Telescopic cantilever structure and 3D printing equipment

Abstract

The invention relates to the technical field of concrete 3D equipment printing, and particularly discloses a telescopic cantilever structure and 3D printing device.The telescopic cantilever structure comprises a fixing frame, a telescopic frame, a balance assembly, a sensing part and a control assembly, the telescopic frame is connected with a sliding cavity of the fixing frame in a sliding connection mode, so that the telescopic frame can freely move in the sliding cavity; when the telescopic frame extends outwards to a certain length relative to the fixed frame, the sensing part arranged between the fixed frame and the external supporting structure senses pressure change and sends a signal to the control assembly, and the control assembly instructs the driving assembly to drive the balance part to move according to the received signal so as to counteract downward pressure generated by the telescopic frame. By means of the balancing mechanism, the contact force between the fixing frame and the external supporting structure is stable, the stability of the whole telescopic cantilever structure is guaranteed, meanwhile, the weight of the fixing frame body is reduced, and the telescopic cantilever structure can be transported conveniently.

Description

Technical Field

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

[0002] When the concrete 3D printing equipment is working, the telescopic frame of the telescopic cantilever structure needs to be extended and retracted relative to the fixed frame. When the telescopic frame is extended to a certain length, a downward force will be generated due to the deadweight of the telescopic frame, thereby increasing the deflection load at the supporting position of the fixed frame, resulting in a decrease in the overall stability of the telescopic cantilever structure.

[0003] Most current technologies ensure the overall stability of the telescopic cantilever structure by increasing the deadweight of the fixed frame. However, since concrete 3D printing equipment is used on construction sites, its excessive deadweight will make the equipment inconvenient to transport, resulting in reduced maneuverability and affecting work efficiency. Summary of the invention

[0004] The main purpose of the present invention is to propose a telescopic cantilever structure, which aims to solve the problem that the telescopic frame of the existing concrete 3D printing equipment has poor overall structural stability due to its own weight during the telescopic process.

[0005] To achieve the above object, the present invention provides a telescopic cantilever structure, comprising:

[0006] A fixed frame, wherein a sliding cavity is formed in the fixed frame;

[0007] A telescopic frame, the telescopic frame being slidably disposed in the sliding cavity;

[0008] A balancing assembly, the balancing assembly comprising a balancing member and a driving assembly, the balancing member being slidably connected in the sliding cavity, the driving assembly being mounted on the fixing frame and drivingly connected to the balancing member to drive the balancing member to slide along the length direction of the sliding cavity;

[0009] A sensor, which is mounted on the bottom of the fixing frame and is used to abut against the supporting structure; and

[0010] The control component is electrically connected to the driving component and the sensor, and the control component receives the signal from the sensor to control the driving component to drive the balancing member to move.

[0011] In one embodiment, the telescopic cantilever structure is provided with four sensing elements, and the four sensing elements are arranged in an array and installed at the bottom end of the fixing frame.

[0012] In one embodiment, the driving assembly includes a first transmission wheel, a second transmission wheel, a first driving member and a driving chain, wherein the first transmission wheel and the second transmission wheel are installed at intervals on one side of the fixing frame perpendicular to the length direction of the sliding cavity, and correspond to the positions of the starting end and the ending end of the motion path of the balancing member respectively;

[0013] The first driving member is drivingly connected to the first transmission wheel, the driving chain is wound around the circumferential outer sides of the first transmission wheel and the second transmission wheel, and the balancing member is connected to the driving chain.

[0014] In one embodiment, the telescopic cantilever structure includes two balancing components, and the two balancing components are installed at intervals on both sides of the fixing frame perpendicular to the length direction of the sliding cavity.

[0015] In one embodiment, the driving assembly also includes an adjusting member, which is connected to the outside of the fixing frame, and the adjusting member is provided with a first strip hole, and the end of the second transmission wheel away from the sliding cavity is slidably connected to the first strip hole to adjust the installation height of the second transmission wheel to be the same as the installation height of the first transmission wheel.

[0016] In one embodiment, a rack is provided on the top wall of the sliding cavity along its length direction, a gear is provided on one end of the telescopic frame close to the top wall of the sliding cavity, and a second driving member is provided in the telescopic frame, the second driving member is drivingly connected to the gear, and the gear is meshed with the rack to drive the telescopic frame to move along the length direction of the sliding cavity;

[0017] The bottom wall of the sliding cavity is provided with a first sliding block along its length direction, and one end of the telescopic frame close to the bottom wall of the sliding cavity is correspondingly provided with a second sliding block, and the second sliding block is slidably arranged on the first sliding block.

[0018] In one embodiment, two slide rails are spaced apart on both sides of the first sliding block on the bottom wall of the sliding cavity, and two roller groups are correspondingly installed at one end of the telescopic frame close to the bottom wall of the sliding cavity, and one roller group is slidably mounted on one of the slide rails.

[0019] In one embodiment, a distance measuring component is provided at one end of the fixed frame away from the balancing assembly, and a receiving component is correspondingly provided at one end of the telescopic frame away from the fixed frame. The receiving component receives a signal sent by the distance measuring component to monitor the telescopic length of the telescopic frame.

[0020] The present invention also proposes a 3D printing device, comprising a telescopic cantilever structure, a supporting structure and a 3D printing head, wherein the telescopic cantilever structure is the telescopic cantilever structure as described above, the telescopic cantilever structure is installed at the top of the supporting structure, the sensor is installed at the bottom of the telescopic cantilever structure and abuts against the supporting structure, and the 3D printing head is installed at one end of the telescopic cantilever structure.

[0021] In one embodiment, a mounting piece is provided at the bottom end of the telescopic cantilever structure, the mounting piece has a spherical mounting hole, and the supporting structure is correspondingly provided with an insert, and the insert is spherically hinged to the spherical mounting hole.

[0022] The present invention provides a telescopic cantilever structure, comprising a fixed frame, a telescopic frame, a balancing component, a sensor and a control component. The telescopic frame is connected to a sliding cavity of the fixed frame by a sliding connection, so that the telescopic frame can move freely in the sliding cavity. When the telescopic frame is extended outward to a certain length relative to the fixed frame, the sensor arranged between the fixed frame and the external support structure senses the pressure change and sends a signal to the control component. The control component instructs the driving component to drive the balancing component to move according to the received signal to offset the downward pressure generated by the telescopic frame. Through this balancing mechanism, the contact force between the fixed frame and the external support structure is stabilized, thereby ensuring the stability of the entire telescopic cantilever structure. At the same time, the weight of the fixed frame body is reduced, so that the telescopic cantilever structure is easy to transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of a 3D printing device of the present invention;

[0025] Figure 2 for Figure 1 A structural schematic diagram of another perspective of the embodiment;

[0026] Figure 3 for Figure 1 A cross-sectional view of an embodiment of the present invention;

[0027] Figure 4 for Figure 1 A magnified schematic diagram of the structure at center A;

[0028] Figure 5 for Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0029] Figure 6 for Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0030] Figure 7 for Figure 3 A magnified schematic diagram of the structure at D in the middle;

[0031] Figure 8 for Figure 1 A partial enlarged view of another viewing angle of the embodiment.

[0032] Description of Figure Numbers:

[0033] 100, 3D printing equipment; 10, telescopic cantilever structure; 11, fixed frame; 111, sliding cavity; 112, rack; 113, first slider; 114, slide rail; 115, distance measuring member; 12, telescopic frame; 121, gear; 122, second driving member; 123, second slider; 124, roller group; 125, receiving member; 13, balancing assembly; 131, balancing member; 132, driving assembly; 1 321. first transmission wheel; 1322. second transmission wheel; 1323. first driving member; 1324. driving chain; 14. sensing member; 15. adjusting member; 151. fixing plate; 1511. first strip hole; 1512. second strip hole; 152. fixing block; 153. adjusting block; 154. adjusting bolt; 16. mounting member; 161. spherical mounting hole; 20. supporting structure; 21. plug-in member.

[0034] 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

[0035] 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.

[0036] 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.

[0037] 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.

[0038] When the concrete 3D printing equipment is working, the telescopic frame of its telescopic cantilever structure needs to be telescoped relative to the fixed frame. When the telescopic frame is extended to a certain length, a downward force will be generated due to the deadweight of the telescopic frame, thereby increasing the deflection load at the supporting position of the fixed frame, resulting in a decrease in the overall stability of the telescopic cantilever structure. Most current technologies ensure the overall stability of the telescopic cantilever structure by increasing the deadweight of the fixed frame. However, since the concrete 3D printing equipment is used on construction sites, excessive deadweight will make the equipment inconvenient to transport, resulting in reduced mobility and affecting work efficiency.

[0039] In order to solve the above problems, the present invention proposes a telescopic cantilever structure, which aims to solve the problem that the telescopic frame of the existing concrete 3D printing equipment has poor overall structural stability due to its own weight during the telescopic process.

[0040] like Figure 1 , Figure 4 , Figure 6 and Figure 8 In one embodiment, the telescopic cantilever structure 10 for the concrete 3D printing device 100 includes a fixed frame 11, a telescopic frame 12, a balancing assembly 13, a sensor 14 and a control assembly (not shown). A sliding cavity 111 is formed in the fixed frame 11, and the telescopic frame 12 is slidably arranged in the sliding cavity 111. The balancing assembly 13 includes a balancing member 131 and a driving assembly 132. The balancing member 131 is slidably connected in the sliding cavity 111. The driving assembly 132 is installed on the fixed frame 11 and is driven to be connected to the balancing member 131 to drive the balancing member 131 to slide along the length direction of the sliding cavity 111. The sensor 14 is installed at the bottom of the fixed frame 11 and is used to abut against the support structure 20. The driving assembly 132 and the sensor 14 are both electrically connected to the control assembly. The control assembly receives a signal from the sensor 14 to control the driving assembly 132 to drive the balancing member 131 to move.

[0041] In this embodiment, the main structure of the telescopic cantilever structure 10 is made of H100 steel, which ensures structural stability and bearing capacity while maximizing lightness to facilitate transportation of the telescopic cantilever structure 10, thereby improving the maneuverability of the telescopic cantilever structure 10.

[0042] Specifically, the telescopic frame 12 is connected to the sliding cavity 111 of the fixed frame 11 by means of a sliding connection, so that the telescopic frame 12 can move freely in the sliding cavity 111 to meet actual work requirements. When the telescopic frame 12 extends outward to a certain length relative to the fixed frame 11, the part of the telescopic frame 12 extending out of the fixed frame 11 will generate a downward pressure on the end of the fixed frame 11 close to the telescopic frame 12 due to its own gravity, resulting in a reduction in the contact force between the fixed frame 11 and the external support structure 20. At this time, the sensor 14 arranged between the fixed frame 11 and the external support structure 20 senses the pressure change and immediately sends a signal to the control component. The control component instructs the drive component 132 to drive the balance member 131 to move based on the received signal. The balance member 131 is a counterweight block. The drive component 132 controls the balance member 131 to move in a direction extending away from the telescopic frame 12. After the balance member 131 moves, its gravity acts on the other end of the fixed frame 11 to generate a force in the opposite direction, thereby offsetting the downward pressure generated by the telescopic frame 12 on the fixed frame 11. Through this balancing mechanism, the contact force between the fixed frame 11 and the external support structure 20 is stabilized, thereby ensuring the stability of the entire telescopic cantilever structure 10. At the same time, through the real-time transmission signal of the sensor 14, the dynamic balance of the counterweight block and the telescopic frame 12 during the extension process is achieved, ensuring the safety and reliability of the telescopic cantilever structure 10 during use, thereby improving the practicality of the telescopic cantilever structure 10.

[0043] The present invention provides a telescopic cantilever structure 10, comprising a fixed frame 11, a telescopic frame 12, a balancing component 13, a sensor 14 and a control component. The telescopic frame 12 is connected to a sliding cavity 111 of the fixed frame 11 by a sliding connection, so that the telescopic frame 12 can move freely in the sliding cavity 111. When the telescopic frame 12 extends outward to a certain length relative to the fixed frame 11, the sensor 14 arranged between the fixed frame 11 and the external support structure 20 senses the pressure change and sends a signal to the control component. The control component instructs the driving component 132 to drive the balancing component 131 to move according to the received signal. Through this balancing mechanism, the contact force between the fixed frame 11 and the external support structure 20 is stabilized, thereby ensuring the stability of the entire telescopic cantilever structure 10.

[0044] like Figure 1 , Figure 4 , Figure 6 and Figure 8In one embodiment, the telescopic cantilever structure 10 is provided with four sensors 14 , and the four sensors 14 are arranged in an array and installed at the bottom end of the fixing frame 11 .

[0045] In this embodiment, four sensors 14 are arranged in an array at the bottom of the fixed frame 11. This layout ensures that the contact force between the fixed frame 11 and the external support structure 20 can be evenly monitored and controlled at multiple points, so as to ensure that the sensors 14 can effectively sense the small movement and force changes of the fixed frame 11 in all directions. One end of each sensor 14 is fixed to the fixed frame 11, and the other end is directly in contact with the external support structure 20, so that the sensor 14 can transmit the contact force information between the fixed frame 11 and the external support structure 20 in real time, provide accurate data support for the adjustment of the balance component 13, and then control the driving component 132 through the control component to adjust the position of the balance component 131 to maintain the balance of the telescopic cantilever structure 10. In this embodiment, the array arrangement of multiple sensors 14 improves the control accuracy of the balance component 13 and further improves the stability and safety of the telescopic cantilever structure 10 during operation.

[0046] like Figure 6 and Figure 8 In one embodiment, the driving assembly 132 includes a first transmission wheel 1321, a second transmission wheel 1322, a first driving member 1323 and a driving chain 1324. The first transmission wheel 1321 and the second transmission wheel 1322 are installed at intervals on one side of the fixing frame 11 perpendicular to the length direction of the sliding cavity 111, and correspond to the positions of the starting end and the ending end of the motion path of the balancing member 131 respectively.

[0047] The first driving member 1323 is drivingly connected to the first transmission wheel 1321 , the driving chain 1324 is wound around the circumferential outer sides of the first transmission wheel 1321 and the second transmission wheel 1322 , and the balancing member 131 is connected to the driving chain 1324 .

[0048] In this embodiment, the first transmission wheel 1321 and the second transmission wheel 1322 are two gears, wherein the first transmission wheel 1321 is driven and connected to the first driving member 1323 as a driving wheel, and the first driving member 1323 can be a motor or an electric machine, and the second transmission wheel 1322 is a driven wheel. The driving chain 1324 is wound around the circumferential outer side of the first transmission wheel 1321 and the second transmission wheel 1322 to form a closed chain loop. The first driving member 1323 drives the driving wheel to rotate so that the driving chain 1324 performs a circumferential circulation motion. The balancing member 131 is fixedly connected to the driving chain 1324 to transmit the power of the driving chain 1324 to the balancing member 131, so that it follows the driving chain 1324 to move relative to the fixed frame 11, thereby improving the movement accuracy of the balancing member 131 and at the same time improving the adjustment accuracy of the balancing assembly 13. In addition, the bottom and side ends of the balancing member 131 are provided with sliding grooves, and the bottom end of the fixed frame 11 and the corresponding side end of the balancing member 131 are provided with sliding tubes respectively. The balancing member 131 can slide relative to the fixed frame 11 through the cooperation between its own sliding groove and the sliding tube of the fixed frame 11, thereby improving its own sliding smoothness and at the same time improving its own movement stability.

[0049] like Figure 6 and Figure 8 In one embodiment, the telescopic cantilever structure 10 includes two balancing components 13 , and the two balancing components 13 are installed at intervals on both sides of the fixing frame 11 perpendicular to the length direction of the sliding cavity 111 .

[0050] In this embodiment, the telescopic cantilever structure 10 includes two balancing components 13, which are installed at intervals on both sides of the fixed frame 11 perpendicular to the length direction of the sliding cavity 111. Each balancing component 13 can be adjusted separately according to actual needs without affecting the operation of another balancing component 13. When the telescopic frame 12 is telescoped relative to the fixed frame 11, each balancing component 13 can fine-tune the position of its own balancing member 131 according to the actual load generated by the telescopic frame 12 to adapt to the uneven load generated by the telescopic frame 12, thereby further improving the adjustment accuracy and ensuring the working stability of the telescopic cantilever structure 10.

[0051] like Figure 1 , Figure 5 and Figure 6 In one embodiment, the driving assembly 132 also includes an adjusting member 15, which is connected to the outside of the fixing frame 11. The adjusting member 15 is provided with a first strip hole 1511. One end of the second transmission wheel 1322 away from the sliding cavity 111 is slidably connected to the first strip hole 1511 to adjust the installation height of the second transmission wheel 1322 to be the same as the installation height of the first transmission wheel 1321.

[0052] In this embodiment, the adjusting member 15 includes a fixing plate 151, a fixing block 152, an adjusting block 153 and an adjusting bolt 154. The fixing plate 151 is installed on the fixing frame 11. A first strip hole 1511 is provided in the fixing plate 151. The end of the second transmission wheel 1322 away from the inside of the fixing frame 11 is connected to the adjusting block 153 by a bolt. At the same time, the bolt presses the adjusting block 153 against the fixing plate 151. The adjusting block 153 and the fixing plate 151 are also provided with a second strip hole 1512 that passes through. The fixing block 152 is located at the upper end of the adjusting block 153 and is fixedly installed on the fixing plate 151. The adjusting bolt 154 is threadedly connected to the fixing block 152 and abuts against the adjusting block 153.

[0053] Specifically, when the adjusting bolt 154 is rotated, the adjusting bolt 154 can drive the adjusting block 153 to move relative to the first strip hole 1511, thereby driving the second transmission wheel 1322 to move in the vertical direction. When the second transmission wheel 1322 moves to the specified position, the nut is threadedly connected to the second strip hole 1512 for locking, thereby ensuring the installation stability of the second transmission wheel 1322. The setting of the adjusting member 15 can ensure that the driving chain 1324 runs smoothly between the two transmission wheels, avoids the driving chain 1324 from jumping or falling off due to height difference, thereby ensuring that the balancing member 131 can move smoothly and accurately.

[0054] like Figure 1 and Figure 8 In one embodiment, a rack 112 is provided on the top wall of the sliding cavity 111 along its length direction, and a gear 121 is correspondingly provided at one end of the telescopic frame 12 close to the top wall of the sliding cavity 111. A second driving member 122 is also provided in the telescopic frame 12, and the second driving member 122 is drivingly connected to the gear 121, and the gear 121 is meshed with the rack 112 to drive the telescopic frame 12 to move along the length direction of the sliding cavity 111;

[0055] The bottom wall of the sliding cavity 111 is provided with a first sliding block 113 along its length direction. The telescopic frame 12 is provided with a second sliding block 123 at one end close to the bottom wall of the sliding cavity 111 . The second sliding block 123 is slidably disposed on the first sliding block 113 .

[0056] In this embodiment, a rack 112 is provided on the top wall of the sliding cavity 111 along its length direction, and a gear 121 is correspondingly provided on one end of the telescopic frame 12 close to the top wall of the sliding cavity 111. The second driving member 122 drives the gear 121 to rotate. The gear 121 can convert its own rotational motion into linear motion by engaging with the rack 112, thereby pushing the telescopic frame 12 to extend and retract in the sliding cavity 111. At the same time, the meshing action of the gear 121 and the rack 112 enables the telescopic frame 12 to move accurately along the length direction of the sliding cavity 111, so that the extension and contraction of the telescopic frame 12 are more accurate, thereby improving the working accuracy of the telescopic cantilever structure 10.

[0057] Furthermore, a first slider 113 is provided on the inner bottom wall of the sliding cavity 111 along its length direction, and a second slider 123 is correspondingly provided on one end of the telescopic frame 12 close to the inner bottom wall of the sliding cavity 111. The second slider 123 is slidably arranged on the first slider 113. The sliding connection between the first slider 113 and the second slider 123 reduces the friction between the bottom end of the telescopic frame 12 and the fixed frame 11, thereby ensuring that the telescopic frame 12 can move smoothly when extending or contracting, and at the same time improving the stability of its own movement.

[0058] like Figure 1 and Figure 8 In one embodiment, two slide rails 114 are spaced apart on both sides of the first slider 113 on the inner bottom wall of the sliding cavity 111 , and two roller groups 124 are correspondingly installed at one end of the telescopic frame 12 close to the inner bottom wall of the sliding cavity 111 , and one roller group 124 is slidably disposed on one slide rail 114 .

[0059] In this embodiment, two slide rails 114 are provided at intervals on both sides of the first slider 113 on the inner bottom wall of the sliding cavity 111, and two roller groups 124 are correspondingly installed on one end of the telescopic frame 12 close to the inner bottom wall of the sliding cavity 111, each roller group 124 includes a plurality of rollers, and the number of rollers is not limited here, and these rollers can slide on the slide rails 114, thereby further reducing the friction between the bottom end of the telescopic frame 12 and the fixed frame 11, so that the telescopic frame 12 can achieve smooth linear motion on the slide rails 114, thereby improving its own motion efficiency. At the same time, the design of the roller group 124 provides an additional support point for the telescopic frame 12, further improving the sliding stability of the telescopic frame 12.

[0060] like Figure 1 and Figure 6 In one embodiment, a distance measuring component 115 is provided at one end of the fixed frame 11 away from the balancing assembly 13, and a receiving component 125 is correspondingly provided at one end of the telescopic frame 12 away from the fixed frame 11. The receiving component 125 receives the signal sent by the distance measuring component 115 to monitor the telescopic length of the telescopic frame 12.

[0061] In this embodiment, the distance measuring component 115 is a laser rangefinder, and the receiving component 125 is a photoelectric converter. When the telescopic cantilever structure 10 is extended or retracted, the distance measuring component 115 continuously monitors the telescopic length of the telescopic frame 12, and transmits the measured distance information to the external control system through the receiving component 125, and adjusts the position of the balancing component 131 in real time according to this information to maintain the stability of the telescopic cantilever structure 10, thereby improving the stability and safety of the telescopic cantilever structure 10 under various working conditions.

[0062] like Figure 1 and Figure 4 The present invention further proposes a 3D printing device 100, which includes a telescopic cantilever structure 10, a support structure 20 and a 3D printing head (not shown). The telescopic cantilever structure 10 is installed at the top of the support structure 20, the sensor 14 is installed at the bottom of the telescopic cantilever structure 10 and abuts against the support structure 20, and the 3D printing head is installed at one end of the telescopic cantilever structure 10. The specific structure of the telescopic cantilever structure 10 refers to the above embodiment. Since the telescopic cantilever structure 10 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0063] like Figure 1 and Figure 7 In a specific embodiment, a mounting member 16 is provided at the middle of the bottom end of the telescopic cantilever structure 10, and the mounting member 16 is provided with a spherical mounting hole 161. The support structure 20 is correspondingly provided with an insert 21, and the insert 21 is a spherical structure. When the telescopic cantilever structure 10 and the support structure 20 are fixedly installed, the insert 21 is spherically hinged to the spherical mounting hole 161. The ball-hinged design facilitates fine adjustment of the telescopic cantilever structure 10 relative to the support structure 20, reduces the rigid connection between the two, and thereby improves the structural stability of the 3D printing device 100.

[0064] 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 telescopic cantilever structure is applied to a concrete 3D printing device, wherein the concrete 3D printing device further comprises a supporting structure, and the telescopic cantilever structure is arranged at the top of the supporting structure, wherein: The telescopic cantilever structure comprises: A fixed frame, wherein a sliding cavity is formed in the fixed frame; A telescopic frame, the telescopic frame being slidably disposed in the sliding cavity; A balancing assembly, the balancing assembly comprising a balancing member and a driving assembly, the balancing member being slidably connected in the sliding cavity, the driving assembly being mounted on the fixing frame and drivingly connected to the balancing member to drive the balancing member to slide along the length direction of the sliding cavity; A sensor, which is mounted on the bottom of the fixing frame and is used to abut against the supporting structure; and The control component is electrically connected to the driving component and the sensor, and the control component receives the signal from the sensor to control the driving component to drive the balancing member to move.

2. The telescopic cantilever structure according to claim 1, characterized in that: The telescopic cantilever structure is provided with four sensing elements, and the four sensing elements are arranged in an array and installed at the bottom end of the fixing frame.

3. The telescopic cantilever structure according to claim 1, characterized in that: The driving assembly includes a first transmission wheel, a second transmission wheel, a first driving member and a driving chain. The first transmission wheel and the second transmission wheel are installed at intervals on one side of the fixing frame perpendicular to the length direction of the sliding cavity, and correspond to the positions of the starting end and the ending end of the motion path of the balancing member respectively. The first driving member is drivingly connected to the first transmission wheel, the driving chain is wound around the circumferential outer sides of the first transmission wheel and the second transmission wheel, and the balancing member is connected to the driving chain.

4. The telescopic cantilever structure according to claim 3, characterized in that: The telescopic cantilever structure comprises two balancing components, and the two balancing components are installed at intervals on both sides of the fixing frame perpendicular to the length direction of the sliding cavity.

5. The telescopic cantilever structure according to claim 3, characterized in that: The driving assembly also includes an adjusting member, which is connected to the outside of the fixing frame. The adjusting member is provided with a first strip hole, and one end of the second transmission wheel away from the sliding cavity is slidably connected to the first strip hole to adjust the installation height of the second transmission wheel to be the same as the installation height of the first transmission wheel.

6. The telescopic cantilever structure according to any one of claims 1 to 5, characterized in that: The top wall of the sliding cavity is provided with a rack along its length direction, and one end of the telescopic frame close to the top wall of the sliding cavity is correspondingly provided with a gear. A second driving member is also provided in the telescopic frame, and the second driving member is drivingly connected to the gear, and the gear is meshed with the rack to drive the telescopic frame to move along the length direction of the sliding cavity; The bottom wall of the sliding cavity is provided with a first sliding block along its length direction, and one end of the telescopic frame close to the bottom wall of the sliding cavity is correspondingly provided with a second sliding block, and the second sliding block is slidably arranged on the first sliding block.

7. The telescopic cantilever structure according to claim 6, characterized in that: Two slide rails are spaced apart on both sides of the first sliding block on the bottom wall of the sliding cavity, and two roller groups are correspondingly installed at one end of the telescopic frame close to the bottom wall of the sliding cavity, and one roller group is slidably arranged on one of the slide rails.

8. The telescopic cantilever structure according to any one of claims 1 to 5, characterized in that: A distance measuring component is arranged at one end of the fixing frame away from the balancing assembly, and a receiving component is correspondingly arranged at one end of the telescopic frame away from the fixing frame. The receiving component receives a signal sent by the distance measuring component to monitor the telescopic length of the telescopic frame.

9. A 3D printing device, characterized in that: It includes a telescopic cantilever structure, a supporting structure and a 3D printing head, wherein the telescopic cantilever structure is the telescopic cantilever structure as described in any one of claims 1 to 8, the telescopic cantilever structure is installed at the top of the supporting structure, the sensor is installed at the bottom of the telescopic cantilever structure and abuts against the supporting structure, and the 3D printing head is installed at one end of the telescopic cantilever structure.

10. The telescopic cantilever structure according to claim 9, characterized in that: A mounting piece is arranged at the bottom end of the telescopic cantilever structure, and a spherical mounting hole is opened in the mounting piece. A plug-in piece is correspondingly arranged on the supporting structure, and the plug-in piece is spherically hinged to the spherical mounting hole.

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