Supporting frame and 3D printing equipment

Abstract

The invention relates to the technical field of concrete 3D printing equipment, and particularly discloses a supporting frame and 3D printing equipment, the supporting frame comprises a supporting frame body and a jacking part, the supporting frame body is formed by sequentially and movably connecting a plurality of telescopic frames in the vertical direction, and the telescopic frame at the topmost end of the supporting frame and the jacking part are both connected to the bottom end of an external cantilever structure. When the height of the 3D printing equipment needs to be adjusted, the supporting frame body is driven to stretch out and draw back through stretching out and drawing back of the jacking part, and then the overhanging structure above and the 3D printing head installed at one end of the overhanging structure are driven to move in the vertical direction, so that height adjustment is achieved; according to the concrete 3D printing equipment, a lifting structure does not need to be additionally arranged between one end of the cantilever structure and the 3D printing head, the structure of the concrete 3D printing equipment is simplified, meanwhile, contraction of the concrete 3D printing equipment is achieved, transportation is convenient, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete 3D printing equipment, and in particular to a support frame and 3D printing equipment. Background Art

[0002] Concrete 3D printing equipment used at construction sites usually needs to be equipped with a structure to adjust its own height in order to meet the requirements of different working conditions. Concrete 3D printing equipment usually includes a cantilever structure, a support frame and a 3D printing head. When adjusting the height of existing concrete 3D printing equipment, a guide rail lifting structure with a gear rack is usually used between one end of the cantilever structure and the 3D printing head to achieve the height adjustment of the 3D printing head. However, the guide rail lifting structure has a large deadweight and cannot be retracted, and the transportation cost at the construction site is high, which reduces the working efficiency of the concrete 3D printing equipment. Summary of the invention

[0003] The main purpose of the present invention is to propose a support frame and a 3D printing device, aiming to solve the problem that the height adjustment structure of the existing concrete 3D printing device is relatively complex, resulting in difficulty in transporting the concrete 3D printing device.

[0004] In order to solve the above problems, the present invention provides a support frame, comprising:

[0005] A support frame body, the support frame body comprising a plurality of telescopic frames, the plurality of telescopic frames being movably connected in sequence along the vertical direction, so that the support frame body has a retracted state and an expanded state, and the telescopic frame at the top end of the support frame is connected to an external cantilever structure;

[0006] A lifting member, one end of which is mounted on the horizontal mounting surface of the support frame, and the other end is used to connect with the cantilever structure, and the lifting member drives the cantilever structure to move in the vertical direction to drive the support frame body to switch between the retracted state and the expanded state.

[0007] In one embodiment, the support frame also includes a first rolling member, which is installed at one end of each telescopic frame. The telescopic frame has a first sliding groove on the inner side in the vertical direction, and the first rolling member of one telescopic frame is slidably arranged in the first sliding groove of an adjacent telescopic frame.

[0008] In one embodiment, the support frame also includes an adjustment component, which includes a driving member and a film pressure sensor. The driving member is installed at one end of each telescopic frame and is drivingly connected to the first rolling member. The film pressure sensor is attached to an inner groove wall of the slide groove. The driving member of one telescopic frame drives the first rolling member to abut against the film pressure sensor in the adjacent telescopic frame.

[0009] In one embodiment, the driving member includes a driving motor, a screw rod and a slider, the driving motor is drivingly connected to the screw rod, the screw rod is inserted into the slider, and the slider is fixedly connected to the first rolling member.

[0010] In one embodiment, the support frame also includes a second rolling member, which is installed at the other end of each telescopic frame and is located on the inner and outer sides of the telescopic frame respectively with the first rolling member. The telescopic frame is provided with a second sliding groove on the outer side in the vertical direction, and the second rolling member of one telescopic frame is slidably arranged in the second sliding groove of the adjacent telescopic frame.

[0011] In one embodiment, the support frame includes a plurality of the first rolling members, a plurality of the second rolling members and a plurality of the sensor components, the telescopic frame has a plurality of the first sliding grooves and a plurality of the second sliding grooves correspondingly opened in the circumference, one of the sensor components is connected to one of the rolling members, one of the first rolling members is slidably disposed in one of the first sliding grooves, and one of the second rolling members is slidably disposed in one of the second sliding grooves.

[0012] In one embodiment, the telescopic frame includes a first limit member and a stop member, and the first limit member and the stop member are respectively arranged at both ends of each telescopic frame. When the support frame body is in the unfolded state, the first limit member of one telescopic frame abuts against the stop member of another adjacent telescopic frame.

[0013] In one embodiment, the telescopic frame further includes a second limit member, which is fixedly mounted on the outer side of the top end of each telescopic frame. When the telescopic structure is in a retracted state, the second limit member of one telescopic frame abuts against the second limit member of another adjacent telescopic frame.

[0014] In one embodiment, the telescopic frame further comprises a plurality of transverse beams and a plurality of diagonal beams, wherein the plurality of transverse beams are arranged at intervals on the frame surface of the telescopic frame, and one diagonal beam is obliquely arranged between two transverse beams;

[0015] And / or, the lifting member is installed in the support frame body.

[0016] The present invention also proposes a 3D printing device, which includes a cantilever structure, a support frame and a 3D print head. The support frame is the support frame as described above, the cantilever structure is installed at the top of the support frame, and the 3D print head is installed at one end of the cantilever structure away from the support frame.

[0017] The present invention provides a support frame, comprising a support frame body and a lifting member, wherein the support frame body comprises a plurality of telescopic frames, and the plurality of telescopic frames are movably connected in sequence along the vertical direction. When the height of the 3D printing device needs to be adjusted, the support frame body is driven to be extended and retracted by the extension of the lifting member itself, thereby driving the cantilever structure above and the 3D printing head installed at one end of the cantilever structure to move in the vertical direction, thereby achieving height adjustment, without the need to additionally set a lifting structure between one end of the cantilever structure and the 3D printing head, thereby simplifying the structure of the concrete 3D printing device itself, and realizing the contraction of the concrete 3D printing device, facilitating transportation, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a support frame of the present invention;

[0020] Figure 2 for Figure 1 The enlarged exploded view of the connection node structure at A in the middle;

[0021] Figure 3 for Figure 2 A structural diagram of another perspective of connecting nodes;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the middle support frame in a contracted state;

[0023] Figure 5 It is a structural schematic diagram of an embodiment of a 3D printing device of the present invention.

[0024] Description of Figure Numbers:

[0025]

[0026]

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Concrete 3D printing equipment used on construction sites usually needs to be equipped with a structure to adjust its own height in order to meet the requirements of different working conditions. Concrete 3D printing equipment usually includes a cantilever structure, a support frame and a 3D printing head. When adjusting the height of existing concrete 3D printing equipment, a guide rail lifting structure with a gear rack is usually used between one end of the cantilever structure and the 3D printing head to achieve the height adjustment of the 3D printing head. However, the guide rail lifting structure has a large deadweight and cannot be retracted. This method requires an additional lifting structure to be set at the connection between the cantilever structure and the 3D printing head, which increases the deadweight of the printing equipment, resulting in higher transportation costs at the construction site, thereby reducing the working efficiency of the concrete 3D printing equipment.

[0032] In order to solve the above problems, the present invention proposes a support frame and a 3D printing device, aiming to solve the problem that the height adjustment structure of the existing concrete 3D printing device is relatively complex, resulting in difficulty in transporting the concrete 3D printing device.

[0033] like Figure 1 and Figure 4In one embodiment, the support frame 10 includes a support frame 10 body and a lifting member 12. The support frame 10 body includes a plurality of telescopic frames 111. The plurality of telescopic frames 111 are movably connected in sequence along the vertical direction so that the support frame 10 body has a retracted state and an expanded state. The topmost telescopic frame 111 of the support frame 10 is connected to the external cantilever structure 20. One end of the lifting member 12 is installed on the horizontal mounting surface of the support frame 10, and the other end is used to connect to the cantilever structure 20. The lifting member 12 drives the cantilever structure 20 to move in the vertical direction to drive the support frame 10 body to switch between the retracted state and the expanded state.

[0034] In this embodiment, the support frame 10 drives the cantilever structure 20 connected to the top of the jacking member 12 to change its vertical height through the telescopic movement of the jacking member 12 itself in the vertical direction, thereby realizing the height adjustment of the 3D printing head 30 connected to one end of the cantilever structure 20. At the same time, the support frame 10 also includes a support frame 10 body formed by a plurality of telescopic frames 111 movably connected in the vertical direction. The support frame 10 body is connected below the cantilever structure 20. When the jacking member 12 drives the cantilever structure 20 to move in the vertical direction through its own telescopic movement, the support frame 10 body is telescoped by sliding between the plurality of telescopic frames 111. The setting of the support frame 10 body increases the contact area between the support frame 10 and the cantilever structure 20, improves the stability of the support frame 10 during telescopic movement, and thereby improves the practicality of the support frame 10.

[0035] Specifically, the lifting member 12 can be an electric cylinder, which mainly includes a motor, a transmission gear and a screw rod. In this embodiment, one end of the screw rod is connected to the motor drive through the transmission gear, and the other end is connected to the cantilever structure 20 in the vertical direction. The electric cylinder converts the rotation of the motor into the reciprocating linear motion of the screw rod through the transmission gear, thereby driving the cantilever structure 20 to adjust the height. Its structure is simple and can achieve precise displacement control to meet the precise height control of the 3D printing device 100. The volume of the multiple telescopic frames 111 increases in sequence along the direction of the support frame 10 to improve the telescopic smoothness between the two adjacent telescopic frames 111, while maintaining the structural stability of the main body of the support frame 10, so that the support frame 10 can adapt to the needs of different heights and different working conditions. At the same time, the main body of the support frame 10 is made of H100 steel, which realizes a lightweight design while meeting the telescopic strength, reduces the dead weight, reduces the production cost, and improves the transportation efficiency, thereby improving the practicality of the 3D printing device 100. In addition, the main body of the support frame 10 and the end of the lifting member 12 away from the cantilever structure 20 are located in the same horizontal plane, ensuring the telescopic synchronization between the two, and further improving the telescopic stability of the support frame 10.

[0036] The present invention provides a support frame 10, including a support frame 10 body and a lifting member 12, wherein the support frame 10 body includes a plurality of telescopic frames 111, and the plurality of telescopic frames 111 are movably connected in sequence along the vertical direction. When the height of the 3D printing device 100 needs to be adjusted, the lifting member 12 itself is extended and retracted to drive the support frame 10 body to be synchronously extended and retracted, thereby driving the cantilever structure 20 above and the 3D printing head 30 installed at one end of the cantilever structure 20 to move in the vertical direction, thereby achieving height adjustment. In the retracted state, the volume of the support frame 10 body is small, which is convenient for transporting the 3D printing device 100; and in the expanded state, the support frame 10 body can provide a larger support area to ensure the structural stability of the support frame 10 during the extension and retraction process. The setting of the support frame 10 simplifies the structure of the concrete 3D printing device 100 itself, and at the same time realizes the contraction of the concrete 3D printing device 100, which is convenient for transportation and improves work efficiency.

[0037] like Figures 1 to 3 In one embodiment, the support frame 10 also includes a first rolling member 13, which is installed at one end of each telescopic frame 111. The telescopic frame 111 is provided with a first sliding groove 1111 on the inner side in the vertical direction. The first rolling member 13 of one telescopic frame 111 is slidably arranged in the first sliding groove 1111 of the adjacent telescopic frame 111.

[0038] In this embodiment, in order to improve the convenience and stability of the operation of the support frame 10, a first rolling member 13 is also installed at one end of the telescopic frame 111. The first rolling member 13 is a high-precision bearing. The installation method between the two can be bolted or nut connected, which ensures that the two are installed stably and are easy to disassemble, and is convenient for maintenance and replacement of the first rolling member 13. At the same time, the inner side of the telescopic frame 111 is provided with a first slide groove 1111 in the vertical direction. The first rolling member 13 of a telescopic frame 111 rolls in the slide groove of the adjacent telescopic frame 111, which reduces the direct contact between the adjacent telescopic frames 111, thereby reducing wear and extending the service life of the support frame 10, and significantly reducing the friction between the adjacent telescopic frames 111, making the telescopic operation of the support frame 10 easier, so that the support frame 10 can quickly adjust its height according to actual needs.

[0039] like Figures 1 to 3 In one embodiment, the support frame 10 also includes an adjustment component 14, which includes a driving member 141 and a film pressure sensor 142. The driving member 141 is installed at one end of each telescopic frame 111 and is drivingly connected to the first rolling member 13. The film pressure sensor 142 is attached to an inner groove wall of the slide groove. The driving member 141 of a telescopic frame 111 drives the first rolling member 13 to abut against the film pressure sensor 142 in the adjacent telescopic frame 111.

[0040] When the main body of the support frame 10 includes a large number of telescopic frames 111 , the telescopic frames 111 closer to the cantilever structure 20 are more likely to shake during telescoping, thereby reducing the structural stability of the support frame 10 . Therefore, in this embodiment, the support frame 10 is additionally provided with an adjustment component 14, which includes a driving member 141 and a film pressure sensor 142. The driving member 141 is fixedly connected to the first rolling member 13, and the film pressure sensor 142 is a strip structure, which is mounted on the inner groove wall of the slide groove abutting the first rolling member 13. When the first rolling member 13 slides in the slide groove, the film pressure sensor 142 transmits the pressure value between itself and the first rolling member 13 to the external control component. When a certain gap appears between the first rolling member 13 and the inner groove wall of the slide groove, the pressure value between the film pressure sensor 142 and the first rolling member 13 decreases. At this time, the external control component drives the driving member 141 to drive the first rolling member 13 to move toward the direction close to the inner groove wall of the slide groove, ensuring the close contact between the two, reducing the shaking of the adjacent telescopic frame 111 during the telescopic process, and thereby improving the telescopic stability of the support frame 10.

[0041] Further, the driving member 141 includes a driving motor 1411, a screw 1412 and a slider 1413, wherein the driving motor 1411 is drivingly connected to the screw 1412, the screw 1412 is plugged into the slider 1413, and the slider 1413 is fixedly connected to the first rolling member 13. When the driving motor 1411 starts to work, the screw 1412 converts the rotation of the motor into linear motion through its own structural design, and then drives the first rolling member 13 to perform linear motion in a direction perpendicular to the length of the chute through the slider 1413. In this example, through the precise control of the driving motor 1411, it is ensured that the first rolling member 13 is always in close contact with the inner groove wall of the chute, and the design of the screw 1412 and the slider 1413 ensures the stability of the movement of the first rolling member 13 during the adjustment process, reduces the impact and vibration between the first rolling member 13 and the chute, and at the same time, the combined structure of the driving motor 1411, the screw 1412 and the slider 1413 is relatively simple, easy to inspect and maintain, and improves the practicality of the support frame 10.

[0042] like Figures 1 to 3 In one embodiment, the support frame 10 also includes a second rolling member 15, which is installed at the other end of each telescopic frame 111, and is located on the inner and outer sides of the telescopic frame 111 respectively with the first rolling member 13. The telescopic frame 111 is provided with a second sliding groove 1112 on the outer side in the vertical direction, and the second rolling member 15 of one telescopic frame 111 is slidably arranged in the second sliding groove 1112 of the adjacent telescopic frame 111.

[0043] In this embodiment, when two adjacent telescopic frames 111 are connected, the inner side of one telescopic frame 111 is opposite to the outer side of the other telescopic frame 111, and thus the first slide groove 1111 opened on the inner side of one telescopic frame 111 is also opposite to the second slide groove 1112 opened on the outer side of the other telescopic frame 111. When the two adjacent telescopic frames 111 are telescoped, the first rolling element 13 on one telescopic frame 111 abuts against the groove side wall of the first slide groove 1111 of the other telescopic frame 111. At the same time, the second rolling element 15 on the other telescopic frame 111 abuts against the groove side wall of the second slide groove 1112 of the one telescopic frame 111, thereby realizing bidirectional fixation between the two telescopic frames 111, further avoiding the shaking generated during the telescopic process, and improving the structural stability of the support frame 10.

[0044] Furthermore, since each telescopic frame 111 includes four vertical support rods, two adjacent telescopic frames 111 are connected in pairs through eight support rods. Figures 1 to 3 In one embodiment, the support frame 10 includes a plurality of first rolling elements 13, a plurality of second rolling elements 15 and a plurality of sensor components. The telescopic frame 111 has a plurality of first slide grooves 1111 and the second slide grooves 1112 correspondingly arranged in the circumferential direction. A sensor component is connected to a rolling element. A first rolling element 13 is slidably disposed in a first slide groove 1111, and a second rolling element 15 is slidably disposed in a second slide groove 1112.

[0045] In this embodiment, each group of two corresponding support rods is provided with the first rolling element 13, the second rolling element 15 and the sensor assembly in the above embodiment, and at the same time, the first slide groove 1111 and the second slide groove 1112 are respectively opened on both sides of the support rod, and the connection method in the above embodiment is adopted between each group of two corresponding support rods, thereby realizing multi-directional fixation between two adjacent telescopic frames 111, and greatly improving the telescopic stability of the support frame 10.

[0046] like Figure 1 and Figure 2 In one embodiment, the telescopic frame 111 includes a first limit member 1113 and a stop member 1114, which are respectively arranged at both ends of each telescopic frame 111. When the main body of the support frame 10 is in the unfolded state, the first limit member 1113 of a telescopic frame 111 abuts against the stop member 1114 of another adjacent telescopic frame 111.

[0047] In this embodiment, in order to ensure the stability and safety of the support frame 10 in the unfolded state, a first stopper 1113 and a stopper 1114 are respectively provided at both ends of each telescopic frame 111. The first stopper 1113 and the stopper 1114 are two block structures with matching shapes and sizes to ensure that they can be firmly abutted. When the support frame 10 is converted from the retracted state to the unfolded state, each telescopic frame 111 is extended in sequence until it reaches a preset unfolded position. When the support frame 10 is fully unfolded, the first stopper 1113 of a telescopic frame 111 will be closely abutted against the stopper 1114 of another adjacent telescopic frame 111 to form an effective stopper to prevent the telescopic frame 111 from being overextended due to external force or operational error, thereby ensuring the overall stability of the support frame 10.

[0048] like Figure 1 and Figure 4 In one embodiment, the telescopic frame 111 also includes a second limit member 1115, which is fixedly installed on the outer side of the top end of each telescopic frame 111. When the telescopic structure is in a retracted state, the second limit member 1115 of one telescopic frame 111 abuts against the second limit member 1115 of another adjacent telescopic frame 111.

[0049] In this embodiment, in order to ensure the stability of the support frame 10 in the retracted state, a second stopper 1115 is further provided on the outer side of the top end of each telescopic frame 111. The second stopper 1115 is a baffle. The connection between the second stopper 1115 and the telescopic frame 111 can be made by welding or integrated design. When the support frame 10 gradually retracts, the second stopper 1115 of one telescopic frame 111 will gradually approach the second stopper 1115 of another adjacent telescopic frame 111 until it abuts. The design of the second stopper 1115 facilitates the telescopic frame 111 to find its designated retracted position, while improving the stability of the support frame 10 in the retracted state, ensuring safety during movement and storage.

[0050] like Figure 1 In one embodiment, the telescopic frame 111 further includes a plurality of transverse beams 1116 and a plurality of diagonal beams 1117. The plurality of transverse beams 1116 are arranged at intervals on the frame surface of the telescopic frame 111, and a diagonal beam 1117 is obliquely arranged between two transverse beams 1116.

[0051] And / or, the lifting member 12 is installed in the support frame 10 body.

[0052] In this embodiment, the horizontal tie beam 1116 spans across the opening of the telescopic frame 111 to enhance the lateral stability of the telescopic frame 111 and prevent the telescopic frame 111 from lateral bending or twisting when bearing a load. At the same time, the setting of the horizontal tie beam 1116 can also disperse the pressure from the top and improve the bearing capacity of the entire support frame 10; the inclined beam 1117 is inclinedly arranged between the two horizontal tie beams 1116 to form a certain angle, so that the telescopic frame 111 can effectively resist the shear force caused by the load, and at the same time enhance the structural strength of the entire support frame 10. At the same time, the setting of the inclined beam 1117 facilitates the uniform transfer of the top load to various parts of the support frame 10, thereby improving the structural stability of the support frame 10.

[0053] With or without the above-mentioned embodiments, in the present embodiment, the lifting member 12 is installed in the internal space of the support frame 10 body, which effectively reduces the working space of the support frame 10 to facilitate the transportation of the support frame 10. At the same time, installing the lifting member 12 inside the support frame 10 helps to protect the lifting member 12 from damage by the external environment, thereby increasing the service life of the lifting member 12.

[0054] like Figure 5 The present invention further provides a 3D printing device 100, which includes a cantilever structure 20, a support frame 10 and a 3D printing head 30. The cantilever structure 20 is installed at the top of the support frame 10, and the 3D printing head 30 is installed at one end of the cantilever structure 20 away from the support frame 10. The specific structure of the support frame 10 refers to the above embodiment. Since the support frame 10 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0055] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A support frame, applied to concrete 3D printing equipment, characterized in that: The support frame comprises: A support frame body, the support frame body comprising a plurality of telescopic frames, the plurality of telescopic frames being movably connected in sequence along the vertical direction, so that the support frame body has a retracted state and an expanded state, and the telescopic frame at the top end of the support frame is connected to an external cantilever structure; A lifting member, one end of which is mounted on the horizontal mounting surface of the support frame, and the other end is used to connect with the cantilever structure, and the lifting member drives the cantilever structure to move in the vertical direction to drive the support frame body to switch between the retracted state and the expanded state.

2. The support frame according to claim 1, characterized in that: The support frame also includes a first rolling member, which is installed at one end of each telescopic frame. The telescopic frame has a first sliding groove on the inner side in the vertical direction, and the first rolling member of one telescopic frame is slidably arranged in the first sliding groove of the adjacent telescopic frame.

3. The support frame according to claim 2, characterized in that: The support frame also includes an adjustment component, which includes a driving member and a film pressure sensor. The driving member is installed at one end of each telescopic frame and is drivingly connected to the first rolling member. The film pressure sensor is attached to an inner groove wall of the slide groove. The driving member of one telescopic frame drives the first rolling member to abut against the film pressure sensor in the adjacent telescopic frame.

4. The support frame according to claim 3, characterized in that: The driving member includes a driving motor, a screw rod and a slider. The driving motor is drivingly connected to the screw rod. The screw rod is inserted into the slider. The slider is fixedly connected to the first rolling member.

5. The support frame according to claim 3, characterized in that: The support frame also includes a second rolling member, which is installed at the other end of each telescopic frame and is located on the inner and outer sides of the telescopic frame respectively with the first rolling member. The telescopic frame is provided with a second sliding groove on the outer side in the vertical direction, and the second rolling member of one telescopic frame is slidably arranged in the second sliding groove of the adjacent telescopic frame.

6. The support frame according to claim 5, characterized in that: The support frame includes multiple first rolling members, multiple second rolling members and multiple sensor components. The telescopic frame has multiple first sliding grooves and multiple second sliding grooves correspondingly arranged in the circumference. One sensor component is connected to one rolling member, one first rolling member is slidably arranged in one first sliding groove, and one second rolling member is slidably arranged in one second sliding groove.

7. The support frame according to any one of claims 1 to 6, characterized in that: The telescopic frame includes a first limit member and a stop member, which are respectively arranged at two ends of each telescopic frame. When the support frame body is in the unfolded state, the first limit member of one telescopic frame abuts against the stop member of another adjacent telescopic frame.

8. The support frame according to claim 7, characterized in that: The telescopic frame also includes a second limiter, which is fixedly mounted on the outer side of the top end of each telescopic frame. When the telescopic structure is in a retracted state, the second limiter of one telescopic frame abuts against the second limiter of another adjacent telescopic frame.

9. The support frame according to any one of claims 1 to 6, characterized in that: The telescopic frame further comprises a plurality of transverse beams and a plurality of diagonal beams, wherein the plurality of transverse beams are arranged at intervals on the frame surface of the telescopic frame, and one diagonal beam is obliquely arranged between two transverse beams; And / or, the lifting member is installed in the support frame body.

10. A 3D printing device, characterized in that: The 3D printing device includes a cantilever structure, a support frame and a 3D printing head. The support frame is a support frame as described in any one of claims 1 to 9. The cantilever structure is installed at the top of the support frame, and the 3D printing head is installed at one end of the cantilever structure away from the support frame.

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