Guide rail and slider for 3D printer, 3D printer and 3D printing system

Abstract

A guide rail and slider (1029a) for a 3D printer, a 3D printer (102) and a 3D printing system (10). The guide rail and slider (1029a) comprises: a slider main body (1), a first surface thereof being fixedly provided with a limiting boss (2); a first sliding wheel (3) and a second sliding wheel (4), which are arranged on a second surface of the slider main body (1), the first sliding wheel (3) and the second sliding wheel (4) being used for holding a guide rail (12) on both sides, and the second surface being a surface opposite the first surface; and a cam (6), which is arranged on the first surface of the slider main body (1), wherein a rotating shaft of the cam (6) is perpendicular to the first surface, and an abutting surface of the cam (6) abuts against a side surface of the limiting boss (2), the abutting surface being the circumferential side surface of the cam (6). One end of a first transmission shaft (5) is coaxially connected to the first sliding wheel (3), the first transmission shaft (5) passes through a first limiting hole (13) in the slider main body (1), and the other end of the first transmission shaft (5) is coaxially connected to the cam (6), the area of the first limiting hole (13) being greater than the cross-sectional area of the first transmission shaft (5). The direction between the limiting boss (2) and the cam (6) is the same as the direction between the first sliding wheel (3) and the second sliding wheel (4); when the cam (6) rotates, the rotating shaft of the cam (6) moves away from or closer to the limiting boss (2).

Description

Guide rail slider for 3D printer, 3D printer and 3D printing system

[0001] This application claims priority to the Chinese patent application with application number 2023233354656 filed with the State Intellectual Property Office of China on December 6, 2023, and priority to the Chinese patent application with invention title “Guide rail slider, 3D printer and 3D printing system for 3D printer”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of 3D printers, and in particular to a guide rail slider for a 3D printer, a 3D printer, and a 3D printing system. Background Art

[0003] During 3D printing, a motor is sometimes required to drag a guide rail slider via a synchronous belt to achieve printing in a certain direction. During this process, the slider moves along a pre-set guide rail. Specifically, the slider can be equipped with multiple pulleys, evenly distributed on both sides of the rail. When the slider is driven by the synchronous belt, the pulleys on both sides of the rail rotate, allowing the slider to move along the rail.

[0004] In practical applications, in order to ensure the stability of the slider movement, the pulley needs to be kept tightly clamped on both sides of the guide rail at all times; therefore, the pulley needs to be designed as an adjustable structure. For example, the relative position of the pulley on the eccentric wheel and the slider can be adjusted by rotating the eccentric wheel on the slider, so that the pulleys on both sides can clamp the guide rail, but this adjustment method is not reliable.

[0005] Summary of the Invention

[0006] The present application provides a guide rail slider for a 3D printer, the guide rail slider comprising:

[0007] The slider body has a first surface fixed with a limiting boss;

[0008] A first pulley and a second pulley are provided on a second surface of the slider body, the first pulley and the second pulley are used to be clamped on both sides of the guide rail, and the second surface is the opposite side of the first surface;

[0009] A cam is provided on the first surface of the slider body; the rotation axis of the cam is perpendicular to the first surface, the abutment surface of the cam abuts against the side surface of the limiting boss, and the abutment surface is a circumferential side surface of the cam;

[0010] A first transmission shaft has one end coaxially connected to the first pulley, the first transmission shaft passes through a first limiting hole on the slider body, and the other end of the first transmission shaft is coaxially connected to the cam, the area of ​​the first limiting hole is larger than the cross-sectional area of ​​the first transmission shaft, the direction between the limiting boss and the cam is the same as the direction between the first pulley and the second pulley, and the rotating shaft of the cam moves away from or closer to the limiting boss when the cam rotates, so that the first pulley coaxially connected to the cam moves closer to or away from the second pulley.

[0011] In the embodiment of the present application, the cam is prevented from being offset by fixing the position of the limiting boss, thereby making the structure more reliable. In addition, this method has a simple structure, low cost and convenient processing.

[0012] In combination with the first aspect, in a first possible implementation manner, the first limiting hole is an elongated hole, and a length direction of the elongated hole is in the same direction as a direction between the first pulley and the second pulley.

[0013] In the embodiment of the present application, when the user rotates the cam, the first transmission shaft can move in the first limiting hole, thereby causing the first pulley to approach or move away from the second pulley.

[0014] In combination with the first aspect or any one of the above possible implementations, in a second possible implementation, a side surface of the limiting boss for abutting the abutting surface is perpendicular to the first surface.

[0015] In the embodiment of the present application, the side surface of the limiting boss is perpendicular to the first surface of the slider body, so that the side surface of the limiting boss can provide a better limiting effect for the rotation of the cam.

[0016] In combination with the first aspect or any one of the above possible implementations, in a third possible implementation, a side surface of the limiting boss for abutting the abutting surface is parallel to a rotation axis of the cam.

[0017] In combination with the first aspect or any one of the above possible implementations, in a fourth possible implementation, the limiting boss is located on a side of the cam away from the second pulley.

[0018] In combination with the first aspect or any of the above possible implementations, in a fifth possible implementation, the guide rail slider further includes: a first limit member, detachably connected to the slider body, for fixing the cam to the slider body to prevent the cam from rotating.

[0019] In the embodiment of the present application, after the user completes the adjustment, the user can fix the cam by the first limit member, thereby preventing the adjusted cam from continuing to rotate and driving the movement of the first pulley.

[0020] In combination with the first aspect or any of the above possible implementations, in a sixth possible implementation, the first limiting member includes a screw, a rocker arm is provided on one side of the cam, and a second limiting hole is provided on the end of the rocker arm away from the rotating shaft of the cam, and the area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw; a first screw hole corresponding to the screw is provided on the slider body, and the screw is used to pass through the second limiting hole and the first screw hole to fix the cam by fixing the rocker arm.

[0021] In the embodiment of the present application, after adjustment, the user can fix the rocker arm to the slider body with a screw, thereby fixing the cam to prevent the cam from rotating. The area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw, so that the cam can rotate within a certain range without affecting the fixation of the cam.

[0022] In combination with the first aspect or any one of the above possible implementations, in a seventh possible implementation, the rocker arm and the abutting surface are respectively located on both sides of the cam.

[0023] In combination with the first aspect or any one of the above possible implementations, in an eighth possible implementation, the second limiting hole is an elongated hole, and the length direction of the elongated hole is perpendicular to the radial direction of the cam.

[0024] In the embodiment of the present application, the design of the elongated hole allows the cam to have a larger adjustable rotation range.

[0025] In combination with the first aspect or any one of the above possible implementations, in a ninth possible implementation, the first screw hole includes a first sub-screw hole and a second sub-screw hole; when the cam rotates to a first angle, the screw is used to pass through the second limiting hole and the first sub-screw hole; when the cam rotates to a second angle, the screw is used to pass through the second limiting hole and the second sub-screw hole.

[0026] In the embodiment of the present application, the design of at least two screw holes allows the cam to have a larger adjustable rotation range.

[0027] In a second aspect, an embodiment of the present application provides a 3D printer, comprising the guide rail slider, guide rail, printing platform, drive device, and base described in combination with the first aspect or in combination with any one of the possible implementations of the first aspect.

[0028] The guide rail slider is connected to the printing platform, the base is fixedly connected to the guide rail, the guide rail is slidably connected to the guide rail slider, and the driving device is used to drive the guide rail slider and the guide rail to generate relative displacement, so as to drive the relative displacement between the printing platform and the guide rail.

[0029] In a third aspect, an embodiment of the present application provides a 3D printing system, comprising a feeding device and a 3D printer described in combination with the third aspect; wherein the feeding device is used to provide a material line to the 3D printer.

[0030] It should be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of a scenario of a 3D printing system provided in an embodiment of the present application;

[0032] FIG2a is a schematic diagram of the three-dimensional structure of the guide rail slider according to an embodiment of the present application;

[0033] FIG2 b is a schematic diagram of the three-dimensional structure of the guide rail slider according to an embodiment of the present application;

[0034] FIG2c is a schematic diagram of the three-dimensional structure of the guide rail slider according to an embodiment of the present application;

[0035] FIG2 d is a schematic diagram of the three-dimensional structure of the guide rail slider according to an embodiment of the present application;

[0036] FIG2e is a schematic diagram of the three-dimensional structure of the guide rail slider according to an embodiment of the present application;

[0037] FIG3 is a schematic plan view of the cam structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] The implementation of the technical solution of the present application is further described in detail below with reference to the accompanying drawings.

[0039] It should be understood that connections include both detachable and non-detachable connections. For example, fixed connections may include both detachable and non-detachable fixed connections, rotational connections may include both detachable and non-detachable rotational connections, and sliding connections may include both detachable and non-detachable sliding connections. Connections may also be direct or indirect via a component. For example, a detachable and fixed connection refers to a connection in which the positional relationship between at least two connected objects can be fixed in the installed state; similar examples also include rotational connections and sliding connections.

[0040] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood to imply or suggest relative importance or to implicitly indicate the number or order of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0041] The terms "parallel," "perpendicular," and "same direction" are based on the current state of the art, rather than being strictly mathematically defined, and allow for a small amount of deviation. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For another example, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. For another example, "A and B are in the same direction" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°.

[0042] Spatially relative terms such as "below," "beneath," "lower," "beneath," "above," "upper," and the like may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is flipped, an element described as "below" or "beneath" or "beneath" other elements or features would be oriented "above" the other elements or features. Thus, the example terms "below" and "beneath" may encompass both orientations of "above" and "beneath." Terms such as "before" or "before" and "after" or "followed by" may similarly be used, for example, to indicate the order in which light passes through the elements. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0043] Referring to Figure 1 , which is a schematic diagram of a 3D printing system according to an embodiment of the present application, the 3D printing system 10 includes a feeding device 101 and a 3D printer 102 . The feeding device 101 is used to provide a material line to the 3D printer.

[0044] The feeding device 101 can be equipped with a material tray, which is wound with printing material (material line). The feeding device 101 can provide the printing material to the 3D printer 102, or the printing material can be rewound back to the material tray through the feeding device 101. In other words, the feeding device 101 can both feed and return material. For example, the feeding device 101 can also identify material information of the printing material and send the material information to the 3D printer 102.

[0045] The 3D printer 102 includes a print head 1021, which includes a hot end 10212 and an extruder assembly. During material feeding from the feeder 101, the printing material passes through the extruder assembly and is delivered to the hot end 10212. During material withdrawal from the feeder 101, the 3D printer 102 cuts the printing material in the print head 1021, and the extruder assembly delivers the printing material to the feeder 101.

[0046] Optionally, the 3D printer 102 may, for example, cut the printing material between the extrusion assembly and the hot end 10212 or may cut the printing material in the extrusion assembly, etc. This application does not limit the position where the 3D printer cuts the printing material.

[0047] Exemplarily, the 3D printer 102 further includes a print panel 1023, a heated bed 1024, a base 1025a, and a guide slider 1029a. The heated bed 1024 is located on the side of the base 1025a facing the nozzle of the hot end 10212 and has a heating function. The print panel 1023 is located on the side of the heated bed 1024 facing the nozzle of the hot end 10212. Heat from the heated bed 1024 is transferred to the print panel 1023, and the nozzle of the hot end 10212 extrude molten printing material onto the print panel 1023. Optionally, the 3D printer 102 further includes a base 1025b and a slider 1029b. The print panel 1023 and heated bed 1024 can form a printing platform.

[0048] In a specific implementation, the 3D printer can adjust the temperature of the hot end 10212 and the hot bed 1024 , adjust the temperature of the hot end 10212 to heat the printing material to a molten state, and adjust the temperature of the hot bed 1024 to adhere the printing material extruded by the nozzle of the hot end 10212 to the printing panel 1023 . Among them, the print head 1021 is slidably connected to the first guide rail 1026, and the print head 1021 can move along the length direction of the first guide rail 1026, that is, the print head 1021 is displaced relative to the print panel 1023 along the length direction of the first guide rail 1026, and the hot bed 1024 is directly or indirectly connected to the guide rail slider 1029a. For the indirect connection, it can be, for example, fixedly connected to the hot bed bracket through the guide rail slider 1029a, and the hot bed bracket is elastically connected or fixedly connected to the hot bed, and the second guide rail 1027 is slidably connected to the second guide rail 1027 through the guide rail slider 1029a. The hot bed 1024 moves along the length direction of the second guide rail 1027, that is, the print head 1021 is displaced relative to the print panel 1023 along the length direction of the second guide rail 1027, and the length direction of the second guide rail 1027 is perpendicular to the length direction of the first guide rail 1026. Furthermore, the first guide rail 1026 is slidably connected to the third guide rail 1028. By moving the first guide rail 1026 along the third guide rail 1028, the 3D printer 102 can achieve displacement of the print head 1021 relative to the print panel 1023 in a direction perpendicular to the length of the second guide rail 1027 and in a direction perpendicular to the length of the first guide rail 1026. That is, the 3D printer 102 can achieve three mutually perpendicular printing paths to print a three-dimensional object. A drive device can be used to drive relative displacement between the guide rail slider 1029a and the second guide rail 1027. The third guide rail 1028 can be one, two, or three. The guide rail can be a guide rail corresponding to the guide rail slider, or it can be a lead screw, or a combination of a lead screw and an optical axis.

[0049] In a possible implementation, the driving device may include a synchronous belt, at least a synchronous pulley, and a motor coaxially or in transmission connection with one of the synchronous pulleys.

[0050] In the embodiment of the present application, a cam and a limiting boss are provided for the pulley. The fixed position of the limiting boss prevents the cam from being offset, thereby making the structure more reliable. In addition, this method has a simple structure, low cost and convenient processing.

[0051] The structure of the guide rail slider is described in detail below with reference to FIG. 2 a to FIG. 3 .

[0052] Refer to Figure 2a and Figure 2b; Figure 2a is a schematic diagram of the three-dimensional structure of the guide rail slider of an embodiment of the present application from one perspective, and Figure 2b is a schematic diagram of the three-dimensional structure of the guide rail slider of an embodiment of the present application from another perspective.

[0053] The guide rail slider may include:

[0054] The slider body 1 has a first surface fixed with a limiting boss 2;

[0055] The first pulley 3 and the second pulley 4 are arranged on the second surface of the slider body 1. The first pulley 3 and the second pulley 4 are used to be clamped on both sides of the guide rail 12. The second surface is the opposite side of the first surface.

[0056] The cam 6 is provided on the first surface of the slider body 1; the rotation axis of the cam 6 is perpendicular to the first surface, and the abutting surface of the cam 6 abuts against the side surface of the limiting boss 2, and the abutting surface is the circumferential side surface of the cam 6;

[0057] The first transmission shaft 5 has one end coaxially connected to the first pulley 3, and the first transmission shaft 5 passes through the first limiting hole 13 on the slider body. The other end of the first transmission shaft 5 is coaxially connected to the cam 6. The area of ​​the first limiting hole 13 is larger than the cross-sectional area of ​​the first transmission shaft 5. The direction between the limiting boss 2 and the cam 6 is the same as the direction between the first pulley 3 and the second pulley 4. When the cam 6 rotates, the rotating shaft of the cam 6 moves away from or close to the limiting boss 2, so that the first pulley 3 coaxially connected to the cam 6 moves close to or away from the second pulley 4.

[0058] Optionally, the first limiting hole 13 may be an arc-shaped hole, or a circular through hole, or an elongated hole, and the area of ​​the first limiting hole 13 is the active area of ​​the first transmission shaft.

[0059] Exemplarily, the guide rail slider can be connected to a synchronous belt; when the synchronous belt moves, it can drive the guide rail slider to move; the guide rail slider can be slidably connected to a preset guide rail, and when the guide rail slider moves, it can move along the trajectory of the preset guide rail 12; thereby, the guide rail slider can move back and forth stably in one direction along the guide rail 12, as shown in Figure 2c.

[0060] Among them, the guide rail slider can be connected to the hot bed or print head of the 3D printer, thereby driving the hot bed (or printing platform) or print head to move, and the embodiment of the present application does not limit this.

[0061] In some feasible embodiments, the guide rail slider may include a slider body 1 and pulleys disposed on the slider body 1. Specifically, a first pulley 3 and a second pulley 4 for clamping the two sides of the guide rail 12 may be disposed on the second surface of the slider body 1. By clamping the first pulley 3 and the second pulley 4 on both sides of the guide rail 12, the slider body 1 can be slidably connected to the guide rail via the first pulley 3 and the second pulley 4, as shown in FIG2d. The first pulley 3 and the second pulley 4 may be U-shaped bearings, specifically, the first pulley 3 may be a first U-shaped bearing, and the second pulley 4 may be a second U-shaped bearing. The guide rail 12 may be a dual-axis guide rail, which is not limited in this embodiment of the present application.

[0062] The guide rail slider may further include a cam 6 provided on a first surface opposite to the second surface of the slider body 1. The rotation axis of the cam 6 may be perpendicular to the first surface of the slider body 1, and the cam 6 may be connected to the first pulley 3 via the first transmission shaft 5. For example, the cam 6 may be cylindrical or elliptical (an elliptical cam may be shown in FIG. 2 b ); when the cam 6 is cylindrical, the rotation axis of the cam 6 may be located at a non-center position; when the cam 6 is elliptical, the rotation axis of the cam 6 may be located at a symmetrical center or at an asymmetrical center, and this embodiment of the present application does not impose any limitation on this.

[0063] Exemplarily, the first transmission shaft 5 can be a screw, specifically a bearing screw. In order to ensure that the screw hole corresponding to the screw has a thread of sufficient length, the screw hole corresponding to the screw can be designed as a flange structure; the flange is set outward from the screw hole.

[0064] Specifically, one end of the first transmission shaft 5 can be coaxially connected to the first pulley 3, and the other end of the first transmission shaft 5 can pass through the first limiting hole 13 provided on the slider body 1 and be coaxially connected to the cam 6. By rotating the cam 6, the first pulley 3 can be driven to move.

[0065] In some feasible embodiments, a limiting boss 2 is further provided on the first surface of the slider body 1, and the side surface of the limiting boss 2 can abut against the circumferential side surface of the cam 6, and the direction of the connecting line between the limiting boss 2 and the cam 6 is the same as the direction of the connecting line between the first pulley 3 and the second pulley 4.

[0066] Based on the above structure, when the cam 6 rotates, due to the setting of its rotating shaft position and the abutment of the circumferential side surface with the limiting boss 2, the rotating shaft of the cam 6 will move away from or approach the limiting boss 2; at this time, the first transmission shaft 5 coaxially connected to the cam 6 will move in the first limiting hole 13 whose area is larger than the cross-sectional area of ​​the first transmission shaft 5; further, the moving first transmission shaft 5 will drive the first pulley 3 coaxially connected at the other end to move; when the second pulley 4 does not move, the moving first pulley 3 will move closer to or away from the second pulley 4; when the first pulley 3 approaches the second pulley 4, the pulley and the guide rail 12 can be tensioned.

[0067] In one embodiment of the present application, the first limiting hole 13 is an elongated hole, and the length direction of the elongated hole is in the same direction as the direction between the first pulley and the second pulley, as shown in FIG2e .

[0068] In some feasible embodiments, the first limiting hole 13 can be an elongated hole, and the length direction of the elongated hole can be in the same direction as the direction of the line connecting the first pulley and the second pulley; so that when the first transmission shaft moves in the elongated hole, it can move back and forth in the direction of the line connecting the first pulley and the second pulley, thereby driving the first pulley closer to or away from the second pulley.

[0069] In one embodiment of the present application, the side surface of the limiting boss for abutting the abutting surface is perpendicular to the first surface. Specifically, the side surface of the limiting boss for abutting the circumferential side surface of the cam is also perpendicular to the first surface.

[0070] As an example, the side of the limiting boss for abutting the abutting surface is parallel to the rotation axis of the cam; specifically, the side of the limiting boss for abutting the circumferential side of the cam may also be parallel to the rotation axis of the cam perpendicular to the first surface.

[0071] As an example, the limiting boss is located on a side of the cam away from the second pulley.

[0072] In one embodiment of the present application, the guide rail slider further includes: a first limit member 7 (see FIG. 2 a ), which is detachably connected to the slider body and is used to fix the cam to the slider body to prevent the cam from rotating.

[0073] In some feasible embodiments, after adjusting the position of the first pulley, in order to avoid insufficient tensioning force of the first pulley and the second pulley on the guide rail 12 due to the rotation of the cam or the self-loosening of the first pulley, a first limit member 7 can be further provided on the guide rail slider, and the first limit member 7 can be detachably connected to the slider body; when the first limit member 7 is connected to the slider body, the cam fixing plate can be placed on the slider body to prevent the cam from rotating and causing the first pulley to shift; when the first limit member 7 is separated from the slider body, the cam can be rotated to adjust the position of the first pulley.

[0074] In one embodiment of the present application, the first limiting member 7 includes a screw. A rocker arm is provided on one side of the cam. A second limiting hole is provided on the end of the rocker arm away from the rotating shaft of the cam. The area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw. A first screw hole for the screw is provided on the slider body. The screw is used to pass through the second limiting hole and the first screw hole to fix the cam by fixing the rocker arm. The first screw hole is located within the range of the second limiting hole. Since the area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw, the area of ​​the second limiting hole is larger than the area of ​​the first screw hole, thereby allowing the cam to rotate within a certain range and still be fixed.

[0075] In some feasible embodiments, as shown in FIG3 , a rocker arm 10 may be provided on one side of the cam 6; when the cam 6 needs to be adjusted, the position of the rocker arm 10 may be adjusted to rotate the cam 6; a second limiting hole 9 may be provided on the rocker arm 10, and a first screw hole 8 corresponding to the screw may be provided on the slider body; when the cam 6 needs to be fixed, the first limiting member 7 may be passed through the second limiting hole 9 and the first screw hole 8. Specifically, the first screw hole 8 may have a thread, the first limiting member 7 may pass through the second limiting hole 9 and the first screw hole 8, and be screwed to the first screw hole 8. The first screw hole 8 may also not have a thread, the first limiting member 7 may pass through the second limiting hole 9 and the first screw hole 8, and be screwed to the nut.

[0076] It can be understood that the rocker arm can be part of the cam, or can be independent of the cam and fixedly connected to the cam.

[0077] Among them, the first limiting member 7 may include a screw; when the cam 6 needs to be fixed, the screw can be passed through the second limiting hole 9 and the first screw hole 8 to fix the cam 6, and this embodiment of the present application does not limit this.

[0078] As an example, the second limiting hole 9 on the rocker arm 10 can be set at an end of the rotating shaft of the rocker arm 10 away from the cam 6, and the area of ​​the second limiting hole 9 can be larger than the cross-sectional area of ​​the screw.

[0079] In one embodiment of the present application, the rocker arm 10 and the abutment surface are respectively located on both sides or ends of the cam 6; specifically, the rocker arm 10 can be on one side of the cam 6, and the abutment surface can be on the other side of the cam 6.

[0080] In one embodiment of the present application, the second limiting hole is an elongated hole, the length of which is perpendicular to the radial direction of the cam. Specifically, the second limiting hole can be an elongated hole, as shown in Figure 3; the length of the elongated hole is perpendicular to the radial direction of the cam. Alternatively, the second limiting hole can be an arc-shaped hole, also perpendicular to the radial direction of the cam, or a larger circular hole.

[0081] In one embodiment of the present application, the first screw hole includes a first sub-screw hole and a second sub-screw hole; when the cam rotates to a first angle, the screw is used to pass through the second limiting hole and the first sub-screw hole; when the cam rotates to a second angle, the screw is used to pass through the second limiting hole and the second sub-screw hole.

[0082] In some feasible embodiments, the first screw hole 8 may include a first sub-screw hole and a second sub-screw hole arranged at different positions of the slider body, as shown in Figure 2a; when the cam is rotated to the first angle, the cam can be fixed based on the first sub-screw hole; specifically, the screw can be passed through the second limiting hole and the first sub-screw hole to fix the cam and the slider body.

[0083] When the cam is rotated to the second angle, the cam can be fixed based on the second sub-screw hole; specifically, a screw can be passed through the second limiting hole and the second sub-screw hole to fix the cam and the slider body.

[0084] Specifically, the direction of the line connecting the two sub-screw holes is perpendicular to the radial direction of the cam. Such a design allows the cam to have a larger angle adjustment range. Furthermore, the first screw hole can include multiple sub-screw holes, and the line connecting the multiple sub-screw holes can be arc-shaped and perpendicular to the radial direction of the cam. Among them, at least one sub-screw hole of the first screw hole is located within the range of the second limiting hole, and because the area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw, the area of ​​the second limiting hole is larger than the area of ​​at least one sub-screw hole of the first screw hole, so that the cam can rotate within a certain range and still be fixed.

[0085] In another embodiment of the present application, the first screw hole itself can also be an arc-shaped screw hole, and the moving path of the arc-shaped screw hole is consistent with that of the second limiting hole; when the cam is rotated, the second limiting hole will also be displaced, and the displaced second limiting hole is still connected to the first screw hole; thus, the screw can be inserted to fix the cam and the slider body.

[0086] In one embodiment of the present application, as shown in Figure 3, an adjustment hole 11 can also be provided on the cam 6, and the adjustment hole is located in an area other than the rotating shaft of the cam; the cam can be rotated through the adjustment hole 11; for example, an adjusting device can be inserted into the adjustment hole 11, and the cam can be rotated by inserting the adjusting device into the adjustment hole 11; the position of the adjustment hole 11 can be set according to actual conditions, and the embodiment of the present application does not limit this.

[0087] It should be noted that the above terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

Claims

1. A guide rail slider for a 3D printer, characterized in that: The guide rail slider comprises: The slider body has a first surface on which a limiting boss is fixedly disposed; A first pulley and a second pulley are arranged on a second surface of the slider body, the first pulley and the second pulley are used to be clamped on both sides of the guide rail, and the second surface is the opposite side of the first surface; A cam is arranged on the first surface of the slider body; the rotation axis of the cam is perpendicular to the first surface, the abutment surface of the cam abuts against the side surface of the limiting boss, and the abutment surface is the circumferential side surface of the cam; A first transmission shaft, one end of which is coaxially connected to the first pulley, the first transmission shaft passes through a first limiting hole on the slider body, the other end of the first transmission shaft is coaxially connected to the cam, the area of ​​the first limiting hole is larger than the cross-sectional area of ​​the first transmission shaft, the direction between the limiting boss and the cam is the same as the direction between the first pulley and the second pulley, and the rotating shaft of the cam moves away from or close to the limiting boss when the cam rotates, so that the first pulley coaxially connected to the cam moves close to or away from the second pulley.

2. The guide rail slider according to claim 1, characterized in that: The first limiting hole is an elongated hole, and a length direction of the elongated hole is in the same direction as a direction between the first pulley and the second pulley.

3. The guide rail slider according to claim 1 or 2, characterized in that: The side surface of the limiting boss for abutting the abutting surface is perpendicular to the first surface.

4. The guide rail slider according to any one of claims 1 to 3, characterized in that: The side surface of the limiting boss for abutting the abutting surface is parallel to the rotating shaft of the cam.

5. The guide rail slider according to any one of claims 1 to 4, characterized in that: The limiting boss is located at a side of the cam away from the second pulley.

6. The guide rail slider according to any one of claims 1 to 5, characterized in that: The guide rail slider further includes: a first limiter, which is detachably connected to the slider body and is used to fix the cam to the slider body to prevent the cam from rotating.

7. The guide rail slider according to claim 6, characterized in that: The first limiting member includes a screw, a rocker arm is provided on one side of the cam, and a second limiting hole is provided on the end of the rocker arm away from the rotating shaft of the cam, and the area of ​​the second limiting hole is larger than the cross-sectional area of ​​the screw; a first screw hole corresponding to the screw is provided on the slider body, and the screw is used to pass through the second limiting hole and the first screw hole to fix the cam by fixing the rocker arm.

8. The guide rail slider according to claim 7, characterized in that: The rocker arm and the abutting surface are respectively located on two sides of the cam.

9. The guide rail slider according to claim 7 or 8, characterized in that: The second limiting hole is an elongated hole, and the length direction of the elongated hole is perpendicular to the radial direction of the cam.

10. The guide rail slider according to any one of claims 7 to 9, characterized in that: The first screw hole includes a first sub-screw hole and a second sub-screw hole; when the cam rotates to a first angle, the screw is used to pass through the second limiting hole and the first sub-screw hole; when the cam rotates to a second angle, the screw is used to pass through the second limiting hole and the second sub-screw hole.

11. A 3D printer, characterized in that: It comprises the guide rail slider, guide rail, printing platform, driving device, and base according to any one of claims 1 to 10; The guide rail slider is connected to the printing platform, the base is fixedly connected to the guide rail, the guide rail is slidably connected to the guide rail slider, and the driving device is used to drive the guide rail slider and the guide rail to generate relative displacement, so as to drive the printing platform and the guide rail to generate relative displacement.

12. A 3D printing system, characterized in that: It comprises a feeding device and a 3D printer as claimed in claim 11; wherein the feeding device is used to provide a material line to the 3D printer.

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