JP2003049865A - Torque limiter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque limiter capable of obtaining stable releasing torque even when it is applied in either rotary direction. SOLUTION: A torque limiter 15 can interrupt the excessive transmission of torque from an engine E to a compressor C by breaking it at a breaking part 24 (25). The breaking parts 24, 25 are provided independently in a manner that they are in the upper and lower flow relationship in a power transmission passage wherein the part 24 is for clockwise rotation that functions when the limiter 15 rotates in a clockwise direction and the part 25 is for counterclockwise rotation that functions when it rotates in a counterclockwise direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged, for example, on a power transmission path between a drive source and a rotary machine to transmit a rotational force, and to transmit an excessive torque to a fracture of a fracture portion. The present invention relates to a torque limiter configured to cut off the electric power.

[0002]

2. Description of the Related Art In a torque limiter of this type, a breaking portion is formed so as to be able to handle whether the output shaft of a drive source is rotating clockwise or counterclockwise. That is, the conventional torque limiter cuts off the transmission of excessive torque by breaking the same breaking portion regardless of the rotation direction of the power transmission path to which it is applied.

[0003]

However, at the breaking portion, the direction of the force acting when the rotation direction of the power transmission path is clockwise and the direction of the force acting when the rotation direction is counterclockwise. Is different from. Therefore, if the breaking portion is set to have a breaking characteristic that is suitable for a force acting in the case of clockwise rotation, for example, there is a problem that the breaking characteristic becomes unsuitable in the case of counterclockwise rotation. Will end up. Therefore, the breaking characteristic of the breaking portion must be set to a halfway value in any rotation direction, and the release torque of the torque limiter (the torque at which the breaking portion breaks when this value is exceeded) becomes unstable. Was becoming.

If a torque limiter for clockwise rotation and a torque limiter for counterclockwise rotation are prepared and appropriately selected and applied according to the rotation direction of the power transmission path, the above-mentioned problem (release) Torque is unstable) can be solved. However, it is expensive to prepare a dedicated torque limiter according to the rotation direction, and it is troublesome to select the torque limiter in the power transmission path.

An object of the present invention is to provide a torque limiter capable of obtaining a stable release torque regardless of which rotation direction is applied.

[0006]

In order to achieve the above object, the invention of claim 1 is arranged on a power transmission path so as to be able to transmit a rotational force and to transmit an excessive torque to a breaking portion. In the torque limiter configured to cut off by breaking, the breaking portion is a one-way breaking portion that mainly functions when power transmission is performed by rotation in one direction, and when the power transmission is performed by rotation in the other direction. The torque limiter is characterized in that the breaking portion for the other direction that mainly functions is provided separately.

The torque limiter having this structure can be applied regardless of whether the power transmission path rotates in one direction or the other. Therefore, it is not necessary to prepare a dedicated torque limiter for each rotation direction, and the cost of the power transmission path configuration can be reduced.

Further, the torque limiter is separately provided with a one-way breaking portion which mainly functions when the rotation direction of the power transmission path is one direction and another one-way breaking portion which mainly functions when the rotation direction of the power transmission path is one direction. ing. Therefore, the breakage characteristics of each breakage portion can be set appropriately and the release torque of the torque limiter can be stabilized. The term “mainly functions” of the fractured part means that the fractured part is first broken when the transmission torque becomes excessive.

According to a second aspect of the present invention, in the first aspect, the one-direction breaking portion and the other-direction breaking portion are arranged so as to have an upstream / downstream relationship in the power transmission path, and the power transmission is in one direction. In the case of rotation by, the power transmission can be interrupted only by breaking the one-way breaking portion,
When the power transmission is performed by rotation in the other direction, it is characterized in that the power transmission can be interrupted only by breaking the other-direction breaking portion.

In this structure, the interruption of the power transmission by the torque limiter depends only on the breaking characteristics of one of the breaking portions, and the other breaking portion has almost no influence. Therefore, the release torque of the torque limiter can be further stabilized.

According to a third aspect of the present invention, in the second aspect, the first rotating body located upstream of the power transmission path and the first rotating body are provided.
The second rotating body located on the downstream side of the rotating body is integrally rotatable by a connecting portion that connects both rotating bodies in a bridging manner. The one-way breaking portion and the other-direction breaking portion The parts are characterized by being provided in the same connecting part.

In this configuration, the number of connecting portions can be reduced and the configuration of the torque limiter can be simplified as compared with the case where each breaking portion is provided in a separate connecting portion.
According to a fourth aspect of the present invention, in the third aspect, the vicinity of the one-way breaking portion in the connecting portion has a shape inclined toward one direction of rotation from the second rotating body toward the first rotating body. The vicinity of the breaking portion for the other direction in the connecting portion is characterized in that the second rotating body is inclined toward the other direction of rotation from the second rotating body toward the first rotating body.

In this structure, the tensile stress is mainly applied to one of the fractured portions, and the compressive stress is mainly applied to the other fractured portion. The fracture is weaker for tensile stress than compressive stress. Therefore, when the transmission torque becomes excessively large, only one of the fractured portions to which the tensile stress is applied can be reliably fractured, and the reliability of the operation of the torque limiter is improved.

The invention of claim 5 limits the preferred embodiments other than claim 2 in claim 1. That is, the one-way breaking portion and the other-direction breaking portion are arranged in parallel in the power transmission path, and in the case where power transmission is performed by rotation in one direction, the one-way breaking portion is broken. After that, the power transmission can be interrupted by breaking the other-direction breaking portion, and in the case where the power transmission is performed by rotation in the other direction, it is possible that the one-direction breaking portion is broken after the other-direction breaking portion is broken. This is a configuration in which power transmission can be interrupted by breaking the direction breaking portion.

According to a sixth aspect of the present invention, in the fifth aspect, the first rotating body located upstream of the power transmission path and the first rotating body are provided.
The second rotating body located on the downstream side of the rotating body is integrally rotatable by a connecting portion that connects both rotating bodies in a bridging manner, and a plurality of the connecting portions are provided. The breaking portion for the direction and the breaking portion for the other direction are provided in different connecting portions, respectively.

In this structure, the one-way breaking portion and the other-direction breaking portion are provided in different connecting portions. Therefore,
The shape of each connecting portion is simplified, and the torque limiter is easily manufactured.

According to a seventh aspect of the present invention, in the sixth aspect, a preferable aspect of the connecting portion is limited. The connecting portion provided with the one-way breaking portion has a shape inclined toward one direction of rotation from the second rotating body toward the first rotating body, and the connecting portion having the other-way breaking portion is provided. The part is characterized in that it has a shape that is inclined toward the other direction of rotation from the second rotating body toward the first rotating body.

In this structure, the tensile stress is mainly applied to one of the fractured portions, and the compressive stress is mainly applied to the other fractured portion. The fracture is weaker for tensile stress than compressive stress. Therefore, when the transmission torque becomes excessively large, one of the fractured portions to which the tensile stress is applied can be surely fractured first, and the reliability of the operation of the torque limiter is improved.

The invention of claim 8 is claim 3, 4, 6 or 7.
In the above, the connecting portion, the first rotating body, and the second rotating body are disc-shaped as a whole. In this configuration, the shape of the torque limiter is simple and its manufacture is easy.

The invention of claim 9 is claim 3, 4 or 6-8.
In any one of the above, a plurality of the connecting portions are provided, and a reinforcing portion that connects the adjacent connecting portions so as to bridge the avoiding broken portions is provided.

In this structure, the strength of the portions other than the fractured portion in each connecting portion is increased, and the stress concentration in each fractured portion can be further ensured during power transmission. That is, when the transmission torque becomes excessive, the corresponding breakage portion can be reliably broken, and the reliability of the operation of the torque limiter is improved.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, first to third embodiments in which the torque limiter of the present invention is applied to a power transmission path between an engine and a compressor in a vehicle air conditioner will be described. In addition, in the second and third embodiments, only the differences from the first embodiment will be described, and the same or corresponding members will be denoted by the same reference numerals and description thereof will be omitted.

First Embodiment (Power Transmission Path) As shown in FIG. 1, a rotor 12 is rotatably supported via a bearing 13 in a housing 11 of a compressor C that constitutes a refrigeration cycle. The rotor 12 is operatively connected to a drive shaft 14 connected to a compression mechanism (not shown) of the compressor C via a torque limiter 15. A belt 16 connected to an output shaft of an engine E, which is a drive source for driving the vehicle, is wound around the rotor 12. Therefore, the power (rotational force) of the engine E is the belt 16, the rotor 12, and the torque limiter 1.
By being transmitted to the drive shaft 14 via 5, the refrigerant gas is compressed by the compression mechanism.

The torque limiter 15 has a structure capable of interrupting the transmission of excessive torque from the engine E to the compressor C. As the torque limiter 15, a break type is used in which a part of the power transmission path is broken by the action of excessive torque.

(Structure of Torque Limiter) As shown in FIGS. 1 and 2, the torque limiter 15 has a ring-shaped outer peripheral portion 21 as a first rotating body, and a center disposed inside the outer peripheral portion 21. It has an inner peripheral portion 22 as a second rotating body having a mounting hole 22a, and a connecting portion 23 for connecting the outer peripheral portion 21 and the inner peripheral portion 22 in a bridging manner. The torque limiter 15 is made of metal, and the outer peripheral portion 21, the inner peripheral portion 22 and the connecting portion 23 are integrally formed by metal sintering or the like, and have a disc shape as a whole.

The torque limiter 15 is bolted to the drive shaft 14 so as to be integrally rotatable with the mounting hole 22a of the inner peripheral portion 22. The torque limiter 15 is
It is operatively connected to the rotor 12 by an outer peripheral portion 21.
Therefore, the power from the engine E is transmitted to the outer peripheral portion 21 via the rotor 12 and also transmitted from the outer peripheral portion 21 to the inner peripheral portion 22 via the connecting portion 23 to rotate the drive shaft 14.

A plurality of the connecting portions 23 (three places in this embodiment) are provided at equal intervals around the axis L of the drive shaft 14. An intermediate portion of each of the connecting portions 23 extends in the circumferential direction of the torque limiter 15 and has a "V" shape as a whole. In the connecting portion 23, a clockwise rupture portion 24 as a unidirectional rupture portion is provided on the inner peripheral portion 22 side with the intermediate portion as a boundary, and an outer peripheral portion 21 side as a directional fracture portion. The counterclockwise breaking portion 25 is provided.

The vicinity of the clockwise breaking portion 24 of the connecting portion 23 is inclined toward the clockwise direction in FIG. 2 from the inner peripheral portion 22 toward the outer peripheral portion 21. The vicinity of the counterclockwise breaking portion 25 in the connecting portion 23 is inclined toward the counterclockwise direction in FIG. 2 from the inner peripheral portion 22 toward the outer peripheral portion 21.

Therefore, when the torque limiter 15 rotates in the clockwise direction, a tensile stress is mainly applied to the breakage portion 24 for clockwise rotation with the inner peripheral portion 22, and the counterclockwise movement is performed. A compressive stress is mainly applied to the breakage portion 25 for rotation with the outer peripheral portion 21. On the contrary, when the torque limiter 15 rotates in the counterclockwise direction, tensile stress mainly acts between the counterclockwise breaking portion 25 and the outer peripheral portion 21, and the counterclockwise breaking portion 25 is rotated clockwise. Compressive stress is mainly applied to the fractured portion 24 between the fractured portion 24 and the inner peripheral portion 22.

(Operation of Torque Limiter) When the transmission torque from the engine E to the drive shaft 14 becomes excessive due to deadlock or the like in the compression mechanism of the compressor C, the torque limiter 15 is connected to the connecting portions 23. The tensile stress and the compressive stress acting between the outer peripheral portion 21 and the inner peripheral portion 22 are also excessive. The fractured portions 24 and 25 of each connecting portion 23 are weaker against tensile stress than compressive stress. Therefore, when the torque limiter 15 is rotated in the clockwise direction, the broken portion 24 for clockwise rotation is
In the case of rotation in the counterclockwise direction, the counterclockwise breaking portion 25 is broken due to excessive stress concentration at the boundaries with the corresponding peripheral portions 21 and 22, respectively.

That is, in the present embodiment, the breakage portion 24,
Reference numeral 25 denotes a clockwise breaking portion 24 that functions only when the torque limiter 15 is rotated in the clockwise direction, and a counterclockwise breaking portion 25 that functions only when rotating in the counterclockwise direction. The power transmission paths are separately provided so as to have an upstream / downstream relationship.

The torque limiter 15 in which one of the breaking portions 24 and 25 is broken in each connecting portion 23 is divided into an outer peripheral portion 21 side and an inner peripheral portion 22 side. Therefore, the rotor 12 can rotate relative to the drive shaft 14, and the transmission of excessive torque is blocked. Therefore, it is possible to prevent the compressor E from being excessively increased by the engine E, and thus to prevent the engine from stalling.

The present embodiment having the above-mentioned structure has the following effects. (1) The torque limiter 15 has a configuration that can be applied regardless of whether the rotation direction of the power transmission path, that is, the rotation direction of the engine E is clockwise or counterclockwise. Therefore, it is not necessary to prepare a dedicated torque limiter for each rotation direction, and the cost of the power transmission path configuration can be reduced.

Further, in the torque limiter 15, a clockwise breaking portion 24 that functions when the rotational direction of the power transmission path is clockwise and a counterclockwise breaking portion 25 that functions when it is counterclockwise. It is provided separately. Therefore, the breakage characteristics of the breakage portions 24 and 25 can be set individually and suitably, and the release torque of the torque limiter 15 can be stabilized.

(2) In the torque limiter 15, the broken portion 24 for clockwise rotation and the broken portion 25 for counterclockwise rotation are arranged so as to have an upstream / downstream relationship with the power transmission path. Therefore, the power transmission can be interrupted only by breaking one of the breaking portions 24 (25). That is, the torque limiter 15
The interruption of the power transmission due to is dependent only on the breaking characteristics of the one breaking portion 24 (25), and the other breaking portion 25 (24) is hardly affected. Therefore, the release torque of the torque limiter 15 can be further stabilized.

(3) In the torque limiter 15, the broken portion 24 for clockwise rotation and the broken portion 25 for counterclockwise rotation are provided on the same connecting portion 23. Therefore, each fractured part 24, 25
It is possible to reduce the number of connecting portions 23 and simplify the configuration of the torque limiter 15, as compared with the case where the respective connecting portions 23 are provided.

(4) The vicinity of the broken portion 24 for clockwise rotation in the connecting portion 23 is inclined clockwise from the inner peripheral portion 22 toward the outer peripheral portion 21. The vicinity of the counterclockwise breaking portion 25 of the connecting portion 23 is inclined counterclockwise. Therefore, the tensile stress is mainly applied to one of the fractured portions 24 (25), and the compressive stress is mainly applied to the other fractured portion 25 (24). Therefore, when the transmission torque becomes excessively large, only one of the fractured portions 24 (25) to which the tensile stress is applied can be reliably fractured, and the reliability of the operation of the torque limiter 15 is improved.

(5) In the torque limiter 15, the connecting portion 23, the outer peripheral portion 21 and the inner peripheral portion 22 are disc-shaped as a whole. Therefore, the shape of the torque limiter 15 is simplified and its manufacture is facilitated.
Further, it is advantageous for downsizing the compressor C including it in the direction of the axis L.

Second Embodiment As shown in FIG. 3, in the present embodiment, the reinforcing portion 27 is bridged between the intermediate portions of the adjacent connecting portions 23 so as to avoid the break portions 24 and 25. It is provided. Therefore, the strength of the intermediate portion of each connecting portion 23 increases,
It is possible to more reliably concentrate the stress on the fractured portions 24 and 25 during power transmission. That is, when the transmission torque becomes excessive, the corresponding break portions 24 and 25 can be reliably broken, and the reliability of the operation of the torque limiter 15 is improved.

In this embodiment, the same effects as (1) to (5) of the first embodiment can be obtained. Third Embodiment As shown in FIG. 4, in the present embodiment, the connecting portion 23
Are provided twice as many as in the first embodiment (six locations), and each connecting portion 23 has a substantially linear shape. Half of the plurality of connecting portions 23 (23A) are inclined clockwise from the inner peripheral portion 22 toward the outer peripheral portion 21, and the rest (23B) are from the inner peripheral portion 22 to the outer peripheral portion. Two
It is inclined toward the counterclockwise direction toward 1.

The broken portion 24 for clockwise rotation is a connecting portion 23A.
And the counterclockwise breaking portion 25 is provided in the connecting portion 23B. That is, the breakage portion 24 for clockwise rotation and the breakage portion 25 for counterclockwise rotation are provided in different connecting portions 23A and 23B, respectively. Therefore, both break parts 24 and 25 are arranged in parallel in the power transmission path.

Each of the connecting portions 23A and 23B has a narrow width near the boundary with the inner peripheral portion 22.
Therefore, in the vicinity of the boundary with the inner peripheral portion 22 in each of the connecting portions 23A and 23B, the break portions 24 and 25 are formed.

Now, assume that the torque transmitted from the engine E to the drive shaft 14 becomes excessive. Here, for example, in the case where the power transmission is performed by the clockwise rotation of the torque limiter 15, the clockwise breaking portion 24 is first broken by the action of tensile stress. After the breakage of the clockwise breaking portion 24, the counterclockwise breaking portion 25, which bears all the power transmission, is broken by the action of the compressive stress, so that the power transmission is interrupted. That is, when the power transmission is performed by the clockwise rotation of the torque limiter 15, the clockwise breaking portion 24 mainly functions and the counterclockwise breaking portion 25 functions as a subsidiary. Become.

On the contrary, when the power transmission is performed by the counterclockwise rotation of the torque limiter 15, first, the counterclockwise breaking portion 25 is broken by the action of tensile stress. After the breakage of the counterclockwise breaking portion 25, the breakage for clockwise rotation 24, which is responsible for all the power transmission, is broken by the compressive stress, so that the power transmission is interrupted. That is, the power transmission is the torque limiter 1
In the case where it is made by the rotation of 5 in the counterclockwise direction, the counterclockwise breaking portion 25 mainly functions and the clockwise breaking portion 24 functions as a subordinate.

In the present embodiment having the above-mentioned configuration, the first
The same effects as (1) and (5) of the embodiment are achieved. In addition, the following effects are achieved. (1) Broken portion 24 for clockwise rotation and broken portion 25 for counterclockwise rotation
Are provided in different connecting portions 23A and 23B, respectively. Therefore, the shapes of the connecting portions 23A and 23B are simplified (substantially linear in this embodiment), and the torque limiter 1
5 can be easily manufactured.

(2) The connecting portion 23A provided with the clockwise breaking portion 24 is inclined in the clockwise direction from the inner peripheral portion 22 toward the outer peripheral portion 21. The connecting portion 23B provided with the counterclockwise breaking portion 25 is inclined toward the counterclockwise direction from the inner peripheral portion 22 toward the outer peripheral portion 21.
Therefore, the tensile stress is mainly applied to one of the fractured portions 24 (25), and the compressive stress is mainly applied to the other fractured portion 25 (24). Therefore, when the transmission torque becomes excessive, one of the fractured portions 2 on which the tensile stress acts is applied.
4 (25) can be reliably broken first, and the reliability of the operation of the torque limiter 15 is improved.

The following modes can also be implemented without departing from the spirit of the present invention. As shown in FIG. 5, the inner peripheral portion 22 of the torque limiter 15
A cylindrical portion 28 having a screw hole 28a is projectingly provided. A screw portion 14a is formed at the end of the drive shaft 14, and the screw portion 14a
And the tubular portion 28 (screw hole 28a) are screwed together,
The torque limiter 15 and the drive shaft 14 are integrally rotatably fixed. With this configuration, bolts are not required to fix the torque limiter 15 and the drive shaft 14, and the number of parts can be reduced.

In the first or second embodiment, the connecting portions 23 are not limited to being provided at three places, but may be provided at one, two, four, five or six places, for example. .

The connecting portion 23 in the third embodiment.
Is not limited to being provided at 6 locations, but may be provided at 2, 3, 4, 5, 7 or 8 locations, for example.

-Modifying the third embodiment, each connecting portion 2
In 3A and 23B, the width near the boundary with the outer peripheral portion 21 is reduced to provide the fractured portions 24 and 25 near the boundary.

In the third embodiment, the intermediate portions of the adjacent connecting portions 23A and 23B are bridge-connected by the reinforcing portion 27 as in the second embodiment. The power transmission path to which the torque limiter 15 can be applied is not limited to between the engine E and the compressor C in the vehicle air conditioner, and may be, for example, an engine E and a hydraulic pump for a vehicle brake assist device. Between the engine E and the hydraulic pump for the power steering device,
It may be between the engine E and the air pump for the air suspension device.

The torque limiter 15 of each of the above embodiments
Is applied to a power transmission path of a type in which the upstream and downstream relationships of power transmission are reversed. Here, for example, the rotation direction of power transmission is set to the clockwise direction. When the power transmission is performed from the outer peripheral portion 21 to the inner peripheral portion 22 in the torque limiter 15, the clockwise breaking portion 24 mainly functions (breaks), so that excessive torque is transmitted. Be cut off. On the contrary, when the upstream and downstream relationships of power transmission are reversed and this power transmission is performed from the inner peripheral portion 22 to the outer peripheral portion 21 in the torque limiter 15, the counterclockwise breaking portion 25 mainly functions. The transmission of excessive torque is interrupted by (breaking). That is, the torque limiter of the present invention can be applied to a power transmission path of a type in which the upstream and downstream relationships of power transmission are reversed, and in this case also, the same effects as those of the above-described respective embodiments are exhibited.

The technical idea that can be understood from the above embodiment will be described. (1) In a torque limiter configured to be arranged on a power transmission path in which the upstream and downstream relations of power transmission are reversed so as to be able to transmit a rotational force and to cut off excessive torque transmission by breaking the breaking portion. The breaking portion is one breaking portion that mainly functions when the upstream and downstream relationships of power transmission are in a certain relationship,
A torque limiter characterized by being provided separately with another breakage portion which mainly functions when the upstream / downstream relationship of power transmission is reversed from the certain relationship.

(2) A compressor that constitutes a refrigeration cycle of an air conditioner for a vehicle and that compresses a refrigerant gas by being driven by a traveling drive source of the vehicle, and transmits power to and from the traveling drive source. A compressor comprising the torque limiter according to any one of claims 1 to 9 on a path.

[0055]

According to the present invention having the above structure, the torque limiter can be applied regardless of the rotation direction of the power transmission path. Therefore, it is not necessary to prepare a dedicated torque limiter for each rotation direction, and the cost of the power transmission path configuration can be reduced.

Further, the torque limiter is separately provided with a one-way breaking portion that mainly functions when the rotation direction of the power transmission path is one direction and another-direction breaking portion that mainly functions when the power transmission path rotates in the other direction. ing. Therefore, the breakage characteristics of each breakage portion can be set individually and appropriately, and the release torque of the torque limiter can be stabilized.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a compressor including a torque limiter.

FIG. 2 is a front view showing a torque limiter taken out.

FIG. 3 is a front view of a torque limiter according to a second embodiment.

FIG. 4 is a front view of a torque limiter according to a third embodiment.

FIG. 5 is an enlarged cross-sectional view of a main part of a compressor including a torque limiter of another example.

[Explanation of symbols]

15 ... Torque limiter, 24 ... Clockwise breaking portion as one-way breaking portion, 25 ... Counterclockwise breaking portion as other-direction breaking portion.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaki Ota             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Inside Toyota Toyota Industries (72) Inventor Taku Yasaya             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Inside Toyota Toyota Industries (72) Inventor Takayasu Suzuki             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Inside Toyota Toyota Industries (72) Inventor Takeshi Kawada             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Inside Toyota Toyota Industries

Claims (9)

[Claims] 1. A torque limiter arranged on a power transmission path, capable of transmitting a rotational force, and interrupting transmission of an excessive torque by breaking a breaking portion, wherein the breaking portion is a power transmitting member. Is separately provided with the one-way breaking portion that mainly functions when the rotation is performed in one direction and the other-direction breaking portion that mainly functions when the power transmission is performed by rotation in the other direction. A characteristic torque limiter. 2. The one-way breaking portion and the other-direction breaking portion are arranged so as to have an upstream / downstream relationship in the power transmission path, and in the case where power transmission is performed by rotation in one direction. Means that the power transmission can be interrupted only by breaking the one-way breaking portion, and when the power transmission is performed by rotation in the other direction, the power is simply broken by breaking the other-direction breaking portion. The torque limiter according to claim 1, which has a configuration capable of interrupting transmission. 3. A first rotating body located upstream of the power transmission path and a second rotating body located downstream of the first rotating body.
The rotating body is integrally rotatable by a connecting portion that connects both rotating bodies in a bridging manner, and the one-direction breaking portion and the other-direction breaking portion are provided in the same connecting portion. The torque limiter according to Item 2. 4. The connecting portion has a shape in the vicinity of the one-direction breaking portion that is inclined toward one direction of rotation from the second rotating body toward the first rotating body, and at the same connecting portion for the other direction. The torque limiter according to claim 3, wherein a portion near the breaking portion is shaped to be inclined in the other direction of rotation from the second rotating body toward the first rotating body. 5. The one-way breaking portion and the other-direction breaking portion are arranged in parallel in a power transmission path, and in the case where the power transmission is performed by rotation in one direction, the one-way breaking portion. If the power transmission can be interrupted by breaking the other direction breaking part after the part is broken and the power transmission is performed by rotation in the other direction, the other direction breaking part is broken. The torque limiter according to claim 1, wherein the torque limiter is configured to be capable of interrupting power transmission by breaking the one-way breaking portion after the breaking. 6. A first rotating body located upstream of the power transmission path and a second rotating body located downstream of the first rotating body.
The rotating body is integrally rotatable by a connecting portion that connects both rotating bodies in a bridging manner, and the connecting portion is provided with a plurality, and the one-direction breaking portion and the other-direction breaking portion are The torque limiter according to claim 5, wherein the torque limiters are provided in different connecting portions. 7. The connecting portion provided with the one-direction breaking portion has a shape that is inclined toward one direction of rotation from the second rotating body toward the first rotating body, and the other-direction breaking portion. The torque limiter according to claim 6, wherein the connecting portion provided with is shaped to be inclined in the other direction of rotation from the second rotating body toward the first rotating body. 8. The torque limiter according to claim 3, wherein the connecting portion, the first rotating body, and the second rotating body have a disc shape as a whole. 9. A plurality of the connecting portions are provided, and a reinforcing portion is provided to connect adjacent connecting portions so as to bridge the avoiding breakage portions. The torque limiter described in any one of 1.