 are connected to the link pins 35, 32. The pivotal link mechanism 18 is pivoted at 35 to form the bending link mechanism 18, and the base portions of the stoppers 36, 36 on the left and right sides of the undercarriage 2 where the linking rods 32, 32 and the front links 34, 34 prevent downward bending. .

A lever 37 is integrally fixed to a substantially central portion of the through shaft 31 by welding or other means, and is mounted on a bracket 38 protruding from a central portion of the chassis 2 near the front side of the fluid cylinder 17 such as an air cylinder or a hydraulic cylinder. The base end is pivotally mounted, and the distal end of the piston rod 17 'of the fluid cylinder 17 and the distal end of the lever 37 are pivotally mounted.

Since the present embodiment is configured as described above, the following operational effects are obtained.

When the operation switch 4 is turned on, energetic fluid flows into the fluid cylinder 17 and the piston rod 1
7 'is pushed rearward, so that the tip of the lever 37 fixed to the passing shaft 31 rotates counterclockwise around the front bearings 30 and 30 and is fixed to the left and right ends of the passing shaft 31. Front link 34
34, the other ends of the link rods 32 are also the front bearings 30
And the rear bumper 3 is rotated counterclockwise about the shafts 28 and 28 of the bearings 26 and 26 by the bending link mechanism 18 so that the erected position of the rear bumper 3 is obliquely upward on the front side. The top of the vehicle 1 running while the height of the ground between the lower surface of the rear bumper 3 and the ground rises, and the lower end of the rear bumper 3 Partial interference is prevented.

When the position of the lever of the operation switch 4 is turned off, the fluid cylinder 17 is operated in reverse and the piston rod 17 '
Is returned to the original position, the reverse operation is performed, the tip of the lever 37 rotates clockwise, and the bending link mechanism 18 returns the rear bumper 3 to the original vertical state as shown by the solid line in FIG. . In this case the link lever 32, 32, the front link 34, 34 the rear bumper 3 and then returned to the extended state of non bent is fixed in position, provided continuously impact force received from the rear of the rear bumper 3 in a linear state Link pins 33, 33, link rod 32
32, the link pins 35, 35 and the through shaft 31 can be sufficiently supported, so that the original function of the rear bumper 3 is achieved.

Further, as shown in the drawing, the fluid cylinder 17 is hardly impacted, so that it is safe.

A second embodiment will be described. (FIGS. 3, 4 and 5) Bearings 39/39 are provided on the lower left and right sides of the rear part of the rear of the chassis 2 and the shaft stoppers 40/40 projecting from the rear bumper 3 are attached to the bearings 39/39. At 41 pivot. Support shaft portions 42 are provided at lower front ends of the left and right shaft stoppers 40, 40, respectively. On the other hand, front bearings 43 are provided on the left and right of the lower part of the undercarriage 1 slightly forward of the bearings 39, and a through shaft 44 is installed on the front bearings 43. The bases of the rear links 45, 45 are attached to the fulcrum shafts 42, 42 of the shaft stoppers 40, 40, and the bases of the front links 46, 46 are integrally fixed to the left and right of the through shaft rod 44 by welding or other means. Wear, rear link 45
The link ends of the front links 46, 46 are axially attached to each other by link pins 47, 47 to form the bending link mechanism 18, and the rear links 45, 45 are provided with stoppers 48, 48 for preventing downward bending, and are provided at the rear. A moving device a for retracting the bumper 3 to a position where the height above the ground is increased is configured.

A lever 49 is integrally fixed to the substantially central portion of the through shaft 44 by welding or other means, and a fluid cylinder such as an air cylinder or a hydraulic cylinder is mounted on a bracket 2 ′ protruding from the front center portion of the chassis 2. The base end of 17 is pivoted, and the fluid cylinder
The tip of the piston rod 17 'of 17 and the tip of the lever 49 are axially mounted. Reference numeral 50 in the drawing denotes a return spring for urging the return operation of the piston rod 17 '.

Since the present embodiment is configured as described above, the following operational effects can be obtained.

As described above, when the operation switch 4 is turned on and the piston rod 17 'of the fluid cylinder 17 is pushed forward, the end of the lever 49 fixed to the through shaft 44 is moved to the front side bearing 43. The other end of the front link 46, which is fixed to the left and right ends of the through shaft 44, also rotates clockwise around the shaft 43, and the rear bumper 3 is bent by the bending link mechanism 18.
Rotates counterclockwise about the shafts 41 of the bearings 39, 39, so that the erected position of the rear bumper 3 moves up and down diagonally upward on the front side and retreats to a position where the ground height is increased. The height of the ground between the lower side surface and the ground is increased, and the lower end of the rear bumper 3 is prevented from colliding with the ground embankment or a part of the working machine.

When the operation switch 4 is turned off and the fluid cylinder 17 is operated in reverse to return the piston rod 17 'to the original position, the operation is reversed, and the end of the lever 49 rotates counterclockwise. Then, the rear bumper 3 returns to the original vertical state as shown in FIG. At this time, the rear link 45, 45 and the front link 46, 46 return to the extended state via the stopper 48, so that the rear bumper 3 is fixed at a fixed position, and the impact force received from the rear is linearly connected. Fulcrum shaft 42, 42, rear link 45, 45, link pin 47.4
7. Since the front links 46, 46 and the through shaft 44 can be sufficiently supported, they fulfill the role of the original rear bumper. Further, as shown in the drawing, the fluid cylinder 17 is hardly impacted, so that it is safe.

The third embodiment will be described. (FIG. 6) Bearings 52 are provided on the lower left and right sides of the rear of the chassis 2.
・ The upper portions of the shaft stoppers 53 projecting from the rear bumper 3 at 52 are pivotally connected with the shafts 54.

The fulcrum shaft portions 55 are provided at the front lower ends of the left and right shaft stoppers 53, 53, respectively. On the other hand, front bearings 56 are provided on the left and right in the middle of the chassis 2 slightly forward of the shafts 52, and the bases of the cylinder link bars 57 are mounted on the front bearings 56 with link pins 58. Brackets 2 ′ and 2 ′ are provided on the left and right sides of the chassis 2 in front of the front bearing 56, and the bases of the fluid cylinders 17 are axially mounted on the brackets 2 ′ and 2 ′. A projecting portion is provided substantially at the front of the center of 57, and this projecting portion and the piston rods 17 ', 17' of the fluid cylinders 17, 17 are axially mounted on cylinder pins 59, 59. The stoppers 63 that prevent the upward rotation of 57
Between the other ends of 57 and 57 and the fulcrum shaft portions 55 of the shaft stoppers 53 and 53 via link rods 60 and 60, both are pivotally connected by link pins 61 and 61 and link pins 62 and 62. The bending link mechanism 18 is configured.

Since the present embodiment is configured as described above, the following operational effects are obtained.

When the operation switch 4 is turned ON, the fluid cylinder
When the 17/17 piston rods 17 '/ 17' are pulled forward,
Since the cylinder link rods 57 rotate counterclockwise about the front bearings 56, the other end of the cylinder link rod 57 rotates counterclockwise, and the fulcrum shaft 55 of the shaft stoppers 53.・ 55
Is rotated counterclockwise around the bearings 52 by the bending link mechanism 18 of the cylinder link rods 57, 57 and the link rods 60, 60, and the erected position of the rear bumper 3 moves up and down diagonally upward and forward on the ground. Retreat to a position where the height is high.

When the operation switch 4 is turned off and the fluid cylinder 17 is operated in reverse to return the piston rod 17 'to the original position, the operation opposite to the above-mentioned operation causes the rear bumper 3 to return to its original position as shown by the solid line in FIG. It returns to the vertical state, and the cylinder link rod 57 and the link rod 60 return to the extended state via the stopper 63, so that the rear bumper 3 is fixed at a fixed position, and the impact force received from the rear is connected in a straight line. Link pin 62,
Since the link rod 60, the link pin 61, the cylinder link rod 57, and the front bearing 56 can be sufficiently supported, the original function of the rear bumper 3 is achieved. Further, as shown in the drawing, there is almost no impact on the fluid cylinder 17, which is safe.

Next, a fourth embodiment will be described. (Fig. 7) Shaft stoppers with projecting bearings 64, 64 projecting diagonally rearward on the lower left and right sides of the rear of the chassis 2 and projecting the rear bumper 3 on the bearings 64, 64.
65.65 is pivoted on axis 66.66. The fulcrum shaft portions 67, 67 are provided at the lower front ends of the left and right shaft stoppers 65, 65, respectively. One-side bearing 64
Front bearings 68 are provided on the lower left and right sides of the chassis 2 slightly in front of the chassis 64.
A 68 is provided, and a through shaft 69 is erected on the front bearings 68. The fulcrum shaft 67/67 of the shaft stopper 65/65 and the rear link 70/70
The bases of the front links 71, 71 are fixed to the left and right sides of the through rod 69 by keying or welding or other means, and the rear links 70, 70, Front link
The connecting ends of 71 and 71 are pivotally connected by link pins 72 and 72 to form a bent link mechanism 18, and rear links are connected to rear links 70 and 70.
70, stopper that prevents the front link 71 from bending downward
A moving device a for moving the rear bumper 3 up and down is provided by providing 73.

A lever 74 is integrally fixed to the substantially central portion of the through shaft 69 by keying, welding or other means, and a bracket 2 'is attached to the center of the chassis 2 slightly forward of the front bearings 68. A base end of a fluid cylinder 17 such as an air cylinder or a hydraulic cylinder is axially mounted on the bracket 2 ′, and a distal end of a piston rod 17 ′ of the fluid cylinder 17 and the lever 7.
Axle with the tip of 4.

Since the present embodiment is constructed as described above, when the operation switch 4 is turned on and the piston rod 17 'of the fluid cylinder 17 is pulled forward, the through shaft 69 moves the front bearings 68.6.
Rotates clockwise around 8 so that the front link 71
Rotates clockwise, and the front link 71, 71 and the link pin 72
The rear links 70, 70, which are pivotally mounted at 72, are rotated by the bending link mechanism 18, and the bearing pieces 65, 65 are rotated counterclockwise about the axes 66, 66, and the rear bumper 3 is erected. The position is raised and lowered obliquely upward on the front side and retracted to a position where the ground height is increased, so that the lower end of the rear bumper 3 is prevented from interfering with the ground embankment and a part of the working machine.

When the operation switch 4 is turned off and the fluid cylinder 17 is operated in reverse to return the piston rod 17 'to the original position, the operation is reversed, and the end of the lever 74 rotates counterclockwise and bends. The link mechanism 18 returns the rear bumper 3 to the original vertical state. At this time, the rear links 70, 70 and the front links 71, 71 return to the extended state through the stoppers 73, 73, so that the rear bumper 3 is fixed at a fixed position, and the impact force received from the rear is linearly changed. A series of fulcrum shafts 67
・ 67, rear side link 70 ・ 70, link pin 72 ・ 72, front side link 71 ・ 71, through shaft 69 can be sufficiently supported, so that it plays the role of the conventional rear bumper 3, as shown in the figure. Since the fluid cylinder 17 receives almost no impact, it is safe.

Next, a fifth embodiment will be described. (Fig. 8) Bearings 20 and 20 are provided on the right and left of the rear center of the chassis 2,
A through shaft 21 is erected on the bearings 20.
The bases of the vertical links 76 are fixed to the left and right sides of each other by keying or welding or other means.

On the other hand, front bearings 78 are provided on the lower left and right sides of the undercarriage 2 slightly in front of the bearings 20, 20, and the front bearings 78 are provided.
・ The base of the bumper link bars 79, 79 with the rear bumper 3 protruding rearward at 78 are pivotally mounted with link pins 80, 80, and projecting portions 81, 81 are provided above the rear of the bumper link bars 79, 79. ,
The bases of the upright links 82, 82 are axially attached to the protruding sections 81, 81 with link pins 83, 83, and the above vertical links 76, 76,
The other ends of 82 and 82 are axially attached to each other with link pins 83 and 83 to form a bending link mechanism 18, and the vertical links 76
76, a stopper 84 is provided to prevent the rear link 82 from bending rearward, and the moving device a is configured to move the rear bumper 3 up and down to retreat to a position where the ground height is increased.

A lever 77 is integrally fixed to a substantially central portion of the through shaft 21 by keying, welding or other means, and a bracket 2 'is provided at a central portion of the chassis 2 above the front bearings 78. The base of a fluid cylinder 17 such as an air cylinder or a hydraulic cylinder is pivotally mounted on the bracket 2 ', and the distal end of a piston rod 17' of the fluid cylinder 17 and the distal end of the lever 77 are pivotally mounted.

Since the present embodiment is constructed as described above, when the operation switch 4 is turned on and the piston rod 17 'is pushed backward as in the case of the above-described embodiment, the lever 77 is moved to the bearing 2
2 and the through shaft 21 rotates counterclockwise, so that the vertical links 76 and 76 rotate counterclockwise. 79 rotates clockwise around the link pins 80 to move and retract to a position where the ground height of the rear bumper 3 becomes higher.

When the operation switch 4 is turned off and the fluid cylinder 17 is operated in reverse, the rear bumper 3 is returned to the original vertical state by the operation opposite to the above.

[0043]

According to the first aspect of the present invention, when the operation switch is operated, the moving device is operated from a predetermined fixed position, and the erected position of the rear bumper is adjusted by the bending link mechanism. It is possible to prevent the rear bumper from retreating in the direction in which the height is increased and the rear bumper from hitting an instrument or a protrusion on the ground and hindering the traveling during traveling, or from damaging parts of the instrument.

When the operation switch is reversely operated to return the rear bumper 3 to the original state by the bending link mechanism, the bending link mechanism returns to the original state of supporting the impact, so that the rear bumper functions as the original rear bumper. The vehicle is provided with a practically evacuating rear bumper that comes into contact with this rear bumper when the vehicle is backed or hit by a collision and protects the vehicle body from damage.

According to the second aspect of the present invention, when the operation switch is operated, the moving device is operated, and the rear bumper is retracted from the predetermined fixed position in the direction of increasing the ground height by the bending link mechanism. The bumper hits instruments or protrusions installed on the ground and hinders traveling,
Damage to parts of the equipment can be prevented.

If the rear bumper is returned to the original state by the bending link mechanism by operating the operation switch in reverse, the bending link mechanism returns to the state of supporting the impact while maintaining the extended state, so that the rear bumper is returned to the original state. It has a practically excellent evacuation rear bumper that will play the role of a rear bumper and abut against this rear bumper when the vehicle is backed or hit by a collision, and protects the vehicle body from damage. Vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is an explanatory side view of the first embodiment.

FIG. 3 is a side view of a second embodiment of the present invention.

FIG. 4 is a side view showing the operation of the second embodiment.

FIG. 5 is an exploded perspective view of a second embodiment of the present invention.

FIG. 6 is an explanatory side view of a third embodiment of the present invention.

FIG. 7 is an explanatory side view of a fourth embodiment of the present invention.

FIG. 8 is an explanatory side view of a fifth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 vehicle 2 chassis 3 rear bumper 4 operation switch 18 bending link mechanism a moving device

Claims (2)

[Claims] 1. A rear bumper is installed in a width direction of a vehicle below a rear portion of a vehicle undercarriage, and a moving device for moving an installation position of the rear bumper in a direction of increasing the ground height is provided in the rear bumper. A vehicle equipped with a retreating rear bumper, wherein a bending link mechanism for supporting an impact to the rear bumper is provided, and an operation switch for operating the moving device is provided at a position operable by a driver. 2. A moving device for erection of a rear bumper in a width direction of a vehicle below a rear portion of a chassis of the vehicle, movably mounting the rear bumper in a direction in which a height above the ground is increased, and moving the rear bumper. Provided on the rear bumper, provided with a bending link mechanism that supports the impact on the rear bumper while maintaining the extended state by being bendable to this moving device, and an operation switch that operates this moving device is set to a position where the driver can operate it A vehicle equipped with a retractable rear bumper, which is provided.