JPH01250651A - Belt type continuously variable transmission - Google Patents

Abstract

PURPOSE:To simplify the construction by accomodating a steel ball capable of freely moving in a space portion formed on the back of a movable pulley piece of an input shaft, and providing cam pieces having an inclined face on the respective extended cylindrical portions of a movable pulley piece and a stopper disposed on an output shaft to form a torque transmitting portion. CONSTITUTION:A centrifugal force applying member 10, for example, a steel ball, capable of freely moving is accomodated in a space portion 9 formed by inner and outer extended portions 7a, 7b projected on the back of a movable pulley piece 4 of an input shaft 1 and a fixed piece 8. On the other hand, on an output shaft 2, a cylindrical cam piece 16 mounted on a boss portion 15 of a movable pulley piece 13 and a cylindrical cam piece 18 mounted on a stopper 17 fixed to a shaft 14 are engaged with each other, whereby a torque transmitting portion 19 with a cam mechanism can be formed by both cam pieces 16, 18. The torque transmitting portion 19 is constructed so that the tooth portions of the respective cam pieces 16, 18 engage with each other at an inclined face thereof, and when the movable pulley 13 is rotated, torque is transmitted to the outer shaft 2, and the axial component force produced by the above engagement given efficient thrust to the movable pulley piece 13.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a belt-type continuously variable transmission, and is particularly used for a continuously variable transmission of a vehicle body such as an automobile. This belt-type continuously variable transmission device is capable of automatically adjusting a predetermined gear ratio in a timely manner by changing the force with which the combined belt is pressed by the movable pulley piece, that is, the thrust, according to the speed and load conditions of the vehicle body. be.

(Prior Art) Today, in belt-type continuously variable transmission devices for motorcycles, automobiles, etc., a fixed pulley piece and a movable pulley piece are attached to an input shaft and an output shaft, respectively, which are arranged in parallel. A variable speed pulley is used in which seven belts are suspended in a V-groove, and each movable pulley piece generates thrust to press the belt, and the thrust is generally generated by hydraulic pressure or spring force.

Among these devices, the device that generates thrust using hydraulic pressure has a hydraulic cylinder installed on the back of each movable pulley piece, and the amount of oil supplied into this cylinder is controlled by an electronic control device. (For example, see US Pat. No. 4,601,680.) On the other hand, as another means for generating thrust, pulleys in which movable pulley pieces are moved by springs are also widely used.

(Problem to be solved by the invention) However, in the transmission using the hydraulic system described above, the amount of oil is controlled by an electronic control device, so the amount of data taken in by the electronic control device is large (and therefore, a large number of sensors are required). Since it has to be installed, there is a problem that the device becomes expensive and has a complicated structure.

On the other hand, in a transmission device that uses spring-based speed change pulleys on the input and output shafts, it is difficult to generate thrust in the movable pulley pieces depending on the speed and load of the vehicle body, and the belt windings on the input and output shafts are difficult to generate. There was a problem that the diameter of the hook did not change sensitively.

The present invention focuses on and improves the above-mentioned problems, and in particular aims to propose a transmission system that can replace the hydraulic system, and is intended to improve the speed of the vehicle body of motorcycles and automobiles, and the load applied to the vehicle body. To provide a belt-type continuously variable transmission device that can sensitively change the thrust of a movable pulley piece of a speed change pulley in response to changes in the speed change pulley, and can timely adjust the diameter of the belts on the input side and the output side. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a fixed pulley piece on the input shaft and the output shaft, and a movable pulley piece that is slidable in the longitudinal direction on the shaft in opposition to the pulley piece. In a belt-type continuously variable transmission device in which a power transmission belt is hung in a ■-shaped groove formed by these two pulley pieces, a belt is attached to the back of the movable pulley piece disposed on the input shaft on the shaft behind the back. A space is formed by the fixedly arranged fixed piece and the inner and outer extending parts protruding from the back surface of the movable pulley piece, and a freely movable rigid ball is accommodated in this space, and the ball is rotated according to the rotation speed of the input shaft. A thrust force is applied to the movable pulley piece, and a cam piece having an inclined surface is provided on the extended cylindrical portion of the movable pulley piece and the stopper disposed on the other output shaft, and the cam pieces are brought into contact and engagement with each other to generate a cam. It is characterized by a structure in which a torque transmission section with a mechanism is provided.

According to the present invention, the variable speed pulley disposed on the input shaft includes a fixed piece fixedly arranged on the shaft behind the back of the movable pulley piece, and a fixed piece that extends outwardly and outwardly protruding from the back of the movable pulley piece. A space is formed by the part, and a rigid ball such as a freely movable steel ball is housed in this space, and a cam piece fixed to the inner extension part and another cam that engages with the cam piece are further provided. It also includes a torque transmission section with a cam mechanism in which the pieces are brought into contact engagement.

Furthermore, the present invention includes a speed change pulley disposed on the output shaft having the following two structures. That is,
One of them is to provide a cam piece on the back boss part of the movable pulley piece of the speed change pulley, fix another cam piece that meshes with the cam piece, and provide a torque transmission part with a cam mechanism. A hydraulic cylinder part is formed by an extending part protruding from the back of the piece and a cylindrical body fixed on the axis behind this back.

The other method is to provide a cam piece on the back boss of the movable pulley piece of the speed change pulley, and fix the position of the other cam piece that meshes with this to connect the torque transmission part with the cam mechanism to the speed change pulley on the output shaft side. A hydraulic cylinder part is formed by the back part of the movable pulley piece and a cylindrical body fixed on the shaft behind the back part, and a coil spring is further interposed between the back part of the movable pulley piece and the cylindrical body. This configuration is such that the movable pulley piece is pressed against one side of the fixed pulley.

(Function) According to the device of the present invention, when the vehicle body is started, the centrifugal force of the steel balls is small on the input side, and therefore the thrust of the movable pulley piece is small, and a large starting torque is applied on the force output side. The thrust of the movable pulley piece increases due to the action of the torque transmitting part with the cam mechanism, and as a result, the belt wraps around the output shaft to a state where the diameter becomes larger, thereby reliably moving the vehicle body.

As the rotational speed of the input shaft increases, the centrifugal force of the steel balls on the input shaft increases, the thrust of the movable pulley piece increases, and on the other hand, the load on the vehicle body decreases, and the belt does not wrap around the output shaft. The vehicle speed increases by shifting to a state where the diameter is slightly smaller.

Furthermore, when the vehicle body is rapidly accelerated, the load applied to the vehicle body increases, and the thrust of the movable pulley piece increases due to the action of the torque transmission section with a cam mechanism on the output side, causing the vehicle body to shift to the deceleration side.

In this way, the diameter of the belt wrapped around the input shaft and output shaft is automatically determined by the balance between the centrifugal thrust of the movable pulley piece due to the rotational speed of the input shaft and the cam thrust generated by the torque applied to the output shaft.

Therefore, when the above system is used as a continuously variable transmission system for an automobile, when the clutch is turned on and the engine speed increases while the engine is idling, the input speed pulley is fixed due to the large starting torque. It starts working, the vehicle speed increases to a certain extent,
When the torque of the output speed change pulley decreases, the cam thrust decreases and the centrifugal thrust of the input speed change pulley becomes relatively thick (
By controlling these factors, it is possible to use the car's engine characteristics in an ideal manner.

(Embodiment) An embodiment of the transmission device of the present invention will be further described based on FIG. 1 showing its basic configuration. V+)
, (Vc), and both pulleys (V+), (V2
), in which the input side speed change pulley (V, ) and the output side speed change pulley (v2) are provided with speed change pulleys having the following configurations.

That is, in the speed change pulley (vl) on the input side, a fixed pulley piece (3) is fitted and fixed to a spline provided thereon, and a movable pulley piece (4) opposite to this is attached to the fixed pulley. It is fitted into a spline or key (6) provided on the sheave shaft (5) of one piece, and both pulley pieces f
3), (41 forms a V-shaped groove in which a power transmission belt, ie, a V-bell) (B) is hung.

The movable pulley piece (4) is installed so as to be movable in the longitudinal direction of the sheave shaft (5) of the fixed pulley piece, and the back of the movable pulley piece (4) has a protruding inner and outer extending portion. (7a) and (7b) are provided, and a fixing piece (8) is also provided on the rear axis of the back to connect the inner and outer extending portions (7a) and (7b) and the fixed fixing piece (8). 8
) forms a space (9), and a freely movable centrifugal force imparting member 00, for example a rigid ball such as a steel ball, is housed in the space (9). This centrifugal force imparting material 0ω is approximately φ
The steel ball has a diameter of about 2.5 cranes, and occupies approximately 60 to 100% of the volume of the space (9).

On the other hand, in the variable speed pulley (v2) attached to the output shaft (2), the fixed pulley piece 0 is attached to the output shaft (2).
is inserted and fixed with a bolt, and the movable pulley piece 0 is opposite to the sheave shaft Cl of the fixed pulley piece.
4) is slidably fitted.

Then, a cylindrical cam piece 06) provided on the boss part 09 of the movable pulley piece 0 and a stopper 07 fixed to the shaft 04)
) are engaged with the cylindrical cam piece 0 and both cam pieces a
0. A torque transmission section with a cam mechanism is formed by αυ.

In the torque transmission part 0ω, the teeth of each cam piece 0ω, 08) engage with each other on their inclined surfaces, and when the movable pulley piece 03) rotates, torque is transmitted to the output shaft (2), and from this engagement. The generated axial component force provides efficient thrust to the movable pulley piece 0.

Furthermore, in addition to the above, as an auxiliary means for applying thrust to the movable pulley piece 0, in FIG. A coil spring (2ω) is provided that acts in the direction that the groove is compressed.

Thus, the input side speed change pulley (V,
) and the output side speed change pulley (v2) to transmit power from the speed change pulley (vl) to the speed change pulley (v2) via the belt (B). A transmission device is constructed.

In addition, the centrifugal force imparting material 00 used for the input side speed change pulley (vl) in the above configuration is most commonly a ball such as the steel ball mentioned above, but other materials such as an irregularly shaped material, a square material,
Powders can also be used alone or in combination of two or more.

Fig. 2 shows another modified embodiment of the transmission device of the present invention, in which the input shaft speed change pulley (V) has fixed pulley pieces (3
) is fitted and fixed in the spline, and on the other hand, on the other hand, a movable pulley piece (4) is fitted in the sheave shaft (5) of the fixed sheave piece, and the movable pulley piece (4) is fitted with the same as in Fig. 1. The inner and outer extending parts (7a) and (7b) and the fixing piece (8
) in the space (9) formed by the centrifugal force imparting material α
φ is filled, but the inner extending portion of the movable pulley piece (
A cylindrical cam piece (22) is fixed to 7a) by a bolt, and another cylindrical cam piece (23) that meshes with this cam piece (22) is fixed to the shaft (5) so that both cam pieces ( 22)
, (23) Torque transmission unit with cam mechanism (24
) is provided.

However, the thrust generated by the torque transmitting portion (24) acts in a direction that moves the movable pulley piece (4) away from the fixed pulley piece (3).

That is, this torque transmission section (24) is the same as that provided on the movable pulley piece (4) on the input shaft in FIG.
As shown in Fig. 3, the teeth (25) of the cylindrical cam piece (22) fixed to the inner extension part (7a) and the teeth of the cylindrical cam piece (23) fixed to the input shaft (5). The tooth portion (26) is in contact with the inclined surface (27) provided on the tooth portion.

On the other hand, in the other gearbox IJ (V2) attached to the output shaft, there is a cylindrical cam piece 0[i] provided on the boss portion 0';J of the movable pulley piece and a cylindrical cam piece (28 )
The two mesh with each other to form a torque transmitting section (29) with a cam mechanism, and as a means for assisting the thrust generated by this torque transmitting section (29), an externally extending section (30) of the movable pulley piece is provided.
and a cylindrical body (31) fixed to the rear shaft of the pulley piece.
) from which a hydraulic cylinder part (32) is formed and arranged.

That is, in the transmission shown in FIG. 2, the thrust of the movable pulley piece (vl) of the input shaft (11) is generated by the centrifugal thrust by the centrifugal force imparting material and the thrust by the torque transmission part with the cam mechanism, and -force output. The thrust of the movable pulley piece (F2) of the shaft (2) is generated by the thrust by the torque transmission part and the thrust by the hydraulic cylinder part.However, in this case, the torque transmission part (24) with a cam mechanism on the input shaft (1) side works. ) The thrust generated by the centrifugal thrust acts in the completely opposite direction to the centrifugal thrust.

Therefore, when the rotation of the variable speed pulley (vl) on the input side increases, the centrifugal force generated in the centrifugal force imparting member 00) increases, and the movable pulley piece (4) receives the centrifugal thrust (Fl) and the torque transmitting part (24). ) The thrust in the opposite direction (F2) caused by
As a result, it receives the thrust of FI-F2. - On the other hand, the thrust of the movable pulley piece (F2) on the output side is the sum of the thrust (fl) by the torque transmission section (29) with a cam mechanism and the thrust (F2) by the hydraulic cylinder section (32).

This allows the movable pulley piece (
4) When the thrust generated at
) side becomes larger, and conversely, the belt winding pitch diameter on the output side speed change pulley (F2) side becomes smaller, shifting to the speed increasing side.

In this case, when the vehicle body is suddenly accelerated, the thrust by the cam of the input shaft's torque transmission part becomes larger than the cam thrust of the output shaft, and the pitch diameter of the belt winding on the input side is reduced, which is necessary for rapid acceleration. This makes it possible to automatically adjust the gear ratio.

Next, in the other embodiment shown in FIG. 4, the speed change pulley (V,) on the input shaft side is the same as in the embodiment shown in FIG. 2, but the speed change pulley (F2) on the output shaft is movable. The thrust force generated by the pulley piece α1 is generated by adding the thrust force generated by the cam, the thrust force generated by the spring, and the thrust force generated by the hydraulic cylinder section.

In other words, in the variable speed pulley (F2) attached to the output shaft, the cylindrical cam piece Q6 is provided at the boss part of the movable pulley piece.
The cylindrical cam piece (28) fixed to the shaft meshes with the cylindrical cam piece (28) to form a torque transmitting part (29) with a cam mechanism.

As a means for assisting the thrust by the cam generated by the torque transmitting part (29), a cylindrical body (31) fixed to the outer extension part (30) of the movable pulley piece and the rear shaft of the pulley piece is used. A hydraulic cylinder part (32) is provided, and the back part of the movable pulley piece 0 and the cylindrical body (31) are provided.
In between are two pulley pieces 02) and (1).
A coil spring Q) is provided which acts in the direction that the groove is compressed.

In the transmission shown in Fig. 4, the thrust generated by the movable pulley piece (4) of the input shaft (1) is generated by the centrifugal thrust by the centrifugal force imparting material and the torque transmission part (24), as in the case of Fig. 2. A thrust in the opposite direction operates, but on the other hand, the thrust generated by the movable pulley piece Q3) of the output shaft (2) is generated by the torque transmission part (29).
thrust (fυ), thrust (F2) by the hydraulic cylinder part (32), and thrust (F2) by the coil spring (2Φ).
F3) is added.

5 to 9 further show various modifications of the transmission according to the present invention, of which FIG. 5 shows the input input to the transmission shown in FIGS. 1, 2, and 4. These are modifications of the side speed change pulley, and since the output side speed change pulley in FIG. 1 is the same as in FIGS. 2 and 4, they are omitted.

In other words, Fig. 5 is a modification of the input end speed change pulley (V+) in Fig. 1, Fig. 2, and Fig. 4.
With the bottom of the bell) (B) in contact with the surface, the rotational force from the input speed change pulley (vl) is blocked by the bearing (35), and the bell) (B) and the output speed change pulley (vl) are This is the case in which the transmission is cut off in F2), which allows it to function as a belt clutch.

Of course, other effects are the same as those described above.

Furthermore, FIG. 6 shows a second modification of the input side speed change pulley (vI) in FIG. (36), and between it and the side of the cylindrical fixing piece (8) facing
, ) is interposed, and the thrust force (p+-pz) generated on the movable pulley piece (4) of the input side speed change pulley (vl) and the output side speed change pulley (F2) (not shown) are interposed. ) is generated on the movable pulley piece (fr +
b) Both speed change pulleys (V+) depending on the balance.

This method controls the gear ratio between (F2) and (F2).

Note that the other configurations are the same as those described in FIG. 1, so details will be omitted.

Next, in Figure 7, only the input side speed change pulley (V+) is in the 6th position.
In the modified example shown in the figure, the outer extension portion (7) of the movable pulley piece (4)
b) Integrated spring retainer (36) in the thrust direction
A coil spring (37) is interposed between this and the side spring retainer of the cylindrical fixing piece (8), and both ends of the coil spring (37) are connected to the back of the spring retainer (36) and the fixing piece (8), for example. Protruding pins (38) and (39) provided in
The movable pulley piece (4) is engaged with the drill holes provided at both ends of the spring to lock the spring in both directions of tightening and loosening. This makes it possible to move in the rotational and thrust directions.

Therefore, the splines or keys (6) shown in FIG. 6 are not provided.

Note that the other parts are substantially the same as those in FIG. 6, and a particular explanation will be omitted.

Fig. 8 shows a further modification of the input side speed change pulley (vl) in Figs. A spring presser (36) is integrally provided on the externally extending portion (7b) of (4), and a spring presser (41) is also provided on the extending portion (40) of the cylindrical fixing piece (8). 36) and (41), a coil spring (37) is provided so as to apply a spring thrust (F3) in a direction that reduces the groove width.

In this case, the thrust generated in the movable pulley piece (4) of the input speed change pulley (V, ) is (FI+F3), while the movable pulley piece θJ of the output side speed change pulley (v2) (not shown)
The thrust generated is (r+ + rz), and the rotation ratio of both the drive side and driven side speed change pulleys can be automatically controlled by the balance of the side thrusts.

Of course, other contents are the same as those explained in FIG. 1 and the like.

Finally, Fig. 9 shows a further modification of Fig. 8, including the spring retainer (36) and the fixed piece (
For example, connect both ends of the spring holder (41) and coil spring (37) provided at the spring holder (36).
), (41,) with protruding pins (38), (39)
On the other hand, a through hole is provided at both ends of the coil spring (37) to engage them, and the torsion reaction force of the spring causes the shaft (fl) to move between the movable pulley piece (4) and the shaft (1).
The rotational force is transmitted in the direction of rotation via an integral spring retainer (41).

The difference from FIG. 8 is that the movable pulley piece (4) is not locked by a spline or key, but is freely rotatable on the shaft (11). However, the cylindrical fixed piece (8)
It is integrated with the dovetail shaft (1) and a spline or key (6).

In each of these embodiments, as shown in FIG. 2, a torque transmission pulley (24) with a cam mechanism may be provided as a thrust generating means for the movable pulley piece.

In addition, on each side, the inner and outer extending portions (7a) and (7b) of the V pulley pieces of the input side speed change pulley, and the space (9) surrounded by the cylindrical fixing piece (8) (the shape of this space) varies depending on the required centrifugal force characteristics, but it is generally approximately triangular in shape).In the figure, there are multiple steel balls (both of which are adjusted depending on the required centrifugal force characteristics), assuming that the centrifugal force is 0. When the volume of the space is at its minimum, the apparent volume of the ball (small steel ball) is preferably 60 to 100%, usually about 90%. .

However, of course, this amount is determined as appropriate depending on the required centrifugal thrust.

In addition, in the above configuration, a cylindrical cam piece 06) is attached to the boss part (Is) of the movable pulley piece of the output side gearbox IJ (V2).
is provided, and cylindrical cam pieces (18) and (2B) fixed to the shaft (2) are provided opposite to this,
Torque transmission parts α9) and (29) with cam mechanisms are formed.

The action of the cam by this torque transmission part is in a mutually engaged state, and when the torque increases due to the action of the cam,
Thrust is generated by the cam in the direction in which the groove width between the movable pulley piece and the fixed pulley piece widens, and other means are also used (thrust due to cylinder pressure), (cam thrust), (centrifugal thrust)
This acts to automatically adjust the synthetic thrust according to the rotational speed and torque applied to the speed change pulley by the synthetic thrust.

Thus, when the above-mentioned transmission of the present invention is used as a continuously variable transmission system for an automobile, when the engine speed is increased from the idling speed of the engine with the clutch on, the input speed change pulley first becomes a fixed pulley piece due to the large starting torque. In the same way, when the vehicle starts and the speed increases to a certain extent, and the torque on the output side and input shaft decreases, the cam thrust of the movable pulley piece on the output shaft side decreases, and the centrifugal thrust on the input side becomes relatively It becomes larger and moves towards increasing speed.

The above is the above principle, but in practice, the space (9) of the input speed change pulley (V+) should be adjusted so as to match the output characteristics (maximum output, torque characteristics, and fuel efficiency characteristics) with respect to the engine speed. By controlling the shape, the effective area and fluid pressure of the cylinder of the output speed change pulley (V2), and the cam thrust generated by the torque generated on each shaft with an appropriate cam angle, the overall engine characteristics of the car are set to ideal conditions. It is possible to control the torque so that it can be used in a more compact manner and easily control the torque.

(Effects of the Invention) As described above, according to the transmission device of the present invention, the thrust force of the movable pulley piece of each transmission pulley attached to the input shaft and the output shaft changes depending on the rotation speed and also changes depending on the torque fluctuation. In addition, since it is further provided with a thrust force generating means using a spring and a thrust force generating means using hydraulic pressure as described in claims 2 and after as auxiliary means thereof, the thrust force of each movable pulley piece can be automatically adjusted according to the speed and load of the vehicle body. It is possible to obtain a predetermined gear ratio by changing the diameter of the belt around the pulley by adjusting it quickly and sensitively, and the device has a simple structure and is highly practical.

In particular, in the present invention, by providing a torque transmission part with a cam mechanism that applies thrust in the opposite direction to the centrifugal II force to the movable pulley piece of the input shaft, when the vehicle body is suddenly accelerated, the torque transmission part of the input shaft is Since the thrust generated by the cam is larger than the thrust generated by the output shaft cam, it has the effect of allowing the belt to timely shift to the state required to rapidly accelerate the vehicle body. Its effectiveness as a transmission is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional schematic diagram showing a basic embodiment of the transmission according to the present invention, FIG. 2 is a partial cross-sectional schematic diagram showing another embodiment of the transmission according to the present invention, and FIG. 2 is a schematic explanatory diagram of the input shaft side torque transmission section, FIG. 4 is a partial cross-sectional schematic diagram showing still another embodiment of the transmission device of the present invention, and FIGS. 5 to 9 are diagrams showing the input shaft in the transmission device of the present invention FIG. 7 is a partial cross-sectional schematic view showing each modification of the side speed change pulley. (vl)...Input side variable speed pulley, (v2)...Output side variable speed pulley, (1)...Input shaft, (2)...Output shaft, (3),
Hit... Fixed pulley piece, (4), θ■... Movable pulley piece, (51, Q41... Sheave shaft, (7a)... Inner extension part, (7b)... Outer extension part part, (8)... fixed piece, (9)... space part, QO)・
・・Centrifugal force imparting material, ・・Output shaft side movable pulley piece boss part, Oe, 0 Enoki,
(22), (23), (28)...Tubular cam piece, 0...Stopper, Q9), (24), (29)...Torque transmission part, (20), (37) ...Coil spring, (3
0)... Output shaft movable pulley piece outer extension part, (31)...
・Cylindrical body, (32)...Hydraulic cylinder part, (35)...Bearing, (36), (41)...Spring retainer, (3
8), (39)...Spring locking part (protruding pin). Patent Applicant Mitsuboshi Belting Co., Ltd., -1 Agent Patent Attorney Yasushi Miyamoto -・'Pano' Figure 1 Figure 3 Figure 7b Figure 4 Figure 6 Figure 7b 9th Proceedings Master Seizan (Voluntary) Heisei 1 June 16, 1988 Patent Application No. 88459 2 Name of the invention Belt type continuously variable transmission 3 Relationship with the case of the person making the amendment Patent applicant address 4-1-21 Hamazoe-dori, Nagata-ku, Kobe Name (6
06) Mitsuboshi Belting Co., Ltd. Representative Kinzo Oda 4, Agent 7 Contents of amendment (1) From the last line of page 4 to the first line of page 5 of the specification, “7 V-belts were hung” was changed to “V-belt "was hung," he corrected. (2) "Automobile body" on page 6, lines 8-9 of the specification cylinder is corrected to "automobile". (3) On page 9, lines 4 and 5 of the specification, ``Make sure to move.'' is amended to ``Make sure to start.'' (4) "Volume 1" on the first line of page 13 of the specification tube.
and correct it. (5) Change the "Fixing piece (8) dot" on page 4, line 7 of the specification to "
What is the fixed piece (8)?'' (6) On page 21 of the specification, line 19 (second line from the bottom), "both are added or subtracted" is corrected to "the amount is added or subtracted." (7) In the attached drawings, Figures 1, 2, and 4 will be corrected according to the attached drawings. 8. List of attached documents (1) Attached drawings (Fig. 1, Fig. 2, and Fig. 2) 1 copy/Fig. 1

Claims (1)

[Claims] 1. A fixed pulley piece is provided on the input shaft and an output shaft, and a movable pulley piece is provided opposite to the pulley piece so as to be slidable in the longitudinal direction of the shaft, and the pulley piece is formed by these pulley pieces. In a belt-type continuously variable transmission device in which a power transmission belt is hung in both V-shaped grooves, a fixed piece fixed to the shaft behind the back part and a movable pulley piece are attached to the back of the movable pulley piece disposed on the input shaft. A space is formed by the inner and outer extending portions protruding from the back surface of the container, and a freely movable centrifugal force imparting member is housed in this space.
A thrust force is applied to the movable pulley piece according to the rotational speed of the input shaft, while a cylindrical shape is applied to the boss portion of the movable pulley piece disposed on the output shaft and a stopper fixed to the rear shaft of the pulley piece. 1. A belt-type continuously variable transmission device, characterized in that a cam piece is provided, and a torque transmission section with a cam mechanism is provided on the output shaft by meshing the cam pieces. 2. In the belt type continuously variable transmission device according to claim 1, the movable pulley piece disposed on the input shaft has a fixed piece fixed to the shaft at the rear of the back part, and an inner and outer extending part protruding from the back side of the movable pulley piece. A space is formed by the part, and a freely movable centrifugal force imparting member is accommodated in this space, and a cylindrical cam piece fixed to the input shaft and a cylindrical cam piece fixed to the inner extension part are arranged in the space. A belt-type continuously variable transmission device, characterized in that a torque transmission section with a cam mechanism is provided on the input shaft by meshing with a cam piece. 3. As an auxiliary means for applying thrust to the movable pulley disposed on the output shaft, a V between the movable pulley piece and a stopper fixed to the shaft behind the pulley piece is installed between the movable pulley piece and the fixed pulley piece. 3. The belt-type continuously variable transmission device according to claim 1, further comprising a coil spring interposed in a direction in which the groove is contracted. 4. As an auxiliary means for applying thrust to the movable pulley disposed on the output shaft, there is a gap between the movable pulley piece and the cylindrical part fixed to the shaft at the rear of the pulley piece. 3. The belt-type rotor according to claim 1, further comprising a coil spring interposed in a direction in which the V-shaped groove is contracted, and further comprising a hydraulic cylinder portion formed by an externally extending portion on the back of the movable pulley piece and the cylindrical portion. gear transmission. 5. The belt type continuously variable transmission according to any one of claims 1 to 4, wherein the input shaft speed change pulley has a bearing at the bottom of the V-shaped groove. 6. As an auxiliary means for applying thrust to the movable pulley piece disposed on the input shaft, the movable pulley piece and the fixed pulley piece are connected between the fixed piece fixed to the shaft and the spring retainer fixed to the outer extension of the movable pulley piece. 5. The belt-type continuously variable transmission according to claim 1, further comprising a coil spring acting in a direction in which the V-shaped grooves between the belts widen. 7. As an auxiliary means for applying thrust to the movable pulley piece disposed on the input shaft, the movable pulley piece and the fixed pulley piece are connected between the fixed piece fixed to the shaft and the spring retainer fixed to the outer extension of the movable pulley piece. 5. The belt type continuously variable transmission device according to claim 1, further comprising a coil spring that acts in a direction in which the V-shaped groove between the belts is compressed. 8. As an auxiliary means for applying thrust to a movable pulley piece disposed on the input shaft, both ends of the coil spring are locked and fixed to locking parts provided on the fixed piece and the spring holder, respectively. 7. The belt type continuously variable transmission device according to any one of 7.