Air pump assembly and 3D printing equipment

Abstract

According to the air pump assembly and the 3D printing equipment, the air pump assembly comprises a pump body and a damping part, one end of the damping part is connected with the pump body, and the other end of the damping part is used for stretching into a supporting body so that the pump body can be installed on the supporting body. The damping part extends into the supporting body, so that certain relative floating can be kept between the pump body and the supporting body, the deformation capacity of the damping part is improved, the absorption capacity of the damping part on pump body vibration is improved, the impact of pump body vibration on the supporting body is reduced, the working noise of the pump body is reduced, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a gas pump assembly and a 3D printing device. BACKGROUND

[0002] Gas pumps are widely used in people's production and life due to their high efficiency and reliability. For example, in order to provide cleaning and cooling for printing materials during the printing process, a gas pump is usually equipped in a 3D printing device.

[0003] However, the traditional gas pump often generates significant vibration and noise during operation. These vibrations not only affect the printing accuracy, causing defects in the printed parts, but also may cause noise interference to the surrounding environment, reducing the user's experience. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a gas pump assembly and a 3D printing device, aiming to solve the problem of large vibration of the gas pump in the related art.

[0005] To achieve the purpose of the present application, in a first aspect, the present application provides a gas pump assembly, comprising:

[0006] a pump body;

[0007] a damping member, one end of which is connected with the pump body, and the other end of which is used to extend into a support body to install the pump body on the support body.

[0008] In a possible implementation manner, the gas pump assembly further comprises a bracket, the bracket is configured as the support body, the bracket is provided with a mounting hole, and the damping member extends into the mounting hole.

[0009] In a possible implementation manner, the pump body comprises a first pump face and a second pump face arranged adjacent to each other; the bracket comprises a first support part and a second support part connected with each other, the first support part is provided with a first mounting hole, and the second support part is provided with a second mounting hole; the damping member comprises a first damping member and a second damping member;

[0010] one end of the first damping member is connected with the first pump face, and the other end of the first damping member extends into the first mounting hole; one end of the second damping member is connected with the second pump face, and the other end of the second damping member extends into the second mounting hole.

[0011] In a possible implementation manner, the bracket further comprises a support spring plate, the support spring plate comprises a connecting part and an elastic part connected with each other, and the connecting part is connected with the second support part away from the pump body;

[0012] The elastic part and the second support part are arranged opposite to each other in the first direction, and the second damping member passes through the second mounting hole and is in contact with the elastic part.

[0013] In a possible implementation, the elastic part is provided with a third mounting hole; the second damping member comprises a first shaft segment and a second shaft segment, and the shaft diameter of the first shaft segment is greater than the shaft diameter of the second shaft segment.

[0014] The first shaft segment and the second shaft segment have a stepped surface therebetween, the second shaft segment extends into the mounting hole, and the stepped surface is in contact with the side of the elastic part facing the second support part.

[0015] In a possible implementation, the bracket further comprises a third support part, the third support part is connected to the first support part and is arranged opposite to the second support part in the first direction.

[0016] The pump body further comprises a third pump surface, the third pump surface is arranged opposite to the second pump surface in the first direction, and the third pump surface is in contact with the third support part.

[0017] In a possible implementation, the pump body has an air inlet; the air pump assembly further comprises a pipeline and a filter assembly, and the filter assembly is arranged apart from the bracket.

[0018] The pipeline is connected between the filter assembly and the air inlet.

[0019] In a possible implementation, the air pump assembly further comprises a fastener, the fastener is used to be connected between the pump body and the support body, so as to lock the pump body to the support body.

[0020] In a second aspect, the application further provides a 3D printing device, the 3D printing device comprising an air pump assembly, the air pump assembly comprising:

[0021] a pump body;

[0022] a damping member, one end of the damping member being connected to the pump body, and the other end of the damping member being used to extend into a support body, so as to mount the pump body to the support body.

[0023] In a possible implementation, the 3D printing device further comprises a housing, the housing is formed with a working cavity, and the air pump assembly is mounted in the working cavity in the height direction of the working cavity.

[0024] In a possible implementation, the housing is configured as a support body, the housing is provided with a fourth mounting hole, the damping member extends into the fourth mounting hole, or

[0025] The air pump assembly also includes a bracket, which includes a support portion and a connecting portion connected to each other. The connecting portion is connected to the cavity wall of the working chamber. The support portion is provided with a mounting hole, and the shock absorber extends into the mounting hole.

[0026] In one possible implementation, the pump body is spaced apart from the wall of the working chamber.

[0027] In one possible implementation, the working chamber is provided with an air inlet, the pump body has an air inlet, and the air pump assembly further includes a pipe;

[0028] One end of the pipe is connected to the air inlet, and the other end extends out of the working chamber through the air inlet hole.

[0029] In one possible implementation, the air pump assembly further includes a filter assembly disposed on the side of the housing opposite to the working chamber;

[0030] The pipe is connected to the filter assembly.

[0031] This application extends the shock absorber into the support body, thereby enabling the pump body and the support body to maintain a certain relative floating, which increases the deformation capacity of the shock absorber, increases the shock absorber's ability to absorb pump body vibration, reduces the impact of pump body vibration on the support body, reduces pump body operating noise, and improves user experience. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the structure of one embodiment of the pump body assembly provided in this application;

[0034] Figure 2 for Figure 1 A schematic diagram of another embodiment of the pump body assembly;

[0035] Figure 3 for Figure 2 A three-dimensional structural diagram of the central support;

[0036] Figure 4 for Figure 2 Rear view;

[0037] Figure 5 for Figure 2 Side view;

[0038] Figure 6 is Figure 5 a local enlarged view at A;

[0039] Figure 7 is Figure 2 a top view.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 100 - air pump assembly;

[0042] 1 - pump body, 11 - first pump face, 12 - second pump face, 13 - third pump face;

[0043] 2 - damping member, 21 - first damping member, 22 - second damping member, 221 - first shaft section, 222 - second shaft section, 223 - stepped face;

[0044] 3 - bracket, 31 - first support portion, 311 - first mounting hole, 312 - connecting end, 32 - second support portion, 321 - second mounting hole, 33 - third support portion, 34 - support spring plate, 341 - connecting portion, 342 - spring portion;

[0045] 4 - pipe;

[0046] 5 - filter assembly;

[0047] 6 - fastener. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0049] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present.

[0050] Unless otherwise defined, all 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. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0051] Some embodiments of the present application will be described in detail with reference to the drawings, which are shown by way of illustration. The following embodiments and features of the embodiments can be combined with each other without conflict.

[0052] The present application proposes a 3D printing device, in some embodiments, the 3D printing device comprises a housing, a tool head, a hot bed and a gas pump assembly, wherein the housing is used as a support assembly of the 3D printing device, for supporting and connecting various component assemblies of the 3D printing device, the housing forms a working cavity for 3D printing, the hot bed and the tool head are movably arranged in the working cavity.

[0053] The tool head is used to heat, extrude and accurately deposit the printing material on the hot bed to build a three-dimensional model. In an embodiment of the present application, the tool head can include a nozzle and a heating element, the heating element is used to heat the printing material to a molten state, so as to ensure that the printing material can be smoothly extruded and uniformly deposited on the hot bed. The extruder is used to accurately extrude the molten printing material through the nozzle and deposit it on the hot bed layer by layer according to the predetermined path to form a three-dimensional model.

[0054] The hot bed is used to support and heat the material model extruded by the tool head, so as to enhance the adhesion of the first layer of material, provide a stable foundation for subsequent printing, at the same time, the hot bed can also slow down the cooling speed of the printed model, reduce the stress caused by temperature gradient in the printed model, and reduce the risk of deformation of the printed model.

[0055] The gas pump assembly is connected with the housing, the gas pump assembly is used to provide continuous airflow during printing to assist the cooling of the hot material extruded by the tool head, or to exhaust the waste and hot air in the working cavity outward, so as to reduce the interference of the hot air and waste on the printing material and improve the printing quality of the 3D printing device. In some embodiments, the gas pump can also transport the material in the tool head, so as to ensure that it can be smoothly deposited on the hot bed and maintain the stability of the printing process.

[0056] The air pump assembly can be installed in the working cavity or outside the working cavity. In some embodiments, the air pump assembly is installed in the working cavity along the height direction of the working cavity (i.e., the first direction Z of the air pump assembly is consistent with the height direction of the working cavity), thereby reducing the influence of external environmental factors on the performance of the air pump assembly and enhancing the working stability. At the same time, since the first direction Z of the air pump assembly is consistent with the height direction of the working cavity, the space occupation of the air pump assembly in the width and length directions of the working cavity can be reduced, thereby leaving more space for the working cavity to accommodate the hot bed, improving the arrangement area of the hot bed, improving the heat utilization efficiency of the hot bed, and improving the printing effect of the 3D printing equipment. In some possible embodiments, the 3D printing equipment includes a tool head which can be connected to a laser head, and the air pump assembly is connected to the laser head. The air pump assembly blows air into the laser head to blow off the debris / dirt of the light outlet of the laser head, thereby avoiding affecting the processing efficiency of the laser head.

[0057] Please refer to Figure 1 In some embodiments, the air pump assembly 100 includes a pump body 1 and a damping member 2. The pump body 1 is the core component of the air pump assembly 100 and is used to generate the necessary airflow and pressure for the operation of the air pump assembly 100. The pump body 1 has an air inlet and an air outlet. External gas can enter the pump body 1 through the air inlet and be discharged outward from the air outlet after being pressurized by the pump body 1.

[0058] The damping member 2 is connected to the pump body 1 at one end and is used to extend into the support body at the other end. The damping member 2 is used to mount the pump body 1 to the support body, so that a certain relative floating can be maintained between the pump body 1 and the support body, thereby increasing the deformation ability of the damping member 2, increasing the absorption ability of the damping member 2 to the vibration of the pump body 1, reducing the impact of the vibration of the pump body 1 on the support body, reducing the working noise of the pump body 1, and improving the user experience.

[0059] The damping member 2 can be an elastic material such as silicone, rubber, and polyurethane, or a spring, a disc spring, or the like. The damping member 2 can also be a hydraulic shock absorber or a pneumatic shock absorber, which is not limited in the present application. In some embodiments, the damping member 2 is made of rubber. Compared with other structures, rubber has a lower cost and occupies less space, which can effectively improve the space utilization of the air pump assembly 100 in the working cavity.

[0060] The number of the damping members 2 can be one, two or more, which is not limited in the application. In some embodiments, the pump body 1 comprises a first pump surface 11 and a second pump surface 12 arranged adjacently, and the damping members 2 comprise a first damping member 21 and a second damping member 22, the first damping member 21 is arranged on the first pump surface 11, and the second damping member 22 is arranged on the second pump surface 12. The number of the first damping members 21 can be one, two or more, and the number of the second damping members 22 can be one, two or more. For example, in some embodiments, the first damping members 21 are four and arranged in a rectangular shape on the first pump surface 11, and the second damping members 22 are two and arranged on the second pump surface 12 in the second direction X of the pump body 1. In this embodiment, the damping members 2 are arranged on different surfaces of the pump body 1, so as to isolate the contact between the pump body 1 and the support body in multiple directions, and to attenuate the vibration transmission from the pump body 1 to the support body in multiple directions, reduce the impact of the vibration of the pump body 1 on the support body, reduce the working noise of the pump body 1, and improve the user experience.

[0061] The support body can be a shell of a 3D printing device or other intermediate structure, that is, the pump body 1 can be directly installed on the shell through the damping members 2, or installed on other structures through the damping members 2, and then installed on the shell through the other structures, which is not limited in the application.

[0062] Please refer to Figure 2 and Figure 3 In some embodiments, the air pump assembly 100 further comprises a bracket 3 configured as a support body, the bracket 3 is provided with a mounting hole, and the damping members 2 extend into the mounting hole. Compared with directly installing the pump body 1 on the 3D printing device, the bracket 3 provides a stable installation platform for the pump body 1, and the installer can first complete the alignment and installation of the pump body 1 and the bracket 3 outside the working cavity, and then install the bracket 3 in the working cavity through screwing, buckling, welding or other methods, so as to simplify the steps of the air pump assembly 100, reduce the installation difficulty of the air pump assembly 100, and improve the installation efficiency of the air pump assembly 100. At the same time, the bracket 3 can effectively disperse the vibration generated by the pump body 1 during operation, attenuate the vibration transmitted from the pump body 1 to the shell and other structures, reduce the influence of the vibration generated by the pump body 1 during operation on the 3D printing device, reduce the working noise of the pump body 1, and improve the user experience.

[0063] Please refer to Figure 4In some embodiments, the bracket 3 comprises a first support part 31, which extends outwardly with a connecting end 312 for connecting with the shell. The body of the first support part 31 is provided with a first mounting hole 311. The first pump face 11 of the pump body 1 is arranged opposite to the first support part 31, one end of the first damping member 21 is connected with the first pump face 11, and the other end extends into the first mounting hole 311 and is in interference fit with the first mounting hole 311, so as to mount the pump body 1 on the first support part 31.

[0064] Please refer to Figure 5 The bracket 3 further comprises a second support part 32, which is connected with the first support part 31 and is arranged opposite to the second pump face 12. The second support part 32 is provided with a second mounting hole 321. One end of the second damping member 22 is connected with the second pump face 12, and the other end extends into the second mounting hole 321 and is in interference fit with the second mounting hole 321, so as to connect the pump body 1 with the second support part 32. The second support part 32 is arranged on one hand to cooperate with the first support part 31, so as to limit the movement of the pump body 1 in the second direction X, the third direction Y and part of the first direction Z, avoid unnecessary displacement of the pump body 1 due to vibration or impact during work, and improve the stability of the pump body 1 during work. On the other hand, the second support part 32 can keep the pump body 1 spaced from the cavity wall of the working cavity, so that the pump body 1 assembly can be suspended in the working cavity, thereby avoiding direct contact between the pump body 1 and the shell, reducing the vibration transmission of the pump body 1 to the shell, reducing the impact of the pump body 1 vibration on the shell, and reducing the working noise of the pump body 1. In a possible implementation manner of the present application, the tool head in the 3D printing device is also connected with a laser head. At this time, the air pump assembly can communicate with the laser head to blow off the debris / dirt of the light outlet of the laser head, and the air pump assembly can also be installed in the 3D printing device and integrated with the 3D printing device. The air flow path is shorter, and the installation is convenient, and the working efficiency is higher.

[0065] Please refer to Figure 6 To further attenuate the vibration transmission of the pump body 1 to the shell, in some embodiments, the bracket 3 further comprises a support elastic plate 34, which comprises a connecting part 341 and an elastic part 342 connected with each other. The connecting part 341 is connected with the second support part 32 away from the pump body 1. The elastic part 342 is arranged opposite to the second support part 32 in the first direction Z, and the second damping member 22 passes through the second mounting hole 321 and is in contact with the elastic part 342. The elastic part 342 is used to support the pump body 1 in the first direction Z. When the pump body 1 vibrates, the elastic part 342 can convert part of the vibration force of the pump body 1 into elastic force, and make the pump body 1 keep floating relative to the bracket 3 in the first direction Z, thereby attenuating the vibration transmission of the pump body 1 to the bracket 3, reducing the vibration impact of the pump body 1 on the bracket 3, and reducing the working noise of the pump body 1.

[0066] To improve the stability of the connection of the pump body 1 on the support elastic plate 34, in some embodiments, the elastic part 342 is provided with a third mounting hole (not shown in the figure), and correspondingly, the second damping member 22 includes a first shaft section 221 and a second shaft section 222, the shaft diameter of the first shaft section 221 is greater than that of the second shaft section 222, and the first shaft section 221 and the second shaft section 222 have a stepped surface 223 therebetween, which is in contact with the side of the elastic part 342 facing the second support part 32, thereby providing support for the arrangement of the second damping member 22 on the support elastic plate 34. The second shaft section 222 extends into the mounting hole, thereby providing a limit for the installation of the second damping member 22 on the support elastic plate 34, avoiding the second damping member 22 from being shaken off the support elastic plate 34 during the operation of the pump body 1, and improving the stability of the installation of the pump body 1 and the support 3.

[0067] Please refer to Figure 5 and Figure 7 In some embodiments, the support 3 further includes a third support part 33 connected with the first support part 31 and oppositely arranged with the second support part 32 along the first direction Z. The third support part 33 is used in cooperation with the second support part 32 to completely limit the pump body 1 in the first direction Z. Specifically, in the present embodiment, the pump body 1 further includes a third pump face 13 oppositely arranged with the second pump face 12 along the first direction Z, and the third pump face 13 is in contact with the third support part 33, so as to limit the pump body 1 in the first direction Z, avoid the pump body 1 from jumping up during the operation process, and improve the stability of the operation of the pump body 1 assembly.

[0068] Please refer to Figure 2 To avoid collision between the pump body 1 and the support 3 during transportation, in some embodiments, the air pump assembly 100 further includes a fastener 6 used for connecting between the pump body 1 and the support 3. The fastener 6 is used to lock the pump body 1 on the support 3 during the transportation of the pump body 1 assembly, so as to avoid damage caused by shaking and collision with other objects during the transportation of the pump body 1. When the pump body 1 assembly stops transportation, the fastener 6 unlocks the pump body 1 and the support 3, so that the pump body 1 can restore the up-and-down floating state, and reduce the vibration transmission of the pump body 1 to the support 3.

[0069] The fixing member can be a threaded structure, a buckle structure, or a magnetic attraction structure, which is not limited in the present application. In some embodiments, the pump body 1 is provided with a first connecting hole penetrating along the third direction Y, and the support 3 is provided with a second connecting hole. The fixing member includes a bolt and a nut, the shank of the bolt passes through the first connecting hole and the second connecting hole in sequence, and the nut is sleeved on the end of the shank, so that the pump body 1 and the support 3 are fixedly connected.

[0070] It can be understood that, in addition to the bracket, in other embodiments, the support body can also be the shell of the 3D printing device. Specifically, in the present embodiment, the shell is provided with a fourth mounting hole, and the damping member of the air pump assembly extends into the fourth mounting hole, so that the pump body 1 floats up and down relative to the shell in the first direction Z, thereby reducing the vibration transmission of the pump body 1 to the shell, reducing the influence of the vibration of the pump body 1 on the shell, reducing the working noise of the pump body 1, and improving the user experience.

[0071] When the shell is configured as the support body, the pump body can also be arranged spaced from the cavity wall of the working cavity and suspended in the working cavity (i.e., the pump body is in contact with the shell only through the damping member, and the pump body is spaced from the shell), so as to reduce the contact area between the pump body and the shell, reduce the vibration transmission of the pump body to the shell, reduce the working noise of the pump body, and improve the user experience.

[0072] At the same time, when the shell is configured as the support body, during transportation of the 3D printing device, the pump body can also be fixedly connected to the shell by the fixing member, so as to avoid damage caused by shaking and knocking against other objects during transportation. After the 3D printing device stops transportation, the fastening member unlocks the pump body from the shell, so that the pump body can restore the floating up and down state and reduce the vibration transmission of the pump body to the shell.

[0073] Please refer to Figure 2 In some embodiments, the air pump assembly 100 further comprises a pipeline 4, one end of the pipeline 4 is connected to the air inlet, and external air can enter the pump body 1 through the pipeline 4 and the air inlet. In some embodiments, the working cavity is provided with an air inlet hole, and one end of the pipeline 4 is connected to the air inlet and the other end extends out of the working cavity through the air inlet hole, so that the pump body 1 can take air from outside the working cavity, avoid pollution of the pump body 1 by printing waste in the working cavity, and improve the stability of the operation of the air pump assembly 100.

[0074] In some embodiments, the air pump assembly 100 further comprises a filter assembly 5, and the pipeline 4 is connected between the filter assembly 5 and the air inlet. The filter assembly 5 can be activated carbon, can be filter cotton, and can also be other filters with filtering function, which are not limited in the present application. The filter assembly 5 is used for filtering the gas entering the pump body 1, so as to reduce the influence of impurities and pollutants in the air on the internal environment of the pump body 1 and improve the stability of the operation of the air pump assembly 100.

[0075] The filter assembly 5 can be arranged on the bracket 3, or can be arranged separately from the bracket 3. In some embodiments, the filter assembly 5 is arranged separately from the bracket 3, and is arranged on a side of the housing away from the working cavity. That is, the filter assembly 5 is arranged outside the housing of the 3D printing device. In this way, the user can conveniently observe the use of the filter assembly 5, so as to replace and maintain the filter assembly 5 in time. At the same time, the external arrangement of the filter assembly 5 enables the user to replace the filter assembly 5 outside the housing, so that the 3D printing device housing is not disassembled, the difficulty of replacing the filter assembly 5 is reduced, and the user experience is improved.

[0076] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like refer to the orientation or positional relationship based on the drawings described, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0077] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that all or part of the above-mentioned processes can be implemented, and equivalent changes made according to the claims of the present application, still belong to the scope covered by the present application.

Claims

1. An air pump assembly, characterized by, The air pump assembly comprises: a pump body; a damping member, one end of which is connected with the pump body and the other end of which is used to extend into a support body to mount the pump body on the support body.

2. The air pump assembly of claim 1, wherein, The air pump assembly further comprises a support configured as the support body, the support being provided with a mounting hole, and the damping member extending into the mounting hole.

3. The air pump assembly of claim 2, wherein, The pump body comprises a first pump face and a second pump face arranged adjacently; the support comprises a first support part and a second support part connected with each other, the first support part being provided with a first mounting hole and the second support part being provided with a second mounting hole; the damping member comprises a first damping member and a second damping member; one end of the first damping member is connected with the first pump face and the other end of the first damping member extends into the first mounting hole; one end of the second damping member is connected with the second pump face and the other end of the second damping member extends into the second mounting hole.

4. The air pump assembly of claim 3, wherein, The support further comprises a support spring plate, the support spring plate comprising a connecting part and an elastic part connected with each other, the connecting part being connected with the second support part on a side away from the pump body; the elastic part is arranged in a first direction opposite to the second support part at a distance, the second damping member passing through the second mounting hole and being in contact with the elastic part.

5. The air pump assembly of claim 4, wherein, The elastic part is provided with a third mounting hole; the second damping member comprises a first shaft section and a second shaft section, the shaft diameter of the first shaft section being greater than the shaft diameter of the second shaft section; the first shaft section and the second shaft section have a stepped surface therebetween, the second shaft section extending into the mounting hole, and the stepped surface being in contact with a side of the elastic part facing the second support part.

6. The air pump assembly of claim 3, wherein, The support further comprises a third support part, the third support part being connected with the first support part and being arranged in the first direction opposite to the second support part; the pump body further comprises a third pump face, the third pump face being arranged in the first direction opposite to the second pump face, and the third pump face being in contact with the third support part.

7. A gas pump assembly according to any one of claims 2 to 6, wherein, The pump body has an air inlet; the air pump assembly further comprises a pipeline and a filter assembly, the filter assembly being arranged at a distance from the support; the pipeline is connected between the filter assembly and the air inlet.

8. The air pump assembly of any one of claims 1-6, wherein, The air pump assembly further comprises a fastener, the fastener being used to connect between the pump body and the support body to lock the pump body on the support body.

9. A 3D printing device, characterized by The 3D printing device comprises a tool head used to connect a laser head and the air pump assembly in communication with the laser head.

10. The 3D printing device of claim 9, wherein, The 3D printing device further comprises a shell formed with a working cavity, the air pump assembly being mounted in the working cavity along the height direction of the working cavity.

11. The 3D printing device of claim 10, wherein, The shell is configured as a support body, the shell being provided with a fourth mounting hole, and the damping member extending into the fourth mounting hole, or the air pump assembly further comprises a support, the support comprising a support part and a connecting part connected with each other, the connecting part being connected with the cavity wall of the working cavity; the support part being provided with a mounting hole, and the damping member extending into the mounting hole.

12. The 3D printing device of claim 11, wherein, The pump body is arranged at a distance from the cavity wall of the working cavity.

13. The 3D printing device of claim 10, wherein, The working cavity is provided with an air inlet hole, the pump body has an air inlet, and the air pump assembly further comprises a pipeline. One end of the pipeline is connected with the air inlet, and the other end extends out of the working cavity through the air inlet hole.

14. The 3D printing device of claim 13, wherein, The air pump assembly further comprises a filter assembly arranged on the side of the shell away from the working cavity. The pipeline is connected with the filter assembly.

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