CN214288650U - Knife bar opening prevention mechanism of paper shredder - Google Patents

Abstract

A shredder knife bar spreading prevention mechanism comprising: fixed mounting is at the balance plate between gear seat and tailstock and the cover is put and is led the scraps of paper on the sword stick, its characterized in that: the balance plate is a v-shaped 21274; the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate; an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole; the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate. The stress strength of the paper guide sheet is increased by utilizing the contact between the inner groove surface of the v-21274shaped balance plate and the three peripheries of the paper guide sheet. The paper scraps which reversely rotate and exit are downwards dropped off from the cutter wheel by utilizing the arc-shaped ring cover arranged on the side surface of the paper guide sheet, and the paper blocking of a cutter rod caused by the fact that the paper enters the space between the balance plate and the paper guide sheet is eliminated.

Description

Knife bar opening prevention mechanism of paper shredder

Technical Field

The utility model relates to a kneader, especially a kneader prevents that sword stick struts mechanism.

Background

The paper shredder completes the paper shredding function through the rotation of two parallel cutter bars which are meshed with each other. The clearance between the two knife bars is set according to the design requirement, when the paper shredder is subjected to excessive paper or paper withdrawing operation, the two parallel knife bars are propped open, and the normal operation of the paper shredder is influenced. In order to prevent the knife bars from being spread, the conventional paper shredder is generally provided with a flat balance plate 01 at both sides of the two parallel knife bars, and the two knife bars are prevented from being spread by the contact fit (shown in fig. 4) of the balance plate 01 and the outer side edge of the paper guide 02 on the knife bars. However, in practical use, it is found that since the paper guide sheet has a single structure and weak strength, and one side of the paper guide sheet is in contact with the balance plates, the stress surface is small, when the paper shredder shreds, the parallel knife bars are guided by the paper and apply too much force to the balance plates at the two sides, the paper guide sheet is easy to be spread, and the effect of preventing the knife bars from being spread cannot be really achieved. When the knife bar is blocked and needs to withdraw paper, the knife wheel rotating in the reverse direction can bring the withdrawn paper scraps into a gap between the balance plate and the paper guide plate along the knife point of the knife wheel (as shown in figure 5), so that the knife bar is jammed in the paper, and the normal operation of the paper shredder is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that compensate above-mentioned prior art's defect, provide a kneader prevents that the sword stick struts mechanism.

The technical problem of the utility model is solved through following technical scheme.

This kind of kneader prevents that sword stick struts mechanism includes: a balance plate fixedly arranged between the gear seat and the tail seat and a paper guide sheet sleeved on the knife rod.

The knife bar opening preventing mechanism of the paper shredder is characterized in that:

the balance plate is a v-shaped 21274;

the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate;

an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole;

the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate.

The technical problem of the utility model is further solved through following technical scheme.

And an arc-shaped ring cover for wrapping the knife flywheel is arranged on one side face or two side faces of the paper guide sheet around the semicircular hole.

The design principle of the utility model is that the paper shredder knife bar opening preventing mechanism utilizes the shape balancing plate inner groove surface and the laminating contact of the three peripheries of the paper guiding sheet, so that the stress intensity of the paper guiding sheet is increased. Utilize the arc ring cover that sets up to lead the scraps of paper side to enclose the cover with position break bar, when the shredded paper was moved back by the card, the reverse rotatory break bar will block the wastepaper and withdraw from between two sword sticks, the wastepaper that withdraws from is when contacting the arc ring cover of leading scraps of paper, the wastepaper drops downwards from the break bar, can not get into the clearance of balance plate and leading scraps of paper in the same direction as reverse rotatory break bar, the stick of paper jam that has leaded to between the scraps of paper has been eliminated to the paper entering balance plate and has been led.

Compared with the prior art, the utility model beneficial effect be: 1. strengthening 21274, preventing the knife from spreading; 2. the arc-shaped ring cover of the paper guide sheet effectively prevents the knife bar from being plugged with paper; 3. the cooperation of the 21274and the paper guide plate greatly enhances the anti-spreading strength of the knife bar, so the radial sizes of the knife shaft and the knife blade of the knife bar can be correspondingly reduced, the materials of the knife shaft and the knife blade can be saved, the size of the machine core can be reduced, and the space can be saved.

Drawings

FIG. 1 is an exploded view of the knife bar opening preventing mechanism of the paper shredder;

FIG. 2 is a schematic view of the assembly structure of the knife bar spreading prevention mechanism of the shredder shown in FIG. 1 between the gear seat and the tailstock;

FIG. 3 is a schematic view of the paper orientation of a shredder with the anti-knife bar spreading mechanism of the shredder of FIG. 1 installed during paper ejection;

FIG. 4 is a schematic view of a balance plate and a paper guide of a conventional shredder;

FIG. 5 is a schematic diagram of the paper orientation of a conventional shredder during paper ejection.

Detailed Description

The present invention will be described with reference to the accompanying drawings in conjunction with the following embodiments.

Example (b): as can be clearly seen from fig. 1, the utility model discloses a shredder knife bar opening prevention mechanism, include: a gamma-shaped balancing plate 1 and a paper guide sheet 2.

The v-shaped balancing plate 1 is internally provided with a first surface 11, a second surface 12 and a third surface 13 which are contacted with the periphery of the paper guide sheet 2, the v-shaped balancing plate 1 is internally provided with a screw hole 14 which is used for fixedly mounting the v-shaped balancing plate between the gear seat and the tailstock at two ends.

The shape of the paper guide sheet 2 comprises a first periphery 21, a second periphery 22, a third periphery 23 and a third 21274, the first surface 11, the second surface 12 and the third surface 13 of an inner frame of the shape balance plate 1 are matched, the paper guide sheet 2 is provided with a semicircular hole 24 for a cutter shaft to penetrate and a circular hole 25 for a fixing rod to penetrate, and the two side surfaces of the paper guide sheet 2 are provided with arc-shaped ring covers 26 which can partially cover a cutter wheel 31 of the cutter bar 3 around the semicircular hole 24.

The utility model discloses a kneader prevents that sword stick struts mechanism is installed on kneader as shown in fig. 2, the corresponding hole of the shape balance plate 1 both ends insert gear seat 4 and tailstock (not shown in the figure) in, twist into with the screw in the screw hole 14 of shape balance plate 1 is fixed. The paper guide plate 2 is inserted through the semicircular hole 24 on the main shaft between the knife wheels 31 of the knife bar 3, the circular hole 25 of the paper guide plate 2 is inserted through the fixing rod 41 to be fixed, and the arc-shaped annular cover 26 of the paper guide plate 2 arranged between the knife wheels 31 of the knife bar 3 covers the knife wheels 31.

The v-21274h-shaped balance plate 1 covers the knife bar 3 and is vertical to the v-21274h-shaped balance plate 1, and three peripheries of the paper guide sheet 2 on the inner groove surface of the v-shaped balance plate 1 are in contact with the peripheral surface of the inner groove in a fitting manner, namely: the utility model discloses a three 21274, the first face 11 of shape balance plate 1, second face 12, third face 13 contact with first face 21 of paper guide piece 2 respectively, second face 22, third face 23, increased paper guide piece 2 and three 21274, the contact stress face of shape balance plate 1 makes the sword stick 3 atress support more firm.

As clearly shown in FIG. 3, when the paper shredder is jammed, the knife bar is operated to rotate in the reverse direction, the paper scraps discharged from the knife wheel are blocked when contacting the arc-shaped ring cover 26 of the paper guide 12, the paper scraps are separated from the knife wheel 31 and are not guided into the v-21274along the knife wheel rotating in the reverse direction, and the knife bar is effectively prevented from jamming the paper during shredding.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, numerous equivalent substitutions or obvious variations may be made without departing from the spirit of the invention, and the same properties or uses are deemed to fall within the scope of the invention as defined by the claims appended hereto.

Claims (2)

1. A shredder knife bar spreading prevention mechanism comprising: fixed mounting is at the balance plate between gear seat and tailstock and the cover is put and is led the scraps of paper on the sword stick, its characterized in that:

the balance plate is a v-shaped 21274;

the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate;

an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole;

the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate.

2. The shredder anti-knife bar spreading mechanism according to claim 1, characterized in that:

and an arc-shaped ring cover for wrapping the knife flywheel is arranged on one side face or two side faces of the paper guide sheet around the semicircular hole.

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