A conveying device for processing liquid crystal display modules

Abstract

The present invention relates to the technical field of liquid crystal display screen processing and transfer equipment, and specifically to a conveying equipment for processing liquid crystal display modules, comprising a conveyor belt, a transport boat is arranged on the conveyor belt, a limiting mechanism is arranged on the transport boat, the limiting mechanism comprises a groove, a plurality of grooves are arranged on the transport boat, a telescopic column is slidably connected in the groove, the lower end surface of the telescopic column is fixedly connected to the bottom of the groove through a supporting spring, a rubber suction cup is fixedly connected to the upper end surface of the telescopic column, an adsorption mechanism is arranged in the telescopic column, and a suction mechanism is arranged on the adsorption mechanism. The present invention compresses the telescopic column into the groove by using the weight of the liquid crystal display module itself, so that the telescopic columns around the liquid crystal display module have a limiting effect on the liquid crystal display module, and through the cooperation between the suction mechanism and the adsorption mechanism, the rubber suction cup has an adsorption effect on the glass surface of the liquid crystal display module, so as to prevent the liquid crystal display module from sliding and causing damage during transportation.

Description

Technical Field

[0001] The invention relates to the technical field of liquid crystal display screen processing and transfer equipment, in particular to a liquid crystal display module processing conveying equipment. Background Art

[0002] Liquid crystal display module is referred to as LCM, which is the entire component of the liquid crystal display without the casing, including the backlight composed of the backplane, LED lights, reflective film, LGP, upper and lower diffusion films, and brightening film, namely B / L. During the processing, it is assembled into an open-cell composed of a glass substrate, PCB board and liquid crystal, and then combined with the casing, backlight power supply and open-cell's LVDS signal to form a complete LCD display.

[0003] The processing and assembly of LCD displays are generally carried out on an assembly line, where the LCD modules are placed on the assembly line and transferred to different assembly areas. However, traditional assembly lines do not have a mechanism to fix the LCD modules. During operation, the LCD modules without outer casing protection are very prone to collision and damage. At the same time, the surface of the LCD modules is made of smooth fiberglass material, which is easy to slip during transportation, causing scratches on the display area.

[0004] In view of this, the present invention proposes a conveying device for processing liquid crystal display modules to solve the above technical problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] A conveying device for processing liquid crystal display modules includes a conveyor belt, a transport boat is arranged on the conveyor belt, a limiting mechanism is arranged on the transport boat, the limiting mechanism includes a groove, a plurality of the grooves are opened on the transport boat, a telescopic column is slidably connected in the groove, the lower end surface of the telescopic column is fixedly connected to the bottom of the groove through a supporting spring, the upper end of the telescopic column extends out of the groove, the upper end surface of the telescopic column is fixedly connected to a rubber suction cup, and an adsorption mechanism is arranged in the telescopic column.

[0007] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, cylinders are arranged on both sides of the conveyor belt, and baffles are fixedly connected to the output shafts of the cylinders, and the baffles abut against one side of the transport boat.

[0008] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, the adsorption mechanism includes an air channel, the air channel is opened in the telescopic column, the air channel is connected to the rubber suction cup, the lower end of the air channel is fixedly connected to a hose, the hose is arranged in the groove, and the hose is fixedly connected to the air guide tube.

[0009] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, a suction mechanism is provided at one end of the airway, and the suction mechanism includes a rack, and the rack is fixedly connected to the inner side of the conveyor belt, and the rack is distributed on both sides of the transport boat, and the rack is meshed with a gear, and the gear is rotatably installed on the side of the transport boat, and the upper end face of the gear is fixedly connected to a cam, and the cam abuts against the arc block.

[0010] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, the arc block is fixedly connected to the push rod on one side away from the cam, the push rod extends to the interior of the piston tube at one end away from the cam and is fixedly connected to the piston, and the piston is slidably connected to the inner wall of the piston tube.

[0011] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, a return spring is embedded in the push rod, one end of the return spring abuts against the arc block, and the other end of the return spring abuts against the upper end surface of the piston tube.

[0012] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, a lifting mechanism is arranged under the transport boat, and the lifting mechanism includes an electric push rod, and the electric push rod is fixed to the conveyor belt through a bracket, and the output end of the electric push rod is fixedly connected to a horizontal plate, and a plurality of T-shaped rods are fixedly connected to the horizontal plate, and the T-shaped rods correspond to the gaps on the transport boat one by one.

[0013] As a preferred solution of the conveying equipment for processing liquid crystal display modules provided by the present invention, a transplanting mechanism is arranged above the transport boat, and the transplanting mechanism includes a slide rail, and the slide rail is arranged above the conveyor belt. A walking assembly is arranged on the slide rail, and the lower end of the walking assembly is fixedly connected to an electric lifting rod, and the lower end of the electric lifting rod is fixedly connected to a pallet.

[0014] Beneficial effects of the present invention:

[0015] (1) In the present invention, the weight of the liquid crystal display module is used to press the telescopic columns downward, so that the telescopic columns are compressed into the grooves. The height of the telescopic columns that are not pressed remains unchanged. Therefore, the telescopic columns around the liquid crystal display module have a limiting effect on the liquid crystal display module, preventing the liquid crystal display module from sliding around during transportation and causing collision damage.

[0016] (2) In the present invention, the ductility of the rubber suction cup is utilized to increase the contact area between the glass surface of the liquid crystal display module and the rubber suction cup, and the friction force is increased, thereby further improving the limiting effect on the liquid crystal display module. At the same time, the soft rubber suction cup can prevent the glass surface of the liquid crystal display module from being scratched.

[0017] (3) In the present invention, the suction mechanism and the adsorption mechanism cooperate to enable the rubber suction cup to have an adsorption effect on the glass surface of the liquid crystal display module, thereby increasing the friction force and further limiting the position of the liquid crystal display module to prevent the liquid crystal display module from sliding and causing damage during transportation.

[0018] (4) In the present invention, by using the cooperation between the lifting mechanism and the transfer mechanism, the liquid crystal display module in the transport boat on the conveyor belt can be moved to other conveyor belts, thereby achieving the function of multi-directional transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] in:

[0021] Figure 1 It is a schematic diagram of the overall structure of a conveying device for processing a liquid crystal display module;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0024] Figure 4 A schematic diagram of the connection structure of a suction mechanism and an adsorption mechanism in a conveying device for processing a liquid crystal display module;

[0025] Figure 5 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0026] Figure 6 for Figure 5 A magnified schematic diagram of the structure at D in the middle;

[0027] Figure 7 for Figure 6 The enlarged schematic diagram of the structure at E in the middle;

[0028] Figure 8It is a schematic diagram of the connection structure of the lifting mechanism and the transplanting mechanism in a conveying device for processing a liquid crystal display module;

[0029] Fig. 9 A schematic diagram of the connection structure of a suction mechanism, a transport boat and an adsorption mechanism in a conveying device for processing a liquid crystal display module;

[0030] Fig.10 for Fig. 9 The enlarged schematic diagram of the structure at F in the middle;

[0031] Fig.11 for Fig.10 Enlarged comparison of the structures at G and H in the middle;

[0032] In the figure:

[0033] 1. Conveyor belt; 2. Transport boat; 3. Cylinder; 4. Baffle;

[0034] 5. Limiting mechanism; 51. Telescopic column; 52. Rubber suction cup; 53. Groove; 54. Support spring;

[0035] 6. Suction mechanism; 61. Rack; 62. Gear; 63. Cam; 64. Arc block; 65. Return spring; 66. Push rod; 67. Piston tube; 68. Piston;

[0036] 7. adsorption mechanism; 71. airway; 72. hose; 73. airway;

[0037] 8. Lifting mechanism; 81. Electric push rod; 82. Horizontal plate; 83. T-shaped rod;

[0038] 9. Transplanting mechanism; 91. Slide rail; 92. Traveling assembly; 93. Electric lifting rod; 94. Pallet. DETAILED DESCRIPTION

[0039] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example

[0041] like Figure 1-Figure 6As shown, a conveying device for processing liquid crystal display modules includes a conveyor belt 1, a transport boat 2 is arranged on the conveyor belt 1, a limiting mechanism 5 is arranged on the transport boat 2, the limiting mechanism 5 includes a groove 53, a plurality of the grooves 53 are opened on the transport boat 2, a telescopic column 51 is slidably connected in the groove 53, the lower end surface of the telescopic column 51 is fixedly connected to the bottom of the groove 53 through a supporting spring 54, the upper end of the telescopic column 51 extends out of the groove 53, the upper end surface of the telescopic column 51 is fixedly connected to a rubber suction cup 52, and an adsorption mechanism 7 is arranged in the telescopic column 51.

[0042] In the embodiment, the user places the glass surface of the LCD module on the transport boat 2, and the weight of the LCD module itself presses the telescopic column 51 downward, and the telescopic column 51 compresses the supporting spring 54, and at the same time the telescopic column 51 retracts into the groove 53. At this time, the part of the telescopic column 51 pressed by the LCD module is retracted into the groove 53, and the height of the telescopic column 51 that is not pressed remains unchanged. Therefore, the telescopic columns 51 around the LCD module have a limiting effect on the LCD module to prevent the LCD module from sliding around during transportation and causing collision damage. At the same time, the glass surface of the LCD module contacts the rubber suction cup 52. Because the rubber suction cup 52 is ductile, the contact area between the glass surface of the LCD module and the rubber suction cup 52 is increased, and the friction force is increased, which further improves the limiting effect of the LCD module. At the same time, the soft rubber suction cup 52 can prevent the glass surface of the LCD module from being scratched.

[0043] like Figure 1 and Figure 2 As shown, cylinders 3 are provided on both sides of the conveyor belt 1 , and a baffle 4 is fixedly connected to the output shaft of the cylinder 3 , and the baffle 4 abuts against one side of the transport boat 2 .

[0044] In the embodiment, after the cylinder 3 is started, it drives the baffle 4 to extend. After the baffles 4 on both sides of the conveyor belt 1 are extended, they can block the transport boat 2 from continuing to move. The transport boat 2 and the driving wheel in the conveyor belt 1 below are movably connected.

[0045] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 and Fig.11 As shown, the adsorption mechanism 7 includes an air channel 73, the air channel 73 is opened in the telescopic column 51, the air channel 73 is connected to the rubber suction cup 52, the lower end of the air channel 73 is fixedly connected to the hose 72, the hose 72 is arranged in the groove 53, and the hose 72 is fixedly connected to the air guide pipe 71;

[0046] A suction mechanism 6 is provided at one end of the air passage 73, and the suction mechanism 6 includes a rack 61, and the rack 61 is fixedly connected to the inner side of the conveyor belt 1, and the rack 61 is distributed on both sides of the transport boat 2, and the rack 61 is meshed with a gear 62, and the gear 62 is rotatably mounted on the side of the transport boat 2, and the upper end surface of the gear 62 is fixedly connected with a cam 63, and the cam 63 is in contact with an arc block 64;

[0047] The arc block 64 is fixedly connected to a push rod 66 at one side away from the cam 63, and one end of the push rod 66 away from the cam 63 extends to the inside of a piston tube 67 and is fixedly connected to a piston 68. The piston 68 is slidably connected to the inner wall of the piston tube 67. An air intake pipe 69 is provided at the bottom of the piston tube 67, and a one-way valve is provided in the air intake pipe 69.

[0048] A return spring 65 is embedded in the push rod 66, one end of the return spring 65 abuts against the arc block 64, and the other end of the return spring 65 abuts against the upper end surface of the piston tube 67;

[0049] The adsorption mechanism 7 includes an air channel 73, which is opened in the telescopic column 51, the air channel 73 is connected to the rubber suction cup 52, the lower end of the air channel 73 is fixedly connected to the hose 72, the hose 72 is arranged in the groove 53, and the hose 72 is fixedly connected to the air guide tube 71.

[0050] In the embodiment, when the transport boat 2 moves on the conveyor belt 1, the gear 62 on the transport boat 2 will rotate under the action of the rack 61, and the gear 62 will drive the cam 63 to rotate when rotating. When the cam 63 rotates, it will repeatedly squeeze the arc block 64, and the arc block 64 drives the push rod 66 to push and pull repeatedly in the piston tube 67. At the same time, the push rod 66 drives the piston 68 to slide repeatedly in the piston tube 67. When the piston 68 slides toward the direction close to the reset spring 65, the air in the air duct 71 is sucked away, and negative pressure is generated in the air duct 71. At the same time, the hose 72 and the airway 73 will also generate negative pressure. At this time, the rubber suction cup 52 can adsorb the glass surface of the liquid crystal display module to prevent the liquid crystal display module from being displaced or vibrated during transportation on the conveyor belt 1, thereby protecting the liquid crystal display module.

[0051] It should be noted that if Fig.11As shown, the two enlarged figures are state diagrams of the gears 62 at the corresponding positions of the racks 61 on both sides of the conveyor belt 1 meshing with each other. It can be seen that at the same time, the contact positions of the two corresponding cams 63 and the arc blocks 64 on the left and right are different, so under the action of the cam 63, one of the two corresponding pistons 68 sucks air into the air guide tube 71, and the other, on the contrary, supplies air to the air guide tube 71 (a horizontal row of adsorption mechanisms 7 has two air guide tubes 71 to supply air to it, and the horizontal row of adsorption mechanisms 7 can be numbered 123456 from left to right, among which the adsorption mechanisms 7 at odd positions are Air is supplied by one air duct 71, and the adsorption mechanism 7 at the even position is supplied by another air duct 71 (air is blown), so when one air duct 71 is sucked to generate negative pressure, the rubber suction cup 52 in the adsorption mechanism 7 at the odd position can adsorb the glass surface of the liquid crystal display module, and at the same time, gas enters the other air duct 71, and the rubber suction cup 52 in the adsorption mechanism 7 at the odd position is out of air and cannot adsorb the glass surface of the liquid crystal module, but the lack of adsorption at this time will not have any effect, because the rubber suction cup 52 in the adsorption mechanism 7 at the odd position is sufficient to adsorb and fix the liquid crystal module. In summary, when the transport boat 2 moves on the conveyor belt 1, half of the rubber suction cups 52 always adsorb and fix the liquid crystal module, although the adsorption of the rubber suction cups 52 is alternately performed, it will not affect the protection effect.

[0052] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, a lifting mechanism 8 is arranged under the transport boat 2, and the lifting mechanism 8 includes an electric push rod 81, and the electric push rod 81 is fixed to the conveyor belt 1 through a bracket, and the output end of the electric push rod 81 is fixedly connected to a cross plate 82, and a plurality of T-shaped rods 83 are fixedly connected to the cross plate 82, and the T-shaped rods 83 correspond to the gaps on the transport boat 2 one by one.

[0053] In the embodiment, when it is necessary to move the LCD display module on one of the transport boats 2 to other conveyor belts 1, the transport boat 2 is first stopped by the baffle 4, and at the same time, the electric push rod 81 drives the cross plate 82 to move upward, and the cross plate 82 drives the T-shaped rod 83 to be pushed out from the gap of the transport boat 2, thereby taking the LCD display module on the transport boat 2 away from the transport boat 2.

[0054] It should be noted that when the transport boat 2 stops moving, the adsorption force of the rubber suction cup 52 on the liquid crystal display module gradually decreases, because the rubber suction cup 52 and the glass surface of the liquid crystal display module are not absolutely sealed.

[0055] like Figure 1 , Figure 4 and Figure 8As shown, a transplanting mechanism 9 is arranged above the transport boat 2, and the transplanting mechanism 9 includes a slide rail 91, and the slide rail 91 is arranged above the conveyor belt 1. A walking component 92 is arranged on the slide rail 91, and the lower end of the walking component 92 is fixedly connected to an electric lifting rod 93, and the lower end of the electric lifting rod 93 is fixedly connected to a support plate 94.

[0056] In the embodiment, after the T-bar 83 takes the LCD module away from the transport boat 2, the electric lifting rod 93 extends to drive the pallet 94 to move downward, and then the walking assembly 92 drives the electric lifting rod 93 and the pallet 94 to slide under the T-bar 83, and then the electric lifting rod 93 drives the pallet 94 to move upward, and the pallet 94 is pushed out from the gap between the multiple T-bars 83, taking the LCD module away from the T-bar 83, and then the walking assembly 92 drives the electric lifting rod 93, the pallet 94 and the LCD module to the top of another conveyor belt 1, and then the electric lifting rod 93 drives the pallet 94 to pass through the T-bar 83 on the conveyor belt 1, and leaves the LCD module on the T-bar 83, and then the walking assembly 92 drives the electric lifting rod 93 and the pallet 94 to leave, and the T-bar 83 is driven by the cross plate 82 and the electric push rod 81 to move downward through the gap of the transport boat 2, leaving the LCD module on the transport boat 2, completing the transfer of the LCD module.

[0057] The workflow is as follows:

[0058] First, the user places the LCD module with the glass surface facing downward on the transport boat 2. Under the gravity of the LCD module, the lower end of the telescopic column 51 pressed by the LCD module compresses the support spring 54 and the telescopic column 51 retracts into the groove 53. The telescopic column 51 that is not squeezed around the LCD module can limit it to prevent the LCD module from sliding around during transportation and causing collision damage. At the same time, the glass surface of the LCD module contacts the rubber suction cup 52. Because the rubber suction cup 52 is ductile, the contact area between the glass surface of the LCD module and the rubber suction cup 52 is increased, and the friction force is increased, which further improves the limiting effect of the LCD module. At the same time, the soft rubber suction cup 52 can prevent the glass surface of the LCD module from being scratched. When the LCD module and the transport boat 2 follow the movement of the conveyor belt 1, the gears 62 on both sides of the transport boat 2 follow the rotation of the rack 61. When the gear 62 rotates, it drives the cam 63 to rotate. When the cam 63 rotates, it drives the piston 68 to slide left and right in the piston tube 67 through the push rod 66, so there is an intermittent suction force on the air guide tube 71. Because the corresponding cam 63 has different effects on the arc block 64, the push rod 66, the piston tube 67 and the piston 68 at the same time, when one of the air guide tubes 71 drives the rubber suction cup 52 to adsorb the LCD module, the rubber suction cup 52 driven by the other air guide tube 71 has no adsorption effect on the LCD module, but the generated adsorption force is sufficient to prevent the LCD module from sliding during transportation. When it is necessary to move the LCD module to another conveyor belt 1, the cylinder 3 is first started, and the cylinder 3 drives the baffle 4 to extend to block the moving transport boat 2. At the same time, the electric push rod 81 works to drive the cross plate 82 to move upward, and the cross plate 82 drives the T-shaped rod 83 to push out from the gap of the transport boat 2, and the LCD module on the transport boat 2 is taken away from the transport boat 2. The electric lifting rod 93 extends to drive the pallet 94 to move downward, and then the walking assembly 92 drives the electric lifting rod 93 and the pallet 94 to slide under the T-shaped rod 83, and then the electric lifting rod 93 drives the pallet 94 to move upward, and the pallet 94 moves from multiple T-shaped The liquid crystal display module is pushed out from the gap of the T-bar 83, and the liquid crystal display module is taken away from the T-bar 83. Then the walking component 92 drives the electric lifting rod 93, the pallet 94 and the liquid crystal display module to the top of another conveyor belt 1. Then the electric lifting rod 93 drives the pallet 94 to pass through the T-bar 83 on the conveyor belt 1, and the liquid crystal display module is left on the T-bar 83. Then the walking component 92 drives the electric lifting rod 93 and the pallet 94 to leave, and the T-bar 83 is driven by the cross plate 82 and the electric push rod 81 to move downward through the gap of the transport boat 2, leaving the liquid crystal display module on the transport boat 2, and completing the transfer of the liquid crystal display module.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A conveying device for processing liquid crystal display modules, comprising a conveyor belt (1), wherein a transport boat (2) is arranged on the conveyor belt (1), characterized in that: A limit mechanism (5) is provided on the transport boat (2), the limit mechanism (5) comprising a groove (53), a plurality of the grooves (53) being provided on the transport boat (2), a telescopic column (51) being slidably connected in the groove (53), the lower end surface of the telescopic column (51) being fixedly connected to the bottom of the groove (53) via a support spring (54), the upper end of the telescopic column (51) extending out of the groove (53), the upper end surface of the telescopic column (51) being fixedly connected to a rubber suction cup (52), and a suction mechanism (7) being provided in the telescopic column (51); Cylinders (3) are provided on both sides of the conveyor belt (1); a baffle (4) is fixedly connected to the output shaft of the cylinder (3); the baffle (4) abuts against one side of the transport boat (2); The adsorption mechanism (7) comprises an air channel (73), the air channel (73) is opened in the telescopic column (51), the air channel (73) is communicated with the rubber suction cup (52), the lower end of the air channel (73) is fixedly connected to a hose (72), the hose (72) is arranged in the groove (53), and the hose (72) is fixedly connected to the air guide tube (71); A suction mechanism (6) is provided at one end of the air passage (73), the suction mechanism (6) comprising a rack (61), the rack (61) being fixedly connected to the inner side of the conveyor belt (1), the rack (61) being distributed on both sides of the transport boat (2), the rack (61) being meshed with a gear (62), the gear (62) being rotatably mounted on the side of the transport boat (2), the upper end surface of the gear (62) being fixedly connected to a cam (63), the cam (63) being in contact with an arc block (64); The arc block (64) is fixedly connected to a push rod (66) at one side away from the cam (63); an end of the push rod (66) away from the cam (63) extends into the interior of a piston tube (67) and is fixedly connected to a piston (68); and the piston (68) is slidably connected to the inner wall of the piston tube (67); A return spring (65) is nested on the push rod (66), one end of the return spring (65) abuts against the arc block (64), and the other end of the return spring (65) abuts against the upper end surface of the piston tube (67); A lifting mechanism (8) is provided below the transport boat (2), the lifting mechanism (8) comprising an electric push rod (81), the electric push rod (81) being fixed to the conveyor belt (1) via a bracket, the output end of the electric push rod (81) being fixedly connected to a transverse plate (82), a plurality of T-shaped rods (83) being fixedly connected to the transverse plate (82), the T-shaped rods (83) corresponding one to one to the gaps on the transport boat (2).

2. The conveying device for processing a liquid crystal display module as claimed in claim 1, characterized in that: A transplanting mechanism (9) is arranged above the transport boat (2), the transplanting mechanism (9) comprising a slide rail (91), the slide rail (91) being arranged above the conveyor belt (1), a travel assembly (92) being arranged on the slide rail (91), the lower end of the travel assembly (92) being fixedly connected to an electric lifting rod (93), and the lower end of the electric lifting rod (93) being fixedly connected to a support plate (94).

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