Foam ceramic automatic dust-free cloth unloading production line

Abstract

This invention discloses an automated dust-free foam ceramic feeding and unloading production line. After firing in the kiln, the kiln car moves along the conveyor track, sequentially passing through a first loading and unloading area, a first feeder, a second loading and unloading area, a second feeder, and a third loading and unloading area. Each of these areas is equipped with a panel loading and unloading robot and a panel unloading robot. The panel loading and unloading robot removes the panels from the kiln car, facilitating the removal of the fired foam ceramic by the panel unloading robot. After removing the foam ceramic, the panel loading and unloading robot repositions the panels onto the kiln car, and then the first and second feeders re-feed the panels. The kiln car, after feeding, enters the next kiln, achieving continuous firing of foam ceramic. Furthermore, since the kiln car has at least three layers of kiln furniture stacked on it, a kiln furniture unloading robot is installed above the conveyor track to facilitate unstacking. This achieves automated assembly and disassembly of the panels and automated handling of ceramics, resulting in a high degree of automation, significantly reducing labor costs, and improving both production efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to an automatic dust-free foam ceramic cloth unloading production line. Background Art

[0002] Foam ceramic material is a porous material with high temperature characteristics. It has the excellent properties of low thermal conductivity, light weight and high hardness. However, it currently lacks advanced large-scale continuous automated production equipment, has low production efficiency, and is difficult to guarantee product quality. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an automatic dust-free cloth unloading production line for foam ceramics, wherein the kiln car moves along the conveying track, passing through the first loading and unloading area, the first distributor, the second loading and unloading area, the second distributor, and the third loading and unloading area in sequence, and a longitudinal slide is installed above the conveying track, and the longitudinal slide is located on the same axis as the conveying track, and a kiln unloading robot is slidably installed on the longitudinal slide, and the kiln unloading robot reciprocates above the first loading and unloading area, the first distribution area, the second loading and unloading area, and the second distribution area, and the first loading and unloading area, the second loading and unloading area, and the second loading and unloading area are all equipped with a board unloading robot, a panel loading and unloading robot, and a transverse slide, and the transverse slide is mounted across the conveying track, and the axis of the transverse slide is perpendicular to the axis of the conveying track, and the board unloading robot and the panel loading and unloading robot are slidably mounted on the transverse slide.

[0004] According to some embodiments of the present invention, the kiln furniture unloading robot includes an unloading mobile frame, a gripper disc frame, and a gripper frame. The unloading mobile frame is slidably mounted on the longitudinal moving slide; the gripper disc frame is equipped with a clamping reduction motor, the clamping reduction motor is equipped with a swing arm shaft, the swing arm shaft is connected to a swing arm, and pull rods are respectively mounted at both ends of the swing arm, and the pull rods are connected to the gripper frame.

[0005] According to some embodiments of the present invention, the unloading and loading mobile frame is equipped with a first lifting motor, the first lifting motor is equipped with a first lifting shaft, the end of the first lifting shaft is equipped with a first double sprocket, the first double sprocket is equipped with a first driving chain, one end of the first driving chain is equipped with a first double-position connector, the first lifting chain and the first driven chain are respectively equipped with the first double-position connector, the first lifting chain is turned downward through the first steering sprocket and connected to the gripper disc frame; the first driven chain is wound with a second steering sprocket, the first driven chain is equipped with a second double-position connector, the second double-position connector is respectively connected to the second lifting chain and the other end of the first driving chain, the second lifting chain is turned downward through the third steering sprocket and connected to the gripper disc frame.

[0006] According to some embodiments of the present invention, the plate unloading robot includes a plate unloading moving frame, a gripper frame, and a gripper group. The plate unloading moving frame is slidably mounted on the transverse slide, and the gripper group is installed at the bottom of the gripper frame. The gripper group includes two grippers, a cylinder pull rod is installed between the two grippers, and a slide rail slider assembly is installed between the two grippers and the bottom of the gripper frame.

[0007] According to some embodiments of the present invention, a second lifting motor is installed on the unloading plate moving frame, a second lifting shaft is installed on the second lifting motor, a second double sprocket is installed on the end of the second lifting shaft, a second driving chain is installed on the second double sprocket, one end of the second driving chain is equipped with a third double-position connector, a third lifting chain and a second driven chain are respectively installed on the third double-position connector, the third lifting chain is turned downward through a fourth steering sprocket and connected to the gripper frame; a fifth steering sprocket is installed around the second driven chain, a fourth double-position connector is installed on the second driven chain, the fourth double-position connector is respectively connected to the fourth lifting chain and the other end of the second driving chain, the fourth lifting chain is turned downward through a sixth steering sprocket and connected to the gripper frame.

[0008] According to some embodiments of the present invention, the enclosure loading and unloading robot includes an enclosure loading and unloading frame, a clamping frame, a clamping rod, and a pneumatic clamping arm. The enclosure loading and unloading frame is slidably mounted on the transverse slide, and the pneumatic clamping arm is arranged and mounted on the clamping rod. The clamping rod includes two long clamping rods and two short clamping rods. The two long clamping rods are respectively movably mounted on the outer sides of the long sides of the clamping frame, and the two short clamping rods are respectively movably mounted on the outer sides of the wide sides of the clamping frame.

[0009] According to some embodiments of the present invention, two transverse main shafts are installed between the two long clamping rods, the two transverse main shafts are equipped with first synchronous pulleys, and the first synchronous belt is installed between the two first synchronous pulleys; a first servo reduction motor is installed on one of the transverse main shafts; the ends of the two transverse main shafts are threadedly connected with a first nut seat, and the first nut seat is fixed on the long clamping rod.

[0010] According to some embodiments of the present invention, two longitudinal main shafts are installed between the two short clamping rods, second synchronous pulleys are installed on the two longitudinal main shafts, and a second synchronous belt is installed between the two second synchronous pulleys; a second servo reduction motor is installed on one of the longitudinal main shafts; the ends of the two longitudinal main shafts are threadedly connected with second nut seats, and the second nut seats are fixed on the short clamping rods.

[0011] According to some embodiments of the present invention, two lifting columns are installed on the gripping frame, and two lifting seats are installed at the bottom of the enclosure loading and unloading frame, and the two lifting seats are respectively mounted on the two lifting columns, and a double-row sprocket is rotated in the lifting seat, and a lifting reduction motor is installed on the enclosure loading and unloading frame, and a lifting shaft is installed on the lifting reduction motor, and both ends of the lifting shaft are connected with the double-row sprockets, and a double-row chain is installed on the double-row sprocket, and the two ends of the double-row chain are respectively fixed to the lifting columns; two tensioning double-row sprockets are installed in the lifting seat, and the double-row sprocket is located between the two tensioning double-row sprockets, and the two tensioning double-row sprockets are located on the outside of the chain.

[0012] An automatic dust-free foam ceramic cloth unloading production line according to an embodiment of the present invention has at least the following beneficial effects:

[0013] After the kiln car completes firing in the kiln, it moves along the conveying track, passing through the first loading and unloading area, the first distributor, the second loading and unloading area, the second distributor, and the third loading and unloading area in sequence. The first loading and unloading area, the second loading and unloading area, and the third loading and unloading area are equipped with a panel loading and unloading robot and a panel unloading robot. The panel loading and unloading robot removes the panels of the kiln furniture on the kiln car, which is convenient for the panel unloading robot to take out the fired foam ceramics. After taking out the foam ceramics, the panel loading and unloading robot puts the panels back on the kiln car, and then distributes the panels again through the first distributor and the second distributor. After the distribution is completed, the kiln car enters the next kiln furnace to realize continuous firing of foam ceramics; secondly, there are at least three layers of kiln furniture stacked on the kiln car. In order to facilitate destacking, a kiln furniture unloading robot is installed above the conveying track to realize automatic assembly and disassembly of panels and automatic handling of ceramics. The degree of automation is high, which greatly reduces the labor force, and improves production efficiency and production quality.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention;

[0017] Figure 2 It is a three-dimensional schematic diagram of a kiln furniture unloading and loading robot according to an embodiment of the present invention;

[0018] Figure 3 It is a bottom perspective schematic diagram of a kiln furniture unloading robot according to an embodiment of the present invention;

[0019] Figure 4It is a side view schematic diagram of a kiln furniture unloading robot according to an embodiment of the present invention;

[0020] Figure 5 It is a three-dimensional schematic diagram of a plate unloading robot according to an embodiment of the present invention;

[0021] Figure 6 A schematic side view of a plate unloading robot according to an embodiment of the present invention;

[0022] Figure 7 It is a three-dimensional schematic diagram of a panel loading and unloading robot according to an embodiment of the present invention;

[0023] Figure 8 It is a schematic diagram of the connection between the gripping frame and the panel loading and unloading frame according to an embodiment of the present invention;

[0024] Fig. 9 This is a schematic diagram of the bottom of the enclosure loading and unloading robot according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Reference Figure 1 A foam ceramic automatic dust-free cloth unloading production line, a kiln car 101 moves along a conveying track 102, passes through a first loading and unloading area 103, a first distributor 104, a second loading and unloading area 105, a second distributor 106, and a third loading and unloading area 107 in sequence, a longitudinal slide 108 is installed above the conveying track 102, the longitudinal slide 108 and the conveying track 102 are located on the same axis, a kiln unloading robot 100 is slidably installed on the longitudinal slide 108, and the kiln unloading robot 100 is in the first loading and unloading area 103, the first material distribution area, the second loading and unloading area 105, and the second material distribution area reciprocate above; the first loading and unloading area 103, the second loading and unloading area 105, and the second loading and unloading area 105 are all equipped with a plate unloading robot 200, a panel loading and unloading robot 300, and a transverse slide 109; the transverse slide 109 is mounted astride the conveying track 102, and the axis of the transverse slide 109 is perpendicular to the axis of the conveying track 102; the plate unloading robot 200 and the panel loading and unloading robot 300 are slidably mounted on the transverse slide 109.

[0027] During operation, after the kiln car 101 has completed firing in the kiln furnace, it moves along the conveying track 102, and passes through the first loading and unloading area 103, the first distributor 104, the second loading and unloading area 105, the second distributor 106, and the third loading and unloading area 107 in sequence. The first loading and unloading area 103, the second loading and unloading area 105, and the third loading and unloading area 107 are equipped with a panel loading and unloading robot 300 and a panel unloading robot 200. The panel loading and unloading robot 300 disassembles the panel of the kiln furniture on the kiln car 101, so that the panel unloading robot 200 can take out the fired foam ceramics. After taking out the foam ceramics, The enclosure loading and unloading robot 300 places the enclosure back on the kiln car 101, and then distributes the material into the enclosure through the first distributor 104 and the second distributor 106. After the distribution, the kiln car 101 enters the next kiln to achieve continuous firing of foam ceramics; secondly, there are at least three layers of kiln furniture stacked on the kiln car 101. In order to facilitate destacking, a kiln furniture unloading robot 100 is installed above the conveying track 102, which realizes automatic assembly and disassembly of enclosures and automatic transportation of ceramics. It has a high degree of automation, greatly reduces labor, and improves production efficiency and production quality.

[0028] Reference Figures 2 to 4 As shown, the kiln furniture unloading robot 100 includes an unloading mobile frame 110, a gripper frame 120, and a gripper frame 130. The unloading mobile frame 110 is slidably mounted on the longitudinal sliding frame 108; the gripper frame 120 is equipped with a clamping reduction motor 121, and a swing arm shaft 122 is mounted on the clamping reduction motor 121. The swing arm shaft 122 is connected to a swing arm 123. Pull rods 124 are respectively mounted at both ends of the swing arm 123, and the pull rods 124 are connected to the gripper frame 130. The clamping reduction motor 121 drives the swing arm 123 to rotate through the swing arm shaft 122, so that the pull rod 124 pulls the gripper frame 130 inward to complete the grabbing of the kiln furniture.

[0029] In order to facilitate the lifting of the gripper frame 130, the unloading and loading moving frame 110 is equipped with a first lifting motor 111, the first lifting motor 111 is equipped with a first lifting shaft 112, the end of the first lifting shaft 112 is equipped with a first double sprocket 113, the first double sprocket 113 is equipped with a first driving chain 114, one end of the first driving chain 114 is equipped with a first double-position connector 115, the first double-position connector is respectively equipped with a first lifting chain 116, a first driven chain 117, and the first lifting chain 118. A lifting chain 116 is turned downward through a first steering sprocket 118 and connected to a gripper disc frame 120; a second steering sprocket 119 is wound around the first driven chain 117, and a second double-position connector 1200 is installed on the first driven chain 117, and the second double-position connector 1200 is respectively connected to a second lifting chain 1300 and the other end of the first active chain 114, and the second lifting chain 1300 is turned downward through a third steering sprocket 1400 and connected to the gripper disc frame 120.

[0030] Reference Figure 5, 6 As shown, the plate unloading robot 200 includes a plate unloading moving frame 210, a gripper frame 220, and a gripper group 230. The plate unloading moving frame 210 is slidably mounted on the transverse slide 109, and the gripper group 230 is installed at the bottom of the gripper frame 220. The gripper group 230 includes two grippers 231, and a cylinder pull rod 232 is installed between the two grippers 231. A slide rail slider assembly 233 is installed between the two grippers 231 and the bottom of the gripper frame 220. The gripper 231 on one side is pushed or pulled by the cylinder pull rod 232 to realize the gripping and transportation of foam ceramics.

[0031] In order to move the gripper frame 220 downward, a second lifting motor 211 is installed on the unloading plate moving frame 210, and a second lifting shaft 212 is installed on the second lifting motor 211. A second double sprocket 213 is installed at the end of the second lifting shaft 212. A second driving chain 214 is installed on the second double sprocket 213. A third double-position connector 215 is installed at one end of the second driving chain 214. A third lifting chain 216 and a second driven chain 217 are installed on the first third double-position connector 215. The third lifting chain 216 is turned downward through the fourth steering sprocket 218 and connected to the gripper frame 220; the fifth steering sprocket 219 is wound around the second driven chain 217, and the fourth double-position connector 2200 is installed on the second driven chain 217, and the fourth double-position connector 2200 is respectively connected to the fourth lifting chain 2300 and the other end of the second active chain 214, and the fourth lifting chain 2300 is turned downward through the sixth steering sprocket 2400 and connected to the gripper frame 220.

[0032] Reference Figures 7 to 9 As shown, the enclosure loading and unloading robot 300 includes an enclosure loading and unloading frame 310, a gripper frame 320, a gripper rod 330, and a pneumatic gripper 340. The enclosure loading and unloading frame 310 is slidably mounted on the transverse slide 109, and the pneumatic gripper 340 is arranged and mounted on the gripper rod 330. The gripper rod 330 includes two long gripper rods 331 and two short gripper rods 332. The two long gripper rods 331 are movably mounted on the outer side of the long side of the gripper frame 320, and the two short gripper rods 332 are movably mounted on the outer side of the wide side of the gripper frame 320, and the convex ribs on the outer side of the enclosure are clamped by the pneumatic gripper 340.

[0033] Two transverse main shafts 333 are installed between the two long clamping rods 331, and the two transverse main shafts 333 are equipped with first synchronous pulleys 350, and the first synchronous belt 360 is installed between the two first synchronous pulleys 350; one of the transverse main shafts 333 is equipped with a first servo reduction motor 341; the ends of the two transverse main shafts 333 are threadedly connected with a first nut seat 370, and the first nut seat 370 is fixed on the long clamping rod 331. The two transverse main shafts 333 are rotated by the first servo reduction motor 341, so that the first nut seat 370 moves at the end of the transverse main shaft 333, thereby realizing the outward or inward movement of the long clamping rod 331.

[0034] Two longitudinal main shafts 380 are installed between the two short clamping rods 332, and second synchronous pulleys 381 are installed on the two longitudinal main shafts 380, and a second synchronous belt 382 is installed between the two second synchronous pulleys 381; a second servo reduction motor 390 is installed on one of the longitudinal main shafts 380; the ends of the two longitudinal main shafts 380 are threadedly connected with second nut seats 3100, and the second nut seats 3100 are fixed on the short clamping rods 332; the two longitudinal main shafts 380 are rotated by the second servo reduction motor 390, so that the second nut seats 3100 move at the ends of the longitudinal main shafts 380, thereby realizing the outward or inward movement of the longitudinal clamping rods 330.

[0035] In order to move the gripping frame 320 downward, two lifting columns 321 are installed on the gripping frame 320, and two lifting machine seats 311 are installed at the bottom of the panel loading and unloading frame 310. The two lifting machine seats 311 are respectively mounted on the two lifting columns 321. A double-row sprocket 312 is rotated in the lifting machine seat 311. A lifting reduction motor 313 is installed on the panel loading and unloading frame 310. A lifting shaft 314 is installed on the lifting reduction motor 313. Both ends of the lifting shaft 314 are connected to the double-row sprocket 312. A double-row chain 315 is installed on the double-row sprocket 312. Both ends of the double-row chain 315 are respectively fixed on the lifting columns 321; two tensioning double-row sprockets 316 are installed in the lifting machine seat 311. The double-row sprocket 312 is located between the two tensioning double-row sprockets 316, and the two tensioning double-row sprockets 316 are located on the outside of the chain.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A foam ceramic automatic dust-free cloth unloading production line, characterized in that: The kiln car (101) moves along the conveying track (102), passing through the first loading and unloading area (103), the first distributor (104), the second loading and unloading area (105), the second distributor (106), and the third loading and unloading area (107) in sequence. A longitudinal sliding carriage (108) is installed above the conveying track (102). The longitudinal sliding carriage (108) and the conveying track (102) are located on the same axis. A kiln furniture unloading robot (100) is slidably installed on the longitudinal sliding carriage (108). The kiln furniture unloading robot (100) is moved between the first loading and unloading area (103), the second loading and unloading area (105), the second distributor (106), and the third loading and unloading area (107). A material distribution area, a second loading and unloading area (105), and a reciprocating movement above the second material distribution area. The first loading and unloading area (103) and the second loading and unloading area (105) are both equipped with a plate unloading robot (200), a panel loading and unloading robot (300), and a transverse sliding carriage (109). The transverse sliding carriage (109) is mounted across the top of the conveying track (102). The axis of the transverse sliding carriage (109) is perpendicular to the axis of the conveying track (102). The plate unloading robot (200) and the panel loading and unloading robot (300) are slidably mounted on the transverse sliding carriage (109); The panel loading and unloading robot (300) comprises a panel loading and unloading frame (310), a gripping frame (320), a gripping rod (330), and a pneumatic gripping rod (340); the panel loading and unloading frame (310) is slidably mounted on the transverse slide (109); the pneumatic gripping rod (340) is arranged and mounted on the gripping rod (330); the gripping rod (330) comprises two long gripping rods (331) and two short gripping rods (332); the two long gripping rods (331) are movably mounted on the outer sides of the long sides of the gripping frame (320); and the two short gripping rods (332) are movably mounted on the outer sides of the wide sides of the gripping frame (320); Two transverse main shafts (333) are arranged between the two long clamping handle bars (331), and first synchronous pulleys (350) are arranged on the two transverse main shafts (333), and a first synchronous belt (360) is arranged between the two first synchronous pulleys (350); a first servo reduction motor (341) is arranged on one of the transverse main shafts (333); the ends of the two transverse main shafts (333) are threadedly connected with first nut seats (370), and the first nut seats (370) are fixed on the long clamping handle bars (331); the two transverse main shafts (333) are rotated by the first servo reduction motor (341), so that the first nut seats (370) move at the ends of the transverse main shafts (333), so that the long clamping handle bars (331) move outward or inward; Two longitudinal main shafts (380) are arranged between the two short gripping rods (332); second synchronous pulleys (381) are arranged on the two longitudinal main shafts (380); a second synchronous belt (382) is arranged between the two second synchronous pulleys (381); a second servo reduction motor (390) is arranged on one of the longitudinal main shafts (380); the ends of the two longitudinal main shafts (380) are threadedly connected with second nut seats (3100); the second nut seats (3100) are fixed on the short gripping rods (332); the two longitudinal main shafts (380) are rotated by the second servo reduction motor (390), so that the second nut seats (3100) move at the ends of the longitudinal main shafts (380), so that the longitudinal gripping rods (330) move outward or inward.

2. The foam ceramic automatic dust-free cloth unloading production line according to claim 1 is characterized in that: The kiln furniture unloading robot (100) comprises an unloading movable frame (110), a gripper frame (120), and a gripper frame (130); the unloading movable frame (110) is slidably mounted on the longitudinal sliding frame (108); the gripper frame (120) is mounted with a clamping reduction motor (121); the clamping reduction motor (121) is mounted with a swing arm shaft (122); the swing arm shaft (122) is connected to a swing arm (123); pull rods (124) are respectively mounted at both ends of the swing arm (123); the pull rods (124) are connected to the gripper frame (130).

3. The foam ceramic automatic dust-free cloth unloading production line according to claim 2 is characterized in that: The loading and unloading moving frame (110) is equipped with a first lifting motor (111), the first lifting motor (111) is equipped with a first lifting shaft (112), the end of the first lifting shaft (112) is equipped with a first double-linked sprocket (113), the first double-linked sprocket (113) is equipped with a first driving chain (114), one end of the first driving chain (114) is equipped with a first double-position connector (115), the first double-position connector (115) is respectively equipped with a first lifting chain (116) and a first driven chain (117), the first lifting chain (116) and the first driven chain (117) are respectively equipped with The first driven chain (117) is wound with a second steering sprocket (119), and the first driven chain (117) is provided with a second double-position connector (1200), and the second double-position connector (1200) is respectively connected to a second lifting chain (1300) and the other end of the first driving chain (114), and the second lifting chain (1300) is downwardly turned through a third steering sprocket (1400) and connected to the gripper disc frame (120).

4. The foam ceramic automatic dust-free cloth unloading production line according to claim 1 is characterized in that: The plate unloading robot (200) comprises a plate unloading moving frame (210), a gripper frame (220), and a gripper group (230). The plate unloading moving frame (210) is slidably mounted on the transverse sliding frame (109). The gripper group (230) is installed at the bottom of the gripper frame (220). The gripper group (230) comprises two grippers (231). A cylinder pull rod (232) is installed between the two grippers (231). A slide rail slider assembly (233) is installed between the two grippers (231) and the bottom of the gripper frame (220).

5. The foam ceramic automatic dust-free cloth unloading production line according to claim 4 is characterized in that: The unloading plate moving frame (210) is provided with a second lifting motor (211), the second lifting motor (211) is provided with a second lifting shaft (212), the end of the second lifting shaft (212) is provided with a second double-linked sprocket (213), the second double-linked sprocket (213) is provided with a second driving chain (214), one end of the second driving chain (214) is provided with a third double-position connector (215), the third double-position connector (215) is provided with a third lifting chain (216) and a second driven chain (217), the third lifting chain (216) is turned downwardly through a fourth steering sprocket (218) and connected to the gripper frame (220); a fifth steering sprocket (219) is wound around the second driven chain (217), a fourth double-position connector (2200) is installed on the second driven chain (217), the fourth double-position connector (2200) is respectively connected to a fourth lifting chain (2300) and the other end of the second active chain (214), the fourth lifting chain (2300) is turned downwardly through a sixth steering sprocket (2400) and connected to the gripper frame (220).

6. The foam ceramic automatic dust-free cloth unloading production line according to claim 1 is characterized in that: The gripping frame (320) is provided with two lifting columns (321), the bottom of the panel loading and unloading frame (310) is provided with two lifting seats (311), the two lifting seats (311) are respectively mounted on the two lifting columns (321), a double-row sprocket (312) is rotatably mounted in the lifting seats (311), a lifting reduction motor (313) is provided on the panel loading and unloading frame (310), and a lifting shaft (314) is provided on the lifting reduction motor (313). ), both ends of the lifting shaft (314) are connected to the double-row sprocket (312), a double-row chain (315) is mounted on the double-row sprocket (312), and both ends of the double-row chain (315) are respectively fixed to the lifting column (321); two tensioning double-row sprockets (316) are mounted in the lifting machine base (311), the double-row sprocket (312) is located between the two tensioning double-row sprockets (316), and the two tensioning double-row sprockets (316) are located outside the chain.

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