JPH0680112U - Vehicle height measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vehicle height measuring device capable of measuring the height of a vehicle body frame without error. [Structure] Trunnion part 43 provided on the upper part of the axle 41
And a bracket 47 provided on the vehicle body frame 45, a torque rod 49 for rotating the trunnion portion 43 with the bracket 47 as a rotation center is interposed, and the torque rod transmitted by the connecting bar 53. The potentiometer 5 for outputting the rotation angle θ of the
Supported by 45.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for measuring the height of a vehicle body frame.

[0002]

[Prior art]

 Conventionally, as one technique for automatic measurement of automobiles, displacement of shock absorbers, hydraulic pressure of hoist, stroke amount of suspension, etc. are used to obtain the height of the vehicle, and strain generated on the axle is measured using strain gauges. There are techniques for measuring the change in vehicle height or calculating the loaded weight in consideration of the spring constant of the suspension.

[0003]

[Problems to be solved by the device]

 However, in these technologies, it is necessary to measure the distance between vehicle members that move separately and are spaced apart from each other as a stroke amount, which results from moving separately. As a result, the measurement error becomes large and the predetermined measurement accuracy cannot be obtained. In addition, when a shock absorber is installed, there is a problem in that its non-linearity, hysteresis, etc. affect the measurement accuracy, and sufficient measurement accuracy cannot be obtained.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicle height measuring device that does not measure a stroke amount and is not affected by a spring constant of a suspension or the like. To aim.

[0005]

[Means for Solving the Problems]

 For this reason, the present invention provides a spring interposed between the axle housing to which the wheels are attached and the vehicle body frame, a torque rod whose one end is rotatably fixed to the vehicle body frame and the other end is attached to the axle housing, In the vehicle including the above, an angle detection device for detecting the rotation angle of the torque rod is provided on the body frame, and the height of the body frame is obtained based on the rotation angle.

[0006]

[Action]

 In such a configuration, when the vehicle height of the vehicle body frame changes, the spring interposed between the axle housing and the vehicle body frame bends. Here, since the other end of the torque rod is attached to the axle housing, the torque rod rotates about one end rotatably fixed to the torque rod body frame in accordance with the change. Then, the rotation angle of the torque rod is detected by an angle detection device provided on the body frame, and the vehicle height of the body frame is obtained based on the rotation angle.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1, a vehicle height measuring device according to the present invention comprises a device body 1, an input portion 2 connectable to the device body 1, a power source 3 connected to the device body 1, an ignition switch 4 and a vehicle body frame. A potentiometer 5 as an angle detection device and a display unit 6 provided in the.

Further, as shown in FIG. 2, a trunnion portion 43 is provided on an upper portion of a wheel axle 41 (not shown), and a bracket 47 is provided on a vehicle body frame 45 facing the trunnion portion 43. To be A torque rod 49 for rotating the trunnion portion 43 with the bracket 47 as a rotation center is interposed between the trunnion portion 43 and the bracket 47.

Further, the potentiometer 5 that outputs the turning angle θ of the torque rod as a voltage signal is supported adjacent to the bracket 47 on the vehicle body frame 45, and one end of the potentiometer 5 holds the torque rod 49 by a connecting bar 53. The rotation of the torque rod 49 is transmitted to the input shaft of the potentiometer 5. The device body 1 is provided with an arithmetic processing unit 12 for inputting the rotational angle θ of the torque rod from the potentiometer 5 through the input interface 11 to perform arithmetic processing, a ROM 13, a RAM 14, and a weight calculation from the input unit 2. An EEPROM 15 for inputting and storing a reference value to be used and an input / output interface 16 to which a display unit 6 for displaying output contents from the arithmetic processing unit 12 is connected are provided.

Next, the contents of the calculation performed by the calculation processing unit 12 will be described with reference to the flowchart shown in FIG. In step 1 (denoted as S1 in the figure, the same applies hereinafter), when the vehicle height of the vehicle body frame 45 changes, a spring (not shown) interposed between the axle housing 41 and the vehicle body frame 45 bends, Since the torque rod 49 rotates about the bracket 47 as the center of rotation, the rotation angle θ of the torque rod 49 transmitted by the connecting bar 53 is read by the potentiometer 5.

In step 2, the change H in vehicle height is calculated according to the following equation based on the length L of the torque rod 49 and the turning angle θ. H = L · sin θ In step 3, the calculation result H is output to the display unit 6 or the like via the input / output interface 16.

Therefore, the vehicle height H as the distance between the axle housing 41 and the vehicle body frame 45, which are arranged apart from each other, is measured based on the turning angle θ of the torque rod 49. The vehicle height H can be accurately measured without being affected by the Bane constant or the like due to the direct measurement of the stroke amount of the spring or the like.

[0013]

[Effect of device]

 As described above, the present invention has a spring interposed between the axle housing to which the wheels are attached and the vehicle body frame, one end rotatably fixed to the vehicle body frame and the other end attached to the axle housing. In the vehicle including the torque rod, the angle detection device for detecting the rotation angle of the torque rod is provided on the body frame, and the height of the body frame is obtained based on the rotation angle. Since the configuration is adopted, there is an effect that the vehicle height can be measured with sufficient measurement accuracy.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the attachment of the potentiometer of the above embodiment.

FIG. 3 is a flowchart for explaining the operation according to the embodiment.

[Explanation of symbols]

 1 Vehicle height measuring device main body 5 Potentiometer 41 Axle 45 Body frame 49 Torque rod 53 Connecting bar

Claims (1)

[Scope of utility model registration request] 1. A spring, which is interposed between an axle housing to which wheels are attached and a vehicle body frame, and a torque rod whose one end is rotatably fixed to the vehicle body frame and the other end is attached to the axle housing. In the vehicle configured as described above, a vehicle height measuring device that is provided with an angle detection device that detects a rotation angle of the torque rod on the body frame, and obtains the height of the body frame based on the rotation angle.