JP2852670B2 - Power transmission device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power transmission device in which two coaxially arranged rotating shafts and the like are connected by a joint. More specifically, the present invention relates to a power transmission device in which a rubber member is provided between an input-side member and an output-side member of a joint in order to absorb rotational and axial vibrations.

[Prior Art] Joints provided with rubber members as described above are, for example,
No. 56-35542. This joint is basically formed of an annular body, and a plurality of input-side members and a plurality of output-side members are alternately arranged at intervals in a circumferential direction, and two adjacent members are interposed between the two members. Are connected by a rubber member arranged at the center. The input-side member is fixed to an end surface of a flange of one shaft by an axial bolt, and the output-side member is fitted to the inside of the annular body by a radial bolt of the annular body. Is fixed to the outer peripheral surface of.

Conventionally, in the operation of connecting the above-mentioned joint to a pair of shafts, the joint can be incorporated at a predetermined position between the two shafts by widening the interval between the two shafts or deforming the rubber member of the joint. It has become.

[Problems to be Solved by the Invention] However, when the joint of the above type is used for connecting an engine mounted on a ship and an outboard drive device, the following problem arises in incorporating the joint. .

That is, in such an application, after the engine and the drive device are installed on the hull, a joint is assembled between the output shaft of the engine and the input shaft of the drive device. Therefore,
The distance between the output shaft and the input shaft cannot be wider than a predetermined distance. Moreover, in a marine drive system,
Since the transmission power is large, a high-rigidity rubber member is used as the rubber member of the joint. As a result, it is not easy to deform the rubber member in advance for installation.

In particular, in a marine drive system, an uneven fitting portion (more specifically, an end face of a joint flange provided on each of an engine output shaft and a drive device input shaft, and an end face of a joint member of a joint fixed thereto is provided. (A heater fitting portion). Therefore, in order to incorporate a joint between the two shafts, it is necessary to temporarily reduce the entire length of the joint by at least a length corresponding to the protruding height (or depression depth) of the uneven fitting portion. This is necessary, and the above-mentioned problem becomes more pronounced.

An object of the present invention is to provide a structure that solves the above problem.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a joint between a first and a second rotating shaft which are arranged concentrically at an interval in the axial direction, The joint is provided with first and second assemblies that are provided so as to be relatively movable in the axial direction and the circumferential direction, and the two assemblies are alternately located at intervals in the circumferential direction. Of the two adjacent
A rubber member is arranged between the inserts, and the rubber members are connected in the circumferential direction. The first assembly is provided with a first fixing portion fixed to the first rotating shaft, and the second assembly is provided with a first fixing portion. A second fixing portion fixed to the second rotation shaft is provided, and a relative position changing mechanism for connecting the joints so as to change the axial relative positions of the two assemblies is provided.

According to this configuration, in the first stage of the joint assembling work, the two assemblies are connected by the relative position changing mechanism (for example, the screw mechanism), and the rubber member is compressed in the axial direction to reduce the distance between the two assemblies. In this state, the joint can be arranged between the first and second rotating shafts already at the predetermined position. By releasing the relative position changing mechanism (for example, the screw mechanism) after this arrangement, the rubber member is elastically restored, and the first and second rubber members are restored.
Can be fixed to the first and second rotating shafts, respectively.

Further, according to the present invention, the first rotating shaft which is the output shaft of the engine and the second rotating shaft which is the input shaft of the drive device are concentrically arranged at an axial distance from each other. Two joints are arranged concentrically adjacent to the first and second rotating shafts, respectively, and the first and second joints are provided in each joint so as to be relatively movable in the axial direction and the circumferential direction. Are provided, a plurality of inserts are provided alternately at intervals in the circumferential direction on both of the assemblies, and a rubber member is disposed between two adjacent inserts so that the Direction, and each first assembly is provided with a first fixing portion fixed to an adjacent first or second rotating shaft, and the first rotating portion is in contact with each of the rotating shafts and the first fixing portion. A contact surface that fits in the soldering style is provided, and both second assemblies are integrated with an intermediate shaft common to both. A relative position changing mechanism for axially connecting the first and second assemblies to at least one of the joints and changing a relative position in the axial direction between the first and second assemblies. Is provided so as to be able to be released.

In this configuration, two joints connected together via an intermediate shaft by reducing the overall axial length of the first and second assemblies by the screw mechanism of both or one of the joints Is assembled between the joint flange on the output shaft of the engine and the joint flange on the input of the drive unit, and then the screw coupling mechanism is released, so that the uneven fitting portion between the joint flange and the fixed portion is released. Can be completed.

[Embodiment] In FIG. 1, a first rotating shaft 1 and a second rotating shaft 2 are coaxially arranged at an axial interval. Outward joint flanges 3 and 4 are integrally provided at adjacent ends of the rotating shafts 1 and 2. A joint 5 is concentrically arranged between the two joint flanges 3, 4.

The joint 5 includes an annular body 9 including a plurality of inserts 6 and 7 and a rubber member 8 in a positional relationship concentric with the rotating shafts 1 and 2. 2, the inserts 6 and the inserts 7 are alternately arranged at intervals in the circumferential direction of the annular body 9 as shown in FIG.
A rubber member 8 is arranged between the inserts 6 and 7. The rubber member 8 is fixed to the inserts 6 and 7 by baking or the like.

In FIG. 1, an annular flange 10 is provided between the annular body 9 and the joint flange 3. Each insert 6 abuts one end face 13 of a portion of the flange 10 near the outer periphery and is fixed by an axial bolt 12.

An annular concave portion 15 having a shallow depth D (length in the axial direction) is provided in a portion of the other end surface of the flange 10 near the inner periphery. The joint flange 3 is provided at its distal end surface with an annular convex portion 16 that enters the concave portion 15. Flange 10 and fitting flange 3
In a state where the end surfaces are in contact with each other and the concave portion 15 and the convex portion 16 are fitted in a ring shape, they are fixed to each other by a plurality of bolts 17 (only one is shown).

Between the flange 10 and the joint flange 4, a cylindrical boss 20 is provided inside the annular body 9. Each of the inserts 7 is fixed by a radial bolt 22 in a state of being seated on the outer peripheral surface of the boss 20. Boss 20 is a flange
An annular projection 25 having a height d (length in the axial direction) is provided on the inner peripheral portion of the end face opposite to 10. The joint flange 4 is provided at its distal end surface with an annular concave portion 26 into which the convex portion 25 enters. The joint flange 4 and the boss 20 are fixed to each other by a plurality of bolts 27 in a state where the end faces are in contact with each other and the convex portion 25 and the concave portion 26 are fitted in a ring shape.

As shown in FIG. 3, in an assembled state (operating state) in which the parts are connected by bolts, the rotational force from the rotating shaft 1 is transmitted from the joint flange 3 to the insert 6 via the flange 10,
The power is transmitted from the insert 6 to the insert 7 via the rubber member 8, and transmitted from the insert 7 to the rotary shaft 2 via the boss 20. In this power transmission operation, the vibration in the rotational direction and the axial direction is absorbed by the elastic deformation of the rubber member 8.

As can be seen from the above description, the insert 6 and the flange 10 form an input-side (first) assembly rigidly fixed to each other by the bolt 12, and the insert 7 and the boss 20 are rigidly fixed to each other by the bolt 22. The fixed output side (second
A) assembly. The two assemblies are connected to each other by a rubber member 8 in a state where relative movement in the circumferential direction and the axial direction is allowed.

In order to allow the above-described vibration absorption operation of the rubber member 8 in the axial direction, that is, to allow the rubber member 8 to be deformed in the axial direction, an axial gap 40 (the first gap) is provided between the inner peripheral portion of the flange 10 and the boss 20. 3) is formed. The gap 40 has a function of allowing the axial deformation of the rubber member 8 and also a function of allowing the axial length L of the entire joint 5 to be shortened in the joint assembling work as described below. Do.

In order to shorten the length L, a plurality of screw holes 41 (only one is shown) are provided on the end face of the boss 20 adjacent to the flange 10, and the flange 10 is stepped concentrically with each screw hole 41. A bolt insertion hole 42 is provided. An axial bolt 45 is screwed into the screw hole 41.
Has a large hole 46 for inserting and removing bolt 45
Is provided.

In the state shown in FIG. 1, the head of the bolt 45 is
The bolt 45 is completely screwed into the screw hole 41 in a state of contact with the inner peripheral step of the
Is in contact with boss 20. As a result, the axial length l of the entire joint 5 is reduced by a distance greater than the sum of the depth D and the height d of the concave and convex portions, that is, the gap 40, as compared with the length L of FIG. I have.

In the work of assembling the joint 5, the joint 5 is first brought into the shortened state shown in FIG. Thereby, the joint 5 can be easily inserted between the rotating shafts 1 and 2 which are already installed at a fixed center distance. After its insertion, the bolt 45 is removed through the hole 46. Then, the rubber member 8 is elastically restored to some extent, and the flange 10 and the boss 20 are respectively connected to the joint flanges 3 and 4.
In the predetermined positional relationship (the state shown in FIG. 3),
By attaching bolts 17 and 27 in that state, the joint 5
Is completed.

The above-described embodiment is suitable when the distance between the rotating shaft 1 and the rotating shaft 2 is relatively short. When the present invention is applied to a ship, the output shaft of the engine disposed on the ship and the input shaft of the drive device disposed outside the ship are connected by the device according to the present invention. In such a ship, the distance between the output shaft and the input shaft is often relatively long, and for such an application, the following structure is proposed in the present invention.

4 and 6, a rotating shaft 1 is an output shaft of the engine E of the marine vessel, and a rotating shaft 2 is an input shaft of the drive device D. The two rotating shafts 1 and 2 are relatively far apart, and two joints 5 substantially similar to the joint 5 in FIG. The two joints 5 are arranged in a posture opposite to each other, and are respectively connected to the flanges 3 and 4 of the rotating shafts 1 and 2 by the same structure as the embodiment of FIG. In each joint 5, the structure of the annular body 9, the screw hole 41, the bolt 45
The structure of the screw mechanism (relative position changing mechanism) consisting of
It is the same as the embodiment shown in the figure, and only the connection structure between the boss 20 and its counterpart shaft is different as follows.

That is, in the embodiment of FIG. 4, the bosses 20 of the two joints 5 are rigidly connected by the common intermediate shaft 50. Both ends of the intermediate shaft 50 are fitted between the outer periphery of the boss 20 and located between the boss 20 and the annular body 9, and are fixed to the boss 20 together with the insert 7 by bolts 22.

In short, the differences between the embodiment of FIG. 1 and the embodiment of FIG. 4 are as follows. In the embodiment of FIG. 1, the flange 10 (first fixing portion) of the first assembly of the joint 5 including the insert 6 is shown.
Is fixed to the rotating shaft 1 (first rotating shaft), and the boss 20 (second fixed portion) of the second assembly including the insert 7 is
(Second rotating shaft). On the other hand, in the embodiment of FIG. 4, the flange 10 of the first assembly of the two joints 5 is provided.
(1st fixed part) is each a rotating shaft 1 (1st rotating shaft)
The boss 20 (second fixed portion) of the second assembly of the two joints 5 is connected to each other by an intermediate shaft 50 common to both.

Further, a cylindrical portion 28 is provided on the inner peripheral portion of the flange 10 to enter the inside of the boss 20, and between the cylindrical portion 28 and the boss 20,
An insert 30 having a circular outer peripheral shape in cross section is provided. The insert 30 is fixed to the outer periphery of the tubular portion 28 by a snap ring.

In the embodiment shown in FIG. 4, the bolt 45 of each joint 5 is also provided.
Is used in the same manner as in FIG.
Can be temporarily shortened to a value shorter than a predetermined distance L1 between the two shafts 1 and 2 so that the entire joint assembly can be Can be incorporated between

The operation of the bolt 45 is performed using a space (work space) opposite to the flange 10 with respect to the joint flanges 3 and 4. The work space is usually set to the size necessary for the work, but it is possible that the work space cannot be set large enough due to the relationship with other equipment. The overall length of the joint assembly can be reduced by a predetermined amount using only the bolt 45 of one joint 5.

The structure shown in FIG. 4 can be modified as shown in FIG.

In the structure shown in FIG. 5, the flange fixing bolt 17 shown in FIG.
Are abolished, and the flange 10 is fixed to the joint flange 3 or the joint flange 4 by bolts 12 for fixing the insert 6. To make such a connection, the joint flanges 3, 4 of the rotating shafts 1, 2 are enlarged in diameter and have substantially the same diameter as the flange 10.
In the illustrated embodiment, the diameter of the recess 15 is also increased.

In the structure of FIG. 5, a screw hole 41 for mounting a bolt 45 is provided.
Can be provided on the insert 7 instead of being provided on the boss 20.

[Effects of the Invention] As described above, according to the present invention, the entire length of the joint 5 or the joint assembly can be temporarily reduced by a screw mechanism (relative position changing mechanism) such as the bolt 45, so that the distance between the shafts cannot be changed. The joint 5 can be easily incorporated between the two rotating shafts 1 and 2, and the assembling and connecting work can be simplified.

[Brief description of the drawings]

1 is a sectional view of a first embodiment of the present invention in a joint shortened state, FIG. 2 is a schematic view taken along the line II-II of FIG. 1, and FIG.
4 and 5 are cross-sectional views showing different embodiments, respectively, and FIG. 6 is a schematic side view of a main part of a ship employing the embodiment of FIG. It is. 1, 2, ... rotating shaft, 5 ... joint, 6, 7 ... insert, 8 ... rubber member, 15 ... concave part, 16 ... convex part, 40 ...
Clearance, 41: Screw hole (screw mechanism), 45: Bolt (relative position change mechanism), 50: Middle shaft

Claims (2)

(57) [Claims] 1. A joint is disposed between first and second rotating shafts which are arranged concentrically at an interval in the axial direction and are relatively movable in the axial direction and the circumferential direction. And a plurality of inserts provided alternately at circumferential intervals on each of the two assemblies, and a rubber member is provided between two adjacent inserts. Are arranged circumferentially and connected to each other, and the first assembly is provided with a first fixing portion fixed to the first rotation shaft,
The assembly is provided with a second fixing portion fixed to the second rotating shaft, and the joint is provided with a relative position changing mechanism for connecting the two assemblies so that the relative position in the axial direction can be changed. Power transmission device. 2. A first rotating shaft, which is an output shaft of an engine, and a second rotating shaft, which is an input shaft of a drive device, are concentrically arranged at an axial distance from each other. , Two joints are arranged concentrically adjacent to the first and second rotating shafts, respectively, and the first and second joints are provided in each joint so as to be relatively movable in the axial direction and the circumferential direction. An assembly is provided, a plurality of inserts are alternately positioned on each of the two assemblies at circumferentially spaced intervals, and a rubber member is disposed between two adjacent inserts so that they are arranged in the circumferential direction. The first assembly is provided with a first fixing portion fixed to the adjacent first or second rotation shaft, and the first assembly is not in contact with each of the rotation shafts and the first fixing portion. A contact surface that fits in the form of a braze is provided, and both second assemblies are integrated with an intermediate shaft common to both. A second fixed portion to be connected is provided, and a relative position changing mechanism for axially connecting the first and second assemblies to at least one of the joints to change the relative position in the axial direction of the first and second assemblies is changed to a connected state. A power transmission device provided in a state where it can be released.