JP2022107566A - torque limiter - Google Patents

Abstract

To provide a torque limiter capable of suppressing the rusting and fastening of the torque limiter, and of preventing the transmission of excessive torque even if the torque limiter is rusted and fastened.SOLUTION: A torque limiter 1 includes a clutch cover 10 formed cylindrically and having a screw 10a formed on the inner peripheral face along a rotation axis direction, a clutch disc 20 formed in an annular plate shape, arranged inside the clutch cover 10 coaxially with the clutch cover 10, and having a screw 20a formed on the outer peripheral part along the rotation axis direction and threaded to the screw 10a formed on the inner peripheral face of the clutch cover 10, and a pair of first clutch plate 31 and second clutch plate 32 arranged holding the clutch disc 20 therebetween.SELECTED DRAWING: Figure 3

Description

The present invention relates to torque limiters.

Conventionally, for example, a torque that prevents excessive torque from being input (transmitted) to the drive system by having a clutch that is engaged in a steady state and slipping the clutch when excessive torque is generated during shaft torsion resonance or the like. Limiters are known.

For example, Patent Literature 1 discloses a driving device including an internal combustion engine and an electric motor capable of outputting power to the internal combustion engine via a damper and a torque limiter. In such a drive system, when resonance occurs when the internal combustion engine is started (during motoring), or when excessive torque acts on the torque limiter due to sudden changes in running resistance, etc., the clutch that constitutes the torque limiter is disengaged. The slip prevents excessive torque from being input (transmitted) to the drive system.

Japanese Patent Application Laid-Open No. 2005-233160

By the way, since the clutch that constitutes the torque limiter is engaged in a steady state, it may become stuck due to rust, for example. In particular, in a type in which a dry clutch type torque limiter is arranged between the flywheel and the damper in the bell housing, the clutch tends to stick. Then, when the clutch is stuck, the slipping torque increases, and there is a possibility that the torque input to the drive system increases during shaft resonance or the like. That is, there is a possibility that the input of excessive torque cannot be properly prevented (blocked).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can suppress the rusting of the torque limiter, and even if the torque limiter rusts and sticks, excessive torque is transmitted. An object of the present invention is to provide a torque limiter capable of preventing this.

The torque limiter according to the present invention is formed in a cylindrical shape, a clutch cover having a screw formed on the inner peripheral surface along the direction of the rotation axis, and an annular disc shape formed coaxially with the clutch cover, A clutch disk is arranged inside the clutch cover, and the clutch disk is provided with a screw formed on the outer peripheral portion along the direction of the rotation axis to engage with the screw formed on the inner peripheral surface of the clutch cover. a pair of provided first and second clutch plates; a first biasing member that biases the first clutch plate toward the clutch disc; and a second clutch plate that biases the second clutch plate toward the clutch disc. 2 biasing members.

According to the torque limiter of the present invention, the torque limiter set value (set torque /torque capacity) can be reduced. Therefore, the torque limiter (clutch) starts slipping with a lower torque (slipping torque) than before. Therefore, the chances of the torque limiter (clutch) slipping increase, and rusting and sticking of the torque limiter (clutch) is suppressed. Moreover, even if the torque limiter (clutch) becomes rusty and sticks, the torque limiter (clutch) starts to slip at a torque lower than that in the conventional art, thereby preventing excessive torque from being transmitted. As a result, the rusted fixation of the torque limiter can be suppressed, and even if the torque limiter is rusted and fixed, it is possible to prevent excessive torque from being transmitted.

The torque limiter according to the present invention further includes releasing means for releasing the engagement between the screw formed on the inner peripheral surface of the clutch cover and the screw formed on the outer peripheral portion of the clutch disc. The clutch cover is divided into a plurality of portions along the direction, and the releasing means drives each of the plurality of portions constituting the clutch cover radially and outwardly from the rotation shaft when releasing the screw engagement. is preferred.

In this way, the screw formed on the inner peripheral surface of the clutch cover and the screw formed on the outer peripheral portion of the clutch disc can be disengaged from each other. Therefore, after the torque limiter is actuated, the stopped clutch disc can be returned to the initial position (neutral position) after moving along the screw in the axial direction.

The torque limiter according to the present invention is a clutch disk formed in the shape of an annular plate, and having a screw formed along the direction of the rotation axis on the outer peripheral portion thereof, and is arranged so that the rotation axis of the clutch disk is parallel to the axis. and a shaft having a screw formed along the axial direction on a part of the outer peripheral surface viewed in a cross section perpendicular to the axial direction to engage with a screw formed on the outer peripheral portion of the clutch disc, and the clutch disc. a pair of first and second clutch plates sandwiched between them; a first biasing member that biases the first clutch plate toward the clutch disc; and a second clutch plate that moves toward the clutch disc. and a second biasing member that biases.

According to the torque limiter according to the present invention, the torque limiter set value (set torque) can be reduced. Therefore, the torque limiter (clutch) starts slipping with a lower torque (slipping torque) than before. Therefore, the chances of the torque limiter (clutch) slipping increase, and rusting and sticking of the torque limiter (clutch) is suppressed. Moreover, even if the torque limiter (clutch) becomes rusty and sticks, the torque limiter (clutch) starts to slip at a torque lower than that in the conventional art, thereby preventing excessive torque from being transmitted. As a result, the rusted fixation of the torque limiter can be suppressed, and even if the torque limiter is rusted and fixed, it is possible to prevent excessive torque from being transmitted.

The torque limiter according to the present invention further comprises releasing means for releasing the engagement between a screw formed on a portion of the outer peripheral surface of the shaft and a screw formed on the outer peripheral portion of the clutch disc. No screw is formed in a portion of the outer peripheral surface of the shaft, except for the above-mentioned part, as viewed in cross section, and the release means rotates the shaft to release the outer peripheral surface when the screw is disengaged. It is preferable that the portion where no threads are formed faces the threads formed on the outer peripheral portion of the clutch disc.

By doing so, it is possible to disengage the screw formed on a part of the outer peripheral surface of the shaft and the screw formed on the outer peripheral portion of the clutch disc. Therefore, after the torque limiter is actuated, the stopped clutch disc can be returned to the initial position (neutral position) after moving along the screw in the axial direction.

In the torque limiter according to the present invention, it is preferable that the releasing means is driven in conjunction with the operation of the parking brake.

In this way, in conjunction with the operation of the parking brake, the screw formed on the inner peripheral surface of the clutch cover or the screw formed on a part of the peripheral surface (outer peripheral surface) of the shaft and the outer peripheral surface of the clutch disc The threaded engagement with the screw formed in the portion can be released. That is, the clutch disc can be returned to the initial position (neutral position) in conjunction with the operation of the parking brake (every time the driver operates the parking brake).

According to the present invention, it is possible to prevent the torque limiter from rusting and sticking, and even if the torque limiter rusts and sticking, it is possible to prevent excessive torque from being transmitted.

1 is a sectional view showing the configuration of a torque limiter according to a first embodiment and a powertrain of a hybrid vehicle to which the torque limiter is applied; FIG. It is a figure which shows the whole structure of the torque limiter and release mechanism which concern on 1st Embodiment. FIG. 2 is an enlarged cross-sectional view showing the configuration of the main part of the torque limiter according to the first embodiment; FIG. 4 is an enlarged view showing the configuration of the main part of the torque limiter release mechanism according to the first embodiment; FIG. 10 is a diagram showing the configuration of the main parts of the torque limiter according to the second embodiment (when screwed together); FIG. 7 is a cross-sectional view showing the configuration of the torque limiter and release mechanism according to the second embodiment (at the time of screwing); FIG. 11 is a plan view showing the configuration of the main parts of the torque limiter release mechanism (when screwed together) according to the second embodiment; FIG. 10 is a diagram showing the configuration of the main part of the torque limiter according to the second embodiment (at the time of release); FIG. 7 is a cross-sectional view showing the configuration of a torque limiter and a release mechanism (at the time of release) according to the second embodiment; FIG. 10 is a plan view showing the configuration of the main part of the torque limiter release mechanism (at the time of release) according to the second embodiment;

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. In the drawings, the same reference numerals are used for the same or corresponding parts. Further, in each figure, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

(First embodiment)
First, the configuration of the torque limiter 1 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. FIG. 1 is a cross-sectional view showing a configuration of a torque limiter 1 and a powertrain of a hybrid vehicle (HEV) to which the torque limiter 1 is applied. FIG. 2 is a diagram showing the overall configuration of the torque limiter 1 and the releasing mechanism (release mechanism) 50. As shown in FIG. FIG. 3 is a cross-sectional view showing an enlarged configuration of a main part of the torque limiter 1. As shown in FIG. FIG. 4 is an enlarged view showing the configuration of the main part of the release mechanism 50 of the torque limiter 1. As shown in FIG. Note that FIG. 1 shows an example in which the torque limiter 1 is applied to the power train of a series-parallel hybrid vehicle. Further, since the torque limiter 1 is rotationally symmetrical, only the upper half of the torque limiter 1 is illustrated in FIG. 3 and the like.

A crankshaft 100 of an engine (not shown) is connected to a powertrain input shaft 140 via a flywheel 110 that absorbs engine rotation fluctuations, a torque limiter 1 that prevents input (transmission) of excessive torque, and a damper 130. It is connected to the. That is, torque limiter 1 is interposed between flywheel 110 and damper 130 .

The torque limiter 1 mainly includes a clutch cover 10 connected to a crankshaft 100 via a flywheel 110, a clutch disk 20 connected to an input shaft 140 of a power train via a damper 130, and a clutch disk 20. A pair of clutch plates (a first clutch plate 31 and a second clutch plate 32) are arranged (arranged) as follows.

The clutch cover 10 is formed in a bottomless cylindrical shape. Further, the cross section of the clutch cover 10 is formed in a square bracket shape ([ ]). Clutch disc 20 is formed in the shape of an annular plate, and is arranged inside (internal space) of clutch cover 10 coaxially with clutch cover 10 .

The clutch disc 20, the first clutch plate 31, and the second clutch plate 32 are arranged coaxially and parallel to each other.

A first clutch facing 21 is attached to one surface of the clutch disc 20 . The first clutch facing 21 is, for example, a dry friction member formed in the shape of an annular plate. The clutch disk 20 and the first clutch plate 31 are arranged coaxially with the first clutch facing 21 and opposed to each other so as to sandwich the first clutch facing 21 . The first clutch facing 21 and the first clutch plate 31 are slidable.

Similarly, a second clutch facing 22 is attached to the other side of the clutch disc 20 . The second clutch facing 22 is, for example, a dry friction member formed in the shape of an annular plate. The second clutch plate 32 is arranged coaxially with the second clutch facing 22 and facing the clutch disk 20 with the second clutch facing 22 interposed therebetween. The second clutch facing 22 and the second clutch plate 32 are slidable.

Between the first clutch plate 31 and the first support plate 11 slidably provided on the clutch cover 10, there are axially spaced between the clutch disc 20 (first clutch facing 21) and the first clutch plate. 31 (that is, urges the first clutch plate 31 toward the clutch disc 20). equivalent to ) is interposed.

Similarly, between the second clutch plate 32 and the second support plate 12 slidably provided on the clutch cover 10, axially and between the clutch disc 20 (second clutch facing 22) and the second clutch disc 20 (second clutch facing 22) A second disc spring 42 (a second biasing force described in the claims) that applies a biasing force in a direction in which the second clutch plate 32 is engaged (biasing the second clutch plate 32 toward the clutch disc 20). (equivalent to a member) is interposed.

In particular, the torque limiter 1 can prevent the torque limiter 1 (the first and second clutch facings 21 and 22) from sticking with rust. It has a function to prevent it from being transmitted.

Therefore, a screw (female screw) 10a is formed along the rotation axis direction on the inner peripheral surface of the clutch cover 10 formed in a cylindrical shape. Further, a screw (male screw) 20a is formed along the direction of the rotating shaft on the outer peripheral portion of the clutch disk 20 which is formed in the shape of an annular plate. It is

Therefore, when excessive torque is input to the torque limiter 1, the clutch discs 20 (first and second clutch facings 21, 22) slip and rotate, and move in the axial direction. Then, it stops when the input of excessive torque subsides. Therefore, the axial length of the screw 10a formed on the inner peripheral surface of the clutch cover 10 is set in consideration of the magnitude (amplitude), duration, etc. of excessive torque, such as during shaft torsional resonance. . For example, the axial length of the screw 10a formed on the inner peripheral surface of the clutch cover 10 is such that when an excessive torque such as shaft torsion resonance is input, the clutch disc 20 is positioned at the end (stopper) of the screw 10a. or until the first and second disc springs 41 and 42 are crushed (that is, they are set so as not to hit the stopper). Further, the set torque of the torque limiter 1 is lowered by the amount of friction between the screw 10a on the clutch cover 10 side and the screw 20a on the clutch disk 20 side.

In order to return the clutch disc 20 that has moved axially and stopped to the initial position (neutral position), a screw 10a formed on the inner peripheral surface of the clutch cover 10 and a screw 20a formed on the outer peripheral portion of the clutch disc 20 are used. A release mechanism (release mechanism) 50 (corresponding to the release means described in the claims) is provided for releasing (releasing) the screwing.

More specifically, first, the clutch cover 10 is divided into a plurality of parts (for example, three parts every 120°) along the circumferential direction. Then, the release mechanism 50 releases (spreads) the plurality of portions forming the clutch cover 10 radially and outwardly from the rotation shaft (rotation center), thereby releasing the engagement of the two screws.

The release mechanism 50 is configured to be driven in conjunction with actuation (operation) of a parking brake (parking brake/side brake) 51, for example.

More specifically, the parking brake 51 is connected to one end of a plate-shaped or rod-shaped release lever (release lever) 52 by, for example, a wire. When the parking brake 51 is pulled, the release lever 52 rotates (swings) about the fulcrum 52a, and the other end moves a release bearing (release bearing) 53 and a release cam (release cam) 54 in the axial direction. Drive (extrude).

Here, the release bearing 53 and the release cam 54 are formed in an annular shape (cylindrical shape). Further, the release cam 54 is formed such that the inner surface side of the distal end thereof is tapered so as to widen toward the distal end.

On the other hand, for example, inverted triangular grooves are formed at the joints of the clutch cover 10 divided into three parts at intervals of 120° (that is, grooves are formed at intervals of 120° along the circumferential direction). A spherical release ball (release ball) 55 is arranged in each of the three grooves. At that time, the release ball 55 is in contact with the tapered surface at the tip of the release cam 54 .

Therefore, when the parking brake 51 is pulled and the release cam 54 is axially driven (pushed out), the release ball 55 is pushed radially inward by the tapered surface and pushed into the groove of the clutch cover 10 . As a result, the clutch cover 10 is driven outward (opened). As a result, the screw 10a formed on the inner peripheral surface of the clutch cover 10 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 are disengaged, and the clutch disc 20, which had moved and stopped, It is returned to the initial position (neutral position) by the spring force of the first disk spring 41 or the second disk spring 42 .

With the configuration described above, when excessive torque is generated, the clutch discs 20 (the first and second clutch facings 21 and 22) slide (slip), thereby applying excessive torque to the power train. Input (transmission) is prevented.

In addition, with the configuration as described above, the torque limiter is reduced by the friction of the threaded portion between the screw 10a formed on the inner peripheral surface of the clutch cover 10 and the screw 20a formed on the outer peripheral portion of the clutch disc 20. 1 set value (set torque/torque capacity) can be lowered. Therefore, the torque limiter 1 (clutch) starts slipping with a torque (starting torque) lower than that in the conventional art. Therefore, the chances of the torque limiter 1 (clutch) slipping increase, and rusting and sticking of the torque limiter 1 (clutch) is suppressed. Further, even if the torque limiter 1 (clutch) is rusted and stuck, the torque limiter 1 (clutch) starts to slip with a torque lower than that in the conventional art, thereby preventing excessive torque from being transmitted.

As described in detail above, according to the present embodiment, it is possible to prevent the torque limiter 1 from being rusted and fixed, and even if the torque limiter 1 is rusted and fixed, excessive torque is transmitted. It is possible to prevent this. Further, according to the present embodiment, since the torque input to the power train (driving system) at the time of resonance is reliably reduced, it is possible to reduce the size, weight, and cost of the power train.

Furthermore, according to this embodiment, the threaded engagement between the screw 10a formed on the inner peripheral surface of the clutch cover 10 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 can be released. Therefore, after the torque limiter 1 is actuated, the clutch disc 20, which has moved in the axial direction along the screw 10a and is stopped, can be returned to the initial position (neutral position).

In particular, according to this embodiment, the screw 10a formed on the inner peripheral surface of the clutch cover 10 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 are interlocked with the operation (actuation) of the parking brake 51. can be unscrewed. That is, in conjunction with the operation (activation) of the parking brake 51 (every time the driver operates the parking brake 51), the clutch disc 20 can be returned to the initial position (neutral position).

(Second embodiment)
Next, a torque limiter 2 according to a second embodiment will be described with reference to FIGS. 5 to 10 as well. FIG. 5 is a diagram showing the configuration of the main parts of the torque limiter 2 (at the time of screwing). FIG. 6 is a cross-sectional view showing the configuration of the torque limiter 2 and the releasing mechanism (release mechanism) 70 (when they are screwed together). FIG. 7 is a plan view showing the configuration of the main parts of the torque limiter 2 (at the time of screwing). FIG. 8 is a diagram showing the configuration of the main part of the torque limiter 2 (at the time of release). FIG. 9 is a cross-sectional view showing the configuration of the torque limiter 2 and the release mechanism (release mechanism) 70 (at the time of release). FIG. 10 is a plan view showing the configuration of the main parts of the torque limiter 2 (when released). 5 to 10, the same reference numerals are assigned to the same or equivalent components as in the first embodiment.

In the torque limiter 1 according to the first embodiment described above, a screw (female screw) 10a is formed on the inner peripheral surface of the clutch cover 10 along the rotation axis direction. Instead of the clutch cover 10 having the screw 10a formed on the inner peripheral surface, the torque limiter 2 according to the second embodiment is arranged so that the axis is parallel to the rotation axis of the clutch disc 20, and the torque limiter 2 is perpendicular to the axial direction. A shaft (shaft) 60 formed with a screw 60a that engages with a screw 20a formed on the outer peripheral portion of the clutch disc 20 along the axial direction is formed on a part of the circumferential surface (outer peripheral surface) when viewed in cross section. is different from the above-described first embodiment.

When viewed in a cross section perpendicular to the axial direction of the shaft 60, no screws are formed in a portion (other portion) excluding a portion of the circumferential surface (outer peripheral surface) where the screws 60a are formed. A release shaft (release shaft) 60B is connected to the end of the shaft 60, and the two form an L-shaped link.

As in the first embodiment, a screw (male screw) 20a is formed along the rotation axis direction on the outer peripheral portion of the clutch disk 20 formed in the shape of an annular plate. , detailed description is omitted here.

When an excessive torque is input to the torque limiter 2, the clutch discs 20 (first and second clutch facings 21, 22) slip, rotate, and move in the axial direction. Then, it stops when the input of excessive torque subsides. Therefore, the axial length of the screw 60a formed on the shaft 60 is set in consideration of the magnitude (amplitude), duration, and the like of excessive torque, such as during axial torsional resonance. For example, the axial length of the screw 60a formed on the shaft 60 is set so that the clutch disc 20 does not move to the end (stopper) of the screw 60a when excessive torque such as shaft torsion resonance is input. Alternatively, the first and second disc springs 41 and 42 are set so as not to move (that is, so as not to hit the stopper) until they are crushed. Also, the set torque of the torque limiter 1 is lowered by the amount of friction between the screw 60a on the shaft 60 side and the screw 20a on the clutch disk 20 side.

In order to return the clutch disc 20 that has moved in the axial direction and stopped to the initial position (neutral position), a screw 60a formed on a part of the circumference surface (outer circumference surface) of the shaft 60 and a screw 60a on the outer circumference of the clutch disc 20 A release mechanism 70 (corresponding to release means described in the claims) is provided for releasing screw engagement with the formed screw 20a.

More specifically, as described above, the portion (other portion) of the shaft 60 excluding a portion of the circumferential surface (outer peripheral surface) on which the screw 60a is formed is not provided with screws. The release mechanism 70 rotates the shaft 60 so that the portion (surface) of the circumferential surface (outer peripheral surface) on which the screw 60a is not formed faces the screw 20a formed on the outer peripheral portion of the clutch disc 20 (opposes it). ) to release the engagement of the two screws.

The release mechanism 70 is configured to be driven in conjunction with the operation (activation) of the parking brake (parking brake/side brake) 51, for example.

More specifically, similarly to the above-described first embodiment, the parking brake 51 is connected to one end of the release lever 52 by, for example, a wire. When the parking brake 51 is pulled, the release lever 52 rotates (rocks) about the fulcrum 52a, and the other end drives (extrudes) the release cam 72 in the axial direction (toward the clutch disc 20). .

Here, the release cam 72 is formed with a small-diameter first cylindrical portion, a tapered portion with one end connected to the first cylindrical portion, and a large-diameter second cylindrical portion connected with the other end of the tapered portion along the axial direction. It is That is, the taper portion becomes thinner (the diameter becomes smaller) as it approaches the first cylindrical portion side, which has a smaller diameter, from the second cylindrical portion side, which has a larger diameter.

When the parking brake 51 is not operated, the end (base end) of the release shaft 60B (L-shaped link) is in contact with the side surface of the small-diameter first cylindrical portion of the release cam 72, and the shaft 60 is released. A screw 60a formed on a portion of the circumferential surface (outer peripheral surface) and a screw 20a formed on the outer peripheral portion of the clutch disc 20 are screwed together.

On the other hand, when the parking brake 51 is pulled (operated) and the release cam 72 is driven (pushed out) in the axial direction (toward the clutch disc 20), the end of the release shaft 60B (L-shaped link) is pushed out. is pushed by the side surface (tapered surface) of the tapered portion of the release cam 72, and the release shaft 60B rotates (swings). As a result, the shaft 60 rotates, and the part (surface) where the screw 60a is not formed on the circumferential surface (outer peripheral surface) of the shaft 60 faces (opposes) the screw 20a formed on the outer peripheral portion of the clutch disc 20. By doing so, both screws are disengaged. As a result, the screw 60a formed on the circumferential surface (outer peripheral surface) of the shaft 60 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 are disengaged, and the clutch disc that has moved and stopped is released. 20 is returned to the initial position (neutral position) by the spring force of the first disk spring 41 or the second disk spring 42 .

Other configurations are the same as or similar to those of the above-described first embodiment, and detailed description thereof will be omitted here.

According to the present embodiment, the friction of the threaded portion between the screw 60a formed on a part of the circumferential surface (outer peripheral surface) of the shaft 60 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 is equal to the torque. The set value (set torque/torque capacity) of the limiter 2 can be lowered. Therefore, the torque limiter 2 (clutch) starts slipping with a torque lower than that in the conventional art. Therefore, the chances of the torque limiter 2 (clutch) slipping increase, and rusting and sticking of the torque limiter 2 (clutch) is suppressed. Further, even if the torque limiter 2 (clutch) is rusted and stuck, the torque limiter 2 (clutch) starts to slip with a torque lower than that in the conventional art, thereby preventing excessive torque from being transmitted. As a result, it is possible to prevent the torque limiter 2 from being rusted and fixed, and even if the torque limiter 2 is rusted and fixed, it is possible to prevent excessive torque from being transmitted. That is, the present embodiment can also achieve the same effect as the torque limiter 1 according to the first embodiment described above.

Further, according to the present embodiment, the screw 60a formed on a portion of the circumferential surface (outer peripheral surface) of the shaft 60 and the screw 20a formed on the outer peripheral portion of the clutch disc 20 are disengaged. can be done. Therefore, after the torque limiter 2 is actuated, the stopped clutch disc 20 can be returned to the initial position (neutral position) after moving in the axial direction along the screw 60a.

Furthermore, according to the present embodiment, the screw 60 a formed on a part of the circumferential surface (outer peripheral surface) of the shaft 60 and the outer peripheral portion of the clutch disc 20 are interlocked with the operation (activation) of the parking brake 51 . The threaded engagement with the formed screw 20a can be released. That is, in conjunction with the operation (driving) of the parking brake 51 (every time the driver operates the parking brake 51), the clutch disc 20 can be returned to the initial position (neutral position).

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible. For example, in the above-described embodiment (example of FIG. 1), the torque limiter 1 according to the present invention is applied to the powertrain (drive system) of a series parallel hybrid vehicle (HEV). Parallel hybrid vehicles, etc.) and externally chargeable plug-in hybrid vehicles (PHEV). Also, the torque limiter 1 according to the present invention may be applied to a conventional vehicle having an engine and a transmission (not having an electric motor).

In the first embodiment, the clutch cover 10 is divided into three parts (three divisions), but the number of divisions is not limited to three, and may be divided into four or more, for example.

In the above embodiment, the parking brake 51 and one end of the release lever 52 are connected by a wire. By doing so, the clutch disc 20 can be similarly returned to the initial position (neutral position).

Reference Signs List 1, 2 torque limiter 10 clutch cover 10a screw 11 first support plate 12 second support plate 20 clutch disk 20a screw 21 first clutch facing 22 second clutch facing 31 first clutch plate 32 second clutch plate 41 first disk spring 42 second disc spring 50 release mechanism 51 parking brake 52 release lever 53 release bearing 54 release cam 55 release ball 60 shaft 60B release shaft 60a screw 70 release mechanism 72 release cam

Claims (5)

a clutch cover formed in a cylindrical shape and having a screw formed on the inner peripheral surface along the direction of the rotation axis;
Screws are formed in the shape of an annular plate, are arranged inside the clutch cover coaxially with the clutch cover, and are formed on the inner peripheral surface of the clutch cover along the direction of the rotating shaft on the outer peripheral portion. a clutch disc having mating threads;
a pair of first and second clutch plates arranged to sandwich the clutch disc;
a first biasing member biasing the first clutch plate toward the clutch disc;
and a second biasing member that biases the second clutch plate toward the clutch disc. further comprising releasing means for releasing a screw formed on the inner peripheral surface of the clutch cover and a screw formed on the outer peripheral portion of the clutch disc,
The clutch cover is divided into a plurality of parts along the circumferential direction,
2. The torque limiter according to claim 1, wherein the releasing means drives each of the plurality of portions constituting the clutch cover radially outwardly from the rotating shaft when releasing the engagement of the screw. . a clutch disc formed in the shape of an annular plate and having a screw formed on the outer peripheral portion along the direction of the rotation axis;
It is arranged so that the rotational axis of the clutch disc is parallel to the axis, and is formed along the axial direction on the outer peripheral portion of the clutch disc on a part of the outer peripheral surface when viewed in a cross section perpendicular to the axial direction. a shaft having a screw that engages with the screw;
a pair of first and second clutch plates arranged to sandwich the clutch disc;
a first biasing member biasing the first clutch plate toward the clutch disc;
and a second biasing member that biases the second clutch plate toward the clutch disc. further comprising releasing means for releasing a threaded engagement between a screw formed on a portion of the outer peripheral surface of the shaft and a screw formed on the outer peripheral portion of the clutch disc,
The shaft has no threads formed on a portion of the outer peripheral surface excluding the part when viewed in a cross section perpendicular to the axial direction,
The releasing means rotates the shaft to turn the portion of the outer peripheral surface where no screw is formed to the screw formed on the outer peripheral portion of the clutch disc when releasing the screw engagement. 4. A torque limiter according to claim 3. 5. The torque limiter according to claim 2, wherein said releasing means is driven in conjunction with actuation of a parking brake.

Images