JPH0743492Y2 - Rotating shaft coupling device - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a coupling device for a rotating shaft that can be coupled and separated with one touch.

B. Outline of the Invention The present invention relates to a rotating shaft coupling device capable of coupling and separating a pair of rotating shafts from each other, in which a male spline and a female spline are meshed with each other and centrifugal force is utilized. By providing a retaining piece that prevents the male spline from slipping out of the spline, it is possible to connect and separate the rotating shafts with one touch, so that they can be connected and separated without any troublesome work. is there.

C. Conventional Technology On a production line for automobile engines, engine quality is checked using a dynamometer.

The dynamometer is connected to the engine as shown in FIG. That is, the dummy clutch housing 2 is attached to the output shaft side of the engine 1, and the output shaft 2 a of the dummy clutch housing 2 is connected to the dynamometer 4 via the universal joint 3. The output shaft 2a and the universal joint 3 are joined by bolting the flange 2b and the flange 3a, and the universal joint 3 and the dynamometer 4 are joined by bolting the flange 3b and the flange 4a.

The dummy clutch housing 2 is provided to avoid torsional resonance when the engine 1 and the dynamometer 4 are directly connected, and the dummy clutch housing 2 incorporates a flywheel and a clutch of an automobile.
The dummy clutch housing 2 is attached to the engine 1 in the process before connecting with the dynamometer 4.

D. Problems to be solved by the invention However, bolts must be tightened and removed to connect and disconnect the engine and the universal joint, and it takes time to combine and separate the operation rate. Will decrease.

Then, this invention aims at providing the coupling device of the rotating shaft which solved such a subject.

E. Means for Solving the Problems The constitution of the present invention for achieving such an object is to form male splines by forming spline blades at equal intervals on the outer peripheral surface of the end of one rotating shaft, and By forming a spline blade on the inner peripheral surface of the hollow spline hub provided at the end of the rotating shaft of, a female spline that meshes with the male spline is formed, and at the end of the male spline, it is the same as the male spline blade. A spline plate with a specified spline blade is provided that is rotatable about the male spline shaft center and restrains movement in the direction along the shaft center, and engages with the female spline to form the surface of the spline plate opposite to the male spline. In addition, a strut protruding from the position corresponding to the valley portion of the spline blade to the anti-male spline side along the axis is provided. A retaining piece is rotatably provided around the tangent of a circle centered on the axis of the spline, and the retaining piece is provided with a weight part that protrudes radially from the trough of the spline blade in the spline plate by centrifugal force. A safety groove with a width larger than the thickness of the spline plate and an inner diameter larger than the outer diameter of the spline plate is formed in the middle of the spline blade in the female spline in the axial direction, and the retaining piece is female in the circumferential direction. It is characterized in that a restraining means for restraining the rotation of the spline plate is provided so as to move within a range between valley portions of the spline blade in the spline.

F. Action The rotation shafts are connected and separated by engaging and pulling out male splines and female splines formed at the ends of the rotation shafts.

When the rotary shaft rotates, the weight portion of the retaining piece rotates by centrifugal force to the anti-center axis of the rotary shaft and abuts the spline blade of the female spline to prevent separation of the rotary shafts. When a large force acts and begins to come off, the spline plate slides into the safety groove, and the retaining pieces and the like act as an eccentric load to rotate the spline plate in the safety groove. Therefore, the crest portion of the spline blade on the spline plate overlaps the crest portion of the spline blade on the female spline to prevent the spline blade from coming off.

G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Since the present embodiment is an improvement of a part of the conventional rotary shaft coupling device, the same parts as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

(A) Configuration of Embodiments A rotary shaft coupling device according to the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 4, the universal joint 3 is connected to the output shaft 11 via the spline hub 10.

FIG. 1 shows the structure of the connecting portion between the spline hub 10 and the output shaft 11. As shown in the figure, a male spline is attached to the tip of the output shaft 11.
13 are provided, and square spline blades 12 are formed on the outer peripheral surface of the male spline 13 at equal intervals. On the other hand, a spline hub 10 having a hollow portion 14 is provided at the end of the universal joint 3, and a female spline 16 having a spline blade 15 that meshes with the male spline 13 is formed on the inner peripheral surface of the spline hub 10 on the opening side. To be done. A shaft portion 17 is formed at the end of the male spline 13 with a reduced outer diameter, and the spline plate 19 has a ring-shaped spline blade 18 having the same specifications as the spline blade 12 of the male spline 13.
Is rotatably supported by the shaft portion 17. The spline plate 19 meshes with the vicinity of the right end of the female spline 16 in the figure. In the position corresponding to the valley portion of the spline blade 18 in the spline plate 19 (see FIG. 2), the base end portion of the column 20 projecting to the right in FIG. 1 is embedded and caulked, and the male spline 13 A retaining piece 22 rotatably attached to the column 20 via a pin 21 located on the tangent of a circle centered on the axis.
Is attached. A weight portion 22a is formed in a portion of the retaining piece 22 away from the pin 21 (see FIG. 3).
When the weight portion 22a is located on the anti-center side in the radial direction of the male spline 13 as shown in the figure, the weight portion 22a projects from the valley portion of the spline blade 18 in the spline plate 19 toward the anti-center side. . The rotation of the spline plate 19 is constrained so that the retaining piece 22 moves in the circumferential direction only in the range connecting the adjacent valley portions of the spline blades 15 in the female spline 16, and the spline plate 19
In order to restrain the movement in the direction along the axial center of the holding plate 24, as shown in FIG. 2, a holding plate 24 as a restraining means in which a notch 23 is formed on the outer peripheral surface over a range of an angle .theta. Attached to the end of 13. A safety groove 26 is formed along the circumference by removing a part of the spline blade 15 at a position midway in the axial direction of the spline blade 15 in the female spline 16 and near the right end in FIG. It The safety groove 26 is formed so that the groove width W is larger than the thickness t of the spline plate 19 so that the spline plate 19 can be inserted and rotated, and the inner diameter dimension D (see FIG. 2) of the safety groove 26 is set to the spline plate 19. Is set to be larger than the outer diameter dimension d.

Incidentally, 27 is a backing plate for preventing the male spline 13 from being pushed too far into the female spline 16, and 28 is a bearing.

(B) Operation of Embodiment Next, the operation of the rotating shaft coupling device will be described.

When connecting the output shaft 11 and the spline hub 10, the weight portion 22a of the retaining piece 22 is directed to the right in FIG. 1 (a), and the spline plate 12 is attached to the spline blade 12 of the male spline 13. The male spline 13 and the female spline 16 are engaged with each other while the spline blades 18 of 18 are overlapped. At this time, the male spline 13 is inserted into the female spline 16 until the female spline 16 contacts the contact plate 27. Only by this meshing work, the work for connecting the universal joint 3 and the output shaft 11 is completed.

Next, the engine is rotated and the test is performed. When the output shaft 11 starts to rotate, the weight portion 22a of the retaining piece 22 is pinned by the centrifugal force.
It rotates about, and becomes the state shown by (b) in FIG. Therefore, the weight portion 22a of the retaining piece 22 comes into contact with the crest portion of the spline blade 15 in the female spline 16 and exerts a resistance against the male spline 13 coming out to the left in FIG. That is, the retaining piece 22 is connected to the output shaft 11 and the spline hub.
Prevent separation from 10.

In the unlikely event that the separating force larger than the resistance of the retaining piece 22 acts and the male spline 13 begins to come off from the female spline 16, the spline plate 19 is inserted into the safety groove 26 and can freely rotate. Then, the retaining piece 22 can freely move in the circumferential direction within the range of θ in which the notch 23 is formed in FIG. 2, and the column 20 and the retaining piece 22 are attached to the spline plate 19. Since the eccentric load is applied to the spline plate 19 within the range of θ, the spline plate 19 in the safety groove 26 is rotated.
The rotation of is stopped when the pin 21 is in contact with the pressing plate 24.
At this time, the retaining piece 22 always corresponds to the valley portion of the spline blade 15 in the female spline 16, while the spline blade 18 in the spline plate 19 does not.
Inevitably corresponds to the mountain portion of the spline blade 15 in. Therefore, the leftward movement of the spline blade 18 in the spline plate 19 in the safety groove 26 in FIG. 1 is obstructed by the crest portion of the spline blade 15, and the male spline 13
Can no longer get out of female spline 16. That is, it has two separation preventing means in addition to the above-mentioned retaining piece 22, and double safety is ensured.

To separate male spline 13 from female spline 16, reverse male spline 16 to male spline.
Just pull out 13. When pulling out, the retaining piece 22 rotates about the pin 21 due to the force relatively applied from the spline blade 15, and the state (b) is changed to the state (a), so that the retaining piece 22 can be easily removed. When the spline plate 19 enters the safety groove 26, it rotates and the spline blade 18
It is desirable to perform the extraction work at once because there is a risk that the crest part of the and the valley part of the spline blade 15 do not correspond.

The spline plate 19 has a spline blade 18 and a spline blade.
There is a possibility that noise may be generated by reciprocating in the circumferential direction by a slight gap with respect to 15, but since the retaining pieces 22 and the like are applied to the spline plate 19 as an eccentric load, the rotational speed of the output shaft 11 increases. The spline plate 19 is strongly pressed in the counter-rotational direction to eliminate the gap and prevent vibration. Further, as the number of rotations increases, the frictional force between the spline plate 19 and the female spline 16 increases, and a force for preventing the female spline 16 and the male spline 13 from separating acts.

H. Effect of the Invention As can be seen from the above description, the rotary shaft coupling device according to the present invention has the following effects.

(A) Rotating shafts can be joined or separated with a single touch by simply engaging and disconnecting the female and male splines, eliminating the need for complicated bolt tightening work as in the past. Occupancy rate increases.

(B) The retaining piece and the spline plate double prevent the male spline and the female spline from coming off.
The rotating shafts are not separated during the rotation of the rotating shafts, and the safety is high.

[Brief description of drawings]

1 to 4 relate to an embodiment of a rotary shaft coupling device according to the present invention. FIG. 1 is a sectional view showing a coupling portion between an output shaft and a spline hub, and FIG. 2 is a line I- of FIG. FIG. 3 is a perspective view showing a mounting state of the column and the retaining piece, and FIG. 4 is an external view showing a coupling state of the engine and the dynamometer.
FIG. 5 is an external view showing a connecting portion between a conventional engine and a dynamometer. 3 ... Universal joint, 10 ... Spline hub, 11
… Output shaft, 12, 15, 18… Spline blade, 13… Male spline, 16… Female spline, 17… Shaft part, 19… Spline plate, 20… Strut, 21… Pin, 22… Stopper, 22a… Weight part , 23 ... Notches, 24 ... Holding plate, 26 ... Safety groove.

Claims (1)

[Scope of utility model registration request] 1. A male spline is formed by forming spline blades at equal intervals on the outer peripheral surface of the end of one rotating shaft.
A female spline that meshes with the male spline is formed by forming a spline blade on the inner peripheral surface of the hollow spline hub provided at the end of the other rotary shaft, and at the end of the male spline, the male spline blade and A spline plate with spline blades of the same specifications is provided so as to be rotatable about the male spline's shaft center and constrains movement in the direction along the shaft center, and engages with the female spline so that the spline plate's anti-male spline side A post that projects from the position corresponding to the trough of the spline blade to the anti-male spline side along the axis is provided with the tangent of a circle centered on the axis of the male spline. As a result, a retaining piece is rotatably provided, and the retaining piece is released from the valley of the spline blade in the spline plate by centrifugal force. Form a weight part that protrudes in the radial direction, and form a safety groove with a width larger than the thickness of the spline plate and an inner diameter dimension larger than the outer diameter dimension of the spline plate in the middle in the axial direction of the spline blade in the female spline. A coupling device for a rotating shaft, comprising: restraining means for restraining rotation of the spline plate so that the retaining piece moves in a circumferential direction within a range between valley portions of the spline blade in the female spline.