CN2054111U - Frictional mechanical stepless speed variator - Google Patents

Abstract

The utility model discloses a frictional mechanical stepless speed variator, which comprises an input shaft and an output shaft that are positioned in the same shaft line, a plurality of planet cones that are evenly distributed at the surrounding of the common shaft line, an orbital ring, a pressurization ring, an output disc (speed regulating disk) and a support disk; the dynamic force is input via the pressurization ring and the support disk, and the planets do the revolution and rotation along the orbital ring driven by friction; the output disc is rotated by the basal plane friction of the planet cones, and the rotation speed of the output shaft can be altered by regulating the position of the output disc; the speed variator has two output characters: (1) the regulating range of the constant power output and the positive-negative hundreds of rotation / minute; (2) the middle output character of the constant power and constant torque, and the regulating range of 0-hundreds of rotation / minute. The utility model has the advantages of compact structure and small size.

Description

Frictional mechanical stepless speed variator

The utility model is a kind of planetary cone-shaped mechanical stepless transmission that relies on overall viewing range between part.

Japanese Xin Pu Industrial Co., Ltd released a kind of novel planetary bevel-type mechanical stepless transmission according to Japan Patent " clear 57-13221 " in 1982.This speed changer advantages such as slewing range is wide because of having, low speed end output torque is big are used widely.But this stepless speed variator does not change when turning to and can only unidirectionally export at motor.Being applied in needs the occasion of clockwise and anticlockwise motor to commutate, and the stationarity of equipment work is had harmful effect.In the machinery of industries such as the light industry of this external extensive employing mechanical stepless transmission, weaving, food, printing and dyeing, because speed changer generally is contained in device interior and then requires it to have as far as possible little volume.

The purpose of this utility model is to propose a kind of novel mechanical stepless speed change device using friction at the problems referred to above.The position that a this stepless speed variator common principle according to the present invention only changes orbit ring can draw two kinds of different output characteristics.The slewing range that wherein a kind of intermediate characteristic with the permanent power of permanent moment of torsion and 0-are hundreds of rev/mins, and small volume structure compactness.Another kind has constant power output characteristic, and rotating speed is adjustable continuously in positive and negative hundreds of rev/mins.

The utility model is achieved in that input and output shaft is on same axis.Around common axis, be uniform-distribution with some planet awls.(difference of planet of the present utility model awl and Japan Patent " clear 57-13221 " is that it has only two of the conical surface and bottom planes as the friction driving fundamental, and the bottom plane is parallel to the common axis of input and output shaft.) be fixed on orbit ring on the housing and rub in a side of the planet awl conical surface.Press ring rubs in the opposite side of the planet awl conical surface.Planet awl bottom surface then with output disc (being speed governing), supporting disk rubbing contact hereinafter to be referred as output disc.Butterfly spring stresses on the conical surface that planet is bored by press ring, makes planet awl bottom surface produce radial pressure to output disc and supporting disk.Input shaft can be imported power by press ring also can import power by supporting disk.Power input back planet is bored one side rotation one side along the orbit ring revolution, and rotates by bottom surface friction drive output disc.Output disc drives output shaft again and rotates.Axial adjustment output disc changes it and planet is bored the bottom surface position contacting, can make the output shaft rotating speed obtain adjusting.When orbit ring and planet awl conical surface position contacting during near conical surface top, hundreds of rev/mins of output speed 0-.When contact position at conical surface when middle part output speed about-400-+400 rev/min.

The utility model principle of uniformity according to the present invention has drawn the stepless speed variator of two kinds of different qualities.Wherein a kind of intermediate characteristic with the permanent moment of torsion of permanent power, hundreds of rev/mins of speed range 0-, and also volume is little, compact structure.Another kind has constant power output characteristic, and speed range is about-400-+400 rev/min.These two kinds of stepless speed variators can be widely used in the machinery of industries such as light industry, food, weaving, chemical industry.

The utility model concrete structure is provided by following three embodiments and accompanying drawing.

1, Fig. 1 is unidirectional output, the power sectional view from the speed changer of press ring input, manual governing.Fig. 4 is force analysis figure.Fig. 5 is its output characteristic curve.Butterfly spring (7) passes through bearing (6), press ring (4), planet awl (3) is pressurizeed.Make planet awl (3) bottom plane produce radial pressure to output disc (1) and supporting disk (5).Input shaft (8) revolves round the sun planet awl (3) by pressurization disk (4) input power along orbit ring (2) in rotation.Because the rotation and the revolution of planet awl (3), its bottom plane friction drives output disc (1) and rotates, and output disc (1) is passed to output shaft (11) to rotation by ball key (10) again.Axial adjustment output disc (1) changes its contact position with planet awl bottom surface can make output speed obtain adjusting.With reference to figure 4, in the present embodiment, orbit ring (2) contacts at a point with the conical surface of planet awl (3).Bore the bottom surface when the C point contacts when output disc (1) and planet, output speed is zero.Output disc (1) output speed that moves to left raises, and reaches the highest output speed when output disc (1) moves on to the d point.(hundreds of rev/mins approximately).

2, Fig. 2 is unidirectional output, the power sectional view from the speed changer of supporting disk input, manual governing.Fig. 4 is its force analysis figure.The present embodiment working principle is the same, and just power is imported by supporting disk.

3, Fig. 3 is forward and reverse output, the power sectional view from the speed changer of press ring input, electronic speed governing.Fig. 4 is its force analysis figure.Fig. 6 is its output characteristic curve.The present embodiment basic functional principle is the same, difference be " 1 " orbit ring (2) with the point of contact b of planet awl (3) at conical surface middle part.When output disc during at the e point output speed be zero.Output disc (1) output shaft (11) that moves to left motor shaft counter-rotating relatively, the output disc that moves to right (1) output shaft (11) just changes.Absolute value maximum when output disc output speed during at d point and c point." 2 " present embodiment is electronic speed governing.Pass to (14) given rotating speeds of screw mandrel by stepper motor (12) during work.The rotating speed of output shaft (11) is passed to small gear (being nut, hereinafter to be referred as small gear) (13) by canine tooth defeated (15).When small gear (13) and screw mandrel (14) when speed discrepancy is arranged small gear (13) move axially, and output disc (1) is also moved axially by gearwheel (15), thereby change output speed, small gear (13) rotating speed is changed, reduced the speed discrepancy of screw mandrel (14) with small gear (13), until last elimination, transmission output speed is stabilized on the setting value of stepper motor.

Claims (3)

1, a kind of mechanical stepless speed change device using friction, around the common axis of input shaft and output shaft, be uniform-distribution with some planets awls, it is characterized in that: the fundamental of planet awl friction driving has only two of the conical surface and bottom planes, and its bottom plane is parallel to the common axis of input shaft and output shaft.

2, speed changer according to claim 1, it is characterized in that: a side and the orbit ring rubbing contact opposite side and the press ring rubbing contact that are fixed on the housing of the planet awl conical surface, the bottom surface is the speed disk rubbing contact near orbit ring one side and output disc, and opposite side contacts with supporting disk.

3, according to claim 1,2 described speed changers, it is characterized in that: output disc is that speed disk is that nut, screw mandrel and stepper motor output shaft link by gearwheel, small gear.

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