Rapid goods sorting auxiliary device of intelligent warehousing equipment

Abstract

The invention relates to the technical field of warehousing and sorting equipment, in particular to a quick goods sorting auxiliary device of intelligent warehousing equipment, which is characterized in that a transfer mounting frame is arranged on the right side of a belt conveyor, a rotary driving shaft is rotationally arranged on the transfer mounting frame through a bearing, a transfer table is fixedly arranged on the rotary driving shaft, and a material pushing stepping frame is arranged behind the transfer table; the fixed material pushing plate is fixedly arranged on the material pushing stepping frame, the lower side edge of the fixed material pushing plate movably abuts against the upper surface of the transfer table, the opening and closing driving shaft is rotationally arranged on the material pushing stepping frame through a bearing, the movable material pushing plate is fixedly arranged on the opening and closing driving shaft, and the movable material pushing plate is arranged on the left side of the fixed material pushing plate. The lower side edge of the movable pushing plate is higher than the upper surface of the transfer table; by arranging a goods delivery and transfer structure, when the goods are manually loaded and unloaded, the goods are sent out after being conveyed into the transfer and posture alignment device to be subjected to posture alignment, and the goods can conveniently enter intelligent equipment to be sorted in a correct posture.

Description

Technical Field

[0001] The present invention relates to the technical field of warehousing and sorting equipment, and in particular to a cargo rapid sorting auxiliary device for intelligent warehousing equipment. Background Art

[0002] When sorting goods in smart warehousing, a large number of intelligent devices are used to classify and transfer goods. However, no matter what kind of intelligent equipment is used, when sorting and distinguishing the types of goods, in order to ensure the accuracy of sorting, the goods need to be sent to the sorting intelligent equipment in the correct posture. The existing equipment can only manually correct the posture of the goods when loading and unloading, so that a large amount of manpower is required for sorting work. Although intelligent equipment is used, the labor intensity of manual labor cannot be reduced. Therefore, in order to cooperate with intelligent sorting equipment, an auxiliary equipment is needed that can perform posture correction when transferring goods, so that the goods can be sent out in the correct position and posture, which is convenient for intelligent identification and sorting. Summary of the invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the prior art and to provide a cargo rapid sorting auxiliary device for intelligent warehousing equipment. By setting up a cargo delivery and transfer structure, the cargo is sent to a transfer and posture adjustment device for posture adjustment during manual loading and unloading of the cargo, and then the cargo is sent out, making it convenient for the cargo to enter the intelligent device in the correct posture for sorting.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] It includes a loading platform and a belt conveyor, wherein the belt conveyor is arranged on the right side of the loading platform, and it also includes:

[0006] A transfer mechanism, wherein the transfer mechanism is arranged between the loading platform and the belt conveyor;

[0007] A material pushing mechanism, wherein the material pushing mechanism is arranged above the transfer mechanism;

[0008] The lifting mechanism is arranged on the left side of the transfer mechanism, and the loading platform is arranged on the lifting mechanism.

[0009] Preferably, the transport mechanism comprises:

[0010] A transfer mounting frame, wherein the transfer mounting frame is arranged on the right side of the belt conveyor;

[0011] A rotating drive shaft, wherein the rotating drive shaft is rotatably mounted on the transport mounting frame via a bearing;

[0012] A transfer platform, wherein the transfer platform is fixedly arranged on the rotating drive shaft, and the upper surface of the transfer platform is arranged flush with the upper surface of the belt conveyor;

[0013] The transfer motor is fixedly arranged on the transfer mounting frame, and the output shaft of the transfer motor is transmission-connected to the upper end of the rotating drive shaft.

[0014] Preferably, the loading platform comprises a loading fixing seat and a loading claw, wherein the loading claw is fixedly arranged on a side wall of the loading fixing seat facing the transfer platform, and an array of claw grooves are opened on the transfer platform at equal angles, and the loading claw is matched with the claw groove.

[0015] Preferably, the pushing mechanism comprises:

[0016] A material pushing stepping frame, wherein the material pushing stepping frame is arranged at the rear of the transfer platform;

[0017] A fixed push plate, wherein the fixed push plate is fixedly arranged on the push step frame, and the lower side of the fixed push plate is movably arranged on the upper surface of the transfer platform;

[0018] An opening and closing driving shaft, wherein the opening and closing driving shaft is rotatably mounted on the material pushing stepping frame through a bearing;

[0019] A dynamic push plate, which is fixedly arranged on the opening and closing drive shaft, and is arranged on the left side of the fixed push plate, and the lower side of the dynamic push plate is arranged higher than the upper surface of the transfer platform;

[0020] The opening and closing motor is fixedly arranged on the material pushing stepping frame, and the output shaft of the opening and closing motor is connected with the opening and closing driving shaft through a worm gear system.

[0021] Preferably, a pushing mounting frame is provided at the rear of the transfer platform, a pushing guide rod is fixedly provided on the pushing mounting frame, a pushing guide sleeve is fixedly provided on the pushing stepping frame, the pushing guide sleeve is movably sleeved on the pushing guide rod, a stepping screw pair is fixedly provided on the pushing mounting frame, and the stepping end of the stepping screw pair is fixedly provided on the pushing stepping frame.

[0022] Preferably, a material baffle plate is fixedly arranged on the platform of the belt conveyor, the rear surface of the material baffle plate is arranged at a certain angle to the tangent of the circular table surface of the transfer table, the lower side edge of the material baffle plate is movably abutted on the upper surface of the transfer table, and the front side edge of the fixed push plate is movably abutted on the rear surface of the material baffle plate.

[0023] Preferably, a connecting platform is fixedly provided on the side wall of the machine platform of the belt conveyor, and the side of the connecting platform is movably abutted against the side wall of the transfer platform.

[0024] Preferably, the lifting mechanism comprises:

[0025] Lifting rails, wherein two lifting rails form a group and are arranged in two groups, the two lifting rails in one group are arranged symmetrically front and back, and the two groups of lifting rails are arranged left and right and are arranged in parallel;

[0026] A connecting seat, wherein the connecting seat is slidably mounted on the lifting slide rail;

[0027] A lifting stepping seat, wherein the lifting stepping seat is arranged on the side of the lifting slide rail, the connecting seat is rotatably arranged on the lifting stepping seat through a rotating shaft, a sliding groove is opened on the inner wall of the lifting stepping seat, and the fixed seat is movably mounted in the lifting stepping seat through the sliding groove;

[0028] A lifting drive unit, wherein the lifting drive unit is arranged on the side of the lifting stepping seat and parallel to the lifting slide rail, and the stepping end of the lifting drive unit is connected to the lifting stepping seat by rotation through a rotating shaft;

[0029] The chain-type stepper is fixedly arranged on a lifting stepper seat, and the stepping end of the chain-type stepper is fixedly arranged on a fixed seat.

[0030] Preferably, a lifting mounting frame is provided on the outer side of the lifting slide rail, the lower end of the lifting slide rail is rotated on the lifting mounting frame through a rotating shaft, the lower end of the platform of the lifting drive unit is rotated on the lifting mounting frame through a rotating shaft, a lifting support frame is provided above the lifting mounting frame, the upper end of the lifting slide rail is rotated on the lifting support frame through a rotating shaft, and the upper end of the platform of the lifting drive unit is rotated on the lifting support frame through a rotating shaft.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This solution sets up a transfer platform and cooperates with the setting of a material baffle plate, so that the material on the loading platform can be sent to the belt conveyor through the transfer platform, and the position and posture of the goods can be adjusted, and the posture of the goods can be adjusted and sent into the belt conveyor before being sent out;

[0033] This solution sets a lifting slide rail and a lifting stepping seat through a lifting mounting frame and a lifting support frame, so that the loading platform is installed on the lifting stepping seat to deliver the materials to the transfer platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention.

[0035] Figure 2 yes Figure 1 Right front side view.

[0036] Figure 3 yes Figure 1 Left rear view.

[0037] Figure 4 yes Figure 1Rear right side view.

[0038] Figure 5 It is a structural schematic diagram of the lifting mechanism in the present invention.

[0039] Figure 6 It is a structural schematic diagram of the transfer mechanism in the present invention.

[0040] Figure 7 It is a structural schematic diagram of the material pushing mechanism in the present invention.

[0041] Figure 8 It is a structural schematic diagram of the material pushing stepping frame, the fixed material pushing plate and the dynamic material pushing plate in the present invention.

[0042] Description of reference numerals:

[0043] Loading platform 1, fixed seat 1-1, loading claw 1-2, belt conveyor 2, transfer mechanism 3, transfer mounting frame 3-1, rotating drive shaft 3-2, transfer platform 3-3, transfer motor 3-4, pushing mechanism 4, pushing stepping frame 4-1, fixed pushing plate 4-2, opening and closing drive shaft 4-3, dynamic pushing plate 4-4, opening and closing motor 4-5, lifting mechanism 5, lifting slide rail 5-1, connecting seat 5-2, lifting stepping seat 5-3, lifting drive unit 5-4, chain stepper 5-5, claw groove 6, pushing mounting frame 7, pushing guide rod 8, pushing guide sleeve 9, stepping screw pair 10, material blocking plate 11, connecting platform 12, lifting mounting frame 13, lifting support frame 14. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0045] like Figure 1-8 As shown, this specific implementation adopts the following technical solutions:

[0046] This specific embodiment includes a transfer mechanism 3, a loading platform 1, and a belt conveyor 2, wherein a lifting mechanism 5 is arranged on the left side of the transfer mechanism 3, the loading platform 1 is arranged on the lifting mechanism 5, a pushing mechanism 4 is mounted on the transfer mechanism 3, and a belt conveyor 2 is arranged on the right side of the transfer mechanism 3; the loading platform 1 is driven up and down by the lifting mechanism 5 to realize that the loading platform 1 is raised and the goods are placed on the loading platform 1, and after the loading platform 1 places the goods on the transfer mechanism 3, the goods are pushed to the belt conveyor 2 by the pushing mechanism 4 and sent out;

[0047] The lifting mechanism 5 includes a lifting mounting frame 13, a lifting slide rail 5-1, and a lifting stepping seat 5-3, wherein the lifting mounting seat is fixedly arranged on an external working platform, two lifting slide rails 5-1 are arranged in a group, and the lower ends of the lifting slide rails 5-1 are rotated on the lifting mounting frame 13 through a rotating shaft, and the lifting stepping seat 5-3 is arranged between the front and rear lifting slide rails 5-1, and the left and right ends of the side walls of the lifting stepping seat 5-3 are rotated with connecting seats 5-2 through rotating shafts, and the connecting seats 5-2 are slidably arranged on the lifting slide rails 5-1, and the lifting support frame 14 is arranged above the lifting mounting frame 13, and the upper end of the lifting slide rail 5-1 is diffracted on the lifting support frame 14 through the rotating shaft, and a lifting driving unit 5-4 is arranged on the side of the lifting stepping seat 5-3, and the upper and lower ends of the lifting driving unit 5-4 machine are respectively rotated on the lifting support frame 14 and the lifting mounting frame 13 through rotating shafts, and the stepping end of the lifting driving unit 5-4 is rotated with the lifting stepping seat 5-3 through the rotating shaft;

[0048] The loading platform 1 comprises a fixed seat 1-1 and a loading claw 1-2, wherein the loading claw 1-2 is fixedly arranged on the fixed seat 1-1, a slide groove is arranged on the inner wall of the lifting stepping seat 5-3, the fixed seat 1-1 is slidably mounted on the lifting stepping seat 5-3 through the slide groove, a chain stepper 5-5 is fixedly arranged on the lifting stepping seat 5-3, and the stepping end of the chain stepper 5-5 is connected and fixedly arranged with the fixed seat 1-1;

[0049] The transfer mechanism 3 includes a transfer mounting frame 3-1, a rotating drive shaft 3-2, and a transfer platform 3-3, wherein the transfer mounting frame 3-1 is arranged between the lifting mounting frame 13 and the belt conveyor 2, the rotating drive shaft 3-2 is rotatably arranged on the transfer mounting frame 3-1 through a bearing, the transfer platform 3-3 is fixedly arranged on the rotating drive shaft 3-2, and three groups of claw grooves 6 are opened on the transfer platform 3-3 at equal angles, and the loading claw 1-2 is matched with the claw groove 6. When the claw groove 6 on the transfer platform 3-3 is rotated to align with the loading claw 1-2, the loading claw 1-2 can move through the claw groove 6 to pass through the transfer platform 3-3, thereby placing the goods on the loading claw 1 -2, the loading claw 1-2 passes through the claw slot 6 to place the goods on the transfer platform 3-3, a transfer motor 3-4 is fixedly arranged on the transfer mounting frame 3-1, and the output shaft of the transfer motor 3-4 is transmission-connected with the rotating drive shaft 3-2; a connecting platform 12 is fixedly arranged on the left side wall of the machine platform of the belt conveyor 2, and the left side edge of the connecting platform 12 is movably abutted on the side wall of the transfer platform 3-3, a baffle plate 11 is fixedly arranged on the machine platform of the belt conveyor 2, and the lower side edge of the baffle plate 11 is movably abutted on the upper surface of the transfer platform 3-3, and the tangent of the circular table surface of the transfer platform 3-3 is arranged at an acute angle with the rear surface of the baffle plate 11;

[0050] The pushing mechanism 4 comprises a fixed pushing plate 4-2, a movable pushing plate 4-4, and a pushing stepping frame 4-1, wherein a pushing mounting frame 7 is arranged at the rear of the transfer platform 3-3, a pushing guide rod 8 is fixedly arranged on the pushing mounting frame 7, a pushing guide sleeve 9 is fixedly arranged on the pushing stepping frame 4-1, and the pushing guide sleeve 9 is movably sleeved on the pushing guide rod 8, a stepping screw pair 10 is fixedly arranged on the pushing mounting frame 7, and the stepping end of the stepping screw pair 10 is fixedly arranged on the pushing stepping frame 4-1, and a fixed pushing plate 4-2 is fixedly arranged on the pushing stepping frame 4-1, and a fixed pushing plate 4- The lower side of the fixed push plate 4-2 is movably abutted against the upper surface of the transfer platform 3-3, and the front side of the fixed push plate 4-2 is movably abutted against the rear surface of the baffle plate 11, an opening and closing drive shaft 4-3 is rotatably provided on the push stepping frame 4-1 through a bearing, a dynamic push plate 4-4 is fixedly provided on the opening and closing drive shaft 4-3, and the lower side of the dynamic push plate 4-4 is higher than the upper surface of the transfer platform 3-3, an opening and closing motor 4-5 is fixedly provided on the push stepping frame 4-1, a worm is provided on the output shaft of the opening and closing motor 4-5, a worm wheel is provided on the opening and closing drive shaft 4-3, and the worm and the worm wheel are meshingly provided.

[0051] When using this device, the lifting drive unit 5-4 drives the lifting stepper seat 5-3 to slide to the upper end of the lifting slide rail 5-1, and the chain stepper 5-5 pushes the fixed seat 1-1 to the right, thereby driving the loading claw 1-2 to extend to the right through the fixed seat 1-1, and placing the goods on the loading claw 1-2, then the lifting stepper seat 5-3 is lowered to drive the goods to lower, and the lifting stepper seat 5-3 drives the loading claw 1-2 to be clamped into the claw groove 6, so that the goods on the loading claw 1-2 are placed on the transfer platform 3-3, and then The fixed seat 1-1 is pulled to the left by the chain stepper 5-5, thereby driving the loading claw 1-2 to be pulled out from the claw groove 6 on the transfer platform 3-3; the transfer motor 3-4 drives the rotating drive shaft 3-2 to rotate, thereby driving the transfer platform 3-3 to rotate, and the transfer platform 3-3 drives the goods on it to rotate and move, and makes the goods on the transfer platform 3-3 first abut against the material baffle plate 11, and as the transfer platform 3-3 continues to rotate, the front end of the goods abuts against the rear surface of the material baffle plate 11, thereby adjusting the posture of the goods, and the goods move and abut On the fixed push plate 4-2, the transfer platform 3-3 is then rotated to align a set of claw grooves 6 thereon with the loading claws 1-2, that is, the transfer platform 3-3 is stopped from continuing to rotate, and then the opening and closing motor 4-5 drives the opening and closing drive shaft 4-3 to rotate so that the dynamic push plate 4-4 rotates parallel to the fixed push plate 4-2, so that the goods on the transfer platform 3-3 are clamped between the dynamic push plate 4-4 and the fixed push plate 4-2, and then the push stepping frame 4-1 is pushed to move to the right by the stepping screw pair 10, thereby driving the fixed push plate 4-2 and the dynamic push plate 4-2. The push plate 4-4 moves to the right, thereby driving the goods to move to the right from the transfer platform 3-3 to the belt conveyor 2, and then the goods are sent out through the belt conveyor 2; as the position of the goods loaded on the loading platform 1 changes, the position of the upper end of the lifting slide rail 5-1 is adjusted by moving the lifting support frame 14, and the lifting mounting frame 13, the lifting support frame 14 and the lifting slide rail 5-1 are rotated together to realize the translational movement of the lifting support frame 14, that is, the lifting slide rail 5-1 is adjusted to rotate in an inclined manner and keep the loading platform 1 in a horizontal position.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The device sets a transfer platform 3-3 between the loading platform 1 and the belt conveyor 2, and sets a baffle plate 11, a fixed push plate 4-2, and a dynamic push plate 4-4 to realize that after the goods are sent to the transfer platform 3-3, the transfer platform 3-3 and the baffle plate 11 cooperate to adjust the position and posture of the goods, and then the goods are sent to the belt conveyor 2 and sent out;

[0054] 2. The device is provided with a lifting rail 5-1 whose upper end position can be rotatably adjusted. The lifting rail 5-1 and the lifting drive unit 5-4 are installed through the lifting mounting frame 13 and the lifting support frame 14. After adjusting the position of the lifting support frame 14, the horizontal position of the loading platform 1 is maintained, thereby keeping the goods delivered to the transfer platform 3-3.

[0055] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cargo rapid sorting auxiliary device for intelligent warehousing equipment, comprising a loading platform (1) and a belt conveyor (2), wherein the belt conveyor (2) is arranged on the right side of the loading platform (1); characterized in that: It also contains: A transfer mechanism (3), wherein the transfer mechanism (3) is arranged between the loading platform (1) and the belt conveyor (2); A material pushing mechanism (4), wherein the material pushing mechanism (4) is mounted above the transfer mechanism (3); A lifting mechanism (5) is arranged on the left side of the transfer mechanism (3), and the loading platform (1) is arranged on the lifting mechanism (5).

2. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 1 is characterized in that: The transfer mechanism (3) comprises: A transfer installation frame (3-1), wherein the transfer installation frame (3-1) is arranged on the right side of the belt conveyor (2); A rotating drive shaft (3-2), wherein the rotating drive shaft (3-2) is rotatably mounted on the transport mounting frame (3-1) via a bearing; A transfer platform (3-3), wherein the transfer platform (3-3) is fixedly arranged on the rotating drive shaft (3-2), and the upper surface of the transfer platform (3-3) is arranged flush with the upper surface of the belt conveyor (2); The transfer motor (3-4) is fixedly arranged on the transfer mounting frame (3-1), and the output shaft of the transfer motor (3-4) is transmission-connected to the upper end of the rotating drive shaft (3-2).

3. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 2 is characterized in that: The loading platform (1) comprises a loading fixing seat (1-1) and a loading claw (1-2), wherein the loading claw (1-2) is fixedly arranged on a side wall of the loading fixing seat (1-1) facing the transfer platform (3-3), and an array of claw grooves (6) are arranged on the transfer platform (3-3) at equal angles, and the loading claw (1-2) is matched with the claw groove (6).

4. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 2 is characterized in that: The pushing mechanism (4) comprises: A material pushing stepping frame (4-1), wherein the material pushing stepping frame (4-1) is arranged at the rear of the transfer platform (3-3); A fixed material pushing plate (4-2), wherein the fixed material pushing plate (4-2) is fixedly arranged on the material pushing stepping frame (4-1), and the lower side of the fixed material pushing plate (4-2) is movably arranged against the upper surface of the transfer platform (3-3); An opening and closing driving shaft (4-3), wherein the opening and closing driving shaft (4-3) is rotatably mounted on the material pushing stepping frame (4-1) via a bearing; A dynamic push plate (4-4), wherein the dynamic push plate (4-4) is fixedly arranged on the opening and closing drive shaft (4-3), and the dynamic push plate (4-4) is arranged on the left side of the fixed push plate (4-2), and the lower side of the dynamic push plate (4-4) is arranged higher than the upper surface of the transfer platform (3-3); An opening and closing motor (4-5) is fixedly arranged on the material pushing stepping frame (4-1), and an output shaft of the opening and closing motor (4-5) is connected to an opening and closing driving shaft (4-3) through a worm gear system.

5. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 4 is characterized in that: A material pushing mounting frame (7) is arranged at the rear of the transfer platform (3-3), a material pushing guide rod (8) is fixedly arranged on the material pushing mounting frame (7), a material pushing guide sleeve (9) is fixedly arranged on the material pushing stepping frame (4-1), the material pushing guide sleeve (9) is movably sleeved on the material pushing guide rod (8), a stepping screw pair (10) is fixedly arranged on the material pushing mounting frame (7), and a stepping end of the stepping screw pair (10) is fixedly arranged on the material pushing stepping frame (4-1).

6. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 4 is characterized in that: A material baffle plate (11) is fixedly arranged on the machine platform of the belt conveyor (2); the rear surface of the material baffle plate (11) is arranged at a certain angle to the tangent line of the circular table surface of the transfer platform (3-3); the lower side of the material baffle plate (11) is movably abutted against the upper surface of the transfer platform (3-3); and the front side of the fixed push plate (4-2) is movably abutted against the rear surface of the material baffle plate (11).

7. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 6 is characterized in that: A connecting platform (12) is fixedly arranged on the side wall of the machine platform of the belt conveyor (2), and the side edge of the connecting platform (12) is movably abutted against the side wall of the transfer platform (3-3).

8. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 3 is characterized in that: The lifting mechanism (5) comprises: Lifting slide rails (5-1), wherein two lifting slide rails (5-1) form a group and are arranged in two groups, the two lifting slide rails (5-1) in one group are arranged symmetrically in front and back, and the two groups of lifting slide rails (5-1) are arranged left and right and are arranged in parallel; A connecting seat (5-2), wherein the connecting seat (5-2) is slidably mounted on the lifting slide rail (5-1); A lifting step seat (5-3), wherein the lifting step seat (5-3) is arranged on the side of the lifting slide rail (5-1), the connecting seat (5-2) is rotatably arranged on the lifting step seat (5-3) through a rotating shaft, a sliding groove is provided on the inner wall of the lifting step seat (5-3), and the fixed seat (1-1) is movably mounted in the lifting step seat (5-3) through the sliding groove; A lifting drive unit (5-4), wherein the lifting drive unit (5-4) is arranged on the side of the lifting stepping seat (5-3) and is arranged parallel to the lifting slide rail (5-1), and the stepping end of the lifting drive unit (5-4) is rotationally connected to the lifting stepping seat (5-3) via a rotating shaft; A chain-type stepper (5-5), wherein the chain-type stepper (5-5) is fixedly arranged on a lifting stepper seat (5-3), and a stepping end of the chain-type stepper (5-5) is fixedly arranged on a fixed seat (1-1).

9. The cargo rapid sorting auxiliary device for intelligent warehousing equipment according to claim 8, characterized in that: A lifting mounting frame (13) is arranged on the outer side of the lifting rail (5-1); the lower end of the lifting rail (5-1) is rotatably mounted on the lifting mounting frame (13) via a rotating shaft; the lower end of the platform of the lifting drive unit (5-4) is rotatably mounted on the lifting mounting frame (13) via a rotating shaft; a lifting support frame (14) is arranged above the lifting mounting frame (13); the upper end of the lifting rail (5-1) is rotatably mounted on the lifting support frame (14) via a rotating shaft; and the upper end of the platform of the lifting drive unit (5-4) is rotatably mounted on the lifting support frame (14) via a rotating shaft.

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