Conveying roller jacking mechanism, conveying mechanism and printing equipment

Abstract

The utility model discloses a transfer roller tightening mechanism, a transfer mechanism and a printing device, the transfer roller tightening mechanism comprises an input assembly and an execution assembly, the execution assembly comprises a worm, a worm gear in threaded connection with the worm, and an ejector rod in threaded connection with the worm gear; the worm gear and the worm can rotate in the circumferential direction and are fixed in the axial direction, and the ejector rod is fixed in the circumferential direction and can move in the axial direction. The input assembly drives the worm to rotate, the worm drives the worm gear to rotate, and the worm gear is in threaded fit with the ejector rod to eject the ejector rod out in the direction of the conveying rollers and tightly eject the conveying rollers. The jacking mechanism is arranged to replace an air cylinder or an oil cylinder, the conveying rollers can be jacked under the power failure condition, and a worm and worm gear transmission structure has the mechanical self-locking characteristic and can keep stable pressure in the jacking state.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a conveyor roller clamping mechanism for conveying printing media, as well as a conveying mechanism and printing equipment including the clamping mechanism. Background Technology

[0002] In printing equipment and various media conveying devices, the conveyor roller, as a core component, directly affects the accuracy of media conveying. However, during long-term operation, the conveyor roller is prone to bending deformation due to changes in media tension, affecting its normal operation. In existing technologies, traditional clamping mechanisms mostly use pneumatic or hydraulic cylinders for driving. This driving method cannot continue to clamp the conveyor roller after power or air supply is cut off. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a conveyor roller clamping mechanism, a conveying mechanism, and a printing device, so as to solve the problem that the existing conveyor roller clamping mechanism fails to clamp after the cylinder or electric drive is de-energized or the air supply is cut off.

[0004] To achieve the above objectives, a conveyor roller clamping mechanism includes an input component and an execution component. The execution component includes a worm, a worm wheel threadedly connected to the worm, and a push rod threadedly connected to the worm wheel. The worm wheel and worm are circumferentially rotatable and axially fixed, while the push rod is circumferentially fixed but axially movable. The input component drives the worm to rotate, which in turn drives the worm wheel to rotate. The worm wheel and the push rod are threadedly engaged to push the push rod towards the conveyor roller and clamp it.

[0005] As a further improvement of this utility model, the input component includes a handle and a connecting rod; one end of the connecting rod is connected to the handle, and the other end is connected to the actuation component. By rotating the handle, the connecting rod is driven to rotate, thereby transmitting power to the actuation component through the connecting rod, thereby driving the actuation component to press the conveyor roller.

[0006] As a further improvement of this utility model, the linkage includes a first linkage, a second linkage and a third linkage. The first linkage is connected to the handle, the third linkage is connected to the actuation component, and the second linkage is disposed between the first linkage and the third linkage and is connected to both the first linkage and the third linkage via a universal joint.

[0007] As a further improvement of this utility model, the part of the top rod that abuts against the conveyor roller is provided with a top block.

[0008] As a further improvement of this utility model, the top block is ball-jointed on the top rod.

[0009] As a further improvement of this utility model, an arc-shaped surface is provided on the top block, and the arc-shaped surface is adapted to the shape of the conveyor roller.

[0010] As a further improvement of this utility model, a pulley is provided on the surface of the top block that contacts the conveying roller, and the pulley is in rolling connection with the conveying roller.

[0011] A conveying mechanism is also provided, including a frame, a conveying roller disposed on the frame, and a clamping mechanism disposed on the frame, wherein the clamping mechanism is used to clamp the conveying roller, and the clamping mechanism adopts the conveying roller clamping mechanism described above.

[0012] A printing device is also provided, including a printhead and a conveying mechanism for conveying printing media, the conveying mechanism employing the aforementioned conveying mechanism.

[0013] The beneficial effects of this utility model are that by setting a clamping mechanism instead of a cylinder or oil cylinder, the conveyor roller can be clamped even when the power is off, and the worm gear transmission structure has mechanical self-locking characteristics, which can maintain stable pressure in the clamping state. Attached Figure Description

[0014] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0015] Figure 2 This is a structural diagram of the worm gear according to an embodiment of the present invention.

[0016] Reference numerals in the attached diagram: 1. Frame; 2. Conveyor roller; 3. Handle; 4. First connecting rod; 5. Second connecting rod; 6. Third connecting rod; 7. Worm gear; 8. Worm wheel; 9. Top rod; 10. Universal joint; 11. Top block; 12. Pulley; 13. Housing. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0018] Reference Figure 1-2 As shown, a conveyor roller clamping mechanism includes an input component and an execution component. The execution component includes a worm 7, a worm wheel 8 threadedly connected to the worm 7, and a push rod 9 threadedly connected to the worm wheel 8. The worm wheel 8 and the worm 7 are circumferentially rotatable and axially fixed, while the push rod 9 is circumferentially fixed but axially movable. The input component drives the worm 7 to rotate, which in turn drives the worm wheel 8 to rotate. The worm wheel 8 and the push rod 9 are threadedly engaged, pushing the push rod 9 towards the conveyor roller 2 and clamping it.

[0019] During the use of the conveyor roller 2, the conveyor belt needs to be kept taut. At the same time, the printing medium is adhered to the surface of the conveyor roller 2 by negative pressure suction. Under the dual force, the conveyor roller 2 is prone to bending deformation. Therefore, a conveyor roller 2 clamping mechanism is set up to clamp the conveyor roller 2.

[0020] In this embodiment, transmission control is achieved by setting up an input component and an execution component. A housing 13 is provided on the frame, and the worm gear 8, worm 7, and push rod 9 are all installed inside the housing 13. The worm 7 and worm gear 8 can rotate but are axially fixed within the housing 13. The push rod 9 can move axially but is circumferentially fixed. The input component drives the worm 7 to rotate, and the worm 7 drives the worm gear 8 to rotate through threaded transmission, thereby driving the push rod 9 to push out towards the conveyor roller 2, thus tightening the conveyor roller 2. This worm gear 8 and worm 7 structure has a mechanical self-locking characteristic, and can maintain the tightening state even after the input component stops inputting power, without relying on external energy, effectively improving the operational reliability and environmental adaptability of the equipment under complex working conditions.

[0021] Preferably, the input component includes a handle 3 and a connecting rod; one end of the connecting rod is connected to the handle 3 and the other end is connected to the actuation component. By rotating the handle 3, the connecting rod is driven to rotate, thereby transmitting power to the actuation component through the connecting rod, thereby driving the actuation component to press the conveyor roller 2.

[0022] In this embodiment, a purely mechanical manual drive is adopted. The operator can directly transmit power by turning the handle 3, without relying on external energy sources such as electricity or air pressure. The operation is simple and can reduce the later maintenance costs.

[0023] Preferably, the linkage includes a first linkage 4, a second linkage 5, and a third linkage 6. The first linkage 4 is connected to the handle 3, the third linkage 6 is connected to the actuation component, and the second linkage 5 is disposed between the first linkage 4 and the third linkage 6 and is connected to both the first linkage 4 and the third linkage 6 via a universal joint 10.

[0024] In this embodiment, the design of the multi-segment linkage and universal joint 10 enables a non-linear connection between the linkage and the actuator, meaning that there is no need to strictly align the positions of the handle 3 and the worm gear 7, thus avoiding the problem that the input component cannot be installed due to the limited space of the frame 1 or the dimensional deviation between the components.

[0025] Furthermore, the portion of the push rod 9 that abuts against the conveyor roller 2 is provided with a top block 11.

[0026] In this embodiment, by providing a top block 11 at the end of the top rod 9, the contact area between the actuator and the conveyor roller 2 can be effectively increased, thereby improving the actuator's ability to apply a more stable clamping force to the conveyor roller 2.

[0027] Furthermore, the top block 11 is ball-jointed on the top rod 9.

[0028] In this embodiment, the ball joint of the top block 11 can be adjusted at an angle on the top rod 9 to better tighten the conveyor roller 2.

[0029] Preferably, the top block 11 is provided with an arc-shaped surface, which is adapted to the shape of the conveyor roller 2.

[0030] In this embodiment, in order to better fit the shape of the conveyor roller 2, an arc-shaped surface is provided on the top block 11. The arc-shaped surface can fit the conveyor roller 2 more closely and can also better tighten the conveyor roller 2.

[0031] Preferably, a pulley 12 is provided on the surface of the top block 11 that contacts the conveyor roller 2, and the pulley 12 is in rolling connection with the conveyor roller 2.

[0032] In this embodiment, the pulley 12 can significantly reduce the friction between the top block 11 and the conveyor roller 2, prevent wear between the two due to friction, and also prevent the top block 11 from affecting the normal operation of the conveyor roller 2.

[0033] A conveying mechanism is also provided, including a frame 1, a conveying roller 2 disposed on the frame 1, and a clamping mechanism disposed on the frame 1. The clamping mechanism is used to clamp the conveying roller 2, and the clamping mechanism adopts the conveying roller clamping mechanism described above.

[0034] A printing device is also provided, including a printhead and a conveying mechanism for conveying printing media, the conveying mechanism employing the aforementioned conveying mechanism.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A conveyor roller clamping mechanism, characterized in that, The device includes an input component and an execution component. The execution component includes a worm, a worm wheel threadedly connected to the worm, and a push rod threadedly connected to the worm wheel. The worm wheel and worm are circumferentially rotatable and axially fixed, while the push rod is circumferentially fixed but axially movable. The input component drives the worm to rotate, which in turn drives the worm wheel to rotate. The worm wheel and the push rod are threadedly engaged, pushing the push rod towards the conveyor roller and pressing it against the conveyor roller.

2. The conveyor roller clamping mechanism according to claim 1, characterized in that, The input component includes a handle and a connecting rod; one end of the connecting rod is connected to the handle, and the other end is connected to the actuation component. By rotating the handle, the connecting rod is driven to rotate, thereby transmitting power through the connecting rod to the actuation component, which in turn drives the actuation component to press the conveyor roller.

3. The conveyor roller clamping mechanism according to claim 2, characterized in that, The linkage includes a first linkage, a second linkage, and a third linkage. The first linkage is connected to the handle, the third linkage is connected to the actuation component, and the second linkage is disposed between the first linkage and the third linkage and is connected to both the first linkage and the third linkage via a universal joint.

4. The conveyor roller clamping mechanism according to claim 1, characterized in that, The portion of the push rod that abuts against the conveyor roller is provided with a top block.

5. The conveyor roller clamping mechanism according to claim 4, characterized in that, The top block is spherically hinged to the top rod.

6. The conveyor roller clamping mechanism according to claim 5, characterized in that, The top block is provided with an arc-shaped surface, which is adapted to the shape of the conveyor roller.

7. The conveyor roller clamping mechanism according to claim 4, 5, or 6, characterized in that, A pulley is provided on the surface of the top block that contacts the conveyor roller, and the pulley is in rolling connection with the conveyor roller.

8. A conveying mechanism, characterized in that, It includes a frame, a conveyor roller disposed on the frame, and a clamping mechanism disposed on the frame, the clamping mechanism being used to clamp the conveyor roller, the clamping mechanism including the conveyor roller clamping mechanism as described in any one of claims 1 to 7.

9. A printing device, characterized in that, It includes a printhead and a conveying mechanism for conveying the print media, the conveying mechanism being the conveying mechanism as described in claim 8.

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