Synchronous lifting device and handling apparatus having same

Abstract

A synchronous lifting device and a handling apparatus having same. The synchronous lifting device comprises a base, a power source arranged on the base, a plurality of lead screw-nut mechanisms capable of being driven by the power source to act synchronously, and a plurality of lifting frames arranged corresponding to the plurality of lead screw-nut mechanisms, wherein each lead screw-nut mechanism comprises a lead screw and a nut driven by the lead screw to ascend and descend, each nut comprising a body section with an internal thread and a connecting flange formed on the body section; and each lifting frame comprises a body plate and a connecting plate arranged on the body plate. The synchronous lifting device further comprises first elastic pads, each first elastic pad being fixedly connected to a connecting plate and a connecting flange and fastened between the connecting plate and the connecting flange. The present application enables the horizontal height of each lifting frame to be adjusted by means of elastic deformation of the first elastic pad, such that the plurality of lifting frames can be maintained at the same height, thereby reducing the requirements for the machining and assembly precision of related parts in the synchronous lifting device.

Description

Synchronous lifting device and handling equipment having the same

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 1, 2024, with application number 202420254555.8 and invention name “A synchronous lifting device and handling equipment having the same”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of lifting equipment, and in particular to a synchronous lifting device and a handling device having the same. Background Art

[0003] Lifting equipment is commonly used to lift and transport bins in smart warehousing or materials within production lines. A synchronous lifting device is one such type of lifting device. This device uses a single power source to drive two sets of lifting frames to rise and fall synchronously, lifting the object. To prevent the object from tilting or even falling, the top surfaces of the two lifting frames must remain on the same horizontal plane. This necessitates extremely high machining and assembly precision for the components of the synchronous lifting device, resulting in prohibitively high manufacturing costs. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art to a certain extent. To this end, the present application provides a synchronous lifting device and a handling device having the same.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a synchronous lifting device, including a base, a power source arranged on the base, multiple sets of screw-nut mechanisms that can be driven by the power source to move synchronously, and multiple sets of lifting frames arranged corresponding to the multiple sets of the screw-nut mechanisms, the screw-nut mechanism includes a screw and a nut driven to rise and fall by the screw, the nut includes a main body section with an internal thread and a connecting flange formed on the main body section, the lifting frame includes a main body plate and a connecting plate arranged on the main body plate, the synchronous lifting device also includes a first elastic pad, the first elastic pad, the connecting plate and the connecting flange are fixedly connected and the first elastic pad is clamped between the connecting plate and the connecting flange.

[0006] The present invention has the following beneficial effects: by improving the structure of the lifting frame, connecting the connecting plate with the connecting flange on the nut and sandwiching a first elastic pad between the two, the elastic deformation of the first elastic pad can be used to adjust the horizontal height of the lifting frame, thereby achieving the purpose of maintaining the same height for multiple sets of lifting frames. This can also reduce the processing and assembly accuracy requirements of the relevant components of the synchronous lifting device, thereby reducing the manufacturing cost of the synchronous lifting device.

[0007] Optionally, the connecting plate is provided with an avoidance gap for the main body section to pass through.

[0008] Optionally, the cross-sections of the first elastic pad and the connecting plate are both larger than the cross-section of the connecting flange, and a rigid pad is further provided between the connecting flange and the first elastic pad, and the shapes and sizes of the rigid pad, the first elastic pad and the connecting plate are adapted to each other.

[0009] Optionally, the connecting plate, the connecting flange and the first elastic pad are fixed together by bolts.

[0010] Optionally, the lifting frame further includes a supporting plate fixed on the main body plate, and the synchronous lifting device further includes a lifting top plate, and the lifting top plate is respectively fixedly connected to multiple sets of the supporting plates on the lifting frame.

[0011] Optionally, a second elastic pad is interposed between the lifting plate and the support plate. The elastic deformation capability of the second elastic pad can be utilized to adjust the height of the lifting plate, thereby reducing the machining and assembly accuracy requirements for related components of the synchronous lifting device and lowering the manufacturing cost of the synchronous lifting device.

[0012] Optionally, the main plate, the connecting plate and the supporting plate form an integral structure.

[0013] Optionally, a fixing plate is fixedly provided on the base, and the lifting frame can be raised and lowered relative to the fixing plate under the drive of the screw-nut mechanism, and a limiting mechanism is provided between the lifting frame and the fixing plate to limit relative shaking between the two. When the lifting frame is driven by the screw-nut mechanism to perform a lifting movement, the above-mentioned limiting mechanism can improve the stability of the lifting frame and prevent the lifted object from slipping due to shaking of the lifting frame. In addition, after adopting the above-mentioned limiting structure, the screw-nut mechanism only needs to provide vertical power, and the radial force along the screw is borne by the guide rail and the slider, which can protect the screw-nut mechanism to the greatest extent and extend the service life of the screw-nut mechanism.

[0014] Optionally, the limiting mechanism includes a guide rail and a slider compatible with the guide rail, one of the guide rail and the slider is fixedly arranged on the fixing plate, and the other is fixedly arranged on the lifting frame.

[0015] Optionally, the screw-nut mechanism and the lifting frame are each provided with two sets, and the synchronous lifting device further includes:

[0016] A one-input and two-output reducer, the input end of which is connected to the output end of the power source;

[0017] Two sets of couplings, each set of couplings correspondingly connected to one output end of the one-input two-output reducer;

[0018] two sets of commutators, each set of the commutators being connected to the coupling; and

[0019] Two sets of gear transmission assemblies, each set of the gear transmission assemblies includes a driving gear fixedly sleeved outside the commutator and a passive gear meshing with the driving gear for transmission;

[0020] Wherein, the passive gear is fixedly sleeved outside the screw rod.

[0021] In addition, the present application also provides a handling device comprising a frame, the handling device further comprising a synchronous lifting device as described in any of the above technical solutions, the synchronous lifting device being mounted to the frame via a base. The handling device has the same beneficial effects as the aforementioned synchronous lifting device, and will not be further described here.

[0022] These features and advantages of this application will be disclosed in detail in the following detailed description and accompanying drawings. The best embodiments or means of this application will be fully illustrated in conjunction with the accompanying drawings, but this does not limit the technical solutions of this application. Furthermore, although there may be multiple features, elements, and components in each of the following text and accompanying drawings, different symbols or numbers may be used for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0024] FIG1 is a schematic structural diagram of a synchronous lifting device provided in an embodiment of the present application;

[0025] FIG2 is a schematic diagram showing the connection between the screw-nut mechanism, the lifting frame, and the first elastic pad in the synchronous lifting device provided in an embodiment of the present application;

[0026] FIG3 is an enlarged schematic diagram of part A in FIG2 ;

[0027] FIG4 is an exploded view of the lifting frame, the lifting top plate, and the second elastic pad in the synchronous lifting device provided in an embodiment of the present application;

[0028] FIG5 is an exploded view of the fixing plate, lifting frame, and limiting mechanism in the synchronous lifting device provided in an embodiment of the present application;

[0029] FIG6 is a schematic diagram of the power structure of the synchronous lifting device provided in an embodiment of the present application.

[0030] Among them, 1. Base; 10. Fixed plate; 100. Slider; 2. Power source; 20. One-input and two-output reducer; 21. Coupling; 22. Commutator; 23. Driving gear; 24. Passive gear; 3. Screw-nut mechanism; 30. Screw; 31. Nut; 310. Main body section; 311. Connecting flange; 4. Lifting frame; 40. Main body plate; 41. Connecting plate; 42. Support plate; 43. Guide rail; 5. First elastic pad; 6. Rigid pad; 7. Lifting top plate; 8. Second elastic pad. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to be used to explain the present application and are not to be construed as limiting the present application.

[0032] References in this specification to "one embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed herein. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0033] The present invention provides a synchronous lifting device, as shown in Figures 1, 2, and 3. The synchronous lifting device includes a base 1, a power source 2 disposed on the base 1, multiple sets of screw-nut mechanisms 3 capable of synchronous movement driven by the power source 2, and multiple sets of lifting frames 4 corresponding to the multiple sets of screw-nut mechanisms 3. The screw-nut mechanism 3 includes a screw 30 and a nut 31 driven to rise and fall by the screw 30. The lifting frame 4 is fixedly connected to the nut 31. When the power source 2 drives the screw 30 to rotate in both directions, the screw 30 drives the lifting frame 4 to rise and fall through the nut 31. Specifically, the nut 31 includes a main section 310 with an internal thread and a connecting flange 311 formed on the main section 310. The lifting frame 4 includes a main plate 40 and a connecting plate 41 disposed on the main plate 40. The synchronous lifting device also includes a first elastic pad 5. The first elastic pad 5, the connecting plate 41, and the connecting flange 311 are fixedly connected, and the first elastic pad 5 is sandwiched between the connecting plate 41 and the connecting flange 311.

[0034] The synchronous lifting device provided in the embodiment of the present application improves the structure of the lifting frame 4 by connecting the connecting plate 41 to the connecting flange 311 on the nut 31, and sandwiching the first elastic pad 5 therebetween. The elastic deformation of the first elastic pad 5 can be used to adjust the horizontal height of the lifting frame 4, thereby achieving the purpose of maintaining the same height for multiple sets of lifting frames 4. This can reduce the processing and assembly accuracy requirements of the relevant components of the synchronous lifting device, thereby reducing the manufacturing cost of the synchronous lifting device.

[0035] The first elastic pad 5 in the embodiment of the present application is made of polyurethane. In other optional implementations, the first elastic pad 5 may also be made of materials such as silicone or rubber.

[0036] In a possible implementation manner, two sets of the screw-nut mechanism 3 and the lifting frame 4 in this embodiment are provided. In other optional implementation manners, more screw-nut mechanisms and lifting frames can also be provided as needed.

[0037] The connecting plate 41 in the embodiment of the present application is a single piece of plate, and is provided with a clearance notch for the main body section 310 to pass through. With this arrangement, the lower surface of the connecting plate 41 can be fixedly attached to the connecting flange 311 via the first elastic pad 5, while the clearance notch on the connecting plate 41 can be loosely fitted with the main body section 310, limiting the slight movement of the connecting plate 41 in the radial direction of the main body section 310 and ensuring the stability of the lift. Furthermore, the dimensions of the first elastic pad 5 and the connecting plate 41 are designed in the embodiment of the present application, and a rigid pad 6 is added. Specifically, the cross-sections of the first elastic pad 5 and the connecting plate 41 in the embodiment of the present application are both larger than the cross-section of the connecting flange 311. A rigid pad 6 is also provided between the connecting flange 311 and the first elastic pad 5, and the shapes and dimensions of the rigid pad 6, the first elastic pad 5, and the connecting plate 41 are adapted to each other. By setting the cross-sectional dimension of the rigid pad 6 to be larger than the cross-sectional dimension of the connecting flange 311 , the overall dimension of the first elastic pad 5 can be increased, and its function of adapting to the height difference through elastic deformation can be better exerted.

[0038] In the embodiment of the present application, the connecting plate 41, the connecting flange 311 and the first elastic pad 5 are fixed together by bolts. On the one hand, the fixed connection can be achieved by the bolts, and on the other hand, the clamping degree of the first elastic pad 5 can be adjusted by the bolts, thereby facilitating the adjustment of multiple sets of lifting frames 4 to the same height.

[0039] In addition, the synchronous lifting device provided in the embodiment of the present application has another improved design. As shown in Figure 4, the synchronous lifting device also includes a support plate 42 fixed to the main body plate 40. The synchronous lifting device also includes a lifting top plate 7, which is fixedly connected to the support plates 42 of the multiple lifting frames 4. Through this design, the multiple lifting frames 4 are directly connected together through a single lifting top plate 7. On the one hand, the lifting top plate 7 can conveniently determine whether the top surface used to lift the object is horizontal (that is, whether the multiple lifting frames 4 are at the same height). On the other hand, the lifting top plate 7 increases the contact area with the object to be lifted, improving the smoothness of the lifting process. Furthermore, in the embodiment of the present application, a second elastic pad 8 is sandwiched between the lifting top plate 7 and the support plate 42. The second elastic pad 8 performs the same function as the first elastic pad 5. The elastic deformation ability of the second elastic pad 8 is used to adjust the horizontal height of the lifting top plate 7. This can reduce the processing and assembly accuracy requirements of the relevant components of the synchronous lifting device, thereby reducing the manufacturing cost of the synchronous lifting device.

[0040] The main plate 40, the connecting plate 41 and the supporting plate 42 in the embodiment of the present application are formed into an integrated structure. Specifically, they can be directly formed by mold manufacturing or by welding.

[0041] For the purpose of improving the smoothness of the lifting process, as shown in Figure 5, in the embodiment of the present application, a fixed plate 10 is also fixedly provided on the base 1, and the lifting frame 4 can be raised and lowered relative to the fixed plate 10 under the drive of the screw nut mechanism 3, and a limiting mechanism is provided between the lifting frame 4 and the fixed plate 10 for limiting the relative shaking of the two. Specifically, the limiting mechanism in the embodiment of the present application includes a guide rail 43 and a slider 100 adapted to the guide rail 43, wherein the guide rail 43 is provided on the lifting frame 4, and the slider 100 is provided on the fixed plate 10. In the embodiment of the present application, the guide rail 43 and the slider 100 are fixedly installed on the lifting frame 4 and the fixed plate 10 respectively by bolts. In an optional embodiment, the guide rail 43 can also be provided on the fixed plate 10, and the slider 100 can be provided on the lifting frame 4 accordingly. When the lifting frame 4 is driven by the screw-nut mechanism 3 to perform a lifting motion, the aforementioned limiting mechanism enhances the stability of the lifting frame 4, preventing the lifted object from sliding due to shaking of the lifting frame 4. Furthermore, with the aforementioned limiting structure, the screw-nut mechanism 3 only needs to provide vertical power, while the radial force acting on the screw 30 is borne by the guide rail 43 and the slider 100. This maximizes the protection of the screw-nut mechanism 3 and extends its service life.

[0042] In conjunction with Figures 1, 2 and 6, in one embodiment of the present application, two sets of screw-nut mechanisms 3 and lifting frames 4 are provided. In order to ensure that the two sets of screw-nut mechanisms 3 can act synchronously to achieve synchronous driving of the two sets of lifting frames 4, the power structure adopted by the synchronous lifting device provided in the embodiment of the present application is described as follows: the synchronous lifting device also includes a one-input and two-output reducer 20, two sets of couplings 21, two sets of commutators 22 and two sets of gear transmission assemblies. Among them, the input end of the one-input and two-output reducer 20 is connected to the output end of the power source 2, each set of couplings 21 is correspondingly connected to one output end of the one-input and two-output reducer 20, each set of commutators 22 is correspondingly connected to the couplings 21, and each set of gear transmission assemblies includes a driving gear 23 fixedly mounted on the outside of the commutator 22 and a driven gear 24 meshing with the driving gear 23 for transmission, and the driven gear 24 is fixedly mounted on the outside of the screw 30.

[0043] The power source 2 in the embodiment of the present application adopts a drive motor. Specifically, a servo motor can be used as the power source 2. When the synchronous lifting device in the embodiment of the present application is working, the power can be output by the above-mentioned servo motor, and the synchronous transmission of torque and the torque increase can be achieved through the one-input and two-output reducer 20. The two output ends of the one-input and two-output reducer 20 are connected to the coupling 21. The coupling 21 on one side is directly connected to a driving gear 23 through a commutator 22, and the torque is transmitted to the one driving gear 23. The coupling 21 on the other side is connected to the other driving gear 23 through a transmission shaft and a commutator 22, and the torque is transmitted to the other driving gear 23. In addition, the setting of the two couplings 21 can also absorb the errors in the processing and assembly of the structural parts to meet the use requirements of the synchronous lifting of the synchronous lifting device in the embodiment of the present application. In the above process, the torque direction is changed by the commutator 22, and the gear transmission assembly provides the power for the rotational motion of the screw rod 30. The screw-nut mechanism 3 converts the rotational motion of the screw rod 30 into the lifting motion of the nut 31, thereby realizing the synchronous driving of the two sets of lifting frames 4.

[0044] The synchronous lifting device provided in the embodiment of the present application can be applied to handling equipment. Specifically, the handling equipment (not shown in the figure) includes a frame and the synchronous lifting device provided in the embodiment of the present application. The synchronous lifting device can be installed on the frame through the base 1. The embodiment of the present application can adapt to various handling equipment with different needs by adjusting the size of each component in the synchronous lifting device, matching the parameters of different power modules, etc. Preferably, the handling equipment can be designed to be movable, and correspondingly, movable wheels can be provided on the aforementioned frame. Furthermore, the handling equipment can also be designed to be automatically guided. For example, the handling equipment can be an automatically guided transport vehicle commonly used in smart warehousing.

[0045] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Those skilled in the art should understand that the present application includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present application are included within the scope of protection of the present application.

Claims

1. A synchronous lifting device, comprising a base (1), a power source (2) arranged on the base (1), a plurality of sets of screw-nut mechanisms (3) capable of being driven by the power source (2) to move synchronously, and a plurality of lifting frames (4) arranged corresponding to the plurality of sets of the screw-nut mechanisms (3), wherein the screw-nut mechanisms (3) comprise a screw (30) and a nut (31) driven by the screw (30) to be lifted and lowered, the nut (31) comprising a main body section (310) having an internal thread and a connecting flange (311) formed on the main body section (310), the lifting frame (4) comprising a main body plate (40) and a connecting plate (41) arranged on the main body plate (40), and the synchronous lifting device further comprising a first elastic pad (5), wherein the first elastic pad (5), the connecting plate (41) and the connecting flange (311) are fixedly connected, and the first elastic pad (5) is sandwiched between the connecting plate (41) and the connecting flange (311).

2. The synchronous lifting device according to claim 1, wherein the connecting plate (41) is provided with an avoidance gap for the main body section (310) to pass through.

3. The synchronous lifting device according to claim 1, wherein the cross-sections of the first elastic pad (5) and the connecting plate (41) are both larger than the cross-section of the connecting flange (311), and a rigid pad (6) is further provided between the connecting flange (311) and the first elastic pad (5), and the shapes and sizes of the rigid pad (6), the first elastic pad (5) and the connecting plate (41) are adapted to each other.

4. The synchronous lifting device according to any one of claims 1 to 3, wherein the connecting plate (41), the connecting flange (311) and the first elastic pad (5) are fixed together by bolts.

5. The synchronous lifting device according to claim 1, wherein the lifting frame (4) further comprises a support plate (42) fixed on the main plate (40), and the synchronous lifting device further comprises a lifting top plate (7), and the lifting top plate (7) is respectively fixedly connected to the support plates (42) on multiple sets of the lifting frames (4).

6. The synchronous lifting device according to claim 5, wherein a second elastic pad (8) is further provided between the lifting top plate (7) and the supporting plate (42).

7. The synchronous lifting device according to claim 5, wherein the main plate (40), the connecting plate (41) and the supporting plate (42) form an integrated structure.

8. The synchronous lifting device as described in claim 1, wherein a fixed plate (10) is fixedly provided on the base (1), and the lifting frame (4) can be raised and lowered relative to the fixed plate (10) under the drive of the screw nut mechanism (3), and a limiting mechanism is provided between the lifting frame (4) and the fixed plate (10) for limiting relative shaking between the two.

9. The synchronous lifting device according to claim 8, wherein the limiting mechanism includes a guide rail (43) and a slider (100) adapted to the guide rail (43), one of the guide rail (43) and the slider (100) being fixedly arranged on the fixed plate (10), and the other being fixedly arranged on the lifting frame (4).

10. The synchronous lifting device according to claim 1, wherein the screw-nut mechanism (3) and the lifting frame (4) are each provided with two sets, and the synchronous lifting device further comprises: a one-input-two-output speed reducer (20), the input end of which is connected to the output end of the power source (2); Two sets of couplings (21), each set of the couplings (21) correspondingly connected to one output end of the one-input and two-output reducer (20); Two sets of commutators (22), each set of the commutators (22) is connected to the coupling (21); and Two sets of gear transmission assemblies, each set of the gear transmission assemblies includes a driving gear (23) fixedly sleeved outside the commutator (22) and a driven gear (24) meshing with the driving gear (23); The passive gear (24) is fixedly sleeved outside the screw rod (30).

11. A handling device comprising a frame, the handling device further comprising a synchronous lifting device according to any one of claims 1 to 10, the synchronous lifting device being mounted on the frame via the base (1).

Images