Lifting device

Abstract

The invention discloses a lifting device which comprises a support, a jacking assembly, a transmission mechanism, a steering mechanism and a handle. The transmission mechanism comprises a main shaft, a first gear, a brake wheel, an elastic brake part and a second gear; the main shaft is rotationally connected to the support, the first gear, the brake wheel and the second gear are sequentially installed on the main shaft, one of the first gear and the second gear is in threaded connection to the main shaft, the brake wheel is installed on the main shaft in a clearance fit mode, and the elastic brake part is arranged on the support. A first containing cavity is formed in the support, the jacking assembly is installed in the first containing cavity, and a rack connected to the first gear is formed at one end of the jacking assembly. A second containing cavity is formed in the handle, the handle is connected to the main shaft, the second gear is located in the second containing cavity, and the steering mechanism is arranged in the second containing cavity. According to the lifting device, the ascending and descending heights of the lifting device can be dynamically adjusted, the labor-saving effect of the lifting device is improved, the use convenience of the lifting device is improved, and the use experience of a user is improved.

Description

Technical Field

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

[0002] During the routine maintenance of two-wheeled vehicles, it is usually necessary to lift the vehicle to facilitate related maintenance work. Currently, this is typically done manually or with the aid of a lifting device. However, existing lifting devices are not very labor-saving and, once the lifting height is determined, cannot be lowered, significantly impacting the ease of use of the lifting device.

[0003] Therefore, it is necessary to provide a lifting device to solve the above-mentioned problems. Summary of the Invention

[0004] This invention provides a lifting device and headphones, which can effectively solve the problems that the lifting device has a relatively poor labor-saving effect and cannot dynamically adjust the lifting height during the lifting of heavy objects.

[0005] To achieve the above objectives, the present invention proposes a lifting device, comprising a support, a lifting assembly, a transmission mechanism, a steering mechanism, and a handle; the transmission mechanism includes a main shaft, a first gear, a brake wheel, an elastic brake element, and a second gear; the main shaft is rotatably connected to the support, the first gear, the brake wheel, and the second gear are sequentially mounted on the main shaft, one of the first gear and the second gear is threadedly connected to the main shaft, the brake wheel is mounted on the main shaft with clearance fit, and the elastic brake element is disposed on the support to control the rotation of the brake wheel; a first receiving cavity is formed inside the support, the lifting assembly is installed in the first receiving cavity, and a rack connected to the first gear is formed at one end of the lifting assembly; a second receiving cavity is formed inside the handle, the handle is connected to the main shaft, and the second gear is located in the second receiving cavity, and the steering mechanism is disposed in the second receiving cavity to control the steering of the second gear.

[0006] In a preferred embodiment, the transmission mechanism further includes a friction element, which is mounted on the main shaft with clearance fit, and the friction element is located between the brake wheel and the first gear and / or between the brake wheel and the second gear.

[0007] In a preferred embodiment, the spindle includes a threaded portion, a transmission portion, and a mounting portion. The mounting portion is connected between the threaded portion and the transmission portion, and a limiting boss is formed on one end of the mounting portion near the transmission portion.

[0008] In a preferred embodiment, the first gear is threadedly connected to the threaded portion, the transmission portion is square shaft shaped, and the second gear has a square hole formed on it that mates with the transmission portion.

[0009] In a preferred embodiment, the second gear is threadedly connected to the threaded portion, and the first gear is integrally formed in the transmission portion.

[0010] In a preferred embodiment, the steering mechanism includes a first steering control member, a first steering block, a first abutment member, a second abutment member, a first elastic member, and a second elastic member; the first abutment member, the second abutment member, and the first steering block are all rotatably connected within a second receiving cavity, and the first steering block is located between the first abutment member and the second abutment member; the first elastic member is connected between the first abutment member and the second receiving cavity, and the second elastic member is connected between the second abutment member and the second receiving cavity; the first steering control member is connected to the first steering block.

[0011] In a preferred embodiment, the steering mechanism includes a second steering control member, a second steering block, and an elastic reset member; the second steering block is rotatably connected to a second receiving cavity; the second steering control member is connected to the second steering block; one end of the second steering block near the second gear has a meshing portion that engages with the second gear, and the other end of the second steering block away from the second gear has a limiting portion; the rotation center distance between the second gear and the second steering block is less than the meshing distance between the second gear and the second steering block; one end of the elastic reset member is located within the limiting portion, and the other end of the elastic reset member is connected to the second receiving cavity.

[0012] In a preferred embodiment, the elastic reset member includes a stop ball and a third elastic member; the stop ball is connected to one end of the third elastic member and is located within the limiting portion; the other end of the third elastic member is connected to the second receiving cavity.

[0013] In a preferred embodiment, the lifting assembly includes a lifting body and a supporting body. The lifting body is installed in a first receiving cavity, and a rack is formed at the end of the lifting body near the first gear. The supporting body is disposed on the end of the lifting body away from the first gear.

[0014] In a preferred embodiment, the lifting device further includes a cover mounted on a bracket to cover the transmission mechanism.

[0015] The beneficial effects of this invention are as follows: by threading one of the first gear and the second gear to the main shaft, and installing the brake wheel on the main shaft with clearance fit, and then controlling the rotation direction of the second gear through the steering mechanism in the handle, the working state of the lifting device is controlled by the generation and disappearance of friction. This allows the lifting assembly to move step by step toward or away from the support, thereby achieving dynamic adjustment of the lifting height and the lowering height. While ensuring the labor-saving effect of the lifting device, it also improves the convenience of using the lifting device and enhances the user experience. Attached Figure Description

[0016] Figure 1This is a first schematic diagram of the overall structure of the lifting device provided by the present invention.

[0017] Figure 2 This is a second schematic diagram of the overall structure of the lifting device provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the transmission mechanism of the lifting device provided by the present invention.

[0019] Figure 4 This is a first schematic diagram of the assembly structure of the transmission mechanism and steering mechanism provided by the present invention.

[0020] Figure 5 This is a second schematic diagram of the assembly structure of the transmission mechanism and steering mechanism provided by the present invention.

[0021] Figure 6 This is a first schematic diagram of the structure of the main shaft of the lifting device provided by the present invention.

[0022] Figure 7 This is a second schematic diagram of the structure of the main shaft of the lifting device provided by the present invention.

[0023] Figure 8 This is a first schematic diagram of the structure of the steering mechanism of the lifting device provided by the present invention.

[0024] Figure 9 This is a second schematic diagram of the structure of the steering mechanism of the lifting device provided by the present invention.

[0025] Figure 10 This is a first schematic diagram of the structure of the second steering top block of the lifting device provided by the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0029] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0030] This invention provides a lifting device, primarily used for lifting heavy objects, including but not limited to two-wheeled vehicles such as motorcycles and bicycles. Please refer to [link / reference]. Figures 1 to 5 In this embodiment, the lifting device includes a bracket 1, a lifting assembly 2, a transmission mechanism 3, a steering mechanism 4, and a handle 5.

[0031] The lifting device is supported by a bracket 1, which houses the main body of the lifting device and other components. The jacking assembly 2 is the output body of the lifting device, used to lift heavy objects. The transmission mechanism 3 is the power transmission part of the lifting device, transmitting the force applied by the user to the jacking assembly 2. The steering mechanism 4 selects the operating mode of the lifting device, including an ascending mode for lifting heavy objects and a descending mode for lowering the height of heavy objects. The handle 5 is the power input part of the lifting device, i.e., the control element for the user to operate the lifting device.

[0032] For details, please refer to Figure 3 The transmission mechanism 3 includes a main shaft 31, a first gear 32, a brake wheel 33, an elastic brake element 34, and a second gear 35. The main shaft 31 is rotatably connected to the bracket 1. The first gear 32, brake wheel 33, and second gear 35 are sequentially mounted on the main shaft 31. One of the first gear 32 and the second gear 35 is threaded to the main shaft 31; either the first gear 32 or the second gear 35 can be threaded to the main shaft 31, depending on the actual design and production requirements. The brake wheel 33 is mounted on the main shaft 31 with a clearance fit, and the elastic brake element 34 is disposed on the bracket 1 to control the rotation of the brake wheel 33.

[0033] The bracket 1 has a first receiving cavity 11 inside, the lifting component 2 is installed in the first receiving cavity 11, and one end of the lifting component 2 has a rack 23 connected to the first gear 32; the handle 5 has a second receiving cavity (not shown in the figure) inside, the handle 5 is connected to the main shaft 31, and the second gear 35 is located in the second receiving cavity. The steering mechanism 4 is set in the second receiving cavity to control the steering of the second gear 35.

[0034] When using the lifting device, the user can determine the required lifting or lowering mode by using the steering mechanism 4 installed on the handle 5, depending on the user's needs to increase or decrease the lifting height of the heavy object. After determining the required working mode, the user can input power to the lifting device by reciprocating the handle 5, and then transmit the power to the lifting assembly 2 through the transmission mechanism 3, so as to realize the function of lifting or lowering the heavy object.

[0035] The following describes the working principle of the lifting device when the first gear 32 is threadedly connected to the main shaft 31:

[0036] Please refer to Figure 2 and Figure 4 When the first gear 32 is threadedly connected to the main shaft 31 and the steering mechanism 4 is in the rising mode, the user swings the handle 5 back and forth. The steering mechanism 4 pushes against and pushes the second gear 35 to rotate in the first direction. The rotation of the second gear 35 drives the main shaft 31 to rotate. Since the first gear 32 and the main shaft 31 are threadedly connected, when the main shaft 31 rotates in the first direction, the first gear 32 and the main shaft 31 tend to tighten. The first gear 32 presses against the brake wheel 33. Under the action of friction, the first gear 32 and the brake wheel 33 rotate with the main shaft 31. The rotation of the first gear 32 drives the rack 23 to move away from the bracket 1, thereby enabling the lifting assembly 2 to achieve the lifting function. When the second gear 35 stops rotating or the user stops swinging the handle 5, under the action of the weight, the rack 23 applies a force to the first gear 32, causing the first gear 32 to rotate in the second direction. The first gear 32 is in the state of pressing the brake wheel 33. Under the pushing action of the elastic brake 34 on the brake wheel 33, the brake wheel 33 cannot rotate. Under the action of the friction between the brake wheel 33 and the first gear 32, the first gear 32 cannot drive the main shaft 31 to rotate in the second direction, thereby realizing the lifting and supporting function of the lifting device.

[0037] When the first gear 32 is threadedly connected to the main shaft 31 and the steering mechanism 4 is in the lowering mode, the user swings the handle 5 back and forth, the steering mechanism 4 pushes against and pushes the second gear 35 to rotate in the second direction, the second gear 35 rotates and drives the main shaft 31 to rotate. Since the first gear 32 is threadedly connected to the main shaft 31, and the brake wheel 33 is clearance-fitted to the main shaft 31, when the main shaft 31 rotates to the second direction, the first gear 32 tends to loosen its connection with the main shaft 31, the clamping state between the first gear 32 and the brake wheel 33 is released, the friction between the first gear 32 and the brake wheel 33 disappears, and the braking effect of the brake wheel 33 fails. Under the weight of the object, the lifting assembly 2 moves towards the support 1, and the rack 23 applies a force to the first gear 32 to rotate to the second direction. The first gear 32 moves towards tightening the main shaft 31, and the first gear 32 and the brake wheel 33 are clamped again. Under the pushing action of the elastic brake 34 on the brake wheel 33, the brake wheel 33 cannot rotate. Under the action of the friction between the brake wheel 33 and the first gear 32, the first gear 32 cannot drive the main shaft 31 to rotate to the second direction, thus realizing the step-by-step lowering function of the lifting device.

[0038] The following describes the working principle of the lifting device when the second gear 35 is threadedly connected to the main shaft 31:

[0039] Please refer to Figure 2 and Figure 5 When the second gear 35 is threadedly connected to the main shaft 31 and the steering mechanism 4 is in the rising mode, the user swings the handle 5 back and forth. The steering mechanism 4 pushes against and pushes the second gear 35 to rotate in the first direction. Since the second gear 35 and the main shaft 31 are threadedly connected, when the second gear 35 rotates in the first direction, there is a tendency for the second gear 35 and the main shaft 31 to tighten. The second gear 35 presses against the brake wheel 33. Under the action of friction, the second gear 35 drives the main shaft 31 and the brake wheel 33 to rotate in the first direction. The main shaft 31 drives the first gear 32 to rotate in the first direction. The first gear 32 rotates and drives the rack 23 to move away from the bracket 1, thereby enabling the lifting assembly 2 to achieve the lifting function. When the second gear 35 stops rotating or the user stops swinging the handle 5, under the action of the weight, the rack 23 applies a force to the first gear 32, causing the first gear 32 to rotate in the second direction. The second gear 35 is in the state of pressing the brake wheel 33. Under the pushing action of the elastic brake 34 on the brake wheel 33, the brake wheel 33 cannot rotate. Under the action of the friction between the brake wheel 33 and the second gear 35, the first gear 32 cannot drive the main shaft 31 to rotate in the second direction, thereby realizing the lifting and supporting function of the lifting device.

[0040] When the second gear 35 is threadedly connected to the main shaft 31 and the steering mechanism 4 is in the lowering mode, the user reciprocates the swing handle 5, causing the steering mechanism 4 to push and drive the second gear 35 to rotate in the second direction. Since the second gear 35 is threadedly connected to the main shaft 31, and the brake wheel 33 is clearance-fitted to the main shaft 31, when the second gear 35 rotates in the second direction, there is a tendency for the second gear 35 and the main shaft 31 to loosen, the clamping state between the second gear 35 and the brake wheel 33 is released, the friction between the second gear 35 and the brake wheel 33 disappears, and thus the braking effect of the brake wheel 33 disappears. Under the weight of the load, the lifting assembly 2 moves towards the support 1, and the rack 23 applies pressure to the first gear 32. The force that causes the first gear 32 to rotate in the second direction causes the first gear 32 to rotate and drive the main shaft 31 to rotate in the second direction. The main shaft 31 and the second gear 35 are gradually tightened together, and the second gear 35 and the brake wheel 33 are pressed together again. Under the pushing action of the elastic brake 34 on the brake wheel 33, the brake wheel 33 cannot rotate. Under the action of the friction between the brake wheel 33 and the second gear 35, the first gear 32 cannot drive the main shaft 31 to rotate in the second direction, thereby realizing the step-by-step lowering function of the lifting device.

[0041] It is understandable that by threading one of the first gear 32 and the second gear 35 to the main shaft 31, and installing the brake wheel 33 on the main shaft 31 with clearance fit, and then controlling the rotation direction of the second gear 35 through the steering mechanism 4 in the handle 5, the working state of the lifting device is controlled by the generation and disappearance of friction. This allows the lifting component 2 to move step by step toward or away from the support 1, thereby achieving dynamic adjustment of the lifting height of the load and the lowering height of the load. While ensuring the labor-saving effect of the lifting device, it also improves the convenience of using the lifting device and enhances the user experience.

[0042] Furthermore, to better ensure the stability of power transmission in transmission mechanism 3, please refer to... Figure 3 In one embodiment, the transmission mechanism 3 further includes a friction element 36, which is mounted on the main shaft 31 with clearance fit. The friction element 36 is located between the brake wheel 33 and the first gear 32 and / or between the brake wheel 33 and the second gear 35.

[0043] Among them, the friction element 36 is used to increase the friction between the first gear 32 and the second gear 35 and the brake element respectively, so as to better ensure the stability of the power transmission of the main shaft 31.

[0044] In the transmission mechanism 3 of the lifting device, the friction element 36 can be installed only between the first gear 32 and the brake wheel 33, or only between the second gear 35 and the brake wheel 33, or both between the first gear 32 and the brake wheel 33 and between the second gear 35 and the brake wheel 33. The choice can be made according to the actual design requirements and the specific conditions of the materials, and no limitation is made here.

[0045] Preferably, friction elements 36 are installed between the first gear 32 and the brake wheel 33, and between the second gear 35 and the brake. It is easy to understand that when friction elements 36 are installed in the gaps between the first gear 32, the brake wheel 33 and the second gear 35, the stability of the power transmission mechanism 3 can be better ensured, slippage of the transmission mechanism 3 is avoided, and the safety of the lifting device after lifting heavy objects is improved.

[0046] Specifically, since the friction element 36 is fitted onto the main shaft 31 with a clearance fit, when the first gear 32 or the second gear 35 presses against the brake wheel 33, the friction element 36 installed between the brake wheel 33 and the first gear 32 and / or between the brake wheel 33 and the second gear 35 is also pressed, and provides a relatively large friction force, thereby better realizing the power transmission function of the transmission mechanism 3 and the reverse braking function of the brake wheel 33.

[0047] Understandably, by setting the friction element 36, the freedom of material selection for the transmission mechanism 3 is increased, while the stability of power transmission by the transmission mechanism 3 is better ensured, the reverse braking performance of the brake wheel 33 is enhanced, and the safety of the lifting device is improved.

[0048] For further details, please refer to... Figure 6 In one embodiment, the spindle 31 includes a threaded portion 311, a transmission portion 313 and a mounting portion 312. The mounting portion 312 is connected between the threaded portion 311 and the transmission portion 313, and a limiting boss 314 is formed on one end of the mounting portion 312 near the transmission portion 313.

[0049] The threaded portion 311 and the transmission portion 313 are located at both ends of the main shaft 31, respectively, for mounting the first gear 32 and the second gear 35. The mounting portion 312 is located in the middle of the main shaft 31 for mounting the brake wheel 33 with clearance fit. The limiting boss 314 is used to limit the brake wheel 33.

[0050] For further details, please refer to... Figure 6 When the first gear 32 is threaded to the threaded part 311 and the second gear 35 is installed on the transmission part 313, the installation method between the second gear 35 and the transmission part 313 includes, but is not limited to, key connection, square shaft sleeve connection, etc., which can be selected according to the actual design requirements.

[0051] Preferably, when the first gear 32 is threaded onto the threaded portion 311, the transmission portion 313 is square-shaft shaped, and the second gear 35 has a square hole that mates with the transmission portion 313. It is understood that by setting the transmission portion 313 to a square-shaft shape, opening a square hole in the second gear 35, and using a sleeve connection between the second gear 35 and the transmission portion 313, the stability of the transmission between the second gear 35 and the main shaft 31 can be ensured, while also improving the ease of installation of the second gear 35.

[0052] For further details, please refer to... Figure 7 When the second gear 35 is threaded to the threaded part 311 and the first gear 32 is installed on the transmission part 313, the installation method between the first gear 32 and the transmission part 313 includes, but is not limited to, a split method such as key connection and an integral molding method, which can be selected according to the actual design requirements.

[0053] Preferably, when the second gear 35 is threaded into the threaded portion 311, the first gear 32 is integrally formed into the transmission portion 313. It is understood that by integrally forming the first gear 32 into the transmission portion 313, the stability of the transmission between the first gear 32 and the main shaft 31 can be improved relatively better, and the convenience and efficiency of the installation of the transmission mechanism 3 can be effectively improved.

[0054] For further details, please refer to... Figure 5 and Figure 9 In one embodiment, the steering mechanism 4 includes a first steering control member 41, a first steering block 42, a first abutment member 43, a second abutment member 44, a first elastic member 45, and a second elastic member 46; the first abutment member 43, the second abutment member 44, and the first steering block 42 are all rotatably connected to the second receiving cavity, and the first steering block 42 is located between the first abutment member 43 and the second abutment member 44; the first elastic member 45 is connected between the first abutment member 43 and the second receiving cavity, and the second elastic member 46 is connected between the second abutment member 44 and the second receiving cavity; the first steering control member 41 is connected to the first steering block 42.

[0055] The first steering control component 41 is an operating component for the user to select the operating mode of the lifting device. The first steering top block 42 is used to control the corresponding abutment component according to the corresponding operating mode. The first abutment component 43 is a structural component that abuts and pushes the second gear 35 to rotate in the first direction when the lifting device is in the rising mode, and the second abutment component 44 is a structural component that abuts and pushes the second gear 35 to rotate in the second direction when the lifting device is in the lowering mode. The first elastic component 45 and the second elastic component 46 are the reset components for the first abutment component 43 and the second abutment component 44, respectively.

[0056] Specifically, when the user rotates the first steering control 41 to the lifting mode, the first steering control 41 rotates and drives the first steering top block 42 to rotate. The first steering top block 42 presses against the second abutment 44, and the second abutment 44 presses against the second elastic member 46. Under the elastic force of the first elastic member 45, the first abutment 43 moves towards the first steering top block 42 and abuts against the first steering top block 42 and the second gear 35 respectively. After the lifting mode is determined, the user can push the handle 5 to swing back and forth between the first steering and the second steering to realize the lifting function of the lifting device. When the handle 5 is within the swing stroke of the first steering, under the action of the second elastic member 46, the second abutment 44 abuts against and supports the first steering top block 42, and the first abutment 43 abuts against the first steering block and the second gear 35 respectively, thereby pushing the second gear 35 to rotate in the first steering direction. When the handle 5 is within the swing stroke of the second steering, the teeth of the second gear 35 push the first abutment 43, the first abutment 43 is pressed and presses against the first elastic member 45, the first abutment 43 separates from the first steering block 42, when the first abutment 43 passes through the tooth groove of the second gear 35, the first elastic member 45 applies elastic force to the first abutment 43, the first abutment 43 abuts against the first steering block 42 again, that is, the second gear 35 does not rotate during the swing stroke of the second steering.

[0057] When the user rotates the first steering control 41 to the lowering mode, the first steering control 41 rotates and drives the first steering top block 42 to rotate. The first steering top block 42 presses against the first abutting member 43, and the first abutting member 43 presses against the first elastic member 45. Under the elastic force of the second elastic member 46, the second abutting member 44 moves towards the first steering top block 42 and abuts against the first steering top block 42 and the second gear 35 respectively. After the lowering mode is determined, the user can push the handle 5 to swing back and forth between the first steering and the second steering to realize the lowering function of the lifting device. When the handle 5 is within the swing stroke of the second steering direction, under the action of the first elastic member 45, the first abutting member 43 abuts against and supports the first steering block 42, and the second abutting member 44 abuts against the first steering block 42 and the second gear 35 respectively, thereby pushing the second gear 35 to rotate in the second steering direction; when the handle 5 is within the swing stroke of the first steering direction, the teeth of the second gear 35 push the second abutting member 44, the second abutting member 44 is pressed and presses against the second elastic member 46, the second abutting member 44 separates from the first steering block 42, when the second abutting member 44 passes through the tooth groove of the second gear 35, the second elastic member 46 applies elastic force to the second abutting member 44, the second abutting member 44 abuts against the first steering block 42 again, that is, in the swing stroke of the first steering direction, the second gear 35 does not rotate.

[0058] For further details, please refer to... Figure 4 , Figure 8 and Figure 10 In one embodiment, the steering mechanism 4 includes a second steering control member 47, a second steering top block 48, and an elastic reset member 49; the second steering top block 48 is rotatably connected to the second receiving cavity; the second steering control member 47 is connected to the second steering top block 48; the end of the second steering top block 48 near the second gear 35 has a meshing portion that engages with the second gear 35, and the end of the second steering top block 48 away from the second gear 35 has a limiting portion; the rotation center distance between the second gear 35 and the second steering top block 48 is less than the meshing distance between the second gear 35 and the second steering top block 48; one end of the elastic reset member 49 is located in the limiting portion, and the other end of the elastic reset member 49 is connected to the second receiving cavity.

[0059] The second steering control component 47 is an operating component for the user to select the operating mode of the lifting device. The second steering top block 48 is used to control the rotation of the second gear 35 according to the corresponding operating mode. The elastic reset component 49 is a device for resetting the second steering top block 48. The meshing part is a transmission structure that engages the second steering top block 48 with the second gear 35, and the limiting part is a structure on the second steering top block 48 that engages with the elastic reset component 49. Specifically, the meshing part includes a first meshing part 481 and a second meshing part 482 spaced apart, and the limiting part includes a first limiting part 483 and a second limiting part 484 adjacent to each other. The elastic reset component 49 includes a stop ball 491 and a third elastic component 492; the stop ball 491 is connected to one end of the third elastic component 492 and is located within the limiting part; the other end of the third elastic component 492 is connected to the second receiving cavity.

[0060] When the user rotates the second steering control 47 to the lifting mode, the second steering control 47 rotates and drives the second steering top block 48 to rotate, causing the abutment ball 491 to extend into the first limiting part 483, and the first meshing part 481 engages with the second gear 35. After the lifting mode is determined, the user can reciprocate by pushing the handle 5 back and forth between the first steering and the second steering to achieve the lifting function of the lifting device. When the handle 5 is within the swing stroke of the first steering, the first meshing part 481 of the second steering top block 48 engages with the second gear 35. Under the reaction force of the second gear 35, the second steering top block 48 has a tendency to rotate in the first steering direction. However, since the rotation center distance between the second gear 35 and the second steering top block 48 is less than the meshing distance between the second gear 35 and the second steering top block 48, the second steering top block 48 cannot rotate in the direction of the first steering. This further causes the first meshing part 481 to abut against the second gear 35 in the first steering direction, thereby pushing the second gear 35 to rotate in the first steering direction. When the handle 5 is within the swing stroke of the second steering direction, the teeth of the second gear 35 push the first meshing part 481 to rotate in the second steering direction, thereby causing the second steering top block 48 to rotate in the second steering direction. The first limiting part 483 pushes the abutting ball 491 and presses the third elastic member 492. When the second steering top block 48 rotates to the point where the first meshing part 481 disengages from the tooth groove of the second gear 35, under the elastic force of the third elastic member 492, the abutting ball 491 will push the second steering top block 48 to reset, and the first meshing part 481 will engage with the second gear 35 again. That is, during the swing stroke of the second steering direction, the second gear 35 does not rotate.

[0061] When the user rotates the second steering control 47 to the lowering mode, the second steering control 47 rotates and drives the second steering top block 48 to rotate. The abutment ball 491 extends into the second limiting part 484, and the second meshing part 482 engages with the second gear 35. After the lowering mode is determined, the user can reciprocate by pushing the handle 5 back and forth between the first steering and the second steering to realize the lowering function of the lifting device. When the handle 5 is within the swing stroke of the second steering, the second meshing part 482 of the second steering top block 48 engages with the second gear 35. Under the reaction force of the second gear 35, the second steering top block 48 has a tendency to rotate in the second steering direction. However, since the rotation center distance between the second gear 35 and the second steering top block 48 is less than the meshing distance between the second gear 35 and the second steering top block 48, the second steering top block 48 cannot rotate in the second steering direction. This further causes the second meshing part 482 to abut against the second gear 35 in the second steering direction, thereby pushing the second gear 35 to rotate in the second steering direction. When the handle 5 is within the swing stroke of the first steering direction, the teeth of the second gear 35 push the second meshing part 482 to rotate in the first steering direction, thereby causing the second steering top block 48 to rotate in the first steering direction. The second limiting part 484 pushes the abutting ball 491 and presses the third elastic member 492. When the second steering top block 48 rotates to the point where the second meshing part 482 disengages from the tooth groove of the second gear 35, under the elastic force of the third elastic member 492, the abutting ball 491 will push the second steering top block 48 to reset, and the second meshing part 482 will engage with the second gear 35 again. That is, during the swing stroke of the first steering direction, the second gear 35 does not rotate.

[0062] For further details, please refer to... Figure 2 In one embodiment, the lifting assembly 2 includes a lifting body 21 and a supporting body 22. The lifting body 21 is installed in the first receiving cavity 11. A rack 23 is formed at the end of the lifting body 21 near the first gear 32. The supporting body 22 is disposed on the end of the lifting body 21 away from the first gear 32.

[0063] Among them, the lifting body 21 is the structural part of the lifting assembly 2 that connects to the transmission mechanism 3, and the bearing body 22 is the heavy object bearing part of the lifting assembly 2.

[0064] Specifically, the supporting body 22 includes a supporting member connected to the lifting body 21 and a sleeve connected to one end of the supporting member. The sleeve is connected to the end of the lifting body 21 away from the rack 23. The shape of the supporting member includes, but is not limited to, a U-shape, a J-shape, etc., which can be selected according to the actual design requirements. Preferably, the supporting member is J-shaped.

[0065] For further details, please refer to... Figure 1 In one embodiment, the lifting device further includes a cover 6, which is mounted on the bracket 1 to cover the transmission mechanism 3.

[0066] The cover 6 is used to protect the transmission mechanism 3, effectively reducing external wear and tear on the transmission mechanism 3. It is understood that by setting the cover 6, external dust or fine particles can be effectively reduced from falling into the transmission mechanism 3, thereby reducing wear and tear on the transmission mechanism 3 and improving the service life of the lifting device.

[0067] In summary, this invention connects one of the first gear 32 and the second gear 35 to the main shaft 31 via a threaded connection, and the brake wheel 33 is fitted onto the main shaft 31 with a clearance fit. The rotation direction of the second gear 35 is controlled by the steering mechanism 4 in the handle 5. By utilizing the generation and disappearance of friction, the working state of the lifting device can be controlled. This allows the lifting assembly 2 to move stepwise towards or away from the support 1, thereby achieving dynamic adjustment of the lifting device's upward and downward heights. While ensuring the lifting device's labor-saving effect, this invention also improves the ease of use of the lifting device and enhances the user experience.

[0068] The above are only some or preferred embodiments of the present invention. Neither the text nor the drawings should limit the scope of protection of the present invention. All equivalent structural transformations made using the content of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A lifting device, characterized in that, The device includes a bracket, a lifting assembly, a transmission mechanism, a steering mechanism, and a handle. The transmission mechanism includes a main shaft, a first gear, a brake wheel, an elastic brake element, and a second gear. The main shaft is rotatably connected to the bracket. The first gear, the brake wheel, and the second gear are sequentially mounted on the main shaft. One of the first gear and the second gear is threaded to the main shaft. The brake wheel is mounted on the main shaft with clearance fit. The elastic brake element is disposed on the bracket to control the rotation of the brake wheel. A first receiving cavity is formed inside the bracket. The lifting assembly is installed in the first receiving cavity. One end of the lifting assembly has a rack connected to the first gear. A second receiving cavity is formed inside the handle. The handle is connected to the main shaft, and the second gear is located in the second receiving cavity. The steering mechanism is disposed in the second receiving cavity to control the direction of the second gear.

2. The lifting device according to claim 1, characterized in that, The transmission mechanism further includes a friction element, which is mounted on the main shaft with clearance fit. The friction element is located between the brake wheel and the first gear and / or between the brake wheel and the second gear.

3. The lifting device according to claim 1, characterized in that, The spindle includes a threaded portion, a transmission portion, and a mounting portion. The mounting portion is connected between the threaded portion and the transmission portion, and a limiting boss is formed on one end of the mounting portion near the transmission portion.

4. The lifting device according to claim 3, characterized in that, The first gear is threadedly connected to the threaded portion, the transmission portion is square shaft shaped, and the second gear has a square hole that mates with the transmission portion.

5. The lifting device according to claim 3, characterized in that, The second gear is threadedly connected to the threaded portion, and the first gear is integrally formed in the transmission portion.

6. The lifting device according to claim 1, characterized in that, The steering mechanism includes a first steering control component, a first steering block, a first abutment component, a second abutment component, a first elastic component, and a second elastic component; the first abutment component, the second abutment component, and the first steering block are all rotatably connected within the second receiving cavity, and the first steering block is located between the first abutment component and the second abutment component; the first elastic component is connected between the first abutment component and the second receiving cavity, and the second elastic component is connected between the second abutment component and the second receiving cavity; the first steering control component is connected to the first steering block.

7. The lifting device according to claim 1, characterized in that, The steering mechanism includes a second steering control component, a second steering block, and an elastic reset component; the second steering block is rotatably connected to the second receiving cavity; the second steering control component is connected to the second steering block; one end of the second steering block near the second gear forms a meshing portion that engages with the second gear, and the other end of the second steering block away from the second gear forms a limiting portion; the rotation center distance between the second gear and the second steering block is less than the meshing distance between the second gear and the second steering block; one end of the elastic reset component is located within the limiting portion, and the other end of the elastic reset component is connected to the second receiving cavity.

8. The lifting device according to claim 7, characterized in that, The elastic reset member includes a support ball and a third elastic member; the support ball is connected to one end of the third elastic member and is located within the limiting portion; the other end of the third elastic member is connected to the second receiving cavity.

9. The lifting device according to claim 1, characterized in that, The lifting assembly includes a lifting body and a supporting body. The lifting body is installed in the first receiving cavity. A rack is formed at the end of the lifting body near the first gear. The supporting body is disposed on the end of the lifting body away from the first gear.

10. The lifting device according to claim 1, characterized in that, The lifting device also includes a cover, which is mounted on the bracket to cover the transmission mechanism.

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