CN217476588U - Leveling device and 3D printer - Google Patents

Abstract

The utility model discloses a levelling device and 3D printer mainly beats printer head and second and carries out the leveling respectively through setting up the determine module, guarantees that first printer head and second beat printer head effective spraying. The utility model discloses a main technical scheme does: a detection component; the first and second printhead assemblies are movable; the switching assembly is used for enabling one of the first printing head assembly and the second printing head assembly to be in a printing position by changing the positions of the first printing head assembly and the second printing head assembly, and the first printing head assembly or the second printing head assembly in the printing position is abutted to the detection assembly. The utility model discloses mainly used 3D printer leveling.

Description

Leveling device and 3D printer

Technical Field

The utility model relates to a 3D prints technical field, especially relates to a levelling device and 3D printer.

Background

In common hot melt lamination type 3D printer, the leading truck drives and beats printer head and descend to predetermineeing the position, and the nozzle is according to the cross sectional shape scanning formula of product to the spraying material of print platform selectivity, forms the first layer of printing the product after the material cooling, and the leading truck and then drive and beat printer head one deck that rises, carries out the printing on second floor on the basis of first layer, and the successive layer accumulation realizes three-dimensional printing. The precision degree of nozzle and the upper surface distance of print platform directly influences the precision of printing, however, print platform has certain flatness tolerance, receives factors such as temperature and live time moreover to influence, and print platform surface can have the deformation of different degrees.

In the prior art, a leveling component is arranged at a position close to a printing head, the surface profile of a platform is measured through the leveling component, and then the spraying height of a nozzle is adjusted according to the height difference between the nozzle and the leveling component and the measurement result of the platform profile, so that the distance from the nozzle to each point of the platform is consistent. However, when the nozzles are replaced, the height difference between the nozzles and the leveling component will change, and especially for a dual-nozzle 3D printer, the height difference between the two nozzles and the leveling component may not be consistent, and the spraying height cannot be adjusted for each nozzle, which may cause the nozzles to impact the printing platform, or cause the first layer of material to be unable to adhere to the printing platform due to the distance from the printing platform.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a levelling device and 3D printer mainly beats printer head and second and beats printer head and carry out the leveling respectively through setting up the determine module, guarantees that first printer head and second beat printer head effective spraying.

In order to achieve the above object, the utility model mainly provides the following technical scheme:

on the one hand, the embodiment of the utility model provides a levelling device is applied to the 3D printer, and the 3D printer includes print platform, and levelling device includes:

a detection component;

a first printhead assembly and a second printhead assembly, the first printhead assembly and the second printhead assembly being movable;

the switching assembly is used for enabling one of the first printing head assembly and the second printing head assembly to be in a printing position by changing the positions of the first printing head assembly and the second printing head assembly, and the first printing head assembly or the second printing head assembly in the printing position is abutted to the detection assembly.

Optionally, the detection assembly comprises a spring plate and a strain gauge;

the strain gauge is connected with the spring piece, and the strain gauge is close to the opening;

the first contact is used for abutting against the first printing head assembly, and when the first printing head assembly touches the printing platform, the first contact deforms so that the strain gauge generates a first feedback signal;

the second contact is used for being abutted to the second printing head assembly, and when the second printing head assembly touches the printing platform, the second contact deforms, so that the strain gauge generates a second feedback signal.

Optionally, the device further comprises a base, wherein the base is connected with the detection assembly and the switching assembly respectively; the first printing head assembly comprises a first spraying head assembly, a first telescopic assembly and a first elastic component, wherein the first end of the first telescopic assembly is connected with the first spraying head assembly, the second end of the first telescopic assembly is connected with the switching assembly, the first telescopic assembly is in sliding connection with the base, and the first elastic component is arranged between the base and the first spraying head assembly;

the second printing head assembly comprises a second spraying head assembly, a second telescopic assembly and a second elastic component, wherein the first end of the second telescopic assembly is connected with the second spraying head assembly, the second end of the second telescopic assembly is connected with the switching assembly, the second telescopic assembly is in sliding connection with the base, and the second elastic component is arranged between the base and the second spraying head assembly;

the first telescopic assembly is used for being abutted to the detection assembly when the first printing head assembly is located at a printing position, and the second telescopic assembly is used for being abutted to the detection assembly when the second printing head assembly is located at the printing position.

Optionally, the first telescopic assembly comprises a first bearing, the second telescopic assembly comprises a second bearing, and the first bearing and the second bearing are rotatable;

the switching component comprises a driving component and a sliding block, the sliding block comprises a supporting surface and a boss protruding out of the supporting surface, the driving component is connected with the sliding block to drive the sliding block to move, the sliding block is connected with the base in a sliding way,

the first telescopic assembly is connected with the sliding block in a rolling mode through a first bearing, the second telescopic assembly is connected with the sliding block in a rolling mode through a second bearing, one of the first bearing and the second bearing is located on the supporting surface, and the other one of the first bearing and the second bearing is located on the boss.

Optionally, the sliding block is provided with transmission teeth, and the switching assembly further comprises a gear;

the driving assembly is connected with the gear, the gear is meshed with the transmission gear, and the driving assembly is used for driving the gear to rotate so as to drive the sliding block to move under the moving action of the gear and the transmission gear.

Optionally, rolling inclined planes are arranged between the two sides of the boss in the moving direction of the slider and the supporting surface.

Optionally, the first telescopic assembly comprises a first sliding rod, a first clamping block and a first fixing screw, the first sliding rod is slidably connected to the base in a penetrating manner, a first end of the first sliding rod is connected with the first spray head assembly, a second end of the first sliding rod is connected to the first clamping block in a penetrating manner, and the first fixing screw is connected to the first clamping block in a penetrating manner and abutted to the first sliding rod;

the second telescopic assembly comprises a second sliding rod, a second clamping block and a second fixing screw, the second sliding rod is connected to the base in a sliding penetrating mode, the first end of the second sliding rod is connected with the second spray head assembly, the second end of the second sliding rod is connected to the second clamping block in a penetrating mode, and the second fixing screw is connected to the second clamping block in a penetrating mode and abutted to the second sliding rod;

the first fixing screw is used for fixing the first clamping block and the first sliding rod mutually, and when the first printing head assembly is positioned at a printing position, the first fixing screw is abutted against the detection assembly;

the second fixing screw is used for fixing the second clamping block and the second sliding rod mutually, and when the second printing head assembly is located at the printing position, the second fixing screw is abutted to the detection assembly.

Optionally, the base comprises an upper fixing seat, a lower fixing seat, a first fixing sleeve and a second fixing sleeve, the upper fixing seat is connected with the lower fixing seat, and the detection assembly is connected with the upper fixing seat;

a first cavity and a second cavity are formed in one end, close to the upper fixing seat, of the lower fixing seat, a first mounting hole and a second mounting hole are further formed in the lower fixing seat, the first mounting hole is communicated with the first cavity, the first fixing sleeve is fixedly connected with the first mounting hole in an inserting mode, the second mounting hole is communicated with the second cavity, and the second fixing sleeve is fixedly connected with the second mounting hole in an inserting mode;

the first sliding rod is used for driving the first clamping block to move in the first cavity through moving in the first fixing sleeve so as to enable the first fixing screw to be abutted against or separated from the first contact;

the second sliding rod is connected to the second fixing sleeve in a sliding penetrating mode, the second clamping block and the second fixing screw are located in the second cavity, and the second sliding rod is used for driving the second clamping block to move in the second cavity through moving in the second fixing sleeve so that the second fixing screw can be abutted to or separated from the second contact.

On the other hand, the embodiment of the utility model provides a still provides a 3D printer, including the levelling device of any one of the aforesaid.

Optionally, the 3D printer further comprises: the printing device comprises a guide assembly, a printing platform assembly and a printer base;

the guide assembly and the printing platform assembly are both connected with the printer base, and the leveling device is connected with the guide assembly;

the guide assembly is used for driving the leveling device to move so that the leveling device sequentially corresponds to a plurality of preset detection points on the printing platform assembly, and the leveling device is used for respectively carrying out leveling detection on the first printing head assembly and the second printing head assembly at the plurality of detection points.

The embodiment of the utility model provides a levelling device and 3D printer mainly carries out the leveling to first printer head and second and detects through setting up the determine module, guarantees that first printer head and second beat printer head effective spraying. In the prior art, after the nozzles are replaced, the height difference between the nozzles and the leveling component will be changed, and for a dual-nozzle 3D printer, the height difference between the two nozzles and the leveling component may not be consistent, so that the spraying height cannot be adjusted for each nozzle, which may result in failed spraying. Compared with the prior art, in the application document, the first printing head component and the second printing head component are alternatively abutted against the detection component through the switching component, so that the leveling detection of the first printing head component and the second printing head component is realized through the detection component, in the printing process, when the first printing head component is in a printing state, the height of the first printing head component is controlled according to the leveling detection result of the first printing head component, so that the nozzle of the first printing head component is in a consistent distance with the surface of the printing platform, when the second printing head component is in a printing state, the height of the second printing head component is controlled according to the leveling detection result of the second printing head component, so that the nozzle of the second printing head component is in a consistent distance with the surface of the printing platform, and the leveling detection and the leveling control of the first printing head component and the second printing head component are realized respectively, the problem of spraying failure caused by the fact that the first printing head assembly and the second printing head assembly have height difference is avoided.

Drawings

Fig. 1 is a schematic perspective view of a leveling device according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a leveling device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a leveling device at a first viewing angle according to an embodiment of the present invention;

fig. 4 is a schematic partial structural view of a leveling device at a second viewing angle according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a leveling device at a third viewing angle according to an embodiment of the present invention;

FIG. 6 is a schematic view of a portion of the leveling device shown in FIG. 5 in the area A;

fig. 7 is a schematic structural diagram of a leveling device at a fourth viewing angle according to an embodiment of the present invention;

FIG. 8 is a schematic view of a portion of the leveling device shown in FIG. 7 in the area B;

fig. 9 is a schematic partial perspective view of a leveling device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a sliding block of a leveling device according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a lower fixing seat, a first fixing sleeve and a second fixing sleeve of a leveling device according to an embodiment of the present invention;

fig. 12 is a schematic position diagram of a printing platform detection point of the 3D printer according to an embodiment of the present invention.

Detailed Description

To further illustrate the technical means and functions of the present invention for achieving the objectives of the present invention, the following detailed description will be given to the specific embodiments, structures, features and functions of a leveling device and a 3D printer according to the present invention with reference to the accompanying drawings and preferred embodiments.

On the one hand, as shown in fig. 1-11, the embodiment of the utility model provides a leveling device is applied to the 3D printer, and the 3D printer includes print platform, and leveling device includes:

a detection assembly 20;

first and second printhead assemblies 30, 40, the first and second printhead assemblies 30, 40 being movable;

the switching assembly 60, the first print head assembly 30 and the second print head assembly 40 are respectively connected with the switching assembly 60, the switching assembly 60 is used for enabling one of the first print head assembly 30 and the second print head assembly 40 to be in the printing position by changing the positions of the first print head assembly 30 and the second print head assembly 40, and the first print head assembly 30 or the second print head assembly 40 in the printing position is abutted to the detection assembly 20.

Wherein the first printhead assembly 30 and the second printhead assembly 40 are used alternately during printing, such as printing alternating print patterns of two different colors. When printing, when printing material of a first color needs to be sprayed, the first printing head assembly 30 is lowered to the printing position, the second printing head assembly 40 is raised to the non-printing position, the nozzle of the first printing head assembly 30 is lower than the nozzle of the second printing head assembly 40, the first printing head assembly 30 can spray printing material of the first color on the printing platform, when printing material of a second color needs to be sprayed, the second printing head assembly 40 is lowered to the printing position, the first printing head assembly 30 is raised to the non-printing position, the nozzle of the second printing head assembly 40 is lower than the nozzle of the first printing head assembly 30, the second printing head assembly 40 can spray printing material of the second color on the printing platform, and therefore printing of the color models on two sides is performed alternately. It is understood that the first printhead assembly 30 and the second printhead assembly 40 can also be used to print different materials.

The leveling detection is performed before printing, and is intended to acquire the actual height of the first printing head assembly 30 and the second printing head assembly 40 when acquiring the printing platform and the profile information of the printing platform, so that the 3D printer controls the heights of the first printing head assembly 30 and the second printing head assembly 40 when spraying the printing material according to the actual height and the profile information, and further, the first printing head assembly 30 and the second printing head assembly 40 are guaranteed to have the same preset distance with the printing platform all the time in the spraying process of each layer of model. If the first printing head assembly 30 is controlled to ascend at the convex part of the surface of the printing platform and descend at the concave part of the surface of the printing platform, the distance between the nozzle and the surface of the printing platform is always the same when the first printing head assembly 30 prints the same layer of model, and therefore the nozzle is prevented from impacting the printing platform and effective spraying of printing materials is guaranteed.

In the present embodiment, the first and second head assemblies 30 and 40 are movable, and when the leveling of the first head assembly 30 is detected, the switching assembly 60 lowers the first head assembly 30 to the printing position, and at this time, the first head assembly 30 abuts against the detection assembly 20. The 3D printer controls the leveling device to move downwards, when the first printing head assembly 30 touches the printing platform, the first printing head assembly 30 vibrates, the detection assembly 20 is further driven to generate form change, the size of a feedback signal generated by the detection assembly 20 is disturbed, and the position coordinate of the first printing head assembly 30 at the moment is recorded. Leveling detection is performed on a plurality of preset detection points of the printing platform, and as shown in fig. 12, the leveling detection is sequentially performed on 25 detection points uniformly distributed in the printing platform, so as to obtain height information of the first printhead assembly 30 and a surface profile of the printing platform.

When the leveling detection of the second printhead assembly 40 is performed, after the switching assembly 60 lowers the second printhead assembly 40 to the printing position, the leveling detection may be performed in any one of the following manners:

firstly, leveling detection of the second printing head assembly 40 is sequentially performed on 25 detection points uniformly distributed in the printing platform, and the specific operations are as follows: the 3D printer controls the leveling device to move downwards, when the second printing head assembly 40 touches the printing platform, the second printing head assembly 40 vibrates relatively, the size of a feedback signal of the detection assembly 20 is further disturbed, the position coordinate of the second printing head assembly 40 at the moment is recorded, and after the operations are completely executed on 25 detection points, the height information of the second printing head assembly 40 and the contour information of the printing platform are obtained.

Secondly, leveling detection is performed on the second print head assembly 40 aiming at any detection point in the 25 detection points, so as to obtain height information of the second print head assembly 40 aiming at the point, and according to the height information of the first print head assembly 30 aiming at the point, a height difference between the second print head assembly 40 and the first print head assembly 30 at the point is obtained, wherein the height difference is a mechanical height difference between the second print head assembly 40 and the first print head assembly 30, namely a height difference between a nozzle of the second print head assembly 40 at a printing position and a nozzle of the first print head assembly 30 at the printing position, which is caused by errors such as nozzle installation. According to the mechanical height difference between the second printing head assembly 40 and the first printing head assembly 30 and the surface profile of the printing platform obtained by leveling detection of the first printing head assembly 30, the height information of the second printing head assembly 40 at the rest 24 detection points on the printing platform can be obtained, and then all leveling detection results of the second printing head assembly 40 are obtained, so that the second printing head assembly 40 does not need to perform leveling detection on each leveling detection point, and the workload of the leveling detection process is greatly reduced. It will be appreciated that the mechanical height difference of the second printhead assembly 40 and the first printhead assembly 30 can be detected and stored in advance and not used every time for subsequent leveling.

The embodiment of the utility model provides a levelling device and 3D printer mainly carries out the leveling to first printer head and second and detects through setting up the determine module, guarantees that first printer head and second beat printer head effective spraying. In the prior art, after the nozzles are replaced, the height difference between the nozzles and the leveling component will be changed, and for a dual-nozzle 3D printer, the height difference between the two nozzles and the leveling component may not be consistent, so that the spraying height cannot be adjusted for each nozzle, which may result in failed spraying. Compared with the prior art, in the application document, the first printing head component and the second printing head component are alternatively abutted against the detection component through the switching component, so that the leveling detection of the first printing head component and the second printing head component is realized through the detection component, in the printing process, when the first printing head component is in a printing state, the height of the first printing head component is controlled according to the leveling detection result of the first printing head component, so that the nozzle of the first printing head component is in a consistent distance with the surface of the printing platform, when the second printing head component is in a printing state, the height of the second printing head component is controlled according to the leveling detection result of the second printing head component, so that the nozzle of the second printing head component is in a consistent distance with the surface of the printing platform, and the leveling detection and the leveling control of the first printing head component and the second printing head component are realized respectively, avoid the problem of failed spraying caused by the difference of the heights of the first printing head assembly and the second printing head assembly

The detecting assembly 20 may be in various forms, and may be configured to feed back vibrations of the first printhead assembly 30 and the second printhead assembly 40.

As shown in fig. 5-8, the sensing assembly 20 includes a spring plate 21 and a strain gauge 22. The spring piece 21 is of a plate-shaped structure, one end of the spring piece 21 is provided with a notch, the spring piece 21 on two sides of the notch is bent to form a first contact and a second contact, the strain gauge 22 is connected with the spring piece 21, and the strain gauge 22 is close to the notch. The first contact is adapted to abut against the first printhead assembly 30, and when the first printhead assembly 30 touches the printing platform, the first contact deforms, so that the strain gauge 22 generates the first feedback signal. The second contact is adapted to abut the second printhead assembly 40 and deform when the second printhead assembly 40 touches the print platform to cause the strain gauge 22 to generate a second feedback signal.

The spring plate 21 is made of a material with certain deformability, for example, the spring plate 21 is a copper plate or a steel plate. The spring piece 21 is vertically arranged, the lower end of the spring piece 21 is provided with an opening, so that the spring piece 21 is approximately in an inverted Y shape, two elongated elastic pieces capable of being stirred are formed on two sides of the opening at the lower end of the spring piece 21, the elongated elastic pieces extend in the vertical direction, and the tail ends of the elongated elastic pieces are bent into inclined first contacts and inclined second contacts towards the first printing head assembly 30 and the second printing head assembly 40. When the first printhead assembly 30 is in the non-printing position, the first printhead assembly 30 is located above the first contact, the first contact is suspended, when the first printhead assembly 30 is switched from the non-printing position to the printing position, the first printhead assembly 30 descends, the first printhead assembly 30 abuts against the first contact and drives the strip-shaped elastic sheet to bend in the direction away from the first printhead assembly 30 through the first contact, when the first printhead assembly 30 contacts the printing platform, the position of the first printhead assembly 30 vibrates, the bending form of the strip-shaped elastic sheet is disturbed, the area of the spring sheet 21 corresponding to the strain gauge 22 is driven to change in shape, and the strain gauge 22 captures the change in shape to generate the first feedback signal. The process of the second printhead assembly 40 touching the printing platform to generate the second feedback signal is the same as the process of the first printhead assembly 30, and is not repeated here.

It will be appreciated that the strain gauge 22 always sends a feedback signal to the master controller, and the first feedback signal and the second feedback signal refer to the feedback signal after the strain gauge 22 is changed. If the first printhead assembly 30 touches the printing platform, the shape of the strain gauge 22 is changed by the elongated elastic sheet, so that the resistance of the strain gauge 22 is changed, the feedback signal sent by the strain gauge 22 to the master controller is also changed, and the changed signal is the first feedback signal.

The arrangement realizes the leveling detection of the first printing head assembly 30 and the second printing head assembly 40 only by one spring piece 21 and one strain gauge 22, has simple structure, and can avoid detection errors caused by mechanical errors of different spring pieces 21.

Further, as shown in fig. 1 and 9, the leveling device further includes a base 10, and the base 10 is connected to the detection assembly 20 and the switching assembly 60, respectively.

The first printhead assembly 30 includes a first nozzle assembly 31, a first telescopic assembly 32 and a first elastic member 33, a first end of the first telescopic assembly 32 is connected to the first nozzle assembly 31, a second end of the first telescopic assembly 32 is connected to the switching assembly 60, the first telescopic assembly 32 is slidably connected to the base 10, and the first elastic member 33 is disposed between the base 10 and the first nozzle assembly 31.

The second printhead assembly 40 includes a second printhead assembly 41, a second telescopic assembly 42 and a second elastic member 44, a first end of the second telescopic assembly 42 is connected to the second printhead assembly 41, a second end of the second telescopic assembly 42 is connected to the switching assembly 60, the second telescopic assembly 42 is slidably connected to the base 10, and the second elastic member 44 is disposed between the base 10 and the second printhead assembly 41.

The first retraction assembly 32 is configured to abut the sensing assembly 20 when the first printhead assembly 30 is in the print position, and the second retraction assembly 42 is configured to abut the sensing assembly 20 when the second printhead assembly 40 is in the print position. The first elastic member 33 is configured to be elastically deformed when the first telescopic assembly 32 moves relative to the base 10 and provide an elastic force for the first telescopic assembly 32 to return to the printing position. The second elastic member 44 is used to elastically deform the second telescopic assembly 42 when moving relative to the base 10 and provide an elastic force for the second telescopic assembly 42 to return to the printing position.

The switching member 60 is configured to apply a pushing force to one of the first retracting member 32 and the second retracting member 42 to enable one of the first head member 31 and the second head member 41 to be in the non-printing position, and the first elastic member 33 is configured to apply an elastic force to the first retracting member 32 in a direction opposite to the pushing force, so that the first retracting member 32 returns to the printing position after the pushing force applied to the first retracting member 32 disappears. The first elastic member 33 is also used for deforming when the first printhead assembly 30 touches the printing platform, so that the first printhead assembly 30 pushes the detecting assembly 20 to deform to generate the first feedback signal.

The second elastic component 44 is used for applying an elastic force opposite to the thrust direction to the second telescopic component 42, so that after the thrust applied to the second telescopic component 42 disappears, the second telescopic component 42 returns to the printing position, and the second elastic component 43 is further used for deforming when the second print head assembly 40 touches the printing platform, so that the second print head assembly 40 pushes the detection component 20 to deform, so as to generate a second feedback signal.

The first elastic member 33 and the second elastic member 43 may be springs sleeved on the first telescopic assembly 32 and the second telescopic assembly 42.

The switching assembly 60 switches the states of the first printhead assembly 30 and the second printhead assembly 40 by pushing the first telescopic assembly 32 or the second telescopic assembly 42 to change the height of the first head assembly 31 or the second head assembly 41, and the specific implementation manner of the above-mentioned principle can be various, and one of them is taken as an example for description:

as shown in fig. 1, 9-10, first retraction assembly 32 includes a first bearing 34, second retraction assembly 42 includes a second bearing 44, and first bearing 34 and second bearing 44 are rotatable. The switching assembly 60 includes a driving assembly 61 and a slider 62, the slider 62 includes a supporting surface 621 and a boss 622 protruding from the supporting surface 621, the driving assembly 61 is connected to the slider 62 to drive the slider 62 to move, and the slider 62 is slidably connected to the base 10. First retraction assembly 32 is in rolling engagement with slider 62 via first bearing 34, and second retraction assembly 42 is in rolling engagement with slider 62 via second bearing 44. When one of the first bearing 34 and the second bearing 44 is located on the supporting surface 621, the other is located on the boss 622.

Drive assembly 61 is configured to drive movement of slider 62 to apply a pushing force to first bearing 34 to roll first bearing 34 onto boss 622 with second bearing 44 on support surface 621 with second printhead assembly 40 in the print position, or drive assembly 61 is configured to drive movement of slider 62 to apply a pushing force to second bearing 44 to roll second bearing 44 onto boss 622 with first bearing 34 on support surface 621 with first printhead assembly 30 in the print position.

The axial direction of first bearing 34 is perpendicular to the axial direction of first retraction assembly 32, the axial direction of second bearing 44 is perpendicular to the axial direction of second retraction assembly 42, both first bearing 34 and second bearing 44 roll in a vertical plane, and slider 62 moves horizontally. When the slide block 62 moves to a preset position towards one side of the first bearing 34, the first bearing 34 rolls to the higher boss 622, and drives the first telescopic assembly 32 and the first nozzle assembly 31 to move upwards, so that the first nozzle assembly 30 is switched from the printing position to the non-printing position; the second bearing 44 rolls to the outside of the boss 622, and due to the elastic action of the second elastic member 43, the second bearing 44 falls on the lower supporting surface 621, which drives the second expansion assembly 42 and the second head assembly 41 to move downward, so that the second head assembly 40 is switched from the non-printing position to the printing position.

As shown in fig. 9-10, the horizontal movement of the slide 62 is achieved as follows: the slide block 62 is provided with a gear 623, and the switching assembly 60 further comprises a gear 63. The driving assembly 61 is connected with a gear 63, the gear 63 is in engagement with the transmission teeth 623, and the driving assembly 61 is used for driving the gear 63 to rotate so as to drive the sliding block 62 to move through the moving action of the gear 63 and the transmission teeth 623.

The transmission gear 623 is a long-strip-shaped transmission gear which is arranged on the sliding block 62 and is opposite to one side of the base 10, the driving assembly 61 is a driving motor, the gear 63 is connected with a rotating shaft of the driving motor, and the driving motor realizes that the gear 63 drives the sliding block 62 to horizontally reciprocate through forward and reverse rotation.

Further, as shown in fig. 10, the boss 622 has rolling slopes 624 between both sides of the slider 62 in the moving direction and the supporting surface 621. The slider 62 is adapted to move to the first side so that the first bearing 34 rolls from the support surface 621 to the boss 622 via the rolling slope 624 and the second bearing 44 rolls from the boss 622 to the support surface 621 via the rolling slope 624. The slider 62 is also used to move to the second side, so that the second bearing 44 rolls from the supporting surface 621 to the boss 622 via the rolling slope 624, and the first bearing 34 rolls from the boss 622 to the supporting surface 621 via the rolling slope 624.

The connection between the rolling inclined plane 624 and the boss 622 and the support surface 621 adopts an arc transition, so that the connection between the rolling inclined plane 624 and the boss 622 and the support surface 621 is smooth, and the first bearing 34 and the second bearing 44 can smoothly roll to the boss 622. Still be provided with connecting hole 625 on the slider 62, connecting hole 625 is rectangular shape hole, adopts the bolt to pass through connecting hole 625 and fixes slider 62 on base 10 for slider 62's fixed position can horizontal adjustment, with the not use scene of adaptation.

In one embodiment, as shown in fig. 1 and 9, the first telescopic assembly 32 includes a first sliding rod 36, a first clamping block 37 and a first fixing screw 38, the first sliding rod 36 is slidably inserted into the base 10, a first end of the first sliding rod 36 is connected to the first nozzle assembly 31, a second end of the first sliding rod 36 is inserted into the first clamping block 37, and the first fixing screw 38 is inserted into the first clamping block 37 and abuts against the first sliding rod 36. The second telescopic assembly 42 includes a second sliding rod 46, a second clamping block 47 and a second fixing screw 48, the second sliding rod 46 is slidably connected to the base 10, a first end of the second sliding rod 46 is connected to the second nozzle assembly 41, a second end of the second sliding rod 46 is connected to the second clamping block 47, and the second fixing screw 48 is connected to the second clamping block 47 and abuts against the second sliding rod 46. The first fixing screw 38 is used to fix the first clamping block 37 and the first sliding rod 36 to each other, and when the first printing head assembly 30 is in the printing position, the first fixing screw 38 abuts against the detection assembly 20. The second fixing screw 48 is used to fix the second clamp block 47 and the second slide bar 46 to each other, and when the second printhead assembly 40 is in the printing position, the second fixing screw 48 abuts against the detection assembly 20.

The first sliding rod 36 is a round rod structure, the bottom end of the first sliding rod 36 is provided with threads for connecting with the first printing head 31, the first sliding rod 36 is slidably connected in the base 10 in a penetrating manner, the upper end of the first sliding rod 36 is connected with the first clamping block 37, the first bearing 34 is also connected with the first clamping block 37, and the first bearing and the first fixing screw 38 are located on two opposite sides of the first clamping block 37. Second retraction assembly 42 has the same structure as first retraction assembly 32. The first telescopic assembly 32 and the second telescopic assembly 42 which are separated realize convenient disassembly and assembly between the first telescopic assembly 32 and the second telescopic assembly 42 and the base 10, and realize partial storage of the first telescopic assembly 32 and the second telescopic assembly 42 in the base 10, thereby realizing the integral structure compactness and appearance simplicity of the detection device.

Specifically, in this embodiment, as shown in fig. 11, the base 10 includes an upper fixing seat 11, a lower fixing seat 12, a first fixing sleeve 13 and a second fixing sleeve 14, the upper fixing seat 11 and the lower fixing seat 12 are detachably connected by a bolt, and the detection assembly 20 is connected to the upper fixing seat 11. One end of the lower fixing seat 12, which is close to the upper fixing seat 11, is provided with a first cavity 15 and a second cavity 16, the lower fixing seat 12 is further provided with a first mounting hole and a second mounting hole, the first mounting hole is communicated with the first cavity 15, the first fixing sleeve 13 is fixedly connected with the first mounting hole in an inserting manner, the second mounting hole is communicated with the second cavity 16, and the second fixing sleeve 14 is fixedly connected with the second mounting hole in an inserting manner. The first contact and the second contact of the detection assembly 20 correspond to the openings of the first cavity and the second cavity, respectively, the first sliding rod 36 is slidably connected to the first fixing sleeve 13, the first clamping block 37 and the first fixing screw 38 are both located in the first cavity, and the first sliding rod 36 is configured to drive the first clamping block 37 to move in the first cavity by moving in the first fixing sleeve 13, so that the first fixing screw 38 abuts against or is separated from the first contact. The second sliding rod 46 is slidably inserted into the second fixing sleeve 14, the second clamping block 47 and the second fixing screw 48 are both located in the second cavity, and the second sliding rod 46 is configured to drive the second clamping block 47 to move in the second cavity by moving in the second fixing sleeve 14, so that the second fixing screw 48 abuts against or disengages from the second contact.

Wherein, first fixed sleeve 13 and second fixed sleeve 14 are components of a whole that can function independently structure with fixing base 12, and first fixed sleeve 13 and second fixed sleeve 14 adopt steel material to form through the fine processing, and the precision of first fixed sleeve 13 and second fixed sleeve 14 is high, guarantees that first slide bar 36 and second slide bar 46 can smoothly slide, realizes the displacement when accurate transmission first shower nozzle subassembly 31 and second shower nozzle subassembly 41 and print platform touched. The fixing seat 12 is made of aluminum, so that the weight of the fixing seat 12 and the manufacturing precision and difficulty of the fixing seat 12 can be reduced, and the production cost is reduced.

The first fixing screw 28 and the first clamping block 37 are accommodated in the first cavity, and the second fixing screw 48 and the second clamping block 47 are accommodated in the second cavity, so that the detection device has a simple structure, and the first printing head assembly 30 and the second printing head assembly 40 can be conveniently disassembled and assembled by the upper fixing seat 11 and the lower fixing seat 12 which are separated. The side walls of the first cavity 15 and the second cavity 16, which are opposite to one side of the sliding block 62, are respectively provided with a first notch 17 and a second notch 18, the first bearing 34 and the second bearing 44 are respectively connected with the first clamping block 37 and the second clamping block 47 through bearing connecting columns, the two bearing connecting columns are respectively arranged in the first notch 17 and the second notch 18, and when the first sliding rod 36 and the second sliding rod 46 slide, the two bearing connecting columns respectively move up and down in the first notch 17 and the second notch 18.

On the other hand, the embodiment of the utility model provides a still provides a 3D printer, including the levelling device of any one of the aforesaid, including the advantage of any one of the aforesaid levelling device, no longer describe here.

On the one hand, the embodiment of the utility model provides a levelling device is applied to the 3D printer, and the 3D printer includes print platform, and levelling device includes:

a detection assembly 20;

first and second printhead assemblies 30, 40, the first and second printhead assemblies 30, 40 being movable;

the switching assembly 60, the first print head assembly 30 and the second print head assembly 40 are respectively connected with the switching assembly 60, the switching assembly 60 is used for enabling one of the first print head assembly 30 and the second print head assembly 40 to be in the printing position by changing the positions of the first print head assembly 30 and the second print head assembly 40, and the first print head assembly 30 or the second print head assembly 40 in the printing position is abutted to the detection assembly 20.

Optionally, the detecting assembly 20 includes a spring plate 21 and a strain gauge 22;

the spring piece 21 is of a plate-shaped structure, one end of the spring piece 21 is provided with a notch, the spring piece 21 on two sides of the notch is bent to form a first contact and a second contact, the strain gauge 22 is connected with the spring piece 21, and the strain gauge 22 is close to the notch;

the first contact is used for abutting against the first printing head assembly 30, and when the first printing head assembly 30 touches the printing platform, the first contact deforms to enable the strain gauge 22 to generate a first feedback signal;

the second contact is adapted to abut the second printhead assembly 40 and deform when the second printhead assembly 40 touches the print platform, such that the strain gauge 22 generates a second feedback signal.

Optionally, the device further includes a base 10, and the base 10 is connected to the detection component 20 and the switching component 60 respectively; the first print head assembly 30 comprises a first nozzle assembly 31, a first telescopic assembly 32 and a first elastic component 33, wherein a first end of the first telescopic assembly 32 is connected with the first nozzle assembly 31, a second end of the first telescopic assembly 32 is connected with the switching assembly 60, the first telescopic assembly 32 is connected with the base 10 in a sliding manner, and the first elastic component 33 is arranged between the base 10 and the first nozzle assembly 31;

the second printhead assembly 40 includes a second printhead assembly 41, a second telescopic assembly 42 and a second elastic member 44, a first end of the second telescopic assembly 42 is connected to the second printhead assembly 41, a second end of the second telescopic assembly 42 is connected to the switching assembly 60, the second telescopic assembly 42 is slidably connected to the base 10, and the second elastic member 44 is disposed between the base 10 and the second printhead assembly 41;

the first retraction assembly 32 is configured to abut the sensing assembly 20 when the first printhead assembly 30 is in the print position, and the second retraction assembly 42 is configured to abut the sensing assembly 20 when the second printhead assembly 40 is in the print position.

Optionally, first retraction assembly 32 includes first bearing 34, second retraction assembly 42 includes second bearing 44, and first bearing 34 and second bearing 44 are rotatable;

the switching assembly 60 includes a driving assembly 61 and a slider 62, the slider 62 includes a supporting surface 621 and a boss 622 protruding from the supporting surface 621, the driving assembly 61 is connected with the slider 62 to drive the slider 62 to move, the slider 62 is slidably connected with the base 10,

the first telescopic assembly 32 is connected with the sliding block 62 in a rolling way through a first bearing 34, the second telescopic assembly 42 is connected with the sliding block 62 in a rolling way through a second bearing 44, and when one of the first bearing 34 and the second bearing 44 is positioned on the supporting surface 621, the other one is positioned on the boss 622.

Optionally, the sliding block 62 is provided with a transmission gear 623, and the switching assembly 60 further includes a gear 63;

the driving assembly 61 is connected with a gear 63, the gear 63 is in engagement with the transmission teeth 623, and the driving assembly 61 is used for driving the gear 63 to rotate so as to drive the sliding block 62 to move through the moving action of the gear 63 and the transmission teeth 623.

Optionally, the boss 622 is provided with rolling slopes 624 between the support surface 621 and both sides of the slider 62 in the moving direction.

Optionally, the first telescopic assembly 32 includes a first sliding rod 36, a first clamping block 37 and a first fixing screw 38, the first sliding rod 36 is slidably connected to the base 10, a first end of the first sliding rod 36 is connected to the first nozzle assembly 31, a second end of the first sliding rod 36 is connected to the first clamping block 37, and the first fixing screw 38 is connected to the first clamping block 37 and abuts against the first sliding rod 36;

the second telescopic assembly 42 comprises a second sliding rod 46, a second clamping block 47 and a second fixing screw 48, the second sliding rod 46 is slidably connected to the base 10, a first end of the second sliding rod 46 is connected with the second spray head assembly 41, a second end of the second sliding rod 46 is connected to the second clamping block 47 in a penetrating manner, and the second fixing screw 48 is connected to the second clamping block 47 in a penetrating manner and abutted against the second sliding rod 46;

the first fixing screw 38 is used for fixing the first clamping block 37 and the first sliding rod 36 to each other, and when the first printing head assembly 30 is in the printing position, the first fixing screw 38 abuts against the detection assembly 20;

the second fixing screw 48 is used to fix the second clamp block 47 and the second slide rod 46 to each other, and when the second printhead assembly 40 is in the printing position, the second fixing screw 48 abuts against the detection assembly 20.

Optionally, the base 10 includes an upper fixing seat 11, a lower fixing seat 12, a first fixing sleeve 13 and a second fixing sleeve 14, the upper fixing seat 11 is connected with the lower fixing seat 12, and the detection assembly 20 is connected with the upper fixing seat 11;

a first cavity 15 and a second cavity 16 are formed in one end, close to the upper fixing seat 11, of the lower fixing seat 12, a first mounting hole and a second mounting hole are further formed in the lower fixing seat 12, the first mounting hole is communicated with the first cavity 15, the first fixing sleeve 13 is fixedly connected with the first mounting hole in an inserting mode, the second mounting hole is communicated with the second cavity 16, and the second fixing sleeve 14 is fixedly connected with the second mounting hole in an inserting mode;

the first contact and the second contact of the detection assembly 20 correspond to the openings of the first cavity and the second cavity, respectively, the first sliding rod 36 is slidably connected to the first fixing sleeve 13, the first clamping block 37 and the first fixing screw 38 are both located in the first cavity, and the first sliding rod 36 is used for driving the first clamping block 37 to move in the first cavity by moving in the first fixing sleeve 13, so that the first fixing screw 38 is abutted to or separated from the first contact;

the second sliding rod 46 is slidably connected to the second fixing sleeve 14, the second clamping block 47 and the second fixing screw 48 are located in the second cavity, and the second sliding rod 46 is configured to drive the second clamping block 47 to move in the second cavity by moving in the second fixing sleeve 14, so that the second fixing screw 48 is abutted to or separated from the second contact.

On the other hand, the embodiment of the utility model provides a still provides a 3D printer, including the levelling device of any one of the aforesaid.

Optionally, the 3D printer further comprises: the printer comprises a guide assembly, a printing platform assembly and a printer base;

the guide assembly and the printing platform assembly are both connected with the printer base, and the leveling device is connected with the guide assembly;

the guiding assembly is used for driving the leveling device to move so that the leveling device sequentially corresponds to a plurality of preset detection points on the printing platform assembly, and the leveling device is used for respectively carrying out leveling detection on the first printing head assembly 30 and the second printing head assembly 40 at the plurality of detection points.

In one embodiment, the 3D printer further comprises a guide assembly, a print platform assembly, and a printer base. The guide assembly and the printing platform assembly are connected with the printer base, and the leveling device is connected with the guide assembly. The guiding assembly is used for driving the leveling device to move so that the leveling device sequentially corresponds to a plurality of preset detection points on the printing platform assembly, and the leveling device is used for respectively carrying out leveling detection on the first printing head assembly 30 and the second printing head assembly 40 according to the plurality of detection points.

The guide assembly comprises an X-axis guide assembly and a Y-axis guide assembly, the Y-axis guide assembly is erected on the printer base, the X-axis guide assembly is connected with the Y-axis guide assembly, the leveling device is connected with the X-axis guide assembly, the leveling device is erected on the printing platform assembly, the X-axis guide assembly moves up and down under the guide effect of the Y-axis guide assembly to control the leveling device to be at different heights, the leveling device moves on the X-axis guide assembly and the printing platform assembly moves relative to the printer base to enable the leveling device to correspond to a preset detection point on the printing platform assembly. Taking leveling detection of the first printhead assembly 30 as an example, in the detection process, the first printhead assembly 30 is switched to the printing position by the switching assembly 60, the leveling device drives the first printhead assembly 30 to move in the X-axis direction and the printing platform to move relative to the printer base, so that the first printhead assembly 30 corresponds to any one of the detection points, the X-axis guide assembly moves downward relative to the Y-axis guide assembly, further the first printhead assembly 30 is driven to move downward until the first printhead assembly 30 is driven to touch the printing platform, the height information of the leveling device at this time is recorded, and the above process is repeated to realize leveling detection of all the detection points.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a levelling device, its characterized in that is applied to the 3D printer, the 3D printer includes print platform, levelling device includes:

a detection component;

a first printhead assembly and a second printhead assembly, the first printhead assembly and the second printhead assembly being movable;

the first printing head assembly and the second printing head assembly are respectively connected with the switching assembly, the switching assembly is used for enabling one of the first printing head assembly and the second printing head assembly to be in a printing position by changing the positions of the first printing head assembly and the second printing head assembly, and the first printing head assembly or the second printing head assembly in the printing position is abutted to the detection assembly.

2. The leveling device of claim 1, wherein the sensing assembly comprises a spring plate and a strain gauge;

the spring piece is of a plate-shaped structure, one end of the spring piece is provided with a notch, the spring piece on two sides of the notch is bent to form a first contact and a second contact, the strain gauge is connected with the spring piece, and the strain gauge is close to the notch;

the first contact is used for abutting against the first printing head assembly, and when the first printing head assembly touches the printing platform, the first contact deforms to enable the strain gauge to generate a first feedback signal;

the second contact is used for being abutted to the second printing head assembly, and when the second printing head assembly is in contact with the printing platform, the second contact deforms, so that the strain gauge generates a second feedback signal.

3. The leveling device of claim 1, further comprising a base, wherein the base is connected to the detection assembly and the switching assembly respectively;

the first printing head assembly comprises a first spraying head assembly, a first telescopic assembly and a first elastic component, wherein the first end of the first telescopic assembly is connected with the first spraying head assembly, the second end of the first telescopic assembly is connected with the switching assembly, the first telescopic assembly is in sliding connection with the base, and the first elastic component is arranged between the base and the first spraying head assembly;

the second printing head assembly comprises a second spraying head assembly, a second telescopic assembly and a second elastic component, wherein the first end of the second telescopic assembly is connected with the second spraying head assembly, the second end of the second telescopic assembly is connected with the switching assembly, the second telescopic assembly is connected with the base in a sliding mode, and the second elastic component is arranged between the base and the second spraying head assembly;

the first telescopic assembly is used for abutting against the detection assembly when the first printing head assembly is located at the printing position, and the second telescopic assembly is used for abutting against the detection assembly when the second printing head assembly is located at the printing position.

4. Leveling device according to claim 3,

the first telescoping assembly comprises a first bearing and the second telescoping assembly comprises a second bearing, the first bearing and the second bearing being rotatable;

the switching assembly comprises a driving assembly and a sliding block, the sliding block comprises a supporting surface and a boss protruding out of the supporting surface, the driving assembly is connected with the sliding block to drive the sliding block to move, and the sliding block is connected with the base in a sliding mode;

the first telescopic assembly is in rolling connection with the sliding block through the first bearing, the second telescopic assembly is in rolling connection with the sliding block through the second bearing, one of the first bearing and the second bearing is located on the supporting surface, and the other one of the first bearing and the second bearing is located on the boss.

5. Leveling device according to claim 4,

the sliding block is provided with transmission teeth, and the switching assembly further comprises a gear;

the driving assembly is connected with the gear, the gear is meshed with the transmission teeth, and the driving assembly is used for driving the gear to rotate so as to drive the sliding block to move under the moving action of the gear and the transmission teeth.

6. Leveling device according to claim 4,

and rolling inclined planes are arranged between the two sides of the boss in the moving direction of the sliding block and the supporting surface.

7. Leveling device according to claim 3,

the first telescopic assembly comprises a first sliding rod, a first clamping block and a first fixing screw, the first sliding rod is connected to the base in a sliding mode in a penetrating mode, the first end of the first sliding rod is connected with the first spray head assembly, the second end of the first sliding rod is connected to the first clamping block in a penetrating mode, and the first fixing screw is connected to the first clamping block in a penetrating mode and abutted to the first sliding rod;

the second telescopic assembly comprises a second sliding rod, a second clamping block and a second fixing screw, the second sliding rod is connected to the base in a sliding and penetrating mode, the first end of the second sliding rod is connected with the second spray head assembly, the second end of the second sliding rod is connected to the second clamping block in a penetrating mode, and the second fixing screw is connected to the second clamping block in a penetrating mode and abutted to the second sliding rod;

the first fixing screw is used for fixing the first clamping block and the first sliding rod to each other, and when the first printing head assembly is in the printing position, the first fixing screw abuts against the detection assembly;

the second fixing screw is used for fixing the second clamping block and the second sliding rod to each other, and when the second printing head assembly is located at the printing position, the second fixing screw is abutted to the detection assembly.

8. Leveling device according to claim 7,

the base comprises an upper fixed seat, a lower fixed seat, a first fixed sleeve and a second fixed sleeve;

the upper fixing seat is connected with the lower fixing seat, a first cavity and a second cavity are formed in one end, close to the upper fixing seat, of the lower fixing seat, a first mounting hole and a second mounting hole are further formed in the lower fixing seat, the first mounting hole is communicated with the first cavity, the first fixing sleeve is fixedly inserted into the first mounting hole, the second mounting hole is communicated with the second cavity, and the second fixing sleeve is fixedly inserted into the second mounting hole;

the detection assembly is connected with the upper fixing seat, a first contact and a second contact of the detection assembly correspond to openings of the first cavity and the second cavity respectively, the first sliding rod is connected to the first fixing sleeve in a sliding mode in a penetrating mode, the first clamping block and the first fixing screw are located in the first cavity, and the first sliding rod is used for driving the first clamping block to move in the first cavity through moving in the first fixing sleeve so that the first fixing screw is abutted to or separated from the first contact;

the second sliding rod is in sliding connection with the second fixing sleeve, the second clamping block and the second fixing screw are both located in the second cavity, and the second sliding rod is used for driving the second clamping block to move in the second cavity through moving in the second fixing sleeve so that the second fixing screw is abutted to or separated from the second contact.

9. 3D printer characterized in that it comprises a levelling device according to any one of the preceding claims 1 to 8.

10. The 3D printer of claim 9, further comprising:

the printing device comprises a guide assembly, a printing platform assembly and a printer base;

the guide assembly and the printing platform assembly are both connected with the printer base, and the leveling device is connected with the guide assembly;

the guiding assembly is used for driving the leveling device to move so that the leveling device sequentially corresponds to a plurality of preset detection points on the printing platform assembly, and the leveling device is used for leveling and detecting the first printing head assembly and the second printing head assembly at a plurality of detection points respectively.

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