A lateral telescopic spreader lifting device

Abstract

This invention discloses a lateral telescopic lifting device, belonging to the technical field of lifting devices. The main drive shaft is horizontally mounted on a main support frame; a rotary drive assembly is installed on one side of the main support frame; the opening and closing drive mechanism includes a hollow lead screw, which is fitted onto the main drive shaft. Symmetrical forward and reverse external threads are distributed along the axial direction on the outer periphery of the hollow lead screw; a left lead screw nut and a right lead screw nut are threadedly engaged with the hollow lead screw; a hinged fork assembly has a symmetrical left and right support arm assembly. This invention uses a sliding thread transmission method of the hollow lead screw and the left and right lead screw nuts to drive the opening and closing of the left and right support arm assemblies. In limited space, this facilitates the fork's insertion or withdrawal from the lower end of the suspended object, saving space and enhancing the applicability of the support.

Description

Technical Field

[0001] This invention relates to the field of lifting device technology, and in particular to a lateral telescopic lifting device for lifting loads. Background Technology

[0002] When using a lifting method for hoisting in space-constrained conditions, such as hoisting and stacking palletized goods in warehouses or docks, it is often necessary to extend the forks of the spreader into the lower end of the pallet or the lower end of the object being hoisted. However, due to the limited space, conventional spreaders often encounter the problem of not being able to extend or withdraw the forks or actuators. Summary of the Invention

[0003] In response to the technical problems mentioned in the background art, the present invention provides a lateral telescopic lifting device that facilitates the insertion or removal of the fork from the lower end of the pallet or the object being lifted.

[0004] This invention adopts the following technical solution: a lateral telescopic lifting device, comprising a main support frame, a main drive shaft, a rotary drive assembly, an opening and closing drive mechanism, and a hinged fork assembly, wherein the main drive shaft is laterally mounted on the main support frame; the rotary drive assembly is installed on one side of the main support frame and is used to drive the main drive shaft to rotate in a positioning manner; the opening and closing drive mechanism is used to drive the lateral opening and closing of the hinged fork assembly, and it has a hollow lead screw, which is fitted onto the main drive shaft and can rotate with it. Symmetrically arranged on the outer periphery of the hollow lead screw are positive and negative external threads distributed along the axial direction, the positive and negative external threads being located on the axis of the hollow lead screw. To both sides of the center point; the left and right lead screw nuts are respectively threaded into the hollow lead screw. The left and right lead screw nuts are respectively provided with positive internal threads and negative internal threads. The positive and negative internal threads are adapted to the positive and negative external threads, which are used to convert the rotational motion of the hollow lead screw into the opposite translational motion of the left and right lead screw nuts along the axis of the hollow lead screw; the hinge-type support fork assembly has a symmetrical structure of left and right support arm assemblies. The upper ends of the left and right support arm assemblies are fixedly connected to the left and right lead screw nuts respectively, and the bottom ends of the left and right support arm assemblies are movably connected together.

[0005] Furthermore, the rotary drive assembly includes a drive motor and a transmission mechanism, one end of which is rotatably connected to the output shaft of the drive motor, and the other end of which is rotatably connected to the main drive shaft.

[0006] Furthermore, the main drive shaft is a splined shaft, and the inner wall of the hollow lead screw is provided with a matching keyway.

[0007] Furthermore, the left support arm assembly and the right support arm assembly include a left sliding arm and a right sliding arm, with the left lead screw nut and the right lead screw nut symmetrically arranged at the same height on the rear side of the left and right sliding arms; it also includes a left trailing arm and a right trailing arm, each of which is provided with a vertical arm body, and two sets of pins A are symmetrically arranged on the rear side of each set of vertical arm bodies, the two sets of pins A being arranged vertically for insertion into the pin plates on the front side of the left and right sliding arms; each set of vertical arm bodies is provided with a horizontal support fork on the front side, and a pin B is provided at the foremost end of each set of horizontal support forks A, with a hinge plate hinged between the two sets of pins B.

[0008] Furthermore, the top and bottom ends of the left and right sliding arms are provided with sliding grooves, and the upper and lower ends of the main support frame are respectively provided with slide rails that are adapted to the sliding grooves, and the slide rails are arranged parallel to the hollow lead screw.

[0009] Furthermore, at least two sets of the opening and closing drive mechanism and the hinged support fork assembly are provided, and are symmetrically arranged on the left and right sides of the main drive shaft, respectively.

[0010] Compared with existing technologies, the advantages of this invention are as follows: The lateral telescopic lifting device designed in this invention uses a hollow lead screw and a sliding thread transmission method with left and right lead screw nuts to drive the opening and closing of the left and right support arm assemblies. In limited space, this facilitates the insertion or withdrawal of the lifting forks from the lower end of the suspended object, saving space and enhancing the applicability of the support frame. Simultaneously, the lifting forks of this device can be opened to any degree to lift goods without fully extending and closing, improving efficiency. This device is highly practical, widely adaptable, and can be used with various different lifting devices, or used alone or in combination. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the lateral telescopic lifting device of the present invention in use.

[0012] Figure 2 This is a schematic diagram of the overall structure of the lateral telescopic lifting device of the present invention after the fork is retracted.

[0013] Figure 3 This is a schematic diagram showing the connection relationship between the main drive shaft and the hollow lead screw of the present invention;

[0014] Figure 4 This is a schematic diagram of the overall structure of the hinge-type support fork assembly of the present invention;

[0015] Figure 5 This is a schematic diagram showing the connection relationship between the main support frame and the left and right sliding arms of the present invention;

[0016] in:

[0017] 1-Main support frame 2-Drive motor

[0018] 3-Transmission mechanism 4-Main drive shaft

[0019] 5-Hollow lead screw 61-Left lead screw nut

[0020] 62-Right lead screw nut; 71-Left sliding arm.

[0021] 72-Right sliding arm, 8-Hinge-type support fork assembly,

[0022] 81-left trailing arm, 82-right trailing arm,

[0023] 9-Slide rail,

[0024] 8-1-Pin A, 8-2-Horizontal support fork,

[0025] 8-3-Pin B, 8-4-Hinge plate,

[0026] 8-5-Vertical arm body. Detailed Implementation

[0027] The following description, with reference to the accompanying drawings, is provided to facilitate understanding of the technical solutions of the present invention by those skilled in the art. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0028] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a full understanding of embodiments of the invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0029] like Figure 1 and 2 The diagram shows the overall structure of the lateral telescopic lifting device of the present invention in use and after the fork is retracted. The lateral telescopic lifting device includes a main support frame 1, a main drive shaft 4, a rotary drive assembly, an opening and closing drive mechanism, and a hinged fork assembly 8. The main drive shaft 4 is horizontally mounted on the main support frame 1. The rotary drive assembly is installed on one side of the main support frame 1 and is used to drive the positioning rotation of the main drive shaft 4. The hinged fork assembly 8 has a symmetrical left and right support arm assembly. The opening and closing drive mechanism is used to drive the left and right support arm assemblies of the hinged fork assembly 8 to open and close laterally.

[0030] In this embodiment, at least two sets of opening and closing drive mechanisms and hinged support fork assemblies 8 are provided, and they are symmetrically arranged on the left and right sides of the main drive shaft 4. The coordinated use of multiple sets of opening and closing drive mechanisms and hinged support fork assemblies 8 makes the force on the suspended object more balanced.

[0031] The lateral telescopic lifting device designed in this invention drives the main drive shaft 4 to rotate in a position via a rotary drive assembly. The opening and closing drive mechanism follows the rotation of the main drive shaft 4, converting its rotational motion into the lateral opening and closing motion of the left and right support arm assemblies. In a limited space, this facilitates lifting by extending into or withdrawing from the lower end of the object being lifted, saving space and enhancing the applicability of the support.

[0032] In this embodiment, the opening and closing drive mechanism includes a hollow lead screw 5, which is fitted onto the main drive shaft 4 and can rotate with it. The outer periphery of the hollow lead screw 5 is symmetrically provided with positive external threads and negative external threads distributed along the axial direction. The positive external threads and negative external threads are located on both sides of the axial center point of the hollow lead screw 5. The opening and closing drive mechanism also includes a left lead screw nut 61 and a right lead screw nut 62, which are threadedly engaged with the hollow lead screw 5. The left lead screw nut 61 and the right lead screw nut 62 are respectively provided with a positive internal thread and a negative internal thread. The positive internal thread and the negative internal thread are adapted to the positive external thread and the negative external thread, which are used to convert the rotational motion of the hollow lead screw 5 into the opposite translational motion of the left lead screw nut 61 and the right lead screw nut 62 along the axis of the hollow lead screw 5. In actual operation, the rotation of the hollow lead screw 5 can be clockwise or counterclockwise, thereby causing the left lead screw nut 61 and the right lead screw nut 62 to translate along the axis of the hollow lead screw 5 in one direction or another direction.

[0033] In this embodiment, the hinged support fork assembly 8 has a symmetrical left support arm assembly and a right support arm assembly. The upper ends of the left support arm assembly and the right support arm assembly are fixedly connected to the left lead screw nut 61 and the right lead screw nut 62, respectively, and the lower ends of the left support arm assembly and the right support arm assembly are movably connected together.

[0034] In this embodiment, the rotary drive assembly includes a drive motor 2 and a transmission mechanism 3. One end of the transmission mechanism 3 is rotatably connected to the output shaft of the drive motor 2, and the other end is rotatably connected to the main drive shaft 4. In specific implementations, the transmission mechanism 3 can adopt a gear transmission structure or a belt transmission structure; both of these structures are existing technologies and will not be elaborated upon here. Of course, in specific implementations, the drive method can also be manual.

[0035] like Figure 3The diagram shows the connection relationship between the main drive shaft and the hollow lead screw of the present invention. In this embodiment, the main drive shaft 4 is a splined shaft, and the inner wall of the hollow lead screw 5 is provided with a matching keyway. The splined shaft ensures that the hollow lead screw can only be translated axially along the main drive shaft 4 to adjust the spacing of the forks, without slippage or other phenomena, thus improving the overall stability of operation. In addition, in some embodiments, to ensure the stability of the overall structure, the main drive shaft 4 can be two or more, and the corresponding hollow lead screws 5, left lead screw nut 61, and right lead screw nut 62 are also set in two or more sets, which can be designed according to the actual situation. Because the splined shaft 4 and the hollow lead screw 5 are used for connection, the position of the entire hinged fork assembly 8 can be freely adjusted on the main drive shaft 4. This can also indirectly realize the adjustment of the spacing of multiple hinged fork assemblies 8, thereby effectively avoiding obstacles at the bottom of the pallet or the suspended object.

[0036] like Figure 4 The diagram shows the overall structure of the hinged support fork assembly of the present invention. In this embodiment, the left support arm assembly and the right support arm assembly include a left sliding arm 71 and a right sliding arm 72. The left lead screw nut 61 and the right lead screw nut 62 are symmetrically arranged at the same height on the rear side of the left sliding arm 71 and the right sliding arm 72. The left support arm assembly and the right support arm assembly also include a left drag arm 81 and a right drag arm 82. Both the left drag arm 81 and the right drag arm 82 are provided with vertical arm bodies 8-5. Two sets of pins A8-1 are symmetrically arranged on the rear side of each set of vertical arm bodies 8-5. The two sets of pins A8-1 are arranged vertically and are used to connect with the pin plates on the front side of the left sliding arm 71 and the right sliding arm 72. In this embodiment, the drag arm and the sliding arm adopt a through-shaft detachable design. During use, different lengths, widths, and thicknesses of support forks can be replaced at any time according to different working conditions to improve the adaptability of the device. In addition, a horizontal support fork 8-2 is provided on the front side of each set of vertical arm bodies 8-5, and a pin B8-3 is provided at the front end of each set of horizontal support forks 8-2. A hinge plate 8-4 is hinged between the two sets of pins B8-3, thus forming a complete unit. In specific implementation, the horizontal support fork 8-2 can lift the suspended object when it is opened to any degree, without having to fully extend and close.

[0037] like Figure 5 The diagram shows the connection relationship between the main support frame and the left and right sliding arms of the present invention. As an optimized embodiment, sliding grooves are provided at the top and bottom of both the left sliding arm 71 and the right sliding arm 72. Correspondingly, slide rails 9, adapted to the sliding grooves, are provided at the upper and lower ends of the main support frame. The slide rails 9 are arranged parallel to the hollow lead screw 5. The cooperation between the sliding grooves and the slide rails 9 allows the left and right support arm assemblies to maintain a more stable movement trend when opening and closing laterally.

[0038] This device is highly practical and has a wide range of applications. It can be assembled and used with a variety of different lifting devices, or it can be used alone or in combination.

[0039] The operation process of this invention is as follows:

[0040] The rotary drive assembly transmits power to the main drive shaft 4, causing it to rotate and thus rotate the hollow lead screw 5. Since the hollow lead screw 5 has two types of threads—one forward and one reverse—on its left and right sides respectively, the hollow lead screw 5 drives the left lead screw nut 61 and the right lead screw nut 62 to move along the threads, ultimately causing the left sliding arm 71 and the right sliding arm 72 to perform opposite translational movements. Simultaneously, the left sliding arm 71 and the right sliding arm 72 slide on the upper and lower slide rails 9. Specifically, when the left lead screw nut 61 and the right lead screw nut 62 converge towards the center, the two sets of horizontal support forks 8-2 gradually close, extending outwards, thus supporting the bottom of the goods. When the left lead screw nut 61 and the right lead screw nut 62 separate to the sides, the horizontal support forks 8-2 extend laterally to the sides, retracting inwards, allowing the goods to be gradually lowered and detached from the load.

[0041] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A lateral telescoping spreader lifting device characterized by, It includes a main support frame, a main drive shaft, a rotary drive assembly, an opening and closing drive mechanism, and a hinged support fork assembly, among which, The main drive shaft is horizontally mounted on the main support frame; The rotary drive assembly is mounted on one side of the main support frame and is used to drive the main drive shaft to rotate for positioning. The opening and closing drive mechanism is used to drive the lateral opening and closing of the hinge-type support fork assembly. It has a hollow lead screw, which is fitted onto the main drive shaft and can rotate with it. The outer circumference of the hollow lead screw is symmetrically provided with positive external threads and negative external threads distributed along the axial direction. The positive external threads and negative external threads are located on both sides of the axial center point of the hollow lead screw. The left lead screw nut and the right lead screw nut are respectively threaded into the hollow lead screw. The left lead screw nut and the right lead screw nut are respectively provided with positive internal threads and negative internal threads. The positive internal threads and negative internal threads are adapted to the positive external threads and negative external threads, and are used to convert the rotational motion of the hollow lead screw into the opposite translational motion of the left lead screw nut and the right lead screw nut along the axial direction of the hollow lead screw. The hinged support fork assembly has a symmetrical left support arm assembly and a right support arm assembly. The upper ends of the left support arm assembly and the right support arm assembly are fixedly connected to the left lead screw nut and the right lead screw nut, respectively, and the lower ends of the left support arm assembly and the right support arm assembly are movably connected together.

2. The lateral telescopic lifting device according to claim 1, characterized in that, The rotary drive assembly includes a drive motor and a transmission mechanism. One end of the transmission mechanism is rotatably connected to the output shaft of the drive motor, and the other end is rotatably connected to the main drive shaft.

3. The lateral telescoping spreader lifting device of claim 2, wherein, The main drive shaft is a splined shaft, and the inner wall of the hollow lead screw is provided with a matching keyway.

4. The lateral telescoping spreader lifting device of claim 3, wherein, The left and right support arm assemblies include a left sliding arm and a right sliding arm, with the left and right lead screw nuts symmetrically arranged at the same height on the rear side of the left and right sliding arms; they also include a left trailing arm and a right trailing arm, each with a vertical arm body. Two sets of pins A are symmetrically arranged on the rear side of each set of vertical arm bodies, arranged vertically for insertion into the pin plates on the front side of the left and right sliding arms; each set of vertical arm bodies has a horizontal support fork on its front side, with a pin B at the foremost end of each set of horizontal support forks, and a hinge plate hinged between the two sets of pins B.

5. The lateral telescoping spreader lifting device of claim 4, wherein, The top and bottom ends of the left and right sliding arms are provided with sliding grooves, and the upper and lower ends of the main support frame are respectively provided with slide rails that are adapted to the sliding grooves. The slide rails are arranged parallel to the hollow lead screw.

6. The lateral telescoping spreader lifting device of any of claims 1-5, wherein, At least two sets of the opening and closing drive mechanism and the hinged support fork assembly are provided, and are symmetrically arranged on the left and right sides of the main drive shaft, respectively.

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