JPS6145370Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is suitable for a rotating shaft joint for connecting the above-mentioned two systems, where the distance from the driven system changes due to various changes in the drive system, especially for a split type rotating shaft joint. This invention relates to a rotating shaft retaining device. The above-mentioned rotating shaft joint is suitable for temporarily connecting engines (drive systems) of different sizes to a stationary dynamometer (driven system) in, for example, engine bench tests. When this was done, it was customary to interpose a connecting device called a "dummy transmission" between the engine and the dynamometer. As shown in Fig. 1, the dummy transmission is rotatably supported by a clutch housing 1 that houses a clutch C attached to a flywheel housing H of an engine E, and has a tip attached to the clutch C and a rear end attached to the clutch housing H. are composed of rotating shafts 2 each connected to a dynamometer D by a flange,
The distance L between the mounting surface H1 of the clutch housing ₁ to the flywheel housing H and the front end 21 of the rotating shaft 2 is determined by the model of the clutch C, so if the model of the engine E is changed, for example, the flywheel Since the thickness FL and HL of the wheel F or the same housing H will change, the length will not match with the existing rotating shaft and it will no longer be possible to mount it. Therefore, conventionally, in such cases, the entire dummy transmission to match the engine was changed, but this required preparation of a dummy transmission only for the type of engine, which was very inconvenient in terms of management such as storage space. Yes, and the cost is also high. To solve this problem, there is a split rotary shaft joint that can be used even if the type of engine changes by simply replacing the rotary shaft in the dummy transmission. The above-mentioned joint connects the connecting means (the tip 61 of the intermediate shaft 6, male splines 62, 63, and one end of the small diameter part 64 of the intermediate shaft 6 described later) (61, 62) to the connection mechanism of different drive systems E, C, F. A plurality of types of intermediate shafts 6 corresponding to C and H are rotatably supported by the support member 1, one end is connected to the driven system D, and the other end of the intermediate shaft (63, 64) is fitted and disengaged. connection means (shaft hole 41 and spline portion 4 described later)
2) and a retaining device 7, and by selecting the intermediate shaft 6 according to the type of drive system E, C, F, the intermediate shaft 6' can be driven by different types. The systems E, C, and F are connected to the driven system D. As a result, when driving system E, C, and F are different types while leaving driven system D as is, drive system E
Alternatively, the support member 1 fixed to the component H is removed from the drive system E or the H, or the support member 3 is removed from the same member 1, and one end side of the intermediate shaft 6 (the 6
1.62) from the drive system E and C sides, release the retaining device 7 and remove the other end of the intermediate shaft 6 (the 6
3, 64) from the rotating cylindrical member 4, and select the intermediate shaft 6 having one end (61, 62) with a drive side length suitable for the dimensions of the changed drive systems E, F, and then The ends (said 63, 64) are fitted into the rotating cylindrical member 4 and locked by the retainer 7, and the one end (said 61, 62) is supported or supported by the changed drive system E, F, C. What is necessary is to engage and fix the support member 1 or 3 with the drive system E or C, and further connect the rotating cylindrical member 4 with the driven system D. As a result, the changed drive system E is smoothly connected to the driven system D via the rotary shaft joint of the present invention, and the drive system E
Rotation is also transmitted from the drive system D to the driven system D without any problem. By the way, the rotating shaft retaining device in the split type rotating shaft joint that can be divided into the rotating shaft and the rotating body as described above is generally performed by inserting a set pin into a hole drilled in the rotating body toward the rotating shaft, and then tightening the pin with a spring. Since the set pin is simply pressed in the direction of the rotating shaft and its tip is engaged with the rotating shaft, when the rotating shaft and rotating body rotate at high speed, the set pin will move outward against the spring due to centrifugal force. There is a risk that the set pin and the rotating shaft may become disengaged, which is extremely dangerous. For this reason, it is conceivable to strengthen the spring or provide a mechanism to prevent the set pin from escaping, but the former method is heavy when operating the set pin when stopped, and the latter method may cause errors in operation or complicate operation. The present invention aims to provide a rotating shaft retaining device that solves the above-mentioned problems.The structure of the device will be explained with reference to FIG. 3 corresponding to the embodiment. A set pin 71 is pressed by a spring 73 so that its tip engages with the engagement groove 64 and is disposed inside the rotary body 4 into which the rotary shaft 6 can be removably inserted.
1 and the rotating body 4 by centrifugal force .
It has been established. With this configuration, the present invention has a drive system (E,
During the rotation of C and F), the lock mechanism 7 is rotated so that the tip of the set pin 71 is in the locking groove 64 of the rotating shaft 6.
2 locks the set pin 71 and rotating body 4,
When replacing the rotating shaft 6, when the drive system is stopped, if the set pin 71 is in the upper position as shown in the imaginary line in FIG. 73
The rotating shaft 6 can be pulled out by pulling it outward against the force to escape from the engagement groove 64. Here, if another rotating shaft with a different length on the drive system side is inserted again, the set pin 71 is returned by the spring 73, and its tip is inserted into the outer peripheral groove 64, the rotation shaft 6 is removed from the rotating body 4. It is prevented from coming off. This embodiment will be described in detail with reference to FIGS. 2 and 3. Engagement grooves 64 are formed around the ends of the rotating shafts 6 having different lengths, while the rotating shafts 6 have different lengths.
In the rotating body 4 into which the rotating shaft 6 is inserted, a sliding hole 45 is formed approximately at right angles to the rotating shaft 6, corresponding to the position where the engaging groove 64 is located when the rotating shaft 6 is inserted, and a sliding hole 45 is formed at the outside of the hole. A retaining nut 72 used for a lock mechanism 72 having a center hole 72a is attached near the end 44. Note that the retaining nut 72 is not necessarily necessary, and the locking mechanism 72 may be provided directly on the rotating body 4. Reference numeral 71 denotes a set pin, which has a tip 71a, a flange 71c, and a base 71d so as to be inserted into the two holes, that is, the sliding hole 45 and the center hole 72a. The set pin 71 is hung between the edges and urges the set pin 71 toward the engagement groove 64 side. The set pin 71 has the flange 71c.
A locking groove 71b is formed between the locking nut 71 and the base 71d, and a set pin 71 is provided in the retaining nut 72.
When the tip 71a is in the engagement groove 64 of the rotating shaft 6, one end of the locking groove 71b of the set pin communicates with the center hole 72a, and the other end diagonally reaches a plurality of inclined holes near the outside of the locking nut 72. Open 72b, store the ball 74 here, and lock the lock mechanism.
72 is configured. In a rotary shaft joint equipped with such a retaining device, when the engine E rotates, the power is transmitted to the rotary shaft 6 from the spline 62 via the flywheel F and clutch C, and is engaged with the rotary shaft 6 from the rear spline 63. Spline 4 of rotating body 4
2, it is transmitted to the dynamometer D connected to the flange 43 of the rotating body 4. At this time, even if the rotating shaft 6 moves in the axial direction within the rotating body 4 and attempts to come out, the tip 71a of the set pin 71 of the present retaining device 7 fits into the engagement groove 64 of the rotating shaft 6 and maintains its position. Regulate and prevent slippage. That is, the set pin 71 tries to move outward in the sliding hole 45 and the center hole 72a against the spring 73 due to the centrifugal force accompanying the rotation, but the ball 74 in the locking mechanism 72 quickly moves due to the centrifugal force. Move the set pin 71 outward in the inclined hole 72b.
In the lock groove 71b, the set pin 71 is sandwiched between the flange 71c and the outer surface 72c of the inclined hole 72b, and is prevented from moving further outward. Therefore, the set pin tip 71a fits into the engagement groove 6.
There's no getting out of 4. Engine of another model, e.g. flywheel F
When attempting to measure the power of an engine with a different thickness FL in the figure, for example, remove the fixed outer cylinder 3 from the support member 1, and remove the tip 61 of the rotating shaft 6 and the spline 62 from the bearing P and clutch C. After pulling it out, the rotating body 4 and rotating shaft 6 are rotated by hand to position the retaining device 7 on the upper side as shown by the two-dot chain line in FIG. Then, since no centrifugal force acts in this non-rotating state, the set pin 71 is biased by the spring 73 and pressed downward (toward the shaft hole 41), and the ball 74 also separates from the locking mechanism 71b of the set pin and moves into the inclined hole. Roll 72b downward,
Fall. In this state, the set pin 71 is pulled up in the direction shown by the arrow in the figure, its tip 71a is pulled out from the engagement groove 64 of the rotating shaft 6, and the rotating shaft 6 is pulled out from the rotating body 4 in the direction shown by the white arrow. after that,
Rotating shaft 6 with a length compatible with the new engine E
is inserted into the shaft hole 41 of the rotating body 4 while pulling up the set pin 71 in the same manner as described above, and the tip 7 of the set pin
The recombination is completed by fitting 1a into the engagement groove 64 in the same manner as described above. As described above, the shaft slip-off prevention device of the present invention includes a set pin that is pressed by a spring so that its tip engages with the engagement groove in a rotating body into which a rotating shaft having an engagement groove can be removably inserted. At the same time, the rotary body is provided with a locking mechanism that locks the set pin and the rotary body using centrifugal force, so that when the rotation stops, simply inserting and removing the set pin in the radial direction allows the tip of the set pin to connect with the groove of the rotating shaft. It can be released and fixed, and is extremely easy to operate. In addition, the locking device of the present invention is equipped with a locking mechanism that locks the set pin and the rotor using centrifugal force on the rotating body, so that the outward movement of the set pin is reliably stopped, making it safe and highly reliable. This has the effect of providing a retaining device for the rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a conventional rotary shaft joint, FIG. 2 is a vertical cross-sectional view of a rotary shaft joint equipped with a retaining device of the present invention, and FIG. 3 is an enlarged view of a main part of the device of the present invention. 4; Rotating body, 6: Rotating shaft, 64; Engagement groove, 7;
Retaining device, 71; Set pin, 71b; Lock groove, 72 ; Lock mechanism, 72; Retaining nut, 72b; Slanted hole, 72; Spring, 74; Ball.

Claims (1)

[Scope of utility model registration request] A set pin is pressed by a spring so that its tip engages with the engagement groove in a rotating body into which a rotating shaft having an engagement groove can be removably inserted, and the set pin and the rotating body are attached to the rotating body. A rotating shaft locking device equipped with a locking mechanism that locks using centrifugal force.