Decoupling mechanism, gantry structure and 3D printer

Abstract

The utility model provides a decoupling mechanism, a gantry structure and a 3D printer, and the decoupling mechanism comprises a Y-direction sliding block arranged at one axial end of a cross beam; the moving seat is slidably arranged on the sliding rail in the length direction of the sliding rail; sliding grooves are formed in the moving seats in the Y direction in a penetrating mode, and the Y-direction sliding blocks are embedded into the sliding grooves and are in sliding fit with the corresponding moving seats in the Y direction. And the flexible unit is detachably connected with the Y-direction sliding block and the moving base in the Y direction and arranged at the end, away from the cross beam, of the moving base, and the flexible unit has elasticity in the Y direction so that deformation of the cross beam in the Y direction can be absorbed after the cross beam is heated and expanded. The elastic deformation of the flexible unit is used for absorbing the deformation of the cross beam in the Y direction, the side pressure of the cross beam on the sliding rail seat after thermal expansion deformation and stress concentration generated at specific positions at the two ends of the cross beam are reduced, the overall strength of the corresponding gantry structure is guaranteed, the service life of the gantry structure is prolonged, and meanwhile the movement precision of the corresponding printing head is improved. And the corresponding 3D printing quality is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of printing equipment production, and further to a decoupling mechanism, a gantry structure and a 3D printer. Background Art

[0002] The gantry structure assists the print head in XY motion in 3D printing equipment. During use, its upper beam is exposed to the high-temperature chamber, causing thermal expansion and deformation. In large-scale 3D printers, the thermal expansion problem is particularly prominent due to the larger span of the beam.

[0003] At present, the ends of the upper beams of 3D printing equipment on the market are generally connected to the corresponding moving seats by direct fastening. However, with this connection method, the crossbeam expands and deforms due to heat, which not only generates lateral pressure on the corresponding slide rail seat, increasing the movement resistance of the corresponding moving seat and aggravating the wear of the corresponding slide rail, but also causes excessive concentration of stress at the fixed positions at both ends of the crossbeam, thereby reducing the overall strength of the corresponding gantry structure and shortening its service life. In addition, it also reduces the movement accuracy of the print head, affecting the printing quality, and there is room for improvement. Utility Model Content

[0004] The purpose of this application is to provide a decoupling mechanism, a gantry structure and a 3D printer, so as to reduce the lateral pressure of the beam on the corresponding slide rail seat after the beam expands due to heat as much as possible, improve the overall strength of the corresponding gantry structure, extend its service life, and improve the movement accuracy of the corresponding print head on the beam, thereby ensuring printing quality.

[0005] The technical solutions provided in this application are as follows:

[0006] The present application provides a decoupling mechanism, which is applied between a crossbeam and a slide rail of a gantry structure of a 3D printer, comprising:

[0007] A Y-direction slider, provided at one axial end of the beam;

[0008] A movable seat is slidably arranged on the slide rail along the length direction of the slide rail; a slide groove is formed on the movable seat along the Y direction, and the Y-direction slider is embedded in the slide groove and slides with the corresponding movable seat along the Y direction;

[0009] The flexible unit is detachably connected to the Y-direction slider and the movable seat along the Y-direction and is arranged at one end of the movable seat away from the beam. The flexible unit is elastic along the Y-direction so as to absorb the deformation of the beam along the Y-direction after the beam expands due to heat.

[0010] Through a decoupling mechanism provided by the present application, since after the crossbeam expands due to heat, its deformation in the Y direction has a major impact on the structural strength of the corresponding gantry structure and the movement accuracy of the print head. Therefore, by means of the sliding fit of the Y-direction slider and the chute in the Y direction and the flexible unit, the Y-direction slider and the moving seat are flexibly connected in the Y direction. When the crossbeam expands due to heat, the Y-direction slider slides relative to the moving seat in the Y direction, pushing the flexible unit to elastically deform in the Y direction. The elastic deformation of the flexible unit is used to absorb the deformation of the crossbeam in the Y direction, effectively reducing the lateral pressure on the slide rail seat after the crossbeam expands due to heat, and at the same time reducing the stress concentration at specific positions at both ends of the crossbeam, thereby effectively ensuring the overall strength of the corresponding gantry structure and extending its service life. Moreover, since the moving seat can move normally, the movement accuracy of the corresponding print head is also effectively improved, thereby ensuring the printing quality of the corresponding model.

[0011] In some embodiments, the flexible unit includes a spring piece;

[0012] The spring piece is parallelly abutted against the side of the Y-direction slider and the moving seat facing away from the crossbeam, and is detachably connected to the moving seat in the Y direction.

[0013] Through a decoupling mechanism provided by the present application, the elastic connection between the Y-direction slider and the moving seat in the Y direction is realized by means of the spring piece. The flexible unit has a simple structure, is convenient for production and use, and helps to reduce the corresponding production and use costs.

[0014] In some embodiments, a convex block is formed on the moving seat, and one convex block is provided at the middle position of the two side walls of the chute in the Y direction;

[0015] The side walls of the Y-direction slider corresponding to the two sides in the Y direction are respectively parallelly abutted against the corresponding convex blocks and are slidably mated with the corresponding convex blocks in the Y direction.

[0016] Through a decoupling mechanism provided by the present application, convex blocks are respectively formed on the two side walls of the chute, so that the two sides of the Y-direction slider corresponding to its own sliding direction are slidably mated with the corresponding convex blocks. On the one hand, while ensuring the fitting accuracy between the Y-direction slider and the chute and the precise guiding of the Y-direction slider, the production difficulty of the inner wall of the chute is effectively reduced; on the other hand, the convex blocks are formed in the middle of the chute, so that there is a swinging space margin in the X direction in the Y direction, which helps to reduce the probability of the crossbeam shaking in the X direction during movement, the movement of its two ends being asynchronous and getting stuck, and effectively improves the stability of the sliding movement of the crossbeam.

[0017] In some embodiments, a Z-direction adjusting unit is further included, which is arranged above the Y-direction slider and the moving seat and is used to adjust the pitch of the crossbeam.

[0018] In some embodiments, the Z-direction adjusting unit includes a planar slider, a hollow bolt and an adjusting bolt;

[0019] The planar slider is horizontally arranged and abuts against the upper end surface of the moving seat in parallel from top to bottom;

[0020] The hollow bolt is vertically arranged, threadedly sleeved in the planar slider, and its threaded end abuts against the upper end surface of the Y-direction slider;

[0021] The adjusting bolt is coaxially arranged inside the hollow bolt and is threadedly connected to the hollow bolt and the Y-direction slider in sequence, thereby fixedly clamping the planar slider against the upper end surface of the moving seat;

[0022] The flexible unit further includes connecting bolts. There are multiple connecting bolts. The threaded ends of the multiple connecting bolts penetrate the thickness direction of the elastic sheet along the Y direction and are respectively screwed into the planar slider and the moving seat.

[0023] Through a decoupling mechanism provided by the present application, after the connecting bolts fix the planar slider above the moving seat, in specific applications, according to actual needs, the hollow bolt is screwed to adjust the length of its threaded end protruding from the lower end surface of the planar slider, so as to adjust the distance between the Y-direction slider and the planar slider. Then, the adjusting bolt is screwed to fix the distance between the Y-direction slider and the planar slider, and thus the height of the end of the cross beam provided with the Y-direction slider can be adjusted, and further the pitching of the cross beam can be adjusted; the Z-direction adjusting unit has a simple structure and is convenient to assemble, which helps to further improve the use convenience of the decoupling mechanism and further save the production cost of the decoupling mechanism.

[0024] On the other hand, the present application further provides a gantry structure, including:

[0025] A bracket, the bracket includes two slide rails arranged in parallel at intervals;

[0026] A cross beam, the cross beam is horizontally arranged, the length direction thereof is perpendicular to the length direction of the slide rails, both ends of the cross beam are respectively connected with a first sliding seat and a second sliding seat, and are respectively correspondingly placed on the two slide rails through the first sliding seat and the second sliding seat to horizontally slide on the slide rails along the length direction of the slide rails;

[0027] Both the first sliding seat and the second sliding seat include any one of the above-mentioned moving seats.

[0028] In some embodiments, one end of the cross beam is provided with a connecting rod, the connecting rod is perpendicular to the cross beam, and is slidably arranged on the corresponding slide rail through the first sliding seat or the second sliding seat, and at least two are installed below the connecting rod corresponding to the first sliding seat or the second sliding seat;

[0029] The bracket is also provided with a power component for driving the corresponding first sliding seat or the second sliding seat to slide relative to the slide rail.

[0030] Through a gantry structure provided by the present application, a connecting rod is arranged at one end of the beam, and at least two first sliding seats or second sliding seats are installed under the connecting rod, and a power member is arranged to drive the corresponding first sliding seat or second sliding seat to move; the beam is synchronously driven to move relative to the slide rail by at least two moving seats, thereby effectively improving the stability of the beam movement process, thereby minimizing the jamming phenomenon caused by the asynchronous movement of the two ends, improving the structural strength of the corresponding gantry structure, and further improving the operating accuracy of the corresponding print head thereon, thereby ensuring the printing quality.

[0031] In some embodiments, the power member comprises a motor and a screw;

[0032] The housing of the motor is fixed on the bracket, and the output shaft thereof is arranged parallel to the slide rail;

[0033] The screw rod is coaxially connected to the output shaft of the motor, and one end of the screw rod facing away from the motor is rotatably connected to the bracket.

[0034] A support block is mounted on the connecting rod, and the screw rod penetrates the support block along the length direction of the slide rail and is threadedly connected to the support block.

[0035] Through the gantry structure provided in this application, the motor drives the corresponding first sliding seat or the second sliding seat by means of the threaded connection between the screw rod and the support block. The driving structure is simple and easy to set up, which effectively ensures the convenience of production of the gantry structure and stabilizes and saves enterprise production.

[0036] In some embodiments, a reinforcing rod is further included, wherein two ends of the reinforcing rod are respectively connected to an end of the connecting rod away from the crossbeam and a middle position of the crossbeam.

[0037] Through the gantry structure provided by the present application, the reinforcing rod is used to enhance the structural strength between the beam and the connecting rod, thereby further ensuring the driving effect of the power component on both ends of the beam and improving the consistency of the movement at both ends.

[0038] The present application also provides a 3D printer, comprising any of the above-mentioned gantry structures, and further comprising:

[0039] The nozzle is slidably arranged on the crossbeam along the length direction of the crossbeam.

[0040] Compared with the prior art, the decoupling mechanism, gantry structure, and 3D printer provided by this application have at least one of the following beneficial effects:

[0041] 1. In this application, a Y-direction slider is provided at one end of the crossbeam, and a chute is provided on the moving seat. By means of the sliding fit of the Y-direction slider and the chute in the Y direction, and the flexible unit, one end of the crossbeam is flexibly connected to the moving seat in the Y direction. When the crossbeam expands due to heat, the elastic deformation of the flexible unit is used to absorb the deformation of the crossbeam in the Y direction, reduce the side pressure of the crossbeam on the slide rail seat after the crossbeam expands due to heat, and the stress concentration at specific positions at both ends of the crossbeam, thereby effectively ensuring the overall strength of the corresponding gantry structure and extending its service life. Moreover, since the moving seat can move normally, the movement accuracy of the corresponding print head is also effectively improved, ensuring the printing quality of the corresponding model.

[0042] 2. In this application, the elastic piece and the connecting bolt not only realize the elastic connection between the Y-direction slider and the moving seat in the Y direction, but also realize the fixed installation of the planar slider above the moving seat. The structure is simple and serves multiple purposes. While saving the cost of the decoupling mechanism, it also ensures its convenience of use. In addition, the hollow bolt and the adjusting bolt are provided to cooperate with the planar slider to realize the pitching adjustment of the crossbeam in the Z direction, further reducing the production and use costs of the decoupling mechanism and effectively promoting energy conservation and cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The following will further illustrate the above-mentioned characteristics, technical features, advantages and their implementation manners of the present solution in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0044] Figure 1 is an isometric schematic diagram mainly showing the relative position relationship between the crossbeam and the slide rail in the embodiment of the present application;

[0045] Figure 2 is Figure 1 an enlarged view of part A in, mainly showing the cooperation relationship between the Y-direction slider and the moving seat;

[0046] Figure 3 is a partial enlarged view mainly showing the cooperation relationship of each part of the decoupling mechanism in the embodiment of the present application;

[0047] Figure 4 is a partial enlarged view mainly showing the cooperation relationship of each part of the Z-direction adjusting unit in the embodiment of the present application;

[0048] [[ID=2⑨]] Figure 5 is an isometric schematic diagram mainly showing the overall structure of the gantry structure in the embodiment of the present application.

[0049] DESCRIPTION OF THE REFERENCE NUMERALS:

[0050] 1. Decoupling mechanism; 11. Y-direction slider; 12. Moving seat; 121. Chute; 122. Protrusion; 13. Flexible unit; 14. Z-direction adjusting unit; 141. Planar slider; 142. Hollow bolt; 143. Adjusting bolt;

[0051] 100, Support; 200, Crossbeam; 300, Slide Rail; 310, Slide Rail Base; 400, Connecting Rod; 410, Support Block; 500, Power Component; 510, Motor; 520, Lead Screw; 600, Reinforcing Rod. Detailed Implementation Manner

[0052] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific implementation manners of the present application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings and other implementation manners can be obtained.

[0053] To simplify the drawings, only the parts related to the present application are schematically shown in each drawing, and they do not represent their actual structures as products. In addition, to simplify the drawings for easy understanding, in some drawings, parts with the same structure or function are only schematically shown as one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0054] Currently, for 3D printing devices on the market, the ends of their upper crossbeams are generally connected to the corresponding moving seats by direct fastening; however, with this connection method, after the crossbeam expands and deforms due to heat, it not only generates a lateral pressure on the corresponding slide rail base, increasing the movement resistance of the corresponding moving seat and exacerbating the wear of the corresponding slide rail, but also causes the stress at the fixed positions at both ends of the crossbeam to be too concentrated, reducing the overall strength of the corresponding gantry structure and shortening its service life; in addition, it also reduces the movement accuracy of the print head and affects the printing quality.

[0055] In response to this, referring to the Figures 1 to 4 accompanying drawings of the specification, in one embodiment, a decoupling mechanism is provided, which is applied between the crossbeam and the slide rail of the 3D printer gantry structure, and is used to minimize the influence of the crossbeam's thermal expansion on the corresponding moving seat. While improving the overall strength of the corresponding gantry structure and extending its service life, it significantly improves the movement accuracy of the corresponding print head on the crossbeam and ensures the printing quality.

[0056] Specifically, it includes a Y-direction slider 11 arranged at one axial end of the beam 200, and a movable seat 12 arranged on the slide rail 300, wherein the movable seat 12 slides relative to the slide rail 300 along the length direction of the slide rail 300, and a slide groove 121 is opened on it along the Y direction, the Y-direction slider 11 is embedded in the slide groove 121, and slides and cooperates with the corresponding movable seat 12 along the Y direction; at the same time, a flexible unit 13 is provided at the end of the movable seat 12 away from the beam 200, and the flexible unit 13 is detachably connected to the Y-direction slider 11 and the movable seat 12 along the Y direction. Because it has elasticity along the Y direction, it can absorb the deformation of the beam 200 along the Y direction after the beam 200 expands due to heat.

[0057] In this way, with the help of the Y-direction slider 11 and the slide groove 121 cooperating along the Y-direction slider 11 and the flexible unit 13, the Y-direction slider 11 and the moving seat 12 are flexibly connected along the Y-direction. When the beam 200 is heated and expanded, the Y-direction slider 11 slides along the Y-direction relative to the moving seat 12, pushing the flexible unit 13 to produce elastic deformation along the Y-direction. The elastic deformation of the flexible unit 13 absorbs the deformation of the beam 200 along the Y-direction, reducing the lateral pressure of the beam 200 on the slide rail 300 seat after the beam 200 is deformed by thermal expansion, thereby ensuring the normal operation of the moving seat 12, reducing the wear of the slide rail 300, and reducing the stress concentration at specific positions at both ends of the beam 200, thereby effectively ensuring the overall strength of the corresponding gantry structure and extending its service life; and since the moving seat 12 can operate normally, it also effectively improves the movement accuracy of the corresponding print head, thereby ensuring the printing quality of the corresponding model.

[0058] In one embodiment, based on the above embodiment, specifically, referring to Figures 2 to 4 In this embodiment of the present application, the Y-direction slider 11 is integrally formed with the crossbeam 200 and is located on the centerline of the crossbeam 200 along the X-direction. The movable seat 12 is generally rectangular in structure, and the slide groove 121 is provided at its middle position along the X-direction and passes through the upper end surface of the movable seat 12. Of course, in the embodiment of the present application, the Y-direction slider 11 can also be spliced onto the crossbeam 200 via a connecting structure, or provided at other positions on the end of the crossbeam 200. The structure of the movable seat 12 and the position of the slide groove 121 thereon can also be configured differently as needed. This application only uses the above configuration as an example to specifically illustrate the technical principles of this solution.

[0059] Reference Figures 2 to 4 The flexible unit 13 includes a spring piece and a connecting bolt; in this embodiment of the present application, the spring piece is a U-shaped sheet structure as a whole, and the spring piece is parallel to the Y-direction slider 11 and the side of the movable seat 12 away from the beam 200 along its thickness direction, and its opening is kept facing downward; the connecting bolt is arranged along the Y direction, and its threaded end passes through the thickness direction of the spring piece, and then the thread is screwed into the movable seat 12, so that the spring piece can be detachably installed on the movable seat 12 along the Y direction, and the Y-direction slider 11 is sealed in the slide groove 121.

[0060] Of course, in the embodiment of the present application, the spring piece can also be set to other shapes such as a circular shape, a square piece, etc., which will not be described in detail here.

[0061] Furthermore, a protrusion 122 is also provided on the movable seat 12. Specifically, the protrusion 122 is arranged corresponding to the two inner side walls of the slide groove 121, that is, there are two protrusions 122, and the two protrusions 122 are respectively formed at the middle position of the corresponding side walls of the slide groove 121 along the Y direction, and the side walls close to each other are arranged in parallel and spaced apart; after the Y-direction slider 11 is embedded in the slide groove 121, its side walls on both sides of the Y direction are respectively parallel to the corresponding side walls of the two protrusions 122 close to each other, and slide and cooperate with the corresponding protrusions 122 along the Y direction.

[0062] In this embodiment of the present application, the protrusion 122 is used to reduce the contact area between the Y-direction slider 11 and the movable seat 12, reduce the production difficulty of the movable seat 12, and ensure that the slide 121 accurately guides the Y-direction slider 11 along the Y-direction; at the same time, since the protrusion 122 is located in the middle position of the side wall of the slide 121 along the Y-direction, it also provides some margin for the shaking of the beam 200 along the X-direction during the movement process, thereby helping to reduce the probability of the two ends of the beam 200 moving out of sync and getting stuck due to shaking along the X-direction during the movement process, and effectively improving the stability of the sliding movement of the beam 200.

[0063] In addition, in this embodiment of the present application, a Z-axis adjustment unit 14Z for adjusting the pitch of the beam 200 is also provided above the Y-axis slider 11 and the movable seat 12; specifically, the Z-axis adjustment unit 14Z includes a planar slider 141, a hollow bolt 142 and an adjusting bolt 143; wherein, the planar slider 141 is configured as a rectangular plate structure and is horizontally arranged. During assembly, the planar slider 141 is parallel to and pressed against the upper end face of the movable seat 12 from top to bottom; the hollow bolt 142 is vertically screwed into the planar slider 141, and its threaded end is pressed against the upper end face of the Y-axis slider 11; the adjusting bolt 143 is coaxially screwed into the inside of the hollow bolt 142, and then threadedly connected to the Y-axis slider 11, thereby fixing the planar slider 141 against the upper end face of the movable seat 12. Since the flexible unit 13 includes a plurality of connecting bolts, some of the connecting bolts penetrate the elastic sheet and are screwed into the planar slider 141 , thereby fixing the planar slider 141 to the upper end surface of the movable base 12 .

[0064] In practical applications, when the crossbeam 200 undergoes thermal expansion and deformation and needs to be adjusted in pitch along the Z direction, the staff first turns the adjusting bolt 143 to remove its threaded end from the Y-direction slider 11. Subsequently, according to the compensation amount for the deformation of the crossbeam 200, the hollow bolt 142 is turned to adjust the length of its threaded end extending from the lower end face of the planar slider 141, thereby adjusting the distance between the Y-direction slider 11 and the planar slider 141. After that, the adjusting bolt 143 is turned again to screw its threaded end back into the Y-direction slider 11 to fix the distance between the Y-direction slider 11 and the planar slider 141, thus realizing the adjustment of the pitch of the crossbeam 200. The Z-direction adjusting unit 14Z has a simple structure and is convenient for production and assembly, making the cost of the decoupling mechanism 1 lower.

[0065] In this way, the end of the crossbeam 200 is flexibly connected to the corresponding moving seat 12 along the Y direction and is adjustable along the Z direction, so that after it undergoes thermal expansion and deformation, it can be appropriately adjusted relative to the corresponding moving seat 12, effectively reducing the lateral pressure on the slide rail 300 seat and reducing the stress concentration at specific positions at both ends of the crossbeam 200, thereby ensuring the overall strength of the corresponding gantry structure, extending its service life. At the same time, the movement accuracy of the corresponding print head is improved, and thus the printing quality of the corresponding model is ensured. In addition, due to the simple overall structure and low cost of the decoupling mechanism 1, it effectively promotes energy conservation and cost reduction of the enterprise.

[0066] Next, taking the application of the decoupling mechanism 1 in a specific gantry structure as an example, the implementation principle of the present application will be further elaborated. In one embodiment, refer to Figure 1 And Figure 5 , a gantry structure is provided, including a bracket 100 and a crossbeam 200 provided thereon. The bracket 100 includes two slide rails 300 arranged in parallel at intervals. The crossbeam 200 is horizontally arranged, and its length direction is perpendicular to the length direction of the slide rails 300 (in the present application, the length direction of the crossbeam 200 is the Y direction, and the length direction of the slide rails 300 is the X direction). One end or both ends of the crossbeam 200 are arranged on the slide rail 300 seats of the corresponding slide rails 300 through the decoupling mechanism 1 to be slidably arranged on the two slide rails 300 along the length direction of the slide rails 300.

[0067] To reduce the probability of movement jamming caused by the asynchronous operation of both ends of the crossbeam 200, in this embodiment of the present application, the decoupling mechanism 1 is only arranged at one end in the length direction of the crossbeam 200, and the moving seat 12 of the corresponding decoupling mechanism 1 is fixed on the slide rail 300 seat of the corresponding slide rail 300; while at the other end of the crossbeam 200, a connecting rod 400 is installed. The connecting rod 400 is perpendicular to the crossbeam 200 and is slidably arranged on the other slide rail 300 through the slide rail 300 seat.

[0068] In this embodiment of the present application, at least two slide rail 300 seats are arranged in sequence along the length direction of the slide rail 300 below the connecting rod 400; and a power part 500 is provided on the bracket 100 corresponding to the connecting rod 400 for driving the slide rail 300 seat to slide relative to the slide rail 300.

[0069] Reference Figure 5 , the power part 500 motor 510 and screw rod 520; wherein, the housing of the motor 510 is fixed on the slide rail 300 on which the connecting rod 400 is installed, specifically, it is installed on the side wall of the corresponding slide rail 300, and its output shaft is arranged parallel to the slide rail 300; the screw rod 520 is coaxially connected to the end of the output shaft of the motor 510, and its end away from the motor 510 is rotated and overlapped on the support on the side wall of the slide rail 300; a support block is installed on the side wall of the connecting rod 400 near the screw rod 520. After assembly, the screw rod 520 passes through the support block along the length direction of the slide rail 300 and is threadedly connected to the support block.

[0070] In actual application, after the motor 510 is started, its output shaft rotates, driving the screw rod 520 to rotate synchronously. Since the screw rod 520 is threadedly connected to the support block, when the screw rod 520 rotates, it pushes the support block to move axially along the screw rod 520, so that the support block drives the connecting rod 400 and the corresponding beam 200 to move synchronously, thereby realizing the sliding of the beam 200 along the length direction of the slide rail 300.

[0071] Furthermore, in order to enable a power component 500 to drive both ends of the beam 200 as synchronously as possible, in this embodiment of the present application, a reinforcing rod 600 is further provided on the beam 200, and both ends of the reinforcing rod 600 are respectively connected to one end of the connecting rod 400 away from the beam 200 and the middle position of the beam 200, so that the beam 200, the connecting rod 400 and the reinforcing rod 600 are arranged to form a stable triangular structure, thereby improving the overall strength of the moving structure on the two slide rails 300, reducing the deformation of the beam 200, and causing the moving seat 12 to get stuck.

[0072] In the embodiment of the present application, the reinforcing rod 600 can be connected to the third part of the crossbeam 200 away from the connecting rod 400, so that the angle between the crossbeam 200 and the reinforcing rod 600 is approximately 30 degrees. This allows the center of mass of the mobile structure on the two slide rails 300 to be as close as possible to the connecting rod 400, thereby ensuring the driving force of the power component 500 on the mobile structure. At the same time, the space occupied by the mobile structure is reduced and the movement stroke of the crossbeam 200 is extended as much as possible. Of course, the installation form of the reinforcing rod 600 can also be set in another way. Any installation form that can ensure stable driving of the crossbeam 200 on the two slide rails 300 is acceptable, and the embodiment of the present application does not impose any specific restrictions on this.

[0073] Of course, when the gantry structure is applied to a specific 3D printing scenario, the technical principle of the present application should also be elaborated. In one embodiment, a 3D printer is provided, which includes the gantry structure described in any of the above embodiments. Of course, it also includes a nozzle, and the nozzle is slidably arranged on the cross beam 200 along the length direction of the cross beam 200.

[0074] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A decoupling mechanism is applied between the cross beam and the slide rail of the gantry structure of a 3D printer, and is characterized in that, Comprising: A Y-direction slider, provided at one end of the axial direction of the cross beam; A moving seat, slidably arranged on the slide rail along the length direction of the slide rail; a chute is formed through the moving seat in the Y direction, and the Y-direction slider is embedded in the chute and slidably cooperates with the corresponding moving seat in the Y direction; A flexible unit, detachably connected to the Y-direction slider and the moving seat in the Y direction, and provided at one end of the moving seat facing away from the cross beam. The flexible unit has elasticity in the Y direction so as to absorb the deformation of the cross beam in the Y direction after the cross beam expands due to heat.

2. The decoupling mechanism according to claim 1, wherein The flexible unit includes a spring piece; The spring piece is parallelly abutted against the sides of the Y-direction slider and the moving seat facing away from the cross beam, and is detachably connected to the moving seat in the Y direction.

3. The decoupling mechanism according to claim 1 or 2, wherein Protrusions are formed on the moving seat, and one protrusion is provided at the middle position of the two side walls of the chute in the Y direction; The side walls of the Y-direction slider corresponding to the two sides in the Y direction are respectively parallelly abutted against the corresponding protrusions and slidably cooperate with the corresponding protrusions in the Y direction.

4. The decoupling mechanism according to claim 2, wherein It further includes a Z-direction adjusting unit, provided above the Y-direction slider and the moving seat, for adjusting the pitch of the cross beam.

5. The decoupling mechanism according to claim 4, wherein The Z-direction adjusting unit includes a flat slider, a hollow bolt and an adjusting bolt; The flat slider is horizontally arranged and abuts against the Y-direction slider and the moving seat from top to bottom in parallel; The hollow bolt is vertically arranged and is screwed into the flat slider, and its threaded end abuts against the upper end surface of the Y-direction slider; The adjusting bolt is coaxially arranged inside the hollow bolt and is sequentially threadedly connected to the hollow bolt and the Y-direction slider, thereby fixedly abutting the flat slider against the upper end surface of the upper end surface of the Y-direction slider; The flexible unit further includes connecting bolts. There are multiple connecting bolts. After the threaded ends of the multiple connecting bolts penetrate the thickness direction of the spring piece in the Y direction, they are respectively screwed into the flat slider and the moving seat.

6. A gantry structure, characterized in that, Including the decoupling mechanism according to any one of claims 1-5 above: It further includes: A bracket, the bracket includes two slide rails arranged in parallel at intervals; A cross beam, the cross beam is horizontally arranged, and the length direction thereof is perpendicular to the length direction of the slide rail. The end of the cross beam is provided on the corresponding slide rail seat of the slide rail through the decoupling mechanism to horizontally slide on the slide rail along the length direction of the slide rail.

7. The gantry structure according to claim 6, wherein One end of the cross beam is provided with a connecting rod, the connecting rod is perpendicular to the cross beam and is slidably arranged on the corresponding slide rail through the slide rail seat, and at least two are installed below the corresponding slide rail seat; A power member for driving the corresponding slide rail seat to slide relative to the slide rail is further provided on the bracket.

8. The gantry structure according to claim 7, wherein The power member is a motor and a lead screw; The housing of the motor is fixed on the bracket, and the output shaft thereof is arranged parallel to the slide rail; The screw rod is coaxially connected to the output shaft of the motor, and one end of the screw rod facing away from the motor is rotatably connected to the bracket. A support block is mounted on the connecting rod, and the screw rod penetrates the support block along the length direction of the slide rail and is threadedly connected to the support block.

9. A gantry structure according to claim 7 or 8, characterized in that: It also includes a reinforcing rod, the two ends of which are respectively connected to the end of the connecting rod away from the crossbeam and the middle position of the crossbeam.

10. A 3D printer, characterized in that, The gantry structure according to any one of claims 6 to 9 further comprises: The nozzle is slidably arranged on the crossbeam along the length direction of the crossbeam.

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