An electric lift

Abstract

This utility model provides an electric lifting device, including a support plate, a load-bearing shaft, a rope pulley, and a drive mechanism. The support plate is located on one side of the rope pulley along its axial direction. The load-bearing shaft passes through the support plate axially and is fastened to it. The rope pulley is coaxially sleeved on the load-bearing shaft located on one side of the support plate and is rotatably connected to the load-bearing shaft. The drive mechanism is located on the other side of the rope pulley along its axial direction. The drive mechanism is fixed to the support plate and is connected to the rope pulley for transmission, driving the rope pulley to rotate in the forward direction relative to the load-bearing shaft. By placing the drive mechanism on the other side of the rope pulley along its axial direction, this utility model can reduce the size of the electric lifting device along the radial direction of the rope pulley, thereby 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. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electric lifting device that, by setting the drive mechanism on the other side of the axial direction of the rope wheel, can reduce the size of the electric lifting device in the radial direction of the rope wheel, 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 wheel, and a drive mechanism; the support plate is located on one side of the rope wheel in the axial direction, the load-bearing shaft is axially inserted in the support plate and fastened to the support plate, the rope wheel is coaxially sleeved on the load-bearing shaft located on one side of the support plate and is rotatably connected to the load-bearing shaft; the drive mechanism is located on the other side of the rope wheel in the axial direction, the drive mechanism is fixed to the support plate, the drive mechanism is drivenly connected to the rope wheel and is used to drive the rope wheel to rotate in the forward direction relative to the load-bearing shaft.

[0005] By placing the drive mechanism on the other side of the rope wheel in the axial direction, this invention can reduce the size of the electric lifter in the radial direction of the rope wheel, thereby improving the convenience of using the electric lifter.

[0006] In one possible implementation, the drive mechanism includes a transmission component and a drive component; both the transmission component and the drive component are coaxially arranged with the pulley, the transmission component is fixed to the support plate, the pulley is drivenly connected to the output end of the transmission component, and the drive component is drivenly connected to the input end of the transmission component.

[0007] In one possible implementation, the transmission assembly includes a housing, a gear, a rotating shaft, and a transmission disc. The housing is fixed to a support plate, and a cavity is provided on the side of the housing facing the rope pulley. The inner diameter of the cavity is larger than the outer diameter of the gear. A gear ring portion coaxial with the rope pulley is provided on the inner peripheral wall of the cavity. The gear is disposed in the cavity, and a portion of the outer edge of the gear meshes with a portion of the gear ring portion. The transmission disc is disposed between the rope pulley and the housing. A first groove extending radially from the rope pulley is provided on the side of the rope pulley facing the transmission disc, and a groove extending radially from the transmission disc is provided on the side of the transmission disc facing the rope pulley. A first slider extending radially is slidably fitted in a first groove. A second groove extending radially from the gear is provided on the side of the gear facing the transmission disk. A second slider extending radially from the transmission disk is provided on the side of the transmission disk facing the gear. The second slider is slidably fitted in the second groove. A rotating shaft is inserted into the inner hole of the gear, and the outer peripheral wall of the rotating shaft is in contact with the inner hole wall of the gear. An eccentric shaft is eccentrically provided on the outer end of the rotating shaft. The eccentric shaft moves through the cover and extends out of the cover to form the input end of the transmission assembly.

[0008] In one possible implementation, the drive assembly includes a transmission sleeve, a rotating sleeve, and a ratchet structure. The transmission sleeve is coaxially fixed to the outer end of the eccentric shaft, the rotating sleeve is coaxially disposed inside the transmission sleeve and can rotate relative to the transmission sleeve, and the ratchet structure is disposed between the transmission sleeve and the rotating sleeve so that the rotating sleeve can only drive the rope wheel to rotate in the positive direction relative to the load-bearing shaft via the transmission sleeve and the transmission assembly. The outer end of the rotating sleeve is used to engage with and rotate with the bit of the electric drill. 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.

[0009] In one possible implementation, the electric lifting device further includes a first rope guide assembly, a load-bearing assembly, a second rope guide assembly, and a handle assembly. The first rope guide assembly, the load-bearing assembly, and the second rope guide assembly are all rotatably connected to the support plate and spaced apart around the circumference of the rope pulley. Each of the first rope guide assembly, the load-bearing assembly, and the second rope guide assembly forms a gap with the rope pulley for the rope to pass through sequentially. The front end of the load-bearing assembly forms a load-bearing end, and when the load-bearing end is under load, the load-bearing assembly is used to press the rope tightly against the rope pulley. The handle assembly is rotatably connected to one end of the load-bearing shaft and is drively connected to the load-bearing assembly. When the handle assembly is pressed down, the handle assembly drives the load-bearing assembly to rotate, gradually releasing the load-bearing assembly from the rope's tension. An anti-reverse structure is provided between the rope pulley and the support plate.

[0010] 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.

[0011] 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.

[0012] In one possible implementation, the load-bearing component includes a rotating seat, the front of which is rotatably connected to a support plate, and a plurality of pressure rollers that are spaced apart along the extension direction of the rotating seat are rotatably connected to the rear of the rotating seat and the side facing the rope wheel. The front end of the rotating seat is provided with a protrusion that forms the load-bearing end of the load-bearing component, and a hook hole is formed on the inner side of the protrusion.

[0013] 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.

[0014] In one possible implementation, the first rope guide assembly includes a grooved wheel and a support shaft; the grooved wheel is rotatably connected to the 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; the second rope guide assembly includes a guide seat, which is rotatably connected to the support plate, and a gap is formed between the guide seat and the rope wheel for the rope to pass through; the guide seat is provided with a guide groove 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 three-dimensional structural diagram of the present invention after the transmission sleeve has been removed;

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

[0020] Figure 6 This is an exploded three-dimensional structural diagram of the first part of this utility model;

[0021] Figure 7 This is an exploded perspective view of the second part of this utility model;

[0022] Figure 8 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 9 for Figure 8 A magnified structural diagram of section B. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] See Figure 1-9As shown in the figure, this application discloses an electric lifting device, including a support plate 1, a load-bearing shaft 2, a rope wheel 3, and a drive mechanism; the support plate 1 is located on one side of the rope wheel 3 in the axial direction, the load-bearing shaft 2 is axially inserted in the support plate 1 and fastened to the support plate 1, the rope wheel 3 is coaxially sleeved on the load-bearing shaft 2 located on one side of the support plate 1 and is rotatably connected to the load-bearing shaft 2; the drive mechanism is located on the other side of the rope wheel 3 in the axial direction, the drive mechanism is fixed to the support plate 1, the drive mechanism is drively connected to the rope wheel 3 and is used to drive the rope wheel 3 to rotate in the forward direction relative to the load-bearing shaft 2.

[0029] See you again Figures 4-9 As shown, the drive mechanism includes a transmission assembly 4 and a drive assembly 5. Both the transmission assembly 4 and the drive assembly 5 are coaxially arranged with the rope pulley 3. The transmission assembly 4 is fixed to the support plate 1. The rope pulley 3 is driven by the output end of the transmission assembly 4, and the drive assembly 5 is driven by the input end of the transmission assembly 4. By adopting this drive mechanism, when the drive assembly drives the input end of the transmission assembly to rotate, the output end of the transmission assembly can drive the rope pulley to rotate in the positive direction relative to the load-bearing shaft. This enables the drive assembly to drive the rope pulley to rotate in the positive direction relative to the load-bearing shaft. In addition, under the action of the transmission assembly, the rotational torque is increased, so that the drive assembly can more reliably drive the rope pulley to rotate in the positive direction relative to the load-bearing shaft.

[0030] See you again Figure 6 and Figure 7As shown, the transmission assembly 4 includes a housing 41, a gear 42, a rotating shaft 43, and a transmission disc 44. The housing 41 is fixed on the support plate 1. A cavity is provided on the side of the housing 41 facing the rope wheel 3. The inner diameter of the cavity is larger than the outer diameter of the gear 42. A gear ring portion 411 coaxial with the rope wheel 3 is provided on the inner peripheral wall of the cavity. The gear 42 is disposed in the cavity, and a portion of the outer edge of the gear 42 meshes with a portion of the gear ring portion 411. The transmission disc 44 is disposed between the rope wheel 3 and the housing 41. A first groove 31 extending radially from the rope wheel 3 is provided on the side of the rope wheel 3 facing the transmission disc 44. The transmission disc 44 is provided on the side of the transmission disc 44 facing the rope wheel 3. A first slider 441 extending radially along the transmission disk 44 is provided, and the first slider 441 is slidably engaged in the first slide groove 31. A second slide groove 421 extending radially along the gear 42 is provided on the side of the gear 42 facing the transmission disk 44. A second slider 442 extending radially along the transmission disk 44 is provided on the side of the transmission disk 44 facing the gear 42, and the second slider 442 is slidably engaged in the second slide groove 421. A rotating shaft 43 is inserted into the inner hole of the gear 42, and the outer peripheral wall of the rotating shaft 43 is in contact with the inner hole wall of the gear 42. An eccentric shaft 431 is eccentrically provided on the outer end of the rotating shaft 43. The eccentric shaft 431 extends through the housing 41 and forms the input end of the transmission assembly 4. By employing this transmission assembly, when the drive assembly drives the eccentric shaft to rotate, the gear, through the interaction of the shaft and the gear, can perform an eccentric rotational motion, that is, the gear can perform an eccentric rotational motion along the circumferential direction of the gear ring. Because the second slider on the transmission disc slides against the second groove on the gear, the second slider can reciprocate along the second groove when the gear performs the eccentric rotational motion. Simultaneously, the transmission disc can rotate, and because the first slider on the transmission disc and the second groove on the gear... The first groove on the rope wheel has a sliding fit, which enables the transmission disc and the rope wheel to achieve rotational limit, thereby allowing the transmission disc to drive the rope wheel to rotate in the forward direction relative to the support plate. Under the action of the above-mentioned transmission components, the cooperation between the gear and the gear ring can realize the structure of the harmonic reducer, thereby achieving the purpose of speed reduction and torque increase, so that the drive component can more reliably drive the rope wheel to rotate in the forward direction relative to the load-bearing shaft. In addition, a fixing part is provided on the outer wall of the cover, and an extension part is provided on the support plate. The fixing part on the cover and the extension part on the support plate are fixed together, so that the cover is reliably fastened to the support plate.

[0031] See you again Figures 4-7As shown, the drive assembly 5 includes a transmission sleeve 51, a rotating sleeve 52, and a ratchet structure. The transmission sleeve 51 is coaxially fixed to the outer end of the eccentric shaft 431. The rotating sleeve 52 is coaxially disposed inside the transmission sleeve 51 and can rotate relative to the transmission sleeve 51. The ratchet structure is disposed between the transmission sleeve 51 and the rotating sleeve 52 so that the rotating sleeve 52 can only drive the pulley 3 to rotate in the positive direction relative to the load-bearing shaft 2 via the transmission sleeve 51 and the transmission assembly 4. The outer end of the rotating sleeve 52 is used to engage with and rotate with the bit of the electric drill. The ratchet structure includes a first ratchet block 53, a first spring 54, and a first baffle 55. A first sliding hole is provided on the side wall of the transmission sleeve 51, and a plurality of evenly spaced ratchet holes are provided on the outer peripheral wall of the rotating sleeve 52. A first ratchet groove 521, a first ratchet block 53 slidably disposed in a first sliding hole, a first baffle 55 fixed on a transmission sleeve 51 at the outer end of the first sliding hole, a first spring 54 disposed in the first sliding hole with its two ends abutting against the outer ends of the first baffle 55 and the first ratchet block 53 respectively, and the inner end of the first ratchet block 53 abutting against one of the first ratchet grooves 521; by adopting this drive assembly, when the outer end of the rotating sleeve is engaged 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 eccentric shaft can be driven to rotate in the forward direction under the transmission action of the ratchet structure and the transmission sleeve. At this time, the transmission assembly can drive the rope wheel to rotate in the forward direction. In this configuration, the combined action of the sheave and the rope allows the electric lift to move upwards along the rope, enabling the personnel suspended on the load-bearing end of the load-bearing component to move upwards relative to the rope. Furthermore, it should be noted that if a person accidentally operates the electric drill, causing the rotating sleeve to rotate in the opposite direction, slippage can occur between the rotating sleeve and the ratchet mechanism. This prevents the rotating sleeve from driving the transmission sleeve and eccentric shaft to rotate in the opposite direction, meaning the drive component cannot drive the sheave to rotate in the opposite direction. This prevents the electric lift from falling downwards along the rope due to accidental operation of the electric drill, eliminating the risk of a fall. Additionally, by employing this ratchet mechanism, when the electric drill drives the rotating sleeve... When rotating, 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 eccentric shaft 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 eccentric shaft to rotate in the reverse direction, and the drive component cannot drive the rope wheel to rotate in the reverse direction. This can prevent personnel from accidentally operating the electric drill and causing the electric lift to fall down the rope, thus eliminating the risk of personnel falling.

[0032] See you again Figures 1-9As shown, the electric lifting device also includes a first rope guide assembly 6, a load-bearing assembly 7, a second rope guide assembly 8, and a handle assembly 9. The first rope guide assembly 6, the load-bearing assembly 7, and the second rope guide assembly 8 are all rotatably connected to the support plate 1 and are spaced apart around the circumference of the rope pulley 3. A gap is formed between the first rope guide assembly 6, the load-bearing assembly 7, and the second rope guide assembly 8 and the rope pulley 3 for the rope to pass through sequentially. The front end of the load-bearing assembly 7 forms a load-bearing end, and when the load-bearing end is under load, the load-bearing assembly 7 is used to press the rope tightly against the rope pulley 3. The handle assembly 9 is rotatably connected to one end of the load-bearing shaft 2 and is drively connected to the load-bearing assembly 7. When the handle assembly 9 is pressed down, it drives the load-bearing assembly 7 to rotate, gradually releasing the load-bearing assembly 7 from the pressure on the rope. An anti-reverse structure is provided between the rope pulley 3 and the support plate 1. By providing an anti-reverse structure between the rope pulley and the support plate, the anti-reverse structure... Under this action, the reverse rotation of the rope pulley can be avoided, thus preventing the sudden fall of the electric lift and eliminating potential safety hazards during use. Furthermore, the aforementioned support plate forms a right-angled triangular structure. The load-bearing shaft is rotatably connected to the middle of the hypotenuse of this right-angled triangular 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 triangular support plate, and the second guide rope assembly is rotatably connected to the right-angled apex of the right-angled triangular support plate. By adopting this support plate structure, not only can the structural stability of the electric lift be improved, but also, while ensuring the structural stability of the electric lift, the right-angled triangular support plate can be hollowed out to reduce the weight of the electric lift, achieving lightweighting and improving the convenience of use.

[0033] See you again Figures 8-9As shown, the anti-reverse structure includes a second ratchet block 101, a second spring 102, and a second baffle 103. A second sliding hole 11 extending along the axial direction of the pulley 3 is provided on the support plate 1. A plurality of second ratchet grooves 32 are evenly spaced circumferentially at the edge of the pulley 3 facing the support plate 1. The second ratchet block 101 is slidably disposed in the second sliding hole 11. The second baffle 103 is fixed to the support plate 1 at the outer end of the second sliding hole 11. The second spring 102 is disposed in the second sliding hole 11, and both ends of the second spring 102 are respectively connected to the second baffle 103 and the second... The outer end of the ratchet block 101 abuts against the inner end of the second ratchet block 101, which abuts against one of the second ratchet grooves 32. By adopting this anti-reverse structure, when the rope wheel rotates in the forward direction relative to the support plate, 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. If the rope wheel wants to rotate in the reverse direction, the rope wheel can be locked by the second ratchet block and cannot rotate in the reverse direction relative to the support plate, thereby preventing the electric lift from falling down the rope and eliminating the risk of personnel falling.

[0034] A dust cover 20 is provided between the pulley 3 and the support plate 1. The dust cover 20 is fixed to the support plate 1 and abuts against the side of the pulley 3 facing the support plate 1. The dust cover 20 is used to cover the second ratchet groove 32, and the second ratchet block 101 is movably inserted in the dust cover 20. 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.

[0035] The load-bearing component 7 includes a rotating base 71. The front part of the rotating base 71 is rotatably connected to the support plate 1. The rear part of the rotating base 71, facing the rope wheel 3, is rotatably connected to a plurality of pressure rollers 72 that are spaced apart along the extension direction of the rotating base 71. The front end of the rotating base 71 is provided with a protrusion 711, which forms the load-bearing end of the load-bearing component 7. The inner side of the protrusion 711 forms a hook hole 712. When the safety belt worn by the person is attached to the person through the safety buckle and the hook hole, the person can apply downward pressure to the front end of the rotating base. At this time, the pressure rollers located at the rear of the rotating base can press the rope tightly onto the rope wheel. Since the rope wheel can only rotate in the forward direction relative to the support plate, the static friction between the rope and the rope wheel and the pressure rollers can prevent the electric lift from sliding down the rope, thus allowing the person to be suspended in the air.

[0036] The handle assembly 9 includes a turntable 91 and a handle 92. The turntable 91 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 92 is coaxially fixed to the turntable 91. A connecting arm 713 is provided on one side of the rear of the rotating seat 71. A cam portion 911 is provided on the inner side wall of the turntable 91. The end of the connecting arm 713 away from the rotating seat 71 forms a free end 714 and abuts against the outer edge of the cam portion 911. 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.

[0037] 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. A gap is formed between the grooved wheel 61 and the rope wheel 3 for the rope to pass through. With 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. The second rope guide assembly 8 includes a guide seat 81, which is rotatably connected to the support plate 1. A gap is formed between the guide seat 81 and the rope wheel 3 for the rope to pass through. The guide seat 81 is provided with a guide groove 811 for the rope to be partially embedded and for guiding the rope. With this second rope guide assembly, the guide seat can guide the rope so that the rope located between the load-bearing assembly and the second rope guide assembly is tightly pressed against the circumferential direction of the rope wheel.

[0038] When using this invention, the safety belt worn by the person is in the state of being hooked up with the safety buckle and the hook hole. At this time, the pressure wheel in the load-bearing component is in the state of pressing the rope tightly onto the rope wheel. When the electric drill drives the transmission sleeve in the drive component to rotate forward through the rotating sleeve, the rope wheel can be rotated forward under the action of the transmission component. At this time, under the action of the rope wheel's forward rotation, the electric lift can rise along the rope. When the electric drill stops working, the drive component can stop driving the rope wheel to rotate forward. At this time, the electric lift and the person can stop rising and hover in the air. When the person's hand holds the handle away from the load-bearing shaft... When the handle is pressed down, it 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 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, enabling the personnel and the electric lift to 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, thus stopping the electric lift from descending.

[0039] 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 drive mechanism; wherein the support plate (1) is located on one side of the rope pulley (3) in the axial direction, 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); characterized in that: The driving mechanism is located on the other side of the rope wheel (3) in the axial direction. The driving mechanism is fixed to the support plate (1). The driving mechanism is connected to the rope wheel (3) in a transmission and is used to drive the rope wheel (3) to rotate in the positive direction relative to the load-bearing shaft (2).

2. The electric lifting device according to claim 1, characterized in that: The drive mechanism includes a transmission component (4) and a drive component (5); both the transmission component (4) and the drive component (5) are coaxially arranged with the rope wheel (3), the transmission component (4) is fixed to the support plate (1), the rope wheel (3) is connected to the output end of the transmission component (4), and the drive component (5) is connected to the input end of the transmission component (4).

3. The electric lifting device according to claim 2, characterized in that: The transmission assembly (4) includes a cover (41), a gear (42), a rotating shaft (43), and a transmission disc (44). The cover (41) is fixed on the support plate (1). A cavity is provided on the side of the cover (41) facing the rope wheel (3). The inner diameter of the cavity is larger than the outer diameter of the gear (42). A gear ring portion (411) coaxial with the rope wheel (3) is provided on the inner peripheral wall of the cavity. The gear (42) is located in the cavity, and a part of the outer edge of the gear (42) meshes with a part of the gear ring portion (411). The transmission disc (44) is located between the rope wheel (3) and the cover (41). A first groove (31) extending in the radial direction of the rope wheel (3) is provided on the side of the rope wheel (3) facing the transmission disc (44). A groove extending in the radial direction of the transmission disc (44) is provided on the side of the transmission disc (44) facing the rope wheel (3). The first slider (441) extends and slides in the first groove (31). The gear (42) is provided with a second groove (421) extending in the radial direction of the gear (42) on the side facing the transmission disk (44). The transmission disk (44) is provided with a second slider (442) extending in the radial direction of the transmission disk (44) on the side facing the gear (42). The second slider (442) slides in the second groove (421). The rotating shaft (43) is inserted into the inner hole of the gear (42) and the outer peripheral wall of the rotating shaft (43) is in contact with the hole wall of the inner hole of the gear (42). An eccentric shaft (431) is provided on the outer end of the rotating shaft (43). The eccentric shaft (431) moves through the cover (41) and extends out of the cover (41) to form the input end of the transmission assembly (4).

4. The electric lifting device according to claim 3, characterized in that: The drive assembly (5) includes a transmission sleeve (51), a rotating sleeve (52), and a ratchet structure. The transmission sleeve (51) is coaxially fixed to the outer end of the eccentric shaft (431). The rotating sleeve (52) is coaxially disposed inside the transmission sleeve (51) and can rotate relative to the transmission sleeve (51). The ratchet structure is disposed between the transmission sleeve (51) and the rotating sleeve (52) so that the rotating sleeve (52) can only drive the sheave (3) to rotate in the positive direction relative to the load-bearing shaft (2) via the transmission sleeve (51) and the transmission assembly (4). The outer end of the rotating sleeve (52) is used to engage with and rotate with the bit of the electric drill. The ratchet structure includes a first ratchet block (53). The transmission sleeve (51) has a first sliding hole on its side wall, and a number of first ratchet grooves (521) are evenly spaced on the outer peripheral wall of the rotating sleeve (52). The first ratchet block (53) is slidably disposed in the first sliding hole. The first baffle (55) is fixed on the transmission sleeve (51) at the outer end of the first sliding hole. The first spring (54) is disposed in the first sliding hole and the two ends of the first spring (54) abut against the outer ends of the first baffle (55) and the first ratchet block (53) respectively. The inner end of the first ratchet block (53) abuts against one of the first ratchet grooves (521).

5. The electric lifting device according to any one of claims 1-4, characterized in that: The electric lifting device further includes a first rope guide assembly (6), a load-bearing assembly (7), a second rope guide assembly (8), and a handle assembly (9); the first rope guide assembly (6), the load-bearing assembly (7), and the second rope guide assembly (8) are all rotatably connected to the support plate (1) and are distributed at intervals around the circumferential direction of the rope wheel (3). The first rope guide assembly (6), the load-bearing assembly (7), and the second rope guide assembly (8) are all formed with the rope wheel (3) to allow the rope to pass through in sequence; the front end of the load-bearing assembly (7) forms a load-bearing end, and when the load-bearing end is under load, the load-bearing assembly (7) is used to press the rope tightly onto the rope wheel (3); the handle assembly (9) is rotatably connected to one end of the load-bearing shaft (2) and is connected to the load-bearing assembly (7) in a transmission connection. When the handle assembly (9) is pressed down, the handle assembly (9) is used to drive the load-bearing assembly (7) to rotate so that the load-bearing assembly (7) gradually releases the pressure on the rope; an anti-reverse structure is provided between the rope wheel (3) and the support plate (1).

6. The electric lifting device according to claim 5, characterized in that: The anti-reverse structure includes a second ratchet block (101), a second spring (102), and a second baffle (103); 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 (32) evenly spaced circumferentially at the edge of the side facing the support plate (1). The second ratchet block (101) is slidably disposed in the second sliding hole (11), the second baffle (103) is fixed on the support plate (1) at the outer end of the second sliding hole (11), the second spring (102) is disposed in the second sliding hole (11), and the two ends of the second spring (102) abut against the outer ends of the second baffle (103) and the second ratchet block (101), respectively. The inner end of the second ratchet block (101) abuts against one of the second ratchet grooves (32).

7. The electric lifting device according to claim 6, characterized in that: A dust cover (20) is provided between the rope pulley (3) and the support plate (1); the dust cover (20) is fixed to the support plate (1), and the dust cover (20) abuts against the side of the rope pulley (3) facing the support plate (1). The dust cover (20) is used to cover the second ratchet groove (32), and the second ratchet block (101) is movably inserted into the dust cover (20).

8. The electric lifting device according to claim 5, characterized in that: The load-bearing component (7) includes a rotating seat (71), the front of which is rotatably connected to the support plate (1), and the rear of the rotating seat (71) and the side facing the rope wheel (3) are rotatably connected to a plurality of pressure rollers (72) that are spaced apart along the extension direction of the rotating seat (71). The front end of the rotating seat (71) is provided with a protrusion (711), which forms the load-bearing end of the load-bearing component (7), and the inner side of the protrusion (711) forms a hook hole (712).

9. The electric lifting device according to claim 8, characterized in that: The handle assembly (9) includes a turntable (91) and a handle (92); the turntable (91) 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 (92) is coaxially fixed with the turntable (91); a connecting arm (713) is provided on one side of the rear of the rotating seat (71); a cam part (911) is provided on the inner side wall of the turntable (91); the end of the connecting arm (713) away from the rotating seat (71) forms a free end (714) and abuts against the outer edge of the cam part (911).

10. The electric lifting device according to claim 5, characterized in that: 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) 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; the second rope guide assembly (8) includes a guide seat (81), the guide seat (81) is rotatably connected to the support plate (1), and a gap is formed between the guide seat (81) and the rope wheel (3) for the rope to pass through, and a guide groove (811) is provided on the guide seat (81) for the rope to be partially embedded and for guiding the rope.

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