CN201534105U

CN201534105U - Paper shredder

Info

Publication number: CN201534105U
Application number: CN2009200595632U
Authority: CN
Inventors: 陆学中
Original assignee: Dongguan Jingrui Electric Appliance Hardware Co Ltd
Current assignee: Dongguan Jingrui Electric Appliance Hardware Co Ltd
Priority date: 2009-07-01
Filing date: 2009-07-01
Publication date: 2010-07-28
Anticipated expiration: 2019-07-01

Abstract

The utility model discloses a paper shredder comprising a cutter shaft and cutter blades. The cutter blades are arranged on the cutter blade at certain intervals, the cutter shaft between two adjacent cutter blades has a bump, and the cutter blades are clamped and fixed among the bumps. The utility model has the advantages of strong integral structure property, high precision, high yield and the like, and facilitates to save the production cost and the material cost.

Description

A kind of paper shredding cutters

Technical field

The utility model relates to a kind of cutter that is used for shredder.

Background technology

Traditional cutter for paper grinder and processing technology thereof are divided into following three classes usually:

1, space collar fixed form: as Fig. 1 (a) to shown in Fig. 1 (c), this cutter is made up of cutter shaft 11, blade 12, jump ring 13 and space collar 14, wherein, blade 12 is fixed on the cutter shaft 11 by adjacent space collar 14, and is fixing at the least significant end employing jump ring 13 of cutter shaft 11.The advantage of this cutter processing is: technology is simple, and is easy to operate.But its shortcoming is: (1) has increased the cost of whole cutter because of increasing space collar; (2) because space collar and blade mutual superposition, and space collar and blade all have thickness deviation, tiny tolerance stack to the end, the situation that may cause jump ring not assemble, thus increased the difficulty of assembling; (3) space collar can only bear the power of certain limit, and is cracked easily.

2, ball expansion hollow pipe mode: as Fig. 2 (a) to shown in Fig. 2 (c), this cutter is made up of cutter shaft 21, blade 22, wherein, cutter shaft 21 is a hollow steel pipe, in process, adopt ball 23 (steel ball) in cutter shaft 21, to roll across, because the diameter of ball 23 is more bigger than the internal diameter of cutter shaft 21, cutter shaft 21 is expanded, thus fixed-type with blade 22.The advantage of this cutter processing is: saves cost, reduced space collar, and easy to operate.But its shortcoming is: (1) can't bear very strong blade torsion (comparing polyhedral solid cutter shaft) because cutter shaft is a tubular structure; (2) because cutter shaft is a tubular structure, the pressure that can bear does not have the holding capacity of solid cutter shaft strong yet, and in the cutter shaft operation process, in case bear bigger pressure, cutter shaft deforms easily, only is applicable to a small amount of shredded paper.

3, whole processing mode: adopt the bar of entity, be processed into all-in-one-piece one cutter by turning, the advantage of this cutter processing is: overall structure has reliable intensity.But its shortcoming is: (1) processing turning process requires very high, and cutting output is big, and production capacity is low; (2) batch process needs large quantities of machining equipments, and the acceptance rate of product is low, and recoverability is little.

Summary of the invention

Based on the defective that exists in the prior art, the purpose of this utility model is to provide a kind of improved paper shredding cutters, utilizes in the roll mode of extruding of the surface of cutter shaft rotation, make material in extruding place to two side flow, thereby blade and cutter shaft is fixed-type.

The technical scheme that the utility model adopted: a kind of paper shredding cutters, comprise cutter shaft and blade, described blade is installed on the cutter shaft with certain being spaced, and has described projection on the cutter shaft between the adjacent knife blades, and described blade is clamped and fastened between the described projection.

Described projection on the above-mentioned cutter shaft forms by rolling tool roll extrusion or extruding.Described rolling tool comprises hob head, hobboing cutter, pad and jump ring, and wherein hobboing cutter is installed on the hob head for being spaced with pad, and two ends are fixed by jump ring.Spacing on the described hob head between the adjacent hobboing cutter is more than or equal to the blade thickness of cutter to be processed.

Above-mentioned cutter shaft is solid polyhedron or the surperficial cylinder cutter shaft that has groove.

The utlity model has following advantage: (1) overall structure is strong, the cutter of similar whole machine-shaping; (2) need not to use space collar to fix blade, improved the precision of assembling, avoid the cumulative limit in the assembling process; (3) no turning amount, the production capacity height is saved processing cost and material cost.

Description of drawings

Fig. 1 (a) is the cutter processing technology figure of traditional space collar fixed form to Fig. 1 (c);

Fig. 2 (a) is the cutter processing technology figure of traditional ball expansion hollow pipe mode to Fig. 2 (c);

Fig. 3 (a) is the mounting structure schematic diagram of rolling tool described in the utility model to Fig. 3 (c);

Fig. 4 (a) to Fig. 4 (c) be cutter processing technology figure described in the utility model and structural representation.

The specific embodiment

Below in conjunction with accompanying drawing concrete structure of the present utility model is further described.

As Fig. 3 (a) to shown in Fig. 3 (c), employed machining tool in the process for paper shredding cutters described in the utility model---hobboing cutter cutter, it comprises hob head 31, hobboing cutter 32, pad 33 and jump ring 34, wherein, hobboing cutter 32 is installed on the hob head 31 for being spaced with pad 33, and the least significant end of hobboing cutter 32 is fixing with hob head 31 by jump ring 34.

To shown in Fig. 4 (c), the processing method of paper shredding cutters described in the utility model may further comprise the steps as Fig. 4 (a):

(1) blade 2 is assembled on the cutter shaft to be processed 1, and adopts anchor clamps (among the figure for drawing) to fix;

(2) adopt the hobboing cutter 32 of rolling tool to carry out roll extrusion or extruding, make the cutter shaft 1 between the adjacent knife blades 2 form 4, two described protruding 4 middle grooves 3 that form of projection to the position of pressing close to blade 2 along the cutter shaft to be processed 1 between the direction A blade 2;

(3) withdraw from rolling tool, utilize described protruding 4 of blade 2 both sides that blade 2 is clamped and fastened on the cutter shaft 1.

In order to guarantee carrying out smoothly of process, the spacing on the described hob head 31 between the adjacent hobboing cutter 32 is more than or equal to the thickness of the blade 2 of cutter to be processed.

Shown in Fig. 4 (c), the paper shredding cutters of machine-shaping comprises cutter shaft 1 and blade 2, described blade 2 is installed on the cutter shaft 1 with certain being spaced, have groove 3 on the cutter shaft 1 between the adjacent knife blades 2, the both sides of blade 2 have projection 4, and described blade 2 is clamped and fastened between described protruding 4.

Described cutter shaft 1 can adopt solid polyhedron or the surperficial cylinder cutter shaft that has groove, to strengthen the holding capacity of cutter shaft blade torsion and pressure.

[0024]

Claims

1. a paper shredding cutters is characterized in that, comprises cutter shaft and blade, and described blade is installed on the cutter shaft with certain being spaced, and has projection on the cutter shaft between the adjacent knife blades, and described blade is clamped and fastened between the described projection.

2. paper shredding cutters according to claim 1 is characterized in that, the projection on the described cutter shaft forms by rolling tool roll extrusion or extruding.

3. paper shredding cutters according to claim 2 is characterized in that described rolling tool comprises hob head, hobboing cutter, pad and jump ring, and wherein hobboing cutter is installed on the hob head for being spaced with pad, and two ends are fixed by jump ring.

4. paper shredding cutters according to claim 3 is characterized in that the spacing on the described hob head between the adjacent hobboing cutter is more than or equal to the blade thickness of cutter to be processed.

5. paper shredding cutters according to claim 1 is characterized in that, described cutter shaft is solid polyhedron or the surperficial cylinder cutter shaft that has groove.