JPS622353Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt-type torque control device for a power transmission belt.

Various types of conventional torque control devices are known, such as mechanical, hydraulic, and disk types, all of which have advantages and disadvantages, and are used depending on their uses and purposes. Among them,
Recently, mechanical and oil-type control devices are the most common and widely used for automobiles, which are in high demand, but the former has problems in operability such as energy loss due to poor gear shift timing and driving stability. On the other hand, the latter has problems in terms of transmission efficiency, and there is a strong need for improvement.

The present invention was developed in response to the above-mentioned actual situation, and was developed as a result of intensive studies aimed at overcoming and improving the above-mentioned difficulties especially for automobiles, and is an inexpensive and highly efficient belt. The object of the present invention is to provide a type torque control device.

That is, the feature of the present invention is that in a known belt transmission device in which a belt is suspended between a driving side variable speed pulley and a driven side variable speed pulley, a portion of one side of the fixed pulley of one of the variable speed pulleys is A contact piece is provided on one side of the movable pulley in an electrically insulated state, and one or two contacts are provided from the outside of the pulley opposite to each of the contact pieces, each in an electrically insulated state. , the respective contact pieces on one side of the fixed and movable pulleys are electrically coupled, and when the belt is suspended from each pulley and the belt is traveling, the belt is provided on either the driven side or the driving side speed change pulley under no load conditions. Each contact piece and contactor are arranged so that they are always energized and de-energized alternately between the maximum and minimum load running conditions, and when a load is applied to the moving speed change pulley and belt, the power is applied to the driven side or the driving side. A relative torsion occurs between the fixed pulley piece and the movable pulley piece of either one of the variable speed pulleys, and based on the relative positional deviation between the respective contact pieces caused by this, the The relative time ratio of electrical energization and interruption between each contact piece and contactor is taken out as an electrical signal, the signal is electrically processed, and based on that, the ratio between the fixed pulley piece and the movable pulley piece is An external actuating power is activated via an amplifier with a control function so that the relative torsion angle of Adjust and change the effective diameter of the V belt in the speed change pulley,
The present invention is further equipped with an electric control means that follows this and changes the effective diameter of the V-belt of the opposing speed change pulley and automatically adjusts the rotation ratio between the driving and driven speed change pulleys.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows an example of the belt-type torque control mechanism of the present invention. In the figure, P ₁ and P ₂ are V-speed variable pulleys on the driving side and driven side, and the V-belt 1 is connected between these pulleys. suspended.
Of these, the drive side variable speed pulley P ₁ is the fixed pulley piece 2'
and a movable pulley piece 2, and in order to move the movable pulley piece 2 by an external force, the inner ring of the bearing is integrally latched to a part of the fixed pulley piece 2 in the axial direction. However, a grooved ring 3 is provided on the outer ring of the bearing.
A shifter 4 that can be moved around a support shaft 5 is installed on the outside thereof, and an external force is applied to the tip 6' of an external force carrying arm 6 around the support shaft 5 of the shifter 4, causing the shifter 4 to work in the direction of the arrow. , move the movable pulley piece 2 left and right in the axial direction, and shift the speed change pulley P ₁
The rotation ratio between the speed change pulleys P 2 and P 2 is automatically changed by changing the V groove width of the speed change pulley P ₂ and changing the effective diameter of the V belt ₁ in the driven side speed change pulley P ₂ to follow this change. It has a structure that allows for change.

On the other hand, the other driven speed change pulley P ₂ has a spring retainer 10 integrated with the shaft on the side of the movable pulley piece in the axial direction of the movable pulley piece 7 and the fixed pulley piece 8 in the same way as the drive side speed change pulley. A repulsive coil spring 9 is interposed between the boss portion 11 of the movable pulley piece 7 and the spring retainer 10, and a protruding pin (not shown) provided on the side surface of the boss portion 11 and the spring retainer 10. Each end of the spring 9 is respectively locked, and the spring 9 is constructed so that when the vehicle is running, a load is generated in the direction in which the spring 9 is unwinded due to the load generated on the belt suspended by the pulley.

That is, this driven side variable speed pulley P ₂ generates torsional torque in the spring 9 due to the relative positional deviation between the movable pulley piece 7 and the fixed pulley piece 8, that is, the load generated on the pulley when the belt runs, and responds accordingly. When the spring 9 is twisted, a predetermined angle deviation occurs between the fixed pulley piece 8 and the movable pulley piece 7.

Therefore, the present invention provides a mechanism for automatically and appropriately adjusting the rotation ratio between both pulleys P ₁ and P ₂ by detecting such relative deviation, with the driven pulley P ₂ as the detection side. This is an essential part of the present invention.

This configuration will be described in detail below. First, in the driven side variable speed pulley P ₂ , a part of the spring retainer 10 that is integrated with the shaft provided on the axial extension of the fixed pulley piece 8 and the movable pulley piece 7 Contact pieces 12 and 13, which are electrically insulated and made by cutting a conductive ring to a certain length in the circumferential direction, are provided independently and electrically insulated from the main pulley on a part of the boss portion 11 of the main body pulley. One contact A, B is provided in an electrically insulated state from the outside of the pulley, facing the contact pieces 12, 13, and the respective contact pieces 12, 13 are electrically connected by a wire connection 14. , contacts A and B are connected to a device (not shown) that emits an electrical signal, and are configured so that the relative time ratio of electrical conduction and interruption between the contacts and the contact piece can be extracted as an electrical signal.

In this case, the manner of the contact position between the contactor and the contact piece is set depending on the respective purpose, but when traveling, the load generated on the speed change pulley of the present invention causes it to be fixed to the movable pulley piece 7 of the driven side speed change pulley. When the pulley piece 8 undergoes relative torsion according to the load, the contact position between the respective contact pieces 12, 13 and the contacts A, B changes accordingly. If this is shown in a conceptual diagram, the third
The result will be as shown in Figure 4.

Here, Fig. 3 shows the case when there is no load, A shows the contact A and the contact B are in the connected state, B shows the disconnected state, and the modes A and B are periodically changed by the rotation of the pulley of the present invention. occurs. That is, when a current is applied from the outside between contactor A and contactor B, energization and interruption can be repeated. On the other hand, Fig. 4 shows the case where a load is applied, and as in Fig. 3, A shows the connected state and B shows the disconnected state, but compared to the no-load state, the torsion angle θ corresponds to the torsion angle θ when the load is applied. The time during which the contacts A and B are in the connected state is shortened by that amount, corresponding to the load.

Although FIGS. 3 and 4 show a case in which the contacts are lined up substantially in a straight line when no load is applied, they do not necessarily have to be lined up in a straight line.

Thus, the load generated on the speed change pulley of the present invention as described above causes relative torsion between the fixed pulley piece 8 and the movable pulley piece 7 of the driven speed change pulley _P2 in accordance with the load. Based on the relative positional deviation between the contact pieces 12 and 13, a signal for electrical energization and disconnection between the contact pieces and the contact pieces is extracted to the outside via the respective contacts A and B, and the signal is electrically By processing this, the necessary electrical control means is activated and the desired adjustment is achieved, and FIG. 2 shows one example of this.

That is, in FIGS. 3 and 4, the signal taken out to the outside via the contactor is electrically processed as a relative time ratio, and based on that, the fixed pulley piece 8
The external operating power 15 is actuated via an amplifier M having a control function so that the relative torsion angle θ of the movable pulley piece 7 is kept at the set value, and the drive side speed change pulley is
The movable pulley piece of _P1 is adjusted to move in the axial direction from the outside via a ball bearing by the operating power, and the effective diameter of the V belt in the driven side speed change pulley is varied accordingly, and the driving side and driven side The rotation ratio between the speed change pulleys is automatically adjusted to transmit power at a constant torque.

As another modified embodiment, as shown in FIGS. 5 and 6, a pair of contacts C and D are connected to the contact pieces 12 and 13 of the fixed pulley side 10 and the movable pulley side 11 from the outside of the pulley, respectively. Contacts E and F are provided, and one of the pair of contacts is connected to each other (for example, D
(E) There is also a method of outputting electrical signals to the outside from the contacts C and F, which can be adopted at any time, but can be implemented as in the previous embodiment without any changes.

The device of the present invention is composed of a series of mechanisms as described above, and as a result, due to the load generated on the speed change pulley, the gap between the fixed pulley piece 8 and the movable pulley piece 7 of the driven speed change pulley _P2 is Utilizing the relative torsion that occurs, and based on the resulting relative positional deviation between the contact pieces, it is sent to the outside as an electrical energization/cutoff signal between the contact pieces through each contact piece. The movable pulley piece of the drive-side speed change pulley is driven from the outside by the actuating power, and is electrically processed to maintain a predetermined set value. and adjust the effective diameter of the V-belt in the driven side speed change pulley accordingly.
The rotation ratio between the drive-side and driven-side speed change pulleys is always automatically adjusted to an appropriate ratio, and a constant torque of power can be transmitted.

Note that the above explanation has been about the case where the speed change pulley P ₁ is the drive side speed change pulley and the speed change pulley P ₂ is the driven side speed change pulley, and the speed change function with a torque detector is incorporated in the driven side speed change pulley. The variable speed pulley that incorporates the function is not limited to the driven side, but may also be incorporated on the driving side, and in this case, the function is basically the same as the above explanation.
And similar effects can be obtained.

As described above, the belt-type torque control device of the present invention has a torque conversion (detection based on torsion angle) function built into the speed change pulley. The device is much more compact and inexpensive than the conventional oil-type and mechanical (gear transmission) detection methods.
High transmission efficiency for torque control mechanism,
It also has a mechanism with good adjustment, making it extremely useful as a control device that can be used in a wide range of applications including automobiles, and its practical use is highly anticipated in the future.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view showing one example of the belt-type torque control device of the present invention, Figure 2 is a block wiring diagram of the electrical control system in Figure 1, Figure 3 is
B and Fig. 5 A and B are conceptual diagrams of each example showing the positional state between the contact piece and the contactor of the driven side variable speed pulley when there is no load, and Fig. 4 A and B and Fig. 6 A and B are the FIG. 5 is a conceptual diagram of each load state shown in FIG. 1... V belt, 2... Drive side movable pulley piece,
3... Grooved ring, 4... Shifter, 5... Shifter support shaft, 6... Tip of carrying arm, 7...
Driven side movable pulley piece, 8... Fixed pulley piece, 9... Coil spring, 10... Spring holder, 11... Movable pulley piece boss part, 12, 1
3...Contact piece, 14...Wire connection, 15...External operating power, _P1 , _P2 ...Speed pulley, A, B, C, D,
E, F...contact, M...amplifier.

Claims (1)

[Scope of utility model registration request] Consisting of a fixed pulley piece and a movable pulley piece, the movable pulley piece is provided on the axial extension of the fixed pulley piece so as to be movable in the axial direction and rotational direction, and the movable pulley piece is provided on one side on the axial extension of the fixed pulley piece. A repulsive elastic coil spring is interposed between the spring holder and the movable pulley, and both ends of the spring are respectively engaged with protrusions provided on the sides of the movable pulley piece and the spring holder. One of the pulleys is a variable speed pulley configured so that a load generated by a belt suspended on the spring causes a load to be applied in the direction of winding and loosening the spring. In a belt transmission device in which the other pulley is a variable speed pulley equipped with an operating body for moving the movable pulley piece, and a V-belt is suspended between the two pulleys, one side of the fixed pulley of the one variable pulley is provided. A part of the shaft and the integral member,
A contact piece is provided on a part of one side of the movable pulley in an electrically insulated state, and one or more contacts are provided on each of the contact pieces in an electrically insulated state from the outside of the pulley. Electrically connect each contact piece on one side of the pulley, and when the belt runs,
Under no-load conditions, the respective contact pieces and contacts provided on the one speed change pulley are formed so that they are always energized and de-energized alternately between maximum and minimum load running conditions, and the speed change pulley while running and when a load is applied to the belt, relative torsion occurs between the fixed pulley piece and the movable pulley piece of the one speed change pulley,
Based on the resulting relative positional deviation between the respective contact pieces, the relative time ratio of electrical conduction and interruption between the respective contact pieces and the contact pieces is extracted as an electrical signal through the respective contact pieces, This is electrically processed and based on it, an external operating power is actuated via an amplifier having a control function so that the relative torsion angle between the fixed pulley piece and the movable pulley piece is maintained at a predetermined set value. The movable pulley piece of the other or one speed change pulley is moved and adjusted in the axial direction by the external operating power, and the effective winding diameter of the V belt in the speed change pulley formed by both pulley pieces is changed; A belt-type torque control device comprising an electric control means for following and changing the effective winding diameter of the V-belt on the other speed change pulley facing the speed change pulley.