A loading device for cargo delivery

Abstract

The present invention discloses a loading device for cargo delivery, comprising: a supporting bottom plate connected to an external crossbeam bracket, provided with a driving mechanism and at least one driving belt; a plurality of lifting frames arranged in sequence in front of the supporting bottom plate, the back plates of adjacent lifting frames being connected by at least one synchronous lifting mechanism, the synchronous lifting mechanism including rolling elements respectively arranged at the upper and lower ends of the back plates of each lifting frame located between the supporting bottom plate and the outermost lifting frame, and a synchronous belt sleeved outside the back plates along the rolling elements, each lifting frame being capable of rising or falling simultaneously driven by the driving mechanism; a cargo carrying mechanism connected to the lower end of the outermost lifting frame for transporting and delivering cargo. The loading device for cargo delivery solves the problems of inconvenient precise adjustment of the total telescopic length and high cost of the existing loading devices by setting the synchronous lifting mechanism.

Description

Technical Field

[0001] The present invention relates to the field of loading robots, and particularly to a loading device for cargo delivery. Background Art

[0002] The loading robot mainly consists of a gantry arranged in a factory workshop and a loading device capable of carrying goods and moving horizontally back and forth and left and right on the gantry. It is often used to move and transfer the positions of goods. In order to facilitate the acquisition or delivery of goods at different height positions, the loading device is generally set to be a liftable structure.

[0003] Existing loading devices usually have multiple-stage lifting arms. For example, in a patent for invention named "A Multi-stage Telescopic Composite Robot Arm" (Publication No.: CN106078718B) disclosed in the prior art, it includes a first robot arm, a second robot arm, and a third robot arm. One end of the second robot arm is arranged in the hollow cavity of the first robot arm, and one end of the third robot arm is arranged in the hollow cavity of the second robot arm. The first robot arm is threadedly connected to the second robot arm, and the second robot arm is threadedly connected to the third robot arm. The second robot arm and the third robot arm are both driven by independent drive systems. In this technical solution, the robot arms are nested with each other, enabling multi-stage telescoping with a large telescoping range. However, each robot arm is driven by an independent drive system, which is not convenient for precisely controlling the total telescoping length and requires multiple independent drive systems to be configured simultaneously, resulting in high costs. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a loading device for cargo delivery, which solves the problems of the existing loading device being inconvenient for precisely controlling the total telescoping length and high cost.

[0005] The technical solution of the present invention is as follows:

[0006] A loading device for cargo delivery, comprising a supporting bottom plate, a plurality of lifting frames and a cargo-carrying mechanism. Among them, the supporting bottom plate is connected to an external crossbeam support, and a driving mechanism and at least one driving belt drivingly connected to the driving mechanism are arranged on the supporting bottom plate; the plurality of lifting frames are sequentially arranged in front of the supporting bottom plate, and the back plates of adjacent lifting frames are connected by at least one synchronous lifting mechanism. The synchronous lifting mechanism includes rolling members respectively arranged at the upper and lower ends of the back plates of each lifting frame located between the supporting bottom plate and the outermost lifting frame, and a synchronous belt sleeved outside the back plates along the rolling members. A front fixing member fixedly connected to the upper part of the back plate of a lifting frame in front is arranged at the front of the synchronous belt, and a rear fixing member fixedly connected to the lower part of a lifting frame or the supporting bottom plate behind is arranged at the rear of the synchronous belt. A front fixing member fixedly connected to the upper part of the back plate of a lifting frame in front is arranged at the front of the driving belt. Each lifting frame can be simultaneously lifted or lowered under the drive of the driving mechanism; the cargo-carrying mechanism is connected to the lower end of the outermost lifting frame and is used for transporting and delivering goods.

[0007] Preferably, the front fixing member is arranged as a plate structure fixedly connected to the inner side of the front of the driving belt or the synchronous belt, and is fixedly connected to the upper part of the back plate of a lifting frame in front through an adapter. The adapter includes a vertical adapter plate arranged on the outer side of the front of the driving belt or the synchronous belt, and the vertical adapter plate is fixedly connected to the front fixing member; the rear fixing member is arranged as a plate structure fixedly connected to the inner side of the rear of the synchronous belt, and is fixedly connected to the lower part of a lifting frame or the supporting bottom plate behind through a positioning member. The positioning member includes a vertical positioning plate arranged on the outer side of the rear of the synchronous belt, and the vertical positioning plate is fixedly connected to the rear fixing member.

[0008] Preferably, the adapter further includes a horizontal adapter plate connected to the front end of the vertical adapter plate. The upper part of the back plate of a lifting frame in front of the adapter extends backward to be provided with a horizontal docking plate. The horizontal adapter plate is stacked on the upper side of the horizontal docking plate and is fixedly connected to the horizontal docking plate. The bottom surface of the horizontal docking plate close to the rolling member at the upper end of the lifting frame behind it is arranged obliquely below the rolling member at the upper end of the lifting frame behind it; the positioning member further includes a positioning connection part connected to the vertical positioning plate, and the positioning connection part is fixedly connected to the lower part of a lifting frame or the supporting bottom plate behind it. The top surface of the positioning member close to the rolling member at the lower end of the lifting frame in front of it is arranged obliquely above the rolling member at the lower end of the lifting frame in front of it.

[0009] Preferably, an installation substrate is arranged at the front part of the supporting bottom plate and is arranged in parallel and at intervals with the supporting bottom plate. Rolling elements equal in number to the driving belts are respectively arranged at the upper and lower ends of the installation substrate. The driving belts are sleeved outside the installation substrate along the rolling elements. At the rear part of the supporting bottom plate, traction wheels and transmission wheels equal in number to the driving belts are arranged. The transmission wheels are fixedly connected through a wheel shaft. One of the transmission wheels is in transmission connection with a driving mechanism. The transmission wheels and the rolling elements at the lower end of the installation substrate are arranged on the same plane. The traction wheels are arranged above the transmission wheels and the front ends thereof protrude from the front part of the supporting bottom plate through a transmission channel penetrating through the lower part of the supporting bottom plate. The driving belts are sleeved on the outer sides of the transmission wheels. The outer sides of the driving belts are abutted against the front wall and the bottom wall of the traction wheels.

[0010] Preferably, at least one anti-falling component is arranged between the back plates of adjacent lifting frames. The anti-falling component includes a blocking piece arranged in the middle or at the lower part of the back plate of a rear lifting frame, an impact piece arranged at the upper part of the back plate of a front lifting frame, and a flexible piece arranged above the blocking piece. The bottom of the impact piece can be abutted against the top of the flexible piece. The flexible piece can provide a buffering force when the blocking piece is impacted by the impact piece.

[0011] Preferably, the rolling elements are fixed on the back plate of the lifting frame or the installation substrate through rolling bases. The rolling bases at the upper end of the back plate of the lifting frame are fixedly connected to the front part of the back plate. The rolling bases at the lower end of the back plate of the lifting frame are fixedly connected to the rear part of the back plate. The rolling bases at the upper and lower ends of the installation substrate are fixedly connected to the front part of the installation substrate. The rolling base includes a seat plate longitudinally movably connected to the back plate or the installation substrate, and a shaft plate and an adjusting plate respectively arranged at the upper and lower ends of the seat plate. The shaft plate is arranged on one side of the seat plate close to the back plate or the installation substrate. A shaft hole for installing a rolling shaft of the rolling element is arranged on the shaft plate. The length direction of the shaft hole is in the same vertical plane as the back plate or the installation substrate. The adjusting plate is arranged on one side of the seat plate far from the back plate or the installation substrate and is abutted against a convex part on the back plate or the installation substrate through a vertical adjusting piece. The relative distance between the adjusting plate and the convex part can be changed by adjusting the vertical adjusting piece.

[0012] Preferably, the upper end of the outermost lifting frame back plate is recessed downward to form a first groove, and the top surface of the horizontal docking plate on the outermost lifting frame back plate is flush with the bottom wall of the first groove and abuts against the bottom surface of the horizontal transfer plate at the same time; the upper and lower ends of each lifting frame back plate between the supporting bottom plate and the outermost lifting frame are respectively recessed inward to form mounting grooves for accommodating rolling elements, and the upper or lower end of each lifting frame back plate between the supporting bottom plate and the outermost lifting frame is recessed inward to form a base groove for accommodating a rolling base, and the base groove is located at the outer end of the mounting groove and is communicated with the mounting groove. The upper and lower ends of the mounting substrate are respectively recessed inward to form mounting grooves for accommodating rolling elements. The upper end of the mounting substrate is lower than the upper end of the supporting bottom plate, and the lower end of the mounting substrate is higher than the lower end of the supporting bottom plate.

[0013] Preferably, the lifting frame includes a first lifting frame, a second lifting frame and a third lifting frame arranged in sequence in front of the supporting bottom plate. The lower end of the third lifting frame back plate is recessed upward to form a connecting groove for connecting the cargo mechanism. The third lifting frame back plate is provided with a front connecting plate protruding forward and a rear connecting plate protruding backward. The bottom surfaces of the front connecting plate and the rear connecting plate are flush with the top wall of the connecting groove and jointly form a connecting platform for connecting with the cargo mechanism; two driving belts are arranged on the mounting substrate, two synchronous belts are arranged on the first lifting frame back plate, and one synchronous belt is arranged on the second lifting frame back plate. The front fixing parts on the two driving belts are fixedly connected to the same transfer part, and the horizontal transfer plate in the transfer part is arranged in the middle position of the vertical transfer plate and is located between the two synchronous belts on the first lifting frame. The rear fixing parts on the two synchronous belts on the first lifting frame are respectively fixedly connected to two positioning parts, and the positioning connecting parts in the two positioning parts are arranged outside the two driving belts. The front fixing parts on the two synchronous belts on the first lifting frame are respectively fixedly connected to two transfer parts, and the two transfer parts are arranged on both sides of the synchronous belt on the second lifting frame. The positioning part fixedly connected to the rear fixing part on the synchronous belt on the second lifting frame is arranged between the two synchronous belts on the first lifting frame.

[0014] Preferably, guide plates protruding forward in the longitudinal direction are respectively arranged on both sides of the supporting bottom plate and each lifting frame back plate between the supporting bottom plate and the outermost lifting frame, and moving plates protruding backward in the longitudinal direction are respectively arranged on both sides of each lifting frame back plate. The two guide plates on the supporting bottom plate are respectively fixedly connected to both sides of the mounting substrate; a guiding mechanism is arranged between the guide plates and the moving plates of adjacent lifting frames and the supporting bottom plate. The guiding mechanism includes a guide rail structure arranged on the outside of the guide plate in the longitudinal direction and a moving component arranged on the inside of the moving plate. Adjacent lifting frames and the supporting bottom plate are movably connected through the moving component and the guide rail structure and can move along the length direction of the guide rail structure.

[0015] Preferably, a constraint assembly is provided between the adjacent lifting frames and the lower ends of the guide plates on the supporting bottom plate. The constraint assembly includes a first limiting structure respectively arranged on the guide plate of one lifting frame in the front and a second limiting structure arranged on the guide plate of one lifting frame or the supporting bottom plate in the rear. A limiting channel is longitudinally arranged on the first limiting structure. The second limiting structure includes a second limiting member longitudinally arranged. The second limiting member can longitudinally extend into the limiting channel to be connected with the first limiting structure as each lifting frame rises, and longitudinally withdraw from the limiting channel to be separated from the first limiting structure as each lifting frame descends. The second limiting structure arranged on the guide plate of the lifting frame is connected to the front end of the first limiting structure on the same guide plate of the lifting frame.

[0016] The loading device for cargo delivery disclosed in the present invention includes a supporting bottom plate, a plurality of lifting frames arranged in sequence in front of the supporting bottom plate, and a cargo-carrying mechanism connected to the lower ends of the outermost lifting frames. The back plates of adjacent lifting frames are connected by at least one synchronous lifting mechanism. The synchronous lifting mechanism includes rolling members respectively arranged at the upper and lower ends of the back plates of each lifting frame located between the supporting bottom plate and the outermost lifting frame, and a synchronous belt sleeved outside the back plates along the rolling members. A front fixing member fixedly connected to the upper part of the back plate of one lifting frame in front is arranged at the front part of the synchronous belt. A rear fixing member fixedly connected to the lower part of one lifting frame or the supporting bottom plate in the rear is arranged at the rear part of the synchronous belt. A driving mechanism and at least one driving belt drivingly connected to the driving mechanism are arranged on the supporting bottom plate. A front fixing member fixedly connected to the upper part of the back plate of one lifting frame in front is arranged at the front part of the driving belt. The relative height position between the connection position of the synchronous belt on the rear fixing member and one lifting frame or the supporting bottom plate in the rear remains unchanged, so as to ensure that the synchronous belt on the lifting frame rotates relative to the lifting frame while rising or falling along with the lifting frame. The relative height position between the connection position of the synchronous belt on the front fixing member and one lifting frame in front remains unchanged, so as to drive the one lifting frame in front to change its height position along with the rotation of the synchronous belt. While the driving belt moves driven by the driving mechanism, it also drives one lifting frame in front of the supporting bottom plate and the synchronous belt arranged on the lifting frame to rise or fall through the front fixing member. Each adjacent pair of arranged lifting frames also rise or fall at the same speed as the rear lifting frame driven by the synchronous belt on the rear lifting frame in sequence through the front fixing member, so that all the lifting frames on the loading device can be simultaneously raised or lowered driven by the same driving mechanism, which is convenient for accurately regulating the total telescopic length and facilitating the acquisition or delivery of goods at different height positions. Since only one driving mechanism is provided to drive all the lifting frames to lift and lower, there is no need to configure multiple independent driving mechanisms, thus reducing the cost.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 The figure is a schematic diagram of the structure of a loading device disclosed in one embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of each lifting frame disclosed in an embodiment of the present invention.

[0021] Figure 3 It is a top view of the structure of each lifting frame disclosed in one embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the unfolded state of each lifting frame disclosed in an embodiment of the present invention.

[0023] Figure 5 It is a schematic structural diagram of a first lifting frame disclosed in an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the structural decomposition of a first lifting frame disclosed in one embodiment of the present invention.

[0025] Figure 7 The present invention is a schematic diagram of the structural decomposition of a synchronous belt, a front fixing member, a rear fixing member, a transition member, and a positioning member disclosed in an embodiment of the present invention.

[0026] Figure 8 The figure is a schematic diagram of the structure of a transfer component disclosed in one embodiment of the present invention.

[0027] Figure 9 The figure is a schematic structural diagram of a positioning member disclosed in an embodiment of the present invention.

[0028] Figures 10 - 11 It is a partial structural schematic diagram of a lifting frame disclosed in one embodiment of the present invention.

[0029] Figure 12 The figure is a schematic diagram of the structure of a rolling base disclosed in one embodiment of the present invention.

[0030] Figure 13 It is a structural rear view of a first lifting frame disclosed in one embodiment of the present invention.

[0031] Figure 14 It is a rear view of the structure of a second lifting frame disclosed in one embodiment of the present invention.

[0032] Figure 15 It is a structural rear view of a third lifting frame disclosed in one embodiment of the present invention.

[0033] Figure 16 The structural schematic diagram of the supporting bottom plate disclosed in an embodiment of the present invention.

[0034] Figure 17 The rear view of the structure of the supporting bottom plate disclosed in an embodiment of the present invention.

[0035] Figure 18 The exploded structural schematic diagram of the supporting bottom plate disclosed in an embodiment of the present invention.

[0036] Figure 19 The structural schematic of the blocking member disclosed in an embodiment of the present invention Figure One .

[0037] Figure 20 The structural schematic of the blocking member disclosed in an embodiment of the present invention Figure Two .

[0038] Figure 21 The structural schematic of the blocking member disclosed in an embodiment of the present invention Figure Three .

[0039] Figure 22 The structural schematic of the impact member disclosed in an embodiment of the present invention Figure One .

[0040] Figure 23 The structural schematic of the impact member disclosed in an embodiment of the present invention Figure Two .

[0041] Figure 24 The partial structural schematic diagram of each guide plate disclosed in an embodiment of the present invention.

[0042] Figure 25 The structural schematic diagram of the constraint assembly disclosed in an embodiment of the present invention.

[0043] Figure 26 The structural sectional view of the constraint assembly disclosed in an embodiment of the present invention.

[0044] Figure 27 The structural schematic of the second limiting structure disclosed in an embodiment of the present invention Figure One .

[0045] Figure 28 The structural schematic of the second limiting structure disclosed in an embodiment of the present invention Figure Two . Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0048] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0050] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the specification and claims of this patent application of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one.

[0051] Such as Figures 1 - 4As shown, as an embodiment of the present invention, a loading device for cargo delivery is disclosed, comprising a supporting base plate 1, a plurality of lifting frames 2 and a cargo loading mechanism 3, wherein the supporting base plate 1 is connected to an external cross beam support and can move in translation along the length direction of the external cross beam support, and a driving mechanism 4 and at least one driving belt 5 connected to the driving mechanism 4 are provided on the supporting base plate 1. In this embodiment, three lifting frames 2 are provided, namely, a first lifting frame 10, a second lifting frame 20 and a third lifting frame 30, and the three lifting frames 2 are sequentially arranged in front of the supporting base plate 1. In other embodiments, the lifting frames 2 can also be set to two, four or other numbers. The cargo loading mechanism 3 is connected to the lower end of the outermost third lifting frame 30, and is used for transporting and delivering cargo. The back plate 21 of the first lifting frame 10 is connected to the back plate 21 of the second lifting frame 20 through at least one synchronous lifting mechanism 6, and the back plate 21 of the second lifting frame 20 is connected to the back plate 21 of the third lifting frame 30 through at least one synchronous lifting mechanism 6. The synchronous lifting mechanism 6 includes rolling members 62 respectively arranged at the upper and lower ends of the back plates 21 of the first lifting frame 10 and the second lifting frame 20, and a synchronous belt 61 sleeved on the outside of the back plate 21 along the rolling members 62. The two ends of the synchronous belt 61 are respectively sleeved on the outside of the rolling members 62 at the upper and lower ends of the back plate 21. The back plate 21 is located inside the synchronous belt 61, and the synchronous belt 61 can rotate around the back plate 21 and the two rolling members 62 arranged at the upper and lower ends thereof. The front portion of the synchronous belt 61 on the first lifting frame 10 is provided with a front fixing piece 63 fixedly connected to the upper portion of the back plate 21 of the second lifting frame 20 in front thereof, the front portion of the synchronous belt 61 on the second lifting frame 20 is provided with a front fixing piece 63 fixedly connected to the upper portion of the back plate 21 of the third lifting frame 30 in front thereof, the front portion of the driving belt 4 is provided with a front fixing piece 63 fixedly connected to the upper portion of the back plate 21 of the first lifting frame 10 in front thereof, the rear portion of the synchronous belt 61 on the first lifting frame 10 is provided with a rear fixing piece 64 fixedly connected to the lower portion of the supporting base plate 1 behind it, and the rear portion of the synchronous belt 61 on the second lifting frame 20 is provided with a rear fixing piece 64 fixedly connected to the lower portion of the supporting base plate 1 behind it.The relative height position between the connection position of the synchronous belt 61 on the rear fixing member 64 and a lifting frame 2 or a supporting bottom plate 1 behind it remains unchanged, which is used to ensure that the synchronous belt on the lifting frame 2 rotates relative to the lifting frame 2 while rising or falling with the lifting frame 2. The relative height position between the connection position of the synchronous belt 61 on the front fixing member 63 and a lifting frame 2 in front of it remains unchanged, which is used to drive the height position of the front lifting frame 2 to change with the rotation of the synchronous belt 61. While the driving belt 5 moves driven by the driving mechanism 4, it also drives the first lifting frame 10 and the synchronous belt 61 arranged on the first lifting frame 10 to rise or fall through the front fixing member 63. At the same time, the synchronous belt 61 arranged on the first lifting frame 10 rotates relative to the first lifting frame 10 while the first lifting frame 10 rises or falls. The synchronous belt 61 arranged on the first lifting frame 10 drives the second lifting frame 20 and the synchronous belt 61 arranged on the second lifting frame 20 to rise or fall at the same speed as the first lifting frame 10 through the front fixing member 63. The synchronous belt 61 arranged on the second lifting frame 20 rotates relative to the second lifting frame 20 while the second lifting frame 20 rises or falls. The synchronous belt 61 arranged on the second lifting frame 20 drives the third lifting frame 30 and the synchronous belt 61 arranged on the second lifting frame 20 to rise or fall at the same speed as the second lifting frame 20 through the front fixing member 63. Furthermore, all the lifting frames 2 on the loading device can be simultaneously raised or lowered driven by the same driving mechanism 4, which is convenient for accurately regulating the total telescopic length and facilitating the acquisition or placement of goods at different height positions. Since only one driving mechanism 4 is set to drive all the lifting frames 2 to lift and lower, there is no need to configure multiple independent driving mechanisms, thus reducing the cost.

[0052] Such as Figures 3 - 7As shown in FIGS. 15 or 16, in some specific embodiments, the front fixing member 63 on the driving belt 5 is arranged as a plate structure fixedly connected to the inner side of the front part of the driving belt 5, and the front fixing member 63 on the timing belt 61 is arranged as a plate structure fixedly connected to the inner side of the front part of the timing belt 61, and is fixedly connected to the upper part of a lifting frame back plate 21 in front of it through an adapter 65. The adapter 65 includes a vertical adapter plate 651 arranged on the outer side of the front part of the driving belt 5 or the timing belt 61. The front fixing member 63 is arranged vertically, and the vertical adapter plate 651 is fixedly connected to the front fixing member 63. The rear fixing member 64 on the timing belt 61 is arranged as a plate structure fixedly connected to the inner side of the rear part of the timing belt 61, and is fixedly connected to the lower part of a lifting frame 2 or a supporting bottom plate 1 behind it through a positioning member 66. The positioning member 66 includes a vertical positioning plate 661 arranged on the outer side of the rear part of the timing belt 61. The rear fixing member 64 is arranged vertically, and the vertical positioning plate 661 is fixedly connected to the rear fixing member 64. In this embodiment, since the driving belt 5 and the timing belt 61 are flat belt structures, the front fixing member 63 and the vertical adapter plate 651 clamp the inner and outer sides of the front part of the timing belt 61 or the driving belt 5, and the rear fixing member 64 and the vertical positioning plate 661 clamp the inner and outer sides of the rear part of the timing belt 61. The design of the plate structure has a large contact area with the driving belt 5 and the timing belt 61, good connection stability, and each plate structure is arranged longitudinally, occupying a relatively narrow lateral space. Therefore, the interval between the lifting frames 2 can be set to be relatively narrow, the structure is more compact, the stability is better, and the load-bearing capacity is stronger.

[0053] As Figures 7 - 9As shown, in some specific embodiments, the front end face of the front fixing member 63 is provided with a plurality of front raised horizontal bars 631, and the rear end face of the rear fixing member 64 is provided with a plurality of rear raised horizontal bars 641, so as to further increase the contact area between the front fixing member 63 and the inner side face of the synchronous belt 61 or the driving belt 5, and the contact area between the rear fixing member 64 and the inner side face of the synchronous belt 61, thereby improving the stability of the connection. The rear end of the vertical adapter plate 651 is recessed forward and has a vertical adapter groove 6511 for accommodating the synchronous belt 61 or the driving belt 5, and the front-to-rear width of the vertical adapter groove 6511 is smaller than the thickness of the synchronous belt 61 or the driving belt 5. The front end of the vertical positioning plate 661 is recessed backward and has a vertical positioning groove 6611 for accommodating the synchronous belt 61, and the front-to-rear width of the vertical positioning groove 6611 is smaller than the thickness of the synchronous belt 61, so that the synchronous belt 61 or the driving belt 5 can be limited in the vertical adapter groove 6511, and the synchronous belt 61 can be limited in the vertical positioning groove 6611, which is convenient for precise assembly, prevents the synchronous belt 61 or the driving belt 5 from tilting left and right, and ensures the smooth lifting movement of the lifting frame 2. The front fixing member 63 is provided with front connecting holes 632 on both sides along the front-to-back direction, the vertical adapter plate 651 is provided with adapter holes 6512 corresponding to the front connecting holes 632 on both sides along the front-to-back direction, the vertical adapter groove 6511 is arranged between the adapter holes 6512 on both sides, the rear fixing member 64 is provided with rear connecting holes 642 on both sides along the front-to-back direction, the vertical positioning plate 661 is provided with positioning holes 6612 corresponding to the rear connecting holes 642 on both sides along the front-to-back direction, the vertical positioning groove 6611 is arranged between the positioning holes 6612 on both sides, the front fixing member 63 is fixedly connected to the vertical adapter plate 651 by fasteners such as bolts passing through the front connecting hole 632 and the adapter hole 6512, the rear fixing member 64 is fixedly connected to the vertical positioning plate 661 by fasteners such as bolts passing through the rear connecting hole 642 and the positioning hole 6612, so as to facilitate loading and unloading.

[0054] In some specific embodiments, the adapter 65 also includes a horizontal adapter plate 652 connected to the front end of the vertical adapter plate 651. A horizontal docking plate 211 is provided on the upper part of a lifting frame back plate 21 in front of the adapter 65, extending backward. The horizontal adapter plate 652 is stacked on the upper side of the horizontal docking plate 211. The bottom surface of the horizontal adapter plate 652 abuts against the top surface of the horizontal docking plate 211. The horizontal docking plate 211 supports the horizontal adapter plate 652. Connection holes 6521 are longitudinally provided on both sides of the horizontal adapter plate 652. The horizontal docking plate 211 is longitudinally provided with docking holes 2111 corresponding to the connection holes 6521. The horizontal adapter plate 652 is fixedly connected to the horizontal docking plate 211 by fasteners such as bolts that penetrate the connection holes 6521 and the docking holes 2111, which is convenient for loading and unloading. Figure 13As shown in Fig. 15, as an embodiment of the horizontal docking plate 211, the horizontal docking plate 211 and the lifting frame back plate 21 are set as an integral structure, with a solid and firm structure, strong load-bearing capacity and anti-torsion performance; as Figure 14 shown, as another embodiment of the horizontal docking plate 211, a vertical docking plate 212 is fixedly connected to the front end of the horizontal docking plate 211, and a mounting hole fixedly connected to the rear part of the lifting frame back plate 21 is horizontally penetrated through the vertical docking plate 212, which is convenient for separate replacement and maintenance. The positioning member 66 further includes a positioning connection portion 662 connected to the vertical positioning plate 661, and the positioning connection portion 662 is fixedly connected to the lower part of a lifting frame 2 or the supporting bottom plate 1 behind it. The positioning connection portion 662 and the vertical positioning plate 661 are set as an integral structure, with a solid and firm structure and strong anti-torsion performance. The bottom surface of the horizontal docking plate 211 near the upper rolling member 62 of the lifting frame 2 behind it is arranged obliquely below the upper rolling member of the rear lifting frame, and the top surface of the positioning member 66 near the lower rolling member 62 of the lifting frame 2 in front of it is arranged obliquely above the lower rolling member of the front lifting frame, so that the horizontal docking plate 211 and the positioning member 66 are respectively arranged as close as possible to the upper and lower ends of the synchronous belt 61, which is beneficial to maximizing the total telescopic length of each lifting frame. The horizontal transfer plate 652 is arranged at the upper end of the front end of the vertical transfer plate 651, and the horizontal transfer plate 652 and the vertical transfer plate 651 are set as an integral structure, which is firm and solid, with strong load-bearing capacity and anti-torsion performance.

[0055] As Figures 16 - 18As shown, in some specific embodiments, an installation substrate 11 is arranged at the front part of the supporting bottom plate 1 and is arranged in parallel and spaced apart from the supporting bottom plate. Rolling members 62 with the same number as the driving belts 5 are respectively arranged at the upper and lower ends of the installation substrate 11. A traction wheel 12 and a transmission wheel 13 with the same number as the driving belts 5 are arranged at the rear part of the supporting bottom plate 1. The transmission wheels 13 are fixedly connected through a wheel shaft 14. One of the transmission wheels 13 is in transmission connection with the driving mechanism 4. The transmission wheels 13 rotate synchronously under the drive of the wheel shaft 14, so that one driving mechanism 4 can drive multiple driving belts 5 to rotate synchronously. Multiple driving belts 5 can be set, which improves the stable connection between the driving belts 5 and the first lifting frame 10, reduces the lateral shaking, collision or pulling between them, and ensures the stability of the entire loading device. The transmission wheel 13 and the rolling member 62 at the lower end of the installation substrate 11 are arranged on the same plane. The traction wheel 12 is arranged obliquely above the transmission wheel 13 and its front end protrudes from the front part of the supporting bottom plate 1 through a transmission channel 15 penetrating through the lower part of the supporting bottom plate 1. The driving belt 5 is sleeved outside the installation substrate 11 along the transmission wheel 13 and the two rolling members 62. The upper and lower ends of the driving belt 5 are respectively sleeved on the outer sides of the rolling members 62 at the upper and lower ends of the installation substrate 11, and the rear end is sleeved on the outer side of the transmission wheel 13. The outer side of the driving belt 5 abuts against the front wall and the bottom wall of the traction wheel 12. The traction wheel 12 is used to prevent the driving belt 5 from rubbing against the supporting bottom plate 1 and affecting the lifting effect. The installation substrate 11 is located inside the driving belt 5, and the driving belt 5 can rotate around the transmission wheel 13, the installation substrate 11 and the rolling members 62 arranged at the upper and lower ends of the installation substrate 11. A driving base 16 for installing the driving mechanism 4 and a transmission base 17 for installing the wheel shaft 14 are arranged at the lower end of the rear part of the supporting bottom plate 1. The wheel shaft 14 is rotatably connected to the transmission base 17 through a bearing. The transmission wheel 13 is fixedly installed on the wheel shaft 14. The central axes of the output shaft of the driving mechanism 4, the wheel shaft 14 and the transmission wheel 13 are arranged on the same straight line parallel to the supporting bottom plate. The transmission channel 15 is recessed upward from the lower end surface of the supporting bottom plate 1, which is convenient for assembly. In some other embodiments, the transmission channel 15 can also be arranged at other positions at the lower part of the supporting bottom plate 1. The installation substrate 11 includes an installation upper plate 111 arranged close to the upper end of the supporting bottom plate 1 and an installation lower plate 112 arranged close to the lower end of the supporting bottom plate 1, which saves materials and is convenient for ventilation, heat dissipation, loading and unloading. The rolling members 62 at the upper end of the installation substrate 11 are arranged at the upper end of the installation upper plate 111, and the rolling members 62 at the lower end of the installation substrate 11 are arranged at the lower end of the installation lower plate 112. In some other embodiments, the installation substrate 11 can also be set as a whole plate to enhance the structural stability. Each rolling member 62 is set as a driven wheel. Limiting edges are respectively protruded along the circumferential direction on both sides of each rolling member 62, the traction wheel 12 and the transmission wheel 13, which are used to prevent the synchronous belt 61 or the driving belt 5 from disconnecting.

[0056] As Figure 1 , 2As shown, in some specific embodiments, at least one anti-falling component 7 is provided between the back plates 21 of adjacent lifting frames 2. The anti-falling component 7 includes a blocking member 71 arranged in the middle or lower part of the back plate 21 of a rear lifting frame, an impact member 72 arranged in the upper part of the back plate 21 of a front lifting frame, and a flexible member 73 arranged above the blocking member 71. The flexible member 73 is made of a soft material such as soft rubber. When each lifting frame 2 descends to the maximum descending height, the bottom of the impact member 72 on the lifting frame 2 can abut against the top of the flexible member on a rear lifting frame 2 of the lifting frame 2, so as to limit the telescopic length between each other and prevent the front lifting frame 2 from being disconnected from the rear lifting frame 2, resulting in a falling risk. The flexible member 73 is arranged above the blocking member 71, and can also provide a buffering force for the impact of the impact member 72 on the blocking member 71 when each lifting frame 2 descends rapidly, avoiding noise pollution caused by rigid collision, reducing the package replacement rate of goods, and being conducive to the stable placement of goods.

[0057] In some specific embodiments, a fastening hole is longitudinally penetrated through the flexible member 73, and is fixedly connected to the blocking member 71 through fasteners such as bolts passing through the fastening hole and the blocking member 71, which is convenient for loading and unloading. As Figure 19 shown, as an embodiment of the blocking member 71, the blocking member 71 includes a blocking mounting plate 711 and a blocking plate 712 protruding forward from the front part of the blocking mounting plate 711. A fastening hole for fixedly connecting with the back plate 21 of the lifting frame is horizontally penetrated through the blocking mounting plate 711, and a fastening hole for fixedly connecting with the flexible member 73 is longitudinally arranged on the blocking plate 712. After installation, the blocking mounting plate 711 is located at the front part of the back plate 21 of the lifting frame, and the rear end face of the blocking mounting plate 711 abuts against the front end face of the back plate 21 of the lifting frame. The bottom surface of the flexible member 73 abuts against the top surface of the blocking plate 712, which is convenient for loading and unloading the blocking member 71 and the flexible member 73 from the front of the back plate 21 of the lifting frame. The blocking member 71 in this embodiment further includes a blocking reinforcing plate 713. The upper end face of the blocking reinforcing plate 713 is fixedly connected to the bottom surface of the blocking plate 712, and the rear end face of the blocking reinforcing plate 713 is fixedly connected to the front end face of the blocking mounting plate 711 to enhance the impact resistance. The blocking plate 712 is arranged at the upper end of the front part of the blocking mounting plate 711, the blocking reinforcing plate 713 is vertically arranged along the middle of the blocking plate 712, the blocking plate 712 is fixedly connected to the flexible member 73 through fasteners such as bolts arranged on both sides of the blocking reinforcing plate 713, and the blocking mounting plate 711 is fixedly connected to the back plate 21 of the lifting frame through fasteners such as bolts arranged on the left and right sides of the blocking reinforcing plate 713, and the structure has good stability.

[0058] As Figure 20As shown, as another embodiment of the blocking member 71, the blocking member 71 includes a blocking mounting plate 711, a blocking plate 712, and a blocking connecting plate 714 for connecting the blocking mounting plate 711 and the blocking plate 712. A fastening hole for fixedly connecting with the back plate 21 of the lifting frame is transversely penetrated on the blocking mounting plate 711. A fastening hole for fixedly connecting with the flexible member 73 is longitudinally arranged on the blocking plate 712. The length direction of the blocking mounting plate 711 is arranged longitudinally, and the length direction of the blocking plate 712 is arranged transversely. The blocking connecting plate 714 is arranged in the middle of the blocking mounting plate 711. The blocking mounting plate 711 is fixedly connected with the back plate 21 of the lifting frame through fasteners such as bolts arranged on both the upper and lower sides of the connecting plate 714, and the structure has good stability. After installation, the blocking mounting plate 711 is located in the front of the back plate 21 of the lifting frame, and the rear end face of the blocking mounting plate 711 abuts against the front end face of the back plate 21 of the lifting frame. The bottom surface of the flexible member 73 abuts against the top surface of the blocking plate 712, which is convenient for loading and unloading the blocking member 71 and the flexible member 73 from the front of the back plate 21 of the lifting frame. The front end face of the blocking mounting plate 711 is fixedly connected with one end in the length direction of the rear end face of the blocking plate 712, and it is suitable for being installed close to the synchronous belt 61 or the driving belt 5. A part of the edge of the synchronous belt 61 or the driving belt 5 can be arranged in the rear area at the other end in the length direction of the blocking plate 712, which is beneficial to the compact layout of the overall structure of the loading device.

[0059] As Figure 21 shown, as another embodiment of the blocking member 71, the blocking member 71 and the positioning member 66 are set as an integral structure and are directly formed by the positioning member 66 without setting a separate blocking member 71, thus simplifying the structure. A fastening hole for fixedly connecting with the flexible member 73 is longitudinally arranged at the upper end of the positioning member 66.

[0060] In some specific embodiments, the impact member 72 includes an impact mounting plate 721 and an impact block 722 protruding backward from the rear of the impact mounting plate 721. An impact channel 213 through which the impact block 722 can pass is transversely penetrated in the upper part of the back plate 21 of the lifting frame. A fastening hole for fixedly connecting with the back plate 21 of the lifting frame is transversely penetrated on the impact mounting plate 721. After installation, the impact mounting plate 721 is located in the front of the back plate 21 of the lifting frame, and the rear end face of the impact mounting plate 721 abuts against the front end face of the back plate 21 of the lifting frame. The impact block 722 passes through the impact channel 213 and protrudes from the rear of the back plate 21 of the lifting frame, which is convenient for loading and unloading the impact member 72 from the front of the back plate 21 of the lifting frame. As Figure 22 shown, as an embodiment of the impact member 72, the length direction of the impact mounting plate 721 is arranged longitudinally, and the impact block 722 is arranged at the upper end of the rear part of the impact mounting plate 721, or the impact block 722 is arranged at the lower end of the rear part of the impact mounting plate 721; as Figure 23As shown, as another embodiment of the impact member 72, the length direction of the impact mounting plate 721 is arranged transversely, and the impact block 722 is provided at one end of the rear length direction of the impact mounting plate 721. The above provides various impact blocks 722 with different structures, which are applicable to installation areas with various spatial layouts.

[0061] As Figure 6 , 12 , as shown in Figure 18, in some specific embodiments, the rolling member 62 is fixed on the lifting frame back plate 21 or the mounting substrate 11 through the rolling base 67. The rolling base 67 at the upper end of the lifting frame back plate 21 is fixedly connected to the front of the back plate 21, which is convenient for loading, unloading or adjusting the rolling base 67 at the upper end of the lifting frame back plate 21 from the front of the lifting frame back plate 21 when each lifting frame 2 is in the lowered unfolded state. The rolling base 67 at the lower end of the lifting frame back plate 21 is fixedly connected to the rear of the back plate 21, which is convenient for loading, unloading or adjusting the rolling base 67 at the lower end of the lifting frame back plate 21 from the rear of the lifting frame back plate 21 when each lifting frame 2 is in the lowered unfolded state. The rolling bases 67 at the upper and lower ends of the mounting substrate 11 are fixedly connected to the front of the mounting substrate 11, which is convenient for the installation and adjustment of the rolling base 67.

[0062] As Figure 12 shown, in some specific embodiments, the rolling base 67 includes a seat plate 671 longitudinally movably connected to the back plate 21 or the mounting substrate 11, and shaft plates 672 and adjusting plates 673 respectively arranged at the upper and lower ends of the seat plate 671. The shaft plate 672 is arranged on one side of the seat plate 671 close to the back plate 21 or the mounting substrate 11, and is arranged directly above or directly below the back plate 21 or the mounting substrate 11. The shaft plate 672 is provided with a shaft hole 6721 for installing the rolling shaft 621 of the rolling member 62. The two ends of the rolling shaft 621 are respectively installed in the shaft holes 6721 of the two rolling bases 67. The length direction of the shaft hole 6721 is in the same vertical plane as the back plate 21 or the mounting substrate 11, ensuring that the rolling member 62 is arranged directly above or directly below the back plate 21 or the mounting substrate 11, with good connection stability, and can also prevent the synchronous belt 61 sleeved on the rolling member 62 from rubbing against the back plate 21 or the driving belt 5 on the rolling member 62 from rubbing against the mounting substrate 11. The adjusting plate 673 is arranged on one side of the seat plate 671 far from the back plate 21 or the mounting substrate 11 and abuts against the convex member 68 on the back plate 21 or the mounting substrate 11 through the vertical adjusting member 674. The relative distance between the adjusting plate 673 and the convex member 68 can be changed by adjusting the vertical adjusting member 674, so as to change the relative distance between the upper and lower rolling bases 67, and further change the relative distance between the rolling members 62 installed on the upper and lower rolling bases 67, achieving the effect of adjusting the pre-tightening force of the synchronous belt 61 or the driving belt 5.

[0063] In some specific embodiments, the vertical adjustment member 674 is connected to the adjustment plate 673 in the longitudinal direction, one end of the vertical adjustment member 674 is in contact with the protruding member 68, and the other end is used for adjustment operation. The seat plate 671 is provided with a movable channel 6711 running through the longitudinal direction, and two transverse adjustment members 675 arranged up and down are provided in the movable channel 6711. The transverse adjustment member 675 is connected to the back plate 21 in the transverse direction, and a retaining ring 676 is provided on the transverse adjustment member 675. After installation, the inner and outer sides of the seat plate 671 are respectively in contact with the back plate 21 and the retaining ring 676. When the relative distance between the adjustment plate 673 and the protruding member 68 changes, the transverse adjustment member 675 moves up and down along the movable channel 6711. The transverse adjustment member 675 and the vertical adjustment member 674 are arranged in different vertical planes perpendicular to the back plate 21 or the mounting base plate 11, and the structural arrangement is compact. The vertical adjustment member 674 and the transverse adjustment member 675 are provided with fasteners such as bolts, which have a simple and practical structure and are easy to adjust. Figure 10 As shown in FIG. 1 , as an embodiment of the protrusion 68, the protrusion 68 is configured as a plate structure integrally formed with the back plate 21 or the mounting substrate 11. Figure 11 As shown, as another embodiment of the protrusion 68 , the protrusion 68 is configured as a block structure that can be detachably connected to the back plate 21 or the mounting substrate 11 .

[0064] like Figure 15As shown, in some specific embodiments, the upper end of the back plate 21 of the outermost third lifting frame 30 is recessed downward to form a first groove 214. The top surface of the horizontal docking plate 211 on the back plate 21 of the third lifting frame 30 is flush with the bottom wall of the first groove 214 and abuts against the bottom surface of the horizontal transfer plate 652 at the same time, enhancing the stability of the connection between the horizontal transfer plate 652 and the third lifting frame 30, improving the stability of the overall structure of the loading device, having strong anti-torsion performance, and being beneficial to the smooth lifting of each lifting frame 2. The upper and lower ends of the back plates 21 of the first lifting frame 10 and the second lifting frame 20 between the supporting bottom plate 1 and the outermost third lifting frame 30 are respectively recessed inward to form mounting grooves 215 for accommodating the rolling elements 62, so that all or part of the structures of the rolling elements 62 at the upper and lower ends are located in the mounting grooves 215, thereby being able to better limit and protect the rolling elements 62. The upper ends of the back plates 21 of the first lifting frame 10 and the second lifting frame 20 between the supporting bottom plate 1 and the outermost third lifting frame 30 are recessed inward to form base grooves 216 for accommodating the rolling bases 67, so that all or part of the structures of the rolling bases 67 at the upper ends are located in the base grooves 216, thereby being able to better limit and protect the rolling bases 67 at the upper ends. And the base groove 216 is located at the outer end of the mounting groove 215 and is communicated with the mounting groove 215. The width of the base groove 216 is greater than the width of the mounting groove 215, and the structure is simple. The lower ends of the back plates 21 of the first lifting frame 10 and the second lifting frame 20 between the supporting bottom plate 1 and the outermost third lifting frame 30 are arranged near the lower end of the overall lifting frame 2 and are higher than the lower end of the overall lifting frame 2, so that all or part of the structures of the lower rolling bases 67 are located in the space between the lower end of the back plate 21 and the lower end of the overall lifting frame 2, thereby being able to better protect the rolling bases 67. The upper end of the mounting upper plate 111 is recessed inward to form a mounting groove 215 for accommodating the upper rolling elements 62, and the lower end of the mounting lower plate 112 is recessed inward to form a mounting groove 215 for accommodating the lower rolling elements 62, so that all or part of the structures of the rolling elements 62 at the upper and lower ends are located in the mounting grooves 215, thereby being able to better limit and protect the rolling elements 62. The upper end of the mounting upper plate 111 is lower than the upper end of the supporting bottom plate 1, so that all or part of the structures of the upper rolling bases 67 are located in the space between the upper end of the mounting substrate 11 and the upper end of the supporting bottom plate 1. The lower end of the mounting lower plate 112 is higher than the lower end of the supporting bottom plate 1, so that all or part of the structures of the lower rolling bases 67 are located in the space between the lower end of the mounting substrate 11 and the lower end of the supporting bottom plate 1, thereby being able to better protect the rolling bases 67.

[0065] In some specific embodiments, the lower end of the back plate 21 of the third lifting frame 30 is recessed upwards and is provided with a connection groove 217 for connecting the cargo loading mechanism 3, which can reduce the shaking of the cargo loading mechanism 3 and ensure the smooth transportation of the loading device. The back plate 21 of the third lifting frame 30 is provided with a front connection plate 218 protruding forward and a rear connection plate 219 protruding backward. The bottom surfaces of the front connection plate 218 and the rear connection plate 219 are flush with the top wall of the connection groove 217 and together form a connection platform for connecting with the cargo loading mechanism 3. The cargo loading mechanism 3 is connected to the lower side of the connection platform.

[0066] like Figures 1 - 4 As shown, in some specific embodiments, two driving belts 5 are arranged on the mounting base plate 11, two synchronous belts 61 are arranged on the back plate 21 of the first lifting frame 10, and one synchronous belt 61 is arranged on the back plate 21 of the second lifting frame 20. In other embodiments, the driving belts 5 or the synchronous belts 61 may also be set to other numbers. The front fixing members 63 on the two driving belts 5 are fixedly connected to the same adapter 65, and the horizontal adapter 652 in the adapter 65 is arranged at the middle position of the vertical adapter plate 651 and located between the two synchronous belts 61 on the first lifting frame 10. The corresponding horizontal docking plate 211 on the back plate 21 of the first lifting frame 10 is also arranged between the two synchronous belts 61 on the first lifting frame 10. The rear fixing members 64 on the two synchronous belts 61 on the first lifting frame 10 are fixedly connected to the two positioning members 66 respectively, and the positioning connection parts 662 in the two positioning members 66 are arranged on the outside of the two driving belts 5. The front fixing members 63 on the two synchronous belts 61 on the first lifting frame 10 are fixedly connected to the two adapters 65 respectively, and the two adapters 65 are arranged on both sides of the synchronous belt 61 on the second lifting frame 20, and the corresponding horizontal docking plates 211 on the back plate 21 of the second lifting frame 20 are also arranged on both sides of the synchronous belt 61 on the second lifting frame 20. The positioning member 66 fixedly connected to the rear fixing member 64 on the synchronous belt 61 on the second lifting frame 20 is arranged between the two synchronous belts 61 on the first lifting frame 10, and the first groove 214 is set in the middle position of the upper part of the back plate 21 of the third lifting frame 30. The front fixing member 63 on the synchronous belt 61 on the second lifting frame 20 is fixedly connected to the middle position of the upper part of the back plate 21 of the third lifting frame 30. In this embodiment, the entire spatial structure is compactly arranged and does not interfere with each other.

[0067] like Figure 17As shown, in some specific embodiments, two spaced-apart drive bases 17 are provided at the lower end of the rear part of the supporting base plate 1. The drive base 16 is also provided at the lower end of the rear part of the supporting base plate 1 and is spaced apart from the drive bases 17. One of the two drive wheels 13 is arranged between the two drive bases 17 and is mounted on the two drive bases 17 through the axles 14 provided on both sides of the drive wheel 13; the other of the two drive wheels 13 is arranged between the drive base 17 and the drive base 16, and is mounted on the drive base 17 through the axle 14 on one side and on the drive base 16 through the drive mechanism 4 on the other side.

[0068] As Figures 2 - 4 As shown, in some specific embodiments, guide plates 22 protruding forward are respectively arranged longitudinally on both sides of the supporting base plate 1 and the back plates 21 of the first lifting frame 10 and the second lifting frame 20 located between the supporting base plate 1 and the outermost third lifting frame 30. The synchronous belt 61 is arranged between the two guide plates 22. Moving plates 23 protruding backward are respectively arranged longitudinally on both sides of the back plates 21 of the first lifting frame 10, the second lifting frame 20, and the third lifting frame 30. The positioning connection part 662 in the positioning part 66 fixedly connected to the rear fixing part 64 on the synchronous belt 61 of the first lifting frame 10 is fixedly connected to the front end of the guide plate 22 on the supporting base plate 1. A guiding mechanism 8 is provided between the guide plates 22 and the moving plates 23 of adjacent lifting frames 2 and the supporting base plate 1. The guiding mechanism 8 includes a rail structure 81 arranged longitudinally on the outer side of the guide plate 22 and a moving component 82 arranged on the inner side of the moving plate 23. Adjacent lifting frames 2 and the supporting base plate 1 are movably connected through the moving component 82 and the rail structure 81 and can move along the length direction of the rail structure 81. The structure is simple and practical, and the assembly is convenient. Since the lifting frames 2 are arranged in layers in front of the supporting base plate 1 in sequence, the size of each lifting frame 2 is not limited by adjacent lifting frames 2 or the supporting base plate 1, and there is a relatively free space layout range, which is convenient for the structural design and assembly of the product. Guide plates 22, moving plates 23, and guiding mechanisms 8 are provided on both sides, which can prevent adjacent lifting frames 2 and the supporting base plate 1 from relatively swaying horizontally between the two sides. The connection stability is strong and the guiding smoothness is good. At the same time, the total lifting height range of all the lifting frames 2 can be extended or shortened by increasing or decreasing the number of the intermediate first lifting frame 10 or second lifting frame 20 as needed, and the application range is wide. In addition, the setting of the guide plate 22 and the moving plate 23 makes the overall front-back width of the lifting frame 2 greater than the front-back width of the back plate 21, reserving sufficient layout space for the drive belt 5, the synchronous belt 61, the upper and lower end rolling parts 62, the front fixing part 63, the rear fixing part 64, the adapter part 65, the positioning part 66, etc. The two guide plates 22 on the supporting base plate 1 are respectively fixedly connected to both sides of the mounting substrate 11, and the structure is firm and solid.

[0069] AsFigure 3 As shown, in some specific embodiments, the moving plate 23 on the lifting frame 2 is connected to the side end of the back plate 21 of the lifting frame 2, and the guide plate 22 on the lifting frame 2 is connected to a position near the side end at the front of the back plate 21 of the lifting frame 2. The structural design is ingenious, which not only expands the layout area of the synchronous lifting mechanism 6, but also facilitates the assembly of the guiding mechanism 8, and has strong connection stability and good guiding smoothness. An installation area for arranging the guiding mechanism 8 and the adjacent moving plate 23 is formed by enclosing the outside of the guide plate 22 and the front part of the back plate 21 of the lifting frame. The outer sides of the adjacent moving plates 23 are located in the same vertical plane, and the outer sides of the adjacent guide plates 22 are located in the same vertical plane, so that the widths of the arranged lifting frames 2 are the same, the overall structure of the loading device is stable, and the structures and sizes of the intermediate arranged first lifting frame 10 and second lifting frame 20 are the same, which is beneficial to freely increasing or decreasing the number of intermediate lifting frames 2 as needed.

[0070] As Figure 2 shown in FIG. 17 or 18, in some specific embodiments, the guide plate 22 on the supporting bottom plate 1 is connected to the side end of the mounting substrate 11 and is located at a position near the side end of the supporting bottom plate 1 at the front of the supporting bottom plate 1. Lifting chain troughs 18 and lifting detection members 19 are respectively arranged on both sides of the supporting bottom plate 1. The front part of the lifting chain trough 18 is connected to the side part of the outermost third lifting frame 30 through a front bracket, and the rear part is connected to the side part of the supporting bottom plate 1 through a rear bracket, and is used for storing and arranging each wire on the loading device. A detection response member 191 is arranged on the outside of the moving plate 23 connected to one of the guide plates 22 arranged near the lifting detection member 19 on the supporting bottom plate 1, and is used to accurately judge whether each lifting frame 2 is in a completely retracted state. In this embodiment, the lifting detection member 19 is set as a proximity sensor, and the lifting detection member 19 is installed on the side end of the supporting bottom plate 1 through a detection mounting plate 192. The rear part of the detection mounting plate 192 is fixedly connected to the side end face of the supporting bottom plate 1, and a mounting hole for installing the lifting detection member 19 is arranged through the front part of the detection mounting plate 192 along the horizontal direction parallel to the supporting bottom plate 1; the detection response member 191 is set as a Z-shaped induction plate, and the detection response member 191 includes a response mounting plate and an induction plate arranged parallel to the moving plate 23. The induction plate and the mounting plate are connected through a response connecting plate arranged perpendicular to the moving plate 23. The rear end of the response mounting plate is fixedly connected to the inner end of the response connecting plate, and the front end of the induction plate is fixedly connected to the outer end of the response connecting plate. When each lifting frame 2 is in a retracted state, the induction plates are arranged in parallel at intervals on the inner side of the front part of the detection mounting plate 192, which is convenient for responding to the detection signal of the lifting detection member 19.

[0071] As Figure 3As shown, in some specific embodiments, the moving assembly 82 includes a first roller 821 rollingly connected to the front of the guide rail structure 81 and a second roller 822 rollingly connected to the rear of the guide rail structure 81, and the front and rear of the guide rail structure 81 are clamped between the first roller 821 and the second roller 822. While having a lifting and lowering guide function, the adjacent lifting frame 2 and the supporting base plate 1 are firmly connected together to prevent relative lateral shaking along the vertical direction of the supporting base plate 1, which is conducive to smooth transportation. One of the first roller 821 and the second roller 822 is set as a concentric roller, and the other is set as an eccentric roller. The preload force between the moving assembly 82 and the guide rail structure 81 can be adjusted by adjusting the relative distance between the eccentric roller and the guide rail structure 81 to meet different work requirements.

[0072] like Figures 24 - 26 As shown, in some specific embodiments, a constraint assembly 9 is arranged between the lower ends of the guide plates 22 on the adjacent lifting frames 2 and the supporting bottom plate 1, and the constraint assembly 9 includes a first limiting structure 91 respectively arranged on the guide plate 22 of the front lifting frame 2 and a second limiting structure 92 arranged on the guide plate 22 of the rear lifting frame 2 or the supporting bottom plate 1, and a limiting channel 9121 is arranged longitudinally on the first limiting structure 91, and the second limiting structure 92 includes a second limiting member 922 arranged longitudinally. The second limiting member 922 can be longitudinally extended into the limiting channel 9121 and connected to the first limiting structure 91 as each lifting frame 2 rises, thereby constraining the relative lateral movement of the adjacent lifting frames 2 and the supporting bottom plate 1 after they are folded, preventing the adjacent lifting frames 2 and the supporting bottom plate 1 from moving away from each other laterally, and reducing the shaking or collision between each other, thereby improving the stability of the structure between each lifting frame 2 and the supporting bottom plate 1, and ensuring smooth transportation. The second limiting member 922 can be longitudinally withdrawn to the outside of the limiting channel 9121 and separated from the first limiting structure 91 as each lifting frame 2 descends, thereby ensuring the normal lifting movement of the lifting frame 2. Since the second limiting member 922 can be directly connected to or separated from the corresponding first connecting structure 91 as the lifting frame 2 moves, there is no need to perform separate operations, which is very convenient, efficient and time-saving to use.

[0073] In some specific embodiments, the first limiting structure 91 includes a first connecting plate 911 connected to a guide plate 22 of a front lifting frame 2 and a second connecting plate 912 connected to the first connecting plate 911 through a third connecting plate 913. Among them, the first connecting plate 911 and the second connecting plate 912 are horizontally arranged, the third connecting plate 913 is vertically arranged, the first connecting plate 911 is fixedly connected to the front part of the upper end of the third connecting plate 913, and the second connecting plate 912 is fixedly connected to the rear part of the lower end of the third connecting plate 913, forming a Z-shaped plate structure. The limiting channel 9121 is arranged through the second connecting plate 912, so there is no fixed requirement for the length of the second limiting member 922. The length of the second limiting member 922 can be set to be greater than the thickness of the second connecting plate 912, and the whole extends into the limiting channel 9121. The connection reliability is good, it is not easy to break away from the connection, and the structure is simple, which is convenient for production and processing. The second limiting structure 92 includes a second connecting member 921 connected to a guide plate 22 of an adjacent rear lifting frame 2. As Figure 27 shown, as an embodiment of the second limiting structure 92, the second connecting member 921 on the lifting frame 2 is horizontally arranged along the parallel direction of the back plate 21. The upper end of the second limiting member 922 is fixedly connected to the middle of the bottom of the second connecting member 921, forming a T-shaped plate structure. The structure is strong and durable, and has strong anti-torsion performance. It is arranged in the adjacent constraint assembly 9 between the lower ends of the guide plates 22 of each lifting frame 2. The second connecting plate 912 of the front constraint assembly 9 is arranged in parallel and at intervals below the first connecting plate 911 of the rear constraint assembly 9. When each lifting frame 2 is in the retracted state, the first connecting plates 911 of each adjacent constraint assembly 9 are on the same horizontal plane, and the second connecting plates 912 are on the same horizontal plane, so that each adjacent constraint assembly 9 is fitted and arranged, which is convenient for increasing or decreasing the number of constraint assemblies 9. In this embodiment, the second limiting structure 92 arranged on the guide plate 22 of the lifting frame 2 is connected to the front end of the first limiting structure 91 on the same guide plate 22 of the lifting frame 2, so that the second limiting structure 92 of the front constraint assembly 9 is connected to the guide plate 22 on the rear lifting frame 2 through the first limiting structure 91 of the rear constraint assembly 9. Each adjacent constraint assembly 9 is combined into a whole, and the design is simple and ingenious. As Figure 28 shown, as another embodiment of the second limiting structure 92, the second connecting member 921 on the supporting bottom plate 1 is horizontally arranged along the vertical direction of the supporting bottom plate 1. The upper end of the second limiting member 922 is fixedly connected to the front end of the second connecting member 921, forming an L-shaped plate structure. The structure is strong and durable, and has strong anti-torsion performance.

[0074] As Figure 26As shown, in some specific embodiments, after the second limiting member 922 extends into the limiting channel 9121, there is a movable gap between the outer wall of the second limiting member 922 and the plane where the peripheral wall of the limiting channel 9121 is located. The width between the front and rear walls of the second limiting member 922 is smaller than the width between the front and rear walls of the limiting channel 9121, and the width between the left and right walls of the second limiting member 922 is smaller than the width between the left and right walls of the limiting channel 9121, reserving sufficient moving space for the lateral movement of the second limiting member 922 in the limiting channel 9121. The second limiting member 922 can freely move laterally along the movable gap in the limiting channel 9121, restricting the relative lateral movement range between adjacent lifting frames 2 within the moving space, thereby not only retaining the slight shaking required between the lifting frames 2 to buffer the inertial force during the translation process but also facilitating the insertion or extraction of the second limiting member 922 into or from the limiting channel 9121.

[0075] As Figure 24 shown, in some specific embodiments, a horizontally arranged constraint mounting plate 221 is provided at the lower end of the guide plate 22 of each lifting frame 2. The top surface of the first connecting plate 911 on the lifting frame 2 abuts against the bottom surface of the constraint mounting plate 221 and is fixedly connected to the constraint mounting plate 221. The setting of the constraint mounting plate 221 increases the contact area between the first limiting structure 91 and the guide plate 22, improving the reliability of the connection. The bottom surfaces of adjacent constraint mounting plates 221 are located on the same horizontal plane, so as to ensure that the adjacent first connecting plates 911 are on the same horizontal plane when the lifting frames 2 are in the retracted state. The constraint mounting plates 221 at the lower ends of the guide plates 22 of the first lifting frame 10 and the second lifting frame 20 located between the supporting bottom plate 1 and the outermost third lifting frame 30 are spaced from the lower end surface of the back plate 21, forming a spaced space for installing the lower rolling member 62. The lower end surface of the constraint mounting plate 221 on the guide plate 22 of the outermost third lifting frame 30 is flush with the lower end surface of the back plate 21, and the inner end surface is flush with the side wall of the connecting groove 217, with good structural stability and good impact resistance against the collision between some connecting structures of the cargo-carrying mechanism 3 in the connecting groove 217 and the side wall of the connecting groove 217.

[0076] As Figure 25 、 26As shown, in some specific embodiments, the constraint assembly 9 further includes a movable structure 93. The movable structure 93 is arranged on the upper side of the rear part of the second connecting plate 912. The second connecting plates 912 of the adjacent front constraint assemblies 9 are arranged in parallel and spaced apart below the first connecting plate 911 of the rear constraint assembly 9 to form a spaced space for installing the movable structure 93. The movable structure 93 includes a mounting assembly 931 connected to the upper side of the rear part of the first connecting plate 912 and a rolling structure 932 installed at the front end of the mounting assembly 931. The front part of the rolling structure 932 has a contact surface that can abut against the rear part of the second limiting member 922 and roll as the second limiting member 922 moves longitudinally, so that the second limiting member 922 and the contact surface have rolling friction, and the friction force is small, which is beneficial to guiding the second limiting member 922 to longitudinally extend into or withdraw from the limiting channel 9121. At the same time, when the adjacent lifting frames 2 shake, collide or move in the direction of separating from each other laterally, a certain buffering force is provided through relative rolling, avoiding rigid pulling, prolonging the service life and reducing noise. The distance between the contact surface and the plane where the front wall of the limiting channel 9121 is located is less than the distance between the front and rear walls of the limiting channel 9121, so as to ensure that only the rear part of the second limiting member 922 can be in tight contact with the contact surface 321, and cannot abut against the rear wall of the limiting channel 9121, avoiding friction between the rear part of the second limiting member 922 and the rear wall of the limiting channel 9121 and affecting the normal lifting movement of each lifting frame 2.

[0077] In some specific embodiments, the mounting assembly 931 includes a rolling seat 9311 for mounting the rolling structure 932, a connecting seat 9312 connected to the upper side of the rear part of the first connecting plate 912, and a buffer member 9313 connected between the rolling seat 9311 and the connecting seat 9312. The rolling seat 9311 is arranged in a U-shaped structure with an open front. The rolling structure 932 is rotatably connected in the rolling seat 9311 through a positioning shaft 9314 arranged parallel to the back plate 21. The buffer member 9313 is arranged as a soft rubber block, and in other embodiments, it can also be arranged as other elastic structures with elastic buffering functions such as a spring or a piston. The buffer member 9313 can provide a buffering force to prevent the second limiting member 922 from moving backward when the rear part of the second limiting member 922 presses against the contact surface of the rolling structure 932 when the second limiting member 922 moves backward, further avoiding rigid pulling between the second limiting structure 92 and the first limiting structure 91, prolonging the service life and reducing noise.

[0078] As Figure 13As shown, in some specific embodiments, the guide plates 22 on the lifting frame 2 are arranged from the upper end to the lower end of the back plate 21 of the lifting frame. The guide plates 22 on the supporting bottom plate 1 are arranged from the upper end of the supporting bottom plate 1 to above the upper part near the lower end of the supporting bottom plate 1, and the lengths of the guide rail structures 81 installed on each guide plate 22 are the same, ensuring that adjacent lifting frames 2 can rise or fall by the same height simultaneously. The moving plates 23 are arranged at the upper ends of the back plates 21 of the lifting frames, enabling adjacent lifting frames 2 and the supporting bottom plates 1 to be fully unfolded relative to each other. The number of moving components 82 installed on each moving plate 23 is the same, with a unified structure, facilitating the unified management of the pre-tightening forces between various parts.

[0079] As Figure 6 shown, in some specific embodiments, each lifting frame 2 is further provided with a reinforcing plate 24. The reinforcing plate 24 is arranged in the horizontal direction. The rear end of the reinforcing plate 24 is fixedly connected to the back plate 21, and both side ends of the reinforcing plate 24 are fixedly connected to the inner sides of the two guide plates 22 respectively, enhancing the stability of the overall structure of the lifting frame 2. The convex part 68 on the upper part of the back plate 21 of the lifting frame 2 is formed by one of the reinforcing plates 24, simplifying the structure.

[0080] As Figure 1 shown, in some specific embodiments, the upper end of the cargo-carrying mechanism 3 is fixedly connected to the front connecting plate 218 and the rear connecting plate 219 through a floating connection structure. The lower part of the cargo-carrying mechanism 3 is set as a box frame structure with an open rear part for accommodating goods.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0082] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A loading device for cargo delivery, characterized in that, include: A supporting base plate connected to the external crossbeam bracket, wherein a driving mechanism and at least one driving belt drivingly connected to the driving mechanism are arranged on the supporting base plate; A plurality of lifting frames are sequentially arranged in front of the supporting bottom plate, and the back plates of adjacent lifting frames are connected by at least one synchronous lifting mechanism, wherein the synchronous lifting mechanism comprises rolling members respectively arranged at the upper and lower ends of the back plates of each lifting frame located between the supporting bottom plate and the outermost lifting frame, and a synchronous belt sleeved on the outside of the back plate along the rolling members, wherein the front portion of the synchronous belt is provided with a front fixing member fixedly connected to the upper portion of the back plate of a lifting frame in front of it, the rear portion of the synchronous belt is provided with a rear fixing member fixedly connected to a lifting frame in the rear or the lower portion of the supporting bottom plate, and the front portion of the driving belt is provided with a front fixing member fixedly connected to the upper portion of the back plate of a lifting frame in front of it, and each lifting frame can be simultaneously raised or lowered under the drive of the driving mechanism; A cargo loading mechanism connected to the lower end of the outermost lifting frame and used for transferring and placing cargo; Guide plates protruding toward the front are respectively arranged along the longitudinal direction on both sides of the supporting bottom plate and the back plates of each lifting frame located between the supporting bottom plate and the outermost lifting frame, and movable plates protruding toward the rear are respectively arranged along the longitudinal direction on both sides of the back plates of each lifting frame, and the two guide plates on the supporting bottom plate are respectively fixedly connected to the two sides of the mounting base plate; a guiding mechanism is arranged between the guide plates and the movable plates of adjacent lifting frames and supporting bottom plates, and the guiding mechanism includes a guide rail structure longitudinally arranged on the outer side of the guide plate and a movable component arranged on the inner side of the movable plate, and each adjacent lifting frame and supporting bottom plate is movably connected to the guide rail structure through the movable component, and can move along the length direction of the guide rail structure; A restraining assembly is provided between the lower ends of the guide plates on the adjacent lifting frames and the supporting bottom plate, and the restraining assembly includes a first limiting structure respectively arranged on the guide plate of a front lifting frame and a second limiting structure arranged on the guide plate of a rear lifting frame or the supporting bottom plate, a limiting channel is longitudinally arranged on the first limiting structure, and the second limiting structure includes a second limiting member arranged longitudinally, the second limiting member can longitudinally extend into the limiting channel and be connected to the first limiting structure as each lifting frame rises, and can be longitudinally withdrawn to the outside of the limiting channel and separated from the first limiting structure as each lifting frame descends, and the second limiting structure arranged on the lifting frame guide plate is connected to the front end of the first limiting structure on the same lifting frame guide plate; The constraint component also includes a movable structure, including an installation component connected to the rear part of the first limiting structure and a rolling member installed at the front end of the installation component, the front part of the rolling member has a contact surface that can abut against the rear part of the second limiting member and roll with the longitudinal movement of the second limiting member, and the distance between the contact surface and the surface where the front wall of the limiting channel is located is less than the distance between the front and rear walls of the limiting channel.

2. The loading device according to claim 1, characterized in that: The front fixing member is configured as a plate structure fixedly connected to the inner side of the front part of the driving belt or the synchronous belt, and is fixedly connected to the upper part of a lifting frame back plate in front of the front fixing member through an adapter, and the adapter includes a vertical adapter plate arranged on the outer side of the front part of the driving belt or the synchronous belt, and the vertical adapter plate is fixedly connected to the front fixing member; The rear fixing member is arranged as a plate structure fixedly connected to the inner side of the rear part of the synchronous belt, and is fixedly connected to the lower part of a lifting frame or a supporting bottom plate behind it through a positioning member. The positioning member includes a vertical positioning plate arranged on the outer side of the rear part of the synchronous belt, and the vertical positioning plate is fixedly connected to the rear fixing member.

3. The loading device according to claim 2, characterized in that: The adapter further includes a horizontal adapter plate connected to the front end of the vertical adapter plate. The upper part of a lifting frame back plate in front of the adapter extends backward to be provided with a horizontal docking plate. The horizontal adapter plate is stacked on the upper side of the horizontal docking plate and fixedly connected to the horizontal docking plate. The bottom surface of the horizontal docking plate near the rolling member at the upper end of the lifting frame behind it is arranged obliquely below the rolling member at the upper end of the rear lifting frame. The positioning member further includes a positioning connection part connected to the vertical positioning plate, and the positioning connection part is fixedly connected to the lower part of a lifting frame or a supporting bottom plate behind it. The top surface of the positioning member near the rolling member at the lower end of the lifting frame in front of it is arranged obliquely above the rolling member at the lower end of the front lifting frame.

4. The loading device according to claim 3, characterized in that: The front part of the supporting bottom plate is provided with a mounting substrate arranged in parallel and at intervals with the supporting bottom plate. The upper and lower ends of the mounting substrate are respectively provided with rolling members with the same number as the driving belts. The driving belts are sleeved outside the mounting substrate along the rolling members. The rear part of the supporting bottom plate is provided with a traction wheel and a transmission wheel with the same number as the driving belts. Each of the transmission wheels is fixedly connected through a wheel shaft. One of the transmission wheels is in transmission connection with a driving mechanism. The transmission wheel and the rolling member at the lower end of the mounting substrate are arranged on the same plane. The traction wheel is arranged above the transmission wheel and its front end protrudes from the front part of the supporting bottom plate through a transmission channel penetrating through the lower part of the supporting bottom plate. The driving belt is sleeved on the outside of the transmission wheel, and the outside of the driving belt abuts against the front wall and the bottom wall of the traction wheel.

5. The loading device according to claim 4, characterized in that: At least one anti-falling component is arranged between the back plates of adjacent lifting frames. The anti-falling component includes a blocking member respectively arranged in the middle or lower part of the back plate of a rear lifting frame, an impact member arranged in the upper part of the back plate of a front lifting frame, and a flexible member arranged above the blocking member. The bottom of the impact member can abut against the top of the flexible member, and the flexible member can provide a buffering force when the blocking member is impacted by the impact member.

6. The loading device according to claim 5, characterized in that: The rolling member is fixed on the lifting frame back plate or the mounting substrate through a rolling base. The rolling base at the upper end of the lifting frame back plate is fixedly connected to the front part of the back plate. The rolling base at the lower end of the lifting frame back plate is fixedly connected to the rear part of the back plate. The rolling bases at the upper and lower ends of the mounting substrate are fixedly connected to the front part of the mounting substrate. The rolling base includes a seat plate longitudinally movably connected to the back plate or the mounting substrate, and a shaft plate and an adjusting plate respectively arranged at the upper and lower ends of the seat plate. The shaft plate is arranged on one side of the seat plate close to the back plate or the mounting substrate. The shaft plate is provided with a shaft hole for installing a rolling shaft of the rolling member. The length direction of the shaft hole is in the same vertical plane as the back plate or the mounting substrate. The adjusting plate is arranged on one side of the seat plate far from the back plate or the mounting substrate and abuts against a convex member on the back plate or the mounting substrate through a vertical adjusting member, and the relative distance between the adjusting plate and the convex member can be changed by adjusting the vertical adjusting member.

7. The loading device according to claim 6, characterized in that: The upper end of the outermost lifting frame back plate is recessed downward to form a first groove. The top surface of the horizontal docking plate on the outermost lifting frame back plate is flush with the bottom wall of the first groove and abuts against the bottom surface of the horizontal transfer plate at the same time. The upper and lower ends of each lifting frame back plate between the supporting bottom plate and the outermost lifting frame are respectively recessed inward to form mounting grooves for accommodating rolling elements. The upper end or the lower end of each lifting frame back plate between the supporting bottom plate and the outermost lifting frame is recessed inward to form a base groove for accommodating a rolling base, and the base groove is located at the outer end of the mounting groove and communicates with the mounting groove. The upper and lower ends of the mounting substrate are respectively recessed inward to form mounting grooves for accommodating rolling elements. The upper end of the mounting substrate is lower than the upper end of the supporting bottom plate, and the lower end of the mounting substrate is higher than the lower end of the supporting bottom plate.

8. The loading device according to claim 7, characterized in that: The lifting frame includes a first lifting frame, a second lifting frame and a third lifting frame arranged in sequence in front of the supporting bottom plate. The lower end of the third lifting frame back plate is recessed upward to form a connection groove for connecting the cargo-carrying mechanism. The third lifting frame back plate is provided with a front connecting plate protruding forward and a rear connecting plate protruding backward. The bottom surfaces of the front connecting plate and the rear connecting plate are flush with the top wall of the connection groove and jointly form a connection platform for connecting with the cargo-carrying mechanism. Two driving belts are arranged on the mounting substrate. Two synchronous belts are arranged on the first lifting frame back plate. One synchronous belt is arranged on the second lifting frame back plate. The front fixing pieces on the two driving belts are fixedly connected to the same transfer piece, and the horizontal transfer plate in the transfer piece is arranged at the middle position of the vertical transfer plate and is located between the two synchronous belts on the first lifting frame. The rear fixing pieces on the two synchronous belts on the first lifting frame are respectively fixedly connected to two positioning pieces, and the positioning connection parts in the two positioning pieces are arranged outside the two driving belts. The front fixing pieces on the two synchronous belts on the first lifting frame are respectively fixedly connected to two transfer pieces, and the two transfer pieces are arranged on both sides of the synchronous belt on the second lifting frame. The positioning piece fixedly connected to the rear fixing piece on the synchronous belt on the second lifting frame is arranged between the two synchronous belts on the first lifting frame.

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