Large heavy-load product transferring and conveying equipment and control method thereof

Abstract

The invention relates to large-scale heavy-load product transferring and conveying equipment and a control method thereof. The large-scale heavy-load product transferring and conveying equipment comprises a chassis truck, a control system, a power supply system, a supporting system, a lifting system and a loading platform, the loading platform comprises a bearing platform main body, a platform locking mechanism, an unpowered transfer roller and at least two forks; according to the control method of the equipment, two-time lifting is adopted, so that the locking rod and the goods shelf are temporarily locked, then the stop block at the outward extending end of the pallet fork hooks a pallet of the goods shelf, and stable transferring and conveying of large heavy-load products among the multi-layer space goods shelf within the height range of 820-5280 mm are achieved. The problems that in the prior art, when large heavy-load products are stored, transferred and conveyed, efficiency is not high, the intelligent degree is low, the anti-overturning force is insufficient, and stability is not high are solved, and meanwhile stable transferring and conveying of the large heavy-load products among the multi-layer space goods shelves are achieved; and the device has the advantages of high transferring and conveying efficiency, good stability, large loading capacity, high intelligent degree and wide application.

Description

Technical Field

[0001] The invention relates to a transfer and conveying device, and in particular to a large-scale heavy-load product transfer and conveying device and a control method thereof. Background Art

[0002] At present, most large and heavy-loaded products are stored on shelves, and storage and transportation are mostly carried out manually with the help of overhead cranes. This method is inefficient and cannot meet the requirements of intelligent management and control of large and heavy-loaded products and efficient warehousing. In addition, the existing lifting platforms have insufficient anti-overturning force for transferring and transporting large and heavy-loaded products when the height exceeds 3500mm, and have poor stability, which can easily lead to accidents and cause property losses. Summary of the invention

[0003] The purpose of the present invention is to solve the problems of low efficiency and low intelligence of the transfer equipment in the prior art when storing, transferring and transporting large and heavy-loaded products, especially the insufficient anti-overturning force and low stability of the lifting platform when transferring and transporting large and heavy-loaded products after the height exceeds 3500mm.

[0004] The concept of the present invention is to achieve high stability and intelligence when transferring and conveying large and heavy-loaded products within a height of 820mm-5280mm through the cooperation between the support system and other systems.

[0005] In order to achieve the above purpose and complete the above invention concept, the present invention adopts the following technical solutions:

[0006] A large-scale heavy-load product transfer and conveying equipment comprises a chassis vehicle and a control system, a power supply system, a lifting system and an upper loading platform arranged on the chassis vehicle.

[0007] The lifting system is used to drive the upper loading platform to rise and fall.

[0008] The upper loading platform comprises a load-bearing platform body and at least two cargo forks which are arranged on the load-bearing platform body and extend and retract along the width direction of the load-bearing platform body.

[0009] Its special feature is that it also includes a support system.

[0010] The support system includes three scissor fork mechanisms and scissor fork locking mechanisms for respectively locking the corresponding scissor fork mechanisms; two of the scissor fork mechanisms are respectively arranged at the front end and the rear end of the chassis vehicle along the width direction of the chassis vehicle, and are respectively located at the diagonal positions of the chassis vehicle after maximum extension; the third scissor fork mechanism is arranged in the middle part of the chassis vehicle along the length direction of the chassis vehicle.

[0011] The upper ends of the three scissor fork mechanisms are respectively connected to the upper loading platform, and the lower ends are respectively connected to the chassis vehicle.

[0012] The outwardly extending end of the fork is provided with a stopper for hooking the shelf pallet.

[0013] The control system is used to control the operation of the upper loading platform, the lifting system, the supporting system and the chassis vehicle.

[0014] The power supply system is used to supply power to the upper loading platform, the lifting system, the supporting system and the chassis vehicle.

[0015] Furthermore, the scissor fork mechanism includes an upper guide rail, a lower guide rail, and a plurality of scissor forks sequentially connected in series up and down.

[0016] The upper guide rail is fixedly connected to the upper loading platform, the lower guide rail is fixedly connected to the chassis vehicle, the sliding end of the lowermost scissor fork can move on the lower guide rail, and the sliding end of the uppermost scissor fork can move on the upper guide rail.

[0017] Furthermore, the scissor fork locking mechanism includes a driving motor, a first lead screw and a nut seat stopper which are connected in sequence.

[0018] The nut seat stopper moves along the lower guide rail and is located outside the sliding end of the lowermost scissor fork.

[0019] The first lead screw and the nut seat block form a ball screw pair.

[0020] The driving motor drives the nut seat stopper to move along the lower guide rail through the first lead screw, so as to lock the sliding end below the scissor fork mechanism.

[0021] Furthermore, the upper loading platform also includes at least two platform locking mechanisms.

[0022] The platform locking mechanism comprises a slide rail, a moving plate, a telescopic servo motor, a gearbox, a second screw rod, a rotating servo motor, a nut, and a locking assembly.

[0023] The locking assembly comprises a support seat, a locking rod and locking blocks arranged at both ends of the locking rod, and is used to connect the upper loading platform with the shelf; the locking blocks are rectangular blocks.

[0024] The movable plate is arranged on the bearing platform body through a slide rail.

[0025] The rotary servo motor, the gearbox, the telescopic servo motor and the second lead screw are arranged on the bearing platform body.

[0026] The support seat is arranged on the movable plate, and the locking rod is arranged on the support seat and can rotate relative to the support seat.

[0027] The output end of the telescopic servo motor is connected to the second lead screw, the second lead screw and the nut form a ball screw pair, and the nut is fixedly connected to the moving plate.

[0028] The output shaft of the rotary servo motor is fixedly connected to the input gear of the gearbox; the output gear of the gearbox is sleeved on the locking rod to drive the locking rod to rotate; the output gear of the gearbox can slide relative to the locking rod.

[0029] Furthermore, the upper loading platform also includes two groups of unpowered transfer rollers arranged along the width direction of the load-bearing platform body, which are used to realize the movement of the shelf pallet along the width direction of the load-bearing platform body.

[0030] Furthermore, the lifting system includes at least four groups of rigid chains and a rigid chain driving mechanism arranged on the chassis vehicle.

[0031] The upper end of the rigid chain is fixed to the bottom of the upper loading platform.

[0032] The output end of the rigid chain driving mechanism is connected to the lower end of the rigid chain.

[0033] Furthermore, the rigid chain driving mechanism is a worm gear reducer.

[0034] Furthermore, the chassis vehicle includes at least four differential wheel sets.

[0035] At the same time, the present invention also provides a control method for a large-scale heavy-load product transfer and conveying device, which is based on the above-mentioned large-scale heavy-load product transfer and conveying device, and its special feature is that it includes the following steps:

[0036] Step 1: The chassis moves to the designated position in front of the shelf;

[0037] Step 2: The rigid chain drives the upper loading platform to a first height; the first height is lower than the height of the bottom of the shelf pallet;

[0038] Step 3: The fork extends to the bottom of the shelf pallet to be taken out;

[0039] Step 4: The rigid chain drives the upper loading platform to rise again and reach the height where the bottom of the shelf pallet to be taken out is located;

[0040] Step 5: Extend the locking rod forward and rotate it 90 degrees to temporarily lock the upper loading platform and the shelf;

[0041] Step 6, the nut seat block moves toward the sliding end of the scissor fork mechanism to lock it;

[0042] Step 7: The fork is retracted, and the block at the extended end of the fork drives the shelf pallet to be taken out to move along the unpowered transfer roller of the shelf to the unpowered transfer roller of the upper loading platform;

[0043] Step 8: The locking rod is rotated 90 degrees in the opposite direction and then moved back to release the temporary lock between the upper loading platform and the shelf;

[0044] Step nine, the nut seat block moves away from the sliding end of the scissor fork mechanism, the lock on the scissor fork mechanism is released, the rigid chain drives the upper platform to descend, and then the chassis moves; or, the nut seat block does not release the lock on the scissor fork mechanism, and the chassis moves at the same time.

[0045] Beneficial effects of the present invention:

[0046] 1. The large-scale heavy-load product transfer and conveying equipment of the present invention improves the anti-overturning force during the transfer and conveying of large-scale heavy-load products within the height range of 820mm-5280mm, especially at a height above 3500mm; and through the coordinated actions between various systems, while reducing the height of the whole vehicle, the lifting space is increased, which can adapt to different shelf heights and facilitate storage and retrieval, and also realize the stable transfer and conveying of large-scale heavy-load products between multi-layer space shelves, and has wide practicality.

[0047] 2. The large-scale heavy-load product transfer and conveying equipment of the present invention has a platform locking function, which improves the stability of the large-scale heavy-load products during the transfer process.

[0048] 3. The large heavy-load product transfer and conveying equipment of the present invention can achieve that after the large heavy-load product transfer action is completed, the upper loading platform still maintains a height within 820mm-5280mm to move and convey the large heavy-load product, and during the moving and conveying process, it can not only maintain sufficient anti-overturning force, but also offset the inertia force generated during the moving and conveying process, so that the moving and conveying of the large heavy-load product is more stable.

[0049] 4. The large-scale heavy-load product transfer and conveying equipment of the present invention has high overall mechanical strength, compact structure, high stability, large load capacity, and high intelligence, which greatly improves the efficiency of transfer and conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the closed state structure of an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0051] Figure 2 It is a schematic diagram of the structure of a large-scale heavy-load product transfer and conveying device according to an embodiment of the present invention in an extended state;

[0052] Figure 3 It is a bottom view of a chassis vehicle of an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0053] Figure 4 It is a partially enlarged schematic diagram of an upper loading platform of an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0054] Figure 5It is a schematic diagram of the structure of two scissor fork mechanisms in an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0055] Figure 6 It is a schematic structural diagram of a scissor fork locking mechanism of two scissor fork mechanisms in an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0056] Figure 7 It is a partial structural schematic diagram of the scissor fork locking mechanism of two scissor fork mechanisms in an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0057] Figure 8 This is a schematic diagram of the third scissor fork mechanism structure of an embodiment of a large-scale heavy-load product transfer and conveying device of the present invention;

[0058] Fig. 9 It is a schematic structural diagram of a scissor fork locking mechanism of a third scissor mechanism of an embodiment of a large-scale heavy-load product transfer and conveying device of the present invention;

[0059] Fig.10 It is a schematic diagram of the structure of a platform locking mechanism of an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention;

[0060] Fig.11 It is a schematic diagram of a shelf and a shelf pallet of an embodiment of a large-scale heavy-load product transfer and conveying equipment of the present invention.

[0061] Figure numbers: 1-carrying platform body; 2-platform locking mechanism, 21-slide rail, 22-moving plate, 23-telescopic servo motor, 24-gearbox, 25-second lead screw, 26-rotation servo motor, 27-support seat, 28-locking rod, 29-locking block, 30-nut, 31-limiting long spline; 3-unpowered transfer roller; 4-fork, 41-block; 5-scissor fork mechanism, 51-upper guide rail, 52-lower guide rail, 53-sliding end; 6-rigid chain; 7-rigid chain driving mechanism; 8-scissor fork locking mechanism, 81-driving motor, 82-first lead screw, 83-nut seat block; 9-chassis vehicle; 10-control system; 11-wheel train assembly; 12-power system; 13-shelf pallet; 14-locking slot. DETAILED DESCRIPTION

[0062] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0063] The embodiment of the present invention provides a large-scale heavy-load product transfer and conveying device and a control method thereof, Figure 1 and Figure 2 As shown, the large-scale heavy-load product transfer and conveying equipment includes a chassis vehicle 9 and a support system, a control system 10, a power supply system 12, a lifting system and an upper loading platform arranged on the chassis vehicle 9.

[0064] Combination Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the support system includes three scissor fork mechanisms 5 and scissor fork locking mechanisms 8 for respectively locking the corresponding scissor fork mechanisms 5; two of the scissor fork mechanisms 5 are respectively arranged at the front end and the rear end of the chassis vehicle 9 along the width direction of the chassis vehicle 9, and are respectively located at the diagonal positions of the chassis vehicle 9 after maximum extension; the third scissor fork mechanism 5 is arranged at the middle part of the chassis vehicle 9 along the length direction of the chassis vehicle 9; the upper ends of the three scissor fork mechanisms 5 are respectively connected to the upper loading platform, and the lower ends are respectively connected to the chassis vehicle 9; the scissor fork mechanism 5 includes an upper guide rail 51, a lower guide rail 52 and a plurality of scissor forks connected in series in sequence from top to bottom; the upper guide rail 51 is connected to the upper loading platform The lower guide rail 52 is fixedly connected to the chassis 9, the sliding end 53 of the lowest scissors fork can move on the lower guide rail 52, and the sliding end 53 of the highest scissors fork can move on the upper guide rail 51; the scissors fork locking mechanism 8 includes a driving motor 81, a first lead screw 82 and a nut seat block 83 connected in sequence; the nut seat block 83 moves along the lower guide rail 52 and is located on the outside of the sliding end 53 of the lowest scissors fork; the first lead screw 82 and the nut seat block 83 constitute a ball screw pair; the driving motor 81 drives the nut seat block 83 to move along the lower guide rail 52 through the first lead screw 82, so as to lock the sliding end 53 below the scissors fork mechanism 5.

[0065] Combination Figure 2 , Figure 4 , Fig.10 and Fig.11As shown, the upper loading platform includes a load-bearing platform body 1, two platform locking mechanisms 2, two sets of unpowered transfer rollers 3, and two forks 4 arranged on the load-bearing platform body 1 and extending and retracting along the width direction of the load-bearing platform body 1; the extended end of the fork 4 is provided with a stopper 41 for hooking the shelf pallet 13; the platform locking mechanism 2 is used to connect the upper loading platform with the shelf, so that the transfer process of large and heavy-loaded products is more stable; the platform locking mechanism 2 includes a slide rail 21, a moving plate 22, a telescopic servo motor 23, a gearbox 24, a second screw rod 25, a rotating servo motor 26, a nut 30, and a locking assembly; the locking assembly includes a support seat 27, a limit long spline 31, a locking rod 28 and locking blocks 29 arranged at both ends of the locking rod 28, which are used to connect the upper loading platform with the shelf; the locking block 29 is a rectangular block, which is temporarily locked or disengaged from the locking slot 14 of the shelf through the action of the locking rod 28; the moving plate 22 is arranged on the load-bearing platform body 1 through the slide rail 21 ; The rotary servo motor 26, the gearbox 24, the telescopic servo motor 23, and the second lead screw 25 are arranged on the bearing platform body 1; the support seat 27 is arranged on the movable plate 22, and the locking rod 28 is arranged on the support seat 27 and can rotate relative to the support seat 27; the limit long spline 31 is arranged on the locking rod 28, which is used to ensure that the locking rod 28 can move while limiting the rotation of the locking rod 28; the output end of the telescopic servo motor 23 is connected to the second lead screw 25, the second lead screw 25 and the nut 30 constitute a ball screw pair, and the nut 30 is fixedly connected to the movable plate 22; the output shaft of the rotary servo motor 26 is fixedly connected to the input gear of the gearbox 24; the output gear of the gearbox 24 is sleeved on the locking rod 28, which is used to drive the locking rod 28 to rotate; the output gear of the gearbox 24 can slide relative to the locking rod 28; the unpowered transfer roller 3 is arranged on the bearing platform body 1 along the width direction of the bearing platform body 1, which is used to realize the movement of the shelf pallet 13 along the width direction of the bearing platform body 1.

[0066] like Figure 2 As shown, the lifting system includes four groups of rigid chains 6 and a rigid chain driving mechanism 7 arranged on a chassis vehicle 9, which is used to drive the lifting of the upper loading platform; the upper end of the rigid chain 6 is fixed to the bottom of the upper loading platform; the output end of the rigid chain driving mechanism 7 is connected to the lower end of the rigid chain 6; the rigid chain driving mechanism 7 is a worm gear reducer, and its output shaft is respectively connected to the input shaft of the rigid chain 6.

[0067] like Figure 2As shown, the control system 10 includes an upper loading platform control device, a lifting control device, a support control device, and a chassis vehicle control device, which are used to control the coordinated actions between the upper loading platform, the lifting system, the support system, and the chassis vehicle 9, thereby realizing the storage, transfer, and transportation of large heavy-loaded products within a height range of 820mm-5280mm; each system receives instructions from the control system 10 through a servo motor; and the power supply system 12 is used to supply power to the upper loading platform, the lifting system, the support system, and the chassis vehicle 9.

[0068] like Figure 3 As shown, the chassis 9 includes four wheel train components 11, all of which are differential wheel sets, which are arranged at the bottom of the chassis 9 and symmetrically arranged at the front and rear ends of the bottom of the chassis 9 along the width direction; the wheel train components 11 are responsible for the omnidirectional movement of the entire platform system under no-load and loaded conditions; a differential drive wheel uses two independent drive motors to drive two drive wheels, when the two motors have the same speed, the differential will make the two drive wheels rotate at the same speed, so that the vehicle travels in a straight line; when the two motors have different speeds, the differential will make the two drive wheels rotate at different speeds, so that the vehicle can turn.

[0069] See also Fig.11 In this embodiment, the control method for transferring and conveying large heavy-load products by the above-mentioned equipment includes the following steps:

[0070] Step 1: The chassis vehicle 9 moves to a designated position in front of the shelf through a preset route;

[0071] Step 2: The rigid chain driving mechanism 7 drives the rigid chain 6 to lift the upper loading platform, and the scissor fork mechanism 5 extends as the rigid chain 6 and the upper loading platform are lifted by sliding in the upper guide rail 51 and the lower guide rail 52; when the upper loading platform reaches a first height lower than the bottom of the shelf pallet 13, the rigid chain driving mechanism 7 stops driving, and the rigid chain 6 provides preliminary support for the entire upper loading platform;

[0072] Step 3, the fork 4 extends to the bottom of the shelf pallet 13 to be taken out;

[0073] Step 4: the rigid chain driving mechanism 7 drives the rigid chain 6 again to lift the upper loading platform to the height where the bottom of the shelf pallet 13 to be taken out is located. At this time, the fork 4 contacts the bottom of the shelf pallet 13, and the inner wall of the stopper 41 at the extended end of the fork 4 contacts the lower edge of the bottom of the shelf pallet 13;

[0074] Step 5: The platform locking mechanism 2 drives the locking rod 28 to extend forward, so that the locking block 29 enters the locking slot 14 of the shelf, and then drives the locking rod 28 to rotate 90 degrees, so that the locking block 29 and the locking slot 14 of the shelf are temporarily locked, thereby temporarily locking the upper loading platform and the shelf;

[0075] Step 6: The scissor fork locking mechanism 8 drives the nut seat block 83 to move toward the sliding end 53 of the scissor fork mechanism 5 to lock it; at this time, the entire support system supports the upper loading platform;

[0076] Step 7, the fork 4 is retracted, and at the same time, the stopper 41 at the extended end of the fork 4 drives the shelf pallet 13 to be taken out to move along the unpowered transfer roller 3 of the shelf to the unpowered transfer roller 3 of the upper loading platform;

[0077] Step 8: The platform locking mechanism 2 drives the locking rod 28 to rotate 90 degrees in the reverse direction, releases the temporary locking between the locking block 29 and the locking slot 14 of the shelf, and then drives the locking rod 28 backward, thereby releasing the temporary locking between the upper loading platform and the shelf;

[0078] Step nine, the scissor fork locking mechanism 8 drives the nut seat block 83 away from the sliding end 53 of the scissor fork mechanism 5, unlocks the scissor fork mechanism 5, the rigid chain 6 drives the upper platform to descend, and then the chassis 9 moves; or, the nut seat block 83 does not unlock the scissor fork mechanism 5, and the chassis 9 moves at the same time. At this time, the support system cooperates with the coordinated actions of other systems to still maintain excellent anti-overturning force, and can also offset the inertial force during movement, making mobile transportation more stable.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large-scale heavy-load product transfer and conveying device, comprising a chassis vehicle (9) and a control system (10), a power supply system (12), a lifting system and an upper loading platform arranged on the chassis vehicle (9); The lifting system is used to drive the lifting of the upper loading platform; The upper loading platform comprises a load-bearing platform body (1) and at least two forks (4) arranged on the load-bearing platform body (1) and extending and retracting along the width direction of the load-bearing platform body (1); Features: It also includes support systems; The support system comprises three scissor fork mechanisms (5) and scissor fork locking mechanisms (8) for respectively locking the corresponding scissor fork mechanisms (5); two of the scissor fork mechanisms (5) are respectively arranged at the front end and the rear end of the chassis vehicle (9) along the width direction of the chassis vehicle (9), and are respectively located at diagonal positions of the chassis vehicle (9) after being fully extended; and the third scissor fork mechanism (5) is arranged at the middle part of the chassis vehicle (9) along the length direction of the chassis vehicle (9); The upper ends of the three scissor fork mechanisms (5) are respectively connected to the upper loading platform, and the lower ends are respectively connected to the chassis vehicle (9); The outwardly extending end of the fork (4) is provided with a stopper (41) for hooking the shelf pallet (13); The control system (10) is used to control the operation of the upper loading platform, the lifting system, the supporting system, and the chassis vehicle (9); The power supply system (12) is used to supply power to the upper loading platform, the lifting system, the supporting system and the chassis vehicle (9).

2. According to claim 1, a large-scale heavy-load product transfer and conveying equipment is characterized in that: The scissor fork mechanism (5) comprises an upper guide rail (51), a lower guide rail (52), and a plurality of scissor forks connected in series in sequence from top to bottom; The upper guide rail (51) is fixedly connected to the upper loading platform, the lower guide rail (52) is fixedly connected to the chassis vehicle (9), the sliding end (53) of the lowermost scissor fork can move on the lower guide rail (52), and the sliding end (53) of the uppermost scissor fork can move on the upper guide rail (51).

3. According to claim 2, a large-scale heavy-load product transfer and conveying equipment is characterized in that: The scissor fork locking mechanism (8) comprises a driving motor (81), a first lead screw (82) and a nut seat stopper (83) which are connected in sequence; The nut seat stopper (83) moves along the lower guide rail (52) and is located outside the sliding end (53) of the lowermost scissor fork; The first lead screw (82) and the nut seat stopper (83) form a ball screw pair; The driving motor (81) drives the nut seat stopper (83) to move along the lower guide rail (52) via the first lead screw (82), so as to lock the sliding end (53) below the scissor fork mechanism (5).

4. A large-scale heavy-load product transfer and conveying equipment according to claim 1, 2 or 3, characterized in that: The upper loading platform further comprises at least two platform locking mechanisms (2); The platform locking mechanism (2) comprises a slide rail (21), a moving plate (22), a telescopic servo motor (23), a gearbox (24), a second screw rod (25), a rotating servo motor (26), a nut (30), and a locking assembly; The locking assembly comprises a support seat (27), a locking rod (28) and locking blocks (29) arranged at both ends of the locking rod (28), and is used to connect the upper loading platform with the shelf; the locking block (29) is a rectangular block; The movable plate (22) is arranged on the bearing platform body (1) via a slide rail (21); The rotary servo motor (26), the gearbox (24), the telescopic servo motor (23), and the second lead screw (25) are arranged on the bearing platform body (1); The support seat (27) is arranged on the movable plate (22), and the locking rod (28) is arranged on the support seat (27) and can rotate relative to the support seat (27); The output end of the telescopic servo motor (23) is connected to the second screw (25), the second screw (25) and the nut (30) form a ball screw pair, and the nut (30) is fixedly connected to the moving plate (22); The output shaft of the rotary servo motor (26) is fixedly connected to the input gear of the gearbox (24); the output gear of the gearbox (24) is sleeved on the locking rod (28) to drive the locking rod (28) to rotate; the output gear of the gearbox (24) can slide relative to the locking rod (28).

5. The large-scale heavy-load product transfer and conveying equipment according to claim 4 is characterized in that: The upper loading platform also includes two groups of unpowered transfer rollers (3) arranged along the width direction of the load-bearing platform body (1), which are used to realize the movement of the shelf pallet (13) along the width direction of the load-bearing platform body (1).

6. The large-scale heavy-load product transfer and conveying equipment according to claim 5 is characterized in that: The lifting system comprises at least four groups of rigid chains (6) and a rigid chain driving mechanism (7) arranged on a chassis vehicle (9); The upper end of the rigid chain (6) is fixed to the bottom of the upper loading platform; The output end of the rigid chain driving mechanism (7) is connected to the lower end of the rigid chain (6).

7. The large-scale heavy-load product transfer and conveying equipment according to claim 6 is characterized in that: The rigid chain driving mechanism (7) is a worm gear reducer.

8. The large-scale heavy-load product transfer and conveying equipment according to claim 7 is characterized in that: The chassis vehicle (9) comprises at least four differential wheel sets (11).

9. A control method for a large-scale heavy-load product transfer and conveying device, based on the large-scale heavy-load product transfer and conveying device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: the chassis vehicle (9) moves to a designated position in front of the shelf; Step 2: The rigid chain (6) drives the upper loading platform to a first height; the first height is lower than the height of the bottom of the shelf pallet (13); Step 3, the fork (4) extends to the bottom of the shelf pallet (13) to be taken out; Step 4: The rigid chain (6) drives the upper loading platform to rise again and reaches the height where the bottom of the shelf pallet (13) to be taken out is located; Step 5: The locking rod (28) is extended forward and then rotated 90 degrees to temporarily lock the upper loading platform and the shelf; Step 6, the nut seat stopper (83) moves toward the sliding end (53) of the scissor fork mechanism (5) to lock it; Step 7, the fork (4) is retracted, and the stopper (41) at the extended end of the fork (4) drives the shelf pallet (13) to be taken out to move along the unpowered transfer roller (3) of the shelf to the unpowered transfer roller (3) of the upper loading platform; Step 8, the locking rod (28) is rotated 90 degrees in the reverse direction and then moved back to release the temporary lock between the upper loading platform and the shelf; Step nine, the nut seat block (83) moves away from the sliding end (53) of the scissor fork mechanism (5), the lock on the scissor fork mechanism (5) is released, the rigid chain (6) drives the upper platform to descend, and then the chassis vehicle (9) moves; or, the nut seat block (83) does not release the lock on the scissor fork mechanism (5), and the chassis vehicle (9) moves at the same time.

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