Chain wave transmission

 

(57) Abstract:

The invention relates to the field of mechanical engineering. The flexible element is made in the form of two multi-row chains. The first circuit comprises one of its next fixed to the body of the toothed wheel, the other next to the first wheel of the wave generator. The second circuit of one of its next covers the second gear wheel of the wave generator, and the other follower wheel, made in the form of a gear wheel. The transmission is equipped with a balancer, which are located in the bores between the gear wheels being in mesh with the same flexible element. The technical result - the reduction of loads on the wave generator, increasing the efficiency of the transmission and the ability to protect it from overload. 1 C.p. f-crystals, 4 Il.

The invention relates to the field of engineering, namely to design wave chain drives, and can be used in programs with a large gear ratio.

Known wave gear (U.S. patent 2906143, CL 74-640) containing the wave generator, flexible and rigid gears.

The disadvantage of this gear are a significant burden on the wave generator and low Stoykova for the prototype, comprising a housing, benevolence on the body gear wheel, a drive shaft mounted therein a wave generator, made in the form of a hollow cylinder and mounted on the Cam drive shaft, a driven shaft with benevolence on it a gear wheel and a flexible element covering the wave generator and gears.

The disadvantage of this transmission are large radial load on the generator of waves that occur during the deformation of the flexible wheel, which reduces the efficiency of the transmission. In addition, the disadvantages include the fact that you need an additional mechanism to protect the transmission from overload.

The technical purpose of this invention is to reduce the load on the generator of waves, increasing the efficiency of the transmission and the ability to protect it from overload.

The technical problem is solved by the fact that the flexible element is made in the form of two multi-row chains, such as the stub roller, and the first circuit comprises one of its next fixed to the body of the toothed wheel, and the other near the first wheel of the wave generator, the second circuit of one of its next covers the second gear of the generator in the that are located in the bores between the gear wheels, located in engagement with the same flexible element.

The problem can be solved by the fact that the number of chain links Flex element selects at least one more than required to cover the gears, at least one link flexible element is out of engagement, ensuring that the outside of the circuit and forming a gap of a working circuit, on one axis of the chain link in place of the installed gap pad can be rotated, and the other axis of the chain link in the separation of the working section supported on springs, benevolence on the opposite side of the hole pads with screws.

A comparison of the claimed chain wave transmission is known, allows to make a conclusion about the achievement of a new effect, as manifested in the reduction of loads on the wave generator. This became possible due to the fact that the two multi-row chain, which is flexible elements, each one with their range covers the gears of the wave generator, and his other series include benevolence on the body of the gear wheel and the follower wheel.

The invention is illustrated by drawings, where:

in Fig.1 shows an axial slit chain wave transmission;

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Chain wave transmission (Fig.1, 2, 3, 4) includes a housing 1, in which zenevredo gear wheel 2 made in the form of asterisks. Drive shaft 3, the eccentric part, a wave generator 4, is made in the form of a hollow cylinder 5 with two toothed wheels 6 and 7 at the ends, made in the form of asterisks. On the driven shaft 8 zenevredo gear-sprocket 9. Flexible element 10 is designed as two multi-row circuits 11 and 12, for example, a bushing-roller. The device is provided with balancers 13, 14, rigidly mounted on the drive shaft 3, which are located in the bores between the gear wheels being in mesh with the same flexible element.

The number of links of the same chain, for example, the circuit 11, selects at least one more than required to cover the gears-sprockets 12 and 8. At least one chain link is not working, and on the axis 15 of the chain link adjacent to the outside of the circuit is installed, the pad 16 can be rotated. The other axis 17 of the chain link adjacent to the outside of the circuit supported on springs 18, 19, benevolence with the opposite free side holes pads screws 20, 21.

As the flexible element may be iseet as follows. During the rotation of the driving shaft 3, the wheel-sprocket 6, 7 mounted on the eccentric portion of the shaft 3, perform planetary motion, creating a rotating wave on the flexible elements of the circuits 11, 12. As the first circuit 11 one of its nearby is in engagement with a fixed wheel, the sprocket 2, the wheel-sprocket 6, 7 acquire a certain angular velocity. Follower wheel-sprocket 9 perceives as the wave movement of the chain 12, and the movement of the sprocket 7 wave generator. The angular velocity of the driven shaft4is determined by the ratio

< / BR>
where is the angular velocity of the drive shaft;

Z1the number of teeth of the gear-sprocket 2;

Z2the number of teeth of the gear-sprocket 6;

Z3the number of teeth of the gear-sprocket 7;

Z4the number of teeth of the gear-sprocket 9;

The eccentricity of the eccentric drive shaft 3 "e" is determined from the condition of transfer of the bushings of the chain through the top of the teeth of wheels, sprockets 2 and 9 and is determined by the system of inequalities:

,

where d1d2d3dD4- dividing the diameters of the wheels, sprockets, respectively 2, 6, 7, 9;

DE1DE4- the outer diameters of the wheels, sprockets, respectively, 2, 9;

DC1DC4- the diameters of circles of itadei increases, and the axis 17 of the chain link deforms the compression springs 18, 19 and moves along the groove made in the block 16. As a result the length of the loop circuit increases, and the overshoot of the teeth of the sprocket. The effort of the springs is regulated by the screws 20, 21.

The flexible elements made in the form of chains have constant tightness, due to the persistence length of a loop circuit that provides kinematic transmission accuracy.

The most effective transfer, in which the eccentricity "e" is less than the step chain. For example, when using a standard double-row chain PV-9,525 GOST 13568-75, when the number of teeth of the sprocket Z1=50, Z2=51, Z3=52, Z4=51. The eccentricity of the eccentric e=7,4 mm Gear ratio transmission

< / BR>
If you rearrange the stars and assign Z1=50, Z2=51, Z3=51, Z4=52, the gear ratio

< / BR>
Currently manufactured gearbox with gear ratio U=2601. Preliminary tests showed the efficiency of the proposed design.

Data transfer can be used in drives, winches, hoists, conveyors, and machines.

1. Chain wave transmission, comprising a housing, Sanogo cylinder and mounted on the Cam drive shaft, driven shaft with benevolence on it a gear wheel and a flexible element covering the wave generator and the gear wheel, wherein the flexible element is made in the form of two multi-row chains, such as the stub roller, and the first circuit comprises one of its next fixed to the body of the toothed wheel, and the other near the first wheel of the wave generator, the second circuit of one of its next covers the second gear wheel of the wave generator, and the other follower wheel, made in the form of gears, while the transmission is equipped with a balancer, which are located in the bores between the gear wheels, located in engagement with the same flexible element.

2. Transfer under item 1, characterized in that the number of chain links Flex element selects at least one more than required to cover the gears, at least one link flexible element is out of engagement, ensuring that the outside of the circuit and forming a gap of a working circuit, on one axis of the chain link in place of the installed gap pad can be rotated, and the other axis of the chain link in the separation of the working section supported on springs, benevolence from the opposite side

 

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