CN215110520U - Lifting shaft sealing structure and 3D printing device - Google Patents

Abstract

The utility model belongs to the technical field of 3D prints, a lift axle seal structure and 3D printing device is disclosed, lift axle seal structure installs in 3D printing device, lift axle seal structure includes flange and sealing washer, 3D printing device's lift axle wears to locate the flange, flange mounting is equipped with the seal groove on 3D printing device's shaping room bottom and flange, the sealing washer is arranged in the seal groove with sealing flange and lift axle, still set up the hole of aerifing of intercommunication flange and lift inter-axial clearance on the flange, aerify the hole and be configured as blow the powder in the clearance to the shaping room when filling inert gas. Through seting up the gas charging hole on the flange to through filling into inert gas to the gas charging hole, inert gas can be with the powder reversal blow to the shaping indoor in getting into the clearance, effectively avoids the powder to sealing washer and lift axle wearing and tearing, and then avoids the sealing washer inefficacy or the gas leakage appears, leads to the condition appearance that the indoor vacuum of shaping can not reach the requirement.

Description

Lifting shaft sealing structure and 3D printing device

Technical Field

The utility model relates to a 3D prints technical field, especially relates to a lift axle seal structure and 3D printing device.

Background

The flange is a part for connecting the shafts and is used for connecting pipe ends; also there is the flange on equipment import and export, to 3D printing apparatus, current 3D printing apparatus includes forming chamber and forming cylinder, the forming cylinder includes the lift axle, the lift axle passes through the flange and is located the sealing washer seal installation in the forming chamber of flange, this lift axle is the part of upper and lower motion in atmosphere and vacuous forming chamber, the power supply is motor drive, the lift axle needs descend according to prescribed stroke when printing, and need guarantee that the forming chamber is inside to be the high vacuum state at the printing in-process, so need use the flange to connect and be equipped with the sealing washer simultaneously and realize sealedly, both guarantee the normal motion of lift axle and guaranteed the isolation of forming chamber and atmospheric environment.

When the evacuation or print the in-process and have the powder and float or pile up at the inside of forming chamber, like this because the particle diameter of powder is very little, print for a long time, the lift in-process of lift axle inevitable can have the powder adhesion on the lift axle or fall the sealed surface of inside lift axle, because the lift axle is regular elevating movement, so it has the powder to get into sealed position along with the lift axle at the in-process that descends, the powder can rub the sealing washer between sealing washer and lift axle, can accelerate the wearing and tearing of sealing washer like this, lead to the sealing washer inefficacy or appear leaking gas, vacuum in the forming chamber can't reach the requirement, damage the lift axle even.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lift axle seal structure and 3D printing device to solve the powder wearing and tearing sealing washer, lead to the sealing washer inefficacy or the problem that leaks gas appear.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a lift axle seal structure, installs in 3D printing device, lift axle seal structure includes flange and sealing washer, 3D printing device's lift axle is worn to locate the flange, flange mounting in 3D printing device's shaping room bottom just be equipped with the seal groove on the flange, the sealing washer is arranged in the seal groove with sealed the flange with the lift axle, the intercommunication has still been seted up on the flange with the inflation hole in clearance between the lift axle, inflation hole is configured to be when filling into inert gas will powder in the clearance blows to the shaping room.

Preferably, the sealing rings are arranged in a plurality, along the axial direction of the lifting shaft, one end, communicated with the gap, of the inflating hole is located at the downstream of the first sealing ring, and the first sealing ring is close to the sealing ring of the forming chamber.

Preferably, the number of the inflation holes is at least two, and the at least two inflation holes are circumferentially arranged on the flange.

Preferably, the lifting shaft further comprises an inner sealing element, and the inner sealing element is arranged in the forming chamber and sleeved outside the lifting shaft.

Preferably, the inner seal is filled with a fiber rope.

Preferably, the flange is provided with a shoulder, the bottom of the forming chamber is provided with a sinking groove, and the shoulder is arranged in the sinking groove.

Preferably, a second sealing ring is arranged between the flange and the bottom of the forming chamber.

The utility model also provides a 3D printing device, including foretell lift axle seal structure.

Preferably, the lifting shaft sealing structure further comprises an inflating device, wherein the inflating device is communicated with the inflating hole of the lifting shaft sealing structure and is used for inflating inert gas into the inflating hole.

Preferably, the inflation device intermittently inflates the inflation hole with an inert gas.

The utility model has the advantages that:

through seting up the gas charging hole on the flange to through filling into inert gas to the gas charging hole, inert gas can be with the powder reversal blow to the shaping indoor in getting into the clearance, effectively avoids the powder to sealing washer and lift axle wearing and tearing, and then avoids the sealing washer inefficacy or the gas leakage appears, leads to the condition appearance that the indoor vacuum of shaping can not reach the requirement. In addition, the inside cleanness of flange can also be realized, the stability of 3D printing device operation is improved.

Drawings

Fig. 1 is a schematic structural view of a sealing structure of a lifting shaft provided by the present invention.

In the figure:

1. a flange; 11. a shoulder; 2. a seal ring; 3. an inflation hole; 4. an inner seal; 5. a second seal ring; 10. a lifting shaft; 20. and a forming chamber.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a lift axle seal structure, it is installed on 3D printing device, can avoid the powder to seal ring 2 and the 10 wearing and tearing of lift axle, and then avoids seal ring 2 inefficacy or gas leakage to appear, leads to the condition appearance that vacuum can not reach the requirement in the forming chamber 20.

As shown in fig. 1, the lifting shaft sealing structure comprises a flange 1 and a sealing ring 2, wherein the flange 1 is installed at the bottom of a forming chamber 20 of the 3D printing device, a lifting shaft 10 of the 3D printing device penetrates through the flange 1 and the forming chamber 20, a sealing groove is formed in the flange 1, and the sealing ring 2 is arranged in the sealing groove to seal the flange 1 and the lifting shaft 10.

Still set up the hole of aerifing 3 in the clearance between intercommunication flange 1 and the lift axle 10 on flange 1, through filling into inert gas in the hole of aerifing 3, inert gas can be with the powder blowback in the clearance to shaping room 20, avoids the powder to sealing washer 2 and the wearing and tearing of lift axle 10, can also realize the inside cleanness of flange 1 simultaneously, improves the stability of 3D printing device operation.

In this embodiment, the at least two gas-filling holes 3 are formed in the flange 1, and the at least two gas-filling holes 3 are circumferentially formed in the flange 1, so as to realize rapid and all-directional filling of the inert gas, and further ensure that all the powder entering the gap is blown back into the forming chamber 20.

The sealing rings 2 are provided in plurality, and the sealing rings 2 are arranged at equal intervals in the axial direction of the lifting shaft 10. The end of the said gas filling opening 3 communicating with the gap is located downstream of the first sealing ring, in this embodiment the sealing ring 2, which is located close to the forming chamber 20, in the axial direction of the lifting shaft 10.

In this embodiment, the lifting shaft sealing structure further includes an inner sealing member 4, the inner sealing member 4 is disposed in the forming chamber 20, the inner sealing member 4 is sleeved outside the lifting shaft 10, and the inner sealing member 4 can play a first layer of sealing function to prevent excessive powder in the forming chamber 20 from entering the gap. Preferably, the inner seal 4 is filled with a fiber rope, which is capable of filtering and blocking most of the powder. Further, as shown in fig. 1, the inner seal 4 is formed with a groove for placing an O-ring.

A shoulder 11 is provided at one end of the flange 1, a sink is provided at the bottom of the forming chamber 20, and the shoulder 11 is disposed in the sink to further fix the flange 1. A second gasket 5 is further provided between the flange 1 and the bottom of the molding chamber 20, and the end surface of the flange 1 in contact with the molding chamber 20 can be sealed by the second gasket 5.

The embodiment also provides a 3D printing device which comprises a forming chamber 20, a lifting shaft 10, an inflating device and the lifting shaft sealing structure, wherein the inflating device is communicated with the inflating hole 3 of the lifting shaft sealing structure so as to inflate inert gas into the inflating hole 3.

Preferably, the inflation device intermittently inflates the inflation hole 3 with inert gas, so as to save energy consumption.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a lift axle seal structure, installs in 3D printing device, its characterized in that, lift axle seal structure includes flange (1) and sealing washer (2), 3D printing device's lift axle (10) wear to locate flange (1), flange (1) install in 3D printing device's shaping room (20) bottom just be equipped with the seal groove on flange (1), sealing washer (2) are arranged in with sealed in the seal groove flange (1) with lift axle (10), the intercommunication has still been seted up on flange (1) with aerify hole (3) in clearance between lift axle (10), aerify hole (3) be configured into when filling inert gas with powder in the clearance blows to shaping room (20).

2. The lift shaft seal structure according to claim 1, wherein the seal ring (2) is provided in plurality, and an end of the gas filling hole (3) communicating with the gap is located downstream of a first seal ring, which is the seal ring (2) adjacent to the forming chamber (20), in the axial direction of the lift shaft (10).

3. Lifting shaft sealing structure according to claim 1 or 2, characterized in that the gas filling holes (3) are provided in at least two, at least two gas filling holes (3) being circumferentially open on the flange (1).

4. The lift shaft seal structure of claim 1, further comprising an inner seal (4), the inner seal (4) being disposed within the forming chamber (20) and sleeved outside the lift shaft (10).

5. The lifting shaft seal arrangement according to claim 4, characterised in that the inner seal (4) is filled with fibre rope.

6. The lift shaft seal structure of claim 1, wherein the flange (1) is provided with a shoulder (11), and the bottom of the forming chamber (20) is provided with a sunken groove, and the shoulder (11) is placed in the sunken groove.

7. The lifting shaft seal arrangement according to claim 1, characterised in that a second sealing ring (5) is provided between the flange (1) and the bottom of the forming chamber (20).

8. A 3D printing apparatus comprising the lift shaft sealing structure according to any one of claims 1 to 7.

9. The 3D printing device according to claim 8, further comprising an inflation device in communication with the inflation hole (3) of the lift shaft sealing structure for inflating the inflation hole (3) with an inert gas.

10. The 3D printing device according to claim 9, characterized in that the inflation device intermittently inflates the inflation hole (3) with an inert gas.

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