Lifting device

Abstract

The utility model relates to the technical field of lifting devices, and discloses a lifting device which comprises a base, a workbench, a driving mechanism and a plurality of lifting assemblies. The base and the workbench are oppositely arranged; the driving mechanism is connected to the base; the multiple lifting assemblies are arranged between the base and the workbench and surround the operation opening. One end of the lifting rod is connected to the workbench, and the other end of the lifting rod is in transmission connection with the driving mechanism; the driving mechanism is used for driving the multiple lifting rods to ascend and descend synchronously, and therefore the lifting device can drive the workbench to ascend and descend stably.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, and particularly relates to a lifting device. Background Art

[0002] In the production process of semiconductor devices, a lifting device is required for operation. The current lifting devices are not stable enough and it is difficult to meet the needs of users. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a lifting device capable of driving a workbench to lift stably.

[0004] According to an embodiment of the first aspect of the utility model, the lifting device includes a base, a workbench, a driving mechanism and a plurality of lifting components. The workbench is provided with an operation port; the base and the workbench are oppositely arranged; the driving mechanism is connected to the base; the plurality of lifting components are arranged between the base and the workbench and surround the operation port; the lifting component includes a lifting rod, one end of the lifting rod is connected to the workbench, and the other end is drivingly connected to the driving mechanism; wherein, the driving mechanism is used to drive the plurality of lifting rods to lift synchronously.

[0005] According to the embodiment of the utility model, the lifting device has at least the following beneficial effects: the base and the workbench are oppositely arranged, the driving mechanism is connected to the base, and the driving mechanism can be used to drive the lifting components to lift, so as to drive the workbench to lift relative to the base. The plurality of lifting components are arranged between the base and the workbench. The lifting component includes a lifting rod, one end of the lifting rod is connected to the workbench, and the other end is drivingly connected to the driving mechanism. The driving mechanism is used to drive the plurality of lifting rods to lift synchronously. The plurality of lifting rods can be connected to the workbench from different positions to support the workbench from different positions, which helps to drive the workbench to lift more stably.

[0006] According to some embodiments of the utility model, the driving mechanism includes a first transmission member and a second transmission member connected in transmission. The first transmission member is rotatably connected to the base, the second transmission member is connected to the lifting rod, and the first transmission member rotates to drive the second transmission member to move, and the movement of the second transmission member drives the lifting rod to move.

[0007] According to some embodiments of the utility model, the driving mechanism includes a transmission rod and a cam connected to each other. The lifting rod abuts against the cam, and the rotation of the transmission rod drives the rotation of the cam.

[0008] According to some embodiments of the utility model, the cam includes a mounting plane and a cam surface, and the lifting rod abuts against the cam surface.

[0009] According to some embodiments of the utility model, the lifting device further includes a mounting seat connected to the base; the mounting seat is provided with a receiving groove, and the cam is located in the receiving groove.

[0010] According to some embodiments of the utility model, the driving mechanism is located on a side of the base away from the workbench, and the lifting rod is movably arranged on the base.

[0011] According to some embodiments of the utility model, the lifting device also includes a handle, which is connected to the transmission rod, and the handle is used to drive the transmission rod to rotate; or, the lifting device also includes an electric drive component, the transmission rod is connected to the driving end of the electric drive component, and the electric drive component is used to drive the transmission rod to rotate.

[0012] According to some embodiments of the utility model, the lifting assembly includes a guide seat, which is connected to the base and located between the base and the workbench; the lifting rod is movably arranged through the guide seat.

[0013] According to some embodiments of the utility model, the lifting device includes four lifting components distributed around the working port, and correspondingly, the driving mechanism includes four cams; the four lifting components are respectively named as the first lifting component, the second lifting component, the third lifting component and the fourth lifting component, and the four cams are respectively named as the first cam, the second cam, the third cam and the fourth cam; the lifting rod of the first lifting component abuts against the first cam, the lifting rod of the second lifting component abuts against the second cam, the lifting rod of the third lifting component abuts against the third cam, and the lifting rod of the fourth lifting component abuts against the fourth cam; the first cam and the second cam are both connected to the transmission rod; the driving mechanism also includes two crank transmission components, the third cam and the fourth cam are respectively connected to the two crank transmission components; the two crank transmission components are both connected to the transmission rod, and the rotation of the transmission rod drives the two crank transmission components to move, so as to drive the third cam and the fourth cam to rotate.

[0014] According to some embodiments of the utility model, the crank transmission assembly includes a first crank, a second crank, a connecting rod and a rotating shaft; the first crank is connected to the transmission rod, the second crank is connected to the rotating shaft, the connecting rod is hinged between the first crank and the second crank, and the rotating shaft is rotatably connected to the base; the rotation of the transmission rod drives the first crank to rotate, and the rotation of the first crank drives the second crank to rotate through the connecting rod to drive the rotating shaft to rotate; the third cam and the fourth cam are respectively connected to the rotating shafts of the two crank transmission assemblies.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 The figure shows a schematic structural diagram of a lifting device provided in an embodiment of the utility model.

[0018] Figure 2 shows Figure 1 the exploded structural schematic diagram of the lifting device in

[0019] Figure 3 shows Figure 1 the partial structural schematic diagram of the lifting device in

[0020] Figure 4 shows Figure 3 the enlarged structural schematic diagram at position Ⅳ in

[0021] Reference numerals:

[0022] lifting device 100;

[0023] base 110; accommodation space 111; workbench 120; operation opening 121;

[0024] drive mechanism 130; transmission rod 131;

[0025] cam 133; cam surface 1331; mounting plane 1333;

[0026] crank drive assembly 135; first crank 1351; second crank 1353; connecting rod 1355; rotating shaft 1357; first crank drive assembly 1359; second crank drive assembly 1361;

[0027] lifting assembly 150; lifting rod 151; guide seat 153; first lifting assembly 157; second lifting assembly 159; third lifting assembly 161; fourth lifting assembly 163;

[0028] support feet 170; mounting seat 180; accommodation groove 181; handle 190. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0031] In the description of the present utility model, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", and "exceeding" do not include the corresponding number, while understandings such as "above", "below", and "within" include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0032] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0033] In the description of the present utility model, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Please refer to Figures 1 to 2 , the embodiment of the present application provides a lifting device 100, and the lifting device 100 can be used to drive an object to lift so as to operate on the object.

[0035] The lifting device 100 includes a base 110, a workbench 120, a driving mechanism 130, and a plurality of lifting components 150.

[0036] Among them, the base 110 and the workbench 120 are arranged opposite to each other. The base 110 can be used to install the driving mechanism 130 and the lifting components 150. The base 110 can be used to place the workpiece to be processed.

[0037] The workbench 120 can be used to lift relative to the base 110, and the workbench 120 can be used to place the processing device.

[0038] The workbench 120 can be provided with an operation opening 121, and the operation opening 121 can penetrate the workbench. The operation opening 121 can provide an operation space for the processing device to operate on the workpiece to be processed. For example, the processing device can extend into the operation opening 121 to operate on the workpiece to be processed on the base 110.

[0039] The operation port 121 can penetrate the workbench 120, and the operation port 121 can also extend to the side of the workbench 120 to penetrate one side of the workbench 120. The operation port 121 can be a circular port, an oval port, a polygonal port or other shapes.

[0040] The operation port 121 can be generally arranged at the center position of the workbench 120 so that a plurality of lifting components 150 can more stably support the workbench 120. Or the operation port 121 can also be arranged at other positions of the workbench 120, which can be specifically designed according to requirements.

[0041] The lifting component 150 can be used to support the workbench 120.

[0042] The driving mechanism 130 is connected to the base 110. The driving mechanism 130 can be used to drive the lifting component 150 to lift, so as to drive the workbench 120 to lift relative to the base 110.

[0043] A plurality of lifting components 150 are arranged between the base 110 and the workbench 120. The plurality of lifting components 150 can support the workbench 120 from different positions to drive the workbench 120 to lift stably. Among them, a plurality can refer to two or more. In some other embodiments, the lifting device 100 can also include only one lifting component 150.

[0044] The plurality of lifting components 150 can be arranged around the operation port 121 to support the workbench 120 from multiple positions, which helps to drive the workbench 120 to lift stably.

[0045] The lifting component 150 includes a lifting rod 151. One end of the lifting rod 151 is connected to the workbench 120, and the other end is drivingly connected to the driving mechanism 130. The driving mechanism 130 is used to drive a plurality of lifting rods 151 to lift synchronously. The plurality of lifting rods 151 can be connected to the workbench 120 from different positions to support the workbench 120 from different positions, which helps to drive the workbench 120 to lift more stably.

[0046] Specifically, when the plurality of lifting rods 151 lift synchronously, the distance between the workbench 120 and the base 110 can be changed. When the plurality of lifting rods 151 rise, the workbench 120 can be driven to rise away from the base 110. When the plurality of lifting rods 151 descend, the workbench 120 can be driven to descend close to the base 110.

[0047] For the convenience of description, the following takes one lifting component 150 as an example for explanation.

[0048] In some embodiments, the driving mechanism 130 may be located on the side of the base 110 facing away from the workbench 120, and the lifting rod 151 is movably disposed through the base 110, which helps to make full use of the space below the base 110, thereby improving the utilization rate of the space above the base 110.

[0049] As an example, the lifting device 100 may further include a plurality of support feet 170. The plurality of support feet 170 may be disposed on the side of the base 110 facing away from the workbench 120 to stably support the base 110. It can be understood that since a plurality of support feet 170 are provided below the base 110, a receiving space 111 may be formed below the base 110, and the driving mechanism 130 may be disposed in the receiving space 111. The base 110 may be provided with a plurality of through holes, and the plurality of through holes and the plurality of lifting rods 151 may correspond one by one. The lifting rod 151 is movably disposed through the through holes to facilitate the driving mechanism 130 to drive the lifting rod 151 to move up and down.

[0050] In some embodiments, the driving mechanism 130 may include a first transmission member and a second transmission member that are in transmission connection. The first transmission member is rotatably connected to the base 110, and the second transmission member is connected to the lifting rod 151. The first transmission member rotates to drive the second transmission member to move, and the movement of the second transmission member can drive the lifting rod 151 to move, thereby driving the workbench 120 to move up and down.

[0051] Among them, there are various selection methods for the first transmission member and the second transmission member.

[0052] As an example, the driving mechanism 130 may adopt a worm and worm gear transmission mechanism. Among them, the first transmission member may adopt a worm wheel, and the second transmission member may adopt a worm. The worm wheel is rotatably connected to the base 110, and the worm may be connected to one end of the lifting rod 151. When the worm wheel rotates, it can drive the worm to move, and when the worm moves, it can drive the lifting rod 151 to move synchronously.

[0053] It should be noted that the first transmission member and the second transmission member may be in direct contact; other structural members may also be provided between the first transmission member and the second transmission member, and the structural member may convert the rotational motion of the first transmission member into a linear motion of the second transmission member, so that the movement of the second transmission member can drive the lifting rod 151 to move up and down.

[0054] Please refer to Figures 2 to 4, in some embodiments, the driving mechanism 130 may include a transmission rod 131 and a cam 133 connected thereto. The lifting rod 151 may abut against the cam 133. When the transmission rod 131 rotates, it can drive the cam 133 to rotate. When the cam 133 rotates, the lifting rod 151 can be made to abut against different positions on the outer peripheral surface of the cam 133, thereby driving the lifting rod 151 to move up and down. In addition, using the cam 133 to drive the lifting rod 151 to move up and down has a relatively simple structure and high transmission accuracy, and can drive the workbench 120 to move up and down by a small distance, meeting the different needs of users.

[0055] In some embodiments, the lifting device 100 may further include a mounting seat 180. The mounting seat 180 may be connected to the base 110. For example, the mounting seat 180 and the base 110 may be fixedly connected by fixing members. Among them, the fixing members may be screws, bolts, rivets or other fixing structures.

[0056] The mounting seat 180 may be provided with a receiving groove 181. The cam 133 may be located in the receiving groove 181. The mounting seat 180 can protect the cam 133, and also helps to prevent the cam 133 from interfering with other structures, facilitating the smooth rotation of the cam 133.

[0057] As an example, the transmission rod 131 is rotatably passed through the base 110, and the cam 133 may be connected to the transmission rod 131 located in the receiving groove 181, so that the transmission rod 131 can drive the cam 133 to rotate smoothly in the receiving groove 181. It can be understood that the mounting seat 180 can also be used to support the transmission rod 131 to support the driving mechanism 130.

[0058] In some embodiments, the mounting seat 180 may be connected to the side of the base 110 facing away from the workbench 120, which helps to make full use of the space below the base 110, thereby improving the utilization rate of the space above the base 110.

[0059] As an example, the mounting seat 180 may be located in the receiving space 111 below the base 110 and connected to the base 110.

[0060] In some embodiments, the cam 133 may include a cam 133 surface. The lifting rod 151 may abut against the cam 133 surface. When the cam 133 rotates, the lifting rod 151 can be made to abut against different positions on the cam 133 surface to drive the lifting rod 151 to move up and down.

[0061] Among them, the cam 133 surface may be an arc surface, an inclined surface or other surfaces. The cam 133 surface may refer to a continuous surface, or the cam 133 surface may also be composed of a plurality of connected surfaces. Among the plurality of surfaces, there may be arc surfaces and inclined surfaces, which can be specifically designed according to requirements.

[0062] As an example, in the implementation of the present application, the cam 133 and the transmission shaft can be eccentrically connected, and the surface of the cam 133 can be an arc surface. In this way, when the cam 133 rotates, the lifting rod 151 can be made to abut against different positions of the arc surface. Since the cam 133 and the transmission rod 131 are eccentrically arranged, the lifting rod 151 can be driven to move up and down.

[0063] In some embodiments, the cam 133 may further include a mounting plane 1333, and the mounting plane 1333 can enable multiple cams 133 to have a determined initial mounting position, which helps multiple cams 133 to drive multiple lifting rods 151 to move up and down synchronously.

[0064] As an example, when installing the cam 133, the mounting plane 1333 of the cam 133 can face the bottom surface of the receiving groove 181, so that the cam 133 can have a relatively determined mounting position, and each lifting rod 151 can generally abut against the same position of the corresponding cam 133, so that multiple cams 133 can drive multiple lifting rods 151 to move up and down synchronously.

[0065] In some embodiments, the lifting device 100 may further include a handle 190. The handle 190 can be connected to the transmission rod 131, and the handle 190 can be used to drive the transmission rod 131 to rotate, so as to facilitate the operation of the staff. The staff can hold the handle 190 to freely control the rotation angle and rotation direction of the transmission rod 131, so as to freely adjust the position of the workbench 120, which provides convenience for the staff.

[0066] In some embodiments, the lifting device 100 may further include an electric driving member. The transmission rod 131 can be connected to the driving end of the electric driving member, and the electric driving member can be used to drive the transmission rod 131 to rotate, so that manual operation by the user is not required.

[0067] As an example, the electric driving member can be a motor or other rotational driving devices.

[0068] In some embodiments, the lifting assembly 150 may further include a guide seat 153. The guide seat 153 can be connected to the base 110 and is located between the base 110 and the workbench 120. The lifting rod 151 is movably disposed through the guide seat 153. The guide seat 153 can be used to guide the lifting rod 151, so that the lifting rod 151 can move in a straight line, which helps to avoid the situation that the moving direction of the lifting rod 151 deviates, and thus helps to drive the workbench 120 to move up and down stably.

[0069] Wherein, the moving direction (i.e., the lifting direction) of the lifting rod 151 is substantially parallel to the vertical direction.

[0070] In some embodiments, the lifting device 100 may include four lifting components 150 distributed around the operation opening 121. Correspondingly, the driving mechanism 130 may include four cams 133. The lifting components 150 and the cams 133 may correspond one by one. The four lifting components 150 may be spaced apart to stably support the workbench 120 from four positions, which helps to drive the workbench 120 to lift and lower stably.

[0071] As an example, the shape of the workbench 120 is generally quadrilateral, and the four lifting components 150 may be distributed at the four corners of the workbench 120.

[0072] In some embodiments, the four lifting components 150 may be respectively named the first lifting component 157, the second lifting component 159, the third lifting component 161, and the fourth lifting component 163, and the four cams 133 may be respectively named the first cam, the second cam, the third cam, and the fourth cam.

[0073] Among them, the lifting rod 151 of the first lifting component 157 abuts against the first cam, the lifting rod 151 of the second lifting component 159 abuts against the second cam, the lifting rod 151 of the third lifting component 161 abuts against the third cam, and the lifting rod 151 of the fourth lifting component 163 abuts against the fourth cam.

[0074] The first cam, the second cam, the third cam, and the fourth cam may rotate synchronously to drive the four lifting rods 151 to lift and lower synchronously, so as to drive the workbench 120 to lift and lower synchronously.

[0075] Both the first cam and the second cam may be connected to the transmission rod 131. When the transmission rod 131 rotates, it may drive the first cam and the second cam to rotate synchronously, so as to drive the first lifting component 157 and the second lifting component 159 to lift and lower synchronously, that is, drive the two lifting rods 151 (the lifting rod 151 of the first lifting component 157 and the lifting rod 151 of the second lifting component 159) to lift and lower synchronously.

[0076] The drive mechanism 130 may further include two crank drive assemblies 135. The third cam and the fourth cam may be respectively connected to the two crank drive assemblies 135. Both of the two crank drive assemblies 135 are in transmission connection with the transmission rod 131. The rotation of the transmission rod 131 drives the two crank drive assemblies 135 to move, so as to drive the third cam and the fourth cam to rotate. In this way, when the transmission rod 131 rotates, it can drive the two crank drive assemblies 135 to move, so as to drive the third cam and the fourth cam to rotate. Thus, the first cam, the second cam, the third cam and the fourth cam can rotate synchronously, so as to drive the four lifting assemblies 150 to lift synchronously, that is, drive the four lifting rods 151 (the lifting rod 151 of the first lifting assembly 157, the lifting rod 151 of the second lifting assembly 159, the lifting rod 151 of the third lifting assembly 161 and the lifting rod 151 of the fourth lifting assembly 163) to lift synchronously, thereby driving the workbench 120 to lift stably.

[0077] In some embodiments, the crank drive assembly 135 may include a first crank 1351, a second crank 1353, a connecting rod 1355 and a rotating shaft 1357.

[0078] Wherein, the first crank 1351 may be connected to the transmission rod 131. When the transmission rod 131 rotates, it can drive the first crank 1351 to rotate synchronously.

[0079] The second crank 1353 is connected to the rotating shaft 1357. The rotating shaft 1357 is rotatably connected to the base 110. The connecting rod 1355 is hinged between the first crank 1351 and the second crank 1353. The rotation of the transmission rod 131 can drive the first crank 1351 to rotate. The rotation of the first crank 1351 can drive the second crank 1353 to rotate through the connecting rod 1355, so as to drive the rotating shaft 1357 to rotate. The third cam and the fourth cam are respectively connected to the rotating shafts 1357 of the two crank drive assemblies 135. The rotation of the rotating shaft 1357 can drive the third cam and the fourth cam to rotate synchronously, so that the first cam, the second cam, the third cam and the fourth cam can rotate synchronously.

[0080] Specifically, the rotation of the first crank 1351 can drive the connecting rod 1355 to move. The movement of the connecting rod 1355 can drive the second crank 1353 to rotate. The rotation of the second crank 1353 can drive the rotating shaft 1357 to rotate.

[0081] As an example, the two crank drive assemblies 135 may include a first crank drive assembly 135 and a second crank drive assembly 135. The first crank drive assembly 135 may be disposed between the first lifting assembly 157 and the fourth lifting assembly 163. The fourth cam may be connected to the rotating shaft 1357 of the first crank drive assembly 135.

[0082] The second crank drive assembly 135 can be disposed between the second lifting assembly 159 and the third lifting assembly 161. The third cam can be connected to the rotating shaft 1357 of the second crank drive assembly 135.

[0083] In some embodiments, the connecting rod 1355 can include a first end and a second end. The first end can be hinged to the first crank 1351, and the second end can be hinged to the second crank 1353.

[0084] The first end can be provided with a first avoidance groove, and the first avoidance groove can be used to avoid the transmission rod 131.

[0085] The second end can be provided with a second avoidance groove, and the second avoidance groove can be used to avoid the rotating shaft 1357.

[0086] It can be understood that in the embodiments of the present application, the workbench 120 can be adjusted by a small distance, and the transmission rod 131 does not need to rotate a full circle. Therefore, the transmission rod 131 can rotate back and forth left and right, driving the first crank 1351 to swing back and forth. The first avoidance groove can avoid the transmission rod 131 to prevent interference between the connecting rod 1355 and the transmission rod 131. The back-and-forth swing of the first crank 1351 can drive the second crank 1353 to swing back and forth through the connecting rod 1355, and the second avoidance groove can avoid the rotating shaft 1357 to prevent interference between the connecting rod 1355 and the rotating shaft 1357.

[0087] In the lifting device 100 provided by the embodiments of the present application, the base 110 and the workbench 120 are disposed opposite to each other. The driving mechanism 130 is connected to the base 110. The driving mechanism 130 can be used to drive the lifting assembly 150 to lift, so as to drive the workbench 120 to lift relative to the base 110. A plurality of lifting assemblies 150 are disposed between the base 110 and the workbench 120. The lifting assembly 150 includes a lifting rod 151. One end of the lifting rod 151 is connected to the workbench 120, and the other end is drivingly connected to the driving mechanism 130. The driving mechanism 130 is used to drive a plurality of lifting rods 151 to lift synchronously. The plurality of lifting rods 151 can be connected to the workbench 120 from different positions to support the workbench 120 from different positions, which helps to drive the workbench 120 to lift more stably.

[0088] The above has described in detail the embodiments of the present invention in conjunction with the drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A lifting device, characterized in that: include: A base and a workbench are arranged opposite to each other, and the workbench is provided with a working opening; A driving mechanism connected to the base; as well as A plurality of lifting assemblies, wherein the plurality of lifting assemblies are arranged between the base and the workbench and surround the working opening; the lifting assemblies include a lifting rod, one end of which is connected to the workbench and the other end of which is connected to the driving mechanism in a transmission manner; Wherein, the driving mechanism is used to drive the multiple lifting rods to rise and fall synchronously.

2. The lifting device according to claim 1, characterized in that: The driving mechanism includes a first transmission member and a second transmission member that are transmission-connected, wherein the first transmission member is rotatably connected to the base, and the second transmission member is connected to the lifting rod. The first transmission member rotates to drive the second transmission member to move, and the movement of the second transmission member drives the lifting rod to move.

3. The lifting device according to claim 1, characterized in that: The driving mechanism comprises a transmission rod and a cam connected to each other, the lifting rod abuts against the cam, and the rotation of the transmission rod drives the cam to rotate.

4. The lifting device according to claim 3, characterized in that: The cam comprises a mounting plane and a cam surface, and the lifting rod abuts against the cam surface.

5. The lifting device according to claim 3, characterized in that: The lifting device also includes a mounting seat, which is connected to the base; the mounting seat is provided with a receiving groove, and the cam is located in the receiving groove.

6. The lifting device according to claim 1, characterized in that: The driving mechanism is located at a side of the base away from the workbench, and the lifting rod is movably arranged on the base.

7. The lifting device according to claim 3, characterized in that: The lifting device further comprises a handle, the handle being connected to the transmission rod, and the handle being used to drive the transmission rod to rotate; Alternatively, the lifting device further comprises an electric drive component, the transmission rod is connected to a driving end of the electric drive component, and the electric drive component is used to drive the transmission rod to rotate.

8. The lifting device according to claim 1, characterized in that: The lifting assembly comprises a guide seat, which is connected to the base and located between the base and the workbench; the lifting rod is movably arranged through the guide seat.

9. The lifting device according to claim 3, characterized in that: The lifting device includes four lifting components distributed around the working port, and correspondingly, the driving mechanism includes four cams; The four lifting assemblies are respectively named as a first lifting assembly, a second lifting assembly, a third lifting assembly and a fourth lifting assembly, and the four cams are respectively named as a first cam, a second cam, a third cam and a fourth cam; The lifting rod of the first lifting assembly abuts against the first cam, the lifting rod of the second lifting assembly abuts against the second cam, the lifting rod of the third lifting assembly abuts against the third cam, and the lifting rod of the fourth lifting assembly abuts against the fourth cam; The first cam and the second cam are both connected to the transmission rod; The driving mechanism also includes two crank transmission assemblies, and the third cam and the fourth cam are respectively connected to the two crank transmission assemblies; the two crank transmission assemblies are both connected to the transmission rod, and the rotation of the transmission rod drives the two crank transmission assemblies to move, thereby driving the third cam and the fourth cam to rotate.

10. The lifting device according to claim 9, characterized in that: The crank transmission assembly comprises a first crank, a second crank, a connecting rod and a rotating shaft; The first crank is connected to the transmission rod, the second crank is connected to the rotating shaft, the connecting rod is hinged between the first crank and the second crank, and the rotating shaft is rotatably connected to the base; the rotation of the transmission rod drives the first crank to rotate, and the rotation of the first crank drives the second crank to rotate through the connecting rod, so as to drive the rotating shaft to rotate; The third cam and the fourth cam are respectively connected to the rotating shafts of the two crank transmission assemblies.

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