Electric lift

Abstract

This utility model provides an electric lifting device, including a support plate, a load-bearing shaft, a rope pulley, and a load-bearing component. The load-bearing shaft is axially inserted into the support plate and fastened to it. The rope pulley is coaxially sleeved on the load-bearing shaft located on one side of the support plate and rotatably connected to the load-bearing shaft. The load-bearing component includes a rotating seat and two pressure rollers. The two pressure rollers are arranged at a distance from each other on the inner side of the rotating seat and rotatably connected to the rotating seat. The front part of the rotating seat is rotatably connected to the support plate. The front end of the rotating seat forms the load-bearing end, and when the load-bearing end is under load, the two pressure rollers are used to press the rope tightly onto the rope pulley. A drive component is connected to the rotating seat, which is used to drive the two pressure rollers to rotate simultaneously in the forward direction so that the electric lifting device moves upward along the rope. This utility model can improve the structural compactness of the electric lifting device, thereby achieving a lightweight design and improving the convenience of using the electric lifting device.

Description

Technical Field

[0001] This utility model relates to the technical field of high-altitude rescue lifting devices, and more specifically, to an electric lifting device. Background Technology

[0002] In activities such as high-altitude operations, evacuation crossings, escape, rescue, shaft rescue, and cave exploration, lifting devices are often required. Previously, our company applied for a patent application with application number 202511328432X and application title: Electric Lifting Device. In the structure of this electric lifting device, because the gear shaft in the drive component is located on the outside of the rope sheave in the circumferential direction, the electric lifting device has the disadvantage of large size in the radial direction of the rope sheave, which will affect the convenience of using the electric lifting device. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an electric lifting device that can improve the structural compactness of the electric lifting device, that is, reduce the size of the electric lifting device along the radial direction of the rope wheel, so as to achieve a lightweight design of the electric lifting device, thereby improving the convenience of using the electric lifting device.

[0004] This utility model provides an electric lifting device, including a support plate, a load-bearing shaft, a rope pulley, and a load-bearing assembly. The load-bearing shaft is axially inserted into the support plate and fastened to it. The rope pulley is coaxially sleeved on the load-bearing shaft located on one side of the support plate and rotatably connected to the load-bearing shaft. The load-bearing assembly includes a rotating seat and two pressure rollers. The two pressure rollers are arranged at a distance from each other on the inner side of the rotating seat and are rotatably connected to the rotating seat. The front part of the rotating seat is rotatably connected to the support plate. The front end of the rotating seat forms the load-bearing end. When the load-bearing end is under load, the two pressure rollers are used to press the rope tightly onto the rope pulley. A drive assembly is connected to the rotating seat. The drive assembly is used to drive the two pressure rollers to rotate simultaneously in the forward direction so that the electric lifting device moves upward along the rope.

[0005] By integrating the drive component onto the load-bearing component, this invention improves the structural compactness of the electric lift, thereby reducing the size of the electric lift along the radial direction of the rope wheel and achieving a lightweight design, which in turn improves the convenience of using the electric lift.

[0006] In one possible implementation, the drive assembly includes an intermediate gear, a transmission sleeve, a rotating sleeve, and a ratchet structure. The intermediate gear is rotatably connected to the inner side of the rotating seat. Gear portions are provided on the outer walls of one end of each of the two pressure rollers, and both gear portions mesh with the intermediate gear. The transmission sleeve is coaxially fixed to one of the pressure rollers. The rotating sleeve is coaxially disposed inside the transmission sleeve and can rotate relative to the transmission sleeve. The ratchet structure is disposed between the transmission sleeve and the rotating sleeve so that the rotating sleeve can only drive the pressure roller to rotate in the forward direction via the ratchet structure and the transmission sleeve. The outer end of the rotating sleeve is used to engage and rotate with the bit of the electric drill.

[0007] In one possible implementation, the ratchet structure includes a first ratchet block, a first spring, and a first baffle; a first sliding hole is provided on the side wall of the transmission sleeve, and a plurality of first ratchet grooves are evenly spaced on the outer peripheral wall of the rotating sleeve; the first ratchet block is slidably disposed in the first sliding hole; the first baffle is fixed on the transmission sleeve at the outer end of the first sliding hole; the first spring is disposed in the first sliding hole and the two ends of the first spring abut against the outer ends of the first baffle and the first ratchet block, respectively; and the inner end of the first ratchet block abuts against one of the first ratchet grooves.

[0008] In one possible implementation, the electric lifting device further includes a first rope guide assembly, a second rope guide assembly, and a handle assembly; both the first and second rope guide assemblies are rotatably connected to the support plate, and the first rope guide assembly, the load-bearing assembly, and the second rope guide assembly are sequentially spaced around the rope wheel in the circumferential direction, with gaps formed between the first rope guide assembly, the load-bearing assembly, the second rope guide assembly, and the rope wheel for the rope to pass through sequentially; the handle assembly is rotatably connected to one end of the load-bearing shaft and is drively connected to the rotating seat, and when the handle assembly is pressed down, the handle assembly drives the rotating seat to rotate so that the pressure wheel gradually releases the pressure on the rope; an anti-reverse structure is provided between the rope wheel and the support plate.

[0009] In one possible implementation, the anti-reverse structure includes a second ratchet block, a second spring, and a second baffle. A second sliding hole extending along the axial direction of the rope wheel is provided on the support plate. A plurality of second ratchet grooves are uniformly spaced circumferentially at the edge of the rope wheel facing the support plate. The second ratchet block is slidably disposed in the second sliding hole. The second baffle is fixed on the support plate at the outer end of the second sliding hole. The second spring is disposed in the second sliding hole, and the two ends of the second spring abut against the outer ends of the second baffle and the second ratchet block, respectively. The inner end of the second ratchet block abuts against one of the second ratchet grooves.

[0010] In one possible implementation, a dust cover is provided between the pulley and the support plate; the dust cover is fixed to the support plate, and the dust cover abuts against the side of the pulley facing the support plate. The dust cover is used to cover the second ratchet groove, and the second ratchet block is movably inserted in the dust cover.

[0011] In one possible implementation, the front end of the rotating seat is provided with a protrusion, which forms the load-bearing end of the load-bearing component, and the inner side of the protrusion forms a hook hole.

[0012] In one possible implementation, the handle assembly includes a turntable and a handle; the turntable is coaxially sleeved on one end of the load-bearing shaft and can rotate relative to the load-bearing shaft, one end of the handle is coaxially fixed to the turntable, a connecting arm is provided on one side of the rear part of the rotating seat, a cam part is provided on the inner side wall of the turntable, and the end of the connecting arm away from the rotating seat forms a free end and abuts against the outer edge of the cam part.

[0013] In one possible implementation, the first guide rope assembly includes a grooved wheel and a support shaft; the grooved wheel is rotatably connected to a support plate via the support shaft, and a gap is formed between the grooved wheel and the rope wheel for the rope to pass through.

[0014] In one possible implementation, the second rope guide assembly includes a guide seat rotatably connected to a support plate, with a gap formed between the guide seat and the rope wheel for the rope to pass through, and a guide groove provided on the guide seat for the rope to be partially embedded and for guiding the rope. Attached Figure Description

[0015] Figure 1 This is the first three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a second three-dimensional structural schematic diagram of the present invention;

[0017] Figure 3 This is the third three-dimensional structural schematic diagram of the present invention;

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle;

[0020] Figure 6 This is a three-dimensional structural diagram of the present invention after the dust cover has been removed;

[0021] Figure 7 A three-dimensional structural diagram of the assembled drive component and load-bearing component;

[0022] Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure after removing the transmission sleeve. Detailed Implementation

[0023] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] See Figure 1-8 As shown in the figure, this application discloses an electric lifting device, including a support plate 1, a load-bearing shaft 2, a rope pulley 3, and a load-bearing component 4; the load-bearing shaft 2 is axially inserted into the support plate 1 and fastened to the support plate 1, and the rope pulley 3 is coaxially sleeved on the load-bearing shaft 2 located on one side of the support plate 1 and rotatably connected to the load-bearing shaft 2; the load-bearing component 4 includes a rotating seat 41 and two pressure rollers 42; the two pressure rollers 42 are arranged at a front-to-back interval inside the rotating seat 41 and rotatably connected to the rotating seat 41, the front part of the rotating seat 41 is rotatably connected to the support plate 1, the front end of the rotating seat 41 forms a load-bearing end, and when the load-bearing end is under load, the two pressure rollers 42 are used to press the rope tightly onto the rope pulley 3; a drive component 5 is connected to the rotating seat 41, and the drive component 5 is used to drive the two pressure rollers 42 to rotate simultaneously in the forward direction so that the electric lifting device moves upward along the rope.

[0028] See you again Figure 7 and Figure 8As shown, the drive assembly 5 includes an intermediate gear 51, a transmission sleeve 52, a rotating sleeve 53, and a ratchet structure. The intermediate gear 51 is rotatably connected to the inner side of the rotating seat 41. Gear portions 421 are provided on the outer walls of one end of each of the two pressure rollers 42, and both gear portions 421 mesh with the intermediate gear 51. The transmission sleeve 52 is coaxially fixed to one of the pressure rollers 42. The rotating sleeve 53 is coaxially disposed inside the transmission sleeve 52 and can rotate relative to the transmission sleeve 52. The ratchet structure is disposed between the transmission sleeve 52 and the rotating sleeve 53 so that the rotating sleeve 53 can only drive the pressure roller 42 to rotate in the forward direction via the ratchet structure and the transmission sleeve 52. The outer end of the rotating sleeve 53 is used to engage with and rotate with the bit of the electric drill. By adopting this drive assembly, when the outer end of the rotating sleeve engages with the bit of the electric drill, and when the electric drill is operated to drive the rotating sleeve to rotate in the forward direction, the ratchet structure... Under the transmission action of the structure and transmission sleeve, one of the pressure rollers can be driven to rotate forward. With the cooperation of the intermediate gear and gear section, the other pressure roller can also rotate forward synchronously. When both pressure rollers rotate forward, the electric lift can move upward along the rope (the rope pulley and pressure roller rotate in opposite directions) through the cooperation of the pressure roller and rope pulley, thus enabling the personnel suspended on the load-bearing end of the load-bearing component to move upward relative to the rope. Furthermore, it should be noted that if a person accidentally operates a power drill, causing the power drill to drive the rotating sleeve to rotate in the opposite direction, the rotating sleeve and ratchet structure can slip, preventing the rotating sleeve from driving the transmission sleeve and gear shaft to rotate in the opposite direction. This means the drive component cannot drive the pressure roller to rotate in the opposite direction, thus preventing the electric lift from falling downwards along the rope due to accidental operation of the power drill, eliminating the risk of a fall.

[0029] See you again Figure 7 and Figure 8As shown, the ratchet structure includes a first ratchet block 54, a first spring 55, and a first baffle 56. A first sliding hole is provided on the side wall of the transmission sleeve 52, and several first ratchet grooves 531 are evenly spaced on the outer peripheral wall of the rotating sleeve 53. The first ratchet block 54 is slidably disposed in the first sliding hole. The first baffle 56 is fixed to the transmission sleeve 52 at the outer end of the first sliding hole. The first spring 55 is disposed in the first sliding hole, and both ends of the first spring 55 abut against the outer ends of the first baffle 56 and the first ratchet block 54, respectively. The inner end of the first ratchet block 54 abuts against one of the first ratchet grooves 531. By adopting this ratchet structure, when the electric drill drives the rotating sleeve 52... When the rotating sleeve rotates in the forward direction, under the pushing action of the first spring, the first ratchet block is locked with the first ratchet groove, which allows the rotating sleeve to drive the transmission sleeve and pressure wheel to rotate in the forward direction via the ratchet structure. When the electric drill drives the rotating sleeve to rotate in the reverse direction, the first ratchet block will slip with the first ratchet groove. That is, when the rotating sleeve rotates in the reverse direction, the first ratchet block can disengage from the current first ratchet groove and slip into the next first ratchet groove one by one. This prevents the rotating sleeve from driving the transmission sleeve and pressure wheel to rotate in the reverse direction, thereby avoiding the situation where the electric lift falls down the rope due to personnel accidentally operating the electric drill, and eliminating the risk of personnel falling.

[0030] See you again Figures 1-6As shown, the electric lifting device also includes a first rope guide assembly 6, a second rope guide assembly 7, and a handle assembly 8. Both the first rope guide assembly 6 and the second rope guide assembly 7 are rotatably connected to the support plate 1. The first rope guide assembly 6, the load-bearing assembly 4, and the second rope guide assembly 7 are sequentially spaced around the rope wheel 3 in the circumferential direction. Gaps are formed between the first rope guide assembly 6, the load-bearing assembly 4, and the second rope guide assembly 7 and the rope wheel 3 to allow the rope to pass through sequentially. The handle assembly 8 is rotatably connected to one end of the load-bearing shaft 2 and is connected to the rotating seat 41. When the handle assembly 8 is pressed down, it drives the rotating seat 41 to rotate, causing the pressure wheel 42 to gradually release the pressure on the rope. An anti-reverse rotation structure is provided between the rope wheel 3 and the support plate 1. By providing an anti-reverse rotation structure between the rope wheel and the support plate, the reverse rotation of the rope wheel can be prevented under the action of the anti-reverse rotation structure. This design prevents the electric lift from suddenly falling, eliminating potential safety hazards during use. Furthermore, the support plate forms a right-angled triangle structure. The load-bearing shaft is rotatably connected to the middle of the hypotenuse of this right-angled triangle support plate. The first guide rope assembly and the load-bearing assembly are rotatably connected to one of the base corners of the right-angled triangle support plate, and the second guide rope assembly is rotatably connected to the right-angled apex of the right-angled triangle support plate. This support plate structure not only improves the structural stability of the electric lift but also allows for a hollowed-out design, reducing the weight of the electric lift and achieving lightweighting, while enhancing its ease of use.

[0031] The anti-reverse structure includes a second ratchet block 91, a second spring 92, and a second baffle 93. A second sliding hole 11 extending axially along the pulley 3 is provided on the support plate 1. Several second ratchet grooves 31 are evenly spaced circumferentially at the edge of the pulley 3 facing the support plate 1. The second ratchet block 91 is slidably disposed in the second sliding hole 11. The second baffle 93 is fixed to the support plate 1 at the outer end of the second sliding hole 11. The second spring 92 is disposed in the second sliding hole 11, and both ends of the second spring 92 abut against the outer ends of the second baffle 93 and the second ratchet block 91, respectively. The inner end of the second ratchet block 91 abuts against one of the second ratchet grooves 31. With this anti-reverse structure, when the drive assembly drives the pressure wheel to rotate forward so that the electric lift moves upward along the rope, the rope wheel can rotate relative to the support plate. At this time, the inner end of the second ratchet block can continuously disengage from the previous second ratchet groove and be engaged in the next second ratchet groove under the action of the second spring. When the drive assembly stops driving the pressure wheel to rotate forward so that the electric lift is suspended on the rope, if the rope wheel wants to rotate in the opposite direction, the rope wheel can be locked by the second ratchet block and cannot rotate in the opposite direction relative to the support plate. This can prevent the electric lift from falling downward along the rope and eliminate the risk of personnel falling.

[0032] A dust cover 10 is provided between the pulley 3 and the support plate 1. The dust cover 10 is fixed to the support plate 1 and abuts against the side of the pulley 3 facing the support plate 1. The dust cover 10 is used to cover the second ratchet groove 31, and the second ratchet block 91 is movably inserted in the dust cover 10. By setting the dust cover, the dust cover can effectively prevent dust and impurities from getting stuck in the second ratchet groove, thereby maintaining the reliability of the engagement between the second ratchet block and the second ratchet groove.

[0033] The front end of the rotating seat 41 is provided with a protrusion 411, which forms the load-bearing end of the load-bearing component 4. The inner side of the protrusion 411 forms a hook hole 412. When the safety belt worn by the person is attached to the hook hole through the safety buckle, the person can apply downward pressure to the front end of the rotating seat. At this time, the pressure wheel located at the rear of the rotating seat can press the rope tightly onto the rope wheel. Since the rope wheel can only rotate to one side under the action of the anti-reverse structure, the static friction between the rope and the rope wheel and the pressure wheel can prevent the electric lift from sliding down the rope, thus allowing the person to be suspended in the air.

[0034] The handle assembly 8 includes a turntable 81 and a handle 82. The turntable 81 is coaxially sleeved on one end of the load-bearing shaft 2 and can rotate relative to the load-bearing shaft 2. One end of the handle 82 is coaxially fixed to the turntable 81. A connecting arm 413 is provided on one side of the rear of the rotating seat 41. A cam portion 811 is provided on the inner side wall of the turntable 81. The end of the connecting arm 413 away from the rotating seat 41 forms a free end 414 and abuts against the outer edge of the cam portion 811. With this handle assembly, when the safety belt worn by the person is attached by the safety buckle and the hook hole, if the person's hand holds the end of the handle away from the load-bearing shaft and presses down on the handle, When the handle is released, the turntable rotates relative to the load-bearing shaft. At this time, under the cooperation of the cam and the free end of the connecting arm (the cam can push the free end of the connecting arm), the rear of the rotating seat can rotate away from the rope wheel, thereby gradually reducing the pressure of the pressure wheel on the rope. This allows the electric lift to slide down the rope, and the personnel and the electric lift can descend. When the handle is released, under the load of the load-bearing component, the rear of the rotating seat can rotate towards the rope wheel, so that the pressure wheel can press the rope back onto the rope wheel, and the electric lift can stop descending.

[0035] The first rope guide assembly 6 includes a grooved wheel 61 and a support shaft 62; the grooved wheel 61 is rotatably connected to the support plate 1 via the support shaft 62, and a gap is formed between the grooved wheel 61 and the rope wheel 3 for the rope to pass through; by adopting this first rope guide assembly, the grooved wheel can guide the rope so that the rope located between the first rope guide assembly and the load-bearing assembly is tightly pressed against the circumferential direction of the rope wheel.

[0036] The second rope guide assembly 7 includes a guide seat 71, which is rotatably connected to the support plate 1. A gap is formed between the guide seat 71 and the rope wheel 3 for the rope to pass through. The guide seat 71 is provided with a guide groove 711 for the rope to be partially embedded and for guiding the rope. By using this second rope guide assembly, the guide seat can guide the rope so that the rope located between the load-bearing component and the second rope guide assembly is tightly pressed against the circumferential direction of the rope wheel.

[0037] When using this invention, the safety belt worn by the person is engaged with the hook hole via the safety buckle. At this time, the pressure roller in the load-bearing component is pressing the rope tightly against the rope pulley. When the electric drill drives the two pressure rollers to rotate forward via the drive component, the electric lift can move upward along the rope (the rope pulley and pressure roller rotate in opposite directions) under the combined action of the pressure roller and the rope pulley, so as to realize the upward movement of the person suspended on the load-bearing end of the load-bearing component relative to the rope. When the electric drill stops working, the drive component can stop driving the pressure rollers to rotate forward. At this time, the electric lift and the person can stop rising and hover in the air. When the person's hands are gripping the handle... When the handle is pressed down at the end away from the load-bearing shaft, the handle drives the turntable to rotate relative to the load-bearing shaft. At this time, under the cooperation of the cam and the free end of the connecting arm (the cam can push the free end of the connecting arm), the rear part of the rotating seat can rotate away from the rope pulley, thereby gradually reducing the clamping force of the pressure wheel on the rope, which allows the electric lift to slide down along the rope, that is, the personnel and the electric lift can descend. When the handle is released, under the load of the load-bearing end of the load-bearing component, the rear part of the rotating seat can rotate towards the rope pulley, so that the pressure wheel can press the rope back onto the rope pulley, that is, the electric lift can stop descending.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric lifting device, comprising a support plate (1), a load-bearing shaft (2), a rope pulley (3), and a load-bearing assembly (4); the load-bearing shaft (2) is axially inserted into the support plate (1) and fastened to the support plate (1); the rope pulley (3) is coaxially sleeved on the load-bearing shaft (2) located on one side of the support plate (1) and rotatably connected to the load-bearing shaft (2); the load-bearing assembly (4) comprises a rotating seat (41) and two pressure rollers (42); the two pressure rollers (42) are arranged at a front-to-back interval on the inner side of the rotating seat (41) and rotatably connected to the rotating seat (41); the front part of the rotating seat (41) is rotatably connected to the support plate (1); the front end of the rotating seat (41) forms a load-bearing end; and when the load-bearing end is under load, the two pressure rollers (42) are used to press the rope tightly onto the rope pulley (3); characterized in that: A drive assembly (5) is connected to the rotating seat (41). The drive assembly (5) is used to drive the two pressure rollers (42) to rotate in the forward direction at the same time so that the electric lifter moves upward along the rope.

2. The electric lifting device according to claim 1, characterized in that: The drive assembly (5) includes an intermediate gear (51), a transmission sleeve (52), a rotating sleeve (53), and a ratchet structure. The intermediate gear (51) is rotatably connected to the inner side of the rotating seat (41). Gear portions (421) are provided on the outer walls of one end of the two pressure rollers (42), and the two gear portions (421) mesh with the intermediate gear (51). The transmission sleeve (52) is coaxially fixed with one of the pressure rollers (42). The rotating sleeve (53) is coaxially disposed inside the transmission sleeve (52) and can rotate relative to the transmission sleeve (52). The ratchet structure is disposed between the transmission sleeve (52) and the rotating sleeve (53) so that the rotating sleeve (53) can only drive the pressure roller (42) to rotate in the forward direction through the ratchet structure and the transmission sleeve (52). The outer end of the rotating sleeve (53) is used to engage with and rotate with the bit of the electric drill.

3. The electric lifting device according to claim 2, characterized in that: The ratchet structure includes a first ratchet block (54), a first spring (55), and a first baffle (56); a first sliding hole is provided on the side wall of the transmission sleeve (52), and a plurality of first ratchet grooves (531) are evenly spaced on the outer peripheral wall of the rotating sleeve (53). The first ratchet block (54) is slidably disposed in the first sliding hole, and the first baffle (56) is fixed on the transmission sleeve (52) at the outer end of the first sliding hole. The first spring (55) is disposed in the first sliding hole, and the two ends of the first spring (55) abut against the outer ends of the first baffle (56) and the first ratchet block (54) respectively. The inner end of the first ratchet block (54) abuts against one of the first ratchet grooves (531).

4. The electric lifting device according to any one of claims 1-3, characterized in that: The electric lifting device also includes a first rope guide assembly (6), a second rope guide assembly (7), and a handle assembly (8); the first rope guide assembly (6) and the second rope guide assembly (7) are both rotatably connected to the support plate (1), and the first rope guide assembly (6), the load-bearing assembly (4), and the second rope guide assembly (7) are sequentially spaced around the rope wheel (3). The first rope guide assembly (6), the load-bearing assembly (4), and the second rope guide assembly (7) and the rope wheel (3) all form gaps for the rope to pass through in sequence; the handle assembly (8) is rotatably connected to one end of the load-bearing shaft (2) and is connected to the rotating seat (41) in a transmission connection. When the handle assembly (8) is pressed down, the handle assembly (8) is used to drive the rotating seat (41) to rotate so that the pressure wheel (42) gradually releases the pressure on the rope; an anti-reverse structure is provided between the rope wheel (3) and the support plate (1).

5. The electric lifting device according to claim 4, characterized in that: The anti-reverse structure includes a second ratchet block (91), a second spring (92), and a second baffle (93); the support plate (1) is provided with a second sliding hole (11) extending along the axial direction of the rope wheel (3), and the rope wheel (3) is provided with a plurality of second ratchet grooves (31) evenly spaced around its edge facing the support plate (1). The second ratchet block (91) is slidably disposed in the second sliding hole (11), and the second baffle (93) is fixed on the support plate (1) at the outer end of the second sliding hole (11). The second spring (92) is disposed in the second sliding hole (11), and the two ends of the second spring (92) abut against the outer ends of the second baffle (93) and the second ratchet block (91), respectively. The inner end of the second ratchet block (91) abuts against one of the second ratchet grooves (31).

6. The electric lifting device according to claim 5, characterized in that: A dust cover (10) is provided between the rope pulley (3) and the support plate (1); the dust cover (10) is fixed to the support plate (1), and the dust cover (10) abuts against the side of the rope pulley (3) facing the support plate (1). The dust cover (10) is used to cover the second ratchet groove (31), and the second ratchet block (91) is movably inserted into the dust cover (10).

7. The electric lifting device according to claim 4, characterized in that: The front end of the rotating seat (41) is provided with a protrusion (411), which forms the load end of the load-bearing component (4), and a hanging hole (412) is formed on the inner side of the protrusion (411).

8. The electric lifting device according to claim 4, characterized in that: The handle assembly (8) includes a turntable (81) and a handle (82); the turntable (81) is coaxially sleeved on one end of the load-bearing shaft (2) and can rotate relative to the load-bearing shaft (2); one end of the handle (82) is coaxially fixed with the turntable (81); a connecting arm (413) is provided on one side of the rear part of the rotating seat (41); a cam part (811) is provided on the inner side wall of the turntable (81); the end of the connecting arm (413) away from the rotating seat (41) forms a free end (414) and abuts against the outer edge of the cam part (811).

9. The electric lifting device according to claim 4, characterized in that: The first guide rope assembly (6) includes a grooved wheel (61) and a support shaft (62); the grooved wheel (61) is rotatably connected to the support plate (1) through the support shaft (62), and a gap is formed between the grooved wheel (61) and the rope wheel (3) for the rope to pass through.

10. The electric lifting device according to claim 4, characterized in that: The second guide rope assembly (7) includes a guide seat (71), which is rotatably connected to the support plate (1). A gap is formed between the guide seat (71) and the rope wheel (3) for the rope to pass through. The guide seat (71) is provided with a guide groove (711) for the rope to be partially embedded and for guiding the rope.

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