JPS60196458A - Friction stepless speed change gear and method of manufacturing the same - Google Patents

Abstract

PURPOSE:To facilitate attachment and to reduce the apparatus to a compact size by arranging a stepless speed change mechanism portion coaxially on either an input shaft or an output shaft, and applying force to an input transmission plate, an output transmission plate, a rotor and a speed change ring to be united in a body. CONSTITUTION:A stepless speed change mechanism portion is coaxially arranged on an input shaft 1. In the input shaft 1, force is applied to an input transmission plate 2, an output transmission plate 4, a rotor 5 and a speed change ring 6 forming the stepless speed change mechanism to be united in a body. Thus, the input shaft 1 and the output shaft 16 of the speed change gear are led out in the same direction. Accordingly, the speed change gear can be very easily attached to various apparatus and the whole apparatus can be reduced to a compact size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a friction type continuously variable transmission, and particularly to a structure of one having a planetary rotor and a method for manufacturing the same.

[Prior art]

Some conventional devices have a structure disclosed in Japanese Patent Publication No. 13221/1983 as a friction type continuously variable transmission having a planetary rotor.

In this system, the human power shaft and the output shaft are led out in opposite directions, making it complicated to install the human power shaft and the output shaft in a device that requires the same direction. In addition, the mechanical strength of the case is required to support the reaction force against the pressurizing force in order to fully transmit power without slipping at multiple contact points of the transmission mechanism, which requires a mechanical strength of the case surrounding the transmission mechanism. It was usually a heavy device.

Furthermore, since the transmission mechanism can achieve dynamic balance only by assembling all of its multiple elements into the case, and is integrated, manufacturing
In particular, the assembly process required a total of one ship's time and was difficult to assemble.

Among the drawbacks of the above 111e, the point of completely eliminating the reaction force of the case is also present in, for example, Japanese Patent Publication No. 49-48909.

[Summary of the Invention] The present invention has been made to eliminate such drawbacks, and allows the input +IQ11 and the output shaft to be easily brought out on the same plane, and furthermore, there is no reaction force applied to the case.
In addition, the transmission mechanism is already dynamically balanced before it is assembled into the case, thereby providing a friction-type continuously variable transmission that is lightweight and easy to assemble.

[Embodiments of the invention]

FIG. 1 is a sectional view of a transmission showing an embodiment of the present invention.

In the figure, ■ is an input shaft;
is an intermediate shaft that is inserted into the human-powered shaft l and rotatably rotated by the bearing lO and the slanut bearing 26. Intermediate 11119
A gear 7 is fixed in the rotational direction with a key 19 on the outer periphery of the
A rotatable output transmission plate 4 is provided. The gear 7 and the output transmission plate 4 have slopes on their mutually opposing end surfaces, which serve as cam surfaces of the pressure regulating mechanism 8, and a plurality of balls 0.
81, they are engaged with each other in the rotational direction. Reference numeral 5 designates a plurality of conical rotors that contact the human power transmission plate 2 and the output transmission plate 4, respectively. The rotor 5 is also in contact with the inner circumference of the speed change ring 6. 11 is a spring, and a retaining washer 1
3, the spring seat 12 is engaged with the output transmission plate 4 in the axial direction.
An axial thrust is generated between the output transmission plate 4 and the intermediate shaft 9 via the intermediate shaft 9. Reference numeral 3 denotes a nut screwed onto the input shaft 1 for regulating the movement of the input transmission plate 2 in the axial direction. 14 is a retainer for disposing a plurality of rotors 5 evenly around the circumference;
Reference numeral 15 denotes a speed change shaft that moves the speed change ring 6 in the direction of the arrow in the figure.

(2) 6 is an output shaft, which has a gear 17 that meshes with the gear 7. 20 is a key that engages the entire output shaft 16 of the gear 17 in the rotational direction; 21, 22 bearings 24, 25, 27 that protect all the structural parts above id and support the human power shaft 1, the output shaft 16, and the transmission shaft 15f; This is a case that holds metals 29 and 30'' and holds oil seals at 31° and 32.33.

The case 21 and the case 22 are integrated with a screw 34 or the like. 23 is an output shaft 16 provided inside the case 21
This is a holder having a bearing 28 that fully supports one side of the holder. The rotating shaft of the reversible motor 35 is engaged with the outside of the case 722 and the lead-out portion of the speed change shaft 15, and the reversible motor 35 is connected to the case 2.
2 with screws 36.

Next, the speed change function in the above configuration will be explained.

The transmission mechanism shown in Fig. 1 is based on the above-mentioned
2], the transmission mechanism formed by the input transmission plate 2, the rotor 5, the transmission ring 6, and the combinations of the transmission ring 6, the rotor 5, and the output transmission plate 4 is as follows: It is similar to a so-called planetary gear transmission mechanism, and the gear ratio of each transmission mechanism, in the former case, the input transmission plate 2
and the rotor 5, and the respective speed ratios of the output transmission plate 4 and the rotor 5 are determined by the position of the speed change ring 6.

Therefore, ultimately, the output transmission plate 4 with respect to the input transmission plate 2
The transmission ratio is also determined by the position of the transmission ring 6. Unfortunately, the pressure contact point of the speed change ring 6 against the rotor 5 is the first one.
When moving to the L side shown in the figure, the gear ratio increases, and the maximum gear ratio is infinite, that is, the value at which the output transmission plate 40 rotation speed becomes zero, and when moving to the H side, the ratio becomes smaller.
The minimum value is a predetermined value determined by the husband's dimensions (generally about 1.5 to 2 inches). That is, the speed change ring 6
By selecting all positions, the speed ratio (reduction ratio) can be obtained steplessly from infinity to a predetermined value.

Now, at the contact points where the human power transmission plate 2, the output transmission plate 4, the rotor 5 and the f-ring 6 come into contact with each other, there is a pressure contact force.
The reason why slippage does not occur during N force transmission is based on the generation of pressure contact force by the thrust of the spring 11 and the pressure regulating mechanism. That is, spring 1
1 uses the intermediate shaft 9 as a fulcrum and applies a thrust to the spring seat 12. This pressure is applied to the output transmission plate 4 via the preset washer 13.
is applied to the input transmission plate 2 and the speed change ring 6 via the rotor 5.

One force, pressure regulation 4fA structure is a well-known pressurizing mechanism, and gear 7
The slope provided on the output transmission plate 4 and the pole 081 generate a thrust corresponding to the required amount of rotational torque of the gear 7,
Like the spring 11, it is applied to the output transmission plate 4. Here, the spring 11 applies an initial pressure to the output transmission plate 4, and most of the pressing force required to transmit the torque of the human power shaft 1 is provided by the pressure regulating mechanism 8.

Here, as is clear from FIG. 1, the axial component of the thrust generated by the spring 11 and the pressure regulating mechanism 8 is generated and absorbed by the human-powered shaft. In other words, the pressure acting on the gear 7 and the intermediate shaft 9 is
The pressure acting on the suction IF I, input transmission plate 2 VC at the collar 0.11 of the shaft 1111 is absorbed at the threaded portion 012 of the human power shaft 1 via the seat nut 3. In this way, the pressure generated by the spring 11 and the pressure regulating mechanism is
Since the reaction force is absorbed by the case 21 and the case 22, no reaction force is generated at all.

Now, (1) when the speed change ring 6 is at the maximum position in the L side direction shown in FIG. Naturally, the input transmission plate 2 also rotates at the same rotation speed. As a result, the rotor 5 also revolves along the speed change ring 6 while rotating on its own axis. However, since the output transmission plate 4 does not rotate, the output shaft 16 coupled to the gear 7 through the gear 17' does not rotate. When the reversible motor 35 is fully rotated and the speed change shaft 15 is rotated, the speed change ring 6 starts to fully move toward the H side shown in FIG. It rotates at a speed ratio determined by the position of 6 and a rotation speed determined by the rotation speed of the input shaft 1. The above is an explanation of the speed change function.

Next, the manufacturing method, particularly the assembly method, of this transmission will be explained.

As mentioned above, this transmission includes a human power transmission plate 2, an output transmission plate 4,
The rotor 5 and the speed change ring 6 are integrated by balancing the forces shown in FIG. 2.

In FIG. 2, the load Q is the combined force of the spring 1 and the pressure regulating mechanism 8. The load -Q is a force applied to the birth nut 3 as a reaction force of the load Q.

Here, the load Qr and the load Qo are expressed by the following equations.

Further, the load QN is a vector sum of the load Qr and the load Qo. In other words, for the forces to be balanced and integrated as described above, force must be added! First, it cannot be integrated, and for this reason, it is extremely difficult to assemble the conventional bending device described above.

However, in the structure shown in FIG. 1, this force can be applied to the input shaft 1-, that is, by tightening the seat nut 3, the full pressure of the spring 11 can be set, and the force shown in FIG. Since the balance can be easily obtained, the integration is completed before the cases 22 and 23 are separated. It is also clear that the fact that integration is possible without the cases 22 and 23 has the advantage of extremely easy work when assembling the Vt.

Figure 1 shows a configuration that is integrated on the input shaft 1, but as shown in Figure 3, the same effect can be achieved even if the entire configuration is implemented on the output shaft 1G. .

That is, in FIG. 3, 2' is an input transmission plate having a gear 021, and the output shaft 16K 71 is rotatable around the bearing 0 and the thrust bear link 26. Reference numeral 36 denotes a transmission body having an inclined surface, which is a part of the pressure regulating mechanism, and is engaged with the output shaft 16 in the rotation direction by a key 20.

161 is the thrust bear link 2 provided on the output shaft 16
6, and 162 is a threaded portion provided on the output shaft 16 for the NAND 3 with a seat.

As is clear from FIG. 3, the force of the spring 11 is applied to the collar 1.
It is received between 61 and Ungetsu Nando 3, and is integrated into each part. In this case, the input shaft single gear 021
It is not a moat that is set up as a separate axis through the.

〔Effect of the invention〕

As explained and explained above, in order to make the input shaft and the output shaft of the transmission to be derived from the same direction, the continuously variable transmission mechanism section is coaxially located above either the input iM or the output shaft. The input transmission plate, the output transmission plate, the rotor, and the transmission ring, which are continuously variable transmission mechanism parts, are integrated by applying force to the input transmission plate, output transmission plate, rotor, and transmission ring on the human power shaft or output shaft, which is the central axis of the transmission system.
It is extremely easy and compact to install in various devices that require the manual shaft or output shaft of the transmission to be in the same direction, and the mechanical strength of the transmission can also be increased. Alternatively, since the large force required for shifting at the output 1q11 is absorbed, the strength of the cake that supports and protects the shifting mechanism can be reduced, making it extremely lightweight and inexpensive.

Furthermore, since the continuously variable transmission mechanism part can be integrated on the human power shaft or output shaft without holding the cake, it is extremely advantageous for the assembly process.It is small, lightweight, and economical. This provides an excellent effect of being able to provide a frictionless continuously variable transmission with superior performance.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a continuously variable friction transmission according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the effect of force k Fit? FIG. 3 is a partial view showing another embodiment of the present invention. ■...Human power shaft, 2, 2'...Input transmission plate, 3...Nut with seat, 4...Output transmission plate, 5...Rotor, 6...
・Speed ring% 7... Gear, 8... Pressure regulating mechanism, 1
o...Bearing, 11...Spring, 1G...Output full+, 26...Bearing. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 4

Claims (1)

[Claims] (4) It has an input shaft and an output shaft, and the input 1f (1+
In the transmission system leading to the output shaft, an input transmission plate, an output transmission plate, and a plurality of conical rotors are provided in a coaxial relationship, and the rotor contacts the conical surface of the rotor. The speed change ring surrounding the input transmission plate, the rotor, and the speed change ring have a corresponding relation to a planetary gear transmission mechanism, respectively, and have a coaxial relationship with the input shaft or the output shaft. The above input transmission plate, output transmission plate,
The pressure contact point where the rotor and the speed change ring are in contact with each other receives the pressure contact force from the pressure contact force generating means, which applies a thrust force to the pressure contact point, and maintains the balance of the force, and - The reaction force of the above thrust force is supported by the above input shaft or output shaft. A continuously variable friction transmission that is characterized by: (2) An input transmission plate, an output transmission plate, and a plurality of conical rotors having a coaxial relationship provided on a transmission system extending from the input shaft to the output shaft on the input shaft or the output shaft; a transmission ring that abuts the conical surface of the rotor and surrounds the rotor; the input transmission plate and the rotor;
In the combination of the iron speed change ring, the output transmission plate, the rotor, and the 112 speed change ring, each having a considerable relationship with the planetary gear transmission mechanism, -1- input input transmission plate, "= arrangement The output transmission plate, the pressure contact point where the above first trochanter and manual speed change ring are in contact with each other, are given a pressure contact force from the pressure contact force generation means that applies the entire thrust, and after maintaining the force balance and integrating the above-mentioned A method for manufacturing a continuously variable friction transmission, which comprises incorporating the transmission into a case that supports an input shaft or the output shaft.