Coaxial connecting device and rotary printer

Abstract

The utility model discloses a coaxial connecting device, which comprises a first connecting part, a buffer part and a second connecting part, the buffer part is arranged between the first connecting part and the second connecting part, the first connecting part is provided with a first clamping block, the second connecting part is provided with a second clamping block, and the first clamping block and the second clamping block are arranged in parallel. And a plurality of third clamping blocks for separating the first clamping block from the second clamping block are uniformly arranged on the buffer part. According to the coaxial connecting device, the influence of the shaking of the power output shaft of the motor on the rotating center of the ink cartridge assembly of the printer can be effectively solved, and the precision of the printer is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of rotary printer accessories, and in particular to a coaxial connection device and a rotary printer. Background Art

[0002] In the field of rotary printers, the accuracy of rotary printers mainly depends on whether the current rotation angle of the nozzle is accurate, and the recognition of the angle depends on the angle encoder set synchronously with the motor. Due to the current manufacturing accuracy of the motor, the output shaft of the motor will shake when it rotates, and it cannot be completely guaranteed that the rotation center of the output shaft remains unchanged. There is also an ink cartridge assembly between the motor and the nozzle, that is, there is a certain distance between the power output shaft of the motor and the nozzle. This distance will cause the shaking of the power output shaft to have a great impact on the nozzle. If the power output shaft of the motor is directly connected to the nozzle assembly of the printer, it will cause the nozzle to be unable to ensure that the origin nozzle hole is the rotation center of the nozzle when it rotates, which seriously affects the printing quality and accuracy of rotary printing, and has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0003] The utility model provides a coaxial connection device and a rotary printer, which can solve the technical problems existing in the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows: On the one hand, the utility model provides a coaxial connection device, including a first connection part, a buffer part and a second connection part, the buffer part is arranged between the first connection part and the second connection part, the first connection part is provided with a first clamping block, the second connection part is provided with a second clamping block, the buffer part is a circular ring or disc-shaped structure, and the buffer part is provided with a plurality of third clamping blocks for separating the first clamping block from the second clamping block.

[0005] Preferably, the first base surface of the third card block is connected to the first connecting portion, the second base surface of the third card block is connected to the second connecting portion, at least one of the plurality of third card blocks is provided with a first protrusion on its first base surface, and at least one of the plurality of third card blocks is provided with a second protrusion on its second base surface.

[0006] Preferably, a first protrusion is disposed on the first base surface of each of the plurality of third clamping blocks.

[0007] Preferably, a second protrusion is disposed on the second base surface of each of the plurality of third clamping blocks.

[0008] Preferably, the second connecting portion includes an end face and a power transmission shaft, the end face is fixedly connected to the power transmission shaft, the center axis of the end face coincides with the center axis of the power transmission shaft, and the first clamping block is arranged on the end face.

[0009] Preferably, the first clamping block and the second clamping block are both fan-shaped structures, the first clamping block and the second clamping block have the same inner diameter, and the outer diameter of the buffer portion is smaller than the inner diameter of the first clamping block.

[0010] Preferably, the contact surfaces of the first clamping block, the second clamping block and the third clamping block are arcuate surfaces, and the third clamping block is provided with an arcuate surface adapted to the arcuate surfaces of the first clamping block and the second clamping block.

[0011] Preferably, there is a clearance fit between the buffer portion and the first clamping block and the second clamping block.

[0012] The second aspect of the utility model provides a rotary printer, comprising a coaxial connection device as described above, wherein the first connection portion of the coaxial connection device is used to be fixedly connected to the output shaft of the rotary printer motor, and the second connection portion of the coaxial connection device is used to be fixedly connected to the rotating component of the rotary printer.

[0013] The beneficial effect of the utility model is that by setting the first connecting part, the buffer part and the second connecting part, the utility model can prevent the error caused by slight shaking of the power output shaft of the motor connected to the first connecting part or the instability of the central axis of the power output shaft of the motor caused by process errors from being transmitted to the second connecting part, thereby effectively reducing the influence of the instability of the central axis of the power output shaft of the motor on the printer quality and printing accuracy of the ink cartridge assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic perspective view of a coaxial connection device of Example 1;

[0016] Figure 2 This is a schematic diagram of an exploded view of a coaxial connection device according to Example 1;

[0017] Figure 3 A schematic longitudinal cross-sectional view of a coaxial connection device according to Example 1

[0018] Figure 4 A coaxial connection device of embodiment 1 and Figure 3 Schematic diagram of the longitudinal section of the vertical plane

[0019] Figure 5 This is a schematic longitudinal cross-sectional view of a rotary printer according to Example 2.

[0020] Explanation of the reference numerals: 1. coaxial connection device of rotary printer; 2. rotary printer; 21. motor; 22. rotary assembly; 100. first connection part; 110. first clamping block; 120. connection hole; 200. buffer part; 210. third clamping block; 220. first protrusion; 300. second connection part; 310. second clamping block; 320. end face; 330. power output shaft. DETAILED DESCRIPTION

[0021] The principle and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0022] Embodiment 1: A coaxial connection device

[0023] like Figure 1-Figure 4As shown, the coaxial connection device of the rotary printer provided in this embodiment includes a first connection part 100, a buffer part 200 and a second connection part 300, the buffer part 200 is arranged between the first connection part 100 and the second connection part 300, the first connection part 100 is provided with a first clamping block 110 and a connection hole 120 for connecting with the motor 21, the second connection part 300 is provided with a second clamping block 310, and the buffer part 200 is provided with a third clamping block 210, and the third clamping blocks 210 are evenly distributed on the side of the buffer part 200 along the circumference. In this embodiment, the buffer part 200 is a circular ring-shaped structure, and in other embodiments it may also be a disc-shaped structure. It should be noted that since the structural members all have a certain thickness, the circular ring-shaped structure described in this embodiment refers to the cross-section of the member being a circular ring. In this embodiment, the first card block 110 and the second card block 310 are separated by the third card block 210, that is, the first card block 110 and the second card block 310 are not in contact. It should be noted that the first card block 110 and the second card block 310 are both protrusions formed by extending upward or downward from a part of the base surface of the two connecting parts facing the buffer part 200. In this embodiment, the transmission of power is mainly achieved through the cooperation between the three blocks. When the central axis of the power output shaft 330 of the motor 21 deviates, the first connecting part 100 will be offset, and the buffer part 200 also has a clearance fit between the first block 110 and the second block 310, and the buffer part 200 will slide adaptively. When the buffer part 200 slides to the force balanced position, the third block 210 will drive the second block 310 to rotate, and the position of the second block 310 will not change, and there will be no problems such as equipment failure and deviation of the ink cartridge rotation axis due to the misalignment of the central axes of the upper and lower parts of the structure.

[0024] like Figure 2 As shown, in this embodiment, there are four third clamping blocks 210, two first clamping blocks 110 and second clamping blocks 310, and a first protrusion 220 is provided on the first base surface of the four third clamping blocks 210. What is not shown in the figure is that the second base surface of the four third clamping blocks 210 is also provided with a second protrusion. In other embodiments, the first protrusion 220 and the second protrusion can be provided on different third clamping blocks 210 according to actual conditions. By providing the first protrusion 220 and the second protrusion on the third clamping block 210, it is possible to reduce the excessive friction caused by air pressure between the buffer part 200 and the first connecting part 100 and the second connecting part 300, which makes the torque between the parts too large and affects the rotation effect of the embodiment.

[0025] like Figure 2 , Figure 3 , Figure 4As shown, the second connecting portion 300 of this embodiment includes an end face 320 and a power output shaft 330 fixedly connected to the bottom surface of the end face 320, the end face 320 is connected to the buffer portion 200, the first clamping block 110 is arranged on the top surface of the end face 320, and the center axis of the end face 320 and the power output shaft 330 coincide.

[0026] In this embodiment, in order to better enable the buffer portion 200 to function when there is a deviation between the central axes of the first connection portion 100 and the second connection, the first block 110 and the second block 310 are arranged to be a fan-shaped structure, and the inner diameters of the first block 110 and the second block 310 are the same and the center line of the fan rings of the first block 110 and the second block 310 passes through the center of the end face 320.

[0027] In order to better cooperate the third card block 210 with the first card block 110 and the second card block 310, the contact surface of the first card block 110, the second card block 310 and the third card block 210 is an arc surface, and the contact surface of the third card block 210 with the first card block 110 and the second card block 310 is also provided with an arc surface adapted to the arc surface of the first card block 110 and the second card block 310, that is, in this embodiment, the arc surface of the first card block 110 and the second card block 310 is a concave arc surface, and the arc surface of the third card block 210 is a convex arc surface.

[0028] Embodiment 2: A rotary printer

[0029] like Figure 5 As shown, the rotary printer of this embodiment is provided with the rotary printer coaxial connection device 1 of embodiment 1, the first connection portion 100 of the rotary printer coaxial connection device 1 is connected to the motor 21 of the rotary printer 2, and the second connection portion 300 of the rotary printer coaxial connection device 1 is connected to the rotary component 22 of the rotary printer 2. The above embodiment can effectively reduce the influence of the shaking of the motor 21 of the rotary printer 2 or the manufacturing accuracy on the inkjet accuracy of the rotary component 22.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coaxial connection device, characterized in that: The invention comprises a first connecting part, a buffer part and a second connecting part, wherein the buffer part is arranged between the first connecting part and the second connecting part, a first card block is arranged on the first connecting part, a second card block is arranged on the second connecting part, and a plurality of third card blocks for separating the first card block from the second card block are arranged on the buffer part.

2. A coaxial connection device as claimed in claim 1, characterized in that: The first base surface of the third card block is connected to the first connecting portion, the second base surface of the third card block is connected to the second connecting portion, at least one of the plurality of third card blocks is provided with a first protrusion on its first base surface, and at least one of the plurality of third card blocks is provided with a second protrusion on its second base surface.

3. A coaxial connection device as claimed in claim 2, characterized in that: A first protrusion is arranged on the first base surface of each of the third clamping blocks.

4. A coaxial connection device as claimed in claim 2, characterized in that: A second protrusion is arranged on the second base surface of each of the third clamping blocks.

5. A coaxial connection device as claimed in claim 1, characterized in that: The second connecting portion includes an end face and a power transmission shaft, the end face is fixedly connected to the power transmission shaft, the center axis of the end face coincides with the center axis of the power transmission shaft, and the first clamping block is arranged on the end face.

6. A coaxial connection device as claimed in claim 1, characterized in that: The first clamping block and the second clamping block are both fan-shaped structures, the first clamping block and the second clamping block have the same inner diameter, and the outer diameter of the buffer portion is smaller than the inner diameter of the first clamping block.

7. A coaxial connection device as claimed in claim 6, characterized in that: The contact surfaces of the first clamping block, the second clamping block and the third clamping block are arc surfaces, and the third clamping block is provided with an arc surface adapted to the arc surfaces of the first clamping block and the second clamping block.

8. A coaxial connection device as claimed in claim 1, characterized in that: The buffer portion is clearance-fitted with the first clamping block and the second clamping block.

9. A rotary printer, characterized in that: It comprises a coaxial connection device as described in any one of claims 1 to 8, wherein the first connection portion of the coaxial connection device is used for fixed connection with the output shaft of the rotary printer motor, and the second connection portion of the coaxial connection device is used for fixed connection with the rotating component of the rotary printer.

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