Lifting device

Abstract

The utility model discloses a lifting device. The lifting device comprises a base; a placing platform; the number of the guide frames is two, and the two guide frames are symmetrically arranged on the two sides of the base; the number of the first transmission mechanisms is two, and the two first transmission mechanisms are symmetrically arranged; each first transmission mechanism comprises a lead screw and a nut, the nuts are arranged on the side edges of the containing platform, and the lead screws are arranged between the base and the top beam of the guide frame and penetrate through the nuts. The second transmission mechanism is arranged between the lead screws of the two first transmission mechanisms and used for enabling the two lead screws to rotate synchronously; the driving mechanism is used for driving any lead screw in the two first transmission mechanisms to rotate; the number of the guide columns is at least one, and the at least one guide column is arranged between the top beam of one guide frame and the base and penetrates through a guide sleeve located on the side edge of the containing platform.

Description

Technical Field

[0001] The utility model relates to the technical field of non-standard equipment design, in particular to a lifting device. Background Art

[0002] In the prior art, a lifting device for adjusting the height of functional equipment (such as displays, medical equipment) generally includes a placement platform for placing the functional equipment and a driving mechanism for driving the placement platform to rise and fall. A transmission mechanism in a typical driving mechanism includes a lead screw and a nut transmission pair powered by a motor. In the prior art, a set of lead screw and nut transmission pairs and a guide column are used to drive the placement platform and guide the placement platform, but the effect is poor, especially when used for lifting functional equipment with heavier weight. Utility Model Content

[0003] In view of the above technical problems existing in the prior art, an embodiment of the utility model provides a lifting device.

[0004] In order to solve the above technical problems, the technical solution adopted in the embodiment of the utility model is:

[0005] A lifting device, comprising:

[0006] Base;

[0007] placing a platform, which is located above the base;

[0008] A guide frame, comprising two guide frames, the two guide frames are symmetrically arranged on both sides of the base; each guide frame has a top beam;

[0009] The first transmission mechanism comprises two first transmission mechanisms, which are symmetrically arranged and correspond to the two guide frames respectively; each first transmission mechanism comprises a lead screw and a nut, the nut is installed on the side of the placement platform, and the lead screw is arranged between the base and the top beam of the guide frame and passes through the nut;

[0010] A second transmission mechanism, which is arranged between the two lead screws of the first transmission mechanism to enable the two lead screws to rotate synchronously;

[0011] A driving mechanism, used for driving any one of the lead screws in the two first transmission mechanisms to rotate;

[0012] The guide column comprises at least one, at least one of which is installed between a top beam of the guide frame and the base and passes through a guide sleeve located on the side of the placement platform.

[0013] Preferably, the second transmission mechanism comprises a synchronous belt and two synchronous wheels;

[0014] A positioning plate is fixed to each side of the bottom of the base by three positioning columns, and the lower end of the lead screw of the first transmission mechanism passes through the base and is rotatably connected to the positioning plate;

[0015] The two synchronous wheels are respectively installed on the lower ends of the two lead screws, and the synchronous belt is sleeved on the two synchronous wheels.

[0016] Preferably, the driving mechanism includes a driving motor and a first gear and a second gear meshing with each other; the driving motor is fixed on the base, the first gear is mounted on the output shaft of the driving motor, and the second gear is mounted on the lower end of one of the lead screws.

[0017] Preferably, the guide frame has a column, and a plurality of proximity switches are arranged at intervals on the column, and the proximity switches control the start and stop of the placement platform by contacting the side of the placement platform.

[0018] Preferably, the guide columns include two, and the two guide columns are respectively arranged between the top beams of the two guide frames and the base.

[0019] Compared with the prior art, the lifting device disclosed in the utility model has the following beneficial effects:

[0020] 1. The lifting device provided by the utility model enables the placement platform to be lifted and lowered smoothly by setting two first transmission mechanisms.

[0021] 2. The lifting device provided by the utility model further enables the placement platform to be lifted and lowered strictly in the vertical direction by arranging two guide columns.

[0022] 3. The lifting device provided by the utility model arranges the second transmission mechanism at the bottom of the base, thereby making the structure of the entire device compact.

[0023] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a lifting device provided in an embodiment of the utility model from one viewing angle.

[0026] Figure 2 A schematic three-dimensional structure diagram of a lifting device provided in an embodiment of the utility model from another perspective.

[0027] Reference numerals:

[0028] 10-placing platform; 20-base; 21-positioning column; 22-positioning plate; 30-guide frame; 31-top beam; 32-column; 40-first transmission mechanism; 41-screw; 42-nut; 43-guide column; 44-guide sleeve; 50-second transmission mechanism; 51-synchronous belt; 52-synchronous wheel; 60-driving mechanism; 61-driving motor; 62-first gear; 63-second gear; 70-proximity switch. DETAILED DESCRIPTION

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the utility model discloses a lifting device, which includes: a base 20, a placement platform 10, a guide frame 30, a guide column 43, a first transmission mechanism 40, a second transmission mechanism 50 and a driving mechanism 60.

[0032] The guide frames 30 include two, the two guide frames 30 are fixedly arranged on both sides of the base 20, and the guide frames 30 are configured into a rectangular structure, that is, the guide frames 30 have two vertical columns 32 and a top beam 31 horizontally placed on the top of the columns 32; the placement platform 10 is located in the area between the two guide frames 30, and the placement platform 10 is used for placing functional devices (such as displays).

[0033] The first transmission mechanism 40 includes two, and the two first transmission mechanisms 40 are respectively located on both sides of the base 20 and correspond to the guide frame 30 respectively; each first transmission mechanism 40 includes a lead screw 41 and a nut 42, and the nut 42 is installed at the side of the placement platform 10, and the lead screw 41 is arranged between the top beam 31 of the guide frame 30 and the base 20, and the lead screw 41 passes through the nut 42 to form a transmission pair, so that the lead screws 41 of the two first transmission mechanisms 40 are respectively passed through the nuts 42 on both sides of the placement platform 10, and the lead screw 41 and the nut 42 are coordinated by rotating the lead screw 41 to drive the placement platform 10 to rise and fall.

[0034] The second transmission mechanism 50 is arranged between the two lead screws 41 of the two first transmission mechanisms 40 to make the two lead screws 41 rotate synchronously. The first transmission mechanism 40 includes: a synchronous belt 51 and two synchronous wheels 52. Specifically, there are three positioning columns 21 on both sides of the bottom of the base 20. The positioning plate 22 is fixed on the three positioning columns 21. A bearing is installed on the positioning plate 22. The lower end of the lead screw 41 passes through the base 20 and is rotatably connected to the positioning plate 22 through the bearing. In this way, the positioning accuracy of the lead screw 41 can be significantly improved through the positioning plate 22. The two synchronous wheels 52 of the second transmission mechanism 50 are respectively installed on the lower ends of the lead screws 41 of the two first transmission mechanisms 40. The synchronous belt 51 of the second transmission mechanism 50 is sleeved on the two synchronous wheels 52. In this way, the two lead screws 41 can achieve synchronous rotation through the second transmission mechanism 50.

[0035] There are two guide columns 43, which are respectively located on both sides of the placement platform 10. Each guide column 43 is located between the base 20 and the top beam 31 of the guide frame 30 and passes through a guide sleeve 44 (or linear bearing) at the side of the placement platform 10. When the placement platform 10 is raised or lowered, the guide column 43 guides the placement platform 10 so that the placement platform 10 is raised or lowered strictly in the vertical direction.

[0036] The transmission mechanism is arranged at a side of the base 20 and adjacent to one of the first transmission mechanisms 40. The transmission mechanism includes a driving motor 61, a first gear 62, and a second gear 63. The driving motor 61 is fixed on the base 20. The first gear 62 is mounted on the output shaft of the driving motor 61. The second gear 63 is mounted on the lower end of the lead screw 41 and is coaxial with the synchronous wheel 52. The first gear 62 is meshed with the second gear 63, so that the lead screw 41 can be driven to rotate by the driving motor 61. Preferably, the number of teeth of the first gear 62 is smaller than the number of teeth of the second gear 63, so that the lead screw 41 is driven to rotate in a reduction mode. One of the lead screws 41 of the first transmission mechanism 40 rotates and the other lead screw 41 is synchronously rotated through the second transmission mechanism 50, and the two sides of the placement platform 10 are driven to rise and fall synchronously, thereby improving the stability of the rise and fall of the placement platform 10.

[0037] In some preferred embodiments, a plurality of proximity switches 70 are arranged at intervals on the columns 32 of the guide frame 30 . When the placement platform 10 is raised or lowered, the placement platform 10 contacts the proximity switches 70 , so that the proximity switches 70 control the start and stop of the placement platform 10 .

[0038] The lifting device provided by the utility model has at least the following advantages:

[0039] 1. The lifting device provided by the utility model enables the placement platform 10 to be lifted and lowered smoothly by providing two first transmission mechanisms 40 .

[0040] 2. The lifting device provided by the present invention further enables the placement platform 10 to be lifted and lowered strictly in the vertical direction by providing two guide posts 43 .

[0041] 3. The lifting device provided by the utility model arranges the second transmission mechanism 50 at the bottom of the base 20, so that the structure of the entire device is compact.

[0042] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0043] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the utility model. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the utility model may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the utility model should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0044] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A lifting device, characterized in that: include: Base; placing a platform, which is located above the base; A guide frame, comprising two guide frames, the two guide frames are symmetrically arranged on both sides of the base; each guide frame has a top beam; The first transmission mechanism comprises two first transmission mechanisms, which are symmetrically arranged and correspond to the two guide frames respectively; each first transmission mechanism comprises a lead screw and a nut, the nut is installed on the side of the placement platform, and the lead screw is arranged between the base and the top beam of the guide frame and passes through the nut; A second transmission mechanism, which is arranged between the two lead screws of the first transmission mechanism to enable the two lead screws to rotate synchronously; A driving mechanism, used for driving any one of the lead screws in the two first transmission mechanisms to rotate; The guide column comprises at least one, at least one of which is installed between a top beam of the guide frame and the base and passes through a guide sleeve located on the side of the placement platform.

2. The lifting device according to claim 1, characterized in that: The second transmission mechanism includes a synchronous belt and two synchronous wheels; A positioning plate is fixed to each side of the bottom of the base by three positioning columns, and the lower end of the lead screw of the first transmission mechanism passes through the base and is rotatably connected to the positioning plate; The two synchronous wheels are respectively installed on the lower ends of the two lead screws, and the synchronous belt is sleeved on the two synchronous wheels.

3. The lifting device according to claim 2, characterized in that: The driving mechanism includes a driving motor and a first gear and a second gear meshing with each other; the driving motor is fixed on the base, the first gear is installed on the output shaft of the driving motor, and the second gear is installed on the lower end of one of the lead screws.

4. The lifting device according to claim 1, characterized in that: The guide frame has a column, and a plurality of proximity switches are arranged at intervals on the column. The proximity switches control the start and stop of the placement platform by contacting the side of the placement platform.

5. The lifting device according to claim 1, characterized in that: The guide columns include two, and the two guide columns are respectively arranged between the top beams of the two guide frames and the base.

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