Jacking device

Abstract

The application provides a jacking device. The jacking device comprises a base, a jacking part and a rotating part. The jacking part is arranged on the base and is movable relative to the base along a first direction. The jacking part has a rack part extending along the first direction. The rotating part is arranged on the base and is rotatable relative to the base about a second direction. The second direction has an included angle with the first direction. The rotating part has a driving tooth. In a projection plane orthogonal to the second direction, the projection of the driving tooth is a spiral line. The driving tooth is used for meshing with the rack part. In a projection plane parallel to the first direction and the second direction, the projection of the driving tooth overlaps with the projection of the rack part at one end of the first direction, and the projection of the driving tooth is arranged at intervals with the projection of the rack part at the other end of the first direction. The jacking device drives the jacking part to move through the meshing of the driving tooth of the rotating part and the rack part of the jacking part, and has a simple structure.

Description

Technical Field

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

[0002] A jack is a small, lightweight lifting device that uses a rigid lifting component as its working device to lift heavy objects within a short stroke via a top support or bottom claw. Jacks are classified into screw jacks, hydraulic jacks, and electric jacks. Screw jacks require a brake, hydraulic jacks require hydraulic components, and electric jacks require a pressure-holding device. Therefore, jacks in these technologies all have complex structures. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a lifting device that drives the lifting member to move by the engagement of the driving teeth of the rotating part with the rack part of the lifting member, and the structure is simple.

[0004] The lifting device of this invention includes:

[0005] Base;

[0006] A lifting member is disposed on the base and is movable relative to the base in a first direction, the lifting member having a rack portion extending in the first direction;

[0007] A rotating part is disposed on the base and is rotatable relative to the base around a second direction, which has an angle with the first direction. The rotating part has driving teeth. In a projection plane orthogonal to the second direction, the projection of the driving teeth is a spiral shape. The driving teeth are used to mesh with the rack part. In a projection plane parallel to the first and second directions, the projection of the driving teeth overlaps with the projection of the rack part at one end in the first direction, and the projection of the driving teeth is spaced apart from the projection of the rack part at the other end in the first direction.

[0008] The lifting device of this invention uses the drive teeth of the rotating part to mesh with the rack part of the lifting member, so that the cylinder drives the lifting member to move through the rotation of the rotating part. The drive teeth and the rack part can be self-locking so that the position of the lifting member relative to the base can be maintained, thereby realizing the lifting function. The lifting device of this invention has a simple structure.

[0009] In some embodiments, the drive tooth has a first end and a second end disposed in the extending direction of the drive tooth, the first end and the second end being arranged at a distance in the radial direction of the rotating part, and the second end being located between the first end and the axis of the rotating part, and the teeth of the rack portion can pass through the space between the first end and the second end.

[0010] In some embodiments, the drive tooth rotates around the second direction once.

[0011] In some embodiments, the lifting device further includes a first driving assembly disposed on the base, the rotating part being connected to the first driving assembly and being able to move between an engaged position and a disengaged position under the drive of the first driving assembly. In the engaged position, the driving teeth engage with the rack portion, and in the disengaged position, the driving teeth disengage from the rack portion.

[0012] In some embodiments, the first driving component includes:

[0013] A bracket having a third end and a fourth end disposed opposite to each other in a second direction, a rotating part disposed on the fourth end, and the rotating part being rotatable about the second direction relative to the bracket;

[0014] A hinge shaft, the axis of which is orthogonal to the first direction and the second direction, the fourth end and the base are hinged together by the hinge shaft, and the hinge shaft and the rotating part are arranged at intervals in the first direction;

[0015] A pusher is provided on the third end and is connected to the base. The pusher can drive the third end to move away from and toward the base so that the bracket rotates about the hinge axis and the rotating part rotates between the engagement position and the disengagement position.

[0016] In some embodiments, the pusher is a first handle, one end of which has a cam. The cam is hinged to the third end and is rotatable about the third direction relative to the third end. The third direction is orthogonal to the first direction and the second direction. The curved surface of the cam abuts against the base.

[0017] In some embodiments, in the engagement position, the angle between the second direction and the first direction is an acute angle, and in the disengagement position, the second direction and the first direction are orthogonal.

[0018] In some embodiments, the bracket has an installation space extending through the bracket in a first direction, and the base passes through the installation space.

[0019] In some embodiments, the lifting device further includes a second drive assembly connected to the rotating part to drive the rotating part to rotate relative to the base about the second direction.

[0020] In some embodiments, the second drive component is a second handle, the rotating part is disc-shaped, the length of the second handle is greater than the radius of the rotating part, the rotating part has the drive tooth at one end in the second direction, the other end of the rotating part in the second direction is connected to one end of the second handle, and one end of the second handle is located on the rotation axis of the rotating part, and the other end of the second handle is a handheld part. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the lifting device in the engagement position according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the drive tooth structure in an embodiment of the present invention;

[0023] Figure 3 This is an exploded view of the lifting device according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the lifting device in the disengaged position according to an embodiment of the present invention.

[0025] Figure label:

[0026] 1. Base; 2. Lifting component; 21. Rack and pinion; 3. Rotating component; 31. Drive gear; 311. First end; 312. Second end; 4. First drive assembly; 41. Bracket; 42. Hinge shaft; 43. Pushing component; 431. Cam; 5. Second drive assembly; 51. Handheld component. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The following is for reference. Figures 1-4 A lifting device according to an embodiment of the invention is described.

[0029] like Figures 1-4 As shown, the lifting device of this embodiment includes a base 1, a lifting member 2, and a rotating part 3.

[0030] The lifting member 2 is mounted on the base 1, and the lifting member 2 is movable relative to the base 1 along a first direction. The lifting member 2 has a first direction (e.g., Figure 1The rack portion 21 extends in the vertical direction (as shown). The rotating portion 3 is provided on the base 1 and can rotate about a second direction relative to the base 1. The second direction has an angle with the first direction. The rotating portion 3 has a driving tooth 31. In the projection plane orthogonal to the second direction, the projection of the driving tooth 31 is a spiral line shape. The driving tooth 31 is used to mesh with the rack portion 21. In the projection plane parallel to the first and second directions, one end of the projection of the driving tooth 31 in the first direction overlaps with the projection of the rack portion 21, and the other end of the projection of the driving tooth 31 in the first direction is spaced apart from the projection of the rack portion 21.

[0031] like Figures 1-4 As shown, the base 1 includes a frame and a base. The frame extends in the vertical direction and is hollow inside to form the inner cavity of the base 1. The base is located at the bottom of the frame, and the cross-sectional area of ​​the base is larger than that of the frame. Reinforcing ribs are also provided between the frame and the base.

[0032] The lifting member 2 is a strip extending in the vertical direction. The right end face of the lifting member 2 has a rack portion 21, which extends in the vertical direction. Specifically, the rack portion 21 has multiple teeth, which are spaced apart in the vertical direction, and each tooth extends in the front-back direction. The top end of the lifting member 2 is preferably a downward-protruding arc-shaped tray for supporting and abutting the lifted component. The bottom end of the lifting member 2 is inserted into the inner cavity of the base 1, and the lifting member 2 can move vertically relative to the base 1.

[0033] The rotating part 3 is preferably disc-shaped, mounted on the base 1, and rotatable relative to the base 1 around its rotation axis. Figure 1 In this configuration, the rotation axis of the rotating part 3 extends from left to right and is inclined upwards, with an acute angle between the rotation axis of the rotating part 3 and the vertical direction. The left end face of the rotating part 3 has a protruding drive tooth 31, such as... Figure 2 The drive tooth 31 is spiral-shaped and is arranged around the rotation axis of the rotating part 3. Figure 1 As shown, within the projection plane formed in the vertical and horizontal directions, the upper part of the projection of the drive tooth 31 overlaps with the projection of the rack 21, and the lower part of the projection of the drive tooth 31 is spaced apart from the projection of the rack 21 in the horizontal direction. In other words, the upper end of the drive tooth 31 meshes with the teeth of the rack 21, and the lower end of the drive tooth 31 disengages from the teeth of the rack 21, so that the rotating part 3, during its rotation around its own axis of rotation, pushes the rack 21 to move in the vertical direction through the drive tooth 31, thereby achieving a lifting effect.

[0034] like Figure 1 and Figure 2 As shown, preferably, the rotating part 3 along... Figure 2 Rotate counterclockwise as shown, along Figure 2During the counterclockwise rotation shown, the outer peripheral surface of the drive tooth 31 always abuts against the lower end face of the tooth of the rack portion 21, and as the drive tooth 31 rotates along... Figure 2 As shown, when rotated counterclockwise, the teeth of the rack section 21 sequentially abut against the drive teeth 31 from top to bottom. In other words, the upper teeth of the rack section 21 abut against the drive teeth 31 first, and as the drive teeth 31 rotate counterclockwise... Figure 2 As shown in the counterclockwise rotation, the upper tooth is pushed upward by the drive tooth 31 and then disengages from the drive tooth 31. Simultaneously or before the upper tooth disengages from the drive tooth 31, the next lower tooth abuts against the drive tooth 31, thereby allowing the lifting member 2 to move along with the rotating part 3. Figure 2 It rises by rotating counterclockwise as shown. Similarly, when the rotating part 3 moves along... Figure 2 When rotated clockwise as shown, the lifting member 2 can move along with the rotating part 3. Figure 2 The lifting member 2 descends by rotating clockwise as shown. Since the lower end of the drive tooth 31 and the teeth of the rack portion 21 are spaced apart in the left-right direction, the teeth below the meshing position of the rack portion 21 and the drive tooth 31 will not interfere with the drive tooth 31, ensuring that the lifting member 2 can move smoothly in the up-down direction. Simultaneously, the rack portion 21 and the drive tooth 31 can achieve self-locking; when the driving force for the rotating part 3 to rotate around its own rotation axis disappears, the weight of the lifted member carried by the lifting member 2 will not drive the drive tooth 31 to rotate.

[0035] The lifting device of this invention uses a drive tooth of a rotating part to mesh with a rack part of the lifting member. The cylinder drives the lifting member to move through the rotation of the rotating part, and the drive tooth and rack part are self-locking to maintain the position of the lifting member relative to the base, thus achieving the lifting function. Compared with jacks in related technologies, the lifting device of this invention has a simpler structure, lower production process and cost, smaller footprint, and is easier to carry.

[0036] It is understood that the structure of the rotating part is not limited to the upper end of the drive tooth meshing with the rack portion. In other embodiments, the lower end of the drive tooth meshes with the rack portion, and the upper end of the drive tooth and the rack portion are spaced apart in the left-right direction.

[0037] It is understood that the lifting member is not limited to moving in the vertical direction. In other embodiments, the lifting member can move in any direction depending on the orientation of the lifting device.

[0038] In some embodiments, the drive tooth 31 has a first end 311 and a second end 312 disposed in the extending direction of the drive tooth 31. The first end 311 and the second end 312 are arranged at intervals in the radial direction of the rotating part 3, and the second end 312 is located between the first end 311 and the axis of the rotating part 3. The teeth of the rack part 21 can pass through the space between the first end 311 and the second end 312.

[0039] In some embodiments, the drive tooth 31 rotates once around the second direction.

[0040] like Figure 2 As shown, the drive tooth 31 is spiral-shaped, and the drive tooth 31 has a first end 311 and a second end 312 along the extension direction of the spiral shape. The drive tooth 31 extends from the second end 312 along... Figure 2 The first end 311 and the second end 312 are arranged at intervals in the radial direction of the rotating part 3, with the second end 312 located between the first end 311 and the axis of the rotating part 3. In other words, the first end 311, the second end 312, and the axis of the rotating part 3 are arranged at intervals in the radial direction of the rotating part 3. Preferably, the drive tooth 31 surrounds the rotation axis of the rotating part 3 for one revolution.

[0041] Around the rotation axis of the rotating part 3 Figure 2 When rotated counterclockwise as shown, the second end 312 abuts against the lower end face of a tooth of the lifting member 2 and cuts into the tooth groove below the tooth, so that the second end 312 meshes with the rack portion 21. As the rotating part 3 rotates, the contact portion between the tooth and the drive tooth 31 moves from the second end 312 to the first end 311, and finally disengages from the first end 311 from the drive tooth 31. In other words, the first end 311 of the drive tooth 31 cuts out from the tooth groove below the tooth, the tooth disengages from the drive tooth 31, and moves above the drive tooth 31. When the first end 311 cuts out from the tooth groove below the tooth, the second end 312 cuts into the tooth groove below the tooth and adjacent to the tooth, so that the drive tooth 31 remains engaged with the lifting member 2. At this time, the other tooth is located between the first end 311 and the second end 312. The rotating part 3 and the drive tooth 31 rotate along the... Figure 2 As shown, rotating counterclockwise for one revolution, the lifting member 2 rises by the width of one tooth of the rack portion 21. With the continuous rotation of the rotating part 3, the lifting member 2 continues to rise. The rotating part 3 and the driving tooth 31 move along... Figure 2 As shown, when the lifting member 2 rotates clockwise for one revolution, it descends by the tooth width of the rack section 21.

[0042] It is understandable that the structure of the drive gear is not limited to... Figure 2 In some embodiments of the structure shown, the drive tooth extends from the second end along... Figure 2 As shown, it extends counterclockwise to the first end, at which point the rotating part rotates along... Figure 2 As shown, rotating counterclockwise one revolution causes the lifting component to descend by the tooth width of one rack section.

[0043] It is understood that the drive tooth is not limited to rotating around the second direction once. In other embodiments, the drive tooth rotates around the second direction less than once, and the first and second ends form a notch in the circumferential direction. The distance between the notch in the front-rear direction is less than the length of the tooth of the rack in the front-rear direction, so that the drive tooth can maintain engagement with the lifting member. Alternatively, the drive tooth rotates around the second direction more than once, and the first and second ends have a sleeved end distance in the circumferential direction. The length of the space formed by the sleeved portion of the first and second ends in the front-rear direction is greater than the length of the tooth of the rack in the front-rear direction, so as to avoid interference between the drive tooth and the rack.

[0044] It is understood that the radially spaced space between the first end and the second end is not limited to just one tooth of the rack portion. In other embodiments, at least two teeth may be located simultaneously in the radially spaced space between the first end and the second end. In this case, there is at least one tooth between the tooth that cuts out and the tooth that cuts in and abuts the second end.

[0045] In some embodiments, the lifting device of the present invention further includes a first driving component 4, which is disposed on the base 1. The rotating part 3 is connected to the first driving component 4 and can move between an engagement position and a disengagement position under the drive of the first driving component 4. In the engagement position, the driving tooth 31 engages with the rack part 21, and in the disengagement position, the driving tooth 31 disengages from the rack part 21.

[0046] like Figure 1 and Figure 4 The lifting device further includes a first drive assembly 4, which is mounted on the base 1. A rotating part 3 is mounted on the first drive assembly 4. The first drive assembly 4 can drive the rotating part 3 to move between an engaged position and a disengaged position. In the engaged position, such as... Figure 1 As shown, the drive tooth 31 meshes with the rack part 21. At this time, the rotating part 3 rotates around its own rotation axis, which can drive the lifting member 2 to move in the vertical direction. In the disengaged position, as shown... Figure 4 As shown, the drive tooth 31 disengages from the rack part 21. At this time, the rotating part 3 rotates around its own rotation axis and cannot drive the lifting member 2 to move in the vertical direction. When the lifting member 2 carries the lifted member, under the action of the gravity of the lifted member, the lifting member 2 can quickly descend, realizing the rapid fall of the lifted member.

[0047] It is understood that the lifting device is not limited to having a first drive component. In some other embodiments, the lifting device does not have a first drive component, the rotating part only has an engagement position, and the lifting member can only move in the vertical direction under the drive of the rotating part.

[0048] In some embodiments, the first drive assembly 4 includes a bracket 41, a hinge 42, and a pusher 43.

[0049] The bracket 41 has a third end and a fourth end that are disposed opposite to each other in the second direction. The rotating part 3 is disposed on the fourth end and can rotate about the second direction relative to the bracket 41.

[0050] like Figure 1 , Figure 3 and Figure 4 As shown, the bracket 41 is mounted on the base. The left end of the bracket 41 is the third end, and the right end of the bracket 41 is the fourth end. The lifting member 2 is located between the left and right ends of the bracket 41. The rotating part 3 is located at the right end of the bracket 41, and the rotating part 3 can rotate relative to the bracket 41 around the rotation axis of the rotating part 3 to drive the lifting member 2 to move in the up and down direction.

[0051] The axial direction of the hinge shaft 42 is orthogonal to the first direction and the second direction. The fourth end and the base 1 are hinged together by the hinge shaft 42. The hinge shaft 42 and the rotating part 3 are arranged at intervals in the first direction.

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, the hinge shaft 42 extends in the front-rear direction. The right end face of the base 1 has a boss for through which the hinge shaft 42 passes. The right end of the bracket 41 is hinged to the base 1 via the hinge shaft 42, allowing the bracket 41 to rotate relative to the base 1 around the hinge shaft 42. This allows the rotating part 3 to rotate between an engaged position and a disengaged position. In the engaged position, the rotating part 3 extends from bottom to top and is tilted to the left. The angle between the rotation axis of the rotating part 3 and the vertical direction is acute, so that the upper end of the drive tooth 31 meshes with the teeth of the rack part 21. In the disengaged position, the rotating part 3 extends from bottom to top, and the rotation axis of the rotating part 3 is orthogonal to the vertical direction. In other words, the second direction is the left-right direction. The drive tooth 31 and the rack part 21 are spaced apart in the left-right direction. The hinge shaft 42 and the rotating part 3 are spaced apart in the vertical direction. Preferably, the rotating part 3 is located at the upper part of the right end of the bracket 41, and the hinge shaft 42 is located at the lower part of the right end of the bracket 41.

[0053] The pusher 43 is provided on the third end and is connected to the base 1. The pusher 43 can drive the third end to move away from and toward the base 1 so that the bracket 41 rotates about the hinge axis 42 and the rotating part 3 rotates between the engagement position and the disengagement position.

[0054] like Figure 1 , Figure 3 and Figure 4 As shown, the pusher 43 is located at the left end of the bracket 41 and abuts against the left end face of the base 1. The pusher 43 can push the left end of the bracket 41 away from and towards the base 1 so that the bracket 41 can rotate around the hinge axis 42.

[0055] Preferably, the bracket 41 is located in the middle of the base 1 in the vertical direction, the rotating part 3 is located below the top surface of the base 1, and the right end face of the base 1 is provided with a hollow groove. The hollow groove and the rack part 21 are arranged opposite to each other in the horizontal direction. In the meshing position, the upper end of the drive tooth 31 extends into the hollow groove and meshes with the tooth of the rack part 21. In the disengagement position, all of the drive teeth 31 are located outside the hollow groove and on the right side of the hollow groove, and the drive teeth 31 are disengaged from the rack part 21.

[0056] It is understood that the base is not limited to having a hollowed-out groove. In other embodiments, the bracket is located at the upper end of the base, the upper end of the rotating part is located above the top surface of the base, and there is no base between the upper end of the drive tooth and the rack part. In this case, the base does not need to be provided with a hollowed-out groove.

[0057] It is understood that, in the disengaged position, the rotation axis of the rotating part is not limited to being orthogonal to the vertical direction. In other embodiments, in the disengaged position, the angle between the rotation axis of the rotating part and the vertical direction can also be an acute angle, as long as the drive teeth and the rack are spaced apart in the left-right direction.

[0058] It is understandable that the structure of the first drive component is not limited to that shown below. Figure 1 In some embodiments of the structure shown, the first drive assembly may be a drive member extending in the left-right direction, such as a telescopic cylinder, a transmission chain, or a linear module. The rotating part may move relative to the base in the left-right direction under the drive of the first drive assembly, so that the rotating part can move between a disengaged position and an engaged position.

[0059] In some embodiments, the pusher 43 is a first handle, one end of which has a cam 431. The cam 431 is hinged to a third end and is rotatable relative to the third end in a third direction (e.g., Figure 3 The cam 431 rotates in the forward and backward directions shown, with the third direction orthogonal to the first and second directions, and the curved surface of the cam 431 abuts against the base 1.

[0060] like Figure 1 , Figure 3 and Figure 4 As shown, the pusher 43 is a first handle, one end of which has a cam 431. The cam 431 is hinged to the left end of the bracket 41, allowing the pusher 43 to rotate relative to the bracket 41 in a front-back direction. The curved surface of the cam 431 abuts against the left end face of the base 1. When the first handle is rotated, when the protrusion of the cam 431 abuts against the base 1, the rotating part 3 is in the engaged position. When the other parts of the cam 431, excluding the protrusion, abut against the base 1, the rotating part 3 is in the disengaged position. Thus, rotating the first handle drives the rotating part 3 to rotate between the engaged and disengaged positions. Preferably, the pusher 43 is located at the upper part of the left end of the bracket 41, so that the bracket 41 can rotate around the hinge axis 42 under force.

[0061] The structure of driving the bracket 41 and the rotating part 3 to rotate by rotating the first handle is relatively simple and has a low manufacturing cost. At the same time, since the first handle has a certain length and the first handle and the cam 431 form a lever structure, when the lifting part 2 carries the lifted part, the user can also push the first handle to move the rotating part 3 to the disengagement position, so that the lifted part can fall back quickly.

[0062] It is understood that the structure of the pusher is not limited to the first handle; in other embodiments, the pusher is a hydraulic telescopic cylinder.

[0063] In some embodiments, the bracket 41 has an installation space extending through the bracket 41 in a first direction, and the base 1 is disposed within the installation space.

[0064] like Figure 1 and 3 As shown, the bracket 41 includes two plates spaced apart front to back. The upper right ends of the two plates are connected by a connecting plate. The rotating part 3 is located on the connecting plate. An installation space is formed between the two plates. The base 1 is inserted into the installation space. The lower right ends of the two plates are respectively provided with ears. The boss of the base 1 is located between the two ears. The hinge shaft 42 is inserted through both the boss and the two ears. The upper left ends of the two plates are provided with through holes. The front and rear ends of the cam 431 are respectively provided with rotating shafts. The rotating shafts are inserted into the through holes on the corresponding sides so that the cam 431 can rotate relative to the bracket 41 in the front-rear direction.

[0065] In some embodiments, the lifting device of the present invention further includes a second driving component 5, which is connected to the rotating part 3 to drive the rotating part 3 to rotate relative to the base 1 about a second direction.

[0066] like Figure 3 As shown, the second drive assembly 5 is connected to the rotating part 3 to drive the rotating part 3 to rotate relative to the base 1 about the rotation axis of the rotating part 3.

[0067] In some embodiments, the second drive assembly 5 is a second handle, the rotating part 3 is disc-shaped, the length of the second handle is greater than the radius of the rotating part 3, the rotating part 3 has a drive tooth 31 at one end in the second direction, the other end of the rotating part 3 in the second direction is connected to one end of the second handle, and one end of the second handle is located on the rotation axis of the rotating part 3, and the other end of the second handle is a handheld part 51.

[0068] like Figure 3As shown, the second drive assembly 5 is a second handle. The left end face of the rotating part 3 has a drive tooth 31, and the right end face of the rotating part 3 has one end of the second handle, which is located on the rotation axis of the rotating part 3. The other end of the second handle is a handheld part 51, which extends a distance in the left-right direction for easy gripping. The second handle and the rotating part 3 can be connected by bolts or can be set as an integral structure. Preferably, the handheld part 51 is provided with an anti-slip rubber sleeve. Preferably, the rotating part 3 is disc-shaped, and the length of the second handle is greater than the radius of the rotating part 3, so that the user can drive the rotating part 3 to rotate by rotating the second handle. The structure of rotating the rotating part 3 by rotating the second handle is relatively simple and has a low manufacturing cost.

[0069] It is understood that the structure of the second drive assembly is not limited to a second handle; in other embodiments, the second drive assembly is a rotary motor mounted on a bracket.

[0070] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly 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," "over," and "on top" of 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.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A lifting device, characterized in that, include: Base (1); A lifting member (2) is provided on the base (1) and the lifting member (2) is movable relative to the base (1) in a first direction. The lifting member (2) has a rack portion (21) extending in the first direction. A rotating part (3) is provided on the base (1) and the rotating part (3) can rotate about a second direction relative to the base (1). The second direction has an angle with the first direction. The rotating part (3) has a driving tooth (31). In the projection plane orthogonal to the second direction, the projection of the driving tooth (31) is a spiral line. The driving tooth (31) is used to mesh with the rack part (21). In the projection plane parallel to the first direction and the second direction, the projection of the driving tooth (31) overlaps with the projection of the rack part (21) at one end in the first direction. The projection of the driving tooth (31) is spaced apart from the projection of the rack part (21) at the other end in the first direction. The drive tooth (31) has a first end (311) and a second end (312) provided in the extending direction of the drive tooth (31). The first end (311) and the second end (312) are arranged at intervals in the radial direction of the rotating part (3), and the second end (312) is located between the first end (311) and the axis of the rotating part (3). The teeth of the rack part (21) can pass through the space between the first end (311) and the second end (312). During rotation, the drive tooth (31) sequentially cuts into and out of different tooth grooves of the rack portion (21) through the first end (311) and the second end (312), so that for every rotation of the drive tooth (31), the lifting member (2) moves one tooth width distance of the rack portion (21).

2. The lifting device according to claim 1, characterized in that, The drive tooth (31) rotates around the second direction once.

3. The lifting device according to any one of claims 1-2, characterized in that, It also includes a first drive assembly (4), which is disposed on the base (1). The rotating part (3) is connected to the first drive assembly (4) and can move between an engagement position and a disengagement position under the drive of the first drive assembly (4). In the engagement position, the drive tooth (31) engages with the rack part (21), and in the disengagement position, the drive tooth (31) disengages from the rack part (21).

4. The lifting device according to claim 3, characterized in that, The first driving component (4) includes: The bracket (41) has a third end and a fourth end that are disposed opposite to each other in the second direction, the rotating part (3) is disposed on the fourth end, and the rotating part (3) is rotatable about the second direction relative to the bracket (41); The hinge shaft (42) has an axial direction orthogonal to the first direction and the second direction. The fourth end and the base (1) are hinged through the hinge shaft (42). The hinge shaft (42) and the rotating part (3) are arranged at intervals in the first direction. A pusher (43) is provided on the third end and is connected to the base (1). The pusher (43) can drive the third end to move away from and toward the base (1) so that the bracket (41) rotates about the hinge axis (42) and the rotating part (3) rotates between the engagement position and the disengagement position.

5. The lifting device according to claim 4, characterized in that, The pusher (43) is a first handle, one end of which has a cam (431). The cam (431) is hinged to the third end and can rotate about a third direction relative to the third end. The third direction is orthogonal to the first direction and the second direction. The curved surface of the cam (431) abuts against the base (1).

6. The lifting device according to claim 4, characterized in that, In the engagement position, the angle between the second direction and the first direction is an acute angle; in the disengagement position, the second direction and the first direction are orthogonal.

7. The lifting device according to claim 4, characterized in that, The bracket (41) has an installation space that extends through the bracket (41) in a first direction, and the base (1) is inserted into the installation space.

8. The lifting device according to claim 1, characterized in that, It also includes a second drive assembly (5), which is connected to the rotating part (3) to drive the rotating part (3) to rotate relative to the base (1) about the second direction.

9. The lifting device according to claim 8, characterized in that, The second drive component (5) is a second handle, the rotating part (3) is disc-shaped, the length of the second handle is greater than the radius of the rotating part (3), the rotating part (3) has the drive tooth (31) at one end in the second direction, the other end of the rotating part (3) is connected to one end of the second handle, and one end of the second handle is located on the rotation axis of the rotating part (3), and the other end of the second handle is a handheld part (51).

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