CN220658001U - Carbon fiber surface treatment equipment - Google Patents

Abstract

The utility model belongs to the technical field of carbon fiber production and relates to carbon fiber surface treatment equipment, which comprises a processing table, a paint box and a material fixing mechanism, wherein a paint spraying groove is formed in the top of the processing table, a grid plate is arranged in the paint spraying groove, the paint spraying groove is divided into a paint spraying area and a paint buffer area by the grid plate, an inner groove is formed in the top of the grid plate, a first paint spraying pipe and an adjusting mechanism are installed in the inner groove, a second paint spraying pipe is installed on the adjusting mechanism, a plurality of paint spraying heads are arranged on the first paint spraying pipe and the second paint spraying pipe, a first diaphragm pump is arranged on the side wall of the paint box, and the material fixing mechanism comprises an installation box, a material fixing assembly, a lifting assembly and a rotating assembly. According to the utility model, the two material placing components are adopted to place the carbon fiber materials, and the positions of the two material placing components can be changed through rotating the components, so that the interval time of paint spraying of the two carbon fiber materials is reduced, and the efficiency of carbon fiber surface treatment is improved.

Description

Carbon fiber surface treatment equipment

Technical Field

The utility model relates to the technical field of carbon fiber production, in particular to carbon fiber surface treatment equipment.

Background

The carbon fiber is a novel fiber material of high-strength and high-modulus fiber with carbon content of more than 95%, which is formed by stacking organic fiber such as flaky graphite microcrystal along the axial direction of the fiber, and is carbonized and graphitized to obtain a microcrystal graphite material, and the microcrystalline graphite material is processed into a material product capable of meeting the use requirement after a composite material formed by using a carbon fiber product is processed by different processing methods, wherein the surface of the carbon fiber product is rough after being molded, and the surface of a finished product is required to be polished, polished and lacquered.

The utility model of China with the authorized bulletin number of CN219334618U discloses a surface treatment device for carbon fiber product production, which comprises an operation table, wherein a servo motor is fixedly arranged on the upper surface of a grid plate, the output end of the servo motor is fixedly connected with a rotating shaft, the top end of the rotating shaft is fixedly connected with a placing disc, the center of the upper surface of the placing disc is fixedly provided with a sucking disc, the upper surface of a first supporting seat is fixedly connected with a first diaphragm pump, and the lower surface and the side surface of an L-shaped paint spraying pipe are fixedly provided with paint spraying nozzles. This surface treatment device is used in carbon fiber goods production, through servo motor, pivot, placing the dish, sucking disc, first diaphragm pump, first lacquer pipe, first output tube, L shape lacquer pipe, the setting of spray paint mouth, adopt the fixed mode of sucking disc to place the carbon fiber goods of different specifications to fix on placing the dish, carbon fiber goods at the uniform velocity rotates under servo motor's drive and accepts the lacquer, can make carbon fiber goods surface lacquer evenly.

The above patents still have the disadvantages: after the paint is sprayed on the carbon fiber products, the carbon fiber products sprayed with the paint need to be taken down, then the carbon fiber products which are not sprayed with paint are loaded, and then the next paint spraying operation of the carbon fiber products can be performed, the waiting interval time is longer, and the continuous treatment efficiency of the carbon fiber surfaces is further affected.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the problem of how to improve the efficiency of continuous treatment of the carbon fiber surface.

The utility model provides carbon fiber surface treatment equipment, which comprises a processing table, a paint box and a material fixing mechanism, wherein a paint spraying groove is formed in the top of the processing table, a grid plate is arranged in the paint spraying groove, the paint spraying groove is divided into a paint spraying area and a paint buffer area by the grid plate, an inner groove is formed in the top of the grid plate, a first paint spraying pipe and an adjusting mechanism capable of adjusting the paint spraying area of the first paint spraying pipe are arranged in the inner groove, a plurality of paint spraying heads are arranged on the first paint spraying pipe and the second paint spraying pipe, a first diaphragm pump is arranged on the side wall of the paint box, the material fixing mechanism comprises a mounting box, a material fixing assembly, a lifting assembly for adjusting the height of the mounting box and a rotating assembly for driving the mounting box to rotate, the two material fixing assemblies are symmetrically arranged in the mounting box, the rotating assembly is arranged on the lifting assembly, the mounting box is connected with the rotating assembly, the processing table and the paint spraying box are arranged close to the first paint spraying pipe and the second paint spraying pipe, and the paint spraying groove wall of the first paint spraying pipe and the second paint spraying pipe are connected with the first diaphragm pump.

Preferably, the adjustment mechanism is including adjusting electric putter, linkage board and sliding plate, be equipped with the first perforation that supplies first pipe that sprays paint to pass and the second perforation that supplies the second pipe that sprays paint to pass on the linkage board, the both sides of indent all are equipped with the slide rail, be equipped with L template on the lateral wall of processing platform, it is the level setting on L template to adjust electric putter, the linkage board sets up on adjusting electric putter's output, the sliding plate slides and sets up in two slide rails, and the tail end of sliding plate runs through the groove of spraying paint and be connected with the linkage board, the second pipe that sprays paint passes through the clamp and fixes the top at the sliding plate.

Preferably, the second spray pipe includes spray painting portion, transfer pipe and bellows, the top at the sliding plate is fixed through the clamp to the spray painting portion, the transfer pipe runs through the setting on the lateral wall of processing platform, the one end and the first diaphragm pump of transfer pipe are connected, the both ends of bellows are connected with the other end and the spray painting portion of transfer pipe respectively.

Preferably, the bottom of the inner groove is provided with a plurality of paint leakage grooves.

Preferably, a recovery pipe penetrating through the paint spraying groove is arranged in the paint buffer area, a second diaphragm pump is arranged on the side wall of the paint box, and the recovery pipe is connected with the second diaphragm pump.

Preferably, the material fixed subassembly includes first motor, reducing gear box and places the dish, install the connecting axle on the reducing gear box, the front portion of placing the dish is equipped with a plurality of sucking discs, the back of placing the dish is equipped with the connection ring canal with all sucking disc intercommunication, be equipped with the connector on the connection ring canal, first motor setting is in the mounting box, the reducing gear box sets up on the outer wall that the installation was wanting, and the output fixed connection of reducing gear box and first motor, the connecting axle with place a set fixed connection.

Preferably, the rotating assembly comprises bearing seats, rotating shafts and a second motor, the bearing seats and the rotating shafts are both provided with two, one end of each rotating shaft is provided with a connecting disc, the two bearing seats are symmetrically arranged on two sides of the processing table, the bearing seats are connected with the lifting assembly, the two rotating shafts are respectively and rotatably arranged on the two bearing seats, the rotating shafts are fixedly connected with the mounting box through the connecting discs, the second motor is arranged on the lifting assembly, and the second motor is connected with one rotating shaft through a coupler.

Preferably, the lifting assembly comprises lifting cylinders, a first footstock, a second footstock and guide seats, wherein two lifting cylinders are arranged, at least two guide rods are arranged at the bottom of the first footstock, at least two guide seats are arranged, two lifting cylinders are symmetrically arranged on two sides of the processing table, the first footstock and the second footstock are respectively arranged at the tops of the two lifting cylinders, all guide seats are arranged under the first footstock, all guide rods are respectively arranged in all guide seats in a sliding mode, the second motor and one of the bearing seats are arranged on the first footstock, and the other bearing seat is arranged on the second footstock.

The utility model has the beneficial effects that:

firstly, according to the carbon fiber surface treatment equipment disclosed by the utility model, two material placing components are adopted to place carbon fiber materials, one material placing component is positioned in a paint spraying area to spray paint, meanwhile, the other material placing component can be used for simultaneously placing non-painted carbon fiber materials, the two material placing components can be changed in position through rotating the component, the interval time of paint spraying of the two carbon fiber materials is reduced, and the efficiency of carbon fiber surface treatment is improved.

Secondly, according to the carbon fiber surface treatment equipment disclosed by the utility model, the first paint spraying pipe and the second paint spraying pipe are arranged in the paint spraying area, and an upward spraying mode is adopted, so that the pollution caused by the fact that paint splashes to the outside of the processing table can be avoided.

Thirdly, according to the carbon fiber surface treatment equipment disclosed by the utility model, the paint spraying area of the first paint spraying pipe can be changed by adjusting the position of the sliding plate through adjusting the electric push rod, so that the equipment is suitable for paint spraying operation of the surfaces of carbon fiber materials with more sizes, and the flexibility is better.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a carbon fiber surface treatment apparatus according to the present utility model;

FIG. 2 is a top view of the carbon fiber surface treatment apparatus of the present utility model;

FIG. 3 is a schematic view of a carbon fiber surface treatment apparatus according to the present utility model;

FIG. 4 is a schematic diagram of a carbon fiber surface treatment apparatus according to the present utility model;

FIG. 5 is a schematic view of a portion of a carbon fiber surface treatment apparatus of the present utility model;

fig. 6 is a partial schematic view of the carbon fiber surface treatment apparatus of the present utility model.

Reference numerals: 1. a processing table; 11. a paint spraying groove; 2. a paint box; 21. a first diaphragm pump; 22. an L-shaped plate; 23. a recovery pipe; 24. a second diaphragm pump; 3. a material fixing mechanism; 31. a mounting box; 32. a material fixing assembly; 321. a first motor; 322. a reduction gearbox; 3221. a connecting shaft; 323. placing a tray; 3231. a suction cup; 3232. connecting a ring pipe; 3233. a connector; 33. a lifting assembly; 331. a lifting cylinder; 332. a first top base; 3321. a guide rod; 333. a second top base; 334. a guide seat; 34. a rotating assembly; 341. a bearing seat; 342. a rotating shaft; 3421. a connecting disc; 343. a second motor; 4. a grid plate; 41. an inner groove; 411. a paint leakage groove; 5. a first paint spray pipe; 51. a paint spray head; 6. a second paint spraying pipe; 61. a paint spraying part; 62. a transfer tube; 63. a bellows; 7. an adjusting mechanism; 71. adjusting the electric push rod; 72. a linkage plate; 721. a first perforation; 722. a second perforation; 73. a sliding plate; 74. a slide rail.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

In this embodiment, as shown in fig. 1 and 6, a carbon fiber surface treatment device includes a processing table 1, paint box 2 and material fixing mechanism 3, paint spraying groove 11 has been seted up at the top of processing table 1, be equipped with grid plate 4 in the paint spraying groove 11, grid plate 4 separates into paint spraying region and paint buffer zone with paint spraying groove 11, inner groove 41 has been seted up at the top of grid plate 4, install first paint spraying pipe 5 in the inner groove 41 and can adjust the adjustment mechanism 7 in the region of first paint spraying pipe 5 paint spraying, install the second paint spraying pipe 6 that is the L type on the adjustment mechanism 7, all be equipped with a plurality of paint spraying heads 51 on first paint spraying pipe 5 and the second paint spraying pipe 6, be equipped with first diaphragm pump 21 on the lateral wall of paint box 2, material fixing mechanism 3 includes mounting box 31, material fixing component 32, a rotary component 34 for adjusting the height of mounting box 31 is equipped with two, two material fixing components 32 symmetry sets up in mounting box 31, rotary component 34 sets up on lifting component 33, and the rotary component is connected with first paint spraying pipe 5 and second paint spraying pipe 6, set up the first paint spraying pipe 1, paint spraying box 2 is connected with first paint spraying pipe 5, paint spraying pipe 6, paint spraying groove 1 all sets up on the lateral wall of second paint spraying pipe 6, paint spraying machine 3 is equipped with first paint spraying pipe 3, paint spraying machine is equipped with a plurality of paint spraying machine, and is equipped with a diaphragm 3, and is convenient, and is left.

Two material fixed subassembly 32 have been adopted to fix two carbon fiber materials, and a carbon fiber material is located the district that sprays paint, and another is located the district that sprays paint directly over, and the carbon fiber material that is located the district that sprays paint carries out the operation of spraying paint, and the carbon fiber material that does not spray paint can be placed to the material fixed subassembly 32 that is located the district that sprays paint directly over, sprays paint and the material loading noninterference to improved the continuous treatment effeciency on carbon fiber surface, rotating assembly 34 can change the position of two material fixed subassembly 32, can adjust the height that carbon fiber material is located through lifting assembly 33.

During processing, the first diaphragm pump 21 works to pump paint into the first paint spraying pipe 5 and the second paint spraying pipe 6, then all the paint spraying heads 51 spray paint on the surfaces of carbon fiber materials in the paint spraying areas, the paint spraying areas of the first paint spraying pipe 5 can be adjusted through the adjusting mechanism 7, the adjusting mechanism 7 comprises an adjusting electric push rod 71, a linkage plate 72 and a sliding plate 73, a first perforation 721 for the first paint spraying pipe 5 to pass through and a second perforation 722 for the second paint spraying pipe 6 to pass through are arranged on the linkage plate 72, sliding rails 74 are arranged on two sides of the inner groove 41, L-shaped plates 22 are arranged on the side wall of the processing table 1, the adjusting electric push rod 71 is horizontally arranged on the L-shaped plates 22, the linkage plate 72 is arranged on the output end of the adjusting electric push rod 71, the sliding plate 73 is slidably arranged in the two sliding rails 74, the tail end of the sliding plate 73 penetrates through the paint spraying groove 11 to be connected with the linkage plate 72, and the second paint spraying pipe 6 is fixed on the top of the sliding plate 73 through a clamp.

Through adjusting electric putter 71 drive linkage board 72 and remove, the linkage board 72 drives the synchronous translation of sliding plate 73, and sliding plate 73 can shelter from the part on the first pipe that sprays paint 5 and spout paint head 51 to the realization changes the spray painting region of first pipe that sprays paint 5, in order to be applicable to the paint spraying operation on the carbon fiber material surface of more sizes.

The first paint spraying pipe 5 is hidden in the inner groove 41, and pollution caused by paint splashing can be avoided by adopting an upward spraying mode in a paint spraying area, so that the practicability is high.

Further, the second paint spraying pipe 6 includes a paint spraying portion 61, an adapter pipe 62 and a bellows 63, the paint spraying portion 61 is fixed at the top of the sliding plate 73 by a clamp, the adapter pipe 62 is penetratingly arranged on the side wall of the processing table 1, one end of the adapter pipe 62 is connected with the first diaphragm pump 21, and two ends of the bellows 63 are respectively connected with the other end of the adapter pipe 62 and the paint spraying portion 61.

When the sliding plate 73 moves horizontally, the second paint spraying pipe 6 moves synchronously with the sliding plate 73, and the corrugated pipe 63 is adopted to enable the whole length of the second paint spraying pipe 6 to be flexibly changed.

Further, the bottom of the inner groove 41 is provided with a plurality of paint leakage grooves 411, and paint entering the inner groove 41 can enter the paint buffer area through the paint leakage grooves 411.

Still further, be equipped with the recovery tube 23 that runs through spray paint groove 11 in the paint buffer zone, be equipped with second diaphragm pump 24 on the lateral wall of paint case 2, recovery tube 23 is connected with second diaphragm pump 24.

Paint located in the paint buffer can be recovered into the paint tank 2 by means of the second diaphragm pump 24 and the recovery pipe 23.

When spraying paint, the workman can place the carbon fiber material that does not spray paint on the material fixed subassembly 32 that is located the district of spraying paint directly over, material fixed subassembly 32 includes first motor 321, reducing gear box 322 and places the dish 323, install connecting axle 3221 on the reducing gear box 322, the front portion of placing the dish 323 is equipped with a plurality of sucking discs 3231, the back of placing the dish 323 is equipped with the coupling collar 3232 with all sucking discs 3231 intercommunication, be equipped with connector 3233 on the coupling collar 3232, first motor 321 sets up in mounting box 31, the reducing gear box 322 sets up on the outer wall of mounting box 31, and reducing gear box 322 and the output fixed connection of first motor 321, connecting axle 3221 and placing the dish 323 fixed connection.

All sucking discs 3231 are placed with carbon fiber materials, and the placing discs 323 can be driven to slowly rotate through the cooperation of the first motor 321 and the reduction gearbox 322, so that the paint spraying heads 51 on the first paint spraying pipes 5 can evenly spray paint on the surfaces of the carbon fiber materials, and of course, the first motor 321 and the reduction gearbox 322 can adopt a reciprocating driving mode of clockwise rotation and anticlockwise rotation, so that damage to pipelines connected with the connectors 3233 can be avoided.

After the carbon fiber material that does not spray paint is placed on the material fixed subassembly 32 that is located the district that sprays paint directly over, wait for the carbon fiber material that is located the district that sprays paint to accomplish the operation of spraying paint, can make the carbon fiber material that accomplishes the paint and the carbon fiber material that does not spray paint accomplish the position change through rotating assembly 34, rotating assembly 34 includes bearing frame 341, pivot 342 and second motor 343, bearing frame 341 and pivot 342 all are equipped with two, the one end of pivot 342 is equipped with connecting disc 3421, two bearing frame 341 symmetry sets up in the both sides of processing platform 1, and bearing frame 341 is connected with lifting assembly 33, two pivots 342 rotate respectively and set up on two bearing frames 341, pivot 342 passes through connecting disc 3421 and mounting box 31 fixed connection, second motor 343 sets up on lifting assembly 33, and second motor 343 passes through the shaft coupling and is connected with one of them pivot 342.

The second motor 343 and the shaft coupling drive the corresponding rotating shaft 342 to rotate 180 degrees, and the rotating shaft 342 drives the mounting box 31 to rotate 180 degrees around the axis of the rotating shaft 342, so that the positions of the carbon fiber materials which are sprayed with paint and the carbon fiber materials which are not sprayed with paint are exchanged, and of course, the driving mode of the second motor 343 can also adopt a reciprocating driving mode of clockwise half-turn and anticlockwise half-turn, so that the safety is higher.

After the replacement is completed, the carbon fiber materials in the paint spraying area are enabled to be close to the first paint spraying pipe 5 through the lifting component 33 so as to ensure the paint spraying quality, the lifting component 33 comprises lifting cylinders 331, a first top seat 332, a second top seat 333 and guide seats 334, the lifting cylinders 331 are provided with two lifting cylinders 331, the bottom of the first top seat 332 is provided with at least two guide rods 3321, the guide seats 334 are provided with at least two lifting cylinders 331 which are symmetrically arranged on two sides of the processing table 1, the first top seat 332 and the second top seat 333 are respectively arranged on the tops of the two lifting cylinders 331, all the guide seats 334 are arranged under the first top seat 332, all the guide rods 3321 are respectively arranged in all the guide seats 334 in a sliding mode, the second motor 343 and one bearing seat 341 are arranged on the first top seat 332, and the other bearing seat 341 is arranged on the second top seat 333.

The two lifting cylinders 331 work simultaneously, the first top seat 332 and the second top seat 333 can synchronously lift, that is, the mounting box 31 can synchronously lift, and the lifting stability of the first top seat 332 can be improved through the cooperation of the guide rod 3321 and the guide seat 334.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (8)

1. The utility model provides a carbon fiber surface treatment equipment, its characterized in that includes processing platform (1), paint box (2) and material fixed establishment (3), paint spraying groove (11) have been seted up at the top of processing platform (1), be equipped with grid board (4) in paint spraying groove (11), grid board (4) separate into paint spraying district and paint buffer zone with paint spraying groove (11), inner groove (41) have been seted up at the top of grid board (4), install first paint spraying pipe (5) and can adjust adjustment mechanism (7) in the area of first paint spraying pipe (5) in inner groove (41), install second paint spraying pipe (6) that are L type on adjustment mechanism (7), all be equipped with a plurality of paint spraying heads (51) on first paint spraying pipe (5) and second paint spraying pipe (6), be equipped with first diaphragm pump (21) on the lateral wall of paint box (2), material fixed establishment (3) are including box (31), material fixed subassembly (32), be used for adjusting box (31) high lift subassembly and two fixed subassembly (32) of drive are used for adjusting box (32) are installed in two fixed subassembly (31), rotating assembly (34) set up on lifting unit (33), and install box (31) are connected with rotating assembly (34), processing platform (1) and paint box (2) are close to the setting, first spray paint pipe (5) and second spray paint pipe (6) all run through the cell wall of spray paint groove (11), first spray paint pipe (5), second spray paint pipe (6) all are connected with first diaphragm pump (21).

2. The carbon fiber surface treatment apparatus according to claim 1, wherein: the utility model provides an adjusting mechanism (7) is including adjusting electric putter (71), linkage board (72) and sliding plate (73), be equipped with on linkage board (72) and supply first perforation (721) that first spray paint pipe (5) passed and supply second perforation (722) that second spray paint pipe (6) passed, the both sides of indent (41) all are equipped with slide rail (74), be equipped with L template (22) on the lateral wall of processing platform (1), adjust electric putter (71) and be the level setting on L template (22), linkage board (72) set up on the output of adjusting electric putter (71), sliding plate (73) slip sets up in two slide rails (74), and the tail end of sliding plate (73) runs through spray paint groove (11) and is connected with linkage board (72), second spray paint pipe (6) are fixed at the top of sliding plate (73) through the clamp.

3. The carbon fiber surface treatment apparatus according to claim 2, wherein: the second paint spraying pipe (6) comprises a paint spraying part (61), a switching pipe (62) and a corrugated pipe (63), wherein the paint spraying part (61) is fixed at the top of a sliding plate (73) through a clamp, the switching pipe (62) is arranged on the side wall of a processing table (1) in a penetrating mode, one end of the switching pipe (62) is connected with a first diaphragm pump (21), and two ends of the corrugated pipe (63) are connected with the other end of the switching pipe (62) and the paint spraying part (61) respectively.

4. A carbon fiber surface treatment apparatus according to claim 3, wherein: the bottom of the inner groove (41) is provided with a plurality of paint leakage grooves (411).

5. The carbon fiber surface treatment apparatus according to claim 1 or 2 or 3 or 4, characterized in that: the paint spraying device is characterized in that a recovery pipe (23) penetrating through the paint spraying groove (11) is arranged in the paint cache area, a second diaphragm pump (24) is arranged on the side wall of the paint box (2), and the recovery pipe (23) is connected with the second diaphragm pump (24).

6. The carbon fiber surface treatment apparatus according to claim 1, wherein: the utility model provides a material fixed subassembly (32) includes first motor (321), reducing gear box (322) and places dish (323), install connecting axle (3221) on reducing gear box (322), the front portion of placing dish (323) is equipped with a plurality of sucking discs (3231), the back of placing dish (323) is equipped with connection ring canal (3232) with all sucking discs (3231) intercommunication, be equipped with connector (3233) on connection ring canal (3232), first motor (321) set up in installation box (31), reducing gear box (322) set up on the outer wall that the installation was wanting, and output fixed connection of reducing gear box (322) and first motor (321), connecting axle (3221) and placing dish (323) fixed connection.

7. The carbon fiber surface treatment apparatus according to claim 6, wherein: the rotating assembly (34) comprises bearing seats (341), rotating shafts (342) and a second motor (343), the bearing seats (341) and the rotating shafts (342) are both provided with two, one end of each rotating shaft (342) is provided with a connecting disc (3421), the two bearing seats (341) are symmetrically arranged on two sides of the processing table (1), the bearing seats (341) are connected with the lifting assembly (33), the two rotating shafts (342) are respectively arranged on the two bearing seats (341) in a rotating mode, the rotating shafts (342) are fixedly connected with the mounting box (31) through the connecting disc (3421), the second motor (343) is arranged on the lifting assembly (33), and the second motor (343) is connected with one rotating shaft (342) through a coupling.

8. The carbon fiber surface treatment apparatus according to claim 7, wherein: lifting component (33) are including lift cylinder (331), first footstock (332), second footstock (333) and guide holder (334), lift cylinder (331) are equipped with two, the bottom of first footstock (332) is equipped with two at least guide bars (3321), guide holder (334) are equipped with two at least, and two lift cylinder (331) symmetry sets up the both sides at processing platform (1), first footstock (332) and second footstock (333) set up the top at two lift cylinders (331) respectively, and all guide holders (334) set up under first footstock (332), and all guide bars (3321) slide respectively and set up in all guide holders (334), second motor (343) and one of them bearing frame (341) set up on first footstock (332), and another bearing frame (341) set up on second footstock (333).