Sliding structure, 3D printer frame and 3D printer

Abstract

Based on the problem that a Z-axis lead screw sliding sleeve in an existing 3D printer is prone to being clamped, the sliding structure, the 3D printer frame and the 3D printer are provided, the sliding structure comprises a rotating piece, a sliding piece and a connecting piece, the rotating piece is provided with a defined rotating axis, and the rotating piece is configured to rotate around the rotating axis in the first direction; the sliding part is arranged on the rotating part in a sliding mode, the sliding part is in transmission connection with the rotating part, the sliding part is configured to slide in the second direction along with rotation of the rotating part, and the second direction is parallel to the direction where the rotating axis is located; the connecting piece is slidably arranged on the rotating piece, and the sliding piece is configured to abut against the connecting piece so that the connecting piece can slide in the second direction; at least a movable gap in the first direction is formed between the connecting piece and the sliding piece, and the movable gap is configured to allow the connecting piece and the sliding piece to move relatively. In this way, the movable gap is formed between the connecting piece and the sliding piece, and the connecting piece and the rotating piece are prevented from being clamped.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a sliding structure, a 3D printer frame, and a 3D printer. Background Art

[0002] Most 3D printers use a Z-axis rotating member structure to achieve the rise and fall of the nozzle assembly. However, when the sliding member connected to the nozzle assembly slides relative to the rotating member, it is easy to get stuck due to parallelism issues of the rotating member or guide rod, affecting the normal operation of the 3D printer. Utility Model Content

[0003] The present application provides a sliding structure, a 3D printer frame, and a 3D printer to solve the problem in the prior art that a sliding member is easily stuck when sliding relative to a rotating member.

[0004] The present application provides a sliding structure, including a rotating member, a sliding member, and a connecting member, the rotating member having a defined rotation axis, and the rotating member being configured to rotate around the rotation axis along a first direction; the sliding member being slidably provided on the rotating member, the sliding member being transmission-connected to the rotating member, and the sliding member being configured to slide along a second direction as the rotating member rotates, the second direction being parallel to the direction of the rotation axis; the connecting member being slidably provided on the rotating member, the sliding member being configured to abut against the connecting member so that the connecting member slides along the second direction; wherein, a movable gap along the first direction is provided at least between the connecting member and the sliding member, and the movable gap is configured to allow the connecting member and the sliding member to move relative to each other.

[0005] In a possible implementation, along the second direction, the rotating member has a first end and a second end that are oppositely disposed, and the sliding member is configured to abut against the connecting member so that the connecting member can slide toward the first end and the second end along the second direction.

[0006] In a possible embodiment, the connecting member includes a first sliding portion and a second sliding portion connected to each other, and the first sliding portion and the second sliding portion can be slidably provided on the rotating member. Along the second direction, the first sliding portion and the second sliding portion are provided on opposite sides of the sliding member, and one end of the sliding member can abut against the first sliding portion, and the other end of the sliding member can abut against the second sliding portion.

[0007] In a possible implementation, along the second direction, a distance between the first sliding portion and the second sliding portion is greater than a length of the sliding member.

[0008] In a possible embodiment, at least two first limiting portions are provided at one end of the sliding member close to the first sliding portion. At least two first limiting portions are spaced apart along the first direction, and a first receiving groove is formed between any two adjacent first limiting portions.

[0009] A first extending portion is provided at one end of the first sliding portion close to the sliding member. The first extending portion is provided in the first receiving groove. Along the first direction, a groove width of the first receiving groove is greater than an extending length of the first extending portion.

[0010] In a possible implementation, along the second direction, an extension length of the first limiting portion is greater than or equal to an extension length of the first extending portion.

[0011] In a possible embodiment, along the first direction, the opposite side surfaces of the first limiting portion are respectively set as the first side surface and the second side surface, and along the first direction, the opposite side surfaces of the first extending portion are respectively arranged parallel to the first side surface and the second side surface.

[0012] In a possible embodiment, at least two second limiting portions are provided at one end of the sliding member close to the second sliding portion. At least two second limiting portions are spaced apart along the first direction, and a second receiving groove is formed between any two adjacent second limiting portions.

[0013] A second extending portion is provided at one end of the second sliding portion close to the sliding member. The second extending portion is provided in the second receiving groove. Along the first direction, the groove width of the second receiving groove is greater than the extending length of the second extending portion.

[0014] In a possible implementation, along the second direction, an extension length of the second limiting portion is greater than or equal to an extension length of the second extending portion.

[0015] In a possible embodiment, along the first direction, the opposite side surfaces of the second limiting portion are respectively set as the third side surface and the fourth side surface, and along the first direction, the opposite side surfaces of the second extending portion are respectively arranged parallel to the third side surface and the fourth side surface.

[0016] In one possible embodiment, a first through-hole is provided on the first sliding portion, a second through-hole is provided on the sliding member, and a third through-hole is provided on the second sliding portion. The first through-hole, the second through-hole, and the third through-hole are coaxially arranged, and the rotating member is sequentially passed through the first through-hole, the second through-hole, and the third through-hole.

[0017] An embodiment of the present application further provides a 3D printer frame, comprising a frame body, a sliding seat, and at least one of the above-mentioned sliding structures, wherein the sliding structure is provided on the frame body, and the sliding seat is connected to a connecting member of the sliding structure.

[0018] An embodiment of the present application further provides a 3D printer, comprising a nozzle assembly and the above-mentioned sliding structure or the above-mentioned 3D printer frame, wherein the nozzle assembly is connected to the sliding seat of the 3D printer frame.

[0019] The sliding structure of the present application rotates the rotating member to drive the sliding member to slide along the rotating member. During the sliding process, the sliding member abuts the connecting member to drive the connecting member to slide synchronously, so that the rotating member does not directly drive the connecting member to slide, thereby preventing the connecting member and the rotating member from getting stuck. In addition, a movable gap is reserved between the connecting member and the sliding member to allow the connecting member and the sliding member to move relative to each other, further preventing the connecting member and the rotating member from getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is a structural diagram of a sliding structure of the present application in one embodiment.

[0021] Figure 2 FIG. 1 is an exploded schematic diagram of the sliding structure of the present application in one embodiment.

[0022] Figure 3 FIG. 1 is an exploded schematic diagram of another perspective of an embodiment of the sliding structure of the present application.

[0023] Figure 4 for Figure 1 Schematic cross-sectional view of the sliding structure along the IV-IV direction.

[0024] Figure 5 FIG. 1 is a schematic structural diagram of a 3D printer frame according to an embodiment of the present application.

[0025] Figure 6 FIG. 1 is a schematic structural diagram of a 3D printer according to an embodiment of the present invention.

[0026] Description of main component symbols:

[0027] 3D Printer 300

[0028] 3D Printer Rack 200

[0029] Sliding structure 100

[0030] The first direction S

[0031] The second direction Z

[0032] Rotation axis H

[0033] First side surface P1

[0034] Second side P2

[0035] The third side P3

[0036] Fourth side P4

[0037] Rotating member 10

[0038] First end 11

[0039] Second end 12

[0040] Slider 20

[0041] Second perforation 201

[0042] The first limiting portion 21

[0043] The second limiting portion 22

[0044] First receiving groove 23

[0045] Second receiving slot 24

[0046] Connector 30

[0047] First sliding portion 31

[0048] First through hole 310

[0049] First extension portion 311

[0050] Second sliding portion 32

[0051] The third perforation 320

[0052] Second extension portion 321

[0053] Connecting portion 33

[0054] Activity interval 40

[0055] Frame body 50

[0056] Sliding seat 60

[0057] Nozzle assembly 70

[0058] The following specific implementation methods will further illustrate this application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0059] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Like reference numerals represent identical or similar components.

[0060] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0061] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0062] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0063] like Figures 1 to 3 As shown, this embodiment provides a sliding structure 100 , which includes a rotating member 10 , a sliding member 20 , and a connecting member 30 .

[0064] The rotating member 10 has a defined rotation axis H and is configured to rotate about the rotation axis H in a first direction S. The sliding member 20 is slidably disposed on the rotating member 10, is transmission-connected to the rotating member 10, and is configured to slide in a second direction Z as the rotating member 10 rotates. The second direction Z is parallel to the direction of the rotation axis H. The connecting member 30 is slidably disposed on the rotating member 10. The sliding member 20 is configured to abut the connecting member 30. During the sliding process of the sliding member 20, the sliding member 20 abuts the connecting member 30, allowing the connecting member 30 to slide relative to the rotating member 10 in the second direction Z. A movable gap 40 is defined between the connecting member 30 and the sliding member 20 along at least the first direction S. The movable gap 40 is configured to allow the connecting member 30 and the sliding member 20 to move relative to each other.

[0065] It is worth noting that Figure 1The first direction S shown in FIG is counterclockwise, which is just to illustrate a rotation state of the rotating member 10. In other embodiments, the rotating member 10 can also rotate in the clockwise direction, and the first direction S can also be Figure 1 The direction is opposite to the direction shown in (i.e., clockwise).

[0066] Thus, the sliding structure 100 of the present application drives the sliding member 20 to slide along the rotating member 10 by rotating the rotating member 10. During the sliding process, the sliding member 20 abuts against the connecting member 30, driving the connecting member 30 to slide synchronously, so that the rotating member 10 does not directly drive the connecting member 30 to slide, thereby preventing the connecting member 30 from getting stuck with the rotating member 10. In addition, a movable gap 40 is reserved between the connecting member 30 and the sliding member 20, allowing the connecting member 30 and the sliding member 20 to move relative to each other, further preventing the connecting member 30 from getting stuck with the rotating member 10.

[0067] Please combine again Figures 1 to 3 In one embodiment, the rotating member 10 is a screw having a cylindrical shape. The sliding member 20 is a screw sleeve and is used in conjunction with the screw to form a linear reciprocating mechanism.

[0068] The sliding member 20 is cylindrical in shape and is provided with a second through-hole 201. Along the second direction Z, the second through-hole 201 extends from the center of the end surface of one end of the sliding member 20 to the end surface of the other end of the sliding member 20, thereby penetrating the sliding member 20. The rotating member 10 is provided through the second through-hole 201, and the inner wall of the sliding member 20 is provided with an internal thread, and the outer peripheral surface of the rotating member 10 is provided with an external thread. The external thread and the internal thread are mated to achieve threaded mating of the sliding member 20 and the rotating member 10, so that the sliding member 20 and the rotating member 10 constitute a screw linear lifting mechanism. The rotation of the rotating member 10 and the threaded mating structure between the rotating member 10 and the sliding member 20 provide a driving force along the second direction Z to the sliding member 20, thereby pushing the sliding member 20 to slide relative to the rotating member 10 along the second direction Z.

[0069] It is understandable that in other embodiments, the shape of the sliding member 20 may also be other shapes such as a quadrangular prism, and the specific shape of the sliding member 20 may be adaptively selected according to actual design requirements.

[0070] Please combine again Figures 1 to 4 In one embodiment, the rotating member 10 has a first end 11 and a second end 12 that are oppositely disposed along the second direction Z. The sliding member 20 is configured to abut against the connecting member 30, so that the connecting member 30 can slide along the second direction Z toward the first end 11 and the second end 12. As a result, the connecting member 30 slides upward or downward along the second direction Z under the abutment of the sliding member 20, thereby completing the lifting action of the connecting member 30.

[0071] In this embodiment, the connector 30 includes a first sliding portion 31 and a second sliding portion 32 connected to each other. The first sliding portion 31 and the second sliding portion 32 are spaced apart along the second direction Z to form a receiving space therebetween for accommodating the slider 20 .

[0072] Furthermore, the connector 30 includes a connecting portion 33. The connecting portion 33 is arranged along the second direction Z. One end of the connecting portion 33 is connected to the outer circumference of the first sliding portion 31, and the other end of the connecting portion 33 is connected to the outer circumference of the second sliding portion 32. The connecting portion 33 is integrally formed with the first sliding portion 31 and the second sliding portion 32.

[0073] It is understandable that in other embodiments, the connecting portion 33 and the first sliding portion 31 and the second sliding portion 32 can also be detachably connected by fasteners such as screws to facilitate replacement of any one of the connecting portion 33, the first sliding portion 31, and the second sliding portion 32.

[0074] In this embodiment, both the first sliding portion 31 and the second sliding portion 32 are slidably disposed on the rotating member 10. A first through-hole 310 is defined in the first sliding portion 31, and a third through-hole 320 is defined in the second sliding portion 32. Along the second direction Z, the first through-hole 310 extends through the first sliding portion 31, and the third through-hole 320 extends through the second sliding portion 32. The first through-hole 310, the second through-hole 201, and the third through-hole 320 are coaxially disposed, and the rotating member 10 is sequentially penetrated through the first through-hole 310, the second through-hole 201, and the third through-hole 320.

[0075] The inner walls of the first through hole 310 and the third through hole 320 are not provided with internal threads, so that the first sliding portion 31 and the second sliding portion 32 can slide freely along the rotating member 10 .

[0076] Along the second direction Z, the first sliding portion 31 and the second sliding portion 32 are respectively disposed on opposite sides of the sliding member 20 . One end of the sliding member 20 can abut against the first sliding portion 31 , and the other end of the sliding member 20 can abut against the second sliding portion 32 .

[0077] In particular, along the second direction Z, the distance between the first sliding portion 31 and the second sliding portion 32 is greater than the length of the sliding member 20 , so as to prevent the sliding member 20 and the connecting member 30 from being stuck in the second direction Z.

[0078] In this embodiment, the second direction Z is parallel to the direction of gravity, that is, the rotating member 10 is placed vertically.

[0079] Thus, when the slider 20 slides upward in the second direction Z, the top end of the slider 20 abuts the first sliding portion 31 and pushes the first sliding portion 31 to slide synchronously, thereby achieving upward movement of the connecting member 30 in the second direction Z. When the slider 20 stops sliding, the first sliding portion 31 abuts the top end of the slider 20 under the action of gravity, thereby limiting the position of the slider 20. When the slider 20 slides downward in the second direction Z, the bottom end of the slider 20 abuts the second sliding portion 32 and pushes the second sliding portion 32 to slide synchronously, thereby achieving synchronous downward movement of the connecting member 30 along with the slider 20 in the second direction Z.

[0080] It is understood that in other embodiments, the second direction Z can also be set perpendicular to the direction of gravity, that is, the rotating member 10 is placed horizontally. In this case, the connecting member 30 will not slide relative to the rotating member 10 along the second direction Z due to gravity, and the sliding member 20 must abut the connecting member 30 to push the connecting member 30 to slide synchronously.

[0081] Please combine again Figures 1 to 4 In one embodiment, at least two first stoppers 21 are provided at the end of the slider 20 proximate the first sliding portion 31. The cross-section of the first stoppers 21 is arc-shaped, and the shape of the first stoppers 21 matches the shape of the slider 20. Along the second direction Z, the first stoppers 21 extend from the end surface of the slider 20 proximate the first sliding portion 31 toward the first sliding portion 31. Along the first direction S, at least two first stoppers 21 are spaced apart, and a first receiving groove 23 is formed between any two adjacent first stoppers 21. The first receiving groove 23 is arc-shaped.

[0082] A first extension portion 311 is provided at the end of the first sliding portion 31 proximal to the sliding member 20. The cross-section of the first extension portion 311 is arc-shaped, and the shape of the first extension portion 311 matches that of the first sliding portion 31. Along the second direction Z, the first extension portion 311 extends from the end surface of the first sliding portion 31 proximal to the sliding member 20 toward the sliding member 20. The first extension portion 311 is disposed within the first receiving groove 23. Along the first direction S, the width of the first receiving groove 23 is greater than the extension length of the first extension portion 311. When the first extension portion 311 is received in the first receiving groove 23, a movable gap 40 exists between the opposing sides of the first extension portion 311 and two adjacent first limiting portions 21 along the first direction S. This movable gap 40 allows the connector 30 to rotate slightly relative to the sliding member 20 along the first direction S to prevent the two from becoming stuck.

[0083] Furthermore, when the first extension portion 311 is received in the first receiving groove 23 , the two adjacent first limiting portions 21 of the first extension portion 311 can limit the first extension portion 311 , thereby preventing the first sliding portion 31 from rotating too much relative to the rotating member 10 .

[0084] In this embodiment, there are four first position-limiting portions 21, which are equally spaced around the rotation axis H and form four first receiving grooves 23. There are two first extension portions 311, each corresponding to an arc center angle of 180°. The two first extension portions 311 are respectively disposed within two non-adjacent first receiving grooves 23. The provision of two first extension portions 311 improves the stability between the first sliding portion 31 and the sliding member 20.

[0085] It is understandable that, in other embodiments, the number of the first limiting portions 21 and the first extending portions 311 can be selected according to actual design requirements.

[0086] Furthermore, along the second direction Z, the extension length of the first limiting portion 21 is greater than or equal to the extension length of the first extension portion 311, so as to ensure that the first limiting portion 21 can extend into the first receiving groove 23 and then abut against the bottom end surface of the first sliding portion 31, thereby pushing the first sliding portion 31 to slide through the sliding member 20.

[0087] Along the first direction S, the opposite side surfaces of the first limiting portion 21 are respectively set as the first side surface P1 and the second side surface P2. Along the first direction S, the opposite side surfaces of the first extension portion 311 are respectively set parallel to the first side surface P1 and the second side surface P2, so that when the first extension portion 311 is in contact with the two adjacent first limiting portions 21, the two can fit tightly together.

[0088] In this embodiment, the first limiting portion 21 is fan-shaped, and the first side surface P1 and the second side surface P2 are arranged at an angle, and the angle between the first side surface P1 and the second side surface P2 is an acute angle.

[0089] Please combine again Figures 1 to 4 In one embodiment, at least two second stoppers 22 are provided at one end of the sliding member 20 near the second sliding portion 32. The at least two second stoppers 22 are spaced apart along the first direction S, with a second receiving groove 24 formed between any two adjacent second stoppers 22. A second extension 321 is provided at one end of the second sliding portion 32 near the sliding member 20. The second extension 321 is disposed within the second receiving groove 24. Along the first direction S, the width of the second receiving groove 24 is greater than the extension length of the second extension 321.

[0090] Along the second direction Z, the extension length of the second limiting portion 22 is greater than or equal to the extension length of the second extending portion 321, ensuring that the second limiting portion 22 can extend into the second receiving groove 24 and abut against the top surface of the second sliding portion 32, thereby pushing the second sliding portion 32 to slide via the sliding member 20. Along the first direction S, the opposite side surfaces of the second limiting portion 22 are respectively defined as the third side surface P3 and the fourth side surface P4. Along the first direction S, the opposite side surfaces of the second extending portion 321 are respectively parallel to the third side surface P3 and the fourth side surface P4.

[0091] In this embodiment, the second limiting portion 22 is fan-shaped, and the third side surface P3 and the fourth side surface P4 are arranged at an angle, and the angle between the third side surface P3 and the fourth side surface P4 is an acute angle.

[0092] It should be noted that, in this embodiment, the structure and principle of the second limiting portion 22 and the second extending portion 321 are the same as those of the first limiting portion 21 and the first extending portion 311 , and thus are not described in detail.

[0093] It can be understood that in other embodiments, only the first limiting portion 21 is provided on the sliding member 20 and only the first extension portion 311 is provided on the connecting member 30, and the limiting and movable gap 40 between the sliding member 20 and the connecting member 30 are formed only by the cooperation of the first limiting portion 21 and the first extension portion 311.

[0094] It can be understood that in other embodiments, only the second limiting portion 22 is provided on the sliding member 20 and only the second extension portion 321 is provided on the connecting member 30, and the limiting and movable gap 40 between the sliding member 20 and the connecting member 30 are formed only by the cooperation of the second limiting portion 22 and the second extension portion 321.

[0095] It is understandable that in other embodiments, the shape or quantity of the second limiting portion 22 and the second extending portion 321 is different from the shape or quantity of the first limiting portion 21 and the first extending portion 311, and can be selected according to actual design requirements.

[0096] like Figure 5 As shown, combined with Figure 1 This embodiment further provides a 3D printer frame 200, comprising a frame body 50, a sliding seat 60, and at least one of the above-mentioned sliding structures 100. The sliding structure 100 is provided on the frame body 50, and the sliding seat 60 is connected to the connecting member 30 of the sliding structure 100.

[0097] There are two sliding structures 100, which are spaced apart from each other. The rotating members 10 of the two sliding structures 100 are rotatably mounted on the frame body 50. The sliding base 60 is located between the two sliding structures 100, and the two ends of the sliding base 60 are respectively connected to the connecting portions 33 of the two sliding structures 100.

[0098] The connection between the sliding seat 60 and the connecting portion 33 can be achieved by fasteners such as screws.

[0099] It is understood that in other embodiments, only one sliding structure 100 may be provided, and the 3D printer frame 200 may further include a guide assembly (not shown) that is parallel to and spaced apart from the sliding structure 100. The sliding seat 60 is located between the guide assembly and the sliding structure 100, with one end of the sliding seat 60 connected to the connecting portion 33 of the sliding structure 100 and the other end slidably connected to the guide assembly.

[0100] like Figure 6 As shown, combined with Figure 1 and Figure 5 This embodiment further provides a 3D printer 300, including a nozzle assembly 70 and the above-mentioned 3D printer frame 200, wherein the nozzle assembly 70 is connected to the sliding seat 60 of the 3D printer frame 200, so as to drive the nozzle assembly 70 to move along the second direction Z through the sliding seat 60.

[0101] It is understandable that the 3D printer 300 also includes other mechanisms required in the 3D printing process.

[0102] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. A sliding structure, characterized in that: include: a rotating member having a defined rotation axis, wherein the rotating member is configured to rotate about the rotation axis in a first direction; a sliding member slidably disposed on the rotating member, the sliding member being transmission-connected to the rotating member and configured to slide along a second direction as the rotating member rotates, the second direction being parallel to a direction of the rotation axis; a connecting member slidably disposed on the rotating member, wherein the sliding member is configured to abut against the connecting member so that the connecting member slides along the second direction; Therein, a movable gap is provided between the connecting member and the sliding member at least along the first direction, and the movable gap is configured to allow the connecting member and the sliding member to move relative to each other.

2. The sliding structure according to claim 1, wherein: Along the second direction, the rotating member has a first end and a second end that are oppositely disposed, and the sliding member is configured to abut against the connecting member so that the connecting member can slide toward the first end and the second end along the second direction.

3. The sliding structure according to claim 2, wherein: The connecting member includes a first sliding portion and a second sliding portion connected to each other, and the first sliding portion and the second sliding portion can be slidably arranged on the rotating member. Along the second direction, the first sliding portion and the second sliding portion are arranged on opposite sides of the sliding member, and one end of the sliding member can abut against the first sliding portion, and the other end of the sliding member can abut against the second sliding portion.

4. The sliding structure according to claim 3, wherein: Along the second direction, a distance between the first sliding portion and the second sliding portion is greater than a length of the sliding member.

5. The sliding structure according to claim 3, wherein: At least two first limiting portions are provided at one end of the sliding member close to the first sliding portion. At least two first limiting portions are spaced apart along the first direction, and a first receiving groove is formed between any two adjacent first limiting portions. A first extending portion is provided at one end of the first sliding portion close to the sliding member. The first extending portion is provided in the first receiving groove. Along the first direction, a groove width of the first receiving groove is greater than an extending length of the first extending portion.

6. The sliding structure according to claim 5, wherein: Along the second direction, an extending length of the first limiting portion is greater than or equal to an extending length of the first extending portion.

7. The sliding structure according to claim 5, wherein: Along the first direction, opposite side surfaces of the first limiting portion are respectively set as a first side surface and a second side surface. Along the first direction, opposite side surfaces of the first extending portion are respectively arranged parallel to the first side surface and the second side surface.

8. The sliding structure according to claim 3, wherein: At least two second limiting portions are provided at one end of the sliding member close to the second sliding portion. At least two second limiting portions are spaced apart along the first direction, and a second receiving groove is formed between any two adjacent second limiting portions. A second extending portion is provided at one end of the second sliding portion close to the sliding member. The second extending portion is provided in the second receiving groove. Along the first direction, the groove width of the second receiving groove is greater than the extending length of the second extending portion.

9. The sliding structure according to claim 8, wherein: Along the second direction, an extending length of the second limiting portion is greater than or equal to an extending length of the second extending portion.

10. The sliding structure according to claim 8, wherein: Along the first direction, opposite side surfaces of the second limiting portion are respectively set as a third side surface and a fourth side surface. Along the first direction, opposite side surfaces of the second extending portion are respectively arranged parallel to the third side surface and the fourth side surface.

11. The sliding structure according to claim 3, wherein: The first sliding part is provided with a first through-hole, the sliding member is provided with a second through-hole, and the second sliding part is provided with a third through-hole. The first through-hole, the second through-hole, and the third through-hole are coaxially arranged, and the rotating member is sequentially passed through the first through-hole, the second through-hole, and the third through-hole.

12. A 3D printer frame, characterized in that: The invention comprises a frame body, a sliding seat, and at least one sliding structure according to any one of claims 1 to 11, wherein the sliding structure is arranged on the frame body, and the sliding seat is connected to a connecting piece of the sliding structure.

13. A 3D printer, characterized in that: The device comprises a nozzle assembly and a sliding structure according to any one of claims 1 to 11 or a 3D printer frame according to claim 12, wherein the nozzle assembly is connected to a sliding seat of the 3D printer frame.

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