CN210339226U - Supporting device for radial stacker - Google Patents
Supporting device for radial stacker Download PDFInfo
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- CN210339226U CN210339226U CN201920833825.XU CN201920833825U CN210339226U CN 210339226 U CN210339226 U CN 210339226U CN 201920833825 U CN201920833825 U CN 201920833825U CN 210339226 U CN210339226 U CN 210339226U
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Abstract
The utility model relates to a radial windrow machine strutting arrangement. An inner protection cylinder assembly and an outer protection cylinder assembly are sleeved outside the supporting oil cylinder, and a chassis assembly is further arranged at the lower part of the inner protection cylinder assembly; the inner protection cylinder component and the outer protection cylinder component are mutually sleeved and are in sliding fit along axial direction, the inner protection cylinder component comprises an inner cylinder and a ball head flange ear plate seat arranged at the opening of the lower end of the inner cylinder, the outer protection cylinder component comprises an outer cylinder and an upper cover arranged at the upper end of the outer cylinder, the upper end of an oil cylinder is hinged with the upper cover through a pin shaft, the lower end of a piston rod of a piston is hinged with the ball head flange ear plate seat through a pin shaft, the lower end of the ball head flange ear plate seat is hinged with a chassis component through a ball head, and a connecting plate used for being connected with a head frame of a radial. The problem that an oil cylinder of the supporting device is subjected to radial force in the working process is avoided, and the oil cylinder is prevented from being frequently damaged; meanwhile, even if the ground is uneven, the chassis of the supporting device cannot rotate in work.
Description
Technical Field
The invention relates to a supporting device for a radial stacker.
Background
The radial stacker is a common device applied to distribution and stacking of bulk materials such as copper ores, aluminum ores and coal mines, and generally comprises a truss, a telescopic belt conveyor, a tail walking part, a head walking part, a supporting device, a steering cylinder of the head walking part, a hydraulic station, an electric cabinet, a cab, a pedestrian walkway platform and the like. When the radial stacker travels linearly, the head traveling part and the tail traveling part are placed in parallel; when the radial stacker does sector motion, the head walking part and the tail walking part are vertically or nearly vertically placed, the tail walking part is kept still, and the head walking part rotates around a rotary bearing at the upper end of the tail walking part to complete sector distribution. When the front and back straight line walking and the fan-shaped stacking of the radial stacker are switched, the head walking part is supported and suspended by the supporting device arranged at the head, then the head walking part is rotated by about 90 degrees by the steering oil cylinder, and the head supporting device is retracted to complete the steering of the head walking part. The two supporting devices are generally arranged and are symmetrically arranged on the rack of the head walking part in the left-right direction, and the two sides of the truss are hung with components such as a hydraulic station and an electric cabinet, so that the center of gravity of the equipment always has a certain offset distance to the hanging side of the hydraulic station. Meanwhile, the grounding points of the two supporting devices can have different heights at any time, and the working conditions are very complicated.
The existing supporting device of the radial stacker is to weld a connecting flange outside a cylinder barrel of a supporting oil cylinder, and the connecting flange is installed on a head rack of the radial stacker through bolts. One end of the piston rod is a piston and is arranged in the cylinder barrel; the other end of the piston rod is in a cross axle structure and is connected with the chassis. Namely, the supporting oil cylinder directly supports the equipment, and the oil cylinder is connected with the chassis through a cross axle structure. When the supporting oil cylinder is used, the head of the equipment is supported only in the head-tail direction of the equipment, and in addition, the ground working condition is not changeable, the supporting oil cylinder is not vertical to the ground, and the included angle between the supporting oil cylinder and the ground is changed constantly, so that the oil cylinder is subjected to great radial force in the head-tail direction of the equipment. On the other hand, components such as a hydraulic station, an electric cabinet and the like are hung on two sides of the truss, the gravity center of the equipment often has a certain offset distance towards the hanging side of the hydraulic station, so that the load difference of the two supporting oil cylinders is large in the supporting process, the equipment is inclined to a certain extent in the supporting process, and the supporting oil cylinders are stressed unevenly in the left and right directions to cause the 'strength building'.
Therefore, it is desirable to provide a new technique for improving the problem of the conventional radial stacker that the support cylinder is damaged.
Disclosure of Invention
The invention aims to provide a supporting device for a radial stacker, which aims to solve the technical problem that a supporting oil cylinder of the conventional radial stacker is frequently damaged.
The supporting device for the radial stacker adopts the following technical scheme: the supporting device for the radial stacker comprises a supporting oil cylinder assembly, wherein the supporting oil cylinder assembly comprises a supporting oil cylinder, a bearing and a balance valve, the supporting oil cylinder comprises a piston and an oil cylinder which are in sliding fit, the supporting oil cylinder assembly further comprises an inner protecting cylinder assembly and an outer protecting cylinder assembly, the inner protecting cylinder assembly and the outer protecting cylinder assembly are sleeved outside the supporting oil cylinder, and a chassis assembly is further arranged at the lower part of the inner protecting cylinder assembly; the inner protection cylinder component and the outer protection cylinder component are mutually sleeved and are in sliding fit along axial direction, the inner protection cylinder component comprises an inner cylinder and a ball head flange ear plate seat arranged at the opening of the lower end of the inner cylinder, the outer protection cylinder component comprises an outer cylinder and an upper cover arranged at the upper end of the outer cylinder, the upper end of an oil cylinder is hinged with the upper cover through a pin shaft, the lower end of a piston rod of a piston is hinged with the ball head flange ear plate seat through a pin shaft, the lower end of the ball head flange ear plate seat is hinged with a chassis component through a ball head, and a connecting plate used for being connected with a head frame of a radial.
Further, an outer barrel flange is arranged at the upper end of the outer barrel, and the outer barrel flange is connected with the upper cover through a bolt assembly; the lower end of the inner cylinder is provided with an inner cylinder flange, and the inner cylinder flange is connected with the ball head flange ear plate seat through a bolt component.
Furthermore, the upper part of the outer cylinder is provided with an opening for installing the balance valve, and the outer protection cylinder assembly further comprises a dust guard plate for covering the opening of the outer cylinder and a double-lip dust guard ring arranged between the outer cylinder and the inner cylinder.
Furthermore, the outer cylinder comprises an upper section and a lower section which are welded with each other, an axially extending guide groove is arranged in the lower section, and a guide boss which is matched with the guide groove in an axial guide mode is arranged outside the inner cylinder.
Furthermore, the ball flange ear plate seat further comprises a ball flange and a connecting ear plate connected to the upper portion of the ball flange, the ball flange is connected with the inner barrel flange through bolts, the connecting ear plate is hinged to the lower end of the piston rod through a pin shaft, and the ball is fixed to the ball flange.
Further, the chassis assembly comprises a chassis and a ball head pressing cover, the chassis comprises a ball seat, the ball seat is provided with a spherical groove, the ball head is hinged in the spherical groove, the ball seat is connected with the ball head pressing cover through a bolt, and a foot pin is further arranged at the lower part of the ball seat.
Furthermore, the periphery of round pin axle has the ring groove, the ring inslot is equipped with the baffle in order to prevent the round pin axle drunkenness.
By adopting the technical scheme, the invention has the beneficial effects that: when the supporting device of the radial stacker is installed on the radial stacker for use, the inner and outer protective cylinder assemblies are arranged outside the oil cylinder, so that the problem that the oil cylinder of the supporting device is subjected to radial force in the working process is solved, and the oil cylinder is prevented from being frequently damaged; meanwhile, the spherical hinge structure is arranged on the chassis of the chassis assembly to adapt to complex working conditions, and even if the ground is uneven, the chassis of the supporting device cannot rotate in the working process.
Furthermore, a hydraulic oil loop is adjusted, two control modes of the supporting device and a signal for completing supporting are provided, and one-key lifting of the head walking part of the radial stacker is achieved. The invention improves the reliability of the equipment and brings good economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a support device for a radial stacker of the present invention in a contracted state;
FIG. 2 is a cross-sectional view of the support device for a radial stacker of the present invention in an extended state;
FIG. 3 is a schematic cross-sectional view taken along line A-A in FIG. 2 (showing the outer barrel upper cover, the pin and the baffle);
FIG. 4 is a schematic cross-sectional view taken at B-B of FIG. 2 (showing the outer barrel);
FIG. 5 is a schematic cross-sectional view taken at C-C of FIG. 2 (showing the bulb flange ear plate mount);
in the figure: 1-an outer protective cylinder assembly; 2-a frame fixed on the head walking part of the radial stacker; 3-supporting the oil cylinder assembly; 4-a pin shaft; 5-an inner protective cylinder assembly; 6-a chassis assembly; 7-a baffle plate; 8-bolt; 11-an outer barrel; 12-an upper cover of the outer cylinder; 13-dust guard; 14-a bolt; 15-a nut; 16-double lip dust ring; 17-a bolt; 18-a nut; 31-supporting oil cylinders; 32-self-lubricating type spherical plain radial bearing; 33-a balancing valve; 51-bulb flange ear plate seat; 52-inner cylinder; 53-bolt; 61-a chassis; 62-ball head gland; 63-bolt; 111-a connection plate; 112-outer cylinder seamless steel tube; 113-rib plate I; 114-rib plate II; 115-outer cylinder guide sleeve; 116-outer barrel flange; 117-lifting lugs; 121-upper cover plate of outer cylinder; 122-a lifting lug; 123-upper cover ear plate; 124-rib plate; 511-bulb; 512-bulb flange; 513-connecting ear plates; 514-rib plate; 521-inner cylinder flange; 522-inner cylinder seamless steel tube; 611-ball seat; 612-a bottom plate; 613-footing nail; 614-lifting lug.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Description of the drawings: the supporting device for the radial stacker is used for supporting the head walking part in the radial stacker, and the head walking part correspondingly rotates according to the linear walking or fan-shaped distribution of the radial stacker.
The invention relates to a specific embodiment of a supporting device for a radial stacker, which comprises the following steps: as shown in fig. 1 to 5, the supporting device of the radial stacker includes an outer protection cylinder assembly 1, a supporting cylinder assembly 3, an inner protection cylinder assembly 5, a chassis assembly 6, and the like.
In this embodiment: the overall structure is as follows, an outer protection cylinder assembly 1 is arranged on a frame 2 fixed on a head walking part of a radial stacker; the bottom of the oil cylinder supporting the oil cylinder assembly 3 is hinged on an upper cover lug plate 123 of the outer protective cylinder assembly 1 through a pin shaft 4; the connecting lug plate 513 of the inner protective cylinder assembly 5 is hinged on the piston rod of the supporting oil cylinder assembly 3 through a pin shaft 4; the ball head base 611 of the chassis component 6 is hinged on the ball head of the inner protective barrel component 5. The support cylinder 31, the inner cylinder 52, the outer cylinder 11, the ball 511 and the ball base 611 are coaxial. The total height of the hydraulic support device is as small as possible at the same telescopic stroke of the hydraulic support device to reduce the space required for installation. The connecting plate of strutting arrangement and frame is last to be designed the tang in order to avoid connecting bolt to receive radial force, narrows down the tang in order to reduce the processingquantity under the condition that satisfies intensity simultaneously. The outer circular surface of the inner cylinder is a finish machining surface, and the inner cylinder is under the action of two guide matching surfaces of the outer cylinder no matter the supporting device is in a maximum extending state or a complete contracting state. After the inner cylinder is completely contracted, the inner cylinder, the balance valve and the rubber pipe connected with the balance valve can be avoided. The chassis is provided with the footing nails, so that the ground gripping capability is improved.
Wherein, outer protection section of thick bamboo subassembly 1 includes: the outer cylinder 11, the outer cylinder 11 is connected on the radial stacker head frame 2 by the bolt and the nut; the outer cylinder upper cover 12, the outer cylinder upper cover 12 is connected with a flange 116 at the upper end of the outer cylinder by a bolt 17 and a nut 18; a dust-proof plate 13, wherein the dust-proof plate 13 covers the opening at the upper end of the outer cylinder by a bolt 14 and a nut 15; a double lip wiper lip 16.
The outer cylinder is formed by welding an upper seamless steel pipe and a lower seamless steel pipe, and the inner side of the lower seamless steel pipe is processed into a circular guide matching surface; the outer diameters of the upper seamless steel pipe and the lower seamless steel pipe of the outer cylinder are the same, but the wall thickness of the lower seamless steel pipe is thicker, and the inner diameter of the outer cylinder is still smaller than that of the upper outer cylinder after the outer cylinder is processed into the guide sleeve. The lower seamless steel pipe has two guiding matching surfaces, and a section of non-guiding matching surface in the middle has a larger gap with the inner cylinder, so that the finish machining amount is reduced. A sealing cover is added for an opening of the balance valve, so that dust is prevented from entering the supporting device. Meanwhile, the balance valve and the rubber tube are convenient to assemble and disassemble.
Further, the outer cylinder 11 is a welded member, and includes: the connecting plate 111 is connected to the head frame 2 of the radial stacker by bolts and nuts; the outer cylinder seamless steel pipe 112 is welded with the connecting plate 111 through a rib plate I113 and a rib plate II 114, and an opening for installing the balance valve 33 and a rubber pipe penetrating through the balance valve are machined; the outer cylinder guide sleeve 115, the outer cylinder guide sleeve 115 is welded with the lower end of the seamless steel pipe 112; an outer cylinder flange 116, wherein the outer cylinder flange 116 is welded with the upper end of the seamless steel pipe 112; and the lifting lug 117 is welded on the outer side of the seamless steel pipe 112.
Furthermore, the connecting plate 111 is a steel plate, and the joint surface, the bolt connecting hole and the boss corresponding to the groove on the frame 2 are processed after welding, so that the seam allowance formed by the boss and the groove can prevent the connecting bolt from being subjected to shearing force. The outer cylinder guide sleeve 115 is a seamless steel pipe, and is welded to form an upper and a lower fitting surfaces and a middle non-fitting surface. The outer cylinder flange 116 is a circular ring for blanking a steel plate, and a binding surface, a bolt connecting hole and a groove corresponding to a boss of an upper cover of the outer cylinder are processed after welding, wherein the boss and the groove are matching surfaces.
The outer cylinder upper cover 12 is a welded part, including: an outer cylinder upper cover plate 121, wherein the outer cylinder upper cover plate 121 is a circular plate blanked by a steel plate, and a boss, a binding face and a bolt connecting hole matched with the outer cylinder are processed; the lifting lug 122 is formed by blanking a steel plate and welded at the center of the upper end; the lug plates 123 are blanked by steel plates and then are assembled and welded, and then pin shaft matching holes and fixing holes of pin shaft baffles are machined; rib 124.
The dust-proof plate 13 is a rubber plate or a metal plate, is provided with a hole for the rubber tube to pass through, and is fixed on the outer barrel through a bolt.
Wherein, support the oil cylinder assembly 3 and include: a support cylinder 31; the self-lubricating type radial spherical plain bearing 32, the self-lubricating type radial spherical plain bearing 32 is positioned at the upper and lower hinged points of the oil cylinder; the balance valve 33, the balance valve 33 is directly installed on the oil cylinder 31 and is positioned at the bottom of the oil cylinder; rubber tubes, joints and other accessories. The two ends of the oil cylinder are provided with self-lubricating type radial spherical plain bearings, so that the phenomenon that the service life of the oil cylinder is influenced by the fact that a piston rod and a cylinder barrel of the supporting oil cylinder are held hard due to machining errors of the inner protective barrel and the outer protective barrel is avoided; the balance valve is directly arranged on the supporting oil cylinder, and plays a role in safety protection.
Wherein, interior protection section of thick bamboo subassembly 5 includes: the ball head flange ear plate seat 51, the ear plate of the ball head flange ear plate seat 51 is hinged with the piston rod; the inner cylinder 52, the inner cylinder flange and the flange of the ball head flange ear plate seat are connected by a bolt 53.
Further, the ball flange ear plate seat 51 is a welded part, and is formed by welding the ball 511, the ball flange 512, the ear plate 513 and the rib plate 514. Bulb and flange in the bulb flange otic placode seat are welded structure, compare the very big reduction in manufacturing cost of traditional integral structure.
Furthermore, the ball 511 is made of quenched and tempered steel, and is subjected to quenching and tempering, turning and hard chromium plating on the surface. The ball flange 512 is made of a circular plate made of steel plate, and is provided with a boss, an abutting surface and a bolt connecting hole which are matched with the middle cylinder of the inner cylinder flange. The ear plate 513 is formed by blanking a steel plate, then welding the steel plate, and then machining a pin shaft matching hole and a fixing hole of the pin shaft baffle. The inner cylinder 52 is a welded part and is formed by welding an inner cylinder flange 521 and an inner cylinder seamless steel pipe 522 and then processing, and the outer circle of the inner cylinder is plated with hard chromium after finish machining. The inner barrel flange 521 is a circular steel plate and is formed by blanking a steel plate, and after the circular steel plate is welded with an inner barrel seamless steel pipe, a binding surface, a threaded hole in bolt connection with a ball head flange lug plate seat and a matching surface with a ball head flange lug plate seat boss are processed.
Wherein, chassis subassembly 6 includes: the chassis 61, the ball seat 611 of the chassis 61 is hinged with the ball 511 of the ball flange ear plate seat; the ball cover 62, the ball seat 611 and the ball cover 62 are connected by a bolt 63, and the ball 511 and the ball seat 611 are assembled together. Increase the footing nail and avoid skidding under the backup pad, increase the stability of support. The ball head support is universal and is split, the support plate is a circular, square or polygonal plate, and the size of the support plate can be flexibly selected according to the requirement of ground pressure during supporting.
Further, the base plate 61 is a welded part, and is assembled and welded by the ball seat 611, the bottom plate 612, the foot nail 613 and the lifting lug 614.
Furthermore, the ball seat 611 and the blank of the ball seat 611 are made of forged pieces or thick steel plates through blanking, the material is hardened and tempered steel, and the ball concave surface and the bolt fixing hole are machined after the hardening and tempering. And the bottom plate 612 are blanked by steel plates, positioning holes of the bottom pins are drilled, and then assembly welding is carried out. The bottom foot nail 613 is made of medium carbon steel and is formed by blanking round steel, quenching and tempering and then processing, then assembly welding is removed, and HF800 surfacing welding is used for the surface of the bottom foot nail after the assembly welding is finished to form a layer with the thickness of 5mm, so that the wear resistance is improved. The lifting lug 614 is formed by blanking steel plates and then is subjected to assembly welding. The ball head gland 62 is blanked by a steel plate, a spherical surface of a compression joint ball head and a threaded hole of a connecting bolt are processed, and the ball head gland is divided into two halves after the processing is finished, and the two halves are combined for use.
Wherein, the pin shaft 4 is provided with an excircle matching surface, a baffle ring groove and the like. A baffle 7 is arranged in a baffle circular groove to prevent the pin shaft 4 from moving, and the baffle is fixed on the lug plate by a bolt 8.
The oil supply loop of the supporting oil cylinders of the radial stacker is controlled by a piece of control valve, and one path of hydraulic oil simultaneously provides hydraulic oil for the two supporting oil cylinders which are symmetrically arranged left and right through two tee joints. For the suspension side with complex working conditions, uneven ground and deviation of the gravity center to the hydraulic station, the supporting oil cylinder can also control the head of the radial stacker to lift by one key (manually or automatically), so that the effect of self-adaptive adjustment is achieved.
Two control modes of the supporting device and a signal for completing the supporting are as follows: if the supporting action is manually controlled, the telescopic stroke of the inner cylinder of the supporting device is consistent with the telescopic stroke of the oil cylinder, and the supporting device does not act any more, namely, the supporting device reaches the limit stroke, which indicates that the supporting is finished. If the automatic control is adopted, the pressure of the hydraulic system can be used as a signal for controlling, and the system pressure detection reaches the system pressure, namely the limit stroke is reached at the moment, which indicates that the supporting process is finished.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The supporting device for the radial stacker comprises a supporting oil cylinder assembly, wherein the supporting oil cylinder assembly comprises a supporting oil cylinder, a bearing and a balance valve, and the supporting oil cylinder comprises a piston and an oil cylinder which are in sliding fit; the inner protection cylinder component and the outer protection cylinder component are mutually sleeved and are in sliding fit along axial direction, the inner protection cylinder component comprises an inner cylinder and a ball head flange ear plate seat arranged at the opening of the lower end of the inner cylinder, the outer protection cylinder component comprises an outer cylinder and an upper cover arranged at the upper end of the outer cylinder, the upper end of an oil cylinder is hinged with the upper cover through a pin shaft, the lower end of a piston rod of a piston is hinged with the ball head flange ear plate seat through a pin shaft, the lower end of the ball head flange ear plate seat is hinged with a chassis component through a ball head, and a connecting plate used for being connected with a head frame of a radial.
2. The supporting device for the radial stacker according to claim 1, wherein an outer cylinder flange is provided at an upper end of the outer cylinder, and the outer cylinder flange is connected with the upper cover through a bolt assembly; the lower end of the inner cylinder is provided with an inner cylinder flange, and the inner cylinder flange is connected with the ball head flange ear plate seat through a bolt component.
3. The supporting device for the radial stacker according to claim 2, wherein the upper portion of the outer cylinder has an opening for installing the balance valve, and the outer protection cylinder assembly further comprises a dust guard for covering the opening of the outer cylinder, and a double-lip dust guard provided between the outer cylinder and the inner cylinder.
4. The supporting device for the radial stacker as claimed in claim 3, wherein the outer cylinder comprises an upper section and a lower section welded to each other, the lower section is provided at an inner portion thereof with a guide groove extending in an axial direction, and the inner cylinder is provided at an outer portion thereof with a guide projection engaged with the guide groove in an axial direction.
5. The supporting device for the radial stacker according to any one of claims 2 to 4, wherein the ball flange ear plate seat further comprises a ball flange and a connecting ear plate connected to the upper portion of the ball flange, the ball flange is connected with the inner barrel flange through a bolt, the connecting ear plate is hinged to the lower end of the piston rod through a pin shaft, and the ball is fixed on the ball flange.
6. The support device for the radial stacker according to claim 5, wherein the base plate assembly comprises a base plate and a ball head cover, the base plate comprises a ball seat, the ball head is hinged in the ball groove, the ball seat is connected with the ball head cover through a bolt, and a footing nail is arranged at the lower part of the ball seat.
7. The supporting device for the radial stacker according to any one of claims 1 to 4, wherein the outer periphery of the pin shaft is provided with a circular groove, and a baffle is arranged in the circular groove to prevent the pin shaft from moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833825.XU CN210339226U (en) | 2019-06-04 | 2019-06-04 | Supporting device for radial stacker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833825.XU CN210339226U (en) | 2019-06-04 | 2019-06-04 | Supporting device for radial stacker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210339226U true CN210339226U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920833825.XU Expired - Fee Related CN210339226U (en) | 2019-06-04 | 2019-06-04 | Supporting device for radial stacker |
Country Status (1)
| Country | Link |
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| CN (1) | CN210339226U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065764A (en) * | 2019-06-04 | 2019-07-30 | 鹤壁汽车工程职业学院 | A kind of radial direction stacker and its support device |
-
2019
- 2019-06-04 CN CN201920833825.XU patent/CN210339226U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065764A (en) * | 2019-06-04 | 2019-07-30 | 鹤壁汽车工程职业学院 | A kind of radial direction stacker and its support device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |