JP2001248697A - V-belt type automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a V-belt type automatic transmission that can allow a thrust spring to be fixed without increases in cost and in part size. SOLUTION: A thrust spring 34 is bent at the end side of a drive plate 30 in a substantially right angle to form a locking portion 35L. The locking portion 35L is locked in a locking hole 36L cut in the drive plate 30. Between the end face of the thrust spring 34 and the drive plate 30, a step 41L is provided a distance T1 separated equal to the wire diameter d of the thrust spring 34 or the inward bend radius of the locking portion 35L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a V-belt type automatic transmission.

[0002]

2. Description of the Related Art For example, in a type of vehicle such as a scooter type vehicle which can be easily driven, an automatic transmission which is easy to operate is often used. In particular, the V-belt type automatic transmission has been used as a power transmission device for a long time, and a drive pulley and a driven pulley are connected by a single V-belt, and one face of each pulley is movable, and the V-belt is automatically driven. Is changed steplessly to change the speed ratio.

[0003] The V-belt type automatic transmission is characterized by providing a torque cam device.
When a high torque is required, such as when climbing a hill or accelerating, the pulley is automatically operated to perform a so-called kick-down, which immediately changes to a low speed gear ratio.

In order to improve and stabilize the kick down performance and stabilize the speed change characteristics, a thrust spring that presses the movable face of the driven pulley toward the fixed face is fixed so as not to rotate in the radial direction. There is one used as a torsion spring (for example, see Japanese Patent Application Laid-Open No. 5-60192).

FIG. 9 is a longitudinal sectional view of a conventional driven pulley showing an example of a method for fixing a spring.
FIG. 10 is a sectional view taken along line XX of FIG. As shown in FIGS. 9 and 10, a fixed face boss 103 is fitted on the outer peripheral surface of a drive shaft 102 disposed at the center of the driven pulley 101 so as to be rotatable in the circumferential direction. A dish-shaped fixed driven face 104 is fixed to the end. A sleeve-shaped movable face boss 105 is also fitted on the outer peripheral surface of the fixed face boss 104 so as to be slidable in the axial direction and rotatable in the circumferential direction. The movable driven face 106 is fixed. The movable driven face 106 and the fixed driven face 104 are arranged so as to face each other, and a thrust spring is provided between the back surface of the fixed portion of the movable driven face 106 and the drive plate 108 of the clutch mechanism 107 facing the back surface. The movable driven face 10 is provided by the elastic force of the thrust spring 109.
6 and the movable face boss 104 are constantly pressed and urged toward the fixed driven face 104 side.

[0006] Both ends of the thrust spring 109 are bent at substantially right angles to form the movable driven face 10.
6 are locked in a locking face 110 provided in the movable face boss 105 and the drive plate 108, respectively.

The bent portions at both ends of the thrust spring 109 have an inner bending radius R substantially equal to the wire diameter d of the thrust spring 109 from the viewpoint of strength maintenance and workability.
When d is given (see FIG. 10), a bent portion having substantially the same radius R is also formed in the locking hole 110 so that the bent portion is easily locked in the locking hole 110.

In order to prevent the bent portions at both ends of the thrust spring 109 from coming out of the locking holes 110 and to improve the accuracy of the locking position, a straight portion 111 is provided in the bent portion, and the straight portion 111 is formed. The locking holes 110 are to be locked.

[0009]

However, if the straight portions 111 are provided at the bent portions at both ends of the thrust spring 109, there is a possibility that the straight portions 111 may protrude outward from the locking holes 110. When the straight portion 111 protrudes from the locking hole 110 provided in the drive plate 108, the tightening tool 113 is used to tighten the hexagon nut 112 for fixing the drive plate 108 to the end of the fixed face boss 103.
Interferes with the straight portion 111 protruding from the locking hole 110 (see FIG. 11). Therefore, although not shown in detail, a spacer is interposed between the drive plate and the hexagonal nut, the outer diameter of the thrust spring is increased,
As shown in FIG. 12, a special nut 114 is used to tighten with a special tool 115. However, in any case, the cost is increased and the driven pulley 101 is enlarged, which is not preferable.

On the other hand, on the movable face boss 105 side, in the case of the driven pulley 101 for a medium / large displacement vehicle as shown in FIG. 9 and FIG. Zu) is large,
Also, in consideration of the durability of the belt, the faces 104 and 106 made of aluminum are fixed to the fixed face bosses 103 and 105 made of iron (Fe) with rivets 116. Even if the locking hole 110 is provided in the movable face boss 105, a sufficient space 117 for absorbing the linear portion 111 provided at the bent portion at the end of the thrust spring 109 can be ensured. It does not jump out.

However, in the case of a driven pulley 201 for a small displacement vehicle as shown in FIG. 13, the belt winding diameter 202 of the driven pulley 201 at the time of top is small, and the iron faces 203 and 204 are replaced with the iron face boss 205. , 206, so that
When the locking hole 207 is provided in the movable driven face 206, the straight portion 208 protrudes from the locking hole 207 to the inside of the movable driven face 206, so that a clearance 210 with the V-belt 209 must be secured. This locking hole 207 may reduce the strength of the movable driven face 206, which is not preferable.

Further, as shown in FIG. 14, a step 30 for forming a locking hole 302 is formed in the circumferential direction of the movable face boss 301.
Although there is a method of providing a face 3, the outer diameter of the face 304 becomes large, which is not suitable for a driven pulley for a small displacement vehicle.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a V-belt type automatic transmission capable of fixing a thrust spring while preventing an increase in cost and an increase in the size of parts. I do.

[0014]

In order to solve the above-mentioned problems, a V-belt type automatic transmission according to the present invention is fixed to an outer peripheral surface of a drive shaft which is an output shaft. A face boss is rotatably fitted in the circumferential direction, and a dish-shaped fixed driven face is fixed to one end of the fixed face boss, and a drive plate of a clutch mechanism is fixed to the other end, and the outer face of the fixed face boss is fixed. A sleeve-shaped movable face boss is fitted slidably in the axial direction and rotatably in the circumferential direction, and a dish-shaped movable driven face is fixed to a flange formed at an end of the movable face boss, The movable driven face and the fixed driven face are arranged to face each other, and the space between the back of the fixed portion of the movable driven face and the drive plate facing the back is provided. A V-belt type automatic transmission having a thrust spring, wherein the movable driven face and the movable face boss are constantly pressed and urged toward the fixed driven face by the elastic force of the thrust spring; The drive plate side end is bent at a substantially right angle to form a locking portion, the locking portion is locked in a locking hole provided in the drive plate, and the end face of the thrust spring and the drive plate are locked. And a stepped portion separated by a distance corresponding to the wire diameter of the thrust spring or the inside bending radius of the locking portion.

In order to solve the above-mentioned problem, an end portion of the thrust spring on the movable driven face side is bent at a substantially right angle to form an engaging portion. The thrust spring is engaged with an engagement hole provided in a flange of the movable face boss, and a wire diameter of the thrust spring or an inward bending of the engagement portion is provided between an end surface of the thrust spring and the flange of the movable face boss. A stepped portion is provided at a distance corresponding to a radius.

Further, in order to solve the above-mentioned problems,
As described in claim 3, a holder member is disposed between the end face of the thrust spring and the drive plate,
The step portion is formed on the holder member.

Further, in order to solve the above-mentioned problem, as described in claim 4, a holder member is disposed between an end face of the thrust spring and a flange of the movable face boss, and the holder member is provided with a holder member. The above-mentioned step is formed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan sectional view showing a first embodiment of a unit swing type engine used for a small vehicle such as a scooter to which the present invention is applied. The unit swing type engine 1 integrally includes, for example, an engine body 2 of a four-cycle air-cooled single cylinder, and a transmission case 3 extending rearward from one side of the engine body 2.

The engine body 2 is mainly composed of an engine case 4,
The reciprocating motion of the piston 7 in the cylinder block 5 is made up of the cylinder block 5 and the cylinder head 6, and rotates the crankshaft 9 extending in the vehicle width direction in the engine case 4 via the connecting rod 8.

The transmission case 3 extending rearward from one side of the engine body 2, in this embodiment, from the left side, forms a belt chamber 10 therein, and a V-belt type automatic transmission 11 is disposed in the belt chamber 10. .

A drive pulley 12 of a V-belt type automatic transmission 11 is attached to one end of the crank rank shaft 9. On the other hand, the driven pulley 13 is provided with a transmission mechanism 14 provided at the rear of the V-belt type automatic transmission 11.
Are rotatably supported by a drive shaft 15 which is an output shaft of the motor. In addition, these drive pulleys 12
A V belt 16 is stretched between the driven pulley 13 and the driven pulley 13, and the rotational driving force of the engine is transmitted to the driven pulley 13 via the V belt 16.

Further, the rotational driving force of the engine transmitted to the driven pulley 13 is transmitted to the drive shaft 15 via the centrifugal clutch mechanism 17. The drive shaft 15 is, for example, a drive gear 1 through a transmission mechanism 14 that is a reduction gear mechanism and a power transmission device.
8, the rotational driving force is transmitted.

FIG. 2 is an enlarged sectional view showing the first embodiment of the driven pulley 13 which constitutes a part of the V-belt type automatic transmission 11. As shown in FIGS. 1 and 2, a sleeve-shaped fixed face boss 20 made of iron (Fe) is rotatably fitted in a circumferential direction on the outer peripheral surface of the drive shaft 15 of the transmission mechanism 14 via a plurality of bearings 19. Dressed,
At the right end of the fixed face boss 20 in the figure, a dish-shaped fixed driven face 21 made of aluminum (Al) is provided.
Are fixed with, for example, rivets 22.

A sleeve-shaped iron movable face boss 23 is further fitted on the outer peripheral surface of the fixed face boss 20 so as to be slidable in the axial direction and rotatable in the circumferential direction. A flange 24 is formed radially at the right end of the movable face boss 23 in the figure, and a dish-shaped movable driven face 25 made of aluminum is fixed to the flange 24 with, for example, rivets 26. The movable driven face 25 and the fixed driven face 21 are arranged so as to face each other to form the driven pulley 13.

A U-shaped clutch housing 27 constituting the centrifugal clutch mechanism 17 is provided at the left end of the drive shaft 15 in the drawing, and a clutch lining 28 as a frictional engagement member is provided inside the side wall of the clutch housing 27. Is provided.

A clutch shoe 29 corresponding to the clutch lining 28 is provided on an outer peripheral edge of a drive plate 30 disposed in the clutch housing 27. The drive plate 30 is provided on the left end of the fixed face boss 20 in the drawing, for example. It is fixed and integrated with the nut 31.

On the other hand, the outer peripheral surface of the movable face boss 23 is covered by a movable holder 32 as a holder member. The end of the movable holder 32 on the movable driven face 25 side rises in the radial direction, and the fixed holder 33 is a holder member disposed in front of the drive plate 30 provided on the opposite side.
The movable driven face 25 and the movable face boss 23 by the elastic force of a thrust spring 34 disposed between
To the fixed driven face 21 side.

FIG. 3 is a sectional view taken along the line III-III in FIG. As shown in FIGS. 2 and 3, both ends of the thrust spring 34 are bent at substantially right angles to form locking portions 35L and 35R. Right locking part 3 in the figure
5R is locked by the movable holder 32, the flange 24 of the movable face boss 23 to which the movable driven face 25 is fixed, and the locking hole 36R provided at the base end of the movable driven face 25. In addition, the locking portion 3 on the left side in the drawing.
5L is locked in a locking hole 36L provided in the fixed holder 33 and the drive plate 30, and the thrust spring 34 is fixed so as not to rotate in the radial direction and used as a torsion spring.

A pin hole 37 is formed in the circumferential surface of the fixed face boss 20, and a base of the torque cam pin 38 is fitted therein. The movable face boss 23 is formed with a torque cam groove 39 which is engaged with a torque cam pin 38 and which is obliquely movable and has a long slot in the axial direction and is inclined in the circumferential direction.
The torque cam pin 38 and the torque cam groove 39 constitute a torque cam device 40. The opening of the torque cam groove 39 is covered by the movable holder 32.

FIG. 4 is a right side view of the fixed holder 33, and FIG. 5 is a sectional view taken along line VV of FIG. FIG.
As shown in FIGS. 4 and 5, the fixed holder 33 is a bottomed cylindrical member having an opening formed in the center thereof, and has an inner bending radius Rd () of the thrust spring left locking portion 35L on the bottom surface on the left side in the drawing. The movable driven face 25 side for a distance T1 corresponding to the wire diameter d of the thrust spring 34)
That is, a plurality of steps 41L, which are recessed to be separated from the right side, are formed in the circumferential direction, and three steps are formed in the present embodiment.
The locking hole 36L is formed in the bottom surface of the fixed holder 33 at a position avoiding these steps 41L. Then, the left end surface of the thrust spring 34 is positioned by these steps 41L.

FIG. 6 is an enlarged sectional view showing a second embodiment of the driven pulley 51 constituting a part of the V-belt type automatic transmission 11. The same components as those of the driven pulley 13 shown in the first embodiment are denoted by the same reference numerals.
As shown in FIG. 6, sleeve-like iron (Fe) is provided on the outer peripheral surface of the drive shaft 15 via a plurality of bearings 19.
A fixed face boss 20 made of metal is rotatably fitted in the circumferential direction, and a dish-shaped fixed driven face 52 made of iron (Fe) is welded to the right end of the fixed face boss 20 in the drawing.

A sleeve-shaped iron movable face boss 53 is further fitted on the outer peripheral surface of the fixed face boss 20 so as to be slidable in the axial direction and rotatable in the circumferential direction. A flange 54 is formed radially at the right end of the movable face boss 53 in the drawing, and an iron dish-shaped movable driven face 55 is press-fitted into the end of the movable face boss 53 at the flange 54, for example, by welding. Is done. The movable driven face 55 and the fixed driven face 52 are disposed so as to face each other, and the driven pulley 51
Is configured. The other structure is the same as that of the driven pulley 13 shown in the first embodiment, and the description is omitted.

Both ends of the thrust spring 34 are bent at substantially right angles to form locking portions 35L and 35R. The right locking portion 35R in the figure is locked in a locking hole 36R provided in the flange 54 of the movable face boss 53 to which the movable holder 56 and the movable driven face 55 are fixed. The locking portion 35L on the left side in the figure is locked by a locking hole 36L provided in the fixed holder 33 and the drive plate 30, and the thrust spring 34 is fixed so as not to rotate in the radial direction and the torsion spring 34 is fixed. Use as Note that the fixed holder is the same as the fixed holder 33 shown in the first embodiment, and a description thereof will be omitted.

FIG. 7 is a left side view of the movable holder 56, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. As shown in FIGS. 6, 7 and 8, the movable holder 56 has a double tube structure having a cylindrical portion having both ends opened at the center thereof. A plurality of steps 41R are formed in the circumferential direction in the drive plate 30 side, i.e., the left side of the drive plate 30 at a distance T2 corresponding to the inside bending radius (not shown). The locking hole 3
6R is the movable holder 5 at a position avoiding these steps 41R.
6 Drilled on the bottom. Then, the right end surface of the thrust spring 34 is positioned by these steps 41R.

Next, the operation of the present embodiment will be described.

The movable driven faces 25, 55 are fixed to the driven faces 21, 52 by the elastic force of the thrust spring 34 disposed between the movable face bosses 23, 53 of the driven pulleys 13, 51 and the drive plate 30 of the centrifugal clutch mechanism 17. By constantly pressing and biasing to the side,
The thrust force of the spring 34 is applied to the side surface of the stretched V-belt 16 to increase the diameter of the V-belt 16, that is, acts to reduce the speed.

The locking portions 35L, 35R formed at both ends of the thrust spring 34 are connected to the drive plate 30 of the centrifugal clutch mechanism 17 and the driven pulleys 13, 5, respectively.
By being fixed to the movable face bosses 23 and 53, respectively, and used as a torsion spring, the restoring force of the torsion assists the operation of the torque cam device 40, and the shift to the low speed range can be easily performed. As a result, automatic shifting from the high speed range to the low speed range is smoothed.

The fixed holder 33 of the thrust spring 34 disposed on the side of the centrifugal clutch mechanism 17 has a distance T corresponding to the inner bending radius Rd of the thrust spring left locking portion 35L.
A plurality of step portions 41L recessed and formed on the movable driven face side for one minute are formed in the circumferential direction at a plurality of positions, and these step portions 41L are formed.
By positioning the left end surface of the thrust spring 34, the left locking portion 35L of the thrust spring 34 does not protrude from the locking hole 36L of the drive plate 30. As a result, when the nut 31 for fixing the drive plate 30 to the end of the fixed face boss 20 is tightened, the tightening tool does not interfere with the left end of the thrust spring 34, so that the conventionally used special nut or special tool is unnecessary. And cost can be reduced.

A locking hole 36 is formed in the flange 54 of the movable face boss 53 to which the movable driven face 55 is fixed.
R is provided, and is recessed in the movable holder 56 of the thrust spring 34 disposed on the movable driven face 55 side, away from the movable drive plate 30 by a distance T2 equivalent to the inside bending radius of the thrust spring right engagement portion 35R. The movable driven face 5 is formed by forming a plurality of stepped portions 41R in the circumferential direction and positioning the right end surface of the thrust spring 34 by these stepped portions 41R.
5 does not need to be provided with a locking hole. As a result, securing the clearance with the V-belt 16 as in the related art is not considered, and the strength of the movable driven face 55 is not reduced. Further, since there is no step in the circumferential direction of the movable face boss 53 for forming the locking hole, the driven pulley 51
The outer diameter does not increase.

When the movable driven face 55 is press-fitted into the movable face boss 53, there is no need to position the locking hole 36R and the torque cam groove 39, and the workability is improved.

In the embodiment described above, the end face of the thrust spring 34 and the movable face bosses 23, 53
The movable holders 32, 56 and the fixed holder 33 as holder members disposed between the flanges 24, 54 and between the end face of the thrust spring 34 and the drive plate 30 by a distance corresponding to the wire diameter d of the thrust spring 34. Although the example in which the stepped portions 41L and 41R which are recessed and spaced apart are provided is shown, the flange 2 of the movable face bosses 23 and 53
A step may be provided directly on the surface of the drive plate 30 facing the thrust spring 34 (not shown). However, the use of the movable holders 32, 56 and the fixed holder 33 is structurally simpler, and has the advantage that it can be easily retrofitted to a conventional model.

[0043]

As described above, according to the V-belt type automatic transmission according to the present invention, the fixed face boss is rotatably fitted in the outer peripheral surface of the drive shaft as the output shaft in the circumferential direction. A dish-shaped fixed driven face is fixed to one end of the fixed face boss, and a drive plate of a clutch mechanism is fixed to the other end, and a sleeve-shaped movable face boss is slidable in the axial direction on the outer peripheral surface of the fixed face boss.
The movable driven face is fixed to a flange formed at an end of the movable face boss, and the movable driven face and the fixed driven face are arranged to face each other. A thrust spring is provided between the fixed portion rear surface of the movable driven face and the drive plate facing the rear surface,
In the V-belt type automatic transmission having a driven pulley in which the movable driven face and the movable face boss are constantly pressed and urged toward the fixed driven face by the elastic force of the thrust spring, the drive plate side of the thrust spring An end portion is bent at a substantially right angle to form a locking portion. The locking portion is locked in a locking hole provided in the drive plate, and the locking portion is provided between an end surface of the thrust spring and the drive plate. Since the stepped portion is separated by a distance equivalent to the wire diameter of the thrust spring or the inside bending radius of the locking portion, the locking portion of the thrust spring does not protrude from the locking hole of the drive plate, and general nuts and tools Can be used,
Cost reduction can be achieved.

The end of the thrust spring on the movable driven face side is bent at a substantially right angle to form a locking portion, and the locking portion is locked in a locking hole provided in a flange of the movable face boss. In addition, a step portion is provided between the end face of the thrust spring and the flange of the movable face boss by a distance corresponding to a wire diameter of the thrust spring or an inner bending radius of the locking portion,
It is not necessary to provide a locking hole in the movable driven face, so that a reduction in strength can be prevented and the driven pulley can be made compact.

Further, since a holder member is disposed between the end face of the thrust spring and the drive plate, and the step portion is formed on the holder member, the structure is simplified,
In addition, it can easily cope with conventional models.

Further, since a holder member is arranged between the end face of the thrust spring and the flange of the movable face boss, and the step portion is formed on the holder member, the structure is simplified, and the conventional model is also used. Can be easily handled.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a unit swing type engine showing a first embodiment of a V-belt type automatic transmission according to the present invention.

FIG. 2 is an enlarged sectional view showing a first embodiment of a driven pulley that constitutes a part of the V-belt type automatic transmission.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a right side view of the fixing holder.

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is an enlarged sectional view showing a second embodiment of a driven pulley that constitutes a part of the V-belt type automatic transmission.

FIG. 7 is a left side view of the movable holder.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a longitudinal sectional view of a conventional driven pulley showing an example of a method of fixing a spring.

FIG. 10 is a sectional view taken along the line XX in FIG. 9;

FIG. 11 is a view as viewed in the direction of the arrow XI in FIG. 9;

FIG. 12 is a view taken in the direction of arrow XII in FIG. 9;

FIG. 13 is a longitudinal sectional view of a conventional driven pulley for a small displacement vehicle, showing an example of a method of fixing a spring.

FIG. 14 is a view showing another example of the method of fixing the spring shown in FIG. 13;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Unit swing type engine 11 V belt type automatic transmission 13,51 Driven pulley 15 Drive shaft 17 Clutch mechanism 20 Fixed face boss 21,52 Fixed driven face 23,53 Movable face boss 24,54 Flange 25,55 Movable driven face 30 Drive plate 32, 56 Movable holder (holder member) 33 Fixed holder (holder member) 34 Thrust spring 35L, 35R Locking portion 36L, 36R Locking hole 40 Torque cam device 41L, 41R Step Rd Inside bending radius of locking portion T1 , T2 Distance corresponding to the wire diameter of the thrust spring or the inside bending radius of the locking part d Wire diameter of the thrust spring

Claims (4)

[Claims] 1. A fixed face boss is rotatably fitted in a circumferential direction on an outer peripheral surface of a drive shaft serving as an output shaft, a dish-shaped fixed driven face is provided at one end of the fixed face boss, and a clutch mechanism is provided at the other end. And a sleeve-shaped movable face boss is fitted on the outer peripheral surface of the fixed face boss so as to be slidable in the axial direction and rotatable in the circumferential direction, and to the end of the movable face boss. While the dish-shaped movable driven face is fixed to the formed flange, the movable driven face and the fixed driven face are arranged to face each other, and the fixed part back surface of the movable driven face, and the drive plate facing the rear face, Between the movable driven face and the movable face boss by the elastic force of the thrust spring. In the V-belt type automatic transmission having a driven pulley constantly pressed and urged toward the fixed driven face, an end of the thrust spring 34 on the drive plate 30 side is bent at a substantially right angle to form a locking portion 35L. Then, the locking portion 35L is locked in a locking hole 36L provided in the drive plate 30, and the wire diameter d of the thrust spring 34 or the distance d between the end face of the thrust spring 34 and the drive plate 30. A V-belt type automatic transmission having a stepped portion 41L separated by a distance T1 corresponding to an inner bending radius Rd of the locking portion 35L. 2. A fixed face boss is fitted on an outer peripheral surface of a drive shaft as an output shaft so as to be rotatable in a circumferential direction. A fixed driven face having a dish shape is provided at one end of the fixed face boss, and a clutch mechanism is provided at the other end. And a sleeve-shaped movable face boss is fitted on the outer peripheral surface of the fixed face boss so as to be slidable in the axial direction and rotatable in the circumferential direction, and to the end of the movable face boss. While the dish-shaped movable driven face is fixed to the formed flange, the movable driven face and the fixed driven face are arranged to face each other, and the fixed part back surface of the movable driven face, and the drive plate facing the rear face, Between the movable driven face and the movable face boss by the elastic force of the thrust spring. In a V-belt type automatic transmission having a driven pulley constantly pressed and urged toward the fixed driven face, an end of the thrust spring 34 on the side of the movable driven face 55 is bent substantially at a right angle to form the locking portion 35R. The locking portion 35R is formed in the locking hole 3 provided in the flange 54 of the movable face boss 53.
6R and the thrust spring 34
And a step portion 41R separated by a distance T2 corresponding to the wire diameter d of the thrust spring 34 or the inner bending radius Rd of the locking portion 35R between the end face of the movable face boss 53 and the flange 54 of the movable face boss 53. V-belt type automatic transmission. 3. A V-belt type automatic transmission according to claim 1, wherein a holder member is disposed between an end surface of said thrust spring and said drive plate, and said step portion is formed on said holder member. . 4. A holder member 56 is disposed between an end surface of the thrust spring 34 and a flange 54 of the movable face boss 53.
The V-belt type automatic transmission according to claim 2, wherein R is formed.