CN211054379U

CN211054379U - Plastic strip air cooling system

Info

Publication number: CN211054379U
Application number: CN201922046916.1U
Authority: CN
Inventors: 龙新; 朱小林
Original assignee: Dongguan Defa Plastic Technology Co ltd
Current assignee: Dongguan Defa Plastic Technology Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-07-21
Anticipated expiration: 2029-11-21

Abstract

The utility model belongs to the technical field of the technique of plastics production facility and specifically relates to a plastics strip air cooling system is related to, its technical scheme main points are: including the carriage and locate the conveying mechanism on the carriage, conveying mechanism includes the final drive wheel, the accessory drive wheel, connect the conveyer belt between final drive wheel and accessory drive wheel and connect and be used for driving final drive wheel pivoted drive motor on the final drive wheel, be equipped with the mounting bracket on the carriage, the mounting bracket includes a plurality of pillars and connects the crossbeam between the pillar, be equipped with the fan between the adjacent crossbeam, the both sides of carriage all are equipped with the bearing block, the bearing block rotates and bears the lead screw, be provided with the movable block with lead screw threaded connection on the crossbeam, and the lead screw runs through the upper and lower surface of movable block, fixedly connected with slides the guide block of being connected with the pillar on the carriage, be equipped with the actuating mechanism that the lead screw is just reversing on the carriage, this kind of plastic strip air cooling system has adjustable fan height, thereby change.

Description

Plastic strip air cooling system

Technical Field

The utility model belongs to the technical field of the technique of plastics production facility and specifically relates to a plastics strip air cooling system is related to.

Background

Plastic parts are widely used in daily life, and in the molding of plastic parts, plastic particles are generally heated and melted into plastic fluid, and the plastic fluid flows into a mold cavity to obtain a molded plastic part. In the production process of plastic granules, an extruder is generally used to melt a plastic raw material into a fluid, the plastic fluid is pushed to an extrusion port of the extruder by an extrusion screw of the extruder to extrude a soft plastic strip, then the plastic strip is cooled to a relatively stable solidified state by wind power, and finally the plastic strip is cut by a cutting machine to obtain plastic granules, wherein an air cooling system is generally used to cool the freshly extruded plastic strip in the cooling process of the plastic strip.

At present, for example, chinese patent document with publication number CN204149358U discloses a bar-shaped plastic granulator, which comprises a conveying mechanism, the conveying mechanism comprises a frame, a transmission motor, a driving wheel, a driven wheel, a transmission network chain and a plurality of fans, the driving wheel and both ends of the driven wheel are movably connected to the frame, the transmission network chain surrounds the driving wheel, the driven wheel, the driving wheel is driven by the transmission motor through a transmission belt, the network chain surrounds the driving wheel and the transmission wheel to convey plastic bars to the horizontal direction, in addition, a supporting frame is fixedly connected to the frame, the fans are installed on the supporting frame, and the fans can rotate relative to the supporting frame, and the fans blow air to cool the plastic bars.

Because the different of plastics material thereby leads to its characteristic different, in production process, the required amount of wind is inequality at the heat dissipation in-process between different plastics materials, and the high position of fan is fixed unchangeable, and the unable fine regulation of the amount of wind between fan and the plastic strip, so need improve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plastic strip air-cooling system, this kind of plastic strip air-cooling system have adjustable fan height to change the function of the plastic strip cooling amount of wind.

In order to achieve the above object, the utility model provides a following technical scheme: a plastic strip air cooling system comprises a conveying frame and a conveying mechanism arranged on the conveying frame, wherein the conveying mechanism comprises a main driving wheel, an auxiliary driving wheel, a conveying belt connected between the main driving wheel and the auxiliary driving wheel and a transmission motor connected to the main driving wheel and used for driving the main driving wheel to rotate, a mounting frame is arranged on the conveying frame and comprises a plurality of supporting columns arranged in the vertical direction and cross beams connected between the supporting columns, a fan is arranged between every two adjacent cross beams and positioned right above the conveying belt, bearing blocks are arranged on two sides of the conveying frame and rotatably bear lead screws in the vertical direction, moving blocks in threaded connection with the lead screws are arranged on the cross beams, the lead screws penetrate through the upper surface and the lower surface of the moving blocks, and guide blocks in sliding connection with the supporting columns are fixedly connected to the conveying frame, and the conveying frame is provided with a driving mechanism for driving the screw rod to rotate forwards and reversely.

Through adopting above-mentioned technical scheme, two lead screw forward or antiport of drive arrangement drive, make the movable block move toward lead screw length direction, the movable block moves along vertical direction promptly, thereby make and drive the mounting bracket and go up and down along vertical direction, at this moment, the fan of installing on the movable block is also close to or keeps away from relative conveyer belt, the altitude mixture control of fan has been realized, thereby the amount of wind that the plastic strip received has been changed, the pillar slides and connects in the guide block in addition, the guide block has played the guide effect to the mounting bracket at the in-process that slides, it is more stable at the removal in-process to make the mounting bracket.

The utility model discloses further set up to: the transmission mechanism comprises a transmission shaft which is connected to the conveying frame in a rotating mode along the horizontal direction and two pairs of bevel gears which are arranged between the screw rods and the transmission shaft and are meshed with each other, and the two pairs of bevel gears are located at two ends of the transmission shaft respectively.

Through adopting above-mentioned technical scheme, actuating mechanism drive transmission shaft rotates, and when the transmission shaft rotated, a pair of helical gear of intermeshing turned into the rotation of lead screw with the rotation of transmission shaft, and the lead screw orders about and drives the mounting bracket and move along vertical direction.

The utility model discloses further set up to: the driving mechanism comprises a servo motor fixedly connected to the bottom of the conveying frame and a first gear and a second gear which are fixedly sleeved on the output shaft of the servo motor and the transmission shaft respectively, and the first gear and the second gear are meshed with each other.

Through adopting above-mentioned technical scheme, servo motor passes through intermeshing's first gear and second gear with power transmission to the transmission shaft on, in addition, servo motor has the effect that can just reverse, and servo motor still possesses advantages such as steerable slew velocity and position accuracy control accuracy simultaneously, has satisfied the operating mode needs.

The utility model discloses further set up to: the top end of the screw rod is provided with a limiting block used for limiting the mounting frame to be separated from the screw rod.

Through adopting above-mentioned technical scheme, the stopper plays limiting displacement to the mounting bracket, makes it can not break away from the lead screw.

The utility model discloses further set up to: the strut is provided with first spacing boss and second spacing boss along its length direction interval, the guide block is located first spacing boss and between the second spacing boss.

Through adopting above-mentioned technical scheme, when the pillar slide in the guide block to certain distance with the spacing boss butt of first spacing boss or second, first spacing boss and the spacing boss of second have played the sliding distance of restriction pillar in the guide block, prevent to lead to the fact fan striking conveyer belt excessively because of the mounting bracket goes up and down.

The utility model discloses further set up to: the side wall of the pillar is provided with scale marks along the vertical direction.

Through adopting above-mentioned technical scheme, the slide distance of pillar can be reflected directly perceivedly to the scale mark, has also indirectly reflected the high lift distance of mounting bracket in addition, is convenient for the staff to adjust the height of fan apart from the conveyer belt.

The utility model discloses further set up to: the carriage includes feed end and discharge end in proper order, the discharge end fixedly connected with extension board of carriage, the extension board is the level setting.

Through adopting above-mentioned technical scheme, because plastic granules's production process is streamlined production, is provided with the extension board at the carriage discharge end, and the extension board bears the plastic strip and removes to next work step, simultaneously, prevents that the plastic strip from drooping when the discharge end ejection of compact from causing buckling of plastic strip on the ground to the quality of plastic strip in the transportation has been guaranteed.

The utility model discloses further set up to: the outer surface of the conveying belt is sequentially provided with a plurality of anti-slip strips along the conveying direction.

Through adopting above-mentioned technical scheme, the antislip strip on conveyer belt surface can increase the friction between plastic strip and the conveyer belt, reduces the skidding between plastic strip and the conveyer belt, and the plastic strip is more stable in transmission process.

To sum up, the utility model discloses a beneficial technological effect does:

1. the driving device drives the two lead screws to rotate forwards or reversely, so that the moving block moves in the vertical direction, the mounting frame is driven to move in the vertical direction, and at the moment, the fan arranged on the moving block is close to or far away from the conveying belt, so that the height adjustment of the fan is realized, and the air quantity borne by the plastic strips is changed;

2. the scale marks can visually reflect the sliding distance of the support, and indirectly reflect the height lifting distance of the mounting rack, so that the height of the fan from the conveying belt can be conveniently adjusted by workers;

3. the antislip strip can increase the friction between plastic strip and the conveyer belt, reduces the skidding between plastic strip and the conveyer belt, and the plastic strip is more stable in transmission process.

Drawings

Fig. 1 is a schematic structural diagram in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view angle in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a mounting seat, a mounting block and a fan in the embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of a mount coupled to a fan in an embodiment of the invention;

FIG. 5 is an enlarged view at A in FIG. 2;

fig. 6 is an enlarged view at B in fig. 1.

In the figure, 1, a conveying frame; 1001. a feeding end; 1002. a discharge end; 2. a main transmission wheel; 3. an auxiliary transmission wheel; 4. a conveyor belt; 41. anti-slip strips; 5. a drive motor; 6. a mounting frame; 61. a pillar; 611. a first limit boss; 612. a second limit boss; 613. scale lines; 62. a cross beam; 621. a moving block; 7. a mounting seat; 71. mounting grooves; 72. inserting grooves; 73. a through hole; 8. mounting blocks; 81. a guide rail; 811. a slot; 82. installing a shaft; 821. a fan; 822. a nut; 9. a limiting component; 91. a first spring; 92. an insertion block; 921. a sliding block; 10. a pressing block; 101. a pressing plate; 102. a second spring; 11. a guide surface; 12. a bearing block; 13. a screw rod; 131. a bearing table; 132. a limiting block; 14. a guide block; 15. a transmission mechanism; 151. a drive shaft; 152. a bevel gear; 16. a support block; 17. a drive mechanism; 171. a servo motor; 172. a first gear; 173. a second gear; 18. an extension plate; 181. a side dam; 19. and a butt joint block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a plastic strip air cooling system, including carriage 1 and set up the conveying mechanism on carriage 1, carriage 1 includes feed end 1001 and discharge end 1002 in proper order. Specifically, conveying mechanism includes final drive wheel 2, auxiliary drive wheel 3, connect in the conveyer belt 4 between final drive wheel 2 and auxiliary drive wheel 3 and connect and be used for driving final drive wheel 2 pivoted drive motor 5 on final drive wheel 2, carriage 1 is used for bearing each part and mechanism, conveying mechanism is used for realizing the transportation pay-off of plastic strip, places the plastic strip in conveyer belt 4, drives the plastic strip motion through the motion of conveyer belt 4. The shapes and the assembling relations of the conveying frame 1 and the conveying mechanism components are the prior art and are not described herein again.

In addition, the conveying frame 1 is provided with a mounting frame 6, and the mounting frame 6 comprises a plurality of support columns 61 arranged along the vertical direction and a cross beam 62 connected between the support columns 61. Preferably, in the present embodiment, the pillars 61 and the beams 62 are cylindrical, the number of the pillars 61 is eight, and the number of the beams 62 is four. Wherein, the length of each pillar 61 is equal, and the four beams 62 are arranged in a rectangular frame shape; the pillars 61 are arranged in two rows, the number of each row of pillars 61 is four, the top ends of one row of pillars 61 are welded on one cross beam 62 at intervals along the length direction of the cross beam, the top ends of the other row of pillars 61 are welded on the other row of pillars 62 at intervals along the length direction of the other cross beam 62, and a stable frame body is formed between the cross beams 62 and the pillars 61.

Referring to fig. 1 and 2, a fan 821 is disposed between two adjacent long beams 62, and the fan 821 is located right above the conveyor belt 4, and the fan 821 is used for cooling the plastic strips. Specifically, a plurality of mounting seats 7 are sequentially arranged at intervals on the top of the mounting frame 6 along the conveying direction of the conveyor belt 4, the number of the mounting seats 7 is preferably three in this embodiment, the mounting seats 7 are rectangular plate-shaped, and both side ends of the mounting seats 7 are respectively welded on the two cross beams 62.

Referring to fig. 2 and 3, the mounting seat 7 is located right above the conveyor belt 4, a mounting groove 71 is horizontally provided on a side wall of the mounting seat 7, and the mounting groove 71 has a T-shaped cross section. The mounting seat 7 is connected with a mounting block 8 in a sliding manner, and the mounting block 8 is rectangular and the upper surface of the mounting block 8 is abutted to the lower surface of the mounting seat 7 in a sliding manner. Installation piece 8 has along horizontal direction integrated into one piece with mounting groove 71 grafting complex guide rail 81, and the cross-section of guide rail 81 is the T type, and the surface of guide rail 81 and the inner wall of mounting groove 71 butt that slides, and when the guide rail 81 of T type was pegged graft in the mounting groove 71 of T type, difficult emergence was separated from between mount pad 7 and the installation piece 8, and mount pad 7 is provided with the spacing subassembly 9 that is used for restricting guide rail 81 to break away from mounting groove 71.

Referring to fig. 3 and 4, the mounting seat 7 is provided with an insertion groove 72 along the horizontal direction, the insertion groove 72 is communicated with the mounting groove 71, the limiting component 9 includes an insertion block 92 and a first spring 91, the insertion block 92 is slidably connected in the insertion groove 72, preferably, the sections of the insertion block 92 and the insertion groove 72 are both rectangular, and the surface of the insertion block 92 is slidably abutted to the surface of the groove wall of the insertion groove 72. First spring 91 sets up between the tank bottom of inserting groove 72 and inserting piece 92, it is concrete, the one end of first spring 91 is connected in the tank bottom of inserting groove 72 and the other end is connected in inserting piece 92, the lateral wall of guide rail 81 sets up and supplies inserting piece 92 grafting complex slot 811, when inserting piece 92 pegs graft in slot 811 on guide rail 81, guide rail 81 receives the motion spacingly in the length direction of mounting groove 71, and then make guide rail 81 be difficult for breaking away from mounting groove 71, installation piece 8 is installed on mount pad 7 firmly, furthermore, first spring 91 exerts the impetus toward slot 811 direction to inserting piece 92, first spring 91 is under natural state, inserting piece 92 pegs graft in slot 811, first spring 91 makes inserting piece 92 peg graft and is difficult for breaking away from when slot 811. When the mounting block 8 needs to be detached from the mounting base 7, the insertion block 92 is pulled to pull the insertion block 92 away from the insertion groove 811, so that the guide rail 81 of the mounting block 8 can slide out relative to the mounting groove 71 of the mounting base 7, and the mounting block 8 is detached.

In addition, the mounting seat 7 is provided with a through hole 73 communicated with the insertion groove 72, in the embodiment, the through hole 73 is arranged along the vertical direction, the cross section of the through hole 73 is rectangular, a sliding block 921 is welded on one side, facing the through hole 73, of the insertion block 92, the sliding block 921 is connected with the through hole 73 in a sliding mode, the sliding block 921 moves along the length direction of the insertion groove 72, the through hole 73 is connected with a pressing block 10 in a sliding mode, the pressing block 10 moves along the vertical direction, the cross section of the pressing block 10 is rectangular, and the outer surface of the pressing block 10 is in sliding abutting joint with the surface of the through hole 73. Further, the pressing block 10 and the slide block 921 are each provided with an inclined guide surface 11, and the guide surface 11 of the slide block 921 and the guide surface 11 of the pressing block 10 abut against each other and slide against each other. The pressing block 10 is pressed, the sliding block 921 is pressed by the pressing block 10, and the insertion block 92 is slid in the longitudinal direction of the insertion groove 72 by the guide surface 11 and is pulled out from the insertion groove 811.

Referring to fig. 3 and 4, a pressing plate 101 is integrally formed at one end of the pressing block 10 away from the sliding block 921 along the horizontal direction, and second springs 102 are disposed between the pressing plate 101 and the mounting base 7, specifically, the number of the second springs 102 is two, one end of each second spring 102 is connected to the pressing plate 101, and the other end is connected to the mounting base 7. When the pressing block 10 is pressed, the second spring 102 is compressed, and immediately after the pressing block 10 is released, the pressing block 10 is restored by the elastic force of the second spring 102, so that the pressing block 10 can be pressed repeatedly.

Referring to fig. 3, the fan 821 is disposed at the bottom of the mounting block 8, the fan 821 can adjust the air supply angle, specifically, the mounting block 8 is rotatably connected with the mounting shaft 82 along the horizontal direction, the fan 821 is welded on the mounting shaft 82, one end of the mounting shaft 82 extends out of the side wall of the mounting block 8, the other end of the mounting shaft 82 is integrally formed with the abutting block 19 abutting against the side wall of the mounting block 8, and one end of the mounting shaft 82 extending out of the mounting block 8 is connected with a nut 822 through a screw thread, which is preferably a butterfly nut in this embodiment. Nut 822 and installation piece 8's lateral wall butt, but the pivot is relative installation piece 8 rotation and has realized the regulation of fan 821 angle, and after the angle modulation finishes, nut 822 realizes the locking of installation axle 82 through screwing and with installation piece 8 butt, and then realizes the locking of fan 821.

Referring back to fig. 1 and 2, the two sides of the conveying frame 1 are integrally formed with a bearing block 12, in this embodiment, the shape of the bearing block 12 is preferably rectangular block-shaped, the bearing block 12 rotatably supports a lead screw 13 along the vertical direction, the lead screw 13 can rotate relative to the bearing block 12 through a bearing (not shown) installed in the bearing block, a bearing table 131 is integrally formed on the lead screw 13, the lower surface of the bearing table 131 abuts against the upper surface of the bearing block 12, and the mutual abutment between the bearing table 131 and the bearing block 12 enables the lead screw 13 to bear the pressure in the vertical direction. All welded on two long crossbeams 62 has the movable block 621 with lead screw 13 threaded connection, and lead screw 13 runs through the upper and lower surface of movable block 621, and when lead screw 13 rotated, vertical direction's motion was sat under the effect of lead screw 13 to movable block 621 drives mounting bracket 6 and realizes going up and down. The conveying frame 1 is welded with a guide block 14 connected with the support post 61 in a sliding manner, the guide block 14 is preferably rectangular, a guide hole (not shown) penetrating through the upper surface and the lower surface is arranged in the guide block 14, and the surface of the support post 61 is in sliding contact with the hole wall of the guide hole.

Referring to fig. 2 and 5, the bottom of the conveying frame 1 is provided with a transmission mechanism 15 for driving the two screw rods 13 to synchronously rotate, the transmission mechanism 15 includes a transmission shaft 151 rotatably connected to the bottom of the conveying frame 1 along a horizontal direction, and two pairs of bevel gears 152 disposed between the screw rods 13 and the transmission shaft 151 and engaged with each other, and the two pairs of bevel gears 152 are respectively disposed at two ends of the transmission shaft 151, two supporting blocks 16 are welded at the bottom of the conveying frame 1, a transmission shaft 151 sequentially penetrates through the two supporting blocks 16 and is rotatably supported in the two supporting blocks 16, one pair of bevel gears 152 are respectively located between one end of the transmission shaft 151 and the bottom end of one of the screw rods 13, the other pair of bevel gears 152 are respectively located between the other end of the transmission shaft 151 and the bottom end of the other screw rod 13, the rotation of the transmission shaft 151 is converted into the rotation of the screw rod 13 by the pair of bevel gears 152 which are meshed with each other, and the screw rod 13 drives the moving block 621 to drive the mounting frame 6 (assembled in fig. 1) to move along the vertical direction.

In addition, the conveying frame 1 is provided with a driving mechanism 17 for driving the screw rod 13 to rotate forward and backward, specifically, the driving mechanism 17 includes a servo motor 171 fixed at the bottom of the conveying frame 1 through bolts, and a first gear 172 and a second gear 173 fixedly sleeved on an output shaft of the servo motor 171 and the transmission shaft 151 respectively, and the first gear 172 and the second gear 173 are engaged with each other, wherein a method for fixing the first gear 172 and the second gear 173 to the transmission shaft is prior art, and is not described herein again. In addition, because the servo motor 171 has the effect that the output shaft can rotate positively and negatively, the servo motor 171 drives the transmission shaft 151 to rotate positively and negatively so as to enable the screw rod 13 to rotate positively and negatively, when the screw rod 13 rotates positively and positively, the mounting frame 6 can be lifted relative to the conveying frame 1 along the height direction, when the screw rod 13 rotates negatively, the mounting frame 6 can be lowered relative to the conveying frame 1 along the height direction, and the driving mechanism 17 drives the transmission shaft 151 to rotate.

It should be noted that, in the process of driving the two lead screws 13 to synchronously rotate by the transmission shaft 151, the two lead screws 13 are located at two ends of the rotating shaft, so that the rotating directions of the two lead screws 13 are opposite, and in order to achieve the effect that the two moving blocks 621 synchronously lift in the same direction, the thread turning directions of the two lead screws 13 need to be opposite, that is, the thread turning direction of one lead screw 13 is left-handed, and the thread turning direction of the other lead screw 13 is right-handed.

Referring back to fig. 1 and 2, the top end of the screw rod 13 is welded with a limiting block 132 for limiting the mounting frame 6 to be separated from the screw rod 13, when the moving block 621 moves to a certain distance, the limiting block 132 abuts against the moving block 621, and the limiting block 132 limits the mounting frame 6 so that the mounting frame cannot be separated from the screw rod 13. Meanwhile, the pillar 61 is provided with a first limiting boss 611 and a second limiting boss 612 at intervals along the length direction of the pillar 61, specifically, the first limiting boss 611 is located at the bottom end of the pillar 61 and is welded on the pillar 61, the second limiting boss 612 is located above the pillar 61 and is integrally formed with the pillar 61, and the guide block 14 is located between the first limiting boss 611 and the second limiting boss 612. When the support 61 slides to a certain distance in the guide block 14, the support 61 abuts against the first limit boss 611 or the second limit boss 612, and the first limit boss 611 and the second limit boss 612 limit the sliding distance of the support 61 in the guide block 14, so that the fan 821 is prevented from impacting the conveyor belt 4 due to excessive lifting of the mounting frame 6.

Further, the side wall of the pillar 61 is provided with scale lines 613 in the vertical direction. The graduation lines 613 can visually reflect the sliding distance of the support 61, and indirectly reflect the height lifting distance of the mounting rack 6, so that the worker can adjust the height of the fan 821 from the conveyor belt 4.

Referring to fig. 1 and 2, the discharge end 1002 of the conveying frame 1 is connected with an extension plate 18 through a bolt, the extension plate 18 is horizontally arranged, the extension plate 18 bears plastic strips and moves to the next step, and meanwhile, the plastic strips are prevented from dropping and bending on the ground when the discharge end 1002 discharges the plastic strips. In addition, the side wall of the extension plate 18 is integrally formed with a side baffle 181 arranged along the vertical direction, and the side baffle 181 blocks the material strip from extending out of the extension plate 18.

Referring to fig. 1 and 6, the outer surface of the conveying belt 4 is sequentially and fixedly provided with a plurality of anti-slip strips 41 along the conveying direction, and a single anti-slip strip 41 is arranged along the width direction of the conveying belt 4, so that the anti-slip strips 41 reduce the slip between the plastic strip and the conveying belt 4.

The implementation principle of the embodiment is as follows: drive two lead screw 13 forward or antiport through actuating mechanism 17, make the movable block 621 move toward lead screw 13 length direction, the movable block 621 moves along vertical direction promptly, thereby make the movable block 621 drive mounting bracket 6 and go up and down along vertical direction, at this moment, install fan 821 on the movable block 621 also relatively conveyer belt 4 and be close to or keep away from, the altitude mixture control of fan 821 has been realized, thereby the amount of wind that the plastic strip received has been changed, furthermore, pillar 61 slides and connects in guide block 14, guide block 14 has played the guide effect to mounting bracket 6 at the in-process that slides, make mounting bracket 6 more stable at the removal in-process.

The above embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The utility model provides a plastic strip air cooling system, includes carriage (1) and sets up the conveying mechanism on carriage (1), conveying mechanism includes final drive wheel (2), accessory drive wheel (3), connects conveyer belt (4) between final drive wheel (2) and accessory drive wheel (3) and connects and be used for driving final drive wheel (2) pivoted driving motor (5) on final drive wheel (2), its characterized in that: the conveying frame (1) is provided with a mounting frame (6), the mounting frame (6) comprises a plurality of support columns (61) arranged along the vertical direction and cross beams (62) connected between the support columns (61), a fan (821) is arranged between every two adjacent cross beams (62), the fan (821) is positioned right above the conveying belt (4), bearing blocks (12) are arranged on two sides of the conveying frame (1), the bearing block (12) is rotationally loaded with a screw rod (13) along the vertical direction, a moving block (621) which is in threaded connection with the screw rod (13) is arranged on the cross beam (62), the screw rod (13) penetrates through the upper surface and the lower surface of the moving block (621), a guide block (14) connected with the support post (61) in a sliding manner is fixedly connected to the conveying frame (1), and a driving mechanism (17) for driving the screw rod (13) to rotate positively and negatively is arranged on the conveying frame (1).

2. A plastic strip air cooling system as defined in claim 1, wherein: the conveying frame is characterized in that a transmission mechanism (15) used for driving the two screw rods (13) to synchronously rotate is arranged at the bottom of the conveying frame (1), the transmission mechanism (15) comprises a transmission shaft (151) which is connected to the conveying frame (1) in a rotating mode along the horizontal direction and two pairs of bevel gears (152) which are arranged between the screw rods (13) and the transmission shaft (151) and are meshed with each other, and the two pairs of bevel gears (152) are respectively located at two ends of the transmission shaft (151).

3. A plastic strip air cooling system as defined in claim 2, wherein: the driving mechanism (17) comprises a servo motor (171) fixedly connected to the bottom of the conveying frame (1) and a first gear (172) and a second gear (173) which are respectively fixedly sleeved on an output shaft of the servo motor (171) and the transmission shaft (151), and the first gear (172) is meshed with the second gear (173).

4. A plastic strip air cooling system as defined in claim 1, wherein: the top end of the screw rod (13) is provided with a limiting block (132) used for limiting the mounting rack (6) to be separated from the screw rod (13).

5. A plastic strip air cooling system as defined in claim 1, wherein: the strut (61) is provided with a first limiting boss (611) and a second limiting boss (612) at intervals along the length direction of the strut, and the guide block (14) is located between the first limiting boss (611) and the second limiting boss (612).

6. A plastic strip air cooling system as defined in claim 5, wherein: the side wall of the support post (61) is provided with scale marks (613) along the vertical direction.

7. A plastic strip air cooling system as defined in claim 1, wherein: the conveying frame (1) sequentially comprises a feeding end (1001) and a discharging end (1002), the discharging end (1002) of the conveying frame (1) is fixedly connected with an extension plate (18), and the extension plate (18) is horizontally arranged.

8. A plastic strip air cooling system as defined in claim 1, wherein: the outer surface of the conveying belt (4) is sequentially provided with a plurality of anti-slip strips (41) along the conveying direction.