JP2522209Y2 - Clutch engagement structure - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a clutch engagement structure applied to a power transmission / disconnection mechanism (clutch) in a power transmission device of a rotary shaft or the like.

[0001]

2. Description of the Related Art FIG. 6 shows a conventional clutch engagement structure in which the engagement angle is 0 °. FIG. 6A is a side view thereof, and FIG. 6B is a sectional view taken along line AA. FIG. 2 (C) is a view taken along the arrow B in FIG.

FIG. 7 shows a conventional point contact clutch engagement structure with an engagement angle θ °, wherein FIG. 7A is a side view thereof, and FIG. 7B is a cross-sectional view taken along line CC of FIG. FIG. 3 (C) is a view taken on line D of FIG.

[0006] In FIGS. 6 and 7, reference numerals 11 and 12 denote a meshing pawl clutch as a power transmission / disconnection mechanism, 13 denotes a rotating shaft for rotating one of the meshing pawl clutches 11, 14.
Is a transmission shaft for transmitting the rotation transmitted to the other meshing pawl clutch 12.

[0004] The annular clutch surfaces of the meshing pawl clutches 11 and 12 are formed by forming irregularities formed of meshing claws 11a, 11b, ... at regular intervals. Are engaged with the engaging claw 12a of the other engaging claw clutch 12, and the recess of the one engaging claw clutch 11 is engaged with the engaging claw 12a, 12b,. Rotation transmission is performed.

In the clutch engagement structure shown in FIG. 6, the engagement tooth surfaces 11a of the mutual clutches 11 and 12 are provided.
, 12a1, 12b1,... All have a meshing angle of 0 ° parallel to the rotation axis and have a planar shape.

That is, the claws 1 of the mutual clutches 11 and 12
., 12a, 12b,...
°, the meshing tooth surfaces 11a1, 11b1,.
The contact state of a1, 12b1,... corresponds to the entire surface, and a large transmission torque can be obtained, and there is a characteristic that the tooth surface wear is small, but the claws 11a, 11b,.
There is a disadvantage that the meshing of 12b,.

On the other hand, in the clutch engagement structure shown in FIG. 7, the engagement tooth surfaces 11a1, 11a1
11b1,..., 12a1, 12b1,.

That is, the claw 1 of the clutches 11 and 12
., 12a, 12b,...
°, the claws 11a, 11b,.
, 12a1, 12b,..., 12a1, 12b,.
Even if there is no manufacturing error etc., the contact state of b1,... does not become the entire surface when viewed from the point, the transmission torque is reduced, the tooth surface wear is increased, and the vibration and noise are disadvantageous. is there.

[0009]

That is, in the above-described conventional clutch engagement structure, when the engagement angle between the clutches 11 and 12 is set to 0 ° to obtain a large transmission torque, the claws 11a, 11b,. , 12b,... Are easily disengaged, and the claws 11a, 11b,..., 12a, 12b,.
There is a contradictory problem that the transmission torque is reduced when it is difficult to disengage the gears.

[0010] The present invention has been made in view of the above problems,
Even when the meshing angle between the clutches is set to θ °, and the meshing pawl is hard to be disengaged, the clutch meshing surface can obtain a large transmission torque without the partial contact of the meshing tooth surface. The purpose is to provide a structure.

[0011]

In other words, the clutch engagement structure according to the present invention is that the engagement surfaces of a plurality of engagement claws provided on an annular clutch connecting / disconnecting surface of a rotary power transmission clutch are formed by a ruled surface. And a curved surface shape based on.

[0012]

[Operation] In other words, the meshing angle θ ° between the pair of clutches is obtained, and not only the disengagement of the meshing claws is prevented, but also the contact state between the tooth surfaces becomes the entire surface, so that a large rotation transmission torque can be obtained. Will be able to

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a clutch surface shape based on the clutch engagement structure of the present invention. An annular clutch connecting / disconnecting surface of one clutch 21 is provided at regular intervals with engagement claws 21a, 21b,. Are formed, and the meshing tooth surfaces 21a1, 21b1,... Corresponding to the rotational side surfaces of the meshing claws 21a, 21b,... Are formed as curved surfaces based on the ruled surface principle.

Here, the meshing tooth surfaces 21a1, 21b1,
Are formed in a curved shape based on the principle of the ruled surface, the meshing angle θ ° with respect to the rotation center axis CL and the entire surface of each tooth surface 21a1, 21b1,.

FIG. 2 shows the principle of the ruled surface defined as the tooth surface shape of the meshing pawl in the clutch meshing structure, that is, a rectangular parallelepiped ABCD.
It is assumed that a rubber band equal to each side of the diagonal plane ABHE is set in the EFGH. The sides AB and AE of the rubber band are fixed, and only the H point of the side HE is moved to the C point.

At this time, the area surrounded by the rubber band is A
The curved surface of the BCE becomes a curved surface of a so-called ruled surface.
The meshing tooth surfaces 21a1, 21b1,... Of 21b,.

That is, the points ab1, ab2,..., Abn obtained by equally dividing the two line segments EC and AB by the same number.
And a number of line segments ab1-ec1, formed by connecting ec1, ec2, ..., ecn
When formed by ab2-ec2, ..., abn-ecn, a surface ABCE formed by an aggregate of these many line segments ab1-ec1, ab2-ec2, ..., abn-ecn becomes a curved surface based on a ruled surface. .

FIG. 3 shows the principle of adaptation of the tooth surface of the ruled surface in the clutch engagement structure, that is, as shown by the area x in FIG. 1, the side AB corresponds to the rotation center axis CL of the clutch 21. , HE correspond to the outer diameter line of the clutch 21.

Here, if the tooth width surface corresponding to the plane ABHE is defined as the meshing tooth surface, the meshing angle is 0 °.
Face width surface IJ corresponding to curved surface ABCE with meshing angle θ °
CE is configured as meshing tooth surfaces 21a1, 21b1,... Of the clutch 21.

FIG. 4 shows the structure of a rotary power transmission mechanism used for various industries. In FIG. 4, reference numeral 31 denotes a motor, 32 denotes a spline shaft, and 33 denotes a pair of clutches 21 and
A clutch slide lever for connecting and disconnecting 22 is shown, 34 is a speed reducer, and 35 is a rotating drum.

That is, the clutches 21 and 22 having the toothed surface shape of the above-mentioned ruled surface are disposed to face each other, and are connected and disconnected by the clutch slide lever 33 as shown by the arrow y, so that the clutch is shifted from the clutch outer diameter line toward the center. Thus, a clutch engagement structure having a smaller engagement angle θ ° and having opposing tooth surfaces contacting the entire surface can be obtained.

FIG. 5 shows the clutch 2 of the rotary power transmission mechanism.
1 and 22 show the power transmission state. When a rotational force in the direction and magnitude indicated by arrow O is applied to the meshing pawl 21a having the tooth surface 21a1 having the meshing angle θ °, the arrow Q indicates A component force indicated by an arrow P is exerted by the indicated vector action, so that the pair of clutches 21 and 22 are hardly attracted to each other and disengaged.

Assuming that there is no division error (equal division accuracy) between the meshing tooth surfaces 21a1 and 22a1 in the pair of clutches 21 and 22, respectively, the meshing tooth surfaces 21a1 and 22a1 are not included.
22a1 is the entire surface, and the meshing contact area is maximized.

Therefore, according to the clutch engagement structure having the above structure, the engagement claws 21a, 2a of the clutch 21 are provided.
1b,... Are formed as curved surfaces based on a ruled surface, so that a meshing angle θ ° between a pair of clutches can be obtained, and the disengagement of the meshing claws is prevented. Alternatively, since the contact state between the tooth surfaces is the entire surface, a large rotational transmission torque can be obtained, the tooth surface wear is reduced, and vibration and noise can be reduced.

As a result, if a transmission torque similar to that of the conventional clutch engagement structure can be obtained, a clutch smaller than the conventional clutch can be constructed. In addition to the above-mentioned increase in life, reduction of vibration and noise, Installation space can be reduced.

[0027]

As described above, according to the present invention, the engaging surfaces of the plurality of engaging claws provided on the annular clutch connecting / disconnecting surface in the rotary power transmission clutch are formed into curved surfaces based on a ruled surface. With this configuration, the meshing angle between the clutches is set to θ °, and it is possible to obtain a large transmission torque without making the meshing pawl difficult to disengage, without causing the meshing tooth surface to hit partially. Become.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a clutch surface shape based on a clutch engagement structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing the principle of a ruled surface defined as the tooth surface shape of a meshing pawl in the clutch meshing structure.

FIG. 3 is a diagram showing a principle of adapting a tooth surface of a ruled surface in the clutch engagement structure.

FIG. 4 is a diagram showing a configuration of a rotary power transmission mechanism used for various industries.

FIG. 5 is a diagram showing a power transmission state in a clutch portion of a rotary power transmission mechanism using the clutch engagement structure.

FIG. 6 is a diagram showing a conventional clutch engagement structure with an engagement angle of 0 °.

FIG. 7 is a diagram showing a conventional point contact clutch engagement structure with an engagement angle θ °.

[Explanation of symbols]

21, 22,... Clutches, 21a, 21b, 22a, 22
b: meshing claws, 21a1, 21b1, 22a1, 22b1: meshing tooth surfaces, 31: motor, 32: spline shaft, 33: clutch slide lever, 34: speed reducer, 35: rotating drum, CL: rotation center shaft.

Claims (1)

(57) [Scope of request for utility model registration] 1. A clutch engagement wherein each of a plurality of engagement claws provided on an annular clutch connection / disconnection surface of a rotary power transmission clutch has a curved surface shape based on a ruled surface. Construction.