CN201502683U

CN201502683U - Combined gear

Info

Publication number: CN201502683U
Application number: CN2009200627192U
Authority: CN
Inventors: 陈翊柜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-21
Filing date: 2009-08-21
Publication date: 2010-06-09
Anticipated expiration: 2019-08-21

Abstract

The utility model relates to the technical field of gears, in particular to a combined gear. The combined gear consists of a plurality of same gear sheets which are overlapped and coincide completely and are fixed by a fastener so as to form the gear. The surface of the gear is coated with a coating layer. As the combined gear is combined by a plurality of the gear sheets which are formed by stamping a metal plate, cutting machining is not needed, the production efficiency is high, the production cost can be reduced greatly, and the combined gear is more applicable to batch production. Secondly, the surface of the gear is coated with the coating layer which can effectively eliminate the impact force which is generated at the contact moment when the gear rotates at high speed, thus reducing the meshing noise of the gear and having wear resistance and long service life. Thirdly, the combined gear has simple structure, easy assembly and combination and high integral strength, namely, the combined gear can achieve the strength of a gear made of metal, transmits large torque, has the advantages of a plastic gear and can be widely applied to products of daily production, life, toys and the like.

Description

Built up gear

Technical field:

The utility model relates to the gear product technical field, refers in particular to a kind of built up gear that is constituted by some stamping forming gear thin slices.

Background technique:

In the transmission used gear particularly metal gear generally form with a whole block material cutting, these processing methods can be divided into forming method and generating cutting by principle, specifically comprise again: gear hobbing, gear shaping, skiving, mill teeth, gear-shaping, draw manufacture methodes such as tooth.Though the method for these cutting can reach high machining precision, work efficiency is low, to having relatively high expectations of material, equipment, thereby the manufacture cost height, after machining, also to carry out complicated heat place, make complexity, generation time is long, the cost height.

Second kind of Gear Processing mode be with sheet metal by the direct impact briquetting of punch press, though the gear steady quality of making, efficient height, but the thickness of sheet metal has very large influence to processing.The thin easy punching press of sheet material, but when the thickness of this sheet metal reaches certain numerical value, in stamping engineering, be difficult to impact briquetting.

The third gear manufacture is to produce gear by the mode of casting, but this manufacture is only at the bigger gear of manufacturing dimension.

In addition, in products such as some daily lifes, production, toy, also often need to use gear, because these products are not high to the requirement of strength of gear, so adopt plastic material injection moulding manufacturing usually.This plastic cement gear cost is low, running noise is little, is widely used.But its maximum shortcoming is exactly an insufficient strength, damages easily.

The model utility content:

Technical problem to be solved in the utility model is to overcome the existing deficiency of the said goods exactly, a kind of impact force that can eliminate gear in the contact moment generation of high speed rotating effectively is provided, reduce the gear engagement noise, the built up gear of the long service life of gear.

For solving the problems of the technologies described above, the utility model has adopted following technological scheme: this built up gear is superimposed together by several pieces identical gear thin slices with overlapping fully, and by gear of the fixing formation of fastening piece.

Described gear thin slice is provided with the positioning hole of installing for fastening piece.

Described gear thin slice is provided with the axis hole of installing for gear shaft.

The quantity of described positioning hole is more than two.

Described gear thin slice adopts sheet metal to be stamped to form.

Described fastening piece is rivet or is plastic rod.

The surface of described gear is coated with one deck clad, and this clad adopts plastic material, for example nylon material.

After adopting technique scheme, the utlity model has following advantage:

1, the utility model is to be combined by several pieces gear thin slices that adopt sheet metal to be stamped to form, and need not to carry out cutting, and the manufacturing efficiency height can reduce manufacture cost greatly, is more suitable for producing in batches.

2, the utility model is coated with one deck clad at gear surface, and this clad can be eliminated the impact force of gear in the contact moment generation of high speed rotating effectively, reduces the gear engagement noise, abrasion performance, long service life.

3, the utlity model has simple in structurely, Assembly is easy, and the bulk strength height promptly can reach the intensity of metal license gear, transmits than high pulling torque, has the advantage of plastic cement gear simultaneously, can be widely used in the products such as daily production, life, toy.

Description of drawings:

Fig. 1 is a stereogram of the present utility model;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is the utility model middle gear thin slice and fastening piece connection diagram;

Fig. 4 is the stereogram of the utility model middle gear thin slice;

Fig. 5 is the perspective exploded view of Fig. 3.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described:

See shown in Fig. 1～5 that present embodiment has adopted eight gear thin slices 1 that adopt sheet metal to be stamped to form.Its material can adopt steel plate, iron plate or other sheet alloys, the gear thickness that the quantity of gear thin slice can be processed as required and decide for example five, six etc.

Particularly:

The size of eight plate gear thin slices 1, shape are stacked with overlapping fully in the present embodiment, and by gear 3 of rivet formation as fastening piece 2, in riveted joint, adopt interference fit between rivet and the positioning hole 12, and the length of rivet is identical with the thickness of eight plate gear thin slices 1, after eight plate gear thin slices 1 were fixed, the rivet two ends just can not protruded at its two ends like this.

Above-mentioned rivet as fastening piece 2 also can perhaps be filled plastic rubber material by injection molding way with replacements such as plastic rods in positioning hole 12, connect into eight plate gear thin slices 1 as a whole.

Positioning hole 12 is provided with three in the present embodiment, and it can be provided with the positioning hole 12 of suitable quantity as required, and the quantity of positioning hole 12 remains on more than 2 usually.

This gear thin slice 1 correspondence is provided with three positioning holes of installing for rivets 12, this positioning hole 12 be shaped as circle, it also can adopt circle to wait other shapes.This gear thin slice 1 correspondence is provided with the axis hole of installing for gear shaft 13, this axis hole 13 be shaped as triangle, firmly be connected to make gear shaft form with axis hole 13.Certainly, axis hole 13 also can adopt other shapes.

In addition, the surface of the gear 3 that constitutes at above-mentioned eight plate gear thin slices 1 is coated with one deck plastic cement clad 4, this clad 4 can be eliminated the impact force of gear 3 in the contact moment generation of high speed rotating effectively, reduces gear 3 gearing noises, prolongs the working life of gear 3.Clad 4 can be with materials such as nylon or rubber.

Certainly, the above is the utility model example only, is not to limit the utility model practical range, so, all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.

Claims

1. built up gear, it is characterized in that: it comprises: several pieces gear thin slices (1), identical gear thin slice (1) is superimposed together fully with overlapping, and by the fixing gear (3) that forms of fastening piece (2).

2. built up gear according to claim 1 is characterized in that: described gear thin slice (1) is provided with the positioning hole of installing for fastening piece (2) (12).

3. built up gear according to claim 2 is characterized in that: described gear thin slice (1) is provided with the axis hole of installing for gear shaft (13).

4. built up gear according to claim 3 is characterized in that: the quantity of described positioning hole (12) is more than two.

5. built up gear according to claim 4 is characterized in that: described gear thin slice (1) adopts sheet metal to be stamped to form.

6. built up gear according to claim 5 is characterized in that: described fastening piece (2) is a rivet.

7. built up gear according to claim 5 is characterized in that: described fastening piece (2) is a plastic rod.

8. according to any described built up gear among the claim 1-7, it is characterized in that: the surface of described gear (3) is coated with one deck clad (4).