Power driving device of paper feeding mechanism

Abstract

The invention discloses a power driving device of a paper feeding mechanism. Comprising a paper feeding channel frame, a first reduction gear, a first transition gear, a planetary gear assembly, a second reduction gear and a paper feeding support, wherein the first reduction gear is arranged on the paper feeding channel frame and meshed with a power driving wheel; the first transition gear is meshed with the first reduction gear; the second transition gear is arranged on the side face of the paper feeding support and meshed with the second reduction gear, the friction gear is meshed with the second transition gear, the front end of the gear transmission shaft is meshed with the friction gear, and the paper feeding wheel installation support is arranged in the paper feeding support. The rear end of the gear transmission shaft is arranged in a cavity of the paper feeding support and connected with the paper feeding wheel installation support, paper feeding wheels making contact with paper are arranged at the two ends of the paper feeding wheel installation support, and an elastic piece is arranged between the paper feeding channel frame and the paper feeding support. The cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of printers, and in particular to a power driving device of a paper feeding mechanism. Background Art

[0002] At present, there are two main paper feeding solutions for printers on the market. One is to add a power source and connect the two motors through a sensor. This solution not only adds a power source, but also increases the corresponding hardware control cost. The other is to use a complex mechanism transmission, with one power source realizing multiple output mechanisms, and at the same time providing positive pressure to the friction gear through a tension spring. This existing structure has certain defects, and paper loading is not so smooth. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a power drive device for a paper feeding mechanism, which switches power transmission on and off through a planetary bracket, thereby meeting the conditions for feeding and moving paper, thereby ensuring paper moving accuracy, having a simple structure, high paper feeding reliability, convenient paper loading and low cost.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is a power drive device of a paper feeding mechanism, comprising: a paper feeding channel frame, a first reduction gear arranged on the paper feeding channel frame and meshing with a power driving wheel, a first transition gear meshing with the first reduction gear, a planetary gear assembly, a second reduction gear meshing with the planetary gear assembly, a paper feeding bracket, a second transition gear arranged on the side of the paper feeding bracket and meshing with the second reduction gear, a friction gear meshing with the second transition gear, a gear transmission shaft with a front end meshing with the friction gear, and a paper feeding wheel mounting bracket arranged in the paper feeding bracket, the rear end of the gear transmission shaft is arranged in the cavity of the paper feeding bracket and connected to the paper feeding wheel mounting bracket, paper feeding wheels in contact with paper are arranged at both ends of the paper feeding wheel mounting bracket, and an elastic member is arranged between the paper feeding channel frame and the paper feeding bracket; When the power driving wheel rotates counterclockwise, the planetary gear assembly swings forward to approach the second transition gear and meshes with it, and the paper feeding bracket rotates toward the paper direction to realize paper feeding; when the power driving wheel rotates clockwise, the planetary gear assembly swings reversely and breaks the meshing with the second transition gear, and the paper feeding bracket rotates away from the paper direction to facilitate paper printing.

[0005] In a preferred embodiment of the present invention, the side of the paper feeding channel frame is arranged with a first pin, a second pin, a third pin and a fourth pin, the first reduction gear is installed on the first pin, the first transition gear is installed on the second pin, and the second transition gear is installed on the fourth pin.

[0006] In a preferred embodiment of the present invention, the planetary gear assembly includes a planetary bracket with one end arranged on a third pin, a first planetary gear arranged on the third pin and located above the planetary bracket, and a second planetary gear arranged on the other end of the planetary bracket, the first planetary gear is meshed with the first transition gear, and the second planetary gear is meshed with the first planetary gear.

[0007] In a preferred embodiment of the present invention, the other end of the planetary bracket has a first support arm and a second support arm that are separated, the first support arm is provided with a first arc-shaped column, the second support arm is provided with a second arc-shaped column, the first column and the second column together form a positioning column for installing the second planetary gear.

[0008] In a preferred embodiment of the present invention, the paper feeding bracket has a mounting end, a fifth pin and a sixth pin are arranged on the front side of the mounting end, a seventh pin coaxial with the fifth pin is arranged on the back side of the mounting end, and a mounting hole is provided on the paper feeding channel frame, and the paper feeding bracket is connected to the paper feeding channel frame by the seventh pin penetrating the mounting hole.

[0009] In a preferred embodiment of the present invention, the second transition wheel is mounted on the fifth pin, the friction gear is mounted on the sixth pin, a friction plate is provided on the inner side of the friction gear on the sixth pin, and a compression spring is provided on the outer side of the friction gear and is tightened and fixed by a fastening screw.

[0010] In a preferred embodiment of the present invention, a first limiting block for preventing the second planetary gear from swinging and contacting the first transition wheel is disposed on the side of the paper feeding channel frame.

[0011] In a preferred embodiment of the present invention, a second limiting block for limiting the rotation angle of the paper feeding support is further provided on the side of the paper feeding channel frame.

[0012] In a preferred embodiment of the present invention, a first hook is provided on the paper feeding channel frame, a second hook is provided on the paper feeding bracket, and two ends of the elastic member are respectively hung on the first hook and the second hook.

[0013] In a preferred embodiment of the present invention, the elastic member is a tension spring.

[0014] The beneficial effects of the present invention are as follows: through the design of the planetary bracket, power transmission is turned on and off, thereby meeting the conditions for paper feeding and paper moving, and increasing the friction resistance between the second planetary gear and the planetary bracket can increase the tangential force of the planetary bracket, and this tangential force can ensure the swing of the planetary bracket; the paper feeding bracket can be regarded as a large planetary bracket, which realizes the contact and disconnection between the paper feeding wheel and the paper, and the tangential force of the paper feeding bracket is greatly increased by the friction plate, thereby ensuring the positive pressure required by the paper feeding wheel, and then converting the positive pressure into friction force, and the paper feeding wheel rotates under the drive of the gear set, generating paper feeding force and starting paper feeding, and this power drive structure is simple and compact, low cost and highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a schematic diagram of the paper feeding channel structure of a preferred embodiment of the present invention; Figure 2 It is a partial explosion schematic diagram of a preferred embodiment of the present invention; Figure 3 is a schematic structural diagram of a planetary gear assembly of the present invention; Figure 4 It is the paper feeding operation diagram of the present invention.

[0016] Figure 5 It is the printing operation diagram of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-5The present invention provides a power drive device for a paper feeding mechanism, comprising: a paper feeding channel frame 1, a first reduction gear 3 arranged on the paper feeding channel frame and meshing with a power driving wheel 2, a first transition gear 4 meshing with the first reduction gear, a planetary gear assembly, a second reduction gear 5 meshing with the planetary gear assembly, a paper feeding bracket 6, a second transition gear 7 arranged on the side of the paper feeding bracket and meshing with the second reduction gear, a friction gear 8 meshing with the second transition gear, a gear transmission shaft 9 meshing with the friction gear at the front end, and a paper feeding wheel mounting bracket 10 arranged in the paper feeding bracket, wherein the gear transmission shaft comprises a front gear 91 and a rear transmission shaft 92, the front gear meshing with the friction gear, the rear transmission shaft 92 is arranged in a cavity of the paper feeding bracket and connected to the paper feeding wheel mounting bracket to realize synchronous rotation, the paper feeding wheel mounting bracket is arranged in a semicircular groove 64 in the cavity of the paper feeding bracket, and paper feeding wheels 11 in contact with paper are installed at both ends, When the power driving wheel rotates counterclockwise, the planetary gear assembly swings forward and approaches the second transition gear and meshes with it, driving the paper feeding bracket to rotate toward the paper to achieve paper feeding; when the power driving wheel rotates clockwise, the planetary gear assembly swings reversely and breaks the meshing with the second transition gear, driving the paper feeding bracket to rotate away from the paper to facilitate paper printing.

[0019] Further, the side of the paper feeding channel frame is arranged with a first pin 101, a second pin 102, a third pin 103 and a fourth pin 104, the first reduction gear is mounted on the first pin, the first transition gear is mounted on the second pin, and the second transition gear is mounted on the fourth pin. Specifically, the planetary gear assembly includes a planetary bracket 12 with one end mounted on the third pin, a first planetary gear 13 mounted on the third pin and located above the planetary bracket, and a second planetary gear 14 mounted on the other end of the planetary bracket, and the other end of the planetary bracket has a separated first support arm 121 and a second support arm 122, the first support arm is provided with an arc-shaped first cylinder 123, the second support arm is provided with an arc-shaped second cylinder 124, the first cylinder and the second cylinder are enclosed to form a positioning cylinder for installing the second planetary gear, the first planetary gear is meshed with the first transition gear, the second planetary gear is meshed with the first planetary gear, the second planetary gear is installed on the positioning cylinder and has a certain friction resistance when rotating, the friction resistance between the second planetary gear and the planetary bracket is increased, and the tangential force can be added to the planetary bracket, and this tangential force can ensure the swing of the planetary bracket.

[0020] Furthermore, the paper feeding bracket has a mounting end 60, a fifth pin 61 and a sixth pin 62 are provided on the front side of the mounting end, a seventh pin 63 coaxial with the fifth pin is provided on the reverse side of the mounting end, a mounting hole 105 is provided on the paper feeding channel frame, the paper feeding bracket is connected to the paper feeding channel frame through the seventh pin penetrating the mounting hole, wherein an elastic member 15 is provided between the paper feeding channel frame and the paper feeding bracket, a first hook 108 is provided on the paper feeding channel frame, a second hook 65 is provided on the paper feeding bracket, two ends of the elastic member are respectively hung on the first hook and the second hook, and in this embodiment, the elastic member is a tension spring.

[0021] Specifically, the second transition wheel is installed on the fifth pin, the friction gear is installed on the sixth pin, a friction plate 16 is provided on the inner side of the friction gear on the sixth pin, a compression spring 17 is provided on the outer side of the friction gear and is tightened and fixed by a fastening screw 18. The friction plate greatly increases the tangential force of the paper feeding bracket, thereby ensuring the positive pressure required for the paper feeding wheel.

[0022] When the power driving wheel rotates counterclockwise, it drives the first reduction gear to rotate clockwise, the first transition gear rotates counterclockwise, and the first planetary gear rotates clockwise, thereby driving the second planetary gear counterclockwise. The second planetary gear is installed on the positioning column and has a certain friction resistance when driven to rotate. The friction resistance between the second planetary gear and the planetary bracket is increased, which can increase the tangential force to the planetary bracket and ensure the swing of the planetary bracket. The planetary bracket swings clockwise and meshes with the second reduction gear, thereby driving the second reduction gear to rotate clockwise, driving the second transition gear on the paper feeding bracket to rotate counterclockwise, and driving the friction gear to rotate clockwise. Because of the resistance of the friction plate, the paper feeding bracket is also driven to rotate counterclockwise, and the paper feeding bracket is moved toward the A4 paper. The rotational potential energy is simultaneously transmitted to the paper feeding wheel mounting bracket and the paper feeding wheel, driving the paper feeding wheel to rotate counterclockwise, and completing the downward paper feeding while pressing down.

[0023] When the power driving wheel rotates clockwise, it drives the first reduction gear to rotate counterclockwise, the first transition gear to rotate clockwise, the first planetary gear to rotate counterclockwise, the second planetary gear to rotate clockwise, and the planetary bracket to swing counterclockwise away from the second reduction gear. The planetary bracket is separated from the second reduction gear and rotates idly, discarding the part with the greatest resistance, thereby ensuring paper feeding accuracy. At the same time, the paper feeding bracket rotates clockwise under the action of the tension spring, so that the paper feeding wheel is away from the paper, and the paper is printed smoothly without external resistance.

[0024] Specifically, a first limit block 106 for preventing the second planetary gear from swinging and contacting the first transition wheel is disposed on the side of the paper feeding channel frame, and a second limit block 107 for limiting the rotation angle of the paper feeding bracket is also disposed on the side of the paper feeding channel frame.

[0025] The beneficial effects of the present invention are as follows: through the design of the planetary bracket, power transmission is turned on and off, thereby meeting the conditions for paper feeding and paper moving, and increasing the friction resistance between the second planetary gear and the planetary bracket can increase the tangential force of the planetary bracket, and this tangential force can ensure the swing of the planetary bracket; the paper feeding bracket can be regarded as a large planetary bracket, which realizes the contact and disconnection between the paper feeding wheel and the paper, and the tangential force of the paper feeding bracket is greatly increased by the friction plate, thereby ensuring the positive pressure required by the paper feeding wheel, and then converting the positive pressure into friction force, and the paper feeding wheel rotates under the drive of the gear set, generating paper feeding force and starting paper feeding, and this power drive structure is simple and compact, low cost and highly reliable.

[0026] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power drive device for a paper feeding mechanism, characterized in that: include: A paper feeding channel frame, a first reduction gear arranged on the paper feeding channel frame and meshing with a power driving wheel, a first transition gear meshing with the first reduction gear, a planetary gear assembly, a second reduction gear meshing with the planetary gear assembly, a paper feeding bracket, a second transition gear arranged on a side of the paper feeding bracket and meshing with the second reduction gear, a friction gear meshing with the second transition gear, a gear transmission shaft meshing with the friction gear at the front end, and a paper feeding wheel mounting bracket arranged in the paper feeding bracket, the rear end of the gear transmission shaft is arranged in the cavity of the paper feeding bracket and connected to the paper feeding wheel mounting bracket, paper feeding wheels in contact with paper are arranged at both ends of the paper feeding wheel mounting bracket, and an elastic member is arranged between the paper feeding channel frame and the paper feeding bracket; When the power driving wheel rotates counterclockwise, the planetary gear assembly swings forward to approach the second transition gear and meshes with it, and the paper feeding bracket rotates toward the paper direction to realize paper feeding; when the power driving wheel rotates clockwise, the planetary gear assembly swings reversely and breaks the meshing with the second transition gear, and the paper feeding bracket rotates away from the paper direction to facilitate paper printing.

2. A power drive device for a paper feeding mechanism according to claim 1, characterized in that: The side of the paper feeding channel frame is arranged with a first pin, a second pin, a third pin and a fourth pin, the first reduction gear is installed on the first pin, the first transition gear is installed on the second pin, and the second transition gear is installed on the fourth pin.

3. A power drive device for a paper feeding mechanism according to claim 2, characterized in that: The planetary gear assembly includes a planetary bracket with one end arranged on a third pin, a first planetary gear arranged on the third pin and located above the planetary bracket, and a second planetary gear arranged on the other end of the planetary bracket, the first planetary gear is meshed with the first transition gear, and the second planetary gear is meshed with the first planetary gear.

4. A power drive device for a paper feeding mechanism according to claim 3, characterized in that: The other end of the planetary bracket has a first support arm and a second support arm that are separated. The first support arm is provided with a first arc-shaped column, and the second support arm is provided with a second arc-shaped column. The first column and the second column together form a positioning column for installing the second planetary gear.

5. The power drive device of a paper feeding mechanism according to claim 1, characterized in that: The paper feeding bracket has a mounting end, a fifth pin and a sixth pin are arranged on the front side of the mounting end, a seventh pin coaxial with the fifth pin is arranged on the reverse side of the mounting end, a mounting hole is provided on the paper feeding channel frame, and the paper feeding bracket is connected to the paper feeding channel frame by the seventh pin penetrating the mounting hole.

6. A power drive device for a paper feeding mechanism according to claim 5, characterized in that: The second transition wheel is mounted on the fifth pin, the friction gear is mounted on the sixth pin, a friction plate is arranged on the inner side of the friction gear on the sixth pin, and a compression spring is arranged on the outer side of the friction gear and is tightened and fixed by a fastening screw.

7. The power drive device of a paper feeding mechanism according to claim 1, characterized in that: A first limiting block for preventing the second planetary gear from swinging and contacting the first transition wheel is arranged on the side of the paper feeding channel frame.

8. The power drive device of a paper feeding mechanism according to claim 1, characterized in that: A second limiting block for limiting the rotation angle of the paper feeding bracket is also arranged on the side of the paper feeding channel frame.

9. The power drive device of a paper feeding mechanism according to claim 1, characterized in that: The paper feeding channel frame is provided with a first hook, the paper feeding bracket is provided with a second hook, and two ends of the elastic member are respectively hung on the first hook and the second hook.

10. A power drive device for a paper feeding mechanism according to claim 9, characterized in that: The elastic member is a tension spring.

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