JPH0719941Y2 - Adjusting device for load sensing proportioning valve - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an adjusting device for a load sensing proportioning valve (hereinafter referred to as LSPV) used in an automobile or the like.

(Prior Art) Generally, in a vehicle such as a truck in which the load distribution of the front tires and the rear tires greatly changes between empty and loaded, the ideal braking force distribution line also changes significantly between empty and loaded. . For this reason, it is necessary to change the braking force distribution line when the vehicle is empty and when the vehicle is loaded so that the braking force distribution line fits the ideal curve as much as possible under each condition. In such a case, the LSPV is a valve for controlling the braking force according to the axle load applied to the rear tire.

The conventional adjusting device for attaching the LSPV to the vehicle has a problem that if the components of the suspension are varied, the displacement of the suspension varies even if the same load is applied. Therefore, instead of adding the axial load, a jig that commonly indicates the displacement amount of the suspension is used instead of the second one.
As shown in the figure. This LSPV adjuster is a shackle
20 is removed from the axle 22 having the rear tires 21 and 21 at both ends, the LSPV fixing nut 23 is loosened by hand, and the shackle 20 is moved to the axle 22 with the left hand by the jig 25 showing the displacement amount of the suspension 24 for the specified load. Tighten and fix. And
In this state, insert the socket 27 of the impact wrench 26 into the LSPV fixing nut 23, and in that state, adjust the LSPV main body 30 up and down so that the spool 28 and the rod spring 29 contact each other, and then fix the LSPV. The nut 23 is fastened to the LSPV main body 30.

Moreover, what is shown in FIG. 3 and FIG.
By applying a load directly to the rear deck 32 from above the vehicle,
This is the adjustment work of LSPV.

(Problems to be solved by the invention) However, in the LSPV adjusting device as shown in FIG. 2, since the jig 25 for indicating the displacement amount of the suspension 24 is used in common, the axle 22 is provided for each vehicle. Since it is not possible to directly apply the axial load to the LSPV tightening adjustment work, it is not possible to suppress variations in the LSPV adjustment accuracy between vehicles,
There is a problem that the load at which the LSPV operates varies from the set load. Also, use one hand to lift the shackle 20
25, hold the impact wrench 26 with your other hand,
Since the tip of the socket 27 adjusts the tightening position to the LSPV main body 25 and tightens, there is a problem that the tightening work efficiency decreases.

Further, as shown in FIGS. 3 and 4, when the load is directly applied to the rear deck 32, there is a problem that the axial load value cannot be accurately applied.

Therefore, an object of the present invention is to provide an LSPV adjusting device capable of simplifying the adjustment work of the LSPV and also making the adjustment accuracy of the LSPV accurate.

(Means for Solving the Problem) The structure of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to the embodiment. The present invention shows that the rear tires 3, 3 are mounted on the floor 7. A lifter 6 for lifting and a clamp device 8, 10 for fixing the frame 9 to the floor 7 are provided, and a load sensor 12 is provided on a tire mounting table 13 of the lifter 6 for supporting the rear tires 3, 3. .

(Operation) In the present invention, the frame 9 is fixed to the floor 7 by the clamp devices 8 and 10 by the above-mentioned means. Next, the rear tires 3, 3 are lifted by the lifter 6 while being supported by the tire mounting table 13. At this time, since the frame 9 is fixed to the floor 7, a load is applied to the rear tires 3,3. Then, the load sensor 12 detects the load applied to the rear tires 3, 3, and when the set load is reached, the lifter 6 stops rising.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 is a base frame provided in a portion corresponding to the width of each rear tire 3, 3 of the vehicle 2, which is fixed to an underground floor 4 and provided in a pit 5. Reference numeral 6 denotes a cylinder for lifting the rear tires 3, 3 on the floor 7, which is attached to the base frame 1. Reference numeral 8 is a pole provided outside both base frames 1 and 1, and is fixed to the underground floor 4. A clamp 10 for fixing the vehicle body frame 9 to the floor 7 is attached to the tip of the pole 8. Reference numeral 11 denotes a pedestal provided at the tip of the rod 69 of the cylinder 6. A tire mounting table 13 is provided on the pedestal 11 with a load sensor 12 for detecting a load applied to the rear tires 3 interposed therebetween. A stopper 14 and a tire guide 15 for fixing the rear tires 3, 3 in the front-rear and left-right directions are provided on the tire mounting table 13.

Hereinafter, the operation of the LSPV adjusting device configured as described above will be described.

When the vehicle 2 is loaded onto the floor 7, the rear tires 3, 3 are fixed in the front-rear and left-right directions by the stopper 14 and the tire guide 15. Next, the operator clamps the body frame 9.
Fixed to floor 7 by 10. At this stage, the vehicle 2 is completely fixed to the floor 7. Then, the cylinder 6 is activated and the tire loading table 13 is raised. At this time, since the body frame 9 is fixed to the floor 7, a load is applied to the rear tires 3, 3 as the cylinder 6 rises. Then, the load sensor 13 detects the load applied to the rear tires 3, 3 and
When the load at which the SPV operates is reached, the lifting of the cylinder 6 is stopped.

It is also within the scope of the present invention to use an electric motor instead of the cylinder.

(Effect of the Invention) As described in detail above, according to the LSPV adjusting device of the present invention, the lifter for lifting the rear tire and the clamp device for fixing the frame to the floor are provided on the floor, and the rear tire is supported. By providing a load sensor on the tire mounting table of the lifter, it becomes possible to apply axial load directly to the rear axle for each vehicle and perform LSPV tightening adjustment work, suppressing variation in LSPV adjustment accuracy. In addition to the above, there is an effect that the axial load value can be accurately added and the quality can be improved.

Further, since the work by the jig is unnecessary, it is possible to simplify the complicated work for both hands at the same time, and there is an effect that the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an LSPV adjusting device according to the present invention, FIG. 2 is a side view showing the structure of an LSPV adjusting device using a jig, and FIGS. 3 and 4 show a direct load. It is a side view which shows the structure of the adjustment apparatus of LSPV to add. 3 ... Rear tire 6 ... Lifter 7 ... Floor 9 ... Frame 8, 10 ... Clamping device 12 ... Load sensor 13 ... Tire mounting base

Claims (1)

[Scope of utility model registration request] 1. A load sensing device, comprising: a lifter for lifting a rear tire and a clamp device for fixing a frame to the floor; and a load sensor provided on a tire mounting table of the lifter for supporting the rear tire. Adjusting device for proportioning valves.