Lockup device for torque converter

Abstract

A lock device of a torque converter capable of preventing a lockup mechanism from being disengaged. The lock device (4) includes a clutch portion (24) disposed between a front cover (2) and a turbine (11) to transmit or cut off torque, and a damper portion (28) to transmit torque from the clutch portion (24) to the turbine (11) and to absorb or damp torsional vibration. The damper portion (28) includes an input member coupled to the clutch portion (24), an output member rotatable relative to the input member and coupled to the turbine (11), an elastic member elastically coupling the input member and the output member in a rotational direction, and a support member including a coupling portion, a restriction portion, and a stop portion. The coupling portion is coupled to the input member. The restriction portion is disposed so as to sandwich the output member in an axial direction of a portion of the input member. The stop portion is capable of abutting against the output member to prohibit the input member and the output member from rotating relative to each other by a prescribed angle or more.

Description

Technical Field

[0001] This invention relates to locking devices, and more particularly to locking devices for torque converters that transmit torque from the front cover to components on the transmission side via a turbine. Background Technology

[0002] The locking mechanism of a torque converter typically includes a damping section to absorb and reduce torsional vibrations. The damping section comprises an input side plate and an output side plate that can rotate relative to each other; and multiple helical springs acting as elastic members disposed between the two plates. The input side plate receives torque from the clutch section. The output side plate is connected to the turbine of the torque converter.

[0003] In the damping section described above, a stop mechanism is provided to limit the relative rotation angle (torsion angle) between the input side plate and the output side plate within a specified angle range. This stop mechanism prevents excessive torque from being input to the coil spring, and by limiting the workload of the coil spring, the torsion angle can be controlled.

[0004] Here, the stop mechanism shown in Patent Document 1 consists of an engaging portion disposed axially between the elastic member and the outer periphery of the turbine housing, limiting the relative rotation angle range between the first rotating member and the second rotating member. Furthermore, the stop mechanism shown in Patent Document 2 consists of a stop pawl provided on one of the input side plate and the output side plate, and a hole provided on the other side of the two plates for the stop pawl to insert into. Moreover, by the stop pawl abutting against the hole, the torsional angle between the input side plate and the output side plate is limited.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-37982

[0008] Patent Document 2: Japanese Patent Application Publication No. 2004-156692 Summary of the Invention

[0009] In the locking devices of Patent Document 1 and Patent Document 2, when the input component and the output component are axially separated, the stop mechanism may disengage.

[0010] The objective of this invention is to prevent the stop mechanism from disengaging in a locking device.

[0011] (1) The locking device of the present invention is a locking device for a torque converter that transmits torque from the front cover to the transmission side via a turbine of a torque converter. The locking device includes a clutch portion and a damping portion. The clutch portion is disposed between the front cover and the turbine, and transmits or cuts off torque. The damping portion transmits torque from the clutch portion to the turbine and absorbs or attenuates torsional vibrations. The damping portion includes an input member, an output member, a plurality of elastic members, and a support member. The input member is connected to the clutch portion. The output member is rotatable relative to the input member and is connected to the turbine. The elastic members elastically connect the input member and the output member in the rotational direction. The support member includes a connecting portion, a limiting portion, and a stop portion. The connecting portion is connected to the input member. The limiting portion is provided such that it clamps the output member axially between a portion of the input member and the input member. The stop portion is capable of abutting against the output member and prevents the input member and the output member from rotating relative to each other beyond a predetermined angle.

[0012] In this locking device, the output component is clamped by a pair of input-side components (an input component and a support component), and these components are configured to be unable to move relative to each other in the axial direction. Furthermore, the support component abuts against the output component in the circumferential direction, forming a stop mechanism for limiting the torsional angle. That is, by configuring the input and output components to be unable to move relative to each other in the axial direction, and by forming a stop mechanism through these components, disengagement of the stop mechanism can be prevented.

[0013] (2) Preferably, the support member has multiple support portions, annular portions, and abutment portions. The support portions are provided on the outer periphery and support the elastic member. The annular portions are provided on the inner periphery and function as the limiting portion. The abutment portions are provided radially between the multiple support portions and the annular portions and function as the stop portion.

[0014] In this configuration, the support member has an annular portion, and thus, by having the inner circumferential surface of the annular portion abut against other components, the support member can be positioned radially (centered). Therefore, no special positioning configuration is required, simplifying the overall structure of the device.

[0015] (3) Preferably, the circumferential length of each of the multiple support portions is longer than the circumferential length of the abutment portion. In this case, the elastic component can be supported more reliably.

[0016] (4) Preferably, the output component has an output-side support portion having a predetermined width in the axial direction. The inner circumferential end face of the annular portion of the support component is supported on the output-side support portion. In this case, it becomes easier to center the support component.

[0017] (5) Preferably, the output component has a circular plate portion and a plurality of engaging portions. The inner periphery of the circular plate portion is connected to the turbine, and the outer periphery is axially opposed to the limiting portion of the support component. The engaging portions extend radially outward from the circular plate portion and engage with the circumferential end of the elastic component. The inner periphery of the engaging portion can abut against the stop portion of the support component.

[0018] (6) Preferably, the input component has an input-side connecting portion, a receiving portion, and a opposing portion. The input-side connecting portion is connected to the clutch portion. The receiving portion receives multiple elastic members. The opposing portion is axially opposed to the limiting portion of the support member.

[0019] (7) Preferably, the opposite part of the input component extends from the inner periphery end of the input component toward the output component side, and the front end can abut against the output component.

[0020] In the present invention as described above, the locking device can reliably prevent the stop mechanism from disengaging. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of a torque converter having a locking device based on an embodiment of the present invention.

[0022] Figure 2 It is extracted Figure 1 The figure shows a locking device.

[0023] Figure 3 This is a perspective view of a damping section based on an embodiment of the present invention.

[0024] Figure 4 This is a front view of a damping section based on an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1 Torque converter; 2 Front cover; 4 Locking device; 24 Clutch part; 28 Damping part; 45 Holding plate (an example of an input part); 46 Torsion spring (an example of an elastic part); 47 Driven plate (an example of an output part); 50 Support plate (an example of a support part); 51 Connecting part; 52 Limiting part; 53 Stopping part; 54 Support part; 451 Input side connecting part; 452 Storage part; 453 Opposing part; 471 Circular plate part; 472 Output side support part; 473 Engaging part. Detailed Implementation

[0027] Figure 1 This is a partial cross-sectional view of a torque converter 1 having a locking device 4 based on one embodiment of the present invention. Figure 1 The engine (not shown) is located on the left side of the image, and the transmission (not shown) is located on the right side. Furthermore, Figure 1The OO shown is the rotation axis of the torque converter 1 and the locking device 4. Furthermore, from this point on, the direction separating from the rotation axis will be designated as "radial," and the direction along the rotation axis will be designated as "axial."

[0028] [Overall structure of torque converter 1]

[0029] Torque converter 1 is a device used to transmit torque from the crankshaft (not shown) on the engine side to the input shaft of the transmission. For example... Figure 1 As shown, the torque converter 1 includes a front cover 2, a torque converter body 3, and a locking device 4.

[0030] The front cover 2 is a component fixed to the input side. The front cover 2 is a substantially circular plate-shaped component, having a circular plate portion 2a and an outer peripheral cylindrical portion 2b formed by protruding from the outer periphery of the circular plate portion 2a toward the transmission side.

[0031] [Torque Converter Main Body 3]

[0032] The torque converter body 3 includes an impeller 10, a turbine 11, and a stator 12. The impeller 10 has an impeller housing 15 that is welded to the outer peripheral cylindrical portion 2b of the front cover 2. The turbine 11 is disposed opposite to the impeller 10 in a fluid chamber. The turbine 11 has a turbine housing 16 that forms its outer contour. A turbine hub 17 is provided in the inner peripheral portion of the turbine housing 16. The turbine hub 17 has a hub 17a located at the center and a flange 17b extending radially outward from the outer peripheral portion of the hub 17a. The flange 17b is fixed to the inner peripheral portion of the turbine housing 16 by rivets 18. In addition, a spline hole 17c for engaging with the input shaft (not shown) of the transmission is formed in the inner peripheral portion of the hub 17a. The stator 12 is disposed between the impeller 10 and the inner peripheral portion of the turbine 11 to rectify the hydraulic oil returning from the turbine 11 to the impeller 10. The stator 12 is supported on a fixed shaft via a one-way clutch 20. In addition, a first thrust bearing 21 and a second thrust bearing 22 are respectively provided between the stator 12 and the impeller 10 and the turbine hub 17.

[0033] [Locking device 4]

[0034] like Figure 1 as well as Figure 2 As shown, the locking device 4 is disposed in the space between the front cover 2 and the torque converter body 3. The locking device 4 transmits the torque from the front cover 2 to the transmission-side components via the turbine 11 of the torque converter 1. The locking device 4 has a clutch section 24, a clutch working section 27 including a piston 25, and a damping section 28.

[0035] <Clutch Section 24>

[0036] like Figure 1 as well as Figure 2 As shown, the clutch unit 24 is disposed between the front cover 2 and the turbine 11. The clutch unit 24 transmits or disconnects torque.

[0037] The clutch section 24 is a multi-plate clutch. The clutch section 24 has an inner peripheral drum 30, an outer peripheral drum 31, a plurality of first clutch plates 32 and second clutch plates 33.

[0038] The inner circumferential drum 30 has a fixing part 30a and an inner circumferential cylindrical part 30b. The fixing part 30a is formed into a ring shape from a circular plate and is fixed to the side of the front cover 2 by welding. The inner circumferential cylindrical part 30b is formed by bending the outer circumferential part of the fixing part 30a toward the turbine 11. Multiple grooves are formed in the inner circumferential cylindrical part 30b at predetermined intervals.

[0039] The outer peripheral drum 31 has a connecting portion 31a and an outer peripheral cylindrical portion 31b. The connecting portion 31a is formed into an annular shape from a circular plate. The outer peripheral cylindrical portion 31b is formed by bending the inner peripheral portion of the connecting portion 31a towards the front cover body 2. The outer peripheral cylindrical portion 31b is positioned radially opposite to the inner peripheral cylindrical portion 30b of the inner peripheral drum 30. A plurality of grooves are formed in the outer peripheral cylindrical portion 31b at predetermined intervals in the circumferential direction.

[0040] Multiple first clutch plates 32 and second clutch plates 33 are formed in a circular plate shape and are alternately arranged in the axial direction. Multiple teeth are formed on the inner circumference of the first clutch plate 32, which slide freely into grooves in the inner cylindrical portion 30b of the inner circumferential drum 30. Therefore, the first clutch plate 32 cannot rotate relative to the inner circumferential drum 30 and can move freely in the axial direction. Furthermore, friction material is fixed to both sides of the second clutch plate 33. Multiple teeth are formed on the outer circumference of the second clutch plate 33, which slide freely into grooves in the outer cylindrical portion 31b of the outer circumferential drum 31. Therefore, the second clutch plate 33 cannot rotate relative to the outer circumferential drum 31 and can move freely in the axial direction.

[0041] <Clutch Action Section 27>

[0042] The clutch working part 27 is a mechanism for setting the clutch part 24 to open (lock-on state, i.e., power transmission state) or closed (lock-off state, i.e., power transmission release state), and has a piston 25, a sleeve 35 and an oil chamber plate 36.

[0043] -Piston 25-

[0044] The piston 25 is formed in an annular shape and is disposed on the transmission side of the front cover 2. The piston 25 is axially movable and supported by the sleeve 35.

[0045] The piston 25 has a circular plate portion 25a, an inner cylindrical portion 25b, and an outer cylindrical portion 25c. The outer peripheral portion of the circular plate portion 25a bulges towards the front cover 2, and can press against the first clutch plate 32 of the clutch portion 24. The inner cylindrical portion 25b protrudes from the inner peripheral end of the circular plate portion 25a towards the front cover 2. The outer cylindrical portion 25c protrudes from the outer peripheral end of the circular plate portion 25a towards the turbine 11.

[0046] -Sleeve 35-

[0047] The sleeve 35 is a component that extends axially and has a space at its center. The engine side of the sleeve 35 is inserted into the inner circumferential opening Q of the front cover 2 and is fixed to the front cover 2 by welding. In addition, the sleeve 35 has a piston support portion 35a, a first mating portion 35b, and a first engaging portion 35c on the turbine 11 side of the front cover 2.

[0048] The piston support portion 35a supports the inner circumferential surface of the piston 25 on its outer circumferential surface, allowing it to move freely in the axial direction. The first mating portion 35b is formed in an annular shape on the outer circumferential surface of the piston support portion 35a on the turbine 11 side. The first engaging portion 35c is formed adjacent to the first mating portion 35b on the piston support portion 35a side. The first engaging portion 35c is annular and has a diameter smaller than that of the first mating portion 35b. That is, a step is formed between the first mating portion 35b and the first engaging portion 35c.

[0049] -Oil chamber plate 36-

[0050] The oil chamber plate 36 is circular. It is positioned between the piston 25 and the turbine 11. Between the oil chamber plate 36 and the piston 25, an oil chamber C supplied with hydraulic oil is formed. A sealing member 38 is provided on the outer peripheral surface of the piston support portion 35a to seal between the piston support portion 35a and the inner peripheral cylindrical portion 25b of the piston 25. Furthermore, a sealing member 39 is provided on the outer peripheral surface of the oil chamber plate 36 to seal between the oil chamber plate 36 and the outer peripheral cylindrical portion 25c of the piston 25. These components constitute the sealed oil chamber C.

[0051] Here, the circular plate portion 25a of the piston 25 is provided with a plurality of recesses 25d recessed towards the front cover 2. In addition, the oil chamber plate 36 is provided with a plurality of protrusions 36a that engage with the recesses 25d of the piston 25. Therefore, the piston 25, the oil chamber plate 36, and even the front cover 2 cannot rotate relative to each other, but rotate together as a unit.

[0052] The oil chamber plate 36 has a second mating portion 36b and a second engaging portion 36c on its inner circumferential surface. The second mating portion 36b abuts against and is welded to the first mating portion 35b of the sleeve 35. The second engaging portion 36c is annular and is formed on the oil chamber side of the second mating portion 36b. The diameter of the second engaging portion 36c is smaller than that of the second mating portion 36b.

[0053] In this configuration, the sleeve 35 and the oil chamber plate 36 are butt-welded, so compared with welding based on other overlapping welding, the two parts 35 and 36 can be connected with less heat and fewer welds.

[0054] Furthermore, each mating part 35b, 36b has a first engaging part 35c and a second engaging part 36c with a diameter smaller than that of each mating part 35b, 36b on the oil chamber side, which engage these engaging parts 35c, 36c. Therefore, even if the oil pressure in the oil chamber C increases and the oil chamber plate 36 presses against the turbine 11 side, the second engaging part 36c of the oil chamber plate 36 is supported by the first engaging part 35c of the sleeve 35, which can maintain a high bonding strength between the sleeve 35 and the oil chamber plate 36.

[0055] -Fuel circuit-

[0056] The sleeve 35 has a first oil passage P1 and a second oil passage P2.

[0057] The first oil passage P1 connects the inner circumference of the sleeve 35 to the oil chamber C. The radially outer opening of the first oil passage P1 is formed between the outer circumferential surface of the piston support portion 35a and the first mating portion 35b in the axial direction. Here, the opening of the first oil passage P1 is provided between the piston support portion 35a and the first mating portion 35b in the axial direction. That is, the piston support portion 35a, which requires high precision on its outer circumferential surface, and the welded (i.e., heated) first mating portion 35b are separated axially. Therefore, it is possible to suppress the thermal impact on the outer circumferential surface of the piston support portion 35a (i.e., the piston support surface) and prevent a decrease in precision.

[0058] The second oil passage P2 connects the inner circumference of the sleeve 35 with the space between the front cover 2 and the piston 25.

[0059] <Damping Section 28>

[0060] The damping section 28 is disposed on the outer peripheral side of the locking device 4. The damping section 28 transmits the torque from the clutch section 24 to the turbine 11 and absorbs or dampens torsional vibrations.

[0061] like Figures 1-4 As shown, the damping part 28 includes: a retaining plate 45 (an example of an input member) fixed to the connecting part 31a of the outer peripheral drum 31; a plurality of torsion springs 46 (an example of an elastic member); a driven plate 47 (an example of an output member); and a support plate 50 (an example of a support member).

[0062] -Retaining plate 45 (input component)-

[0063] The retaining plate 45 is formed in the shape of a circular plate. The retaining plate 45 is disposed axially between the front cover 2 and the driven plate 47. The retaining plate 45 is connected to the clutch part 24. The retaining plate 45 supports a plurality of torsion springs 46 in the axial and radial directions, and engages with the plurality of torsion springs 46 in the rotational direction.

[0064] The retaining plate 45 has an input-side connecting part 451, a storage part 452, and a corresponding part 453.

[0065] The input-side connecting part 451 is the inner circumferential side of the retaining plate 45. The input-side connecting part 451 is fixed to the connecting part 31a of the clutch part 24 by rivets 19.

[0066] Multiple storage portions 452 have a C-shaped cross-section that bulges outwards towards the front cover 2. The storage portions 452 extend further outwards from the outer periphery of the input-side connecting portion 451. The multiple storage portions 452 are arranged circumferentially and house a torsion spring 46 internally. In this embodiment, the number of storage portions 452 is three.

[0067] The opposing portion 453 is formed by extending from the end of the inner peripheral side of the input side connecting portion 451 toward the turbine 11 side, and its front end can abut against the driven plate 47.

[0068] -Driven plate 47 (output component)-

[0069] The driven plate 47 is roughly circular and can rotate relative to the retaining plate 45.

[0070] The driven plate 47 has a circular plate portion 471, an output side support portion 472, and multiple engaging portions 473.

[0071] The inner periphery of the circular plate portion 471 is fixed to the outer periphery of the turbine housing 16 and the turbine hub 17 of the turbine 11 by rivets 18.

[0072] The output-side support portion 472 is formed in the radial middle portion of the circular plate portion 471, and is cylindrical in the axial direction with a predetermined width.

[0073] Multiple engaging portions 473 extend radially outward from the outer peripheral end of the circular plate portion 471. The outer peripheral portion of the engaging portion 473 is bent toward the retaining plate 45. This bent portion engages with the end face of the torsion spring 46.

[0074] -Torsion Spring 46 (Elastic Component)-

[0075] Multiple torsion springs 46 are housed in the housing portion 452 of the retaining plate 45. In this embodiment, the number of torsion springs 46 is three.

[0076] The torsion spring 46 elastically connects the retaining plate 45 and the driven plate 47 in the rotational direction.

[0077] The circumferential end of the torsion spring 46 engages with the outer periphery of the engaging portion 473 of the driven plate 47.

[0078] -Support Board 50 (Support Components)-

[0079] The support plate 50 is generally circular and has multiple connecting parts 51 (supporting parts), limiting parts 52 (ring-shaped parts), and multiple stopping parts 53 (abutting parts).

[0080] Multiple connecting parts 51 are disposed axially between the retaining plate 45 and the driven plate 47. Each connecting part 51 is connected to the retaining plate 45 by a rivet 19.

[0081] The limiting portion 52 is formed in an annular shape and is disposed between the driven plate 47 and the turbine 11. The limiting portion 52 is provided such that it clamps the driven plate 47 axially with a portion of the retaining plate 45. The limiting portion 52 and the opposing portion 453 of the retaining plate 45 are axially opposed. In addition, the inner peripheral end face of the limiting portion 52 is supported on the output side support portion 472 of the driven plate 47. Thus, the support plate 50 is radially positioned by the driven plate 47.

[0082] A stop portion 53 is configured to connect and link multiple connecting portions 51 and limiting portions 52. The circumferential length of the stop portion 53 is shorter than the circumferential length of the connecting portions 51. More specifically, the stop portion 53 extends axially toward the turbine 11 from the radially inner end of the connecting portion 51. The limiting portion 52 extends radially inward from the turbine 11 end of the stop portion 53 axially. The stop portion 53 is the portion where the support plate 50 and the driven plate 47 intersect axially.

[0083] The stop portion 53 can abut against the inner circumference of the engaging portion 473 of the driven plate 47 (more specifically, the circumferential end face of the engaging portion 473). The stop portion 53 prevents the retaining plate 45 from rotating relative to the driven plate 47 to an angle greater than a specified angle.

[0084] The support plate 50 also has a plurality of support portions 54. The support portions 54 are provided on the outer periphery of the connecting portion 51. The support portion 54 is the portion where the outer periphery of the connecting portion 51 is bent toward the turbine 11. The support portion 54 supports the inner peripheral surface of the torsion spring 46. In this embodiment, the number of support portions 54 is three.

[0085] The circumferential length of each of the plurality of support portions 54, as described above, is longer than the circumferential length of the stop portion 53. The circumferential length of each of the plurality of support portions 54 is more than 30% of the circumferential length of the elastic member.

[0086] [action]

[0087] First, the operation of the torque converter body 3 will be explained. With the front cover 2 and impeller 10 rotating, hydraulic oil flows from impeller 10 to turbine 11, and further via stator 12 to impeller 10. Thus, torque is transmitted from impeller 10 to turbine 11 via hydraulic oil. The torque transmitted to turbine 11 is then transmitted to the input shaft of the transmission via turbine hub 17.

[0088] When the speed ratio of the torque converter 1 increases and the input shaft reaches a certain rotational speed, hydraulic oil is supplied to the oil chamber C via the first oil passage P1. Additionally, hydraulic oil in the space between the front cover 2 and the piston 25 is discharged via the second oil passage P2. As a result, the piston 25 moves towards the front cover 2. Consequently, the pressing part of the piston 25 presses against the side of the front cover 2, pressing against the first clutch plate 32 and the second clutch plate 33, thus locking the clutch in a locked state (clutch engaged state).

[0089] In the clutch engaged state described above, torque is transmitted from the front cover 2 to the torque converter body 3 via the locking device 4. That is, the torque input to the front cover 2 is output to the turbine hub 17 via the clutch section 24 and the damping section 28 in the locking device 4. In this clutch engaged state, torque fluctuations are attenuated by the damping section 28 of the locking device 4.

[0090] [feature]

[0091] When the lock-up is switched from the locked state to the closed state (clutch closed state), oil chamber C is connected to the drain pipe. As a result, the hydraulic oil in oil chamber C is discharged via the first oil passage P1. Furthermore, piston 25 moves towards the turbine 11 side, and the pressure of piston 25 on the first clutch plate 32 and the second clutch plate 33 is released. This completes the clutch closed state.

[0092] In this locking device 4, the driven plate 47 is clamped by a pair of input-side components (holding plate 45 and support plate 50), which are designed to prevent axial relative movement. Furthermore, the support plate 50 and the driven plate 47 are brought into circumferential contact in the locking device 4, forming a stop mechanism to limit the torsional angle. That is, the stop mechanism is formed by the support plate 50 and the driven plate 47, which are unable to move axially relative to each other. Therefore, the problem of engagement and disengagement of the pawl and engagement hole (disengagement of the stop mechanism) in existing stop mechanisms is eliminated.

[0093] [Other Implementation Methods]

[0094] The present invention is not limited to the embodiments described above, and various modifications or alterations can be made without departing from the scope of the present invention.

[0095] (a) In the above embodiment, the support plate 50 and the retaining plate 45 are configured to be unable to move relative to each other in the axial direction, and a stop mechanism is formed by these plates. However, the components on the input side are not limited to the support plate 50, and the components on the output side are not limited to the retaining plate 45. As long as the components on the input side and the components on the output side are configured to be unable to move relative to each other in the axial direction, and a stop mechanism is formed by these, the same effect as in the above embodiment can be obtained.

[0096] (b) The configuration of the stop portion 53 of the support plate 50 is not limited to the above-described embodiment. For example, the stop portion 53 may be formed by bending a portion of the support plate 50 in the axial direction.

[0097] (c) The configuration of the clutch section 24 and the damping section 28 is not limited to the above-described embodiments. For example, the clutch section 24 can be a single-plate type, and the present invention can be applied in the same way. In addition, the present invention can also be applied in the locking device 4 without the damping section 28.

Claims

1. A locking device for a torque converter, used to transmit torque from a front cover to a component on the transmission side via a turbine of the torque converter, the locking device for the torque converter comprising: A clutch unit, disposed between the front cover and the turbine, is used to transmit or cut off torque; and The damping section transmits the torque from the clutch section to the turbine and absorbs or attenuates torsional vibrations. The damping part has: An input component is connected to the clutch unit; The output component is rotatable relative to the input component and is connected to the turbine; Multiple elastic components elastically connect the input component and the output component in the rotational direction; as well as The support component includes a connecting part, a limiting part, and a stopping part. The connecting part is connected to the input component. The limiting part is provided to clamp the output component axially with a portion of the input component. The stopping part is capable of abutting against the output component and preventing the input component and the output component from rotating relative to each other beyond a predetermined angle. The support component has: Multiple support portions are disposed on the outer periphery of the support member and support the elastic member; An annular portion, serving as the limiting portion, is disposed on the inner periphery of the supporting member; and As the abutting part of the stop portion, it is provided radially between the plurality of support portions and the annular portion.

2. The locking device for the torque converter according to claim 1, wherein, The circumferential length of each of the plurality of support portions is longer than the circumferential length of the abutment portion.

3. The locking device for the torque converter according to claim 1, wherein, The output component includes an output-side support portion having a predetermined width in the axial direction. The inner circumferential end face of the annular portion of the support component is supported by the output-side support portion.

4. The locking device for the torque converter according to claim 2, wherein, The output component includes an output-side support portion having a predetermined width in the axial direction. The inner circumferential end face of the annular portion of the support component is supported by the output-side support portion.

5. The locking device for the torque converter according to any one of claims 1 to 4, wherein, The output component has: The circular plate portion has an inner periphery connected to the turbine, and its outer periphery is axially opposite to the limiting portion of the support member. as well as Multiple engaging portions extend radially outward from the circular plate portion, the outer periphery of the multiple engaging portions engaging with the circumferential end of the elastic member, and the inner periphery of the multiple engaging portions abutting against the stop portion of the support member.

6. The locking device for a torque converter according to any one of claims 1 to 4, wherein, The input component has: The input-side connecting part is connected to the clutch part; A storage section for accommodating multiple of the aforementioned elastic components; and The opposing portion is axially opposite to the limiting portion of the supporting component.

7. The locking device for the torque converter according to claim 5, wherein, The input component has: The input-side connecting part is connected to the clutch part; A storage section for accommodating multiple of the aforementioned elastic components; and The opposing portion is axially opposite to the limiting portion of the supporting component.

8. The locking device for the torque converter according to claim 6, wherein, The opposing portion of the input component extends from the inner periphery of the input component toward the output component, and the front end of the opposing portion is capable of abutting against the output component.

9. The locking device for the torque converter according to claim 7, wherein, The opposing portion of the input component extends from the inner periphery of the input component toward the output component, and the front end of the opposing portion is capable of abutting against the output component.

10. A locking device for a torque converter, used to transmit torque from a front cover to a transmission-side component via a turbine of the torque converter, the locking device comprising: A clutch unit, disposed between the front cover and the turbine, is used to transmit or cut off torque; and The damping section transmits the torque from the clutch section to the turbine and absorbs or attenuates torsional vibrations. The damping part has: An input component is connected to the clutch unit; The output component is rotatable relative to the input component and is connected to the turbine; Multiple elastic components elastically connect the input component and the output component in the rotational direction; as well as The support component includes a connecting part, a limiting part, and a stopping part. The connecting part is connected to the input component. The limiting part is provided to clamp the output component axially with a portion of the input component. The stopping part is capable of abutting against the output component and preventing the input component and the output component from rotating relative to each other beyond a predetermined angle. The output component has: The circular plate portion has an inner periphery connected to the turbine, and its outer periphery is axially opposite to the limiting portion of the support member. as well as Multiple engaging portions extend radially outward from the circular plate portion, the outer periphery of the multiple engaging portions engaging with the circumferential end of the elastic member, and the inner periphery of the multiple engaging portions abutting against the stop portion of the support member.

11. A locking device for a torque converter, used to transmit torque from a front cover to a component on the transmission side via a turbine of the torque converter, the locking device for the torque converter comprising: A clutch unit, disposed between the front cover and the turbine, is used to transmit or cut off torque; and The damping section transmits the torque from the clutch section to the turbine and absorbs or attenuates torsional vibrations. The damping part has: An input component is connected to the clutch unit; The output component is rotatable relative to the input component and is connected to the turbine; Multiple elastic components elastically connect the input component and the output component in the rotational direction; as well as The support component includes a connecting part, a limiting part, and a stopping part. The connecting part is connected to the input component. The limiting part is provided to clamp the output component axially with a portion of the input component. The stopping part is capable of abutting against the output component and preventing the input component and the output component from rotating relative to each other beyond a predetermined angle. The input component has: The input-side connecting part is connected to the clutch part; A storage section for accommodating multiple of the aforementioned elastic components; and The opposing portion is axially opposite to the limiting portion of the supporting component.

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