JPS6129593Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a support device for an automobile cabin.
In particular, the present invention relates to a support device for an automobile cabin, which supports the cabin on a chassis via a spring.

Seat springs used in large trucks and the like have a large spring constant and are stiffer than those used in passenger cars.
Therefore, if the cabin is placed directly on the chassis, the riding comfort will be very poor, and the driver will become more fatigued when traveling for a long time. In view of these problems,
Trucks in which a cabin is supported on a chassis by means of springs are in practical use. However, when the cabin is further supported by the chassis with springs, ride comfort is significantly improved, and the driver does not feel as much vibration even on rough, bumpy roads, so he or she drives without slowing down. . As a result, the cargo on the carrier that is directly attached to the chassis is subjected to severe vibrations, which may damage the cargo or cause the cargo to collapse.

The present invention was devised in view of these problems, and is designed so that when the live load and the rough road are detected by sensors, the spring supporting the cabin is deflected based on this detection. This is what I did. Therefore, when traveling on a rough road with a load loaded, the springs in the cabin stop working, and the vibrations of the chassis are transmitted to the cabin, resulting in a reduction in speed. This protects the cargo and eliminates cargo damage and collapse.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, a cabin 2 is placed on the front end of a chassis 1 of a large truck according to this embodiment. cabin 2
is supported by the chassis 1 via a pair of coil springs 3 at the front and a pair of coil springs 4 at the rear. The coil springs 3 and 4 are each provided with a shock absorber (not shown) in parallel thereto. The pair of coil springs 3 on the front side are placed on a spring seat 6 attached to the link lever 5. The link lever 5 is rotatably attached to a bracket 7 fixed to the chassis 1 via a pin 8. The upper part of this spring 3 presses the lower surface of a hinge bracket 10 fixed to the frame 9 of the cabin 2 via a spring receiver 11. The hinge bracket 10 and the link lever 5 are connected by a pin 12, and a tilt cylinder 13 is interposed between the hinge bracket 10 and the chassis 1.

The lower end of the spring 4 that supports the rear part of the frame 9 of the cabin 2 is supported by an arm 15 that projects on both sides of the rear arch 14 via a spring seat 16.
The rear arch 14 is formed in an inverted U shape and is fixed to the chassis 1. Also, the upper end of the spring 4 is
It is connected via a spring receiver 18 to the lower surface of a floating bar 17 that supports the rear portions of the pair of frames 9. The floating bar 17 and the rear part of the cabin 2 are locked and connected by a locking means (not shown) when the floating bar 17 is not tilted.

Furthermore, in this embodiment, a pair of hydraulic cylinders 19 are provided on the left and right sides. These hydraulic cylinders 19 are attached to the chassis 1, and their piston rods 20 are connected to the frame 9. The cylinder 19 is activated when oil is supplied from a pump 22 through a valve 21, as shown in FIG. The pump 22 is linked with a motor 23.
Further, control signals are supplied to the drive circuit 24 of the motor 23 from a pair of sensors 25 and 26, respectively.

The sensor 25 is for detecting the load of the cargo on the truck, and is fixedly attached to the lower surface of the chassis 1. The detector 31 of this sensor 25 is connected via a rod 27 to an axle housing 28 of the rear wheel. Therefore, when the chassis spring is deflected by the load of the cargo and the distance between the chassis 1 and the axle housing 28 becomes smaller, the detector 31 moves upward via the rod 27 to detect the load of the cargo. It's becoming like that. Another sensor 26 is composed of an acceleration sensor for detecting rough roads, and is similarly fixed to the chassis 1, and its detector 29 is connected to the rod 3.
0 to the axle housing 28. Therefore, when the distance between the chassis 1 and the axle housing 28 dynamically changes due to vibrations caused by driving on a rough road, the sensor 26 generates a detection output.

The drive circuit 24 also includes a pair of alarm lamps 35,
36 are connected. These lamps 35,3
Reference numeral 6 is configured to light up when the sensors 25 and 26 produce detection outputs, respectively. Therefore, when the load of the cargo is detected by the sensor 25, the lamp 35 is turned on, and when a rough road is detected by the sensor 26, the lamp 36 is turned on.

In the above configuration, the drive circuit 24 of the motor 23 is provided with an anchor, and the two
When the two sensors 25 and 26 both produce detection outputs, the motor 23 is driven by the drive circuit 24. This applies only when the vehicle according to this embodiment is loaded with cargo and travels on a rough road.
This means that the motor 23 is driven by the drive circuit 24. When the motor 23 is driven, oil is supplied to the cylinder 19 by the pump 22, and the cylinder 19 is actuated to draw the piston rod 20 into it. Then, as shown in FIG. 3, the frame 9 of the cabin 2 is forcibly moved downward, causing the springs 3 and 4 to bend greatly.
Rubber protrusions 32 and 33 provided on the spring seats 6 and 16 respectively serve as spring receivers 11 and 18, respectively.
come into contact with.

As a result, the coil spring 3 supporting the cabin 2,
4 completely loses its function, and the cabin 2 is supported by the spring receivers 11 and 18 and the spring seats 6 and 16, and its vibration-proofing effect becomes extremely small. As a result, most of the vibrations of the chassis 1 are transmitted to the cabin, and the driver knows for himself that he is driving on a rough road, and is forced to reduce his driving speed. Therefore, damage to the loaded cargo or collapse of the cargo is prevented.
In this case, the pair of warning lamps 35 and 36 are both turned on, so that the driver can also be warned.

Furthermore, when driving on a flat road or when driving without a load, the sensor 25,
Since at least one of 26 does not produce a detection output, drive circuit 24 also does not operate, and therefore motor 23 and pump 22 do not operate. Therefore, the piston rod 20 is not retracted into the cylinder 19, and the frame 9 of the cabin 2 is held against the shaft 1 by the coil springs 3 and 4 as shown in FIG.
The vehicle will be driven while being supported by the vehicle. Therefore, in this case, good riding comfort can be provided to the driver. Note that since the cylinders 13 and 19 are each provided with a lost motion mechanism, these cylinders 13 and 19 do not reduce the vibration-proofing effect of the coil springs 3 and 4.

Further, when the cabin 2 is tilted by the hydraulic cylinder 13, it is necessary to release the connection between the frame 9 and the chassis 1 by the cylinder 19. Therefore, for example, the connection between the piston rod 20 and the frame 9 is released by a release means (not shown).

Next, a modification of the above embodiment will be explained with reference to FIGS. 5 and 6. In this modification, instead of using a dedicated cylinder 19 for deflecting the springs 3, 4 that support the frame 9 of the cabin 2,
The springs 3 and 4 are bent by the tilt cylinder 13 of the cabin 2. The rest of the configuration is the same, so the same reference numerals as in the above embodiment will be used for explanation.

As shown in FIG. 5, the tilt cylinder 13 is
When the rod 34 is operated in the direction of pushing it out, the frame 9 of the cabin 2
is lifted and rotated forward. This makes it possible to perform maintenance on the engine in the lower part of the cabin 2. Conversely, cylinder 13
When the rod 34 is operated to retract it, the sixth
As shown in the figure, when the frame 9 is pulled toward the chassis 1, the springs 3 and 4 are bent, and the spring receivers 11 and 1 are bent.
8 and the protrusions 32, 33 of the spring seats 6, 16 come into contact with each other. Therefore, it is possible to prevent the cargo from being damaged or collapsing when traveling on rough roads.

In this modification, cylinders 13 are provided on both sides of the chassis 1 in order to bend the springs 3 and 4. Further, in this modification, it is preferable that the connecting portion between the rod 34 and the bracket 10 be located slightly further rearward than in the above embodiment, as shown in the drawings. According to such a configuration, there is an advantage that the number of cylinders can be reduced.

As described above, according to the present invention, when traveling on a rough road with a load loaded, the spring that supports the cabin with respect to the chassis is bent. While driving, vibrations are transmitted to the cabin, causing deceleration. This prevents damage to the cargo and collapse of the cargo. Also, since the cabin is normally vibration-proofed by a spring, a comfortable ride is maintained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cabin support device according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. The figure is a block diagram of the hydraulic system of the cylinder that deflects the cabin spring, Figure 5 is a side view of a modified example of the cabin support device, and Figure 6 is the same side view with the spring supporting the cabin deflected. It is a diagram. In addition, in the symbols used in the drawings, 1...shaft, 2...cabin, 3, 4...coil spring, 1
3...Tilt cylinder, 19...Hydraulic cylinder, 25...Load detection sensor, 26...Rough road detection sensor.

Claims (1)

[Scope of utility model registration request] In an automobile in which a cabin is supported on a chassis via a spring, a load detection sensor detects a live load, a rough road detection sensor detects a rough road condition, and means for deflecting the spring supporting the cabin. A support device for a cabin, characterized in that a spring supporting the cabin is deflected when the two sensors detect a live load and a rough road, respectively.