CN215031221U - Suction means and test sorting facilities - Google Patents

Abstract

The utility model relates to a suction means and test sorting facilities. This suction means includes airtight rotating assembly and suction nozzle subassembly, airtight rotating assembly includes the suction nozzle mount pad, power supply and rotatory suction nozzle axle, the power supply sets up on the suction nozzle mount pad, rotatory suction nozzle axle is connected with the power supply, and receive the drive of power supply and relative suction nozzle mount pad rotates, the suction nozzle subassembly is connected epaxially at rotatory suction nozzle, the epaxial first vacuum gas circuit that is equipped with of rotatory suction nozzle, in order to form the vacuum at the end of suction nozzle subassembly, the end of suction nozzle subassembly is used for being connected with suction nozzle detachably. The suction device has better applicability.

Description

Suction means and test sorting facilities

Technical Field

The utility model relates to the field of mechanical equipment, especially, relate to an absorbing device and test sorting facilities.

Background

With the continuous development and growth of the consumer electronics industry, the industry chain of electronic devices is becoming more and more perfect. The quality and yield of electronic components on products are also gradually increased, and in order to improve the production efficiency and the product quality, it is a great trend to adopt automatic equipment to replace manual picking, placing and assembling.

Due to the high precision of the electronic elements, the electronic elements have high requirements on placing positions, angles and the like in the processes of taking, placing and assembling, the electronic devices have high iteration speed and various shapes, and the high requirements are also provided for the suction mechanism of automatic equipment. However, the conventional rotary suction mechanism has a complex structure and poor universality, affects the replacement and measurement speed of the automation equipment, is difficult to assemble and debug, and cannot meet the requirement of high-precision electronic element production.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a suction device and a test sorting apparatus, so as to solve the problem of inconvenient use of the conventional suction device for electronic components.

The utility model provides a pair of suction means, it includes airtight rotating assembly and suction nozzle subassembly, airtight rotating assembly includes the suction nozzle mount pad, power supply and rotary suction nozzle axle, the power supply sets up on the suction nozzle mount pad, the rotary suction nozzle axle is connected with the power supply, and receive the drive of power supply and relative suction nozzle mount pad rotates, the suction nozzle subassembly is connected epaxially at rotary suction nozzle, be equipped with first vacuum gas circuit in the rotary suction nozzle axle, so that the end at the suction nozzle subassembly forms the vacuum, the end of suction nozzle subassembly is used for being connected with suction nozzle detachably.

So set up, suction device's suction nozzle subassembly is installed on the rotary suction nozzle axle, when the power supply drive rotary suction nozzle axle rotates, can be driven and rotate by the rotary suction nozzle axle to the different angle of adjustment. And all install power supply and rotatory suction nozzle axle etc. on the suction nozzle mount pad for the structure is compacter, and has guaranteed that power supply and rotatory suction nozzle axle have good axiality, has avoided the problem of installation and debugging difficulty that many parts switching leads to among the prior art. The first vacuum air path on the rotary suction nozzle shaft can form vacuum at one end, far away from the suction nozzle mounting seat, of the tail end of the suction nozzle assembly, so that the electronic component to be tested can be adsorbed through the vacuum. And because the end of the suction nozzle component is used for being detachably connected with the suction nozzle, the suction nozzle component can adapt to different electronic components, the adaptability is improved, and the suction nozzle component can be quickly replaced.

Optionally, the power source includes a step motor, and the sealed rotating assembly further includes a positioning detection assembly, which is connected to the step motor and detects a rotation angle of the step motor.

So set up, can confirm the control stability of step motor.

Optionally, the positioning detection assembly comprises: the origin sensor is arranged on the suction nozzle mounting seat; the origin separation blade is provided with the clearing hole that supplies light to pass through on the origin separation blade, and the origin separation blade sets up on step motor to step motor rotates at any time, when the clearing hole of origin separation blade reached origin sensor, makes origin sensor light path switch on, and confirms step motor's rotation zero point.

So set up, can make change to step motor's rotation to promote the control accuracy.

Optionally, the closed rotating assembly further comprises a plurality of rotary bearing parts, and the plurality of rotary bearing parts are sequentially sleeved outside the rotary suction nozzle shaft at intervals along the axial direction of the rotary suction nozzle shaft.

So set up, can guarantee the stability and the reliability of rotatory suction nozzle axle.

Optionally, a flange is arranged on a portion of the rotary suction nozzle shaft extending out of the suction nozzle mounting seat, a second vacuum air path is arranged on the flange, the second vacuum air path is communicated with the first vacuum air path, and an outlet of the second vacuum air path is located on the bottom surface of the flange.

So set up, can expand the branch road to satisfy different suction nozzle quantity.

Optionally, the hermetic rotating assembly further comprises a conductive structure in contact with the rotary suction nozzle shaft for electrostatic protection of the rotary suction nozzle shaft.

So set up, can carry out electrostatic protection to airtight rotating assembly.

Optionally, the closed rotating assembly further comprises a retainer ring sleeved outside the rotating suction nozzle shaft, the conductive structure is arranged in the retainer ring and arranged in the retainer ring, the conductive structure comprises a conductive body, a jackscrew and a first pressure spring, the first pressure spring is tightly jacked on the conductive body by the jackscrew, and the conductive body is in contact with the rotating suction nozzle shaft.

Thus, the reliability of the electrostatic protection can be determined.

Optionally, the nozzle assembly comprises a first cushioning structure comprising: the buffer shaft sleeve is connected with the rotary suction nozzle shaft and rotates along with the rotary suction nozzle shaft, and a guide groove is formed in the buffer shaft sleeve; the buffer shaft extends into the buffer shaft sleeve, a second pressure spring is arranged at one end of the buffer shaft extending into the buffer shaft sleeve, and a mounting hole is formed in the buffer shaft; the limiting piece penetrates through the guide groove and the mounting hole to limit the stroke of the buffer shaft relative to the buffer shaft sleeve; the suction nozzle installed part, the suction nozzle installed part sets up in the buffering axle, and the suction nozzle installed part is used for being connected with suction nozzle detachably.

So set up, can cushion absorbing the material to promote the reliability.

Optionally, the suction nozzle assembly comprises a suction nozzle connecting plate and a second buffer structure, the suction nozzle connecting plate is connected with the rotary suction nozzle shaft and rotates along with the rotary suction nozzle shaft, a vacuum switching air passage is arranged on the suction nozzle connecting plate and connected with the first vacuum air passage, and the second buffer structure is connected with the suction nozzle connecting plate and communicated with the first vacuum air passage through the vacuum switching air passage.

So set up, can use a plurality of suction nozzles to carry out the material as required and absorb.

According to another aspect of the present application, there is provided a test sorting apparatus comprising the suction device described above.

Thus, the reliability and adaptability of the test sorting device can be determined.

Drawings

Fig. 1 is a schematic perspective view of a suction device according to an embodiment of the present invention;

fig. 2 is a schematic perspective exploded view of a closed rotating assembly of a suction device according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural view of a sealed rotating assembly of a suction device according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a rotary nozzle shaft of a suction device according to an embodiment of the present invention;

fig. 5 is a schematic perspective exploded view of a nozzle assembly of a suction device according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a first buffer structure of a suction device according to an embodiment of the present invention.

Description of reference numerals:

1. a hermetic rotating assembly; 101. a suction nozzle mounting seat; 102. a stepping motor; 103. rotating the suction nozzle shaft; 104. a coupling; 105. an origin sensor; 106. an origin sensor mounting plate; 107. an origin baffle plate; 108. a pipe joint; 109. a rotary force bearing member; 110. a star-shaped sealing ring; 111. a retainer ring; 112. a first pressure spring; 113. an electrical conductor; 114. carrying out top thread; 2. a suction nozzle assembly; 20. a first buffer structure; 201. a buffer shaft sleeve; 202. a buffer shaft; 203. a suction nozzle mounting part; 204. a limiting member; 205. a clamp spring; 206. a second pressure spring; 207. a second seal ring; 208. a suction nozzle; 21. a suction nozzle connecting plate; 22. a first seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the present application provides a suction device, which includes a sealed rotation assembly 1 and a suction nozzle assembly 2, where the sealed rotation assembly 1 includes a suction nozzle mounting seat 101, a power source and a rotation suction nozzle shaft 103, the power source is disposed on the suction nozzle mounting seat 101, the rotation suction nozzle shaft 103 is connected to the power source and is driven by the power source to rotate relative to the suction nozzle mounting seat 101, the suction nozzle assembly 2 is connected to the rotation suction nozzle shaft 103, a first vacuum air path is disposed in the rotation suction nozzle shaft 103 to form a vacuum at a tail end of the suction nozzle assembly 2, and the tail end of the suction nozzle assembly 2 is detachably connected to a suction nozzle 208.

The suction nozzle assembly 2 of the suction device is installed on the rotary suction nozzle shaft 103, and can be driven by the rotary suction nozzle shaft 3 to rotate when the power source drives the rotary suction nozzle shaft 103 to rotate, so that different angles can be adjusted. And all install power supply and rotary suction nozzle axle 103 etc. on suction nozzle mount pad 101 for the structure is compacter, and has guaranteed that power supply and rotary suction nozzle axle 103 have good axiality, has avoided the problem of installation and debugging difficulty that many parts switching leads to among the prior art. The first vacuum air path on the rotary nozzle shaft 103 can form a vacuum at the end of the nozzle assembly 2 remote from the nozzle mount 101, thereby enabling the electronic component to be tested to be sucked by the vacuum. Since the tip of the suction nozzle assembly 2 is detachably connected to the suction nozzle 208, it is possible to accommodate various electronic components, which improves the adaptability and enables quick replacement.

When the suction device is used, the suction device moves to the position above a material (such as an electronic component to be detected), vacuum equipment is started, a vacuum gas circuit is connected to the closed rotating assembly 1 and is communicated to the suction nozzle assembly 2, and vacuum is generated at the tail end of the suction nozzle assembly to suck the material; then the suction device rises to the safe position, and the power source receives the instruction and drives airtight rotating assembly 1, suction nozzle assembly 2 rotatory, with the rotatory angle of setting for of material to this satisfies the material and absorbs the demand.

The power source may include a stepper motor 102 or a rotary cylinder, as desired.

Taking the power source of the stepping motor 102 as an example, the stepping motor 102 may be installed above the nozzle mount 101. When the power source includes the stepping motor 102, the sealed rotating assembly 1 further includes a positioning detection assembly, and the positioning detection assembly is connected to the stepping motor 102 and detects a rotation angle of the stepping motor 102. The rotation angle of the stepping motor 102 can be detected by arranging the positioning detection assembly, so that the original point positioning is realized, and the accuracy and precision of the control of the stepping motor 102 are improved.

Optionally, the positioning detection assembly includes an origin sensor 105 and an origin stopper 107, the origin sensor 105 is disposed on the nozzle mount 101; the origin blocking piece 107 is provided with a passing hole through which light passes, the origin blocking piece 107 is arranged on the stepping motor 102 and rotates with the stepping motor 102, and when the passing hole of the origin blocking piece 107 reaches the origin sensor 105, the light path of the origin sensor 105 is conducted and the rotation zero point of the stepping motor 102 is determined.

For example, the origin sensor 105 may be mounted to the suction nozzle mount 101 via an origin sensor mounting plate 106, which contributes to the compactness of the structure. Origin separation blade 107 is installed on step motor's output shaft, and when step motor 102 rotated, origin sensor 105 was in and is sheltered from the state by origin separation blade 107, and when it passed through the clearing hole (this clearing hole can be a breach) on origin separation blade 107, origin sensor 105 light path switched on, realized rotary motion's zero finding from this, guaranteed rotary motion's repeated positioning accuracy.

In the present embodiment, the stepping motor 102 is connected to the rotary nozzle shaft 103 via a coupling 104. The coupling 104 is installed in the nozzle mount 101. Of course, in other embodiments, the stepping motor 102 may be connected to the rotary nozzle shaft 103 through a shaft-engaging component, or an output shaft of the stepping motor 102 may be in hole-shaft engagement with the rotary nozzle shaft 103.

Optionally, the hermetic rotary assembly 1 further includes a plurality of rotary force-bearing members 109, and the plurality of rotary force-bearing members 109 are sequentially sleeved outside the rotary suction nozzle shaft 103 at intervals along the axial direction of the rotary suction nozzle shaft 103.

The rotation bearing member 109 is, for example, a deep groove ball bearing, or an oilless bushing, a ball bushing, or the like. The number of the rotary bearing parts 109 can be two, and the rotary bearing parts are positioned at two ends of the rotary suction nozzle shaft 103 to play roles of rotary support and guide. The use of the dual bearings increases the stability of the operation of the rotary nozzle shaft 103.

Preferably, the rotary nozzle shaft has good coaxiality to ensure reliable suction.

In this embodiment, the inner sides of the two rotary force bearing members 109 are provided with retaining rings 111, the retaining rings 111 are sleeved outside the rotary suction nozzle shaft 103, and the retaining rings 111 can be internally provided with a conductive structure, so that the retaining rings can be circumferentially fixed through the conductive structure.

The conductive structure is in contact with the rotary nozzle shaft 103 to perform electrostatic protection of the rotary nozzle shaft 103.

Alternatively, the conductive structure is arranged in the retainer ring 111, the conductive structure comprises a conductive body 113, a jack screw 114 and a first pressure spring 112, the jack screw 114 presses the first pressure spring 112 against the conductive body 113, and the conductive body 113 is in contact with the rotary suction nozzle shaft 103.

The conductive body 113 may be a conductive copper pillar or other metal material, such as silver-copper alloy. The conductive copper column is arranged in a circular hole of the retainer ring 111, a first pressure spring 112 is arranged at the tail of the conductive copper column, and a jackscrew 114 is used for extruding the first pressure spring 112, so that the conductive copper column is tightly attached to the rotary suction nozzle shaft 103, and a good conductive effect is kept.

Star-shaped sealing rings 110 are also arranged in the two retaining rings 111 for sealing. The two star-shaped sealing rings 110 are respectively installed on two grooves in the middle of the rotary suction nozzle shaft 103, so that the two star-shaped sealing rings are matched with the rotary suction nozzle shaft 103 and the suction nozzle installation seat 101 to realize the dynamic sealing (rotating) effect.

Between the two star-shaped seal rings 110, a passage for communicating with the first vacuum air passage on the rotary nozzle shaft 103 is provided in the nozzle mount 101, and a pipe joint 108 is attached to the nozzle mount 101, and the pipe joint 108 communicates with the passage on the nozzle mount 101. Thus, a sealed space is formed by the star seal 110.

Optionally, a flange is disposed on a portion of the rotary nozzle shaft 103 extending out of the nozzle mounting seat 101, a second vacuum air path is disposed on the flange, the second vacuum air path is communicated with the first vacuum air path, and an outlet of the second vacuum air path is located on a bottom surface of the flange. The inside cavity of rotatory suction nozzle axle 103 forms first vacuum gas circuit, still is provided with the second vacuum gas circuit on the flange and as the branch road, is applicable to the many suction nozzles of complicated components and parts and absorbs the condition, can use headless screw to seal when the branch road does not use.

In the present embodiment, the nozzle assembly 2 may include a first cushioning structure 20, a nozzle connecting plate 21, and a second cushioning structure, wherein the second cushioning structure may be provided or omitted as needed. The first buffer structure 20 and the second buffer structure may be identical in structure or different in structure.

In the present embodiment, the first buffer structure 20 and the second buffer structure are identical in structure, except that the first buffer structure 20 is directly mounted to the rotary nozzle shaft 103, such as by a screw connection. The second buffer structure is mounted to the rotary nozzle shaft 103 through the nozzle connection plate 21. Of course, more than 2 second buffer structures may be provided as required, or no second buffer structure is provided, which is not limited in this embodiment.

Optionally, the first buffer structure 20 includes a buffer shaft sleeve 201, a buffer shaft 202, a limiting member 204 and a suction nozzle mounting member 203, the buffer shaft sleeve 201 is connected to the rotary suction nozzle shaft 103 and rotates with the rotary suction nozzle shaft 103, and a guide groove is formed in the buffer shaft sleeve 201; the buffer shaft 202 extends into the buffer shaft sleeve 201, a second pressure spring 206 is arranged at one end of the buffer shaft 202 extending into the buffer shaft sleeve 201, and a mounting hole is formed in the buffer shaft 202; the limiting piece 204 passes through the guide groove and the mounting hole to limit the stroke of the buffer shaft 202 relative to the buffer shaft sleeve 201; the suction nozzle mount 203 is provided to the buffer shaft 202, and the suction nozzle mount 203 is for detachably coupling with the suction nozzle 208.

For example, the buffer sleeve 201 is connected to the rotary suction nozzle shaft 103, and a first sealing ring 22 (such as an O-ring or other sealing ring) is installed at the connection position to perform a sealing function.

The buffer shaft 202 extends into the buffer shaft sleeve 201, a groove is formed in the buffer shaft 202, a second sealing ring 207 (such as an O-shaped sealing ring) is installed at the groove and tightly attached to the buffer shaft sleeve 201 to achieve a sealing effect, and vacuum airflow is introduced into the buffer shaft 202.

The tail part (the upper part of the buffer shaft 202 shown in fig. 6) of the buffer shaft 202 is sleeved with a second compression spring 206, the second compression spring 206 is installed in the buffer shaft sleeve 201, the buffer shaft 202 can move up and down under the guidance of the buffer shaft sleeve 201, the head part (the lower part of the buffer shaft 202 shown in fig. 6) of the buffer shaft 202 is provided with a suction nozzle installation part 203, a suction nozzle 208 is installed on the suction nozzle installation part 203, and the suction nozzle 208 can be rapidly replaced under different working conditions.

Specifically, two symmetrical waist holes are formed in the middle of the buffer shaft sleeve 201, the limiting part 204 penetrates through one waist hole, the limiting part 204 can be a clamping pin, the clamping pin penetrates through the buffer shaft 202 and penetrates out of the other waist hole, a clamping spring 205 is installed at the tail end of the clamping pin to prevent the clamping pin from falling out, and the buffer shaft 202 moves up and down in the waist hole range under the limiting effect of the clamping pin.

Optionally, the suction nozzle connecting plate 21 is connected to the rotary suction nozzle shaft 103 and rotates with the rotary suction nozzle shaft 103, a vacuum transfer air passage is provided on the suction nozzle connecting plate 21, the vacuum transfer air passage is connected to the first vacuum air passage, and the second buffer structure is connected to the suction nozzle connecting plate 21 and is communicated with the first vacuum air passage through the vacuum transfer air passage. This allows the second cushioning structure to be used when multiple suction nozzles 208 are required.

The suction nozzle 208 may be a rubber suction nozzle to protect the material.

According to another aspect of the present application, there is provided a test sorting apparatus comprising the suction device described above. The suction device is compact in structure, an integrated suction nozzle mounting seat 101 is adopted, a power source, a rotary suction nozzle shaft 103 and a pipe joint 108 are mounted on the same part, the number of parts is reduced, the transfer of the parts is reduced, the whole structure is compact, good coaxiality of a stepping motor 102 and the rotary suction nozzle shaft 103 is ensured, the rotary suction nozzle shaft 103 is supported by double bearings, the suction nozzle 208 is ensured to have good rotary precision and stability, the problem of difficulty in mounting and debugging of multi-part transfer in the prior art is solved, a gas path adopts a structure that two second sealing rings 207 are in dynamic sealing, a vacuum gas path flows into the rotary suction nozzle shaft from the suction nozzle mounting seat and is communicated with a gas path of a suction nozzle tail end component (such as a suction nozzle mounting part 203 and a suction nozzle 208) and an external connecting gas pipe cannot rotate during operation, and friction between the traditional rotary suction nozzle component and the parts after the gas pipe swings is avoided, And the risk of falling off and the like is avoided, so that the installation and the debugging are convenient, and the precision and the stability are good.

In addition, the suction device has strong adaptability, is suitable for taking and placing different electronic components, can be quickly replaced when products are switched, and the suction nozzle component 2 can replace suction nozzles with tail ends of different sizes and materials according to the suction of different components; the first buffer structure and the second buffer structure adopt modular structures, and can be quickly replaced according to different product requirements; the suction nozzle component 2 adopts a structure that a middle first buffer structure is added with a patch panel, and can rapidly switch single and double suction nozzle structures according to different use conditions. And can reduce the processing degree of difficulty, promote the technology performance, adopt integral type suction nozzle mount pad, the power supply is installed on same part with rotatory suction nozzle axle, guarantees that motor and suction nozzle axle have good precision, and the multiple parts switching of prior art makes the machining error accumulate, and every part needs good precision and the cooperation of each other, and the processing degree of difficulty is big, and the high operation precision and the stability that can effectively promote automation equipment like this of technological requirement promote automation equipment's modularization degree.

The utility model discloses an absorbing device has following beneficial effect:

the rotary suction device has the advantages of good precision and stability, compact structure, convenience in installation and maintenance, strong adaptability, suitability for taking and placing different electronic elements, capability of effectively improving the running precision and stability of automation equipment and improvement on the modularization degree of the automation equipment.

Possesses the buffer function that prevents the material and press. When the suction device is used, the suction device moves to a position above a material, vacuum is started, a vacuum gas circuit is connected to the closed rotating assembly and is communicated to the suction nozzle assembly, and vacuum is generated at the tail end to suck the material; then the suction nozzle tail end component rotates to rotate the material by a set angle.

The relative position of the origin sensor and the origin baffle is utilized to realize the change of the rotating motion of the stepping motor and ensure the repeated positioning precision of the rotating motion mechanism.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. The utility model provides an absorbing device, its characterized in that, includes airtight rotating assembly and suction nozzle subassembly, airtight rotating assembly includes suction nozzle mount pad, power supply and rotatory suction nozzle axle, the power supply sets up on the suction nozzle mount pad, rotatory suction nozzle axle with the power supply is connected, and receives the drive of power supply and relative the suction nozzle mount pad rotates, the suction nozzle subassembly is connected rotatory suction nozzle is epaxial, rotatory suction nozzle is epaxial to be equipped with a vacuum gas circuit, with the end of suction nozzle subassembly forms the vacuum, the end of suction nozzle subassembly is used for being connected with suction nozzle detachably.

2. The suction device as claimed in claim 1, wherein the power source includes a stepping motor, and the hermetic rotating assembly further includes a positioning detection assembly connected to the stepping motor and detecting a rotation angle of the stepping motor.

3. The suction device as claimed in claim 2, wherein the positioning detection assembly comprises:

the origin sensor is arranged on the suction nozzle mounting seat;

the original point separation blade, be provided with the clearing hole that supplies the light to pass through on the original point separation blade, the original point separation blade sets up step motor is last, and at any time step motor rotates, works as the clearing hole of original point separation blade reaches during the original point sensor, make original point sensor light path switches on, and confirms step motor's rotation zero point.

4. The suction device as claimed in claim 1, wherein the closed rotary component further includes a plurality of rotary force-bearing members, and the plurality of rotary force-bearing members are sequentially sleeved outside the rotary suction nozzle shaft at intervals along the axial direction of the rotary suction nozzle shaft.

5. The suction device as claimed in claim 1, wherein a flange is provided on a portion of the rotary suction nozzle shaft extending out of the suction nozzle mounting seat, a second vacuum air passage is provided on the flange, the second vacuum air passage is communicated with the first vacuum air passage, and an outlet of the second vacuum air passage is located on a bottom surface of the flange.

6. The suction device as recited in claim 1, wherein the hermetic rotary assembly further comprises a conductive structure in contact with the rotary suction nozzle shaft for electrostatic protection of the rotary suction nozzle shaft.

7. The suction device as claimed in claim 6, wherein the hermetic rotary assembly further includes a retaining ring, the retaining ring is disposed outside the rotary suction nozzle shaft, the conductive structure is disposed in the retaining ring, the conductive structure includes a conductive body, a jack screw and a first compression spring, the jack screw presses the first compression spring against the conductive body, and the conductive body is in contact with the rotary suction nozzle shaft.

8. The suction device as recited in claim 1, wherein the nozzle assembly includes a first buffer structure, the first buffer structure comprising:

the buffer shaft sleeve is connected with the rotary suction nozzle shaft and rotates along with the rotary suction nozzle shaft, and a guide groove is formed in the buffer shaft sleeve;

the buffer shaft extends into the buffer shaft sleeve, a second pressure spring is arranged at one end of the buffer shaft extending into the buffer shaft sleeve, and a mounting hole is formed in the buffer shaft;

the limiting piece penetrates through the guide groove and the mounting hole to limit the stroke of the buffer shaft relative to the buffer shaft sleeve;

a nozzle mounting piece, the nozzle mounting piece set up in the buffering axle, the nozzle mounting piece be used for with the nozzle detachably connects.

9. The suction device as claimed in claim 1 or 8, wherein the suction nozzle assembly comprises a suction nozzle connecting plate and a second buffer structure, the suction nozzle connecting plate is connected with the rotary suction nozzle shaft and rotates along with the rotary suction nozzle shaft, a vacuum transfer air passage is arranged on the suction nozzle connecting plate and connected with the first vacuum air passage, and the second buffer structure is connected with the suction nozzle connecting plate and communicated with the first vacuum air passage through the vacuum transfer air passage.

10. A test sorting apparatus comprising the suction device of any one of claims 1 to 9.

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