JPH0514720U - Continuously variable transmission - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the occurrence of a locked state of the slider with respect to the slider support portion, and to enable fine adjustment of the slider position when the stopper is activated. [Structure] When the slider 13 rotates on the slider support portion 14 and moves the movable sheave in the direction away from the fixed sheave, the protrusion 33 provided on the slider 13 is brought into contact with the rod-shaped member 34 to move the slider 13. The gear portion 14c formed on the slider support portion 14 while stopping
The position of the slider gear 13 can be finely adjusted by rotating the slider support portion 14 by rotating the worm gear 35 that meshes with the externally.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a continuously variable transmission, and more particularly to improvement of a transmission unit.

[0002]

[Prior art and its problems]

 2. Description of the Related Art Conventionally, a continuously variable transmission is constructed, for example, as shown in a schematic view of FIG. 2, and in FIG. 2, reference numeral 1 denotes an input fixed sheave formed in a substantially truncated cone shape, which is an input shaft 1a and It is integrally formed. Reference numeral 2 denotes an input movable sheave provided opposite to the input fixed sheave 1, which is externally fitted to the outer periphery of the input shaft 1a and is movable in the axial direction. The input fixed sheave 1 and the input movable sheave 2 form an input sheave 24. The left end portion of the input movable sheave 2 is fitted with the outer ring of the bearing 15 so as to rotate integrally. On the other hand, the inner ring of the bearing 15 is fitted with the slider 13 and rotates together with the slider 13.

A female screw 13a is formed on the inner peripheral surface of the slider 13, and this female screw 13a is meshed with a male screw 14a formed on the outer peripheral surface of the slider supporting portion 14 formed in a cylindrical shape. An end of the slider support portion 14 is fixed to a housing (not shown). Bearings 16 and 16 are provided inside the slider support portion 14, and the input shaft 1a is rotatably supported by the bearings 16 and 16. A gear is formed on the outer periphery of the slider 13, and this gear meshes with a small gear 12a of the power transmission gear 12 rotatably supported. On the other hand, the large gear 12b of the power transmission gear 12 is meshed with the drive gear 11 of the motor 10. The drive gear 11 is driven by the motor 10.

Reference numeral 3 denotes an output fixing sheave provided below the input pulley 24, which is formed integrally with the output shaft 3a. An output movable sheave 4 is fitted to the outer periphery of the output shaft 3a and is movable in the axial direction.

On the other hand, a collar-shaped spring receiver 3b is integrally formed at a predetermined position of the output shaft 3a, and a return spring 17 is interposed between the spring receiver 3b and the left end surface of the movable sheave 4. Has been done. Therefore, a force in the direction of reducing the inter-sheave distance is constantly applied to the output movable sheave 4 by the return spring 17. The output fixed sheave 3 and the output movable sheave 4 form an output sheave 25. A V-belt 5 is wound between the output sheave 25 and the input sheave 24.

In the figure, 18 and 19 are sensors for detecting the number of rotations. In the figure, 20 is an accelerator opening sensor for detecting the accelerator opening. Reference numeral 21 in the figure is a control device, to which signals from the sensors 18, 19 and 20 are input, and a motor driver 22 is connected to the output side. In the figure, 23 is a battery.

In such a continuously variable transmission, when the motor 10 is rotated, the slider 13 moves on the slider support portion 14, and as the slider 13 moves, the input movable sheave 2 moves to the input fixed sheave 1 On the other hand, the gear shifts by moving in the direction of contact and separation.

In such a conventional structure, when an abnormality occurs in the electric system such as the motor 10, if the input movable sheave 2 shifts further than the maximum gear ratio and continues to move to the left side in the figure, the female slider 13 moves. The screw firmly meshes with the male screw end portion of the slider support portion 14, and the slider 13 locks on the slider support portion 14, which makes it impossible to control the shift thereafter.

In order to solve such a problem, the inventors of the present application have previously proposed stopper means having a structure as shown in FIG. 3. In FIG. 3, the slider 13 is provided with a gear portion 13c. And a female screw cylindrical portion 13b having an internal thread formed on the inner periphery thereof, and a stopper member 30 is fixedly attached to the tip of the female screw cylindrical portion 13b via a bolt or the like, and the stopper member 30 is brought into contact with the stopper member 30. On the other hand, the slider support portion 14 is composed of a male screw shaft portion 14a having a male screw on the outer periphery and a flange portion 14b at the tip, and a stopper pin is provided from the flange portion 14b to the slider 13 side. 31 is driven, and the stopper pin 31 is brought into contact with the contact projection 30a to stop the movement of the slider 13 at a predetermined position to prevent the slider 13 from locking. I was there.

However, in such a structure, in order to adjust the position of the slider 13 in the state where the stopper pin 31 and the contact protrusion 30a are in contact with each other, the position of attachment of the stopper member 30 to the female screw cylinder 13b is adjusted. Since it is necessary to move the slider, it is extremely difficult to adjust the position of the slider 13, and there is a new problem that fine adjustment is impossible.

[0011]

[Means for Solving the Problems]

 The present invention has been devised in view of the above conventional problems, and does not provide a continuously variable transmission that can prevent the locked state of the slider and easily adjust the position of the slider. The purpose is to provide a fixed sheave fixed to the input shaft with a conical surface, and a V groove formed between the fixed sheave and a fixed sheave having a conical surface similar to this fixed sheave. An input sheave composed of a movable sheave mounted so as to be movable in the axial direction of the input shaft and moved by a moving means in a direction away from and in contact with the fixed sheave; a fixed sheave having a conical surface and fixed to the output shaft; and It has a conical surface similar to that of the fixed sheave and has a V groove formed between it and the fixed sheave so that it can be moved in the axial direction of the output shaft. Movable system And a V-belt wound around the V-grooves of the output sheave and the input sheave, for transmitting the rotation of the input shaft to the output shaft in a continuously variable manner. A slider having a moving means for moving the movable sheave on the input sheave side or the output sheave side in the gear transmission is provided along the outer circumference of the shaft on the opposite side of the conical surface of the movable sheave, and has an external thread on its outer peripheral surface. The inner peripheral surface of the support portion has a female screw thread that engages with the male thread of the slider support portion so that it can be threaded on the slider support portion, through a bearing and a surface opposite to the conical surface of the movable sheave. In a continuously variable transmission composed of a slider arranged in contact with the slider and a slider driving means meshed with a gear portion of the slider, the slider is driven by driving the slider. When the slider is rotated and the slider is moved on the slider supporting portion in the direction of separating the movable sheave from the fixed sheave, stopper means for stopping the movement of the slider at a predetermined position is provided. The slider is composed of a protrusion protruding from the surface opposite to the movable sheave, and a rod-shaped member whose front end contacts the protrusion, and a gear is formed on the outer periphery of the slider support. A worm gear that meshes with the gear portion and can be rotated from the outside is provided, and the slider support portion is rotated through the worm gear to adjust the position of the slider.

[0012]

[Action]

 Even if an abnormality occurs in the electronic circuit, motor, etc., when the movable sheave is moved in the direction away from the fixed sheave, the protrusion contacts the rod-shaped member to prevent the slider from rotating and the slider to move to the slider support section. It is well prevented to lock in. Moreover, by rotating the worm gear from the outside to rotate the slider support, the slider position can be finely adjusted when the protrusion and the rod-shaped member are in contact with each other, and the position where the slider is stopped is set to the optimum position. be able to.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a partially cross-sectional view of the slider and the slider support portion assembled together. A gear portion 13c is formed at the left end of the slider 13, and a female portion is formed inward from the gear portion 13c toward the right side in the drawing. A female screw cylinder portion 13b formed with a screw is projected, and a projection 33 is integrally formed on the peripheral side surface of the female screw cylinder portion 13b so as to project rightward in the drawing.

Further, the male screw shaft portion 14a of the slider support portion 14, which has an external thread formed on the outer periphery to be screwed into the female screw of the slider 13, is screwed into the screw cylinder portion 13b. A gear portion 14c is integrally formed on the outer periphery of the right end portion of the portion 14a. A worm gear 35 is meshed with the gear portion 14c, and the worm gear 35 is rotatably supported by a pair of bearings 36, 36. A gear shaft 35a of the worm gear 35 projects laterally to form a continuously variable transmission. The worm gear 36 is extended to the outside of the constituent case and the like, and the worm gear 36 can be rotated by rotating the gear shaft 35a from the outside. The bearings 36, 36 of the worm gear 35 are fixed to the case of the continuously variable transmission.

Further, a stopper pin 34 is projected above the gear portion 14c from a case side (not shown) toward the slider 13 side, and the stopper pin 34 abuts on the above-mentioned projection portion 33, so that the slider 13 moves. It is constructed so that it cannot be moved to the right in the figure more than necessary. The tip of the stopper pin 34 comes into contact with the protrusion 33 to stop the slider 13 from moving, and the slider 13 is prevented from being locked by the slider support portion 14. Further, in this example, the worm gear 35 supports the slider support portion 14. Since it is meshed with the gear portion 14c of the portion 14, the slider support portion 14 is rotated by rotating the worm gear 35 at the position of the slider 13 in the contact state of the stopper pin 34 and the protruding portion 33. It is possible to finely adjust from the outside, and the position of the slider 13 can be adjusted very easily when the stopper pin 34 acts.

Further, although the slider support portion 14 can be easily rotated via the worm gear 35, on the contrary, since the slider support portion 14 cannot rotate the worm gear 35, the slider support portion 14 is temporarily rotated by the worm gear 35. When the rotation is stopped, the slider support portion 14 is fixed in that state, and the slider support portion 14 can be arbitrarily fixed in the rotation direction. In this way, the worm gear 35 can be externally rotated to finely adjust the position of the slider gear 13, and the slicer gear 13 can be stopped at an appropriate position.

[0017]

[Effect of the device]

 In the continuously variable transmission according to the present invention, when the slider is driven by the slider driving means and the slider is moved on the slider supporting portion in the direction of separating the movable sheave from the fixed sheave, the slider is moved at a predetermined position. The stopper means is provided, and the stopper means is composed of a protruding portion protruding from the surface of the slider opposite to the movable sheave, and a rod-shaped member whose tip contacts the protruding portion. A gear portion is formed on the outer periphery of the slider support portion, a worm gear that meshes with the gear portion and can be operated from the outside is provided, and the slider support portion can be rotated through the worm gear to adjust the position of the slider. This prevents the slider from being locked by the slider support by bringing the protrusion into contact with a rod-shaped member such as a stopper pin. Gukoto it is, it has the effect that the stopper can be easily finely adjust the position of the slider when operated worm gear from outside and rotating operation.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing a state in which a slider and a slider support portion of the present invention are assembled.

FIG. 2 is a schematic configuration diagram of a conventional endless transmission.

FIG. 3 is a perspective configuration diagram corresponding to FIG. 1 showing a conventional stopper structure.

[Explanation of symbols]

 1 Input Fixed Sheave 1a Input Shaft 2 Input Movable Sheave 3 Output Fixed Sheave 3a Output Shaft 4 Output Movable Sheave 5 V Belt 13 Slider 13a Female Screw 13b Female Screw Cylindrical 13c Gear Part 14 Slider Support 14a Male Screw Shaft 14c Gear Part 33 Projection 34 Stopper Pin 35 Worm Gear 35a Gear Shaft 36 Bearing

Claims (1)

[Scope of utility model registration request] 1. A fixed sheave fixed to an input shaft having a conical surface, and a V groove formed between the fixed sheave and a fixed sheave having a conical surface similar to that of the fixed sheave to form an input shaft of the input shaft. An input sheave composed of a movable sheave mounted so as to be movable in the axial direction and moved by a moving means in a direction away from and in contact with the fixed sheave, a fixed sheave having a conical surface fixed to the output shaft, and the fixed sheave. Output comprising a movable sheave having a similar conical surface and forming a V groove between the fixed sheave and the movable sheave so as to be movable in the axial direction of the output shaft and moved by the moving means in a direction in which the fixed sheave moves away from and comes in contact with the fixed sheave A V-belt type continuously variable transmission that has a sheave and a V-belt wound around each V-groove of the output sheave and the input sheave, and transmits the rotation of the input shaft to the output shaft in a stepless manner. , The above Moving means forces the sheave side or output sheave side movable sheave of the slider supporting portion having a male screw on its outer circumferential surface is provided along the outer periphery of the opposite side of the axis of the conical surface of the movable sheave,
A female screw thread to be engaged with the male screw of the slider support portion is provided on the inner peripheral surface so that the slider support portion can be threaded, and is in contact with a surface opposite to the conical surface of the movable sheave via a bearing. In a continuously variable transmission including a slider disposed in the slider and a slider driving unit meshed with a gear portion of the slider, the slider driving unit drives the slider to rotate the slider. When the slider is moved on the slider support portion in a direction away from the fixed sheave, stopper means is provided for stopping the movement of the slider at a predetermined position, and the stopper means is provided on the surface of the slider opposite to the movable sheave. It is composed of a protruding portion and a rod-shaped member whose tip portion abuts on the protruding portion, and further, a gear portion is formed on the outer periphery of the slider supporting portion, Provided the rotational operable worm gear externally meshed with ya unit, continuously variable transmission, characterized in that the adjustable arrangement the position of the slider by rotating the slider supporting part via the worm gear.