JPS592337B2 - Fatigue test equipment for rotating shaft equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fatigue testing device for a rotating shaft device that tests the durability of a rotating shaft and a bearing in an assembled state.

Conventionally, automobile parts, such as axles and bearings, have been tested individually for durability, which has been inefficient and has the problem of not being able to detect the weakest part in an assembled state.

The present invention is symmetrical to the above problem, and is a fatigue testing device for a rotating shaft device, which comprises a rotating shaft, a rotating shaft support member that supports the rotating shaft, and a bearing that rotatably attaches the rotating shaft to the supporting member. , a drum rotated by a drive device;
A table is installed on the side of the drum so that it can rotate horizontally, a moving device is installed between the table and the foundation, and a table is installed on the table so that it can be tilted vertically. a mounting frame for a rotating shaft device, and a lifting drive that tilts the mounting frame and the rotating shaft device attached to the mounting frame in the vertical direction and presses a wheel fixed to one end of the rotating shaft against the drum; a vertical load cell interposed between the lifting drive mechanism and the mounting frame, and a vertical load cell that presses the other end of the rotating shaft on the side opposite to the wheel toward one end on the wheel side, a lateral load applying mechanism that applies a lateral load; a first lateral load detector interposed between the rotational center axis of the drum and the foundation; and a side opposite to the wheel of the lateral load applying mechanism and the rotating shaft. A fatigue test device for a rotating shaft device characterized by comprising a second lateral load detector interposed between the other end and the other end, the purpose of which is the same as that of the rotating shaft. Fatigue durability of the entire rotating shaft device made up of these parts, which cannot be obtained by individually testing the rotating shaft support member that supports the rotating shaft and the bearing that rotatably attaches the rotating shaft to the supporting member, The object of the present invention is to provide a fatigue testing device for a rotating shaft device that can efficiently test the weakest part.

The fatigue test device for a rotary shaft device of the present invention is constructed as described above, and a wheel is fixed to one end of the rotary shaft of the rotary shaft device, the rotary shaft device is mounted on a mounting frame, and a lift drive mechanism is used. The wheel is pressed onto the drum and tilted vertically to apply a vertical load to the rotating shaft (this load is detected by a vertical load detector, and the other end of the rotating shaft opposite to the wheel is detected by a lateral load applying mechanism). Press the part toward one end of the wheel side,
At this time, the reaction force at the other end of the rotating shaft on the side opposite to the wheel is detected by the second lateral load detector, and the table is rotated horizontally to cause the wheel to skid sideways against the drum. Since the force transmitted to the rotation center axis of the drum is detected by the first lateral load detector, the rotation shaft, a rotation shaft support member that supports the rotation shaft, and a bearing that rotatably attaches the rotation shaft to the support member are connected. It is possible to efficiently test the fatigue durability and weakest part of the entire rotating shaft device made up of these parts, which cannot be obtained by testing each part individually.

Next, the fatigue test device for a rotating shaft device of the present invention will be specifically explained using an embodiment shown in FIGS. 1 to 6.
1a to 1d in Fig. 3 are the foundations, 2 is a table support stand installed on the same foundation 1a, 4 in Figs. 5 is a bracket fixed to the right edge of the table 4, and 6 is a fluid pressure cylinder device (a moving device for the table 4) installed between the bracket 5 and the foundation 1d. ), when the cylinder device 6 is operated in the contraction direction, the table 4 rotates counterclockwise from the position shown in FIG. 2 about the vertical axis 3, and when the cylinder device 6 is operated in the extension direction, The table 4 is adapted to rotate clockwise about the vertical axis 3 from the position shown in FIG. Further, 7 and 7 are pillars erected at both corners of the right edge of the table 4, and 8 is each pillar 7.
A rotating shaft installed between the upper ends, 9, 9 = links of the same length whose ends are fixed to both ends of the rotating shaft 8, 10 a connecting rod installed between each link 9, 11, 11 = a link having an upper end pivotally connected to the other end of each link 9; a link 9 having one end pivotally connected to the lower end of each link 11;
Links 9 of the same length, 13, 13, which pivotally connect the other end of each link 12 to both corners of the left side edge of the table 4, are integral with the front and rear parts 16, 16, and the left and right parts. 17,17
and a mounting frame 14, 14 is the front and rear part 16, 16
pins 18, 18, which pivot the left and right center portions of the links 11, 11 to the vertical center portions of the links 11, 11;
Bracket fixed to the center part in the front and rear direction of 7, the first, third,
In Figure 4, 19 and 20 are pillars installed in the center of the table 4, 23 is an L-shaped lever with a large lever ratio pivoted on the pillar 19, and 24 is a lever ratio pivoted on the support shaft 20. small L-shaped lever,
21 is a fluid pressure cylinder device provided between one end of the lever 23 and the table 4; 22 is a fluid pressure cylinder device provided between one end of the lever 24 and the table 4; 24 corresponds to the elevating drive mechanism.

Further, 25 is a tension/compression vertical load detector provided between the other end of the lever 23 and the left bracket 18, and 26 is a tension/compression vertical load detector provided between the other end of the lever 24 and the right bracket 18. The hydraulic cylinder devices 21 and 22 are actuated in the extension direction using the same vertical load detector provided, and the movement is transmitted to the mounting frame 15 via the levers 23 and 24 and the vertical load detectors 25 and 26. is lowered from the two-dot chain line position in FIG. One end of the rotating shaft 39a of the rotating shaft device 37 consisting of shafts (axles) 39a, 39b and bearings (taper roller bearings) 41, 42 for rotatably supporting and mounting the rotating shafts 39a, 39b in the support member 38. The wheels 43 fixed to the frame 15 are brought closer to the rotating drum 32, and then the hydraulic cylinder device 21 is operated in the extension direction, and at the same time, the fluid pressure cylinder device 22 is operated in the contraction direction, so that the left side of the mounting frame 15 is lower than the right side. The specimen mounting frame 15 is tilted around the pin 14 so as to be lower, the wheel 43 is brought into contact with the rotating drum 32, and a vertical load is applied to the vertical load detectors 25 and 26, and a camber angle is given to the wheel 43. When the mounting frame 15 is lowered as described above, the pin 14 is lowered along the vertical axis (see A in FIG. 4) by the action of the Wat link mechanisms 7 to 13, and is mounted from the link 11. No horizontal force is applied to the frame 15. It should be noted that the mounting frame 15 needs to be supported in such a way that it can be lifted and lowered and tilted in the vertical direction about the longitudinal axis (pin 14) passing through the center of the mounting frame 15. By using , the I support mechanism can be simplified. The angle error of the vertical load detectors 25 and 26 (see θ and θ″ in FIG. 4) when the mounting frame 15 moves up and down can be reduced. It is easy to control one corner of the camber. However, the support mechanism The example is not limited to this example. Also, 27 in Fig. 2.3 is the motor installed on the foundation 1a, and 28 is the motor 27 installed on the foundation 1a.
Pulleys 45, 45 fixed to the output shaft of the foundation 1a
The drum support stands 33, 33 installed above are the same support stands 45.
Among the bearings mounted above, the bearing 33 has extremely low friction in the axial direction, such as a low-friction bearing (static pressure bearing). Further, 31 is the rotational center axis of the drum rotatably supported by the same bearings 33, 32 is the drum fixed to the same rotational center shaft 31, 30 is the pulley fixed to the same rotational center shaft 31, and 29 is the same pulley 30. A belt 34 stretched between the pulley 28 is a first lateral load detector installed between the drum shaft 31 and the foundation 1b, and when the motor 27 is started, the rotation of the belt 34 is connected to the pulley 28 The power is transmitted to the rotating drum 32 via the pulley 30 and the drum shaft 31, causing the drum 32 to rotate. Also, 35 in Figure 1
is a fluid pressure cylinder device (lateral load applying mechanism) attached to the right edge of the table 4, and 36 is a second lateral load detector provided between the cylinder device 35 and the axle 39b. As already mentioned, the rotating shaft device 37 includes a rotating shaft supporting member (
an axle housing) 38, a rotating shaft (axle) 39a, 39b equipped with a thrust block 40, and the rotating shaft 39
a, 39b are rotatably mounted in the support member 38 (taper roller pairing) 41, 42, the rotating shaft 39a has a wheel 43 fixed to one end thereof, and the bearing 41 The bearings 42 share and support the lateral load acting in the direction of arrow B (toward the other end) in the figure, and the lateral load acting in the direction of arrow C (toward the one end) in FIG. 6, respectively. Of these, the former lateral load is obtained by causing the wheels 43 to skid sideways on the rotating drum 32;
Since there are no wheels at the other end of the specimen 37, the latter lateral load cannot be obtained in the same way. In this test equipment,
The fluid pressure cylinder device 35 is actuated to apply a lateral load acting in the direction of arrow C to the axle 39b. In addition, as shown in FIG. 5, in the above embodiment,
The vertical axis 3, which is the axis of rotation of the table 4, passes through the center of the drum 32 in the width direction, extends in the vertical direction, and does not coincide with the center line located on a plane perpendicular to the axis of the drum 32, so the vertical axis 3 in FIG. As shown, when the table 4 is rotated by an angle θ5'', the contact point of the wheel 43 is shifted by D from the center line, so the downward pressing force of the wheel 43 is no longer directed toward the axis of the drum 32. Since there is a problem that vertical and lateral loads cannot be measured accurately, it is preferable to arrange the vertical axis 3 so that it coincides with the center line of the drum 32.Next, the operation of the rotary bending fatigue testing device is as follows. First, a wheel is fixed to one end of the rotating shaft 39a of the rotating shaft device 37, this rotating shaft device 37 is mounted on the mounting frame 15, and the wheel 43 is moved to the drum 32 by the lifting drive mechanisms 21 to 24.
By pressing it upward and tilting it in the vertical direction, the rotating shaft 39
a, 39b in the direction of the upper and lower blades, this load is detected by the vertical load detectors 25, 26, and the lateral load applying mechanism 35 transfers the other end of the rotating shafts 39a, 39b on the opposite wheel side to one end on the wheel side. At this time, the rotating shaft 39a,
The reaction force at the other end on the opposite wheel side of 39b is detected by the second lateral load detector 3.
6, the table 4 is rotated horizontally to cause the wheel 43 to skid sideways on the drum 32, and the force transmitted from this wheel 43 to the rotation center axis 31 of the drum 32 is detected by the first lateral load detector. Detected by 34. Therefore, a rotating shaft device consisting of these parts cannot be obtained by individually testing the rotating shaft, the rotating shaft support member that supports the rotating shaft, and the bearing that rotatably attaches the rotating shaft to the supporting member. It has the effect of efficiently testing the overall fatigue durability and the weakest part.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the rotary bending fatigue testing apparatus according to the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG.
5 is an explanatory view showing the relationship between the rotary drum and wheels, and FIG. 6 is a longitudinal side view showing an example of the specimen. 1a to 1d...Foundation, 4...Table, 6...Driving device for table 4, 15...
...Mounting frame, 21-24...Elevating drive mechanism, 2
5, 26... Vertical load detector, 34...
- First lateral load detector, 35... Lateral load applying mechanism, 36... Second lateral load detector.

Claims (1)

[Claims] 1. In a fatigue testing device for a rotating shaft device consisting of a rotating shaft, a rotating shaft supporting member that supports the rotating shaft, and a bearing that rotatably attaches the rotating shaft to the supporting member, a drum rotated by a drive device, a table disposed on the side of the table so as to be horizontally rotatable; a moving device disposed between the table and the foundation; and a rotating table disposed above the table so as to be tiltable vertically. a lifting drive mechanism that vertically tilts a mounting frame for a shaft device and the rotating shaft device attached to the mounting frame and presses a wheel fixed to one end of the rotating shaft against the drum; , a vertical load meter interposed between the lifting drive mechanism and the mounting frame, and the other end of the rotating shaft on the side opposite to the wheel is pressed toward one end on the wheel side, and a lateral load applying mechanism that applies a load; a first lateral load detector interposed between the rotation center axis of the drum and the foundation; and the other end of the lateral load applying mechanism and the rotating shaft on the side opposite to the wheel. 1. A fatigue testing device for a rotating shaft device, comprising: a second lateral load detector interposed between the rotating shaft device and the second lateral load detector.