JPS5935789Y2 - Attachment for measuring shaft deflection of brake dynamometer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment for measuring the deflection of the shaft of a brake dynamometer, and more specifically, it is useful when measuring the amount of deflection of the shaft of a brake dynamometer to which a brake to be subjected to a braking test is attached. This invention relates to an attachment for measuring deflection.

Generally, a brake dynamometer is used to perform braking tests on the brakes of various types of automobiles. For example, a dual brake dynamometer 1 is constructed as shown in FIG. 1.

That is, a rotary drive device 4 such as a DC motor and a flywheel 5 are mounted and fixed on the base 2, and the rotary drive device 4 and the flywheel 5 are interlocked and connected via a coupling 3. On the outer end side of each axis 6° γ, torque meters 8 and 9 are arranged facing each other and fixed on mounting tables 10 and 11, respectively.

Then, a coupling 15.15 for attaching the fixed side (lining or pad) of the brake under test 14.14 is appropriately attached to the shaft 12.13 of each torque meter 8, 9, and the button is pressed. Couplings 16, 16 for attaching the rotary side (drum or disc) of the brake under test 14 are suitably mounted on the shafts 6, 1 of the rotary drive device 4 and the flywheel 5.

Here, each axis 6.71 on which the brake under test 14 is attached is
- and 12,130 strength (the amount of deflection at the end of the shaft) has a great influence on brake braking tests, so it is considered essential to measure the amount of deflection.

Conventionally, when measuring the deflection of a shaft, as shown in FIG. A load cell 18 for load measurement was placed at the bottom of one end of the test bar 17, and a jack 19 was placed at the bottom of the other end, and the jack was operated to attach the coupling 15 to the shaft. An upward load was applied to the test bar 13, and the amount of deflection of the shaft 13 due to the applied load was measured using a dial gauge 20 that was in contact with the test bar 11.

Note that 21.22 indicates the load cell 18. A block for mounting the jack 19 and a stand for supporting the dial gauge 20 are indicated by 23.

Therefore, when measuring the deflection of each axis, test bar 17. A jack 19, blocks 21, 22, etc. had to be prepared, and the deflection had to be measured for each axis.

For example, in the case of a dual brake dynamometer, there are as many as four axes to be measured, which requires a great deal of effort and time for setup work.

Furthermore, the load applied to the shaft was only applied in a direction different from the load applied to the shaft during the brake braking test.

The present invention was developed in view of the above-mentioned problems, and its purpose is to link each axis so that the deflection of the axes that press the brake dynamometer can be measured at the same time, and also to perform brake braking tests. To provide an actment for measuring deflection, which can apply a load in the same direction to each axis as the load applied by pressing a button.

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

What is shown in FIGS. 3 and 4 is an attachment 24 for measuring shaft deflection according to the present invention, which is composed of a disk-shaped fixed side attachment 25 and a rotating side attachment 26 that forms a pair with this fixed side attachment 25. ing.

The fixed side attachment 25 is a brake attachment 21 (for attaching the fixed side of the brake 14 to be tested).
(see Fig. 5) via fasteners such as bolts (not shown), and its outer end surface has a plurality of female screw holes 28 in the circumferential direction into which the fasteners are screwed. They are drilled at appropriate distances.

An engagement groove 29 in the axial direction (horizontal direction in FIG. 3) is formed on the outer peripheral surface of the fixed side attachment 25, and this engagement groove 29 is used for transmitting torque. A connecting member 30 that can freely come into contact with the side surface of a connecting member of a rotating side attachment 26, which will be described later, has its tip protruded toward the inner end side (the left end side when pressing the button in Fig. 3), and has a plurality of bolts (
(not shown).

On the other hand, the rotation side attachment 26 is constructed almost in the same way as the fixed side attachment 25 described above, and can be attached to and removed from the second brake attachment 31 (see Fig. 5) to which the rotation side of the brake under test 140 is attached. A plurality of female screw holes 32 into which bolts (not shown) for attaching to the brake attachment 31 are screwed are bored at appropriate intervals in the circumferential direction on the outer end surface thereof. has been done.

Further, an axial engagement groove 33 is bored in the outer periphery of the rotating side attachment 26, and a button is provided in the engaging groove 33 so as to come into contact with the side surface of the connecting member 30 of the stationary side attachment 25. A connecting member 34 with a protruding tip is fixed as appropriate.

Furthermore, each engagement groove 29, 33 is provided at the same position as the position where the braking force is applied to the brake that is subjected to the braking type test, and each of the brake attachments 27, 31 is appropriately attached to a coupling attached to a shaft end button of a torque meter, a flywheel, or a shaft end of a one-rotation drive device, as will be described later.

The operation of measuring the deflection of the shaft end to which the brake of a conventional dual brake dynamometer is mounted will be described using the shaft deflection measurement attachment 24 having the above configuration, as shown in FIG.

In addition, the dual brake dynamometer 1 shown in FIG.
is the dual brake dynamometer 1 shown in Figure 1.
Since the structure is almost the same as that shown in FIG.

1. One end of the arm 8a of one torque make 8 (the sixth
The set bolt 35 is screwed into the lower end (button in the figure), and a block (not shown) against which the lower end of the set bolt 35 abuts is provided at one end F.

Next, as shown in FIG. 7, the other end (upper end in FIG. 6) of the arm 9a of the other torque make 9 is screwed into the set bolt 36, and the lower end of the set bolt 36 is brought into contact with the lower end of this other end. A load measuring device 37 such as a loop gauge or a load cell is provided.

At the same time, the fixed side attachment 25 was attached to the brake attachments 2γ and 21 attached to the shafts 12 and 13 of each torque meter 8 and 9, and the fixed side attachment 25 was attached to the rotation and drive device 4 button and the axis 6° 1 of the flywheel 5. The rotation side attachment 26 is attached to each of the brake attachments 3L31.

Then, the connecting member 30°34 of each attachment is connected to the sixth
Attach them so that they are facing toward the same side and touching each other as shown in the figure.

After connecting the torque meters 8 and 9 with the rotation 1 drive device 4 and the flywheel 5 via the shaft deflection measuring attachment 24 as described above, each fixed side and movable side attachment are connected as shown in FIG. ) The dial gauge 20 is brought into contact with the lower outer periphery of 25 and 26 or the lower outer periphery of each brake attachment 2γ, 31.

Then, the set bolt 35 of the arm 8a of one torque meter 8 is turned in an appropriate direction and its lower end is pressed against the block.

Therefore, the shaft 12 of one torque meter 8 and the shaft 6 of the rotary drive device 4 with the attachment hook 1249 for shaft deflection measurement.
Coupling 3. The shaft 7 of the flywheel 5 and the shaft 13 of the other torque meter 9, which are connected via the shaft tower □ measuring attachment 24, are rotated counterclockwise by pressing the button in FIG. 1, and the torque is used for load measurement. Measured by the device 31.

Therefore, due to the torque generated by the set bolt 35 screwed into one end of the arm 8a of one torque meter 8, each shaft 6. The kwami amount of rJ, - and 12, 13 is
Measurements are taken simultaneously via each dial gauge 20.

FIG. 9 shows a case where the attachment 24 for measuring the shaft deflection according to FURU 4VC is used in a single brake dynamometer. A measuring bar 38 is appropriately attached to the coupling 3, and a block (not shown) and a self-connecting set bolt are attached to the tip of the measuring bar 38, similar to the torque meter 8 in the above-described embodiment. 39 is screwed in.

The fly 7j key wheel 5 and the torque meter 9 are connected via an attachment 24 for measuring shaft deflection.

Therefore, the axial deflections of the axes T and 13 of the flywheel 5 to which the brake under test 14 to be subjected to the braking test is attached and the torque meter 9 can be measured simultaneously.

Just like on the ground, the present invention has five fixed side attachments that are useful for attaching and detaching the brakes under test to the brake dynamometer at the end of each shaft where the brake under test is attached, and is also formed into a disk shape. Since connecting members that can come into contact with each other are attached to the outer circumferential surface of the side 5 rotation side attachment, the deflection of each shaft end to which the brake under test is attached, which can be pressed on the brake dynamometer, must be measured at the same time. I can do it.

Further, since a load can be applied to each shaft end in the same direction as the load generated during a brake test, the deflection of the shaft can be accurately measured.

In the above-mentioned embodiments, the case in which the shaft tower □ measurement attachment sound was used for dual brake dynamometers and single brake dynamometers was described in detail, but it can also be used for quadruple brake dynamometers. Of course.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view of a conventional dual brake dynamometer for measuring the amount of shaft deflection when the two buttons are pressed, and FIG. 2 is an enlarged view taken along the line ■-■ in FIG. Fig. 3 is a front explanatory view of the shaft deflection measuring attachment according to the present invention, Fig. 4 is a view taken along the line Th7-IV in Fig. 3, and Fig. 5 is a diagram showing the shaft deflection measurement attached to each brake attachment. Fig. 6 is a plan view of a dual brake dynamometer connected with the shaft deflection measurement attachment according to the present invention, and Figs. FIG. 9 is an explanatory plan view when an attachment for measuring shaft deflection is attached to a single brake dynamometer. 25... Fixed side attachment, 26... Rotating side attachment, 30, 34... Linking member.

Claims (1)

[Scope of utility model registration request] A moon-shaped fixed side 5 rotation side attachment 25° 26 is provided removably at each shaft end on which the brake under test is attached to the brake dynamometer, and is formed into a disk shape. Attachment 2
Connecting member 30.3 that can freely come into contact with the outer peripheral surfaces of 5 and 26
An attachment for measuring shaft deflection of a brake dynamometer, characterized in that it is equipped with a brake dynamometer.