CN214693103U

CN214693103U - Self-balancing linear motor lifting platform

Info

Publication number: CN214693103U
Application number: CN202120898104.4U
Authority: CN
Inventors: 贺伟南; 明阳
Original assignee: Sichuan Fick Technology Co ltd
Current assignee: Sichuan Fick Technology Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-12
Anticipated expiration: 2031-04-28

Abstract

The utility model provides a self-balancing linear electric motor lift platform, it relates to a lift platform to solve and adopt linear electric motor driven mode control displacement platform to go up and down, the load can not keep balanced in the removal process, influences the problem of motion precision. The utility model comprises a lifting platform panel, a linear motor, a supporting component, a constant force output component and two crossed roller guide rails which are arranged in parallel; two crossed roller guide rails and rotors of the linear motor are both arranged on the supporting component, two crossed roller guide rails are arranged between the lifting table panel and the supporting component, the lifting table panel is fixedly connected with a stator of the linear motor and can do linear motion along the crossed roller guide rails, and the lifting table panel is fixedly connected with the end part of an output shaft on the constant force output component. The utility model discloses having add constant force output assembly, having eliminated the influence of load gravity in the motion process, made to combine together and be zero to make the load can realize acceleration, deceleration and at the uniform velocity quick response at the removal of stroke within range high accuracy.

Description

Self-balancing linear motor lifting platform

Technical Field

The utility model relates to an electric lift platform, concretely relates to self-balancing linear electric motor lift platform.

Background

The traditional electric lifting platform basically uses a screw nut and a stepping motor or a servo motor structure to control the lifting of the platform surface of the displacement platform, so that the advantage is that the displacement platform has certain self-locking force in a stroke range, and the screw nut structure enables the load to be always kept balanced in the moving process. However, such a structure has some major problems. Such as: due to the existence of the back clearance of the screw rod nut, the installation and adjustment of the integral displacement table are difficult, and the consistency is difficult to achieve; the positioning precision and the repeatability precision after the installation are difficult to reach within a micron level; the increase of the stroke can greatly increase the structural size of the displacement table, and the precision is affected therewith.

Current patent application number 2019222693706, a patent of miniature cross roller guide rail linear electric motor platform adopts the lift of linear electric motor drive displacement platform mesa, has solved traditional lead screw nut back clearance and has leaded to the installation adjustment more difficult, and positioning accuracy and repeatability are difficult to reach the problem of micron order. But the load cannot be balanced during the movement due to the unbalance of the load.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that adopt linear electric motor driven mode control displacement platform to go up and down, the load is removing the process and can not keep balance, influences the problem of motion precision, provides a self-balancing linear electric motor lift platform.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a self-balancing linear motor lifting platform comprises a lifting platform panel, a linear motor, a supporting assembly, a constant force output assembly and two parallel crossed roller guide rails;

two crossed roller guide rails and rotors of the linear motor are both installed on the supporting component, two crossed roller guide rails are arranged between the lifting platform panel and the supporting component, the lifting platform panel is fixedly connected with a stator of the linear motor and can do linear motion along the crossed roller guide rails, the lifting platform panel is fixedly connected with the end part of an output shaft on the constant force output component, and the constant force output component is fixedly installed on the supporting component, so that the lifting platform panel is stressed along the guide direction of the crossed roller guide rails when in use and is opposite to the direction of load gravity.

The utility model has the advantages that: the linear motor is adopted for driving, so that the precision influence caused by friction can be reduced, the movement is more stable, and the crossed roller guide rail is adopted as a support, so that the contact area is large, and the rigidity and the stability are good. Compared with the movement mode of the existing nut screw, the screw nut back clearance does not exist, so that the installation and adjustment are convenient, and the positioning precision and the repeatability precision after the installation are finished are higher. The utility model discloses having add constant force output assembly, having eliminated the influence of load gravity in the motion process, having made to combine together for zero, required linear electric motor's power is littleer, reduces the volume, makes the structure compacter to make the load can be at the removal of journey within range high accuracy, realize acceleration, deceleration and at the uniform velocity quick response, set up constant force output assembly simultaneously, when the load stop motion, then can not fall along with the gravity.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, a balancing weight is installed on the lifting platform panel.

The beneficial effect of adopting above-mentioned further scheme sets up the balancing weight mainly used and increases the load counter weight, and is balanced mutually with the output power of constant force output component, makes the load can be at the removal of stroke within range high accuracy.

Further, the linear motor is a coreless linear motor.

The adoption of the further scheme has the beneficial effect that the attraction does not need to be processed when the coreless linear motor is installed, so that the installation is easy. The cogging effect is avoided, the more stable motion is easy to realize, the higher precision is realized, the stator is spliced, the stroke can be extended, the higher acceleration and deceleration can be obtained, and meanwhile, the precision influence caused by friction can be reduced, so that the motion is more stable.

Further, the support assembly includes a support frame; the constant force output assembly, the rotor of the linear motor and the two crossed roller guide rails are all fixedly arranged on the support frame.

The beneficial effect of adopting above-mentioned further scheme is that the installation support is provided for each part.

Further, the support assembly comprises a support frame and a bottom plate; the base plate is fixedly installed on the supporting frame, the rotor of the linear motor and the two crossed roller guide rails are both fixedly installed on the base plate, and the constant force output assembly is fixedly installed on the supporting frame or the base plate.

The beneficial effects of adopting above-mentioned further scheme are that with cross roller guide rail and linear electric motor complex bottom plate, the machining precision is higher, and the key face is polished with the grinding machine precision, and precision stability is good.

Further, the supporting component comprises a supporting frame, a bottom plate and a base; the base plate and the base are fixedly arranged on the supporting frame, the rotor of the linear motor and the two crossed roller guide rails are fixedly arranged on the base plate, and the constant force output assembly is fixedly arranged on the base.

The beneficial effects of adopting above-mentioned further scheme are that with cross roller guide rail and linear electric motor complex bottom plate, the machining precision is higher, is convenient for change and maintenance, simplifies the manufacturing of support frame simultaneously, reduces the manufacturing degree of difficulty, sets up the base and provides the support for constant force output subassembly.

Further, the bottom plate is made of stainless steel.

The beneficial effect of adopting above-mentioned further scheme is that can guarantee the flatness and the depth of parallelism of key plane (the plane with crossing roller guide rail and linear electric motor cooperation), and non-deformable guarantees installation and positioning accuracy.

Furthermore, a grating ruler is integrally arranged on the crossed roller guide rail.

The beneficial effect of adopting the further scheme is that the linear motor is controlled by closed-loop control, so that the lifting platform has higher motion precision.

Furthermore, a photoelectric limit switch is arranged at the movable limit position of the lifting platform panel on the supporting component.

The beneficial effect of adopting above-mentioned further scheme is used for detecting the extreme position that whether the transport of elevating platform panel or load is close maximum stroke.

Further, the support frame is made of aluminum alloy.

The beneficial effect of adopting the above further scheme is that the whole weight is reduced.

Furthermore, the lifting platform panel is provided with a mounting hole.

The beneficial effect of adopting above-mentioned further scheme is through bolted connection load.

Drawings

FIG. 1 is a schematic view of the present invention without a landing deck;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

fig. 4 is a schematic diagram of a constant force output assembly.

In the drawings, the components represented by the respective reference numerals are listed below:

10. a lifting platform panel; 20. a linear motor; 30. a support frame; 40. a base plate; 50. a cross roller guide rail; 60. a constant force output assembly; 70. a panel connector; 80. a base; 61. a fixed part; 62. output shaft, 63, magnet.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The embodiment aims to provide a self-balancing linear motor lifting platform to improve the installation precision of the lifting platform.

Example 1: the embodiment is described below with reference to fig. 1 to 4, and includes a platform panel 10, a linear motor 20, a support assembly, a constant force output assembly 60, and two parallel crossed roller guide rails 50;

the two crossed roller guide rails 50 and the mover of the linear motor 20 are both fixedly installed on the support assembly by bolts, the two crossed roller guide rails 50 are arranged between the elevating platform panel 10 and the support assembly, wherein the slide block part of the cross roller guide 50 is installed on the support assembly by a screw, the guide surface of the cross roller guide 50 is fixedly connected with the elevating platform panel 10 by a screw, the elevating platform panel 10 is fixedly connected with the stator of the linear motor 20 by a bolt, the lifting platform panel 10 is fixedly connected with the end part of an output shaft on the constant force output assembly 60, the constant force output assembly 60 is fixedly installed on the supporting assembly, and the output force of the constant force output assembly 60 acts on the lifting platform panel 10, so that the lifting platform panel 10 is stressed along the guiding direction of the crossed roller guide rails 50 and is opposite to the direction of the load gravity when in use.

The support assembly in this embodiment includes a support frame 30; the constant force output assembly 60, the mover of the linear motor 20 and the two crossed roller guides 50 are all fixedly mounted on the support frame 30.

In order to facilitate the connection between the lifting platform panel 10 and the output end of the constant force output assembly 60 and simplify the manufacturing of the lifting platform panel 10, the lifting platform panel 10 can be fixedly connected with the output end of the constant force output assembly 60 through the panel connecting piece 70, and the adjacent lifting platform panel 10, the panel connecting piece 70 and the output end of the constant force output assembly 60 are connected through screws. Wherein the panel connector 70 may be L-shaped.

In this embodiment, the supporting frame 30 may be made of stainless steel, so as to improve the installation accuracy of the cross roller guide 50 and the linear motor 20.

The output force of the constant force output assembly 60 is approximately equal to the sum of the weight of the lifting platform panel 10 and the weight of the load, and the gravity of the load is balanced by the mutual offset of the constant force output assembly 60, so that the load can move with high precision within the stroke range.

The constant force output component in this embodiment is a prior art, and may be a spring produced by kory force mol company, or may be replaced by a component of constant force output in other companies or prior arts, all of which are within the protection scope of this application. The spring manufactured by kory force mol company comprises a fixing part 61, an output shaft 62, a magnet 63 and the like, wherein the output shaft 62 is arranged on the fixing part 61 in a sliding manner through a bearing, the magnet 63 is arranged in the fixing part 61, and the output shaft 62 keeps constant force in a magnetic field of the fixing part 61, and the specific structure is not described again. The fixing portion 61 is fixedly installed on the base 80 or the supporting component.

In order to facilitate the installation and connection of the load, the lifting platform panel 10 is provided with an installation hole.

In order to facilitate wiring, the support component is provided with a wire outlet hole. The wire outlet hole is provided with a 3m controller connecting wire, the motor wire and the signal wire are respectively shielded by independent cables, and the displacement table cannot be interfered by external strong current and weak current.

Example 2: in this embodiment, a counter weight is attached to the platform panel 10 in addition to embodiment 1. When the load is not heavy enough, the weight of the load can be increased by adding the weight block, so that the total weight of the load, the weight block and the lifting platform panel 10 is approximately equal to the output force of the constant force output component 60.

Example 3: the present embodiment is different from embodiment 1 or 2 in that the linear motor 20 in the present embodiment is a coreless linear motor. The linear motor without the iron core is adopted, the power is relatively low, the higher acceleration and deceleration can be obtained, the cogging effect is avoided, and the higher movement precision can be realized. The defect of low power of the coreless linear motor can be made up by adding the constant force output assembly 60.

The non-contact linear motor is used for driving, so that the precision influence caused by friction can be reduced.

Example 4: the present embodiment is different from embodiment 1 in that the support assembly includes a support frame 30 and a base plate 40;

the base plate 40 is fixedly installed on the supporting frame 30, the mover of the linear motor 20 and the two crossed roller guides 50 are both fixedly installed on the base plate 40, and the constant force output assembly 60 is fixedly installed on the supporting frame 30 or the base plate 40.

The material of the supporting frame 30 in this embodiment may be different from that of the bottom plate 40, and the material of the supporting frame 30 may be an aluminum alloy material, so as to reduce the overall weight. The bottom plate 40 is made of stainless steel, the bottom plate 40 matched with the cross roller guide rail 50 and the linear motor 20 is high in machining precision, key surfaces are precisely polished by a grinding machine, and precision stability is good. When the device is installed, the whole weight is reduced, and meanwhile, the installation positioning precision is also ensured.

The supporting frame 30 and the bottom plate 40 may be made of the same material and made as an integral component, which is the same as the embodiment 1.

Example 5: the present embodiment is different from embodiment 1 in that the support assembly includes a support frame 30, a bottom plate 40, and a base 80; the base plate 40 and the base 80 are both fixedly installed on the supporting frame 30, the mover of the linear motor 20 and the two crossed roller guide rails 50 are both fixedly installed on the base plate 40, and the constant force output assembly 60 is fixedly installed on the base 40.

The bottom plate 40 matched with the cross roller guide rail 50 and the linear motor 20 has higher processing precision, is convenient to replace and maintain, simplifies the manufacturing of the support frame, reduces the manufacturing difficulty, and is provided with the base 80 to support the constant force output assembly. The support frame 30, the bottom plate 40 and the base 80 can be made of different materials, the support frame 30 and the base 80 can be made of aluminum alloy materials, and the bottom plate 40 can be made of stainless steel materials. The advantages are that the whole weight is reduced, the key surface is precisely polished by the grinder, and the precision stability is good.

The supporting frame 30, the bottom plate 40 and the base 80 can be made of the same material, which is the same as the embodiment 1.

In the above embodiment, the material of the bottom plate 40 is preferably 440C stainless steel, which ensures flatness and parallelism of the contact plane with the linear motor 20 and the cross roller guide 50, and is not easily deformed.

In the above embodiment, the material of the supporting frame 30 is preferably 7075 aluminum alloy.

Example 5: in this embodiment, on the basis of embodiment 3, a grating ruler is integrally installed on the cross roller guide 50.

The resolution of the grating ruler can be selected to be 0.1 mu m, the grating ruler is provided with a zero point, and the motion precision can be further provided by adopting closed-loop control.

Example 6: in this embodiment, on the basis of embodiments 1, 4, 5 or 6, a photoelectric limit switch is installed at the movable limit position of the platform panel 10 on the supporting component, and is used for detecting whether the platform panel 10 approaches the limit position.

Preferably, the photoelectric limit switch is mounted on the base plate 40, and when the support assembly includes only the support frame 30, is mounted on the support frame 30.

In the above embodiment, in order to improve the movement accuracy, the cross roller guide 50 has the flatness tolerance class of E6, the lift table panel 10 has the flatness tolerance class of E7; the horizontal and vertical straightness of the cross roller guide 50 is 5 μm, and the flatness of the table top plate 10 and the cross roller guide 50 is 18 μm.

In the embodiment, the repeatability precision of the lifting platform can reach within 1-2 mu m or even higher, and the absolute precision can also reach within 2-3 mu m or even higher by means of mechanical and driving compensation.

The working process is as follows: the linear motor 20 drives the lifting platform panel 10 to drive the load to move up and down along the vertical direction, the resultant force of the lifting platform panel 10 and the load is zero under the action of the output force of the constant force output assembly 60, and when the linear motor 20 drives the lifting platform panel 10 to do accelerated motion, uniform motion or decelerated motion, the gravity acceleration of the load per se can be ignored, so that the quick response can be realized, and the improvement of the motion precision is facilitated.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply 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 limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the present invention has been described in detail with reference to certain specific embodiments, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. For example, the utility model discloses can also make into an organic whole with arbitrary two or three in support frame 31, bottom plate 40 or base 80, when making into an organic whole, its material is the same, can select the material according to actual need, and the modification of doing above all is in the protection scope of this application. The scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a self-balancing linear electric motor lift platform, includes lift deck plate, linear electric motor, supporting component and two cross roller guide rail that arrange side by side, its characterized in that: the constant force output assembly is also included;

2. The self-balancing linear motor lifting platform of claim 1, further comprising a counterweight mounted on the lifting platform panel.

3. The self-balancing linear motor lifting platform according to claim 1 or 2, wherein the linear motor is a coreless linear motor.

4. The self-balancing linear motor lifting platform of claim 1, wherein: the support assembly comprises a support frame; the constant force output assembly, the rotor of the linear motor and the two crossed roller guide rails are all fixedly arranged on the support frame.

5. The self-balancing linear motor lifting platform of claim 1, wherein: the supporting assembly comprises a supporting frame and a bottom plate; the base plate is fixedly installed on the supporting frame, the rotor of the linear motor and the two crossed roller guide rails are both fixedly installed on the base plate, and the constant force output assembly is fixedly installed on the supporting frame or the base plate.

6. The self-balancing linear motor lifting platform of claim 1, wherein: the supporting component comprises a supporting frame, a bottom plate and a base; the base plate and the base are fixedly arranged on the supporting frame, the rotor of the linear motor and the two crossed roller guide rails are fixedly arranged on the base plate, and the constant force output assembly is fixedly arranged on the base.

7. The self-balancing linear motor lifting platform of claim 5 or 6, wherein: the bottom plate is made of stainless steel.

8. The self-balancing linear motor lifting platform as claimed in claim 3, wherein the cross roller guide rails are integrally provided with a grating ruler.

9. The self-balancing linear motor lifting platform as claimed in claim 1, wherein the support assembly is provided with a photoelectric limit switch at the movable limit position of the lifting platform panel.

10. The self-balancing linear motor lifting platform of any one of claims 4 to 6, wherein the support frame is made of aluminum alloy.