Classifications

• • 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
  • F16D41/00—Freewheels or freewheel clutches
  • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
  • F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
• • 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
  • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00

Definitions

• This disclosure relates to a reverse input cutoff clutch that transmits rotational torque input to an input member to an output member, while completely blocking rotational torque input to the output member and not transmitting it to the input member, or that transmits only a portion of the torque to the input member and cuts off the remainder.
• a reverse input cutoff clutch has an input member that is connected to an input mechanism such as a drive source, and an output member that is connected to an output mechanism such as a reduction mechanism. It transmits the rotational torque input to the input member to the output member, while completely cutting off the rotational torque that is reversely input to the output member, either by not transmitting it to the input member, or by transmitting only a portion of it to the input member and cutting off the remainder.
• Reverse input cutoff clutches are broadly divided into locking and free types, depending on the mechanism that cuts off the rotational torque that is reversely input to the output member.
• a locking reverse input cutoff clutch is equipped with a mechanism that prevents the output member from rotating when rotational torque is reversely input to the output member.
• a free type reverse input cutoff clutch is equipped with a mechanism that causes the output member to spin freely when rotational torque is input to the output member. Whether to use a locking reverse input cutoff clutch or a free type reverse input cutoff clutch is determined appropriately based on factors such as the application of the device into which the reverse input cutoff clutch is incorporated.
• International Publication No. WO 2019/026794 describes a locking reverse input cutoff clutch.
• the reverse input cutoff clutch described in International Publication No. 2019/026794 includes a pressed member, an input member, an output member, and an engaging element.
• the input member has an input-side engagement portion located radially inward of the pressed surface and is arranged coaxially with the pressed surface.
• the pressed member has a pressed surface on its inner circumferential surface.
• the input member has an input-side engagement portion located radially inward of the pressed surface and is arranged coaxially with the pressed surface.
• the output member has an output-side engagement portion that is located radially inward of the pressed surface and radially inward of the input-side engagement portion, and is arranged coaxially with the pressed surface.
• the engaging element has a pressing surface facing the pressed surface, an input-side engaged portion that can engage with the input-side engaging portion, and an output-side engaged portion that can engage with the output-side engaging portion, and is arranged so that it can move in a first direction, which is the direction in which the pressing surface moves towards or away from the pressed surface.
• the input side engaging portion engages with the input side engaged portion, and the engaging element moves in the first direction away from the pressed surface, engaging the output side engaged portion with the output side engaging portion, thereby transmitting the rotational torque input to the input member to the output member.
• the output side engaging portion engages with the output side engaged portion, and the pressing surface is pressed against the pressed surface, causing frictional engagement between the pressing surface and the pressed surface.
• the pressed member is A fixed element that does not rotate during use; a movable element supported radially inside the fixed element so as to be rotatable relative to the fixed element, the movable element having the pressed surface;
• the device further includes a coupling member that is stretched across the fixed element and the movable element so as to be capable of being engaged with and disengaged from at least one of the fixed element and the movable element.
• the pressed member prevents the movable element from rotating relative to the fixed element by engaging the connecting member with the fixed element and the movable element, whereas the pressed member allows the movable element to rotate relative to the fixed element by disengaging the connecting member from at least one of the fixed element and the movable element.
• the pressed member may have a rolling bearing disposed between the fixed element and the movable element.
• the coupling member can be configured as a bolt having a male threaded portion on its outer circumferential surface that threads into a female threaded portion provided on the fixed side engagement portion or the movable side engagement portion.
• the fixed-side engagement portion can be configured as a fixed-side engagement hole formed in a twisted position relative to the central axis of the pressed surface.
• both sides of the connecting member in the extension direction engage with the fixed-side engagement hole, and the middle portion of the connecting member in the extension direction engages with the movable-side engagement portion.
• the movable engaging portion can be configured as a recessed groove formed on the outer peripheral surface of the movable element.
• the movable engaging portion can be configured with a flat surface.
• the fixed side engagement portion can be configured as a fixed side engagement hole that penetrates radially
• the movable side engagement portion can be configured as a movable side engagement hole that opens onto the outer circumferential surface.
• the fixed side engagement portion can be configured as a fixed side engagement hole that penetrates in the axial direction
• the movable side engagement portion can be configured as a movable side engagement hole that opens in the axial direction.
• a reverse input cutoff clutch may include a biasing member that elastically biases the engaging element in a direction that brings it closer to the pressed surface.
• the reverse input blocking clutch disclosed herein it is possible to switch between enabling and disabling the reverse input blocking function, which prevents torque reversely input to the output member from being transmitted to the input member.
• FIG. 1(A) is a perspective view of a reverse input cutoff clutch of a first example of an embodiment of the present disclosure
• FIG. 1(B) is an end view of the reverse input cutoff clutch of the first example as viewed from the input member side in the axial direction
• FIG. 2 is a cross-sectional view taken along line AA in FIG. 1(B).
• FIG. 3 is a cross-sectional view taken along the line B1-B2-B3-B4 of FIG.
• FIG. 4 is a cross-sectional view taken along the line CC in FIG. 2, with the biasing member omitted.
• FIG. 5 is a view similar to FIG. 4, showing a state in which a rotational torque is input to the input member.
• FIG. 6 is a view similar to FIG.
• FIG. 7 is an exploded perspective view of the reverse input cutoff clutch of the first example.
• FIG. 8 is a cross-sectional view showing a pressed member of a reverse input cutoff clutch according to a second example of an embodiment of the present disclosure.
• FIG. 9 is a cross-sectional view showing a pressed member of a reverse input cutoff clutch according to a third example of an embodiment of the present disclosure.
• FIG. 10A is a cross-sectional view showing a pressed member of a reverse input cutoff clutch according to a fourth example of an embodiment of the present disclosure
• FIG. 10B is a perspective view showing a movable element.
• FIG. 11A is a perspective view showing a pressed member of a reverse input cutoff clutch according to a fifth example of an embodiment of the present disclosure
• FIG. 11B is a side view of the pressed member.
• FIG. 12 is a cross-sectional view showing a pressed member of a reverse input cutoff clutch according to a sixth example of an embodiment of the present disclosure.
• FIG. 13 is a cross-sectional view showing a pressed member of a reverse input cutoff clutch according to a seventh example of an embodiment of the present disclosure.
• the axial, radial, and circumferential directions refer to the axial, radial, and circumferential directions of the reverse input disconnection clutch 1.
• the axial, radial, and circumferential directions of the reverse input disconnection clutch 1 coincide with the axial, radial, and circumferential directions of the input member 3, coincide with the axial, radial, and circumferential directions of the pressed surface 6, and coincide with the axial, radial, and circumferential directions of the output member 4.
• one axial side refers to the input member 3 side (the right side in Figure 2), and the other axial side refers to the output member 4 side (the left side in Figure 2).
• the reverse input cutoff clutch 1 of this example includes a pressed member 2, an input member 3, an output member 4, and an engaging element 5.
• the reverse input cutoff clutch 1 transmits the rotational torque input to the input member 3 to the output member 4, but has a reverse input cutoff function that either completely cuts off the rotational torque that is reversely input to the output member 4 and does not transmit it to the input member 3, or transmits only a portion of it to the input member 3 and cuts off the remainder, and the reverse input cutoff function can be switched between enabled and disabled.
• the pressed member 2 has a pressed surface 6 on its inner circumferential surface.
• the input-side engaging portion 31 of the input member 3 and the output-side engaging portion 38 of the output member 4 are disposed radially inside the pressed surface 6.
• the input-side engaging portion 31, the output-side engaging portion 38, and the engaging element 5 are capable of rotating radially inside the pressed surface 6 around the central axis of the pressed surface 6.
• the pressed surface 6 forms a surface that comes into contact with the pressing surface 50 of the engaging element 5 when the engaging element 5 moves in a direction approaching the pressed surface 6.
• the pressed surface 6 has a circular ring shape when viewed in the axial direction, and although not limited to this, in this example it has a cylindrical surface shape whose inner diameter does not change in the axial direction.
• the pressed member 2 comprises a fixed element 7 that does not rotate even when in use, a movable element 8 that is supported radially inward of the fixed element 7 so as to be able to rotate relative to the fixed element 7 and has a pressed surface 6, and a connecting member 9 that spans the fixed element 7 and the movable element 8 so as to be able to engage and disengage with at least one of the fixed element 7 and the movable element 8.
• the pressed member 2 prevents the movable element 8 from rotating relative to the fixed element 7 by engaging the connecting member 9 with the fixed element 7 and the movable element 8, and allows the movable element 8 to rotate relative to the fixed element 7 by disengaging the connecting member 9 from at least one of the fixed element 7 and the movable element 8.
• the reverse input blocking function is switched to enabled.
• the coupling member 9 disengages from at least one of the fixed element 7 and the movable element 8, allowing the movable element 8 to rotate relative to the fixed element 7, the reverse input blocking function is switched to disabled.
• the coupling member 9 is disposed between the fixed element 7 and the movable element 8, allowing the coupling member 9 to be engaged with or disengaged from either the fixed element 7 or the movable element 8, or to be engaged with or disengaged from both the fixed element 7 and the movable element 8.
• the coupling member 9 In normal use of the reverse input cutoff clutch 1 after it has been installed in the torque transmission path of a mechanical device, the coupling member 9 is engaged across both the fixed element 7 and the movable element 8. In this state, the reverse input cutoff clutch 1's reverse input cutoff function is active, and it transmits the rotational torque input to the input member 3 to the output member 4, while completely cutting off the rotational torque reversely input to the output member 4 and not transmitting it to the input member 3, or it transmits only a portion of it to the input member 3 and cuts off the remainder.
• the coupling member 9 can be removed by pulling it out from at least one of the fixed element 7 and the movable element 8 using any means, such as a tool, to disengage the coupling member 9 from at least one of the fixed element 7 and the movable element 8.
• the engagement between the fixed element 7 and the movable element 8 and the coupling member 9 in the reverse input cutoff clutch 1 can be any configuration as long as the coupling member 9 can be engaged and disengaged with either the fixed element 7 or the movable element 8.
• a preferred form of engagement is a mechanical coupling that prevents relative axial separation, relative radial movement, and relative rotation between the fixed element 7 and the movable element 8 when the coupling member 9 is suspended across the fixed element 7 and the movable element 8 in at least one of the axial, radial, and circumferential directions (including the direction of extension of the string), and allows relative rotation between the fixed element 7 and the movable element 8 when the coupling member 9 is disengaged from at least one of the fixed element 7 and the movable element 8, and then allows the fixed element 7 and the movable element 8 to return to their coupled state.
• the coupling member 9 is constructed of a solid columnar member or a hollow cylindrical member including a mechanical coupling material such as a bolt, pin, or key
• the fixed element 7 and the movable element 8 be provided with an engagement portion for the coupling member 9.
• the engagement between the fixed element 7 and the movable element 8 and the coupling member 9 in this example will be described in more detail below, but the present disclosure is not limited to this.
• the fixed element 7 is supported and fixed to a fixed part that does not rotate even when the housing or the like is in use, or is configured by the fixed part itself.
• the specific structure of the fixed element 7 is arbitrary as long as it has a structure for supporting the movable element 8 on the radially inner side and a structure for engaging with a part of the connecting member 9.
• the fixed element 7 has a fixed-side engaging part 10.
• the fixed-side engaging part 10 configures a part that engages with a part of the connecting member 9.
• the shape, forming direction, and forming position of the fixed-side engaging portion 10 are not particularly limited as long as they correspond to the structure of the connecting member 9 and can realize the function of the fixed-side engaging portion 10.
• the fixed-side engaging portion 10 can have any structure, such as a hole, groove, surface, or protrusion.
• the connecting member 9 is configured as a solid column or a hollow cylinder
• the fixed-side engaging portion 10 can be configured as an engaging hole.
• the fixed-side engaging portion 10 can be formed, for example, so as to be in a twisted position with respect to the central axis O7 of the fixing element 7.
• the fixed-side engaging portion 10 can be formed so that the central axis O10 of the fixed-side engaging portion 10 and the central axis O7 of the fixing element 7 intersect with each other at an intersection.
• the fixed-side engaging portion 10 can be formed in the axial or radial direction.
• the fixed-side engaging portion 10 has a cross-sectional shape corresponding to the cross-sectional shape of the connecting member 9.
• the fixed-side engaging portion 10 is formed so as to be skewed with respect to the central axis O7 of the fixed element 7, and is configured as a fixed-side engaging hole having a circular cross-sectional shape.
• the central axis O7 of the fixed element 7 and the central axis O10 of the fixed-side engaging portion 10 are disposed apart in the radial direction of the fixed element 7, and the fixed-side engaging portion 10 is formed so that the central axis O7 of the fixed element 7 and the central axis O10 of the fixed-side engaging portion 10 are perpendicular to each other (so that the central axis O10 forms one chord of a circle centered on the central axis O7 ) when viewed in a direction perpendicular to the central axis O7 of the fixed element 7 and the central axis O10 of the fixed-side engaging portion 10 (the up-and-down direction
• the fixing element 7 has an inner circumferential surface that is a stepped cylindrical surface.
• the inner circumferential surface of the fixing element 7 includes a large-diameter cylindrical surface portion 11 on one axial side, a small-diameter cylindrical surface portion 12 on the other axial side, and a connecting surface portion 13 that connects the large-diameter cylindrical surface portion 11 and the small-diameter cylindrical surface portion 12 and faces the one axial side.
• the large-diameter cylindrical surface portion 11 has a locking groove 14 around its entire circumference in the middle axial portion.
• the fixing element 7 has a cylindrical outer surface that does not change in the axial direction.
• the fixing element 7 has a thin-walled portion 15 on one axial side and a thick-walled portion 16 on the other axial side, and is configured to be approximately cylindrical overall.
• the fixed-side engaging portion 10 has holes 17a, 17b, which open to the outer circumferential surface and inner circumferential surface (small-diameter cylindrical surface portion 12) of the thick-walled portion 16 and have a circular cross-sectional shape, at both sides in the extension direction, and a groove 18, which opens to the small-diameter cylindrical surface portion 12 and has a circular cross-sectional shape, at an intermediate portion in the extension direction.
• the number of fixed-side engagement portions 10 is determined according to the number of connecting members 9, and if the connecting members 9 are made up of multiple connecting members 9, the fixed-side engagement portions 10 are also made up of multiple fixed-side engagement portions 10.
• the connecting member 9 is composed of two connecting members 9. Therefore, the fixed side engaging portion 10 is composed of two fixed side engaging portions 10, matching the number of connecting members 9. The two fixed side engaging portions 10 are located at two radially opposite sides of the thick portion 16.
• the movable element 8 is normally coupled to the fixed element 7 via the coupling member 9, and is prevented from rotating relative to the fixed portion. However, when necessary, such as when a malfunction occurs in a mechanical device incorporating the reverse input cutoff clutch 1, the coupling with the fixed element 7 is released, and the pressed surface 6 and the pressing surface 50 of the engaging element 5 are engaged, allowing the input member 3, the output member 4, and the engaging element 5 to rotate together.
• the specific structure of the movable element 8 is arbitrary, as long as it has a structure that engages with the remaining portion of the coupling member 9.
• the movable element 8 has a movable-side engaging portion 19.
• the movable-side engaging portion 19 constitutes the portion that engages with the remaining portion of the coupling member 9 that is not engaged with the fixed-side engaging portion 10.
• the shape, forming direction, and forming position of the movable-side engaging portion 19 are not particularly limited as long as it can engage with the remaining portion of the coupling member 9.
• the movable-side engaging portion 19 can have any structure, such as a hole, groove, surface, or protrusion.
• the coupling member 9 is configured in a columnar or cylindrical shape
• the movable-side engaging portion 19 can be configured with an engaging hole, a recessed groove, or a flat surface.
• the movable-side engaging portion 19 can be formed so as to be in a twisted position with respect to the central axis O7 of the fixed element 7, or can be formed in the axial or radial direction.
• the movable-side engaging portion 19 has a cross-sectional shape that corresponds to the cross-sectional shape of the coupling member 9.
• the movable-side engagement portion 19 is formed on the outer peripheral surface of the movable element 8 and is configured as a recessed groove having an arc-shaped cross section.
• the movable element 8 is positioned radially inside the fixed element 7.
• a structure that supports the movable element 8 so that it can rotate relative to the fixed element 7 can include a structure in which at least a portion of the movable element 8 is fitted radially inside the fixed element 7 directly or via another member such as a bearing.
• the movable element 8 has an inner circumferential surface in the shape of a stepped cylindrical surface, as shown in Figure 2.
• the inner circumferential surface of the movable element 8 includes a large-diameter cylindrical surface portion 20 on one axial side, a small-diameter cylindrical surface portion 21 on the other axial side, and a connecting surface portion 22 that connects the large-diameter cylindrical surface portion 20 and the small-diameter cylindrical surface portion 21 and faces the one axial side.
• the large-diameter cylindrical surface portion 20 forms the pressed surface 6.
• the movable element 8 has an outer peripheral surface in the shape of a stepped cylindrical surface.
• the outer peripheral surface of the movable element 8 includes a large-diameter cylindrical surface portion 23 on one axial side, a small-diameter cylindrical surface portion 24 on the other axial side, and a connecting surface portion 25 that connects the large-diameter cylindrical surface portion 23 and the small-diameter cylindrical surface portion 24 and faces the other axial side.
• the movable-side engaging portion 19 which is formed by a recessed groove, is formed on the other axial side of the small-diameter cylindrical surface portion 24 so as to be at a twisted position with respect to the central axis of the movable element 8.
• the movable-side engaging portion 19 is formed so that the central axis O19 of the movable-side engaging portion 19 and the central axis O7 of the fixed element 7 intersect at an intersection.
• the connecting member 9 is composed of two connecting members 9. Therefore, the movable side engaging portion 19 is composed of two movable side engaging portions 19, matching the number of connecting members 9. The two movable side engaging portions 19 are formed at two radially opposite locations on the other axial side portion of the small diameter cylindrical surface portion 24.
• the movable element 8 has an inward flange portion 26 that protrudes radially inward at the axial end of the small-diameter cylindrical surface portion 21.
• the material and structure of the coupling member 9 are arbitrary as long as it can be engaged with and disengaged from at least one of the fixed element 7 and the movable element 8 and can prevent relative rotation between the fixed element 7 and the movable element 8.
• the material that constitutes the coupling member 9 can be metal, such as an iron-based alloy or a light alloy, or synthetic resin.
• the coupling member 9 can have any structure that can mechanically couple the fixed element 7 and the movable element 8, depending on the structure of the fixed element 7 including the fixed side engagement portion 10.
• the coupling member 9 can be composed of a columnar or cylindrical member that includes a bolt, pin, key, etc.
• the connecting member 9 When the connecting member 9 is constructed using a bolt, at least a portion of one of the fixed-side engaging portion 10 and the movable-side engaging portion 19 is constructed using a threaded hole.
• the male thread provided on the outer surface of the connecting member 9 is threaded into the threaded hole, and the base end portion of the connecting member 9 is positioned (engaged) inside the other of the fixed-side engaging portion 10 and the movable-side engaging portion 19.
• the connecting member 9 can be configured as a partially cut-out cylindrical spring pin with a linear or wavy slit at one location along its circumference.
• the cross-sectional shape of the connecting member 9 is not limited to a circle, but can also be a non-circular shape such as a partial circle or a polygon. It is preferable that the cross-sectional shapes of the fixed-side engaging portion 10 provided on the fixed element 7 and the movable-side engaging portion 19 provided on the movable element 8 be determined according to the cross-sectional shape of the connecting member 9.
• the connecting member 9 is composed of a pin, which is a solid columnar member with a circular cross-section.
• the connecting member 9 has tapered portions 71 at both ends in the extension direction, with the outer diameter decreasing toward both sides in the extension direction. This makes it easier to insert (press-fit) the connecting member 9 into the fixed-side engagement portion 10.
• Both sides of the connecting member 9 in the extension direction engage with both sides of the fixed-side engagement portion 10 in the extension direction, and the middle part of the connecting member 9 in the extension direction engages with the middle part of the fixed-side engagement portion 10 in the extension direction and the movable-side engagement portion 19.
• both ends of the connecting member 9 in the extension direction are press-fitted or lightly press-fitted into the holes 17a and 17b, and the middle part of the connecting member 9 in the extension direction is positioned without any rattle between the groove 18 and the movable-side engagement part 19.
• the fit strength of both ends of the connecting member 9 in the extension direction with the holes 17a and 17b is strong enough to prevent the connecting member 9 from falling out of the holes 17a and 17b due to vibrations associated with operation of a mechanical device incorporating the reverse input cut-off clutch 1, and is strong enough to allow the connecting member 9 to be pulled out of the holes 17a and 17b by applying an axial force to the connecting member 9 when it is necessary to allow relative rotation of the movable element 8 with respect to the fixed element 7.
• the pressed member 2 further includes a rolling bearing 27, which is an optional element, arranged between the fixed element 7 and the movable element 8. It is also possible to support the movable element 8 radially inside the fixed element 7 so that it can rotate relative to the fixed element 7 by directly fitting at least a portion of the inner circumferential surface of the fixed element 7 with at least a portion of the outer circumferential surface of the movable element 8.
• the rolling bearing 27 it is possible to more easily rotate the movable element 8 while the fixed element 7 and the movable element 8 are in a state where they can rotate relative to each other.
• the rolling bearing 27 may be omitted.
• the rolling bearing 27 has an outer ring 28 fitted inside the fixed element 7, an inner ring 29 fitted outside the movable element 8, and a plurality of rolling elements 30 arranged to roll freely between the outer ring 28 and the inner ring 29.
• the outer ring 28 is fitted securely into the other axial side of the large-diameter cylindrical surface portion 11, and is axially sandwiched between the connection surface portion 13 and the retaining ring 62 engaged in the engagement groove 14.
• the inner ring 29 is fitted securely onto one axial side of the small-diameter cylindrical surface portion 24, and its end face on that side abuts against the connecting surface portion 25.
• the rolling bearing 27 is a single-row, deep-groove ball bearing that uses balls as the rolling elements 30.
• the rolling bearing 27 can also be an angular contact ball bearing or a roller bearing that uses cylindrical rollers as the rolling elements 30, or it can be made up of a combination of multiple rolling bearings.
• the input member 3 is rotatably supported by the fixed portion, and is disposed coaxially with the pressed surface 6.
• the input member 3 is connected to an input side mechanism such as a drive source, and receives an input of rotational torque, and is configured to be rotatable radially inside the pressed surface 6 due to the input of the rotational torque.
• the input member 3 has an input-side engaging portion 31 located radially inward of the pressed surface 6.
• the input-side engaging portion 31 is located radially outward from the rotation center O of the input member 3, and has a portion that engages with the input-side engaged portion 51 of the engager 5.
• the input-side engaging portion 31 is configured so that its radially inner surface 34 engages (contacts) with the radially inner surface 53 of the input-side engaged portion 51 as the input member 3 or the engager 5 rotates.
• the input member 3 has an input side engagement portion 31, an input shaft portion 32, and an input flange portion 33.
• the input-side engagement portion 31 protrudes toward the other axial direction from a portion of the side surface of the input flange portion 33 that is radially outward from the rotation center O.
• the engaging elements 5 are composed of two engaging elements 5. Therefore, the input side engaging portion 31 is composed of two input side engaging portions 31 to match the number of engaging elements 5.
• the two input side engaging portions 31 are arranged at two radially opposite positions on the other axial side surface of the input flange portion 33, and are spaced apart from each other in the radial direction of the input member 3. Furthermore, each input side engaging portion 31 has a shape that is symmetrical in the circumferential direction.
• each input side engaging portion 31 has an end face shape that is generally fan-shaped or trapezoidal, with the circumferential width increasing radially outward when viewed from the axial direction.
• the radial inner surface 34 of each input side engaging portion 31 is composed of flat surfaces that are parallel to each other, and the radial outer surface 35 of each input side engaging portion 31 has the same cylindrical contour shape as the outer circumferential surface of the input flange portion 33.
• the two circumferential side surfaces 36 of each input side engaging portion 31 are composed of flat surfaces that slope away from each other radially outward.
• the radial inner surface 34 and the circumferential side surfaces 36 are connected by a curved surface portion 37 that has a contour shape that is generally arc-shaped when viewed from the axial direction.
• the output member 4 is rotatably supported by the pressed member 2 or the fixed portion, and is arranged coaxially with the pressed surface 6. In other words, the output member 4 is also arranged coaxially with the input member 3.
• the output member 4 is connected to an output mechanism such as a reduction mechanism, and is configured to output rotational torque to the output mechanism as it rotates.
• the output member 4 has an output side engaging portion 38 that is positioned radially inward of the input side engaging portion 31 on the radial inside of the pressed surface 6.
• the output side engaging portion 38 is radially inward of the input side engaging portion 31, but has a portion that is radially outward from the rotation center O of the output member 4, and this portion is positioned in a position where it can engage with the output side engaged portion 52 of the engager 5.
• the output side engaging portion 38 is configured so that this portion engages with the output side engaged portion 52 as the output member 4 or the engager 5 rotates.
• the output member 4 has an output side engagement portion 38, an output shaft portion 39, an output flange portion 40, and a small diameter shaft portion 41.
• the output shaft portion 39 has a stepped cylindrical shape.
• the output side engagement portion 38 protrudes from the center of one axial side surface of the output shaft portion 39 toward one axial side.
• the output side engaging portion 38 There are no restrictions on the shape of the output side engaging portion 38, as long as it is configured to have a portion that engages with the output side engaged portion 52. Furthermore, the number of portions of the output side engaging portion 38 that engage with the output side engaged portion 52 is determined according to the number of engaging elements 5, and when the engaging elements 5 are configured with multiple engaging elements 5, the output side engaging portion 38 is also configured to have multiple engaging portions. Note that even when the engaging element is configured with a single engaging element, the output side engaging portion can have multiple engaging portions.
• the outer peripheral surface of the output side engagement portion 38 is composed of two parallel flat surfaces 42 and two convex curved surfaces 43, each of which is a partial cylindrical surface. Therefore, the distance from the rotation center O of the output member 4 to the outer peripheral surface of the output side engagement portion 38 is not constant along the circumference.
• Each of the two convex curved surfaces 43 is composed of a partial cylindrical surface centered on the rotation center O of the output member 4.
• the output side engagement portion 38 is plane-symmetrical with respect to an imaginary plane that passes through the rotation center O of the output member 4 and is perpendicular to the flat surface 42. Furthermore, the output side engagement portion 38 is plane-symmetrical with respect to an imaginary plane that passes through the rotation center O of the output member 4 and is parallel to the flat surface 42.
• Such an output side engagement portion 38 is positioned between the two input side engagement portions 31.
• the output member 4 is rotatably supported radially inside the movable element 8 of the pressed member 2 by a radial rolling bearing 44.
• the outer ring 45 of the radial rolling bearing 44 is fitted securely into the small-diameter cylindrical surface portion 21 and is axially sandwiched between the side surface on one axial side of the inward flange portion 26 and a retaining ring 46a engaged with the end portion on one axial side of the small-diameter cylindrical surface portion 21.
• the small diameter shaft portion 41 of the output member 4 is supported by a sliding bearing (sleeve) 49 on the inside of the input member 3, allowing free relative rotation with respect to the input member 3.
• the engaging element 5 has a pressing surface 50 facing the pressed surface 6, an input side engaged portion 51 engageable with the input side engaging portion 31, and an output side engaged portion 52 engageable with the output side engaging portion 38, and is arranged so as to be able to move in a first direction, which is the direction towards or away from the pressed surface 6.
• the engaging element 5 can be configured as a single engaging element 5 having such a configuration, or as two or more engaging elements 5.
• the pressing surface 50 is provided on the radially outer surface of the engaging element 5 facing the pressed surface 6.
• the pressing surface 50 is composed of two pressing surfaces 50 provided at two positions on the radially outer surface of the engaging element 5 that are spaced apart in the circumferential direction.
• Each pressing surface 50 is composed of a partially cylindrical convex curved surface with a radius of curvature smaller than the radius of curvature of the pressed surface 6.
• Pressing surface 50 preferably has a surface texture that provides a higher coefficient of friction with pressed surface 6 than the other parts of engaging element 5. Furthermore, pressing surface 50 can be formed integrally with the other parts of engaging element 5, or it can be formed from the surface of a friction material fixed to the other parts of engaging element 5 by pasting, bonding, or the like.
• the input-side engaged portion 51 is provided in the radially intermediate portion of the widthwise center of the engaging element 5. More specifically, although not limited to this, the input-side engaged portion 51 has a generally arch-shaped opening when viewed axially, and is configured as a through-hole that axially passes through the radially intermediate portion of the widthwise center of the engaging element 5.
• the input-side engaged portion 51 is sized to allow the input-side engaging portion 31 to be inserted loosely. Therefore, when the input-side engaging portion 31 is inserted inside the input-side engaged portion 51, there is a gap between the input-side engaging portion 31 and the inner surface of the input-side engaged portion 51 in both the width direction and radial direction of the engaging element 5. As a result, the input-side engaging portion 31 can be displaced relative to the input-side engaged portion 51 in the rotational direction of the input member 3, and the input-side engaged portion 51 can be displaced radially relative to the input-side engaging portion 31.
• the shape of the input-side engaged portion 51 there are no restrictions on the shape of the input-side engaged portion 51, as long as it is configured to be able to engage with the input-side engaging portion 31.
• the radially inner surface 53 facing radially outward is composed of a flat surface perpendicular to the first direction
• the radially outer surface 54 of the inner surfaces of the input side engaged portion 51 facing radially inward is composed of a curved surface having a substantially arc-shaped outline when viewed from the axial direction, or a compound surface having a substantially V-shaped outline.
• the circumferential side surfaces 55 connecting both ends of the radially inner surface 53 on the second direction and both ends of the radially outer surface 54 on the second direction are composed of a partially cylindrical concave curved surface.
• the output-side engaged portion 52 is provided in the widthwise center of the radially inner surface of the engaging element 5. There are no restrictions on the shape of the output-side engaged portion 52, as long as it is configured to be able to engage with the output-side engaging portion 38.
• the engaging element 5 has a flat surface portion 56 on its radially inner surface that is perpendicular to the radial direction of the engaging element 5, and the flat surface portion 56 has two protrusions 57 that protrude radially inward at two locations in the width direction of the engaging element 5.
• the output-side engaged portion 52 is formed by the portion of the flat surface portion 56 that exists between the two protrusions 57 in the width direction. Note that in this example, the width dimension of the output-side engaged portion 52, i.e., the distance between the two protrusions 57, is greater than the width dimension of the flat surface 42 of the output-side engaging portion 38.
• the pressing surfaces 50 of the two engaging elements 5 face radially opposite each other, and the flat surface portions 56 face each other.
• Each engaging element 5 is positioned radially inward of the movable element 8, allowing movement in a first direction, which is the radial direction of each engaging element 5 and corresponds to the direction in which the pressing surface 50 approaches or approaches the pressed surface 6.
• the two input-side engaging portions 31 of the input member 3 positioned on one axial side are axially inserted into the input-side engaged portions 51 of the two engaging elements 5, and the output-side engaging portion 38 of the output member 4 positioned on the other axial side is axially inserted between the output-side engaged portions 52 of the two engaging elements 5.
• the two engaging elements 5 are positioned so that the output-side engaging portion 38 is sandwiched from the radial outside by the output-side engaged portions 52.
• the inner diameter of the movable element 8 and the radial dimensions of the engaging elements 5 are regulated so that when the two engaging elements 5 are positioned radially inside the movable element 8, there is a gap between the pressed surface 6 and the two pressing surfaces 50, and at least one of the gaps between the tip surfaces of the two pairs of protrusions 57 formed by the two opposing protrusions 57 of the two engaging elements.
• the reverse input disconnecting clutch 1 of this example further includes a biasing member 58 as an optional component.
• the biasing member 58 elastically biases the engaging element 5 in a direction that brings it closer to the pressed surface 6.
• the biasing member 58 can be made of a spring such as a leaf spring, coil spring, or disc spring, or an elastic material such as rubber, elastomer, or synthetic resin. There is no particular limit to the number of biasing members 58, and it can be determined appropriately depending on the number of engaging elements 5.
• the biasing member 58 is composed of two biasing members 58 arranged at two widthwise positions between the radially inner surfaces of the two engaging elements 5, and each biasing member 58 is composed of a compression coil spring.
• a protrusion 57 is inserted into the inside of each biasing member 58 on both ends in the extension direction. This prevents each biasing member 58 from falling out from between the two engaging elements 5.
• the reverse input disconnecting clutch 1 of this example further includes two spacers 59 and a stopper member 60 as optional components.
• Each spacer 59 functions to regulate the axial position of the engaging element 5 relative to the output member 4.
• each spacer 59 is configured in a flat plate shape, with an end face shape that is roughly oval or roughly rectangular when viewed in the axial direction.
• Each spacer 59 has a through hole 61 through which the output side engaging portion 38 can be inserted without rattle.
• Each spacer 59 is positioned on both axial sides of the two engaging elements 5, with the output side engaging portion 38 inserted into the through hole 61 without rattle.
• the stopper member 60 functions to prevent the spacer 59 on one axial side of the two spacers 59 from moving to that side and falling off the output member 4.
• the stopper member 60 is configured as a segmented annular retaining ring. The stopper member 60 is engaged with the other axial end of the small diameter shaft portion 41.
• the two engaging elements 5 move in a direction away from the pressed surface 6, regardless of the rotational direction of the input member 3. More specifically, as shown in Figure 5, the input side engaging portion 31 rotates inside the input side engaged portion 51 in the rotational direction of the input member 3 (counterclockwise in the example of Figure 5).
• the radially inner surface 34 or curved surface 37 of the input-side engaging portion 31 presses the radially inner surface 53 of the input-side engaged portion 51 radially inward, causing the engaging element 5 to move in a direction away from the pressed surface 6.
• the two engaging elements 5 move radially inward, that is, toward each other, causing the radially inner surfaces of the two engaging elements 5 to approach each other, and the output-side engaging portion 38 of the output member 4 to be clamped from both radial sides by the output-side engaged portions 52 of the two engaging elements 5.
• the two engaging elements 5 move in a direction approaching the pressed surface 6, regardless of the rotational direction of the output member 4. More specifically, as shown in Figure 6, the output side engaging portion 38 rotates in the rotational direction of the output member 4 (clockwise in the example of Figure 6) inside the output side engaged portions 52 of the two engaging elements 5.
• the output side engaged portions 52 are pressed radially outward by the connection (corner) between the flat surface 42 and the convex curved surface 43 on the outer circumferential surface of the output side engaging portion 38, and the two engaging elements 5 move in a direction approaching the pressed surface 6.
• the two engaging elements 5 move radially outward, away from each other, and the pressing surfaces 50 of the two engaging elements 5 come into contact with the pressed surface 6 and frictionally engage with the pressed surface 6.
• the engaging element 5 is stretched (clamped) between the output side engaging portion 38 and the movable element 8 so that the pressing surface 50 of the engaging element 5 does not slide (rotate relative to) against the pressed surface 6, thereby locking the output member 4.
• the input-side engagement portion 31 does not prevent the engagement element 5 from moving radially outward. Furthermore, even after the pressing surface 50 comes into contact with the pressed surface 6, the surface pressure acting on the contact point between the pressing surface 50 and the pressed surface 6 changes depending on the magnitude of the rotational torque input in reverse to the output member 4, ensuring that the output member 4 is locked or semi-locked appropriately.
• the reverse input disconnect clutch 1 of this example can switch between an unlocked state in which rotational torque can be transmitted from the input member 3 to the output member 4, and a locked state in which rotation of the output member 4 is prevented or a semi-locked state in which rotation of the output member 4 is suppressed, based on the radial movement of the engaging element 5 controlled by the rotation of the input member 3 and/or output member 4, thereby shortening the axial dimension of the entire reverse input disconnect clutch 1 device.
• the engaging element 5 has both the function of transmitting the rotational torque input to the input member 3 to the output member 4 and the function of locking or semi-locking the output member 4. This reduces the number of parts in the reverse input cutoff clutch 1 and ensures more stable operation than when the function of transmitting rotational torque and the function of locking or semi-locking are each provided in separate components.
• the engaging element 5 has both the function of transmitting rotational torque to the output member 4 and the function of locking or semi-locking the output member 4, thereby preventing such inconveniences from occurring.
• the movement direction of the engaging element 5 can be controlled by regulating the magnitude relationship between the two forces. This allows the output member 4 to be switched between a locked state or semi-locked state and an unlocked state in a stable and reliable manner.
• the coupling member 9 is disengaged from at least one of the fixed element 7 and the movable element 8.
• a tool or the like is used to pull the coupling member 9 out of the fixed-side engaging portion 10 and the movable-side engaging portion 19. This disengages the coupling member 9 from both the fixed element 7 and the movable element 8, allowing relative rotation of the movable element 8 with respect to the fixed element 7. In other words, torque transmission between the movable element 8 and the fixed element 7 becomes impossible.
• the reverse input cutoff function can be disabled by disengaging the coupling member 9 from at least one of the fixed element 7 and the movable element 8. Therefore, even if, for example, a malfunction occurs in the input-side mechanism, such as a drive source connected to the input member 3, making it impossible to input torque from the input member 3 to the reverse input cutoff clutch 1 and making it impossible to change the position or posture of the driven member connected to the output member 4, the reverse input cutoff function can be disabled to enable torque transmission from the output member 4 to the input member 3. In other words, by allowing the output member 4 to rotate due to the input of torque from the output member 4, the position and posture of the driven member can be changed by applying an external force to the driven member, thereby ensuring safety.
• rotational torque is input to the input member 3 with the reverse input blocking function disabled, the rotational torque is basically transmitted to the output member 4 in the same way as when the reverse input blocking function is enabled.
• the two engaging elements 5 move in a direction away from the pressed surface 6, regardless of the rotational direction of the input member 3.
• the radially inner surface 34 or curved surface 37 of the input-side engaging portion 31 comes into contact with the radially inner surface 53 of the input-side engaged portion 51, and the radially inner surface 53 of the input-side engaged portion 51 is pressed radially inward by the radially inner surface 34 or curved surface 37 of the input-side engaging portion 31, causing the engaging elements 5 to move in a direction away from the pressed surface 6.
• the output-side engaging portion 38 of the output member 4 is clamped from both radial sides by the output-side engaged portions 52 of the two engaging elements 5.
• the coupling member 9 is again placed between the fixed element 7 and the movable element 8.
• the circumferential phases of the fixed side engaging portion 10 and the movable side engaging portion 19 are aligned, and the coupling member 9 is inserted between the fixed side engaging portion 10 and the movable side engaging portion 19. This prevents the movable element 8 from rotating relative to the fixed element 7.
• the structure of the pressed member 2a differs from the structure of the pressed member 2 in the first example.
• the shape of the fixed-side engaging portion 10a provided on the fixed element 7a and the shape of the movable-side engaging portion 19a provided on the movable element 8a differs from the shapes of the fixed-side engaging portion 10 and the movable-side engaging portion 19 in the first example.
• the fixed-side engaging portion 10a is formed to be in a twisted position with respect to the central axis O7 of the fixed element 7a and is composed of two holes 17a, 17b having circular cross-sectional shapes that are arranged coaxially with each other.
• the fixed-side engaging portion 10a of this example does not have the groove portion 18 that was provided in the fixed-side engaging portion 10 of the first example.
• the movable-side engaging portion 19a is formed so as to be at a twisted position with respect to the central axis O8 of the movable element 8a, and is configured as a movable-side engaging hole having a circular cross-sectional shape.
• the movable-side engaging portion 19a has an inner diameter approximately the same as the inner diameter of the holes 17a and 17b that constitute the fixed-side engaging portion 10a.
• the coupling member 9 is engaged with the fixed-side coupling portion 10a and the movable-side coupling portion 19a in a state in which the central axis O10 of the fixed-side coupling portion 10a and the central axis O19 of the movable-side coupling portion 19a are aligned. Specifically, both ends in the extension direction of the coupling member 9 are engaged with the holes 17a, 17b, and the intermediate portion in the extension direction of the coupling member 9 is engaged with the movable-side coupling portion 19a.
• the structure of the pressed member 2b differs from the structure of the pressed member 2 in the first example.
• the shape of the connecting member 9a and the shape of the fixed-side engaging portion 10b provided on the fixed element 7b differ from the shapes of the connecting member 9 and the fixed-side engaging portion 10 in the first example.
• the connecting member 9a is composed of a bolt having a male thread portion 63 on its outer surface.
• the connecting member 9a has a head portion 64 and a shaft portion 65.
• the head 64 has a shape that allows a tool to be engaged when tightening or loosening the bolt-shaped connecting member 9a into the threaded hole.
• the head 64 has a non-circular hole for inserting a tool such as a hex wrench.
• the outer shape of the head can also be non-circular so that it can be engaged with a wrench.
• the shaft portion 65 has a large diameter portion 66 on the base end side (left side in Figure 9) and a small diameter portion 67 on the tip end side (right side in Figure 9).
• the male thread portion 63 is provided on the outer peripheral surface of the small diameter portion 67.
• One of the two hole portions 17c, 17d is a stepped circular hole.
• the inner surface of one hole portion 17c has a large-diameter cylindrical surface portion 68 on the side (left side in Figure 9) that opens to the outer peripheral surface of the fixing element 7b (thick-walled portion 16), a small-diameter cylindrical surface portion 69 on the side (right side in Figure 9) that opens to the inner peripheral surface (small-diameter cylindrical surface portion 12) of the fixing element 7b, and a stepped surface 70 connecting the large-diameter cylindrical surface portion 68 and the small-diameter cylindrical surface portion 69.
• the other of the two holes 17c, 17d (the hole 17d on the right side in Figure 9) is a threaded hole with a female thread on its inner surface that screws into the male thread 63 of the connecting member 9a.
• the groove portion 18 has an arc-shaped cross section.
• the male threaded portion 63 provided on the outer peripheral surface of the small diameter portion 67 of the coupling member 9a is threaded into the female threaded portion provided on the inner peripheral surface of the other hole portion 17d of the fixed side engagement portion 10b, the base end of the large diameter portion 66 is inserted into the small diameter cylindrical surface portion 69 of one of the holes 17c, and the tip end portion of the large diameter portion 66 is positioned without any play between the groove portion 18 and the movable side engagement portion 19.
• the seating surface of the head portion 64 abuts against the stepped surface 70 of one of the holes 17c. This positions the coupling member 9a.
• a tool or the like is used to loosen the male thread portion 63 on the outer peripheral surface of the small diameter portion 67 of the coupling member 9a and the female thread portion on the inner peripheral surface of the other hole portion 17d of the fixed side engagement portion 10b. Furthermore, the coupling member 9a is pulled out from the fixed side engagement portion 10b and the movable side engagement portion 19.
• the coupling member 9a is composed of two coupling members 9a. Therefore, the movable element 8b is provided with at least two movable side engaging portions 19b.
• the movable side engaging portions 19b can be formed at two circumferential locations on the outer peripheral surface of the movable element 8b.
• the movable side engaging portions 19b can be formed at three or more circumferential locations on the outer peripheral surface of the movable element 8b, and the coupling members 9b can be engaged with two of these movable side engaging portions 19b.
• the movable element 8b is provided with six movable-side engaging portions 19b. Therefore, the movable element 8b has a rectangular cylindrical surface portion 78, which has an external shape that is approximately a regular hexagon when viewed from the axial direction, on the outer peripheral surface of the other axial end portion. Of the six movable-side engaging portions 19b, two movable-side engaging portions 19b located on diametrically opposite sides engage with the intermediate portion of the connecting member 9a in the extension direction. In other words, the outer peripheral surface of the tip end portion of the large-diameter portion 66 of the shaft portion 65 faces each movable-side engaging portion 19b.
• the movable element 8b has six movable-side engaging portions 19b, two of which are adapted to engage with the connecting member 9a. This makes it easier to align the circumferential phase of the fixed-side engaging portions 10b and the movable-side engaging portions 19b compared to the structure of the second example.
• the shape of the connecting member 9b and the shape of the fixed-side engaging portion 10c provided on the fixed element 7c have been changed from the shape of the connecting member 9a and the shape of the fixed-side engaging portion 10b of the fourth example.
• the pressed member 2d has both ends of the connecting member 9b in the extension direction press-fitted or lightly press-fitted into the hole of the fixed-side engaging portion 10c, and the middle portion of the connecting member 9b in the extension direction is positioned without any play between the groove of the fixed-side engaging portion 10c and the movable-side engaging portion 19b.
• the connecting member 9c spans the radial direction between the fixed element 7d and the movable element 8c. Accordingly, the formation direction and shape of the fixed-side engaging portion 10d provided on the fixed element 7d, and the formation direction and shape of the movable-side engaging portion 19c provided on the movable element 8c have been changed.
• the connecting member 9c is composed of two connecting members 9c.
• Each connecting member 9c is composed of a bolt with a male thread portion 63a on its outer surface.
• Each connecting member 9c has a head portion 64a and a shaft portion 65a.
• the shaft portion 65a has a large diameter portion 66a at the base end and a small diameter portion 67a at the tip end.
• the male thread portion 63a is provided on the outer peripheral surface of the small diameter portion 67a.
• the fixed side engaging portion 10d is configured as a fixed side engaging hole that penetrates the fixed element 7d radially and has a stepped cylindrical inner surface.
• the fixed side engaging portion 10d penetrates the thick-walled portion 16a of the fixed element 7d radially.
• the inner surface of the fixed side engaging portion 10d has a large diameter cylindrical surface portion 72 that opens to the outer peripheral surface of the fixed element 7d, a small diameter cylindrical surface portion 73 that opens to the outer peripheral surface of the fixed element 7d, and a stepped surface 74 that connects the large diameter cylindrical surface portion 72 and the small diameter cylindrical surface portion 73 and faces radially outward.
• the fixed side engaging portion 10d is configured as two fixed side engaging portions 10d, matching the number of connecting members 9c.
• the two fixed side engaging portions 10d are located at two radially opposite locations on the thick portion 16a.
• the movable-side engaging portion 19c is configured as a stepped hole that opens to the outer peripheral surface of the movable element 8c and has a circular cross-sectional shape.
• the movable-side engaging portion 19c has a large-diameter portion 79 on the radially outer side and a small-diameter portion 80 on the radially inner side.
• the large-diameter portion 79 opens to the small-diameter cylindrical surface portion 24.
• the small diameter portion 80 has an internal thread portion on its inner peripheral surface that screws into the external thread portion 63a of the coupling member 9c.
• the movable side engaging portion 19c is composed of two movable side engaging portions 19c, matching the number of connecting members 9c.
• the two movable side engaging portions 19c are formed so that they open at two locations on opposite radial sides of the small diameter cylindrical surface portion 24.
• the male threaded portion 63a provided on the outer peripheral surface of the small diameter portion 67a of each coupling member 9c is threaded into the female threaded portion provided on the small diameter portion 80 of the movable side engagement portion 19c, and the large diameter portion 68a is inserted into the large diameter portion 79 of the movable side engagement portion 19c and the small diameter cylindrical surface portion 73 of the fixed side engagement portion 10d.
• the seating surface of the head 64a abuts against the stepped surface 74. This positions the coupling member 9c.
• the connecting member 9d is suspended between the fixed element 7e and the movable element 8d in a direction parallel to the axial direction. Accordingly, the formation direction and shape of the fixed-side engaging portion 10e provided on the fixed element 7e, and the formation direction and shape of the movable-side engaging portion 19d provided on the movable element 8d have been changed.
• the connecting member 9d is made up of four connecting members 9d.
• Each connecting member 9d is composed of a bolt with a male thread portion 63b on its outer surface.
• Each connecting member 9d has a head portion 64b and a shaft portion 65b.
• the shaft portion 65b has a large diameter portion 66b at the base end and a small diameter portion 67b at the tip end.
• the male thread portion 63b is provided on the outer peripheral surface of the small diameter portion 67b.
• the fixed side engagement portion 10e is composed of a fixed side engagement hole that penetrates the fixed element 7e in the axial direction and has a circular cross-sectional shape.
• the fixed side engagement portion 10e is formed on a fixed flange portion 75 that protrudes radially inward from the other axial end of the inner circumferential surface of the thick portion 16a of the fixed element 7e.
• the fixed side engaging portions 10e are configured as four, matching the number of connecting members 9d.
• the four fixed side engaging portions 10e are formed so as to axially penetrate the fixed flange portion 75 at four equally spaced locations in the circumferential direction.
• the movable-side engagement portion 19d is configured as a movable-side engagement hole that opens into the end face on the other axial side of the movable element 8d.
• the movable-side engagement portion 19d is configured as a stepped, bottomed hole having a large-diameter portion 76 on the other axial side and a small-diameter portion 77 on one axial side.
• the small-diameter portion 77 has a female thread portion on its inner surface that threads into the male thread portion 63b of the coupling member 9d.
• the movable-side engaging portions 19d are composed of four movable-side engaging portions 19d, matching the number of connecting members 9d.
• the four movable-side engaging portions 19d are formed so as to open at four equally spaced locations circumferentially on the end face on the other axial side of the movable element 8d.
• the male threaded portion 63b provided on the outer peripheral surface of the small diameter portion 67b of each coupling member 9d is threaded into the female threaded portion provided on the inner peripheral surface of the small diameter portion 77 of the movable side engagement portion 19d, and the large diameter portion 68b is inserted through the fixed side engagement portion 10e and the small diameter portion 77 of the movable side engagement portion 19d.
• the seating surface of the head 64b abuts against the side surface on the other axial side of the fixed flange portion 75. This positions the coupling member 9d.
• the first through seventh examples of the present disclosure may be combined as appropriate, provided no contradictions arise.
• the scope of the present disclosure encompasses improvements and modifications that can be made by a person skilled in the art based on the contents of the present disclosure, as long as the differential rotation of the movable element relative to the fixed element can be switched between permitted and prevented by engaging and disengaging the coupling member.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=96699670

Family Applications (1)

Country Status (2)

Citations (1)

• 2024
  • 2024-12-02 WO PCT/JP2024/042528 patent/WO2025169580A1/ja active Pending
  • 2024-12-02 JP JP2025523613A patent/JP7726431B1/ja active Active

Patent Citations (1)

Also Published As

Similar Documents

Legal Events