JP2003028191A - Power transmitting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmitting mechanism capable of being assembled in a compressor independently of a rotating direction. SOLUTION: A plate engaging member 7 is turnably supported by a flange part 3b of a first rotary member 3 through a rivet 6 freely. A flat holding plate 9 formed with a holding part 9c is fixed to the flange part 3b of the first rotary member 1, and a part 7c to be pinched of the engaging member 7 is pinched between the holding part 9c and the flange part 3b. A lock member 11 formed with a lock part 11c is assembled in a second rotary member 10. This power transmitting mechanism 1 is assembled in the compressor 2 so that the engaging member 7 is turned around the rivet 6 to remove the engaging part 7b of the engaging member 7 from the lock part 11c of the lock member 11 when an excessive load is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission mechanism assembled in a car air conditioner compressor or the like, and more particularly to a power transmission mechanism that cuts off power transmission when an overload is applied.

[0002]

2. Description of the Related Art As a power transmission mechanism of this type, there is one disclosed in Japanese Patent Laid-Open No. 10-267047. The power transmission mechanism described as the first embodiment in this publication has a first rotary member (hub) integrally rotatably arranged on a rotary shaft of a compressor and a protrusion formed on a housing of the compressor. A second rotating member (pulley) rotatably supported via a bearing is provided. Also the first
The rotating member is rotatably supported by a boss portion formed in a substantially triangular shape in a plan view, a flange portion extending in a radial direction from each corner portion of the boss portion, and a support pin on each flange portion. An engaging member (rotating claw), a first leaf spring arranged on the side surface of the flange portion on the rotational direction side of the second rotating member to press the engaging member in the anti-rotation direction side, and a second rotation A second leaf spring is provided on the side surface of the flange portion on the side opposite to the rotation direction of the member. Further, the second rotating member has a cylindrical portion that extends outwardly in the radial direction of the flange portion of the first rotating member and has a pulley groove on the outer peripheral surface, and an engaging member that is fixed to the inner peripheral surface of the cylindrical portion. A locked locking member (fixed claw) is provided.

In the power transmission mechanism having such a structure, the engagement state between the engaging member and the locking member is maintained by the elastic restoring force of the first leaf spring, so that the second rotating member changes to the first rotating member. Power is transmitted and the compressor is driven. Further, when an overload is applied to the rotating shaft of the compressor, the engaging member rotates about the support pin by the power transmitted to the second rotating member against the elastic return force of the first leaf spring. The engagement member is disengaged from the locking member and power transmission to the compressor is interrupted. Further, immediately before the engaging member is disengaged from the locking member, a second portion is formed in the notch (engaging shoulder) formed in the engaging member.
The plate spring is locked and the engaging member is held in a state of being disengaged from the locking member by the elastic restoring force of the first plate spring.

[0004]

In the conventional power transmission mechanism, the first leaf spring for maintaining the engaged state of the engaging member and the locking member is provided on the side of the second rotating member in the rotation direction. A flange portion of the first rotating member, which is provided on the side surface of the flange portion of the first rotating member and which maintains a state in which the engaging member is disengaged from the locking member, is a side opposite to the rotation direction of the second rotating member. Since the configuration provided on the side surface of the second rotation member is adopted, the rotation direction of the second rotation member is limited. An object of the present invention is to provide a power transmission mechanism that can be assembled to a compressor or the like regardless of the rotation direction of the second rotating member.

[0005]

In order to achieve such an object, a first invention is a first rotating member (3) and a second rotating member (1) rotatably arranged on a coaxial line.
0), the supporting part (7a) and the engaging part (7b), and the held part (7) between the supporting part (7a) and the engaging part (7b).
c) is provided, and a plurality of flat plate-shaped engaging members (rotatably supported by a supporting member (6) on the side surface of the first rotating member (3) or the side surface of the second rotating member (10) ( 7)
And holding portions (9c) of the same number as the engaging member (7) for holding the held portion (7c) of the engaging member (7), the side surface of the first rotating member (3) or the second Rotating member (1
0) is provided with a base portion (9a) fixed to the side surface, and a plurality of connecting portions (9d) that connect the holding portion (9c) and the base portion (9a) and are elastically deformable in the plate thickness direction. The flat plate-shaped holding plate (9) having the holding portion (9c) provided between the connecting portions (9d) adjacent to each other in the direction is engaged with the engaging portion (7b) of the engaging member (7). The same number of locking portions (11c) as the engaging members (7) are provided, and the second
A rotating member (10) or a locking member (11) arranged on the first rotating member (3), and the engaging member (7)
The held part (7c) is held between the side surface of the first rotating member (3) or the side surface of the second rotating member (10) and the holding portion (9c) of the holding plate (9), and When an overload is applied to the first rotating member (3) or the second rotating member (10), the engaging member (7) is resisted against the elastic return force of the connecting portion (9d) of the holding plate (9). ) Is rotated around the support member (6), and the engaging portion (7b) of the engaging member (7) is disengaged from the engaging portion (11c) of the engaging member (11). And

A second aspect of the present invention is the same as the first aspect of the present invention, in which the engaging projection (7d) formed on the held portion (7c) of the engaging member (7) and the holding portion (9) of the holding plate (9). 9c) is provided with an engaging concave portion (9b) engaged with the engaging convex portion (7d), and the engaging portion (7b) of the engaging member (7) engages with the engaging member (11). When disengaged from the stopper (11c), the engaging protrusion (7d) of the engaging member (7) pops out inside the inner peripheral surface of the holding plate (9) or outside the outer peripheral surface of the holding plate (9). It is characterized by being attached to.

A third aspect of the invention is the same as the first and second aspects, but the same number of engaging portions as the engaging members (7) are provided on the inner peripheral surface or the outer peripheral surface of the cylindrical portion (11b) extending in the axial direction. (11c)
A ring-shaped locking member (11) having a groove is provided, and the second rotating member (10) or the first rotating member (3) and the locking member (1
1) and 1) are connected via a damper mechanism (12).

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the engaging member (18, 20, 25) is provided with an elastic member (19, 24, 27), and the engaging portion is a locking portion. It is characterized by being press-fitted into.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the illustrated embodiments. 1 to 4 show a power transmission mechanism assembled in a compressor for a car air conditioner,
1 is a plan view, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a rear view of a first rotating member, and FIG. 4 is a plan view of a second rotating member.

In these drawings, the power transmission mechanism 1 is assembled to a car air conditioner compressor 2 driven by the power of an engine or a motor. The car air-conditioning compressor 2 has a configuration in which the tip of a rotary shaft 2a projects outward from a cylindrical projecting portion 2b of the housing. The first rotary member (hub) 3 disposed on the rotary shaft 2a and the projecting portion are provided. A second rotating member (pulley) 10 rotatably supported by a bearing 17 on the outer peripheral surface of 2b is provided on a coaxial line.

The first rotating member 3 has a cylindrical portion 3a having a stepped hole penetrating therethrough and a small-diameter side hole formed into a spline hole which is spline-fitted into a spline groove formed at the tip of the rotating shaft 2a. A disc-shaped flange portion 3b extending outward in the radial direction from an end of the cylindrical portion 3a on the protruding side of the rotary shaft 2a is integrally formed. In addition, a ring-shaped stopper member 4 is fitted into the large diameter hole of the cylindrical portion 3a, and is fixed by caulking the inner peripheral surface of the opening of the cylindrical portion 3a. Such a first rotating member 3 has a cylindrical portion 3a until the tip of the rotating shaft 2a contacts the stopper member 4.
After the spline is fitted to the rotary shaft 2a, the stopper member 4
The bolt 5 is inserted from the center hole of the shaft and is screwed into the screw hole of the rotary shaft 2a so that the rotary shaft 2a is integrally rotatably mounted. A shim for finely adjusting the dimension between the first rotating member 3 and the second rotating member 10 may be interposed between the tip of the rotating shaft 2a and the stopper member 4.

The flange portion 3b of the first rotating member 3 has a through hole formed in a position that divides the circumferential direction into three equal parts, and a screw that also has holes formed in a position that divides the circumferential direction into three equal parts. Holes are provided 60 degrees out of phase on the same circumference. The engaging member 7 is rotatably supported on the inner surface of the flange portion 3b (side surface on the second rotating member 10 side) by a rivet 6 as a supporting member that is inserted into the through hole and has its head caulked. , Holding plate 9 by means of mounting screws 8 screwed into the screw holes
Is fixed.

The engaging member 7 is formed by punching a thin metal plate into a generally rectangular shape in a plan view by a press machine, and one side in the longitudinal direction is provided with a through hole for inserting the rivet 6. It is provided as a support portion 7a. The other side of the engaging member 7 in the longitudinal direction is the first rotating member 3
Is provided as an engaging portion 7b protruding outward in the radial direction from the outer peripheral surface of the flange portion 3b, and an arcuate end surface is formed as an engaging surface that abuts on a locking surface of a locking portion 11c described later. Further, the engagement member 7 is configured as a held portion 7c between the support portion 7a and the engagement portion 7b, and the second rotation member 10 is provided.
A protrusion 7d is formed as an engaging protrusion that is pushed to the side.

The holding plate 9 is formed by punching a thin metal plate into a shape set by a press machine. The holding plate 9 has a base 9a having a through hole into which the mounting screw 8 is inserted. A holding portion 9c is formed in which a through hole 9b is formed as a locking recess with which the protrusion 7d of the stop member 7 is engaged. Further, the holding plate 9 is formed by connecting the base portion 9a and the holding portion 9c, and the inner peripheral surface is formed by an arcuate surface having a different radius of curvature, and the plate width is gradually narrowed from the base portion 9a toward the holding portion 9c. Are formed at intervals on the same circumference, and the holding portions 9c are formed between the connecting portions 9d adjacent to each other in the circumferential direction.

In the holding plate 9 having such a shape, after the engaging member 7 is rotatably attached to the inner surface of the flange portion 3b of the first rotating member 3 by the rivet 6, the protrusion 7d of the engaging member 7 is formed.
Are stacked on the inner surface of the flange portion 3b in a state of being fitted into the through hole 9b, and the base portion 9a is fixed to the flange portion 3b by the mounting screw 8. In addition, the holding plate 9 is the engagement member 7
Since the connecting portion 9d is elastically deformed by the plate thickness of the engaging member 7 by being fixed to the flange portion 3b via the interposing portion, the held portion 7c of the engaging member 7 is elastically restored by the connecting portion 9d. Is pressed toward the flange portion 3b.

The first rotating member 3 assembled in this way
Engages the engaging member 7 with the engaging portion 11c of the engaging member 11 connected to the second rotating member 10 via a damper mechanism 12 described later.
By engaging the engaging portion 7b of the second rotating member 10
Connected with.

The second rotating member 10 is composed of a synthetic resin pulley in which the outer ring of the bearing 17 is integrally fixed to the inside in the radial direction by insert molding, and is arranged coaxially with the rotating shaft 2a. Further, the second rotating member 10 has an inner cylindrical portion 10a having an outer peripheral surface of the bearing 17 fixed to the inner peripheral surface thereof, an outer cylindrical portion 10b having a belt groove formed on the outer peripheral surface thereof, an inner cylindrical portion 10a and an outer cylindrical portion 10b. And a plurality of radial ribs 10c that are integrally formed with each other while being spaced apart in the circumferential direction, and a rotary shaft 2a of the adjacent radial ribs 10c.
Of the protruding side, and the inner cylindrical portion 10a and the outer cylindrical portion 1
A plurality of substantially fan-shaped flange portions 10d that connect the protruding side end portions of the rotary shafts 2a of 0b are integrally formed.

The inner cylindrical portion 10a and the outer cylindrical portion 1
0b, a housing portion S surrounded by a pair of radial ribs 10c and a flange portion 10d is provided, and the housing mechanism S is provided with a damper mechanism 12. In such a second rotating member 10, the inner ring of the bearing 17 is fitted to the protruding portion 2b of the compressor 2 so that the snap ring 13 is inserted into the protruding portion 2b.
It is rotatably supported by the housing of the compressor 2 by being locked in the locking groove. Note that reference numeral 10e
Is a circumferential rib that connects the side surfaces of the radial ribs 10c that are adjacent to each other between the adjacent housing portions S, and that also connects the outer peripheral surface of the inner cylindrical portion 10a and the inner peripheral surface of the outer cylindrical portion 10b. Further, reference numeral 10f is a through hole for attaching the locking member 11.

The damper mechanism 12 accommodated in the accommodating portion S of the second rotating member 10 has a damper rubber 14 having a through hole at the center and an outer peripheral surface fitted to the wall surface of the accommodating portion S, and a screw hole at the center. A tubular nut member 15 with a flange is provided. Further, the damper mechanism 12 fits the damper rubber 14 in which the tubular portion of the nut member 15 is inserted into the housing portion S, and inserts the tip of the tubular portion of the nut member 15 into the through hole 10f of the flange portion 10d. By inserting the mounting screw 16 into the screw hole of the nut member 15 with the inner flange portion 11a of the locking member 11 interposed, the accommodation portion S
It is installed inside.

Further, between the outer peripheral surface of the tubular portion of the nut member 15 and the peripheral wall of the through hole 10f of the flange portion 10d, and between the outer peripheral surface of the flange portion of the nut member 15 and the side surface of the radial rib 10c. Is formed in the accommodating portion S so that the damper rubber 14 can be elastically deformed. Further, the inner flange portion 11a of the locking member 11 is in contact with the flange portion 10d by the elastic restoring force of the damper rubber 14.

The locking member 11 is an annular member formed by bending a thin metal plate into an L-shaped cross section, and the inner flange portion 11a connected to the damper mechanism 12 is formed.
And, a cylindrical portion 11b extending from the outer peripheral surface of the inner flange portion 11a to the outer side in the radial direction of the flange portion 3b of the first rotating member 3 is formed. Further, on the inner peripheral surface of the cylindrical portion 11b, the same number of locking portions 11c as the engaging members 7 formed of arcuate grooves with which the engaging portions 7b of the engaging member 7 are engaged are circumferentially spaced. It is formed integrally. Note that reference numeral 11d
Is an arcuate groove formed as a clearance groove for the mounting screw 16.

In the power transmission mechanism 1 of the embodiment having such a structure, the second rotating member 10 is rotatably assembled to the projecting portion 2b of the car air conditioner compressor 2 and the engaging portion 7b of the engaging member 7 is provided. The locking groove 1 of the locking member 11
The first rotary member 3 is spline-fitted to the rotary shaft 2a while being engaged with the rotary shaft 1c, and the bolt 5 is screwed to the rotary shaft 2b, whereby the assembling to the car air-conditioning compressor 2 is completed.

Further, in the power transmission mechanism 1, the held portion 7c of the engaging member 7 causes the flange portion 3b of the first rotating member 3 and the holding portion 9 of the holding plate 9 by the elastic restoring force of the connecting portion 9d of the holding plate 9.
Since it is held between c and c and frictionally coupled to these members, the frictional coupling force causes the second rotary member 10 and the first rotary member 3 to rotate integrally, and the car air-conditioner compressor 2 is driven. In addition, the second rotating member 10 and the locking member 1
Since the damper mechanism 12 is provided between the first rotating member 10 and the first rotating member 10, the impact acting on the friction coupling portion when power is transmitted to the second rotating member 10 and the impact acting on the friction coupling portion due to torque fluctuation during power transmission are provided. Can be absorbed.

Furthermore, when an overload is applied to the rotary shaft 2a, the first rotary member 3 is in a braked state, so
By the power transmitted to the rotating member 10, the engaging member 7
Is rotated about the rivet 6 against the elastic return force of the connecting portion 9d of the holding plate 9, and the engaging portion 7b of the engaging member 7 is disengaged from the engaging portion 11c of the engaging member 11. Therefore, the second
Power transmission from the rotating member 10 to the first rotating member 3 is cut off. In addition, the engaging protrusion 7d of the engaging member 7 separates from the through hole 9b of the holding plate 9 and pops out inside the inner peripheral surface of the holding plate 9, and the rotated engaging member 7 is It is sandwiched between the connecting portion 9d of 9 and the flange portion 3b, and the separated state is maintained.

The power transmission mechanism 1 having such an action
Is a connecting portion 9d that adjoins the engaging member 7 in the circumferential direction.
Since it is sandwiched between the holding portion 9c of the holding plate 9 provided between and the flange portion 3b of the first rotating member 3, the power transmission mechanism 1 can be installed in the car air conditioner regardless of the rotation direction of the second rotating member 10. It can be assembled to the compressor 2 for use.

Next, the present invention will be described with reference to the drawings showing another embodiment. When this type of power transmission mechanism is assembled to the car air-conditioning compressor 2, a gap is formed between the engagement portion 7b of the engagement member 7 and the engagement portion 11c of the engagement member 11 due to a processing error of the parts. Then, when the pressing force in the rotational direction that acts on the engaging portion 7b of the engaging member 7 provided at intervals in the circumferential direction becomes unbalanced, and a load equal to or less than the set value is applied to the rotating shaft 2a. Also, power transmission may be interrupted. In order to solve such a problem, it is necessary to take measures to prevent a gap from being formed between the engaging portion and the locking portion when the power transmission mechanism is assembled to the compressor.

FIG. 5 shows an engaging member shown as another embodiment, (a) is a plan view and (b) is a sectional view. The engagement member 18 of this drawing is formed in a substantially rectangular shape in a plan view, and has a support portion at one end in the longitudinal direction in which a through hole into which the rivet 6 is inserted is bored, and an end surface is formed in a chevron shape in a plan view. An engaging portion at the other end in the longitudinal direction, an engaging plate 18a provided with a to-be-held portion in the longitudinal direction at which a protrusion 18b as an engaging convex portion is formed, and an engaging portion of the engaging plate 18a. A rubber 19 (elastic member) fixed to the outer peripheral surface and press-fitted into the locking portion 11c of the locking member 11 is provided. Therefore, in the power transmission mechanism to which such an engaging member 18 is attached, the engaging portion of the engaging member 18 and the engaging portion 1 of the engaging member 11 are arranged.
Since no gap is formed between the power transmission unit 1c and 1c, power transmission is not interrupted by a load equal to or less than the set value.

FIG. 6 shows an engaging member shown as another embodiment, (a) is a plan view and (b) is a sectional view. The engagement member 20 of this drawing is formed in a substantially rectangular shape in a plan view, and has a first engagement plate 21 formed with a protrusion 21a as an engagement protrusion and a first engagement plate 21 having a similar shape to the first engagement plate 21. Two
The engaging plate 22 and the third engaging plate 23 are overlapped and fixed integrally. In addition, a ring-shaped rubber 24 (elastic member) is fitted on the concave outer peripheral surface. Further, the engaging member 20 has one end in the longitudinal direction as a support portion having a through hole into which the rivet 6 is inserted, the other end in the longitudinal direction as an engaging portion, and a substantially central portion in the longitudinal direction. It is provided as a holding part. Such an engaging member 20 is made of rubber 2
4 is press-fitted into the locking portion 11c of the locking member 11. Therefore, the power transmission mechanism to which the engaging member 20 is attached has the engaging portion of the engaging member 20 and the engaging portion 11 of the engaging member 11.
Since a gap is not formed between c and c, power transmission is not interrupted by a load equal to or less than the set value.

7 (a) to 7 (c) are engagement members shown as another embodiment, and FIG. 7 (a) is a plan view.
(B) is a sectional view and (c) is a rear view. The engaging member 25 in this drawing is formed with a first engaging plate 26 having a substantially rectangular shape in plan view in which a protrusion 26a is formed, and a plate width at the other end in the longitudinal direction that is wider than the plate width of the first engaging plate 26. A second engagement plate 27 (elastic member) having a slit 27a formed at the other end from substantially the center in the longitudinal direction is provided. The engaging member 25 has one end in the longitudinal direction in which a through hole for inserting the rivet 6 is formed as a supporting portion, the other end in the longitudinal direction as an engaging portion, and a substantially central portion in the longitudinal direction. It is provided as a held part. In such an engaging member 25, the engaging portion is press-fitted into the engaging portion 11c of the engaging member 11 in a state where the other end side in the longitudinal direction of the second engaging plate 27 is elastically deformed to reduce the plate width. To be done. Therefore, the engaging member 25
In the power transmission mechanism to which is attached, since no gap is formed between the engaging portion of the engaging member 25 and the engaging portion 11c of the engaging member 11, the power is transmitted by a load equal to or less than the set value. There is no interruption.

Although the power transmission mechanism illustrated as the embodiment has been described above, the power transmission mechanism of the present invention can be used by being assembled in a motor or the like for driving a compressor for a car air conditioner. Further, the engaging member 7 is provided on the side surface of the second rotating member 10 and the locking member 11 is provided on the first rotating member 3, and the locking portion 11c is provided on the outer peripheral surface of the cylindrical portion 11b of the locking member 11. The locking member 7 may be provided outside the cylindrical portion 11b of the locking member 11 in the radial direction. Further, the shapes and materials of the engaging member 7 and the locking member 11 are
The design can be changed as long as the design condition corresponding to the magnitude of the power transmitted to the compressor or the like is satisfied. In addition, when the damper mechanism 12 is not necessary, a configuration in which the second rotating member 10 and the locking member 11 are integrally resin-molded,
A cylindrical locking member projecting from the side surface of the second rotating member 10 in the axial direction and an engaging member having an arc-shaped groove formed in the engaging portion for engaging the cylindrical locking member are provided. For configuration,
The design can be changed.

[0031]

According to the first aspect of the invention, a plurality of flat plate-like engaging members rotatably supported by the supporting member on the side surface of the first rotating member or the side surface of the second rotating member are adjacent in the circumferential direction. And a flat plate-shaped holding plate fixed to the side surface of the first rotating member or the side surface of the second rotating member, the holding portion being provided between the connecting portions, and a member arranged on the second rotating member or the first rotating member. A holding member, and the held portion of the engaging member is held between the side surface of the first rotating member or the side surface of the second rotating member and the holding portion of the holding plate, and when an overload is applied, Since the engaging member is rotated around the support member against the elastic return force of the connecting portion and the engaging portion of the engaging member is disengaged from the engaging portion of the engaging member, the second rotation (EN) Provided is a power transmission mechanism that can be assembled to a compressor or the like regardless of the rotating direction of the members. Can.

According to a second aspect of the present invention, in the first aspect of the present invention, the engaging projection formed on the held portion of the engaging member and the engaging projection formed on the holding portion of the holding plate are engaged with each other. When the engaging concave portion is provided and the engaging portion of the engaging member is disengaged from the engaging portion of the engaging member, the engaging convex portion of the engaging member is located inside the inner peripheral surface of the holding plate or the outer peripheral surface of the retaining plate. Since it is assembled so as to jump out to the outside, the elastic return force of the connecting portion of the holding plate can securely hold the engagement member in the state of being disengaged from the locking portion. Therefore, for example, the engagement member swinging due to external vibration does not come into contact with the locking portion on the side of the second rotating member that is idling due to the interruption of power transmission, and the hitting after the interruption of power transmission is achieved. It is possible to prevent sound generation and damage to the engaging member and the locking member.

In a third aspect of the present invention, in the first and second aspects of the present invention, an annular shape is formed in which the same number of engaging portions as the engaging members are formed on the inner peripheral surface or the outer peripheral surface of the cylindrical portion extending in the axial direction. Since the locking member is provided and the second rotating member or the first rotating member and the locking member are connected to each other via the damper mechanism, the held portion of the engaging member is fixed to the first rotating member or the second rotating member and the holding plate. The damper mechanism can absorb the impact acting on the frictionally coupled portion held between the holding portion and the holding portion.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the engaging member is provided with an elastic member, and the engaging portion is press-fitted into the engaging portion. The pressing force in the rotational direction that acts on each of the provided engaging members becomes uniform, and the power transmission is not interrupted by a load equal to or less than the set value.

[Brief description of drawings]

FIG. 1 is a plan view of a power transmission mechanism.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a rear view of the first rotating member.

FIG. 4 is a plan view of a second rotating member.

FIG. 5 is an engagement member shown as another embodiment, (a) is a plan view and (b) is a sectional view.

FIG. 6 is an engaging member shown as another embodiment, (a) is a plan view and (b) is a sectional view.

FIG. 7 is an engagement member shown as another embodiment, (a) is a plan view, (b) is a sectional view, and (c) is a rear view.

[Explanation of symbols]

3 First rotating member 7 Engagement member 9 holding plate 10 Second rotating member 11 Locking member 12 Damper mechanism 18 Engagement member 20 Engagement member 25 Engaging member

Claims (4)

[Claims] 1. A first rotating member and a second rotating member which are rotatably arranged on a coaxial line, a supporting portion and an engaging portion, and a held portion between the supporting portion and the engaging portion. A plurality of flat plate-like engaging members rotatably supported by a supporting member on a side surface of the first rotating member or a side surface of the second rotating member, and the engaging member holding a held portion of the engaging member. The same number of holding portions as the coupling members, the base portion fixed to the side surface of the first rotating member or the side surface of the second rotating member, and a plurality of elastically deformable plate thickness directions connecting the holding portions and the base portion. A flat plate-shaped holding plate provided with a connecting portion and a holding portion provided between adjacent connecting portions in the circumferential direction, and the same number of the engaging members with which the engaging portions of the engaging members are engaged. An engaging portion is provided, and the second rotating member or the first rotating member is provided.
An engaging member disposed on the rotating member, wherein the held portion of the engaging member is held between the side surface of the first rotating member or the side surface of the second rotating member and the holding portion of the holding plate. When an overload is applied to the first rotating member or the second rotating member, the engaging member is rotated about the supporting member against the elastic return force of the connecting portion of the holding plate, A power transmission mechanism, wherein an engaging portion of the engaging member is disengaged from an engaging portion of the engaging member. 2. The power transmission mechanism according to claim 1, wherein the engagement protrusion formed on the held portion of the engagement member and the engagement protrusion formed on the holding portion of the holding plate engage with each other. When the engaging portion of the engaging member is disengaged from the engaging portion of the engaging member, the engaging convex portion of the engaging member is located inside the inner peripheral surface of the holding plate or in the holding plate. A power transmission mechanism that is assembled so as to project outward from the outer peripheral surface. 3. The power transmission mechanism according to claim 1, wherein an annular shape in which the same number of engaging portions as the engaging members are formed on the inner peripheral surface or the outer peripheral surface of the cylindrical portion extending in the axial direction. The locking member is provided, and the second rotating member or the first rotating member and the locking member are connected via a damper mechanism. 4. The power transmission mechanism according to claim 1, 2 or 3, wherein the engaging member is provided with an elastic member, and the engaging portion is press-fitted into the locking portion. .