Screw assembly installation structure, height adjustment mechanism and printing equipment

Abstract

The present invention discloses a screw assembly mounting structure, comprising a driver and a screw mounted on the output shaft of the driver; the two ends of the screw are provided with a first screw mounting seat and a second screw mounting seat; the first screw mounting seat and the second screw mounting seat are both mounted on the lifting plate; the screw is threadedly connected to a screw nut, and the fixing plate is fixedly connected to a screw nut mounting seat, and the screw nut is fixedly connected to the screw nut mounting seat, and the driver drives the lifting plate to move along the axial direction of the screw through the screw, the screw nut, the first screw mounting seat and the second screw mounting seat; a gap is left between the screw nut and the screw nut mounting seat, and an elastic gasket is provided in the gap, and the screw nut is adjusted to adapt to the tolerance of the axial position through the elastic gasket; the elastic gasket has the ability to deform, which can prevent different accessories from wearing and making abnormal noises during operation due to the superposition of tolerances, thereby causing jamming.

Description

Technical Field

[0001] The invention relates to printing equipment, in particular to a screw rod assembly installation structure, a height adjustment mechanism and printing equipment. Background Art

[0002] In the existing technology, the machine automatically adjusts the jet spacing according to the thickness of the medium before jet printing. This structure requires a lifting plate and a fixed plate. The two plates slide between each other through a slide rail, and the motor drives the lead screw to be responsible for lifting and lowering to ensure the printing height value; however, different problems will arise when different accessories are coordinated, such as the thickness tolerance problem of the lifting plate and the fixed plate, the coordination tolerance problem of the upper and lower lead screw mounting seats, and other related problems accumulate, resulting in the lead screw often getting stuck, making noise, and wearing in the process of driving the lifting plate. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a screw assembly installation structure, a height adjustment mechanism and a printing device, which can prevent different accessories from wearing and making abnormal noises during operation due to the superposition of tolerances, thereby preventing the occurrence of jamming.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a screw group mounting structure, comprising a driver and a screw mounted on the output shaft of the driver; the two ends of the screw are provided with a first screw mounting seat and a second screw mounting seat; the first screw mounting seat and the second screw mounting seat are both mounted on the lifting plate; a screw nut is threadedly connected to the screw, and a screw nut mounting seat is fixedly connected to the fixed plate, and the screw nut is fixedly connected to the screw nut mounting seat, and the driver drives the lifting plate to move along the axial direction of the screw through the screw, the screw nut, the first screw mounting seat and the second screw mounting seat; a gap is left between the screw nut and the screw nut mounting seat, and an elastic gasket is provided in the gap, and the screw nut adjusts the axial position adaptation tolerance through the elastic gasket.

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

[0006] As a further improvement of the present invention, a screw limiting sleeve is provided on the screw, and a limiting surface is provided on the 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 an elastic gasket.

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

[0008] As a further improvement of the present invention, a mounting hole for installing the screw nut is provided on the screw nut mounting seat, and at least a portion of the screw nut is passed through the mounting hole and has a gap with the inner wall of the mounting hole, and at least a portion of the elastic gasket extends into the gap to allow the screw nut to adapt to the tolerance in the radial direction of the screw.

[0009] As a further improvement of the present invention, the second screw mounting seat includes a base fixedly connected to the lifting plate and a second bearing mounted on the base. The screw is plugged 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 screw, and the outer ring and the hole wall of the assembly hole are axially movable.

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

[0011] As a further improvement of the present invention, a height adjustment mechanism includes a lifting plate and a fixed plate installed on the lifting plate, the lifting plate and the fixed plate are installed with a driving component, the driving component is used for the fixed plate to move on the lifting plate, and the driving component includes a screw group installation structure as any one of the above items.

[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, wherein the height adjustment mechanism adopts the above-mentioned height adjustment mechanism.

[0013] The beneficial effect of the present invention is that a gap is left between the screw nut and the screw nut mounting seat, and an elastic gasket is arranged in the gap. The elastic gasket has the ability to deform to help the screw nut adjust the axial position adaptation tolerance, thereby preventing different accessories from wearing and making abnormal noises during operation due to the superposition of tolerances, thereby causing jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of an embodiment of the present invention;

[0015] Figure 2 This is a right rear side view of an embodiment of the present invention;

[0016] Figure 3 This is a front right side view of an embodiment of the present invention;

[0017] Figure 4 This is a main sectional view of an embodiment of the present invention.

[0018] Figure numbers: 1. Lifting plate; 2. Fixed plate; 3. Driver; 4. Screw; 5. Screw nut; 6. Screw nut mounting seat; 7. Elastic gasket; 8. Screw; 9. Mounting hole; 10. First screw mounting seat; 11. Second screw mounting seat; 12. Base; 13. Second bearing; 14. Coupling; 15. Screw limit sleeve; 16. Print head. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] Reference Figure 1-4 As shown, a screw group installation structure includes a driver 3 and a screw 4 installed on the output shaft of the driver 3; the two ends of the screw 4 are provided with a first screw mounting seat 10 and a second screw mounting seat 11; the first screw mounting seat 10 and the second screw mounting seat 11 are both installed on the lifting plate 1; a screw nut 5 is threadedly connected to the screw 4, and a screw nut mounting seat 6 is fixedly connected to the fixed plate 2, and the screw nut 5 is fixedly connected to the screw nut mounting seat 6, and the driver 3 drives the lifting plate 1 to move axially along the screw 4 through the screw 4, the screw nut 5, the first screw mounting seat 10, and the second screw mounting seat 11; a gap is left between the screw nut 5 and the screw nut mounting seat 6, and an elastic gasket 7 is provided in the gap, and the screw nut 5 adjusts the axial position adaptation tolerance through the elastic gasket 7.

[0021] In the embodiment of the present invention, the driver 3 has a manual module and an automatic module to meet the needs of different scenarios; the first screw rod mounting seat 10 and the second screw rod mounting seat 11 at both ends of the screw rod 4 can make the screw rod 4 stable when rotating, and prevent the screw rod 4 from shaking when rotating; when the driver 3 is running, the driver 3 will drive the screw rod 4 to rotate, and the screw rod 4, the screw nut 5, the first screw rod mounting seat 10, and the second screw rod mounting seat 11 cooperate to drive the lifting plate 1 to move along the axial direction of the screw rod 4. The cooperation relationship between the various components is close, and the desired effect can be achieved; the lifting plate 1 and the fixed plate 2 are provided with mutually cooperating guide rails, which can make the lifting plate 1 move Smoother; there will be tolerances between the screw rod 4, the screw nut 5, and the screw nut mounting seat 6 during assembly, and the tolerances will be superimposed, so a gap is reserved in advance between the screw nut 5 and the 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 screw nut 5 adjusts the axial position to adapt to the tolerance through the elastic gasket 7; by the simple method of adding an elastic gasket 7 between the screw nut 5 and the screw nut mounting seat 6, the tolerance superposition problem between the above-mentioned accessories is solved, and it is prevented that different accessories will be worn and make abnormal noises during operation due to the tolerance superposition, thereby causing jamming.

[0022] Preferably, the screw nut 5 and the screw nut mounting seat 6 are connected by a screw 8. The screw nut 5 is provided with a through hole for inserting the screw 8, and the screw nut mounting seat 6 is provided with a screw hole for inserting the screw 8.

[0023] In an embodiment of the invention, the use of screw 8 can strengthen the connection between the screw nut 5 and the screw nut mounting seat 6, and the screw 8 can also adjust the tightness of the connection between the screw nut 5 and the screw nut mounting seat 6 to prevent excessive connection from causing damage to the screw nut 5 and the screw nut mounting seat 6.

[0024] Preferably, a screw limiting sleeve 15 is sleeved on the screw 8, and a limiting surface is set on the screw nut mounting seat 6 at the position corresponding to the screw limiting sleeve 15; the screw limiting sleeve 15 and the limiting surface cooperate with each other to limit the screw 8; the screw 8 and the screw limiting sleeve 15 also pass through the through hole and the elastic gasket 7.

[0025] In the embodiment of the present invention, the screw limiting sleeve 15 is disposed in the through hole, and one end of the screw limiting sleeve 15 abuts against the head of the screw 8, and the other end abuts against the limiting surface; when the screw 8 is inserted into the through hole, the screw limiting sleeve 15 limits the screw 8 and controls the insertion depth of the screw 8, thereby preventing the screw nut 5 from being locked in the screw nut mounting seat 6. At the same time, there is no gap, which can reduce problems such as jamming and abnormal noise generated during actual operation.

[0026] Preferably, the elastic gasket 7 is made of silicone or rubber.

[0027] In the embodiment of the present invention, the materials of rubber and silicone have the advantages of high elasticity, wear resistance, low cost, mature technology and aging resistance.

[0028] Preferably, a mounting hole 9 for installing the screw nut 5 is provided on the screw nut mounting seat 6, and at least a portion of the screw nut 5 is inserted into the mounting hole 9 and has a gap with the inner wall of the mounting hole 9. At least a portion of the elastic gasket 7 also extends into the gap to allow the screw nut 5 to adapt to the tolerance in the radial direction of the screw 4.

[0029] In an embodiment of the present invention, the screw nut 5 is inserted into the mounting hole 9 to strengthen the connection between the screw nut 5 and the screw nut mounting seat 6; a part of the elastic gasket 7 is also inserted into the gap; the screw nut 5, the screw nut mounting seat 6 and the elastic gasket 7 are tightly connected but with a gap, and the elastic gasket 7 has the ability to deform and can provide the screw nut 5 with a radial adaptation tolerance in the screw 4; in an embodiment of the present invention, an adaptation tolerance structure is provided between the screw nut 5, the screw nut mounting seat 6 and the screw 8, so in different usage scenarios, a series of problems affecting the operation of the device caused by the tolerance of the above-mentioned accessories can be prevented.

[0030] Preferably, the second 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 screw 4 is plugged into and axially fixed to the inner ring of the second bearing 13. An assembly hole for assembling the second bearing 13 is provided on the base 12. The outer ring of the second bearing 13 cooperates with the assembly hole to limit the swing of the screw 4, and the outer ring and the hole wall of the assembly hole can move axially.

[0031] In an embodiment of the present invention, the second bearing 13 used in the second 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 into the screw 4 and tightly abuts against the screw 4, which serves to limit the screw 4. A gap is left between the outer ring and the second screw mounting seat 11. The outer ring can move axially on the hole wall. The screw 4 can move slightly through the cooperation between the outer ring and the hole wall. Reducing the tolerance between different accessories can effectively prevent the superposition of tolerances; a retaining spring is provided on the part where the screw 4 abuts the second bearing 13, and the retaining spring can limit the second bearing 13 to prevent the second bearing 13 from falling off the screw 4.

[0032] Preferably, a coupling 14 is provided between the screw rod 4 and the driver 3 .

[0033] In the embodiment of the present invention, the coupling 14 can make the connection between the driver 3 and the screw rod 4 smoother.

[0034] Preferably, a height adjustment mechanism includes a lifting plate 1 and a fixed plate 2 installed on the lifting plate 1, and a driving component is installed on the lifting plate 1 and the fixed plate 2. The driving component is used to move the lifting plate 1 on the fixed plate 2, and the driving component includes a screw group installation structure as described in any one of the above items.

[0035] 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, and the height adjustment mechanism adopts the above-mentioned height adjustment mechanism.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A screw assembly installation structure, characterized in that: The cam is secured to the chassis and has a second locking mechanism, the second locking mechanism being secured to the chassis at the chassis's upper end and the lower end of the chassis at the lower end.

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

3. The screw assembly installation structure according to claim 2, characterized in that: The screw is covered with a screw limiting sleeve, and a limiting surface is provided on the 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 screw assembly installation structure according to any one of claims 1 to 3, characterized in that: The elastic gasket is made of silicone or rubber.

5. The screw rod assembly installation structure according to claim 1, characterized in that: The second screw mounting seat includes a base fixedly connected to the lifting plate and a second bearing mounted on the base. The screw is plugged 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 screw, and the outer ring and the hole wall of the assembly hole are axially movable.

6. The screw assembly installation structure according to claim 1, characterized in that: A coupling is provided between the screw rod and the driver.

7. A height adjustment mechanism, characterized in that: It includes a lifting plate and a fixed plate installed on the lifting plate, and a driving component is installed on the lifting plate and the fixed plate. The driving component is used for the fixed plate to move on the lifting plate. The driving component includes the screw group installation structure according to any one of claims 1-6.

8. A printing device, characterized in that: Includes print head, printing platform and for adjusting the print head height A height adjustment mechanism is provided, wherein the height adjustment mechanism is the height adjustment mechanism as claimed in claim 7.

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