CN210623511U

CN210623511U - Worm gear structure

Info

Publication number: CN210623511U
Application number: CN201921411645.9U
Authority: CN
Inventors: 乔海军; 刘旭
Original assignee: Taizhou Junrui Auto Parts Co Ltd
Current assignee: Taizhou Junrui Auto Parts Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-05-26
Anticipated expiration: 2029-08-28

Abstract

The utility model discloses a worm gear structure, worm wheel and worm including meshing connection each other, the middle part is equipped with interior concave surface, its characterized in that on the tooth of worm wheel: the worm wheel comprises two single half worm wheels which are symmetrically arranged and spliced, the two single half worm wheels divide the inner concave surface equally, and the two single half worm wheels are formed by injection molding through the same mold and can be mutually fixed and spliced to form a complete worm wheel.

Description

Worm gear structure

Technical Field

The utility model belongs to the technical field of machinery, a worm gear structure is related to, especially a worm gear structure for on automobile-used executor reduction gears.

Background

The transmission mechanism in the actuator speed reducing mechanism for the vehicle is generally a bevel gear and worm transmission as shown in fig. 1, and the transmission of force is realized by the meshing connection between a bevel gear 1 and a worm 2, but the problems are that: the meshing is point contact, the transmission stability is poor, the torque is reduced, the transmission effect is poor, the transmission effect is reduced, and the meshing noise is increased. In order to overcome the problems, the helical gear and worm transmission mechanism is changed into a worm gear and worm structure shown in fig. 2, the worm gear and worm structure comprises a worm wheel and a worm 2 which are in meshed connection, a plurality of uniformly arranged teeth are arranged on the worm wheel, gaps are formed among the teeth, an inner concave surface 31 is arranged in the middle of each tooth, and the inner concave surface 31 is in contact connection with (namely surface meshed with) a screw surface during meshed transmission. This structure can improve transmission stability, improve the purpose of moment of torsion transmission efficiency and noise reduction, but has other problems: the worm gear is usually produced by adopting an injection molding process, and the worm gear structure cannot be demoulded, thereby bringing great problems in production. And current split type worm wheel needs two moulds to carry out the head sight respectively, has improved the cost of mould purchase like this, and carelessly mixes two kinds of different single half wormgear of type form together, can increase the assembly degree of difficulty of worm wheel.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a worm gear structure that can make the worm wheel easy drawing of patterns and be convenient for assembly when adopting injection molding process to make.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a worm gear structure, includes worm wheel and the worm that meshes the connection each other, the middle part is equipped with interior concave surface on the tooth of worm wheel, its characterized in that: the worm wheel comprises two single half worm wheels which are symmetrically arranged and spliced, the two single half worm wheels divide the inner concave surface equally, and the two single half worm wheels are formed by injection molding through the same mold and can be mutually fixed and spliced to form a complete worm wheel. The two single half-worm wheels can be connected through glue or riveted and fixed through other connecting pieces.

Through adopting foretell technical scheme, the worm wheel includes that two symmetries set up single half-worm-gear amalgamation forms to can reduce the cost of injection mold purchase, also need not to worry the condition that increases the assembly degree of difficulty behind the single half-worm-gear mixture.

The utility model discloses further set up to: the splicing surface of the single-half worm wheel is provided with an arc-shaped notch, and the circular angle of the arc-shaped notch is 120-90 degrees; and arc-shaped convex blocks matched with the notches are arranged on the splicing surfaces of the single half worm wheels, and the convex blocks and the notches are symmetrically arranged on the splicing surfaces.

By adopting the technical scheme, the two single half-worm wheels can be well guided in the splicing process, and the assembly efficiency is further improved.

The utility model discloses further set up to: the splicing surface is provided with a plurality of coaxially arranged notches with diameters gradually increased from inside to outside, the number of the convex blocks is equal to that of the notches, and the convex blocks are coaxially arranged and the diameters gradually increased from inside to outside.

By adopting the technical scheme, the combination strength of the two single half worm gears can be improved by arranging the plurality of notches and the plurality of protrusions; facilitating the transfer of torque.

The utility model discloses further set up to: the depth of the notch is less than or equal to one third of the thickness of the single half worm wheel.

The utility model discloses further set up to: a plurality of arc-shaped notches and convex blocks are arranged on the left side of the splicing surface of the single-half worm wheel, the circular angle between the arc-shaped notch and the convex block notch is 120-90 degrees, the notches and the convex blocks are coaxially arranged and distributed in a staggered manner, and the arc-shaped diameters are gradually increased from inside to outside; the right side of the splicing surface of the single half worm wheel is provided with a plurality of notches and lugs which are distributed in a staggered manner and have gradually increasing diameters; the right side is the lug with the same diameter and the same adaptation when the left side is the notch on the same diameter, and the right side is the notch with the same diameter and the adaptation when the left side is the lug.

Drawings

FIG. 1 is a schematic diagram of a helical gear and worm drive in the prior art;

FIG. 2 is a schematic view of a prior art worm gear drive configuration;

fig. 3 is a schematic view of a worm wheel according to a first embodiment of the present invention;

fig. 4 is a schematic view of a worm wheel structure according to a second embodiment of the present invention;

reference numbers in the drawings and corresponding part names: 1-helical gear, 2-worm, 3-worm wheel and 31-inner concave surface; 32-single half worm wheel, 4-notch, 5-lug.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

The utility model provides a 3 worm 2 structures on worm wheel, includes worm wheel 3 and the worm 2 of meshing connection each other, the middle part is equipped with interior concave surface 31 on the tooth of worm wheel 3, its characterized in that: the worm wheel 3 comprises two single half worm wheels 32 which are symmetrically arranged and spliced, the two single half worm wheels 32 divide the concave surface 31 equally, and the two single half worm wheels 32 are formed by injection molding through the same mold and can be mutually fixed and spliced to form the complete worm wheel 3. The two single half-worms 32 may be joined by glue or riveted by other joining means.

Through adopting foretell technical scheme, worm wheel 3 includes that the half single worm wheel 32 amalgamation that two symmetries set up forms to can reduce the cost of injection mold purchase, also need not to worry the half single worm wheel 32 and mix the back and increase the condition of the assembly degree of difficulty.

As shown in fig. 3, the present invention is further configured as follows: an arc-shaped notch 4 is formed in the splicing surface of the single-half worm wheel 32, and the circular angle of the arc-shaped notch 4 is 120-90 degrees; and the splicing surface of the single half worm wheel 32 is provided with an arc-shaped lug 5 matched with the notch 4, and the lug 5 and the notch 4 are symmetrically arranged on the splicing surface.

By adopting the technical scheme, the two single half-worm wheels 32 can be well guided in the splicing process, and the assembly efficiency is further improved.

The utility model discloses further set up to: the splicing surface on be provided with a plurality of coaxial settings and diameter from inside to outside notch 4 that increase gradually, the quantity of lug 5 equals the quantity of notch 4, a plurality of lugs 5 are coaxial settings and diameter from inside to outside and increase gradually step by step.

By adopting the technical scheme, the combination strength of the two single half worm gears 32 can be improved by arranging the plurality of notches 4 and the plurality of convex blocks; facilitating the transfer of torque.

The utility model discloses further set up to: the depth of the notch 4 is less than or equal to one third of the thickness of the single half worm gear 32.

Example two

The utility model provides a 3 worm 2 structures on worm wheel, includes worm wheel 3 and the worm 2 that mesh connection each other, the middle part is equipped with interior concave surface 31 on the tooth of worm wheel 3, its characterized in that: the worm wheel 3 comprises two single half worm wheels 32 which are symmetrically arranged and spliced, the two single half worm wheels 32 divide the concave surface 31 equally, and the two single half worm wheels 32 are formed by injection molding through the same mold and can be mutually fixed and spliced to form the complete worm wheel 3. The two single half-worms 32 may be joined by glue or riveted by other joining means.

As shown in fig. 4, the present invention is further configured as follows: a plurality of arc-shaped notches 4 and lugs 5 are arranged on the left side of the splicing surface of the single-half worm wheel 32, the circular angle between the arc-shaped notch 4 and the lug 5 is 120-90 degrees, the notches 4 and the lugs 5 are coaxially arranged and distributed in a staggered manner, and the arc-shaped diameters are gradually increased from inside to outside; the right side of the splicing surface of the single half worm wheel 32 is provided with a plurality of notches 4 and lugs 5 which are distributed in a staggered manner and have gradually increasing diameters; the right side is the lug 5 that the diameter is equal and the looks adaptation when the left side is notch 4 on same diameter, and the right side is the notch 4 that the diameter is equal and the looks adaptation when the left side is lug 5.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a worm wheel (3) worm (2) structure, includes worm wheel (3) and worm (2) that mesh connection each other, the middle part is equipped with interior concave surface (31) on the tooth of worm wheel (3), worm wheel (3) are formed including half single worm wheel (32) amalgamation that two symmetries set up, two half single worm wheel (32) are equallyd divide its characterized in that with foretell interior concave surface (31): the two single half worm gears (32) are formed by injection molding of the same mold and can be mutually fixed and spliced to form a complete worm gear (3); an arc-shaped notch (4) is formed in the splicing surface of the single half worm wheel (32), and the circular angle of the arc-shaped notch (4) is 120-90 degrees; an arc-shaped convex block (5) matched with the notch (4) is arranged on the splicing surface of the single half worm wheel (32), and the convex block (5) and the notch (4) are symmetrically arranged on the splicing surface; a plurality of notches (4) which are coaxially arranged and gradually increase in diameter from inside to outside are arranged on the splicing surface of the single half worm wheel (32), the number of the convex blocks (5) is equal to that of the notches (4), and the convex blocks (5) are coaxially arranged and gradually increase in diameter from inside to outside; the depth of the notch (4) is less than or equal to one third of the thickness of the single half worm wheel (32).