CN114645836B

CN114645836B - Vacuumizing device

Info

Publication number: CN114645836B
Application number: CN202011495782.2A
Authority: CN
Inventors: 黎少情; 朱建峰
Original assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Current assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2024-03-15
Anticipated expiration: 2040-12-17
Also published as: CN114645836A

Abstract

The invention relates to a vacuum pumping device. The vacuumizing device comprises: the vacuumizing assembly comprises a connecting pipe and a mounting seat movably connected with the connecting pipe, and a vacuumizing channel is formed in the connecting pipe; the quick-change assembly is detachably arranged on the mounting seat and comprises a quick-change head and a sealing element, the sealing element is contained in the quick-change head, and an introduction channel is formed between the sealing element and the quick-change head in a communicating manner; the quick-change head has a locking state locked on the mounting seat and an unlocking state moving relative to the mounting seat; the connecting pipe can move relative to the mounting seat so as to press the sealing element on the quick-change head in a locking state, so that the vacuumizing channel is communicated with the leading-in channel, and the quick-change assembly is pushed away from the mounting seat in an unlocking state. The vacuumizing device can be replaced by the real sealing ring without disassembling the vacuumizing device, so that the vacuumizing device is simple to operate, high in replacing efficiency and short in time consumption.

Description

Vacuumizing device

Technical Field

The invention relates to the technical field of vacuumizing equipment, in particular to a vacuumizing device.

Background

At present, when carrying out the evacuation operation to the product, evacuating device embeds sealing washer and compresses tightly the piece, extrudees the sealing washer through compressing tightly the piece, and the sealing washer seals between the extraction opening of compressing tightly piece and product to make and compress tightly the better air extraction passageway of gas tightness of formation between piece and the product. However, since the seal ring is repeatedly pressed and easily damaged, the seal ring needs to be replaced periodically. The current operation mode is to manually detach the vacuumizing device, and the operation mode is time-consuming and labor-consuming and has lower operation efficiency by manually replacing the sealing ring.

Disclosure of Invention

Based on the above, it is necessary to provide a vacuum pumping device with simple operation and high replacement efficiency for replacing the sealing ring.

A vacuum-pumping apparatus, comprising:

the vacuumizing assembly comprises a connecting pipe and a mounting seat movably connected with the connecting pipe, and a vacuumizing channel is formed in the connecting pipe;

the quick-change assembly is detachably arranged on the mounting seat and comprises a quick-change head and a sealing element, the sealing element is contained in the quick-change head, and an introduction channel is formed between the sealing element and the quick-change head in a communicating manner; the quick-change head is provided with a locking state locked on the mounting seat and an unlocking state moving relative to the mounting seat;

the connecting pipe can move relative to the mounting seat, so that the sealing piece is pressed on the quick-change head in the locking state, the vacuumizing channel is communicated with the guide-in channel, and the quick-change assembly is pushed away from the mounting seat in the unlocking state.

In the vacuum pumping device, after the quick-change head is mounted on the mounting seat, the quick-change head and the mounting seat are locked, and along with the movement of the connecting pipe relative to the mounting seat, the connecting pipe can be propped against the sealing piece and tightly pressed on the quick-change head, so that the sealing piece is tightly contacted with the connecting pipe, and the sealing piece is tightly contacted with the quick-change head, so that the vacuum pumping channel is communicated with the guide-in channel, and the vacuum pumping device has good sealing performance. When the sealing element needs to be replaced, the quick-change head and the mounting seat are unlocked, and the sealing element and the quick-change head can be synchronously pushed away from the mounting seat by enabling the connecting pipe to continuously push the sealing element. Therefore, the automatic replacement of the sealing piece of the vacuumizing device can be realized by only automatically controlling the relative movement of the connecting pipe and the mounting seat and the locking and unlocking of the quick-change seat, and the vacuumizing device is not required to be disassembled, so that the operation is simple, the replacement efficiency is high, and the time consumption is short.

In one embodiment, the mounting seat is provided with a mounting hole in a penetrating manner, and the quick-change assembly is mounted in the mounting hole; the vacuumizing device comprises a locking assembly, and the locking assembly can automatically lock the quick-change head in the mounting hole.

In one embodiment, a through hole communicated with the mounting hole is formed in the side wall of the mounting seat; the locking assembly is fixedly connected to the mounting seat and comprises a first driving piece and clamping jaws connected with the first driving piece, and the first driving piece can drive the clamping jaws to extend into the through holes to hold the quick-change head tightly or drive the clamping jaws to withdraw from the through holes to release the quick-change head.

In one embodiment, the mounting seat is provided with an adjusting hole, the axial direction of the adjusting hole is parallel to the axial direction of the mounting hole, and the adjusting hole is communicated with the through hole; the locking assembly comprises a spring plunger which is in threaded connection with the adjusting hole and can extend into the through hole to be clamped with the clamping jaw in the locking state.

In one embodiment, a flange is formed on an outer wall surface of the quick-change head, and in the locked state, the flange can abut against the locking assembly in an axial direction of the mounting hole.

In one embodiment, the flange is in clearance fit with the inner wall surface of the mount; and/or the flange extends along the circumferential direction of the quick-change head to form a ring shape, and the flange is formed with a conical surface which gradually contracts along the direction towards the connecting pipe.

In one embodiment, the quick-change head is provided with a containing groove, and the sealing element is contained in the containing groove and can be pressed on the bottom wall of the containing groove under the action of the connecting pipe; the bottom wall of the accommodating groove is provided with a first through hole in a penetrating mode, the sealing piece is provided with a second through hole, and the first through hole and the second through hole are communicated to form the guide-in channel together.

In one embodiment, the first through hole is tapered gradually shrinking along a direction approaching the accommodating groove.

In one embodiment, the second via hole includes a straight pipe section and a taper pipe section, a small opening end of the taper pipe section is connected with the straight pipe section, a large opening end of the taper pipe section is opposite to the first via hole, and a caliber of one end of the first via hole, which is close to the sealing member, is smaller than a caliber of the large opening end of the taper pipe section.

In one embodiment, the vacuum pumping assembly comprises a second driving member connected with the mounting seat so as to drive the mounting seat to move relative to the connecting pipe.

Drawings

FIG. 1 is a schematic diagram of a vacuum apparatus according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the vacuum apparatus shown in FIG. 1;

FIG. 3 is an exploded view of the mounting block and locking assembly of the vacuum apparatus of FIG. 1;

fig. 4 is an exploded view of the mounting base and quick-change assembly of the vacuum apparatus shown in fig. 2.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may 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 may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 4, a vacuum apparatus 10 according to an embodiment of the present invention is used for performing a vacuum operation on a product. For example, for hollow ultrathin radiating fins in electronic products such as notebook computers and mobile phones, the intermediate state 20 is composed of a main body 21 and a needle tube 22 connected with the main body 21 in the manufacturing process, and in the subsequent processing, the needle tube 22 is cut off, and the rest of the main body 21 is the final product. In the vacuum operation, the vacuum-pumping apparatus 10 is connected to the needle tube 22, thereby vacuum-pumping the main body 21.

In particular, in the present embodiment, the vacuum apparatus 10 includes a vacuum pumping assembly 30 and a quick-change assembly 90. The vacuum pumping assembly 30 comprises a connecting pipe 300 and a mounting seat 400 movably connected with the connecting pipe 300, wherein a vacuum pumping channel 310 is formed in the connecting pipe 300. The quick-change assembly 90 is removably mounted to the mount 400. The quick-change assembly 90 includes a quick-change head 910 and a sealing member 930, wherein the sealing member 930 is accommodated inside the quick-change head 910, and an introduction channel 950 is formed between the sealing member 930 and the quick-change head 910. The quick-change head 910 has a locked state locked to the mount 400 and an unlocked state movable relative to the mount 400. The connecting tube 300 is movable relative to the mounting block 400 to compress the sealing member 930 against the quick-change head 910 in the locked state, to communicate the evacuation channel 310 with the introduction channel 950, and to push the quick-change assembly 90 away from the mounting block 400 in the unlocked state.

In use, needle cannula 22 is inserted into introduction channel 950 and extends into seal 930, and seal 930 is capable of holding needle cannula 22 due to its resiliency, such that evacuation channel 310 communicates with the passageway within the product to effect evacuation of the product.

In the above-mentioned vacuum pumping apparatus 10, after the quick-change head 910 is mounted on the mounting seat 400, the quick-change head 910 and the mounting seat 400 are locked, and along with the movement of the connecting pipe 300 relative to the mounting seat 400, the connecting pipe 300 can be abutted against the sealing member 930, and the sealing member 930 is pressed against the quick-change head 910, so that the sealing member 930 and the connecting pipe 300, and the sealing member 930 and the quick-change head 910 are in close contact, so that the vacuum pumping channel 310 is communicated with the introducing channel 950 and has good sealing property. When the sealing member 930 needs to be replaced, the quick-change head 910 and the mounting seat 400 are unlocked, and the sealing member 930 and the quick-change head 910 can be synchronously pushed away from the mounting seat 400 by enabling the connecting pipe 300 to continuously push the sealing member 930. Thus, the automatic replacement of the sealing member 930 of the vacuumizing device 10 can be realized by automatically controlling the relative movement of the connecting pipe 300 and the mounting seat 400 and the locking and unlocking of the quick-change seat, and the vacuumizing device 10 is not required to be disassembled, so that the operation is simple, the replacement efficiency is higher, and the time consumption is shorter.

It should be noted that the quick-change head 910 and the sealing member 930 are mounted on the mounting base 400 together or removed together as a mating structure. For the quick-change assembly 90 removed from the mounting block 400, a certain number of sealing members 930 can be manually replaced inside the quick-change head 910 after the quick-change assembly is accumulated, so that the quick-change head 910 can be continuously used, thereby reducing the production cost.

Referring to fig. 2 to 3, in this embodiment, a mounting hole 410 is formed in the mounting seat 400 in a penetrating manner, and the quick-change assembly 90 is mounted in the mounting hole 410. The vacuum apparatus 10 includes a locking assembly 50, the locking assembly 50 being capable of automatically locking the quick-change head 910 into the mounting hole 410. By abutting the connection tube 300 with the sealing member 930 inside the mounting hole 410, a relatively closed environment can be provided to improve the connection tightness between the connection tube 300, the sealing member 930 and the quick connector.

Specifically, the mounting hole 410 is stepped, the quick-change head 910 can be introduced into the mounting hole 410 from the end with the larger diameter of the mounting hole 410 and is abutted against the step in the mounting hole 410, and the connection pipe 300 can be introduced into the mounting hole 410 from the end with the smaller diameter of the mounting hole 410 and is abutted against the sealing member 930 in the quick-change head 910. Specifically, the quick-change head 910 is provided with a receiving groove 911, and the sealing member 930 is received in the receiving groove 911 and can be pressed against the bottom wall of the receiving groove 911 by the connecting pipe 300. Further, the end surface area of the connection pipe 300 is smaller than or equal to the end surface area of the sealing member 930 so as to be capable of being completely abutted against the end surface of the sealing member 930 without being capable of being abutted against the quick-change head 910 so as not to be capable of pressing the sealing member 930.

Referring to fig. 2 and 3, in this embodiment, a through hole 420 communicating with the mounting hole 410 is formed on a side wall of the mounting seat 400, and the locking assembly 50 can automatically clamp the quick-change head 910 through the through hole 420. Specifically, the locking assembly 50 is fixedly coupled to the mounting block 400. The locking assembly 50 includes a first driving member 510 and a clamping jaw 520 connected to the first driving member 510, wherein the first driving member 510 can drive the clamping jaw 520 to extend into the through hole 420 to hold the quick-change head 910, or drive the clamping jaw 520 to withdraw from the through hole 420 to release the quick-change head 910. Further, the two through holes 420 are two, the clamping jaw 520 includes two clamping portions, the two clamping portions are in one-to-one correspondence with the two through holes 420, and the two clamping portions are driven by the first driving member 510 to approach each other and respectively extend into the through holes 420, so as to hold the quick-change head 910 together from two sides of the quick-change head 910. Since the locking assembly 50 is mounted on the mounting base 400 and fixed relative to the mounting base 400, the quick-change head 910 is locked relative to the mounting base 400 after the locking assembly 50 holds the quick-change head 910 tightly.

Specifically, the clamping portion has a clamping surface 521, and the shape of the clamping surface 521 is adapted to the shape of the outer surface of the quick-change head 910, so as to be attached to the quick-change head 910 and have a larger contact area. In this embodiment, the quick-change head 910 has a cylindrical shape, and the clamping surface 521 is an arc surface that can be bonded to the outer wall surface of the quick-change head 910. Specifically, the first driving member 510 is a jaw cylinder capable of driving the two clamping portions to open or close. Specifically, the locking assembly 50 includes a first connecting plate 530, the first connecting plate 530 is fixedly connected to the mounting base 400, and the first driving member 510 is mounted on the first connecting plate 530.

In this embodiment, the mounting seat 400 is provided with an adjusting hole 430, the axial direction of the adjusting hole 430 is parallel to the axial direction of the mounting hole 410, and the adjusting hole 430 is communicated with the through hole 420. The locking assembly 50 includes a spring plunger 540, the spring plunger 540 being threadably coupled to the adjustment aperture 430 and being capable of extending into the through aperture 420 to engage the jaws 520 in a locked condition. By providing the spring plunger 540 to engage the clamping jaw 520 when the clamping jaw 520 clamps the quick-change head 910, the quick-change assembly 90 is prevented from forcing the clamping jaw 520 to withdraw along the through-hole 420 under the pushing force of the connecting tube 300, thereby achieving the purpose of locking the clamping jaw 520 to the through-hole 420.

Specifically, the spring plunger 540 includes a plunger, a spring and a marble, wherein a movable channel is formed inside the plunger, the spring is accommodated in the movable channel, and applies an elastic force to the marble to press the marble against the end of the movable channel, so that a part of the marble protrudes out of the plunger. The clamping jaw 520 is provided with a limiting hole 522, and when the clamping jaw 520 clamps the quick-change head 910, the marble can be just clamped into the limiting hole 522 under the elastic force of the spring, so that the clamping jaw 520 is locked. Specifically, the surface of the marble is spherical, and under the driving action of the first driving member 510, the clamping jaw 520 can force the marble to press the spring to be accommodated in the plunger, so that the clamping jaw 520 can withdraw from the through hole 420. Specifically, by rotating the spring plunger 540, the spring plunger 540 may be moved in the axial direction of the adjustment bore 430 to adjust the length of the spring plunger 540 extending into the through bore 420 to ensure that the spring plunger 540 is able to engage the jaws 520.

As shown in fig. 2 and 4, in the present embodiment, a flange 912 is formed on the outer wall surface of the quick-change head 910, and in the locked state, the flange 912 can abut against the locking assembly 50 in the axial direction of the mounting hole 410. When the connecting tube 300 applies pressure to the sealing member 930 along the axial direction of the mounting hole 410, the abutment of the flange 912 with the locking assembly 50 can ensure that the quick-change head 910 is stably maintained on the locking assembly 50, so that the quick-change head 910 is prevented from moving relative to the locking assembly 50.

Specifically, the flange 912 extends in a ring shape along the circumferential direction of the quick-change head 910, and the flange 912 is formed with a tapered surface 913 gradually shrinking in a direction toward the connection pipe 300. Thus, when the quick-change head 910 is mounted in the mounting hole 410, the tapered surface 913 can perform the guiding function, so that the quick-change head 910 can quickly enter the mounting hole 410. In addition, the inner diameter of the mounting hole 410 is matched with the outer diameter of the flange 912, and only the flange 912 of the quick-change head 910 is in contact with the inner wall of the mounting hole 410, so that the contact area between the quick-change head 910 and the mounting hole 410 can be reduced, and the quick-change head 910 is prevented from being subjected to larger friction resistance when being guided into the mounting hole 410. Specifically, flange 912 abuts against the side of the clamping portion facing connecting tube 300. In some embodiments, flange 912 is a clearance fit with the inner wall surface of mount 400 to facilitate easier introduction of quick-change head 910 into mounting hole 410, and also to facilitate easier removal of quick-change head 910 from mounting hole 410 when quick-change assembly 90 is removed.

Specifically, in the present embodiment, a first through hole 914 is formed in the bottom wall of the accommodating groove 911, a second through hole 931 is formed in the sealing member 930, and the first through hole 914 and the second through hole 931 are communicated to form the introducing channel 950. When the connecting pipe 300 compresses the sealing member 930 and compresses the sealing member 930 on the bottom wall of the accommodating groove 911, the first through hole 914 and the second through hole 931 are communicated and have good sealing performance, and meanwhile, the connecting pipe 300 is closely abutted against the sealing member 930, so that the second through hole 931 and the vacuumizing channel 310 are communicated and have good sealing performance, and therefore, the introducing channel 950 and the vacuumizing channel 310 are communicated with each other with good sealing performance. It should be noted that needle cannula 22 is capable of entering and extending into second throughbore 931 via first throughbore 914, and that superior sealing is achieved by sealing member 930 resiliently gripping needle cannula 22, thereby enabling communication between evacuation passageway 310 and needle cannula 22.

Specifically, the first via 914 has a tapered shape gradually shrinking along a direction approaching the accommodating groove 911. It will be appreciated that needle cannula 22 can be accessed via the large mouth end of first via 914 and guided through first via 914 to second via 931, the tapered design of first via 914 may provide a guiding effect for needle cannula 22.

Specifically, the second through hole 931 includes a straight pipe section 931a and a tapered pipe section 931b, a small opening end of the tapered pipe section 931b is connected to the straight pipe section 931a, a large opening end of the tapered pipe section 931b is opposite to the first through hole 914, and a caliber of an end of the first through hole 914 close to the sealing member 930 is smaller than a caliber of the large opening end of the tapered pipe section 931 b. Thus, under the guiding action of the first through hole 914, the needle tube 22 can smoothly enter the large opening end of the taper pipe section 931b and enter the straight pipe section 931a through the small opening end of the taper pipe section 931 b. Straight tube section 931a has a diameter smaller than that of needle cannula 22, and after needle cannula 22 enters straight tube section 931a, straight tube section 931a is inflated so that the inner wall of straight tube section 931a is tightly attached to needle cannula 22, thereby enabling seal 930 to grip needle cannula 22 and having a good seal with needle cannula 22.

Referring to fig. 1 and fig. 2 again, in the embodiment, the vacuum pumping assembly 30 includes a second driving member 210, and the second driving member 210 is connected to the mounting base 400 to drive the mounting base 400 to move relative to the connecting tube 300, so as to compress the quick-change assembly 90 locked in the mounting base 400 by the connecting tube 300. Specifically, the vacuum pumping assembly 30 includes a second connection plate 220 connected to the connection pipe 300, and the second driving member 210 is mounted on the second connection plate 220. Specifically, the second driving member 210 is an air cylinder, the cylinder body of the air cylinder is mounted on the second connecting plate 220, the piston of the air cylinder is connected with the mounting seat 400, and the piston drives the mounting seat 400 and the locking assembly 50 to move to approach or separate from the connecting pipe 300. Specifically, the vacuum pumping assembly 30 further includes a deaerator (not shown) and a conductive pipe 230, one end of the conductive pipe 230 is connected to the deaerator, and the other end is connected to the second connection plate 220. The second connection plate 220 is formed with a through hole capable of communicating the connection pipe 300 and the connection pipe 230, so that the deaerator can perform a vacuum operation on the product through the connection pipe 230, the second connection plate 220 and the connection pipe 300. In other embodiments, the second connection plate 220 may be omitted, thereby directly connecting the conductive pipe 230 with the connection pipe 300. Alternatively, the conductive pipe 230, the second connection plate 220, and the connection pipe 300 may be integrally formed.

As shown in fig. 2 to 4, specifically, the mounting base 400 includes a first connecting portion 440 and a second connecting portion 450, the first connecting portion 440 has a plate shape, the second connecting portion 450 has a cylindrical shape, and the second connecting portion 450 is connected to the first connecting portion 440, so that the mounting base has a T shape. The second driving member 210 is connected to the second connecting portion 450, and the quick-change assembly 90 is installed inside the second connecting portion 450. The mounting hole 410 penetrates the first connection portion 440 and the second connection portion 450.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A vacuum-pumping apparatus, comprising:

the connecting pipe can move relative to the mounting seat so as to press the sealing element on the quick-change head in the locking state, so that the vacuumizing channel is communicated with the guide-in channel, and the quick-change assembly is pushed away from the mounting seat in the unlocking state;

the mounting seat is provided with a mounting hole in a penetrating manner, and the quick-change assembly is mounted in the mounting hole; the vacuumizing device comprises a locking assembly, and the locking assembly can automatically lock the quick-change head in the mounting hole;

the side wall of the mounting seat is provided with a through hole communicated with the mounting hole; the locking component is fixedly connected to the mounting seat and comprises a first driving piece and a clamping jaw connected with the first driving piece, and the first driving piece can drive the clamping jaw to extend into the through hole to hold the quick-change head tightly or drive the clamping jaw to withdraw from the through hole to release the quick-change head;

the mounting seat is provided with an adjusting hole, the axial direction of the adjusting hole is parallel to the axial direction of the mounting hole, and the adjusting hole is communicated with the through hole; the locking assembly comprises a spring plunger which is in threaded connection with the adjusting hole and can extend into the through hole to be clamped with the clamping jaw in the locking state.

2. The vacuum extractor of claim 1 wherein a flange is formed on an outer wall surface of the quick-change head, the flange being capable of abutting the locking assembly in an axial direction of the mounting hole in the locked state.

3. The vacuum extractor of claim 2 wherein the flange is in clearance fit with the inner wall surface of the mount; and/or the flange extends along the circumferential direction of the quick-change head to form a ring shape, and the flange is formed with a conical surface which gradually contracts along the direction towards the connecting pipe.

4. The vacuum pumping device according to claim 1, wherein the quick-change head is provided with a containing groove, and the sealing element is contained in the containing groove and can be pressed against the bottom wall of the containing groove under the action of the connecting pipe; the bottom wall of the accommodating groove is provided with a first through hole in a penetrating mode, the sealing piece is provided with a second through hole, and the first through hole and the second through hole are communicated to form the guide-in channel together.

5. The vacuum pumping apparatus as defined in claim 4, wherein the first through-hole has a tapered shape that gradually contracts in a direction approaching the receiving groove.

6. The vacuum extractor of claim 4 wherein the second via includes a straight tube section and a tapered tube section, the small end of the tapered tube section is connected to the straight tube section, the large end of the tapered tube section is opposite to the first via, and the diameter of the end of the first via near the seal is smaller than the diameter of the large end of the tapered tube section.

7. The vacuum assembly of claim 1, wherein the vacuum assembly includes a second drive member coupled to the mount for driving movement of the mount relative to the connecting tube.