Screw rod group mounting structure, height adjusting mechanism and printing equipment

Abstract

The invention discloses a lead screw set installation structure which comprises a driver and a lead screw installed on an output shaft of the driver. A first screw rod mounting seat and a second screw rod mounting seat are arranged at two end parts of the screw rod; the first screw rod mounting seat and the second screw rod mounting seat are both mounted on the lifting plate; the screw rod is in threaded connection with a screw rod nut, the fixing plate is fixedly connected with a screw rod nut mounting base, the screw rod nut is fixedly connected to the screw rod nut mounting base, and the driver drives the lifting plate to move in the axial direction of the screw rod through cooperation of the screw rod, the screw rod nut, the first screw rod mounting base and the second screw rod mounting base; a gap is reserved between the lead screw nut and the lead screw nut installation base, an elastic gasket is arranged in the gap, and the lead screw nut adjusts the axial position adaptive tolerance through the elastic gasket. The elastic gasket has the deformation capacity, so that the situation that different accessories are abraded and make abnormal sounds during working due to tolerance superposition, and consequently the situation that the accessories are stuck is avoided.

Description

Technical Field

[0001] The present invention relates to a printing device, and specifically to a screw rod group installation structure, a height adjustment mechanism and a printing device. Background Art

[0002] In the prior art, before jet printing, the machine needs to automatically adjust the jet spacing according to the thickness of the medium. In this structure, a lifting plate and a fixing plate are required. The two plates slide through a slide rail, and a screw rod driven by a motor is responsible for lifting to ensure the printing height value. However, different problems will occur when different accessories are matched, such as the thickness tolerance problems of the lifting plate and the fixing plate, the matching tolerance problems of the upper and lower screw rod mounting seats, etc. These related problems accumulate, resulting in problems such as jamming, noise, and wear when the screw rod drives the lifting plate. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a screw rod group installation structure, a height adjustment mechanism and a printing device, which can prevent wear and abnormal noise from occurring when different accessories work due to tolerance superposition, thus avoiding the situation of jamming.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A screw rod group installation structure includes a driver and a screw rod installed on the output shaft of the driver; first and second screw rod mounting seats are provided at two ends of the screw rod; both the first screw rod mounting seat and the second screw rod mounting seat are installed on a lifting plate; a screw rod nut is threadedly connected to the screw rod, and a screw rod nut mounting seat is fixedly connected to a fixing plate, and the screw rod nut is fixedly connected to the screw rod nut mounting seat. The driver drives the lifting plate to move axially along the screw rod through the cooperation of the screw rod, the screw rod nut, the first screw rod mounting seat and the second screw rod mounting seat; a gap is left between the screw rod nut and the screw rod nut mounting seat, and an elastic gasket is arranged in this gap, and the screw rod nut adjusts the axial position through the elastic gasket to adapt to the tolerance.

[0005] As a further improvement of the present invention, the screw rod nut and the screw rod nut mounting seat are connected by a screw rod. A through hole for inserting the screw rod is provided on the screw rod nut, and a threaded hole for inserting the screw rod is provided on the screw rod nut mounting seat.

[0006] As a further improvement of the present invention, a screw rod limit sleeve is sleeved on the screw rod, and a limiting surface is provided on the screw rod nut mounting seat corresponding to the position of the screw rod limit sleeve; the screw rod limit sleeve and the limiting surface cooperate with each other to limit the screw rod; the screw rod and the screw rod limit sleeve also pass through the elastic gasket.

[0007] As a further improvement of the present invention, the material of the elastic gasket is silicone or rubber.

[0008] As a further improvement of the present invention, an installation hole for installing the lead screw nut is provided on the lead screw nut mounting seat, at least a part of the lead screw nut is inserted into the installation hole, and there is a gap between the lead screw nut and the inner wall of the installation hole. At least a part of the elastic gasket also extends into the gap to enable the lead screw nut to adapt to the tolerance in the radial direction of the lead screw.

[0009] As a further improvement of the present invention, the second lead screw mounting seat includes a base fixedly connected to the lifting plate and a second bearing mounted on the base. The lead screw is inserted into and axially fixed to the inner ring of the second bearing. An assembly hole for assembling the second bearing is provided on the base. The outer ring of the second bearing cooperates with the assembly hole to limit the swing of the lead screw, and the outer ring can axially move relative to the hole wall of the assembly hole.

[0010] As a further improvement of the present invention, a coupling is provided between the lead screw and the driver.

[0011] As a further improvement of the present invention, a height adjustment mechanism includes a lifting plate and a fixing plate mounted on the lifting plate. The lifting plate and the fixing plate are equipped with a driving component for moving the fixing plate on the lifting plate. The driving component includes the lead screw group mounting structure as described in any one of the above.

[0012] As a further improvement of the present invention, a printing device includes a print head, a printing platform, and a height adjustment mechanism for adjusting the height of the print head. This height adjustment mechanism adopts the above-mentioned height adjustment mechanism.

[0013] The beneficial effect of the present invention is that there is a gap between the lead screw nut and the lead screw nut mounting seat, and an elastic gasket is arranged in the gap. The elastic gasket has the ability to deform, which can help the lead screw nut adjust its axial position to adapt to the tolerance, preventing wear and abnormal noise generated by different components during operation due to tolerance stacking, thereby avoiding the occurrence of jamming. Description of the Drawings

[0014] Figure 1 It is the front view of the embodiment of the present invention; Figure 2 It is the right rear view of the embodiment of the present invention; Figure 3 It is the right front view of the embodiment of the present invention; Figure 4 It is the main sectional view of the embodiment of the present invention.

[0015] Reference numerals: 1, lifting plate; 2, fixed plate; 3, drive; 4, lead screw; 5, lead screw nut; 6, lead screw nut mounting seat; 7, elastic gasket; 8, screw; 9, mounting hole; 10, first lead screw mounting seat; 11, second lead screw mounting seat; 12, base; 13, second bearing; 14, coupling; 15, screw limit sleeve; 16, print head. Detailed implementation

[0016] The present invention will be further described in detail below with reference to the embodiments shown in the drawings.

[0017] Refer to Figures 1-4 As shown, a lead screw group mounting structure includes a drive 3 and a lead screw 4 mounted on the output shaft of the drive 3; first lead screw mounting seat 10 and second lead screw mounting seat 11 are provided at both ends of the lead screw 4; the first lead screw mounting seat 10 and the second lead screw mounting seat 11 are both mounted on the lifting plate 1; a lead screw nut 5 is threadedly connected to the lead screw 4, a lead screw nut mounting seat 6 is fixedly connected to the fixed plate 2, the lead screw nut 5 is fixedly connected to the lead screw nut mounting seat 6, and the drive 3 drives the lifting plate 1 to move axially along the lead screw 4 through the cooperation of the lead screw 4, the lead screw nut 5, the first lead screw mounting seat 10, and the second lead screw mounting seat 11; a gap is left between the lead screw nut 5 and the lead screw nut mounting seat 6, and an elastic gasket 7 is provided in this gap, and the lead screw nut 5 adjusts its axial position to adapt to the tolerance through the elastic gasket 7.

[0018] In the embodiment of the present invention, the drive 3 has a manual module and an automatic module, which can meet the requirements in different scenarios; the first lead screw mounting seat 10 and the second lead screw mounting seat 11 at both ends of the lead screw 4 can make the lead screw 4 stable during rotation and prevent the lead screw 4 from shaking during rotation; when the drive 3 operates, the drive 3 drives the lead screw 4 to rotate, and the lead screw 4, the lead screw nut 5, the first lead screw mounting seat 10, and the second lead screw mounting seat 11 cooperate to drive the lifting plate 1 to move axially along the lead screw 4, and the cooperation relationship between the components is close, and the desired effect can be achieved; mutually cooperating guide rails are provided on the lifting plate 1 and the fixed plate 2, and the guide rails can make the lifting plate 1 move more smoothly; there will be tolerances during the assembly of the lead screw 4, the lead screw nut 5, and the lead screw nut mounting seat 6, and the tolerances will be superimposed. Therefore, a gap is reserved in advance between the lead screw nut 5 and the lead screw nut mounting seat 6, and an elastic gasket 7 is provided in the gap. The elastic gasket 7 has the characteristic of being deformable, and the lead screw nut 5 adjusts its axial position to adapt to the tolerance through the elastic gasket 7; by adding the elastic gasket 7 between the lead screw nut 5 and the lead screw nut mounting seat 6 in this simple way, the problem of tolerance superposition between the above-mentioned fittings is solved, and it is prevented that different fittings are worn and make abnormal noises during work due to tolerance superposition, resulting in a stuck situation.

[0019] Preferably, a screw rod 8 is used to connect the lead screw nut 5 and the lead screw nut mounting seat 6. The lead screw nut 5 is provided with a through hole for the screw rod 8 to be inserted, and the lead screw nut mounting seat 6 is provided with a threaded hole for the screw rod 8 to be inserted.

[0020] In the embodiment of the invention, using the screw rod 8 can strengthen the connection between the lead screw nut 5 and the lead screw nut mounting seat 6, and the screw rod 8 can also adjust the tightness of the connection between the lead screw nut 5 and the lead screw nut mounting seat 6, preventing damage to the lead screw nut 5 and the lead screw nut mounting seat 6 caused by over - connection.

[0021] Preferably, a screw rod limiting sleeve 15 is sleeved on the screw rod 8, and a limiting surface is arranged on the lead screw nut mounting seat 6 corresponding to the position of the screw rod limiting sleeve 15; the screw rod limiting sleeve 15 and the limiting surface cooperate with each other to limit the screw rod 8; the screw rod 8 and the screw rod limiting sleeve 15 also pass through the through hole and the elastic gasket 7.

[0022] In the embodiment of the present invention, the screw rod limiting sleeve 15 is arranged in the through hole, and one end of the screw rod limiting sleeve 15 abuts against the head of the screw rod 8, and the other end abuts against the limiting surface; when the screw rod 8 is inserted into the through hole, the screw rod limiting sleeve 15 will limit the screw rod 8 and control the insertion depth of the screw rod 8, which can prevent the installation between the lead screw nut 5 and the lead screw nut mounting seat 6 from being locked, and there is no gap at the same time, which can reduce problems such as jamming and abnormal noise generated in actual operation.

[0023] Preferably, the material of the elastic gasket 7 is silica gel or rubber.

[0024] In the embodiment of the present invention, the materials of rubber and silica gel have the advantages of high elasticity, wear resistance, low cost, mature technology and aging resistance.

[0025] Preferably, the lead screw nut mounting seat 6 is provided with a mounting hole 9 for mounting the lead screw nut 5, and at least a part of the lead screw nut 5 is inserted into the mounting hole 9 and has a gap with the inner wall of the mounting hole 9, and at least a part of the elastic gasket 7 also extends into the gap to adapt the tolerance of the lead screw nut 5 in the radial direction of the lead screw 4.

[0026] In the embodiment of the present invention, inserting the lead screw nut 5 into the mounting hole 9 can strengthen the connection between the lead screw nut 5 and the lead screw nut mounting seat 6; a part of the elastic gasket 7 also penetrates into the gap; the connection between the lead screw nut 5, the lead screw nut mounting seat 6 and the elastic gasket 7 is tight but there is a gap, and the elastic gasket 7 has the ability of deformation, which can provide the tolerance adaptation of the lead screw nut 5 in the radial direction of the lead screw 4; in the embodiment of the present invention, structures for adapting tolerances are provided between the lead screw nut 5, the lead screw nut mounting seat 6 and the screw rod 8. Therefore, in different usage scenarios, a series of problems affecting the operation of the device caused by tolerances of the above - mentioned accessories can be prevented.

[0027] Preferably, the second lead screw mounting seat 11 includes a base 12 fixedly connected to the lifting plate 1 and a second bearing 13 mounted on the base 12. The lead screw 4 is inserted into the inner ring of the second bearing 13 and axially fixed. An assembly hole for assembling the second bearing 13 is provided on the base 12. The outer ring of the second bearing 13 is engaged with the assembly hole to limit the swing of the lead screw 4, and the outer ring can axially move relative to the hole wall of the assembly hole.

[0028] In the embodiment of the present invention, the type of the second bearing 13 adopted by the second lead screw mounting seat 11 is a deep groove ball bearing. The deep groove ball bearing has an inner ring and an outer ring. The inner ring is inserted on the lead screw 4 and tightly abuts against the lead screw 4 to play a role in limiting the lead screw 4. A gap is left between the outer ring and the second lead screw mounting seat 11, and the outer ring can axially move on the hole wall. The lead screw 4 can slightly move through the cooperation between the outer ring and the hole wall. Reducing the generation of tolerances between different components can effectively prevent the superposition of tolerances. A snap ring is provided on the part of the lead screw 4 that abuts against the second bearing 13, and the snap ring can limit the second bearing 13 to prevent the second bearing 13 from coming out of the lead screw 4.

[0029] Preferably, a coupling 14 is provided between the lead screw 4 and the driver 3.

[0030] In the embodiment of the present invention, the coupling 14 can make the connection between the driver 3 and the lead screw 4 smoother.

[0031] Preferably, a height adjustment mechanism includes a lifting plate 1 and a fixing plate 2 mounted on the lifting plate 1. A driving component is mounted on the lifting plate 1 and the fixing plate 2, and the driving component is used for the lifting plate 1 to move on the fixing plate 2. The driving component includes the lead screw group mounting structure as described in any one of the above.

[0032] Preferably, a printing device includes a print head 16, a printing platform, and a height adjustment mechanism for adjusting the height of the print head. The height adjustment mechanism adopts the above-mentioned height adjustment mechanism.

[0033] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A screw rod group installation structure, characterized in that, It includes a driver and a lead screw installed on the output shaft of the driver; both ends of the lead screw are provided with a first lead screw mounting seat and a second lead screw mounting seat; the first lead screw mounting seat and the second lead screw mounting seat are both installed on the lifting plate; a lead screw nut is threadedly connected to the lead screw, and a lead screw nut mounting seat is fixedly connected to the fixed plate, and the lead screw nut is fixedly connected to the lead screw nut mounting seat. The driver drives the lifting plate to move axially along the lead screw through the cooperation of the lead screw, the lead screw nut, the first lead screw mounting seat and the second lead screw mounting seat; there is a gap between the lead screw nut and the lead screw nut mounting seat, and an elastic gasket is arranged in this gap, and the lead screw nut adjusts the axial position to adapt to the tolerance through the elastic gasket.

2. The installation structure of the lead screw group according to claim 1, characterized in that The lead screw nut and the lead screw nut mounting seat are connected by a screw. The lead screw nut is provided with a through hole for the screw to be inserted, and the lead screw nut mounting seat is provided with a threaded hole for the screw to be inserted.

3. The installation structure of the lead screw group according to claim 2, characterized in that, A screw limiting sleeve is sleeved on the screw. A limiting surface is arranged on the lead screw nut mounting seat corresponding to the position of the screw limiting sleeve; the screw limiting sleeve and the limiting surface cooperate with each other to limit the screw; the screw and the screw limiting sleeve also pass through the through hole and the elastic gasket.

4. The installation structure of the lead screw group according to any one of claims 1-3, characterized in that, The material of the elastic gasket is silicone or rubber.

5. The installation structure of the lead screw group according to claim 1, characterized in that, The lead screw nut mounting seat is provided with a mounting hole for mounting the lead screw nut, and at least a part of the lead screw nut is inserted into the mounting hole and has a gap with the inner wall of the mounting hole. At least a part of the elastic gasket also extends into this gap to allow the lead screw nut to adapt to the tolerance in the radial direction of the lead screw.

6. The installation structure of the lead screw group according to claim 1, wherein, The second lead screw mounting seat includes a base fixedly connected to the lifting plate and a second bearing installed on the base. The lead screw is inserted into the inner ring of the second bearing and axially fixed. The base is provided with an assembly hole for assembling the second bearing. The outer ring of the second bearing cooperates with the assembly hole to limit the swing of the lead screw, and the outer ring can move axially with the hole wall of the assembly hole.

7. The installation structure of the lead screw group according to claim 1, wherein A coupling is arranged between the lead screw and the driver.

8. A height adjustment mechanism, characterized in that, It includes a lifting plate and a fixed plate installed on the lifting plate. A driving component is installed on the lifting plate and the fixed plate. The driving component is used to move the fixed plate on the lifting plate. The driving component includes a lead screw group mounting structure as described in any one of claims 1-7.

9. A printing device, characterized in that, It includes a print head, a printing platform and a height adjustment mechanism for adjusting the height of the print head. This height adjustment mechanism adopts the height adjustment mechanism as described in claim 8.

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