CN2524010Y - Lever-type stepless variable-speed devices - Google Patents

Abstract

The utility model discloses a lever-type stepless variable-speed device. The stander is provided with a lever, a group of glide rail, at least one screw and two gear shafts, one of the gear shafts can move the gear shaft that is provided with a rack below across the two gear shafts and to be articulated with the two gear shafts inside the guide hole of the glide rail glide frame. The rack shaft end is hinged with the sleeve on the driven arm of the lever, the sleeve on the driven arm of the lever is hinged with the connecting rod, the same ends of the two gear shafts are provided with homodromous overrunning couplers of which the outside gears are articulated with the gear which is provided with an output shaft. The utility model can fully utilize the power of the motor, save energy, reduce wearing, prolong service life and ensure safe operation.

Description

The Lever type stepless speed variator

The utility model relates to a kind of transmission device that an auxiliary lever is arranged.

Existing infinite variable speed transmission device generally all is to reach infinite variable speed purpose by the friction transmission, the transmission efficiency of this transmission device is low, the power that transmits is little, there is the people once to propose a kind of change fulcrum type lever type variable-speed regulator for this reason, this stepless speed variator is equipped with a change lever between driving wheel and driven wheel, change the velocity ratio of stepless speed variator by the position of the fulcrum that changes change lever, thereby reach infinite variable speed purpose, but the practicability of this stepless speed variator is relatively poor, because in the process of transmission particularly in the transmission process of high-power heavy load, the fulcrum of change lever is bearing very big active force, the position of the fulcrum that changes change lever is relatively required great effort, fixedly the position of the fulcrum of change lever is also relatively required great effort simultaneously, and only reach reciprocally swinging with lever and become that driven wheel is unidirectional to rotatablely move with a simple change lever, if the engagement by wheel and rack is impossible, if that leans on ratchet and ratchet can cause very big noise again, thereby be very difficult.

Task of the present utility model is that a kind of Lever type stepless speed variator that is easy to practical application and easy operating will be provided.

Task of the present utility model is finished like this: one group of slide rail also is housed except that lever is housed on the frame of the present utility model, at least one screw rod and two axis parallels and be separated with the gear shaft of certain distance mutually, balladeur train is arranged on the slide rail, article one, can in the guide hole of balladeur train, all there be the rack shaft of tooth bar from two gear shafts, to pass and be engaged with along the up-and-down motion top and bottom that balladeur train moves, one end of rack shaft and the sleeve that can slide on the slave arm of lever are hinged, the sleeve that on the master arm of lever, slides and a rod hinge connection that moves back and forth, the same end of two gear shafts respectively is equipped with a free wheel device, the external gear of two free wheel device housings all with a gear engagement that has output shaft.

Because the utility model is to utilize spiral to change the position of point of action of the weighing arm of lever, thereby it is except having the advantage of general stepless speed variator: can as far as possible reasonably utilize power, the saving energy consumption of motor, thereby need not during the conversion gear to advance the mechanical wear that retaining can reduce speed changer again after the first off-gear, increase the service life, but also has following exclusive advantage: in the high speed transmission of high-power, heavy load, can easily, conveniently, promptly advance and retreat and keep off, alleviate labor intensity of operating personnel, improve safety coefficient.

Be elaborated with drawings and Examples below.

Fig. 1 is an embodiment's of the utility model a schematic top plan view.Fig. 2 is the sectional view along the A-A line among Fig. 1.Fig. 3 is the sectional view along the B-B line among Fig. 1.Fig. 4 be among Fig. 1 C to view.

With reference to accompanying drawing, on the base plate 2 of the utility model frame 1, be fixed with first riser 3 and second riser 4, be fixed with one group of two cylinder slide rail 5 between two risers, 6 (an also available planker replaces two slide rails), a screw rod 7 (also can establish a screw rod on every slide rail) and two axis parallels are installed and are separated with the gear shaft 8 of certain distance mutually, 9, a balladeur train 10 is housed on every slide rail, 11, the guide hole vertical with the direction of slide rail 12 arranged on the balladeur train, 13, the shaft axis of two guide holes overlaps, preferably with two balladeur trains 10,11 affixed being integral reach synchronized movement with one heart to guarantee its guide hole.The axis direction of gear shaft is parallel with slide rail, and the nut 14 on screw rod 7 and the balladeur train 10 screws.Article one, on, tooth bar 15 is arranged below, 16 rack shaft 17 penetrates the guide hole 12 of balladeur train, 13 also can move therein, the tooth bar 15 of rack shaft top and bottom, 16 respectively with two gear shafts 8 up and down, 9 gear teeth meshing, sliding sleeve 20 on the slave arm 19 of one end of rack shaft and lever 1 θ is hinged by bearing pin 21, lever 18 is hinged on the frame by stand 22 and pivot pin 23, a slidably sleeve 25 also is housed on the master arm 24 of lever, this sleeve and a connecting rod that moves back and forth 26 are hinged by bearing pin 27, connecting rod 26 can in the hole of the guide plate on being fixed in base plate 2 28, slide (also sleeve 25 usefulness Cock screws can be fixed on the appropriate location on the master arm 24, cancel guide plate 28 simultaneously).The same end of two gear shafts 8,9 respectively is equipped with a free wheel device 29,30 that action direction is identical, the external gear of two free wheel device housings all meshes with a gear 32 that has output shaft 31, when two gear shafts 8,9 were done the rotation of positive and negative direction about rack shaft 17 moves back and forth and drives like this, gear 32 and output shaft 31 thereof can only be along the rotations of same direction. Free wheel device 29,30 and gear 32 can be installed by cantilever outside first riser 3 or second riser 4, but be preferably in first riser 3 or the 3rd riser 33 is fixed in second riser, 4 outsides again, free wheel device 29,30 and gear 32 are installed between first riser 3 or second riser 4 and the 3rd riser 33, to improve its strength and stiffness.A handwheel or gear 34 can be installed in the outer end that screw rod 7 stretches out, so that with manual or motor-driven turn screw rod.

During use, the driving wheel of connecting rod 26 with motor or motor is connected, the rotational transform of driving wheel is become the swing of lever 18 with this connecting rod, its slave arm 19 drives rack shaft 17 and does reciprocating linear motion, the tooth bar 15,16 of rack shaft top and bottom drives two gear shaft 8,9 rotations up and down that are engaged with, and two free wheel devicees, 29,30 driven gears 32 of its axle head are along the rotation of a fixing direction.With handwheel or gear 34 turn screw rods 7, but the position of rack shaft 17 between first riser 3 and second riser 4 regulated on continuous stepless ground, the also corresponding sliding sleeve of having adjusted on the lever slave arm 19 20 arrives the distance of lever pivot pin 23, thereby under the constant situation of the speed of driving wheel and lever, continuous stepless ground has changed the amplitude of fluctuation and the speed of rack shaft 17, so the also continuous stepless ground change thereupon of the speed of gear 32 and output shaft 31 thereof.

For improving the rigidity of frame, be preferably in and add a top board on base plate and the riser, be integral base plate, riser and top board are affixed, thereby frame is made a casing, whole device has just become a gearbox, has only handwheel, connecting rod and output shaft to stretch out outside the case, and other part is all interior, so both neat and artistic, be convenient to again lubricate.

Claims (2)

1, a kind of Lever type stepless speed variator, lever (18) is housed on the frame (1), it is characterized in that: one group of slide rail (5 also is housed on the frame (1), 6), at least one screw rod (7) and two axis parallels and be separated with the gear shaft (8 of certain distance mutually, 9), slide rail (5, balladeur train (10 is arranged 6), 11), article one, rack shaft (17) can be at balladeur train (10,11) guide hole (12, the up-and-down motion of moving along balladeur train 13), there is tooth bar (15 rack shaft (17) top and bottom, 16), rack shaft (17) is from two gear shafts (8,9) pass between and be engaged with, one end of rack shaft (17) and the sleeve (20) that can upward slide at the slave arm (19) of lever (18) are hinged, it is hinged with a connecting rod that moves back and forth (26) to go up the sleeve (25) that slides at the master arm (24) of lever (18), two gear shafts (8,9) same end respectively is equipped with a free wheel device (29 that action direction is identical, 30), the external gear of two free wheel device housings all meshes with a gear (32) that has output shaft (31).

2, by the described Lever type stepless speed variator of claim 1, it is characterized in that: affixed being integral of two balladeur trains (10,11) on two slide rails (5,6).

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