CN2080424U - Document breaker with combined cutter - Google Patents

Abstract

The utility model discloses a document disintegrator which is used for destroying classified documents. The utility model is provided with a special power device, a speed reducing device, an equal speed device and cutting devices A and B, wherein, paper can be cut into strip-shaped scraps by the cutting device A which comprises a miniature blade with a toothed disk and a spacing sheet; the strip-shaped scraps can be cut into powder-shaped scraps by the cutting device B; the scraps which are 2.5-8 mm+ [2] can not be pieced together and can not be read. The core of the utility model is to optimize the angles of cutters and the configuration of the two cutting devices. The utility model has the advantages of reasonable design, artful structure, easy realization of material selection and processing technology, low cost, easy maintenance, assemblage and debugging and has extremely important meaning for security work.

Description

Document breaker with combined cutter

The utility model belongs to the modern handle official bussiness field of mechanical technique.

Novel office machinery file crushing machine has been widely used in office's security work category, and its function is that readable file is ground into paper scrap, makes it to piece together can't distinguish again and read content.

The utility model is on the basis of present inventor's pulverizer series of products, is optimized design and improvement once more, becomes the secret shredded paper machinery of a kind of novel height.The core of invention is the optimal design of cutter structure.

Mechanical part of the present invention (shown in figure one), that is: motor → deceleration and constant speed unit (figure one 1) → cutting system comprise topping machanism A(figure one 2) with B(figure one 3).

The function of file crushing machine topping machanism A is: 16 file papers of opening (60 gram blank sheet of paper or newspaper) are cut into the wide strip bits of 0.5～3.5mm.The function of topping machanism B is that the strip bits are cut into broken powder, and its effect is 2～8mm ²Bits.Reach high secret effect.

Characteristics of the present invention are:

The design of cutter one, 2 of topping machanism A(figure one) and partition (shown in figure two):

1, be with miniature tooth (figure two 1) to be distributed on the circumference of cutter, the first kind non-uniform Distribution, its tooth pitch is 0.5～5mm, anterior angle α=-5 °～+ 15 °, relief angle γ=0 °～45 °, the angle is 0 before and after the side.(2 thick 0.5～3.3mm of figure two, overlap is loaded on the two parallel cutter shafts (figure two 3) blade.The method of second kind of employing straight knurling is made the miniature tooth of blade.

2, partition (figure two 4): two kinds of partitions for different, place between each blade, be through on the cutter shaft, be strip bits guiding with it, make its flow to topping machanism B(figure one 3).

The width of strip cutting is decided by the thickness of blade and partition.Blade and partition are contained on the cutter shaft, require axially to leave 0.95～2.3mm/100mm gap, and purpose is that topping machanism is gone slick, and alleviate impact load, and guarantee that cutting is unimpeded.

Two, topping machanism B(is shown in figure three) design:

1, the roller cutter (as figure three 1): 6～10 teeth that evenly distribute on the circumference, helical form β=5 °～30 °, cutter tooth anterior angle α=5 °～45 °, relief angle γ=0 °～10 °.

2, revolving knife (figure three 2): anterior angle α=0 °～5 °, relief angle γ=0 °～5 °, horizontal cutter linearity allowable tolerance 0.02～0.08mm.

The relative position requirement is two cutter tooth gaps, 0.01～0.06mm when roller cutter and revolving knife assembling, and is good to guarantee cutting ability.

Three, overall structure

Structural design of the present invention adopts a motor, by slowing down and isokinetic device, drives two groups of topping machanism A and B and cuts simultaneously.Should guarantee that paper feeding speed is moderate, guarantee that again two groups of cutter speed of related movements distribute rationally, in running, be become the powder bits by crosscut to guarantee the strip paper scrap.

Topping machanism A and B are loaded on the special stand (as shown in Figure 4).It has guaranteed the relative position of topping machanism A and B, makes to be opened by cut paper that to be cut into the operation of powder bits from whole Zhang Zhizhi unobstructed good with cutting ability.

The used part selection of the present invention is reasonable, and processing technology easily realizes, easily guarantees assembly precision, is convenient to debugging and maintenance, and cutter life is long, and cutting is reliable.Work has very important meaning for secrecy technology in the present invention.

Claims (3)

1, a kind of file crushing machine comprises (1) motor, (2) deceleration device, (3) constant speed transmission device, (4) topping machanism A, B, it is characterized in that the A device adopts miniature tooth disc-shaped cutting tool, the cutting system device that the B device adopts roller cutter, revolving knife to form.

2, file crushing machine according to claim 1 is characterized in that miniature tooth disc-shaped cutting tool angle is: first kind: anterior angle α=-5 °～15 °, relief angle γ=0 °～45 °, tooth pitch 0.5～5mm, blade thickness 0.5～3.5mm.Second kind is blade circumference straight knurling.

3, file crushing machine according to claim 1 is characterized in that roller cutter cutter tooth is a helical form, cutter tooth anterior angle α=0 °～45 °, relief angle γ=0 °～10 °; Revolving knife anterior angle α=0 °～5 °, relief angle γ=0 °～5 °; Revolving knife linearity allowable tolerance is 0.02～0.08mm, and backlash the best of roller cutter and revolving knife is 0.01～0.06mm.

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