CN110281505B

CN110281505B - Production equipment of plastic-coated hose

Info

Publication number: CN110281505B
Application number: CN201910527203.9A
Authority: CN
Inventors: 李国友
Original assignee: Anhui Zhonghong Rubber And Plastic Co ltd
Current assignee: Anhui Zhonghong Rubber And Plastic Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2021-06-25
Anticipated expiration: 2039-06-18
Also published as: CN110281505A

Abstract

The invention discloses production equipment of a plastic-coated hose, and particularly relates to the technical field of plastic-coated hose production, which comprises a base, wherein a hose braiding machine is arranged at the top of the base, an extruder is arranged at the output end of the hose braiding machine, a cooler is arranged at the output end of the extruder, and a winding correction mechanism is arranged on one side of the cooler; winding aligning gear is including fixed backplate, fixed backplate openly is fixed to be equipped with two guide rolls, two the guide roll leading flank all fixes and is equipped with the limiting plate, two guide roll one side is equipped with the action wheel, the inside main rotating shaft that is equipped with of action wheel, the action wheel bottom is equipped with from the driving wheel. According to the invention, the winding correction mechanism is arranged, so that the flexibility of the plastic-coated hose is improved, the plastic-coated hose is prevented from being damaged, the shape of the plastic-coated hose can be corrected, the driving and winding of the plastic-coated hose are synchronous, the storage coordination of the plastic-coated hose is effectively improved, the flexibility of the plastic-coated hose is ensured, and the production quality of the plastic-coated hose is improved.

Description

Production equipment of plastic-coated hose

Technical Field

The invention relates to the technical field of plastic-coated hose production, in particular to production equipment of a plastic-coated hose.

Background

The existing production equipment for the plastic-coated hose comprises an extruder, a cooling device and a winding device, wherein the winding device rotates and winds through a roller.

The invention patent of patent application publication No. CN105751542B discloses a production device of a plastic-coated hose, which comprises a weaving device, an extruder, a cooling device and a winding device which are arranged in sequence, wherein the starting end of the winding device is provided with a pressing mechanism for flattening the hose. The pressing mechanism is provided with a driving wheel and a pair of driven wheels, wherein the two driven wheels are arranged above the driving wheel and are respectively positioned on two sides of the driving wheel, so that on one hand, the hose can be deformed in an upward arch manner on the driving wheel, and thus the lower part of the hose is flattened, and on the other hand, the hose is extruded by the two driven wheels on two sides of the driving wheel, and thus the upper part of the hose is flattened; the two connecting rods are hinged through a rotating shaft, and the moving ring is fixed on the rotating shaft, so that the moving ring can drive the two connecting rods to move synchronously, and further drive the pair of driven wheels to move; the moving ring and the rocker are in threaded connection with each other to form a screw mechanism, the rocker is rotated, and the moving ring moves up and down along the rocker under the guiding action of the guide rod, so that the distance between the driven wheel and the driving wheel is adjusted.

However, in the actual use process, the driven wheels extrude the hose at two sides of the driving wheel in the process of winding the plastic-coated hose, so that the upper part of the hose is flattened, the plastic-coated hose is easy to deform, the hose is easy to damage due to large deformation after cooling, the shape of the plastic-coated hose cannot be corrected, and the production quality of the plastic-coated hose is influenced.

Disclosure of the invention

In order to overcome the above defects of the prior art, the embodiment of the invention provides a plastic-coated hose production device, wherein a winding correction mechanism is arranged, a main rotating shaft drives a driving wheel to rotate, a fourth rotating shaft drives a winding wheel to rotate, so that driving and winding are synchronously performed, then a sliding column pushes a driven wheel to contact with the driving wheel through a fixed frame to extrude a plastic-coated hose, the plastic-coated hose is arranged among a first horizontal extrusion wheel, a second horizontal extrusion wheel and a third horizontal extrusion wheel to horizontally extrude the shape of the plastic-coated hose, then the supported plastic-coated hose enters between two vertical extrusion wheels to vertically extrude and correct the supported plastic-coated hose, the flexibility of the plastic-coated hose is improved, the plastic-coated hose is prevented from being damaged, the shape of the plastic-coated hose can be corrected, the driving and winding of the plastic-coated hose are synchronous, and the storage coordination of the plastic-coated hose is effectively improved, the flexibility of the plastic-coated hose is ensured, and the production quality of the plastic-coated hose is improved so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the production equipment of the plastic-coated hose comprises a base, wherein a hose braiding machine is arranged at the top of the base, an extruder is arranged at the output end of the hose braiding machine, a cooler is arranged at the output end of the extruder, and a winding correction mechanism is arranged on one side of the cooler;

the winding correction mechanism comprises a fixed back plate, two guide rollers are fixedly arranged on the front surface of the fixed back plate, limiting plates are fixedly arranged on the front side surfaces of the two guide rollers, a driving wheel is arranged on one side of the two guide rollers, a main rotating shaft is arranged in the driving wheel, a driven wheel is arranged at the bottom of the driving wheel, a fixed frame is fixedly arranged on the outer side of the driven wheel, plastic-coated hose contact grooves are formed in the surfaces of the driving wheel and the driven wheel, a sliding column is fixedly arranged at the bottom of the fixed frame, a first spring is fixedly arranged at the bottom of the sliding column, a sliding cylinder is fixedly arranged at the bottom of the first spring, a fixed plate is fixedly arranged at the bottom of the sliding cylinder, the fixed plate is fixedly connected with the fixed back plate, first horizontal extrusion wheels are arranged on one sides of the driving wheel and the driven wheel, a second horizontal extrusion wheel, first horizontal extrusion wheel, second horizontal extrusion wheel and the inside first pivot that all is equipped with of third horizontal extrusion wheel, third horizontal extrusion wheel one side is equipped with perpendicular extrusion wheel, the inside second pivot that is equipped with of perpendicular extrusion wheel, second pivot top and bottom are all fixed and are equipped with the cardboard, the main pivot outside is equipped with the belt, main pivot one side is equipped with the third pivot, the third pivot openly is equipped with servo motor, main pivot opposite side is equipped with the fourth pivot, the fourth pivot outside is equipped with the rolling wheel, the fixed first restriction ring board that is equipped with in rolling wheel one side, perpendicular extrusion wheel one side is equipped with the extrusion roller.

In a preferred embodiment, the number of the first horizontal extrusion wheel, the second horizontal extrusion wheel and the third horizontal extrusion wheel is two, a fixing mechanism is arranged on the other side of the winding wheel, the fixing mechanism comprises a second limiting ring plate, and the second limiting ring plate is arranged on the outer side of the fourth rotating shaft.

In a preferred embodiment, a driving groove is formed in the second limiting ring plate, a clamping column is arranged on one side of the second limiting ring plate, an extrusion block is arranged at the top of the clamping column, and a lifting plate is arranged at the top of the extrusion block.

In a preferred embodiment, the bottom of the lifting plate is provided with a second spring, the second spring is arranged inside the driving groove, and the lifting plate is in sliding connection with the driving groove.

In a preferred embodiment, the second limiting ring plate and the surface of the winding wheel are provided with jacks, and button pins are arranged inside the jacks and matched with the jacks.

In a preferred embodiment, the sliding column is slidably connected with the sliding cylinder, and the first rotating shaft is fixedly connected with the fixed back plate.

In a preferred embodiment, the clamping plate is fixedly connected with the fixed back plate, and the output shaft of the servo motor is fixedly connected with the third rotating shaft.

In a preferred embodiment, the main rotating shaft and the fourth rotating shaft penetrate through the fixed back plate, and the main rotating shaft, the third rotating shaft and the fourth rotating shaft are in transmission connection through a belt.

The invention has the technical effects and advantages that:

1. by arranging the winding correction mechanism, the main rotating shaft drives the driving wheel to rotate, the fourth rotating shaft drives the winding wheel to rotate, so that the driving and the rolling are synchronously carried out, then the sliding column pushes the driven wheel to be contacted with the driving wheel through the fixed frame, extruding the plastic-coated hose among a first horizontal extrusion wheel, a second horizontal extrusion wheel and a third horizontal extrusion wheel, horizontally extruding the shape of the plastic-coated hose, then enabling the supported plastic-coated hose to enter between two vertical extrusion wheels, then vertically extruding and correcting the supported plastic-coated hose, improving the flexibility of the plastic-coated hose, avoiding the plastic-coated hose from being damaged, the shape of the plastic-coated hose can be corrected, the driving and the winding of the plastic-coated hose are synchronous, the storage coordination of the plastic-coated hose is effectively improved, the flexibility of the plastic-coated hose is ensured, and the production quality of the plastic-coated hose is improved;

2. through setting up fixed establishment, will press the button bolt and jack separation when needing to take, then the pulling lifter plate moves the extrusion piece and blocks the separation to with second restriction ring board and rolling wheel separation, then will accomodate the plastic-coated hose after taking off, the convenience carries out rapid and stable's rolling to the plastic-coated hose, promotes the convenience of rolling, guarantees the neat nature of plastic-coated hose rolling.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of the winding straightening mechanism of the present invention.

FIG. 3 is a schematic view of a portion A of FIG. 1 according to the present invention.

FIG. 4 is a schematic view of a portion B shown in FIG. 1 according to the present invention.

Fig. 5 is a schematic view of a partial structure of the part C in fig. 1 according to the present invention.

Fig. 6 is a schematic view of a partial structure of the portion D in fig. 2 according to the present invention.

Fig. 7 is a schematic view of a partial structure of the part E in fig. 2 according to the present invention.

Fig. 8 is a perspective view of a first horizontal pressing wheel, a second horizontal pressing wheel, a third horizontal pressing wheel and a vertical pressing wheel according to the present invention.

The reference signs are: the automatic winding machine comprises a base 1, a hose knitting machine 2, an extruder 3, a cooler 4, a winding straightening mechanism 5, a fixed back plate 6, a guide roller 7, a limiting plate 8, a driving wheel 9, a main rotating shaft 10, a driven wheel 11, a fixed frame 12, a plastic-coated hose contact groove 13, a sliding column 14, a first spring 15, a sliding cylinder 16, a fixed plate 17, a first horizontal extrusion wheel 18, a second horizontal extrusion wheel 19, a third horizontal extrusion wheel 20, a first rotating shaft 21, a vertical extrusion wheel 22, a second rotating shaft 23, a clamping plate 24, a belt 25, a third rotating shaft 26, a servo motor 27, a fourth rotating shaft 28, a winding wheel 29, a first limiting ring plate 30, an extrusion roller 31, a fixed mechanism 32, a second limiting ring plate 33, a driving groove 34, a clamping column 35, an extrusion block 36, a lifting plate 37, a second spring 38, a jack 39 and a button bolt 40.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The production equipment of the plastic-coated hose shown in the attached figures 1-8 comprises a base 1, wherein a hose braiding machine 2 is arranged at the top of the base 1, an extruder 3 is arranged at the output end of the hose braiding machine 2, a cooler 4 is arranged at the output end of the extruder 3, and a winding correction mechanism 5 is arranged on one side of the cooler 4;

the winding correction mechanism 5 comprises a fixed back plate 6, the fixed back plate 6 is fixedly provided with two guide rollers 7 in the front, the front side faces of the two guide rollers 7 are fixedly provided with a limiting plate 8, one side of each guide roller 7 is provided with a driving wheel 9, a main rotating shaft 10 is arranged inside the driving wheel 9, the bottom of the driving wheel 9 is provided with a driven wheel 11, the outer side of the driven wheel 11 is fixedly provided with a fixed frame 12, the surfaces of the driving wheel 9 and the driven wheel 11 are respectively provided with a plastic-coated hose contact groove 13, the bottom of the fixed frame 12 is fixedly provided with a sliding column 14, the bottom of the sliding column 14 is fixedly provided with a first spring 15, the bottom of the first spring 15 is fixedly provided with a sliding cylinder 16, the bottom of the sliding cylinder 16 is fixedly provided with a fixed plate 17, the fixed plate 17 is fixedly connected with the fixed back plate 6, one side of the driving wheel 9 and one side of the driven, a third horizontal extrusion wheel 20 is arranged on one side of the second horizontal extrusion wheel 19, first rotating shafts 21 are arranged inside the first horizontal extrusion wheel 18, the second horizontal extrusion wheel 19 and the third horizontal extrusion wheel 20, a vertical extrusion wheel 22 is arranged on one side of the third horizontal extrusion wheel 20, a second rotating shaft 23 is arranged inside the vertical extrusion wheel 22, clamping plates 24 are fixedly arranged at the top and the bottom of the second rotating shaft 23, a belt 25 is arranged on the outer side of the main rotating shaft 10, a third rotating shaft 26 is arranged on one side of the main rotating shaft 10, a servo motor 27 is arranged on the front side of the third rotating shaft 26, a fourth rotating shaft 28 is arranged on the other side of the main rotating shaft 10, a winding wheel 29 is arranged on the outer side of the fourth rotating shaft 28, a first limiting ring plate 30 is fixedly arranged on one side of the winding wheel 29, and an extrusion roller 31 is arranged on one side of the vertical;

the number of the first horizontal extrusion wheel 18, the second horizontal extrusion wheel 19 and the third horizontal extrusion wheel 20 is two;

the sliding column 14 is connected with the sliding cylinder 16 in a sliding manner, and the first rotating shaft 21 is fixedly connected with the fixed back plate 6;

the clamping plate 24 is fixedly connected with the fixed back plate 6, and an output shaft of the servo motor 27 is fixedly connected with the third rotating shaft 26;

the main rotating shaft 10 and the fourth rotating shaft 28 penetrate through the fixed back plate 6, and the main rotating shaft 10, the third rotating shaft 26 and the fourth rotating shaft 28 are in transmission connection through a belt 25.

The implementation mode is specifically as follows: the hose braiding machine 2 braids polyvinyl chloride materials and then conveys the polyvinyl chloride materials to the interior of the extruder 3 for extrusion molding, then the molded plastic-coated hoses are cooled by the cooler 4, then the plastic-coated hoses enter between the driving wheel 9 and the driven wheel 11 after being guided by the two guide rollers 7, the plastic-coated hoses are clamped in the plastic-coated hose contact groove 13 for positioning, then the plastic-coated hoses enter the vertical extrusion wheel 22 after passing through the space among the first horizontal extrusion wheel 18, the second horizontal extrusion wheel 19 and the third horizontal extrusion wheel 20, then the plastic-coated hoses enter the extrusion roller 31, then the plastic-coated hoses are wound on the surface of the winding wheel 29 for winding, then the servo motor 27 is opened, the servo motor 27 drives the third rotating shaft 26 to rotate, the third rotating shaft 26 drives the main rotating shaft 10 and the fourth rotating shaft 28 to rotate through the belt 25, then the main rotating shaft 10 drives the driving wheel 9 to rotate, the fourth rotating shaft 28 drives the winding wheel 29 to rotate, so that driving and winding are performed synchronously, meanwhile, the servo motor 27 drives the first spring 15 to push the sliding column 14 to slide in the sliding cylinder 16, then the sliding column 14 pushes the driven wheel 11 to contact with the driving wheel 9 through the fixed frame 12, the plastic-coated hose is extruded, the plastic-coated hose is arranged among the first horizontal extrusion wheel 18, the second horizontal extrusion wheel 19 and the third horizontal extrusion wheel 20, the shape of the plastic-coated hose is horizontally extruded, gas in the plastic-coated hose can prop up the plastic-coated hose in the extrusion process, then the propped plastic-coated hose enters between the two vertical extrusion wheels 22, then the propped plastic-coated hose is vertically extruded and corrected, the extrusion rollers 31 extrude and guide the plastic-coated hose again, so that the plastic-coated hose is in a propped state in the process from the guide rollers 7 to the extrusion rollers 31, and the flexibility of the plastic-coated hose is improved, avoid the plastic-coated hose to produce the damage, can correct the plastic-coated hose shape, the drive and the rolling of plastic-coated hose are carried out in step, and the effectual harmony that has promoted the plastic-coated hose and accomodate guarantees the compliance of plastic-coated hose, has promoted the production quality of plastic-coated hose.

The plastic-coated hose production equipment shown in fig. 5 and 7 further comprises a fixing mechanism 32, wherein the fixing mechanism 32 is arranged on the other side of the winding wheel 29, the fixing mechanism 32 comprises a second limiting ring plate 33, and the second limiting ring plate 33 is arranged on the outer side of the fourth rotating shaft 28;

a driving groove 34 is formed in the second limiting ring plate 33, a clamping column 35 is arranged on one side of the second limiting ring plate 33, an extrusion block 36 is arranged at the top of the clamping column 35, and a lifting plate 37 is arranged at the top of the extrusion block 36;

a second spring 38 is arranged at the bottom of the lifting plate 37, the second spring 38 is arranged inside the driving groove 34, and the lifting plate 37 is connected with the driving groove 34 in a sliding manner;

the surface of the second limiting ring plate 33 and the surface of the winding wheel 29 are both provided with a jack 39, a button bolt 40 is arranged in the jack 39, and the button bolt 40 is matched with the jack 39.

The implementation mode is specifically as follows: when the plastic-coated hose is fixed, the lifting plate 37 is pulled, the lifting plate 37 drives the extrusion block 36 to be separated from the clamping column 35, then the plastic-coated hose is sleeved outside the clamping column 35, the lifting plate 37 is loosened, the second spring 38 pushes the lifting plate 37 to slide inside the lower driving groove 34, then the lifting plate 37 drives the extrusion block 36 to extrude on the clamping column 35 to fix the plastic-coated hose, then the plastic-coated hose is wound and fixed, the button bolt 40 is separated from the jack 39 when the plastic-coated hose needs to be taken, then the lifting plate 37 is pulled to drive the extrusion block 36 to be separated from the clamping, so that the second limiting ring plate 33 is separated from the winding wheel 29, and then the plastic-coated hose after being taken down is taken down, the plastic-coated hose is conveniently wound quickly and stably, convenience in winding is improved, and regularity of the plastic-coated winding hose is guaranteed.

The working principle of the invention is as follows:

referring to the attached drawings 1-8 of the specification, by arranging the winding correction mechanism 5, the main rotating shaft 10 drives the driving wheel 9 to rotate, the fourth rotating shaft 28 drives the winding wheel 29 to rotate, so that the driving and the winding are carried out synchronously, then the sliding column 14 pushes the driven wheel 11 to contact with the driving wheel 9 through the fixing frame 12 to extrude the plastic-coated hose, the plastic-coated hose is arranged among the first horizontal extrusion wheel 18, the second horizontal extrusion wheel 19 and the third horizontal extrusion wheel 20 to horizontally extrude the shape of the plastic-coated hose, then the supported plastic-coated hose enters between the two vertical extrusion wheels 22 to vertically extrude and correct the supported plastic-coated hose, the flexibility of the plastic-coated hose is improved, the plastic-coated hose is prevented from being damaged, the shape of the plastic-coated hose can be corrected, the driving and the winding of the plastic-coated hose are synchronous, and the storage coordination of the plastic-coated hose is effectively improved, the flexibility of the plastic-coated hose is ensured, and the production quality of the plastic-coated hose is improved;

refer to description figure 5 and figure 7, through setting up fixed establishment 32, with button bolt 40 and jack 39 separation when needing to take, then pulling lifter plate 37 drives extrusion piece 36 and blocks the separation to with second restriction ring board 33 and the separation of wind-up wheel 29, then take off the plastic-coated hose after accomodating, conveniently carry out rapid and stable's rolling to the plastic-coated hose, promote the convenience of rolling, guarantee the regularity nature of plastic-coated hose rolling.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a production facility of plastic-coated hose, includes base (1), its characterized in that: the top of the base (1) is provided with a hose braiding machine (2), the output end of the hose braiding machine (2) is provided with an extruder (3), the output end of the extruder (3) is provided with a cooler (4), and one side of the cooler (4) is provided with a winding correction mechanism (5); the winding correction mechanism (5) comprises a fixed back plate (6), the fixed back plate (6) is fixedly provided with two guide rollers (7) in the front, the front side surface of each guide roller (7) is fixedly provided with a limiting plate (8), one side of each guide roller (7) is provided with a driving wheel (9), a main rotating shaft (10) is arranged inside each driving wheel (9), the bottom of each driving wheel (9) is provided with a driven wheel (11), the outer side of each driven wheel (11) is fixedly provided with a fixed frame (12), the surfaces of each driving wheel (9) and each driven wheel (11) are respectively provided with a plastic-coated hose contact groove (13), the bottom of each fixed frame (12) is fixedly provided with a sliding column (14), the bottom of each sliding column (14) is fixedly provided with a first spring (15), the bottom of each first spring (15) is fixedly provided with a sliding barrel (16), the bottom of each sliding barrel (, the fixed plate (17) is fixedly connected with the fixed back plate (6), one side of the driving wheel (9) and one side of the driven wheel (11) are respectively provided with a first horizontal extrusion wheel (18), one side of the first horizontal extrusion wheel (18) is provided with a second horizontal extrusion wheel (19), one side of the second horizontal extrusion wheel (19) is provided with a third horizontal extrusion wheel (20), the first horizontal extrusion wheel (18), the second horizontal extrusion wheel (19) and the third horizontal extrusion wheel (20) are respectively internally provided with a first rotating shaft (21), one side of the third horizontal extrusion wheel (20) is provided with a vertical extrusion wheel (22), the vertical extrusion wheel (22) is internally provided with a second rotating shaft (23), the top and the bottom of the second rotating shaft (23) are respectively and fixedly provided with a clamping plate (24), the outer side of the main rotating shaft (10) is provided with a belt (25), one side of the main rotating shaft (10) is provided with a third rotating shaft (26), a servo motor (27) is arranged on the front face of the third rotating shaft (26), a fourth rotating shaft (28) is arranged on the other side of the main rotating shaft (10), a winding wheel (29) is arranged on the outer side of the fourth rotating shaft (28), a first limiting ring plate (30) is fixedly arranged on one side of the winding wheel (29), and an extrusion roller (31) is arranged on one side of the vertical extrusion wheel (22);

the number of the first horizontal extrusion wheels (18), the number of the second horizontal extrusion wheels (19) and the number of the third horizontal extrusion wheels (20) are two, a fixing mechanism (32) is arranged on the other side of the winding wheel (29), the fixing mechanism (32) comprises a second limiting ring plate (33), and the second limiting ring plate (33) is arranged on the outer side of the fourth rotating shaft (28);

a driving groove (34) is formed in the second limiting ring plate (33), a clamping column (35) is arranged on one side of the second limiting ring plate (33), an extrusion block (36) is arranged at the top of the clamping column (35), and a lifting plate (37) is arranged at the top of the extrusion block (36);

a second spring (38) is arranged at the bottom of the lifting plate (37), the second spring (38) is arranged inside the driving groove (34), and the lifting plate (37) is connected with the driving groove (34) in a sliding manner;

the surfaces of the second limiting ring plate (33) and the winding wheel (29) are respectively provided with a jack (39), a button bolt (40) is arranged in each jack (39), and each button bolt (40) is matched with each jack (39);

the sliding column (14) is connected with the sliding cylinder (16) in a sliding mode, and the first rotating shaft (21) is fixedly connected with the fixed back plate (6);

the clamping plate (24) is fixedly connected with the fixed back plate (6), and an output shaft of the servo motor (27) is fixedly connected with the third rotating shaft (26);

fixed backplate (6) are all run through in main pivot (10) and fourth pivot (28), main pivot (10), third pivot (26) and fourth pivot (28) all are connected through belt (25) transmission.