CN216658913U

CN216658913U - Z axle construction and 3D printer

Info

Publication number: CN216658913U
Application number: CN202122395792.5U
Authority: CN
Inventors: 陈春; 唐京科; 陈冠安
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-06-03
Anticipated expiration: 2031-09-30
Also published as: WO2023051016A1

Abstract

The utility model relates to the technical field of 3D printers, and particularly discloses a Z-axis structure and a 3D printer, wherein the Z-axis structure comprises a motor, a screw rod, a nut, a screw rod fixing piece and a limiting piece, an output shaft of the motor is in transmission connection with the screw rod, the nut is in threaded connection with the screw rod, the screw rod fixing piece is in clearance sleeve with the nut, the limiting piece can limit the screw rod fixing piece to rotate along the circumferential direction of the nut relative to the nut within a set range, when the motor and the screw rod are not concentric, the screw rod drives the nut to integrally rotate eccentrically relative to the output axis of the motor, through the clearance between the screw rod and the screw rod fixing piece, the clearance between the outer peripheral surface of the nut and the screw rod fixing piece allows the screw rod and the nut to integrally rock along the radial direction of the screw rod relative to the screw rod fixing piece to a certain degree, the screw rod fixing piece is prevented from moving along with the screw rod fixing piece, and the movement stability of a printing platform can be ensured, avoid printing the layer line that appears, reduce and print the noise, guarantee Z axle construction's life.

Description

Z axle construction and 3D printer

Technical Field

The utility model relates to the technical field of 3D printers, in particular to a Z-axis structure and a 3D printer.

Background

The field that 3D printing technique was used is more and more wide under the intelligent promotion of computer digital technology, receives DIY fan's favor more and more, and 3D prints the quality of printing closely inseparable with Z axle construction, and a good Z axle construction can guarantee that the model surface that prints is smooth no lamination, and the noiselessness that operates steadily can also improve the life of Z axle construction.

The Z axle construction of photocuring 3D printer among the prior art includes the motor usually, with the lead screw that motor drive is connected to and set up in the nut of lead screw, the cantilever is connected through the connecting piece to the nut, drives through the cantilever and prints the platform and remove along the Z axle. Nut and connecting piece usually pass through bolt fixed connection, when there is the decentraction problem between motor and the lead screw, will lead to printing the striation that appears to the noise is serious, influences the life of Z axle construction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the utility model provides a Z axle construction and 3D printer to when decentraction between the motor of Z axle construction and the lead screw among the solution correlation technique, can lead to printing the layer line that appears, and the noise is serious, influences Z axle construction's life's problem.

In one aspect, the present invention provides a Z-axis structure comprising:

a motor;

the screw rod is in transmission connection with an output shaft of the motor;

the nut is screwed on the screw rod;

the screw rod fixing piece is sleeved on the screw rod in a clearance mode, the screw rod fixing piece is sleeved on the nut in a sleeved mode, and a first clearance is formed between the screw rod fixing piece and the outer peripheral face of the nut;

and the limiting part is used for limiting the screw rod fixing part to rotate relative to the nut along the circumferential direction of the nut within a set range.

As a preferred technical scheme of the Z-axis structure, the nut comprises a nut body in threaded connection with the lead screw and a connecting part convexly arranged on the nut body, and the lead screw is arranged in the nut body in a penetrating manner;

the lead screw fixing part is provided with an accommodating groove, the connecting part is located in the accommodating groove, and the first gap is located between the outer peripheral surface of the connecting part and the groove wall of the accommodating groove.

As a preferable technical scheme of the Z-axis structure, the Z-axis structure further includes a cantilever fixedly connected to the lead screw fixing member, the cantilever is provided with a through hole, the nut body is inserted into the through hole, a second gap is formed between an outer peripheral surface of the nut body and a sidewall of the through hole, and the connecting portion abuts against the cantilever along an axial direction of the lead screw.

As the preferable technical scheme of the Z-axis structure, the Z-axis structure further comprises a sliding assembly, the sliding assembly comprises a guide rail and a sliding table arranged on the guide rail in a sliding mode, and the cantilever is connected with the sliding table.

As a preferred technical solution of the Z-axis structure, the limiting member includes a rod portion and a head portion connected to the rod portion, the head portion abuts against the lead screw fixing member, the rod portion sequentially penetrates through the lead screw fixing member and the connecting portion and is in threaded connection with the cantilever, and the rod portion is in clearance fit with the connecting portion.

As a preferable technical solution of the Z-axis structure, the Z-axis structure further includes an elastic member, and the lead screw fixing member and the nut have a third gap in an axial direction along the lead screw;

the elastic piece is located in the third gap and is respectively abutted to the screw rod fixing piece and the nut along the axial direction of the screw rod.

As a preferable technical scheme of the Z-axis structure, the elastic piece is an elastic pad.

As a preferable technical scheme of the Z-axis structure, the first gap is 1mm-3 mm.

As the preferable technical scheme of the Z-axis structure, the Z-axis structure further comprises a bracket and at least one positioning pin, and the positioning pin is in pin joint with the motor and the bracket.

In another aspect, the present invention provides a D printer, including the Z-axis structure in any one of the above aspects.

The utility model has the beneficial effects that:

the utility model provides a Z-axis structure and a 3D printer. Wherein, the output shaft of motor is connected with the lead screw transmission. The nut is in threaded connection with the screw rod, the screw rod fixing piece is sleeved on the screw rod in a clearance mode, the screw rod fixing piece is sleeved on the nut in a sleeved mode, a first clearance is formed between the screw rod fixing piece and the outer peripheral face of the nut, the limiting piece can limit the screw rod fixing piece to rotate relative to the nut in the circumferential direction of the nut within a set range, when the motor and the screw rod are not concentric, the screw rod drives the nut to rotate eccentrically relative to the axis of the output shaft of the motor, the clearance between the screw rod and the screw rod fixing piece and the clearance between the outer peripheral surface of the nut and the screw rod fixing piece allow the screw rod and the nut to integrally rock along the radial direction of the screw rod to a certain degree relative to the screw rod fixing piece, so as to avoid the eccentric motion of the screw rod fixing piece along with the screw rod, thereby guarantee print platform motion's stability, can avoid printing the lamination line that appears, reduce the noise that prints the production to can guarantee the life of Z axle construction.

Drawings

FIG. 1 is a schematic structural diagram of a Z-axis structure in an embodiment of the present invention;

FIG. 2 is a sectional view showing a partial structure of a Z-axis structure in an embodiment of the utility model;

FIG. 3 is an exploded view of a Z-axis structure in an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 2;

FIG. 5 is a first schematic structural diagram of a 3D printer according to an embodiment of the present invention;

FIG. 6 is a second schematic structural diagram of a 3D printer according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram three of the 3D printer in the embodiment of the present invention.

In the figure:

1. a support;

2. a motor;

3. a screw rod;

4. a nut; 41. a nut body; 42. a connecting portion;

5. a screw rod fixing part; 51. accommodating grooves;

6. an elastic member;

7. a limiting member; 71. a head portion; 72. a rod portion;

8. a cantilever; 81. a through hole;

9. positioning pins;

10. a sliding assembly; 101. a guide rail; 102. a sliding table;

20. a connecting bolt;

30. a coupling;

100. a base; 200. a housing; 300. a printing platform; 301. a connecting assembly; 3011. a sleeve; 3012. A locking member; 3013. a connecting frame; 302. a platform body; 400. a frame body; 500. an accommodating cavity.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

This embodiment provides a Z axle construction, and this Z axle construction specifically is applied to the 3D printer, and Z axle construction is used for driving the printing platform of 3D printer and removes along vertical direction, and wherein, the preferred photocuring 3D printer that is of 3D printer.

Specifically, as shown in fig. 1 to 4, the Z-axis structure includes a motor 2, a lead screw 3, a nut 4, a lead screw fixing member 5, and a limiting member 7. Wherein, the output shaft of the motor 2 is in transmission connection with the screw rod 3. The nut 4 is screwed to the lead screw 3, the lead screw fixing member 5 is sleeved on the lead screw 3 with a gap, the lead screw fixing member 5 is sleeved on the nut 4, a first gap (the first gap is shown as G1 in fig. 4) is formed between the outer peripheral surfaces of the lead screw fixing member 5 and the nut 4, the lead screw fixing member 5 is specifically used for being directly or indirectly connected with the printing platform, and the printing platform is driven by the lead screw fixing member 5 to reciprocate along the lead screw 3, and the limiting member 7 can limit the lead screw fixing member 5 to rotate relative to the nut 4 along the circumferential direction of the nut 4 within a set range, wherein the set range can be understood as that the limiting member 7 can allow the nut 4 to freely rotate relative to the lead screw fixing member 5 within the set range, but after the set range is exceeded, the nut 4 and the lead screw fixing member 5 can keep transmission synchronization under the action of the limiting member 7. For example, the value of the set range may be within 1 °.

The Z axle construction that this embodiment provided, when the condition of

motor

2 and 3 decentractions of lead screw appears, lead screw 3 drives the whole axle center eccentric rotation with relative motor 2's output shaft of nut 4, clearance between accessible lead screw 3 and the lead screw mounting 5, clearance between the outer peripheral face of nut 4 and the lead screw mounting 5 allows lead screw 3 and the whole relative lead screw mounting 5 of nut 4 to rock along lead screw 3's radial at a certain degree, avoid lead screw mounting 5 follow-up, thereby guarantee the stability of print platform motion, can avoid printing the lamination, reduce the noise that prints the production, and can guarantee the life of Z axle construction.

In this embodiment, the output shaft of the motor 2 is in transmission connection with the screw rod 3 through the coupler 30, so that the problem of non-concentricity between the motor 2 and the screw rod 3 can be prevented. In other embodiments, the output shaft of the motor 2 can also be in transmission connection with the screw rod 3 through a speed reducing mechanism.

Optionally, the Z-axis structure further includes a bracket 1 and a plurality of positioning pins 9, and the positioning pins 9 are respectively pinned to the motor 2 and the bracket 1. Can effectively guarantee the relative position stability of motor 2 and support 1 through setting up locating pin 9, be convenient for improve the packaging efficiency.

Optionally, the Z-axis structure includes a plurality of limiting members 7, and the plurality of limiting members 7 are uniformly distributed along the circumferential direction of the lead screw 3. So set up can guarantee nut 4 and lead screw mounting 5 along the stability of the transmission of power in the 4 circumferencial direction of nut.

Optionally, the nut 4 comprises a nut body 41 in threaded connection with the lead screw 3 and a connecting part 42 convexly provided with the nut body 41, and the lead screw 3 is arranged through the nut body 41; the screw fixing part 5 is provided with a receiving groove 51, the connecting part 42 is positioned in the receiving groove 51, and the first gap is specifically positioned between the outer peripheral surface of the connecting part 42 and the groove wall of the receiving groove 51. Preferably, in this embodiment, the connecting portion 42 is a waist shape, and the accommodating groove 51 is also a waist shape, so that when the screw rod 3 drives the nut 4 to rotate, the nut 4 can selectively transmit force between the limiting member 7 and the screw rod fixing member 5 or transmit force by abutting the connecting portion 42 against the groove wall of the limiting groove along the circumferential direction of the nut 4.

In this embodiment, the first gap is 1mm to 3 mm. Illustratively, the first gap is 1 mm.

Optionally, the Z-axis structure further includes a cantilever 8 fixedly connected to the lead screw fixing member 5, the cantilever 8 is slidably connected to the bracket 1, and the cantilever 8 is used for being connected to the printing platform. Alternatively, the cantilever 8 is provided with a through hole 81, the nut body 41 is inserted into the through hole 81, and a second gap is formed between the outer circumferential surface of the nut body 41 and the sidewall of the through hole 81 (the second gap is shown as G2 in fig. 4). Through setting up the second clearance to when guaranteeing that motor 2 and lead screw 3 are eccentric, the whole of lead screw 3 and nut 4 can rock relatively lead screw mounting 5 and cantilever 8 whole relatively.

Optionally, the Z-axis structure further includes an elastic member 6, and the screw holder 5 and the nut 4 have a third gap in the axial direction of the screw 3 (the third gap is shown as G3 in fig. 4); the elastic element 6 is located in the third gap, and the elastic element 6 abuts against the screw rod fixing element 5 and the nut 4 along the axial direction of the screw rod 3. Through setting up elastic component 6, at the in-process when the return stroke of lead screw 3, in the twinkling of an eye when lead screw 3 stall, the inertia that printing platform finally acted on lead screw 3 is buffered to accessible elastic component 6, guarantees the accurate return stroke of lead screw 3, and simultaneously, the first clearance of third clearance fit also can allow lead screw 3 and nut 4 whole relative lead screw mounting 5 to rock. In this embodiment, the elastic member 6 is an elastic pad, the elastic pad is disposed on the screw rod 3, and the elastic pad can be made of rubber, felt, or the like. In other embodiments, the elastic pad may be replaced by a compression spring, and the plurality of compression springs are uniformly distributed along the circumferential direction of the screw rod 3.

Optionally, the elastic component 6 is located the holding tank 51, and in this embodiment, the lead screw 3 is arranged along the vertical direction, and the notch of the holding tank 51 is downward, so that the elastic component 6 is wholly limited in the holding tank 51, and the direction stability of the elastic force of the elastic component 6 is ensured. In addition, in this embodiment, the inner diameter of the through hole 81 of the cantilever 8 is smaller than the outer diameter of the connecting portion 42, the connecting portion 42 can be supported and limited through the lower portion, the lower end of the elastic member 6 can be supported and limited through the connecting portion 42, the groove bottom of the accommodating groove 51 is limited to the upper end of the elastic member 6, and the position stability of the elastic member 6 can be ensured.

Optionally, the limiting member 7 includes a rod portion 72 and a head portion 71 connected to the rod portion 72, the head portion 71 abuts against the lead screw fixing member 5, the rod portion 72 sequentially passes through the lead screw fixing member 5 and the connecting portion 42 and is in threaded connection with the cantilever 8, and the rod portion 72 is in clearance fit with the connecting portion 42. The distance between the screw rod fixing piece 5 and the cantilever 8 can be adjusted by screwing the bolt, and the connecting part 42 is abutted against the cantilever 8, so that the distance between the screw rod fixing piece 5 and the connecting part 42 can be adjusted, the compression amount of the elastic piece 6 can be adjusted, and the relative shaking amplitude of the nut 4 and the screw rod 3 fixing piece can be adjusted. Preferably, in order to ensure the stability of the connection between the screw holder 5 and the cantilever 8, in this embodiment, the screw holder 5 and the cantilever 8 are also connected by a connecting bolt 20.

Optionally, the Z-axis structure further includes a sliding assembly 10, the sliding assembly 10 includes a guide rail 101, and a sliding table 102 slidably disposed on the guide rail 101, the guide rail 101 is configured to be fixed to the bracket 1, and the cantilever 8 is connected to the sliding table 102. In other embodiments, the sliding assembly 10 may be replaced by a light bar and a slider slidably disposed on the light bar, the slider being coupled to the suspension 8.

As shown in fig. 5 to 7, this embodiment also provides a 3D printer, and this 3D printer is the photocuring 3D printer, of course, also can be other types of printer. The 3D printer comprises the Z-axis structure in the scheme. The 3D printer still includes print platform 300, base 100 and sets up in base 100's shell 200, and Z axle construction's support 1 is fixed to be set up in base 100, and is located in shell 200 by the cover, and Z axle construction passes through cantilever 8 and drives print platform 300 and goes up and down along vertical direction.

Optionally, the printing platform 300 includes a main body 302, and a connecting component 301 connecting the main body 302 and the cantilever 8. The connection assembly 301 includes a sleeve 3011 sleeved on the suspension arm 8, a locking member 3012 passing through the sleeve 3011 and screwed to the suspension arm 8, and a connection frame 3013 connecting the sleeve 3011 and the platform body 302. When the motor 2 drives the screw rod 3 to rotate, the nut 4 drives the screw rod fixing part 5 and the cantilever 8 to lift along the vertical direction, and then the cantilever 8 drives the platform body 302 to lift along the vertical direction through the connecting component 301.

Optionally, the 3D printer further includes a frame 400 disposed on the base 100, the frame 400 and the base 100 enclose an accommodating cavity 500 with an upward opening, and the printing platform 300 can print in the accommodating cavity 500.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A Z-axis structure, comprising:

a motor (2);

the screw rod (3) is in transmission connection with an output shaft of the motor (2);

a nut (4) screwed to the lead screw (3);

the screw rod fixing piece (5) is sleeved on the screw rod (3) in a clearance mode, the screw rod fixing piece (5) is sleeved on the nut (4), and a first clearance is formed between the screw rod fixing piece (5) and the outer peripheral face of the nut (4);

the limiting piece (7) is used for limiting the screw rod fixing piece (5) to rotate relative to the nut (4) in the circumferential direction of the nut (4) within a set range.

2. The Z-axis structure according to claim 1, wherein the nut (4) includes a nut body (41) screwed with the lead screw (3) and a connecting portion (42) protruding from the nut body (41), the lead screw (3) being inserted into the nut body (41);

the screw rod fixing piece (5) is provided with an accommodating groove (51), the connecting portion (42) is located in the accommodating groove (51), and the first gap is located between the outer peripheral surface of the connecting portion (42) and the groove wall of the accommodating groove (51).

3. The Z-axis structure according to claim 2, further comprising a cantilever (8) fixedly connected with the lead screw fixing member (5), wherein the cantilever (8) is provided with a through hole (81), the nut body (41) is inserted into the through hole (81), a second gap is formed between the outer peripheral surface of the nut body (41) and the side wall of the through hole (81), and the connecting portion (42) abuts against the cantilever (8) along the axial direction of the lead screw (3).

4. The Z-axis structure according to claim 3, further comprising a sliding assembly (10), wherein the sliding assembly (10) comprises a guide rail (101) and a sliding table (102) arranged on the guide rail (101) in a sliding manner, and the cantilever (8) is connected with the sliding table (102).

5. The Z-axis structure according to claim 3, wherein the limiting member (7) comprises a rod portion (72) and a head portion (71) connected to the rod portion (72), the head portion (71) abuts against the lead screw fixing member (5), the rod portion (72) sequentially passes through the lead screw fixing member (5) and the connecting portion (42) and is in threaded connection with the cantilever (8), and the rod portion (72) is in clearance fit with the connecting portion (42).

6. The Z-axis structure according to claim 2, further comprising an elastic member (6), wherein the lead screw fixing member (5) and the nut (4) have a third clearance in an axial direction of the lead screw (3);

the elastic piece (6) is located in the third gap, and the elastic piece (6) abuts against the screw rod fixing piece (5) and the nut (4) along the axial direction of the screw rod (3) respectively.

7. The Z-axis structure according to claim 6, characterized in that the elastic member (6) is an elastic pad.

8. The Z-axis structure of claim 2, wherein the first gap is 1mm to 3 mm.

9. The Z-axis structure according to any one of claims 1 to 8, characterized in that the Z-axis structure further comprises a bracket (1) and at least one positioning pin (9), the positioning pin (9) being pinned to the motor (2) and the bracket (1).

10. A 3D printer comprising the Z-axis structure of any one of claims 1 to 9.