CN2846902Y - Driving gear for electric tool - Google Patents

Abstract

The utility model discloses a driving gear for an electric tool, which comprises a plastic wheel disc and plastic gear teeth which are arranged on the plastic wheel disc, wherein a shaft hole is arranged on the wheel disc and a metal sheet is fixedly clamped in the wheel disc. Thus, the driving gear for an electric tool has the advantages of simple structure, high rigidity, long service life and safe operation.

Description

Be used for the driving gear on the electric tool

Technical field

The utility model relates to a kind of driving gear, particularly a kind of driving gear that is used on the electric tool.

Background technique

At present, gear be widely used in each equipment of row, and the structure of gear specifically all comprises wheel disc, is arranged at the teeth on the wheel disc, has axis hole on the wheel disc with its diverse in function.

And existing gear mainly is divided into two kinds: a kind ofly be made of metal integral, though its rigidity is big, long service life, but it still exists with shortcoming, 1), because gear is to comprise by wheel disc, teeth, and this gear is to be made of full-metallic, thereby the complex process of its processing, and difficulty is bigger; 2), gear is to be made of metal, its cost is higher.3) gear that forms of metal manufacturing is used in its easy conduction on electrician's the equipment, thus the danger that causes the user to get an electric shock easily.

Another kind be by the plastic cement integral molded plastic form as Chinese patent ZL03225141.6 disclosed a kind of by name " mechanism of skidding between a kind of injection-molded gear "; though its production cost is low; and the technology of processing is easy; but still there is following shortcoming in it; because gear is to be made of plastics; its hardness is not high; and plastics are heated and dissolve easily; poor thermal conductivity, and when gear uses, be in contact with one another friction owing between gear, thus produce heat; because the heat transfer of plastics teeth is slow; thereby teeth gather a large amount of heats, and regular meeting causes the teeth distortion, thereby shorten the working life of gear.

The model utility content

The purpose of this utility model is to solve above-mentioned shortcoming, and provide a kind of simple in structure, rigidity is big, long service life, and the driving gear that is used on the electric tool safe in utilization.

The purpose of this utility model is achieved in that a kind of driving gear that is used on the electric tool, comprises by the plastic cement wheel disc, is arranged at the plastic cement teeth on the wheel disc, has axis hole on the wheel disc, and clamping has a tinsel in the described wheel disc.

Have the through hole that quickens the tinsel heat radiation on the upper and lower end face of described wheel disc.

Have hole clipping on the described tinsel.

The periphery of described tinsel is extended with double wedge, and institute reaches double wedge and is clamped in the teeth.

Described tinsel inner hole wall to the distance of axis hole greater than 0.5MM.

The beneficial effects of the utility model are: 1), since tinsel have fine rigidity, thereby wheel disc in clamping one tinsel is arranged, it is simple in structure, and can strengthen the rigidity of gear greatly, makes not flexible type of gear; 2) and tinsel has good thermal conductivity, so the heat that teeth produce can in time be delivered on the wheel disc, and leaves rapidly by the through hole on the wheel disc, thereby avoided the teeth distortion, prolonged the working life of gear; 3) since the tinsel inner hole wall to the distance of axis hole greater than 0.5MM, played effect, thereby it uses the danger that is difficult for taking place electric shock every electricity, it is safe in utilization.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is both overall schematic of the utility model;

Embodiment

Shown in Fig. 1 to 2: a kind of driving gear that is used on the electric tool, comprise by plastic cement wheel disc 1, be arranged at the plastic cement teeth 2 on the wheel disc 1, have axis hole 3 on the wheel disc, clamping has a tinsel 4 in the described wheel disc 1.Have the through hole 101 that quickens tinsel 4 heat radiations on the upper and lower end face of wheel disc.Have hole clipping 401 on the tinsel 4, and the periphery of tinsel 4 is extended with double wedge 402, institute reaches double wedge 402 and is clamped in the teeth 2.Tinsel 4 inner hole walls 403 arrive the distance of axis hole 3 greater than 0.5MM.

Claims (5)

1. a driving gear that is used on the electric tool comprises by plastic cement wheel disc (1), is arranged at the plastic cement teeth (2) on the wheel disc (1), has axis hole (3) on the wheel disc, it is characterized in that the interior clamping of described wheel disc (1) has a tinsel (4).

2. according to the described driving gear that is used on the electric tool of claim 1, it is characterized in that, have the through hole (101) that quickens tinsel (4) heat radiation on the upper and lower end face of described wheel disc.

3. according to claim 1 or the 2 described driving gears that are used on the electric tool, it is characterized in that, have hole clipping (401) on the described tinsel (4).

4. according to claim 1 or the 2 described driving gears that are used on the electric tool, it is characterized in that the periphery of described tinsel (4) is extended with double wedge (402), institute reaches double wedge (402) and is clamped in the teeth (2).

5. according to claim 1 or the 2 described driving gears that are used on the electric tool, it is characterized in that described tinsel (4) inner hole wall (403) arrives the distance of axis hole (3) greater than 0.5MM.

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