JPS6137584Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cab suspension with a height adjustment mechanism.

The first truck is equipped with a cab suspension.
To explain the diagram, 01 is the chassis frame 0
03 is a bridge frame bridged between the same chassis frames 02, 04 is a floating bar provided via the suspension mechanism 05, 06 is a cab 01 This is a hook for locking the floating bar 04 to the floating bar 04. In the conventional device described above, the spring constant of the suspension mechanism 05 is set to be relatively small in consideration of the riding comfort of the occupants in the cab. However, even if the vehicles are of the same type, depending on the specifications, cab 01 may be mounted on the chassis frame.
The amount of deflection deformation of the suspension mechanism 05 differs on the left and right sides of the cab due to fluctuations in the center of gravity of the cab, and changes in load due to equipment installed inside and outside the cab.
The mounting position of the vehicle was tilted in the width direction of the vehicle body, resulting in a problem that made the ride uncomfortable for the occupants inside the cab.

The present invention has been devised in view of the above, and includes a floating bar arranged along the width direction of the vehicle body via a suspension mechanism on a bridge frame that bridges between the chassis frames. A height adjustment mechanism is provided between the frame and the suspension mechanism for adjusting the suspension mechanism in the vertical direction of the vehicle body, and the height adjustment mechanism includes a fixed bracket provided on the bridge frame; A movable bracket is provided on the suspension mechanism and is fitted into the fixed bracket so as to be slidable in the vertical direction and has a long hole extending in the vertical direction; a guide bolt that is screwed onto the fixed bracket and regulates displacement between both brackets during tightening; and a height adjustment screw that is screwed onto the fixed bracket and has an axis extending in the vertical direction and whose upper end abuts the movable bracket. The gist of this invention is a cab suspension with a height adjustment mechanism, which is characterized by having a bolt.

According to the present invention, in addition to being able to adjust the mounting posture of the cab to an appropriate state by the adjustment mechanism, the suspension mechanism can be adjusted to a desired height with respect to the bridge frame by rotating the height adjustment bolt. After adjustment, the displacement of the movable bracket with respect to the fixed bracket is restricted by tightening the guide bolt, so that the force between the movable bracket on the cab side and the fixed bracket on the bridge frame side is reduced. The transmission path can include not only the height adjustment bolt but also the guide bolt. Therefore, the force will not be concentrated on the height adjustment bolt, so if a large force is transmitted between the cab and the bridge frame due to vibrations while driving or impact when passing over a bump on the road surface, etc. However, it has the effect of greatly reducing problems caused by breakage or damage of the height adjustment bolt.

Next, the present invention will be explained based on the embodiment shown in FIGS. 2 and 3. 1 is a chassis frame, 2 is a bridge frame, 3 is a floating bar, and 4 is a shock absorber 5 and a coil spring 6. The suspension mechanism 7, which is known per se, is a height adjustment mechanism consisting of fixed brackets 8 provided on both sides of the bridge frame 2 and movable brackets 9 forming spring seats for the coil springs 6. To explain the mechanism 7 in more detail, the movable bracket 9 is formed with a guide slit 11 that loosely passes through a guide bolt 10 screwed onto the fixed bracket 8, and both side walls of the guide slit 11 are connected to the fixed bracket as shown in FIG. The shock absorber 6 is fitted into the fixed bracket 8 so as to be in sliding contact with both side walls of the shock absorber 8, and the lower end of the shock absorber 6 is pivotally mounted on the upper wall thereof. 12 is a sleeve that is fixed to the fixed bracket 8 and has a thread carved inside; 13 is a height adjustment bolt that is screwed into the sleeve 12; the upper end of the bolt 13 is in contact with the lower surface of the upper wall of the movable bracket 9; . 14 is a stopper provided on the floating bar 2 to restrict upward displacement of the same bar 2; 15 is a stopper provided on the floating bar 2 to restrict downward displacement of the same bar 2; 16 is a tilt type cab; 17 is a cab 16 A locking tool 18 provided at the rear for locking the cab 16 to the floating bar 3 is a cushion rubber provided on the floating bar 3.

Since this embodiment is configured as described above,
In the normal state, the cab 16 is placed on the floating bar 3 in the state shown in FIG. When the cab 16 is tilted in the width direction of the vehicle body, the height adjustment mechanism 7 is operated. To do so, first loosen the guide bolt 10, and then
3 in the vertical direction, the movable bracket 9, which is a spring seat, moves up and down. The spring of the suspension mechanism 4 is thus adjusted, and when the cab 16 is properly mounted on the floating bar 3, the guide bolt 10 is tightened again to restrain the movement of the movable bracket 9. This allows the height of the cab to be adjusted.

As described above, according to this embodiment, it is easy to set the bridge frame 2 at the neutral point of the vertical movement between the stoppers 14 and 15 that limit the vertical movement range of the cab 16. Even if variations occur in the shared loads acting on the shaft mechanism 4, the cab can always be adjusted to an appropriate mounting position. Further, the height adjustment mechanism 7 includes a height adjustment bolt 1
2 to adjust the suspension mechanism 4 to a desired height with respect to the bridge frame 2, the displacement of the movable bracket 9 with respect to the fixed bracket 8 is regulated by tightening the guide bolt 10. Therefore, the force is transmitted between the movable bracket 9 on the cab side and the fixed bracket 8 on the bridge frame 2 side using the height adjustment bolt 12.
In addition, the guide bolt 10 can also be used as the path.

Therefore, since force is not concentrated on the height adjustment bolt 12, large force is not transmitted between the cab and the bridge frame 2 due to vibrations during driving or impact when passing over a bump on the road surface. Even if the height adjustment bolt is broken or damaged, it is possible to greatly reduce problems caused by damage or breakage of the height adjustment bolt.

[Brief explanation of drawings]

Fig. 1 is a rear view of the conventional device, Fig. 2 is an enlarged rear view similar to Fig. 1 of the embodiment of the present invention, and Fig. 3 is a rear view of the conventional device.
The figure is an enlarged sectional view taken along the arrow line in FIG. 1; Palm frame, 2; Bridge frame,
3; floating bar; 4; suspension mechanism; 7; height adjustment mechanism; 16; cab.

Claims (1)

[Scope of utility model registration request] A floating bar is arranged along the width direction of the vehicle body via a suspension mechanism on a bridge frame that bridges between the chassis frames, and the suspension mechanism is installed between the bridge frame and the suspension mechanism. In a vehicle provided with a height adjustment mechanism that adjusts the vehicle body in the vertical direction, the height adjustment mechanism includes a fixed bracket provided on the bridge frame, and a height adjustment mechanism provided on the suspension mechanism that slides vertically on the fixed bracket. A movable bracket is fitted so as to be movable and has an elongated hole extending in the vertical direction, and a movable bracket is inserted through the elongated hole of the movable bracket and is screwed to the fixed bracket, so that when tightened, displacement between both brackets is achieved. and a height adjustment bolt that is screwed onto the fixed bracket and has an axis extending in the vertical direction, and whose upper end abuts the movable bracket. Cab suspension with.