CN203272730U

CN203272730U - Worm reduction gear unit for motor

Info

Publication number: CN203272730U
Application number: CN 201320062043
Authority: CN
Inventors: 玉国成
Original assignee: Foshan Welling Washer Motor Manufacturing Co Ltd
Current assignee: Foshan Welling Washer Motor Manufacturing Co Ltd
Priority date: 2013-02-01
Filing date: 2013-02-01
Publication date: 2013-11-06
Anticipated expiration: 2023-02-01

Abstract

The utility model relates to a worm reduction gear unit for a motor. The worm reduction gear unit comprises a revolving shaft, a gear arranged on the revolving shaft and a bearing which is arranged on the revolving shaft and synchronously rotates along with the gear; the worm reduction gear unit further comprises a retainer ring, wherein the revolving shaft is provided with a neck, and the retainer ring is clamped in the neck and is propped against the bearing. The worm reduction gear unit is simpler in installation way, stable in operation, low in noise, simple in structure, stable in quality, and convenient to operate, effectively prevents the upper and lower movement of the gear and the radial swing of the gear, improves the production yield of the whole motor, reduces the operation difficulty of the workers, and saves materials.

Description

The gear on worm speed reducer that is used for motor

Technical field

The utility model is a kind of gear on worm speed reducer for motor.

Background technique

At present, how the gear on worm speed reducer installs gear in the following way:

One, the mode that rolling bearing is installed is adopted at the gear two ends, and the output torque end is the shaft extension structure, overlaps upper spline or gear on output shaft again.The advantage of this technology is that double rolling bearing supports, and mechanism stable during the gear operation swings littlely, and noise is low; Shortcoming is service load, and cost is high.

Two, adopting an end is rolling bearing, and rolling bearing is enclosed within down and covers fixingly, and another output torque end is single rolling bearing structure of spline.The advantage of this technology is simple in structure, directly spline output; Shortcoming be gear operation because of single bearing bearing oil clearance, it is larger that turbine swings, noise is unstable.

Therefore, be necessary to provide a kind of new gear on worm speed reducer to address the above problem.

Summary of the invention

The purpose of this utility model is to consider the problems referred to above and a kind of simple to operate, gear on worm speed reducer that gear operates steadily is provided.

For achieving the above object, the technical solution of the utility model adopts following scheme: a kind of gear on worm speed reducer for motor, the bearing that comprises rotating shaft and be installed on the gear in described rotating shaft and be installed in described rotating shaft and rotate with described gear synchronous, described gear on worm speed reducer also comprises back-up ring, described rotating shaft is provided with draw-in groove, and described back-up ring is stuck in described draw-in groove and props up described bearing.

The utility model advantage compared with prior art is: mounting type is more succinct, effectively avoided gear up and down play and gear to radially wobble, speed reducer operates steadily, noise is low, improve noise and the production up-to-standard rate of complete machine, simple in structure, steady quality, easy to operate, reduce workman's operation easier, saving material.

Description of drawings

Fig. 1 is the mounting structure figure of the speed reducer of the utility model gear on worm deceleration.

Fig. 2 is the sectional view of the speed reducer B-B along the line of gear on worm deceleration shown in Figure 1.

Fig. 3 is the speed reducer part-structure schematic diagram that gear on worm shown in Figure 1 slows down.

Fig. 4 is speed reducer another part structural representation that gear on worm shown in Figure 1 slows down.

Fig. 5 is the explosive view of the speed reducer of gear on worm deceleration shown in Figure 1.

Embodiment

Below in conjunction with drawings and Examples, the utility model is done further detailed description:

Please refer to Fig. 1 to Fig. 5, the utility model is the speed reducer that a kind of gear on worm for motor slows down, and comprises rotating shaft 5, worm screw 6, gear 7, lower cover 2, bearing 3 and back-up ring 4.Bearing 3 in the present embodiment is oil-impregnated bearing, and the rolling bearing of prior art, use oil-impregnated bearing can make the speed reducer operation more steady relatively.Rotating shaft 5 is fixed in gear 7 in the heart, and lower cover 2 is positioned at gear 7 central positions and offers center hole 22, and oil-impregnated bearing 3 outer ring close-fittings are enclosed within lower cover 2 center holes 22, and rotating shaft 5 is synchronously rotated with gear 7 in oil-impregnated bearing 3; When gear 7 rotates, for preventing up play of gear 7, rotating shaft 5 is provided with a draw-in groove 51, and during assembling, back-up ring 4 is stuck in described draw-in groove 51 and props up oil-impregnated bearing 3.Gear 7 has and the contacted boss of the end face of bearing 3.

During installation, oil-impregnated bearing 3 is compressed into 21 li of lower cover 2 center holes, oil-impregnated bearing 3 outer rings and lower cover 2 close-fittings, and oil-impregnated bearing 3 firmly is fixed on lower cover 2 like this; Lower cover 2 assemblies that press oil-impregnated bearing 3 are fixed on motor 8 end faces with screw 9, connecting worm 6 on motor 8 output shafts 1, gear 7 assemblies that assemble rotating shaft 5 are enclosed within lower cover 2 on oil-impregnated bearing 3, last back-up ring 4 is stuck on rotating shaft 5 draw-in grooves at lower cover 2 rear portions fixing, total is fine up and down play when having solved gear 7 and rotating has guaranteed the stationarity of gear 7 runnings.

In the present embodiment, described gear 7 output terminals are and the spline structure shape of gear 7 one that rotating shaft 5 is Spielpassung with oil-impregnated bearing 3 endoporus, to guarantee that axle is in the interior smooth operation of oil-impregnated bearing 3.

In the implementation case, gear 7 output terminals can be spline structure, tube-in-tube structure or the profile of tooth way of output.

Claims

1. gear on worm speed reducer that is used for motor, the bearing that comprises rotating shaft and be installed on the gear in described rotating shaft and be installed in described rotating shaft and rotate with described gear synchronous, it is characterized in that: described gear on worm speed reducer also comprises back-up ring, described rotating shaft is provided with draw-in groove, and described back-up ring is stuck in described draw-in groove and props up described bearing.

2. the gear on worm speed reducer for motor according to claim 1, it is characterized in that: described gear on worm speed reducer also comprises the lower cover with center hole, described center hole is positioned at described Gear center position, and described bearing outer ring fastens in the center hole of described lower cover.

3. the gear on worm speed reducer for motor according to claim 2, it is characterized in that: described gear has and the contacted boss of the end face of described bearing.

4. the gear on worm speed reducer for motor according to claim 1, it is characterized in that: the output terminal of described gear is spline structure.

5. the gear on worm speed reducer for motor according to claim 1, it is characterized in that: described bearing is oil-impregnated bearing.