Worm-gear speed reducer
Technical field
The utility model relates to a kind of speed reducer, specifically is meant a kind of worm-gear speed reducer.
Background technique
Existing worm-gear speed reducer includes casing and rotatable worm gear and the worm screw that is sleeved in the casing; Through axis normal direction engaged worm and worm gear motor output shaft is carried out gearing down output; There is following problem in existing worm-gear speed reducer: (1) cabinet exterior is rectangular-shaped, some radiating fins is set, Heavy Weight on the outer wall; Complex structure cleans difficulty; (2) casing removes the power input hole and the power delivery outlet is outside equipped with tank filler sleeve and drain oil, leaks easily; (3) worm gear, worm screw mounting type are unreasonable, are easy to generate and rock etc.
Summary of the invention
The utility model provides that a kind of structure is light and handy, the worm-gear speed reducer of convenience for washing and liquid good leak tightness.
The technological scheme that the utility model adopts is: worm-gear speed reducer; Comprise casing and rotatable worm gear and the worm screw that is sleeved in the casing; Said casing has the power delivery outlet of a power input hole and a pair of perforation, and power input hole and power outlet aperture are provided with the liquid sealing device respectively; The worm screw front end stretches in the casing and with worm gear from the power input hole and meshes, and tail end has the spliced eye that is used to connect pto; Worm gear and worm screw are separately positioned on the direction of axis normal, and worm gear is hollow shape, have the penetration hole coaxial with the power delivery outlet, have keyway in the penetration hole; Cabinet wall has respectively the chamber with worm screw, worm gear Spielpassung, and cabinet exterior is cylindric in the worm gear mounting point.
Further, the worm screw mounting point of said cabinet exterior is cone table shape, directly contracts from worm screw tail end forward end direction.
Further, said casing is the removable adpting flange that is connected with at power input hole place, and adpting flange has the boss that stretches into casing power input hole.
Further, said adpting flange is connected with casing removable through two bolts that circumferentially are uniformly distributed with at least.
Further, the said adpting flange outside has installation base, is set with rubber pad on the installation base, and the rubber pad end face is concordant with adpting flange end face and outer rim respectively with outer rim.
Further, said worm gear and worm screw respectively are sleeved in the casing through pair of bearings is rotatable.
Further, said worm gear and worm screw are equipped with positioning step in the Bearing Installation position.
Further, said bearing is located through jump ring at the opposite side relative with positioning step.
Further, said bearing is a deep groove ball bearing.
Further, said liquid sealing device is an oil sealing.
The beneficial effect of the utility model is: housing structure is reasonable, and structure is light and handy and firm; Power input hole and power delivery outlet only are set and the reliable sealing seal arrangement is set, the liquid good leak tightness effectively prevents leakage of oil; Cabinet wall and worm gear, worm screw gap are little, and volume read-out is few; The linkage structure of worm gear and worm screw and casing is simple and reliable, and not only safety action was smooth and easy but also can prevent to rock the complete machine long service life.
Description of drawings
Fig. 1 is the internal structure schematic representation of the utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
See figures.1.and.2; Worm-gear speed reducer; Comprise casing 2 and the rotatable worm gear 13 and worm screw 9 that is sleeved in the casing, casing 2 has the power delivery outlet of a power input hole and a pair of perforation, and power input hole and power outlet aperture are provided with the liquid sealing device respectively; Worm screw 9 front ends stretch in the casing 2 and with worm gear 13 from the power input hole and mesh, and tail end has the spliced eye that is used to connect pto; Worm gear 13 is separately positioned on the direction of axis normal with worm screw 9, and worm gear 13 is hollow shape, has the penetration hole coaxial with the power delivery outlet, has keyway in the penetration hole; Casing 2 inwalls have respectively the chamber with worm screw 9, worm gear 13 Spielpassung, and casing 2 outer walls are cylindric in the worm gear mounting point.
Guarantee simultaneously that for further alleviating box weight structure is firm, the worm screw mounting point of casing 2 outer walls is cone table shape, directly contracts from worm screw tail end forward end direction.
For being connected with PTO quickly and easily, casing 2 is the removable adpting flange 7 that is connected with at power input hole place, and adpting flange 7 has the boss that stretches into casing power input hole.In the present embodiment, at least two bolts 6 and casing 2 removable are connected of adpting flange 7 through circumferentially being uniformly distributed with.For preventing the generation deformation that bumps of speed reducer and PTO, adpting flange 7 outsides have installation base, are set with rubber pad 8 on the installation base, and rubber pad 8 end faces are concordant with adpting flange 7 end faces and outer rim respectively with outer rim.
The worm gear 13 of present embodiment is through pair of bearings 12 rotatable being sleeved in the casing 2, and worm screw 9 is through pair of bearings 1 rotatable being sleeved in the casing 2.This assurance accurate positioning prevents to rock, and worm gear 13 is equipped with positioning step with worm screw 9 in the Bearing Installation position.Bearing also through the jump ring location, further improves action stability at the opposite side relative with positioning step.The bearing 1 and the bearing 12 of present embodiment are deep groove ball bearing.The liquid sealing device of present embodiment is an oil sealing 5.
Though the utility model is through illustrating and describe with reference to preferred embodiment; But those of ordinary skills should understand, and can be not limited to the description of the foregoing description; In the scope of claims, can do the various variations on form and the details.