CN218081366U

CN218081366U - Piston assembly production line equipment based on vision system

Info

Publication number: CN218081366U
Application number: CN202222245474.5U
Authority: CN
Inventors: 郝彦京
Original assignee: Tianjin Unien Technology Co ltd
Current assignee: Tianjin Unien Technology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-20
Anticipated expiration: 2032-08-25

Abstract

The utility model discloses a piston assembly production line equipment based on vision system, including material loading conveyer, gasket vision loading attachment, glue dripping unit and unloader. One side of the blanking conveying device is sequentially provided with a glue dripping device and an upper piston visual feeding device from one end to the other end, and the other end of the blanking conveying device is sequentially provided with an extruder, a blanking manipulator, a tray and a blanking device. When a workpiece enters the glue dripping unit, the glue dripping needle moves to the upper part of the workpiece through the glue dripping unit linear module, then the valve controls the air pump to fill air into the glue storage bin through the air inlet hole of the glue storage bin, and glue is dripped at the corresponding position of the workpiece from the glue storage bin through the glue storage tube and the glue dripping needle in a mode of increasing the pressure in the glue storage bin. Need carry out glue in the piston installation and fix, probably have some potential safety hazards in manual operation, the utility model discloses a machinery drips and glues, has both improved the industrial production level, has avoided the emergence of this kind of potential safety hazard moreover.

Description

Piston assembly production line equipment based on vision system

Technical Field

The utility model relates to an equipment specifically is piston assembly production line equipment based on vision system.

Background

When the piston assembly is assembled, a plurality of steps are needed to be completed, each step is in a different work area, products completed in each step need to be manually conveyed to the next step and then assembled, and the efficiency is affected. And the manual operation cost is high, and the level of the current industrial production is difficult to achieve. The piston rod is provided with a plurality of envelopes and gaskets, the shapes and the installation sequences of each envelope and gasket are different, and an automatic assembly system is not provided at present to avoid the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a piston assembly production line equipment based on vision system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

piston assembly production line equipment based on visual system, one side that the both sides of extruder set up material loading conveyer and unloading conveyer material loading conveyer is equipped with piston vision loading attachment by one end to the other end in proper order, magnetite feeding equipment, gasket vision loading attachment and extruder, material loading conveyer's opposite side is equipped with valve rod material loading unit and extruder material loading manipulator by one end to the other end in proper order, one side at unloading conveyer is equipped with glue dripping device and last piston vision loading attachment by one end to the other end in proper order, unloading conveyer's opposite side is equipped with extruder material unloading manipulator by one end to the other end in proper order, tray and unloader, including the bottom plate among the material loading conveyer, material loading conveying sharp module and tool, the bottom plate is fixed connection in the frame. The top fixedly connected with material loading conveying straight line module of bottom plate, the slip table fixedly connected with tool of material loading conveying straight line module, the tool is including rightting the manipulator, the tool board, the slip track, tool bottom plate and jack-up pole, tool bottom plate fixed connection is on the slip table of material loading conveying straight line module, fixedly connected with manipulator on the tool bottom plate, one side at the manipulator is equipped with the slip track, orbital horizontal end fixed connection slides on the tool bottom plate, the both sides sliding connection of tool board is in orbital vertical both sides of sliding, the tool board passes through the tool cylinder and realizes reciprocating, the tool board is equipped with circular through-hole, righting the top that snatchs the position of manipulator and just in time being in the top of through-hole, the below of the through-hole of tool board is equipped with the jack-up pole, fixed connection jack-up pole on the tool bottom plate. Gasket vision loading attachment, go up piston vision loading attachment and all take the vision system of multimode, vision system includes X to sharp module, a camera, Z is to sharp module, the vision manipulator, Y is to sharp module, workbin and vision system frame, vision system frame and workbin fixed connection are in the frame, the top of workbin is equipped with the camera, camera fixed connection is on the vision system frame, one side of workbin is equipped with X to sharp module, X is to the horizontal fixed connection of sharp module on the vision system frame, X is to the Y of the slip table fixed connection horizontally set up of sharp module to sharp module, Y is to the vertical Z of the slip table fixedly connected with of sharp module to sharp module, Z is to the slip table fixedly connected with vision manipulator on the sharp module.

As a further aspect of the present invention: the glue dripping unit substrate is fixedly connected to the frame. The one end of glue dripping unit bracing piece is connected to the fixed surface of glue dripping unit base plate, glue dripping unit bracing piece is close to the fixed position connection glue dripping unit straight line module of the other end, the slip table fixed connection of glue dripping unit straight line module stores up gluey storehouse, it is equipped with the inlet port to store up gluey storehouse outward, store up the outer fixed surface in gluey storehouse and connect the valve, the slip table fixed connection of valve is on the inlet port, the valve has an air pump through the pipe connection, store up gluey one end fixed connection rubber storage tube in storehouse, the other end fixed connection rubber needle that drips of rubber storage tube.

As a further aspect of the present invention: valve rod material loading unit base plate fixed connection is in the frame, fixed connection valve rod material loading unit support frame on the valve rod material loading unit base plate, fixed connection blank cylinder and slide rail on the valve rod material loading unit support frame surface, the one end and the blank cylinder fixed connection of slide rail, the last sliding surface of slide rail is connected with conveying platform, the slip table fixed connection of blank cylinder is on conveying platform, conveying platform's upper surface is equipped with a recess, valve rod material loading unit support frame is at the top fixedly connected with valve rod workbin of slide rail, be conveying platform's groove under the valve rod workbin discharge gate, conveying platform is in the initial position this moment. The push pedal is fixedly connected with in the both sides of valve rod workbin on the valve rod material loading unit support frame, and the stockpiling cylinder is prevented in the below fixedly connected with department of push pedal to valve rod material loading unit support frame, prevents the slip table fixed connection of stockpiling cylinder on the push pedal, the one end fixedly connected with valve rod unloading push pedal of valve rod material loading unit support frame.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a conveyer establishes ties each link of piston equipment together, improves work efficiency greatly. The work content of workers is lightened. Need carry out glue in the piston installation and fix, probably have some potential safety hazards in manual operation, the utility model discloses a machinery drips and glues, has both improved the industrial production level, has avoided the emergence of this kind of potential safety hazard moreover. The working efficiency of the feeding link can be improved through the visual system.

Drawings

Fig. 1 is a schematic structural diagram of piston assembly line equipment based on a vision system.

Fig. 2 is a schematic structural diagram of a feeding and conveying device in piston assembly line equipment based on a vision system.

Fig. 3 is a schematic structural diagram of a glue dripping unit in the piston assembly line equipment based on the vision system.

Fig. 4 is a schematic structural diagram of a valve rod feeding unit in the piston assembly line equipment based on the vision system.

Fig. 5 is a schematic structural view of a glue dropping bin in the glue dropping unit.

Fig. 6 is a schematic structural diagram of an upper piston visual feeding device in piston assembly line equipment based on a visual system.

Fig. 7 is a schematic view of a jig structure of a feeding and conveying device in a piston assembly line device based on a vision system.

Fig. 8 is a schematic structural diagram of a blanking conveying device in piston assembly line equipment based on a vision system.

FIG. 9 is a schematic diagram of a magnet feeding apparatus in a piston assembly line apparatus based on a vision system.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-9, in the embodiment of the present invention, a piston assembly line apparatus based on a vision system includes a frame-mounted feeding and conveying device 1, a valve rod feeding unit 2, a glue dripping unit 3, a gasket vision feeding device 4, an extruder 5, a feeding piston vision feeding device 6, a discharging device 7, a tray 8, an extruder discharging manipulator 9, an extruder feeding manipulator 10, a piston vision feeding device 11, a magnet feeding device 12 and a discharging and conveying device 13.

The two sides of the extruder 5 are provided with a feeding conveyer 1 and a discharging conveyer 13

Piston vision loading attachment 11, magnetite feeding equipment 12, gasket vision loading attachment 4 and extruder 5 are equipped with in proper order by one end to the other end in one side of material loading conveyer 1, and valve rod material loading unit 2 and extruder material loading manipulator 10 are equipped with in proper order by one end to the other end in the opposite side of material loading conveyer 1.

A glue dripping device 3 and an upper piston visual feeding device 6 are sequentially arranged on one side of the blanking conveying device 13 from one end to the other end, and an extruder blanking manipulator 9, a tray 8 and a blanking device 7 are sequentially arranged on the other side of the blanking conveying device 13 from one end to the other end.

The gasket visual feeding device 4, the upper piston visual feeding device 6 and the piston visual feeding device 11 all adopt visual systems of the same mode, and the visual systems comprise an X-direction linear module 401, a camera 402, a Z-direction linear module 403, a visual manipulator 404, a Y-direction linear module 405, a bin 406 and a visual system frame 407.

The vision system frame 407 and the bin 406 are fixedly connected to the rack, a camera 402 is arranged above the bin 406, the camera 402 is fixedly connected to the vision system frame 407, an X-direction straight line module 401 is arranged on one side of the bin 406, the X-direction straight line module 401 is horizontally and fixedly connected to the vision system frame 407, a horizontal Y-direction straight line module 405 is fixedly connected to a sliding table of the X-direction straight line module 401, a vertical Z-direction straight line module 403 is fixedly connected to a sliding table of the Y-direction straight line module 405, and a vision manipulator 404 is fixedly connected to the Z-direction straight line module 403.

During operation, after a piston on the piston visual feeding device 11 confirms the position of a workpiece through a visual system (by applying the prior art), a mechanical arm conveys magnets on the magnet feeding device 12 to the position above a piston on the feeding conveyer 1 through the mechanical arm after the mechanical arm conveys the magnets to the position above the magnet on the feeding conveyer 1, the mechanical arm conveys the magnets to the position above the magnet on the feeding conveyer 1 from a gasket on the gasket visual feeding device 4, the mechanical arm obtains a valve rod from the valve rod feeding bin 2, vertically inserts the valve rod into an assembled piston on the feeding conveyer 1 through the mechanical arm, and conveys the assembled parts on the feeding conveyer 1 to an extruder 5 through the extruder feeding mechanical arm 10 for extrusion, so that the assembled piston is molded into an integral structure. Then, an extrusion-molded workpiece is conveyed to the glue dripping device 3 by the extruder blanking manipulator 9, glue is dripped on the top of the workpiece by the glue dripping device 3, then the workpiece is conveyed to the upper piston visual feeding device 6 by the manipulator, an upper piston is fixed on the upper surface of the workpiece by glue on the upper piston visual feeding device 6, then the workpiece is conveyed to the blanking conveying device 13 by the manipulator, the workpiece is conveyed to the blanking device 7 by the blanking conveying device 13, and the workpiece is taken down from the blanking conveying device 13 by the manipulator and placed into the tray 8.

The loading and conveying device 1 comprises a bottom plate 101, a loading and conveying linear module 102 and a jig 103.

The bottom plate 101 is fixedly connected to the frame. A feeding and conveying linear module 102 is fixedly connected above the bottom plate 101, and a jig 103 is fixedly connected to a sliding table of the feeding and conveying linear module 102.

The jig 103 includes a righting robot 104, a jig plate 105, a slide rail 106, a jig base plate 107, and a jack-up rod 108. The tool bottom plate 107 is fixedly connected to the sliding table of the feeding conveying linear module 102, the manipulator 104 is fixedly connected to the tool bottom plate 107, a sliding rail 106 is arranged on one side of the manipulator, the horizontal end of the sliding rail 106 is fixedly connected to the tool bottom plate 107, and two sides of the tool plate 105 are slidably connected to the vertical two sides of the sliding rail. The jig plate 105 is moved up and down by the jig cylinder, and the jig plate 105 is provided with a circular through hole. The grabbing position of the righting manipulator 104 is just above the through hole, a jacking rod 108 is arranged below the through hole of the jig plate 105, the jacking rod 108 is fixedly connected to the jig base plate 107, the through hole of the jig moves to each feeding device in sequence in work, and the manipulator of each feeding device conveys a workpiece to the through hole of the jig plate 105.

The glue dripping unit 3 comprises a glue dripping unit substrate 301, a glue dripping unit support rod 302, a glue dripping unit linear module 303 and a glue dripping device 304, and the glue dripping device 304 comprises a valve 31, a glue storage tube 32, a glue dripping needle 33 and a glue storage bin 34.

The glue dripping unit substrate 301 is fixedly connected to the frame. The one end of glue dripping unit bracing piece 302 is connected to glue dripping unit 301's fixed surface, glue dripping unit bracing piece 302 is close to the position fixed connection glue dripping unit straight line module 303 of the other end, glue dripping unit straight line module 303's slip table fixed connection stores up gluey storehouse 34, store up gluey storehouse 34 and be equipped with the inlet port outward, store up gluey 34 outer fixed surface of storehouse and connect valve 31, valve 31's slip table fixed connection is on the inlet port, valve 31 has an air pump through the pipe connection, store up gluey 34 one end fixed connection glue storage pipe 32, glue storage pipe 32's other end fixed connection glue dripping needle 33.

When the work piece enters the glue dripping unit 3, the glue dripping needle 33 moves to the upper part of the work piece through the glue dripping unit linear module 303, then the valve 31 controls the air pump to fill air into the glue storage bin 34 through the air inlet hole of the glue storage bin 34, and glue is dripped from the glue storage bin 34 to the corresponding position of the work piece through the glue storage tube 32 and the glue dripping needle 33 in a mode of increasing the pressure intensity in the glue storage bin 34.

The valve rod feeding unit 2 comprises a valve rod feeding unit substrate 201, a valve rod feeding unit support frame 202, a valve rod blanking push rod 203, a valve rod bin 204, a push plate 205, a blanking air cylinder 206, an anti-stacking air cylinder 207, a conveying platform 208 and a slide rail 209.

Valve rod material loading unit base plate 201 fixed connection is in the frame, fixed connection valve rod material loading unit support frame 202 on the valve rod material loading unit base plate 201, valve rod material loading unit support frame 202 fixed connection blanking cylinder 206 and slide rail 209 on the surface, the one end and the blanking cylinder 206 fixed connection of slide rail 209, the last surface sliding connection of slide rail 209 has conveying platform 208, the slip table fixed connection of blanking cylinder 206 is on conveying platform 208, conveying platform 208's upper surface is equipped with a recess, valve rod material loading unit support frame 202 is at slide rail 209's top fixedly connected with valve rod workbin 204, be conveying platform's groove under the valve rod workbin 204 discharge gate, conveying platform is in the initial position this moment. Push plates 205 are fixedly connected to two sides of a valve rod material box 204 on the valve rod feeding unit supporting frame 202, a stockpiling air cylinder 207 is fixedly connected to the valve rod feeding unit supporting frame 202 below the push plates, a sliding table of the stockpiling air cylinder 207 is fixedly connected to the push plates 205, and a valve rod blanking device 203 is fixedly connected to one end of the valve rod feeding unit supporting frame 202.

During operation, a valve rod placed in the valve rod bin 204 enters the groove of the conveying platform 208 from a discharge port below the bin, the conveying platform 208 slides on the slide rail 209 through the material cutting cylinder 206 to the valve rod discharging push rod 203, and the valve rod is conveyed to the discharge port by the valve rod discharging push rod and is taken away by a manipulator for subsequent assembly. A gap is formed in the middle of the valve rod feed box 204, when the valve rods in the valve rod feed box 204 are stacked, the anti-stacking air cylinder 207 pushes the push plate 205 to enable the push plate 205 to extrude the valve rod feed box 204, and the clamped valve rods return to work continuously.

The blanking conveying device 13 includes a blanking base plate 1301, a blanking linear module 1302, a blanking stage 1303, a blanking jig frame 1304, and a blanking jig plate 1305. Unloading bottom plate 1301 fixed connection is in the frame, the straight line module 1302 of top fixedly connected with unloading of unloading bottom plate 1301, the output fixedly connected with unloading cargo platform 1303 of the straight line module 1302 of unloading, fixedly connected with unloading tool frame 1304 on unloading cargo platform 1303, unloading tool frame 1304 top fixed connection unloading tool board 1305. The blanking jig plate 1305 is provided with a circular through hole, and the manipulator of the extruder inserts a piston rod of an extruded workpiece into the circular through hole of the blanking jig plate 1305 in work.

The magnet feeding device 12 includes a magnet feeding frame 1201, a magnet ejector rod 1202, a rotary tray 1203, a magnet barrel 1204, a discharging limit plate 1205, a discharging plate 1206, a magnet barrel righting tray 1207, a magnet manipulator 1208, and a righting tray support rod 1209.

Magnetite feed frame 1201 fixed connection is in the frame, be equipped with circular hollow structure on the magnetite feed frame 1201, the hollow structure below is equipped with magnetite ejector pin 1202, magnetite ejector pin 1202 fixed connection is at the output of magnetite air pump, magnetite air pump fixed connection is on magnetite feed frame 1201, fixed connection rotating tray 1203 on the magnetite feed frame 1201, be equipped with a lot of circular hollow structure in the rotating tray, fixedly connected with magnetite bucket 1204 on the rotating tray 1203, be equipped with magnetite bucket centering plate 1207 and centering plate bracing piece 1209 on the rotating tray 1203, centering plate bracing piece 1209 fixed connection is on rotating tray 1203, magnetite bucket centering plate 1207 sliding connection is on magnetite bucket 1204, the top of magnetite bucket 1204 is equipped with ejection of compact board 1206, ejection of compact board 1206 fixed connection is on magnetite feed frame 1201, be equipped with 2 circular hollow structure 1205 on the ejection of compact board 1206, hollow structure's top is equipped with ejection of compact limiting plate 1205, ejection of compact limiting plate fixed connection is on the ejection of compact board 1206, one side fixedly connected with magnetite manipulator 1208 of magnetite feed frame 1201.

During operation, the magnet is manually sleeved outside the magnet barrel, during discharging, the hollow structure of the magnet barrel opposite to the discharging plate is guaranteed, the magnet ejector rod 1202 opposite to the hollow structure of the rotary charging tray 1203, the magnet ejector rod 1202 upwards jacks up the magnet barrel correcting disc 1207 through a round hole in the rotary charging tray through a magnet air pump, the magnet barrel correcting disc 1207 enables the magnet sleeved on the magnet barrel 1204 to be ejected out of the hollow structure of the discharging plate 1206, the discharging limiting plate 1205 guarantees that only one magnet comes out, and then the magnet is taken out through the magnet manipulator 1208. After the magnet carrier rods 1202 are taken out, the magnet carrier rods 1202 are retracted to the initial position, and the rotating tray 1203 is prevented from rotating to bend the magnet carrier rods 1202.

Claims

1. Piston assembly production line equipment based on a visual system comprises a feeding conveying device (1), a valve rod feeding unit (2), a glue dripping unit (3), a gasket visual feeding device (4), an extruding machine (5), a piston visual feeding device (6), a discharging device (7), a tray (8), an extruding machine discharging mechanical arm (9), an extruding machine feeding mechanical arm (10), a piston visual feeding device (11), a magnet feeding device (12) and a discharging conveying device (13), and is characterized in that the feeding conveying device (1) and the discharging conveying device (13) are arranged on two sides of the extruding machine (5), the valve rod feeding unit (2) and the extruding machine feeding mechanical arm (10) are sequentially arranged on one side of the feeding conveying device (1) from one end to the other end, the piston visual feeding device (11), the magnet feeding device (12), the gasket visual feeding device (4) and the discharging conveying device (5) are sequentially arranged on the other side of the feeding conveying device (1) from one end to the other end, the valve rod feeding unit (3) and the piston visual feeding unit (6) and the discharging mechanical arm (10) are sequentially arranged on one side of the discharging conveying device (13), the feeding conveying device (1) comprises a bottom plate (101), a feeding conveying linear module (102) and a jig (103), the bottom plate (101) is fixedly connected to a rack, the feeding conveying linear module (102) is fixedly connected to the upper portion of the bottom plate (101), the jig (103) is fixedly connected to a sliding table of the feeding conveying linear module (102), the jig (103) comprises a straightening manipulator (104), a jig plate (105), a sliding rail (106), a jig bottom plate (107) and a jacking rod (108), the jig bottom plate (107) is fixedly connected to the sliding table of the feeding conveying linear module (102), the manipulator (104) is fixedly connected to the jig bottom plate (107), the sliding rail (106) is arranged on one side of the manipulator, the horizontal end of the sliding rail (106) is fixedly connected to the jig bottom plate (107), two sides of the jig plate (105) are slidably connected to two vertical sides of the sliding rail, the jig plate (105) moves up and down through an air cylinder to realize vertical movement, the jig plate (105) is provided with a circular through hole, the position of the straightening manipulator (104) is just above the through hole, a visual through hole of the jig plate (105), a visual piston rod (108) is arranged below a visual piston-lifting device (11) and a visual piston-type piston-lifting device (11) is arranged below the visual-type feeding piston-type, visual system includes X to sharp module (401), camera (402), Z is to sharp module (403), vision manipulator (404), Y is to sharp module (405), workbin (406) and visual system frame (407), visual system frame (407) and workbin (406) fixed connection are in the frame, the top of workbin (406) is equipped with camera (402), camera (402) fixed connection is on visual system frame (407), one side of workbin (406) is equipped with X to sharp module (401), X is to sharp module (401) horizontal fixed connection on visual system frame (407), X is to sharp module (405) to the Y that the slip table fixed connection of sharp module (401) has the level to set up, Y is to the vertical Z of the slip table fixedly connected with of sharp module (405) to sharp module (403), Z is to fixedly connected with vision manipulator (404) on the slip table of sharp module (403).

2. The piston assembly production line equipment based on the vision system as claimed in claim 1, wherein the glue dropping unit (3) comprises a glue dropping unit substrate (301), a glue dropping unit support rod (302), a glue dropping unit linear module (303) and a glue dropping device (304), the glue dropping device (304) comprises a valve (31), a glue storage tube (32), a glue dropping needle (33) and a glue storage bin (34), the glue dropping unit substrate (301) is fixedly connected to the frame, the surface of the glue dropping unit substrate (301) is fixedly connected with one end of the glue dropping unit support rod (302), the glue dropping unit support rod (302) is close to the position of the other end and fixedly connected with the glue dropping unit linear module (303), the sliding table of the glue dropping unit linear module (303) is fixedly connected with the glue storage bin (34), the outer surface of the glue storage bin (34) is fixedly connected with the valve (31), one end of the glue storage bin (34) is fixedly connected with the glue storage tube (32), and the other end of the glue storage tube (32) is fixedly connected with the glue dropping needle (33).

3. The piston assembly production line equipment based on the vision system as claimed in claim 2, wherein an air inlet is arranged outside the glue storage bin (34), a sliding table of the valve (31) is fixedly connected to the air inlet, and the valve (31) is connected with an air pump through a pipeline.

4. The piston assembly production line equipment based on the vision system as claimed in claim 1, wherein the valve rod feeding unit (2) comprises a valve rod feeding unit substrate (201), a valve rod feeding unit support frame (202), a valve rod blanking push rod (203), a valve rod bin (204), a push plate (205), a blanking cylinder (206), a material piling preventing cylinder (207), a conveying platform (208) and a sliding rail (209), the valve rod feeding unit substrate (201) is fixedly connected to the frame, the valve rod feeding unit support frame (202) is fixedly connected to the valve rod feeding unit substrate (201), the valve rod feeding unit support frame (202) is fixedly connected to the surface of the valve rod feeding unit support frame (206) and the sliding rail (209), one end of the sliding rail (209) is fixedly connected to the blanking cylinder (206), the upper surface of the sliding rail (209) is slidably connected to the conveying platform (208), the sliding table of the blanking cylinder (206) is fixedly connected to the conveying platform (208), the upper surface of the conveying platform (208) is provided with a groove, the valve rod feeding unit support frame (202) is fixedly connected to the upper end of the valve rod feeding unit support frame (204) above the valve rod bin (209), and the valve rod feeding unit support frame (202) is connected to the initial discharge port of the conveying platform (204), and the valve rod feeding unit is connected to the lower end of the conveying platform (204).

5. The piston assembly production line equipment based on the vision system as claimed in claim 4, wherein push plates (205) are fixedly connected to two sides of the valve rod bin (204) on the valve rod feeding unit support frame (202), a stockpiling prevention cylinder (207) is fixedly connected to the valve rod feeding unit support frame (202) below the push plates, and a sliding table of the stockpiling prevention cylinder (207) is fixedly connected to the push plates (205).