JP2021139434A - Lock type bidirectional clutch - Google Patents

Abstract

To provide a lock type bidirectional clutch capable of preventing occurrence of noise due to operation, and reliably holding a lock state upon stopping an output shaft.SOLUTION: Into eccentric rings 14 provided on an input members 4, 104, an actuator 26, which is allowed to revolve around a common rotational axis but is regulated from auto-rotating, is fitted, and a working external gear 28 formed on the actuator 26 meshes with an output internal gear 24 formed on an output member 6.SELECTED DRAWING: Figure 1

Description

The present invention is a clutch device that changes the power transmission state between the input member and the output member, particularly, the forward / reverse rotation power from the input member (drive side) is transmitted, and the power is transmitted from the output member (driven side). The power transmission is related to a lock type bidirectional clutch that shuts off the output member as non-rotatable.

In a power transmission system that drives work equipment or the like from a drive source such as a motor, for example, an elevating device that moves an article up and down by a motor, when the article is in a predetermined position, the article is automatically moved when the motor is stopped. An operation that holds the position may be required. Therefore, using a lock-type bidirectional clutch equipped with an input shaft (input member) and an output shaft (output member), the input shaft is connected to a motor that can rotate forward and reverse, and the article is rotated by the rotation of the output shaft. Devices for raising and lowering are known. In the bidirectional clutch of this device, when the input shaft is rotated forward / reverse by the motor, the output shaft is linked to rotate forward / reverse to move the article up and down, while when the output shaft is rotated forward / reverse, the output is output. The shaft is locked to prevent the article from falling.

An outline of the lifting device using the lock type bidirectional clutch and an example of the structure of the bidirectional clutch will be described with reference to FIGS. 15 and 16. FIG. 15 shows an AA cross-sectional structure of a bidirectional clutch provided in a lifting device for raising and lowering an article by a belt and a pulley, and FIG. 16A shows an output shaft as an input shaft. The AA cross section in a state where the article is moved up and down in conjunction with each other, and (b) shows the AA cross section in a state where the output shaft is locked to prevent the article from falling.
The elevating device of FIG. 15 is a device in which a belt B is hung between pulleys P1 and P2 arranged vertically and an article W to be transferred to the belt B is fixed, and the upper pulley P1 is rotationally driven. A motor M capable of rotating forward and reverse is connected via a bidirectional clutch DC. The bidirectional clutch DC has an input shaft IS connected to the motor M, an output shaft OS connected to the pulley P1, and a fixed housing HG.

As shown in the AA cross-sectional view, in the housing HG of the bidirectional clutch DC, the input shaft IS is divided into a plurality of fan-shaped portions, and the output shaft OS is fitted inside the fan-shaped portions. The output shaft OS is provided with a protrusion that enters between the fan-shaped portions adjacent to the input shaft IS, and a roller R is provided between the V-shaped recess formed at the tip of the protrusion and the housing HG. Intervened.

As shown in FIG. 16A, when the input shaft IS is rotated by the motor M, the side surface of the fan-shaped portion of the input shaft IS and the side surface of the protrusion of the output shaft OS are in contact with each other, and the output shaft OS is input. It rotates in the same direction and at the same speed while being pushed by the axis IS. The same applies when the input shaft IS rotates in the opposite direction. In the lifting device of FIG. 15, when the motor M is rotated forward and reverse, the article W fixed to the belt B can be raised or lowered.
On the other hand, when the output shaft OS rotates, as shown in (b), the roller R is pushed up by the slope of the V-shaped recess and moves outward, and the protrusions of the housing HG and the output shaft OS It is sandwiched between the parts. As a result, the output shaft OS is locked and stops at that position, and the rotation is not transmitted to the input shaft IS. That is, in the lifting device of FIG. 15, even if the drive by the motor M is stopped, the article W can be automatically prevented from falling due to its own weight. Such a lock-type bidirectional clutch is disclosed in Japanese Patent No. 4805653 according to the inventor of the present applicant.

The lock-type bidirectional clutch can be applied to, for example, an elevating device for transferring a paper table on which paper is placed, or an elevating device for elevating and lowering a window blind of a building in a finisher of a copier. By using this, it becomes possible to automatically control the power transmission by a simple device, and it becomes unnecessary to use electric power or the like as in the case of controlling by an electromagnetic clutch, and from the output shaft side. It is also possible to protect the motor of the drive source in the event of an unexpected reverse input.

Japanese Patent No. 4805653

In the lock type bidirectional clutch shown in Patent Document 1, in order to achieve the function, it is necessary to provide a gap between the fan-shaped portion of the input shaft IS and the protrusion of the output shaft OS, and it is necessary to provide a gap during operation. An impact sound is generated. Further, when the bidirectional clutch is applied to the elevating device of FIG. 15, there is no problem when the motor M is rotated forward to raise the article W, but when the motor M is reversed and the article W is lowered, the article W Due to gravity, the speed of the output shaft OS may repeatedly fluctuate finely, causing vibration and abnormal noise. This is due to the following reasons.
When the motor M is rotated in the reverse direction to lower the article W, the output shaft OS may rotate (overrun) faster than the input shaft IS due to the gravity acting on the article W. In the state shown in FIG. 16B, the roller R and the housing HG mesh with each other, and the output shaft OS is locked. This locked state is released when the roller R is pushed by the rotation of the input shaft IS, but repeated biting and releasing causes fine fluctuations in the speed of the output shaft OS. In order to release the locked state, it is necessary to apply a torque (moment) that overcomes the frictional force acting on the roller, but this point is the same when raising the article W in the stopped state, and the motor M Is required to have a torque for releasing the bite in addition to a load torque for raising the article W.

Further, in the lock type bidirectional clutch of FIG. 15, the rotation speed of the output shaft OS is always equal to the rotation speed of the input shaft IS, and the rotation direction of the output shaft OS is also equal to the rotation direction of the input shaft IS. With the bidirectional clutch itself, it is not possible to shift gears to change the rotation direction or speed, so it is not possible to increase or decrease the torque between the input / output shafts, and when the load torque acting on the output shaft OS is large. , It is necessary to prepare a large motor that generates torque commensurate with it as a drive source.

The present invention has been made in view of the above facts, and its main technical problem is to prevent the generation of abnormal noise and the like due to operation, and to reliably maintain the locked state when the output shaft is stopped. It is to provide a new and improved lock type bidirectional clutch that can be used.

In view of the above problems, as a result of diligent studies, the present inventors are allowed to revolve around a common rotation axis on the eccentric ring provided on the input member, but are restricted from rotating. It has been found that the above-mentioned main technical problem can be solved by fitting the actuator so that the working external gear formed on the actuator meshes with the output internal gear formed on the output member.

That is, according to the present invention, as a lock type bidirectional clutch that solves the above-mentioned main technical problem, an input member and an output member that can rotate around a common rotation axis are provided, and the forward and reverse directions from the input member are provided. The rotation of the output member is transmitted to the output member, and the rotation transmission from the output member to the input member is a lock type bidirectional clutch in which the output member becomes non-rotatable and is cut off.
The input member is provided with a cylindrical eccentric ring, and the output member is provided with an output internal gear.
The eccentric ring is fitted with an actuator that is allowed to revolve around the common axis of rotation but is restricted from rotating.
Provided is a lock type bidirectional clutch characterized in that the actuator includes an operating external gear that meshes with the output internal gear.

Preferably, a fixed external gear concentric with the common rotating shaft is provided, and the actuator fits inside the eccentric ring and meshes with the fixed external gear and has a common center with the operating external gear. The working internal gear having a shaft is provided, and the number of teeth of the working internal gear is the same as the number of teeth of the fixed external gear. In this case, the tooth profile of the fixed external gear has a concave arc shape, the tooth profile of the working internal gear has a convex arc shape, and the curvature of the tooth profile of the fixed external gear has a convex arc shape. Should be smaller than the curvature of the tooth profile of the working internal gear. A plurality of engaging holes having a circular cross section are provided on a virtual circumference centered on the common rotation axis at intervals, and the actuator has a cylindrical shape that fits inside the eccentric ring. The connecting member provided with the fitting wall of the above and the operating member provided with the operating external gear are provided, and the connecting member and the operating member are locked by a locking means and can revolve integrally. A plurality of engaging pins to be inserted into each of the plurality of engaging holes formed in the fixing plate are erected on the operating member, and the plurality of engaging pins are integrally inserted into each of the plurality of engaging pins. It can also be made movable along the inner peripheral surface of the engaging hole. In this case, the input member includes a cylindrical support wall concentric with the common rotating shaft inside the eccentric ring, and the fitting wall of the connecting member is the eccentric ring and the support wall. It is better to fit between and. A plurality of fixing plates having circular cross-sections formed at intervals on a virtual circumference centered on the common rotation axis are provided, and the actuator has a cylindrical shape that is fitted to the outside of the eccentric ring. The outer fitting wall is provided, and a plurality of engaging pins to be inserted into the plurality of engaging holes formed in the fixing plate are erected on the tip surface of the outer fitting wall. The engaging pins of the above can also be made movable along the inner peripheral surface of each of the engaging holes inserted together. In this case, the actuator may preferably include a cylindrical inner fitting wall that fits inside the eccentric ring. Preferably, the number of teeth of the working external gear is one less than the number of teeth of the output internal gear. Preferably, both the output internal gear and the working external gear have a trochoidal tooth profile.

In the lock type bidirectional clutch of the present invention, an actuator that is allowed to revolve around a common rotation axis but is restricted from rotating is fitted into an eccentric wheel provided on an input member. The working external gear formed on the actuator meshes with the output internal gear formed on the output member. As a result, the rotation from the input member to the output member is transmitted to the output member by shifting by the internal gear mechanism after the rotation motion of the input member is once converted into a revolution motion by the actuator. On the other hand, the rotation from the output member is not transmitted to the input member because the output member is locked because the rotation of the actuator is restricted.

Therefore, in the lock type bidirectional clutch of the present invention, the rotation transmission from the output member is blocked by locking the internal gear mechanism without using frictional force, so that the output member is kept stopped. Is not limited by the frictional force. Further, since the locked state of the internal gear mechanism occurs immediately when trying to drive from the output member side, unlike the bidirectional clutch of FIG. 15, no impact noise is generated during operation. Further, the speed fluctuation of the output member due to the repeated biting and releasing of the roller does not occur, and it is not necessary to apply an extra torque for releasing the biting of the roller.

The figure which shows the whole structure of the 1st Embodiment of the lock type bidirectional clutch configured according to this invention. The figure which shows the input member of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the output member of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the actuator of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the housing of the lock type bidirectional clutch shown in FIG. 1 alone. The figure for demonstrating the operation when the lock type bidirectional clutch shown in FIG. 1 is rotated from the input member side. The figure for demonstrating the operation when the lock type bidirectional clutch shown in FIG. 1 was tried to rotate from the output member side. The figure which shows the whole structure of the 2nd Embodiment of the lock type bidirectional clutch configured according to this invention. The figure which shows the input member of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the output member of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the actuator of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the housing of the lock type bidirectional clutch shown in FIG. 8 alone. It is a figure for demonstrating operation when the lock type bidirectional clutch shown in FIG. 8 is rotated from an input member side. The figure which shows the modification of the lock type bidirectional clutch shown in FIG. The figure which shows an example of the conventional lock type bidirectional clutch. The figure explaining the operation of the lock type bidirectional clutch of FIG.

Hereinafter, preferred embodiments of the lock type bidirectional clutch configured according to the present invention will be described in more detail with reference to the accompanying drawings.

First, the first embodiment of the lock type bidirectional clutch configured according to the present invention will be described with reference to FIGS. 1 to 7. As shown in FIG. 1, the lock type bidirectional clutch of the present embodiment, which is indicated by the number 2 as a whole, includes an input member 4 and an output member 6 that can rotate around a common rotation axis o.

Explaining with reference to FIG. 2 together with FIG. 1, the input member 4 is made of metal and includes an input shaft portion 8 concentric with the rotation shaft o. The input shaft portion 8 has a cylindrical shape as a whole, and faces the outer peripheral surface of one end portion in the axial direction (the right end portion in the central vertical cross section of FIG. 1 and the AA cross section of FIG. 2) in the radial direction. A pair of notches 10 are formed. The input shaft portion 8 is connected to a drive source (not shown) such as a motor via a pair of notches 10. A circular input flange 12 is connected to the other end (left end) of the input shaft portion 8 in the axial direction. The center of the input flange 12 is eccentric by e with respect to the rotation axis (common rotation axis o) of the input shaft portion 8. A cylindrical eccentric ring 14 extending toward the other side in the axial direction is provided on the outer peripheral edge of the input flange 12. An annular groove 16 extending continuously in the circumferential direction is formed at the other end of the inner peripheral surface of the eccentric ring 14 in the axial direction. A well-known bearing is arranged in the groove 16 as described later.

Explaining with reference to FIG. 3 together with FIG. 1, the output member 6 is arranged adjacent to the input member 4 in the axial direction. The output member 6 is made of metal and includes an output shaft portion 18 concentric with the rotating shaft o. The output shaft portion 18 has a cylindrical shape as a whole, and faces the outer peripheral surface of the other end portion in the axial direction (the left end portion in the central vertical cross section of FIG. 1 and the AA cross section of FIG. 3) in the radial direction. A pair of notches 20 are formed. The output shaft portion 18 is connected to a driven member (not shown) such as an elevating device via a pair of notches 20. A circular output flange 22 is connected to one end (right end) of the output shaft portion 18 in the axial direction. The center of the output flange 22 is concentric with the common rotation axis o. An output internal gear 24 is provided on the outer peripheral edge of the output flange 22. Therefore, the output internal gear 24 is concentric with the common rotating shaft o. In the illustrated embodiment, the teeth of the output internal gear 24 have a trochoidal tooth profile, and the number of teeth is six.

As shown in FIG. 1, the actuator 26 is fitted inside the eccentric ring 14 of the input member 4 so as to be relatively rotatable. Explaining with reference to FIG. 1 and FIG. 4, the actuator 26 is made of metal, and has an working external gear 28 that meshes with the output internal gear and a fixed external gear that fits inside the eccentric ring 14 and will be described later. It has an operating internal gear 30 that meshes with. In the illustrated embodiment, the working internal gear 30 is fitted inside the eccentric ring 14 via a well-known bearing 31. The actuator 26 includes a partition wall 32 for partitioning the working external gear 28 and the working internal gear 30, and the operating external gear 28 is provided on one side surface of the partition wall 32 (center vertical cross section in FIG. 1 and A in FIG. 4). The working internal gear 30 is provided on the other side surface (the left side surface of the same) on the right side surface in the −A cross section. As a result, the working external gear 28 and the working internal gear 30 are adjacent to each other in the axial direction and are integrated and have a common central axis o'. The actuator 26 is also formed with a through hole having a circular cross section that penetrates concentrically with the central axis o'in the axial direction, through which the output shaft portion 18 is inserted. As shown in FIG. 1, the common central axis o'of the working external gear 28 and the working internal gear 30 is located eccentrically with respect to the common rotating shaft o. In the illustrated embodiment, the teeth of the working external gear 28 have a trochoidal tooth profile, and the number of teeth is five. Further, the tooth tip surface of the tooth profile of the working internal gear 30 has a convex arc shape, and the number of teeth is nine.

As shown in FIG. 1, the lock type bidirectional clutch 2 of the present embodiment includes a fixed external gear 34 concentric with the common rotating shaft o. The fixed external gear 34 is provided entirely in a fixed housing designated by number 36. In FIG. 1, the housing 36 and the shield plate described later are not hatched for easy understanding. Explaining the housing 36 with reference to FIG. 1 and FIG. 5A, the housing 36 is made of metal and has a substantially square end plate 38 and a tubular shape extending axially from the outer peripheral edge of the end plate 38. An outer peripheral wall 40 is provided, and an eccentric ring 14 of the input member 4, an output internal gear 24, and an accommodating space 42 having a circular cross section are provided inside the outer peripheral wall 40. .. A circular central through hole 44 through which the output shaft portion 18 of the output member 6 is inserted and rotatably supports the output shaft portion 18 of the output member 6 is formed in the center of the end plate 38. The fixed external gear 34 is provided at the center of the end plate 38 and inside the outer peripheral wall 40 (that is, inside the accommodation space 42), and as shown in the BB cross section of FIG. 1, the working internal gear 30 Engage with. The tooth profile of the fixed external gear 34 has a concave arc shape, and the curvature of the tooth profile of the fixed external gear 34 is smaller than the curvature of the tooth profile of the working internal gear 30. The number of teeth of the fixed external gear 34 is 9, which is the same as the number of teeth of the working internal gear 30. At the center of the fixed external gear 34, a recess 46 having a circular cross section is formed so as to communicate with the central through hole 44 and open in the accommodation space 42. A well-known bearing 48 that rotatably supports the output shaft portion 18 is arranged in the recess 46. An outer through hole 50 that penetrates in the axial direction is also formed at each corner of the outer peripheral wall 40. A bolt used for fixing a shield plate, which will be described later, is inserted into the outer through hole 50.

The open end of the outer wall 40 is closed by the shield plate 52 shown in FIG. 5 (b). The shield plate 52 is made of metal and has a substantially square shape corresponding to the end plate 38 of the housing 36. A circular central through hole 54 through which the input shaft portion 8 of the input member 4 is inserted and rotatably supports the input shaft portion 8 of the input member 4 is formed in the center of the shield plate 52. Further, a recess 56 having a circular cross section is formed in the center of the shield plate 52 so as to communicate with the central through hole 54 and open on the side opposite to the central through hole 54 in the axial direction. The recess 56 is concentric with the central through hole 54, and the recess 56 is provided with a well-known bearing 58 that rotatably supports the input shaft portion 8. Outer through holes 60 penetrating in the axial direction are formed at the corners of the shield plate 52, respectively. The housing 36 and the shield plate 52 are fastened by inserting bolts (not shown) into the outer through holes 50 and 60 and fastening them with nuts.

Subsequently, the operation of the lock type bidirectional clutch 2 of the present embodiment will be described with reference to FIGS. 6 and 7. As shown by the arrows in FIG. 6, when the input member 4 is rotated clockwise (when viewed from the right side of the central vertical sectional view) by the motor of the drive source, the eccentric ring 14 of the input member 4 has a common rotation axis o. Rotates eccentrically around. That is, the entire eccentric ring 14 rotates clockwise while moving (revolving) clockwise along a circle having a radius e around a rotation axis o whose center is common. Then, the working internal gear 30 fitted inside the eccentric ring 14 revolves around a common rotation axis o without rotating, as shown by an arrow in the BB cross section. This is because, in the lock type bidirectional clutch 2 of the present embodiment, the working internal gear 30 is eccentrically meshed with the fixed external gear 34, and the number of teeth of both gears is the same. .. That is, since there is no difference in the number of teeth with the fixed external gear 34, even if the operating internal gear 30 revolves, the operating internal gear 30 rotates with respect to the fixed external gear 34 (rotational movement). ) Is impossible. That is, the working internal gear 30 (actor 26) is allowed to revolve around a common rotating shaft o, but is restricted from rotating. When the working internal gear 30 revolves around a common rotating shaft o, the outer peripheral surfaces of the respective teeth slide with respect to the outer peripheral surfaces of the teeth of the fixed external gear 34.

ｎａ：出力内歯歯車の自転角速度
ｎｂ：作動外歯歯車の自転角速度
ｎｃ：作動外歯歯車の公転角速度
ａ：出力内歯歯車の歯数
ｂ：作動外歯歯車の歯数
の関係があることから、出力内歯歯車２４（出力部材６）の自転角速度は以下のように算出される。図示の実施形態にあっては、出力内歯歯車２４の歯数ａは６であって、作動外歯歯車２８の歯数ｂは５であって自転角速度ｎｂは０であることから、偏心輪１４が時計方向に１回転、つまり作動外歯歯車２８が時計方向に１だけ公転すると（ｎｃ＝１）、出力内歯歯車２４は１／６だけ自転する（ｎａ）こととなる。 Therefore, the rotation motion of the input member 4 is once converted into the revolution motion of the actuator 26. At this time, rotation is transmitted from the input member 4 to the working internal gear 30 (activator 26) at a constant speed without shifting. Since the working internal gear 30 and the working external gear 28 are integrated and have a common central axis o', the working external gear 28 also revolves in the same manner as the working internal gear 30, thereby operating. The output internal gear 24 that meshes with the external gear 28 is rotated. Here, in the internal gear mechanism as shown in the AA cross section,

na: Rotation angular velocity of the output internal gear
nb: Rotation angular velocity of the working external gear
nc: Revolution angular velocity of working external gear
a: Number of teeth of the output internal gear
b: Since there is a relationship between the number of teeth of the working external gear, the rotation angular velocity of the output internal gear 24 (output member 6) is calculated as follows. In the illustrated embodiment, the number of teeth a of the output internal gear 24 is 6, the number b of the working external gear 28 is 5, and the rotation angular velocity nb is 0. When 14 makes one rotation in the clockwise direction, that is, when the working external gear 28 revolves by 1 in the clockwise direction (nc = 1), the output internal gear 24 rotates by 1/6 (na).

On the other hand, as shown by each broken line arrow in FIG. 7, when the output member 6 is to be rotated, the working external gear 28 that meshes eccentrically with the output internal gear 24 will rotate around the central axis o'. However, as described above, the working internal gear 30 integrated with the working external gear 28 is restricted from rotating, whereby the actuator 26 cannot rotate, and therefore the output member 6 is locked. That is, the transmission of rotation from the output member 6 to the input member 4 is blocked because the output member 6 cannot rotate.

Next, a second embodiment of the lock type bidirectional clutch configured according to the present invention will be described with reference to FIGS. 8 to 15. In the following description, the same configuration as that of the first embodiment will be indicated by adding 100 to the same number, and detailed description thereof will be omitted.

As shown in FIG. 8, the lock type bidirectional clutch of the present embodiment, which is indicated by the number 102 as a whole, includes an input member 104 and an output member 106 that can rotate about a common rotation axis o.

Explaining with reference to FIG. 9, the input member 104 includes an input shaft portion 108, an input flange 112, and an eccentric ring 114. However, the diameters of the input flange 112 and the eccentric ring 114 are smaller than those of the lock type bidirectional clutch 2 (input flange 12 and eccentric ring 14) shown in FIG. The input member 104 includes a cylindrical support wall 162 concentric with the common rotation shaft o inside the eccentric ring 114, and a fitting wall for a connecting member described later is formed between the eccentric ring 114 and the support wall 162. Fit in.

Explaining with reference to FIG. 10, the output member 106 includes an output shaft portion 118 and an output flange 122, and an output internal gear 124 is formed on the output flange 122. The number of teeth of the output internal gear 124 is nine.

Explaining with reference to FIG. 11, the actuator 126 is composed of a connecting member 164 and an operating member 166 arranged in series in the axial direction. The connecting member 164 includes a cylindrical fitting wall 168 that is rotatably fitted inside the eccentric ring 114. As shown in the central longitudinal section of FIG. 8, in the illustrated embodiment, the fitting wall 168 is fitted inside the eccentric ring 114 via a well-known bearing 131. In the present embodiment, the diameter of the bearing 131 can be made smaller than the diameter of the bearing 31 of the lock type bidirectional clutch 2 of FIG. 1, the manufacturing cost can be reduced, and the radial direction can be made compact. be able to. A disk-shaped connecting flange 170 is connected to the other end of the fitting wall 168 in the axial direction (the central longitudinal section of FIG. 8 and the left end in FIG. 11A). A circular through hole 172 is formed in the center of the connection flange 170, and inside the circular through hole 172, the end surface of the support wall 162 of the input member 104 is in contact with the output flange 122 of the output member 106 and is bearing by this. A cylindrical connecting wall 174 extending axially opposite to the fitting wall 168 is formed on the outer peripheral edge of the connecting flange 170. A plurality of locking grooves 176 extending linearly in the axial direction are formed on the inner peripheral surface of the connecting wall 174 at equal intervals in the circumferential direction. The actuating member 166 includes a circular actuating substrate 178 located inside the connecting wall 174. On the outer peripheral surface of the operating substrate 178, a plurality of locking ridges 180 that protrude outward in the radial direction and engage with the locking groove 176 formed inside the connecting wall 174 are formed corresponding to the locking groove 176. There is. From this, the operating member 166 is integrated with the connecting member 164 and has a common central axis o'by locking (locking means) between the locking groove 176 and the locking ridge 180. A circular through hole 181 is formed in the center of the operating board 178, through which the output shaft portion 118 is inserted. The working external gear 128 is formed in the center of one side surface of the working substrate 178 (the central longitudinal section of FIG. 8 and the right side in FIG. 11B), and has eight teeth. A plurality of engaging pins 182 are erected on the outer peripheral edge of the other side surface (the left side surface of the same) of the operating board 178 at equal intervals in the circumferential direction, and nine in the illustrated embodiment. These plurality of engaging pins 182 are provided corresponding to the number of a plurality of engaging holes formed in the fixing plate described later, and are inserted into each of them. In the illustrated embodiment, the cross-sectional shape of the engaging pin 182 is circular, but it may be polygonal if desired.

As shown in FIG. 8, in the lock type bidirectional clutch 102 of the present embodiment, a plurality of engagement holes 184 having a circular cross section are formed at intervals in the circumferential direction on a virtual circumference centered on a common rotation axis o. It is provided with a fixing plate 186. In the illustrated embodiment, the fixing plate 186 is substantially square and is entirely provided in the fixed housing designated by number 136. Explaining the housing 136 with reference to FIG. 8 (a), the fixing plate 186 is an end plate of the housing, and a tubular outer peripheral wall 140 extending in the axial direction is provided on the outer peripheral edge thereof. .. The fixing plate 186 is also formed with a central through hole 144 and a recess 146. Nine engagement holes 184 are formed, and all of them are open toward the accommodation space 142. The diameter of the engagement hole 184 is larger than the diameter of the engagement pin 182 formed on the actuating member 166 of the actuator 126, and each of the plurality of engagement holes 184 is formed on the actuating member 166 of the actuator 126. The engaging pins 182 of the above are inserted one by one. The open end of the outer wall 140 is closed by the shield plate 152 shown in FIG. 12 (b). The shield plate 152 includes a central through hole 154 and a recess 156.

Subsequently, with reference to FIG. 13, the operation when the input member 104 is rotated clockwise (when viewed from the right side of the central vertical cross section) in the lock type bidirectional clutch 102 of the present embodiment will be described. As shown by each arrow in FIG. 13, when the input member 104 rotates clockwise, the eccentric ring 114 has a radius around a rotation axis o whose center is common, similar to the lock type bidirectional clutch 2 in FIG. The whole rotates clockwise while moving (revolving) clockwise along the circle of e. Then, as shown by the arrows in the AA cross section, the fitting wall 168 of the connecting member 164, which is a part of the actuator 126 fitted inside the eccentric ring 114, revolves around the common rotation axis o without rotating. do. Explaining this, the connecting member 164 having the fitting wall 168 is integrally connected to the operating member 166, and the plurality of engaging pins 182 formed on the operating member 166 each have a plurality of engagements formed on the fixing plate 186. This is because the rotation of the actuator 126 is regulated because it is inserted into each of the joint holes 184. On the other hand, since the diameter of the engaging pin 182 is smaller than the diameter of the engaging hole 184, each of the plurality of engaging pins 182 can move in the engaging hole 184 inserted integrally. From this, when the input member 104 rotates clockwise, as shown in the CC cross section, the plurality of engaging pins 182 slide along the inner peripheral surfaces of the respective engaging holes 184 inserted integrally. It moves, that is, revolves, and the actuator 126 revolves around a common rotation axis o without rotating.

Therefore, the rotation motion of the input member 104 is once converted into the revolution motion of the actuator 126. At this time, rotation is transmitted from the input member 104 to the actuator 126 at a constant speed without shifting. Then, as in the lock type bidirectional clutch 2 of FIG. 1, the rotation of the actuator 126 that revolves at a constant speed with the rotation of the input member 104 causes the working external gear 128 and the output internal gear 124 formed therein to rotate. By meshing, the gear is changed and transmitted to the output member 106. At this time, according to the above equation, the rotation of the input member 104 is reduced to 1/9 and transmitted to the output member 106. In the lock type bidirectional clutch 102 of the present embodiment, since each of the plurality of engaging pins 182 comes into contact with each of the plurality of engaging holes 184, the entire actuator 126 is prevented from falling over, and the input member The rotation can be stably transmitted from the 104 to the output member 106.

Even in the lock type bidirectional clutch 102 of the present embodiment, the transmission of rotation from the output member 106 to the input member 104 is blocked by the output member 106, which is the reason for both the lock type shown in FIG. It is the same as that of the facing clutch 2.

FIG. 14 shows a modified example of the lock type bidirectional clutch 102 shown in FIG. In the following description, the same configuration as that of the lock type bidirectional clutch described above will be indicated by adding 200 to the same number, and detailed description thereof will be omitted.

In the lock-type bidirectional clutch of this modification, which is shown in its entirety by number 202, the actuator 226 includes a cylindrical outer fitting wall 268a that fits outside the eccentric ring 214. The outer fitting wall 268a is arranged on one side surface of the operating substrate 278 (the right side surface in the central longitudinal section of FIG. 14). In the illustrated embodiment, a cylindrical inner fitting wall 268b that fits inside the eccentric ring 214 is also provided on the same surface of the operating substrate 278. The inner fitting wall 268b is fitted inside the eccentric ring 214 via a well-known bearing 231. A plurality of engaging pins 282 to be inserted into each of the plurality of engaging holes 284 formed in the fixing plate 286 are erected on the tip surface of the outer fitting wall 268a, and the plurality of engaging pins 282 are erected. Is movable along the inner peripheral surface of each of the engaging holes 284 inserted together. In this modification, the working external gear 228 is provided on the other side surface (left side surface) of the working board 278, and the output internal gear 224 is on the surface of the output flange 222 opposite to the output shaft portion 218 (the surface opposite to the output shaft portion 218). It is provided on the right side). Since the operation of the lock type bidirectional clutch 202 is the same as that of the lock type bidirectional clutch 102 shown in FIG. 8, detailed description thereof will be omitted.

In the lock type bidirectional clutch 202 of this modification, the actuator 226 can be composed of a single member. Therefore, the structure is simpler than that of the lock type bidirectional clutch 102 shown in FIG. 8, and the manufacturing cost can be reduced. Further, in the lock type bidirectional clutch 202 of this modification, since the engaging hole 284 is not arranged on the radial outside of the output shaft portion 218, the shaft diameter of the output shaft portion 218 can be increased. The strength of the output shaft portion 218 can be increased.

In the lock type bidirectional clutch of the present invention, an actuator that is allowed to revolve around a common rotation axis but is restricted from rotating is fitted into an eccentric wheel provided on an input member. The working external gear formed on the actuator meshes with the output internal gear formed on the output member. As a result, the rotation from the input member to the output member is transmitted to the output member by shifting by the internal gear mechanism after the rotation motion of the input member is once converted into a revolution motion by the actuator. On the other hand, the rotation from the output member is not transmitted to the input member because the output member is locked because the rotation of the actuator is restricted.

Therefore, in the lock type bidirectional clutch of the present invention, the rotation transmission from the output member is blocked by locking the internal gear mechanism without using frictional force, so that the output member is kept stopped. Is not limited by the frictional force. Further, since the locked state of the internal gear mechanism occurs immediately when trying to drive from the output member side, unlike the bidirectional clutch of FIG. 15, no impact noise is generated during operation. Further, the speed fluctuation of the output member due to the repeated biting and releasing of the roller does not occur, and it is not necessary to apply an extra torque for releasing the biting of the roller.

Although the lock type bidirectional clutch configured according to the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment and is appropriately used within a range not departing from the present invention. Can be modified or changed. For example, in the illustrated embodiment, the number of teeth of the working external gear is set to be 1 less than the number of teeth of the output internal gear, but the number of teeth and the difference in the number of teeth of both gears can be arbitrarily set. .. Further, in the illustrated embodiment, both the output internal gear and the working external gear have a trochoidal tooth profile, but if the above-mentioned operation is possible, the tooth profile of both gears is not limited to the trochoid tooth profile and can be any tooth profile. It's okay to have it. Furthermore, in the illustrated embodiment, each component constituting the lock type bidirectional clutch is made of metal, but these may be formed of a synthetic resin or other appropriate material.

2, 102, 202: Lock type bidirectional clutch 4, 104, 204: Input member 6, 106, 206: Output member 14, 114, 214: Eccentric wheel 24, 124, 224: Output internal gear 26, 126, 226 : Actuator 28, 128, 228: Acting external gear

That is, according to the first aspect of the present invention, as a lock type bidirectional clutch that solves the above-mentioned main technical problem, an input member and an output member that can rotate around a common rotation axis are provided, and from the input member. The forward / reverse rotation of the clutch is transmitted to the output member, and the rotation transmission from the output member to the input member is a lock type bidirectional clutch in which the output member becomes non-rotatable and is cut off. hand,
The input member is provided with a cylindrical eccentric ring, the output member is provided with an output internal gear, and the output member is further provided with an output internal gear.
A fixed external gear concentric with the common rotating shaft and an actuator are provided.
The actuator includes an operating internal gear that fits inside the eccentric ring and meshes with the fixed external gear, and an operating external gear that meshes with the output internal gear.
The working external gear and the working internal gear have a common central axis, the number of teeth of the working internal gear is the same as the number of teeth of the fixed external gear, and the actuator has the common rotation. A lock-type bidirectional clutch is provided characterized in that it is permissible to revolve around an axis but is restricted from rotating.
Further, according to the second aspect of the present invention, as a lock type bidirectional clutch that solves the above-mentioned main technical problem, an input member and an output member that can rotate around a common rotation axis are provided, and from the input member. The forward / reverse rotation of the clutch is transmitted to the output member, and the rotation transmission from the output member to the input member is a lock type bidirectional clutch in which the output member becomes non-rotatable and is cut off. hand,
The input member is provided with a cylindrical eccentric ring, the output member is provided with an output internal gear, and the output member is further provided with an output internal gear.
It is provided with a fixing plate and an actuator in which a plurality of engaging holes having a circular cross section are formed at intervals on a virtual circumference centered on the common rotation axis.
The actuator includes a connecting member having a cylindrical fitting wall that fits inside the eccentric ring, and an operating member having an operating external gear that meshes with the output internal gear, and the connecting member and the actuator. The actuating members are integrated by locking means
A plurality of engaging pins to be inserted into each of the plurality of engaging holes formed in the fixing plate are erected on the operating member, and the plurality of engaging pins are integrally inserted into each of the plurality of engaging pins. A lock that is movable along the inner peripheral surface of the engaging hole and that the actuator is allowed to revolve around the common axis of rotation but is restricted from rotating. A type bidirectional clutch is provided.
Furthermore, according to the third aspect of the present invention, as a lock type bidirectional clutch that solves the main technical problem, an input member and an output member that can rotate around a common rotation axis are provided, and the input member is provided. The rotation in the forward and reverse directions is transmitted to the output member, and the rotation from the output member to the input member is transmitted by a lock type bidirectional clutch in which the output member becomes non-rotatable and is cut off. There,
The input member is provided with a cylindrical eccentric ring, the output member is provided with an output internal gear, and the output member is further provided with an output internal gear.
It is provided with a fixing plate and an actuator in which a plurality of engaging holes having a circular cross section are formed at intervals on a virtual circumference centered on the common rotation axis.
The actuator comprises a cylindrical outer fitting wall that fits outside the eccentric ring and an actuating external gear that meshes with the output internal gear.
A plurality of engaging pins to be inserted into each of the plurality of engaging holes formed in the fixing plate are erected on the tip surface of the outer fitting wall, and the plurality of engaging pins are integrated. It is movable along the inner peripheral surface of each of the inserted engaging holes, and the actuator is allowed to revolve around the common axis of rotation but is restricted from rotating. A lock type bidirectional clutch featuring the above is provided.

In the first aspect of the present invention, the tooth bottom surface of the tooth profile of the fixed external tooth gear has a concave arc shape, and the tooth tip surface of the tooth profile of the working internal tooth gear has a convex arc shape. The curvature of the tooth bottom surface of the tooth profile of the tooth gear is preferably smaller than the curvature of the tooth tip surface of the tooth profile of the working internal tooth gear.
In the second aspect of the present invention, the input member includes a cylindrical support wall concentric with the common axis of rotation inside the eccentric ring, and the fitting wall of the connecting member is It is preferable to fit between the eccentric ring and the support wall.
In the third aspect of the present invention, the actuator preferably includes a cylindrical inner fitting wall that fits inside the eccentric ring.
In the first to third aspects of the present invention, the number of teeth of the working external gear is preferably one less than the number of teeth of the output internal gear. Further, both the output internal gear and the working external gear may have a trochoidal tooth profile.

Shows the entire structure of the lock type bidirectional clutch constructed in accordance with a first aspect of the present invention. The figure which shows the input member of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the output member of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the actuator of the lock type bidirectional clutch shown in FIG. 1 by itself. The figure which shows the housing of the lock type bidirectional clutch shown in FIG. 1 alone. The figure for demonstrating the operation when the lock type bidirectional clutch shown in FIG. 1 is rotated from the input member side. The figure for demonstrating the operation when the lock type bidirectional clutch shown in FIG. 1 was tried to rotate from the output member side. Shows the entire structure of the lock type bidirectional clutch constructed in accordance with a second aspect of the present invention. The figure which shows the input member of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the output member of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the actuator of the lock type bidirectional clutch shown in FIG. 8 by itself. The figure which shows the housing of the lock type bidirectional clutch shown in FIG. 8 alone. It is a figure for demonstrating operation when the lock type bidirectional clutch shown in FIG. 8 is rotated from an input member side. It is a lock type bidirectional clutch configured according to the third aspect of the present invention, and is the figure which shows the modification of the lock type bidirectional clutch shown in FIG. The figure which shows an example of the conventional lock type bidirectional clutch. The figure explaining the operation of the lock type bidirectional clutch of FIG.

First, a description will be given to the lock type bidirectional clutch constructed in accordance with a first aspect of the present invention with reference to FIGS. As shown in FIG. 1, the whole is the B Kkutaipu bidirectional clutch represented by number 2, and a rotatable input member 4 and the output member 6 about a common axis of rotation o.

As shown in FIG. 1, b Kkutaipu bidirectional clutch 2 is provided with a common axis of rotation o concentric fixed external gear 34. The fixed external gear 34 is provided entirely in a fixed housing designated by number 36. In FIG. 1, the housing 36 and the shield plate described later are not hatched for easy understanding. Explaining the housing 36 with reference to FIG. 1 and FIG. 5A, the housing 36 is made of metal and has a substantially square end plate 38 and a tubular shape extending axially from the outer peripheral edge of the end plate 38. An outer peripheral wall 40 is provided, and an eccentric ring 14 of the input member 4, an output internal gear 24, and an accommodating space 42 having a circular cross section are provided inside the outer peripheral wall 40. .. A circular central through hole 44 through which the output shaft portion 18 of the output member 6 is inserted and rotatably supports the output shaft portion 18 of the output member 6 is formed in the center of the end plate 38. The fixed external gear 34 is provided at the center of the end plate 38 and inside the outer peripheral wall 40 (that is, inside the accommodation space 42), and as shown in the BB cross section of FIG. 1, the working internal gear 30 Engage with. The tooth profile of the fixed external gear 34 has a concave arc shape, and the curvature of the tooth profile of the fixed external gear 34 is smaller than the curvature of the tooth profile of the working internal gear 30. The number of teeth of the fixed external gear 34 is 9, which is the same as the number of teeth of the working internal gear 30. At the center of the fixed external gear 34, a recess 46 having a circular cross section is formed so as to communicate with the central through hole 44 and open in the accommodation space 42. A well-known bearing 48 that rotatably supports the output shaft portion 18 is arranged in the recess 46. An outer through hole 50 that penetrates in the axial direction is also formed at each corner of the outer peripheral wall 40. A bolt used for fixing a shield plate, which will be described later, is inserted into the outer through hole 50.

Next, with reference to FIGS. 6 and 7, will be described operation of Russia Kkutaipu bidirectional clutch 2. As shown by the arrows in FIG. 6, when the input member 4 is rotated clockwise (when viewed from the right side of the central vertical sectional view) by the motor of the drive source, the eccentric ring 14 of the input member 4 has a common rotation axis o. Rotates eccentrically around. That is, the entire eccentric ring 14 rotates clockwise while moving (revolving) clockwise along a circle having a radius e around a rotation axis o whose center is common. Then, the working internal gear 30 fitted inside the eccentric ring 14 revolves around a common rotation axis o without rotating, as shown by an arrow in the BB cross section. This, in the B Kkutaipu bidirectional clutch 2, hydraulic internal gear 30 with meshed eccentric to fixed external gear 34, because the number of teeth of the two gears are the same. That is, since there is no difference in the number of teeth with the fixed external gear 34, even if the operating internal gear 30 revolves, the operating internal gear 30 rotates with respect to the fixed external gear 34 (rotational movement). ) Is impossible. That is, the working internal gear 30 (actor 26) is allowed to revolve around a common rotating shaft o, but is restricted from rotating. When the working internal gear 30 revolves around a common rotating shaft o, the outer peripheral surfaces of the respective teeth slide with respect to the outer peripheral surfaces of the teeth of the fixed external gear 34.

Next, a description will be given of the second lock type bidirectional clutch constructed in accordance with aspects of the present invention with reference to FIGS 1 3. In the following description, the same configuration as that of the lock type bidirectional clutch 2 described above will be indicated by adding 100 to the same number, and detailed description thereof will be omitted.

As shown in FIG. 8, the whole is provided with a B Kkutaipu bidirectional clutch common axis of rotation o rotatable around the input member 104 and output member 106 indicated by the number 102.

Explaining with reference to FIG. 11, the actuator 126 is composed of a connecting member 164 and an operating member 166 arranged in series in the axial direction. The connecting member 164 includes a cylindrical fitting wall 168 that is rotatably fitted inside the eccentric ring 114. As shown in the central longitudinal section of FIG. 8, in the illustrated embodiment, the fitting wall 168 is fitted inside the eccentric ring 114 via a well-known bearing 131. In the lock type bidirectional clutch 102 , the diameter of the bearing 131 can be made smaller than the diameter of the bearing 31 of the lock type bidirectional clutch 2 in FIG. 1, the manufacturing cost can be reduced, and the radial direction can be changed. It can be made compact. A disk-shaped connecting flange 170 is connected to the other end of the fitting wall 168 in the axial direction (the central longitudinal section of FIG. 8 and the left end in FIG. 11A). A circular through hole 172 is formed in the center of the connection flange 170, and inside the circular through hole 172, the end surface of the support wall 162 of the input member 104 is in contact with the output flange 122 of the output member 106 and is bearing by this. A cylindrical connecting wall 174 extending axially opposite to the fitting wall 168 is formed on the outer peripheral edge of the connecting flange 170. A plurality of locking grooves 176 extending linearly in the axial direction are formed on the inner peripheral surface of the connecting wall 174 at equal intervals in the circumferential direction. The actuating member 166 includes a circular actuating substrate 178 located inside the connecting wall 174. On the outer peripheral surface of the operating substrate 178, a plurality of locking ridges 180 that protrude outward in the radial direction and engage with the locking groove 176 formed inside the connecting wall 174 are formed corresponding to the locking groove 176. There is. From this, the operating member 166 is integrated with the connecting member 164 and has a common central axis o'by locking (locking means) between the locking groove 176 and the locking ridge 180. A circular through hole 181 is formed in the center of the operating board 178, through which the output shaft portion 118 is inserted. The working external gear 128 is formed in the center of one side surface of the working substrate 178 (the central longitudinal section of FIG. 8 and the right side in FIG. 11B), and has eight teeth. A plurality of engaging pins 182 are erected on the outer peripheral edge of the other side surface (the left side surface of the same) of the operating board 178 at equal intervals in the circumferential direction, and nine in the illustrated embodiment. These plurality of engaging pins 182 are provided corresponding to the number of a plurality of engaging holes formed in the fixing plate described later, and are inserted into each of them. In the illustrated embodiment, the cross-sectional shape of the engaging pin 182 is circular, but it may be polygonal if desired.

As shown in FIG. 8, b Kkutaipu bidirectional clutch 102, the fixing plate 186 in cross-section a circular engaging hole 184 is formed in plurality at intervals in the circumferential direction on the virtual circumference around the common axis of rotation o Is equipped with. In the illustrated embodiment, the fixing plate 186 is substantially square and is entirely provided in the fixed housing designated by number 136. Explaining the housing 136 with reference to FIG. 8 (a), the fixing plate 186 is an end plate of the housing, and a tubular outer peripheral wall 140 extending in the axial direction is provided on the outer peripheral edge thereof. .. The fixing plate 186 is also formed with a central through hole 144 and a recess 146. Nine engagement holes 184 are formed, and all of them are open toward the accommodation space 142. The diameter of the engagement hole 184 is larger than the diameter of the engagement pin 182 formed on the actuating member 166 of the actuator 126, and each of the plurality of engagement holes 184 is formed on the actuating member 166 of the actuator 126. The engaging pins 182 of the above are inserted one by one. The open end of the outer wall 140 is closed by the shield plate 152 shown in FIG. 12 (b). The shield plate 152 includes a central through hole 154 and a recess 156.

Subsequently, referring to FIG. 13, description will be made on the operation of the case of rotating the input member 104 in a clockwise direction (as viewed from the right side of the central longitudinal section) in Russia Kkutaipu bidirectional clutch 102. As shown by each arrow in FIG. 13, when the input member 104 rotates clockwise, the eccentric ring 114 has a radius around a rotation axis o whose center is common, similar to the lock type bidirectional clutch 2 in FIG. The whole rotates clockwise while moving (revolving) clockwise along the circle of e. Then, as shown by the arrows in the AA cross section, the fitting wall 168 of the connecting member 164, which is a part of the actuator 126 fitted inside the eccentric ring 114, revolves around the common rotation axis o without rotating. do. Explaining this, the connecting member 164 having the fitting wall 168 is integrally connected to the operating member 166, and the plurality of engaging pins 182 formed on the operating member 166 each have a plurality of engagements formed on the fixing plate 186. This is because the rotation of the actuator 126 is regulated because it is inserted into each of the joint holes 184. On the other hand, since the diameter of the engaging pin 182 is smaller than the diameter of the engaging hole 184, each of the plurality of engaging pins 182 can move in the engaging hole 184 inserted integrally. From this, when the input member 104 rotates clockwise, as shown in the CC cross section, the plurality of engaging pins 182 slide along the inner peripheral surfaces of the respective engaging holes 184 inserted integrally. It moves, that is, revolves, and the actuator 126 revolves around a common rotation axis o without rotating.

Therefore, the rotation motion of the input member 104 is once converted into the revolution motion of the actuator 126. At this time, rotation is transmitted from the input member 104 to the actuator 126 at a constant speed without shifting. Then, as in the lock type bidirectional clutch 2 of FIG. 1, the rotation of the actuator 126 that revolves at a constant speed with the rotation of the input member 104 causes the working external gear 128 and the output internal gear 124 formed therein to rotate. By meshing, the gear is changed and transmitted to the output member 106. At this time, according to the above equation, the rotation of the input member 104 is reduced to 1/9 and transmitted to the output member 106. B Kkutaipu In the bidirectional clutch 102, since the each of the plurality of engagement pins 182 contacts the respective plurality of engagement holes 184, are prevented from falling of the entire actuator 126, the output member from the input member 104 The rotation can be stably transmitted to the 106.

Even in Russia Kkutaipu bidirectional clutch 102, the transmission of rotation from the output member 106 to the input member 104 but the output member 106 is blocked by the lock, this is because the lock type bidirectional clutch 2 shown in FIG. 1 It's the same as the one.

FIG. 14 shows a modification of the lock type bidirectional clutch 102 shown in FIG. 8, which is a lock type bidirectional clutch configured according to the third aspect of the present invention . In the following description, the same configuration as that of the lock type bidirectional clutch described above will be indicated by adding 200 to the same number, and detailed description thereof will be omitted.

Claims (9)

An input member and an output member that can rotate around a common rotation axis are provided, and forward / reverse rotation from the input member is transmitted to the output member, and rotation from the output member to the input member is performed. The transmission is a lock type bidirectional clutch in which the output member becomes non-rotatable and is shut off.
The input member is provided with a cylindrical eccentric ring, and the output member is provided with an output internal gear.
The eccentric ring is fitted with an actuator that is allowed to revolve around the common axis of rotation but is restricted from rotating.
A lock type bidirectional clutch characterized in that the actuator includes an operating external gear that meshes with the output internal gear. It is equipped with a fixed external gear that is concentric with the common rotating shaft.
The actuator includes an working internal gear that fits inside the eccentric ring, meshes with the fixed external gear, and has a central axis common to the working external gear.
The lock type bidirectional clutch according to claim 1, wherein the number of teeth of the working internal gear is the same as the number of teeth of the fixed external gear. The tooth profile of the fixed external gear has a concave arc shape, the tooth profile of the working internal gear has a convex arc shape, and the curvature of the tooth profile of the fixed external gear is the working internal tooth. The lock type bidirectional clutch according to claim 2, which is smaller than the curvature of the tooth profile of the gear. A fixing plate having a plurality of engaging holes having a circular cross section formed at intervals on a virtual circumference centered on the common rotation axis is provided.
The actuator includes a connecting member having a cylindrical fitting wall that fits inside the eccentric ring, and an operating member having the operating external gear, and the connecting member and the operating member are locked. It is locked by means and can revolve as a unit.
A plurality of engaging pins to be inserted into each of the plurality of engaging holes formed in the fixing plate are erected on the operating member, and the plurality of engaging pins are integrally inserted. The lock type bidirectional clutch according to claim 1, which is movable along the inner peripheral surface of each of the engaging holes. The input member includes a cylindrical support wall concentric with the common rotating shaft inside the eccentric ring, and the fitting wall of the connecting member fits between the eccentric ring and the support wall. The lock type bidirectional clutch according to claim 4, which is inserted. A fixing plate having a plurality of engaging holes having a circular cross section formed at intervals on a virtual circumference centered on the common rotation axis is provided.
The actuator comprises a cylindrical outer fitting wall that fits outside the eccentric ring.
A plurality of engaging pins to be inserted into each of the plurality of engaging holes formed in the fixing plate are erected on the tip surface of the outer fitting wall, and the plurality of engaging pins are integrally formed. The lock type bidirectional clutch according to claim 1, which is movable along the inner peripheral surface of each of the engaging holes inserted therein. The lock type bidirectional clutch according to claim 6, wherein the actuator includes a cylindrical inner fitting wall that fits inside the eccentric ring. The lock type bidirectional clutch according to any one of claims 1 to 7, wherein the number of teeth of the working external gear is one less than the number of teeth of the output internal gear. The lock type bidirectional clutch according to any one of claims 1 to 8, wherein both the output internal gear and the working external gear have a trochoidal tooth profile.

Images