CN2045795U

CN2045795U - Cam running pulley speed reducer

Info

Publication number: CN2045795U
Application number: CN 89200007
Authority: CN
Inventors: 张家骥
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-01-04
Filing date: 1989-01-04
Publication date: 1989-10-11

Abstract

The utility model relates to a cam running pulley speed reducer which is equivalent to a harmonic drive reducer. A shock-wave generator is the cam which approximates an ellipse, and the moving trace is equivalent to the double-wave drive. A set of steel running pulleys and steel circle wheels compose a movable type outer roller gear which substitutes a flexible outer gear, and an inner roller gear substitutes an inner gear. The cam running pulley speed reducer has large drive power, small rolling friction and loss. The utility model has the advantages of small size, simple manufacturing process and big drive ratio. The drive ratio can be 5 to 1000. The cam running pulley speed reducer has no special requirement for the material, and the cost is 60% lower than the equal product. The cam running pulley speed reducer can be widely used for various industries, such as mines, the metallurgy, the machine-building and electronics industries, the petrochemical industry, the transport, etc.

Description

Cam running pulley speed reducer

The invention belongs to a kind of new type of cam roller retarder of mechanical train transmission device.

Harmonic Gears in prior art is the transmission that a kind of elasticity modification ripple that relies on gear causes, and major defect is very high to the material requirements of flexbile gear, and heat treatment and manufacturing process are complicated, and the manufacture cost height is failed popularization and application.

Through the preliminary search Patent document data, a kind of oscillating tooth harmonic wave speed reducing machine of having found 87206444 patent disclosures, it is that input shaft is connected with the double eccentric wheel that rolling bearing is housed by key that this model utility constitutes, movable teeth rack is provided with the closed trench hole that can allow oscillating tooth radially slide, and has the profilogram that matches with oscillating tooth on the fast pulley, and this curve is consistent with the movement locus of oscillating tooth, deficiency is that bearing is housed on the double eccentric wheel, constitute the double wave transmission with just many, amount of finish is big, the cost height; Open two row's sealing slotted holes on the movable teeth rack, sealing long hole processing technology difficulty is big, uses machine tool not process, and needs special purpose machine tool processing cost height; The profile line criteria of right and wrong of fast pulley, the complicated cost height of processing technology.

In view of the problem that exists in the above-mentioned prior art, task of the present invention is that a kind of bearing capacity of design is big, has the advantage of train, and workpiece is few, processes easyly, with low cost, is convenient to the cam bawl retarder of popularization and application.

Structure of the present invention such as Fig. 1 and Fig. 2, cam (2) by the shock wave generator sub-elliptical, on the circle wheel (12) of outer hobbing machine one group of cylindrical roller (4) is housed, interior hobbing machine is equipped with one group of cylindrical roller (6) and constitutes on circle wheel (7), and their three parts are concentric.

Upwards have square groove (18) in circle wheel (12) footpath, the end face of groove is equipped with end cap, by bolt, forms square through hole, and movable roller (4) is housed in through hole.Round wheel is made of one with output shaft, and interior hobbing machine has big semicircle through hole (19) cylinder type roller (6) is housed on circle wheel (7) is axial, and end cap (5) and (11) are equipped with in both sides, and by screw, the circle wheel is by being bolted on the housing (17).

The cam shock wave generator of single sub-elliptical is equivalent to the double wave transmission shock wave generator in the harmonic driving, external gear is equivalent to the compliant wheel external tooth, interior hobbing machine is equivalent to the rigidity internal tooth, the cam of sub-elliptical and input shaft (1) are coupled as one, when input shaft rotates, cam following, roller (4) produces displacement successively diametrically, one by one successively with the corresponding engagement of roller (6) of interior hobbing machine, because interior hobbing machine manys two or few two than the roller on the outer hobbing machine, two gear meshing districts are positioned at the both sides of sub-elliptical major axis, become the double wave transmission, so when cam turned over a week, outer hobbing machine turned over the spacing of two rollers to opposite direction, its velocity ratio be on the outer hobbing machine roller number 1/2nd, one of them fixes interior as required hobbing machine or outer hobbing machine, and another one and output shaft combine as a whole and do output, the cam of sub-elliptical, shock wave generator and outer hobbing machine also can be made two-row structure, and two generators interlace 180.Interior hobbing machine is shared, become four ripple transmissions, but velocity ratio and double wave transmission equate, thereby the meshing zone has increased by one times again, has improved transmitted power, helps increasing load, in order more to help improving load, can adorn the cylindrical roller more than 1 or 2 outside in the radially square hole of the circle wheel (12) of hobbing machine, thereby increase circle wheel (12) radial thickness, improve intensity.

The distinguishing feature of this device is that velocity ratio is big, generally can reach 5 to 1000, and unit load is little, bearing capacity height, between cog are rolling frictions, and composite curve radius is big, the oil film thickness that forms, anti-spot corrosion, wear-resistant ability is strong, the efficient height, durable reliable, the long service life cylindrical roller can adopt the standard roller, less demanding to material, do not need special process equipment, technology is easy, and volume is little, in light weight, cost reduces significantly, can be used for the rotation of positive and negative both direction, all in popularization and application, it is widely used in the mine, metallurgy, chemical industry electric mechanical, every profession and trades such as transportation.

Accompanying drawing 1 and Fig. 2 explanation:

1 is input shaft; 2 is the cam of sub-elliptical; 4 and 6 is cylindrical roller; 3 is outer hobbing machine end cap; 5 and 11 is interior hobbing machine end cap; 7 is the circle wheel of interior hobbing machine; 8,9,13,15 is bearing; 10,14 is oil sealing, and 12 is the annulus and the output shaft of interior hobbing machine, and 16,17 is casing; 18 is the square hole on the circle wheel of outer hobbing machine; 19 is the circle wheel big semicircle through hole of gear.

Claims

1, a kind of cam bawl retarder in the mechanical transmission, this retarder has input shaft (1) bearing (8) (9) (13) (15), casing (16) (17), the cam (2) that it is characterized in that the shock wave generator sub-elliptical, the circle wheel (12) and the end cap (3) of outer hobbing machine have one group of cylindrical roller (4), and interior hobbing machine is equipped with one group of cylindrical roller (6) and constitutes on circle wheel (7).

2, by the described cam bawl retarder of claim 1, it is characterized in that shock wave generator, the cam of sub-elliptical (2), inside and outside hobbing machine meshing zone is positioned at the both sides of sub-elliptical major axis, becomes the double wave transmission.

3, by the described cam bawl retarder of claim 1, it is characterized in that outer hobbing machine upwards has the groove (18) of square in circle wheel (12) footpath, the end face of groove is equipped with end cap, forms the square through hole, and movable cylindrical roller (4) is arranged in the square through hole.

4, by the described cam bawl retarder of claim 1, hobbing machine has big semicircle through hole (19) in it is characterized in that on circle wheel (7) is axial, and cylinder type roller (16) is housed, and end cap (5) and (11) are equipped with in both sides.

5, roll many two of the outer gear hobbing number of gear ratio in it is characterized in that by the described cam bawl retarder of claim 1.

6, by the described cam bawl retarder of claim 1, hobbing machine and outer hobbing machine in it is characterized in that, one of them and shell are fixed, and another one and output shaft combine as a whole and do output.

7, it is characterized in that by the described cam bawl retarder of claim 1,2 and 3 the cam shock wave generator of sub-elliptical and outer hobbing machine are the single two-row structure that also can be, two generators interlace 180, and interior hobbing machine is shared, becomes four ripple transmissions.

8,, it is characterized in that can adorn 1 in the round wheel radial square hole of outer hobbing machine also can be two cylindrical rollers of also going up by claim 1 and 3 described cam bawl retarders.