CN200977668Y

CN200977668Y - Planet wheel type cutting device

Info

Publication number: CN200977668Y
Application number: CN 200620125642
Authority: CN
Inventors: 吴立丰; 吴兴旺; 常影; 李进
Original assignee: NANJING PRIDE TECHNOLOGY Co Ltd
Current assignee: NANJING PRIDE TECHNOLOGY Co Ltd
Priority date: 2006-12-04
Filing date: 2006-12-04
Publication date: 2007-11-21
Anticipated expiration: 2016-12-04

Abstract

The utility model relates to a planet gear type cutting device for cutting the plastic material such as beverage suction pipe, which belongs to plastic cement mechanical technique field. The device comprises a rotating fulcrum supported on a machine frame; the rotating fulcrum is fixedly connected with a disc, a dead wheel coaxial with the disc is arranged on the machine frame, at least a gear fulcrum is supported round the circumference of the disc, the planet gear and a tool rest plate are arranged on the gear fulcrum, the planet gear is meshed with the dead wheel, and at least a blade aslope extended in the radial direction is fixed on the tool rest plate. The utility model can guarantee the cut-off quality, decrease the equipment vibration, and reduce the noise at the premise of nearly invariable equipment volume.

Description

The planet gear type shearing device

Technical field

The utility model relates to a kind of plastic cement section bar shearing device, and especially a kind of straw shearing device belongs to the plastic machine technical field.

Background technology

Adopt the flywheel fly-cutter type the shearing device of the small-sized plastic cement section bar of production (as straw) continuously, promptly on the flywheel of rotation, install one or several cutting knife, keep traction rotating speed and the ratio that cuts off rotating speed, cut off the section bar of sending into continuously, to keep the length and the cross section of plastic cement section bar.

Understand according to the applicant, when producing small-sized plastic cement section bar, generally guarantee the length and the cross section of section bar by the ratio of adjusting the traction rotating speed and cutting off rotating speed.When producing long or during section bar that the cross section is bigger, often will reducing the rotating speed of flywheel, certainly will reduce the cut-out linear velocity like this, thereby influence the otch cross section quality, also influence the fluctuation of section bar sectional area sometimes.If tubing then causes the fluctuation of internal diameter.Simultaneously, also be easy to generate bigger noise and vibrations.In the past,, usually adopted the way that increases the flywheel external diameter, and made equipment become heavy for solving above-mentioned quality problems.

The utility model content

The purpose of this utility model is: the shortcoming at above prior art exists, keeping under the almost constant prerequisite of equipment volume, and a kind of shearing device that quality, reduction equipment shake, reduce the planet gear type of noise that can guarantee to cut off is proposed.

In order to reach above purpose, planet gear type shearing device of the present utility model comprises the rotation fulcrum that is supported on the frame, described rotation fulcrum is connected with the disk relative fixed, the fixed gear coaxial with described disk is housed on the described frame, support at least one gear fulcrum near the described disk circumference, described gear fulcrum fixedly is equipped with planetary gear and knife rest dish, and described planetary gear and fixed gear engagement are fixed at least one radially-protruding blade on the described knife rest dish.

Planetary gear, gear fulcrum, knife rest dish and blade join together in fact, constitute planetary wheeling assembly.Usually, the planetary wheeling assembly that blade is housed by bearings on disk.For keeping moving equilibrium, generally there is 2-3 group planetary wheeling assembly to be distributed on the same circumference of disk border, rotate synchronously with disk.The rotating speed of disk can be regulated, and keeps required ratio with the traction rotating speed.Like this, when disk drives the planetary gear rotation, when planetary gear rotates around the fixed gear that is engaged with, also around self center of circle rotation.Blade is installed in the knife rest plate wheel along last, when disk rotates, maximum instantaneous linear velocity on the planetary gear reference circle is 2 times of the planetary gear center of circle, the diameter of knife rest dish is generally greater than the diameter of planetary gear, therefore, when blade when distance pivot distal-most end is worked, blade cuts with the linear velocity more than the several times of the planetary gear center of circle, thereby can keep guaranteeing to cut off quality under the almost constant prerequisite of equipment volume.

In addition, as long as required when the ratio of the number of teeth of fixed gear and the number of teeth of planetary gear is certain value, can be achieved as follows any working condition:

1, adorn a blade on a certain knife rest dish, the realization disk revolves to turn around and cuts off once;

2, uniform many blade on some knife rest dishes, the realization disk revolves to turn around and cuts off once, from moving a blade, has prolonged the time of continuous operation simultaneously.

3, adorn a blade on each group planetary wheeling assembly, the realization disk revolves and turns around, and repeatedly cuts off the method and is applicable to short section bar.

4, adorn a blade at some knife rest dishes, realize the cut-out of disk rotation multi-turn once, the method is applicable to the section bar that cuts off long profiles and larger cross-section.

Description of drawings

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

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the side view of Fig. 1.

The specific embodiment

The planet gear type shearing device of present embodiment as depicted in figs. 1 and 2, rotation fulcrum 1 is supported on the frame, is connected relative fixed with disk 2 by key.Fixedly mounting the fixed gear 3 coaxial on the frame with disk 2.Planetary gear 4, gear fulcrum 5, knife rest dish 6 and blade 7 join together, constitute planetary wheeling assembly.Uniform three groups of planetary wheeling assemblies on the same circumference at disk 2 edges by bearings.Each planetary gear 4 of organizing in the planetary wheeling assembly meshes with fixed gear 3 respectively.Knife rest dish 6 is taken turns along last uniform three the radially-protruding blades 7 of fixing.

During work, the motor that is fixed in the frame rotates by driving-chain driven rotary fulcrum 1, thereby drives disk 2 rotations, and disk 2 drives planetary gear 4 and rotates around fixed gear 3 centers of circle, and planetary gear 4 forces rotation own when rotating around fixed gear 3 centers of circle.Because the maximum instantaneous linear velocity on planetary gear 4 reference circles is 2 times of the planetary gear center of circle, the diameter of knife rest dish 6 is greater than the diameter of planetary gear 4, so blade 7 carries out work with the linear velocity of the planetary gear center of circle more than 2 times.The linear velocity (revolution speed) in planetary gear 4 centers of circle is the linear velocity in disk 2 centers of circle, and maximum linear velocity is two times of its center of circle speed on planetary gear 4 reference circles, if load onto blade 7 and cut off motion this moment on knife rest dish 6 corresponding positions, will produce and cut off effect at a high speed.

Facts have proved that the planet gear type shearing device of present embodiment has rationally utilized the planetary gear principle, has improved the cut-off velocity of blade dexterously, thereby improved the quality of producing small-sized plastic cement section bar, reduced the vibrations of equipment simultaneously, reduced the noise that equipment produces.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1, a kind of planet gear type shearing device, comprise the rotation fulcrum that is supported on the frame, described rotation fulcrum is connected with the disk relative fixed, it is characterized in that: the fixed gear coaxial with described disk is housed on the described frame, support at least one gear fulcrum near the described disk circumference, planetary gear and knife rest dish fixedly are housed on the described gear fulcrum, and described planetary gear and fixed gear engagement are fixed at least one radially-protruding blade on the described knife rest dish.

2, according to the described planet gear type shearing device of claim 1, it is characterized in that: described planetary gear, gear fulcrum, knife rest dish and blade join together, constitute planetary wheeling assembly, described planetary wheeling assembly by bearings on disk.

3, according to the described planet gear type shearing device of claim 2, it is characterized in that: described planetary wheeling assembly has more than two groups, is distributed on the same circumference of disk border.

4, according to the described planet gear type shearing device of claim 2, it is characterized in that: uniform 2-3 group is by the planetary wheeling assembly of bearings on the same circumference of described disk border, and described knife rest plate wheel is along the last uniform blade that at least one handle stretches out radial skew of fixing.