Ratchet type clutch and assembly method of the same

Abstract

To provide a ratchet type clutch capable of biasing claw members stably.SOLUTION: A ratchet type clutch 1 has: an inner ring 5; an outer ring 3 disposed coaxially with the inner ring 5 so as to be rotatable relative to the inner ring 5; a first claw member 11 which may lock relative rotation of the inner ring 5 relative to the outer ring 3 in a first rotation direction; a second claw member 12 which may lock relative rotation of the inner ring 5 relative to the outer ring 3 in a second rotation direction; a retainer 7 which retains the first claw member 11 and the second claw member 12 and is fixed to the outer ring 3; and plate spring members 8 configured to bias the first claw member 11 and the second claw member 12 to the retainer 7. The first claw member 11 and the second claw member 12 respectively have rotation centers 11c, 12c. The plate spring members 8 respectively bias the rotation centers 11c, 12c.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a ratchet-type clutch and an assembling method of the ratchet-type clutch.

Background Art

[0002] There is a clutch using a ratchet mechanism that can switch the torque transmission direction by switching between a state of locking only rotation in one of the rotational directions, either the forward or reverse direction, with respect to the rotational direction of the inner ring member with respect to the outer ring member or the outer ring member with respect to the inner ring member, a state of simultaneously locking rotation in both the forward and reverse rotational directions, and a state of not locking rotation in either the forward or reverse rotational direction.

[0003] The clutch using the above-described ratchet mechanism is used as a torque transmission device in vehicles, industrial machines, etc. The ratchet-type clutches disclosed in Patent Documents 1 and 2 have a configuration in which a plurality of pairs of claw members are held on the outer ring via a retainer, and each claw member is biased toward the inner ring by each coil-shaped spring.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the configurations disclosed in Patent Documents 1 and 2, the claw members are held by an outer ring or a housing portion provided in the retainer in conformity with the shape of the claw members. However, since the shape of the housing portion is complex and thin-walled, the manufacturing cost is high. Further, it is necessary to set a certain gap with respect to the claw members in the housing portion. During high-speed rotation, the behavior of the claw members becomes erratic due to the gap, and the claw members strongly collide with the outer ring or the retainer, which may cause damage to the periphery of the housing portion.

[0006] An object of the present invention is to provide a ratchet-type clutch capable of stably biasing a claw member.

Means for Solving the Problems

[0007] In order to achieve the above object, the present invention provides a first annular member, a second annular member disposed coaxially with and relatively rotatable with respect to the first annular member, and a first rotation of the first annular member with respect to the second annular member. A first claw member capable of locking relative rotation in a direction, a second claw member capable of locking relative rotation of the first annular member with respect to the second annular member in a second rotation direction, and the first claw member and the second claw member are held. A holding member fixed to the second annular member, a first biasing member that biases the first claw member and the second claw member with respect to the holding member, and a second biasing member that biases the first claw member and the second claw member in the radial direction. In a ratchet-type clutch having the above, the first claw member and the second claw member each have a rotation center, and the first biasing member biases each of the rotation centers.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a ratchet-type clutch capable of stably biasing a claw member.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the torque transmission direction switching type ratchet type clutch 1 according to the embodiment of the present invention will be described with reference to the drawings. The torque transmission direction switching type ratchet type clutch 1 according to the embodiment will be described as an example used as a component of a vehicle transmission.

[0011] First, the directions in the ratchet type clutch 1 according to the embodiment will be defined. In the embodiment, the "central axis C" refers to the central axis C of the ratchet type clutch 1, that is, the axis of the outer ring 3 (second annular member) and the inner ring 5 (first annular member), and the axial direction (X-axis direction), radial direction (Z-axis direction), and circumferential direction (Y-axis direction) refer to the axial direction, radial direction, and circumferential direction with respect to the central axis C. Further, regarding the axial direction, in FIG. 1, the direction toward the front of the paper surface is taken as one axial direction, and the direction toward the back of the paper surface is taken as the other axial direction. Regarding the circumferential direction, in FIG. 1, the direction of rotating clockwise toward the paper surface is taken as one circumferential direction, and the direction of rotating counterclockwise toward the paper surface is taken as the other circumferential direction.

[0012] Regarding the rotation direction of the ratchet type clutch 1, for the sake of convenience in explanation, the rotation direction of the inner ring 5 with respect to the outer ring 3 will be described. However, the rotation of the outer ring 3 and the rotation of the inner ring 5 are relative to each other. For example, when the inner ring 5 can rotate clockwise, the outer ring 3 can also rotate counterclockwise. Also, even when the inner ring 5 and the outer ring 3 rotate in the same direction, if the rotation speeds of the outer ring 3 and the inner ring 5 are different, it can be said that the outer ring 3 and the inner ring 5 rotate relative to each other in either direction.

[0013] FIG. 1 is a front view of the ratchet type clutch 1 according to the embodiment, as viewed from the axial direction. The switching member that controls the claw mechanism portion described later is not shown.

[0014] The ratchet type clutch 1 according to the embodiment includes an annular outer ring 3, an annular inner ring 5 that is spaced radially inward from the outer ring 3, is coaxial with the central axis C of the outer ring 3, and is arranged to be relatively rotatable with respect to the outer ring 3, an annular retainer 7 (retaining member) located between the outer ring 3 and the inner ring 5, and a torque transmission mechanism that enables torque transmission between the outer ring 3 and the inner ring 5. The torque transmission mechanism in the embodiment is a ratchet mechanism.

[0015] The outer ring 3 is a cylindrical member having a predetermined length in the axial direction. A plurality of claw mechanism portions described later are held on the inner peripheral surface (inner peripheral portion) of the outer ring 3. On the outer peripheral surface (outer peripheral portion) of the outer ring 3, a plurality of convex portions 3c that protrude radially outward and extend in the axial direction are provided at arbitrary intervals in the circumferential direction. By fitting these convex portions 3c into the fitting portions of an outer member (not shown), the outer ring 3 is fixed so as not to be relatively rotatable with respect to the outer member.

[0016] As shown in Fig. 1, on the inner peripheral surface of the outer ring 3, a first claw member 11 and a second claw member 12 which is adjacent to one side in the circumferential direction of the first claw member 11 and forms a pair with the first claw member 11 are provided. The first claw member 11 and the second claw member 12 constitute a claw mechanism portion. That is, on the inner peripheral surface of the outer ring 3, as viewed from one axial side, a claw mechanism portion including the first claw member 11 and the second claw member 12 which are arranged in order and form a pair toward one side in the circumferential direction is provided. A plurality of such claw mechanism portions are provided on the outer ring 3 at predetermined intervals in the circumferential direction. The first claw member 11 has a cylindrical portion 11c extending in the direction of the central axis C, a protruding portion 11a extending from the cylindrical portion 11c toward the other side in the circumferential direction, and a claw portion 11b extending toward one side in the circumferential direction. The second claw member 12 has a cylindrical portion 12c extending in the direction of the central axis C, a protruding portion 12a extending from the cylindrical portion 12c toward one side in the circumferential direction, and a claw portion 12b extending toward the other side in the circumferential direction.

[0017] The inner ring 5 is arranged radially inward of the outer ring 3. On the outer peripheral portion of the inner ring 5, a plurality of tooth portions are formed at equal intervals over the entire circumference. Each tooth portion protrudes radially outward and extends in the direction of the central axis C. The inner peripheral surface of the outer ring 3 and the outer peripheral portion (tooth portion) of the inner ring 5 face each other radially via a predetermined space. The tooth portion constitutes a ratchet tooth with which the first claw member 11 and the second claw member 12 mesh. Specifically, on one side in the circumferential direction of each tooth portion, the side surface facing the claw portion 11b of the first claw member 11 constitutes a first meshing portion 5a (first engaging portion) that meshes with the claw portion 11b. On the other hand, on the other side in the circumferential direction of each tooth portion, the side surface facing the claw portion 12b of the second claw member 12 constitutes a second meshing portion 5b (second engaging portion) that meshes with the claw portion 12b. By the first claw member 11 engaging with the first meshing portion 5a, it is possible to lock the relative rotation of the inner ring 5 with respect to the outer ring 3 in the first rotational direction. Also, by the second claw member 12 engaging with the second meshing portion 5b, it is possible to lock the relative rotation of the inner ring 5 with respect to the outer ring 3 in the second rotational direction, and the inner ring 5 and the outer ring 3 can be engaged so as to be torque-transmittable.

[0018] On the inner peripheral surface of the inner ring 5, splines 5c are provided over the entire circumference, and a shaft member (not shown) for output or input is spline-fitted via the splines 5c.

[0019] In the embodiment, the first claw member 11 and the second claw member 12 are held by the outer ring 3 via the cage 7. The cage 7 can be formed by injection molding using, for example, a resin material.

[0020] The cylindrical portion 11c, the claw portion 11b, and the protruding portion 11a of the first claw member 11 are integrally formed. The first claw member 11 is rotatably held by the cage 7 with the cylindrical portion 11c as the rotation center. On the inner peripheral surface of the outer ring 3, an engaging portion 3a is provided for the protruding portion 11a of the first claw member 11 to engage, which opens radially inward, and the first claw member 11 is arranged at a position where the protruding portion 11a enters the engaging portion 3a. The first claw member 11 is urged radially inward by the first coil spring 9a of the pair of coil springs 9 (the second biasing member) in the shape of a coil, and the protruding portion 11a is in sliding contact with the engaging portion 3a. Note that the pair of coil springs 9 are compression coil springs.

[0021] The claw portion 12b and the protruding portion 12a of the second claw member 12 have the same circumferential length and radial thickness. The cylindrical portion 12c, the claw portion 12b, and the protruding portion 12a are integrally formed. The second claw member 12 is rotatably held by the cage 7 with the cylindrical portion 12c as the rotation center. On the inner peripheral surface of the outer ring 3, a sliding portion 3b is provided for the protruding portion 12a of the second claw member 12 to slide, which opens radially inward, and the second claw member 12 is arranged at a position where the protruding portion 12a enters the sliding portion 3b. The second claw member 12 is urged radially inward by the second coil spring 9b of the pair of coil springs 9 in the shape of a coil, and the protruding portion 12a is in sliding contact with the sliding portion 3b.

[0022] In this way, the first claw member 11 and the second claw member 12 held on the inner peripheral surface of the outer ring 3, the pair of coil springs 9, and the tooth portion formed on the inner ring 5 constitute a ratchet mechanism.

[0023] In the embodiment, a plurality of first claw members 11, a plurality of pairs of coil springs 9, a plurality of second claw members 12, and a leaf spring member 8 (first biasing member) described later are held on the inner peripheral side of the outer ring 3 via a cage 7. Specifically, these plurality of first claw members 11 and second claw members 12 are held by an annular cage 7 fitted on the inner peripheral side of the outer ring 3. The cage 7 is disposed on the inner peripheral side of the outer ring 3.

[0024] FIG. 2(A) is an exploded perspective view of a ratchet type clutch 1 according to the embodiment. FIG. 2(B) is an exploded perspective view of the ratchet type clutch 1 with the cage 7 assembled to the inner ring 5. FIG. 3 is a perspective view of the ratchet type clutch 1 with the inner ring 5 and the cage 7 assembled to the outer ring 3. With reference to FIGS. 2(A), (B), and FIG. 3, the configuration of the outer ring 3 and the cage 7 of the ratchet type clutch 1 according to the embodiment and the assembling method of the ratchet type clutch 1 will be described.

[0025] The inner peripheral surface of the outer ring 3 is formed in a shape corresponding to a plurality of spring fixing portions 7f (described later) provided on the outer peripheral portion of the cage 7 and a plurality of leaf spring members 8 disposed between the spring fixing portions 7f in the circumferential direction. Specifically, on the inner peripheral surface of the outer ring 3, radial recesses 3f corresponding to the spring fixing portions 7f and radial protrusions 3g corresponding to the leaf spring members 8 are alternately formed in the circumferential direction. Further, on one end surface of the outer ring 3 in the axial direction, an annular recess 3e with which the flange portion 7e of the cage 7 engages is formed.

[0026] The outer peripheral surface of the cage 7 is formed with a plurality of spring fixing portions 7f, accommodation portions 7h on both circumferential sides of the spring fixing portions 7f for accommodating the protruding portions 11a of the first claw members 11, and accommodation portions 7i for accommodating the protruding portions 12a of the second claw members 12, alternately in the circumferential direction. A flange portion 7e is formed at one end of the cage 7 in the axial direction. The cage 7 is an annular member coaxial with the outer ring 3.

[0027] Next, the steps of the assembling method of the ratchet type clutch 1 will be described. For the assembly of the ratchet type clutch 1, first, the leaf spring member 8 is inserted into the recess 7g of the cage 7 from the outside of the cage 7. The circumferential positions of the cage 7 and the outer ring 3 are aligned so that the leaf spring member 8 inserted into the recess 7g of the cage 7 matches the position of the radially convex portion 3g of the outer ring 3. Then, the assembly of the cage 7 and the leaf spring member 8 is inserted into the outer ring 3 from the other axial side of the outer ring 3 toward the one axial side, and the flange portion 7e of the cage 7 is engaged with the annular recess 3e on the end face of the outer ring 3. By engaging the flange portion 7e with the annular recess 3e, the assembly of the cage 7 and the leaf spring member 8 is positioned with respect to the outer ring 3.

[0028] Then, a pair of coil springs 9 are inserted into a pair of holes provided through the spring fixing portion 7f on the outer peripheral surface of the cage 7 from the inside in the radial direction toward the outside in the radial direction. Then, the first claw member 11 and the second claw member 12 are inserted into the cage 7 from the axial direction so that the protruding portion 11a of the first claw member 11 is accommodated in the accommodating portion 7h of the cage 7 and the protruding portion 12a of the second claw member 12 is accommodated in the accommodating portion 7i. The first claw member 11 and the second claw member 12 are biased by the leaf spring member 8 and are radially biased by the first coil spring 9a and the second coil spring 9b, respectively. One end side of the pair of coil springs 9 abuts against the inner peripheral portion of the outer ring 3, and the other end side of the pair of coil springs 9 abuts against the first claw member 11 and the second claw member 12, respectively. Then, the inner ring 5 is inserted inside the cage 7 assembled to the outer ring 3. When a switching member (not shown) is to be assembled, the switching member is assembled. The ratchet type clutch 1 can be assembled by the above procedure.

[0029] Next, the leaf spring member 8 of the embodiment will be described with reference to FIG. 4. FIG. 4 is a perspective view of a pair of leaf spring members 8 according to the embodiment. The leaf spring member 8 extends in the circumferential Y-axis direction as the longitudinal direction, has a thickness in the radial Z-axis direction, and is a leaf spring having a length of a first width x1 in the axial X-axis direction. A gripping portion including a first flat portion 8a is formed at the center in the longitudinal direction of the leaf spring member 8. The first flat portion 8a is a plane including the X-axis direction and the Y-axis direction, and a second width x2 in the axial direction is shorter than the width x1. By making the second width x2 shorter than the first width x1, it is easier to insert or remove the leaf spring member 8 into or from the retainer 7. A second flat portion 8b extending in the ±Y-axis direction is formed at a position in the positive direction of the Z-axis direction from the first flat portion 8a. Further, a third flat portion 8c extending in the ±Y-axis direction is formed at a position in the positive direction of the Z-axis direction from the second flat portion 8b. And at the ±Y-axis direction ends of the third flat portion 8c, holding portions 8d (ends) for holding and biasing the first or second claw members 11, 12 are formed. The holding portion 8d has an R shape following the shapes of the cylindrical portions 11c of the first claw member 11 and the cylindrical portions 12c of the second claw member 12. The leaf spring member 8 has different first to third flat portions 8a to 8c in the +Z-axis direction, thereby exerting an action of holding and biasing the first and second claw members 11, 12.

[0030] FIG. 5(A) shows details of a conventional claw member housing portion. FIG. 5(B) shows details of the claw member housing portion according to the embodiment. In the conventional configuration, the first and second claw members 11, 12 are housed and held by an outer diameter side housing portion 7a and an inner diameter side housing portion 7b formed in the retainer 7. Thus, in the conventional configuration, the shape of the inner diameter side housing portion 7b is complicated and the inner diameter side housing portion 7b is formed to be thin. Also, in the conventional configuration, it is necessary to set a certain gap between the outer diameter side housing portion 7a and the inner diameter side housing portion 7b. During high-speed idling, the behaviors of the first and second claw members 11, 12 become erratic due to the gap, and the first and second claw members 11, 12 may strongly collide with the outer ring 3 or the retainer 7, leading to damage to the periphery of the claw member housing portion.

[0031] On the other hand, in the claw member housing portion according to the embodiment, instead of the conventional inner diameter side housing portion 7b, the first and second claw members 11 and 12 are biased and held by the holding portion 8d of the leaf spring member 8. By generating an elastic force in the -Z axis direction in the third flat portion 8c of the leaf spring member 8, the holding portion 8d having an R shape biases the cylindrical portion 11c of the first claw member 11 and the cylindrical portion 12c of the second claw member 12 with respect to the outer diameter side housing portion 7a.

[0032] By replacing the conventional claw member housing portion with the leaf spring member 8 of the embodiment as described above, machining of the inner diameter side housing portion 7b becomes unnecessary, and it becomes possible to reduce the product cost. Further, by sandwiching the first and second claw members 11 and 12 between the outer diameter side housing portion 7a and the holding portion 8d of the leaf spring member 8, the conventional gap disappears, so that the behavior of the first and second claw members 11 and 12 during high-speed idling is stabilized and the durability is improved.

[0033] Further, the leaf spring member 8 is inserted into the concave portion 7g of the retainer 7 in the radial direction from the outer side of the outer periphery, and is pushed radially until the second flat portion 8b of the leaf spring member 8 abuts against the retainer 7. Then, the holding portions 8d at both ends of the leaf spring member 8 abut against the cylindrical portion 11c of the first claw member 11 and the cylindrical portion 12c of the second claw member 12, respectively. When removing the leaf spring member 8 from the concave portion 7g, the leaf spring member 8 can be easily removed by pulling it radially outward while gripping the first flat portion 8a. Thus, in the ratchet type clutch 1 of the embodiment, since the leaf spring member 8 can be inserted from the outer side of the outer periphery of the retainer 7, it has an excellent effect of good assemblability.

[0034] Next, the operation of the ratchet type clutch 1 of the embodiment will be described. The ratchet type clutch 1 can take the following three states by changing the combination of the engaged state and the non-engaged state of the first claw member 11 and the second claw member 12 with respect to the tooth portion of the inner ring 5. FIG. 6(A) shows the position of the claw mechanism portion in the first state of two-way locking. FIG. 6(B) shows the position of the claw mechanism portion in the second state of one-way locking. FIG. 6(C) shows the position of the claw mechanism portion in the third state of two-way free rotation. Note that the ratchet type clutch 1 of the embodiment may be configured to switch the locking direction of the rotation of the inner ring 5 with respect to the outer ring 3 by a switching member (not shown) that controls the claw mechanism portion. Alternatively, the engagement between the claw mechanism portion and the tooth portion of the inner ring 5 may be released when the rotational speed of the outer ring 3 exceeds a predetermined speed due to centrifugal force.

[0035] As shown in FIG. 6(A), in the first state of the ratchet type clutch 1 of the embodiment, the first claw member 11 and the second claw member 12 are engaged with the first engagement portion 5a and the second engagement portion 5b of the inner ring 5 by the biasing forces of the first coil spring 9a and the second coil spring 9b, respectively. In this first state, the inner ring 5 is locked against rotation in either the circumferential direction one way or the circumferential direction other way with respect to the outer ring 3. Therefore, neither one-way torque nor the other-way torque is transmitted from the inner ring 5 to the outer ring 3.

[0036] As shown in FIG. 6(B), in the second state of the ratchet type clutch 1 of the embodiment, the first claw member 11 rotates about the cylindrical portion 11c, and the claw portion 11b is displaced radially outward and held. In this second state, the second claw member 12 is engaged with the second engagement portion 5b of the inner ring 5 by the biasing force of the second coil spring 9b, and the first claw member 11 is non-engaged with the first engagement portion 5a of the inner ring 5. In this second state, the inner ring 5 is rotatable with respect to the outer ring 3 in the circumferential direction other way, and rotation in the circumferential direction one way is locked. Therefore, one-way torque is transmitted from the inner ring 5 to the outer ring 3, and the other-way torque is not transmitted.

[0037] In the third state of the ratchet type clutch 1 of the embodiment, as shown in FIG. 6(C), the first claw member 11 rotates about the cylindrical portion 11c, and the claw portion 11b is pushed upward in the radial direction and held. Similarly, the second claw member 12 also rotates about the cylindrical portion 12c, and the claw portion 12b is pushed upward in the radial direction and held. In this third state, both the first claw member 11 and the second claw member 12 are not engaged with the first engagement portion 5a and the second engagement portion 5b of the inner ring 5. In this third state, the inner ring 5 is not locked against rotation in either the circumferential direction one way or the circumferential direction the other way with respect to the outer ring 3, and rotation in either the circumferential direction one way or the circumferential direction the other way is possible. Therefore, neither torque in one direction nor torque in the other direction is transmitted from the inner ring 5 to the outer ring 3.

[0038] As described above, in the ratchet type clutch 1 of the embodiment, by adopting the leaf spring member 8, machining of the inner diameter side accommodating portion 7b becomes unnecessary, and reduction of product cost becomes possible. Further, since the leaf spring member 8 can be inserted from the outer side of the outer circumference of the holder 7, the assemblability does not deteriorate. Furthermore, by sandwiching the first and second claw members 11 and 12 between the outer diameter side accommodating portion 7a and the holding portion 8d of the leaf spring member 8, the behavior of the first and second claw members 11 and 12 during high-speed idling is stabilized and the durability is improved. According to the embodiment, it is possible to provide a ratchet type clutch 1 capable of stably biasing the claw member.

Description of Reference Numerals

[0039] 1 Ratchet type clutch 3 Outer ring (second annular member) 5 Inner ring (first annular member) 5a First engagement portion (first engaging portion) 5b Second engagement portion (second engaging portion) 7 Holder (holding member) 8 Leaf spring member (first biasing member) 8a First flat portion 8b Second flat portion 8c Third flat portion 8d Holding portion (end portion) 9 Pair of springs (second biasing member) 11 First claw member 11c Cylindrical part (rotation center) 12 Second claw member 12c Cylindrical part (rotation center)

Claims

1. a first annular member, a second annular member disposed coaxially with and relatively rotatable with respect to the first annular member, a first claw member capable of locking the relative rotation of the first annular member with respect to the second annular member in a first rotational direction, a second claw member capable of locking the relative rotation of the first annular member with respect to the second annular member in a second rotational direction, a holding member that holds the first claw member and the second claw member and is fixed to the second annular member, a first biasing member that biases the first claw member and the second claw member with respect to the holding member, a second biasing member that biases the first claw member and the second claw member in the radial direction, in a ratchet-type clutch having: the first claw member and the second claw member each have a rotation center, and the first biasing member biases each of the rotation centers, a ratchet-type clutch characterized by this.

2. The first biasing member is a leaf spring member extending in the circumferential direction, and each end in the circumferential direction of the leaf spring member biases the rotation center of the first claw member and the rotation center of the second claw member, the ratchet-type clutch according to claim 1, characterized by this.

3. The second biasing member is a compression coil spring, the ratchet-type clutch according to claim 1, characterized by this.

4. A first flat surface portion as a gripping portion is provided at the longitudinal center of the first biasing member, a second flat surface portion is provided at a position radially inside the first flat surface portion, a third flat surface portion is provided at a position radially inside the second flat surface portion, and a holding portion that biases the first or second claw member is provided at an end of the third flat surface portion, the ratchet-type clutch according to claim 1, characterized by this.

5. The first biasing member is inserted radially from the outside of the outer circumference of the holding member, and the second flat surface portion is in contact with the holding member, the ratchet-type clutch according to claim 4, characterized by this.

6. The holding member is an annular member coaxial with the second annular member and fits into the inner circumferential surface of the second annular member, The holding member is formed of a resin material, the ratchet-type clutch according to claim 1, characterized by this.

7. The first annular member includes a plurality of first engaging portions and second engaging portions, The first claw member locks the relative rotation of the first annular member with respect to the second annular member in the first rotational direction by engaging with the first engaging portion, whereby the first annular member and the second annular member are engaged so as to be able to transmit torque. The second claw member locks the relative rotation of the first annular member with respect to the second annular member in the second rotational direction by engaging with the second engaging portion, whereby the first annular member and the second annular member are engaged so as to be able to transmit torque. The ratchet type clutch according to any one of claims 1 to 6, characterized in that.

8. A first annular member, A second annular member arranged coaxially and rotatably relative to the first annular member, A first claw member capable of locking the relative rotation of the first annular member with respect to the second annular member in the first rotational direction, A second claw member capable of locking the relative rotation of the first annular member with respect to the second annular member in the second rotational direction, A holding member that holds the first claw member and the second claw member and is fixed to the second annular member, A first biasing member that biases the first claw member and the second claw member with respect to the holding member, A second biasing member that biases the first claw member and the second claw member in the radial direction, and a method for assembling a ratchet type clutch having the same, Inserting the first annular member into the holding member, Inserting the first biasing member into the holding member from the outside of the holding member, Arranging the first claw member and the second claw member between the first annular member and the holding member so that the rotation center of the first claw member and the rotation center of the second claw member are biased by the first biasing member, Inserting the second biasing member from the outside toward the inside into a pair of holes provided to penetrate the outer peripheral portion of the holding member in the radial direction, Inserting the holding member into the second annular member. A method for assembling a ratchet type clutch having the same.

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