A cross-lift device

Abstract

This invention discloses a cross-type lifting device, including a fixing mechanism, a transmission mechanism, a drive mechanism, and a lifting mechanism. The fixing mechanism includes a base and supports at both ends of the base. The transmission mechanism is connected to the bottom of the base and includes a lead screw, a sliding shaft, and two sliders connected between the two supports. The drive mechanism is located on the base. The lifting mechanism includes two sets of connecting supports and a fixing structure connecting the two sets of connecting supports. The connecting supports include a main lifting rod, a secondary lifting rod, and connecting parts. The fixing structure has sliding grooves. The drive mechanism on the base uses a lead screw and slider transmission to drive the main lifting rod and the secondary lifting rod to perform a scissor-like motion to achieve the lifting of the base. The two connecting parts are slidably installed in the two sliding grooves of the same fixing structure, which not only ensures the stability of the connecting supports but also occupies little space, making it suitable for small equipment. Only one drive mechanism is needed, effectively saving energy.

Description

Technical Field

[0001] This invention relates to the field of lifting device technology, and specifically to a cross-type lifting device. Background Technology

[0002] Currently, there are many types of lifting devices available both domestically and internationally, mainly including scissor lifts, telescopic lifts, hydraulic lifts, and folding lifts, which can be applied to various mechanical equipment lifting applications and scenarios. However, most of these lifting devices are bulky and energy-intensive, making them unsuitable for use with smaller equipment, such as wheelchairs and other similar devices. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing lifting devices, such as large volume, high energy consumption, and unsuitability for small equipment, thereby providing a cross-type lifting device.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] A cross-type lifting device, comprising:

[0006] The fixing mechanism includes a base and supports disposed at both ends of the base;

[0007] A transmission mechanism is connected to the bottom of the base; it includes a lead screw, a sliding shaft, and two sliders that are slidably connected to the sliding shaft and threadedly connected to the lead screw, which are connected between the two brackets and extend in the same direction.

[0008] A drive mechanism, mounted on the base and connected to the lead screw, is used to drive the lead screw to rotate.

[0009] The lifting mechanism includes two sets of connecting brackets respectively connected to the corresponding sliders and a fixing structure connected between the two sets of connecting brackets; the connecting bracket includes a lifting main rod with one end connected to the corresponding slider, a lifting secondary rod with one end hinged to the bracket and the other end hinged to the corresponding lifting main rod, and a connecting member hinged between the other end of the lifting secondary rod and the lifting main rod; the fixing structure is provided with a sliding groove in which the two connecting members can slide.

[0010] Furthermore, there are two lead screws with opposite thread directions. The two lead screws are located on opposite sides of the drive mechanism and are connected to the output end of the drive mechanism via the same connector.

[0011] Furthermore, a reduction gearbox is connected to the output end of the drive mechanism and fixed to the bottom of the base. The reduction gearbox contains a reduction assembly. The reduction assembly includes a drive gear connected to the output end of the drive mechanism and a driven gear meshing with the drive gear. The connector is fixedly connected to the rotating shaft of the driven gear.

[0012] Furthermore, a ball nut threaded onto the lead screw is fixed to the slider.

[0013] Furthermore, the connector includes a connecting shaft passing through the sliding groove between the main lifting rod, the secondary lifting rod, and the fixed structure, and a limiting baffle connected to both ends of the connecting shaft and blocking the outside of the fixed structure and the secondary lifting rod.

[0014] Furthermore, the fixing structure is located between the two lifting main rods.

[0015] Furthermore, one end of the lifting main rod is hinged to the slider via a pin.

[0016] Furthermore, a U-shaped plate is provided at the other end of the lifting main rod, with the opening of the U-shaped plate at the end away from the lifting main rod.

[0017] The technical solution of this invention has the following advantages:

[0018] 1. The cross-type lifting device provided by this invention uses a screw-slider transmission method to drive the lifting main rod and lifting auxiliary rod to perform scissor motion to achieve the lifting of the base. At the same time, two connecting parts passing through the lifting main rod and lifting auxiliary rod on the two connecting brackets are slidably installed in two grooves of the same fixed structure. This not only ensures that the connecting brackets have high stability, but also ensures that the cross angle between the lifting main rod and lifting auxiliary rod can be freely changed within a certain range, making the lifting process of the lifting device smoother, occupying little space, suitable for small equipment, requiring only one driving mechanism, and effectively saving energy.

[0019] 2. The cross-type lifting device provided by the present invention, by setting a connecting member between the lifting main rod, the lifting secondary rod and the sliding groove of the fixed structure, and setting limiting baffles at both ends of the connecting shaft of the connecting member to block the outside of the fixed structure and the lifting secondary rod, can produce a limiting effect, thereby ensuring the fixing effect of the connecting shaft on the lifting main rod, the lifting secondary rod and the sliding groove.

[0020] 3. The cross-type lifting device provided by the present invention has an opening at the other end of the lifting main rod facing a U-shaped plate away from the end of the lifting main rod, which increases the support points of the lifting device and makes the load-bearing capacity of the lifting device stronger. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the fixing mechanism in this invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the transmission mechanism in this invention;

[0024] Figure 3 This is a diagram showing the connection relationship between the fixing mechanism and the transmission mechanism in this invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the deceleration mechanism in this invention;

[0026] Figure 5 This is a diagram showing the connection relationship between the speed reduction mechanism and the transmission mechanism in this invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the lifting mechanism in this invention;

[0028] Figure 7 This is a diagram showing the connection relationship between the lifting mechanism and the fixing mechanism in this invention;

[0029] Figure 8 This is a three-dimensional structural diagram of the cross-type lifting device provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1. Base; 2. Bracket; 3. Bearing; 4. Sliding shaft; 5. Slider; 6. Connector; 7. Lead screw; 8. Ball nut; 9. Driven gear; 10. Screw; 11. Gearbox; 12. Drive gear; 13. Motor; 14. Connecting piece; 15. Lifting auxiliary rod; 16. Lifting main rod; 17. Fixing structure. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1-8 The illustrated cross-type lifting device includes a fixing mechanism, a transmission mechanism, a drive mechanism, and a lifting mechanism. The fixing mechanism includes a base 1 and supports 2 located at both ends of the base 1. The transmission mechanism is connected to the bottom of the base 1 and includes a lead screw 7 extending in the same direction between the two supports 2, a sliding shaft 4, and two sliders 5 slidably connected to the sliding shaft 4 and threadedly connected to the lead screw 7. The drive mechanism is mounted on the base 1 and is connected to the lead screw 7 for driving its rotation. The lifting mechanism includes two sets of connecting supports connected to the corresponding sliders 5 and a fixing structure 17 connecting the two sets of connecting supports. Each connecting support includes a lifting main rod 16 with one end connected to the corresponding slider 5, a lifting secondary rod 15 hinged at one end to the support 2 and the other end to the corresponding lifting main rod 16, and a connecting member 14 hinged between the other end of the lifting secondary rod 15 and the lifting main rod 16. The fixing structure 17 has a sliding groove for the two connecting members 14 to slide within it.

[0036] This type of cross-lifting device uses a screw 7 and slider transmission on the base 1 to drive the lifting main rod 16 and lifting auxiliary rod 15 to perform scissor-like motion to achieve the lifting of the base 1. At the same time, two connecting parts 14 on the two connecting brackets, passing through the lifting main rod 16 and lifting auxiliary rod 15, are slidably installed in two grooves of the same fixed structure. This not only ensures the high stability of the connecting brackets, but also allows the cross angle between the lifting main rod 16 and lifting auxiliary rod 15 to change freely within a certain range, making the lifting process of the device smoother, occupying little space, and suitable for small equipment. Only one drive mechanism is needed, effectively saving energy.

[0037] In this embodiment, the base 1 is square-shaped, and brackets 2 are connected to both ends of the base 1 relative to the two support plates.

[0038] In this embodiment, the sliding shaft 4 is fixedly connected between the two supports 2, and the two sliders 5 are slidably connected to the sliding shaft 4 and threadedly connected to the lead screw 7. Specifically, a ball nut 8 connected to the lead screw 7 is fixedly mounted on the slider 5. When the lead screw 7 rotates, the ball nut 8 drives the slider 5 to move horizontally through the rotational engagement between the lead screw 7 and the ball nut 8. This design allows the sliding shaft 4 to withstand vertical forces.

[0039] In this embodiment, two lead screws 7 are provided at the bottom of the two bases 1. The two lead screws 7 are connected by a connector 6. The ends of the two lead screws 7 away from the connector 6 are rotatably connected between the two brackets 2 through a bearing 3. The threads of the two lead screws 7 are opposite. When the connector 6 and the lead screws 7 are rotated in a certain direction under the force, due to the lateral force and the opposite rotation of the lead screws 7 on both sides, the two sliders 5 will move horizontally towards or in opposite directions.

[0040] In this embodiment, the output end of the drive mechanism is connected to the connector 6 for transmission. A reduction gearbox 11, fixed to the bottom of the base 1 by screws 10, is also connected to the output end of the drive mechanism. A reduction gear assembly is installed inside the reduction gearbox 11. Specifically, the reduction gear assembly includes a drive gear 12 rotatably connected to the output end of the drive mechanism and a driven gear 9 meshing with the drive gear 12. The connector 6 is fixedly connected to the rotating shaft of the driven gear 9. A motor 13, rotatably connected to the rotating shaft of the drive gear 12, is fixedly connected to one side of the reduction gearbox 11. This design allows the motor 13 to drive the drive gear 12 to rotate, which in turn drives the driven gear 9 to rotate, thereby driving the connector 6 and the ball screw 7 to rotate, ultimately causing the two sliders 5 to move horizontally in opposite directions.

[0041] In this embodiment, one end of each of the two lifting main rods 16 is hinged to one of the two sliders 5 via pins. The middle portions of the two lifting main rods 16 are connected by a fixing structure 17, forming a rotary joint. Specifically, the fixing structure 17 has two sliding grooves, and the two lifting main rods 16 are hinged to the two sliding grooves via connectors 14, which are slidable within the grooves. The other end of each of the two lifting main rods 16 is integrally formed with a U-shaped plate, the opening of which is located at the end furthest from the lifting main rod 16. This design increases the support points of the lifting equipment, making its load-bearing capacity stronger.

[0042] In this embodiment, one end of each of the two lifting auxiliary rods 15 is hinged to the two brackets 2 by pins, and the other end of each of the two lifting auxiliary rods 15 is hinged to the middle of the lifting main rod 16 by connectors 14, forming a rotary joint. The lifting auxiliary rods 15 are located outside the lifting main rod 16.

[0043] Specifically, the connector 14 includes a connecting shaft passing through the sliding groove of the lifting main rod 16, the lifting secondary rod 15, and the fixing structure 17, and limiting baffles connected to both ends of the connecting shaft and blocking the outside of the fixing structure 17 and the lifting secondary rod 15. This design can limit the lifting main rod 16 and the lifting secondary rod 15, thereby ensuring the fixing effect of the connecting shaft on the lifting main rod 16, the lifting secondary rod 15, and the sliding groove.

[0044] Working principle: When motor 13 rotates, it drives connector 6 to rotate via gear set. Since the lead screws 7 at both ends of connector 6 rotate in opposite directions, when they rotate in the same direction, the sliders 5 at both ends will inevitably move in opposite directions. The upper end of the lifting main rod 16 connected to the slider 5 will also move in opposite directions to the center or the outside. The lifting principle of the lifting main rod 16 and the lifting auxiliary rod 15 follows the triangle law. When the lengths of the two sides remain unchanged, the change in the length of the bottom will inevitably lead to a change in height. That is, the lengths of the lifting main rod 16 and the lifting auxiliary rod 15 remain unchanged, but the change in the horizontal distance causes a change in the height between the bottom end of the lifting main rod 16 and the base 1, thereby realizing lifting.

[0045] In summary, this type of cross-lifting device uses a lead screw 7 and slider transmission on the base 1 to drive the lifting main rod 16 and lifting auxiliary rod 15 to perform scissor-like motion to achieve the lifting of the base 1. At the same time, the two connecting pieces 14 on the two connecting brackets, which pass through the lifting main rod 16 and lifting auxiliary rod 15, are slidably installed in the two grooves of the same fixed structure. This not only ensures the high stability of the connecting brackets, but also allows the cross angle between the lifting main rod 16 and lifting auxiliary rod 15 to change freely within a certain range, making the lifting process of the device smoother, occupying less space, and suitable for small equipment. Only one drive mechanism is needed, effectively saving energy.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A cross-type lifting device, characterized in that, include: The fixing mechanism includes a base (1) and brackets (2) disposed at both ends of the base (1); A transmission mechanism is connected to the bottom of the base (1); Includes a lead screw (7) connected between the two supports (2) and extending in the same direction, a sliding shaft (4), and two sliders (5) slidably connected to the sliding shaft (4) and threadedly connected to the lead screw (7), the two sliders (5) being adapted to move horizontally toward or in opposite directions; A drive mechanism is mounted on the base (1) and connected to the lead screw (7) for driving the lead screw (7) to rotate; The lifting mechanism includes two sets of connecting brackets respectively connected to the corresponding sliders (5) and a fixing structure (17) connected between the two sets of connecting brackets; the connecting bracket includes a lifting main rod (16) with one end connected to the corresponding slider (5), a lifting auxiliary rod (15) with one end hinged to the bracket (2) and the other end hinged to the corresponding lifting main rod (16), and a connecting piece (14) hinged between the other end of the lifting auxiliary rod (15) and the lifting main rod (16); the fixing structure (17) is provided with a sliding groove in which the two connecting pieces (14) can slide, and the fixing structure (17) is located in the middle of the two lifting main rods (16).

2. The cross-type lifting device according to claim 1, characterized in that, There are two lead screws (7), and the threads of the two lead screws (7) are opposite. The two lead screws (7) are located on opposite sides of the drive mechanism and are connected to the output end of the drive mechanism through the same connector (6).

3. The cross-type lifting device according to claim 2, characterized in that, The output end of the drive mechanism is connected to a reduction gearbox (11) fixed to the bottom of the base (1), and the reduction gearbox (11) is provided with a reduction assembly; the reduction assembly includes a drive gear (12) connected to the output end of the drive mechanism and a driven gear (9) meshing with the drive gear (12); the connector (6) is fixedly connected to the rotating shaft of the driven gear (9).

4. The cross-type lifting device according to claim 1, characterized in that, A ball nut (8) is fixed on the slider (5) and threaded onto the lead screw (7).

5. The cross-type lifting device according to claim 1, characterized in that, The connector (14) includes a connecting shaft passing through the sliding groove of the lifting main rod (16), the lifting auxiliary rod (15) and the fixed structure (17), and a limiting baffle connected to both ends of the connecting shaft and blocking the outside of the fixed structure (17) and the lifting auxiliary rod (15).

6. The cross-type lifting device according to claim 1, characterized in that, One end of the lifting main rod (16) is hinged to the slider (5) by a pin.

7. The cross-type lifting device according to claim 1, characterized in that, A U-shaped plate is provided at the other end of the lifting main rod (16), and the opening of the U-shaped plate is at the end away from the lifting main rod (16).

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