CN113942798B

CN113942798B - Rotary positioning platform and detection system with same

Info

Publication number: CN113942798B
Application number: CN202111295027.4A
Authority: CN
Inventors: 曹晓新; 胡琼月; 胡大成
Original assignee: Strong Enterprise Innovation Technology Co ltd
Current assignee: Strong Enterprise Innovation Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-19
Anticipated expiration: 2041-11-03
Also published as: CN113942798A

Abstract

The invention discloses a rotary positioning platform, which comprises a fixed platform and a rotary platform rotatably arranged on the fixed platform; the rotary table comprises a table top part, the top of the table top part is provided with a plurality of mounting grooves, and the mounting grooves are internally provided with adsorption modules capable of vertically lifting; when the workpiece is pressed on the adsorption module, the adsorption module can move downwards and adsorb the workpiece under the action of the gravity of the workpiece; when the adsorption module is in a natural state, the adsorption module can move up to a preset height and lose adsorption capacity. Based on the arrangement, the workpiece can be stably adsorbed in a release state, so that the movement is avoided; simultaneously, at least part adsorbs the module and can produce effective absorption to different work pieces to can the adaptation work piece of different shapes, not unidimensional, different materials, promote rotational positioning platform's commonality by a wide margin.

Description

Rotary positioning platform and detection system with same

Technical Field

The invention relates to the technical field of workpiece positioning, in particular to a rotary positioning platform and a detection system with the same.

Background

With the rapid development of industrial equipment technology, tool parts have been widely used in various aspects of industrial facilities; the rotary table is one of essential basic components of robots and automation equipment, and plays an important role in the fields of conveying and positioning workpieces.

In the prior art, the rotational positioning platform mostly adopts a slot positioning mode, that is, a positioning slot matched with the shape of a workpiece is formed in the rotational positioning platform, and the workpiece is placed into the positioning slot and then rotates along with the rotational positioning platform. The above positioning method has at least the following disadvantages: on one hand, the sizes of the arranged positioning grooves are larger than those of workpieces, when the rotary positioning platform rotates, the workpieces can move relative to the positioning grooves under the action of inertia, so that accurate positioning is difficult, and errors can be generated in the processing or detecting process; on the other hand, one positioning groove can only match a workpiece with one size, and if the workpiece needs to be replaced by the matched positioning groove, the universality of the rotary positioning platform is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a rotary positioning platform and a detection system with the same, and solves the technical problems of easy movement and poor universality of workpieces in the conventional rotary positioning platform.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a rotational positioning platform comprising: the rotary table comprises a fixed table and a rotary table which is rotatably arranged on the fixed table; the rotary table comprises a table top part, the top of the table top part is provided with a plurality of mounting grooves, and the mounting grooves are internally provided with adsorption modules capable of vertically lifting; when the workpiece is pressed on the adsorption module, the adsorption module can move downwards and adsorb the workpiece under the action of the gravity of the workpiece; when the adsorption module is in a natural state, the adsorption module can move up to a preset height and lose adsorption capacity.

As a preferred scheme, the adsorption module comprises a cylinder body arranged in the mounting groove in a sliding manner, an elastic piece is arranged between the cylinder body and the mounting groove, and the elastic piece is used for springing the adsorption module to a preset height; a microswitch is arranged between the barrel and the mounting groove, and can be pressed when the barrel moves downwards, so that the microswitch sends an electric signal; an annular plate is constructed in the cylinder body, and an extension pipe is arranged on the annular plate; the outer side of the upper part of the extension tube is combined in an inner hole of the annular plate, the gas at the lower part of the extension tube is connected with the air suction manifold in a conducting way, and an electronic check valve is arranged in the air suction manifold; the electronic check valve is used for regulating and controlling the conductivity of gas in the suction manifold; the other end of the air suction manifold is connected with the air pump in an air conduction mode, so that the suction force is transmitted to the upper end of the telescopic pipe, and further the workpiece is adsorbed.

As a preferred scheme, the inner hole wall of the annular plate is in a flaring shape from bottom to top, and the upper part of the extension tube is provided with an air suction port which is in airtight combination with the inner hole wall of the annular plate so as to enhance the combination strength of the annular plate and the extension tube; the periphery of the extension tube is provided with a limiting part which is clamped at the bottom side of the annular plate so as to prevent the extension tube from pushing the air suction port upwards in the compression process.

Preferably, the turntable further comprises a rotating part connected to the table part, and the air pump is arranged on the rotating part; a stepping motor is fixed on the fixed platform, and the rotating platform rotates at intervals under the action of the stepping motor; a rotating accommodating groove is formed at the top of the fixed table, and the lower part of the rotating part is arranged in the rotating accommodating groove; a radial bearing is arranged between the side part of the rotating part and the rotating accommodating groove, and a thrust bearing is arranged between the bottom of the rotating part and the rotating accommodating groove.

Preferably, the plurality of suction modules are configured on the rotary table as a plurality of rings with different radii, and each ring is composed of the plurality of suction modules at uniform intervals.

The other technical scheme adopted by the invention for solving the technical problem is as follows:

a detection system comprises a conveying unit, a feeding mechanical unit, a detection unit, a discharging mechanical unit and the rotary positioning platform; the conveying unit comprises a first belt, a second belt and a third belt, wherein the first belt is driven in a first direction, and the second belt and the third belt are driven in a second direction; the first direction and the second direction are opposite directions, the length direction of the feeding mechanical unit is the same as that of the blanking mechanical unit, and the first direction is basically vertical to that of the blanking mechanical unit.

Preferably, the feeding mechanical unit comprises a translation guide frame; the rack and the sliding rail are fixed on the translation guide frame; a guide seat arranged on the slide rail in a sliding way; the translation motor is fixed on the guide seat, and a translation gear meshed with the rack is arranged on the translation motor; and a linear electric cylinder fixed on the guide seat, wherein one end of the telescopic shaft is provided with a material taking and placing component.

Preferably, the conveying unit further comprises a first frame and a second frame which are oppositely arranged; and a conveying motor fixed on the first frame; the first belt, the second belt and the third belt are arranged in opposite spaces of the first rack and the second rack and are driven by the conveying motor to operate.

Preferably, the conveying unit further comprises a reverse transmission member, the reverse transmission member comprises a first shaft connected with the conveying motor, one end of the first shaft is rotatably arranged on the first frame, the other end of the first shaft is provided with a gear barrel, and the gear barrel is provided with an inner gear part; a second shaft, one end of which is rotatably arranged on the second frame and the other end of which is provided with an external tooth part; and a support ring fixedly arranged, one side of which is provided with a plurality of intermediate gears; wherein the intermediate gear is meshed with the inner tooth part and the outer tooth part.

Preferably, the conveying unit further comprises a third roller and a second roller fixed on the first shaft; a first roller fixed to the second shaft; and a third opposing roller, a second opposing roller, and a first opposing roller rotatably disposed between the first shelf and the second shelf; wherein the first belt is connected to the third roller and the third opposing roller, the second belt is connected to the second roller and the second opposing roller, and the third belt is connected to the first roller and the first opposing roller; the third opposite roller, the second opposite roller and the first opposite roller are synchronously linked by adopting a reverse transmission piece.

Compared with the prior art, the invention has the beneficial effects that: the rotary positioning platform provided by the invention is provided with a plurality of mounting grooves on the top of the table top part, and adsorption modules capable of vertically lifting are arranged in the mounting grooves; when the work piece is pressed and is put at the adsorption module, the adsorption module can move down, adsorb the work piece under the action of gravity of work piece, and when the adsorption module was natural state, it can move up to predetermineeing the height, lose the adsorption efficiency. Based on the arrangement, the workpiece can be stably adsorbed in a release state, so that the movement is avoided; simultaneously, at least part adsorbs the module and can produce effective absorption to different work pieces to can the adaptation work piece of different shapes, not unidimensional, different materials, promote rotational positioning platform's commonality by a wide margin.

Drawings

FIG. 1 is a schematic diagram of an exemplary embodiment of a detection system;

FIG. 2 is a cross-sectional view of an embodiment of a rotational positioning stage;

FIG. 3 is a partial cross-sectional view of the rotational positioning stage of FIG. 2;

FIG. 4 is a schematic structural diagram of a loading mechanism unit according to an embodiment;

FIG. 5 is a schematic diagram of a conveying unit according to an embodiment;

FIG. 6 is a schematic view of a portion of the delivery unit of FIG. 5;

FIG. 7 is a disassembled view of the reverse driving member in one embodiment;

FIG. 8 is a cross-sectional view of the reverse drive member of FIG. 7.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

As shown in fig. 2 and 3, the present invention provides a rotary positioning table 3, comprising:

a fixed table 31 and a rotary table 32 rotatably provided on the fixed table 31; the rotating table 32 comprises a table top part, a plurality of mounting grooves 320 are formed in the top of the table top part, and adsorption modules 34 capable of vertically lifting are arranged in the mounting grooves 320; when a workpiece is pressed on the adsorption module 34, the adsorption module 34 can move downwards under the action of the gravity of the workpiece, so that the workpiece is adsorbed; when the adsorption module 34 is in a natural state, it can move up to a predetermined height, thereby losing adsorption capacity. The natural state is a state in which no workpiece is placed on the adsorption module 34.

As an embodiment of the present invention, the adsorption module 34 includes a cylinder 341 slidably disposed in the mounting groove 320, an elastic member 342 is disposed between the cylinder 341 and the mounting groove 320, and the elastic member 342 is used for springing up the adsorption module 34 to a predetermined height;

a micro switch 344 is further disposed between the cylinder 341 and the mounting groove 320, and when the cylinder 341 moves downward, the micro switch 344 can be pressed, so that the micro switch 344 sends an electric signal.

Further, an annular plate 3410 is configured in the cylinder 341, and a telescopic tube 343 is mounted on the annular plate 3410; the upper outer side of the telescopic tube 343 is combined in the inner hole of the ring plate 3410, and the lower part thereof is connected to the suction manifold 331 in a gas conducting manner, and the suction manifold 331 is provided with an electronic check valve 332; the electronic check valve 332 is used for regulating the conductivity of the gas in the suction manifold 331.

The other end of the suction manifold 331 is connected to the air pump 33 in an air-conducting manner, and is used for transmitting suction to the upper end of the telescopic tube 343, so as to adsorb the workpiece.

In a specific application scenario, a plurality of adsorption modules 34 are arranged at the lower part of the workpiece, and after the workpiece is released, the workpiece is pressed down on part of the adsorption modules 34; the pressed part of the adsorption module 34 moves down and touches the corresponding micro switch 344; because the electronic stop valves 332 correspond to the micro switches 344 one by one, the electronic stop valve 332 corresponding to the pressed micro switch 344 controls the suction manifold 331 to be in a conducting state, and the air pump 33 transmits the suction force to the extension tube 343 to adsorb the workpiece. The part of the adsorption module 34 that is not pressed down by the workpiece does not touch the corresponding micro switch 344, the electronic stop valve 332 corresponding to the micro switch 344 that is not pressed controls the suction manifold 331 to be in a closed state, and the air pump 33 does not transmit the suction force to the corresponding telescopic tube 343. In view of this, a plurality of adsorption modules 34 can adapt to the work piece of different shapes, different sizes, different materials, has promoted the commonality and the stable location nature of rotational positioning platform greatly.

In an embodiment of the present invention, the inner wall of the annular plate 3410 is flared from bottom to top, and the upper portion of the telescopic tube 343 has a suction port 3431 hermetically connected to the inner wall of the annular plate 3410, so that the joint strength between the annular plate 3410 and the telescopic tube 343 is enhanced, and the detachment of the annular plate 3410 and the telescopic tube 343 is prevented.

The outer circumference of the telescopic tube 343 is configured with a stopper 3432, and the stopper 3432 is clamped at the bottom side of the ring plate 3410 to prevent the telescopic tube 343 from pushing the suction port 3431 upward during compression and affecting the air tightness.

The telescopic tube 343 in this application may be a telescopic tube body known by those skilled in the art, such as a corrugated tube, a rubber tube, etc., and is not limited in this application.

As an embodiment of the present invention, a plurality of the air intake manifolds 331 are connected to the air pump 33 in an air-conducting manner through the air intake manifold 330, thereby realizing that the air flows in the plurality of air intake manifolds 331, even all of the air intake manifolds 331 are supplied by one air pump.

The rotary table 32 further includes a rotary portion 321 connected to the table portion, and the air pump 33 is disposed on the rotary portion 321.

In an embodiment of the present invention, a stepping motor 30 is fixed to the fixed table 31, and the rotary table 32 is rotated at intervals by the stepping motor 30.

In a specific application scenario, the rotating portion 321 and the output shaft 301 of the stepping motor 30 are in gear transmission, chain transmission or belt transmission.

In order to achieve stable and smooth relative rotation between the fixed table 31 and the rotating table 32, in an embodiment, a ring table 311 is disposed on a top portion of the fixed table 31, an inner space of the ring table 311 is configured as a rotation accommodating groove 310, and a lower portion of the rotating portion 321 is disposed in the rotation accommodating groove 310.

Further, a radial bearing 313 is disposed between the side of the rotating part 321 and the rotating accommodating groove 310, and a thrust bearing 312 is disposed between the bottom of the rotating part 321 and the rotating accommodating groove 310.

Referring to fig. 1, as an embodiment of the present invention, a plurality of suction modules are configured on the rotary table 32 as a plurality of rings with different radii, and each ring is composed of a plurality of suction modules at regular intervals; therefore, the workpiece can be better adapted, and the universality is enhanced.

Of course, a plurality of adsorption module groups evenly spaced may be further configured on the rotary table 32, each adsorption module group is composed of a plurality of adsorption modules, and the whole adsorption module group may be configured into a circle, a rectangle, a trapezoid, a triangle or other shapes to be adapted to the workpiece. It should be noted that, because the adsorption module group is formed by combining a plurality of adsorption modules, it cannot be represented in a regular shape, and the above-mentioned circular shape, rectangular shape, etc. can be understood as a shape that the visual effect is substantially represented.

As shown in fig. 1, the present invention further provides a detection system, which includes the rotary positioning platform 3 in any of the above embodiments, and further includes a conveying unit 1, a feeding mechanical unit 2, a detection unit 4, and a discharging mechanical unit 5;

wherein the conveying unit 1 comprises a first belt 11 driven in a first direction and a second belt 12 and a third belt 13 driven in a second direction;

the first direction and the second direction are opposite directions; the length direction of the feeding mechanical unit 2 is the same as the length direction A of the blanking mechanical unit 5; the first direction is substantially perpendicular to the longitudinal direction a of the blanking mechanical unit 5. Therefore, the occupied space of the detection system can be optimized, and the material receiving and discharging operation is facilitated.

In a specific application scenario, the conveying unit 1 continuously operates, and manual or mechanical hands perform material receiving and discharging operations on workpieces; placing a workpiece to be detected on the first belt 11 by a worker or a manipulator, and moving the workpiece to be detected along a first direction; when the workpiece to be detected moves to the picking range of the feeding mechanical unit 2, the feeding mechanical unit 2 transfers the workpiece to be detected from the first belt 11 to the rotary positioning platform 3; when the workpiece to be detected is pressed on the partial adsorption module 34, the partial adsorption module 34 can adsorb and position the workpiece to be detected; the stepping motor 30 drives the rotating platform 32 to rotate, and when the workpiece to be detected moves to a detectable range of the detecting unit 4, the detecting unit 4 collects relevant information (whether to open a hole, whether the flatness meets the requirement, whether the size meets the requirement, and the like) of the workpiece to be detected; the detected workpiece continues to move along with the rotating platform 32, and when the detected workpiece moves to the picking range of the blanking mechanical unit 5, the blanking mechanical unit 5 lifts the detected workpiece from the rotating platform 32; the pressed part of the adsorption module 34 moves up to a preset height and loses adsorption capacity; if the result of the detection of the workpiece is acceptable, the blanking mechanical unit 5 moves the detected workpiece onto one of the second belt 12 and the third belt 13, and if the result of the detection of the workpiece is unacceptable, the blanking mechanical unit 5 moves the detected workpiece onto the other of the second belt 12 and the third belt 13. And finally, conveying the qualified workpieces and the unqualified workpieces to the material discharging end of the workpiece to be detected, so that the manual or mechanical arm can perform material receiving and discharging operation on one station.

Referring to fig. 1 and 4, as an embodiment of the present invention, the feeding mechanism unit 2 and the discharging mechanism unit 5 may have the same structure.

Specifically, the feeding mechanism unit 2 includes a translation guide 21; a rack 211 and a slide rail 212 fixed to the translation guide 21 along the longitudinal direction a; a guide 22 slidably disposed on the slide rail 212; a translation motor 23 fixed on the guide seat 22, wherein a translation gear (not shown) engaged with the rack 211 is arranged on the translation motor 23; and a material taking and placing component is arranged at one end of a telescopic shaft 241 of the linear electric cylinder 24 fixed on the guide seat 22.

The material taking and placing component can be a mechanical arm, a sucker component or a clamping jaw and the like; in one embodiment, the material taking and placing assembly includes a suction cup holder 251, and a plurality of material taking and placing suction cups 252 are disposed on the suction cup holder 251.

Referring to fig. 5 and 6, as an embodiment of the present invention, the conveying unit 1 further includes a first frame 141 and a second frame 142 which are oppositely disposed; and

a conveying motor 10 fixed to the first frame 141;

wherein the first belt 11, the second belt 12 and the third belt 13 are disposed in the opposing spaces of the first rack 141 and the second rack 142 and are driven by a conveying motor 10.

With reference to fig. 7 and 8, further, the delivery unit 1 also comprises a counter-drive (not shown) comprising

A first shaft 161 connected to the conveyor motor 10 by a direct connection, a gear transmission, a chain transmission, a belt transmission, or the like, wherein one end 1611 of the first shaft 161 is rotatably disposed on the first frame 141, and the other end is configured with a gear cylinder 171, and the gear cylinder 171 has an internal gear 1711;

a second shaft 162 having one end 1621 rotatably disposed on the second frame 142 and the other end configured with an external tooth portion 174; and

a support ring 172 fixedly installed with a plurality of intermediate gears 173 arranged on one side thereof;

wherein the intermediate gear 173 is meshed with the internal teeth 1711 and the external teeth 174; when the internal teeth 1711 rotate in one rotational direction, the plurality of intermediate gears 173 rotate in the same direction, and the external teeth 174 rotate in the opposite direction.

As an embodiment of the present invention, a plurality of rotating shafts 1731 are uniformly arranged on one side of the support ring 172 along the circumferential direction thereof, and the intermediate gear 173 is correspondingly rotatably mounted on the rotating shafts 1731; a support plate 1721 is configured on the support ring 172, a support frame 143 is fixed between the first frame 141 and the second frame 142, and the support plate 1721 is fixed on the support frame 143.

As an embodiment of the present invention, the conveying unit 1 further includes

A first roller 151 and a second roller 152 fixed to the first shaft 161;

a third roller 153 fixed to the second shaft 162; and

a first pair of rollers 151 ', a second pair of rollers 152 ', and a third pair of rollers 153 ' rotatably disposed in the opposing spaces of the first and

second racks

141 and 142;

wherein the first belt 11 is connected to the third roller 153 and the third counter roller 153 ', the second belt 12 is connected to the second roller 152 and the second counter roller 152 ', and the third belt 13 is connected to the first roller 151 and the first counter roller 151 '.

As an embodiment of the present invention, the first opposing roller 151 ', the second opposing roller 152 ', and the third opposing roller 153 ' in the present invention may rotate freely in a linked manner, the first opposing roller 151 ' and the second opposing roller 152 ' may be fixed on a third shaft together, or a reverse transmission member may be used to synchronously link the first opposing roller, the second opposing roller, and the third opposing roller;

specifically, the present embodiment defines that the first opposing roller 151 ' and the second opposing roller 152 ' are fixed on a third shaft, the third opposing roller 153 ' is fixed on a fourth shaft, and the third shaft and the fourth shaft perform reverse transmission through the internal tooth portion, and the external tooth portion. Based on the structure, the first belt 11, the second belt 12 and the third belt 13 can be linked more stably, and the transmission inefficiency caused by the relative friction between the rollers and the belts is avoided.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A rotational positioning platform, comprising:

a fixed table (31) and a rotating table (32) rotatably provided on the fixed table (31);

the rotary table (32) comprises a table top part, the top of the table top part is provided with a plurality of mounting grooves (320), and adsorption modules (34) capable of vertically lifting are arranged in the mounting grooves (320);

when the workpiece is pressed on the adsorption module (34), the adsorption module (34) can move downwards and adsorb the workpiece under the action of the gravity of the workpiece; when the adsorption module (34) is in a natural state, the adsorption module can move up to a preset height and lose adsorption capacity;

the adsorption module (34) comprises a cylinder body (341) which is slidably arranged in the mounting groove (320), an elastic piece (342) is arranged between the cylinder body (341) and the mounting groove (320), and the elastic piece (342) is used for upwards bouncing the adsorption module (34) to a preset height;

a microswitch (344) is arranged between the cylinder (341) and the mounting groove (320), and when the cylinder (341) moves downwards, the microswitch (344) can be pressed, so that the microswitch (344) sends an electric signal;

an annular plate (3410) is constructed in the cylinder body (341), and a telescopic pipe (343) is mounted on the annular plate (3410); the upper outer side of the telescopic pipe (343) is combined in the inner hole of the ring plate (3410), the lower part of the telescopic pipe is connected with a suction manifold (331) in a gas conduction mode, and an electronic check valve (332) is arranged in the suction manifold (331); the electronic check valve (332) is used for regulating and controlling the conductivity of gas in the air suction manifold (331);

the other end of the suction manifold (331) is connected to an air pump (33) in an air-conducting manner, so that the suction force is conducted to the upper end of the telescopic pipe (343) to further adsorb the workpiece.

2. The rotational positioning platform of claim 1,

the inner hole wall of the ring plate (3410) is flared from bottom to top, and the upper part of the telescopic pipe (343) is provided with a gas suction port (3431) which is hermetically combined with the inner hole wall of the ring plate (3410) so as to strengthen the combination strength of the ring plate (3410) and the telescopic pipe (343);

a limiting part (3432) is formed on the outer periphery of the telescopic pipe (343), and the limiting part (3432) is clamped at the bottom side of the ring plate (3410) to prevent the telescopic pipe (343) from pushing the air suction port (3431) upwards in the compression process.

3. The rotational positioning platform of claim 1,

the rotating table (32) further comprises a rotating part (321) connected to the table surface part, and the air pump (33) is arranged on the rotating part (321);

a stepping motor (30) is fixed on the fixed table (31), and the rotating table (32) rotates at intervals under the action of the stepping motor (30);

a rotation accommodating groove (310) is formed at the top of the fixed table (31), and the lower part of the rotating part (321) is arranged in the rotation accommodating groove (310);

a radial bearing (313) is arranged between the side of the rotating part (321) and the rotating accommodating groove (310), and a thrust bearing (312) is arranged between the bottom of the rotating part (321) and the rotating accommodating groove (310).

4. The rotational positioning platform of claim 1,

the plurality of adsorption modules (34) are configured on the rotary table (32) as a plurality of rings with different radii, each ring being composed of a plurality of adsorption modules (34) which are uniformly spaced.

5. A detection system is characterized by comprising

-a conveying unit (1), a loading mechanical unit (2), a detection unit (4), a blanking mechanical unit (5) and a rotary positioning platform (3) as claimed in one of claims 1 to 4;

wherein the conveying unit (1) comprises a first belt (11) driven in a first direction and a second belt (12) and a third belt (13) driven in a second direction;

the first direction and the second direction are opposite directions, the length direction of the feeding mechanical unit (2) is the same as that of the blanking mechanical unit (5), and the first direction is basically vertical to that of the blanking mechanical unit (5).

6. The detection system of claim 5,

the feeding mechanical unit (2) comprises a translation guide frame (21);

a rack (211) and a slide rail (212) fixed on the translation guide frame (21);

a guide seat (22) slidably disposed on the slide rail (212);

the translation motor (23) is fixed on the guide seat (22), and a translation gear meshed with the rack (211) is arranged on the translation motor (23); and

and a linear electric cylinder (24) fixed on the guide seat (22), wherein one end of a telescopic shaft (241) is provided with a material taking and placing component.

7. The detection system of claim 5,

the conveying unit (1) further comprises a first rack (141) and a second rack (142) which are oppositely arranged; and a conveyor motor (10) fixed to said first frame (141);

wherein the first belt (11), the second belt (12) and the third belt (13) are arranged in opposite spaces of the first rack (141) and the second rack (142) and are driven by the conveying motor (10) to operate.

8. The detection system of claim 7,

the conveying unit (1) further comprises a reverse transmission member, which comprises

A first shaft (161) connected to the conveyor motor (10), wherein one end (1611) of the first shaft (161) is rotatably disposed on the first frame (141), and the other end is provided with a gear cylinder (171), and the gear cylinder (171) has an internal gear portion (1711);

a second shaft (162) having one end (1621) rotatably disposed on the second frame (142) and the other end having an external tooth portion (174); and

a support ring (172) fixedly provided, one side of which is provided with a plurality of intermediate gears (173);

wherein the intermediate gear (173) is meshed with the internal tooth portion (1711) and the external tooth portion (174).

9. The detection system of claim 8,

the conveying unit (1) further comprises

A first roller (151) and a second roller (152) fixed to the first shaft (161);

a third roller (153) fixed to the second shaft (162); and

a third opposing roller, a second opposing roller, and a first opposing roller rotatably disposed between the first frame (141) and the second frame (142);

wherein the first belt (11) is connected to the third roller (153) and the third counter roller, the second belt (12) is connected to the second roller (152) and the second counter roller, and the third belt (13) is connected to the first roller (151) and the first counter roller;

the third opposite roller, the second opposite roller and the first opposite roller are synchronously linked by adopting the reverse transmission piece.