WO2015166525A1 - トルク伝達機構 - Google Patents
トルク伝達機構 Download PDFInfo
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- WO2015166525A1 WO2015166525A1 PCT/JP2014/061825 JP2014061825W WO2015166525A1 WO 2015166525 A1 WO2015166525 A1 WO 2015166525A1 JP 2014061825 W JP2014061825 W JP 2014061825W WO 2015166525 A1 WO2015166525 A1 WO 2015166525A1
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- connection
- torque
- unit
- transmission mechanism
- switching unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
- F16D7/06—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with intermediate balls or rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/202—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
- F16D43/204—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with intermediate balls or rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
Definitions
- the present invention relates to a torque transmission mechanism, and more particularly, to a torque transmission mechanism having a torque limiting function for preventing input torque of a predetermined value or more from being transmitted to the output shaft side.
- the torque transmission mechanism disclosed in the above-mentioned US Pat. No. 6,231,010 includes an input shaft, an output shaft, and an intermediate gear portion that connects the input shaft and the output shaft.
- the intermediate gear portion is provided with an input side gear and an output shaft gear at both ends of a shaft member provided with a notch in the outer peripheral portion.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a torque transmission mechanism that can be reset after the torque limiting function is activated.
- a torque transmission mechanism includes an input shaft, an output shaft, and an intermediate portion having a connection portion.
- the intermediate portion receives input torque input to the input shaft.
- the connection state that is connected to the connection part to restrict the rotation of the intermediate part, and the release state that releases the connection to the connection part and allows the rotation of the intermediate part
- a limiting mechanism configured to be switched to a released state when a torque exceeding a predetermined level is applied in the connected state.
- a connection state is provided in the intermediate portion of the transmission mechanism portion, and connected to the connection portion to restrict rotation of the intermediate portion, and the connection portion Can be switched between a release state in which the connection to the release is permitted and the rotation of the intermediate portion is allowed, and a restriction configured to be switched to the release state when a torque exceeding a predetermined level is applied in the connection state.
- a mechanism is provided.
- a restriction mechanism part can be switched to a release state, and connection with a connection part can be canceled.
- the intermediate portion rotates idly without transmitting torque to the output shaft side, it is possible to prevent input torque exceeding a predetermined value from being transmitted to the output shaft side.
- the restriction mechanism part switched to the release state is switched to the original connection state, the torque of the input shaft can be transmitted to the output shaft again.
- the limiting mechanism portion is movable to a connection position that engages with the connection portion in the connected state and a release position where the engagement with the connection portion is released in the released state.
- a torque limiting unit that supports the switching unit and allows the switching unit to move toward the release position when a torque greater than or equal to a predetermined value acts on the switching unit at the connection position. If comprised in this way, a switching part can be moved from a connection position to a cancellation
- the limiting mechanism unit further includes a return input unit that moves the switching unit to the connection position. If comprised in this way, after a switching part moves to a cancellation
- the restriction mechanism portion further includes a housing that accommodates the restriction mechanism portion, and the return input portion is fixed to the switching portion at one end side and exposed to the outside of the housing at the other end side.
- the switching portion is moved to the connection position by an operation from the outside of the housing. If comprised in this way, reset operation can be performed from the exterior of a housing. Accordingly, for example, a work of disassembling a part of the housing (such as a lid) to expose the switching unit and moving the switching unit is not necessary, and the resetting operation can be facilitated.
- connection section is a connection gear provided in an intermediate section
- the switching section partially includes a gear portion that meshes with the connection gear.
- This is a sector gear. If comprised in this way, the position where the gear part of a switching part and the connection gear of an intermediate part mesh
- the transmission mechanism section is preferably a planetary gear mechanism including an input shaft having a sun gear, an output shaft having a planetary gear, and an intermediate portion having an internal ring gear.
- the connecting portion is provided on the outer peripheral portion of the intermediate portion. If comprised in this way, a restriction
- connection part regardless of the internal structure of the planetary gear mechanism that transmits torque, it is only necessary to provide a connection portion on the outer peripheral portion of the planetary gear mechanism (intermediate portion). Can be maintained.
- the torque limiting unit is preferably a retracted position that separates the switching unit from the connecting unit when the switching unit reaches a release position in contact with the connecting unit. It is configured to be moved. If comprised in this way, when a switching part moves to a cancellation
- the torque limiting portion preferably includes a pair of cam portions having a ball ramp portion, a ball disposed between the pair of cam portions, and a biasing member that biases the pair of cam portions toward each other.
- the pair of cam portions is configured such that one of the cam portions is connected to the switching portion and is relatively movable with respect to the other, and the urging force of the urging member is working.
- an inclined path inclined so as to guide the ball from the first part corresponding to the release position toward the second part corresponding to the retracted position.
- the predetermined value (limit value) of the torque depends on the processing accuracy of the shaft member, the material hardness of the shaft member, and the like. For this reason, the predetermined value of torque fluctuates due to variations in processing errors and material hardness.
- the ball ramp mechanism can be employed in the torque limiting unit, it is possible to suppress variation in the predetermined value of the torque that moves the switching unit. As a result, an accurate torque limiting operation is possible.
- (A) is a typical development view of the ball accommodating portion of the torque limiting portion at the connection position.
- (B) is the schematic diagram which looked at the switching part and connection part in a connection position from the axial direction.
- (A) is a typical development view of the ball accommodating portion of the torque limiting portion at the release position.
- (B) is the schematic diagram which looked at the switching part and connection part in the cancellation
- A) is a typical development view of the ball accommodating portion of the torque limiting portion in the retracted position.
- (B) is the schematic diagram which looked at the switching part and connection part in the retracted position from the axial direction.
- the torque transmission mechanism 1 transmits input torque input to the input shaft 21 to the output shaft 22, while transmitting input torque greater than a predetermined value to the output shaft 22 side.
- Torque limiting function to prevent The torque transmission mechanism 1 includes a transmission mechanism unit 2 that transmits torque from the input shaft 21 to the output shaft 22, and a limiting mechanism unit 3 that prevents transmission of input torque of a predetermined value or more to the output shaft 22 side. Yes.
- the transmission mechanism 2 and the limiting mechanism 3 are accommodated in a common (single) housing 4.
- the input shaft 21 is connected to an actuator side such as a motor that generates input torque (drive torque).
- the output shaft 22 is connected to a drive portion that is a transmission destination of the drive torque of the actuator.
- the torque transmission mechanism 1 is configured to actuate the limiting mechanism portion 3 with a predetermined or higher torque input as a trigger. As a result, the torque transmission mechanism 1 is configured to prevent an excessive torque from acting on the power transmission system from the actuator to the drive portion.
- the transmission mechanism unit 2 includes an input shaft 21, an output shaft 22, and an intermediate unit 23 having a connection unit 23b.
- the transmission mechanism unit 2 is configured to transmit the input torque input to the input shaft 21 to the output shaft 22 via the intermediate unit 23.
- the transmission mechanism unit 2 is a planetary gear mechanism including a sun gear 21a, a planetary gear 22a, and a ring gear (internal gear) 23a.
- the A direction in which the rotation center axis O1 of the input shaft 21 and the output shaft 22 extends is referred to as an axial direction.
- a radial direction perpendicular to the axial direction A and centering on the central axis O1 is shown as a B direction.
- the input shaft 21 has a sun gear 21a at one end on the output shaft 22 side (A1 side).
- the input shaft 21 is rotatably supported by the housing 4 around the central axis O1.
- the output shaft 22 is a rotating shaft (driven shaft) that rotates according to the input shaft 21.
- the output shaft 22 has a planetary gear 22a and a carrier portion 22b.
- the planetary gear 22 a is provided so as to mesh with the sun gear 21 a of the input shaft 21 and mesh with the ring gear 23 a of the intermediate portion 23.
- a plurality of (for example, three) planetary gears 22a are provided at equal angular intervals around the central axis O1.
- the carrier portion 22b supports a plurality of planetary gears 22a so as to be rotatable around the shaft portion 22c.
- the carrier portion 22b is rotatably supported by the housing 4 at the shaft portion on the A1 direction side.
- the intermediate part 23 is an annular member arranged outside the input shaft 21 and the output shaft 22 in the radial direction B.
- the intermediate portion 23 has a ring gear (internal gear) 23a on the inner peripheral portion.
- the intermediate part 23 has the connection part 23b in an outer peripheral part.
- the connection part 23b is configured to be freely connected to and disconnected from the restriction mechanism part 3.
- the intermediate portion 23 is supported by the housing 4 so as to be rotatable around the central axis O1. Accordingly, the rotation of the intermediate portion 23 is restricted by the restriction mechanism portion 3 (becomes impossible to rotate) in a state where it is connected to the restriction mechanism portion 3 (connected state). On the other hand, the intermediate portion 23 can rotate around the central axis O1 in a state where the connection with the limiting mechanism portion 3 is released (released state).
- connection portion 23b is a connection gear provided on the outer peripheral surface of the intermediate portion 23 as shown in FIG.
- the connection portion 23 b is a connection external gear formed in a circumferential shape over the entire circumference of the outer peripheral surface of the intermediate portion 23.
- the gear portion of the connecting portion 23b is a spur gear (spur gear).
- the connecting portion 23b is configured to mesh with a switching portion (sector gear) 31 described later of the limiting mechanism portion 3.
- the intermediate portion 23 is formed with an internal gear (ring gear 23a) that meshes with the planetary gear 22a on the inner peripheral surface, and an external gear (connecting portion 23b) that meshes with the switching portion 31 on the outer peripheral surface.
- the ring gear 23 a and the connecting portion 23 b are arranged at the same position in the axial direction A.
- the limiting mechanism unit 3 is arranged outside the transmission mechanism unit 2 (a position outside the radial direction B).
- the limiting mechanism unit 3 can be switched between a connection state in which the rotation of the intermediate portion 23 is restricted by being connected to the connection portion 23b and a release state in which the connection of the connection portion 23b is released and the rotation of the intermediate portion 23 is allowed. It is configured.
- the limitation mechanism part 3 is comprised so that it may be switched to a cancellation
- the limiting mechanism unit 3 includes a switching unit 31, a return input unit 32, and a torque limiting unit 33.
- the switching unit 31 is provided at one end (A1 side end) of the return input unit 32.
- the switching unit 31 has a connection position P1 (see FIG. 2B) that engages with the connection part 23b in the connected state, and a release position P2 that releases the engagement with the connection part 23b in the released state (see FIG. 3B). )) And a retracted position P3 (see FIG. 3B).
- the switching unit 31 is a sector gear having a gear portion 31a that meshes with the connection portion (connection gear) 23b as a part of the outer peripheral portion. Therefore, as shown in FIG. 2B, in the switching portion 31, the gear portion 31a and the connecting portion 23b are engaged and engaged at the connection position P1.
- connection position P1 a part of the input torque (reaction force during torque transmission) acts on the switching portion 31 from the intermediate portion 23 side due to the meshing of the gears.
- the switching part 31 receives the torque from the connection part 23b side at the connection position P1, and supports the rotation of the intermediate part 23 around the central axis O1.
- the release position P2 is a position where the switching unit 31 is in contact with the connection unit 23b (a position immediately after the engagement is lost).
- the retracted position P3 is a position where the switching unit 31 is further rotated from the release position P2 until it is separated from the connection unit 23b. Therefore, the contact between the switching unit 31 and the connection unit 23b is prevented at the retracted position P3.
- the return input unit 32 is a shaft member (input shaft) extending in the A direction.
- One end side (A1 side end) of the return input unit 32 is fixed to the switching unit 31.
- the return input portion 32 is rotatably supported by the housing 4 via a radial bearing 4a. Therefore, the switching unit 31 and the return input unit 32 are integrally rotated about the central axis O2.
- the switching input unit 32 and the switching unit 31 are integrally formed with the return input unit 32, but the return input unit 32 and the switching unit 31 may be separated.
- the return input portion 32 is provided so that the other end side (A2 side end portion) is exposed to the outside of the housing 4. Further, the return input unit 32 is configured to move the switching unit 31 to the connection position P1 by an operation from the outside of the housing 4. Specifically, an engagement portion 32 a such as a hexagonal hole is formed at the other end (A2 side end portion) of the return input portion 32.
- the return input unit 32 moves (returns) the switching unit 31 from the release position P2 (retracted position P3) to the connection position P1 by rotating the return input unit 32 by engaging a tool or the like with the engaging unit 32a. It is possible to make it.
- the torque limiting unit 33 is configured to support the switching unit 31 and to allow the switching unit 31 to move toward the release position P2 when a predetermined torque or more is applied to the switching unit 31 at the connection position P1. Has been. Further, the torque limiting unit 33 is configured to move the switching unit 31 to the retreat position P3 that is separated from the connection unit 23b when the switching unit 31 reaches the release position P2 in contact with the connection unit 23b.
- the torque limiting portion 33 is a ball ramp mechanism including a pair of cam portions 33a and 33b, a ball 33c, and a coil spring 33d.
- the torque limiting portion 33 is formed in an annular shape (cylindrical shape), and the return input portion 32 is inserted inside.
- the coil spring 33d is an example of the “biasing member” in the present invention.
- the cam portion 33a on the A1 side is engaged with the spline portion 32b of the return input portion 32.
- the A2 side cam portion 33 b is engaged with the spline portion 4 b of the housing 4.
- one cam portion 33a is connected to the switching portion 31 via the return input portion 32, and is configured to be relatively movable (rotated) around the central axis O2 with respect to the other cam portion 33b.
- the cam portion 33b on the A2 side is fixed by the housing 4 in the rotational direction around the central axis O2.
- the pair of cam portions 33a and 33b are both configured to be movable in the axial direction A by the spline engagement.
- the pair of cam portions 33a and 33b are biased in a direction approaching each other by a coil spring 33d.
- the coil spring 33d biases the cam portion 33b toward the cam portion 33a (A1 side) with the ball 33c interposed therebetween.
- the end portion on the A2 side of the coil spring 33d is supported by a locking member 32c fixed to the return input portion 32 via an annular spring seat 34, a thrust bearing 35, and a bearing base 36.
- the A1 direction side of the coil spring 33d is supported by the flange portion 32d of the return input portion 32 via the cam portion 33b, the ball 33c, the cam portion 33a, and the radial bearing 4a.
- the ball 33c is disposed between the pair of cam portions 33a and 33b. Specifically, as shown in FIG. 5, a ball housing portion 40 is formed on the end surface on the A2 side of the cam portion 33a. A plurality (three) of the ball accommodating portions 40 are provided at equal angular intervals in the rotation direction. Therefore, the ball accommodating portion 40 is a concave portion having an arc shape that is approximately one third of the circumference. In addition, although not shown in figure, the A1 side end surface of the cam part 33b is also the same. Balls 33c are arranged in these ball accommodating portions 40, respectively. The ball 33c moves in the ball housing portion 40 as the cam portion 33a rotates. In FIG. 5, the end surface portion of the cam portion 33 a other than the ball housing portion 40 is hatched for the sake of convenience in order to distinguish from the ball housing portion 40.
- the ball housing portion 40 includes a ball ramp portion 41 and a pair of ball pockets 42.
- the ball accommodating portion 40 is formed with a flat path 44 that connects the ball ramp portion 41 and the boundary portion 43, and an inclined path 45 that connects the boundary portion 43 and the ball pocket 42.
- the ball lamp portion 41 is a portion corresponding to the connection position P ⁇ b> 1 of the switching portion 31.
- the boundary portion 43 is a portion corresponding to the release position P2 of the switching unit 31.
- the ball pocket 42 is a portion corresponding to the retracted position P3 of the switching unit 31.
- a pair of the ball pocket 42, the flat road 44, and the inclined path 45 are provided on both sides of the ball ramp portion 41, respectively.
- the boundary portion 43 is an example of the “first portion” in the present invention.
- the ball pocket 42 is an example of the “second portion” in the present invention.
- the ball ramp portion 41 is a concave slope portion into which the ball 33c is fitted.
- the ball 33c is in a stable state when it fits in the ball ramp portion 41.
- the rotational angle positions of the cam portions 33a and 33b are determined so that the position of the ball ramp portion 41 corresponds to the connection position P1 of the switching portion 31.
- the torque required for the ball 33c to move over the ball ramp portion 41 and move in the rotational direction around the central axis O2 that is, the torque required to rotate the cam portion 33a
- This corresponds to a predetermined torque (torque limit value) for moving the mechanism unit 3 (switching unit 31) to the release position P2.
- the torque T acting on the ball 33c via the cam portion 33a and the axial force (force in the axial direction A) W that the ball 33c presses the cam portion 33b by the torque T are: It is represented by the following formula (1).
- W T / (R ⁇ tan ⁇ ) (1)
- R is the distance (radius) from the central axis O2 to the center of the ball 33c (see FIG. 1).
- ⁇ is the inclination angle of the ball ramp portion 41.
- the flat path 44 is a flat surface parallel to a surface (an end surface in the axial direction of the cam portion) orthogonal to the central axis O2. Further, as shown in FIGS. 2A and 3A, the length L1 of the flat path 44 is determined by the rotation angle ⁇ between the connection position P1 and the release position P2 of the switching unit 31 (FIG. 3 ( B)). That is, when the ball 33c reaches the boundary portion 43 that is the end point of the flat road 44, the switching unit 31 reaches the release position P2. Since the gear portion 31a of the switching portion 31 and the connecting portion 23b of the intermediate portion 23 are kept engaged with each other between the flat paths 44, the switching portion 31 is subjected to torque acting on the switching portion 31 from the intermediate portion 23. And the cam part 33a is rotated.
- the inclined path 45 guides the ball 33c from the boundary portion 43 corresponding to the release position P2 of the switching unit 31 toward the ball pocket 42 corresponding to the retracted position P3 in a state where the biasing force of the coil spring 33d is working. It is inclined. That is, the inclined path 45 is inclined from the boundary portion 43 toward the ball pocket 42 so that the distance between the pair of cam portions 33a and 33b increases. Also, as shown in FIGS. 3A and 4A, the length L2 of the ramp 45 is determined by the rotation angle ⁇ between the release position P2 and the retracted position P3 of the switching unit 31 (FIG. 4 ( B)).
- the switching unit 31 is meshed with the connection unit 23b at the connection position P1.
- the sun gear 21a rotates the planetary gear 22a.
- the planetary gear 22a rotates (revolves) around the central axis O1 along the inner peripheral surface of the intermediate portion 23 by rotating while meshing with the ring gear 23a.
- the rotation around the central axis O1 becomes the rotation of the carrier portion 22b, and rotates the output shaft 22 at a predetermined reduction ratio.
- torque acting on the intermediate portion 23 (reaction force when rotating the planetary gear 22a) is received by the torque limiting portion 33 via the switching portion 31 meshing with the connecting portion 23b.
- the ball 33c spontaneously moves to the ball pocket 42 along the inclined path 45 by the urging force of the coil spring 33d.
- the switching portion 31 spontaneously rotates from the release position P2 to the retracted position P3 as shown in FIGS. 4 (A) and 4 (B). To do. Thereby, contact with the gear part 31a of the switch part 31 which moved to the retracted position P3 and the connection part 23b of the rotating intermediate part 23 is prevented.
- the operator When returning to the original connection state after the operation of the restriction mechanism portion 3 (after switching to the release state), the operator can connect a tool or the like to the engagement portion 32a outside the housing 4 as shown in FIG. Is engaged to rotate the return input unit 32. As a result, the switching unit 31 is rotated from the retracted position P3 to the connection position P1. At this time, since the gear portion 31a of the switching portion 31 meshes with any portion of the circumferential connection portion 23b, rotational alignment between the switching portion 31 and the intermediate portion 23 (connection portion 23b) is unnecessary. is there.
- the torque transmission mechanism 1 configured as described above can be applied to, for example, a control surface control device (control surface drive device) of the aircraft 100, as shown in FIG.
- a control surface control device control surface drive device
- the limiting mechanism unit 3 When the limiting mechanism unit 3 is in the connected state (the switching unit 31 is in the connection position P1), the input torque of the motor 102 on the input shaft 21 side is transmitted to the output shaft 22 side via the transmission mechanism unit 2.
- the rotation of the output shaft 22 is converted into a linear motion for rotating the control surface (flap) 101 by a linear motion mechanism 103 such as a ball screw mechanism.
- a linear motion mechanism 103 such as a ball screw mechanism
- the connecting portion 23b is provided in the intermediate portion 23 of the transmission mechanism portion 2.
- a limiting mechanism 3 configured to be switched to a released state when a predetermined torque or more is applied in the connected state is provided. Thereby, the torque of the input shaft 21 can be transmitted to the output shaft 22 by receiving the reaction force of the torque transmitted from the intermediate portion 23 to the output shaft 22 in the normal state by the limiting mechanism portion 3 in the connected state. .
- the restriction mechanism part 3 can be switched to a release state, and the connection with the connection part 23b can be released.
- the intermediate portion 23 rotates idly without transmitting torque to the output shaft 22 side, so that it is possible to prevent input torque exceeding a predetermined value from being transmitted to the output shaft 22 side.
- the restriction mechanism part 3 switched to the release state is switched to the original connection state, the torque of the input shaft 21 can be transmitted to the output shaft 22 again.
- the torque transmission mechanism 1 of the present embodiment there is no need to perform component replacement work for resetting the torque limiting function, and the torque limiting function can be quickly recovered. Therefore, when the torque transmission mechanism 1 is used in the control surface control device of the aircraft 100 as shown in FIG. 7, the torque limiting function can be quickly restored even within a limited time during the maintenance time of the aircraft 100. Is possible.
- connection position P1 that engages with the connection portion 23b in the connected state
- release position P2 that disengages the connection portion 23b in the released state.
- the part 31 is provided in the restriction mechanism part 3. Further, the torque limiting unit 33 that supports the switching unit 31 and allows the switching unit 31 to move toward the release position P2 when a torque greater than or equal to a predetermined value is applied to the switching unit 31 at the connection position P1. Provided in part 3. Thereby, the switching part 31 can be moved from the connection position P1 to the release position P2 by the torque acting on the switching part 31 from the intermediate part 23 side.
- the return input unit 32 that moves the switching unit 31 to the connection position P1 is provided in the restriction mechanism unit 3. Thereby, after the switching unit 31 has moved to the release position P2, the return input unit 32 can easily return the switching unit 31 to the connection position P1 (reset to the connected state).
- the return input unit 32 is provided so that one end side is fixed to the switching unit 31 and the other end side is exposed to the outside of the housing 4.
- the return input part 32 is comprised so that the switching part 31 may be moved to the connection position P1 by operation from the exterior of the housing 4.
- the reset operation can be performed from the outside of the housing 4.
- a work of disassembling a part of the housing 4 to expose the switching unit 31 and moving the switching unit 31 is not required, so that the resetting operation can be facilitated.
- connection portion 23b is configured by the connection gear provided in the intermediate portion 23.
- the switching part 31 is comprised by the sector gear which has in part the gear part 31a which meshes with the gear for a connection.
- the position where the gear part 31a of the switching part 31 and the connecting gear of the intermediate part 23 mesh can be set as the connection position P1
- the position where the meshing between the gear part 31a and the connecting gear disappears can be set as the release position P2.
- the switching unit 31 can be easily moved to the connection position P1 and the release position P2 simply by rotating the switching unit 31.
- the transmission mechanism 2 includes the input shaft 21 having the sun gear 21a, the output shaft 22 having the planetary gear 22a, and the intermediate portion 23 having the internal ring gear 23a.
- the planetary gear mechanism is included.
- the connection part 23b is provided in the outer peripheral part of the intermediate part 23.
- FIG. Thereby, the restriction mechanism part 3 and the intermediate part 23 (connection part 23b) can be connected with a simple structure in which the connection part 23b is simply provided on the outer peripheral part of the intermediate part 23.
- transmission mechanism portion 2 that transmits torque
- the switching unit 31 when the torque limiting unit 33 reaches the release position P2 where the switching unit 31 is in contact with the connecting unit 23b, the switching unit 31 is moved to the retracted position P3 that is separated from the connecting unit 23b. Configure to move. Thereby, when the switching part 31 moves to the release position P2 and the intermediate part 23 becomes idle, it is possible to prevent the intermediate part 23 (connecting part 23b) that idles and the switching part 31 from contacting each other. it can.
- the torque limiting portion 33 is configured by a ball ramp mechanism including a pair of cam portions 33a and 33b, a ball 33c, and a coil spring 33d. Further, one cam portion 33a is configured to be connected to the switching portion 31 and to be movable relative to the other cam portion 33b. Then, with the biasing force of the coil spring 33d acting on the pair of cam portions 33a and 33b, the ball moves from the boundary portion 43 corresponding to the release position P2 of the switching portion 31 toward the ball pocket 42 corresponding to the retracted position P3. An inclined path 45 is provided so as to guide 33c.
- the torque transmission mechanism is applied to a control surface driving device for an aircraft, but the present invention is not limited to this.
- the torque transmission mechanism of the present invention may be applied to other driving parts of an aircraft.
- the switching unit 31 of the limiting mechanism unit 3 is configured to rotate around the central axis O2, but the present invention is not limited to this.
- the switching unit may be configured to linearly move between the connection position and the release position (retracted position).
- the switching unit may be configured by a rack gear instead of a sector gear.
- the torque limiting unit 33 of the limiting mechanism unit 3 is configured by a ball ramp mechanism.
- the present invention is not limited to this.
- the torque limiting unit may be constituted by a multi-plate brake mechanism in which a plurality of friction plates are arranged along the axial direction A.
- the transmission mechanism section may be constituted by a differential gear mechanism other than the planetary gear mechanism shown in the above embodiment.
- the transmission mechanism 202 may be configured by a differential gear mechanism configured by a plurality of bevel gears.
- the first bevel gear 211 rotates the second bevel gear 221 and the third bevel gear 222.
- the 4th bevel gear 231 provided in the intermediate part 230 is being fixed by the restriction
- the second bevel gear 221 and the third bevel gear 222 that rotate (spin) around the shaft member 223 rotate (revolve) around the central axis O ⁇ b> 1 by meshing with the fourth bevel gear 231.
- the revolution of the second bevel gear 221 and the third bevel gear 222 is the rotation around the central axis O1 of the cylindrical output shaft 220 that supports the shaft member 223.
- the configuration of the limiting mechanism unit 3 is the same as that in the above embodiment.
- connection part 23b of the intermediate part 23 was comprised by the gear for connection (external gear), and the switching part 31 of the restriction
- limiting mechanism part 3 was comprised by the sector gear
- the present invention showed. It is not limited to this.
- the connection portion and the switching portion are configured by a combination of an engagement recess (notch) and an engagement projection (pin). May be.
- a connection portion 311 is provided on the outer peripheral portion of the intermediate portion 310 so as to protrude outward in the radial direction, and an engagement recess 312 made of a notch is provided in the connection portion 311.
- the switching portion 320 is provided with an engaging convex portion 321 made of an engaging pin so as to extend in the axial direction A.
- the switching unit 320 is rotated to be in a released state in which the engagement between the engagement convex portion 321 and the engagement concave portion 312 is released. .
- the return input unit 32 that moves the switching unit 31 that has moved to the retreat position P3 to the connection position P1 is provided, but the present invention is not limited thereto.
- the return input unit may not be provided. That is, when the switching unit moves to the release position or the retracted position, the switching unit may be moved directly to return to the original connection position. Further, when the return input portion is provided, the return input portion may not be exposed to the outside of the housing. A configuration in which a part of the housing is disassembled and the return input portion in the housing is operated, such as removing the lid, may be used.
- the switching unit need not be moved from the release position to the retracted position. In this case, there is a possibility that the switching portion at the release position and the connecting portion at the intermediate portion that idles may come into contact with each other. However, the contact portion may move from the release position to the retracted position side by the contact.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Transmission Devices (AREA)
Abstract
Description
W=T/(R×tanθ) ・・・(1)
ここで、Rは、中心軸O2からボール33cの中心までの距離(半径)(図1参照)である。また、θは、ボールランプ部41の傾斜角である。
2、202 伝達機構部
3、303 制限機構部
4 ハウジング
21、210 入力軸
21a サンギヤ
22、220 出力軸
22a プラネタリーギヤ
23、230、310 中間部
23a リングギヤ
23b、232、311 接続部
31、320 切替部
31a ギヤ部分
32 復帰入力部
33 トルク制限部
33a、33b カム部
33c ボール
33d コイルバネ(付勢部材)
41 ボールランプ部
42 ボールポケット(第2部分)
43 境界部分(第1部分)
45 傾斜路
P1 接続位置
P2 解除位置
P3 退避位置
Claims (8)
- 入力軸と、出力軸と、接続部を有する中間部とを含み、前記入力軸に入力される入力トルクを前記中間部を介して前記出力軸に伝達する伝達機構部と、
前記接続部と接続されて前記中間部の回転を規制する接続状態と、前記接続部との接続が解除されて前記中間部の回転を許容する解除状態との間で切り替え可能であるとともに、前記接続状態で所定以上のトルクが作用した場合に、前記解除状態に切り替えられるように構成された制限機構部とを備える、トルク伝達機構。 - 前記制限機構部は、
前記接続状態で前記接続部と係合する接続位置と、前記解除状態で前記接続部との係合が解除される解除位置とに移動可能な切替部と、
前記切替部を支持するとともに、前記接続位置にある前記切替部に所定以上のトルクが作用した場合に、前記切替部の前記解除位置側への移動を許容するトルク制限部とを含む、請求項1に記載のトルク伝達機構。 - 前記制限機構部は、前記切替部を前記接続位置に移動させる復帰入力部をさらに含む、請求項2に記載のトルク伝達機構。
- 前記制限機構部を収容するハウジングをさらに備え、
前記復帰入力部は、一端側が前記切替部に固定されるとともに、他端側が前記ハウジングの外部に露出するように設けられ、前記ハウジングの外部からの操作により前記切替部を前記接続位置に移動させるように構成されている、請求項3に記載のトルク伝達機構。 - 前記接続部は、前記中間部に設けられた接続用ギヤであり、
前記切替部は、前記接続用ギヤと噛み合うギヤ部分を一部に有するセクターギヤである、請求項2に記載のトルク伝達機構。 - 前記伝達機構部は、サンギヤを有する前記入力軸と、プラネタリーギヤを有する前記出力軸と、内歯のリングギヤを有する前記中間部とを含む遊星歯車機構であり、
前記接続部は、前記中間部の外周部に設けられている、請求項1に記載のトルク伝達機構。 - 前記トルク制限部は、前記切替部が前記接続部と接する前記解除位置に到達した場合に、前記切替部を前記接続部から離間する退避位置に移動させるように構成されている、請求項2に記載のトルク伝達機構。
- 前記トルク制限部は、ボールランプ部を有する一対のカム部と、前記一対のカム部の間に配置されたボールと、前記一対のカム部を互いに近付く方向に付勢する付勢部材とを含むボールランプ機構であり、
前記一対のカム部は、一方が前記切替部と接続されるとともに他方に対して相対移動可能に構成され、前記付勢部材の付勢力が働いている状態で、前記切替部の前記解除位置に対応する第1部分から前記退避位置に対応する第2部分に向けて前記ボールを誘導するように傾斜した傾斜路を有する、請求項7に記載のトルク伝達機構。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US15/307,696 US10006494B2 (en) | 2014-04-28 | 2014-04-28 | Torque transmission mechanism |
JP2016515773A JP6252672B2 (ja) | 2014-04-28 | 2014-04-28 | トルク伝達機構 |
EP14890795.9A EP3139057B1 (en) | 2014-04-28 | 2014-04-28 | Torque transmission mechanism |
PCT/JP2014/061825 WO2015166525A1 (ja) | 2014-04-28 | 2014-04-28 | トルク伝達機構 |
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PCT/JP2014/061825 WO2015166525A1 (ja) | 2014-04-28 | 2014-04-28 | トルク伝達機構 |
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EP (1) | EP3139057B1 (ja) |
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US11160998B2 (en) * | 2017-10-31 | 2021-11-02 | Honeywell International Inc. | Fall energy limiter |
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JP2009063163A (ja) * | 2007-08-09 | 2009-03-26 | Honda Motor Co Ltd | クラッチ |
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2014
- 2014-04-28 WO PCT/JP2014/061825 patent/WO2015166525A1/ja active Application Filing
- 2014-04-28 US US15/307,696 patent/US10006494B2/en active Active
- 2014-04-28 EP EP14890795.9A patent/EP3139057B1/en active Active
- 2014-04-28 JP JP2016515773A patent/JP6252672B2/ja active Active
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JPS57196829U (ja) * | 1981-06-11 | 1982-12-14 | ||
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JPH061862U (ja) * | 1992-06-10 | 1994-01-14 | 株式会社椿本エマソン | 手動復帰式過負荷保護装置の復帰機構 |
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Also Published As
Publication number | Publication date |
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EP3139057B1 (en) | 2019-10-23 |
EP3139057A1 (en) | 2017-03-08 |
US20170045092A1 (en) | 2017-02-16 |
EP3139057A4 (en) | 2017-05-17 |
JPWO2015166525A1 (ja) | 2017-04-20 |
JP6252672B2 (ja) | 2017-12-27 |
US10006494B2 (en) | 2018-06-26 |
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