JPS6065954A - Speed change v pulley - Google Patents

Abstract

PURPOSE:To prevent slipping by urging a pair of opposed movable conical plates in such a manner as to be brought close to each other, and coupling the movable conical plates and a rotary shaft to the outer peripheral portion by a roll pin through a dry metal to uniformalize side pressure of a speed change V-belt. CONSTITUTION:A pair of movable conical plates 2, 2' are slidably loosely fitted to a rotary shaft 1 having a fitting hole 10 bored through one side axis thereof through boss portions 4, 4', and the movable conical plates 2, 2 are urged to be brought close to each other by springs 3, 3' mounted in cylinders 8, 8 covering the outer surface of the boss portions 4, 4'. A pair of roll pins 5, 5' are rotatably inserted in insertion holes 12, 12' bored through the boss portions 4, 4' through dry metals 6, 6' on the outer peripheral portion. Both end portions of the roll pins 5, 5' are turnably inserted in guide grooves 7, 7' bored through the rotary shaft 1 and guide grooves 9, 9' bored through the cylinders 8, 8' while the axial movement being regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a variable speed V pulley used in a belt-type continuously variable transmission, etc., and in particular, to a variable speed V pulley that is used in a belt type continuously variable transmission, etc. By connecting the movable conical plate and the rotating shaft with a roll pin with dry metal interposed on the outer periphery, the lateral pressure of the variable speed V-belt is equalized, thereby eliminating slippage and eliminating mechanical friction and fine movement at the joint. This is intended to prevent wear as much as possible.

Conventional speed change V-boots of this type have a movable conical plate attached to a fixed conical plate so that they can move toward and away from each other, and ball bearings are used as rolling keys, so there is no uniformity in the lateral pressure on the left and right side of the speed change belt. The mechanical play in the axial direction due to impact, vibration, wear, etc. of the rolling key was significant, and therefore, reliable torque transmission could not be expected, and durability was also lacking.

This invention has been made with the aim of eliminating such drawbacks, and includes a pair of movable conical plates that are fitted onto a rotating shaft in a sliding manner and are constantly pressed and biased toward each other by means of a spring or the like. A roll pin is inserted into the boss portion of the movable conical plate so that it can rotate freely with a dry metal interposed on its outer periphery, and a guide groove and a rotation shaft are provided at both ends of the roll pin. A pair of movable conical plates facing each other with respect to the rotating shaft are loosely fitted into guide grooves formed in a cylindrical body that also serves as spring receivers to restrict axial movement and allow transfer. By connecting them in a fixed manner so that they can freely slide within a certain range in the axial direction, the speed can be changed; smoothing of the side pressure of the belt eliminates slipping; and the dry metal is not subject to axial impact, vibration, etc. against the roll pin. This prevents as much as possible the occurrence of mechanical friction and micro-movement wear that are characteristic of rolling motion, thereby increasing the reliability and durability of torque transmission.At the same time, the structure is simplified to reduce manufacturing costs and wear. The gearbox is designed to provide smooth shifting.

Hereinafter, one embodiment of the speed change boo according to the present invention will be explained in detail based on the drawings. Rotating shaft drilled in the side axis, (2), (
2)' is a pair of movable conical plates, the boss part (4),
<4Y is loosely fitted to the rotating shaft (1) so that it can slide freely, and is fixed to both ends of the rotating shaft (1) to form the boss part (4).<4
A cylindrical body (8) that also serves as a spring receiver placed over the outer surface of the Y.
(8)' A tendril spring interposed between (3) and (3
)' by the movable conical plate (2).

(2Y is always pressed in the approaching direction and arranged oppositely to form a gearshift ■boot.The boss part (4)
Dry metals συ and α1 are interposed on the sliding surface of -1(4)' with the rotating shaft (1). (5) l (5γ is a movable conical plate (2).

(Insertion hole drilled in boss part (') + (4)' of 2Y (
6), a roll pin with a dry metal (6) l (6)' interposed on the outer periphery and inserted through it so that it can rotate freely, and a guide groove (7 ), (rf and cylinder (8).

The rotating shaft (1) is loosely fitted into the guide grooves (9) and (9)' drilled in the CRT to restrict its axial movement and allow transfer.
A pair of movable conical plates (2) facing each other, <2Y
is p-lupine (5).

The guide grooves (7), (7Y, (9), (9)') are fitted in such a way that they are fixed in the rotational direction via <5Y and can freely slide in the axial direction within the ranges of the guide grooves (7), (7Y, (9), and (9)'). Movement of the roll pins (5) and (5)' in the axial direction is restricted by the guide groove (7) of the rotating shaft (1).

(Bottom surface of 7γ and cylindrical body (S), (Guide groove of Sγ (9
), (9)' on the bottom of the roll pin (5), (5
)' is regulated by abutting against the end face of the shaft so that its rotation is not inhibited. α4 is a pair of movable conical plates (2),
(With the speed change belt hooked between 2Y, both movable conical plates (
2), (27') are constantly held under pressure by the pressing force in the approach direction by the springs (3) and (3)'.

In the above configuration, a pair of movable conical plates (2), (2Y
When moving toward and away from each other, the movable conical plate (2), (boss part (4) of 2Y).

(4) Due to the dry lubrication effect of the dry metal αη, which is interposed on the sliding surface between the rotary shaft (1) and the rotating shaft (1), the sliding movement of the movable conical plate (2), (2Y) against the rotating shaft (1) is easy. The guide grooves (7), (7Y and (Q) l (
Because it rolls smoothly and lightly along Q)', the shock, vibration, friction, etc. that the P-ru pin (5) and C5Y receive during gear shifting are all received and absorbed by the dry metal (6) I (6)'. Therefore, mechanical friction and micro-friction wear in the axial direction of the roll pins (5) and (5)' do not occur at all. Therefore, all axial movement of the rolling parts is dry lubricated and eliminated.

As explained above, this invention has the following advantages: speed change; the left and right side pressure of the belt is kept uniform by a pair of movable conical plates facing each other, so no slipping occurs; By using dry metal to prevent this as much as possible, it is possible to obtain high shifting performance and maintain long-term stability. Therefore, it can be effectively applied to machines and devices that require high speed changeability, high responsiveness, high rotational accuracy, etc., such as automobile transmissions and main shaft transmissions for machine tools.

Furthermore, even when applied to devices that involve automatic control based on commands from electronics, it is extremely effective because the response is reliable.

[Brief explanation of drawings]

The drawings show an embodiment of the speed change pulley according to the present invention. Figure 1 is a sectional view when the speed change belt has the minimum pitch diameter, and Figure 2 is a cross section when the speed change belt has the maximum pitch diameter. It is a diagram. (1)...rotating shaft, (2), (2)'...movable conical plate, (3), (3γ...spring, (4) t
<4Y... Boss portion, (5), (5)'... Roll pin, (6). <6Y...Dry metal, (7), (7)'...
・Guide groove, (8), (8)'... Cylindrical body, (Q)
, (Q)'...Guide groove. Patent applicant Sakai Seisakusho Co., Ltd. Figure 1 Commissioner of the Patent Office Forgotten Lee L4? Hall 1. Display of the case 1939 Patent Application No. 171t7
7S No. 2, Title of the invention: Variable speed V-pulley 3, Person making the amendment Relationship with the case (patent) Applicant 4, Agent (4920) 6. Amendment. Subject: The scope of claims and detailed description of the invention in the specification. 7. Contents of the amendment Contents of the amendment A The entire scope of the claims in the specification will be amended as shown in the attached sheet. In the specification, page 3, line 6, there is a meeting that says ``freely rotate.''
"Rotate and slide freely" and also correct it to "loose fit" in line 1 O of the same page. 3. On the same page, page j, line ``freely rotates'' instead of ``freely rotates and slides'', and line g of the same page says ``loose fit''? Correct it to "loose fit". France Same, next to page 3, line λ, [Please note that dry metal means oil-less bearings with lubricating properties, such as plastics and oil-impregnated alloys. A pair of movable conical plates (2), (2Yk
The movable conical plates (2), (2y Roll pins (5), (5) on the boss parts (4), (4)'
``fr Dry metal (6), (6)' on its outer periphery
The roll pins (5) and (5)' are inserted in such a way that rotation and sliding can be easily performed therebetween, and both ends of the roll pins (5) and (5)' are connected to the rotation shaft (1).
Guide grooves (7) drilled in (7Y and the cylindrical body (s) which also serves as a spring receiver fixed to the rotating shaft (1), (8)' guide grooves (9), (9)' A variable speed V-pulley is characterized in that its movement in the axial direction is fully restricted and the variable-speed V-pulley is loosely fitted to allow transfer.

Claims (1)

[Claims] A pair of movable conical plates (2) l (2+'
The movable conical plates (2) and '(2Y) are arranged opposite each other with the movable conical plates (2) and '(2Y Boss part (4), roll pin (6) on C41, C5Y
is inserted into the outer periphery of the roll pin (
5) Guide grooves (7) drilled in both ends of I CBY on the rotating shaft (1), (7Y and a cylindrical body (8) that also serves as a spring receiver fixed to the rotating shaft (1)) Guide drilled in I C8Y groove(
Q), (Q)' A variable speed pulley characterized by restricting movement in the axial direction and not being loosely fitted to allow transfer.