Driving mechanism for paper feeding shaft of printer

Abstract

The utility model provides a driving mechanism for a paper feeding shaft of a printer. The driving mechanism comprises a cross beam, the paper feeding shaft, a paper feeding shaft support frame, an end support frame, a motor mounting seat and a driving motor, the number of the paper feeding shaft supporting frames is at least two, the paper feeding shaft supporting frames are installed on the cross beam, shaft sleeves are installed at the positions, matched with the paper feeding shaft supporting frames, of a shaft body of the paper feeding shaft, and the shaft sleeves are installed on the paper feeding shaft supporting frames through bearings and bearing pedestals; the end supporting frame is arranged at one end of the cross beam, an end bearing seat is arranged on the inner side of the end supporting frame, a via hole is formed in the position, corresponding to the axis of the end bearing seat, of the end supporting frame, and one end of the paper feeding shaft penetrates through the via hole; a motor mounting seat is arranged on the outer side of the end supporting frame, the driving motor is mounted on the motor mounting seat, and a transmission shaft is coaxially and directly connected with one end of the paper feeding shaft. The driving mechanism for the paper feeding shaft of the printer has the advantages of stronger power, higher stability and higher movement precision.

Description

Technical Field

[0001] The utility model relates to a transmission mechanism of a printer, in particular to a paper feed shaft driving mechanism of a printer. Background Art

[0002] The printer paper feed shaft is a main drive shaft in the printer system used to drive the printing medium to pass smoothly across the printing platform. The main difference between it and other steering shafts is that the printer paper feed shaft is powered. At present, the power of the printer paper feed shaft mainly comes from other motors in the roller system that synchronously drive the paper feed shaft to rotate through a transmission belt or chain.

[0003] As the speed of the printer increases, the width of the printer head and the printing platform also increases accordingly, which increases the movement resistance of the printer's paper feed shaft and the inertia of the printer's paper feed shaft itself. During high-speed printing, this drive method through chains and transmission belts can no longer meet high-speed printing requirements.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content

[0005] The utility model aims to address the deficiencies of the prior art, thereby providing a printer paper feed shaft driving mechanism with stronger power, higher stability and higher motion accuracy.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a printer paper feed shaft driving mechanism, including a crossbeam, a paper feed shaft, a paper feed shaft support frame, an end support frame, a motor mounting seat and a driving motor;

[0007] The paper feed shaft support frame is provided with two, the paper feed shaft support frame is installed on the crossbeam, and a shaft sleeve is installed on the shaft body of the paper feed shaft at the position where the shaft body of the paper feed shaft cooperates with the paper feed shaft support frame, and the shaft sleeve is installed on the paper feed shaft support frame through a bearing and a bearing seat;

[0008] The end support frame is arranged at one end of the crossbeam, an end bearing seat is arranged on the inner side of the end support frame, a through hole is arranged at the axis center of the end support frame corresponding to the end bearing seat, and one end of the paper feed shaft passes through the through hole;

[0009] A motor mounting seat is arranged on the outer side of the end support frame, the driving motor is mounted on the motor mounting seat and the transmission shaft is coaxially and directly connected with one end of the paper feeding shaft.

[0010] Based on the above, the motor is a stepper motor or a servo motor.

[0011] Based on the above, the length of the paper feed shaft is ≥2m.

[0012] Based on the above, the paper feed shaft support frame is an overall hollow inverted step structure, the lower end of the paper feed shaft support frame is fixed to the crossbeam through a pad and bolts, and the upper end of the paper feed shaft support frame forms a horizontal mounting surface.

[0013] Based on the above, an arc groove is arranged on the upper end surface of the paper feed shaft support frame, the main body of the bearing seat is installed on the side of the paper feed shaft support frame, and the axis of the bearing in the bearing seat is coaxially arranged with the axis of the arc groove.

[0014] Based on the above, a stop ring is arranged on the paper feeding shaft adjacent to the shaft sleeve.

[0015] Based on the above, a plurality of paper feeding bushings are arranged on the paper feeding shaft at equal intervals.

[0016] Based on the above, the motor is a reduction motor.

[0017] Based on the above, the cross beam is a cross beam with a rectangular frame cross section.

[0018] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model adopts a motor direct drive mode to directly connect with the paper feed shaft. The motor adopts a high-precision controlled motor, which can provide high speed and stronger control ability at the same time, realizing emergency stop and emergency start at high speed, and effectively avoiding the problem of buffering during braking and starting due to inertia caused by belt drive in the traditional solution; and the rotation of the paper feed shaft is maintained by bearings, avoiding the arc groove method in the traditional solution and ensuring stability.

[0019] Furthermore, in order to ensure the stability of high-speed drive and overcome the problem of thin paper feed shaft and difficult transmission, the shaft diameter can be increased by adding shaft sleeves to ensure the stability of rotation. At the same time, the number of paper feed shaft support frames can be reduced to two to avoid the problem of excessive support frames causing easy deviation and collision at high speed.

[0020] Furthermore, the paper feed shaft support frame also needs to be installed with a printing platform, so the support arch of the paper feed shaft should not be too high. Therefore, the bearing seat of the paper feed shaft is installed on one side of the support frame by side hanging, so that the modified height of the paper feed shaft is the same as the original height. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a paper feed shaft driving mechanism of a printer in the utility model.

[0022] Figure 2 It is a structural schematic diagram of the bearing of the paper feed shaft of the printer in the utility model.

[0023] Figure 3 It is a structural schematic diagram of the end support frame in the utility model.

[0024] In the figure: 1. crossbeam; 2. paper feed shaft; 3. paper feed shaft support frame; 4. end support frame; 5. motor mounting seat; 6. drive motor; 7. bushing; 8. bearing; 9. bearing seat; 10. end bearing seat; 11. arc groove; 12. stop ring; 13. paper feed bushing. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0026] like Figure 1-Figure 3 As shown, a paper feed shaft driving mechanism of a printer includes a crossbeam 1, a paper feed shaft 2, a paper feed shaft support frame 3, an end support frame 4, a motor mounting seat 5 and a driving motor 6.

[0027] In this embodiment, the crossbeam 1 is a crossbeam with a rectangular cross section, which is dedicated to supporting the paper feed shaft 2 and the driving mechanism. The crossbeam 1 itself is fixed based on the frame of the printer, with the same reference as other mechanisms to ensure the accuracy of the structural installation.

[0028] The paper feed shaft support frame 3 is provided with two, and the paper feed shaft support frame 3 is installed on the crossbeam 1. A shaft sleeve 7 is installed on the shaft body of the paper feed shaft 2 at the position where it cooperates with the paper feed shaft support frame 3. The shaft sleeve 7 is installed on the paper feed shaft support frame 3 through a bearing 8 and a bearing seat 9.

[0029] The number of paper feed shaft support frames 3 is greatly reduced compared to the traditional number, and the addition of the shaft sleeve 7 makes the rotation diameter of the paper feed shaft 2 larger, and the stability is higher under high-speed operation, and the interference from the paper feed shaft support frames 3 is less.

[0030] The end support frame 4 is arranged at one end of the crossbeam 1, an end bearing seat 10 is arranged on the inner side of the end support frame 4, a through hole is arranged at the axis center of the end support frame 4 corresponding to the end bearing seat 10, and one end of the paper feed shaft 2 passes through the through hole;

[0031] A motor mounting seat 5 is arranged outside the end support frame 4 , the driving motor 6 is mounted on the motor mounting seat 5 and the transmission shaft is coaxially and directly connected to one end of the paper feeding shaft 2 .

[0032] This method is used to realize direct drive of the paper feed shaft. Compared with traditional belt drive, the hysteresis problem caused by rapid braking and rapid starting due to inertia under high speed and high load conditions is solved, achieving high-precision drive under high-speed printing.

[0033] In this embodiment, the motor is a stepper motor or a servo motor, which can be actively or passively driven with high time precision. The motor can also be designed as a reduction motor with a certain reduction ratio.

[0034] In a preferred embodiment, the length of the paper feed shaft is ≥ 2 m, which is usually a large-span printer product.

[0035] In a preferred embodiment, the paper feed shaft support frame 3 is an overall hollow inverted step-shaped structure, the lower end of the paper feed shaft support frame 3 is fixed to the crossbeam 1 by a pad and bolts, and the upper end of the paper feed shaft support frame 3 forms a horizontal mounting surface. In addition to assembling the paper feed shaft, it also needs to serve as a part of the support structure of the printing platform.

[0036] The upper end surface of the paper feed shaft support frame 3 is provided with an arc groove 11. The arc groove 11 is a common structure in traditional printers and provides a benchmark and reference for various sizes. This scheme still retains this structure, but it is no longer used as the main supporting structure of the paper feed shaft 2. The main part of the bearing seat 9 is installed on the side of the paper feed shaft support frame 3. The axis of the bearing 8 in the bearing seat 9 is coaxially arranged with the axis of the arc groove 11. The bearing seat cooperates with the bearing to support the paper feed shaft 2, replacing the supporting function of the arc groove 11.

[0037] In this embodiment, a stop ring 12 is provided on the paper feed shaft 2 adjacent to the shaft sleeve to ensure the running stability of the paper feed shaft.

[0038] A plurality of paper feeding bushings 13 are arranged at equal intervals on the paper feeding shaft 2 for supporting the printing medium.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A printer paper feed shaft driving mechanism, characterized in that: It includes a crossbeam, a paper feed shaft, a paper feed shaft support frame, an end support frame, a motor mounting seat and a driving motor; The paper feed shaft support frame is provided with two, the paper feed shaft support frame is installed on the crossbeam, and a shaft sleeve is installed on the shaft body of the paper feed shaft at the position where the shaft body of the paper feed shaft cooperates with the paper feed shaft support frame, and the shaft sleeve is installed on the paper feed shaft support frame through a bearing and a bearing seat; The end support frame is arranged at one end of the crossbeam, an end bearing seat is arranged on the inner side of the end support frame, a through hole is arranged at the axis center of the end support frame corresponding to the end bearing seat, and one end of the paper feed shaft passes through the through hole; A motor mounting seat is arranged on the outer side of the end support frame, the driving motor is mounted on the motor mounting seat and the transmission shaft is coaxially and directly connected with one end of the paper feeding shaft.

2. The printer paper feed shaft driving mechanism according to claim 1, characterized in that: The motor is a stepper motor or a servo motor.

3. The printer paper feed shaft driving mechanism according to claim 1 or 2, characterized in that: The length of the paper feed shaft is ≥2m.

4. The printer paper feed shaft driving mechanism according to claim 1 or 2, characterized in that: The paper feed shaft support frame is an overall hollow inverted step-shaped structure. The lower end of the paper feed shaft support frame is fixed to the crossbeam through a cushion block and bolts, and the upper end of the paper feed shaft support frame forms a horizontal installation surface.

5. The printer paper feed shaft driving mechanism according to claim 4, characterized in that: The upper end surface of the paper feed shaft support frame is provided with an arc groove, the main body of the bearing seat is installed on the side of the paper feed shaft support frame, and the axis of the bearing in the bearing seat is coaxially arranged with the axis of the arc groove.

6. The printer paper feed shaft driving mechanism according to claim 5, characterized in that: A stop ring is arranged on the paper feeding shaft adjacent to the shaft sleeve.

7. The printer paper feed shaft driving mechanism according to claim 6, characterized in that: A plurality of paper feeding bushings are arranged on the paper feeding shaft at equal intervals.

8. The printer paper feed shaft driving mechanism according to claim 1, characterized in that: The motor is a reduction motor.

9. The printer paper feed shaft driving mechanism according to claim 7, characterized in that: The cross beam is a cross beam with a rectangular frame cross section.

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