JPH0527772B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a taper cone that automatically rotates in conjunction with the drive rotor around the axis of the drive rotor connected to the input shaft, The present invention relates to a friction type continuously variable transmission in which an output rotating body that contacts the tapered surface of the taper cone is shiftable in the axial direction.

[Conventional technology]

Generally, this type of friction type continuously variable transmission does not have the function of a clutch, so it is possible to connect a clutch separately on the output side to connect and disconnect the power from the friction type continuously variable transmission. It's getting old.

[Problem that the invention seeks to solve]

However, with such a structure in which the clutches are connected separately, the overall size of the device tends to increase because a separate space must be secured for the connection point.

For example, if the clutch is directly connected to the extension of the output shaft of the device, it will be bulky in the axial direction, and if it is installed parallel to the output shaft, it will not only be bulky in the radial direction but also require a new transmission shaft. The disadvantage is that the structure becomes complicated because of the need for this.

The present invention has focused on such a situation and aims to reduce the size of the entire friction type continuously variable transmission by rationally incorporating a clutch into the device.

[Means for solving problems]

The characteristic configuration of the present invention for achieving the above object is that an output shaft is arranged concentrically with the output rotating body, a transmission member integrated with the output shaft, and a cylindrical clutch loosely fitted to the output shaft. A multi-plate clutch is provided between the clutch body and the clutch body, and an output rotating body is fitted around the outer periphery of the clutch body to enable torque transmission and shifting.The functions and effects thereof are as follows.

[Effect]

According to the above configuration, the tapered surface of the taper cone presses against the output rotary body, so that the rotational force of the taper cone is transmitted to the output rotary body, and the clutch body loosely fitted to the output rotary body and the output shaft is transmitted to the output rotary body. and rotate in unison. When the multi-plate clutch is operated in this state, the transmission member integrated with the output shaft and the clutch body are connected, and the rotational force of the clutch body is transmitted to the output shaft via the transmission member. Furthermore, by operating the multi-disc clutch to disengage, the transmission member and the clutch body are disengaged, and the clutch body returns to an idle state, so that the transmission of power to the output shaft via the transmission member is cut off. Become.

〔Effect of the invention〕

As explained above, by incorporating a multi-plate clutch using the narrow space located inside the output rotating body, it has become possible to make the overall size smaller compared to the conventional method in which the clutch is provided separately. . Moreover, in this type of friction-type continuously variable transmission, the diameter of the output rotating body corresponding to the driven side is generally increased in order to smoothly perform friction transmission, but in the present invention, the diameter of the output rotating body is increased. Because it is externally fitted onto a clutch body that has a larger diameter than the output shaft, it exhibits greater strength than conventional products against axial forces applied when shifting the output rotating body and pressure from the taper cone. That's what I do.

〔Example〕

Hereinafter, a friction type continuously variable transmission to which the present invention is applied will be explained based on the drawings.

As shown in FIG. 1, a carrier 2 is externally fitted via a bearing onto an input shaft 1 which is supported through a transmission case M, and a plurality of taper cones 3 are arranged around the carrier 2. A driving gear 4 as a driving rotary body is fixedly disposed on the transmission upper side of the shaft 1, and is engaged with a driven gear 5 provided on the small diameter side of the taper cone 3.

Further, a first transmission member 7 is spline-fitted to the upper transmission end of the cylindrical output shaft 6 which is loosely fitted to the input shaft 1, and a double cylindrical clutch body 8 and a second transmission member are fitted on the lower side thereof. A transmission member 9 is loosely fitted into each member. A hydraulic first multi-plate clutch A is installed on the upper side of the clutch body 8, and a second multi-plate clutch B is installed on the lower side of the clutch body 8, and a driven disk as an output rotating body is installed outside the clutch body 8. 11 is fitted onto the outside so as to be able to shift and transmit torque, and its outer peripheral portion is in contact with the tapered surface 3a of the taper cone 3.

Therefore, the rotational power of the input shaft 1 is transmitted to the taper cone 3 as rotational force via the driving gear 4 and the driven gear 5, and then is transmitted as the rotational force of the driven disk 11 due to frictional rotational resistance.
In this case, when the driven disk 11 is shifted along its axial direction, the contact position between the tapered surface 3a and the outer peripheral portion of the driven disk 11 shifts, and the rotation ratio between the taper cone 3 and the driven disk 11 changes. In other words, the rotational power of the input shaft 1 is transmitted to the driven disk 11 after being changed in speed. A pressure regulating device 12 is provided on the large diameter side of the taper cone 3 to move the taper cone 3 toward the small diameter side along the axis of rotation, and presses the tapered surface 3a against the outer peripheral surface of the driven disk to generate a strong force. generates a strong frictional force.

The first multi-disc clutch A will be explained.

A large number of transmission fitting grooves 13 are formed on the transmission upper side of the outer cylinder 8a of the clutch body 8 along the axis P direction so as to penetrate inside and outside, and are provided on the inner circumferential surface for guiding the driven disk 11. The engaging portion 11a is engaged by an external force to about half the depth, while a plurality of drive plates 14 are fitted from the inside to about half the depth. Further, a plurality of driven plates 15 are fitted to the first transmission member 7 in a state where they alternate with the drive plates 14.

Further, a first hydraulic piston 16 is provided adjacent to the partition wall 8b of the clutch body 8, and an oil passage 17 communicating with the hydraulic chamber _S1 formed between the partition wall 8b and the first hydraulic piston 16 is connected to the clutch body 8, output shaft 6,
The first hydraulic piston 16 is moved to the upper side of the transmission by being bored across the input shaft 1 and supplying pressure oil from the outside to the hydraulic chamber _S1 . When the first hydraulic piston 16 moves, the drive plate 14
Then, the driven plate 15 is brought into pressure contact, the clutch body 8 and the first transmission member 7 are integrally connected, and the state is such that power can be transmitted from the clutch body 8 to the first transmission member 7, that is, the clutch is engaged. In addition, 18 in FIG. 1 is a seal that prevents oil leakage, and 19 is a spring that pushes back the first hydraulic piston 16 in a state where the pressure is reduced. A bearing 20 is interposed between the free end of the clutch body 8 located on the transmission upper side and the first transmission member 7, and is sufficiently reinforced to resist the pressure applied from the tapered surface 3a. is being done.

Next, the second multi-plate clutch B will be explained.

As shown in FIG. 2, a large number of transmission fitting grooves 21 are formed on the lower transmission side of the outer cylinder 8a of the clutch body 8 along the axis P direction, and a drive plate 22 is fitted inside the grooves 21. At the same time, driven plates 23 are fitted onto the second transmission member 9 so as to alternate with the drive plates 22. Further, a second hydraulic piston 24 is provided adjacent to the partition wall 8b of the clutch body 8, and the partition wall 8b and the second hydraulic piston 2
Oil passage 2 that communicates with the hydraulic chamber S _Z formed between
5 is bored across the clutch body 8, the output shaft 6, and the input shaft 1, and by supplying pressure oil from the outside to the hydraulic chamber _SZ , the second hydraulic piston 24 is moved to the downstream side of the transmission. be. Second hydraulic piston 24
When the clutch body 8 moves, the drive plate 22 and the driven plate 23 come into pressure contact, and the clutch body 8
The clutch body 8 and the second transmission member 9 are integrally connected, and the clutch is in a state where power can be transmitted from the clutch body 8 to the second transmission member 9, that is, the clutch is engaged.

Note that 26 in FIG. 1 is a spring for pushing back the second hydraulic piston 24 in a state where the pressure is reduced.

A transmission output shaft 27 is arranged parallel to the output shaft 6, and a small diameter transmission gear 28 and a large diameter transmission gear 29 are provided on the shaft 27, and the small diameter transmission gear 28 and the second transmission member 9 are set to idle. Gears are interlocked via a gear 30, and a large diameter transmission gear 29
and an output gear 31 provided on the output shaft 6 are engaged with each other. Therefore, when the first multi-disc clutch A is engaged, the rotational power of the output shaft 6 is reversed and significantly decelerated to the transmission output shaft 27, and when the second multi-disc clutch B is engaged, the rotational power of the output shaft 6 is transferred to the transmission output shaft 27. The rotational power of the transmission member 9 is transmitted to the transmission output shaft 27 in a normal rotation state.

That is, when the first multi-plate clutch A is engaged, reverse power is obtained, and when the second multi-disc clutch B is engaged, forward power is obtained.

In this way, the friction type continuously variable transmission to which the present invention is applied is small despite having two multi-plate clutches A and B internally, and can hold the driven disk 11 accurately and reliably. It has become a structure.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the friction type continuously variable transmission according to the present invention, with FIG. 1 being a longitudinal sectional side view and FIG. 2 being an exploded perspective view of a multi-plate clutch. 1...Input shaft, 3...Taper cone, 3a...
Tapered surface, 4... Drive rotating body, 6... Output shaft, 7
...Transmission member, 8...Clutch body, 11...
Output rotating body, P... shaft core, A... multi-plate clutch.

Claims (1)

[Claims] 1 Axial center P of the drive rotor 4 connected to the input shaft 1
A taper cone 3 that rotates on its own axis in conjunction with the drive rotor 4 is arranged around the rotor, and an output rotor 11 that comes into contact with the tapered surface 3a of the taper cone 3 is provided so as to be shiftable in the axial direction. The friction-type continuously variable transmission has an output shaft 6 arranged concentrically with the output rotating body 11, a transmission member 7 integrated with the output shaft 6, and a cylindrical shape loosely fitted to the output shaft 6. A multi-disc clutch A is provided between the clutch body 8 and the output rotating body 11 on the outer periphery of the clutch body 8.
Friction type continuously variable transmission fitted externally to enable torque transmission and shifting.