JP2023144954A - Interrupter - Google Patents

Abstract

To provide an interrupter that can properly switch the state between a state where rotors can rotate integrally and a state where rotors can rotate relatively.SOLUTION: A first intermittence mechanism 210 includes: sprags 286, 287 disposed between a first driven gear 184 and a second shaft 182; and an operation rod 241 for operating the sprags 286, 287 to an engagement state where the first driven gear 184 and the second shaft 182 can rotate integrally and operating the sprags 286, 287 to a non-engagement state where the first driven gear 184 and the second shaft 182 can rotate relatively.SELECTED DRAWING: Figure 22

Description

The present invention relates to an interrupter.

BACKGROUND ART Conventionally, there has been known an intermittent device that switches between a state in which rotating bodies can rotate together and a state in which they can rotate relative to each other. Such disconnecting devices are used in vehicle drive devices, working parts of working machines, joint devices for prosthetic legs, etc. (for example, Patent Document 1).

International Publication No. 2021/040039

The interrupter is required to be able to appropriately switch between the two states described above depending on the situation.

The present invention provides an interrupter that can appropriately switch between a state in which rotating bodies can rotate together and a state in which they can rotate relative to each other.

The disconnection device of the present invention includes:
an engager disposed between the first rotating body and the second rotating body;
The engager is placed in an engaged state in which the first rotating body and the second rotating body can rotate together, and in a non-engaged state in which the first rotating body and the second rotating body can rotate relative to each other. and an operation section to be operated.

According to the disconnection device of the present invention, it is possible to appropriately switch between a state in which the rotating bodies can rotate integrally with each other and a state in which they can rotate relative to each other.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electrically powered prosthetic leg equipped with an interrupting device according to an embodiment of the present invention, viewed diagonally from the front. FIG. 2 is an exploded perspective view of the electric prosthesis shown in FIG. 1; It is a perspective view of a telescopic device. FIG. 2 is a cross-sectional view of the electric prosthesis of FIG. 1; FIG. 3 is a cross-sectional view of the expansion and contraction device. FIG. 2 is a sectional view of a main part showing a bent state of the electric prosthetic leg shown in FIG. 1. FIG. FIG. 2 is a cross-sectional view of a main part of the electrically powered prosthetic leg shown in FIG. 1 in a maximum flexed state. It is a sectional view of a two-way clutch. FIG. 9 is a perspective view showing an example of the retainer shown in FIG. 8 (including rollers, guides, and rubber balls). FIG. 9 is a perspective view showing another example of the retainer shown in FIG. 8 (including rollers and rubber balls). FIG. 6 is a diagram showing the operation of the operating mechanism, (A) is a diagram showing a state in which the first interrupting part and the second interrupting part are off, and (B) is a diagram showing a state in which the first interrupting part is OFF and the second interrupting part is ON. (C) is a diagram showing a state in which the first interrupting section is on and the second interrupting section is off. (A) is a sectional view showing a state in which the second interrupting portion is off, and (B) is a view showing the position of the operating rod at that time. (A) is a sectional view showing a state in which the second interrupting portion is operated from off to on, and (B) is a view showing the position of the operating rod at that time. (A) is a sectional view showing the normal rotation on state of the second interrupting portion, and (B) is a view showing the position of the operating rod at that time. (A) is a sectional view showing a reverse ON state of the second interrupting portion, and (B) is a view showing the position of the operating rod at that time. (A) is a sectional view showing a state in which the second interrupting portion is operated from on to off, and (B) is a view showing the position of the operating rod at that time. (A) to (F) are diagrams showing the movements of a human and an electric prosthetic leg when ascending the stairs. FIG. 3 is a diagram illustrating the movements of a human and an electric prosthetic leg when ascending a step, walking on a flat surface, and descending a step. FIG. 7 is a cross-sectional view showing a normal rotation on state in the interrupting portion of the first modification. FIG. 7 is a cross-sectional view showing a reverse-on state in the interrupting portion of the first modification. FIG. 7 is a cross-sectional view showing an off state of the interrupting portion of the first modification. FIG. 7 is a cross-sectional view showing an on state of the interrupting portion of the second modification. FIG. 7 is a cross-sectional view showing an off state of the interrupting portion of the second modification. It is a perspective view which shows the interruption part of a 2nd modification. 1 is a schematic diagram of a vehicle drive device equipped with a disconnection device according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric prosthetic leg equipped with an interrupting device according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the front-back direction, left-right direction, and up-down direction are defined based on the user of the electric prosthetic leg. In the drawings, the front of the electric prosthesis is shown as Fr, the rear as Rr, the left side as L, the right side as R, the upper side as U, and the lower side as D.

As shown in FIGS. 1 to 5, the electric prosthetic leg 1 of this embodiment is a prosthetic leg that is attached to the leg of a person without a knee, and includes a lower knee member 110 located below the knee, and a lower knee member 110 located below the knee. A knee joint mechanism 130 that connects an above-knee member 120 that is attached to the knee and is located above the knee, and a knee joint mechanism 130 that connects the below-knee member 110 and the above-knee member 120 so that the angle formed by the above-knee member 120 can be changed; A telescopic device 140 that can change the angle formed by the above-knee side member 120, a mechanical stop mechanism 150 that mechanically limits the range of change of the angle formed between the below-knee side member 110 and the above-knee side member 120, and the mechanical stop mechanism 150. It includes a buffer mechanism 160 that buffers shock, and a battery B that supplies power to the expansion and contraction device 140 and the like.

The above-knee member 120 includes an adapter 121 connected to a socket (not shown). The socket is a joint member provided on the thigh, and by connecting the adapter 121 to the socket, the above-knee member 120 is integrated with the thigh.

The below-knee member 110 includes a box-shaped main frame 111 that is open at the top and rear, side covers 112 that cover both left and right sides of the main frame 111, and a removable rear cover 113 that covers the rear opening of the main frame 111 so that it can be opened and closed. and.

The above-knee member 120 is provided at the upper part of the main frame 111 via a rotating part 135 that constitutes the knee joint mechanism 130, and the leg part 114 extending downward is provided at the lower part of the main frame 111.

As shown in FIGS. 3 to 5, the telescopic device 140 is connected to a motor M that outputs rotational power, a transmission T that transmits the power of the motor M, and a transmission T that can transmit power. A unit case 250 that unitizes the spindle unit SP that converts the rotational power output from the unit into translational motion (telescopic motion), the first disconnection mechanism 210 and the second disconnection mechanism 220 provided in the transmission T, and the telescopic device 140. and.

The motor M is arranged behind and above the transmission T, and the spindle unit SP is arranged in front of and above the transmission T. The motor M is a gear mechanism built-in motor that includes a motor main body 171 and a gear mechanism 172 that reduces the output rotation of the motor main body 171. The spindle unit SP includes a spindle 173 formed with a male thread and a sleeve 174 formed with a female thread. As the spindle 173 rotates, the sleeve 174 moves in translation along the axis of the spindle 173.

Specifically, the spindle 173 receives the rotational power of the motor M transmitted by the transmission T and performs rotational motion. On the other hand, the sleeve 174 is supported by the unit case 250 so as to be non-rotatable and movable up and down. Therefore, when the spindle 173 rotates to one side in response to the rotational power of the motor M transmitted by the transmission T, the sleeve 174 is translated away from the transmission T, and when the spindle 173 rotates to the other side, the sleeve 174 rotates to the other side. 174 is translated so as to approach the transmission T. Note that translational movement of the sleeve 174 away from the transmission T is sometimes referred to as an extension operation of the spindle unit SP, and conversely, translational movement of the sleeve 174 toward the transmission T is referred to as an extension operation of the spindle unit SP. This is sometimes called a reduction operation.

That is, the distance between the sleeve 174 and the transmission T expands or contracts depending on the rotational direction of the spindle 173. The upper end of the sleeve 174 is connected to the above-knee member 120 via a link member 175. By expanding and contracting the distance between the sleeve 174 and the transmission T in accordance with the rotational direction of the spindle 173, the below-knee member 110 and the above-knee member 120 rotate around the rotating portion 135. This changes the angle formed by the above-knee member 120 and the below-knee member 110. If the angle formed by the above-knee side member 120 and the below-knee side member 110 is the acute angle between the acute angle side and the obtuse side angle, when the formed angle becomes larger, the knee joint mechanism 130 extends, and the formed angle becomes smaller. Sometimes the knee joint mechanism 130 bends.

The transmission T includes a first transmission mechanism T1 that transmits the power of the motor M to the spindle unit SP at a first transmission ratio, and a first transmission mechanism T1 that transmits the power of the motor M to the spindle unit SP at a second transmission ratio different from the first transmission ratio. A second transmission mechanism T2 is provided. The first transmission mechanism T1 and the second transmission mechanism T2 are switched between a power cutoff state and a power connection state by disconnection mechanisms 210 and 220.

According to such a transmission T, by providing two power transmission paths with different gear ratios, it is possible to switch the operating speed and generated power of extension and flexion in the knee joint mechanism 130. The first speed change ratio and the second speed change ratio may be different as long as they are different, and one of the first speed change mechanism T1 and the second speed change mechanism T2 may be a speed reduction mechanism and the other speed increase mechanism, or either One may be a constant velocity mechanism and the other may be a speed reduction mechanism or a speed increase mechanism, both may be a speed reduction mechanism, or both may be a speed increase mechanism.

The first gear ratio is the rotation speed after shifting, which is the rotation speed of the opposite motor M side (spindle unit SP side) in the first transmission mechanism T1, with respect to the rotation speed before shifting, which is the rotation speed of the motor M side in the first transmission mechanism T1. It is a ratio of numbers. The second gear ratio is the rotation speed after shifting, which is the rotation speed on the opposite motor M side (spindle unit SP side) in the second transmission mechanism T2, relative to the rotation speed before shifting, which is the rotation speed on the motor M side in the second transmission mechanism T2. It is a ratio of numbers.

For example, when the first speed ratio of the first speed change mechanism T1 is smaller than 1, the rotation speed on the side opposite to the motor M (spindle unit SP side) decreases compared to the rotation speed on the motor M side, and the torque increases. When the second speed ratio of the second speed change mechanism T2 is larger than 1, the rotation speed on the side opposite to the motor M (spindle unit SP side) increases more than the rotation speed on the motor M side, and the torque decreases. In this embodiment, the first speed change ratio is set to be smaller than 1, the second speed change ratio is set to be larger than 1, and the first speed change mechanism T1 is arranged below the second speed change mechanism T2.

The first transmission mechanism T1 and the second transmission mechanism T2 include a first shaft 181 rotatably arranged on the downward extension of the output shaft 172a of the gear mechanism section 172, and a first shaft 181 rotatably arranged on the downward extension of the spindle 173 of the spindle unit SP. A second shaft 182 that is rotatably arranged is included. The first shaft 181 is integrally rotatably connected to the output shaft 172a of the gear mechanism section 172 of the motor M via a coupling 187 that allows an axial center error. The second shaft 182 is integrally rotatably connected to the spindle 173 of the spindle unit SP. Note that the second shaft 182 of this embodiment is integrated with the spindle 173 of the spindle unit SP, but the second shaft 182 is connected to the spindle 173 of the spindle unit SP using spline fitting or coupling. You may.

The first transmission mechanism T1 includes a first drive gear 183 and a first driven gear 184 that mesh with each other. The first drive gear 183 is rotatably supported by the first shaft 181, and the first driven gear 184 is rotatably supported by the second shaft 182. The rotation axes of the first driven gear 184 and the second shaft 182 coincide with each other. Moreover, they are arranged so that at least a portion of them overlap each other when viewed in an orthogonal direction perpendicular to the axis of rotation. In other words, they are arranged such that at least a portion of each is located on the same plane orthogonal to the axis of rotation. The first transmission mechanism T1 of this embodiment is a deceleration transmission mechanism in which the first drive gear 183 has a smaller diameter than the first driven gear 184, and can extend and retract the spindle unit SP at low speed and high torque.

The second transmission mechanism T2 includes a second drive gear 185 and a second driven gear 186 that mesh with each other. The second drive gear 185 is supported by the first shaft 181 so as to be integrally rotatable, and the second driven gear 186 is supported by the second shaft 182 so as to be relatively rotatable. The second driven gear 186 and the second shaft 182 have the same rotational axis. Moreover, they are arranged so that at least a portion of them overlap each other when viewed in an orthogonal direction perpendicular to the axis of rotation. In other words, they are arranged such that at least a portion of each is located on the same plane orthogonal to the axis of rotation. The second transmission mechanism T2 of this embodiment is a speed increasing transmission mechanism in which the second drive gear 185 has a larger diameter than the second driven gear 186, and can extend and contract the spindle unit SP at high speed and with low torque. . In this embodiment, the second transmission mechanism T2 is arranged above the first transmission mechanism T1, but the second transmission mechanism T2 may be arranged below the first transmission mechanism T1. That is, the first driven gear 184 and the second driven gear 186 only need to be located at different positions in the rotational axis direction. Furthermore, although the first shaft 181 and the second shaft 182 of this embodiment are each formed integrally from the beginning, it is also possible to form the upper and lower gear support parts as separate bodies and then integrally connect (combine) them. good.

The first disconnection mechanism 210 includes a first disconnection section 212 provided between the first driven gear 184 and the second shaft 182, and an operation mechanism 240 that switches the first disconnection section 212. The second disconnection mechanism 220 includes a second disconnection section 222 provided between the second driven gear 186 and the second shaft 182, and an operation mechanism 240 that switches the second disconnection section 222. These intermittent parts 212 and 222 have a common configuration and can be switched between a cutoff state in which power transmission is cut off and a power transmission enabled state in which rotational power in both one direction and the other direction can be transmitted. It is composed of Note that details of the intermittent parts 212 and 222 will be described later.

The operating mechanism 240 includes an operating rod 241 that is capable of intermittent operation of the intermittent parts 212 and 222, and a servo motor 242 that linearly moves the operating rod 241.

The second shaft 182 is a hollow shaft having an internal space S2 extending in the rotational axis direction (also referred to as the vertical direction), and the operating rod 241 is disposed in the internal space S2. The operating rod 241 is provided with a rack 241a at its lower end exposed from the internal space S2. The operating rod 241 is supported by bearings B4 and B5 disposed in the internal space S2 so that it cannot rotate relative to the rack 241a and can move forward and backward integrally in the direction of the rotation axis. A lid member 188 having an insertion hole through which the operating rod 241 is inserted is screwed into the lower end of the second shaft 182 . The lid member 188 prevents foreign matter from entering the internal space S2 and facilitates replacement of the operating rod 241. A pinion 243 provided on an output shaft 242a of a servo motor 242 is engaged with the rack 241a, and the vertical position of the operating rod 241 is switched in accordance with the drive of the servo motor 242. Small diameter portions 241b1, 241b2 and large diameter portions 241c1 to 241c3, which will be described later, are formed on the outer circumference of the operating rod 241. operates the intermittent parts 212 and 222 intermittently. Note that details of the operating mechanism 240 will be described later.

As shown in FIGS. 3 to 5, the unit case 250 includes an upper case 251, a middle case 252, and a lower case 253.

The upper case 251 has a cylindrical shape that covers the outer circumferential side of the spindle unit SP, and supports the sleeve 174 of the spindle unit SP in a non-rotatable and vertically movable manner via a bush 254 provided on the inner circumferential side of the upper end thereof. . Further, a flange portion 251a extending outward is provided at the lower end portion of the upper case 251. Upper case 251 is fastened to the front and upper side of middle case 252 by a plurality of screws N1 passing through flange portion 251a from above.

Middle case 252 rotatably supports the upper end side of first shaft 181 via bearing B1, and rotatably supports the upper end side of second shaft 182 via bearing B2. An upper case 251 is fastened to the front and above the middle case 252, and a motor M is fastened to the back and above the middle case 252. Motor M is fastened to middle case 252 by a plurality of screws N2 passing through middle case 252 from below (inside). Moreover, a lower flange 252a for fastening the lower case 253 and a pair of upper flanges 252b for fixing to the main frame 111 are provided on the outer circumference of the middle case 252.

Lower case 253 is fastened to the lower part of middle case 252 by a plurality of screws N3 passing through lower flange 252a of middle case 252 from above. The lower case 253 not only covers the lower side and the sides of the transmission T, but also rotatably supports the lower end side of the first shaft 181 via the bearing B3.

According to such a unit case 250, the three-stage structure of the upper case 251, middle case 252, and lower case 253 not only makes it possible to casing the transmission T and spindle unit SP, but also unitizes the telescoping device 140 including the motor M. This makes it possible to reduce the number of parts and reduce weight.

Furthermore, the unit case 250 is attached to the main frame 111 via one upper bracket 256 and a pair of middle brackets 257, as shown in FIG. The upper bracket 256 supports the upper end of the upper case 251 on the front wall of the main frame 111, and the pair of middle brackets 257 supports the pair of upper flanges 252b formed on both left and right sides of the middle case 252 on the main frame 111. Supported on the left and right side walls of the

For example, if the expansion device 140 is assembled after the upper bracket 256 and middle bracket 257 are attached to the main frame 111 side, by placing the pair of upper flanges 252b of the middle case 252 on the pair of middle brackets 257, Since the telescopic device 140 can be temporarily held on the main frame 111, the work of fastening the middle case 252 to the middle bracket 257 and the work of fastening the upper case 251 to the upper bracket 256 are facilitated. Further, the removal operation of the expansion/contraction device 140 by performing the reverse procedure is also facilitated.

Furthermore, since the upper case 251 and the middle case 252 receive a higher load than the lower case 253, they are fastened to the main frame 111 via the upper bracket 256 and the middle bracket 257 to support the transmission T and spindle unit SP. Not only can the strength be increased, but the rigidity of the lower case 253 can be lowered and the weight can be reduced.

4 shows the electric prosthetic leg 1 in an extended state, FIG. 6 shows the electric prosthetic leg 1 in a bent state, and FIG. 7 shows the electric prosthetic leg 1 in a maximum bent state. Note that while walking with the electric prosthetic leg 1, the maximum flexion state shown in FIG. 7 does not occur.

As shown in FIGS. 4, 6, and 7, the mechanical stop mechanism 150 includes a stopper member 151 provided on the below-knee member 110, and a first contact portion 152 and a second contact portion provided on the above-knee member 120. 153. In the state shown in FIG. 4, the first contact portion 152 contacts the stopper member 151, thereby restricting the knee joint mechanism 130 from bending in the opposite direction. Further, in the state shown in FIG. 7, the second contact portion 153 contacts the stopper member 151, thereby restricting the knee joint mechanism 130 from further bending from the maximum bending state.

The buffer mechanism 160 is provided on the above-knee member 120 side, and includes a pressing portion 162 that can press the upper end of the link member 175 with the urging force of a spring 161 (for example, a compression coil spring). A lower end portion of the link member 175 is rotatably connected to the sleeve 174 of the spindle unit SP via a first rotating portion 176, and an upper end portion of the link member 175 is connected to the above-knee member 120 via a second rotating portion 177. are rotatably connected via. A cam portion 178 is formed at the upper end of the link member 175. The cam portion 178 has a small diameter outer circumferential portion 178a having a small diameter centered on the second rotating portion 177, a large diameter outer circumferential portion 178b having a long distance from the second rotating portion 177, a small diameter outer circumferential portion 178a, and a large diameter outer circumferential portion. 178b and a connecting outer circumferential portion 178c that connects the connecting portions 178b without a step.

As shown in FIGS. 6 and 7, when the knee joint mechanism 130 is bent, the pressing portion 162 faces the small diameter outer peripheral portion 178a of the cam portion 178, so the pressing portion 162 and the cam portion 178 are separated from each other. ing. As shown in FIG. 4, when the knee joint mechanism 130 extends in response to the contraction operation of the spindle unit SP and approaches the mechanical stop position on the extension side, the opposing position of the pressing part 162 and the cam part 178 moves to the connecting outer peripheral part 178c. As the cam portion 178 moves from the large diameter outer peripheral portion 178b to the large diameter outer peripheral portion 178b, the cam portion 178 comes into contact with the pressing portion 162, and the large diameter outer peripheral portion 178b pushes the pressing portion 162 against the biasing force of the spring 161. In other words, the cam portion 178 is pressed in the return direction by the urging force of the spring 161. As a result, the biasing force of the spring 161 acts as resistance, and the impact when the first contact portion 152 contacts the stopper member 151 is buffered.

Next, details of the interrupting parts 212, 222 and the operating mechanism 240 will be explained with reference to FIG. 8 and subsequent figures.

Each of the intermittent parts 212 and 222 has a common configuration and can be switched between a cutoff state in which power transmission is cut off and a power transmission enabled state in which rotational power in both one direction and the other direction can be transmitted. configured. Each disconnecting section 212, 222 of this embodiment is configured using a two-way clutch 280 with a forced release function, as shown in FIG. The two-way clutch 280 includes a plurality of rollers 281 (three in this embodiment) disposed between the outer circumferential surface of the second shaft 182 and the inner circumferential surface of the gears 184 and 186, and a plurality of rollers 281 arranged in a predetermined manner. a retainer 282 held at intervals; a plurality of (three in this embodiment) pins 283 that penetrate the second shaft 182 in the radial direction and are operated by the operating mechanism 240 to a forced free position and a forced free release position; A plurality of (three in this embodiment) guides 284 are provided on the retainer 282 and define the relative rotational position of the retainer 282 with respect to the second shaft 182 when the pin 283 is in the forced free position. Note that the roller 281 may be a ball or a sprag.

A radial distance A between the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the gears 184 and 186 is smaller than the diameter B of the roller 281. Further, flat portions 182a are formed on the outer peripheral portion of the second shaft 182 at predetermined intervals in the circumferential direction, and the interval A is larger than the diameter B at the center side of the flat portion 182a in the circumferential direction.

That is, when the roller 281 is held at the circumferential center of the flat portion 182a, the roller 281 does not engage with the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the gears 184 and 186 (disengaged state), Relative rotation between the two shafts 182 and the gears 184 and 186 is allowed (forced free state).

On the other hand, in a state in which the roller 281 is allowed to move in the circumferential direction relative to the second shaft 182, the roller 281 meshes with the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the gears 184 and 186 (engaged state). The shaft 182 and the gears 184 and 186 are connected to be rotatable together in two directions (forced free release state).

As shown in FIG. 9, the retainer 282 has a ring shape that is rotatable relative to the second shaft 182 and the gears 184, 186, and includes a plurality of roller holding parts 282a that hold the rollers 281 and a guide 284. It has a plurality of guide holding parts 282b. In other words, the retainer 282 is provided adjacent to the roller 281 in the circumferential direction with respect to the rotation axis.

Furthermore, a plurality of rubber balls 282c are embedded in the outer peripheral surface of the retainer 282 at predetermined intervals in the circumferential direction. These rubber balls 282c create appropriate friction between the gears 184, 186 and the retainer 282, thereby preventing unintended idling in the forced free release state. Note that the member that generates friction between the gears 184, 186 and the retainer 282 is not limited to the rubber balls 282c, but may be an O-ring. Furthermore, although the rubber ball 282c and O-ring are effective in preventing slippage, they can also be omitted.

Returning to FIG. 8, the pin 283 has a conical convex portion 283a at its radially outer end, and the guide 284 has a conical convex portion 283a that fits (engages) with the convex portion 283a at its radially inner end surface. It has a recess 284a. When the convex portion 283a of the pin 283 fits into the concave portion 284a of the guide 284, the relative rotational position of the retainer 282 with respect to the second shaft 182 is positioned at a predetermined position where the retainer 282 is in a forced free state due to the guiding action of the pin 283 and the guide 284. Ru. Furthermore, as shown in FIG. 10, instead of the recess 284a of the guide 284, a V-groove 282d extending along the axial direction may be formed in the inner circumference of the retainer 282. By doing so, not only can the number of parts and assembly steps be reduced by making the guide 284 unnecessary, but also an error in the axial direction of the pin 283 can be tolerated.

As shown in FIG. 11, the operating rod 241 includes, in order from above, a first large diameter portion 241c1, a first small diameter portion 241b1, a second large diameter portion 241c2, a second small diameter portion 241b2, and a third large diameter portion 241c3. They are formed at predetermined lengths and intervals. The operating rod 241 is provided to be able to control the two interrupting parts 212 and 222 simultaneously, but may be provided separately for each of the interrupting parts 212 and 222. Further, although the operating rod 241 of this embodiment is integrally formed from the beginning, it may be formed separately for each of the interrupting portions 212 and 222 and then integrally connected (combined). Furthermore, although the operating rod 241 of this embodiment changes the position of the roller 281 via the pin 283, the guide 284, and the retainer 282, the position of the roller 281 is changed directly by the pin 283 without using the guide 284 and the retainer 282. It can also be applied to modified examples.

In the following description, the operation of the operating mechanism 240 that simultaneously controls the interrupting parts 212 and 222 will be described with reference to FIG. 11.

As shown in FIG. 11, the intermittent parts 212 and 222 are switched between a forced free state (hereinafter referred to as an OFF state) and a forced free release state (hereinafter referred to as an ON state) by an operating mechanism 240.

When the operating rod 241 of the operating mechanism 240 is in the upper position shown in FIG. The portion 241c3 pushes out the pin 283 of the first interrupting portion 212 in the outer diameter direction, thereby turning off the first interrupting portion 212 and the second interrupting portion 222.

Furthermore, when the operating rod 241 of the operating mechanism 240 is in the middle position shown in FIG. The third large diameter portion 241c3 pushes out the pin 283 of the first interrupting portion 212 in the outer diameter direction, thereby turning the second interrupting portion 222 on and the first interrupting portion 212 off.

Furthermore, when the operating rod 241 of the operating mechanism 240 is in the lower position shown in FIG. The small diameter portion 241b2 allows the pin 283 of the first interrupting portion 212 to return in the inner diameter direction, thereby turning the second interrupting portion 222 into an OFF state and turning the first interrupting portion 212 into an ON state.

Next, the operation of the two-way clutch 280 will be explained using the second disconnecting portion 222 as an example with reference to FIGS. 12 to 16. In the following example, a case will be described in which the transition from (A) to (B) to (C) in FIG. 11 at the second interrupting portion 222 is performed.

As shown in FIGS. 12A and 12B, when the second large diameter portion 241c2 of the operating rod 241 pushes out the pin 283 of the second interrupting portion 222 in the outer diameter direction, the convex portion 283a of the pin 283 The retainer 282 is fitted into the recess 284a of the guide 284, and the relative rotational position of the retainer 282 with respect to the second shaft 182 is fixed at a predetermined position. In this state, since the roller 281 is held at the circumferential center of the flat portion 182a, the roller 281 does not mesh with the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the second driven gear 186, It becomes an OFF state in which relative rotation with the second driven gear 186 is permitted.

(A) and (B) of FIG. 13 show that the operating rod 241 moves from a position where the second large diameter portion 241c2 pushes out the pin 283 of the second interrupting portion 222 in the outer diameter direction to a position where the first small diameter portion 241b1 pushes the pin 283 to the inner diameter of the pin 283. It shows a state where it has moved to a position that allows it to return in the direction. In FIG. 13, the pin 283 has already moved in the inner diameter direction, but in reality, at the timing when the second shaft 182 and the second driven gear 186 start to rotate relative to each other, the retainer 283 rotates together with the second driven gear 186. The guide 284 pushes the pin 283 back in the radial direction on the inclined surface of the recess 284a.

As shown in FIGS. 14A and 14B, in a state where the pin 283 is allowed to return in the radial direction, there is a gap between the second shaft 182 and the second driven gear 186, as indicated by the arrow in the figure. When relative rotation in the normal rotation direction occurs, the retainer 282 that rotates together with the second driven gear 186 moves the roller 281 in the normal rotation direction with respect to the second shaft 182. As a result, the roller 281 engages with the outer circumferential surface of the second shaft 182 and the inner circumferential surface of the second driven gear 186, and rotates in the forward rotation direction to integrally rotate the second shaft 182 and the second driven gear 186. Make the on state appear.

As shown in FIGS. 15A and 15B, in a state where the pin 283 is allowed to return in the radial direction, there is a gap between the second shaft 182 and the second driven gear 186, as indicated by the arrow in the figure. When relative rotation in the reverse direction occurs, the retainer 282 that rotates together with the second driven gear 186 moves the roller 281 in the reverse direction with respect to the second shaft 182. As a result, the roller 281 is engaged with the outer circumferential surface of the second shaft 182 and the inner circumferential surface of the second driven gear 186, and is in a reverse-on state in which the second shaft 182 and the second driven gear 186 are integrally rotated in the reverse direction. appear.

As shown in FIGS. 16A and 16B, the operating rod 241 is moved from the position where the first small diameter portion 241b1 allows the pin 283 of the second interrupting portion 222 to return in the inner radial direction to the first large diameter portion 241c1. moves to a position where the pin 283 is pushed out in the radial direction, the convex portion 283a of the pin 283 fits into the concave portion 284a of the guide 284, and the guide action of the pin 283 and the guide 284 causes the retainer 282 to move relative to the second shaft 182. The rotational position is fixed at a predetermined position. In this state, since the roller 281 is held at the circumferential center of the flat portion 182a, the roller 281 does not mesh with the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the second driven gear 186, It becomes an OFF state in which relative rotation with the second driven gear 186 is permitted.

With the electric prosthetic leg 1 configured in this way, it is possible to smoothly ascend stairs, whereas conventional passive prosthetic legs equipped with passive dampers had to go up one step at a time using the non-prosthetic leg.

Specifically, as shown from (A) to (B) in FIG. 17, when the electric prosthetic leg 1 is brought forward and ascends the stairs (climbing), the knee joint A large amount of power is required to extend the mechanism 130 from the bent state.

At this time, the transmission T is brought into a shifting state in which the operating rod 241 is positioned at the position shown in FIG. 11(C). In this speed change state, the motor M and spindle unit SP enter a power transmission state via the first speed change mechanism T1. In this state, when the motor M is rotated in the first direction, the power of the motor M is transmitted to the first shaft 181, the first drive gear 183, the first driven gear 184, the intermittent part 212 of the first intermittent mechanism 210, and the second The signal is transmitted to the shaft 182 and the spindle unit SP. As a result, the sleeve 174 is translated (extended) away from the transmission T, and the above-knee member 120 to which the sleeve 174 is connected is moved to the rotating portion 135 with respect to the below-knee member 110 to which the transmission T is attached. By rotating around , the knee joint mechanism 130 extends. Since the power for this extension is made into a high torque power when decelerated by the first transmission mechanism T1, a large load is applied to the electric prosthetic leg 1 when moving the electric prosthetic leg 1 forward and climbing stairs. Even in this case, it is possible to reliably extend the knee joint mechanism 130 from the bent state.

On the other hand, in order to smoothly ascend the stairs, the knee joint mechanism 130 is bent from the extended state while a load is applied to the healthy leg, as shown from (D) to (E) in FIG. It is necessary to (lift) up. When the knee joint mechanism 130 is bent from an extended state, a large amount of power is not required, but quick action is required.

At this time, the transmission T is brought into a shifting state in which the operating rod 241 is positioned at the position shown in FIG. 11(B). In this speed change state, the motor M and spindle unit SP enter a power transmission state via the second speed change mechanism T2. In this state, when the motor M is rotated in a second direction opposite to the first direction, the power of the motor M is transferred to the first shaft 181, the second drive gear 185, the second driven gear 186, and the second intermittent mechanism 220. is transmitted to the interrupting portion 222, the second shaft 182, and the spindle unit SP. As a result, the sleeve 174 is translated (reduced) so as to approach the transmission T, and the below-knee member 110 to which the transmission T is attached is moved to the rotating portion 135 with respect to the above-knee member 120 to which the sleeve 174 is connected. The knee joint mechanism 130 is bent by rotating around the center. Since this bending power is reduced in torque when the speed is increased by the second transmission mechanism T2, it is possible to quickly bend the knee joint mechanism 130.

In addition, when descending the stairs (descending) and walking on flat ground as shown in FIG. 18, when the electric prosthetic leg 1 is in a free leg state where no load is applied, the operating rod 241 is placed in the position shown in FIG. 11 (A). do. In this speed change state, the first intermittent section 212 and the second intermittent section 222 are turned off, so that the motor M and the spindle unit SP are in a free state in which they are not connected. In this state, arbitrary extension and flexion of the knee joint mechanism 130 is allowed depending on the walking situation, so that smooth swing walking with the prosthetic leg is possible.

On the other hand, when descending the stairs (descending) or walking on flat ground as shown in FIG. 18, when the electric prosthetic leg 1 is in a standing position, the operating rod 241 is placed in the position shown in FIG. 11 (B). . In this speed change state, the second intermittent portion 222 is turned on, so that the motor M and the spindle unit SP enter a power transmission state via the second speed change mechanism T2. In this state, the external force acting on the electric prosthetic leg 1 in the bending direction is transmitted from the spindle unit SP to the motor M via the second transmission mechanism T2, so the friction of the motor M is used to attenuate the external force in the bending direction. This allows for smooth prosthetic leg walking.

Next, a first modification and a second modification of the interrupting portions 212 and 222 will be described with reference to FIGS. 19 to 24. However, for configurations common to the embodiment, the same reference numerals as in the embodiment may be used, and the description of the embodiment may be referred to. Furthermore, in the following description, the small diameter portions 241b1 and 241b2 are collectively referred to as the small diameter portion 241b, and the large diameter portions 241c1 to 241c3 are collectively referred to as the large diameter portion 241c.

As shown in FIGS. 19 to 21, the intermittent parts 212 and 222 of the first modification are configured using a two-way clutch 280B that directly changes the position of the roller 281 with a pin 283 without using a guide 284 and a retainer 282. This embodiment differs from the previous embodiment in that The two-way clutch 280B includes a plurality of (for example, six) rollers 281 disposed between the outer peripheral surface of the second shaft 182 and the inner peripheral surface of the gears 184 and 186, and a plurality of rollers 281 that penetrate the second shaft 182 in the radial direction. A plurality of (e.g., three) pins 283 that are operated by the operating mechanism 240 to a forced free position and a forced free release position, and a plurality of (e.g., six) springs 285 that bias the roller 281. Be prepared.

Two rollers 281 are provided for one pin 283, that is, a pair of rollers 281 are provided. The pair of rollers 281 are provided to face each other with one pin 283 in between in the circumferential direction. The second shaft 182 includes recesses 182d on both sides of the pin 283 in the circumferential direction to accommodate the pair of rollers 281. The recessed portion 182d includes a flat portion 182e facing the inner peripheral surface portions of the gears 184 and 186, a rising portion 182f rising from one end of the flat portion 182e in the circumferential direction (the end on the side away from the pin 283), and The roller 281 has a roller holding portion 182g that is continuously provided at the other end of the flat portion 182e in the direction (the end that approaches the pin 283), and the roller 281 is connected to the inner peripheral surface of the gears 184 and 186. It is accommodated between the second shaft 182 and the flat portion 182e.

A radial distance C between the roller holding portion 182g and the inner peripheral surface portions of the gears 184 and 186 is smaller than the diameter B of the roller 281. Further, the radial distance D between the flat portion 182e and the inner peripheral surface portions of the gears 184 and 186 is larger than the diameter B of the roller 281.

In other words, when the pair of rollers 281 are held on the flat portion 182e, the pair of rollers 281 do not engage with the flat portion 182e of the second shaft 182 and the inner circumferential surfaces of the gears 184, 186 (disengaged state), Relative rotation between the two shafts 182 and the gears 184 and 186 is allowed (forced free state).

On the other hand, in the state where the pair of rollers 281 are held by the roller holding part 182g, the pair of rollers 281 mesh (engaged state) with the roller holding part 182g of the second shaft 182 and the inner circumferential surfaces of the gears 184, 186, The two shafts 182 and the gears 184 and 186 are connected to be rotatable together in two directions (forced free release state).

The spring 285 is, for example, a compression coil spring, and is disposed between the rising portion 182f of the second shaft 182 and the roller 281, and biases the roller 281 toward the roller holding portion 182g.

The pin 283 has a conical convex portion 283a at its radially outer end. As shown in FIGS. 19 and 20, when the radially inner end of the pin 283 is in contact with or close to the small diameter portion 241b of the operating rod 241 (forced free release state), the pin 283 is positioned radially inward. The pair of rollers 281 are allowed to move to the roller holding portion 182g. At this time, as shown in FIG. 19, when the gears 184 and 186 rotate normally, one roller 281 engages with the roller holding portion 182g of the second shaft 182 and the inner peripheral surface of the gears 184 and 186, so that the second shaft 182 and gears 184 and 186 are connected to be rotatable together in the normal rotation direction. Further, as shown in FIG. 20, when the gears 184 and 186 are reversed, the other roller 281 engages with the roller holding portion 182g of the second shaft 182 and the inner peripheral surface of the gears 184 and 186, so that the second shaft 182 and the gear 184 and 186 are connected to be rotatable together in the reverse direction. In addition, in FIGS. 19 to 21, hatched rollers 281 mean engaged rollers, black line arrows mean rotation of the second shaft 182 and/or gears 184, 186, and white arrows mean rotation of the second shaft 182 and/or gears 184, 186. This means the movement of the pin 283 and roller 281.

Further, as shown in FIG. 21, when the radially inner end of the pin 283 is in contact with the large diameter portion 241c of the operating rod 241, the pin 283 is pushed radially outward, and the pair of rollers 281 283 and is forcibly moved to the flat portion 182e against the biasing force of the spring 285 (forced free state). In this state, the pair of rollers 281 do not mesh with the flat portion 182e of the second shaft 182 and the inner circumferential surfaces of the gears 184 and 186, and relative rotation between the second shaft 182 and the gears 184 and 186 is allowed.

The transition from the forced free release state shown in FIGS. 19 and 20 to the forced free state shown in FIG. 21 means that the operating rod 241 moves from a position that allows the pin 283 to return in the inner radial direction to a position that pushes the pin 283 in the outer radial direction. This is achieved by doing. Furthermore, the transition from the forced free state in FIG. 21 to the forced free release state in FIGS. 19 and 20 is from a position where the operating rod 241 pushes the pin 283 in the outer radial direction to a position where the pin 283 is allowed to return in the inner radial direction. This is achieved by the pair of rollers 281 urged by the spring 285 pressing the protrusion 283a of the pin 283 from both sides in the circumferential direction.

According to the two-way clutch 280B of the first modified example as described above, the pin 283 directly operates the pair of rollers 281, thereby eliminating the time delay at the time of transition from the disengaged state to the engaged state. can. Further, since the pair of rollers 281 are arranged to face each other with the pin 283 in between in the circumferential direction, in the engaged state, the second shaft 181 is rotated in either direction in the circumferential direction. Power can be transmitted between the gears 184 and 186. Further, since the spring 285 that biases the roller 281 in the engagement direction is provided, the position of the roller 281 can be appropriately controlled.

As shown in FIGS. 22 to 24, the intermittent parts 212 and 222 of the second modified example do not include a roller 281, a retainer 282, a pin 283, and a guide 284, and include a swing shaft 286a extending from the second shaft 182, This embodiment differs from the previous embodiment in that it is configured using a two-way clutch 280C that includes a plurality of (for example, six) sprags 286 and 287 that are swingably supported around a fulcrum 287a.

The sprags 286 and 287 include a first sprag 286 and a second sprag 287. When viewed from the axial direction, the first sprag 286 and the second sprag 287 are swingably supported at their radial intermediate portions by the second shaft 182 via swing shafts 286a and 287a. The first sprag 286 and the second sprag 287 are arm members whose radially intermediate portions are bent or curved, and have inner end portions 286b and 287b that are inner end portions in the radial direction with respect to the swing shafts 286a and 287a, It has outer end portions 286d and 287d which are outer end portions. The first sprag 286 and the second sprag 287 are provided as a pair and arranged so as to be line symmetrical (inverted shape) in the circumferential direction.

The first sprag 286 and the second sprag 287 have convex portions 286c and 287c that protrude in the axial direction at inner ends 286b and 287b. An annular coil spring 288 is wound around the convex portions 286c and 287c of the first sprag 286 and the second sprag 287, and the inner ends 286b and 287b of the first sprag 286 and the second sprag 287 are attached to the operating rod 241. is biased in a direction approaching .

FIG. 22 shows a state in which the inner end portions 286b and 287b of the first sprag 286 and the second sprag 287 face the small diameter portion 241b of the operating rod 241 in the radial direction. In this state, the inner end portions 286b and 287b of the first sprag 286 and the second sprag 287 swing in the direction approaching the small diameter portion 241b of the operating rod 241, while the outer end portions 286d and 287d move toward the second shaft 182. through the opening 182h, swings in a direction approaching the inner circumferential surfaces of the gears 184, 186, and comes into contact with the inner circumferential surfaces of the gears 184, 186 (forced free release state).

In this state, when the gears 184, 186 and the second shaft 182 rotate relative to each other in one direction, the first sprag 286 becomes an escape direction, allowing the relative rotation (disengaged state), and rotates in the other direction. When relative rotation occurs, the relative rotation is prevented in the meshing direction (engaged state). On the other hand, when the gears 184, 186 and the second shaft 182 rotate relative to each other in one direction, the second sprag 287 becomes in the meshing direction and prevents the relative rotation (engaged state), and when the gears 184, 186 and the second shaft 182 rotate relative to each other in the other direction, the second sprag 287 prevents the relative rotation. It becomes a relief direction and allows relative rotation (disengaged state). Thereby, the gears 184, 186 and the second shaft 182 are connected to be rotatable together in one direction and the other direction.

On the other hand, as shown in FIG. 23, when the inner end portions 286b and 287b of the first sprag 286 and the second sprag 287 face the large diameter portion 241c of the operating rod 241 in the radial direction, While the inner ends 286b and 287b of the second sprag 287 are pushed by the large diameter part 241c of the operating rod 241 and swing radially outward, the outer ends 286d and 287d of the first sprag 286 and the second sprag 287 are , swings in a direction away from the inner circumferential surfaces of the gears 184 and 186 (forced free state). This allows relative rotation between the gears 184, 186 and the second shaft 182 in one direction and the other direction.

The transition from the forced free release state in FIG. 22 to the forced free state in FIG. This is achieved by swinging it into position. Furthermore, the transition from the forced free state in FIG. 23 to the forced free release state in FIG. The coil spring 288 allows the inner end portions 286b and 287b of the first sprag 286 and the second sprag 287 to swing from the radially outer position to the radially inner position. Realize.

According to the two-way clutch 280C of the second modified example as described above, since the disengaged state and the engaged state are switched by the swinging of the sprags 286 and 287, the transition from the disengaged state to the engaged state can eliminate time delays. Furthermore, in the engaged state, a radial gap is secured between the inner ends 286b, 287b of the sprags 286, 287 and the small diameter portion 241b of the operating rod 241, so that variations in the lengths of the sprags 286, 287 are prevented. It can be absorbed.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that those skilled in the art can come up with various changes or modifications within the scope of the claims, and these naturally fall within the technical scope of the present invention. Understood. Further, each of the constituent elements in the above embodiments may be arbitrarily combined without departing from the spirit of the invention.

For example, in the above embodiment, a prosthetic leg device (electric prosthetic leg) applied to a knee joint is exemplified as an embodiment of a joint device in which the intermittent device of the present invention is used, but the present invention is not limited to this. The device may be a device (an electric prosthetic limb), the person wearing the device may be an animal other than a human, or it may be a robot. When applied to the elbow joint, the below-knee member 110 of the above embodiment becomes the distal end side of the above-knee member 120, that is, the forearm.

Further, the disconnection device of the present invention may be used not only in a joint device but also in a vehicle drive device. FIG. 25 is a schematic diagram of a vehicle drive device equipped with the disconnection device of the above-described embodiment.

A vehicle drive device 900 in FIG. 25 includes a motor M as a drive source, a transmission T' that transmits the power of the motor M, a first disconnection mechanism 210 and a second disconnection mechanism 220 provided in the transmission T'. It includes a differential device DIF that distributes the output from the transmission T' to the left and right drive wheels WH.

The transmission T' includes a first transmission mechanism T1 that transmits the power of the motor M to the left and right drive wheels WH at a first transmission ratio, and a first transmission mechanism T1 that transmits the power of the motor M to the left and right drive wheels WH at a first transmission ratio. A second transmission mechanism T2 that transmits transmission to the drive wheels WH is provided. The relationship between the first gear ratio and the second gear ratio is the same as in the embodiment described above.

The first transmission mechanism T1 includes a first drive gear 901 and a first driven gear 902 that mesh with each other. The first driving gear 901 is supported by a first shaft 911 so as to be relatively rotatable, and the first driven gear 902 is supported by a second shaft 912 so as to be able to rotate integrally therewith. The second transmission mechanism T2 includes a second drive gear 905 and a second driven gear 906 that mesh with each other. The second driving gear 905 is supported by the first shaft 911 so as to be relatively rotatable, and the second driven gear 906 is supported by the second shaft 912 so as to be able to rotate integrally therewith. In addition to the first drive gear 901 and the second drive gear 905, an input gear 907 to which the power of the motor M is input is attached to the first shaft 911 so as to be integrally rotatable therewith. Further, in addition to the first driven gear 902 and the second driven gear 906, an output gear 908 capable of outputting the power of the motor M to the differential device DIF is attached to the second shaft 912 so as to be integrally rotatable therewith.

The first disconnection mechanism 210 includes a first disconnection section 212 provided between the first drive gear 901 and the first shaft 911, and an operation mechanism 240 that switches the first disconnection section 212. The second disconnection mechanism 220 includes a second disconnection section 222 provided between the second drive gear 905 and the first shaft 911, and an operation mechanism 240 that switches the second disconnection section 222. These intermittent parts 212 and 222 have a common configuration and can be switched between a cutoff state in which power transmission is cut off and a power transmission enabled state in which rotational power in both one direction and the other direction can be transmitted. It is composed of Note that the roller 281, operating rod 241, pin 283, retainer 282, and guide 284 that constitute the interrupting parts 212 and 222 are the same as those in the above-described embodiment, and therefore are given the same reference numerals and a description thereof will be omitted.

In the vehicle drive device 900 configured as described above, when the first intermittent section 212 is off and the second intermittent section 222 is on, the power of the motor M is transferred to the left and right through the second transmission mechanism T2. The signal is transmitted to the drive wheel WH. Furthermore, with the first intermittent section 212 on and the second intermittent section 222 off, the power of the motor M is transmitted to the left and right drive wheels WH via the first transmission mechanism T1. Further, when the first intermittent section 212 is off and the second intermittent section 222 is off, the power of the motor M is not transmitted to the left and right drive wheels WH, which is a so-called neutral state.

By applying the disconnection device of the present invention to the vehicle drive device 900, rotational matching during gear shifting becomes unnecessary, and responsiveness during gear shifting improves. Furthermore, the number of parts constituting the disconnection device can be reduced compared to a general dog clutch or the like. Note that the first disconnection mechanism 210 and/or the second disconnection mechanism 220 may be provided on the second shaft 912 instead of the first shaft 911. In addition to the circular wheel as in this embodiment, the driving wheel WH may be a starting wheel that moves an endless track. Further, in this embodiment, an intermittent device is applied to a drive device that drives a drive wheel WH as a propulsion unit that propels a vehicle, but it is also applicable to a propeller that propels other moving objects such as a ship or an aircraft. An intermittent device may be applied to the drive device that drives the propulsion section. Furthermore, in addition to the propulsion section of a moving body, the intermittent device may be applied to a drive device that drives a working section such as a snow removal section or a grass cutting section of a working machine such as a snow blower or a grass cutter.

This specification describes at least the following matters. Note that, although components corresponding to those in the above-described embodiment are shown in parentheses, the present invention is not limited thereto.

(1) The engagers (roller 281, first sprag 286, first sprag 286, 2 sprag 287) and
The engager is placed in an engaged state in which the first rotating body and the second rotating body can rotate together, and in a non-engaged state in which the first rotating body and the second rotating body can rotate relative to each other. A disconnecting device (a first disconnecting mechanism 210, a second disconnecting mechanism 220) comprising an operating section (operating rod 241, pin 283, retainer 282, guide 284) that is operated.

According to (1), the engaging state of the engaging element can be appropriately switched between the engaged state and the disengaged state by the operating section.

(2) The disconnection device according to (1),
The engager includes a pair of a first engager (roller 281) and a second engager (roller 281),
The operation section is
A disconnection device including an operator (operating rod 241, pin 283) provided to be able to directly operate the first engager and the second engager.

According to (2), the time delay at the time of transition from the non-engaged state to the engaged state can be eliminated by the operator directly operating the first engager and the second engager.

(3) The disconnection device according to (2),
The first rotating body and the second rotating body are
so that their rotational axes coincide, and
arranged so that at least a portion of them overlap when viewed in an orthogonal direction perpendicular to the rotation axis,
The operator is
a reciprocating element (pin 283) provided so as to be movable in an orthogonal direction orthogonal to the rotational axis;
an extension part (operating rod 241) that extends along the rotational axis and is provided so as to be movable forward and backward along the rotational axis;
The advancing/retracting element is a disconnecting device, wherein an inner end of the advancing/retracting element, which is an end of the advancing/retracting element on the rotation axis side in the orthogonal direction, comes into contact with the extending part.

According to (3), in the operation element, the inner end of the advance/retreat element comes into contact with the extension part, so that the advance/retractor advances or retreats along the orthogonal direction orthogonal to the rotation axes of the first rotating body and the second rotating body. It becomes possible to move.

(4) The disconnection device according to (3),
The first engager and the second engager are configured such that in the circumferential direction,
Intermittent devices are provided to face each other with the reciprocating element in between.

According to (4), in the engaged state, power can be transmitted between the first rotating body and the second rotating body regardless of the direction of rotation in the circumferential direction.

(5) The disconnection device according to (4),
a first biasing portion (spring 285) that biases the first engager disposed on one side of the reciprocating element in the circumferential direction toward the other side;
The disconnection device further includes a second biasing portion (spring 285) that biases the second engager disposed on the other side toward the one side.

According to (5), the positions of the first engaging element and the second engaging element can be appropriately controlled by the first urging part and the second urging part.

(6) The disconnection device according to (1),
The engager is swingably supported with respect to the second rotating body about a swing shaft (swing shafts 286a, 287a) as a fulcrum,
An interrupting device provided such that an end portion of the engager comes into contact with the first rotating body when in the engaged state.

According to (6), since the non-engaged state and the engaged state are switched by the swinging of the engaging element, it is possible to eliminate the time delay at the time of transition from the non-engaged state to the engaged state.

(7) The disconnection device according to (6),
The first rotating body and the second rotating body are arranged such that their rotational axes coincide with each other,
The engaging element has a pair of first engaging element (first sprag 286) and second engaging element (second sprag 287),
When the end portion of the first engager contacts the first rotating body in the engaged state,
provided to allow relative rotation of the first rotating body and the second rotating body in one direction in a circumferential direction with respect to the rotational axis, and to prevent relative rotation in the other direction;
When the end portion of the second engager contacts the first rotating body in the engaged state,
An intermittent device provided to allow relative rotation of the first rotating body and the second rotating body in the other direction and to prevent relative rotation in the one direction.

According to (7), in the engaged state, power can be transmitted between the first rotating body and the second rotating body regardless of the direction of rotation in the circumferential direction.

(8) The disconnection device according to (7),
The first engager allows relative rotation of the first rotating body and the second rotating body in the one direction and the other side in the disengaged state,
The second engagement element is an intermittent device that allows relative rotation of the first rotating body and the second rotating body in the one direction and the other side in the disengaged state.

According to (8), in the disengaged state, power transmission is impossible between the first rotating body and the second rotating body regardless of the direction of rotation in the circumferential direction.

182 Second shaft (second rotating body)
184 First driven gear (first rotating body)
186 Second driven gear (first rotating body)
210 First intermittent mechanism (intermittent device)
220 Second intermittent mechanism (intermittent device)
240 Operation mechanism (operation unit)
241 Operation rod (operation part, operator, extension part)
281 Roller (engaging element, first engaging element, second engaging element)
282 Retainer (operation part)
283 pin (operation unit, operator, forward/retractor)
284 Guide (operation unit)
285 Spring 286 First sprag (engaging element, first engaging element)
286a Swing shaft 287 Second sprag (engaging element, second engaging element)
287a Swing axis

Claims (8)

an engager disposed between the first rotating body and the second rotating body;
The engager is placed in an engaged state in which the first rotating body and the second rotating body can rotate together, and in a non-engaged state in which the first rotating body and the second rotating body can rotate relative to each other. An intermittent device, comprising: an operation section that is operated to The disconnection device according to claim 1,
The engager has a pair of first engager and second engager,
The operation section is
An intermittent device comprising an operator provided to be able to directly operate the first engager and the second engager. The disconnection device according to claim 2,
The first rotating body and the second rotating body are
so that their rotational axes coincide, and
arranged so that at least a portion of them overlap when viewed in an orthogonal direction perpendicular to the rotation axis,
The operator is
a reciprocating element that is provided so as to be movable forward and backward along an orthogonal direction perpendicular to the rotational axis;
an extension part that extends along the rotational axis and is provided so as to be movable forward and backward along the rotational axis;
The advancing/retracting element is a disconnecting device, wherein an inner end of the advancing/retracting element, which is an end of the advancing/retracting element on the rotation axis side in the orthogonal direction, comes into contact with the extending part. The disconnection device according to claim 3,
The first engager and the second engager are configured such that in the circumferential direction,
Intermittent devices are provided to face each other with the reciprocating element in between. The disconnection device according to claim 4,
a first urging portion that urges the first engager disposed on one side of the reciprocating member in the circumferential direction toward the other side;
The disconnection device further includes: a second biasing portion that biases the second engager disposed on the other side toward the one side. The disconnection device according to claim 1,
The engager is swingably supported with respect to the second rotary body about a swing shaft as a fulcrum,
An interrupting device provided such that an end portion of the engager comes into contact with the first rotating body when in the engaged state. The disconnection device according to claim 6,
The first rotating body and the second rotating body are arranged such that their rotational axes coincide with each other,
The engager has a pair of first engager and second engager,
When the end portion of the first engager contacts the first rotating body in the engaged state,
provided to allow relative rotation of the first rotating body and the second rotating body in one direction in a circumferential direction with respect to the rotational axis, and to prevent relative rotation in the other direction;
When the end portion of the second engager contacts the first rotating body in the engaged state,
An intermittent device provided to allow relative rotation of the first rotating body and the second rotating body in the other direction and to prevent relative rotation in the one direction. The disconnection device according to claim 7,
The first engager allows relative rotation of the first rotating body and the second rotating body in the one direction and the other side in the disengaged state,
The second engagement element is an intermittent device that allows relative rotation of the first rotating body and the second rotating body in the one direction and the other side in the disengaged state.

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