CN200947165Y - Driving wheel drive mechanism and paper feeding device of paper feeding device - Google Patents

Abstract

The utility model discloses a driving wheel transmission mechanism of a paper feeding device and a paper feeding device. The driving wheel transmission mechanism of the paper feeding device is used to drive the driving wheel to drive the paper to move, and its main structure is composed of a driving shaft sleeve, a coupling shaft sleeve, and a driven block. The driving shaft sleeve is used to push the coupling shaft sleeve toward the driven block and drive the coupling shaft sleeve to rotate. The coupling shaft sleeve can be unidirectionally coupled to the driven block, thereby driving the driven block to rotate and drive the driving wheel to rotate. When the rotation speed of the driving wheel is greater than the rotation speed of the transmission shaft sleeve or the transmission shaft sleeve stops rotating, the driving wheel can continue to be rotated by other power sources without interfering with the transmission shaft sleeve.

Description

Driving wheel drive mechanism and paper feeding device of paper feeding device

technical field

The invention relates to a paper conveying mechanism of a printing device or a scanning device, in particular to a driving wheel transmission mechanism and a paper feeding device of a paper feeding device with a simple structure and avoiding paper jamming.

Background technique

At present, the paper feeding speed of the automatic paper feeding device is constantly increasing. If it is necessary to scan one paper, then pick up the paper and scan the second paper, the distance between the two papers will be too large, and the paper feeding cannot be effectively improved. And the speed of scanning, therefore, the matching of the speed of the paper pickup roller group and the paper delivery roller group has become a problem worthy of attention. Usually, the rotational speed of the driving wheel of the paper-feeding roller set is smaller than that of the paper-feeding roller set, so that the form of paper-feeding is slow and paper-feeding is fast, and a predetermined distance is formed between the front and rear paper due to the speed difference. However, fast paper feeding and slow paper feeding will cause the paper picking rollers and paper feeding rollers to interfere with each other, that is, when the leading edge of the paper reaches the paper feeding rollers, the middle and rear sections of the paper are still controlled by the paper picking rollers Under such circumstances, the two sets of rollers will interfere with each other due to the difference in speed, causing relative sliding between the paper and the driving wheel of the paper pickup roller set, which will cause the paper to wrinkle and even cause the paper to be torn. It has become an important technical issue to avoid damage to the paper caused by mutual interference between the paper-feeding roller set and the paper-feeding roller set due to the rotational speed.

In the prior art, the driving wheel of the paper-taking roller set is usually designed in a circular or semicircular structure. When the driving wheel with semicircular design is used to pick up paper, the outer peripheral edge of the semicircular part of the driving wheel is used to contact the paper to pick up the paper. After the paper picking operation is completed, the paper is conveyed by the paper feeding roller When the driving wheel stops at the non-semicircular part and faces the paper, therefore, when the paper feeding roller group receives and transmits the paper, the driving wheel of the paper picking roller group does not contact with the paper. However, with this design, since only half of the outer periphery of the drive wheel can be used to feed paper, the distance that paper can be conveyed is limited. Therefore, we can only choose to increase the size of the drive wheel to increase the transmission distance, or reduce the paper pickup roller group. The distance between the paper feeding roller group and the paper feeding roller group is used to connect the paper picking roller group with the paper feeding roller group, which leads to design restrictions.

The driving wheel of the paper pickup roller set with a circular roller design uses a one-way bearing (one-way Bearing) or springs to connect the driving wheel and its power source, that is, when the paper reaches the paper feeding roller group, the driving wheel of the paper picking roller group can form an idle state, so that the paper picking roller group and the paper feeding roller group will not interfere with each other. However, this design has the disadvantages of complex mechanism and difficult assembly.

In order to prevent the paper-feeding roller set and the paper-feeding roller set from interfering with each other, the design of the paper-feeding roller set proposed in the prior art has the problems of complex structure, difficult assembly or too many restrictions.

Utility model content

The technical problem to be solved by the utility model is to provide a driving wheel transmission mechanism of the paper feeding device, which is simple in structure and easy to assemble and produce, and can achieve the effect that the paper fetching roller group and the paper feeding roller group will not interfere with each other.

In order to achieve the above purpose, the utility model proposes a driving wheel transmission mechanism of a paper feeding device, which is used to drive a driving wheel arranged on a shaft, which includes: a driving sleeve, which is movably sleeved on the Shaft rod, one end of the transmission sleeve forms a chamfered edge, an inclination angle is formed between the chamfered edge and the rotation axis, and one end of the chamfered edge extending outward from the transmission shaft sleeve along the rotation axis forms a first a stopper; a coupling sleeve, which is movably sleeved on the shaft rod, the coupling sleeve has a first one-way coupling end and an actuating end, wherein the actuating end slides in contact with the chamfered edge, and drive the coupling shaft sleeve to displace along the axis of rotation, and the actuating end corresponds to the first stop block, so that the transmission shaft sleeve drives the coupling shaft sleeve to rotate; and a driven block is fixedly arranged on the shaft rod, the driven block has a second one-way coupling end corresponding to the first one-way coupling end, the first one-way coupling end can be unidirectionally coupled to the second one-way coupling end, through the coupling shaft The sleeve is coupled to the driven block to drive the shaft to rotate.

The drive shaft sleeve is movably sleeved on the shaft rod, and one end thereof has a notch, and a chamfered edge is formed in the notch, and an inclination angle is formed between the chamfered side and the rotation axis.

The coupling sleeve is also movably sleeved on the shaft and adjacent to the transmission sleeve. The coupling sleeve has a first one-way coupling end and an actuating end, wherein the actuating end is inserted into the recess and slidably contacts On the chamfered edge, thereby driving the coupling bushing to displace along the axis of rotation of the shaft, and the actuating end can move back and forth in the notch along the tangential direction of the shaft, and then the actuating end abuts against the notch On one side, the coupling shaft sleeve can be driven by the transmission shaft sleeve to rotate.

The driven block is fixed on the shaft, has a second one-way coupling end, and corresponds to the first one-way coupling end, and the first one-way coupling end can be unidirectionally coupled to the second one-way coupling end, that is, the first one-way coupling end The one-way coupling end is coupled to the second one-way coupling end in the first rotation direction, and is separated from the second one-way coupling end in the opposite second rotation direction.

When the transmission sleeve rotates in the first rotation direction, the coupling sleeve can be pushed towards the driven block by the chamfered edge, so that the first one-way coupling end is coupled to the second one-way coupling end, and at the same time the actuation of the coupling sleeve The end will abut against one side of the notch, and drive the coupling sleeve to rotate in the first rotation direction, and then drive the driven block and the shaft to rotate in the first rotation direction. When the transmission sleeve stops rotating and the shaft is still rotating in the first rotation direction, or the rotation speed of the shaft in the first rotation direction is greater than that of the transmission sleeve, the transmission sleeve is at the second relative to the shaft and the driven block. The rotation direction rotates, and at this moment, the first one-way coupling end and the second one-way coupling end stop the coupling relationship, so that the shaft can rotate independently without interfering with the transmission sleeve and the coupling sleeve.

Moreover, the utility model also provides a paper feeding device, including a first driving wheel, which drives a paper to move, and a shaft rod is provided on a rotation axis of the first driving wheel; a transmission shaft sleeve is movably sleeved on the shaft One end of the drive shaft sleeve forms a chamfered edge, and an inclination angle is formed between the chamfered side and the axis of rotation, and one end of the chamfered edge extending toward the outside of the transmission shaft sleeve along the axis of rotation forms a first stop stopper; a coupling sleeve, which is movably sleeved on the shaft rod, the coupling sleeve has a first one-way coupling end and an actuation end, and the actuation end slides in contact with the chamfered edge to drive the The coupling bushing is displaced along the axis of rotation, and the actuating end corresponds to the first stopper, and the transmission bushing drives the coupling bushing to rotate; a driven block is fixedly arranged on the shaft, and the driven block There is a second one-way coupling end corresponding to the first one-way coupling end, the first one-way coupling end can be unidirectionally coupled to the second one-way coupling end, and the coupling sleeve is coupled to the driven block and drive the shaft to rotate; and a second driving wheel corresponding to the first driving wheel in parallel, the second driving wheel continuously drives the paper transported by the first driving wheel to move.

The effect of the present invention is that the present invention can be applied to a paper-feeding roller set of a paper-feeding device, so that the paper-feeding roller set and the paper-feeding roller set will not interfere with each other. Compared with the paper-taking roller structure of the prior art, the present invention has the advantages of simple structure and easy manufacture and assembly.

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the detailed description is as follows in conjunction with the embodiments.

Description of drawings

Fig. 1 is the appearance stereogram of the new embodiment of the present invention;

Fig. 2 is the top view of the present model;

Fig. 3 and Fig. 4 are the enlarged schematic diagrams of some components of the embodiment of the present invention;

Fig. 5 is a top view of another state of the embodiment of the present invention.

Among them, reference signs:

210: The first driving wheel 220: The second driving wheel

300: Shaft 400: Drive shaft sleeve

410: Beveled edge 420: Notch

421: The first stopper 422: The second stopper

430: Driven part 500: Coupling sleeve

510: The first one-way coupling end 520: Actuating end

521: sliding block 600: driven block

620: Second one-way coupling end 700: Paper

800: sensing element 920: first power source

940: Second power source X: Rotation axis

Detailed ways

The driving wheel transmission mechanism disclosed in the present invention is applied to a paper-feeding device, such a paper-feeding device may be but not limited to a printer, a paper-feeding scanner or a multifunctional business machine.

Please refer to FIG. 1 and FIG. 2 , which are a perspective view and a top view of an embodiment of the present invention, respectively. The paper feeding device has a parallel corresponding first driving wheel 210 and a second driving wheel 220, wherein the first driving wheel 210 corresponds to the paper pickup roller group of the paper feeding device, and the second driving wheel 220 corresponds to the driven wheel of the paper feeding device. As for the roller set, the first driving wheel 210 is used to grab a paper 700 from a paper picking tray (not shown in the figure), and the second driving wheel 220 continues to transport the paper after it is transported. Generally speaking, the rotational speed of the second driving wheel 220 will be greater than that of the first driving wheel 210, so that a fixed distance is formed between the front and rear papers through the rotational speed difference, and when the leading edge of the paper 700 reaches the second driving wheel 220, it will also The power output to the first driving wheel 210 is stopped.

The driving wheel transmission mechanism disclosed in the present model is used to drive the first driving wheel 210. The first driving wheel 210 rotates according to a rotation axis X. The first driving wheel 210 is provided with a shaft 300 on the rotation axis X to drive the first driving wheel 210. A driving wheel 210 is mounted at a predetermined position. The drive wheel transmission mechanism includes a transmission sleeve 400 , a coupling sleeve 500 , and a driven block 600 . The detailed composition of each component is detailed as follows:

As shown in Fig. 3 and Fig. 4, the transmission sleeve 400 is movably sleeved on the shaft 300, a beveled edge 410 is formed at one end of the transmission sleeve 400, and a driven part 430 is formed at the other end. Trim 410. An inclination angle is formed between the chamfered side 410 and the rotation axis X, and one end of the chamfered side 410 extending outward along the rotation axis X toward the transmission sleeve 400 forms a first stop portion 421 , and the chamfered side 410 extends along the rotation axis X. One end of the X extending toward the inside of the transmission sleeve 400 forms a second stop portion 422 . Therefore, a notch 420 can be just formed between the first stop portion 421 and the second stop portion 422 , and the chamfered edge 410 can just be located in the notch 420 . The driven part 430 can be a gear for connecting to a first power source 920 , such as a motor, so that the transmission sleeve 400 is driven by the first power source 920 .

The coupling sleeve 500 is movably sleeved on the shaft 300 , and the coupling sleeve 500 has a first one-way coupling end 510 and an actuating end 520 . The actuating end 520 forms a protruding sliding block 521 corresponding to the first stop portion 421 , and the actuating end 520 slides in contact with the chamfered edge 410 through the sliding block 521 . When the transmission sleeve 400 rotates along a first rotation direction, the actuating end 520 can slide relative to the chamfered edge 410, and drives the coupling sleeve 500 to displace along the rotation axis X away from the transmission sleeve 400, and the first stopper 421 pushes against the sliding block 521 of the actuating end 520 to make the transmission sleeve 400 drive the coupling sleeve 500 to rotate. However, when the transmission sleeve 400 rotates in a second reverse rotation direction, it will not produce a driving effect on the coupling sleeve 500 .

The driven block 600 is fixedly disposed on the shaft 300 , and the driven block 600 has a second one-way coupling end 620 corresponding to the first one-way coupling end 510 . The first one-way coupling end 510 can be unidirectionally coupled to the second one-way coupling end 620 , so that the coupling sleeve 500 is coupled to the driven block 600 to drive the shaft 300 to rotate. Moreover, the first one-way coupling end 510 is coupled to the second one-way coupling end 620 in the first rotation direction, and is disengaged from the second one-way coupling end 620 in the opposite second rotation direction. Therefore, when the coupling sleeve 400 rotates in the first rotation direction, the coupling sleeve 500 can drive the driven block 600, and when the coupling sleeve 500 rotates in the second rotation direction, the coupling sleeve 500 will not contact the driven block. Blocks 600 are linked to each other. And the coupling sleeve 500 is pushed away from the transmission sleeve 400 when the transmission sleeve 400 rotates in the first rotation direction, and makes the first one-way coupling end 510 and the second one-way coupling end 620 abut against each other, and are coupled to each other in the first rotational direction, as shown in FIG. 4 .

As shown in FIG. 5 , refer to FIG. 2 and FIG. 3 at the same time. FIG. 5 discloses a state in which the first driving wheel 210 and the second driving wheel 220 cooperate with each other. The first power source 920 supplies power to the driven part 430 , and then drives the transmission sleeve 400 to rotate, pushes against the coupling sleeve 500 to couple with the driven block 600 , and then rotates the first driving wheel 210 . At this time, the paper 700 is driven by the first driving wheel 210 and transported toward the second driving wheel 220 . When the leading edge of the paper 700 is detected by a sensing element 800 parallel to the second driving wheel 220, the second power source 940 immediately outputs power to drive the second driving wheel 220 to rotate, and also stops the first power source 920 to drive the transmission shaft Set of 400. Because in the paper feeding device, the speed of the second driving wheel 220 as the function of paper feeding must be greater than the speed of the first driving wheel 200 of the paper taking function, or when the second driving wheel 220 touches the paper 700, the first power must be stopped. Source 920. The state at this moment forms that the first driving wheel 210 is driven by the paper 700 and rotates at a speed greater than that of the transmission sleeve 400. Therefore, the driven block 600 will rotate relative to the coupling sleeve 500 and the transmission sleeve 400 according to the second rotation direction. . Therefore, the driven block 600 will not be coupled with the coupling sleeve 500 , so that its rotation will not interfere with the first power source 920 , the transmission sleeve 400 and the coupling sleeve 500 . Therefore, the paper 700 can be fed into the paper feeding device by the second power source 940 and the second driving wheel 220 at a speed greater than the paper picking speed. Moreover, due to the speed difference between the first drive wheel 210 and the second drive wheel 220 for conveying the paper 700 , a predetermined distance between the front and rear paper sheets can also be maintained.

Of course, the utility model can also have other various embodiments, without departing from the spirit and essence of the utility model, those of ordinary skill in the art can make various corresponding changes and deformations according to the utility model , but these corresponding changes and deformations should all belong to the scope of protection of the appended claims of the present utility model.

Claims (10)

1. the driving wheel gear train of a paper carrier in order to turn a driving wheel, moves to drive a paper, one rotation of this driving wheel is provided with an axostylus axostyle, in order to this driving wheel is set up in a precalculated position, it is characterized in that this driving wheel gear train includes:

One driving sleeve, be sheathed on this axostylus axostyle movably, an end of this driving sleeve forms a bevelled edge, forms an inclination angle between this bevelled edge and this rotation, and this bevelled edge forms one first stop section along the end that this rotation extends outside this driving sleeve;

One coupling axle sleeve, be sheathed on this axostylus axostyle versatilely, this coupling axle sleeve has one first a unidirectional couplings end and an actuation ends, this actuation ends sliding contact is in this bevelled edge, and drive this coupling axle sleeve along this rotation displacement, and this actuation ends is corresponding to this first stop block, and this driving sleeve drives this coupling axle sleeve and rotates; And

One Slave Block, be fixedly set in this axostylus axostyle, this Slave Block has one second unidirectional couplings end, corresponding to this first unidirectional couplings end, this first unidirectional couplings end uniaxially is coupled in this second unidirectional couplings end, and this coupling axle sleeve is coupled in this Slave Block and drives this spindle rotation.

2. the driving wheel gear train of paper carrier according to claim 1 is characterized in that, this first unidirectional couplings end is coupled in this second unidirectional couplings end in one first sense of rotation, and breaks away from this second unidirectional couplings end in one second reverse sense of rotation.

3. the driving wheel gear train of paper carrier according to claim 2, it is characterized in that, this driving sleeve rotates along this first sense of rotation, with this bevelled edge push against this actuation ends and make this coupling axle sleeve towards this Slave Block against, this first unidirectional couplings end and this second unidirectional couplings end contact with each other.

4. the driving wheel gear train of paper carrier according to claim 1 is characterized in that, this bevelled edge towards the inner end of this driving sleeve, forms one second stop block along this rotation.

5. the driving wheel gear train of paper carrier according to claim 4 is characterized in that, forms a recess between this first stop block and this second stop block, and this bevelled edge is positioned among this recess.

6. the driving wheel gear train of paper carrier according to claim 1 is characterized in that, this actuation ends forms an outstanding sliding shoe, and sliding contact is in this bevelled edge, and corresponding to this first stop block.

7. the driving wheel gear train of paper carrier according to claim 1 is characterized in that, this driving sleeve is provided with one in order to connect the follower of a power source with respect to the other end of this bevelled edge.

8. a paper carrier is characterized in that, includes:

One first driving wheel drives a paper and moves, and a rotation of this first driving wheel is provided with an axostylus axostyle;

One driving sleeve is sheathed on this axostylus axostyle versatilely, and an end of this driving sleeve forms a bevelled edge, forms an inclination angle between this bevelled edge and this rotation, and this bevelled edge forms one first stop block along the end that this rotation extends outside this driving sleeve;

One coupling axle sleeve, be sheathed on this axostylus axostyle movably, this coupling axle sleeve has one first a unidirectional couplings end and an actuation ends, this actuation ends sliding contact is in this bevelled edge, and drive this coupling axle sleeve along this rotation displacement, and this actuation ends is corresponding to this first stop block, and this driving sleeve drives this coupling axle sleeve and rotates;

One Slave Block, be fixedly set in this axostylus axostyle, this Slave Block has one second unidirectional couplings end, corresponding to this first unidirectional couplings end, but this first unidirectional couplings end uniaxially is coupled in this second unidirectional couplings end, and this coupling axle sleeve is coupled in this Slave Block and drives this spindle rotation; And

One second driving wheel, abreast corresponding to this first driving wheel, this second driving wheel continues and drives this paper that this first driving wheel transmits and move.

9. paper carrier according to claim 8 is characterized in that, also includes a sensing element, in order to respond to the leading edge of this paper.

10. paper carrier according to claim 8 is characterized in that, also includes one first power source and one second power source, this first power source is connected with this driving sleeve, turn this driving sleeve, this second power source is connected with second driving wheel, drives this second driving wheel.

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