CN209856310U

CN209856310U - Low-noise worm gear reduction box

Info

Publication number: CN209856310U
Application number: CN201822178805.1U
Authority: CN
Inventors: 杜晓晨
Original assignee: Denke Electric Machinery (taicang) Co Ltd
Current assignee: Denke Electric Machinery (taicang) Co Ltd; Dunkermotoren Taicang Co Ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2019-12-27
Anticipated expiration: 2028-12-25

Abstract

The utility model discloses a low-noise worm gear reduction box, which is characterized by comprising a box body, a worm gear, a worm and a transmission shaft which are arranged in the box body, wherein the worm drives the worm gear to move, and further drives the transmission shaft to rotate; the worm wheel comprises a tooth surface and a core, wherein the tooth surface is fixedly connected with the core, the tooth surface is made of plastic, and the core is made of metal. The utility model discloses on the basis of traditional reducing gear box, combine together through plastics flank of tooth and metal core to set up convex tooth limit on the flank of tooth, when guaranteeing big moment of torsion high strength output, reduced wearing and tearing, prolonged life, and reduced the noise, thereby promoted the product quality.

Description

Low-noise worm gear reduction box

Technical Field

The utility model relates to a reducing gear box field, in particular to low noise worm gear reducing gear box.

Background

The reduction box is the indispensable component part in the motor drive, plays the effect of slowing down and increasing the turn round, and the worm gear reduction box can change the transmission direction of motor shaft, has reduced the axial size of output. However, due to the characteristic of friction transmission between worm gears, the traditional metal worm gear reduction box often generates larger noise in the transmission process; in addition, long-time friction also affects the service life and transmission precision of the worm gear; because the plastic material has lower plastic toughness, the worm gear reduction box made of the plastic material cannot meet the requirement of corresponding tooth root bending strength, and the connection between the worm gear and the output shaft is easy to slip and cannot meet the requirement of large torque. With the large-scale promotion of industrial automation, the traditional worm reduction gearbox with noise and short service life cannot meet the increasing market demand.

SUMMERY OF THE UTILITY MODEL

Aiming at overcoming the defects of the prior art, the utility model discloses a low-noise worm and gear reduction box, which comprises a box body, a worm gear, a worm and a transmission shaft, wherein the worm gear, the worm and the transmission shaft are arranged in the box body;

the worm wheel comprises a tooth surface and a core, wherein the tooth surface is fixedly connected with the core, the tooth surface is made of plastic, and the core is made of metal.

Further, the tooth surface is made of a polyoxymethylene material.

Further, the tooth surface and the core are fixed by crimping.

Further, the core is made of one of iron, stainless steel, gray cast iron, aluminum bronze alloy, tin bronze alloy and microcrystalline alloy.

Further, the oblique tooth single side of the tooth surface is provided with a circular arc tooth edge.

Further, the helical teeth and the tooth edges are integrally formed.

Further, the normal pressure angle α of the tooth flank is 11 °, and the helix angle is 11.18.

The utility model discloses the beneficial effect who gains:

(1) the worm wheel adopts a mode that a tooth surface plastic material is in compression joint with a core metal material, and when the worm wheel is in meshing transmission with the worm, the noise and the abrasion of the worm wheel and worm transmission are effectively reduced. In addition, the high-strength transmission at the tooth surface is ensured, and simultaneously, the center of the worm wheel and the output shaft are effectively combined, so that the high-torque output of the worm and gear reduction box under the high strength is ensured.

(2) The arc-shaped tooth edges are arranged between the helical teeth of the tooth surface, so that the stress on the worm wheel is dispersed, and the strength and reliability of the worm wheel teeth are enhanced.

(3) Therefore, the utility model discloses on the basis of traditional reducing gear box, combine above-mentioned improvement, when guaranteeing big moment of torsion high strength output, reduced wearing and tearing, prolonged life to the noise has been reduced, thereby has promoted the product quality.

Drawings

FIG. 1 is a schematic view of a conventional worm gear;

FIG. 2 is a schematic structural view of a low noise worm gear reduction box of the present invention;

FIG. 3 is a schematic view of a worm gear;

the reference numbers are as follows:

1. worm wheel, 2, worm, 3, transmission shaft, 11, tooth surface, 12, core, 111, helical tooth, 112, tooth edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1, which is a schematic view of a structure of a worm wheel in a conventional reduction gearbox; the worm wheel is integrated into one piece, and the surface of worm wheel 1 evenly is provided with skewed tooth 111, and worm wheel 1 is whole to be made for same material. The worm is meshed with the worm wheel 1 for transmission, so that the worm wheel 1 is driven to rotate, and the transmission direction is changed.

The utility model discloses a low noise worm gear reducing gear box, as shown in fig. 2-3, including the box, worm wheel 1, worm 2 and the transmission shaft 3 of setting in the box, the meshing is connected between worm wheel 1 and the worm 2, and motor drive worm 2 rotates, and then drives worm wheel 1 and rotate, and transmission shaft 3 is connected with worm wheel 1 transmission, rotates through worm wheel 1 and drives transmission shaft 3 and rotate.

The worm wheel 1 comprises a tooth surface 11 and a core 12, and the tooth surface 11 and the core 12 are fixedly connected in a compression joint mode, wherein the tooth surface 11 is made of plastic, and the core 12 is made of metal, such as iron, stainless steel, gray cast iron, aluminum bronze alloy, tin bronze alloy and microcrystalline alloy. The mode that the tooth surface 11 is made of plastic and the core 12 is made of metal is adopted, so that high-strength transmission at the tooth surface is ensured, the worm gear core is not effectively combined with the transmission shaft 3, and the output of large torque of the reduction gearbox is ensured; in addition, when the tooth surface 11 is made of plastic materials and is in meshing transmission with the worm 2, the noise and abrasion of worm and gear transmission can be effectively reduced. Preferably, the tooth surface 11 is made of polyoxymethylene.

The tooth surface 11 is provided with oblique teeth 111 which are uniformly distributed, and a circular arc-shaped tooth edge 112 is arranged on one side between every two adjacent oblique teeth 111. Preferably, the normal pressure angle α of the tooth flank is 11 ° and the helix angle is 11.18. In addition, the helical teeth 111 and the tooth edge 112 are integrally formed, so that the strength between the helical teeth 111 and the tooth edge 112 can be ensured. Through test tests, the maximum tooth root bending strength of the traditional worm gear is 39.134MPa, the maximum tooth root bending strength after improvement is 34.520MPa, and the maximum tooth root bending strength is reduced by 11.97 percent compared with the traditional maximum tooth root bending strength. The test data above is the maximum allowable bending strength measured at the root of the worm gear for the same gear ratio.

The utility model discloses the beneficial effect who gains:

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims

1. A low-noise worm gear reduction box is characterized by comprising a box body, a worm gear, a worm and a transmission shaft, wherein the worm gear, the worm and the transmission shaft are arranged in the box body;

the worm wheel comprises a tooth surface and a core, wherein the tooth surface is fixedly connected with the core, the tooth surface is made of plastic, and the core is made of metal;

and arc tooth edges are arranged on one sides of the oblique teeth of the tooth surface.

2. The low noise worm and gear reduction box according to claim 1, wherein the tooth surface is a polyoxymethylene material.

3. The low noise worm and gear reducer as defined in claim 1, wherein the tooth surface and the core are fixed by compression joint.

4. The low noise worm and gear reducer according to claim 1, wherein the core is made of one of iron, stainless steel, gray cast iron, aluminum bronze alloy, tin bronze alloy and microcrystalline alloy.

5. The low noise worm and gear reducer according to claim 1, wherein the helical teeth and the tooth edges are integrally formed.

6. The low noise worm and gear reducer as defined in claim 1, wherein the normal pressure angle α of the tooth flank is 11 ° and the helix angle is 11.18 °.