CN109093277B

CN109093277B - Device for welding a hydrodynamic torque converter

Info

Publication number: CN109093277B
Application number: CN201811176022.8A
Authority: CN
Inventors: 潘利锋
Original assignee: Hangzhou Kingnet Electromechanical Co ltd
Current assignee: Hangzhou Kingnet Electromechanical Co ltd
Priority date: 2018-10-10
Filing date: 2018-10-10
Publication date: 2020-12-15
Anticipated expiration: 2038-10-10
Also published as: CN109093277A

Abstract

The invention discloses equipment for welding a hydraulic torque converter, which comprises a frame; the working platform is arranged on the rack; the welding device comprises welding guns, wherein the distance between every two adjacent welding guns is equal, and the welding guns are arranged annularly; and the discharging device is used for placing a plurality of hydraulic torque converters to be processed and conveying the next hydraulic torque converter to be processed to the lower part of the welding device after one hydraulic torque converter is processed. According to the hydraulic torque converter, the discharging device is arranged, a plurality of hydraulic torque converters to be processed can be placed on the discharging device in the processing process, and the discharging device can rapidly convey materials in the processing process, so that the processed hydraulic torque converters and the hydraulic torque converters to be processed can be rapidly switched, and the processing efficiency of the hydraulic torque converters is improved in the processing process.

Description

Device for welding a hydrodynamic torque converter

Technical Field

The invention belongs to the technical field of welding, and particularly relates to equipment for welding a hydraulic torque converter.

Background

With the continuous development of the automobile industry, the conventional automobile is changed from the original manual transmission automobile to the automatic transmission automobile when being operated, so that the controllability of the automobile is simplified; at present, most automatic transmission automobiles of family cars in the market adopt electronic transmission to change the transmission, and trucks need more materials due to high horsepower, so the electronic transmission cannot be applied to the trucks; the automatic gear of present freight train mostly adopts torque converter to carry out the change of keeping off the position, and current torque converter outer wall need weld through welder to can improve torque converter's whole quality.

At present, the existing welding process is mainly to adopt a single welding gun to carry out butt welding on the upper shell and the lower shell of the hydraulic torque converter, the process requirement on welding is low in the process, the material is conveyed through a slide rail, the material is put down from one side, then the material enters into the lower part of the welding gun from one side, then the welding gun is used for welding, after the welding is finished for each time to the single material in the process, the material is taken out, then the material is placed on the slide rail again, the material assembling time consumption in the process is long, and the processing efficiency is low.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the equipment for welding the hydraulic torque converter, which has the advantages of simple structure, balanced thermal stress, high discharging speed and high processing efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme: an apparatus for welding a torque converter comprising

A frame;

the working platform is arranged on the rack;

the welding device comprises welding guns, wherein the distance between every two adjacent welding guns is equal, and the welding guns are arranged annularly;

the rotating device is used for driving the hydraulic torque converter to be positioned and driving the hydraulic torque converter to rotate at the rotating speed of 5-12 mm/s when the welding gun works;

and the discharging device is used for placing a plurality of hydraulic torque converters to be processed and conveying the next hydraulic torque converter to be processed to the lower part of the welding device after one hydraulic torque converter is processed.

According to the hydraulic torque converter processing device, the discharging device is arranged, a plurality of hydraulic torque converters to be processed can be placed on the discharging device in the processing process, and the discharging device can rapidly transport materials in the processing process, so that the processed hydraulic torque converters and the hydraulic torque converters to be processed can be rapidly switched, and the processing efficiency of the hydraulic torque converters is improved in the processing process; the three welding devices are arranged in an annular and equidistant manner, so that an included angle between the two welding devices is 120 degrees, the three welding devices are used for synchronous welding, three thermal stresses can be generated on the outer wall of the welding devices at the same time, and the thermal stresses can be balanced with each other because the three thermal stresses are equilateral triangles, so that the condition that one side is opened is avoided in the welding process, the welding effect is good, and the whole hydraulic torque converter is not required to be damaged by applying excessive pressure in the welding process; through setting up rotating device, it drives torque converter and rotates with 5mm/s-12 mm/s's rotational speed at the in-process of welding, this rotational speed can keep whole device torque converter homoenergetic to be welded on the one hand, on the other hand avoid under this rotational speed that the time of welding overlength leads to torque converter whole melting volume big, lead to whole torque converter to appear damaging, guarantee the quality of whole torque converter after the welding is accomplished, improve whole torque converter's life.

Furthermore, the discharging device comprises a rotary table for placing materials, a power part for driving the rotary table to rotate and a reduction box matched with the power part, and the power part and the reduction box are both arranged below the rotary table; the hydraulic torque converter arranged on the rotary table can be switched by rotating the rotary table, so that when the hydraulic torque converter is machined, a plurality of machining procedures are carried out, and the machining efficiency is improved; the power part and the reduction gearbox are arranged below the turntable, so that the power part and the reduction gearbox are easy to install on one hand, and can be prevented from influencing the liquid discharge torque converter on the other hand.

Furthermore, a plurality of supporting pieces for supporting the rotating disc are arranged on the working platform, and rolling pieces are arranged on the supporting pieces; through setting up support piece, can support the edge of carousel, improve the stability of sabot to still can avoid on the carousel all weight to press on the reducing gear box and cause the increase of power part energy consumption, reduce the processing cost.

Furthermore, a pressing block is connected to the working platform, and a pressing wheel for pressing the rotary table is movably connected to the pressing block; through the setting of briquetting and pinch roller, can follow work platform's up end and carry on spacingly to the carousel, keep carousel up end and work platform up end to keep flat mutually to can also avoid the carousel to take place the condition of one section perk, improve the stability of sabot in the course of the work.

Furthermore, the rotating device comprises a driving motor, a speed reducing component matched with the driving motor and a fixed seat used for connecting the hydraulic torque converter, and the fixed seat is matched with the speed reducing component; the arrangement of the fixed seat can facilitate the direct arrangement of the hydraulic torque converter on the fixed seat in the process of welding the hydraulic torque converter, and the fixation is convenient; and set up the speed reduction part and then can reduce when the rotational speed that can reduce when driving motor output transmits on the fixing base can be reduced, and then torque converter can reach predetermined rotational speed when rotating.

Furthermore, a blocking structure for disconnecting the matching of the fixed seat and the speed reducing part is connected to the turntable; the matching between the fixed seat and the speed reduction part can be disconnected through the blocking structure, so that the material can be conveyed again by the rotary disc.

Furthermore, the blocking structure comprises a pushing block movably connected with the turntable and a pushing cylinder used for pushing the pushing block to move upwards, and the fixed seat is arranged on the pushing block; the pushing block is jacked up through the pushing cylinder, so that the fixed seat and the material can be effectively disconnected.

Furthermore, the fixed seat comprises a positioning piece for positioning the hydraulic torque converter, a gear sleeve matched with the speed reduction part and an intermediate body for connecting the first gear sleeve and the positioning piece, and the push block is connected with the intermediate body; can cooperate with the reduction part through first tooth cover to driving motor passes through the reduction part and drives the fixing base rotates.

Further, the speed reduction part comprises a speed reduction structure and a second gear sleeve connected with the output shaft in a rotation stopping manner, and the first gear sleeve is matched with the second gear sleeve; the second gear sleeve can be meshed with the first gear sleeve, and then the second gear sleeve rotates to drive the first gear sleeve to synchronously rotate, so that the fixed seat drives the hydraulic torque converter to rotate.

Furthermore, the pressing device comprises a pressing part which can be abutted against the upper part of the hydraulic torque converter, a pressing air cylinder for pushing the pressing part to move up and down and a supporting base for fixing the pressing air cylinder, and the supporting base is connected with the working platform; the pressure of compressing tightly the cylinder during operation can directly be used on compressing tightly the part, then compresses tightly torque converter through compressing tightly the part, and the height when this in-process can improve compressing tightly the cylinder installation avoids compressing tightly the cylinder because of leading to compressing tightly the cylinder to receive the influence of welder temperature near too near apart from torque converter, causes to compress tightly the pressure of inside in the cylinder and receives the influence, and it can effectual protection compress tightly the cylinder, prolongs the life who compresses tightly the cylinder.

In conclusion, by arranging the discharging device, a plurality of hydraulic torque converters to be processed can be placed on the discharging device in the processing process, and the discharging device can rapidly transport materials in the processing process, so that the processed hydraulic torque converters and the hydraulic torque converters to be processed can be rapidly switched, and the processing efficiency of the hydraulic torque converters is improved in the processing process.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial structural diagram of the first embodiment of the present invention.

Fig. 3 is a partial structural schematic diagram of the present invention.

Fig. 4 is a first structural schematic diagram of the welding device of the present invention.

FIG. 5 is a second schematic structural diagram of the welding apparatus of the present invention.

Fig. 6 is an enlarged view of a in fig. 5.

Fig. 7 is a schematic view of a partial structure of the present invention.

Fig. 8 is a partial structural diagram of the present invention.

Fig. 9 is a partial schematic structural diagram of the present invention.

Fig. 10 is an exploded view of fig. 9.

Fig. 11 is a partial structural diagram six of the present invention.

Fig. 12 is a schematic diagram of a partial structure according to the present invention.

Fig. 13 is a partial schematic structural diagram eight of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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.

As shown in fig. 1-13, an apparatus for welding a torque converter includes a frame 1, a work platform 2, a welding device 3, a rotating device 4 and a pressing device 5, wherein the frame 1 is a metal frame, the frame 1 can be directly placed on the ground, the work platform 2 is a platform formed by a metal plate, and the work platform 2 is placed on the frame 1; the welding device 3 is used for welding the torque converter, the number of the welding devices 3 is three, the welding device 3 comprises welding guns 31, one welding device 3 corresponds to one welding gun, the welding guns 31 are electric welding guns existing in the market, and are prior art, so that the details are not repeated herein; the three welding guns 31 are arranged in a ring shape, and the distance between two adjacent welding guns 31 is the same, so that the three welding guns 31 are in an equilateral triangle shape, when the hydraulic torque converter is welded, the three welding guns 31 surround the hydraulic torque converter in the middle, and when the hydraulic torque converter is welded, the three welding guns 31 simultaneously weld the hydraulic torque converter.

Further, the welding device 3 further includes a fixing member 32, a positioning member 33 and a driving member 34, wherein the fixing member 32 includes a clamping member 321, a connecting rod 322 and a connecting member 323, the clamping member 321 is a metal block, the clamping member 321 includes a first clamping block 301 having a semicircular notch and a second clamping block 302 having a semicircular opening, the second clamping block 302 is connected to the first clamping block 301 by a screw, and the first clamping block 301 is longer than the second clamping block 302; the connecting rod 322 is a metal tube with an internal control, and the connecting rod 322 is partially inserted into the first clamping block 301 and is connected with the first clamping block 301 through a screw or a rivet; the outer wall of the connecting rod 322 is provided with a rotation stopping convex part 325, and the rotation stopping convex part 325 is a convex strip; the connecting piece 323 is sleeved on the connecting rod 322, and the connecting piece 323 is made of metal; specifically, the connecting member 323 includes a first connecting portion 381 capable of being sleeved on the connecting rod 322, a tubular second connecting portion 382, and a third connecting portion 383 connecting the first connecting portion 381 and the second connecting portion 382, wherein the first connecting portion 381 is a small section of metal pipe, and a rotation preventing opening 326 is formed along a length direction of the first connecting portion 381, so that when the first connecting portion 381 is sleeved on the connecting rod 322, the rotation preventing protrusion 325 is clamped in the rotation preventing opening 326, and the first connecting portion 301 has an extending portion 304 formed by extending downward, and the extending portion 304 is connected by a bolt, so as to reduce a tubular cavity in the first connecting portion 301, and further fasten the first connecting portion 301 and the connecting rod 322.

Further, the positioning member 33 includes a positioning rail 331 and a connecting base 332, the positioning rail 331 is a cylindrical metal rod, the connecting base 332 is a metal block, the connecting base 332 is connected to the positioning rail 331, the second connecting portion 302 is a sleeve, the second connecting portion 302 is sleeved on the positioning rail 331, and a locking member 327 is connected to the second connecting portion 302, the locking member 327 is a bolt, an end of the locking member 327 can penetrate into the second connecting portion 302, so that when the locking member 327 rotates, the connecting member 322 can be connected to the second connecting portion 302; in order to enhance the connection tightness between the second connecting portion 302 and the positioning rail 331, a non-slip portion 328 is disposed on the positioning rail 331, and the non-slip portion 328 is formed by downwardly recessing the upper end surface of the positioning rail 331.

Specifically, the driving member 34 includes a slide rail 341, a slider 342, and a driving member 343, the slide rail 341 is a metal strip fixed on the inner wall of the frame body 1, the slider 342 is a metal block, the slider 342 has a concave portion formed by a recess, the slider 342 is fitted over the slide rail 341, and the slider 342 is connected to the connection base 332 by a screw; the driving member 343 is a cylinder, a pull rod 348 is connected to an end of the driving member 343, the pull rod 348 is a metal rod, and the slider 342 is connected to the driving member 343, so that the driving member 343 can pull the slider 342 to move up and down, thereby moving the positioning member 33, the fixing member, and the welding gun 31 up and down.

Further, a larger circular opening is formed in the center of the working platform 2, a discharging device 6 for placing a plurality of hydraulic torque converters to be machined is arranged in the center of the working platform 2, and the discharging device 6 conveys the next hydraulic torque converter to be machined to the position below the welding device 3 after one hydraulic torque converter is machined; specifically, the emptying device 6 comprises a turntable 61, a power part 62 and a reduction box 63, wherein the turntable 61 is a metal disc, and in order to reduce the weight of the whole turntable 61, the middle part of the turntable 61 is provided with a plurality of through cavities; the power part 62 is a motor existing in the market, the reduction gearbox 63 is a reduction gearbox existing in the market, an output shaft of the power part 62 is connected with a shaft in the reduction gearbox 63, and the specific connection mode is the prior art, so that the detailed description is omitted; the output shaft of the reduction box 63 is connected with the turntable, so that the reduction box 63 can be driven to rotate through a power part, the reduction box 63 further drives the turntable 61 to rotate, and the power part 62 and the reduction box 63 are both arranged below the turntable 61.

Furthermore, a plurality of supporting pieces 21 for supporting the rotating disc are arranged on the working platform 2, each supporting piece is an L-shaped metal block, one end of each supporting piece is connected with the lower end face of the working platform, a rolling piece 22 is arranged on the other end of each supporting piece, and each rolling piece 22 is a metal ball; the turntable 64 is erected on the rolling element 22; meanwhile, a pressing block 23 is further arranged on the working platform, the pressing block 23 is a metal block, a pressing wheel 24 is arranged on the pressing block 23, the pressing wheel 24 is a bearing, and the pressing wheel 24 is in contact with the upper end face of the rotary table 61.

Further, the rotating device 4 includes a driving motor 41, a decelerating member 42 and a fixing base 43, the driving motor 41 is a servo motor, and an output shaft of the driving motor 41 penetrates into the decelerating member 42; the fixing base 43 includes a positioning member 431, a first toothed sleeve 432 and an intermediate body 433, the positioning member 431 is a metal pipe with a notch at the upper part, the intermediate body 433 is a flange with a ring of convex ring at the lower edge, and the positioning member 431 is connected with the intermediate body 433; the first gear sleeve 432 is a metal pipe having annularly arranged convex teeth on a lower end surface, and the first gear sleeve 432 is connected with the lower part of the intermediate body 433 through a metal bearing in a rotation stopping manner, so that the first gear sleeve 432 rotates, and the positioning member 431 also rotates along with the first gear sleeve 432; the number of the fixing seats 43 is four, and the four fixing seats 43 are all arranged on the turntable 61 and move together with the rotation of the turntable 61.

Specifically, the driving motor 41 is disposed below the turntable 61, the number of the driving motors 41 is one, the speed reduction unit 42 includes a speed reduction structure and a second gear sleeve 421, the speed reduction structure is a sun-and-planet gear set, the second gear sleeve 421 is in rotation-stopping connection with a shaft extending from the speed reduction structure, and the second gear sleeve 421 is a metal pipe having a convex tooth on an upper end surface; when the torque converter is used, the fixed seat 43 moves above the second gear sleeve 421 along with the turntable, and then under the pressure of the pressing device 5, the whole fixed seat 42 is pushed to move downward together with the torque converter, so that the first gear sleeve 432 is meshed with the second gear sleeve 421, and the driving motor 41 can drive the fixed seat 43 to rotate, thereby driving the torque converter to rotate.

Further, a blocking structure 64 for blocking the engagement between the first gear sleeve 432 and the second gear sleeve 421 is connected to the rotary plate 61; the blocking structure 64 includes a pushing block 641 movably connected to the turntable 61 and a pushing cylinder 642 for pushing the pushing block 641 to move upward; the push block 641 is a metal block with a circular opening in the middle, and the push block 641 is sleeved on the intermediate body 433 and is fixedly connected with the intermediate body through a metal disc and a screw; the push cylinder 642 is a conventional cylinder, and the push cylinder 642 is connected to the push block 641 through a metal rod, so that the push cylinder 642 can push the push block 641 to move upward after the electric welding of the torque converter is completed.

Specifically, the pressing device 5 includes a pressing member 51, a pressing cylinder 52 and a supporting base 53, the supporting base 53 is an inverted L-shaped metal rod formed by connecting two metal profiles, the supporting base 53 is connected to the working platform 2, the pressing cylinder 52 is disposed on the supporting base 53, and the pressing cylinder 52 is a conventional cylinder; the pressing cylinder 52 is connected through the pressing member 51, the pressing member 51 includes a push rod 511 and a sleeve body 512, the push rod 511 is a metal rod, the upper portion of the push rod 511 is connected to the pressing cylinder 52, the lower portion of the push rod 511 is connected to the sleeve body 512, the sleeve body 512 is a metal sleeve, and the sleeve body 512 is sleeved on the upper portion of the torque converter when the torque converter is pressed.

In order to improve the overall strength of the welded hydraulic torque converter, a grinding device 7 is further arranged on the working platform, and the grinding device 7 is used for grinding the welded hydraulic torque converter; the grinding device 7 includes a grinding machine 71, a rotating member 72 and a pressing member 73, wherein the grinding machine 71 is a grinding machine directly available in the market, which is a prior art, and therefore, the details thereof are not repeated herein; the rotating member 72 includes a rotating electric machine 721, a reduction gear set 722, and a third gear set 723, wherein the rotating electric machine 721 is a servo motor, and the reduction gear set 722 is a sun planetary gear set; an output shaft of the rotating electric machine 721 is connected to the reduction gear set 722, the third gear sleeve 723 is identical to the second gear sleeve 421, and the third gear sleeve 723 is connected to the reduction gear set 722; the pressing component 73 comprises a cylinder 731, a pressing rod 732 and a pressing sleeve 733, the pressing rod 732 is a vertically arranged metal rod, the pressing sleeve 733 is a metal sleeve, one end of the pressing rod 732 is connected with the cylinder 731, and the other end of the pressing rod 732 is connected with the pressing sleeve 733, so that the cylinder 731 pushes the pressing sleeve 733 to be in contact with the upper end of the hydraulic torque converter, and downward pressure is applied to the hydraulic torque converter; therefore, when the rotating disc 61 moves to the position of the polishing device 6 with the torque converter after polishing, the pressing member 73 presses down the torque converter, and the pressure causes the first gear sleeve 432 to be connected with the third gear sleeve 723, so that the rotating electrical machine 721 drives the fixed seat to rotate; the pressing member is connected to the working platform by a fixing member 74, and the fixing member 74 is completely identical to the supporting base, so that the details are not repeated herein.

Further, a material blocking member 75 is provided on the frame 1, the material blocking member 75 is provided between the welding device 3 and the polishing device 6, the material blocking member 75 includes a first blocking member 751, a second blocking member 752 and a cylinder member 753, the first blocking member 751 is a metal blocking member connected to the frame 1, the second blocking member 752 is a metal plate, the cylinder member 753 is a conventional cylinder, the cylinder member 753 is connected to the second blocking member 752 through a connecting rod 754, the connecting rod 754 is a metal rod, and the cylinder member 753 is fixed above the first blocking member 751 through a metal frame, so that the cylinder member 753 can drive the second blocking member 752 to move up and down.

Further, a splash-proof curtain 11 is arranged on the frame 1, and the splash-proof curtain 11 is a high-temperature-resistant curtain; similarly, a winding component 12 for winding up and down the splash screen is further disposed on the frame 1, the winding component 12 includes a winding rod 121 and a winding motor 122, the winding rod 121 is a metal rod, the winding rod 121 is located at the upper portion of the frame 1, a bearing is sleeved on one end of the winding rod 121, the winding rod is movably connected to the frame 1 through the bearing, and the other end of the winding rod 121 is connected to the winding motor 122 through a gear, so that the winding rod 121 can be driven to rotate by the winding motor 122; the lower end of the splash proof curtain 11 is connected with a suspension rod 13, and the suspension rod 13 is a metal cross rod; the rack 1 is provided with a limiting rod 10, the limiting rod 10 is a metal rod arranged along the height direction of the rack 1, the hanging weight upper rod is provided with a notch through which the limiting rod 10 can be sleeved, and therefore when the splash-proof curtain 11 is put down, the hanging weight rod 13 can move downwards along the limiting rod 10.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.

Claims

1. An apparatus for welding a torque converter, characterized by: comprises that

A frame (1);

a pressing device (5);

the working platform (2) is arranged on the rack;

the welding device comprises at least three welding devices (3) for welding the hydraulic torque converter, wherein each welding device (3) comprises welding guns (31), the distance between every two adjacent welding guns (31) is equal, and the welding guns (31) are arranged annularly;

the rotating device (4) is used for driving and positioning the hydraulic torque converter and driving the hydraulic torque converter to rotate at the rotating speed of 5-12 mm/s when the welding gun (31) works;

the discharging device (6) is used for placing a plurality of hydraulic torque converters to be processed and conveying the next hydraulic torque converter to be processed to the position below the welding device (3) after one hydraulic torque converter is processed;

the discharging device (6) comprises a rotary table (61) for placing materials, a power part (62) for driving the rotary table (61) to rotate and a reduction box (63) matched with the power part (62), wherein the power part (62) and the reduction box (63) are both arranged below the rotary table (61);

a plurality of supporting pieces (21) for supporting the rotating disc are arranged on the working platform (2), and rolling pieces (22) are arranged on the supporting pieces (21);

a pressing block (23) is connected to the working platform (2), and a pressing wheel (24) for pressing the rotary table (61) is movably connected to the pressing block (23);

the working platform (2) is further provided with a grinding device (7), the grinding device (7) comprises a grinding machine (71), a rotating part (72) and a pressing part (73), the rotating part (72) comprises a rotating motor (721), a reduction gear set (722) and a third gear sleeve (723), the pressing part (73) comprises a cylinder (731), a pressure lever (732) and a pressing sleeve (733), the pressure lever (732) is a vertically arranged metal rod, the pressing sleeve (733) is a metal sleeve, one end of the pressure lever (732) is connected with the cylinder (731), and the other end of the pressure lever (732) is connected with the pressing sleeve (733);

the rotating device (4) comprises a driving motor (41), a speed reducing component (42) matched with the driving motor (41) and a fixed seat (43) used for being connected with the hydraulic torque converter, wherein the fixed seat (43) is matched with the speed reducing component (42);

the rotary table (61) is connected with a blocking structure (64) for disconnecting the fixed seat (43) from being matched with the speed reducing component (42);

the blocking structure (64) comprises a push block (641) movably connected with the turntable (61) and a pushing cylinder (642) used for pushing the push block (641) to move upwards, and the fixed seat (43) is arranged on the push block (641);

the fixed seat (43) comprises a positioning piece (431) for positioning the hydraulic torque converter, a first gear sleeve (432) matched with the speed reducing component (42) and an intermediate body (433) for connecting the first gear sleeve (432) and the positioning piece (431), and the push block (641) is connected with the intermediate body (433);

the speed reducing component (42) comprises a speed reducing structure and a second gear sleeve (421) connected with the speed reducing structure in a rotation stopping way, and the first gear sleeve (432) is matched with the second gear sleeve (421);

the pressing device (5) comprises a pressing component (51) capable of abutting against the upper part of the hydraulic torque converter, a pressing air cylinder (52) used for pushing the pressing component (51) to move up and down and a supporting base (53) used for fixing the pressing air cylinder (52), and the supporting base (53) is connected with the working platform (2).