A lifting device that can be switched between manual and automatic operation.

Abstract

This utility model relates to a lifting device that can be switched between manual and automatic modes, belonging to the technical field of lifting devices. The lifting device includes: a base plate, a screw jack mounted on the top of the base plate, and a transmission mechanism including a transmission box fixedly connected to the top of the base plate. A driving disc and a driven disc are rotatably connected within the transmission box. A power input shaft is fixedly connected to one end of the driving disc. This lifting device, which allows for both manual and automatic modes, achieves manual and automatic operation through the engagement or disengagement of the driving and driven discs, and the meshing or disengagement of small and large bevel gears. The power source is completely independent when switching between manual and automatic modes: during automatic operation, the manual gear set disengages from the transmission, preventing the motor from rotating the manual components and causing danger; during manual operation, the driving and driven discs disengage, and the motor is completely separated from the transmission mechanism, eliminating the need to overcome motor inertia and significantly reducing manual labor.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, and in particular to a lifting device that can be switched between manual and automatic operation at will. Background Technology

[0002] A lifting device is a piece of equipment that moves objects vertically using mechanical, hydraulic, or electric means. It is widely used in industries such as manufacturing, construction, healthcare, logistics, and home furnishing. Its core function is to safely, stably, and controllably lift or lower loads.

[0003] Some existing lifting devices achieve automated lifting through motor-driven lead screws, hydraulic or chain mechanisms, and have become the mainstream choice for industrial automated production lines and large-scale warehousing equipment. However, in the event of a power outage, motor failure, or line maintenance, the device will completely lose its lifting function; in addition, the devices are mostly rigidly connected, and forced manual operation can easily damage core components such as motors and gears. Utility Model Content

[0004] Therefore, it is necessary to provide a lifting device that can be switched manually or automatically to address the problem that the lifting device cannot be switched manually.

[0005] A lifting device that can be switched between manual and automatic operation includes: a base plate, on the top of which a screw jack is mounted, and a motor is fixedly connected to the top of the base plate; a transmission mechanism disposed between the screw jack and the motor, the transmission mechanism including a transmission box fixedly connected to the top of the base plate, a driving disc and a driven disc rotatably connected within the transmission box, a power input shaft fixedly connected to one end of the driving disc, the power input shaft being connected to the output shaft of the motor via a coupling, a power output shaft provided at one end of the driven disc, the power output shaft being connected to the input shaft of the screw jack, a large bevel gear provided on the surface of the driven disc, a small bevel gear rotatably connected within the transmission box and meshing with the large bevel gear, a connecting rod fixedly connected to the small bevel gear extending through the transmission box to the top of the base plate, and a handwheel fixedly connected to the top of the connecting rod.

[0006] In one embodiment, the active disk is an electromagnet disk, and the active disk is electrically connected to an external power source.

[0007] In one embodiment, the large bevel gear is correspondingly arranged with the driven disk, and the surface of the driven disk is provided with anti-slip protrusions.

[0008] In one embodiment, the transmission box is further provided with a cutting mechanism, which includes a connecting plate fixedly connected to one end of the power output shaft. The connecting plate is rotatably connected inside the transmission box. Multiple telescopic frames are evenly distributed on the connecting plate near the driven plate. A first spring is fixedly connected between the connecting plate and the driven plate.

[0009] In one embodiment, the telescopic frame includes a fixed column fixedly connected to the surface of the connecting plate, and a sliding column fixedly connected to the driven plate is slidably connected inside the fixed column. The first spring is disposed at the center of the surface of the connecting plate.

[0010] In one embodiment, the cutting mechanism further includes a fixed ring fixedly connected to the top of the transmission box, the connecting rod being slidably connected to the fixed ring, a nut being threadedly connected to the upper part of the surface of the connecting rod, and a second spring being provided between the nut and the fixed ring.

[0011] In one embodiment, the first spring is a tension spring, and the elastic force of the first spring is greater than the maximum static friction force between the driving disc and the driven disc.

[0012] In one embodiment, both the large bevel gear and the small bevel gear are configured as high-strength meshing gears, and grease is applied between them.

[0013] Beneficial effects

[0014] 1. The aforementioned lifting device, which allows for easy switching between manual and automatic modes, achieves both manual and automatic modes through the engagement or disengagement of the driving and driven discs, and the meshing or disengagement of the small and large bevel gears. Furthermore, the power source remains completely independent when switching between manual and automatic modes: during automatic operation, the manual gear set disengages from the transmission, preventing the motor from rotating the manual components and causing danger; during manual operation, the driving and driven discs disconnect, completely separating the motor from the transmission mechanism, eliminating the need to overcome motor inertia and significantly reducing manpower consumption.

[0015] 2. Automatic mode can be started simply by powering on to trigger the electromagnetic engagement. Manual mode can be switched by rotating the nut to engage the gears. It is simple to operate and easy to use. The manual mode is set to reduce speed and increase torque, further reducing manual labor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the transmission box of this utility model;

[0019] Figure 3 This is a schematic diagram of the output shaft of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0021] Figure 5 This is an enlarged view of the transmission mechanism of this utility model.

[0022] Figure label:

[0023] 100. Base plate; 200. Screw jack; 300. Motor; 400. Transmission mechanism; 410. Transmission box; 420. Power input shaft; 430. Driving disc; 440. Driven disc; 450. Large bevel gear; 460. Small bevel gear; 470. Connecting rod; 480. Handwheel; 490. Power output shaft; 500. Cutting mechanism; 510. Connecting disc; 520. Telescopic frame; 530. First spring; 540. Fixing ring; 550. Nut; 560. Second spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The following is combined Figure 1 - Figure 5 This invention describes a lifting device that allows for arbitrary switching between manual and automatic operation.

[0026] In one embodiment, a lifting device that can be switched between manual and automatic operation includes: a base plate 100, a screw jack 200 mounted on the top of the base plate 100, and a motor 300 fixedly connected to the top of the base plate 100; a transmission mechanism 400 disposed between the screw jack 200 and the motor 300, the transmission mechanism 400 including a transmission box 410 fixedly connected to the top of the base plate 100, a driving disc 430 and a driven disc 440 rotatably connected within the transmission box 410, one end of the driving disc 430 being fixedly connected to a power input shaft 420, and the driving disc 440 being... The force input shaft 420 is connected to the output shaft of the motor 300 via a coupling. One end of the driven plate 440 is provided with a power output shaft 490, which is connected to the input shaft of the screw jack 200. A large bevel gear 450 is provided on the surface of the driven plate 440. A small bevel gear 460 that meshes with the large bevel gear 450 is rotatably connected inside the transmission box 410. A connecting rod 470 that extends through the transmission box 410 to the top of the base plate 100 is fixedly connected to the small bevel gear 460. A handwheel 480 is fixedly connected to the top of the connecting rod 470.

[0027] like Figure 2 , Figure 3 and Figure 5 As shown, the driving disc 430 is an electromagnet disc, which is electrically connected to an external power source. A large bevel gear 450 is correspondingly positioned to the driven disc 440, and the surface of the driven disc 440 is provided with anti-slip protrusions. Both the large bevel gear 450 and the small bevel gear 460 are high-strength meshing gears, and grease is applied between them.

[0028] In this embodiment, the driving disc 430 is electrically connected to an external power source, and the presence or absence of magnetic force can be controlled by switching the power on and off, thereby controlling the connection with the driven disc 440. An anti-slip protrusion is provided on one side of the driven disc 440 to enhance the friction when the two are engaged, preventing slippage during power transmission. A large bevel gear 450 is fixed to the surface of the driven disc 440 away from the anti-slip protrusion, and a small bevel gear 460 is rotatably connected inside the transmission box 410, achieving speed reduction and torque increase, reducing manual labor. Lubricating grease is applied between the gears to effectively reduce wear during meshing, lower frictional resistance, and improve transmission efficiency and component lifespan in manual mode.

[0029] like Figure 3 , Figure 4 and Figure 5As shown, the transmission box 410 is also equipped with a cutting mechanism 500. The cutting mechanism 500 includes a connecting plate 510 fixedly connected to one end of the power output shaft 490. The connecting plate 510 is rotatably connected inside the transmission box 410. Multiple telescopic frames 520 are evenly distributed on the connecting plate 510 near the driven plate 440. A first spring 530 is fixedly connected between the connecting plate 510 and the driven plate 440. The telescopic frame 520 includes a fixed post fixedly connected to the surface of the connecting plate 510. A sliding post fixedly connected to the driven plate 440 is slidably connected inside the fixed post. The first spring 530 is located at the center of the surface of the connecting plate 510. The cutting mechanism 500 also includes a fixed ring 540 fixedly connected to the top of the transmission box 410. A connecting rod 470 is slidably connected inside the fixed ring 540. A nut 550 is threadedly connected to the upper part of the surface of the connecting rod 470. A second spring 560 is provided between the nut 550 and the fixed ring 540. The first spring 530 is a tension spring, and the elastic force of the first spring 530 is greater than the maximum static friction force between the driving disk 430 and the driven disk 440.

[0030] In this embodiment, the connecting plate 510 cooperates with the telescopic frame 520 and the first spring 530 to guide and reset the axial movement of the driven plate 440. The fixed column and sliding column of the telescopic frame 520 are slidably connected to ensure the stability of the driven plate 440 during axial movement and prevent deviation. The elastic force of the first spring 530 ensures that in manual mode, it can overcome the maximum static friction between the driving plate 430 and the driven plate 440, allowing them to completely separate, preventing the motor 300 from rotating during manual operation, reducing manual operation resistance, and avoiding wear caused by the driving plate 430 and the driven plate 440 not being completely disengaged. The axial movement of the small bevel gear 460 is achieved by the rotation of the nut 550, ensuring precise engagement and disengagement of the gear when switching between manual and automatic modes. This avoids the danger caused by the rotation of the handwheel 480 in automatic mode.

[0031] Working principle: When automatic mode is required, an external power source energizes the drive plate 430, which generates a magnetic force to attract the driven plate 440. At this time, the first spring 530 is stretched. The motor 300 starts, and power is transmitted to the drive plate 430 via the power input shaft 420, and then to the screw jack 200 via the driven plate 440 and the power output shaft 490, driving the screw jack 200 to achieve automatic lifting. In automatic mode, rotating the nut 550 causes it to move downward, compressing the second spring 560. The elastic force of the second spring 560 pushes the connecting rod 470 upward, causing the small bevel gear 460 to disengage from the large bevel gear 450, preventing the manual parts from moving.

[0032] In manual mode, cutting off the power to the drive plate 430 causes the magnetic force to disappear, and the first spring 530 resets, pushing the driven plate 440 to separate from the drive plate 430. The nut 550 moves it upwards, releasing the elastic force of the second spring 560. The connecting rod 470 moves downwards under the influence of gravity and the second spring 560, causing the small bevel gear 460 to mesh with the large bevel gear 450. Turning the handwheel 480 transmits power via the connecting rod 470 to the small bevel gear 460, which, through meshing with the large bevel gear 450, drives the driven plate 440 to rotate. The power is then transmitted via the power output shaft 490 to the screw jack 200, achieving manual lifting. In this mode, there is no need to drive the motor 300, making it more labor-saving.

[0033] It should be noted that the motor 300, screw jack 200, drive disc 430, large bevel gear 450, and small bevel gear 460 mentioned above are all components with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the motor 300 and drive disc 430 can be powered by mains power. The specific power supply method can be selected according to the situation, which will not be elaborated here.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting device that can be switched between manual and automatic operation, characterized in that, include: A base plate (100) is provided, on the top of which a screw jack (200) is installed, and a motor (300) is fixedly connected to the top of which the base plate (100) is also provided. A transmission mechanism (400) is disposed between the screw jack (200) and the motor (300). The transmission mechanism (400) includes a transmission box (410) fixedly connected to the top of the base plate (100). A driving disc (430) and a driven disc (440) are rotatably connected inside the transmission box (410). A power input shaft (420) is fixedly connected to one end of the driving disc (430). The power input shaft (420) is connected to the output shaft of the motor (300) through a coupling. One end of the driven disc (440) is provided with There is a power output shaft (490), which is connected to the input shaft of the screw jack (200). A large bevel gear (450) is provided on the surface of the driven plate (440). A small bevel gear (460) that meshes with the large bevel gear (450) is rotatably connected in the transmission box (410). A connecting rod (470) that extends through the transmission box (410) to the top of the base plate (100) is fixedly connected to the small bevel gear (460). A handwheel (480) is fixedly connected to the top of the connecting rod (470).

2. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 1, characterized in that, The active disk (430) is an electromagnet disk, and the active disk (430) is electrically connected to an external power source.

3. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 2, characterized in that, The large bevel gear (450) is correspondingly arranged with the driven plate (440), and the surface of the driven plate (440) is provided with anti-slip protrusions.

4. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 3, characterized in that, The transmission box (410) is also provided with a cutting mechanism (500). The cutting mechanism (500) includes a connecting plate (510) fixedly connected to one end of the power output shaft (490). The connecting plate (510) is rotatably connected inside the transmission box (410). Multiple telescopic frames (520) are evenly distributed on the connecting plate (510) near the driven plate (440). A first spring (530) is fixedly connected between the connecting plate (510) and the driven plate (440).

5. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 4, characterized in that, The telescopic frame (520) includes a fixed column fixedly connected to the surface of the connecting plate (510), and a sliding column fixedly connected to the driven plate (440) is slidably connected inside the fixed column. The first spring (530) is located at the center of the surface of the connecting plate (510).

6. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 4, characterized in that, The cutting mechanism (500) further includes a fixing ring (540) fixedly connected to the top of the transmission box (410), the connecting rod (470) is slidably connected inside the fixing ring (540), a nut (550) is threadedly connected to the upper part of the surface of the connecting rod (470), and a second spring (560) is provided between the nut (550) and the fixing ring (540).

7. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 4, characterized in that, The first spring (530) is a tension spring, and the elastic force of the first spring (530) is greater than the maximum static friction force between the driving disk (430) and the driven disk (440).

8. The lifting device that allows for arbitrary switching between manual and automatic operation according to claim 1, characterized in that, Both the large bevel gear (450) and the small bevel gear (460) are configured as high-strength meshing gears, and grease is applied between them.

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