JP3030819B2 - Brake and speedometer combined test equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined test apparatus for a brake and a speedometer, and particularly to smoothly perform a test of a brake and a speedometer of a vehicle simply by setting the vehicle at a predetermined position. The present invention relates to a combined test device for a brake and a speedometer that can perform the test.

"Conventional technology" Conventionally, independent testing of brakes and speedometers for automobiles and other vehicles required the use of an independent brake tester and speedometer tester. Sex was bad. For this reason, for example, in Japanese Utility Model Publication No. 55-25390, a driving roller connected to a power source via a one-way clutch and a pair of side-by-side rollers with side-by-side idle rollers are used, and tires are mounted on the pair of side-by-side rollers. Later, in the speedometer test, the drive roller is separated from the power source by a one-way clutch and used as a driven roller, and the idle roller side detects the tire rotation speed, while in the brake test it is driven by the one-way clutch After connecting the roller and the power source and driving and rotating the drive roller, by stepping on the foot brake, the slip ratio between the tire and the drive roller is measured using a torque gauge or other measuring device provided on the drive roller side. There has been proposed a composite test apparatus configured to perform detection.

However, such a test apparatus effectively makes use of the one-way clutch switching means so that one drive roller also functions as a driven roller, thereby using a common roller to function as a brake tester and also as a speedometer. However, it is undeniable that using a common roller pair for different tests lowers the accuracy as compared with the case of a dedicated tester.

That is, in the case of a speedometer, it is preferable that the rollers have the same diameter and a roller of a certain large diameter is arranged horizontally and in parallel. On the other hand, in the case of a brake tester, an auxiliary roller (idle roller)
By making the diameter smaller and arranging the predetermined inclination angle more accurately, a test can be performed with high accuracy. However, when the rollers are commonly used as described above, the above-described configuration is impossible.

In order to solve such a drawback, the detection roller pair and the brake roller pair can be arranged alternately.
In this case, one roller disposed between the other roller pair hinders the smooth contact between the other roller pair and the tire, and the test cannot be performed in a complex manner.

Therefore, it is possible to arrange one or a plurality of rollers arbitrarily selected among the above-mentioned roller pairs so as to be able to swing up and down, so that the roller located therebetween can be lowered for each corresponding test.

However, in the brake test, the slip ratio between the tire and the drive roller generated when the foot brake is depressed is set at a position radially away from the drive roller by a predetermined distance for torque detection. Since it is configured to detect using a load cell or the like, when the drive roller for the brake test is configured to swing freely without being fixed as described above, the frictional force generated when the foot brake is depressed is extremely small. Since the direction of the force line is a horizontal approximation direction orthogonal to the swinging direction of the roller, the driving roller easily swings due to the frictional force and is applied to the load cell for torque detection. The applied pressure fluctuates, and accurate brake measurement cannot be performed.

The present invention has been made in view of the above-described drawbacks of the related art, and has as its object to provide a combined speedometer / brake test apparatus capable of performing accurate brake measurement even when a brake roller is disposed between a pair of detection rollers so as to be able to move up and down. .

"Technical means for solving the problem" The present invention uses a side-by-side roller pair in which a drive roller connected to a power source via a one-way clutch and an idle roller are arranged in order to achieve such a technical problem. In a combined testing apparatus for testing a brake and a speedometer by installing a tire on the pair of juxtaposed rollers, at a position forward of the driving roller 1 in a vehicle entry direction,
The pair of fixed shafts 40 and 45 are arranged so that a line connecting the axes of the pair of fixed shafts runs in the vertical direction, and a parallelogram-shaped link mechanism 11- having a fixed side between the fixed shafts 40 and 45. The first feature is that the drive roller 1 is configured to be swingable up and down by the link mechanism 11-15-16, and the second feature is that the link mechanism 11-15 is provided. -16, a detector 17 for detecting a torque value at the time of a brake test is provided on a vertical side 15 parallel to the fixed side located on the drive roller 1 side.

In this case, since one of the fixed shafts 40 is formed by the detection roller shaft 40 positioned forward in the vehicle entry direction, space can be saved without providing an independent fixed shaft mounting portion.

According to the technical means, the link mechanism 11-15-16 for swinging the drive roller 1 is mounted on the fixed side 40-45 extending in the vertical direction with its position regulated,
The driving roller 1 supported by the even part of the vertical side 15 parallel to the fixed side 40-45 can be moved only in the vertical direction, and the detector for detecting the torque value at the time of the brake test is a fixed side. Since it is attached to the vertical side 15 whose position is regulated in a direction other than the vertical direction by 40-45, even if the frictional force generated when the foot brake is depressed during the brake test is large, the direction of the line of force is as described above. Since the horizontal approximation direction is orthogonal to the roller movement direction, the vertical side 15 does not swing due to the frictional force.

Therefore, by attaching a torque detector to the vertical side 15, the detector can accurately measure the torque value of the drive roller 1 corresponding to the tire slip ratio.

In the preferred embodiment of the present invention, the link mechanism 11
The cylinder 12 is positioned at or near the position connecting the lower fixed shafts 40 and 45 on the diagonal line of −15−16 and one axis of the drive roller.
The link mechanism 11-15-16 can be displaced by the reciprocating operation of the cylinder 12 so that the cylinder
Numeral 12 functions as a reinforcing agent (the parallelogram is a combination of two triangles).

"Example" Hereinafter, an example of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Not just.

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 2 to 5 show tire testers in which the detection roller pairs 4, 5 and the brake roller pairs 1, 2 and the anti-projection roller 6 are alternately juxtaposed and incorporated, as shown in FIG. Inspection table 3 with a unit 10/20 incorporating a pair of left and right tire testers 10A, 10B, 20A, 20B
In addition, one unit body is configured to be movable back and forth using a screw shaft so that the unit body 10/20 is located at a predetermined position of the corresponding tire 3 of the vehicle to be inspected. To be configured.

As shown in FIGS. 2 to 4, the testers 10A, 10B, 20A, and 20B are connected to the cylinder 12 when the speedometer is detected.
The brake roller 1 is lowered using
The detection roller 5 located in the middle is raised to
The brake rollers 1 and 4 are arranged side by side on the same plane, while the brake roller 1 is raised and the detection roller 5 located therebetween is lowered during a brake test.

Next, the assembling structure of the rollers will be described. The detecting roller 4 is supported at a predetermined position by a shaft 43 supported by a frame 41 via a bearing 44, and is linked to the vehicle exit side of the shaft 43. Roll-out prevention roller 6 via plate 61
And a brake roller 1 on the rear side via a link plate 11.
However, further behind it, other detection rollers 5 are attached via a link body 51 so as to be swingable, and all are attached between the link plates (body) 11, 51, 61 and the base 42. The cylinders 12, 52, 62 move up and down by moving up and down, and can be positioned and fixed at a predetermined position.

Behind the detection roller 5, an auxiliary roller 2 is provided with a shaft 2a.
To be rotatably supported.

The auxiliary roller 2 has one end of a first link 21 that rotates about a support shaft 21a due to the reciprocating motion of a horizontal cylinder 24, and the other end 21b of the link has a base end side of an arm 23. A pivotally supported second link 22 is pivotally supported.

The arm 22 is pivotally supported on a fixed portion 24a of the horizontal cylinder 24 so as to be pivotable, and a vertical cylinder 25 having a base end fixed to a base 42 is attached to a free end thereof.

The two cylinders 24 and 25 have built-in encoders 26 and 27 for detecting the amount of advance and retreat, respectively.
By moving the two cylinders 25 back and forth based on the signal of 27, as shown in FIG. 2, the cylinders 25 are moved along the virtual inclined line TL while maintaining the displacement angle θ corresponding to the outer diameter of the tire 3. Can be done.

On the other hand, brake shoes 53, 63 urged in the separating direction by springs 54, 64 are attached to the link body 51 at positions facing the respective detection rollers 4, 5, and by the lowering operation of the prevention roller 6 and the auxiliary roller 2, Detection roller against the spring force
It is configured to be able to press and lock 4 and 5.

As shown in FIGS. 1 and 2, the brake roller is a link mechanism 11-15 that can be displaced by the expansion and contraction of the fluid cylinder 12.
It is configured to be able to move up and down in the vertical direction by -16.

The fluid cylinder 12 is provided with a fixed shaft 45 via a bracket 45A at an intersection of a vertical line passing through the axis 10 of the fixed detection roller 1 and the base 42a via a bracket 45A.
Both ends are supported by one end 11a of the link body 11 near the shaft 10.

The link mechanism 11-15-16 is a first link body 11 that swingably connects the fixed detection roller shaft 10 and the drive roller 1.
A second link body 15 having the same axial length as the distance between the fixed detection roller shaft 10 and the fixed shaft 45, and having one end pivotally supported on the drive roller 1 shaft 10; A third link body 16 having the same axial length as that of the second link body 11 and swingably connecting between the other end of the second link body 15 and the fixed shaft 45; Since the fixed detection roller shafts 10 are in a fixed state, a parallelogram-shaped link mechanism connecting the shafts 40-45 and the link bodies 11-15-16 is formed.

As a result, since the fixed detection roller shaft 10 and the fixed shaft 45 are fixed, the second link body 15 is vertically displaced in accordance with the expansion and contraction operation of the fluid cylinder 12, and follows the displacement. As a result, the drive roller shaft 10 is also raised and lowered vertically.

The fluid cylinder 12 and the first link body 11 are disposed between the bearing 44 and the roller 1 as shown in FIG.
The link body 15 and the third link body 16 are located outside the bearing 44 and need not necessarily be mounted at the same cross-sectional position.

A gear box 13 is attached to the drive roller 1 shaft, and the rotational force of the motor 14 fixed to the side plate 46 attached to the side surface of the gear box 13 is reduced to be transmitted to the drive roller 1 side while being reduced. It is configured to be.

Further, the side plate 46 is provided with a buffer spring 47 between itself and the link body 15 below to absorb the vibration of the motor 14, and the load cell 17 is further mounted below the side plate 46 to form the second link body.
The torque value of the drive roller 1 corresponding to the slip ratio of the tire 3 can be precisely formed via the reference numeral 15.

 Next, the operation of this embodiment will be described.

First, the detecting rollers 4 and 5 are pressed against the springs 54 and 64 by the lowering operation of the prevention roller and the auxiliary roller 2 to lock them, and the brake roller 1 and the detecting roller 5 are raised.
It is placed on the same plane as the fixed detection roller 4.

Thereby, since the detection rollers 4 and 5 do not run idle, each roller is located on substantially the same plane,
The vehicle can smoothly enter.

Next, after the prevention roller 6 and the auxiliary roller 2 are lifted to unlock the detection rollers 4 and 5, the brake roller 1
Is lowered and the tires are placed on the pair of detection rollers 4 and 5, and then the driving wheels (tire 3) are rotated by the driving force of the vehicle itself.
The motor rotates following the drive wheel, and the rotation is detected by a rotation detector (not shown), and the speedometer is checked.

Next, at the time of the brake test, the brake roller 1 is moved upward by the movement of the cylinder 12 so as to be located slightly above the fixed detection roller 4, and the swing detection roller 5 is lowered by expanding and contracting the cylinder 52. The roller 2 is moved along the virtual inclined line TL corresponding to the outer diameter of the tire 3 while maintaining the deflection angle θ by controlling the forward and backward movement of the two cylinders 22 and 24 based on the signal of the encoder 26/27. .

As a result, the tire 3 is placed between the brake roller 1 and the auxiliary roller 2, and in this state, the brake roller 1 is driven via the motor 14 and the speed reducer 13, and then the foot brake is depressed. The slip ratio between the vehicle and the brake roller 1 can be grasped by the load cell 17 as the torque displacement thereof via the second link body.

After completion of the measurement, the prevention roller 6 and the auxiliary roller 2
The lowering operation causes the detecting rollers 4 and 5 to be pressed against each other against the force of the springs 64 and 54 to lock them, and at the same time, the brake roller 1 and the swing detecting roller 5 are raised and then the vehicle is retreated.

[Effects] As described above, according to the present invention, even in the case of a vehicle composite test apparatus in which a brake roller is arranged to be able to move up and down between a pair of detection rollers, the position of the brake roller is restricted and it is possible to move only in the vertical direction. With this configuration, accurate brake measurement can be performed without causing the brake roller to swing even by an impact force during a brake test.

 And so on.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention.
FIG. 2 is a plan view of the entirety, FIG. 2 is a front view showing the tire tester portion, FIG. 3 is a plan view thereof, FIG. 4 is a front view of a main part thereof, and FIG. It is a principal part front view which shows the relationship.

Continuation of the front page (72) Inventor Yasuhiro Kawaguchi 155-8 Nagabushi, Mishima-shi, Shizuoka Maruzen Kogyo Co., Ltd. (56) Reference Literature 4-8936 (JP, U) (58) Field surveyed (Int. Cl ^7, DB name) G01M 17/00 -. 17/007 G01L 5/28 G01P 21/02

Claims (3)

(57) [Claims] A drive roller connected to a power source via a one-way clutch and a pair of juxtaposed rollers in which idle rollers are juxtaposed, and a tire is mounted on the juxtaposed roller pair to test a brake and a speedometer. In the combined test device to be performed, the pair of fixed shafts are arranged at a position forward of the drive roller in the vehicle entry direction so that a line connecting the axes of the pair of fixed shafts runs along the vertical direction, and the fixed shafts are fixed. A parallelogram link mechanism is provided as a side, the drive mechanism is configured to be swingable up and down by the link mechanism, and a brake test is performed on a vertical side parallel to the fixed side located on the drive roller side. A combined test apparatus for a brake and a speedometer, comprising a detector for detecting a torque value of the brake. 2. The composite test apparatus according to claim 1, wherein one of the pair of fixed shafts is a detection roller shaft located forward in the vehicle entry direction. 3. A cylinder is mounted at a position connecting a lower fixed shaft, which is located on a diagonal line of the link mechanism, and a drive roller shaft or in the vicinity thereof, and the link mechanism is configured to be displaceable by advancing and retracting operation of the cylinder. ).