CN101829899A

CN101829899A - Alignment mechanism for automatically assembling blade of paper shredder

Info

Publication number: CN101829899A
Application number: CN 201010182737
Authority: CN
Inventors: 林颖; 庄剑毅; 余熳烨
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2010-05-19
Filing date: 2010-05-19
Publication date: 2010-09-15
Anticipated expiration: 2030-05-19
Also published as: CN101829899B

Abstract

The invention discloses an alignment mechanism for automatically assembling a blade of a paper shredder. The alignment mechanism comprises a bracket, a cylinder, a DC motor, a micro speed reducer, a safety device, a rotating spindle, a sensor, a signal plate and an elastic wheel. The bottom of the bracket is connected with a base through a hinge; a middle lug of the bracket is connected with a cylinder connecting rod; the DC motor, the micro speed reducer, the safety device, and the rotating spindle are connected in turn; the micro speed reducer is fixed on a middle supporting plate of the bracket; the signal plate and the elastic wheel are fixed on the rotating spindle; the elastic wheel is arranged above the signal plate; and the sensor is arranged on an end cover of the bracket. The alignment mechanism can realize automatic and accurate positioning of the blade by only using a small DC motor, a small cylinder and a sensor, and has the advantages of simple mechanism and convenient control.

Description

Kneader bar is the alignment mechanism of assembling automatically

Technical field

The present invention relates to mechanical device, specifically is the kneader bar alignment mechanism of assembling automatically.

Background technology

Assembling is an important step of manufacture course of products, realizes that assembly automation is for enhancing productivity, reduce cost, guarantee that product quality is significant.Shredder is as a kind of important modern handle official bussiness instrument, and the quantity of its core part blade is many, and the assembling amount is big.Domestic at present, manual mode is all adopted in the assembling of kneader bar, promptly aim at knife bar cutter groove by manually making to buckle in the kneader bar, low, the poor stability of this manual mode efficient, also do not occur relevant automatic mounting technique and equipment at present, one of its reason is the relevant issues of convenience, cost and the technical complexity of blade location in the time of can not solving assembling well.Match ratio between kneader bar and the knife bar is tightr, realize that the correct location technology difficulty of blade is big by a mechanism or controllable equipment.

Summary of the invention

The objective of the invention is to defective, a kind of kneader bar alignment mechanism of assembling automatically is provided, only just can realize correctly locating automatically of blade with a DC motor, a cylinder and a sensor at the prior art existence.Mechanism of the present invention is simple, and is cheap for manufacturing cost, and the technical sophistication degree is low, and control is convenient, and concrete technical scheme is as follows.

A kind of kneader bar is the alignment mechanism of assembling automatically, comprises support, cylinder, DC motor, miniature reducer, safety, rotary main shaft, sensor, signal patch and elastic wheel; The bottom of support is connected with base by hinge, and the middle part lug of support is connected with the cylinder extension bar; DC motor, miniature reducer, safety and rotary main shaft are connected successively, and miniature reducer is fixed on the middle part gripper shoe of support; Signal patch and elastic wheel are fixed on the rotary main shaft, and elastic wheel is above signal patch, and sensor is installed on the end cap of support.

Above-mentioned kneader bar is the alignment mechanism of assembling automatically, and described cylinder adopts back hinge support mounting means, and cylinder saddle is fixed in base; Support is done the swing on the vertical direction under air cylinder driven.

Above-mentioned kneader bar is the alignment mechanism of assembling automatically, and described safety comprises safety side's handle, safety overcoat and safety adjustment screw, and safety side's handle is connected with rotary main shaft with miniature reducer respectively with the safety overcoat; When the moment of resistance of the rotary main shaft slipping torque less than safety, safety side's handle and safety overcoat rotate synchronously; When the moment of resistance of the rotary main shaft slipping torque greater than safety, safety skids, and the safety overcoat stops operating; The slipping torque of safety is adjusted by the safety adjustment screw.

Above-mentioned kneader bar is the alignment mechanism of assembling automatically, is uniform-distribution with a plurality of apertures on the signal patch, and by aperture, the sensor that is installed on the end cap of support produces two kinds of different signals, corresponds respectively to the rotation of signal patch and stops.

Above-mentioned kneader bar is the alignment mechanism of assembling automatically, and the gabarit of elastic wheel is shaped as circle, trapezoidal, triangle or waveform.

Operation principle of the present invention: when starting working, the blade of shredder arrives the precalculated position, and motor begins to rotate, and drives the handle rotation of safety side, and the control device control cylinder promotes support, allow elastic wheel be close on the blade side, and blade has a lateral pressure; When blade does not arrive the tram, the frictional force between blade and the knife bar is less, and blade is less to the moment of resistance of elastic wheel, slipping torque less than safety, the overcoat of safety and square handle rotate synchronously, drive the elastic wheel rotation, stir blade and rotate around fixing knife bar; When blade arrival tram, the interior of blade buckled in the cutter groove that snaps onto knife bar, is subjected to a bigger clamping force, blade is bigger to the moment of resistance of elastic wheel, and greater than the slipping torque of safety, safety skids, rotary main shaft and signal patch stop operating, and finish the correct location of blade; Sensor produces different signal notice control device, control device control cylinder retraction, and elastic wheel leaves blade, prepares to carry out the centering of next blade; The slipping torque of safety can be adjusted by its adjustment screw as required.

The present invention compared with prior art has following advantage: the present invention only uses a DC motor (can adopt existing DC fractional motor), a cylinder (can adopt existing small-sized cylinder) and a sensor just can realize that the correct automatically location elastic wheel of blade adopts yielding resilient material (as rubber) manufacturing, can stir blade, and blade there is a pressure; The correct location of blade guarantees that by stirring with skidding of safety of elastic wheel reliable operation designs ingenious; Be uniform-distribution with a plurality of apertures on the signal patch, whether the rotation of sensor detection signal sheet, produces two kinds of different signals, and the notice control device is controlled, and control is convenient; The position centering full automation of blade; The overall structure of mechanism is simple, and compact in design is cheap for manufacturing cost.

Description of drawings

Fig. 1 is the schematic diagram of the alignment mechanism that kneader bar assembles automatically in the embodiment;

Fig. 2 is the kneader bar application example schematic diagram of the alignment mechanism of assembling automatically;

Fig. 3 is one of fundamental diagram of the automatic alignment mechanism that assembles of kneader bar;

Fig. 4 be kneader bar automatically the alignment mechanism of assembling fundamental diagram two.

Among the figure, 1-cylinder, 2-cylinder extension bar, 3-support lug (in the centre of cylinder extension bar), 4-sensor, the 5-end cap, 6-signal patch, 7-elastic wheel, 8-rotary main shaft, 9-bearing (under end cap, being blocked), 10-safety overcoat, 11-safety adjustment screw, 12-safety side handle, 13-gripper shoe, 14-miniature reducer, 15-DC motor, the 16-support, 17-base, 18-cylinder saddle, 19-cutter groove, buckle the movable holder fork of 22-, 23-knife bar in the 20-blade, 21-blade.

The specific embodiment

Below in conjunction with accompanying drawing concrete enforcement of the present invention is described further, but enforcement of the present invention and protection domain are not limited thereto.

Referring to the alignment mechanism that kneader bar shown in Figure 1 assembles automatically, support 16 bottoms are connected with base 17 by hinge, and except hinge rotation in the radial direction, support 16 other 5 frees degree are all limited by hinge; Support 16 middle part lugs 3 are connected with cylinder extension bar 2 hinges, and cylinder saddle 18 is fixed in base, so during cylinder 1 action, driving arm 16 is done corresponding swing, and don't can shake; Miniature reducer 14 and DC motor 15 as an overall fixed on bracket leg fagging 13; Rotary main shaft 8 is inserted in the bearing 9 that is fixed on the support 16, can only axially rotate, and signal patch 6 and elastic wheel 7 are fixed on the rotary main shaft 8, rotate with the rotation of rotary main shaft 8; Connect by safety between rotary main shaft 8 and the miniature reducer, so when 15 rotations of DC motor, will drive elastic wheel and rotate; Sensor 4 is installed on the end cap 5, detects the rotation status of main shaft by signal patch.Be uniform-distribution with a plurality of apertures on the signal patch 6, by aperture, the sensor that is installed on the end cap of support produces two kinds of different signals, corresponds respectively to the rotation of signal patch and stops.

Referring to shown in Figure 2, when centering work begins, the blade 20 of shredder and movable holder fork 22 arrive the precalculated position, DC motor 15 begins to rotate, drive 12 rotations of safety side's handle, control device control cylinder 1 stretches out cylinder extension bar 2, promotes support 16 to knife bar 23 swings, allow elastic wheel 7 be close on the side of blade 20, and blade 20 have a lateral pressure.

Referring to Fig. 3 and shown in Figure 4, during work, the elastic wheel 7 that is fixed on the main shaft contacts with blade 20, and blade 20 applies lateral pressure F _N, elastic wheel 7 is with angular velocity omega _InitiativelyThe rotation, blade under driving force Fs effect with angular velocity omega _PassiveRotation.Working as blade 20 no show tram still, frictional force between blade 20 and the knife bar 23 is less, the moment of resistance of 20 pairs of elastic wheels 7 of blade is less, slipping torque less than safety, safety overcoat 10 rotates synchronously with safety side's handle 12, drive elastic wheel 7 rotations, stir blade 20 and rotate around fixing knife bar 23; When blade 20 arrives the tram, buckle 21 in the blade and snap onto in the cutter groove 19, be subjected to a bigger clamping force, the moment of resistance of 20 pairs of elastic wheels 7 of blade sharply increases, and greater than the slipping torque of safety, safety skids, and rotary main shaft 8 and signal patch 6 stop operating; Sensor 4 produces different signal notice control device, control device control cylinder extension bar 2 retractions, and elastic wheel 7 leaves blade 20, prepares to carry out the centering of next blade; Whole process full automation is finished in blade 20 correct location.

Claims

1. the alignment mechanism that kneader bar assembles automatically is characterized in that comprising support, cylinder, DC motor, miniature reducer, safety, rotary main shaft, sensor, signal patch and elastic wheel; The bottom of support is connected with base by hinge, and the middle part lug of support is connected with the cylinder extension bar; DC motor, miniature reducer, safety and rotary main shaft are connected successively, and miniature reducer is fixed on the middle part gripper shoe of support; Signal patch and elastic wheel are fixed on the rotary main shaft, and elastic wheel is above signal patch, and sensor is installed on the end cap of support.

2. kneader bar according to claim 1 is the alignment mechanism of assembling automatically, it is characterized in that described cylinder adopts back hinge support mounting means, and cylinder saddle is fixed in base; Support is done the swing on the vertical direction under air cylinder driven.

3. kneader bar according to claim 1 is the alignment mechanism of assembling automatically, it is characterized in that described safety comprises safety side's handle, safety overcoat and safety adjustment screw, safety side's handle is connected with rotary main shaft with miniature reducer respectively with the safety overcoat; When the moment of resistance of the rotary main shaft slipping torque less than safety, safety side's handle and safety overcoat rotate synchronously; When the moment of resistance of the rotary main shaft slipping torque greater than safety, safety skids, and the safety overcoat stops operating; The slipping torque of safety is adjusted by the safety adjustment screw.

4. kneader bar according to claim 1 is the alignment mechanism of assembling automatically, it is characterized in that being uniform-distribution with on the signal patch a plurality of apertures.

5. according to the automatic alignment mechanism of assembling of each described kneader bar of claim 1～4, the gabarit that it is characterized in that elastic wheel is shaped as circle, trapezoidal, triangle or waveform.