CN201567095U

CN201567095U - Medium separation device

Info

Publication number: CN201567095U
Application number: CN2009202366214U
Authority: CN
Inventors: 李喆; 吴恩; 谭栋
Original assignee: Guangdian Yuntong Financial Electronic Co Ltd
Current assignee: GRG Banking Equipment Co Ltd; Guangdian Yuntong Financial Electronic Co Ltd
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2010-09-01
Anticipated expiration: 2019-09-30

Abstract

The utility model relates to a medium separation device, which comprises a separation wheel and a detention wheel, wherein the detention wheel is drum-shaped. The raised radian edge of the drum-shaped detention wheel can disperse the stress of the detention wheel to medium, so that the stress of the medium in unit area is reduced, and the degree of abrasion is reduced. Preferably, the separation wheel comprises a low friction coefficient zone and a high friction coefficient zone, the radius of the low friction coefficient zone is smaller than the radius of the high friction coefficient zone, and the axial width of the low friction coefficient zone is smaller than the axial width of the high friction coefficient zone, so that the axial clearance and the radial interference at the place where the separation wheel and the detention wheel are meshed are respectively increased and reduced, and the deformation curvature of the medium, the interaction forces between the medium and the separation device as well as the abrasion of the separation device and the medium are reduced, thereby prolonging the service life.

Description

Media separating apparatus

Technical field

The utility model relates to a kind of media separating apparatus, particularly a kind of media separating apparatus that reduces wear.

Background technology

Its separation to paper class medium of existing friction-type media separating apparatus mainly is by separating wheel and stoping the engagement of taking turns, medium is bent to have the shape of certain curvature, as shown in Figure 1, crooked medium 2 is owing to the bending stiffness of self is taken turns 3 generation positive pressure and friction force to separation wheel 1 with stoping, utilize friction coefficient, prevention wheel 3 and the friction coefficient of medium 2 that separates wheel 1 and medium 2, the difference of the friction coefficient between the medium 2, guarantee only to separate a medium 2, unnecessary medium 2 is prevented from taking turns 3 to be stopped and reaches the purpose of separation at every turn.Wherein, the service conditions of media separating apparatus is: stop the friction force of taking turns 3 pairs of media 2 to take turns the friction force of 1 pair of medium 2 less than separation greater than the friction force between the medium 2.

There are following several point defects in existing media separating apparatus:

1. medium is to separating wheel and stoping the wearing and tearing of wheel big, generally in 2-3, occur separating wheel or stoping wheel owing to serious wear is scrapped, cause service life of disengagement gear being difficult to satisfy actual operating needs, the material of the equipment that has by selecting high-wearing feature for use is improving the service life of disengagement gear, but the corresponding increase of cost.

2. disengagement gear is big to the wearing and tearing of separated medium, and especially in financial self-service equipment, separated medium is generally banknote, can seriously shorten the separated number of times of medium like this, reduces the circulation life-span of medium.

By analysis, the serious reason of existing media separating apparatus wear problem mainly is that there are the following problems with the structure design that stops wheel 3 for separation wheel 1:

As shown in Figure 1 to Figure 3, stoping wheel 3, general it is shaped as cylindrical by forming for the materials such as rubber of great friction coefficient, so its axial cross section is shaped as a rectangle, and radial section is a circle, as shown in figures 1 and 3.According to paper class medium among Fig. 32 and the mutual action that stops wheel 3 as can be known, the distribution limit of load is very little and inhomogeneous in the separation process, stop the field of load of wheel 3 mainly to concentrate on 1A, 1B, 1C, 1D zone, the field of load of medium 2 mainly concentrates on 2A, 2B, 2C, 2D zone, and at medium 2 with stop wheel place, 3 right angle because stress concentration, the stressed maximum that reaches, degree of wear is also corresponding very big.

In addition, separation wheel 1 in the existing media separating apparatus circumferentially is made up of great friction coefficient zone (seeing that Fig. 1 separates the black region of wheel 1) and low friction zone territory, the flange width w and the whole circle of radius r that separate wheel 1 are constant, thus, in the whole cycle of single separating medium, the distortion curvature of medium 2 remains unchanged, and medium 2 continue to keep bigger interaction force with separating between the wheel 1, and respective media 2 is also big with the degree of wear that separates between the wheel 1.

Therefore, design very necessity of a kind of improved media separating apparatus.

The utility model content

The purpose of this utility model is to provide a kind of medium and separates wheel or stop the media separating apparatus that stress reduces, degree of wear reduces between the wheel.

Therefore, the utility model provides a kind of media separating apparatus, and it comprises that one separates a wheel and a prevention wheel, and wherein should stop wheel is cydariform.

Preferably, this separation wheel comprises a low-friction coefficient zone and a great friction coefficient zone, and the radius in this low-friction coefficient zone is less than the radius in this great friction coefficient zone.Preferred, the axial width in this low-friction coefficient zone is less than the axial width in this great friction coefficient zone.

Its protruding radian edge is taken turns in the prevention of cydariform can disperse the stress of this prevention wheel to medium, thereby makes the stress that is subjected on the medium unit area reduce, and reduces degree of wear.In addition, the radius in low-friction coefficient zone is less than the radius in great friction coefficient zone, cause separating wheel and stop the radial interference amount of wheel engagement place to increase, the axial width in low-friction coefficient zone causes separating wheel and stops the endplay of wheel engagement place to increase less than the axial width in great friction coefficient zone.At dielectric thickness and disengagement gear under the friction coefficient unmodified condition to medium, the distortion curvature of medium is with separating wheel and stoping the endplay of wheel engagement place and the increase of radial interference amount to reduce, so do the time spent in low friction zone territory and medium, the distortion curvature of medium reduces, be proportional to the distortion curvature of medium according to the interaction force of medium and disengagement gear, the interaction force that obtains medium and disengagement gear diminishes, so reduced the wearing and tearing of disengagement gear and medium, has improved the life-span.

Description of drawings

Fig. 1 is the structural representation of prior art medium disengagement gear;

Fig. 2 is the lateral plan of Fig. 1 medium disengagement gear;

Fig. 3 is the separation principle scheme drawing of prior art medium disengagement gear;

Fig. 4 be the media separating apparatus that provides of the utility model one preferred embodiment the prevention wheel construction and and medium between power effect principle schematic;

Fig. 5 is the media separating apparatus structural representation that another preferred embodiment of the utility model provides; And

Fig. 6 is the lateral plan of Fig. 5 medium disengagement gear.

The specific embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Prevention wheel construction in the utility model as shown in Figure 4, this stops wheel 3 is cydariform, therefore its axial cross section from Fig. 4, its radial edges has the certain radian R of projection, its arc top is than the high about 0.25mm in two ends, this protruding radian R can disperse the stress of 3 pairs of media 2 of this prevention wheel, thereby makes the stress that is subjected on medium 2 units area reduce, and reduces degree of wear.

Analyze from principle, the curvature of medium 2 in separation process is determined by following factor: the radially mesh volume t1 of (1), separation wheel 1 and prevention wheel 3; (2), the endplay t2 that separates wheel 1 and prevention wheel 3; (3), the thickness alpha of medium 2; (4), medium 2 and the friction coefficient f that separates wheel 1 ₁Etc. factor.

By to this analysis of Some Factors, can draw the distortion curvature of medium when separated and meet following formula:

Wherein: proportionality coefficient k is decided by the material and the kind of banknote, therefore when the radius of deformation of cydariform radius that stops wheel 3 and medium 2 is identical, can guarantee to stop and take turns 3 whole edge and all contact with homogeneous media, in the separation process, the distribution of load of medium 2 and prevention wheel 3 is also corresponding to be rectangular distribution, and be distributed on the whole prevention wheel 3, the distribution of load scope on the medium 2 also expands 2A and the 2B scope among Fig. 4 to.Compare with prior art shown in Figure 3, in the mode shown in Figure 4, interactional total the making a concerted effort of disengagement gear and medium is identical, and the active area of wheel 3 of the prevention among Fig. 4 and medium 2 is far longer than mode shown in Figure 3.According to the stress p=F/A of unit area, so with respect to prevention wheel of the prior art, the stress of the prevention wheel 3 in the utility model and the unit area of medium 2 zones of action descends significantly, has reduced mutual wearing and tearing.

Separation in the utility model is taken turns 1 structure as shown in Figure 5, the radius of high friction area 11 and width are respectively r and w, all identical with the radius and the width of the high friction area that separates wheel of the prior art, and the radius in low friction zone territory 12 is reduced to r1, width is reduced to w1.In the cycle of separating medium 2, separating wheel 1 clockwise rotates, at first high friction area 11 contacts with medium 2, medium 2 front ends enter in the back lash of separating wheel 1 and prevention wheel 3, this moment, the deformation state of medium 2 was identical with prior art shown in Figure 3, so the interaction force of disengagement gear and medium also is same as shown in Fig. 3 and installs, high then friction area 11 leaves medium 2, this moment, medium 2 separated fully with other media that pile up, 12 beginning and the medium effects of low friction zone territory, separated medium front end enters next transmission path and is pulled (not drawing among the figure), be reduced to w1 owing to separate the width in wheel 1 low friction zone territory 12 by w, radius is reduced to r1 by r, separates wheel 1 and stops the fit dimension of wheel 3 engagement places also to change, engagement radial interference amount t3=t1-(r-f1); Engagement place endplay t4=t2-(w-w1), comparison diagram 1 and Fig. 5 can obtain: t3＞t1, t4＞t2; At dielectric thickness and disengagement gear under the friction coefficient unmodified condition to medium, the distortion curvature of medium 2 is with separating wheel 1 and stoping the endplay of wheel 3 engagement places and the increase of radial interference amount to reduce, so do the time spent in low friction zone territory 12 and medium 2, the distortion curvature of medium reduces, be proportional to the distortion curvature of medium according to the interaction force of medium and disengagement gear, the interaction force that obtains medium and disengagement gear diminishes, so reduced the wearing and tearing of disengagement gear and medium, improved the life-span.

Only the above only is preferred embodiment of the present utility model; non-ly be intended to limit to scope of patent protection of the present utility model; so the equivalence of using the utility model specification sheets and graphic content to do such as changes, and all in like manner all is contained in the rights protection scope of the present utility model, closes and gives Chen Ming.

Claims

1. a media separating apparatus comprises that one separates a wheel and a prevention wheel, it is characterized in that this stops wheel to be cydariform.

2. media separating apparatus as claimed in claim 1, this stops the protruding radian of wheel, and its arc top is than the high about 0.25mm in two ends

3. media separating apparatus as claimed in claim 1 or 2 is characterized in that, this separation wheel comprises a low-friction coefficient zone and a great friction coefficient zone, and the radius in this low-friction coefficient zone is less than the radius in this great friction coefficient zone.

4. media separating apparatus as claimed in claim 3 is characterized in that the axial width in this low-friction coefficient zone is less than the axial width in this great friction coefficient zone.