CN202022604U - Half-toothed gear - Google Patents

Abstract

The utility model discloses a half-toothed gear, which comprises a cylinder, wherein a through hole is formed on the cylinder; teeth are formed on half of the outer periphery of the cylinder, and the other half of the outer periphery of the cylinder is smooth; and pin holes are formed on the smooth outer periphery of the cylinder and communicated with the through hole. The teeth are formed on the half of the periphery of the half-toothed gear, so that a transmission shaft can be fixed to any angular position within the range of 0 to 180 degrees; and the rotating position of an eccentric wheel can be adjusted by the use of the effect of the transmission shaft, so as to adjust the clamping force of two rollers.

Description

A kind of half gear

Technical field:

The utility model relates to laminator progression field, relates to half gear of the tensioning feedway that uses on a kind of laminator in particular.

Background technology:

Laminator is in work, film need be attached to mobile phone, on the electronic product shell such as MP3, this time, used film all was a rolling, carry up worker's laminator to use film by conveying mechanism, feedway comprises a casing, two rotating cylinders that are installed in the casing, one is drive roll in two cylinders, be used for being connected with engine installation, power is provided, another is driven cylinder, rotation by the drive roll band, driven cylinder is hinged on the support, and support is fixed on the rotary axle, make driven cylinder to rotate around axle, be film to be placed in the middle of two cylinders when carrying, utilizing two cylinders that film is clamped back roll rotates, the drive film moves forward, and the size of the power of two cylinder clamping films is to need to adjust, gripping power is excessive, film can be pressed from both sides badly, and gripping power is following excessively, then cannot carry out the conveying of film, fixing device is all arranged on feedway, generally all is a transmission shaft, has two eccentric wheel above, utilize eccentric center principle to realize extruding to flower wheel, provide gripping power, but fixing device is when providing tensile force like this, stable inadequately, can become flexible along with reasons such as vibration produce, make the tensile force that acts on the driven cylinder change.

The utility model content:

The purpose of this utility model provides a kind of half gear, and it makes the tightening device of laminator simple, fast speed is adjusted tensile force and can in use kept position, the not phenomenon that can become flexible again.

Technology solution of the present utility model is as follows:

A kind of half gear comprises a cylinder, and described cylinder has a through hole; On the described cylindrical outer circumference surface teeth are arranged.

Described a kind of half gear, half of described cylinder outer circumference surface has teeth, and second half is the light face.

Described a kind of half gear, the light face of described cylinder outer circumference surface is provided with pin-and-hole, and described pin-and-hole and described through hole communicate.

Described a kind of half gear, described pin-and-hole is two.

Described a kind of half gear, there is chamfering at described through hole both ends.

The utility model beneficial effect is:

Half is arranged on the utility model half circumference of gear is the dentation that teeth are arranged, make transmission shaft can be fixed on the interior any angular position of 180 degree scopes, utilize this effect of transmission shaft, come the position of rotation of adjusting eccentric, thereby reach the effect of the gripping power of regulating two rollers.

Description of drawings:

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

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

Fig. 2 is a birds-eye view of the present utility model;

Fig. 3 is a schematic perspective view of the present utility model.

The specific embodiment:

The following stated is preferred embodiment of the present utility model only, is not that scope of the present utility model is limited.

Embodiment sees accompanying drawing 1～3; A kind of half gear comprises a cylinder 1, and described cylinder has a through hole 101; On the described cylindrical outer circumference surface teeth 102 are arranged.

Half of described cylinder outer circumference surface has teeth, and second half is a light face 103.

The light face of described cylinder outer circumference surface is provided with pin-and-hole 104, and described pin-and-hole and described through hole communicate.

Described pin-and-hole is two.

There is chamfering 105,106 at described through hole both ends.

Claims (5)

1. one and half gears comprise a cylinder, and described cylinder has a through hole; It is characterized in that: on the described cylindrical outer circumference surface teeth are arranged.

2. a kind of half gear according to claim 1, it is characterized in that: half of described cylinder outer circumference surface has teeth, and second half is the light face.

3. a kind of half gear according to claim 2 is characterized in that: the light face of described cylinder outer circumference surface is provided with pin-and-hole, and described pin-and-hole and described through hole communicate.

4. a kind of half gear according to claim 3 is characterized in that: described pin-and-hole is two.

5. a kind of half gear according to claim 4 is characterized in that: there is chamfering at described through hole both ends.

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